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Wyświetlanie 1-10 z 137
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
Pokaż więcej
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:
Understanding the origin and impact of relativistic cosmic particles with very-high-energy gamma-rays
Autorzy:
Goldoni, P.
Ong, R. A.
Inoue, S.
Lenain, J.-P.
Morlino, G.
Torres, D. F.
Mukherjee, R.
Bandiera, R.
Humensky, T. B.
Ostrowski, Michał
Pe'er, A.
Bird, R.
Vandenbroucke, J.
Kaaret, P.
Santander, M.
Ohm, S.
Amato, E.
Hinton, J.
Tothill, N. F. H.
Tibaldo, L.
Bulgarelli, A.
Williams, D.
Dwarkadas, V. V.
Holder, Jamie
Hnatyk, B.
Vorobiov, S.
Giglietto, N.
Marcowith, A.
Sergijenko, O.
Opis:
This white paper briefly summarizes the importance of the study of relativistic cosmic rays, both as a constituent of our Universe, and through their impact on stellar and galactic evolution. The focus is on what can be learned over the coming decade through ground-based gamma-ray observations over the 20 GeV to 300 TeV range.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Radio imaging of the very-high-energy $\gamma$-ray emission region in the central engine of a radio galaxy
Autorzy:
Errando, M.
Jahn, C.
Schwemmer, S.
Dalton, M.
Ly, C.
Chadwick, P. M.
Dyrda, M.
De Naurois, M.
Pandel, D.
Roache, E.
Gallant, Y. A.
Gyuk, G.
Keogh, D.
Lindfors, E.
Kaaret, P.
Gall, D.
Bose, D.
Hauser, M.
Hadasch, D.
Wood, M.
Sanchez-Conde, M.
Venter, C.
Meucci, M.
Barres de Almeida, U.
Biland, A.
Cheesebrough, A.
Lohse, T.
Boutelier, T.
Zech, A.
Stamerra, A.
Bosch-Ramon, V.
Paredes, J. M.
Finley, J. P.
Lombardi, S.
Nieto, D.
Bradbury, S. M.
Degrange, B.
Famier, C.
Tam, P. H.
Deil, C.
Galante, N.
Santangelo, A.
Puchades, N.
Spanier, F.
Hermann, G.
Ohm, S.
De Los Reyes, R.
Schlickeiser, R.
Guenette, R.
Hanna, D.
Domainko, W.
Nolan, S. J.
López, R. J. G.
López, M.
Font, L.
Pedaletti, G.
Reichardt, I.
Antonelli, L. A.
Giebels, B.
Kosack, K.
Wissel, S.
Smith, A. W.
La Barbera, A.
Wagner, S. J.
Tavecchio, F.
Antoranz, P.
Boisson, C.
Tavemet, J.-P.
Holder, J.
Glück, B.
Scalzotto, V.
Lorenz, E.
Barrio, J. A.
Contreras, J. L.
Nekrassov, D.
LeBohec, S.
Rosier-Lees, S.
Naumann-Godo, M.
Nilsson, K.
McCann, A.
Heinzelmann, G.
Petrucci, P.-O.
Anton, G.
Bautista, M.
Stegmann, C.
Rowell, G.
Tridon, D. B.
Humensky, T. B.
Nicholas, B.
Fumiss, A.
Gerbig, D.
Höhne-Mönch, D.
Krawczynski, H.
Dazzi, F.
Raubenheimer, B. C.
Arlen, T.
De Sabata, F.
Paoletti, R.
Beilicke, M.
Konopelko, A.
Torres, D. F.
Bugaev, V.
Saggion, A.
Elsaesser, D.
Sitarek, J.
Robert, A.
Tescaro, D.
Majumdar, P.
Rügamer, S.
Hui, C. M.
Herrero, A.
Moldón, J.
Gaug, M.
Kaufmann, S.
Braun, I.
Ward, J. E.
Costado, M. T.
Steenkamp, R.
Volpe, F.
Chow, Y. C.
De Lotto, B.
Camara, M.
Persic, M.
Bühler, R.
Firpo, R.
Schock, F. M.
Venter, L.
Hayashida, M.
Henri, G.
Turini, N.
Kildea, J.
Peruzzo, L.
Carmona, E.
Toner, J. A.
