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Wyświetlanie 1-15 z 3498
Tytuł:
Żywienie a wydajność pracy
Pitanie a proizvoditel'nost' truda
Nutrition and work output
Autorzy:
Namyslowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/877073.pdf
Data publikacji:
1958
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
zywienie czlowieka
wydajnosc pracy
sposob zywienia
sklad jakosciowy
przerwy miedzy posilkami
zdolnosc koncentracji
czestotliwosc spozycia
human nutrition
work efficiency
nutritional model
qualitative composition
interval between meal
concentration ability
consumption frequency
Źródło:
Roczniki Państwowego Zakładu Higieny; 1958, 09, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poglądy na mechanizm działania nowoczesnych środków owadobójczych
Vzgljady na mekhanizm dejjstvija sovremennykh insekticidov
Opinions on the mechanism of action of the modern insecticides
Autorzy:
Mlodecki, H.
Powiązania:
https://bibliotekanauki.pl/articles/874050.pdf
Data publikacji:
1959
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
srodki owadobojcze
ochrona roslin
mechanizm dzialania
dzialania owadobojcze
skutecznosc dzialania
insecticide
plant protection
action mechanism
insecticidal property
activity efficiency
Źródło:
Roczniki Państwowego Zakładu Higieny; 1959, 10, 3
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational complexity of problems of combinatorics and graph theory
Autorzy:
Sysło, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/748066.pdf
Data publikacji:
1980
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Computational complexity and efficiency of algorithms
Exact categories, abelian categories
Network models, deterministic
Integer programming
Opis:
.
From the introduction: "The present article does not pretend to be a complete survey of all or even of the most important algorithms in combinatorics and graph theory. The algorithms presented illustrate only general considerations involving the computational complexity of problems of combinatorics. It is assumed that the reader is acquainted with the fundamental algorithms of combinatorics and graph theory. The first part of the paper is an outline of basic computation models used in the analysis of combinatorial algorithms. In subsequent parts, problems for which optimal or `good' algorithms exist are discussed. Here problems connected with the class P are presented, i.e. the class of problems that can be solved by algorithms with polynomial complexity. A formal definition is given of the class P and the class NP, to which, with minor exceptions, all difficult problems-the knapsack problem, the scheduling problem, the problem of Hamiltonian circuits in graphs and networks, etc.-belong. The question whether P=NP is a fundamental problem in the analysis of the computational complexity of combinatorial algorithms. Contents: (1) Introduction; (2) Computational complexity of algorithms; (3) Computation models; (4) Ways of representing graphs, and the efficiency of algorithms; (5) Lower bounds of computational complexity; (6) Examples of optimal and `good' algorithms; (7) Problems with polynomial complexity; (8) Problems for which the existence of algorithms with polynomial complexity is not possible; (9) NP-complete problems; (10) Conclusion; Bibliography.
Źródło:
Mathematica Applicanda; 1980, 8, 16
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the efficiency of graph coloring algorithms
Autorzy:
Kubale, Marek
Powiązania:
https://bibliotekanauki.pl/articles/748571.pdf
Data publikacji:
1982
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Computational complexity and efficiency of algorithms
Coloring of graphs and hypergraphs
Graph theory
Opis:
.
This paper discusses the computational efficiency and the number of colors used by the following algorithms for coloring vertices of graphs: sequential coloring and sequential coloring with interchange algorithms for a largest-first and a smallest-last orderings of vertices, the coloring-pairs algorithm, and the approximately maximum independent set algorithm. Each algorithm is supplied with a Pascal-like program, time complexity in terms of the size of a graph, and worst-case behaviour. In conclusion, some computational results are included with support the estimations and suggest the sequential coloring with interchange algorithm for a largest-first vertex ordering as a method which uses the least number of colors for uniformly distributed random graphs.
Źródło:
Mathematica Applicanda; 1982, 10, 19
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of estimators of CBS function parameters, obtained by the use Quenouille and filtration methods
Analiza własności estymatorów parametrów funkcji CES wg metodi Quenouillea i filtracji
Autorzy:
Klepacz, Halina
Żółtowska, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/905022.pdf
Data publikacji:
1993
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
CES function
Quenouille and filtration methods of estimation
efficiency
Opis:
Przeprowadzone eksperymenty numeryczne nie pozwalają ustalić, która ze stosowanych metod estymacji (Quenouille'a i iiltracji) jest bardziej efektywna, mimo że oťrzymane w wyniku ich stosowania estymatory nie są identyczne. Wydaje się, że ze względu na różne asymetrie ich rozkładów i różne wielkości ich obciążeń, dobrze byłoby rozważyć nowe estymatory jako ich średnie ważone.
