Autor: Jaroszewicz, Jerzy. - Katalog OPAC zbiorów

Tytuł:: Design of the vibrostabilisation stand for reducing residual stresses in discs used in the construction of multi-plate clutches and brakes
Autorzy:: Jaroszewicz, Jerzy
Łukaszewicz, Krzysztof
Antonyuk, Vladimir
Powiązania:: https://bibliotekanauki.pl/articles/386311.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: heavy vehicles
friction disc
multidisc brakes
vibratory stabilization
Opis:: Heavy-duty, oil-cooled brake discs (MMOTs) are often used in heavy-duty brake systems manufactured by companies such as Caterpilar, Clark, Komatsu and Liebherr. These discs are usually made of special steels, and in most cases, the flatness of the working surfaces should not exceed 0.15–0.30 mm. Although the technological processes of friction disc production include several stages of heat treatment and grinding, the required accuracy is not achieved in some cases. In addition, the remaining residual stresses lead to the deformation of the discs during their lifetime. In production practice, three methods are used to reduce residual stresses: thermo-fixing, dynamic stabilisation and vibratory stabilisation consisting in bringing discs to transverse resonance vibrations and maintaining resonance until significant stress reduction. The article proposes a method of stabilising the discs using the resonance phenomenon at the first few frequencies. In this article, Cauchy’s function method and characteristic series method are used to develop solution value problem for clamped circular plates with discrete inclusions as concentrated masses and springs. Calculation methods for quick estimation of the own frequency of discs with additional ring mass enabling the use of low power vibration inductors are presented. The use of a special membrane and a pneumatic cushion in the construction of the stand allows to induce vibrations of higher frequencies.
Źródło:: Acta Mechanica et Automatica; 2019, 13, 1; 37-44
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Wybrane aspekty badań pokryć antykorozyjnych na przykładzie komory solnej i elementów maszyn łąkarskich w przedsiębiorstwie SaMASZ
Selected aspects of corrosion protection tests on the example of the salt chamber and elementsmeadow machines at the SaMASZ compan
Autorzy:: Jaroszewicz, Jerzy
Sosna, Karolina
Mikutowicz, Angelika
Powiązania:: https://bibliotekanauki.pl/articles/270354.pdf
Data publikacji:: 2019
Wydawca:: Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:: komora solna
ubytki korozyjne
procesy technologiczne
salt chamber
corrosion losses
technological processes
Opis:: W pracy zaprezentowano wybrane aspekty badań pokryć antykorozyjnych elementów maszyn. Omówiono komorę solną, która jest wykorzystywana w metodzie sprawdzania pokryć antykorozyjnych. W komorze rozpylony został chlorek sodu. Jego zadaniem jest pokazanie, która powłoka spełnia wymagania oraz która powinna zostać jeszcze dopracowana (znalezienie przyczyny odpowiedzialnej za negatywny wynik badania). Jest to badanie, które wykonuje się w temperaturze 35°C i 5% NaCl w atmosferze. Badania w rozpylonej obojętnej solance (NSS) przeprowadzone są wg PN-EN ISO 9227 oraz ISO 3574. W pracy przedstawiono wyniki badań pomiarów próbek, które zostały podzielone ze względu na technologie przygotowania powierzchni, śrutowanie, producenta farby, grubość powłoki oraz stopień odwarstwienia.
The paper presents selected aspects of testing corrosion protection of machine elements. The salt chamber is discussed, which is used in the method of checking anti-corrosion coatings. Sodium chloride was sprayed into the chamber. His task is to show which coating meets the requirements and which should be further refined (finding the reason responsible for the negative test result). This is a test that is performed at 35°C and 5% NaCl in the atmosphere. Tests in atomized neutral brine (NSS) are carried out according to PN-EN ISO 9227 and ISO 3574. The paper presents test results of sample measurements, which were divided by surface preparation technologies, shot blasting, paint manufacturer, coating thickness and degree of detachment.
Źródło:: Aparatura Badawcza i Dydaktyczna; 2019, 24, 3; 216-220
2392-1765
Pojawia się w:: Aparatura Badawcza i Dydaktyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: How does the Polish population feel about their sex life? – A nationwide survey research
Autorzy:: Ślusarz, Krystian
Sobala-Szczygieł, Barbara
Jaroszewicz, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1065317.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: relationship
safe sex
sex life
sexual assertiveness
sexual satisfaction
Opis:: Sexuality is a significant pillar of a romantic relationship, and sexual satisfaction is closely related to the stability of the relationship as well as satisfaction associated with it. The aim of this paper was to briefly characterize the sex life of Poles, especially regarding safe sex, sexual assertiveness and satisfaction with sexual life. A Poland-wide on-line survey was conducted between January and March 2019. 2205 anonymous answers were analyzed. To compare the knowledge of heterosexual and non-heterosexual persons, medical students were excluded from both groups. We identified three studied populations: heterosexuals excluding medical students, non-heterosexuals excluding medical students and medical students. Participants were asked for taking a stance to a few statements. The majority of respondents declared that their sexual contacts are always as safe as they want and they can easily refuse sexual contact with another person. Furthermore, most of the respondents were also satisfied with their sex life, especially the group of medical students.
Źródło:: World Scientific News; 2019, 135; 249-260
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Assessment of the knowledge about HIV-infectious materials in Poland
Autorzy:: Ślusarz, Krystian
Sobala-Szczygieł, Barbara
Jaroszewicz, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1076602.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: HIV infection
HIV infectious materials
Polska
survey
Opis:: Malignancies were one of the earliest diagnosed manifestations that resulted in the description of acquired immunodeficiency syndrome (AIDS). Most cancers in AIDS patients are associated with coinfection with oncogenic viruses. Knowledge and public awareness about HIV infectious materials are important elements in preventing the spread of HIV infections. The aim of the study was to assess the knowledge about HIV infectious materials among three populations in Poland. A Poland-wide on-line survey was conducted and 2205 anonymous answers were analysed. Almost half of the answers came from students, of which 40% were medical students.
Źródło:: World News of Natural Sciences; 2019, 27; 38-49
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Knowledge about HIV tests in Poland
Autorzy:: Ślusarz, Krystian
Sobala-Szczygieł, Barbara
Jaroszewicz, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1058085.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: AIDS
HIV pandemic
HIV testing
Opis:: The first people were infected with HIV in the early twentieth century. However, due to the non-specific clinical symptoms and long asymptomatic period of infection, the world became aware of the virus only many years later. HIV testing is one of the basic elements of HIV prevention. Other elements include the use of condoms, pharmacological prophylaxis and, in the case of infection, antiretroviral treatment. Knowledge of places where it is possible to get tested for HIV in a free way and basic information about tests seem to be important in reducing HIV transmission. In this work respondents from Poland were asked a few questions about HIV testing.
Źródło:: World Scientific News; 2019, 134, 2; 175-186
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Contraceptive preferences among Polish youth
Autorzy:: Ślusarz, Krystian
Sobala-Szczygieł, Barbara
Jaroszewicz, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1058105.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: birth control
condom
contraception
contraceptive implant
intrauterine device
oral contraceptive pills
Opis:: Contraception is a pillar of reducing the rate of pregnancies among young people. Knowledge about the possibilities and characteristics of available methods of contraception is one of the key elements of sex education. It allows planned reproduction and can prevent sexually transmitted infections. In order to assess the knowledge about contraception among Polish youth, we analyzed 2205 collected responses.
Źródło:: World Scientific News; 2019, 134, 2; 258-269
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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