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Tytuł:
Numerical simulations of temperature and velocity fields in the storage tank with the three-coil heat exchanger
Autorzy:
Smusz, Robert
Wilk, Joanna
Bałon, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/176025.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stratification device
numerical calculations
temperature stratification
coil heat exchanger
Opis:
This article presents the results of the numerical investigation of the thermal stratification in the hot water storage tank. The exchanger consists of three tube coils that are immersed in the storage tank of hot water. Two coils—lower and upper—are designed to warm the water in the tank using the water as a heating medium. Another coil—uses the refrigerant for the waste heat transfer. The temperature stratification device is mounted in the thermal storage tank. The device’s task is to improve the thermal stratification level of heated water. The performed numerical simulations allowed us to obtain the temperature and velocity fields in the storage tank under the conditions of the work of coils filled with water. Calculations were made in the case of the use of the stratification device under the operating conditions of the 10.2478/amst-2019-0015upper and lower coils with water.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 3; 74-79
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using the Internet to determine fatal cardiovascular risk in the Polish population
Autorzy:
Trzeciak, Bartosz G.
Jaśkiewicz, Michał
Siebert, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/1954079.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
cardiovascular disease
internet
risk stratification
Opis:
We present the first program in Poland to determine the cardiovascular disease (CVD) risk of individuals, called Ryzyko. The program is freely available at www.ryzyko.amg.gda.pl. Our program, partially based on the European SCORECARD program, takes into account parameters such as age, sex, systolic blood pressure, total cholesterol concentration and cigarette smoking, and enables internet users to observe themselves to determine the degree of their CVD risk.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 3; 439-440
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of Possum Score in Predicting the Outcome in Patients Undergoing Emergency Laparotomy
Autorzy:
Sreeharsha, Harinatha
Sp, Rai
Sreekar, Harinatha
Reddy, Ravi
Powiązania:
https://bibliotekanauki.pl/articles/1395749.pdf
Data publikacji:
2014-04-01
Wydawca:
Index Copernicus International
Tematy:
POSSUM scoring
emergency laparotomy
risk stratification
Opis:
Monitoring of surgical outcome is increasingly important part of governance of surgical activity. The aim of the study. POSSUM scoring system was applied prospectively to determine how it performed in predicting morbidity and mortality in patients undergoing emergency laparotomy in our hospital, a group known to be at high risk of complications and death. Material and methods. A total of 100 cases of emergency laparotomies were studied in patients admitted in general surgery department during the period of May 2008 to August 2010. The study group consisted of the following cases. Duodenal perforation (37 cases), intestinal obstruction (27 cases), gastric perforation (8 cases), ileal perforation (8 cases), appendicular perforation (7 cases), blunt trauma (4 cases) and others (9 cases). They were scored using POSSUM scoring system. Physiological scoring was done at the time of admission and operative scoring was done intraoperatively. They were followed up for the first 30 day post operative period for any complications and the outcome was noted. The observed morbidity and mortality rates were compared with the POSSUM predicted morbidity and mortality rates. Results. 15 patients died (mortality rate of 15%). The POSSUM predicted mortality was 20 deaths. O:E ratio of 0.71 was obtained. There was no statistically significant difference between the observed and predicted mortality rates (χ2=1.72, p=0.974). 71 patients experienced complications. The POSSUM predicted morbidity was 61 patients. O:E ratio of 1.19 was obtained. There was no statistically significant difference between the observed and predicted morbidity rates (χ2=1.594, p=0.991). Conclusions. POSSUM scoring is an accurate predictor of mortality and morbidity following emergency laparotomy and is a valid means of assessing adequacy of care provided to the patient. POSSUM can be used for surgical audit to assess and improve the quality of surgical care and helps in better outcome to the patient
Źródło:
Polish Journal of Surgery; 2014, 86, 4; 159-165
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration in the Educational System in Israel and Its Influenceon Social Stratificationin a Changing World
Integracja w systemie oświaty w Izraelu i jej wpływ na rozwarstwienie społeczne w zmieniającym się świecie
Autorzy:
Franco, Manor Sali
Powiązania:
https://bibliotekanauki.pl/articles/916088.pdf
Data publikacji:
2020-01-19
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
integration
educational
Israel
stratification
economic status
Opis:
Among the phenomena that characterize modern society it is possible to note the appearance of complex political, occupational, and sectorial systems of status and the weakening of the ‘class’ factor in its ideological meaning. The main result of this development was the steadily increasing conflictbetween, on the one hand, the trends of economic development and the new centers of power and, on the other hand, the mobility of new groups. All the groups competed among themselves over the additions of income, accessibility to economic resources, and positions of influencein the government system as well as over the creation of autonomous frameworks. An important part in these sectorial formations is related to the positioning of education in the entire stratifiedsystem. The statement that the extension of education has not resulted in the reduction of social gaps in the professional field,especially between employees, is correct, yet conversely it did drive a process of change in the evaluation of different subjects and a change in the perception of education as a necessary state of specialization. This aspect constitutes an important factor in the processing of the stratifiedmap and in the formation of the class awareness. The education systems, which are the main organizations to inculcate education, can determine who is qualifiedand who is not qualifiedto filldifferent employment roles; they have become the main device for the achievement of social and economic status.
