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    Wyświetlanie 1-9 z 9
    Tytuł:
    Fatigue alters the biomechanical contribution of lower extremity joints during a stretch-shortening cycle task
    Autorzy:
    Sun, Xiaole
    Xia, Rui
    Zhang, Ximi
    Zhen, Luo
    Fu, Weijie
    Powiązania:
    https://bibliotekanauki.pl/articles/949743.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    skoki
    zmęczenie
    sztywność
    stretch-shortening cycle
    drop jump
    fatigue
    stiffness
    joint work
    Opis:
    This study aimed to explore the effect of fatigue on the biomechanical contribution of the lower extremity joints during a typical stretch-shortening cycle (SSC) task. Methods: 15 male athletes completed drop jump (DJ) under pre- and post-fatigue. Vicon motion capture system and 3D Kistler force plates were used to collect kinematics and ground reaction force data simultaneously. Results: Under fatigue condition, 1) the DJ height decreased; the touchdown angle of knee and ankle reduced and the range of motion increased; 2) the maximum push-off moment and power of knee was reduced; 3) the stiffness of knee, ankle, and legs was reduced; 4) the energy generation and the net energy of the ankle decreased; 5) the energy contribution of knee decreased during the eccentric phase. Conclusions: Fatigue altered biomechanical contribution of the lower extremity joints by changing the movement pattern during DJ. The control ability of the knee and ankle were decreased. Eventually, the jump performance was reduced. In addition, the decrease of stiffness as well as the energy contribution of these joints can be used as sensitive indices to evaluate the performance of DJ after fatigue.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2019, 21, 2; 11-19
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kilka refleksji nad pojęciem kooperacji
    Some Reflections around the Notion of Cooperation
    Autorzy:
    Nowak, Dariusz
    Gołembski, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/904558.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    cooperation
    joint production
    collaboration
    team work
    contribution
    Opis:
    Presently cooperation plays a very important role. It should be stressed, that both in the economic practice and the general literature there is a lack of homogonous conception and even definition, which comprehensively describes the phenomenon of cooperation. The paper presents different opinions and a point of view characterizing the cooperation issue.
    Źródło:
    Acta Universitatis Lodziensis. Folia Oeconomica; 2013, 278
    0208-6018
    2353-7663
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Oeconomica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hip joint arthroscopy in professionally active patients with osteoarthritis
    Autorzy:
    Drobniewski, Marek
    Synder, Marek
    Skrzypek, Michał
    Pstrągowski, Kajetan
    Polguj, Michał
    Borowski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2161984.pdf
    Data publikacji:
    2019-02-27
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    degenerative disease
    return to work
    arthroscopy
    hip joint
    WOMAC
    Harris Hip Score
    Opis:
    Objectives The primary endpoints of the study were to assess the effectiveness of hip joint arthroscopy in the treatment of femoroacetabular impingement (FAI) in patients with joint gap stenosis and to determine if and how quickly patients were able to return to work and physical activity. Material and Methods The prospective study of patients undergoing hip joint arthroscopy due to pain in FAI has been conducted. They were divided into 2 groups depending on the degree of the radiological examination. The criterion was the width of the joint gap. The study group involved 47 patients with hip joint gap of 2–3 mm, identified by means of the standardized X-ray examination. The control group consisted of 45 patients with hip joint gap > 3 mm. The post-operative follow-up period of the patients lasted at least 2 years. In addition, the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC) questionnaire together with Harris Hip Score (HHS) were applied. The patients were also evaluated for the post-operative time period enabling return to work. Results All the patients after hip joint arthroscopy returned to normal physical activity within 12 weeks after operation, enabling their return to work. However, it should be noted that during the post-operative follow-up, pain sensations either recurred or did not regress in 37 patients in the study group and 12 patients in the control group after treatment. The nearly equal results of the WOMAC questionnaire and HHS before operation significantly vary between both groups in the last follow up. In the study group they did not change expressively. Conclusions Despite the little invasiveness, hip joint arthroscopy in patients with joint gap stenosis brings about the far from satisfactory results. This procedure is not worth considering. Despite unsatisfactory pain relief, patients decided to returned to work, due to their occupational position and for fear of losing the job due to long absenteeism. Int J Occup Med Environ Health. 2019;32(1):115–20
