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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
Wyświetlanie 1-10 z 828

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