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Wyświetlanie 1-15 z 246
Tytuł:
The studies on lubricity and contamination analysis of the personal car’s lubricating oil with taking oil ageing into account
Autorzy:
Sikora, G.
Powiązania:
https://bibliotekanauki.pl/articles/247671.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
oil ageing
viscosity characteristics
ageing model
rheology
Opis:
In this paper, the results of researches on lubricity and content analysis of the personal car’s engine oil are presented. The measurements of lubricity are made on the T02-U four-ball tester. The content analysis is made on the Spectroil Q100 spectrometer, which makes it available to measure the amount of 24 chemical elements. Due to this analysis, technical condition of the engine is possible to estimate. Tested oil is Shell Helix AV-L, which was exploited in the personal car, Volkswagen Touran, equipped with the turbo charged diesel engine, with the capacity of 2.0 litres. The samples for oil ageing characteristics were taken from the engine in the intervals approx. 3500 km. This research was performed as a result of the other studies on the dynamic viscosity characteristics. In the viscosity researches for this oil, was shown, that in the first period of the exploitation time, the viscosity decreases significantly. Detailed research on the additives and wear products content, as well as a lubricity characteristic, defines the reason of such a significant decrease of the oil properties. This paper is a part of a wider research on the oil ageing characteristics. It will support development to the new mathematical model of the lubricating oil viscosity changes during the exploitation time of the engine
Źródło:
Journal of KONES; 2013, 20, 3; 375-379
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on dynamic viscosity changes of the engine’s lubrication oil depending on the pressure
Autorzy:
Sikora, G.
Powiązania:
https://bibliotekanauki.pl/articles/950168.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
oil ageing
viscosity characteristics
ageing model
rheology
Opis:
This paper is a part of the wider author’s research on the development of the new mathematical model for description of the viscosity changes of the lubrication oil in the exploitation time. Pressure of the oil is a variable parameter in the combustion engine and depends on many design parameters such as oil pump efficiency, geometry of the channels and lubricated element. It depends also on the exploitation parameters, such as rotational speed of the engine or contamination degree of the oil filter. So big amount of the factors, which have an influence on the pressure, resulted in the decision to examine, how big influence has a pressure in the oil viscosity. For the researches, the oil samples from the different combustion engines, both petrol and diesel, with different capacities, were taken into account. In each case, for the examination were taken samples both for the fresh oil and used oil from the change. Results of this research are shown in the tabular in correlation to the engines specification. In the next researches, after collecting all the oil ageing data, author will examine the pressure distribution in the slide bearing. After that it will be will possible to estimate the importance of the pressure changes for the proper work of the engine.
Źródło:
Journal of KONES; 2013, 20, 4; 405-409
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Demographic Changes in Poland – The Regional Dimension
Autorzy:
Richert-Kaźmierska, Anita
Powiązania:
https://bibliotekanauki.pl/articles/517260.pdf
Data publikacji:
2015
Wydawca:
Instytut Badań Gospodarczych
Tematy:
demographic changes
population ageing
regional diversity of ageing
Opis:
The progressive ageing process concerns both Poland and other Member States of the European Union. In recent years, the share of workers of non-mobile and post-productive age in the total population has been rising, and according to forecasts, in 2035 people aged 45 years and over will represent two-thirds of our society. Since the year 2012, announced the Year of Active Ageing and Solidarity between Generations by the European Commission, more and more attention has been paid in the Polish public space to the issues of an ageing society, including its impact on the health of the economy. The article notes that the ageing process does not occur uniformly across all Polish regions, i.e. at the same pace and with the same intensity. The results of studies indicating the regions being most vulnerable to the ageing of the regional community and the negative consequences of this process in the next two decades are presented.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2015, 10, 1; 113-128
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aging in Poland at the Dawn of the 21st Century
Autorzy:
Mucha, Janusz
Krzyżowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1929629.pdf
Data publikacji:
2010-06-23
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
ageing in the lifecourse
anthropology of ageing
ageing and social panics
retirement strategies
intergenerational transfers
Opis:
The aim of this article is to present some aspects (both individual and collective) of the present and future situation of the elderly in the Western world, with particular stress on Poland. The authors examine a few contexts of aging as a stage of human life. Some aspects of the processes discussed here are relatively common whereas others have only gained importance in recent decades. This paper is composed of two parts. The first one, using socio-cultural anthropological, as well as historical data, describes various significant contexts of the present and approaching processes, focusing on the continued and changing perceptions of old age. The second part, based on the quantitative data delivered by statistical services and pooling centres, shows the most likely positions of various groups of the elderly in the Polish society in the perspective within the coming 25 years.
Źródło:
Polish Sociological Review; 2010, 170, 2; 247-260
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WHO WANTS TO WORK LONGER?