Źródło:
Studia Edukacyjne; 2017, 46; 439-449
1233-6688
Pojawia się w:
Studia Edukacyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial and seasonal variability of temperature and salinity in Bransfield Strait and Admiralty Bay, Antarctica
Autorzy:
Rakusa-Suszczewski, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/2052591.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
T/S stratification
annual cycles
Źródło:
Polish Polar Research; 1996, 17, 1-2; 29-42
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximately optimum strata boundaries for two concomitant stratification variables under proportional allocation
Autorzy:
Danish, Faizan
Rizvi, S. E. H.
Powiązania:
https://bibliotekanauki.pl/articles/1917115.pdf
Data publikacji:
2021-12-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
stratification points
proportional allocation
minimal equation
Opis:
The proper choice of strata boundaries is an important factor determining the efficiency of the estimator of the considered characteristics of a population. In this article, the Cum Di(x,z) Rule (i=3,4) for obtaining approximately optimum strata boundaries has been applied, taking into account a single-study variable along with two concomitant variables serving as the basis of the stratification variables. The relative efficiency of the proposed methods has been demonstrated theoretically and empirically by comparing them to a selection of already-existing methods in a simulation study with the use of the proportional allocation method.
Źródło:
Statistics in Transition new series; 2021, 22, 4; 19-40
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Retirees Are Also Stratified: Pre-Retirement Socio-Occupational Status and the Well-Being of Older Adults in Central Europe
Autorzy:
Večerník, Jiří
Powiązania:
https://bibliotekanauki.pl/articles/1790272.pdf
Data publikacji:
2021-03-22
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
well-being
seniors
Central Europe
social stratification
Opis:
Most stratification research concerns solely the economically active population and omits inactive seniors. Retirees are often treated as a separate and rather homogeneous social category. However, this approach is only partially valid. Retirees can still be differentiated in regard to their objective and subjective well-being, which is linked to their former occupations. Using large EU-SILC datasets for Central European countries, this article focuses on the effect of pre-retirement socio-occupational category on the well-being of retirees. The category is found to be an important explanatory variable after controlling for age, sex, marital status, and other characteristics. However, there are substantial differences among countries. While in Czechia, retirees are most homogeneous in regard to their objective and subjective well-being across socio-occupational categories, the differences are considerably larger in Hungary and Poland, and on a similar level as in our benchmark country, Austria.
Źródło:
Polish Sociological Review; 2021, 213, 1; 27-46
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of thermal stratified storage tank
Autorzy:
Smusz, R.
Kielan, P.
Mazur, D.
