1,876 research outputs found
A Symposium on Confronting Global Terrorism and American Neo-Conservatism: The Framework of a Liberal Grand Strategy. By Tom Farer. Oxford, UK: Oxford University Press, 2008.
A review of:
Confronting Global Terrorism and American Neo-Conservatism: The Framework of a Liberal Grand Strategy. By Tom Farer. Oxford, UK: Oxford University Press, 2008
Quotas for Men: Reframing Gender Quotas as a Means of Improving Representation for All
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Distribution and Community Characteristics of Staging Shorebirds on the Northern Coast of Alaska
Avian studies conducted in the 1970s on Alaskaâs Arctic Coastal Plain (ACP) indicated that coastal littoral habitats are important to Arctic-breeding shorebirds for staging prior to fall migration. However, relatively little recent, broad-scale, or quantitative information exists on shorebird use of staging areas in this region. To locate possible shorebird concentration areas in the littoral zone of the ACP, we conducted aerial surveys from the southwest end of Kasegaluk Lagoon on the Chukchi Sea to Demarcation Point on the Beaufort Sea during the summers of 2005â07. These surveys identified persistent within- and between-year concentrations of staging shorebirds at Peard Bay, Point Barrow/Elson Lagoon, Cape Simpson, and Smith Bay to Cape Halkett. Among river deltas in the Beaufort Sea, the Sagavanirktok and Kongakut deltas had large concentrations of staging shorebirds. We also collected data on shorebird community characteristics, staging phenology, and habitat use in 2005 and 2006 by conducting land-based surveys at six camps: Kasegaluk Lagoon, Peard Bay, Point Barrow/Elson Lagoon, Colville Delta, Sagavanirktok Delta, and Okpilak Delta. The shorebird community was more even and diverse (evenness E and Shannon Weiner Hâ) along the Beaufort Sea compared to the Chukchi Sea and in 2005 versus 2006. Staging phenology varied by species and location and differed for several species from that reported in previous studies. Our results suggest the existence of three foraging habitat guilds among the shorebird species observed in this study: gravel beach, mudflat, and salt marsh/pond edge. A comparison to data collected in the mid-1970s suggests that these foraging associations are conserved through time. Results from this research will be useful to land managers for monitoring the effects of changing environmental conditions and human activity on shorebirds and their habitats in Arctic Alaska.Des Ă©tudes aviaires rĂ©alisĂ©es dans les annĂ©es 1970 sur la plaine cĂŽtiĂšre de lâArctique en Alaska ont permis de constater que les habitats du littoral cĂŽtier revĂȘtent de lâimportance pour les oiseaux de rivage nicheurs de lâArctique en halte migratoire avant la migration dâautomne. Cependant, relativement peu dâinformation rĂ©cente, Ă grande Ă©chelle ou quantitative existe Ă propos de lâutilisation que font les oiseaux de rivage des haltes migratoires de cette rĂ©gion. Afin de localiser des zones de concentration possibles dâoiseaux de rivage dans la rĂ©gion littorale de la plaine cĂŽtiĂšre de lâArctique, nous avons effectuĂ© des levĂ©s aĂ©riens du sud-ouest de la lagune Kasegaluk dans la mer des Tchouktches jusquâĂ Demarcation Point dans la mer de Beaufort au cours des Ă©tĂ©s allant de 2005 Ă 2007. Ces levĂ©s ont permis de repĂ©rer des concentrations durables dâoiseaux de rivage en halte migratoire au cours dâune mĂȘme annĂ©e ainsi que dâune annĂ©e Ă lâautre Ă la baie Peard, Ă pointe Barrow et Ă la lagune Elson, au cap Simpson de mĂȘme que de la baie Smith jusquâau cap Halkett. Parmi les deltas de riviĂšres de la mer de Beaufort, les deltas Sagavanirktok et Kongakut comptaient de fortes concentrations dâoiseaux de rivage en halte migratoire. Nous avons Ă©galement recueilli des donnĂ©es sur les caractĂ©ristiques des populations dâoiseaux de rivage, sur la phĂ©nologie des haltes migratoires de mĂȘme que sur lâutilisation des habitats en 2005 et en 2006 au moyen de levĂ©s terrestres effectuĂ©s Ă six camps, soit celui de la lagune Kasegaluk, de la baie Peard, de la pointe Barrow et de la lagune Elson, du delta Colville, du delta Sagavanirktok et