By numerical experiments the relative efficiency of Quenouille and filtration estimators was established. Assymotry of distribution of estimators and Masodness are the reasons for suggestion of weighting method.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 1993, 132
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Défenseur des droits civiques (lombudsman) - possibilités et limites de son efficacité
Autorzy:
Zieliński, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/43358305.pdf
Data publikacji:
1995-12-31
Wydawca:
Polska Akademia Nauk. Instytut Nauk Prawnych PAN
Tematy:
defender
civil rights
limitations
efficiency
Polska
post-communist
constitutional law
democracy
supporter
ombudsman
Opis:
The article presents the circumstances of introducing the institution of ombudsman (called the defender of civil rights) in 1987 and its role during the political transformation in Poland. This independent from other authorities institution which was responsible only before the Diet was not known in other socialist countries. It is significant that the first election of ombudsman in 1987 were conducted just two years before the political transformation and the change of the regime in Poland. This was the way the Communist Party wanted to secure its influence, but the first person – Prof. Ewa Łętowska – chosen for this role, occurred to use the independence legally granted for this institution.The problem highlighted in the further part of the article, is the role of the ombudsman in the transitional period, after the fall of communism. Should it act in accordance to the legal acts adopted in the former political system (and not yet derogated), even though these acts were no longer compatible with the principles of the democratic state of law or should it act independently, what would be in conflict with the rule of acting within the law. Finally, the ombudsman, as well as the Constitutional Court, adopted the principle of the protection of acquired rights, under condition they were acquired without infringement of the principle of citizens’ equality before the law (so which were not obtained as the privileges granted for the narrow group of people).After the transformation, from 1991 the role of the ombudsman was not only to act in case of the violation of civil rights but also to act preventively, each time when it occurs that the projected legal act may infringe the civil rights granted in the Constitution or in the other legal acts equally for every citizen regardless their ideological or religious background. The basis of the ombudsman’s activity should be constituted by the universal human values.The ombudsman is elected by the Diet for 4 years and cannot be called off before the end of the mandate period, except three, listed situations. The person chosen should stand out with great professional experience and deep knowledge of law, high authority and moral qualifications, as well as great sensitiveness to the social problems.The ombudsman can act through judicial means, as the requests to the Constitutional Court or to the Supreme Court and the demand of the interpretation of legal act. He can exercise also legislation initiative and administrative control.At the beginning of its functioning, in 1991-1993, the institution of ombudsman was the aim of political attacks, especially by Catholic groups, who wanted their interest to be represented in the first place. Nevertheless, the ombudsman seems to strengthen its independence and neutrality and in the effect, after 1993 it gained the due respect and authority of one of the most important institutions in the democratic state of law.
Źródło:
Droit Polonais Contemporain; 1995, 1-4; 71-84
0070-7325
Pojawia się w:
Droit Polonais Contemporain
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szerokosc miedzyrzedzi w uprawie ziemniaka
Autorzy:
Jablonski, K
Powiązania:
https://bibliotekanauki.pl/articles/835972.pdf
Data publikacji:
1996
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
mechanizacja pracy
naklady pracy
maszyny rolnicze
ziemniaki
uprawa roslin
plony
zuzycie paliwa
wydajnosc efektywna
szerokosc miedzyrzedzi
work mechanization
work input
agricultural machine
potato
plant cultivation
yield
fuel consumption
efficiency
interrow width
Źródło:
Ziemniak Polski; 1996, 1; 11-17
1425-4263
Pojawia się w:
Ziemniak Polski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of 3D flow in axial turbomachines
Autorzy:
Yershov, S.
Rusanov, A. V.
Gardzielewicz, A.
Lampart, P.
Świrdyczuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1953978.pdf
Data publikacji:
1998
Wydawca:
Politechnika Gdańska
Tematy:
numerical simulation
axial turbomachines
3D flow
3D viscous compressible flow
Navier-Stokes equation
ENO reconstruction
computational efficiency
computational fluid dynamics CFD
Godunov-type upwind differencing
Opis:
The paper is intended to describe a method for the calculation of 3D viscous compressible (subsonic or supersonic) flow in axial turbomachines described in the form of thin-layer Reynolds-averaged Navier-Stokes equations. The method draws on Godunov-type upwind differencing and ENO reconstruction suggested by Harten (1987), so as to assure monotonicity preservation and high accuracy of computational results. The computational efficiency is achieved thanks to the implementation of a simplified H-type multi-grid approach and delta -form implicit step. Turbulent effects are simulated with the help of a modified algebraic model of Baldwin-Lomax (1978). This method was at the foundation of a computer code-a complex software package to calculate 3D flow in multi-stage turbomachines that allows us to obtain local characteristics, like temperature, pressure, density or velocity distributions, as well as global characteristics, such as flow rates, stage reaction, flow efficiency for the considered turbine/compressor stage. The paper also gives selected results of computation of a number of turbomachinery cascades, showing that these results agree reasonably well with the available experimental data.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1998, 2, 2; 319-347
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On two tests based on disjoint m-spacings
Autorzy:
Czekała, Franciszek
Powiązania:
https://bibliotekanauki.pl/articles/1339016.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
step densities
disjoint m-spacings
limit distributions
Bahadur approximate efficiency
Opis:
This paper is concerned with the properties of two statistics based on the logarithms of disjoint m-spacings. The asymptotic normality is established in an elementary way and exact and asymptotic means and variances are computed in the case of uniform distribution on the interval [0,1]. This result is generalized to the case when the sample is drawn from a distribution with positive step density on [0,1]. Bahadur approximate efficiency of tests based on those statistics is found for such alternatives.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 3; 359-373
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ventilation Flow Organization for Efficient Elimination of Contaminated Air
Autorzy:
Holmberg, S.