Powiązania:
https://bibliotekanauki.pl/articles/140948.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
temperature stratification
thermal energy
heat recovery
convection
Opis:
The basic aim of the task is to compile a temperature stratification system in an accumulation tank. The range of the thesis concerns the shape and dimensions of a stratification system for an accumulation tank. Thermal stratification is a process that comprises the maintaining of temperature stratification at different levels of an accumulation tank which reduce to a minimum the process of temperature equalization. It results from the fact that the thermal stratification in a tank significantly increases the installation efficiency and improves the process of energy storing. It is connected with a thermodynamic element quality, that is the higher the temperature, the higher the energy, and, thus, the thermosdynamic element quality. In this phenomenon, thanks to the same amount of accumulated thermal energy and average temperature, as in a fully mixed tank, the user has a higher temperature in the upper part of the tank at his disposal. It has significant importance in the case when there is a low-temperature heating medium that transfers heat to the accumulation tank. Such a situation occurs when heat is absorbed from synthetic freons used in cooling and air-conditioning systems.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 631-642
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of tempestites from Quaternary lacustrine deposits in the Ağrı Basin (Eastern Anatolia, Türkiye) : palaeoclimatological and palaeogeographic implications
Autorzy:
Üner, Serkan
Powiązania:
https://bibliotekanauki.pl/articles/27324244.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tempestite
hummocky cross-stratification
Quaternary
Eastern Anatolia
Opis:
Several event layers have been identified in lacustrine deposits in the AErI Basin of Anatolia (E Türkiye). Sedimentological and palaeontological data newly indicate a storm-induced origin for some of them. The sedimentary structures in three sections, a few tens of metres apart from each other laterally, such as hummocky cross-stratification, wave-generated cross-bedding, parallel bedding, erosional surfaces, and graded bedding, which are considered characteristic of tempestites, are clearly present. Additionally, fining-upwards units and biogenic escape structures located at different levels of these sections indicate a similar origin. The vertical variations in layer thickness, grain size, and sedimentary structures in these sedimentary sections indicate fluctuating hydrodynamic conditions during deposition, while lateral decrease in the size and wavelength of the structures reflects deepening. This interpretation of storm-induced deposition is compatible with regional palaeoclimatological and palaeogeographical data, and is supported by evidence of Quaternary storm-induced sedimentation in adjacent lacustrine basins in the region.
Źródło:
Geological Quarterly; 2023, 67, 2; art. no. 13
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Values Preferred by Teachers and Students for Teacher Training Faculties
Autorzy:
Stanek, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/28765639.pdf
Data publikacji:
2005-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
value
teachers
axiology
social stratification
profession
teaching speciality
Opis:
In his article, the author outlines the values preferred by teachers and those aspiring to the profession. The presented data point to a very broad convergence between what teachers and students indicated with regard to their attitude towards values. Although one can observe certain, rather subtle, differences (related to, among others, the socio-demographic characteristics of those surveyed), they are of secondary importance and do not cause the axiological bases for the functioning of both groups to differ. What is significant is also the placement of such values as safety, responsibility and children. These values have a static character, connected with necessity and, at the same time, with the need to maintain one’s property. They proved to be slightly more appreciated by teachers than by students. The research shows one essential yet weak correlation: two values, wisdom and honesty, find a slightly wider acknowledgement among teachers than among their future colleagues. The same can be said of the case when the same values are chosen as primary. In this context, referring everything that takes place in the social space to distant, better times seems to be justified. No matter how it was in the real historical dimension, it appears justified to assert that it is undoubtedly better to live in an environment where the majority of those representing a given professional group (especially one as important for the social structure as teachers) recognise the importance of wisdom and honesty.
Źródło:
The New Educational Review; 2005, 7; 152-170
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical Research on Social Stratification in the Visegrád Countries: An Overview
Autorzy:
Nešpor, Zdeněk
Večerník, Jiří
Powiązania:
https://bibliotekanauki.pl/articles/22859452.pdf
Data publikacji:
2023-03-20
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
empirical research
social stratification
Visegrád countries
comparative surveys
Opis:
This article outlines developments in empirical research on social stratification in the four countries constituting currently the Visegrád Group (V4). Sociology has been developing, if unevenly, as a discipline in these countries since the 19th or early 20th century. Empirical research on social stratification, based on data collected in large surveys, started here by the mid-1960s, first in Poland, then in Hungary, and later in the former Czechoslovakia. In spite of the ideological pressure of the communist regimes in all of these countries, the conditions for sociological studies were much better in Poland and Hungary than in Czechoslovakia, where such research was frozen for a long time after the communist putsch of 1948 and again after the Soviet occupation in 1968. After 1990, this kind of research enjoyed an energetic new start in all the post-communist countries, as they opened fully to the West and integrated into international networks. In addition, comparative research within the V4 region started with the challenging project “Social Stratification in Eastern Europe after 1989.” Many national surveys were conducted and East-West cooperation intensified. Currently, most empirical research on social stratification occurs on a national or bilateral basis, or is developed within larger European projects.