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2019, 32, 1; 115-120
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cooperation agreement as legal instrument stimulating hydrocarbon exploration and production in Poland
    Autorzy:
    Stachera, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/299293.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    geological and mining law
    Polska
    concession
    cooperation agreement
    joint exploration
    production work
    hydrocarbons
    Opis:
    The oil and gas industry in Poland is burdened with relatively high investment risk. The main reason for this is the complex geology and relatively medium-sized resources that do not guarantee a return on an investment. The above factors have led to the necessity of sharing the risk to minimize the negative financial effect of the investment, which has resulted in the more and more frequent cooperation of several entities towards the realization of a specific project. The “shale revolution” has significantly contributed to the evolution of legal regulations in this area; i.e., the implementation of the act of June 9, 2011 – Geological and Mining Law (Journal of Laws of 2014, Item 1133). It introduces the concept of “cooperation agreement” for the purpose of the joint use of rights and execution of concession obligations in respect to the exploration and prospecting of hydrocarbon deposits as well as the extraction of hydrocarbons from deposits. In the article, the author intends to show that, contrary to the generally prevailing opinion, the new act of June 9, 2011 – Geological and Mining Law (Journal of Laws of 2011, No. 163, Item 981) was not only aimed at increasing state control over the activity in the field of exploration and production, but on the contrary – it was aimed at liberalizing the market and stimulating domestic and foreign entities to engage in exploration and production activities in Poland. The article presents a new and original approach in light of the interpretation of legal regulations based on which hydrocarbon exploration and production activities are carried out in Poland. The author uses the formal-dogmatic analysis method (otherwise known as the logical-linguistic analysis method) to clarify the archival, current, and abandoned legal acts pertaining to the macroeconomic environment. This method is well-known in law research.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 2; 391-405
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Idea of Community Property: Genesis and Development in Soviet Family Law
    Autorzy:
    Prostibożenko, Oleg
    Powiązania:
    https://bibliotekanauki.pl/articles/927122.pdf
    Data publikacji:
    2018
    Wydawca:
    Wydawnictwo Uniwersytetu Śląskiego
    Tematy:
    Soviet family law
    material property systems
    community property
    spouse
    concept of work
    joint ownership
    Opis:
    This article is devoted to research into the origins of the idea of community property in Soviet law and its development in the Soviet study of family law, legislation, and judicature. The paper deals with regulations concerning property relations of spouses in the Soviet empire. The author examines conditions and circumstances of the adoption of the first Soviet codes of family law and indicates their characteristics. He also analyzes the impact of spouses’ work on Soviet marital property system.
    Źródło:
    Z Dziejów Prawa; 2018, 11, 2; 219-239
    1898-6986
    2353-9879
    Pojawia się w:
    Z Dziejów Prawa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Muzyka generowana przez programy komputerowe (computer-generated music) jako przedmiot prawnoautorskiej ochrony w doktrynie i prawie polskim oraz doktrynie i prawie krajów anglosaskich
    Computer-generated music as a subject of copyright protection in Polish doctrine and law and Anglo-Saxon doctrine and law
    Autorzy:
    Ciepłuch, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1596463.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    joint authorship.