Autorzy:
Strasburger, Aleksander
Zajkowska, Olga
Powiązania:
https://bibliotekanauki.pl/articles/453299.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
retirement decisions
ageing
Opis:
The observed collapse of demographic pyramid increases the tension on the social security systems, especially pensions. It implies a requirement to extend the retirement age. On the basis of Eurobarometer 65.1 we calculate difference between expected and preferred retirement age in Poland. Then we show the determinants of individual differences. Particular attention is paid to the problem of non-random missing observations.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 2; 220-228
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problems of varistor quality assessment during exploitation
Autorzy:
Smulko, J.
Olesz, M.
Hasse, L.
Kaczmarek, L.
Lentka, G.
Powiązania:
https://bibliotekanauki.pl/articles/220627.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
varistors
quality
ageing
Opis:
Varistors are commonly used elements which protect power supply networks against high-voltage surges or lightning. Therefore, quality and endurance of these elements is important to avoid losses when an expensive laboratory equipment would not be protected from random overvoltages. Additionally, excessive leakage currents generate serious costs due to high energy consumption. The paper presents shortly properties of varistors that comprized different ZnO grain types and can have various quality which changes continuously during exploitation (due to exposition to overheating and overvoltage pulses). Therefore, it is important to monitor varistors during their ageing (causing changes within their microstructures). A few methods of varistor property diagnosis were considered and compared with the methods currently applied in laboratory or industry applications. A new measurement (diagnostic) system that can monitor varistors during ageing and can be widely applied in power networks is presented. The proposed system fulfills requirements of the industrial customers which demand various methods for power line protection. The proposed system can be simply developed into a more advanced wireless diagnostic system of long power supply lines.
Źródło:
Metrology and Measurement Systems; 2012, 19, 2; 395-404
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ageing PSA as a support for effective ageing management
Autorzy:
Berg, H. P.
Volkanovski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2069520.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
ageing
ageing management
probabilistic safety assessment
prioritization
management of activities
Opis:
Because of the growing operational age of nuclear power plants, the ageing management of structures, systems and components used in these plants is gaining an important role. Technical systems are subject to timedependent and operationally caused ageing phenomena with modifications of originally given characteristics and, thus, of relevance in terms of safety. Especially physical ageing is of importance. Therefore, a comprehensive ageing management is required. In the context of an integrated safety management it has to be shown how to integrate the safety related issues of ageing into probabilistic safety assessment (PSA). In particular the question is to be answered whether the effort for the execution of an ageing PSA is justified, in particular if the safety significant effects of ageing can be identified and quantitatively estimated. Method for prioritization of the components in the nuclear power plant considering implication of their ageing on safety of the nuclear power plant is presented. On the basis of an actual report on ageing management in German nuclear power plants and a literature survey, this paper tries to estimate the necessity and value for the introduction of an ageing PSA in Germany.
Źródło:
Journal of Polish Safety and Reliability Association; 2014, 5, 2; 1--10
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Age and Type of Force on Muscle Strength Capabilities in Women
Autorzy:
Tokarski, T.
Roman-Liu, D.
Kamińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/90634.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
muscle
strength
ageing
women
Opis:
The aim of this study was to assess handgrip and 5 other types of force in 52 women and to determine if handgrip force reflected general upper limb force capabilities correlated with age. The women were divided into subgroups according to age: 20–25, 45–50 and 55–65 years. Maximum forces of the right upper limb were measured in 6 types of force activities. In most tests the values of force showed statistically significant differences between the 20–25 group and the groups aged 45–50 and 55–64 years. The results did not show any differences related to age or to force activities that involved the small muscles of the forearms and hands. Thus handgrip force cannot always be considered an indicator of total force capabilities.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 1; 47-57
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FOCUS: Frailty Management Optimisation through EIPAHA Commitments and Utilisation of Stakeholders’ Input – an innovative European Project in elderly care
Autorzy:
Cano, Antonio
Kurpas, Donata
Bujnowska-Fedak, Maria
Santana, Silvina
Holland, Carol
Marcucci, Maura
Gonzales-Segura, Ana
Vollenbroek-Hutten, Miriam
D'Avanzo, Barbara
Nobili, Alessandro
Apostollo, Joao
Bobrowicz-Campos, Elżbieta
Martinez-Arroyo, Ana
Powiązania:
https://bibliotekanauki.pl/articles/552003.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
frailty
stakeholders
healthy ageing.