Źródło:
Polish Sociological Review; 2023, 221, 1; 4-26
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SAMPLE ALLOCATION IN ESTIMATION OF PROPORTION IN A FINITE POPULATION DIVIDED INTO TWO STRATA: AN EXAMPLE OF APPLICATION
Autorzy:
Sieradzki, Dominik
Zieliński, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/453168.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
survey sampling
sample allocation
stratification
estimation
election poll
Opis:
The problem of estimating a proportion of objects with particular attribute in a finite population is considered. This paper shows an example of the application of estimation fraction using new proposed sample allocation in a population divided into two strata. Variance of estimator of the proportion which uses proposed sample allocation is compared to variance of the standard one. In the paper an application of sample allocation described in Sieradzki & Zieliński [2017] is presented."
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 1; 71-77
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Analysis of Social Stratification in Elizabeth Gaskell’s Mary Barton: A Tale of Manchester Life from a Marxist Perspective
Autorzy:
Kaptan, Gizem
Powiązania:
https://bibliotekanauki.pl/articles/606091.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
capitalism
social stratification
working class
marxism
Mary Barton
Opis:
Der Band enthält die Abstracts ausschließlich in englischer Sprache.
While Industrial Revolution helped England to become a great power in the world, capitalism created a huge gap between the middle classes and working classes. Observing the condition of the society, Marx and Engels created their famous claim of class struggle in The Communist Manifesto. They emphasized the gap between two classes and how to revolt against the capitalist system by the working class. This paper ventures to study the class issue in the Victorian society from the perspective of the Marxist literary theory. It analyses how the capitalist system makes working class people’s life miserable while it enriches the lives of middle class people. In this respect, Elizabeth Gaskell’s novel Mary Barton will be studied together with the links between the novel and The Communist Manifesto.
Le numéro contient uniquement les résumés en anglais.
Том не содержит аннотаций на английском языке.
Źródło:
Lublin Studies in Modern Languages and Literature; 2017, 41, 1
0137-4699
Pojawia się w:
Lublin Studies in Modern Languages and Literature
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Horizontal Inequalities in Higher Education
Autorzy:
Zawistowska, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/1929899.pdf
Data publikacji:
2011-09-27
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
horizontal educational inequality
higher education
stratification
educational selection
Opis:
This paper aims to answer two questions concerning inequalities in tertiary education. First question concerns the effect of social origin on choice of field of study and the second question concerns the effect of gender. Existing research has demonstrated a significant relation between social background and the field of study. Individuals with more educated parents are more likely to study at prestigious faculties, such as law or medicine. Women are more willing than men to choose humanities and social studies whereas men more often choose technical studies. Will these patterns continue in the face of the rapid increase in number of students which began in Poland in the 1990s? A survey conducted in three state higher-education establishments in Białystok in 2008 shows that students’ choices continue to be affected both by social background and gender. We also found a significant relationship between the field of study and general risk-proneness. These results are explained in terms of three different theories: cultural capital, critical theory, and rational choice.
Źródło:
Polish Sociological Review; 2011, 175, 3; 333-350
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preferred Levels of Income Inequality in a Period of Systemic Change: Analysis of Data from the Polish Panel Survey, POLPAN 1988–2003
Autorzy:
Kołczyńska, Marta
Merry, Joseph J.
Powiązania:
https://bibliotekanauki.pl/articles/1810841.pdf
Data publikacji:
2016-06-24
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
stratification
inequality
economic attitudes
panel analysis
transition
Polska
Opis:
Rising trends in economic inequality are well-established across many affluent nations. However, researchers have accrued considerably less knowledge regarding the economic attitudes and preferences of individuals living within the context of increasing inequality, especially in developing or transition countries. To gain leverage on this topic, we utilize data from Polish Panel Survey (POLPAN) from 1988–2003 to examine change over time in respondents’ preferred levels of income inequality. Results show that Poles tend to accept higher levels of income inequality over time. This effect increases with time, even after controlling for respondents’ meritocratic beliefs and attitudes toward state intervention. In addition, this rise in preferred income inequality changes in accordance with actual and perceived changes in the earnings distribution. After describing the patters of variation in acceptance of income inequality between different social groups, we discuss the implications of individuals’ evolving benchmarks for preferred levels of inequality.
Źródło:
Polish Sociological Review; 2016, 194, 2; 171-190
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
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