oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 59 )

2017 ( 80 )

2016 ( 73 )

2015 ( 1280 )

自定义范围…

匹配条件: “PAUL HOCKINGS” ,找到相关结果约23540条。
列表显示的所有文章,均可免费获取
第1页/共23540条
每页显示
THE BADAGAS SOMETIME REFUGEES IN A NEW LAND
PAUL HOCKINGS
The Dawn Journal , 2012,
Abstract: It seems that hardly a week passes without the news media reporting another harrowing account of the movement of refugees somewhere: Afghan boat people heading for Australia, Africans trying to get to a better life in Italy, Ethiopians living in Moscow Airport. Their stories are often horrifying, their health and sheer numbers mind-boggling, and their futures inconceivable. Yet most of these people do survive, long beyond the day's news headlines. Some finally get the chance to return home, while others settle down in another land.Sociologists have developed three categories to help explain the motivations which may lead people unwillingly into refugee status. Some "majority-identified" refugees, people who continue to identify with their homeland but not with its current government or social conditions: they fondly expect to return home at a later date. Secondly, there are "events-alienated" refugees who have been driven from their homeland by force or intolerable conditions, and who doubt they will ever set eyes on it again. Third, there are "self-alienated" refugees who move away for ideological or other personal reasons, including work or educational opportunities.
N=4 Super Yang Mills at Finite Density: the Naked Truth
Nick Evans,James Hockings
Physics , 2002, DOI: 10.1088/1126-6708/2002/07/070
Abstract: We study N=4 super Yang Mills theory at finite U(1)_R charge density (and temperature) using the AdS/CFT Correspondence. The ten dimensional backgrounds around spinning D3 brane configurations split into two classes of solution. One class describe spinning black holes and have previously been extensively studied, and interpreted, in a thermodynamic context, as the deconfined high density phase of the dual field theory. The other class have naked singularities and in the supersymmetric limit are known to correspond to multi-centre solutions describing the field theory in the Coulomb phase. We provide evidence that the non-supersymmetric members of this class represent naked, spinning D-brane distributions describing the Coulomb branch at finite density. At a critical density a phase transition occurs to a spinning black hole representing the deconfined phase where the higgs vevs have evaporated. We perform a free energy calculation to determine the phase diagram of the Coulomb branch at finite temperature and density.
From Forest to Farm: Systematic Review of Cultivar Feeding by Chimpanzees – Management Implications for Wildlife in Anthropogenic Landscapes
Kimberley J. Hockings, Matthew R. McLennan
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0033391
Abstract: Crop-raiding is a major source of conflict between people and wildlife globally, impacting local livelihoods and impeding conservation. Conflict mitigation strategies that target problematic wildlife behaviours such as crop-raiding are notoriously difficult to develop for large-bodied, cognitively complex species. Many crop-raiders are generalist feeders. In more ecologically specialised species crop-type selection is not random and evidence-based management requires a good understanding of species' ecology and crop feeding habits. Comprehensive species-wide studies of crop consumption by endangered wildlife are lacking but are important for managing human–wildlife conflict. We conducted a comprehensive literature search of crop feeding records by wild chimpanzees (Pan troglodytes), a ripe-fruit specialist. We assessed quantitatively patterns of crop selection in relation to species-specific feeding behaviour, agricultural exposure, and crop availability. Crop consumption by chimpanzees is widespread in tropical Africa. Chimpanzees were recorded to eat a considerable range of cultivars (51 plant parts from 36 species). Crop part selection reflected a species-typical preference for fruit. Crops widely distributed in chimpanzee range countries were eaten at more sites than sparsely distributed crops. We identified ‘high’ and ‘low’ conflict crops according to their attractiveness to chimpanzees, taking account of their importance as cash crops and/or staple foods to people. Most (86%) high conflict crops were fruits, compared to 13% of low conflict crops. Some widely farmed cash or staple crops were seldom or never eaten by chimpanzees. Information about which crops are most frequently consumed and which are ignored has enormous potential for aiding on-the-ground stakeholders (i.e. farmers, wildlife managers, and conservation and agricultural extension practitioners) develop sustainable wildlife management schemes for ecologically specialised and protected species in anthropogenic habitats. However, the economic and subsistence needs of local people, and the crop-raiding behaviour of sympatric wildlife, must be considered when assessing suitability of particular crops for conflict prevention and mitigation.
