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Wyświetlanie 1-14 z 14
Tytuł:
The Impact of the Russian-Ukrainian Conflict on the Security of the Republic of Poland
Wpływ konfliktu rosyjsko-ukraińskiego na bezpieczeństwo Rzeczypospolitej Polskiej
Autorzy:
Jurek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/30145264.pdf
Data publikacji:
2022-12-31
Wydawca:
Collegium Witelona Uczelnia Państwowa
Tematy:
war
Ukraine
Polska
conflict
wojna
Ukraina
Polska
konflikt
Opis:
This article is devoted to the presentation of the Russian-Ukrainian conflict in the context of security of the Third Republic of Poland, as well as checking and analysing the potential threats related to the warfare in the east. Potential and current threats that may affect Poland’s security were also presented. This article also measures the level of tolerance of people from Ukraine in Poland and how relations with our eastern neighbours have been developing in recent years. The most important issue is to provide the answer to the question whether the security of our country is or may be violated.
Niniejszy artykuł poświęcony jest przedstawieniu konfliktu rosyjsko-ukraińskiego w kontekście bezpieczeństwa III Rzeczpospolitej Polskiej, jak również ma na celu sprawdzenie jak i przeanalizowanie potencjalnych zagrożeń związanych z wojną na wschodzie. Zostały również przedstawione potencjalne jak i obecne zagrożenia, które mogą mieć wpływ na naruszenie bezpieczeństwa Polski. W niniejszym artykule został również pokazany poziom tolerancji osób z Ukrainy w Polsce oraz to, jak w ostatnich latach rozwijały się relacje z naszym wschodnim sąsiadem. Najważniejszą kwestią jest przedstawienie odpowiedzi na pytanie, czy bezpieczeństwo naszego kraju jest lub może być naruszone.
Źródło:
Zeszyty Naukowe Collegium Witelona; 2022, 4, 45; 85-96
2956-302X
2956-3208
Pojawia się w:
Zeszyty Naukowe Collegium Witelona
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Terrorism: A Contemporary Threat to the Existence of People in the World
Terroryzm współczesnym zagrożeniem dla prawidłowej egzystencji ludzi na świecie
Autorzy:
Jurek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/28395203.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Pomorski w Słupsku
Tematy:
terroryzm
bezpieczeństwo
zagrożenie
uchodźcy
terrorism
security
threat
refugees
Opis:
Terrorism is one of the biggest threats around the world. Academics and people associated with politics as well as the media are anticipating the next movements of organisations such as Al-Qaida, Hamas and ISIS. It is important to remember that the events of 11 September 2001 revived all sorts of conversations about terrorism and its effects not only in the USA, but all over the world. The reason for such discussions was the attack on the WTC. This incident showed and made everyone realise that terrorism is not a local but a global threat. Suicide bombing is somehow no longer as big a problem as it was a few years ago, and the terrorists themselves have moved with the times and started to operate by manipulating the internet and stock markets in order to crash the economy from within. Terrorism has shown that it has links with and influences politics. Terrorist organisations have no correlation whatsoever with existing international laws and regulations within a country. It can be said that terrorist activities manifest themselves through certain arrangements within a given terrorist organisation and these are most important for its members to achieve their goals.
Terroryzm to jedno z największych zagrożeń na całym świecie. Naukowcy, w tym ludzie powiązani z polityką jak i mediami, oczekują kolejnych ruchów organizacji takich jak Al-Kaida czy Hamas lub ISIS. Należy pamiętać, że wydarzenia z dnia 11 września 2001 roku ożywiły wszelakie rozmowy o terroryzmie i ich skutkach nie tylko w USA ale i na całym świecie. Powodem takowych rozmów było nic innego jak zamach na WTC. Owy incydent pokazał i uświadomił wszystkim, że terroryzm to nie jest zagrożenie lokalne a globalne. Terroryzm samobójczy przestał poniekąd być już aż tak wielkim problemem jak kilka lat temu, a sami terroryści poszli z duchem czasu i zaczęli działać poprzez manipulacje w internecie jak i na giełdach papierów wartościowych, ażeby rozbić gospodarkę od środka. Sam terroryzm ma powiązania z polityką i na nią oddziałuje. Organizacje terrorystyczne nie mają żadnych korelacji z istniejącymi prawami międzynarodowymi jak i zarządzeniami wewnątrz danego kraju. Można stwierdzić, że działania terrorystyczne przejawiają się poprzez pewne ustalenia wewnątrz danej organizacji terrorystycznej i są one dla członków najważniejsze, aby osiągnąć wyznaczone cele.