Powiązania:
https://bibliotekanauki.pl/articles/90628.pdf
Data publikacji:
1998
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
ventilation principles
age of air
air change efficiency
air distribution
contaminant control
wentylacja
powietrze
kontrola zanieczyszczeń
Opis:
Displacement ventilation and well-organized ventilation flow structures are emphasized. Perhaps the biggest advantage of displacement ventilation is its increased effectiveness in removing pollutants from a ventilated space and the efficient use of ventilation air. Several questions on how the systems should be designed to achieve optimal efficiency are still unanswered. Small variations in room geometries and air supply arrangements can totally change the conditions. Results from this investigation show the importance of an even distribution of the incoming supply air, numerically calculated age-of-air values and the influence of residual tracer concentrations on rneasured mean values for the age of air.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1998, 4, 1; 85-96
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the Protection Efficiency and Comfort of Personal Protective Equipment in Real Conditions of Use
Autorzy:
Mayer, A.
Korhonen, E.
Powiązania:
https://bibliotekanauki.pl/articles/90594.pdf
Data publikacji:
1999
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
personal protective equipment
efficiency
ergonomics
standards
ergonomia
sprzęt ochrony osobistej
wydajność
standardy
Opis:
The lack of scientific and technical knowledge in certain complex fields, together with schedule constraints, have lead to adopting in EN standards insufficiently validated tests, relying sometimes on an empirical approach. Thus, even personal protective equipment (PPE) with positive results in tests required by the standards can nevertheless prove to be unsatisfactory when used at work. Several research projects have already been carried out on equipment, fail arresting systems, protective clothing, and gloves by several health and safety institutes in Europe. The results would suggest practical solutions to improve the representative of several European Committee for Standardization (CEN) test methods and to focus more on informing and training workers on the manner of wearing PPE, in particular respiratory protective equipment or hearing protectors.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1999, 5, 3; 347-360
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constructing improvement plan for inputs through dialogue with DM about DEA-Efficiency for DMUs
Autorzy:
Uemura, Y.
Powiązania:
https://bibliotekanauki.pl/articles/206812.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
evaluation efficiency
partial improvement plan
sensitivity analysis
Opis:
Evaluation of efficiency of the DMUs (Decision Making Units) in a company is a very important problem. Thus, the studies of evaluation of efficiency are being actively carried out on the basis of the production functions, for example Cobb-Douglas production function and fuzzy loglinear production function (fuzzy Cobb-Douglas model). Recently, DEA (Data Envelopment Analysis) was applied to evaluation of efficiency, in the sense of benchmarking evaluation. After having evaluated DMUs by DEA, we obtain the improvement plan for every input in the inefficient DMUs. Though we many not be able to decrease inputs at one time according to the DEA plan, it is natural to construct some phased improvement plans for decreasing the inputs. First, we propose to support the construction of some phased improvement plans by the sensitivity analysis for the evaluated efficiency by applicatiion of definite limits to the decrease of inputs. Second, we evaluate this method by applying it to the case of bank data.
