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Tytuł:
Analysis risk factors for preterm births in children under care of the Department of Pediatric Rehabilitation in Bialystok
Autorzy:
Dytrych, G.
Sienkiewicz, D.
Powiązania:
https://bibliotekanauki.pl/articles/1918768.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Preterm birth
risk factors
very low body mass
intrauterine infection
Opis:
Introduction: Preterm birth is the birth of a baby at fewer than 37 weeks' gestational age. Preterm infants are at risk for numerous medical problems including neurological, cardiological, respiratory, and infection. Purpose: To analyse the selected risk factors of preterm births among children under the care of the Department of Pediatric Rehabilitation in Białystok Materials and methods: The retrospective study included 96 preterm children with very low body mass less than 1500 grams. All children lived in the Podlasie region of Poland. We analysed the risk factors for preterm birth based on the medical files. The detailed interview included: the course of pregnancy, diseases before pregnancy, the prevalence of genetic diseases in the nearest family, and the earlier miscarriages. Results: The intrauterine infection (20 cases), fetal distress, (19 cases), uterine bleeding (15 cases), multiple pregnancies (13 cases) were the most often risk factors of preterm births. Only a few cases concerned congenital toxoplasmosis and cytomegaly, malformation of the reproductive system, mother diseases during the pregnancy. The gender of the child did not determine the preterm birth. A significant correlation between preterm birth and the sequence of pregnancy preterm birth was related with first pregnancy in 47% of cases. There was no correlation between i. body mass and sex, ii. earlier miscarriages and preterm births. Conclusions: The risk factors of preterm births are diverse. Most common causes of preterm births were the intrauterine infection, fetal distress, and uterine bleeding.
Źródło:
Progress in Health Sciences; 2018, 8(2); 99-104
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk factors for underground coal gasification
Autorzy:
Škvareková, Erika
Tomašková, Marianna
Wittenberger, Gabriel
Zelenák, Štefan
Powiązania:
https://bibliotekanauki.pl/articles/409838.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
analysis of risk
coal gas
environment
polluting gases
underground coal gasification
Opis:
The purpose of this article is to determine the environmental impacts of underground gasification on the population and to analyze the risk of underground coal gasification (UCG) activities using selected risk assessment methods. Coal gas is a regular part of coal deposits and its extraction also allows the use of coal deposits that cannot be extracted by traditional methods. These technologies bring both positive and negative aspects. The paper points out the risk analysis, hazard identification and assessment during the operation of UCG technology using a risk graph and a risk matrix. Identified risks to workers that cannot be reduced should be taken into consideration and appropriate safeguard should be used. For each risk, it is necessary to inform employees about regular education and training. From worldwide experience with this technology, it is possible to analyze risks in Slovakia. Actual gasification produces polluting gases such as carbon dioxide, carbon monoxide, hydrogen sulphide, hydrogen sulphide, nitrogen oxides, tar and ash, and creates a risk that may occur on and under the surface of the site depending on the geological and hydrogeological structure of the deposits. Possible measures to mitigate the adverse effects are proposed for the implementation of this technology. Coal is still one of the main domestic primary energy sources. Currently, only 5 out of 19 deposits in the Slovak Republic are used. Underground gasification could increase the use of Slovak coal and brown coal deposits.
Źródło:
Management Systems in Production Engineering; 2019, 4 (27); 227-235
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zagrożeń powodziowych w zlewni rzeki Piotrówki
Analysis of flood risk in Piotrówka river catchment
Autorzy:
Czamara, W.
Rosik-Dulewska, C.
Lipka, R.
Wiatkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1819809.pdf
Data publikacji:
2009
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
powódź
zlewnia rzeki
analiza zagrożeń
analysis risk
river catchment
Opis:
Zagrożenie powodziowe w Polsce występuje na powierzchni ponad 2 mln hektarów, obejmujących obszary dolinowe i przymorskie, stanowi to ok. 7% powierzchni kraju [1]. Na obszarze tym występują różne typy powodzi o różnym zakresie przestrzennym i czasie występowania. Najczęstszą przyczyną ich pojawiania się stanowią opady atmosferyczne, które w okresie (półroczach letnich) 1941÷2001 były przyczyną powstawania powodzi w 59% przypadkach. Ponadto w analizowanym okresie, w półroczach zimowych (od listopada do kwietnia), najczęściej pojawiały się powodzie sztormowe (13%), zatorowe (10%), roztopowe (8%), i roztopowo-opadowe (5%). Wystąpiły również awarie urządzeń wodnych, stanowiły one przyczynę 5% powodzi [15]. Powódź jest zjawiskiem przyrodniczym, występującym nieregularnie i na ogół ma gwałtowny przebieg [17]. Wyeliminowanie powodzi jest niemożliwe, gdyż nie można kontrolować takich zjawisk jak opad atmosferyczny, można natomiast ograniczyć wielkość strat spowodowanych powodzią [21]. Na zmniejszenie strat powodziowych można wpływać poprzez rozwiązania techniczne i nietechniczne. Ze względu na stosowane środki techniczne, ochronę przeciwpowodziową dzieli się na czynną i bierną [18, 22].
The flood risk in Poland is found on more than 2 millions hectare area (valley and coastal territory) that constitute about 7% of country area [1]. There are a various types of flooding that are characterized by diverse duration and spatial scope. The reason of flooding occurrence in 59% of cases are precipitation and this was a main reason of inundation in 1941 - 2001 season. The dissertation concerns issues of flood protection in Piotrówka river catchment localized in south Poland. In the last few years the increase of flood incidence can be observed in the considered catchment area. The range of floods also increases and, as a result, larger areas get flooded, which makes consequences of each flood more severe. The instances are flood from July 1997 when the streamflow reached Q = 53.2 m3/s and from 24th August 2005 when the maximum historical flow of Q = 64.9 m3/s was reached. Due to the fact that Piotrówka flows to the Czech Republic, it causes flood risk for both countries. In this paper the flood risk for Piotrówka river catchment has been identified by determining flooded areas and proposing a course of action to protect areas most vulnerable to a flood wave. Flood areas determined by the flow of the probability of occurrence of p = 1% (Qmax 1%) and maximal historical flow of the probability of occurrence of p = 0.04% (Qmax 0.04%) (that took place on 24th August 2005) have also been set. According to methodic given by Radczuk and al. [2001] the range of the areas has been established by determining the location of points of the highest water level on Włodzimierz Czamara, Czesława Rosik-Dulewska, Roman Lipka, Mirosław Wiatkowski 958 Środkowo-Pomorskie Towarzystwo Naukowe Ochrony Środowiska the cross-section of Piotrówka river channel. Flood area presented on topographic maps with the aid of Corel Draw 12.0 graphic program. Different options of flood protection, constituting proposals of solutions for the valley of Piotrówka river have been analyzed. What has been proposed: building of dikes, appropriate land use planning in flooded area, realisation of pondage program by the building of small reservoirs, but also agromelioration and reforestation in basin, introducing the Local Flood Warning System in order to increase of efficacy to warn off from flooding,implementation of mechanism of flood risk management according to Directive 2007/60/EC on the assessment and management of flood risks. These actions will enhance flood prevention and reduce negative consequences of inundation at the same time.
Źródło:
Rocznik Ochrona Środowiska; 2009, Tom 11; 945-958
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis in maintenance processes
Autorzy:
Drożyner, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/1818983.pdf
Data publikacji:
2020
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
risk analysis
maintenance
reliability
analiza ryzyka
konserwacja
niezawodność
Opis:
The article aims to present practical methods for prioritising the activities of maintenance departments based on the Pareto analysis and the failure risk analysis. Based on the collected data on the number of observed failures and their removal times, commonly known reliability indicators were determined, which were then used to estimate the probabilities and consequences of failures in terms of the risk of loss of production continuity. Based on commonly collected failure data, the developed methods allow proposing to the maintenance departments the sequence of maintenance and repair work to be undertaken in terms of minimising the risk of failure. Risk analysis is somewhat commonly used in the practice of maintenance departments (e.g. RBI, FMEA, ETA, FTE, HIRA). The added value of this work is the use of reliability indicators for estimating the values of risk components, i.e., probability and consequences. The method was developed on the basis of operational data collected in one of the plants of the dairy cooperative and, after assessing the effects of its implementation, it was implemented in other enterprises of the cooperative.
Źródło:
Engineering Management in Production and Services; 2020, 12, 4; 64--76
2543-6597
2543-912X
Pojawia się w:
Engineering Management in Production and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk management processes in the IT industry
Autorzy:
Trzeciak, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/1931561.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
risk
project management
IT project
Agile
ryzyko
zarządzanie projektami
projekt IT
Opis:
Purpose: The aim of the article is to analyse the risk management process in IT projects managed using the agile methods. Design/methodology/approach: The research was conducted through in-depth structured interviews on a sample of 111 project managers, leaders and project team members. Findings: In the conducted research, attention was paid to the identification of risk factors, their assessment during project planning, management of key risk factors and the importance of risk analysis for project success. The test results were compared with a critical analysis of the literature on the subject of research. Originality/value: The results of a survey of company heads become input information for the analysis, which allowed to confirm theoretical knowledge with the practical experience of company heads and emphasize the importance of the human factor in the risk management.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 142; 95-106
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new mathematical model for analytical risk assessment and prediction in IT systems
Autorzy:
Fray, I. E.
Kurkowski, M.
Pejaś, J.
Maćków, W.
Powiązania:
https://bibliotekanauki.pl/articles/206238.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
risk analysis
risk analysis methods
formal model for risk analysis
Opis:
In this paper, we propose a new formal model to describe risk analysis and measurement process for IT systems. Our model complies with international standards and recommendations for non-profit organisations. The model accounts for solutions used in widely known and recommended risk analysis methods and provides for evaluation of efficacy of these solutions. A simple example illustrates the application of the proposed model for effective risk analysis of any IT system.
Źródło:
Control and Cybernetics; 2012, 41, 1; 241-268
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis of transport systems
Autorzy:
Smalko, Z.
Powiązania:
https://bibliotekanauki.pl/articles/243512.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Opis:
It is assumed that the decision analysis is to be used to create rational premises of safe operation of controlled systems under uncertainty conditions. Diagnosis and Decision System is described on the system, which consists of the environment diagnostic facilities human being controlled system. The function of this system is to recognise dangerous operating situations and to generate a warning that some danger might occur as well as to create rational premises for prevention of incorrect decisions that are made during the operation of the controlled system. The processing of messages is carried out in compliance with the conventional Calculus of logic including the double negation law. The Diagnosis and Decision model presented in this paper is universal to a great extent. The block diagram of the diagnosis and decision system, tree of events in a DD system, message creation tables are presented in the paper. The block diagram of the diagnosis and decision system includes Environment, Controlled System, Human Being (Operator, Diagnostician), Diagnostic Facilities, Controlled System or Environment Output State, Hazard Symptom, Warning Signal, Operation Decision. Tree of Events includes occurrence of a controlled system inoperativity or operativity state, presence or absence of: a symptom, a signal; controlled system operation permitting or inhibiting decision, message identity or negation processing law. Message Creation Tables includes presence or absence of: a false symptom, a true symptom, a false alarm, a true ALARM; correct or incorrect: permission, controlled system operation inhibition.
Źródło:
Journal of KONES; 2008, 15, 3; 493-498
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazard analysis and risk assessment in metal cutting process
Autorzy:
Kotus, Martin
Drlička, Róbert
Mikuš, Rastislav
Žarnovský, Jozef
Powiązania:
https://bibliotekanauki.pl/articles/2064921.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
safety
threat
risk rate
manufacturing plant
band saw
Opis:
The paper deals with the issue of occupational health and safety in a metalworking manufacturing organization. Hazard and threat have been defined when cutting metal materials with a band saw. We assessed the risk by an extended point method, where we determined the risk rate values. In most cases of sawmill work, we found a “moderate” or “negligible” risk. The highest, ‘serious’ risk we found in a possible electric shock. In this case, we have also taken the necessary actions. As a precaution, we have also proposed safety measures for other threats.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 382--391
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk and failure scenarios in water supply system
Autorzy:
Boryczko, K.
Rak, J.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069508.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
fault tree analysis
matrix methods
risk analysis
water supply system
Opis:
Water supply system is complicated technical system which belongs to underground urban infrastructure. Its accurate functioning determines everyday live stability of citizens. Risk analysis is a key phase of the process of water supply safety management. The aim of this paper is to present new propose of methods for risk of the first type (associated with quantity of supplied water) and the risk of the second type (associated with quality of supplied water) analyses in water supply system. The paper contains the description of matrix methods for risk analyses and methods describing cause-and-effect relationship of failure events (fault tree analysis).
Źródło:
Journal of Polish Safety and Reliability Association; 2014, 5, 2; 11--18
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka covered call
Analysis of risk of covered call
Autorzy:
Dziawgo, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/583879.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
instrumenty finansowe
zarządzanie ryzykiem
financial instruments
risk management
Opis:
W wyniku wzrostu zmienności warunków rynkowych wzrasta zapotrzebowanie na nowe metody zarządzania ryzykiem, których umiejętne zastosowanie przyczyni się do poprawy wyników finansowych. Strategia covered call polega na wystawieniu opcji kupna na posiadane instrumenty podstawowe. Na giełdzie covered call jest jedną z najczęściej stosowanych strategii. W artykule przedstawiono analizę ryzyka strategii covered call. Celem opracowania jest zbadanie wpływu ceny instrumentu bazowego, czasu wygaśnięcia oraz wahań zmienności ceny instrumentu bazowego na kształtowanie się ryzyka strategii covered call. Ilustracja empiryczna jest przeprowadzona na podstawie symulacji wyceny walutowych opcji kupna na EUR/PLN.
The changing in the volatility of market conditions increases the demand for new methods of risk management. Covered call is an option strategy where the investor holds a long position in the underlying instrument and sells call option on the same underlying instrument. The article presents the analysis of the risk of the covered strategy. The objective of the work is to present the analysis of the impact of selected factors (the price of the underlying instrument, the time to maturity, the volatility of the price of the underlying instrument) on the value of delta, gamma, vega and theta coefficient. These coefficients are the measures of options risk. The empirical illustration is carried out on the pricing simulations of the currency call option on EUR/PLN.
Źródło:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2018, 531; 95-102
1899-3192
Pojawia się w:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Migration Crisis – risk analysis for 2017
Autorzy:
El Ghamari, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1202385.pdf
Data publikacji:
2018
Wydawca:
Wyższa Szkoła Biznesu w Dąbrowie Górniczej
Tematy:
Migrant crisis
Frontex
Migrats routs
Risk analysis
Opis:
Regular passenger flows across external borders will also grow significantly in the coming years, in particular at the air border, due to increased global mobility. Visa liberalisation processes and local border traffic agreements also lead to greater responsibility for bordercontrol authorities. Movements across external air borders are managed through a layered approach, where the border is divided into four tiers. In this context, the physical border is gradually becoming a second ary layer for risk assessment, meaning that checking and screening start well before passengers cross bordercontrol posts at airports.