Źródło:
Studia nad Bezpieczeństwem; 2022, 7; 59-67
2543-7321
Pojawia się w:
Studia nad Bezpieczeństwem
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Byzantine Themes in Polish High School Liberal Arts Education
Autorzy:
Jurek, Krzysztof
Kozieł, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/682130.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Byzantium
national curriculum
teaching history
Byzantine motifs
Opis:
The authors focus how Byzantine motifs are presented in the teaching of humanities subjects. The question of the presence of Byzantine motifs is essentially one about the presence of Byzantine heritage in Polish culture. With reference to two school subjects – Polish and History – the authors seek to establish what Polish school students are taught about the reach of Byzantine culture. Present-day teaching of both political and cultural history is underpinned by Occidentalism. Only occasionally is attention paid to the “Eastern” features of Poland’s past. A good example of this is the treatment of one of the most important Polish literary texts, the school perennial, Bogurodzica. This draws on Greek religious hymns, contain words originating in the Greek liturgy, and also alludes to a particular type of icon. Accordingly, the connections between the oldest Polish literary text and Byzantine culture are very clear. However, when classroom teachers discuss Bogurodzica with their pupils, detailing the above-mentioned features, are they aware that this text is an epitome of the presence of Byzantine motifs in Polish literature? Apparently not. With regard to the teaching of history, Byzantine motifs can be approached from at least three angles; in terms of imperial political events, in terms of religious (Eastern rite) aspects of Byzantine culture, and finally in terms of awareness of connections between Polish culture and Eastern rite Christianity, as well as Eastern nations and states viewed as heirs of Byzantine culture. In Polish history there has been a side-lining of the nation’s break with Eastern Christianity even though during certain periods this was the faith of half the Commonwealth’s inhabitants. The marginalisation of this topic does not simply impose a limit on knowledge but it prevents the understanding of particular aspects of our history.
Źródło:
Studia Ceranea; 2019, 9; 251-258
2084-140X
2449-8378
Pojawia się w:
Studia Ceranea
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Older People, Ageing and Old Age in the Light of Some Public Opinion Surveys in Poland
Autorzy:
Jurek, Krzysztof
Dobrowolska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1832336.pdf
Data publikacji:
2020-04-30
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
ludzie starzy
starość
starzenie się
badania opinii społecznej
older people
old age
ageing
public opinion surveys
Opis:
Ludzie starzy, starzenie się i starość w świetle wybranych badań opinii społecznej w Polsce Niniejszy artykuł bazuje na analizie sondaży przeprowadzonych przez Główny Urząd Statystyczny oraz Centrum Badania Opinii Społecznej. Artykuł podzielono na cztery części. W pierwszej zreferowano wyniki badań odnoszące się do granicy starości, zarówno tej duchowej, jak i fizycznej. W części drugiej przedstawiono opinie Polaków na temat starzenia się, częstotliwość myślenia na temat własnej starości, obawy przed starością. W części trzeciej opisano postawy wobec osób starszych w Polsce. Wskazane bloki tematyczne poprzedza krótka charakterystyka demograficzna sytuacji ludnościowej Polski (dane GUS, Eurostat i ONZ) oraz charakterystyka społeczna przeciętnego Polaka po 60 roku życia.
This paper is based on the analysis of surveys led by Central Statistical Office of Poland and Public Opinion Research Center. The article consists of four parts. In the first one, the outcomes of the research related to the boundaries of old age, both spiritual and physical, have been described. The second part brings forward the opinions of Poles about ageing, the frequency with which Poles reflect upon their own old age, concerns related to old age. The third part is a description of attitudes towards older people in Poland. The indicated parts are preceded by a short demographic characterisation of the demographic situation in Poland (data from CSO, Eurostat and UN) and social characterisation of an average Pole aged above 60 years.