    work
    authorship
    author
    computer-assisted works
    computer-generated works
    współtwórczość
    utwór
    autor
    Opis:
    W artykule omówiony zostaje problem objęcia ochroną prawnoautorską utworów generowanych (ang. computer-generated works) bądź współtworzonych komputerowo (ang. computer-assisted works). Programy komputerowe są obecnie jednym z głównych narzędzi współczesnych kompozytorów, co więcej, znaczna część współczesnej muzyki poważnej i rozrywkowej tworzona jest lub współtworzona przez program komputerowy. W świetle ustawy o prawie autorskim i prawach pokrewnych z dnia 4 lutego 1994 r. (Dz.U. 1994 nr 24 poz. 83) ochroną prawnoautorską obejmowane są utwory będące efektem pracy twórczej człowieka, co prowadzi do konstatacji, że utwory generowane przez programy komputerowe z takiej ochrony nie korzystają. Rodzi się więc pytanie, czy przypadkiem otaczająca nas muzyka nie jest nieobjęta ochroną prawnoautorską i zasila domenę publiczną. Z drugiej strony, wiele krajów anglosaskich przyznaje prawa autorskie do utworu generowanego komputerowo osobom obsługującym taki program. W artykule zajmę się przeglądem rozwiązań prawnych dotyczących praw autorskich do utworów generowanych komputerowo, przedstawię koncepcje mające na celu odnalezienie odpowiedzi, kto powinien być podmiotem praw autorskich takich utworów, a na końcu podejmę próbę dowiedzenia, że w sytuacji obowiązywania obecnej ustawy o prawie autorskim i prawach pokrewnych objęcie ochroną utworów generowanych komputerowo jest możliwe na podstawie analogii do praw autorskich przyznawanych autorom niektórych utworów fotograficznych.
    The article discusses the issue of granting copyright to computer-generated and computer-assisted works. Even though this subject has been widely examined in Western countries in the 1990s, for some reason it was not widely covered in Poland. Meanwhile, computer programmes have become main composing tools used by musicians. The music we hear on the radio is more often than not an effect of computer, not human, work. Polish Copyright law grants a right to authorship only in cases when a work remains an effect of human activity. This gives rise to the question whether the music that surrounds us is copyright free and belongs to the public domain. On the other hand, in some Anglo-Saxon countries, copyright related to computer-generated works is granted to the person by whom the arrangements necessary for the creation of the work are undertaken. The following article contains an overview of theoretical concepts underlying the authorship of computer-generated works, discusses various legal solutions to the problem exercised abroad and provides evidence in support of the thesis that in spite of the harsh and rigorous provisions contained in Polish Copyright law, it is possible to grant copyright protection to computer-generated works.
    Źródło:
    Acta Iuris Stetinensis; 2016, 15, 3; 37-57
    2083-4373
    2545-3181
    Pojawia się w:
    Acta Iuris Stetinensis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment outcomes of peri-articular steroid injection for patients with work-related sacroiliac joint pain and lumbar para-spinal muscle strain
    Autorzy:
    Medani, Khalid
    Bvute, Kushinga
    Narayan, Natasha
    Reis, Cesar
    Sharip, Akbar
    Powiązania:
    https://bibliotekanauki.pl/articles/2086116.pdf
    Data publikacji:
    2021-01-07
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    sacroiliac joint pain
    peri-articular steroid injection
    trigger point injection
    lumbar strain
    para-spinal muscle strain
    work-related low back pain
    Opis:
    ObjectivesEvaluating treatment outcomes of local corticosteroid injections for work-related lower back pain (LBP) as the current evidence for the American College of Occupational and Environmental Medicine guidelines is considered insufficient to recommend this practice.Material and MethodsThe authors conducted a retrospective study involving the patients who were treated with peri-articular and lower lumbar corticosteroid injections for work-related LBP at their occupational medicine clinic.ResultsSixty-four patients met the inclusion criteria. The average pain level was reduced from M±SD 5.1±2.0 to M±SD 3.1±2.3 after the corticosteroid injection (p < 0.0001). Thirty-five patients (55%) were discharged to regular duty; 23 (36%) were transferred to orthopedics due to persistent pain; and 6 (9%) were lost to follow-up.ConclusionsCorticosteroid injections for work-related LBP are effective in reducing pain and enhancing discharge to regular duty. Nonetheless, larger prospective trials are needed to validate these findings.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2021, 34, 1; 111-120