Źródło:
Security Forum; 2018, 1, Volume 2 No 1/2018; 37-49
2544-1809
Pojawia się w:
Security Forum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advances in risk analysis in railway signalling
Autorzy:
Jensen, B.
Griebel, S.,
Powiązania:
https://bibliotekanauki.pl/articles/2069433.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
level crossing
semi-quantitative method
safety
EN50126
EN50129
Opis:
The paper is concerned with the developments of risk analysis during the last decade, starting from full range quantitative risk analysis of e.g. a level crossing based on the CENELEC standards EN50126 and EN50129 up to semi-quantitative methods for risk analysis. To expedite this shift from pure quantitative approaches to a more categorized approach were the perennial challenges of insufficient availability of accurate data and the sheer complexity of the reality to be model quantitatively. The article contains both a presentation of a complete quantitative risk analysis for a level crossing as well as a discussion of the crucial points that will need improvement on the basis of a new semi-quantitative standard for risk analysis that has been issued as a national pre-standard in Germany. The relation to the current regulations stipulated by the European Railway Agency and recent publications on this issue are presented as well.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 1; 101--108
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for risk analysis in disaster reduction
Autorzy:
Van Gelder, P. H. A. J. M.
Powiązania:
https://bibliotekanauki.pl/articles/2069580.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
disaster reduction
natural hazards
Opis:
This paper discusses a proposal for a risk management tool for applications to risk reduction of natural hazards.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 1; 121--125
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis in designing of body armour
Autorzy:
Struszczyk, M.H.
Powiązania:
https://bibliotekanauki.pl/articles/237953.pdf
Data publikacji:
2009
Wydawca:
Instytut Technologii Bezpieczeństwa Moratex
Tematy:
kamizelka kuloodporna
projektowanie zbroi
analiza ryzyka
bullet-proof vest
armor design
risk analysis
Opis:
Risk analysis is helpful tools in design of body armor, such as: bullet, fragments proof vests. The proper design process requires the nowledge for all aspects connected with construction, selection of raw-materials, consumer needs as well as the performance and safety during the use and storage. The paper will be present the application of risk analysis in designing of modern contractions of body armors. Several aspects should be taken into account The hazards resulted from technological process, election of raw materials, comfort-ability, the lost of performance and safety during the standard use and storage will be presented and evaluated.
Źródło:
Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 2/3, 2/3; 66-73
1230-7491
Pojawia się w:
Techniczne Wyroby Włókiennicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis on scaffoldings exposed to noise
Autorzy:
Jabłoński, M.
Szer, I.
Szer, J.
Powiązania:
https://bibliotekanauki.pl/articles/105011.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
environmental studies
noise
scaffolding
sound level
Opis:
The article presents the results of environmental tests performed on scaffolding that were focused mainly on the sound level. The parameters on which we base our analysis are the value of daily noise exposure level and peak sound levels on scaffolding. The noise that affects construction workers on scaffolding, may increase the risk of accidents. We present the results of measurements for twenty two scaffolds in five cities. The analyses carried out confirmed the qualitatively expected dependencies but they allowed us to quantify the impact of the noise on which construction workers on the scaffolding are exposed. The noise occurs continuously throughout the day and can cause faster fatigue, thereby it can increase the risk of accidents in noisy work environment.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 1; 117-125
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water distribution system
Autorzy:
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069656.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
failure
risk
water distribution system
Opis:
A water distribution system (WDS) ought to be high reliable continuous operating system. Failure factors in WDS should be identified and prioritised, for example, the causing factors in the most frequent failures in water-pipe network. In this paper, the failure risk analysis of the WDS is presented, and accordingly, a New method consisting the failures index (FI) and the evaluation of risk of failure within the relevant area, based on the assumed categories (tolerable, controlled and unacceptable risk). It is expecting that the methodology for the WDS performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 247--254
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis when navigating in restricted sea areas
Autorzy:
Rutkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/320869.pdf
Data publikacji:
2006
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
analiza ryzyka
wody ograniczone
risk analysis
restricted waters
Opis:
This paper discusses the question of classifying the sea areas as sea areas difficult for navigation, unrestricted sea areas and sea areas restricted by land (bottom or shore). Most of all, the article depicts the characteristics of restricted sea areas. It presents the attempt to define in a new way the following notions: "safety of shipping", "safety of navigation", "risk of navigation", "risk of collisions", "navigational obstacle", and "sea area difficult for navigation". In this paper author also presents methods that can be used for estimating safety of navigation (navigational risk) in the restricted sea areas by means of the model of the ship's domain. The essence of the method suggested in the thesis is the systematic approach to sea vessel operation in the aspect of estimating its safety when navigating in restricted sea areas.
Źródło:
Annual of Navigation; 2006, 11; 103-122
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of suitable methods during risk analysis
Autorzy:
Lošonczi, Peter
Veľas, Andrej
Kručanica, Ladislav
Powiązania:
https://bibliotekanauki.pl/articles/2131202.pdf
Data publikacji:
2016
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
analysis
risk
method
security
Opis:
Risk analysis is an important element for knowing and understanding potential risks in the protection of a protected interest. The number of factors that influence a risk is high and heterogeneous, what gives a width dimension to the risk analysis. Choosing a suitable method of risk analysis is crucial for successful outcomes, for further modification of risks and actions against them.
Źródło:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne; 2016, 2(21); 119-122
1898-8431
Pojawia się w:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk in systems with virtualization : test case analysis
Autorzy:
Stanclik, M.
Walkowiak, T.
Powiązania:
https://bibliotekanauki.pl/articles/2069148.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
virtualization
risk analysis
threats
Opis:
The paper presents an approach to risk analysis of exemplar test case information systems. Authors point out the common practice to implement virtualization and put away security considerations for future[5]. The overview of virtualization techniques, focusing on server virtualization is given. Next, authors present risk analysis of exemplar GIS system. First of all identification of threats is taken out focusing on virtualization aspects, but it also includes common threats for both that could have a significant impact on safety when using a virtualization. The risk assessment for the test case system was performed using qualitative method. Assessment of the likelihood and magnitude of impact of identified risks was performed on the basis of the expert’s knowledge and experience. The obtained results were used to develop risk rankings, which indicate the risks that need special attention when designing and managing a virtual system.
Źródło:
Journal of Polish Safety and Reliability Association; 2013, 4, 2; 249--258
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis of actions in key business processes
Autorzy:
Grabowska, S.
Powiązania:
https://bibliotekanauki.pl/articles/324969.pdf
Data publikacji:
2016
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
procesy biznesowe
ryzyko
business processes
risk
Opis:
Zarządzanie ryzykiem stanowi jeden z elementów pracy menedżera. Świadome i uporządkowane zarządzanie ryzykiem pozwala ograniczyć niepewność w zarządzaniu procesami biznesowymi. Celem artykułu jest przedstawienie i analiza ryzyka występującego w procesach biznesowych badanych przedsiębiorstw z branży turystycznej.
Risk management is one of the elements of the manager's work. The deliberate and structured risk management helps reduce uncertainty in the management of business processes. The aim of the publication is to present and analyze the risks involved in business processes studied tourism enterprises.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2016, 93; 153-161
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Analysis in Documentary Letter of Credit Operation
Autorzy:
Alavi, Hamed
Powiązania:
https://bibliotekanauki.pl/articles/943299.pdf
Data publikacji:
2016-11-27
Wydawca:
Uniwersytet Gdański. Centrum Prawa Samorządowego i Prawa Finansów Lokalnych
Opis:
Documentary Letters of Credit are among most popular methods of payment used in international trade. They function as an irrevocable promise of issuing a bank to pay instead of an applicant buyer to a beneficiary seller under the condition that the beneficiary presents complying documents with terms and conditions of the credit to the bank. One of the reasons for the popularity of the LCs in international trade is shifting the payment risk from an individual buyer to a bank with a much stronger financial standing. However, LC operation in international trade is not free of risk. Despite the fact that two main principles of the Documentary Letter of Credit’s Operation (Principle of independence and principle of strict compliance) facilitate the process of international trade significantly, but still all parties involved in LC operation are supposed to be cautious about the existing risks relevant to their role in LC operation. Current paper tries to use legal principles of documentary credits and risk management theory in order to define existing risks to each party (beneficiary, applicant and bank) in international LC transaction and find an answer to the question of what are exposing risks for involved parties? For this purpose, the paper starts with an explanation of the two main principles of LC operation and moves forward with using the risk management theory to explain existing risks for each party in detail.
Źródło:
Financial Law Review; 2016, 1, 4; 27-45
2299-6834
Pojawia się w:
Financial Law Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pest risk analysis on Xylella fastidiosa in Morocco
Autorzy:
Afechtal, M.
Vicent, A.
Saponari, M.
D’Onghia, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/65631.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pest
risk analysis
plant pathogen
Xylella fastidiosa
Gram-negative bacterium
Morocco
Opis:
Morocco is basically an agricultural country; almost 40% of the workforce is employed in this sector. Xylella fastidiosa is a xylem-inhabiting pathogen which can infect more than 300 plant species, although most host species are symptomless. Until relatively recently, X. fastidiosa was primarily limited to North and South America, but in 2013 a widespread epidemic of olive quick decline syndrome caused by this fastidious pathogen appeared in southeastern Italy, and later several cases of X. fastidiosa outbreaks have been reported in other European countries (France, Germany and Spain). Following these recently confirmed findings of X. fastidiosa in the European Union, this bacterium has become a serious threat to the Moroccan flora. The national phytosanitary authorities have adopted several measures to prevent the introduction of X. fastidiosa into the national territory by deciding, inter alia, to suspend importation of host plant species to the bacterium from infected areas. This paper presents the phytosanitary risk of this bacterium in Morocco.
Źródło:
Journal of Plant Protection Research; 2018, 58, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of Linguistic Variables and the FMEA Analysis in Risk Assessment in Inland Navigation
Autorzy:
Skupień, E.
Tubis, A.
Powiązania:
https://bibliotekanauki.pl/articles/116027.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
inland shipping
risk assessment
Failure Modes and Effects Analyses (FMEA)
FMEA analysis
FMEA method
linguistic variables
risk factors
inland navigation
Opis:
The paper continues the study of the same authors, who previously proposed a method of risk assessment in inland navigation. In the literature there is a gap in the research area of a risk management of transportation systems, especially: inland navigation. The authors carried out interdisciplinary research and presented the results related to the identification of risk factors present in the systems of inland navigation. The paper presents inland navigation risk analysis, conducted using the linguistic variables and the FMEA method, taking into account technical, economic and social aspects. The aim of the article is to present a procedure for the assessment of risk in inland waterways transport, and carry out risk analysis for transport companies. In paper the proposal of behavior scenarios, methods of preventing and minimizing effects of pointed risks are shown.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 143-148
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examples of bow-tie risk analysis at maritime transport
Autorzy:
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/242341.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
risk analysis
BowTie method
AHTS ships
Opis:
There are different approaches to risk assessment. The SOLAS Convention is the most important safety instruments at maritime transport. The biggest risk is a major navigational incident because it can result in fatalities and pollution. Possibly the major cause of collision incidents is not fully understanding and complying the COLREGS rules. It is not possible to create a simple flowchart to define a suitable approach to risk assessment of a ship. However, some of broad factors can be used to aid the selection of a suitable risk assessment approach in maritime transport. In the literature, we can find many methods and applications for maritime transportation risk analysis. There is a recent focus on foundational issues in risk analysis, especially for intensified research on fundamental concepts and principles. This paper presents the attempt of applying the Bow-Tie methodology at maritime transport. The benefits of using Bow-Tie diagrams for risk assessment have been showed at use, for many of technical systems and processes. This methodology known as barrier diagrams, provide a readily understandable visualization of the relationships between the causes of the failure's event, the escalation of such events to a range of possible outcomes, the controls preventing the event from occurring and the preparedness measures in place to limit the consequences. The Bow-Tie is very useful for structured assessment and communication of risks.
Źródło:
Journal of KONES; 2016, 23, 3; 489-494
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena czułości modeli operacyjno-eksploatacyjnych
Elasticity analysis in risk assessment of models of operation process
Autorzy:
Guze, S.
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/257704.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
czułość
eksploatacja
ocena ryzyka
elasticity
operation process
risk assessment
Opis:
W artykule zdefiniowano i opisano podstawowe modele procesu operacyjno-eksploatacyjnego. Podano definicję czułości funkcji oraz jej własności. Przeprowadzono analizę elastyczności jednego, wybranego modelu procesu operacyjno-eksploatacyjnego. Pokazano przykład zastosowania.
The article defines and describes the basic operation process models. The definition of the elasticity of function and its properties are given. An analysis of the elasticity of a single selected model of the operation process is carried out. Further, an example of the application is shown.
Źródło:
Problemy Eksploatacji; 2009, 4; 105-113
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis with an application to local road infrastructure
Autorzy:
Kokoszka, W.
Powiązania:
https://bibliotekanauki.pl/articles/104525.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
natural hazard
road
flood
landslide
risk matrix
Opis:
The paper presents the concept of the risk evaluation for road infrastructure exposed to natural hazards - floods and landslides. Floods and surface mass movements impose a serious threat to the contemporary activities and people’s lives in modern economy. The natural meteorological and hydrological phenomena are main causes of a landslide activation. Typically, heavy or prolonged rain is combined with the progressive flooding. In river valleys, an increased lateral erosion of rivers and rapid snow melting in early spring would also lead to flood events. In Poland, the Carpathian regions are mostly predisposed to the formation of landslides. This may be favoured by the nature of shapes associated with high and steeply sloping slopes of the valleys and flysch geological structure. The paper presents the general characteristics of precipitation in Poland and the concept of a risk assessment with risk matrix. The issue is illustrated by an exemplary detailed risk matrix for a selected section of the road infrastructure in Subcarpathian province.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 4; 69-80
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
RIPRAN – one of the best project risk analysis methodologies
Autorzy:
Bočková, K.
Lajčin, D.
Powiązania:
https://bibliotekanauki.pl/articles/108414.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
project management
project risk management
RIPRAN
Opis:
Project risk management is an important aspect of project management. According to the PMBoK, risk management is one of the ten knowledge areas in which a project manager must be competent. Project risk management remains a relatively undeveloped discipline, distinct from the risk management used by operational, financial, and underwriters’ risk management. This gulf is due to several factors: risk aversion (especially public understanding and risk in social activities), confusion in the application of risk management to projects, and the additional sophistication of probability mechanics above those of accounting, finance, and engineering. The aim of the presented paper is to demonstrate how to use RIPRAN (the Czech project for risk analysis) as a main part of a feasibility study of a new product project in a manufacturing company. To fulfill this primary aim, we formulated these secondary aims: – To provide a critical analysis of the available information sources dealing with risk management in new product projects in manufacturing companies. – To study and profoundly understand RIPRAN, project risk analysis, its history, application, principles, rules, and exceptions. – To discuss with the author of RIPRAN about the RIPRAN application in new product projects in manufacturing companies of non-Czech origin. – To compile a feasibility study of the new product project. All of these highly cited secondary aims were fulfilled. A short overview of the risk management topic as well as RIPRAN’s characteristics and definition are part of the presented paper. To process this theoretical part of the paper, we used mostly analysis, synthesis, comparison, and deduction. We studied monographs, journals, and internet links with the impact of a source's topicality. The used sources are cited in the list of references. During the process of a feasibility study of a new product project provided through the analysis of our own experience, we discussed the application of the RIPRAN method to the new product project with the author of this method. We realized e-mail correspondence, phone discussions, and finally a personal meeting to control the whole RIPRAN analysis document and discuss the method’s application in the non-Czech origin business environment. To fulfill the primary aim of the presented paper, we decided to use the case study method.