Źródło:
Roczniki Nauk Społecznych; 2017, 45, 2; 7-25
0137-4176
Pojawia się w:
Roczniki Nauk Społecznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermogenic gases generated from coals and shales of the Upper Silesian and Lublin basins : hydrous pyrolysis approach
Autorzy:
Kotarba, Maciej J.
Bilkiewicz, Elżbieta
Jurek, Krzysztof
Waliczek, Marta
Więcław, Dariusz
Zych, Hieronim
Powiązania:
https://bibliotekanauki.pl/articles/2059608.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
hydrous pyrolysis gas
gaseous hydrocarbon
carbon dioxide
molecular nitrogen
stable C, H, N isotopes
Upper Silesian
Lublin Coal basins
Opis:
In order to provide a better characterization of the origin and volume of thermogenic gas generation hydrous pyrolysis (HP) experiments were performed on coals and shales at 330 and 360oC for 72 hours. The maturity range of coals and shales used for HP varies from 0.57 to 0.92% Ro. The maturity increase caused by HP at 330 and 360oC ranges from 1.32 to 1.39% and from 1.71 to 1.83%, respectively. δ13C of CH4, 2H6, C3H6 and n-C4H10 in HP gases versus their reciprocal C-number have a concave relationship, and therefore do not follow a linear trend. δ2H of CH4, 2H6 and C3H6 in HP gases versus their reciprocal H-number show both linear and convex-concave relationships. The growth of CO2 yields during HP was higher for shales than for coals. H2S yields from shales are higher than from coals, which can be connected with catalytic and adsorbed influence of shale matrix. H2 was also generated in notable quantities from water and organic matter of coals and bigger amounts from shales. N2 yields grow with the increase of Ro after 3oC HP and it is more enriched in 15N isotope than after 330C.
Źródło:
Geological Quarterly; 2021, 65, 2; 65: 26
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding of mobile platform elements made from mixed grades of high-strength steels
Autorzy:
Szczucka-Lasota, Bożena
Węgrzyn, Tomasz
Łazarz, Bogusław
Lukaszkowicz, Krzysztof
Jurek, Adam
Wilczyński, Krzysztof Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2091137.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
civil engineering
transport
mobile platforms
welding
inżynieria lądowa
platformy mobilne
spawanie
Opis:
In the mobile platform structure, there is an increasing necessity to weld steels from the various groups. For instance, it has become necessary to connect AHSS (Advanced High-Strength Steel) with fine-grained steels. This article verifies the possibility of obtaining accurate mixed welded joints from different grades of DOCOL 1400 steel (from the AHSS group) with S700 MC steel (from the fine-grained steel group). The structure, quality and mechanical properties of the obtained welded joints were thoroughly analysed. The joints were made at various welding speed with preheating to 80°C and without preheating.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2020, 107; 197--203
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Speech Understanding by Children Diagnosed with Delayed Verbal Development in the Context of Family Functioning
Autorzy:
Gerc, Krzysztof
Jurek, Marta
Powiązania:
https://bibliotekanauki.pl/articles/454202.pdf
Data publikacji:
2020
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
verbal development
child's understanding of speech
family functioning
ego-resiliency
Opis:
The assumptions of the own research presented in the article refer to the socio-interactive approach that assumes that learning and proper language acquisition by a child require cognitive activity, proper progress in cognitive development, and active - resulting from social relations - observation of adult speech. The research assumptions also take into account the importance of the autoregulatory function of language and systemic understanding of the concept of family. The aim of the study was to check the presence of the relationship between speech understanding by children with delayed verbal development and the various dimensions of their family functioning and ego-resiliency of parents. The study included a group of 72 well-cognitively functioning Polish children aged 5-7 with a diagnosis of delayed verbal development and their families selected using random and nonprobability sampling. The children were examined using the Polish Picture Vocabulary Test – Comprehension - version A (PPVT-C). Functioning of the families of the examined children was operationalized by the results of FACES IV by D. Olson (the Polish version of the scale was used); while the Ego Resiliency Scale was used to study resilience. The results of the conducted research indicate, among others, that families of children with lower scores on speech understanding present less favorable functioning profiles in the scope of selected dimensions of FACES -IV: Family Communication, Cohesion, Disengaged and Family Satisfaction. However, the relationship between the child's understanding of speech and other demographic variables such as parent's age, parent's gender, parent's education, marital status has not been confirmed. It was recognized that the results of the research will allow in the future to optimize the therapeutic services offered to children with verbal development disorders and their families in their natural environment, as well as to allow the presentation of appropriate strategies to support speech development (especially speech understanding abilities) in children. The creation of a group representing a certain type of language disorder will allow a better adaptation of the training program to the specific difficulties experienced by a child, as well as allow for more effective involvement of parents in preventive measures.
