Autor: Stachowicz, E. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of inertia moment of infantry fighting vehicle turret on accuracy of aiming at a target and tracking of a target
Autorzy:: Papliński, K. M.
Stachowicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/244515.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combat vehicle
fire control system
gun stabilizer
amplitude of first overshoot
Opis:: In the paper was tested one of combat vehicles that is highly dynamic military vehicles, combining a high striking and fire power with high mobility and manoeuvrability. Were presented the mechanism of transfer of disturbance from the ground on the angular stabilized turret of the vehicle. Hull vibration caused by bumps in the ground. Angular and axial displacement of vehicle are the input signals acting on the turret and the gun. Two-axis stabilisation system compensates the velocities of the vehicle. Stabilisation system, automatically maintain the position of the turret at a fixed bearing in space. In spate of any motion of the vehicle in roll (hall transversal vibration) or in yaw (hall "snake-like" vibration). Torques and forces acting on the rigid body of combat vehicle turret are written in equations of motion. To examine the effect of mass inertia moment of the IFV turret on the size of first overshoot (to confirm the theoretical considerations) performed a simple experiment. Was measured the size of the angle of the first overshoot of the turret when braking rotating turret with a maximum angular velocity. Measurements were made on the IFV turret in the previously existing configuration, and when mounted on it extra weight. An experiment confirms the theoretical considerations. The results of measurements show that an increase of approximately 8 per cent of the mass moment of inertia of the turret causes about 16 per cent increase in the amplitude of the first overshoot.
Źródło:: Journal of KONES; 2011, 18, 1; 411-416
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of exciting force amplitude on occurrence of parametric resonance phenomenon in vibrating screen
Autorzy:: Bąk, Ł.
Stachowicz, E.
Noga, S.
Skrzat, A.
Powiązania:: https://bibliotekanauki.pl/articles/128313.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: vibrating screen
parametric resonance
natural frequencies
przesiewacz wibracyjny
rezonans parametryczny
drgania własne
Opis:: The paper considers the effect of exciting force amplitude on occurrence of parametric resonance phenomenon in vibrating screens by using experimental methods. The measuring test is performed for three cases of excitation force levels. For each force level sieve parametric vibrations are excited by using proper excitation frequency. It is shown that an increase of the excitation force results in an increase in the sieve vibration amplitude. The dependence between excitation force and sieve parametric vibrations is nonlinear. The value of excitation force has an effect on the sieve vibration mode shape. Two vibration mode shapes are detected. It is found that the excitation frequency influenced the vibration amplitude. An increase of sieve preload has no effect on the amplitude level, however it results in an increase of the sieve vibration frequency.
Źródło:: Vibrations in Physical Systems; 2016, 27; 42-46
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analiza efektów energetycznych termomodernizacji wielorodzinnych budynków mieszkalnych
Autorzy:: Fedorczak-Cisak, M.
Franczyk, E.
Konarski, M.
Stachowicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/363046.pdf
Data publikacji:: 2005
Wydawca:: Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:: termomodernizacja budynków
thermomodernization
Opis:: W artykule analizowano parametry energetyczne wielorodzinnych budynków mieszkalnych przed oraz po termomodemizacji. Istotą analizy było porównywanie wartości obliczeniowych i rzeczywistych oraz poszukiwanie powodów rozbieżności. Analizę przeprowadzono z uwzględnieniem roku powstania budynków, technologii wykonania, zakresu termo- modernizacji, powierzchni przeszklenia, zastosowania podzielników kosztów ogrzewania oraz stosunku zamówionej mocy grzewczej do wartości obliczeniowych.
This paper presents analysis of energetistic parameters of multi-story buildings before and after thermo- modernization. The essence of analysis is comparison of theoretical and real values, and research of divergence reasons. The analysis includes year of building erection, realization technology, thermo- modernization range and relations between nominal heat power and theoretical values.
Źródło:: Fizyka Budowli w Teorii i Praktyce; 2005, T. 1; 66-79
1734-4891
Pojawia się w:: Fizyka Budowli w Teorii i Praktyce
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Nutrition habits and frequency of consumption of selected food products by the residents of urban and rural area from the Subcarpathian voivodeship
Autorzy:: Szalajko, M.
Stachowicz, W.
Dobosz, M.
Szalankiewicz, M.
Sokal, A.
Luszczki, E.
Powiązania:: https://bibliotekanauki.pl/articles/2086666.pdf
Data publikacji:: 2021
Wydawca:: Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:: eating habits
food consumption frequency
socio-demographic conditions
village
city
adults
Opis:: Background. The dynamic development and change of rural lifestyle patterns towards urban patterns has been noticeable since the second half of the 20th century. Nutrition, as well as the lifestyle in urban and rural areas, has undergone a process of urbanization, which is evidenced by the following an increasing number of overweight people. Objective. The aim of the study was to compare eating habits and frequency of consumption of selected groups of products between the urban and rural residents from the Subcarpathian voivodeship. Material and methods. The survey was carried out on a sample of 279 persons from urban and rural areas of Subcarpathian voivodeship. In this study, the diagnostic survey method consisting of 3 (different) parts was used. To check the significance of differences, U Mann-Whitney and Kruskal-Wallis tests were used; whereas correlations between variables were determined by the Spearman's rank of correlation coefficient and Pearson's chi-quadrat test. Results. In the part concerning eating habits, statistically significant differences occurred among others; for the circumstances of eating meals, the most commonly consumed snacks, food processing techniques and the most frequently selected fat. In the part concerning the frequency of consumption of individual product groups, significant differences occurred among others; for dairy products, grain products, fast food, alcohol. There was a correlation between the frequency of consumption of individual products and socioeconomic status. Conclusions. The quality of the diet and eating habits of urban and rural residents of Subcarpathian voivodeship does not differ significantly. The detected differences in eating habits were more influenced by the education and socioeconomic status of the examined group than the place of residence.
Źródło:: Roczniki Państwowego Zakładu Higieny; 2021, 72, 2; 165-174
0035-7715
Pojawia się w:: Roczniki Państwowego Zakładu Higieny
Dostawca treści:: Biblioteka Nauki