Źródło:
Managerial Economics; 2018, 19, 1; 7-24
1898-1143
Pojawia się w:
Managerial Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A framework for corrosion assessment in metallic structures, from data analysis to risk based inspection
Autorzy:
Cui, Xiaofei
Liang, Xiaoxia
Bharadwaj, Ujjwal
Powiązania:
https://bibliotekanauki.pl/articles/1841787.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
corrosion estimation
steel bridge
metallic structures
risk based inspection
software
Opis:
Metallic corrosion is a big challenge affecting many sectors in a nation’s economy. Necessary corrosion prevention actions have to be taken in order to maintain the integrity of engineering assets susceptible to corrosion. This paper proposes a holistic framework to support the management of corrosion in metallic structures. It is a fully automation corrosion assessment process, with risk updated by Bayesian theory. Through analyzing the thickness data measured by non-destructive testing (NDT) techniques, the influence of corrosion on the component can be estimated using statistical methods, which will enable users to make decisions on maintenance based on quantitative information. A case study using corrosion data from a steel bridge is included to demonstrate the proposed framework. It improved the conventional corrosion analysis method by the proposed statistical approach using representative thickness data, which aims to take full use of the remaining life. This model can be adapted to a wide range of metallic structure suffering from corrosion damage.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 11-20
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk factors for oral cavity and oropharynx cancer in the authors’ own material
Autorzy:
Nowosielska-Grygiel, Joanna
Owczarek, Kalina
Bielińska, Marzena
Wacławek, Magdalena
Olszewski, Jurek
Powiązania:
https://bibliotekanauki.pl/articles/1398310.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
risk factors
oral cavity
oropharynx cancer
Opis:
Introduction: The aim of the study was to analyse the risk factors for oral cavity and oropharynx cancer in peopled examined under the Head and Neck Cancer Awareness Week in 2016, Lodz. Material and methods. In Lodz, 21st September 2016, under the Head and Neck Cancer Awareness Week, 106 people, including 67 women aged 29–77 and 39 men aged 23–84, underwent preventive examinations in the hospital department. Prior to the laryngological examination, the patients were asked to answer questions that referred to their education, medical case history, symptoms, smoking habits with the number of cigarettes per day, alcohol intake, the number of lifetime sexual partners, oral sex engagement, incidents of head and neck cancer in the family history. Results: The major part of the examined patients were women and men with the secondary and high level of education, 47,76% and 35,82%, and 58,97% and 35,91% respectively. The patients were informed by mass media about the planned preventive medical examinations – 80,60% women and 79,49% men. The most common symptoms reported by women were: hoarse voice in 61,19% cases, dysphagia in 32,84% cases and burning sensation and/or pain in the oral cavity in 29,85% cases. The examined male patients mainly showed hoarse voice (46,15%), other symptoms (43,59%) and dysphagia (25,64%). 28,35% women and 28,20% men smoked cigarettes, while passive smokers were 22,38% and 25,64% respectively. Alcohol consumption was reported by 67,16% women and 82,05% men, rather occasionally. Having oral sex was noted in 25,37% women and 38,46% men, mostly with multiple sexual partners. Among the studied patients, 13,43% women and 5,12% men suffered from malignant cancer, including 2,98% women and 2,56% men who reported head and neck carcinoma in the medical interview. On the basis of the interview and ENT examination, 11,94% women and 17,94% men were qualified for the extended oncological diagnostics. Conclussion. The Fourth Head and Neck Cancer Awareness Week shows the increased interest in preventive screening, especially oncological screening, and thus the necessity of such preventive activities in the future.
Źródło:
Polish Journal of Otolaryngology; 2017, 71, 2; 23-28
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water supply sector management
Autorzy:
Tchórzewska-Cieślak, B.
Rak, J. R.
Pietrucha, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069627.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply
risk management
safety
critical infrastructure
Opis:
The subject and main purpose of this study is to develop risk analytic model for the design and operation of water supply sector. A water supply system belongs to the critical infrastructure of cities, and it should be a priority task for waterworks and even for the local authorities to ensure the suitable level of its safety. A water supply systems (WSS) ought to be high reliable continuous operating system. Failure factors in WSS should be identified and prioritized, for example, the causing factors in the most frequent failures in waterpipe network. Drinking water supply utilities are responsible for providing a safe and reliable supply of potable water to their customers. Risk priority helps asset manager to target and refine maintenance plans, capital expenditure plans, investigative activities, and deal with potential failure before it occurs. In this paper, we present a review of classic risk analyses, risk management and new methodology for water supply networks management. This paper presents a framework for the analysis of performance risk in water supply that can be applied to the entire system or to individual subsystems. It is expecting that the methodology for the water supply performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 185--196
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using the dematel model for the FMEA risk analysis
Autorzy:
Bujna, Marián
Kotus, Martin
Matušeková, Eva
Powiązania:
https://bibliotekanauki.pl/articles/88673.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
safety
risk management
work process
quality production
bezpieczeństwo
zarządzanie ryzykiem
proces pracy
jakość produkcji
Opis:
Technological progress has brought a large amount of complex machinery into the work processes, which represents a potential source of serious injuries, accidents, or breakdowns. The aim of this paper is to follow new trends in the FMEA and their use in our study. We have chosen the Turning Machine Doosan V-Puma Doosan PUMA V550R Machining Centre with manufacturing diameters and mechanical machining operations. We have created the FMEA team, which participated in the entire evaluation and analysis. We identified possible failures and causes of failures in the given operations. We applied the conventional PFMEA and identified the RPN risk number. We also used DEMATEL model. Using DEMATEL matrices, we identified a binding between the individual failures and the causes of the failures. Some failures will become the main cause of other failures and the causes of the failures; some arise as a result of other failures or causes of failures. Finally, we evaluated the applicability of individual methods and models. By the DEMATEL model we clarified the significance and bindings between individual failures.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 550-557
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis in surveying works related to roads construction
Autorzy:
Kowacka, M.
Skorupka, D.
Duchaczek, A.
Waniewska, A.
Dudziak-Gajowiak, D.
Powiązania:
https://bibliotekanauki.pl/articles/886734.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Scientific Review Engineering and Environmental Sciences; 2019, 28, 3[85]
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistically (optimal) estimators of semivariance: A correction of Josephy-Aczel’s proof
Autorzy:
Fleischer, Karlheinz
Nietert, Bernhard
Powiązania:
https://bibliotekanauki.pl/articles/433944.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
risk analysis
semivariance
statistical estimation
Opis:
Semivariance is an intuitive risk measure because it concentrates on the shortfall below a target and not on total variation. To successfully use semivariance in practice, however, a statistical estimator of semivariance is needed; Josephy and Aczel provide such an estimator. Unfortunately, they have not correctly proven asymptotic unbiasedness and mean squared error consistency of their estimator since their proof contains a mistake. This paper corrects the computational mistake in Josephy-Aczel’s original proof and, that way, allows researchers and practitioners in the field of downside portfolio selection, hedging, downside asset pricing, risk measurement in a regulatory context, and performance measurement to work with a meaningfully specified downside measure.
Źródło:
Śląski Przegląd Statystyczny; 2019, 17 (23); 9-30
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk of failure in water main pipe network and of delivering poor quality water
Autorzy:
Boryczko, K.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/207264.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
risk analysis
water pipeline
water supply system
water distribution
quality water
analiza ryzyka
system zaopatrzenia w wodę
dystrybucja wody
jakość wody
rurociąg kanalizacyjny
rurociąg wodny
rurociąg wody zasilającej
rurociągi wody sieciowej
Opis:
The method of identifying areas of risk of failure in water pipe network has been presented including presentation and analysis of risk factors for failure in water main pipe network, the proposal of the method for identifying risk areas using a simulation model of the water distribution subsystems (WDS) operation, and an example of application. In the hydraulic model, the failures of main water pipes as well as the operation of the WDS in the case of contamination were simulated. The proposed method consists of preparing the so-called risk maps and the designation of areas in which the limit values for the identified risk, the first type and the second type according to the assumed risk categories (tolerated, controlled and unacceptable) were exceeded.
Źródło:
Environment Protection Engineering; 2014, 40, 4; 77-92
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Analysis of Vegetables Marketing in Rwanda, A case of carrots and cabbages produced in Rubavu District and supplied across the country
Autorzy:
Kubwimana, Jean Jacques
Powiązania:
https://bibliotekanauki.pl/articles/1892206.pdf
Data publikacji:
2020-07-08
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:
Risk, Risk analysis, Likert Scale, Marketing risk, Vegetable Marketing risk, and Risk Management.
Opis:
Due to the perishable nature and biological nature of the production process there is difficulty in scheduling the supply of vegetables to market demand. The vegetables are subjected to higher prices and quantity risks with changing consumers’ demand and production conditions. The core focus of this study was to reach, measure, and analyzing the marketing risk level of vegetables produced in Rubavu District, Rwanda. The study based on a survey of 90 vegetable sellers. At least 30 couple of wholesalers and middlemen visited Rubavu District to trade the vegetables for various retails. Primary data collected through structured questionnaires and secondary data sources used. A Five-point Likert associated with the bivariate analysis was used to rank the risk level while the full model of Linear Regression Analysis and factor analysis were used to identifier the majors’ factors associated with the risk in vegetable marketing in Rwanda. The mean score results derived based on Likert-Scales, indicated that “low seasonal product prices, weak market channels, poor logistics, and market communications, poor product handling and packaging, lack of storage and higher perishability’ identified to be the most important sources of risk. Therefore, the use of forwards’ contracts; getting market information, sell at crude prices due to perishability, contractual arrangements, maintaining good relationships and restoring the storage network system were of significant concerns for overcoming the recognized risks.  
Źródło:
Journal of Agribusiness and Rural Development; 2020, 56, 2; 183-200
1899-5241
Pojawia się w:
Journal of Agribusiness and Rural Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk to passengers and evaluation of the possibility of evacuation on high speed crafts
Autorzy:
Łozowicka, D.
Kaup, M.
Powiązania:
https://bibliotekanauki.pl/articles/360140.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
evacuation
high speed craft
safety
Opis:
The short specificity of high -speed passenger craft (HSC) and analysis of factors affecting the safety of such units is presented at the article. Normative documents relating to the HSC evacuation is also described. The purpose of this article is to analyze and evaluate the possibility of evacuation of passengers in emergency situations on HSC. This analysis was done on the example of a catamaran in accordance with regulation MSC/Circ.1166 given by IMO.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 39 (111); 100-106
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezpieczeństwo procesowe w obiektach przemysłowych
Risk analysis in industrial facilities
Autorzy:
Kozak, A.
Powiązania:
https://bibliotekanauki.pl/articles/403209.pdf
Data publikacji:
2011
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
analiza ryzyka
bezpieczeństwo
planowanie przestrzenne
cykl życia obiektu
risk analysis
safety
land-use planning
Opis:
Przedstawiono zasady oceny ryzyka instalacji przemysłowej w całym cyklu życia obiektu. Podano schemat decyzyjny w analizie ryzyka oraz sugestie dotyczące zastosowania technik analizy ryzyka. Wskazano na związek między bezpieczeństwem procesowym a planowaniem przestrzennym.
This article presents the methods of risk analysis of an industrial facility during its whole lifetime cycle. The document describes a decision diagram which is used in risk analysis and provides with suggestions concerning different methods applied in risk analysis. The article also explains a correlation between risk analysis and land-use planning.
Źródło:
Budownictwo i Inżynieria Środowiska; 2011, 2, 3; 319-322
2081-3279
Pojawia się w:
Budownictwo i Inżynieria Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A firm’s perspective on econophysics-based currency risk analysis
Autorzy:
Fiedor, Paweł
Hołda, Artur
Powiązania:
https://bibliotekanauki.pl/articles/950707.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
risk
exchange rate
predictability
econophysics
Opis:
In this article the authors presents an approach to quantifying currency risk based on the methodology of econophysics. This article continues the authors’ study into the currency risk, this time simplifying it for the purpose of rendering it useful for companies without technical abilities. A method of analysing the dependencies between currencies based on correlations is introduced to facilitate the analysis of currency risk involved in being exposed to one or more foreign currencies. Also a model estimating a risk-free horizon is introduced and tested against price formation models and empirical data from FX markets.
Źródło:
Financial Sciences. Nauki o Finansach; 2014, 4(21); 92-107
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk factors of positive peritoneal cytology in patients treated for gastric cancer – preliminary report
Autorzy:
Lisiecki, Radosław
Spychała, Arkadiusz
Peter, Katarzyna
Murawa, Dawid
Powiązania:
https://bibliotekanauki.pl/articles/1394263.pdf
Data publikacji:
2015
Wydawca:
Index Copernicus International
Tematy:
gastric cancer
peritoneal cytology
Opis:
Presence of free gastric cancer cells in the peritoneal cavity of patients who underwent surgical treatment for gastric cancer is a negative prognostic factor and caused rapid disease recurrence, manifested as peritoneal metastases. Positive peritoneal cytology despite lack of visible peritoneal metastases was regarded as M1 class in the TNM classification (7th edition) in 2010. The aim of the study was to analyze factors associated with positive peritoneal cytology and identify groups of patients in whom diagnostic laparoscopy plus peritoneal lavage in the diagnostic process could affect therapeutic decisions. Material and methods. The study enrolled patients with gastric cancer who underwent surgical treatment at the Department of Surgery, Wielkopolskie Oncology Center in Poznań. During the laparotomy, after opening of the peritoneal cavity, 200 ml of physiological saline at 37°C was administered in the tumor region. After this fluid was mixed, 100 ml of lavage fluid was collected. This fluid was subsequently spun many times to obtain sediment for cytology and immunohistochemistry investigation using anti-BerEp-4, CK 7/20, and B72.3. Results of peritoneal cytology were analyzed jointly with clinical factors – patient’s age, sex and pathology factors – tumor invasion, involvement of lymph nodes, histological grade, histological type according to Lauren and localization of the cancer in the stomach. Results. Analysis of the peritoneal fluid for presence of free cancer cells was done in 51 patients. Positive peritoneal cytology was found in 12 (23.5%) patients. In the group of patients with positive cytology, all patients had T3/T4 tumors and all were found to have lymph node metastases, while G3 cancer was found in 83.3% of patients. In patients with positive cytology, diffuse gastric cancer according to Lauren predominated (9 of 12 patients, 75%), while in patients with negative cytology – intestinal type (20 of 39 patients, 51.2%). In the group of patients with positive histology, the whole stomach was involved by the cancer process in 7 of 12 patients (58.3%), while in the group with negative histology, in 29 of 39 patients the tumor was located in the gastric body and prepyloric part (74.4%). Conclusions. Based on this study we can conclude that determinants of positive peritoneal cytology include: tumor stage T3/T4, N+, G3, cancer located in the whole stomach, diffuse histological type according to Lauren.