Źródło:
Multidisciplinary Journal of School Education; 2020, 17; 173-198
2543-7585
Pojawia się w:
Multidisciplinary Journal of School Education
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding of S355J+N low alloy steel elements in railway carriages structures
Autorzy:
Szczucka-Lasota, Bożena
Węgrzyn, Tomasz
Łazarz, Bogusław
Jurek, Adam
Wilczyński, Krzysztof I.
Powiązania:
https://bibliotekanauki.pl/articles/2091224.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transport
welding
carriages
spawanie
wagony
Opis:
Various types of structures and materials play an important role in the creation modern means of transport, including various grades of steel with different mechanical properties. For the rolling stock, proper operation and meeting the operational conditions is very important. Welded structures play an important role in the construction of various means of transport. Correct welding of carriages is important both in production and when carrying out various types of repairs. Each repair a carriage depends on its advancement and condition and the time of its operation. Each inspection for a refurbished carriage is defined either by the service life or the big distance traveled by the carriage. Important factor that may lead to damage is the effect of the load transported in the carriage. Therefore, the causes of the wear of the rolling stock are investigated and measures are taken to prevent any damage. The appropriate technical condition of the carriage also ensures safety on railroads for users and owners of the rolling stock. In the case of welded structures in carriages, it is influenced by poorly materials choice, incorrectly selected production processes and wrong selection of parameters. The goal of this paper is the mechanical properties analyse of weld low alloy steel structure of carriages after MAG welding using the parameters of the process. Thick-walled steel structures are used to build carriages, which is often a serious welding problem. The main role of welding conditions is connected with filer materials, welding technology, state of stress and temperature. In this paper, the properties of low alloy steel S3555J+N structures after MAG welding are presented. Furthermore, metallographic structure, tensile strength, bending test and impact toughness welded joints were analysed regarding welding parameters. The amount of acicular ferrite in WMD oxygen after welding was tested. Gas mixtures of argon and carbon dioxide with various percentage was used for shielding gas.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 112; Bibliogr. 12 poz.
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mięsaki macicy u młodych kobiet – analiza 17 przypadków
Uterine sarcoma in young women – analysis of 17 cases
Autorzy:
Olejek, Anita
Zamłyński, Jacek
Jędruś, Sylwia
Kellas-Ślęczka, Sylwia
Jurek, Agnieszka
Piękoś, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/908446.pdf
Data publikacji:
2007
Wydawca:
Medical Communications
Tematy:
adjuvant treatment
diagnosis
surgical treatment
uterine sarcoma
young women
Opis:
Uterine sarcoma are characterized by aggressive clinical course, poor prognosis and early development of metastases. According to various authors, they constitute 1-5% of all malignant uterine neoplasms. Already in clinical stage I, uterine sarcomas may produce metastases to pelvic lymph nodes in about 30% of the cases and to periaortal lymph nodes – in about 15%. Uterine sarcomas are particularly noteworthy because of limited experience in their management and lack of generally accepted diagnostic criteria and effective therapy. Preoperative diagnosis is possible in about 30% of the patients undergoing uterine cavity curettage. The treatment of choice of uterine sarcoma is radical surgery. The aim of this paper was clinical analysis of 17 patients aged 24-43, operated on for uterine sarcoma at the Department of Gynaecology, Obstetrics and Oncological Gynaecology of the Silesian Medical University in Bytom, Poland, since 2002 thru 2006. Analysed variables included: patients’ age, type and severity of ailments preceding diagnosis of uterine sarcoma, histopathologic diagnosis, type of surgical and adjuvant treatment implemented, treatment outcome and postoperative course. Microscopic examination of surgical specimens revealed leiomyosarcoma (47%), stromal sarcoma (29.4%) and less often necrotising leiomyosarcoma (11.8%), necrotising fibrosarcoma (5.9%) and undifferentiated sarcoma (5.9%). Upon completion of surgical treatment, all patients were referred for adjuvant treatment at the Department of Oncological Gynaecology of the Institute of Oncology in Gliwice, Poland.