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czynniki wpływające na utrzymanie aktywności zawodowej w okresie 2–3 lat po zabiegu całkowitej endoprotezoplastyki stawu biodrowego
    Factors affecting the maintenance of occupational activity over a 2–3-year period after total hip replacement
    Autorzy:
    Pop, Teresa
    Bejer, Agnieszka
    Baran, Joanna
    Szymczyk, Daniel
    Powiązania:
    https://bibliotekanauki.pl/articles/2162659.pdf
    Data publikacji:
    2018-03-09
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    zatrudnienie
    endoprotezoplastyka stawu biodrowego
    aktywność zawodowa
    powrót do pracy
    staw biodrowy
    skala Harrisa
    employment
    hip replacement
    occupational activity
    return to work
    hip joint
    Harris Hip Score
    Opis:
    Wstęp Celem pracy była ocena statusu zawodowego osób po całkowitej endoprotezoplastyce stawu biodrowego w okresie 2–3 lat od zabiegu oraz analiza wpływu takich czynników, jak wiek, płeć, BMI (body mass index – wskaźnik masy ciała), sprawność funkcjonalna i samoocena stanu zdrowia na utrzymanie aktywności zawodowej. Materiał i metody W badaniu wzięło udział 107 osób, w tym 56 kobiet i 51 mężczyzn. Średni wiek badanych wynosił 55,1 roku. Zastosowano wystandaryzowany autorski kwestionariusz, który zawierał pytania dotyczące danych osobowych i klinicznych, aktywności zawodowej oraz samooceny stanu zdrowia. Dokonano pomiaru masy ciała i wzrostu i wyliczono wskaźnik BMI. Wykorzystano także 100-punktową skalę Harrisa (Harris Hip Score) do oceny sprawności funkcjonalnej badanych. Wyniki Po zabiegu endoprotezoplastyki stawu biodrowego ok. 60% pacjentów nie było aktywnych zawodowo – świadczenia rentowe pobierały 44 (41,1%) osoby, świadczenia emerytalne – 18 (16,8%) osób, a zasiłek dla bezrobotnych – 2 (1,9%) osoby. Nikt z badanych niepracujących przed zabiegiem (z powodu renty) nie podjął pracy po zabiegu. Płeć badanych nie miała istotnego statystycznie wpływu na podjęcie aktywności zawodowej po zabiegu, podobnie jak rodzaj wykonywanej pracy i BMI. Stwierdzono natomiast statystycznie istotne zależności między podejmowaniem aktywności zawodowej po zabiegu a poziomem sprawności funkcjonalnej ocenianej skalą Harrisa (p = 0,0350) i samooceną stanu zdrowia (p = 0,0057). Wnioski Ponad połowa badanych nie podjęła pracy po całkowitej endoprotezoplastyce biodra w okresie 2–3 lat od zabiegu. W grupie osób pracujących umysłowo przed zabiegiem do pracy powróciło stosunkowo najwięcej osób spośród wszystkich badanych. Istotny wpływ na powrót do pracy miały wiek, sprawność funkcjonalna i samoocena stanu zdrowia. Med. Pr. 2018;69(2):191–198
    Background The purpose of this paper was to assess the occupational activity in patients after hip replacement over a 2–3-year post operational period and to analyze the effect of selected factors (age, gender, body mass index (BMI), functional state and self-assessed health status) on this activity. Material and Methods In the research 107 people (56 women and 51 men) participated. The average age of the subject’s was 55.1 years. A standardized author’s survey questionnaire, including questions about personal and clinical data, occupational activity and self-assessment of health status, was applied. The body mass and height were measured and the BMI index was calculated. The 100 points Harris Hip Score (HHS) was used to assess the functional state in the respondents. Results After the operation about 60% of the patients were not occupationally active; 44 (41.1%) respondents received the state health benefit, 18 (16.8%) respondents were eligible for pension benefit, and 2 (1.9%) respondents were unemployed with benefit. No one unemployed before the operation undertook work afterwards. Neither gender nor the character of the job or BMI exerted statistically significant effect on the occupational activity after the operation. Significant differences were noted in undertaking the occupational activity after the operation in patients with different level of functional efficiency assessed with the use of HHS (p = 0.0350) and different level of self-assessed health statuse (p = 0.0057). Conclusions More than half of the respondents have not returned to work after total hip replacement, while people doing intellectual work most frequently returned to occupation after surgery. Age, functional efficiency, and self-assessed health status of the patient had a significant influence on their return to work. Med Pr 2018;69(2):191–198