du delta Okpilak. La population dâoiseaux de rivage Ă©tait plus homogĂšne et diverse (homogĂ©nĂ©itĂ© E et Shannon Weiner Hâ) le long de la mer de Beaufort comparativement Ă la mer des Tchouktches, ainsi quâen 2005 par rapport Ă 2006. La phĂ©nologie en halte migratoire variait selon les espĂšces et les emplacements, et diffĂ©rait pour plusieurs espĂšces de celles signalĂ©es dans le cadre dâĂ©tudes ultĂ©rieures. Nos rĂ©sultats laissent croire Ă lâexistence de trois guildes dâhabitats de fourrage chez les espĂšces dâoiseaux de rivage observĂ©es dans cette Ă©tude : plage de gravier, vasiĂšre et marais salant ou bordure dâĂ©tang. La comparaison des donnĂ©es recueillies au milieu des annĂ©es 1970 laisse entendre que ces associations de fourrage se sont conservĂ©es au fil du temps. Les rĂ©sultats dĂ©coulant de cette recherche seront utiles aux gestionnaires de terres dans le cadre de la surveillance des effets des conditions environnementales changeantes et de lâactivitĂ© humaine sur les oiseaux de rivage et leurs habitats de lâArctique alaskien
Phenomenological viability of string and M-theory scenarios
We analyze the constraints that a correct phenomenology and the absence of
dangerous charge and color breaking (CCB) minima or unbounded from below (UFB)
directions impose on the parameter space of different superstring and M-theory
scenarios. Namely, we analyze in detail the case where supersymmetry (SUSY)
breaking is driven by non-vanishing dilaton and/or moduli F-terms in weakly and
strongly coupled strings, and the specific case where the mechanism of SUSY
breaking is gaugino condensation with or without the participation of
non-perturbative contributions to the K{\"a}hler potential. The results
indicate that, only in some small windows of the parameter space all the
previous tests are succesfully passed. We also discuss the impact of
non-universality of the soft breaking terms on CCB/UFB bounds.Comment: 18 pages + 10 figures, PostScript fil
Repeated sprint ability and muscular responses according to the age category in elite youth soccer players
The aim of this study was to analyse the influence of age category on the performance and muscle response after a Repeated Sprint Ability (RSA) test in elite youth soccer players. 62 soccer players from three different age categories (Under 14 [n = 21], Under 16 [n = 20], and Under 18 [n = 21]) were selected to participate in this study. Players completed an RSA test (7 Ă 30 m) with a 20-s recovery between sprints. The muscular response to an electrical stimulus before and after the test of both the biceps femoris (BF) and the rectus femoris (RF) were evaluated using tensiomyography. A two-way ANOVA was used to analyse the differences in RSA parameters in each of the four distance-intervals (0â5; 5â25; 25â30; 0â30 m) between sprint and age category. The U14 age category (5.30 ± 0.30 s) showed higher mean sprint times than U16 (4.62 ± 0.20 s) and U18 (4.46 ± 0.17 s) throughout the entire test (p 0.05), although the delay time (Td) of the muscle was significantly lower after the RSA test in U16 players (â1.53 ms, CI95%: â2.607 to â0.452; ES: 0.38) and U18 players (â1.11 ms, CI95%: â2.10 to â0.12; ES: 0.22). In conclusion, this study revealed an increase in physical performance and muscle response variability after a repeated sprint ability test in the U16's and over. The fatigue induced by the RSA test did not show differences depending on the age of the players, although muscle mechanical properties were altered after the RSA test in U16 and U18 soccer players. Physical performance and muscle response can be complementary variables in managing fatigue according to the age category in soccer players.Sin financiaciĂłn3.367 JCR (2019) Q1, 20/81 Physiology1.211 SJR (2019) Q2, 52/186 Physiology, 31/107 Physiology (medical)No data IDR 2019UE
Hadron collider limits on anomalous couplings
A next-to-leading log calculation of the reactions and
is presented including a tri-boson
gauge coupling from non-Standard Model contributions. Two approaches are made
for comparison. The first approach considers the tri-boson coupling
as being uniquely fixed by tree level unitarity at high energies to its