Źródło:
Polish Journal of Surgery; 2015, 87, 10; 506-512
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis for operating active wheelchairs in non-urban settings
Autorzy:
Sydor, Maciej
Krauss, Andrzej
Krauss, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/990867.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
independent living
preliminary hazard analysis (pha)
risk analisis
wheelchair
safety measures
spinal cord injury (sci)
Opis:
Introduction. A wheelchair is a special vehicle designed specifically for people with walking limitations. One of the types is an active wheelchair. This is a manually propelled wheelchair, the design and structure of which maximise the mobility of its given user at the expense of accepted instability. Objective. The aim of this study was to identify and present a hierarchy of potential incidents causing a health hazard and reducing the mobility of individuals with ambulatory disability who use active wheelchairs in non-urban settings. Materials and methods. Information about incidents connected with wheelchair use was collected from interviews with disabled individuals, based on a questionnaire. Recorded data were analysed using the Preliminary Hazard Analysis (PHA). Results. The results comprise a list of hazards for wheelchair user with ascribed priority numbers metrising their significance. Conclusions. An ordered list of hazards connected with wheelchair operation situations is useful when designing active wheelchairs and when learning the technique of wheelchair riding.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of matrix methods in flood risk analysis and assessment
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Zygmunt, A.
Powiązania:
https://bibliotekanauki.pl/articles/96196.pdf
Data publikacji:
2018
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
flood risk
risk matrix
flood losses
zagrożenie powodziowe
macierz ryzyka
straty powodziowe
Opis:
In the work the matrix methods of flood risk analysis and assessment were presented. Also the issue of flood risk in terms of its regulations was presented. The flood risk analysis and assessment were performed with the use of risk matrix for one of the Subcarpathian commune. For this purpose, flood risk maps were prepared and potential flood losses were calculated in accordance with existing legislation.
Źródło:
Ekonomia i Środowisko; 2018, 3; 8-24
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steam turbine maintenance planning based on forecasting of life consumption processes and risk analysis
Autorzy:
Rusin, Andrzej
Tomala, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/2172025.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
steam turbine
risk analysis
preventive maintenance
Opis:
Flexible operation of coal-fired power plants contributes to the intensification of the life consumption processes, which is a serious problem especially in the case of units with a long in-service time. In steam turbine rotors, the crack propagation rate and material wear caused by low-cycle fatigue increase. The aim of the research is an attempt to forecast the development of these processes and to estimate the probability of critical elements damage, such as the high-pressure and intermediate-pressure rotors. In the stress state analyses, the finite element method (FEM) is used, the Monte Carlo method and the second order reliability method (SORM) is apply to calculate the probability of failure. It is proposed to use risk analysis to plan preventive maintenance of the turbine. The optimal intervals for carrying out diagnostic tests and prophylactic repairs is determined for various operating scenarios and various failure scenarios. This enables a reduction of the costs while ensuring the safety of the turbine's operation.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 3; 395--406
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka w transporcie zbiorowym
Risk analysis in public transport
Autorzy:
Franek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/194049.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
transport zbiorowy
bezpieczeństwo
infrastruktura
zarządzanie
ryzyko
public transport
safety
infrastructure
management
risk
Opis:
Artykuł jest opisem propozycji budowy narzędzia do oceny ryzyka wystąpienia zdarzenia z udziałem pojazdów transportu zbiorowego, w odniesieniu do różnych elementów infrastruktury. Proponuje się poddać obserwacji kilkanaście najważniejszych czynników infrastrukturalnych, kształtujących zachowania użytkowników oraz oszacować prawdopodobieństwa wystąpienia na nich zdarzeń niebezpiecznych. Praktycznym wykorzystaniem wyników tego typu analizy zainteresowane mogą być miejskie zarządy dróg i transportu oraz operatorzy, dla których istotna jest możliwość wskazania konkretnych strat ekonomicznych. Narzędzie można będzie wykorzystać w procesie decyzyjnym na etapie inwestycji, modernizacji i eksploatacji. Podejście do zarządzania bezpieczeństwem w ścisłym powiązaniu z zarządzaniem jakością zostało zaczerpnięte z innowacyjnych metod stosowanych w przemyśle.
Article presents description of the measure estimating risk of accidents which may happen with participation of the public transport vehicles, with reference to different elements of infrastructure. It is proposed to observe dozen or so the most important infrastructure factors influencing users' behavior and to estimate probabilities of occurring dangerous cases in relation to them. Municipal transport and road boards and operators may be interested in practical usage of results of this type of analysis since possibility to find out specific economical loses is important for them. The measure may be used in the decision process of the investment, modernization and operation stages. Approach to the risk management in close relation to the quality management has been taken from innovative methods used in industry.
Źródło:
Transport Miejski i Regionalny; 2012, 6; 40-43
1732-5153
Pojawia się w:
Transport Miejski i Regionalny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Analysis and Human Factor in Prevention of CRG Casualties
Autorzy:
Kobylinski, L.
Powiązania:
https://bibliotekanauki.pl/articles/116985.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Risk Analysis
Human Factor
CRG Casualties
Ship Handling Research and Training Centre at Ilawa
Polska
Collision Avoidance
Collisions-Ramming-Groundings (CRG)
Safe Manoeuvres
Human and Organization Errors (HOE)
Opis:
CRG casualties create one of the major type casualties in shipping. Prevention of CRG casualties is an important issue, especially because of the number of CRG casualties has increased almost twice during recent years. For the great majority of all CRG casualties human factor responsible, and the increasing number of these casualties might be attributed to poorer qualifications of ship masters who have not enough experience in handling very large ships put into operation presently. Risk analysis is a modern method for assessment of safety level of technical systems. This tool may be the used to investigate causes of casualties and to find out most effective prevention measures. Risk analysis is widely used in many areas; in case of marine technology it is used routinely in off-shore technology. The author investigates possibilities to apply risk analysis in the area of ship handling with the focus on human factor. This is preliminary study where possible methodology for hazards identification and risk assessment in respect of CRG casualties are investigated and risk control options are suggested. Various aspects of the influence of human factor in collision avoidance are listed and in particular the effect of training is stressed.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 443-448
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Importance of Information in Crisis Management
Autorzy:
Kaczmarczyk, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1375100.pdf
Data publikacji:
2020
Wydawca:
Wyższa Szkoła Policji w Szczytnie
Tematy:
crisis situations
crisis management
risk analysis
Opis:
Threats have accompanied humanity since the dawn of time. Most of them can develop into crisis situations that can be interpreted in many different ways. The crisis situation is closely linked with the concept of crisis management, which is implemented in four phases. At every stage of work, various elements are significant in terms of crisis management. There are also elements that are very important at every stage. These include: threat analysis, estimation of the probability of their occurrence in a given area, and assessment of their sensitivity. An appropriate information flow system supports the implementation of the above elements. This system should be effective in such relations as between services and between services and society. The effectiveness of information flow depends on the reliability of this information and its flow channel. Information is of particular importance in the decision-making process. It should have appropriate features and properties. Based on the information, both good and bad decisions can be made. In crisis management, this can be relevant to human health and even human life. This article discusses issues related to the nature of information in crisis management.
Źródło:
Internal Security; 2020, 12(1); 85-95
2080-5268
Pojawia się w:
Internal Security
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ensuring Organisational Security from the Perspective of Security Sciences
Autorzy:
Płonka, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/1808093.pdf
Data publikacji:
2019-04-11
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
organisational security
control models
risk analysis
Opis:
This paper is dedicated to the topic of security in the context of activities carried out by organisations. The analysis of the security-related context of the enterprises, decisions and threats that often co-occur with organisational activities is an interesting challenge for a researcher. The aspiration to ensure their own survival and undisturbed development is the basic driving force behind all organisations. In the following paper, the author explains the meaning of basic terms connected with the aforementioned issues, such as uncertainty, risk and security. The models and dimensions of control are discussed consecutively, as well as the methods and techniques utilised in risk assessment. Control and risk analysis are currently the means of counteracting threats that is most commonly used in organisations. The aim of the paper is to carry out the review of the hitherto existing research stipulations regarding the sphere of organisational security. The author points out that the problem of organisational security, treated as a core research subject, may be successfully developed and elaborated within the framework of security sciences discipline.
Źródło:
Security Dimensions; 2018, 28(28); 122-140
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Substation reliability evaluation in the context of the stability prediction of power grids
Autorzy:
Borecki, M.
Ciuba, M.
Kharchenko, Y.
Khanas, Y.
Powiązania:
https://bibliotekanauki.pl/articles/199826.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reliability
power grid
risk analysis
substation
Opis:
The aim of the presented work was to examine the reliability assessment model on the example of a selected power grid object. The analyzed object was tested based on assumptions about technological breaks that were caused by overvoltage, among others. The study was conducted to check the reliability of integral elements of the power grid object and to assess the change in reliability level as a function of the frequency of inspections. The test results are to determine the optimal frequency of inspections of individual power grid objects in order to increase its reliability. In addition, the possibility of correlating optimal inspection periods resulting from the findings of this paper with periodic inspections of power network facilities was assessed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 769-776
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expressing and communicating uncertainty in relation to quantitative risk analysis (QRA)
Autorzy:
Flage, R.
Aven, T.
Powiązania:
https://bibliotekanauki.pl/articles/2069562.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
quantitative risk analysis
QRA
uncertainty
sensitivity analysis
decision support
Opis:
A quantitative risk analysis (QRA) should provide a comprehensive, informative and balanced picture of risk, in order to support decisions. To achieve this, a proper treatment of uncertainty is a prerequisite. Most approaches to treatment of uncertainty in QRA seem to be based on the thinking that uncertainty relates to the calculated probabilities and expected values. This causes difficulties when it comes to communicating what the analysis results mean, and could easily lead to weakened conclusions if large uncertainties are involved. An alternative approach is to hold uncertainty as a main component of risk, and regard probabilities as epistemic-based expressions of uncertainty. In the paper the latter view is taken, and we describe what should be the main pillars of a risk description following this approach. We also indicate how this approach should relate to decision-making. An important issue addressed is how to communicate the shortcomings and limitations of probabilities and expected values. Sensitivity analysis plays a key role in this regard. An example is included to illustrate ideas and findings.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 109--115
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza przeżycia. Zagrożenie tlenową toksycznością ośrodkową. Cz. 3
Survival analysis. The risk of central oxygen toxicity. Part 3
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/1360555.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
survival analysis
risk assessment
analiza przeżycia
szacowanie zagrożenia
Opis:
Analiza przeżycia zajmuje się modelowaniem statystycznym przebiegów czasowych, dla których interesujące są czasy trwania pomiędzy wybraną chwilą a oczekiwanym zdarzeniem. Zdarzenie to nazywane jest rezultatem lub punktem końcowym. Dane do analizy przeżycia mogą być także traktowane, jako czas do zaistnienia zdarzenia, czas przeżycia, czas do awarii, czas niezawodności, czas trwania itp. Analiza takich danych jest ważna zarówno w medycynie 1, naukach społecznych 2 jak i w inżynierii 3. Analiza przeżycia znalazła tez zastosowanie w technice nurkowej [1]. W artykule zostały przedstawione podstawy analizy przeżycia, które posłużą do szacowania możliwości wystąpienia symptomów tlenowej toksyczności ośrodkowej przedstawione w części czwartej cyklu artykułów.
Survival analysis deals with statistical modelling of time elapsed between a particular moment and an expected event. The event is referred to as a result or an end point. The data used in survival analysis may also be treated as the time until an event occurs, time of survival, time until a failure, time of reliability, duration, etc. An analysis of such data is equally important for medicine 1, social sciences2 and engineering3. Survival analysis can also be applied to diving [1]. The article presents the basics of survival analysis which will serve in estimating the probability of an occurrence of central oxygen toxicity symptoms, which will be listed in the fourth part of the cycle of articles.
Źródło:
Polish Hyperbaric Research; 2014, 3(48); 33-48
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Risk of Burn Out at Workers in the Field of Social Services and Health Care
Autorzy:
Budayová, Zuzana
Ludvigh Cintulová, Lucia
Mrosková, Lenka
Powiązania:
https://bibliotekanauki.pl/articles/18668779.pdf
Data publikacji:
2023-06-20
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Burn out
signs of burn out
Social work
health care
Opis:
Aim. The aim of the research was to analyse the burnout rate of these social workers and nurses, as well as to determine the relationship between burnout syndrome and other important factors, including lifestyle, stress, resistance to stress and other selected demographic indicators. Methods. The Maslach Burnout Inventory was used to collect burnout data in 2021 during the second wave of the Covid-19 pandemic. The research sample consisted of 623 women aged 35-55 who work in social services facilities for the elderly and nurses working in the geriatrics department at a hospital in the western part of Slovakia. Results. Research has shown that lifestyle has a significant impact on the development of burnout syndrome in connection with the quality of work and personal relationships, which can help eliminate feelings of frustration, exhaustion and personal failure in the workplace. Burnout affects social workers regardless of age and education, but with older age and length of practice in the same facility, the risk of manifestations of burnout increases. Significant differences in burnout rates between social workers and nurses in the individual dimensions of exhaustion, depersonalisation and professional attitudes were confirmed. High levels of exhaustion have even shown an increased risk of alcohol consumption among these workers. Conclusion. The development of chronic stress in health care workers can put them at risk of burnout, which is characterized by emotional exhaustion (EE), depersonalization (DP) in interactions with patients and social clients, and low levels of personal accomplishment (PA) in social work and health care.
Źródło:
Journal of Education Culture and Society; 2023, 14, 1; 365-380
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to Estimate Security – Problem Analysis
Autorzy:
Pilarski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1807890.pdf
Data publikacji:
2020-06-30
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
security
estimation
risk analysis
political risk
forecasting
Opis:
Background: The article presents a method of estimating the security level which indicates how probable it is for a phenomenon to occur. Objectives: The author attempts to answer the question: How do we estimate security? Decision makers usually need percentage showing the probability of an incident taking place in the future. This information is needed in the first place, later decision makers can use more descriptive information. Methods: The research problem concerns the assessment of security using the estimation method. Depicting security in numbers is difficult, thus the descriptive method is also usually applied. The estimation method facilitates the assessment. It is helpful since it is partly done by calculation and partly by guessing or approximation. Based on a case study analysing whether a terrorist attack may occur, the author also used tools such as averaging expert predictions, scenario analysis and risk analysis. Results: This article provides a view on forecasting security, which results in a method of estimating the level of security. Conclusions: The author presents an approach which allows to initially estimate the security level of the analyzed phenomenon in a relatively short period of time.