Mięsaki macicy charakteryzują się agresywnym przebiegiem klinicznym, złym rokowaniem oraz wczesnym pojawianiem się przerzutów. Stanowią one według różnych opracowań 1-5% wszystkich nowotworów złośliwych macicy. Już w I stopniu zaawansowania klinicznego mięsaki macicy mogą dawać przerzuty do węzłów chłonnych miednicy mniejszej w ok. 30% przypadków, a do węzłów okołoaortalnych - w ok. 15%. Mięsaki macicy zasługują na szczególną uwagę ze względu na ograniczone doświadczenie w ich leczeniu oraz brak jednomyślności, jeżeli chodzi o kryteria rozpoznawania i skutecznego leczenia tych nowotworów. Rozpoznanie przedoperacyjne jest możliwe u ok. 30% chorych, u których przeprowadzono zabieg wyłyżeczkowania jamy macicy. W przypadku mięsaków macicy leczeniem z wyboru jest radykalny zabieg operacyjny. Celem pracy była analiza kliniczna 17 chorych w wieku od 24 do 43 lat leczonych operacyjnie z powodu mięsaków macicy w Katedrze i Oddziale Klinicznym Ginekologii, Położnictwa i Ginekologii Onkologicznej SUM w Bytomiu w latach 2002-2006. Ocenie poddano wiek pacjentek, rodzaj i nasilenie dolegliwości poprzedzających rozpoznanie mięsaka, rozpoznanie histopatologiczne nowotworu, rodzaj zastosowanego leczenia operacyjnego oraz uzupełniającego, a także efekty leczenia oraz przebieg pooperacyjny chorych. W pooperacyjnym badaniu histopatologicznym najczęściej rozpoznawano: leiomyosarcoma (47%), sarcoma stromale (29,4%), nieco rzadziej leiomyosarcoma necroticans (11,8%), fibrosarcoma necroticans (5,9%) oraz sarcoma undifferentiated (5,9%). Po zakończonym leczeniu operacyjnym wszystkie chore zostały skierowane do dalszego leczenia uzupełniającego do Kliniki Ginekologii Onkologicznej Instytutu Onkologii w Gliwicach.