Źródło:
Family Medicine & Primary Care Review; 2016, 3; 373-376
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenomenon of ageing – a process or a state
Autorzy:
Klusek, Jolanta
Klusek, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/472562.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
ageing
cell
brain
hormones
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Biologiae Pertinentia; 2016, VI; 42-51
2083-7267
2450-3487
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Biologiae Pertinentia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HOW DEMOGRAPHY AFFECTS THE ECONOMY - IMPACT OF POPULATION AGEING ON INFLATION
Autorzy:
Broniatowska, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/453381.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
population ageing
inflation
demography
Opis:
The motivation of this paper is to check whether inflation is linked to the population age structure. To check this hypothesis, a panel data model is used. We regress the changes in CPI on a set of macroeconomic variables. The results of the estimations suggest that there may be a relation between demography and low-frequency inflation. A larger old-age dependency ratio is correlated with lower inflation. This may confirm some of the previous empirical findings that ageing is deflationary when related to increased life expectancy.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 1; 1-11
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health in old age, and patients’ approaches to telemedicine in Poland
Autorzy:
Buliński, Leszek
Błachnio, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/986660.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
ageing
telemedicine
quality of life
Opis:
Introduction. The ageing society of Poland still experiences health-related problems and increasing difficulties in receiving medical care. The initiation of telemedicine programmes can change this situation for the better. The question arises whether telemedicine is a solution that the elderly are willing to accept and take advantage of in order to raise their quality of life. Objective. The aim of the research was an investigation of the quality of life and the course of ageing among the elderly Polish population, and their openness to the notion of telemedical services. Materials and method. A questionnaire-based study was conducted in 2015 on a sample group of 312 seniors. The respondents completed the Diener Satisfaction with Life Scale (SWLS) and the subscale of Health States from Fragebogen zur Lebenszufriedenheit (FLZ) by Fahrenberg et al. Each participant gave consent to take part in the research. Results. SWLS presents a relatively stable value in the subsequent decades of old age (60–69 years, M=21.93, SD=6.25; 70–79 years, M=21.70, SD=5.52; 80+yeasrs, M=21.38, SD=5.82). The health related quality of life (the FLZ subscale) varied in the analysed subgroups (F=7.783: p=0.000) and was related to comorbidity and polytherapy. A positive attitude towards telemedicine was expressed by 40% of those surveyed. However, the need of the seniors for telemedicalservices was limited and did not exceed the 10%. Conclusions. In Poland, in ageing there still dominates the experience of multiple ailments and polytherapy, something which justifies a search for new, easily accessible, and economically sound solutions for health care. Telemedicine is a promising solution, although there is a need for definite steps to be taken to increase the willingness among geriatric patients to take advantage of telemedicine.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trust in Technology in Case of Humanoids Used for the Care for the Senior Persons
Autorzy:
Ejdys, J.
Powiązania:
https://bibliotekanauki.pl/articles/2064972.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
technology trust
humanoids
ageing population
Opis:
The dynamics of demographic changes manifested in the processes of an ageing population affect Poland.In response to the situation, gerontechnology is emerging as an interdisciplinary field of scientific research in which technology is directed towards the aspirations and opportunities of the older persons. One of the examples of technologies that will be able to support the ageing population in the future are humanoids, that is, robots resembling a human being and equipped with artificial intelligence. The purpose of this article was to examine relationships between trust in the use of humanoids to care for the older people, the usefulness of technology, the ease of use, perceived threats, general trust and trust in science and technology. A survey method was used to collect data for research. The electronic questionnaire survey was disseminated among members of the Polish society. 643 filled questionnaires were received.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 875--881
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling Safety of Multistate Ageing Systems
Autorzy:
Kołowrocki, K.
Soszyńska-Budny, J.
Powiązania:
https://bibliotekanauki.pl/articles/2068803.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
modelling
ageing systems
multistate
safety
Opis:
First, basic notions of the multistate system safety analysis are introduced, i.e. the multistate components and the multistate system, the multistate system component safety function, the multistate system safety and the multistate system risk function are defined. Moreover, the multistate system component and the multistate system main safety characteristics, i.e. their mean values of the lifetimes and in the safety state subsets and in the particular safety states and standard deviations and the moment when the system risk function exceeds a fixed permitted level are determined. Furthermore, there are constructed safety models of the multi-state homogeneous and non-homogeneous series, parallel, “m out of n”, consecutive “m out of n: F”, series-parallel, parallel-series, series-“m out of n”, “m out of n”-series, series-consecutive “m out of n: F” and consecutive “m out of n: F”-series systems and their safety functions are determined. Moreover, a very often met in practiceseries system composed of multistate subsystems identical with the considered earlier multistate systems is considered and its safety function is determined.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 3; 9--22
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling safety of multistate systems with ageing components
Autorzy:
Soszyńska-Budny, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069387.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
safety
risk
multistate system
ageing
Opis:
Basic notions of the ageing multistate systems safety analysis are introduced. The system components and the system multistate safety functions are defined. The mean values and variances of the multistate systems lifetimes in the safety state subsets and the mean values of their lifetimes in the particular safety states are defined. The multi-state system risk function and the moment of exceeding by the system the critical safety state are introduced. The exemplary safety structures of the multistate systems with ageing components are defined and their safety functions are determined. As a particular case, the safety functions of the considered multistate systems composed of components having exponential safety functions are determined. Applications of the proposed multistate system safety models to the evaluation and prediction of the safty characteristics of the exemplary series, parallel, “m out of n”, consecutive “m out of n: F”, series-parallel, parallel-series and “m out of l”-series systems are presented as well.
Źródło:
Journal of Polish Safety and Reliability Association; 2013, 4, 1; 109--120
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 246

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