Źródło:
Security Dimensions; 2020, 33(33); 217-240
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis on ship wreck and container cargo to ship navigation
Autorzy:
Zaman, M.B.
Pitana, T.
Iswantoro, A.
Aryawan, W.D.
Powiązania:
https://bibliotekanauki.pl/articles/117044.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ships manoeuvering
risk analysis
ship wreck
container
ship navigation
risk matrix
risk acceptance criteria
ship accidents
Opis:
Wreck of a ship is an incident that must be avoided. Ship accidents are generally caused by a several cases, such as human error, natural disaster, technical errors, missed communication, poor condition of the ship, and many more. Ship wreckage have huge impact for ship navigation, environment, economics, and others. Those impact have many disadvantages for the shipowners, and also for environment. For examples the fuel spills that pollute the environment, make disturbance to sailing ship because the track for those navigation is blocked by the ship wreck and their cargo especially on shallow location (<50 m). These research will discuss the effect the container when it is floats on the sea and its interference other ships. The main objective of this study is to present a risk assessment on the environmental impact of the wreck and container cargo. Wrecks on the seabed is likely to pose a risk to passing ships. container and its contents as well as the possibility of refloat, and also their environmental risks emanating from the wreck and container cargo, such as fuels, lubricants, and chemical cargo. Variations scenario is a collision between ships that pass by floating containers. The frequency of refloating container, and the consequences of the passing ship depends on several factors, which will be the subject of research. However, because of the frequency of refloating containers is unlikely, then the risk is low and does not pose a danger to navigation. These risk assessment using risk matrix 5x5 which is the combined value of the frequency and consequences of the incident. The results of this study indicate the level of risk, whether the risk is accepted, not accepted or received by considering the costs and benefits (ALARP). To consequence, there are two parameters which energy is absorbed and the penetration occurs. The absorbed energy is divided into two, namely the energy absorbed by ship and the energy absorbed by containers. In this study were taken 5 groups based on the size of the vessel. In this cases any 5 size group of vessels is based on the size of the ships that pass in the shipping lanes at the site of the sinking. Assumed these vessels have speed 10 knots at the location. As well as speed drifting containers having 0 to 3 knots.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 71-77
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zagrożenie wybuchem wodoru na okręcie podwodnym. Cz. IV, Prowadzenie projektów wysokiego ryzyka
The risk of hydrogen explosion in a submarine. Part IV, the implementation of high risk projects
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/1359799.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
ryzyko projektowe
analiza ryzyka w projekcie
metoda analizy ryzyka
project risk
project risk analysis
risk analysis methods
Opis:
W cyklu artykułów przedstawiono problematykę prowadzenia projektu dużego ryzyka na przykładzie modernizacji spalarek wodoru na okręcie podwodnym. W artykule opisano problemy zarządzania takim projektem.
This series of articles on high risk projects looks at the example of the modernisation of hydrogen incinerators on a submarine. The article describes problems connected with the management of such a project.
Źródło:
Polish Hyperbaric Research; 2017, 2(59); 7-56
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability and risk analysis of multi-state systems with degrading components
Autorzy:
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069716.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
multi-state systems
system reliability
system risk
Opis:
Applications of multi-state approach to the reliability evaluation of systems composed of independent components are considered. The main emphasis is on multi-state systems with degrading components because of the importance of such an approach in safety analysis, assessment and prediction, and analysing the effectiveness of operation processes of real technical systems. The results concerned with multi-state series systems are applied to the reliability evaluation and risk function determination of a homogeneous bus transportation system. Results on homogeneous multi-state “m out of n” systems are applied to durability evaluation of a steel rope. A nonhomogeneous series-parallel pipeline system composed of several lines of multi-state pipe segments is estimated as well. Moreover, the reliability evaluation of the model homogeneous multi-state parallel-series electrical energy distribution system is performed.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 2; 205--216
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of risk analysis in maintenance of ship power system elements
Autorzy:
Adamkiewicz, A.
Fydrych, J.
Powiązania:
https://bibliotekanauki.pl/articles/359078.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
technical risk
seagoing vessel
power system
maintenance strategy
Opis:
Searching for a safe ship, this paper presents operational strategies which are used for ship power system maintenance, conditions for their realization have been shown. The procedure of risk analysis has been decomposed and its stages have been discussed. Methods of risk evaluation and methods of ship power system threat identification have been analyzed. The choice of risk evaluation method has been made for the management of maintenance of elements of the system taking into account good maritime practice, ICM code, regulations of classification societies and international maritime organizations. Studies on possibilities of extending operational time of the engine from the main power system using risk analysis with the Expert Method have been presented. On the basis of the results of studies, applicability of the Expert Method for risk analysis on ships has been shown.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 5-12
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Several sets of assumptions for the Monte Carlo simulation for a more precise analysis of enterprise risk
Autorzy:
Kaczmarzyk, Jan
Powiązania:
https://bibliotekanauki.pl/articles/425026.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
corporate finance
risk analysis
Monte Carlo simulation
Opis:
The traditional methods of risk quantification include a sensitivity analysis, a scenario analysis and a historical simulation. The true nature of risk factors changes is ignored in the traditional ‘ceteris paribus’ approach to a sensitivity analysis, hence it can be reflected in a scenario analysis and a historical simulation. The most significant disadvantage of a scenario analysis is the limited number of scenarios, whereas a historical simulation depends on historical data availability and adequacy. The Monte Carlo simulation is a clear answer to the limitations of traditional methods. The changes of risk factors reflected in the Monte Carlo simulation are simultaneous, non-linear and interdependent. The most important aspect of this method is the stage of taking up the assumptions. The purpose of the paper is to indicate that considering several reasonable sets of assumptions for the Monte Carlo simulation simultaneously can bring even more comprehensive information about enterprise risk.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2019, 23, 4; 80-95
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Level of Risk and Decision-making in Managing Industrial Activity with the Elimination of Negative Environmental Impacts
Autorzy:
Végsöová, Oľga
Straka, Martin
Kyšeľa, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/1811590.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
risk
danger
threat
risk analysis
risk assessment
Opis:
This paper focuses on the assessment of the degree of risk in all phases of extraction activities in a selected quarry in the Slovak Republic. The research part of the paper assesses the degree of risk resulting from the assessment of the threat, the probability of the threat and the consequence of an adverse event in extraction activities. The paper offers an important basis for decision-making in quarry management in order to eliminate the negative consequences of andesite mining on the environment, equipment and people. The extraction activity in the Kecerovský Lipovec quarry is assessed by this paper as low risk for two phases of extraction, specifically the preparation phase, and the extraction itself. The paper also highlights the importance of taking measures. Regarding the safety criteria in the Kecerovský Lipovec quarry, it is possible, based on the results of the analysis and evaluation, to consider the quarry to be safe. However, a condition for this is the necessary expert training of workers in all activities performed while working in the quarry. Here, the need for personnel to strictly adhere to the set standards for extraction activities is of prime importance. This finding confirms the above that the aim of diagnosing and naming the potential for adverse events in the extraction process must be to minimize risks, as their absolute exclusion is not possible due to the human factor and unforeseeable circumstances.
Źródło:
Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 130-143
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for integrated Failure Risk Analysis of Water Network in terms of Water Supply System Functioning Management
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068882.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply system
failure indicators
risk analysis
Opis:
In the paper the issues connected with failure risk analysis related to the functioning of this system were presented. In the analysis of water supply system it is important to assess the safety of its operation, both from the producer and the consumer point of view. The paper presents the method of analysis of consumers acceptance of water costs that companies bear for the risk reduction. The proposed method can be the basis of comprehensive program of risk failure management and in decision-making on water supply operation.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 1; 157--166
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis of water supply interruptions in collective water supply systems
Autorzy:
Tchórzewska-Cieślak, B.
Rak, J. R.
Piegdoń, I.
Powiązania:
https://bibliotekanauki.pl/articles/2069330.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply
availability
risk management
value of water scarcity
water production subsystem
Opis:
The subject and main purpose of this study is to present the method of risk analysis and assessment of the lack of water supply to the collective water supply system (CWSS). Presented method using the expected value of water scarcity. The analysis was based on all possible states of the operation of water production subsystem. The article contains calculation example of analysis for the exemplary CWSS with regard to absolute risk, equal to the expected value of water scarcity and the relative risk referred to the nominal value of the water demand. In the example attached special importance to the criteria levels of the relative risk of lack of water supply. Presented method is a new concept which allows to make comprehensive analysis of reliability, safety and operation of the collective water supply system.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 2; 201--208
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk analysis method by the extreme data of dependent exogenous variables
Autorzy:
Tereshchenko, Ihor
Tereshchenko, Anton
Bilous, Nataliya
Shtangey, Svetlana
Warsza, Zygmunt L.
Powiązania:
https://bibliotekanauki.pl/articles/2141854.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
exogenous variable
risk-oriented process approach
extreme value theory
tailed distribution
Opis:
Many practical tasks of data multivariate statistical analysis from the standpoint of a risk-oriented process approach (in accordance with ISO 9001: 2015, 31000: 2018) requires the definition of the risk values for the dependent exogenous variables of some processes. This paper proposes the method, which consist of original stages sequence for calculating value-at-risk (VaR) or conditional-value-at-risk (CVaR) of dependent exogenous variables, presented of the extreme data frame of critical manufacture process parameters or other parameters, for example, extreme data of environmental monitoring and etc. Risk analysis method by the extreme data of dependent exogenous variables, presented of the data matrix, uses the result of solving the formalized problem of defines the tails parameters of the joint distributions of exogenous variables as components of a bivariate random variable. It can be argued that the tails parameters of the joint distributions of dependent exogenous variables make the validated corrections of the VaR and CVaR estimates for such variables. This method expands the practical application of extreme value theory for the value at risk analysis of any dependent variables as process parameters.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2021, 15, 3; 44-53
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seroepidemiological study of canine Leishmania infantum and Toxoplasma gondii infections in Shanghai, China, and analysis of risk factors
Autorzy:
Jiang, Wei
Wang, Yan
Liu, Yingchun
Li, Tao
Chen, Yongjun
Wang, Shaohui
Han, Xiangan
Wang, Quan
Powiązania:
https://bibliotekanauki.pl/articles/990968.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
seroprevalence
leishmania infantum
toxoplasma gondii
household dogs
risk factors
Opis:
The aim of this study was to determine the seroprevalence of Leishmania infantum and Toxoplasma gondii among household dogs in Shanghai (the most important industrial and commercial city in China), and to assess the possible risk factors associated with the infection. During 2014–2015, a total of 408 sera were collected from healthy household dogs and tested for L. infantum and T. gondii infection using commercial ELISA kits. The endemic characteristics according to gender, age group and breed were revealed by statistical descriptions and inference. The positive rates of L. infantum infection (24/408, 5.9%) were lower than those of T. gondii infection (37/408, 9.1%), and co-infection with both parasites was detected in seven dogs (7/408, 1.7%). Seropositivity for either parasite was more likely associated with age: the seroprevalence of T. gondii infection ranged from 1.3% (dogs≤1 year) – 18.7% (dogs>6 years), whereas that of L. infantum ranged from 1.3% (dogs≤1 year) – 9.9 % (dogs>6 years). Interestingly, the rates of exposure to both L. infantum and T. gondii were higher in males than in females. Relatively higher exposure rates for L. infantum and T. gondii were also observed in crossbred dogs compared with purebred dogs. However, neither gender nor breed is likely a determining factor for infection with these two parasites (P > 0.05). Identification of the risk factors that underlie these differences may help in the prevention of L. infantum and T. gondii infection in household dogs. To the best of our knowledge, this is the first report of L. infantum and T. gondii infection in household dogs in Shanghai, which shows that these two important parasites are still prevalent in this region. Therefore, it is necessary to take integrated strategies for prevention and control of infection in animals, which could help to reduce human infection in the region.
Źródło:
Annals of Agricultural and Environmental Medicine; 2016, 23, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Relation between Serious Incident and Accident in Air Traffic
Autorzy:
Skorupski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/504624.pdf
Data publikacji:
2010
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
traffic safety
air traffic management
risk analysis
Opis:
International aviation organizations require Poland to define the so-called acceptable level of safety for traffic accidents. To calculate this, one requires statistical data on accidents. These, however, in recent years did not occur, or the size of the sample is insufficient. In the paper a method for predicting the number of accidents on the basis of information on air incidents is mentioned. This method can be efficient and effective if any regular relation between the air traffic accident and serious incident exists. In the paper a way to find this relation is proposed, by analyzing the relevant simulation models of serious incidents and accidents. For this purpose Petri nets were used.
Źródło:
Logistics and Transport; 2010, 11, 2; 45-54
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zagrożenia powodziowego Kazimierza Dolnego
Flood risk analysis of Kazimierz Dolny
Autorzy:
Krawczyk, Przemysław
Całka, Beata
Bielecka, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/2174498.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Informacji Przestrzennej
Tematy:
powódź
ocena zagrożenia
model HEC-RAS
GIS
otwarte dane
Wisła
flood
risk assessment
HEC-RAS model
open data
Vistula
Opis:
Powodzie to jedna z najczęstszych i najbardziej niszczycielskich klęsk żywiołowych na świecie, które mają negatywny wpływ na ludzi, środowisko i gospodarkę. Artykuł ma na celu modelowanie i ocenę ryzyka powodziowego wykorzystując jednowymiarowy model HEC-RAS oraz otwarte dane udostępniane przez Główny Urzędu Geodezji i Kartografii. Obszar badań obejmuje Kazimierz Dolny położony nad Wisłą. Badania przeprowadzono w trzech etapach. Po pozyskaniu danych z numerycznego modelu terenu i elementów doliny rzecznej (np. przekrojów poprzecznych doliny) oraz opracowaniu warstwy szorstkości na podstawie wskaźników Manninga, wymodelowano wody wezbraniowe dla powodzi dziesięcio-, stu- i pięćset letniej. Analiza ryzyka wykazała, że powódź 100-letnia powoduje już dość znaczne szkody w dobrach ludzkich i kulturowych, a powódź 500-letnia znacznie je powiększa, niszcząc 2016 budynków i zalewając obszar o powierzchni niemalże 207 ha.
Flooding is one of the most frequent and devastating natural disasters in the world, generating negative impact to people, environment and economy. The paper aims in flood risk modelling and risk assessment based on one-dimensional HEC-RAS model and open data derived form the Head Office of Geodesy and Cartography. The research area covers the small historic city Kazimierz Dolny located on the Vistula River. The research was carried out in three stages. After digital elevation model and river valley elements (e.g. valley cross sections) data acquisition, as well as elaborating a roughness layer based on Manning's indicators, the ten-, one-hundred- and five-hundred-year floods water were modelled. The risk analysis showed that the 100-year flood is already causing quite significant damage to human and cultural assets, and the 500-year flood significantly increases it, destroying 2,016 buildings and flooding an area of almost 207 hectares.