Schroedter, M.
Rob, L.
Maneva, G.
Mariotti, M.
Byrum, K.
Schwanke, U.
Zanin, R.
Brun, P.
Fiasson, A.
Longo, F.
Medina, M. C.
Dickinson, H. J.
Fernández, E.
Becherini, Y.
Bretz, T.
Goret, P.
Krennrich, F.
Davies, F.
Commichau, S.
Kneiske, T.
Büsching, I.
Pauss, F.
Gérard, L.
Ciupik, L.
Punch, M.
Rulten, C. B.
Behera, B.
Perez-Torres, M. A.
Mankuzhiyil, N.
Panter, M.
Stawarz, Łukasz
Zandanel, F.
De Maria, M.
Ward, M.
Hauser, D.
Hofmann, W.
Karlsson, N.
Reyes, L. C.
Olive, J.-F.
Schröder, R.
Mazin, D.
Sahakian, V.
Szostek, Anna
Oya, I.
Spangler, D.
Junor, W.
Hildebrand, D.
Dorner, D.
Shalchi, A.
Lang, M. J.
Curtef, V.
Zabalza, V.
Martinez, M.
Sol, H.
Laille, A.
Dubus, G.
Raue, M.
Garczarczyk, M.
Feinstein, F.
Britvitch, I.
Ninkovic, J.
Pelletier, G.
Takalo, L.
Scapin, V.
Katz, U.
Kranich, D.
Otte, A. N.
Becker, J. K.
Sidro, N.
Ripken, J.
Fortin, P.
Dickherber, R.
Heinz, S.
Hose, J.
Perkins, J. S.
Fontaine, G.
Sembroski, G. H.
Nedbal, D.
Rhode, W.
Lenain, J.-P.
Moulin, E.
Moriarty, P.
Paz Arribas, M.
Stark, L. S.
Miranda, J. M.
Emmanoutopoulos, D.
Millis, J.
Kerschhaggl, M.
Chaves, R. C. G.
Weekes, T. C.
Cesarini, A.
Grube, J.
Covino, S.
Ong, R. A.
Bock, R. K.
Temnikov, P.
Akhperjanian, A. G.
Bazer-Bachi, A. R.
Moderski, R.
Mannheim, K.
Moles, M.
Cortina, J.
Pohl, M.
Moraleja, A.
Vasileiadis, G.
Prandini, E.
Reynolds, P. T.
Charbonnier, A.
Jung, I.
Bochow, A.
Ruppel, J.
Pasanen, M.
Wagner, R. M.
Goebel, F.
Butt, Y.
Coignet, G.
Martin, J. M.
Pegna, R. G.
McComb, T. J. L.
Maier, G.
Pita, S.
Stinzing, F.
Wakely, S. P.
Pûhlhofer, G.
Schwarzburg, S.
Skilton, J. L.
Djannati-Ataï, A.
Niemiec, J.
Bonnoli, G.
Acciari, V. A.
Fonseca, M. V.
Balestra, S.
Füßling, M.
Brun, F.
Clapson, A. C.
Marandon, V.
Petry, D.
Kbmin, Nu.
Quinn, J.
Cannon, A.
Kieda, D.
Glicenstein, J. F.
Daniel, M. K.
Fortson, L.
Ostrowski, Michał
Borrel, V.
Schweizer, T.
Quirrenbach, A.
Shayduk, M.
Holleran, M.
Fegan, S. J.
Backes, M.
De Angelis, A.
Ragan, K.
Bemlöhr, K.
Sierpowska-Bartosik, A.
Ferenc, D.
Martineau-Huynh, O.
Ribo, M.
Satalecka, K.
Salto, T. Y.
Teshima, M.
De Oña Wilhelmi, E.
Bednarek, W.
Orford, K. J.
Renaud, M.
Vincent, S.
Vincent, P.
Davids, I. D.
Cui, W.
Bulik, T.
Weinstein, A.
Hsu, C. C.
Marcowith, A.
Dyks, J.
Bernardini, E.
Sikora, M.
De Cea Del Pozo, E.
Egberts, K.
Dora, M.
Espigat, P.
Theiling, M.
Gabici, S.
Prada, F.
Khangulyan, D.
Waiker, R. C.
Buckley, J. H.