Źródło:
Ginekologia Onkologiczna; 2007, 5, 4; 200-207
1731-5379
Pojawia się w:
Ginekologia Onkologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of videonystagmography head impulse test (VHIT) in the diagnostics of semicircular canal injuries in patients with vertigo
Autorzy:
Miłoński, Jarosław
Pietkiewicz, Piotr
Bielińska, Marzena
Kuśmierczyk, Krzysztof
Olszewski, Jurek
Powiązania:
https://bibliotekanauki.pl/articles/2178867.pdf
Data publikacji:
2014-08-06
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
videonystagmography head impulse test (VHIT)
diagnostics
semicircular canal
injuries
vertigo
Opis:
Objectives: The aim of the study was to assess the function of semicircular canal in videonystagmography head impulse test (VHIT) in the patients with vertigo and balance disorders. Material and Methods: The study was performed in 135 patients (86 women and 49 men) aged 22–79 years, who were divided into 2 groups: I (study group) – 73 patients with vertigo of peripheral, central or mixed origin, II (control group) – 62 patients without vertigo (healthy individuals). The function of canal was determined on the basis of GAIN and expressed as DG/RH×100% (where DG is deviation of gaze and RH is rotation of head). Results: In the study group the semicircular canal injuries were found in 37 (50.69%) patients, including 24 (32.87%) patients with 1 injury and 13 (17.8%) patients with 2 or more injuries in semicircular canal. The injured anterior semicircular canal was reported 13 times; the lateral – 9 times and the posterior – 31 times. Conclusions: In the study group, in the VHIT, injuries in semicircular canals were reported in peripheral vertigo, mixed vertigo with non-compensated and compensated function of the labyrinth in 50.68% cases, whereas in the caloric test dysfunction of the labyrinth was found in 58.49% cases.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 4; 583-590
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixed welding of the mobile construction platform in the automotive industry
Autorzy:
Węgrzyn, Tomasz
Szczucka-Lasota, Bożena
Piwnik, Jan
Jurek, Adam
Wilczyński, Krzysztof Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2203844.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
AHSS steel
mobile platforms
automotive
transport
micro-jet cooling
stal AHSS
platformy mobilne
motoryzacja
chłodzenie mikrostrumieniowe
Opis:
This paper examines the possibility to improve mixed weldability of pins to mobile platforms. There is an increasing demand for mixed joints made of hard-weldable steel used in civil engineering and the automotive industry. A good example of this is welding of movable platform elements such as a pin to arm joints. The pin is very often made of yield structural steel S690 QL (1.8928), while the arm of the movable platform is mainly made of DOCOL 1400M steel from the AHSS group (advanced high-strength steel). This kind of joint is not easy to manufacture due to the different chemical compositions and thicknesses of both grades of steel. The difference in the thickness of welded elements creates an additional difficulty. The main aim of this article is to determine the most appropriate welding parameters and select additional materials to obtain the correct joint with good mechanical properties, free from welding defects and incompatibilities. This article examines whether the application of micro-jet cooling technology during the welding process might help to overcome these issues. For the first time, micro-jet cooling was not used to weld these grades of steel. The welding parameters and the micro-jet cooling parameters were investigated.
Źródło:
Transport Problems; 2021, 16, 1; 29--38
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of mechanical properties of welds of DOCOL 1200M toward application in components of special vehicles
Autorzy:
Szczucka-Lasota, Bożena
Węgrzyn, Tomasz
Szymczak, Tadeusz
Jurek, Adam
Piwnik, Jan
Wilczyński, Krzysztof Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2098150.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
special vehicles
civil engineering
transport
welding
pojazdy specjalne
inżynieria lądowa
spawanie
Opis:
The paper focuses on modern martensitic steel (Docol 1200M) and its joint manufactured by means of welding process supported by micro-jet cooling for special vehicles’ structures. Docol 1200M is a type of material denoted as AHSS (A- advanced; H - high; S – strength; S - steel) with important material characteristics, which allows the potential to reduce the weight of the construction of transport means. The paper verifies if the use of micro-jet cooling after MAG welding process could help to maintain initial mechanical parameters of special vehicles’ components. The quality of the joining process was checked by nondestructive and destructive tests. Results from tensile tests have enabled capturing the stress-strain curve as well as mechanical parameters and comparison with data of the parent material. Fatigue properties of the weld are described in terms of the fatigue limit and fatigue diagram, presenting fatigue limit as a key mechanical parameter with respect to the application of the joint examined. Testing the fatigue strength of a new steel grade for special vehicles’ structures in the innovative MAG process at micro-jet cooling was treated as the main goal of the study.