Źródło:
Roczniki Geomatyki; 2022, 20, 4(99); 81--91
1731-5522
2449-8963
Pojawia się w:
Roczniki Geomatyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk factors of recurring non-specific low back pain with particular emphasis on “new” predictive factors
Autorzy:
Citko, Anna
Górski, Stanisław
Marcinowicz, Ludmiła
Górska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/552212.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
predictors
low back pain
recurring.
Źródło:
Family Medicine & Primary Care Review; 2017, 3; 201-208
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical analysis of flood risk factors
Analiza statystyczna czynników ryzyka powodziowego
Autorzy:
Asani, A.
Kołodziejczyk, U.
Powiązania:
https://bibliotekanauki.pl/articles/395874.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wały przeciwpowodziowe
lubuski odcinek Odry
czynniki ryzyka powodziowego
analiza statystyczna
Lubuskie Region
Oder river
flood protection
statistical analysis
Opis:
The durability of hydrotechnical structures, especially flood embankments, depends largely on the correct identification of natural phenomena occurring in both the embankment body and the foundation. Such a phenomenon - particularly important from a flood protection viewpoint – is water filtration through the embankment. It turns out that it can be effectively reduced by applying various types of anti-filtration barriers in the embankment fill material and the foundation. In the paper the results of statistical analysis of the impact of the sealing technology on the level of water in the piezometers (installed on both sides of the seal) and findings on the relationship between the water level height in a flood embankment area and the type of seal, and the period (month) of a given hydrological year are presented.
Trwałość budowli hydrotechnicznych, w tym szczególnie wałów przeciwpowodziowych, zależy w dużym stopniu od właściwego rozpoznania zjawisk naturalnych zachodzących zarówno w korpusie, jak i podłożu wału. Takim zjawiskiem – szczególnie istotnym z punktu widzenia ochrony przeciwpowodziowej – jest filtracja wody przez wał. Okazuje się, że można ją skutecznie ograniczyć poprzez zastosowanie w nasypie i podłożu wału różnego rodzaju przegród przeciwfiltracyjnych. W pracy przedstawiono wyniki modelowych badań wpływu technologii uszczelnienia na poziom wody w piezometrach (zainstalowanych po obu stronach uszczelnienia) i ustalenia zależności pomiędzy wysokością poziomu wody w rejonie wału przeciwpowodziowego i rodzajem uszczelnienia, a także okresem (miesiącem) danego roku hydrologicznego. Badania przeprowadzono na odcinku zlokalizowanym na prawym brzegu Odry w od 546,0 do 564,8 km jej biegu. W celu ograniczenia filtracji wody przez wał i zmniejszenia ryzyka wystąpienia powodzi w rejonie, w ramach prac modernizacyjnych, na przedmiotowym odcinku wałów, zostały zainstalowane cztery różne technologie uszczelnienia: a) folia PVC uszczelniająca korpus wału, b) folia PVC uszczelniająca korpus wału połączona ze ścianką szczelną C-LOC uszczelniającą podłoże wału, c) bentomata uszczelniająca korpus wału, d) bentomata uszczelniająca korpus wału, lokalnie połączona ze ścianką ilastą uszczelniającą podłoże wału. Otrzymane wyniki badań wskazują na możliwość ograniczenia filtracji wody przez wał poprzez zastosowanie różnych ekranów przeciwfiltracyjnych oraz opisują zależność pomiędzy technologią uszczelnienia, okresem w roku hydrologicznym a poziomem wody w rejonie wału.
Źródło:
Civil and Environmental Engineering Reports; 2011, 7; 109-118
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected risk factors in trade fair decisions of exhibitors
Autorzy:
Proszowska, Anita
Powiązania:
https://bibliotekanauki.pl/articles/105620.pdf
Data publikacji:
2019
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
trade fairs
exhibitor
stakeholders
B2B
targi
wystawcy
interesariusze
Opis:
In the process of managing participation in fairs, a long-term vision, taking into account a number of non-financial dimensions of the assessment, makes it more complex and risky and, consequently it requires more attention. The article presents the parameters of the process of managing participation in fairs by the exhibitors studied, analyses the relationships between them and identifies key risk factors in trade fairs activity of exhibitors. The article describes the respondents' behaviours in the studied area and highlights the importance of non-financial elements determining the readiness of exhibitors to participate in the fair. The decisions to participate in fairs are more and more often made based, for example, on the assessment of cooperation with organizers. The possibility of achieving non-sales goals during the event is also becoming more and more important, even if the company has difficulty assessing the degree of their implementation.
Źródło:
Acta Innovations; 2019, 33; 20-27
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja eksploatacji maszyn i urządzeń
Asset maintenance optimization
Autorzy:
Pietrzyk, A.
Uhl, T.
Powiązania:
https://bibliotekanauki.pl/articles/328254.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
RCM
analiza ryzyka
krytyczność
risk analysis
criticality
Opis:
W pracy wskazano możliwości optymalizacji decyzji eksploatacyjnych dzięki adaptacji metodologii RCM (ang. Reliability-Centered Maintenance), która poprzez integrację wielu dyscyplin nauki i techniki pozwala na efektywne technicznie i ekonomicznie planowanie działań serwisowych z uwzględnieniem warunków eksploatacji oraz oczekiwań użytkowników. RCM jest obecnie najpopularniejszą i najbardziej efektywną strategią zarządzania serwisem. Podstawy RCM zostały stworzone w latach 60-tych w przemyśle lotniczym USA. Dzięki serwisowi niezawodnościowemu uzyskano zmniejszenie kosztów eksploatacji samolotów przy jednoczesnej poprawie poziomu bezpieczeństwa lotów. Zaletą analizy RCM jest to, że może być przeprowadzona zarówno dla obiektów nowych jak i istniejących, a nawet już na etapie projektowania. W pracy przedstawiono propozycję oprogramowania ułatwiającego przeprowadzenie takich analiz oraz umożliwiającego wykonanie symulacji techniczno-ekonomicznych efektów proponowanych decyzji.
This paper presents possibilities of maintenance optymization with applying Reliability-Centered Maintenance based Methodology. RCM is a strategy that allow technically and economically effective maintenance task scheduling with respect to the users expectations in existing operating context. RCM is at moment the most popular and effective asset management strategy. RCM was developed over a period of thirty years in aviation industry. Applying RCM based techniques decreases flying costs and increases safety level. One of the benefits of RCM analysis is that it can be perform on the new or existing assets. RCM analyse can be applied even in the design phase. This publication presents software that assists in the analysis process, and allows to make economical symulations.
Źródło:
Diagnostyka; 2002, 26; 29-36
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic analysis and risk assessment in the process of implementing innovative products on the example of impregnated grinding wheels
Autorzy:
Gierszewska, Emilia
Nadolny, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/95217.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
innovation
implementation
economic analysis
implementation risk analysis
impregnated grinding wheels
innowacja
wdrożenie
analiza ekonomiczna
analiza ryzyka
impregnacja
ściernice
Opis:
This article presents issues related to the search for new products. The process of innovation implementation in a production company is characterized. Issues related to the process of innovation implementation are presented, as well as processes closely related to it. There are presented the analyses which are necessary to carry out, before starting the process of innovation implementation in a company. The process of economic analyses and risk assessment of FMEA implementation was discussed. The analyses presented refer to a specific example which is the implementation of innovative impregnated wheels in the company Andre Abrasive Articles.
Źródło:
Journal of Mechanical and Energy Engineering; 2019, 3, 4; 289-294
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of implementation of technologically advanced evacuation models on the process of decreasing the risk during accidents in an LNG terminal
Autorzy:
Stanković, G.
Petelin, S.
Vidmar, P.
Perkovič, M.
Powiązania:
https://bibliotekanauki.pl/articles/375466.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
LNG
risk analysis
evacuation model
analiza ryzyka
Opis:
The continuing growth of the LNG (liquid natural gas) industry has led to a rapid increase in the construction of LNG terminals and the need for accurate risk assessment models as accidents involving LNG are potentially hazardous and pose a major threat. One aspect of risk modeling - evacuation of people to the safe zones of an LNG terminal - is a complex problem that has yet to receive sufficient attention. The aim of this paper is to illustrate how the implementation of a technologically advanced evacuation model may decrease risk during potential accidents in an LNG terminal.
Źródło:
Transport Problems; 2017, 12, 1; 25-38
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management of Change as a Part of Caring about Safety
Autorzy:
Ferjencik, M.
Cardoso Anastacio, A.
Powiązania:
https://bibliotekanauki.pl/articles/357944.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
accident prevention
risk analysis
LOPA
organizational change
Opis:
No plant, including those manufacturing explosives or explosive articles, remains unchanged during its lifetime. But it is also known that changes − revisions in the original design − quite often contribute to adverse events. Operators therefore need to know how to manage the modifications safely, not increasing the danger for the operation, its employees or its surroundings. This article describes two accidents in the explosives manufacturing industry that were caused by a deficiency in the management of change. For both cases, a possible way as to how the accidents could have been prevented using proper management of the change procedure, based on risk analysis, is described.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 2; 469-486
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of tank safety with propane-butane on LPG distribution station
Autorzy:
Krzysiak, Z.
Samociuk, W.
Bartnik, G.
Plizga, K.
Dziki, D.
Kaliniewicz, Z.
Nieoczym, A.
Wyciszkiewicz, A.
Otto, T.
Powiązania:
https://bibliotekanauki.pl/articles/778817.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
safety valve
risk analysis
emergency scenarios
LPG
Opis:
An analysis of the risk of failure in the safety valve – tank with propane-butane (LPG) system has been conducted. An uncontrolled outflow of liquid LPG, caused by a failure of the above mentioned system has been considered as a threat. The main research goal of the study is the hazardous analysis of propane-butane gas outflow for the safety valve – LPG tank system. The additional goal is the development of an useful method to fast identify the hazard of a mismatched safety valve. The results of the research analysis have confirmed that safety valves are basic protection of the installation (tank) against failures that can lead to loss of life, material damage and further undesired costs of their unreliability. That is why a new, professional computer program has been created that allows for the selection of safety valves or for the verification of a safety valve selection in installations where any technical or technological changes have been made.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 4; 99-102
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka na rynku Nord Pool Spot
Risk Analysis on the Nord Pool Spot
Autorzy:
Ganczarek-Gamrot, Alicja
Krężołek, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/589891.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza ryzyka
Analiza wartości zagrożonej
Rynek energetyczny
Ryzyko inwestycyjne
Energy market
Investment risk
Risk analysis
Value at Risk Analysis
Opis:
The aim of this paper is the analysis of risk on Scandinavian energy market: Nord Pool Spot. The analysis is based on Value-at-Risk and Expected Shortfall. As the normality assumption for linear returns of prices has been rejected, the alternative distribution has been proposed: the alpha-stable distribution. The results shown that there are some differences between risks among submarkets of Nord Pool Spot. Moreover, the alpha- stable distribution better approximate real Value-at-Risk than normal one only if quantiles of order 0,05 and 0,95 are considered.
Źródło:
Studia Ekonomiczne; 2014, 192; 44-58
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainties on risk analysis : the consequence assessment in an hydrogen refuelling station
Autorzy:
Carpignano, A.
Ganci, F.
Powiązania:
https://bibliotekanauki.pl/articles/2069552.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
uncertainty
risk analysis
hydrogen
consequence analysis
hydrogen refuelling station
Opis:
The paper concerns the problem of uncertainty associated to risk analysis of complex technological systems; this problem is not easy to resolve and manage. This is because such uncertainty has never been simple to quantify and, despite several innovative techniques able to properly manage uncertainties are available, none of these methodologies is integrated on the risk analysis in order to evaluate the error propagation. Also the itself risk analysis is not a precisely defined procedure but rather a complicated process of several parts and, moreover, each part is characterized by its own uncertainty. Several studies highlighted as the phases which mainly contribute to the overall uncertainty of a risk analysis are consequence and vulnerability studies. In order to provide a signifying approach to the problem, the working team has decided to focus their attention on a very important target for population safety: the hydrogen refuelling station for automotive.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 93--100
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The meaning of geostatistical research in the light of the concept of assessing values of lignite deposits
Autorzy:
Pactwa, K.
Woźniak, J.
Powiązania:
https://bibliotekanauki.pl/articles/88966.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
geostatistics
lignite
mining
power engineering
risk analysis
Opis:
The article presents the role of geostatistical research in identification (and minimization) of a geological risk against the background of the concept presented, aiming at assessing the value of lignite deposits from the perspective of integrated entities, i.e. mines and power stations. A detailed review of the solutions in geostatistics is to prove their usefulness and convince about the purposefulness of their application. The issue of optimization of sampling the deposit is important in defining its value, and at the same time its future development. In addition, on each stage of the chain of creating the value, the areas were defined of uncertainties and a number of risk which are attached with reference to the solution proposed of assessing the deposit value.
Źródło:
Mining Science; 2015, 22, Special Issue 2; 105-112
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka na Towarowej Giełdzie Energii
Risk Analysis on Polish Power Exchange
Autorzy:
Ganczarek-Gamrot, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/590398.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza ryzyka
Energia elektryczna
Giełdy towarowe
Handel gazem
Ocena ryzyka
Rynek energetyczny
Ryzyko rynkowe
Commodity exchange
Electric power
Energy market
Gas trade
Market risk
Risk analysis
Risk assessment
Opis:
Celem pracy jest przeprowadzenie analizy porównawczej ryzyka zmiany ceny oraz wolumenu obrotu na rynku energii elektrycznej oraz rynku gazu prowadzonych przez Towarową Giełdę Energii. W pracy została przeprowadzona analiza rozkładów stóp zwrotu z omawianych rynków, na podstawie której zaproponowano miary estymacji ryzyka. Na bazie oszacowanego ryzyka zostanie przeprowadzona analiza porównawcza poziomu ryzyka na poszczególnych rynkach.
The aim of this paper is to carry out a comparative risk analysis of price and volume changes between electric energy contract prices and natural gas contracts quoted on Polish Power Exchange. On both markets prices are quoted continuously, and in fixings. In this paper the distribution of rates of return from both markets is analyzed. Based on this analysis, measures for estimating risk of price changes are proposed.
Źródło:
Studia Ekonomiczne; 2014, 208; 19-30
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cybersecurity Risk Analysis and Threat Assessment Within Smart Electrical Power Distribution Grids
Autorzy:
Czechowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/410579.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
smart power grid
digital security
risk analysis
hazard valuation
cyber-physical security
Opis:
Development Of Electrical Power Systems And Their Integration With An Increasing Number Of Smart Automation Devices Compel To Undertake A New Approach To The Issue Of The System’s Security. Reliability Of An Electrical Power System And High Service Availability Are The Essential Characteristics Of Efficient Strategic Electricity Customers, I.E.: Large Industrial Facilities, Railway Transport, Medical Service Providers And Life-Saving Institutions. The Time Of Manual Or Automatic System Recovery After A Failure, Which Increases Its Security, Is Not Without Significance, Either. The Article Discusses The Issues Of Risk Assessment And Management, Including The Overall Process Of Analysis And Assessment Of Threat Probability In Electrical Power Systems.
