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Tytuł:
A method for determining optimum distance between traps on line transects
Autorzy:
Williams, D. F.
Braun Hill, S. E.
Powiązania:
Acta Theriologica
Opis:
Line transects are often the choice of trap layout for studies of species composition and relative abundance within communities of small mammals. We presented a method for determining the optimum distance between traps on lines that will yield a uniform sampling area for each traps and thus maximize catch per effort. The method relies on finding the minimum intertrap distance at which captures are equal in both inner and end traps of short lines. We tested the method in two conifer forest communities of the Sierra Nevada of California.
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
ICT USE IMPLICATIONS FOR EXERCISE PARTICIPATION AND HEALTH IN THE NIGERIAN UNIVERSITY COMMUNITY
Autorzy:
Dominic, Olufunmilola L.
Seidina, Iliasu Y.
Williams, D. F.
Oyerinde, O. O.
Olaitan, L.
Tematy:
ergonomic, exercise, health ICT use, physical activity, sedentariness
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Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Powiązania:
https://bibliotekanauki.pl/articles/449192.pdf  Link otwiera się w nowym oknie
Opis:
Background: ICT use encourages deviation from a physically active lifestyle and might surreptitiously become a contemporary contributor to chronic diseases. The study was conducted to examine the extent of ICT use and its implications for exercise participation and health in the Nigerian University Community. Methods: A descriptive survey research design involving permanent members of the University of Ilorin, Nigeria was used. A multistage sampling technique was used to select 767 staff and students with an age range of 15–60 years. The University of Ilorin ethical review committee granted clearance (UERC/ASN/2016/588). The respondents were informed and all signed the informed consent form. A validated questionnaire, “Information and Communication Technology Use and Sedentariness Questionnaire (ICTUSQ)” with reliability (r=.89), was used for data collection. Statistical analyses conducted were frequency, percentage and One-way ANOVA; p≤0.05. Result: The most common types of ICT activities among the Nigerian University Community were: mobile phones calls/texting 91.0% (n=698), online-chats 90.9% (n=697), computer use 69.9% (n=536) and viewing TV/DVD 64.5% (n=495). Due to ICT use, respondents were continuously sedentary for several hours daily. Only 34.8% (n=267) of them participated in the recommended amount of exercise, the majority 81.0% (n=621) reported that they were too busy to exercise. ICTinduced health problems included shoulder pain 60.9% (n=467), thumb pain 68.6% (n=526), fatigue 33.0% (n=253), phone addiction 84.3% (n=646) and anxiety/depression 76.1% (n=544). Irrespective of age, factors that largely determined the extent of ICT use were gender, n=767, F(9, 757)=407.73, p≤0.005; occupation, n=767, F(9, 757)=163.79, p≤0.002; and type of job, n=767, F (9, 757)=639.45, p≤0.003. Conclusion: Excessive ICT use leads to sedentariness and a reduction in the desire to exercise. The accumulated effect might accelerate the risk of cardiometabolic, cardiovascular, physiological and mental disorders. Regular physical activity breaks of at least 5 minutes each hour of continuous ICT use, and the introduction of physical education and sport programmes to inculcate sustainable physical activity culture in the university community is recommended.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MTX-1 – A Potential Replacement for Tetrazene in Primers
Autorzy:
Fronabarger, J. W.
Williams, M. D.
Stern, A. G.
Parrish, D. A.
Tematy:
MTX-1
tetrazene
sensitizer
primer
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Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:
https://bibliotekanauki.pl/articles/357958.pdf  Link otwiera się w nowym oknie
Opis:
Tetrazene (1-amino-1(1H-tetrazol-5-yl)-azo-guanidine hydrate) is widely used in ordnance systems as a sensitizer of primer mixes for use in both percussion and stab applications. It has low thermal and hydrolytic stability compared with other components of primer mixes and there currently exists the need for a replacement with enhanced stability characteristics. MTX-1 (1-[(2E)- 3-(1H-tetrazol-5-yl)triaz-2-en-1-ylidene]methanediamine) meets these criteria and shows great promise as a tetrazene replacement. Preliminary testing of this material has confirmed that MTX-1 has safety and performance properties which are similar to tetrazene and has chemical characteristics, including thermal and hydrolytic stability, which exceed those of tetrazene. MTX-1 has been successfully evaluated against tetrazene in a variety of chemical/output tests, including comparative testing in the PVU-12 primer.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 175

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