Salvati, M.
Lamanna, G.
Katarzyriski, K.
Miyamoto, H.
Vankov, H.
Jogler, T.
Tibolla, O.
Maurin, D.
Göhring, D.
Rico, J.
Khélifi, B.
Cogan, P.
Pascoli, D.
Van Eldik, C.
Zapatero, J.
Bastieri, D.
Williams, D. A.
Swordy, S. P.
Vialle, J. P.
Shore, S. N.
Hardee, P. E.
Brucker, J.
Dominguez, A.
Mendez, C. D.
Sobczynska, D.
Rayner, S. M.
Imran, A.
Celik, O.
Horns, D.
Benbow, W.
Klužniak, W.
McCutcheon, M.
Mirzoyan, R.
Rudak, B.
Volk, H. J.
Chounet, L.-M.
Gillanders, G. H.
Superina, G.
Hoffmann, A.
Drury, L. O.
Rose, H. J.
Becerra Gonzalez, J.
Vivier, M.
Aharonian, F.
Sillanpää, A.
Terrier, R.
Bolmont, J.
Maraschi, L.
Kendziorra, E.
Berger, K.
Rissi, M.
Baixeras, C.
Hinton, J. A.
Leonardo, E.
De Jager, O. C.
Dubois, F.
Zdziarski, A. A.
Tluczykont, M.
Förster, A.
Horan, D.
Varlotta, A.
Aliu, E.
Rieger, F.
Jacholkowska, A.
Hoppe, S.
Bordas, P.
Anderhub, H.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The LOFAR LBA Sky Survey : II. First data release
Autorzy:
Offringa, A.
Mingo, B.
Norden, M. J.
Bonafede, A.
Asabere, B.
Miley, G.
Zarka, P.
Dijkema, T. J.
Callingham, J. R.
Iacobelli, M.
Schwarz, D. J.
Brüggen, M.
Oei, M. S. S. L.
Chyży, Krzysztof
Brunetti, G.
Prandoni, I.
Röttgering, H. J. A.
Cuciti, V.
van Weeren, R. J.
Williams, W. L.
Bomans, D. J.
de Gasperin, F.
Kadler, M.
Hardcastle, M. J.
Shimwell, T.
Cassano, R.
Edler, H. W.
Emig, K. L.
Botteon, A.
Tasse, C.
Opis:
Context. The Low Frequency Array (LOFAR) is the only existing radio interferometer able to observe at ultra-low frequencies (<100 MHz) with high resolution (<15") and high sensitivity (<1 mJy beam$^{-1}$). To exploit these capabilities, the LOFAR Surveys Key Science Project is using the LOFAR Low Band Antenna (LBA) to carry out a sensitive wide-area survey at 41–66 MHz named the LOFAR LBA Sky Survey (LoLSS). Aims. LoLSS is covering the whole northern sky above declination 24° with a resolution of 15" and a sensitivity of 1–2 mJy beam$^{-1}$ (1σ) depending on declination, field properties, and observing conditions. Here we present the first data release, including a discussion of the calibration strategy and the properties of the released images and catalogues. Methods. A fully automated pipeline was used to reduce the 95 fields included in this data release. The data reduction procedures developed for this project have a general application and are currently being used to process almost all LOFAR LBA interferometric observations. Compared to the preliminary release, direction-dependent errors have been derived and corrected for during the calibration process. This results in a typical sensitivity of 1.55 mJy beam$^{-1}$, which is four times better than for the preliminary release, at the target resolution of 15". Results. The first data release of the LOFAR LBA Sky Survey covers 650 deg$^{2}$ in the HETDEX spring field. The resultant data products released to the community include mosaic images (I and V Stokes) of the region, and a catalogue of 42 463 detected sources and related Gaussian components used to describe the sources' morphologies. Separate catalogues for the six in-band frequencies of 44, 48, 52, 56, 60, and 64 MHz are also released. Conclusions. The first data release of LoLSS shows that, despite the influences of the ionosphere and radio frequency interference, LOFAR can conduct large-scale surveys in the frequency window 42-66 MHz with unprecedentedly high sensitivity and resolution. The data can be used to derive unique information on the low-frequency spectral properties of many thousands of sources with a wide range of applications in extragalactic and galactic astronomy.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 137

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