Źródło:
Present Problems of Power System Control; 2016, 7; 19-28
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Analysis of 31 Risk Estimation Tools Applied to Safety of Machinery
Autorzy:
Gauthier, F.
Lambert, S.
Chinniah, Y.
Powiązania:
https://bibliotekanauki.pl/articles/90949.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
risk assessment
risk estimation tools
safety of machinery
Opis:
This article studies differences in the results of using different risk estimation tools in the same hazardous situations involving dangerous machinery. We investigated how (a) types of risk estimation parameters and methods of constructing tools, (b) the number of levels of each parameter, and (c) the number of risk levels influence the results. Consequently, 31 risk estimation tools were compared by using them to estimate risk levels associated with 20 hazardous situations. Risk estimation appears to be tool-dependent, as different tools give different results with identical hazardous situations. The scope of the tool, its use, and construction could explain these differences. This article also proposes a series of rules for constructing tools to alleviate many problems associated with the variability of risk estimations.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 245-265
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza ryzyka i zarządzanie bezpieczeństwem funkcjonalnym
Risk analysis and functional safety management
Autorzy:
Kosmowski, K. T.
Powiązania:
https://bibliotekanauki.pl/articles/2069721.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
analiza ryzyka
zarządzanie niezawodnością
zarządzanie bezpieczeństwem
bezpieczeństwo funkcjonalne
analiza kosztów i korzyści
risk analysis
reliability management
safety mamagement
functional safety
cost-benefit analysis
Opis:
This article addresses current issues concerning the risk analysis and functional safety management. Some cost-benefit analysis methods (CBA) are presented oriented on optimizing the safety-related solutions on example of functional safety technologies reducing risk based on programmable systems E/E/PE (PN-EN 61508) and SIS (PN-EN 61511). The importance of safety-related criteria, such as tolerability of risk (TOR) in the context of cost-benefit analysis (CBA), is emphasized to reach rational decisions as regards safetyrelated solutions to be sufficiently reliable, safe and preferably economically justified.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 3; 9--16
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forecasting currency risk in an enterprise using the Monte Carlo simulation
Autorzy:
Kaczmarzyk, Jan
Powiązania:
https://bibliotekanauki.pl/articles/949105.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
corporate finance
financial risk
risk analysis
Monte Carlo
Opis:
A non-financial enterprise with receivables or liabilities denominated in a foreign currency is exposed to currency risk. Wanting to calculate a financial reserve in order to secure its receivables or liabilities, an enterprise can introduce the concept of the value at risk. To determine value at risk, an enterprise has to know the probability distribution of the future value of the receivable or the liability for a specific moment in future. Using a geometric Brownian motion to reflect exchange rate changes is among the possible solutions. The aim of the paper is to indicate that using the Monte Carlo simulation for forecasting the currency risk of an enterprise is a clear, easy-to-implement and flexible in terms of the assumptions approach. The flexibility of the Monte Carlo approach relies on the possibility to take up the assumption that the currency position changes caused by currency fluctuations have an other than normal probability distribution.
Źródło:
Financial Sciences. Nauki o Finansach; 2018, 23, 4; 50-62
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Concept of Models for Supply Chain Speculative Risk Analysis and Management
Autorzy:
Klosa, Edyta
Powiązania:
https://bibliotekanauki.pl/articles/522553.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Ocena ryzyka
Ryzyko w biznesie
Zarządzanie logistyczne
Zarządzanie łańcuchem dostaw
Zarządzanie ryzykiem
Business risk
Logistic management
Risk assessment
Risk management
Supply Chain Management (SCM)
Opis:
The article offers information on the risk management and analysis in business. Topics of discussion included were supply chain management, risk analysis at marketing, administration and information level and the increase of the importance of risk management in contemporary organizations. It mentions that the rational risk management approach should be based on three cardinal rules including maximizing expected opportunities, avoiding threats, and ignoring less probable possibilities.
Źródło:
Journal of Economics and Management; 2013, 12; 45-59
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zachowania organizacyjne mikroprzedsiębiorstw w warunkach kryzysu
Autorzy:
Janczewska, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/2109864.pdf
Data publikacji:
2013-12-28
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
micro enterprises
management
crisis
analysis of risk
mikro przedsiębiorstwo
zarządzanie
kryzys
analiza ryzyka
Opis:
Kryzys uważany jest obecnie za zjawisko ekonomiczne na trwałe wpisane w działalność przedsiębiorstw. Analiza zjawisk kryzysowych w zarządzaniu przedsiębiorstwem prowadzi do wskazania źródeł i przyczyn jego powstawania. Mogą one leżeć wewnątrz przedsiębiorstwa, jak również pochodzić z jego otoczenia. Teorie powstałe na gruncie zainteresowania badaczy dotyczą metod identyfikacji przyczyn oraz wpływu kryzysu na przedsiębiorstwo. Duże firmy i korporacje posiadają wypracowane modele analizowania sygnałów zbliżającego się kryzysu oraz procedury określające zasady postępowania w warunkach kryzysu. Mikroprzedsiębiorstwa nie mają wystarczającej wiedzy oraz menedżerów, którzy są w stanie dostrzec zbliżający się kryzys oraz sformułować zalecenia zapobiegające jego rozwojowi. Celem artykułu jest prezentacja zachowań organizacyjnych mikroprzedsiębiorstw w warunkach kryzysu. Przedstawione zostały w nim badania własne zachowań mikroprzedsiębiorstw na podstawie branży cukierniczej. 
Crisis, as an economic phenomenon, has always accompanied enterprises. The causes of crisis can be both internal, and external in relation to companies. Numerous theories exist, based on the interests of researchers, concerning the methods of identifying the reasons of crises, and measuring their influence on businesses. Examples of companies that failed to cope with a crisis confirm the thesis that a crisis may affect every enterprise. Large companies possess prepared models, for analysing the signals of an approaching recession. Micro enterprises are equipped with neither the knowledge, nor the managers, to formulate procedures of preventing the development of a crisis. The aim of this article is to present the organizational behaviours of micro enterprises in crisis situations. These are shown on the basis of the author’s proprietary research of micro enterprises, on the example of the women-clothing branch.
Źródło:
Przedsiębiorczość - Edukacja; 2013, 9; 112-122
2083-3296
2449-9048
Pojawia się w:
Przedsiębiorczość - Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk Analysis of Trans Papua Corridor Road Infrastructure Development in West Papua and Papua Province of Indonesia
Autorzy:
Rizal, Achmad
Junianto, Junianto
Sahidin, Asep
Zaida, Zaida
Powiązania:
https://bibliotekanauki.pl/articles/1075463.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Impact
Probability
Risk Analysis
Trans Papua
West Papua
Opis:
Trans Papua corridor highway is now an important highway, predictable way Trans Papua will experience overcapacity in the future. To overcome this situation the trans-Papua road building is planned. The investment of highway construction will always be involved in risk with certain scale, it is necessary to do the risk analysis. The purpose of this study is to identify and analyze the risk, measuring of risk probability point and risk impact and risk test by performing simulations using @Risk For Excel software. This research was conducted using a survey method and interview with respondents. The survey was conducted in three phases, namely: beginning survey, preliminary survey and detailed survey. Based on research conducted identified four risk factors are financing risk, construction risk, equipment risk and force majeure. These four risks are identified in the medium risk category. The influence level of risk impact to the increase of construction investment budget plan trans-Papua roads as a whole amounted to 8.07% (IDR. 1,183 trillion equivalent to USD 82,684 million) with risk factor for 0,549 then classified as medium risk. While detaily 15% (IDR. 2,194 trillionequivalent to USD 153,346 million) by a factor of 0.685 then risk being classified as at risk. The most sensitive risk is the risk of Construction.
Źródło:
World Scientific News; 2019, 126; 261-275
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the increase of construction costs in urban regeneration projects
Autorzy:
Apollo, M.
Miszewska-Urbańska, E.
Powiązania:
https://bibliotekanauki.pl/articles/103227.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
risk analysis
cost management
urban regeneration
cost increase
Opis:
The subject of this paper is the analysis and evaluation of the reasons for construction costs increases in urban regeneration projects. The analysis considers major refurbishments of real estates’, as well as heavy repair and modernization of the road system. For the period mentioned, the costs from works and expenditure schedules were compared with the costs of additional works, which shows the percentage cost increase in relation to initial project budget assumptions of the case study. The analysis revealed that due to difficulties in assessing technical state of inhabited buildings, the investor and potential contractor should pay special attention to the character of issues presented in this paper, taking into account an increased risk of their occurrence.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 28; 68-74
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the collective water supply systems in crisis situations
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069376.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
collective water supply system
crisis situation
critical infrastructure
Opis:
Risk is a basic category to estimate water supply system safety. The first step in risk assessment is to identify the threats and their possible consequences. One of methods for risk assessment is the method using the socalled risk graphs. It relies on the preliminary analysis of such risk factors as: the frequency of threat occurrence – F, the duration of the risk exposure – E, the size of the possible consequences – C and a degree of protection – O, that is inversely proportional to the mentioned measures of risk. The route along the branches of the risk graph should be started from the determination of the initiating/peak event which is the undesirable event (e.g. secondary water contamination in water-pipe network). The expanded risk graph presented in the work differs from the standard (commonly used) graph because it takes into consideration all combinations of the particular risk factors.
Źródło:
Journal of Polish Safety and Reliability Association; 2013, 4, 1; 129--136
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Easy Risk Assessment for Unmanned Aircraft Systems: Outline of the Method
Autorzy:
Wyszywacz, Wiktor
Powiązania:
https://bibliotekanauki.pl/articles/36783950.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
easy risk assessment
UAS
safety
threats
risk analysis
Opis:
The key element of safety systems in air transport is risk management. The rules for the safety of unmanned aircraft system (UAS) operations are established by the Commission Implementing Regulations (European Union [EU]) and national regulations. Risk assessment is the foundation of all activities. The broadest scope is covered by the special category of flights for which the Joint Authorities for rulemaking on Unmanned Systems (JARUS) developed the Specific Operations Risk Assessment (SORA) analysis. The primary purpose of the SORA analysis is to create a comprehensive safety portfolio, which is attached to the National Aviation Authority (NAA) application for permission to perform specific category flights. Aviation authorities may accept the use of other risk analysis methods to demonstrate risk reduced to a safe level. Easy Risk Assessment (ERA) for UASs is an attempt to determine the risk for UAS flights in a simple way by considering a range of factors influencing risk management in a similar way to the SORA. It is an uncomplicated method, which determines threats and their sources, provides risk management, and allows the determination of the level of risk tolerance. The ERA is intended to be an alternative to the SORA methodology for those looking to carry out risk assessment.
Źródło:
Transactions on Aerospace Research; 2022, 3 (268); 32-47
0509-6669
2545-2835
Pojawia się w:
Transactions on Aerospace Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examples of Migration Matrices Models and their Performance in Credit Risk Analysis
Autorzy:
Grzybowska, U.
Karwański, M.
Orłowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1408978.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.50.Ga
87.55.N-
02.10.Yn
Opis:
Credit risk models used in banks are based on probability models for occurrence of default. A vast class of the models used in practice (e.g., Credit Metrics) is based on the notion of intensity. In 1997 Jarrow applied Markov chain approach to analyze intensities. The key problem that arises is the selection of appropriate estimators. Within the Markov approach among the most frequently used estimators of a migration matrix are cohort and duration estimators. Migration matrices can also be obtained with help of statistical longitudinal models (GLMM) in which states (rating classes) in discrete time points are regarded as matched pairs. In this paper we compare Markov chain models and GLMM models and the influence of their application on bank portfolio evaluation.
Źródło:
Acta Physica Polonica A; 2012, 121, 2B; B-40-B-46
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic control of ship motion conducting search in open waters
Autorzy:
Kula, Krzysztof Stefan
Powiązania:
https://bibliotekanauki.pl/articles/1573705.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
computer control
IMC control
safety and risk analysis
Opis:
In this work a search operation support system is presented, which is an additional autopilot function block. Its task is to lead a vessel included in the search by the SAR services to the datum position on the basis of the data entered by the operator into the system and then automatically to search the indicated area according to the newly defined search pattern. The set goal can be achieved thanks to the autopilot that guides the ship along a given trajectory consisting of straight lines and arcs. High control accuracy is provided by the IMC control system using a relatively simple non-linear ship model. The simulation tests of the tanker model confirmed that the indicated search area can be precisely checked in a shorter time than when using the expanding square search pattern.
Źródło:
Polish Maritime Research; 2020, 4; 157-169
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of information security management system in the small healthcare organization
Autorzy:
Tupa, J.
Steiner, F.
Powiązania:
https://bibliotekanauki.pl/articles/309451.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
information security management
personal data protection
risk analysis
Opis:
The contribution describes the scope and main subject designed within DIGI-Q project. The paper contains results from subprojects of information security management system (ISMS) implementation, managed by students of DIGI-Q course. Very interesting simple risk assessment method and risk management and their application within in small healthcare organization were developed. Criteria and procedures accepted are described.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 2; 52-58
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation-Based Risk Analysis of Maritime Transit Traffic in the Strait of Istanbul
Autorzy:
Ozbas, B.
Or, I.
Uluscu, O. S.
Atiok, T.
Powiązania:
https://bibliotekanauki.pl/articles/117473.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Risk Analysis
Strait of Istanbul
Maritime Transit Traffic
Traffic Rules
Traffic Regulations
risk assessment
Simulation-Based Analysis
safety at sea
Opis:
In this manuscript, development and preliminary results of a simulation based risk modeling study for the Strait of Istanbul is presented. The goal of this research is to analyze the risks involved in the transit vessel traffic in the Strait of Istanbul. In the first step of the study, the transit vessel traffic system in the Strait of Istanbul has been investigated and a simulation model has been developed. The model gives due consideration to current traffic rules and regulations, transit vessel profiles and schedules, pilotage and tugboat services, local traffic, meteorological and geographical conditions. Regarding risk assessment, two sets of factors are used to evaluate the risk of accident in the Strait: the proba-bility of an accident and its potential consequences, as estimated and evaluated at various points along the Strait. Experience has shown that maritime accident occurrences can be very dissimilar from one another and therefore, probabilistic analysis of accidents should not be done independent of the factors affecting them. Thus, in this study, we have focused on the conditional probability of an accident, under a given setting of various accident causing factors. Unfortunately, historical accident data is by far insufficient for a proper sta-tistical consideration of all possible settings of these factors. Therefore, subject-expert opinion is relied upon in estimating these conditional accident probabilities. Assessment of the consequences of a given accident (in terms of its effects on human life, traffic efficiency, property and environment) was also accomplished using a similar approach. Finally, by integrating these assessments into the developed simulation model, the risks observed by each vessel at each risk slice are calculated in regard to the natural and man-made conditions surrounding. A sce-nario analysis is performed to evaluate the characteristics of the accident risk as the vessel moves along the Strait. This analysis allows us to investigate how various factors impact risk. These factors include vessel ar-rival rates, scheduling policies, pilotage service, overtaking and pursuit rules, and local traffic density. Policy indications are made based on the results of these scenarios.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 295-300
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Normy, stardardy, modele i zalecenie w zarządzaniu bezpieczeństwem
NORMS, STANDARDS, MODELS AND RECOMMENDATIONS FOR INFORMATION SECURITY MANAGEMENT
Autorzy:
Kreft, Karol
Powiązania:
https://bibliotekanauki.pl/articles/419224.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Gdański. Wydział Ekonomiczny
Tematy:
information
security management systems
risk analysis
security models
Opis:
Information is the factor which can decide about the potential and market value of a company. An increase in the value of intellectual capital of an information-driven company requires development of an effective security management system. More and more often companies develop information security management systems (ISMS) based on already verified models. In the article, the main problems with management of information security were discussed. Security models were described, as well as the risk analysis in information security management.