Źródło:
Transport Problems; 2021, 16, 2; 33--43
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding supports of pins in mobile platforms
Spawanie sworzni podestów ruchomych
Autorzy:
Silva, Abilio
Szczucka-Lasota, Bożena
Węgrzyn, Tomasz
Jurek, Adam
Wilczyński, Krzysztof Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/115190.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spawanie
sworzeń
inżynieria lądowa
transport
podest ruchomy
stal DOCOL 1200M
welding
pin
civil engineering
mobile platform
DOCOL 1200M steel
Opis:
The demand for dissimilar joints of hard-welded steels used in civil engineering and transport is increasing. An example of this can be welding of pins of high-strength steel S690 QL (1.8928) with the arms of a movable platform made of DOCOL 1200M steel from the AHSS group. This joint is difficult to make properly, due to significant differences in the thickness of welded elements and different chemical composition of both steels. The diameter of pin is 40 mm. The thickness of the metal sheet used for the mobile platform arm is 2 mm. Joints of varying thickness and chemical composition may have cracks in the heat affected zone and in the weld. The purpose of the article is to determine the welding parameters and the selection of filler materials that will allow to obtain the correct joint without welding defects.
Wzrasta zapotrzebowanie na wykonywanie mieszanych złączy z trudnospawalnych stali stosowanych w inżynierii lądowej i w transporcie. Przykładem tego może być spawanie sworzni z konstrukcyjnej stali o podwyższonej wytrzymałości S690 QL (1.8928) z ramionami podestu ruchomego wykonanego ze stali DOCOL 1200M z grupy AHSS. Złącze to jest trudne do prawidłowego wykonania, ze względu na znaczne różnice grubości spawanych elementów i odmienny skład chemiczny oraz mechanizmy umocnienia obu stali. Średnica sworznia wynosi 40 mm. Grubość blachy stosowanej na ramię podestu jest znacznie mniejsza - 2 mm. W złączach o różnej grubości i odmiennym składzie chemicznym mogą występować pęknięcia w strefie wpływu ciepła i w spoinie. Celem artykułu jest ustalenie parametrów spawania i dobór materiałów dodatkowych, które pozwolą na uzyskanie prawidłowego złącza bez wad spawalniczych.
Źródło:
Welding Technology Review; 2020, 92, 4; 25-29
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative evaluation of the diagnostic value of the VHIT and Dix-Hallpike test in patients with balance system disorders in out-patient healthcare practice and expertise preparation
Autorzy:
Karawani, Kefah
Bielinska, Marzena
Nowosielska-Grygiel, Joanna
Pietkiewicz, Piotr
Kusmierczyk, Krzysztof
Kolary, Katarzyna
Olszewski, Jurek
Powiązania:
https://bibliotekanauki.pl/articles/1398278.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
VHIT Ulmer I
Dix-Hallpike test
vertigo
Opis:
Introduction: This study aimed to perform comparative analysis of the diagnostic value of the Video Head Impulse Testing (VHIT) Ulmer I and Dix-Hallpike Test in patients with balance system disorders in outpatient healthcare practice and medical jurisdiction. Material and methods: The study included 63 patients, aged 20–79, 28 women (20–72 years) and 35 men (23–79 years),
divided into two groups: group I (study group) – 33 patients with vertigo of mixed origin (on the basis of the Fitzgerald-Hallpike caloric test during the VNG), and group II (reference group) – 30 healthy subjects. After the ENT interview and physical examination, exclusion of pathological lesions in the external acoustic meatus and middle ear, each patient underwent the Fitzgerald-Hallpike caloric test in VNG as well as the VHIT and Dix-Hallpike test, with the evaluation of eyeball reaction during head rotation. Results: In the group of patients with mixed origin vertigo (group I), the Fitzgerald-Hallpike caloric test showed unilateral labyrinth disturbances in 90.9% of the patients (mean 41.8%) and relative directional preponderance of the mean value of 19.0%, whereas in 9.1% of the patients, the detected values of labyrinth excitability were normal. Benign paroxysmal positional vertigo was diagnosed in 9.1% of all the examined vertigo cases. This diagnosis was based on the positive response to the Dix-Hallpike maneuver and indicative of damage to the posterior semicircular canal in VHIT (without signs of deficiency in VNG). Conclusion: VHIT and the Dix-Hallpike test enable quick and precise detection of benign paroxysmal positional vertigo in outpatient healthcare practice and medical jurisdiction.
Źródło:
Polish Journal of Otolaryngology; 2018, 72, 6; 37-43
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
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