Źródło:
Control and Cybernetics; 1999, 28, 1; 133-139
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryteria wyboru techniki produkcji w warunkach występowania bezrobocia
Criteria of choosing a production technique in circumstances of widespread unemployment
Autorzy:
Adamczyk, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/415569.pdf
Data publikacji:
1999
Wydawca:
Małopolska Wyższa Szkoła Ekonomiczna w Tarnowie
Tematy:
kapitałochłonność produkcji
racjonalność zatrudnienia
wydajność pracy
bezrobocie
materiały konferencyjne
capital consumption of production
rationalisation of employment
labour efficiency
unemployment
conference materials
Opis:
Dążenie do racjonalnego zatrudnienia staje się jednym z podstawowych zadań, które pojawiają się przed polityką gospodarczą państw odbudowujących gospodarkę rynkową. Zadanie to może być realizowane różnymi sposobami przy założeniu, że fundusz inwestycyjny jest wyznaczony przez obiektywne możliwości gospodarcze kraju i ustalona została struktura przyrostu dochodu narodowego, tempo wzrostu zatrudnienia, a więc i proces likwidacji istniejących rezerw siły roboczej uzależniony jest od poziomu kapitałochłonności przyjętych technik produkcji. W artykule autor rozpatruje podstawowe argumenty za i przeciw stosowaniu bardziej lub mniej kapitałochłonnych technik produkcji i próbuje ustalić długookresowe efekty proponowanych rozwiązań.
Selection of generated technique of production at the level of national economy, contributes to balancing available labour resources with investment funds. Techniques, which are more capital consuming, permit to maximize economic surplus which in a short period of time is obtained at the cost of an unemployment increase, whereas during a long period of the time the economic surplus makes the investment fund stronger, which stimulates an economic growth and advances the process of unemployment reduction. The second approach basing on lowering the capital-consuming techniques of production, causes an employment increase on the one hand but a decrease of work efficiency on the other hand. The choice of higher or lower consumption of capital is actually neither a choice of "better" nor "worse" production techniques.
Źródło:
Zeszyty Naukowe Małopolskiej Wyższej Szkoły Ekonomicznej w Tarnowie; 1999, 1; 59-73
1506-2635
Pojawia się w:
Zeszyty Naukowe Małopolskiej Wyższej Szkoły Ekonomicznej w Tarnowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study of the Nonsteady-State Filtration Process in a Fibrous Material in Conditions of Real Dust Loading
Autorzy:
Majchrzycka, K.
Powiązania:
https://bibliotekanauki.pl/articles/90344.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
air filtration
fibrous filtering material
particular deposition
filtration efficiency
clogging test
gas flow resistance
model of nonsteady-state filtration
filtracja powietrza
materiał filtracyjny
skuteczność filtracji
opór przepływu gazu
Opis:
The study concerns ways to describe filtration efficiency and gas flow resistance while particles are deposited in fibrous respiratory protective filters under conditions characteristic for their use. The performance of fibrous filter materials of varied structure and electrostatic properties was studied, using polydisperse coarse-grained aerosols and submicron aerosols of sodium chloride. Evidence was found that changes in airflow resistance depended to a large extent on air humidity and the concentration of the aerosol. A relationship was also found between the electrostatic properties of filter media and their decreasing efficiency with time. A numerical model was developed to simulate the phenomenon of nonsteady-state filtration for 2 mechanisms of deposition, which permitted assessment of the filtration characteristics of filter media of any design and in any conditions.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, Zeszyt Specjalny; 45-58
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological efficiency of the Brookhaven Medical Research Reactor mixed neutron beam estimated from gene mutations in Tradescantia stamen hair cells assay
Autorzy:
Cebulska-Wasilewska, A.
Schneider, K.
Capała, J.
Coderre, J.
Powiązania:
https://bibliotekanauki.pl/articles/146139.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
neutrons
relative biological efficiency
Tradescantia
Opis:
The relative biological effectiveness of low energy neutrons for the induction of various abnormalities in Tradescantia stamen hair mutation (Trad-SH) assay was studied using two clones (T-4430 and T-02), heterozygous for flower color. Dose response relationships for gene mutations induced in somatic cells of Trad-SH were investigated after irradiation with a mixed neutron beam of the Brookhaven Medical Research Reactor (BMRR), currently used in a clinical trial of boron neutron capture therapy (BNCT) for glioblastoma. To establish the RBE (relative biological effectiveness) of the BMRR beam in the induction of various biological end-points in Tradescantia, irradiation with various doses of g-rays was also performed. After irradiation all plants were cultivated several days at Brookhaven National Laboratory (BNL), the transported to Poland for screening the biological end-points. Due to the post-exposure treatment, all plants showed high levels of lethal events and alteration of the cell cycle. Plants of clone 4430 were more reactive to post-treatment conditions, resulting in decreased blooming efficiency that affected the statistics. Slope coefficients estimated from the dose response curves for gene mutation frequencies allowed the evaluation of ranges for the maximal RBE values of the applied beam vs. g-rays as 6.0 and 5.4 for the cells of T-02 and T-4430, respectively. Estimated fraction of doses from neutrons and corresponding biological effects for the clones T-02 and T-4430 allowed to evaluate the RBE values for neutrons part in the beam as 32.3 and 45.4, respectively.
Źródło:
Nukleonika; 2000, 45, 2; 115-119
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 3498

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