Źródło:
Współczesna Gospodarka; 2010, 1, 1
2082-677X
Pojawia się w:
Współczesna Gospodarka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fault tree-based approach for aviation risk analysis considering mental workload overload
Autorzy:
Che, Haiyang
Zeng, Shengkui
You, Qidong
Song, Yueheng
Guo, Jianbin
Powiązania:
https://bibliotekanauki.pl/articles/2038044.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
risk analysis
human error
mental workload overload
multiple resources model
fault tree analysis
Opis:
Many lives and aircrafts have been lost due to human errors associated with mental workload overload (MWLOL). Human errors are successfully considered in existing Fault Tree Analysis (FTA) methods. However, MWLOL is considered through Performance Shaping Factors indirectly and its information is hidden in FT construction, which is not conducive to analyze the root causes of human errors and risks. To overcome this difficulty, we develop a risk analysis method where Multiple Resources Model (MRM) is incorporated into FTA methods. MRM analyzes mental workload by estimating the resources used during performing concurrent tasks, probably including abnormal situation handling tasks introduced by basic events in FT. Such basic events may cause MWLOL and then trigger corresponding human error events. A MWLOL gate is proposed to describe MWLOL explicitly and add these new relationships to traditional FT. This new method extends previous FTA methods and provides a more in-depth risk analysis. An accident, a helicopter crash in Maryland, is analyzed by the proposed method.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 4; 646-658
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CIPRNet Decision Support System: Modelling Electrical Distribution Grid Internal Dependencies
Autorzy:
Tofani, A.
Di Pietro, A.
Lavalle, L.
Pollino, M.
Rosato, V.
Powiązania:
https://bibliotekanauki.pl/articles/2069305.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
natural hazards
risk analysis
interdependencies
power network
SCAD
Opis:
In this work, we present a peculiar application contained in a Decision Support System for Risk Analysis of (inter)dependent Critical Infrastructures under development within the EU FP7 CIPRNet Project. The application shows the efficacy and the benefits derived from a complete information of the multiple (inter)connected infrastructures (electrical and telecommunication) present in a Crisis Scenario. Electrical Distribution operators use SCADA systems to perform remote operations (tele-control) on the electrical grid such to ensure a constant and efficient energy supply to the consumers. Tele-control operations bi-directionally couple telecommunication and electrical networks: faults in one network produce effects, which then reverberate on the other. The work shows how the DSS, based on the damage estimate occurring on the two systems, may predict the correct tele-control operations needed for the restoring of the electrical grid based on topological properties of the electrical substations and the Telecom nodes.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 3; 133--140
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multifaceted decision support analysis of risk assessment in the process of transporting feed by rail transport using the FMEA method
Autorzy:
Krześniak, Mirosław
Szaciłło, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/38955608.pdf
Data publikacji:
2023
Wydawca:
Politechnika Warszawska, Wydział Transportu
Tematy:
FMEA
freight process
GMP+ System
proces spedycji
Opis:
The article presents selected aspects regarding transporting goods intended for animal feeding. The transport of this type of cargo must meet trade safety requirements and be monitored at every stage of the transport chain. The safety of transport of this type of goods is given priority because possible contamination of feed could affect the quality of food products and threaten human health. The authors referred to the reasons for creating an international procedure regarding, among others, the transport of this group of goods, limiting the risks mentioned above. The proposed procedure is a response to various incidents of feed contamination. It was introduced as an internal system and then developed internationally. The article points to the multi-threaded nature of topics related to the risk management process during the transport of feed intended for animal feeding by rail. This article presents an approach to this issue that considers a multi-aspect analysis of decision support. Risk assessment in transporting feed by rail is an essential factor influencing safety in trade. The article presents the FMEA method, which enables decision support analysis considering non-compliance risk. The recommended method that enables the examination of transport processes for this group of goods is the analysis of the types and effects of possible errors. The task solved using the FMEA method is fed by historical data, the transport task, and the FMEA methodology. Three elements are analyzed - the significance of non-compliance, the risk of non-compliance, and the possibility of detecting non-compliance. They enable quantification and determination of a risk priority number. If the acceptable risk level is exceeded, changes are made to the transport task. The article broadly refers to aspects of risk analysis, which allows you to manage the transport process.
Źródło:
WUT Journal of Transportation Engineering; 2023, 137; 115-131
1230-9265
Pojawia się w:
WUT Journal of Transportation Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lead and cadmium content in wheat grain from different regions of Poland and risk analysis
Autorzy:
Jędrzejczak, Renata
Ręczajska, Wiesława
Powiązania:
https://bibliotekanauki.pl/articles/2174347.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
contamination
Polska
risk analysis
excessive content
toxic metals
wheat
Opis:
The level of wheat grain contamination with lead and cadmium was determined using electrothermal atomic absorption spectrometry with Zeeman background correction (ETAAS) after microwave digestion. The obtained limits of quantification were 0.001 mg∙kg-1, for both metals. A total of 300 samples of wheat grain from agricultural regions of Poland were examined, 150 each from the two consecutive harvest years 2017 and 2018. None of the tested samples exceeded the maximum level of these metals, as specified in the European regulations. The contents of lead and cadmium in wheat grain from both years of harvest ranged from <0.001 to 0.098 mg∙kg-1 and from 0.006 to 0.098 mg∙kg-1, respectively. Despite similar ranges of these metals, the highest lead contents were two times lower than the maximum limit value, while the highest cadmium contents were close to it. As for lead, a significantly higher (p < 0.05) mean content of this metal was found in wheat grain from the 2018 harvest compared to 2017 and in the western compared to eastern regions of the country. However, the cadmium contents did not differ significantly between the two harvest years, but were significantly higher (p < 0.05) in wheat grain from the southern regions compared to northern regions of Poland. Additionally, the highest contents of cadmium, close to the maximum limit, were found in the South-West region and in the both years of harvest. The risk analysis of the occurrence of the excessive contents of toxic metals in wheat grain showed a low risk level for lead in all investigated regions, and a medium level for cadmium, in general.
Źródło:
Journal of Water and Land Development; 2022, 55; 192--199
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastyczna analiza ryzyka szeregów czasowych
Stochastic analysis of the risk of time series
Autorzy:
Mastalerz-Kodzis, Adrianna
Pośpiech, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/588658.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Modelowanie szeregów czasowych
Pomiar ryzyka
Stacjonarne i niestacjonarne procesy stochastyczne
Risk analysis
Stationary and non-stationary stochastic process
Time-series modelling
Opis:
Celem artykułu jest pomiar ryzyka w przypadku stacjonarnych i niestacjonarnych szeregów czasowych. Jako narzędzie do oceny ryzyka wykorzystano funkcję Höldera generującą multiułamkowe procesy ruchów Browna. Za pomocą wybranych metod badania szeregów czasowych przeanalizowano zmienność kursów walut: USD/PLN, EUR/PLN oraz CHF/PLN. Biorąc pod uwagę historyczne i obecne trendy w szeregach czasowych oraz wartości miary zmienności wyciągnięto wnioski z badań. Artykuł składa się z dwóch części zasadniczych: elementów metodyki badań oraz analizy empirycznej.
The aim of the article is to present the method of measuring local risk for stationary and non-stationary time series . In the article we have discussed the way of calculating risk within an area of any value of time series. As a tool enabling the assessment of the risk we have used Hölder's function generating multifractional processes of Brown's motion. With the use of selected time-series analysis methods the exchange rates volatility of the following currencies was examined: USD/PLN, EUR/PLN and CHF/PLN. The conclusions were drawn on the basis of the historical and current trends observed in the time-series and the values of variation measure. The paper comprises basic elements of research methodology as well as empirical examples.
Źródło:
Studia Ekonomiczne; 2017, 331; 112-122
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk of nonconformities and applied quality inspection methods in the process of aluminium profiles coating based on FMEA results
Autorzy:
Knop, K.
Powiązania:
https://bibliotekanauki.pl/articles/111986.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
nonconformity
quality inspection method
FMEA method
risk
analiza ryzyka
metoda FMEA
niezgodność
metoda kontroli jakości
Opis:
The article presents the results of risk analysis associated with nonconformities of aluminium profiles in the process of coating and quality inspection methods used to their detection. Analysis of risk was done based on results of FMEA method. Evaluated quality inspection methods were distinguished based on the term of inspection in the ISO 9000:2005 norm. Manufacturing process of aluminium profile in micro-technological approach was presented. Triple quantification of nonconformities risk based on the FMEA method by using three different approaches was conducted. Analysis of nonconformities risks associated with the use of specific quality inspection methods was done. In the last part the analysis of causes of critical nonconformities, proposals for improvement actions reducing the risk of the critical nonconformities and applied critical quality inspection method were showed.
Źródło:
Production Engineering Archives; 2017, 16; 16-21
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Software for Occupational Health and Safety Risk Analysis Based on a Fuzzy Model
Autorzy:
Stefanovic, M.
Tadic, D.
Djapan, M.
Macuzic, I.
Powiązania:
https://bibliotekanauki.pl/articles/90031.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
risk assessment
uncertainty
fuzzy model
software simulation
occupational health and safety
Opis:
Risk and safety management are very important issues in healthcare systems. Those are complex systems with many entities, hazards and uncertainties. In such an environment, it is very hard to introduce a system for evaluating and simulating significant hazards. In this paper, we analyzed different types of hazards in healthcare systems and we introduced a new fuzzy model for evaluating and ranking hazards. Finally, we presented a developed software solution, based on the suggested fuzzy model for evaluating and monitoring risk.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 127-136
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielowymiarowa warunkowa wartość zagrożona jako miara ryzyka
The Multivariate Conditional Value-At-Risk As a Measure of Risk
Autorzy:
Krzemienowski, Adam
Powiązania:
https://bibliotekanauki.pl/articles/591326.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Analiza wartości zagrożonej
Pomiar ryzyka
Wielowymiarowa analiza ryzyka
Zmienne losowe
Multi-dimensional risk analysis
Random variable
Risk measures
Value at Risk Analysis
Opis:
The Multivariate Conditional Value-at-Risk (MCVaR) is a scalar risk measure for multivariate risks modeled by multivariate random variables. It is assumed that the univariate risk components are perfect substitutes, i.e., they are expressed in the same units. MCVaR is a quantile risk measure that allows one to emphasize the consequences of more pessimistic scenarios. By changing the level of the quantile, the measure permits to parameterize prudent attitudes toward risk ranging from extreme risk aversion to risk neutrality. In terms of definition, MCVaR is slightly different from the popular and well-researched Conditional Value-at-Risk (CVaR). Nevertheless, this small difference allows one to efficiently solve MCVaR portfolio optimization problems based on the full information carried by a multivariate random variable using column generation technique, which is not possible in the case of CVaR.
Źródło:
Studia Ekonomiczne; 2013, 154; 53-60
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flash Flood Risk and Climate Analysis in the Extreme South of Algeria (the Case of In-Guezzam City)
Autorzy:
Zegait, Rachid
Pulido-Bosch, Antonio
Hamadeha, Bachir
Şen, Zekai
Madi, Housseyn
Powiązania:
https://bibliotekanauki.pl/articles/2174653.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
climate trend
flash floods
HEC-RAS
modeling
risk analysis
Opis:
Natural risks, particularly flood risk, are a topical subject in Algeria and throughout the world, particularly given the last major catastrophic floods in Sudan (2020) and North Africa. With the development of the climate change phenomenon in the world, risk management is becoming increasingly necessary for all the actors concerned (decision-makers, technicians, and the population) to identify protection issues. In 2018, in the extreme south of Algeria, In-Guezzam City suffered a devastating flood that caused significant damage and loss of human and material resources. More than 100 homes collapsed, and approximately 345 families were displaced. Currently, there is no research work to assess the hydrological situation and the risk of flooding in this region. Therefore, the main purpose of this study is to shed light on the risk of flash floods in the extreme south of Algeria with more specific attention to the August 2018 floods as well as the climate trends over the past 30 years using Mann–Kendall test and Sen’s Slope Estimator. The chosen approach involves a hydrological study and hydrodynamic modeling using HEC-RAS software. This latter allows for simulating floods using statistical methods and creating several regional flood hazard maps.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 4; 157--185
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of hazards in the workplaces of Artisanal mining in Katanga
Autorzy:
Elenge, Myriam M.
De Brouwer, Christophe
Powiązania:
https://bibliotekanauki.pl/articles/2185473.pdf
Data publikacji:
2011-03-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
artisanal mining
risk factor
risk analysis
occupational health
Katanga
Opis:
Objective: While artisanal mining takes place in casual framework and with total ignorance of good practices, few studies have focused on the origin of hazards specific to each workplace constitutive of this exploitation facility. Nevertheless, this study is a condition of an efficient occupational health and safety control in this sector. Materials and Method: We took the effort to identify different workplaces, as well as hazards specific to each of them, through the observation and analysis of the tasks, tools and the processes related to their use applied in the Ruashi artisanal mine. Results: The investigated exploitation facility consists of five workplaces: diggers (60% – in charge of mineralized gangue recovery); crushers; washers; hand-made furnace workers (in charge of various treatment processes); and loaders (in charge of packing the obtained material). Beside the risks common to these various workplaces and ensuing notably from the lack of hygiene and working in bad positions, operating in underground galleries, in particular, exposes diggers to the risks connected with collapsing parts of the mine, suffocation, dehydration or fine particles in the breathed air. Crushers are especially exposed to traumatism risks, notably ocular, and loaders are exposed to risks related to handling heavy loads. These risks are connected with the mining processes because, in spite of the similarity of tools, they appear less often in other forms of artisanal exploitation described in literature. It is notable in the case of crushing in sawed gas bottles where ocular trauma risk is decreased. It was also shown that humidification of work surface reduces dust particles emission into the air. Conclusions: Hazards identification, through a tools and processes description, has the advantage of providing information on reducing the occurrence of these risks. It shows that this reduction is not necessarily a consequence of the activity mechanization degree.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2011, 24, 1; 57-66
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 828

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