Standard Model form and, consequently, suppresses the non-Standard Model
contributions with form factors. The second approach is to ignore such
considerations and calculate the contributions to non-Standard Model tri-boson
gauge couplings without such suppressions. It is found that at Tevatron
energies, the two approaches do not differ much in quantitative results, while
at Large Hadron Collider (LHC) energies the two approaches give significantly
different predictions for production rates. At the Tevatron and LHC, however,
the sensitivity limits on the anomalous coupling of are too weak to
usefully constrain parameters in effective Lagrangian models.Comment: Revtex 23 pages + 8 figures, UIOWA-94-1
Self-Affirmation Activates Brain Systems Associated with Self-Related Processing and Reward and is Reinforced by Future Orientation
Self-affirmation theory posits that people are motivated to maintain a positive self-view and that threats to perceived self-competence are met with resistance. When threatened, self-affirmations can restore self-competence by allowing individuals to reflect on sources of self-worth, such as core values. Many questions exist, however, about the underlying mechanisms associated with self-affirmation. We examined the neural mechanisms of self-affirmation with a task developed for use in a functional magnetic resonance imaging environment. Results of a region of interest analysis demonstrated that participants who were affirmed (compared with unaffirmed participants) showed increased activity in key regions of the brainâs self-processing (medial prefrontal cortexâ+âposterior cingulate cortex) and valuation (ventral striatumâ+âventral medial prefrontal cortex) systems when reflecting on future-oriented core values (compared with everyday activities). Furthermore, this neural activity went on to predict changes in sedentary behavior consistent with successful affirmation in response to a separate physical activity intervention. These results highlight neural processes associated with successful self-affirmation, and further suggest that key pathways may be amplified in conjunction with prospection
The visual fields of common guillemots Uria aalge and Atlantic puffins Fratercula arctica: foraging, vigilance and collision vulnerability
Significant differences in avian visual fields are found between closely related species that differ in their foraging technique. We report marked differences in the visual fields of two auk species. In air, Common Guillemots Uria aalge have relatively narrow binocular fields typical of those found in non-passerine predatory birds. Atlantic Puffins Fratercula arctica have much broader binocular fields similar to those that have hitherto been recorded in passerines and in a penguin. In water, visual fields narrow considerably and binocularity in the direction of the bill is probably abolished in both auk species. Although perceptual challenges associated with foraging are similar in both species during the breeding season, when they are piscivorous, Puffins (but not Guillemots) face more exacting perceptual challenges when foraging at other times, when they take a high proportion of small invertebrate prey. Capturing this prey probably requires more accurate, visually guided bill placement and we argue that this is met by the Puffin's broader binocular field, which is retained upon immersion; its upward orientation may enable prey to be seen in silhouette. These visual field configurations have potentially important consequences that render these birds vulnerable to collision with human artefacts underwater, but not in air. They also have consequences for vigilance behaviour
Functions and Requirements of the CMS Centre at CERN
This report of the CMS Centre Requirements and Technical Assessment Group describes the functions of the CMS Centre on the CERN Meyrin site in terms of data quality monitoring, calibrations and rapid analysis and operations of the offline computing systems. It then defines the corresponding requirements for building space, computing consoles and other equipment, technical services and refurbishments, and communications systems
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