    Źródło:
    Medycyna Pracy; 2018, 69, 2; 191-198
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental studies of static and dynamic steel arch support load capacity and sliding joint temperature parameters during yielding
    Autorzy:
    Pytlik, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1853806.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nośność statyczna
    wyrobisko
    podpora stalowa
    yielding steel arch support
    support shackle torque
    static and dynamic load capacity
    support work
    arch acceleration in sliding joints
    joint sparking and heating temperature during yielding
    Opis:
    Difficult geological and mining conditions as well as great stresses in the rock mass result in significant deformations of the rocks that surround the workings and also lead to the occurrence of tremors and rock bursts. Yielding steel arch support has been utilised in the face of hard coal extraction under difficult conditions for many years, both in Poland and abroad. A significant improvement in maintaining gallery working stability is achieved by increasing the yielding support load capacity and work through bolting; however, the use of rock bolts is often limited due to factors such as weak roof rock, significant rock mass fracturing, water accumulation, etc. This is why research and design efforts continue in order to increase yielding steel arch support resistance to both static and dynamic loads. Currently, the most commonly employed type of yielding steel arch support is a support system with frames constructed from overlapping steel arches coupled by shackles. The yield of the steel frame is accomplished by means of sliding joints constructed from sections of various profiles (e.g. V, TH or U-type), which slip after the friction force is exceeded; this force is primarily dependent on the type of shackles and the torque of the shackle screw nuts. This article presents the static bench testing results of ŁP10/V36/4/A, ŁP10/V32/4/A and ŁP10/V29/4/A yielding steel arch support systems formed from S480W and S560W steel with increased mechanical properties. The tests were conducted using 2 and 3 shackles in the joint, which made it possible to compare the load capacities, work values and characteristics of various types of support. The following shackle screw torques were used for the tests: Md = 500 Nm – for shackles utilised in the support constructed from V32 and V36 sections. Md = 400 Nm – for shackles utilised in the support constructed from V29 sections. The shackle screw torques used during the tests were greater compared to the currently utilised standard shackle screw torques within the range of Md = 350-450 Nm. Dynamic testing of the sliding joints constructed from V32 section with 2 and 3 shackles was also performed. The SD32/36W shackles utilised during the tests were produced in the reinforced versions and manufactured using S480W steel. Since comparative testing of a rock bolt-reinforced steel arch support system revealed that the bolts would undergo failure at the point of the support yield, a decision was made to investigate the character of the dynamics of this phenomenon. Consequently, this article also presents unique measurement results for top section acceleration values registered in the joints during the conduction of support tests at fullscale.Filming the yield in the joint using high-speed video and thermal cameras made it possible to register the dynamic characteristics of the joint heating process at the arch contact point as well as the mechanical sparks that accompanied it. Considering that these phenomena have thus far been poorly understood, recognising their significance is of great importance from the perspective of occupational safety under the conditions of an explosive atmosphere, especially in the light of the requirements of the new standard EN ISO 80079-36:2016, harmonised with the ATEX directive.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 3; 469-491
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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