The electric dipole form factor of the nucleon
W. H. Hockings,U. van Kolck
Physics , 2005, DOI: 10.1016/j.physletb.2004.11.043
Abstract: The electric dipole form factor of the nucleon stemming from the QCD $\bar{\theta}$ term is calculated in chiral perturbation theory in leading order. To this order, the form factor originates from the pion cloud. Its momentum-dependence is proportional to a non-derivative time-reversal-violating pion-nucleon coupling, and the scale for momentum variation--appearing, in particular, in the radius of the form factor--is the pion mass.
Secrets of the Metric In N=4 and N=2* Geometries
James Babington,Nick Evans,James Hockings
Physics , 2001, DOI: 10.1088/1126-6708/2001/07/034
Abstract: The metric of the gravity dual of a field theory should contain precisely the same information as the field theory. We discuss this connection in the N=4 theory where a scalar vev may be introducedat the level of 5d supergravity and the solutions lifted to 10d. We stress the role of brane probing in finding the coordinates appropriate to the field theory. In these coordinates the metric parametrizes the gauge invariant operators of the field theory and either side of the duality is uniquely determined by the other. We follow this same chain of computations for the 10d lift of the N=2* geometry of Pilch and Warner. The brane probe of the metric reveals the 2d moduli space and the functional form of the gauge coupling. In the coordinates appropriate to the field theory the metric on moduli space takes a very simple form and one can read off the gravity predictions for operators in the field theory. Surprisingly there is logarithmic renormalization even in the far UV where the field theory reverts to N=4 super Yang-Mills. We extend the analysis of Buchel et al to find the D3 brane source distribution that generates the supergravity prediction for the gauge coupling for the whole class of solutions corresponding to different points on moduli space. This distribution does not account for the logarithmic behaviour in the rest of the metric though. We discuss possible resolutions of the discrepancy.
In Pursuit of Knowledge: Addressing Barriers to Effective Conservation Evaluation
Madeleine C. Bottrill,Marc Hockings,Hugh P. Possingham
Ecology and Society , 2011,
Abstract: Evaluation, the process of assessing the effectiveness of programs and activities, has gained increasing attention in the conservation sector as programs seek to account for investments, measure their impacts, and adapt interventions to improve future outcomes. We conducted a country-wide evaluation of terrestrial-based conservation programs in Samoa. Though rarely applied, the benefit of evaluating multiple projects at once is that it highlights factors which are persistent and influential across the entire conservation sector. We found mixed success in achieving goals among conservation programs; yet this result is surrounded by uncertainty because of the quality of existing evidence on project outcomes. We explore the role of different components of the conservation management system, i.e., context, planning, inputs, processes, and outputs, in facilitating and/or constraining collection of data on project outcomes, and thereby assessment of whether projects were successful. Our study identified a number of direct and indirect barriers that affected the capacity of projects to carry out informative evaluations and generate knowledge on conservation progress in Samoa. These attributes and mechanisms include: the availability and management of data, design and planning of projects, and systems for reporting among donors and proponents. To overcome these barriers to evaluation, we believe that a shift in institutional approaches to reporting outcomes is needed, from a reflective way of thinking to a more prospective outlook.
What Constitutes Success in Pacific Island Community Conserved Areas?
Joanna C. Axford,Marc T. Hockings,R W. (Bill). Carter
Ecology and Society , 2008,
Abstract: In recent years, few if any community conserved areas (CCAs) in the Pacific island region have been regarded as being successful. However, as success is rarely defined, what constitutes “success” is not clear. This paper reports an investigation into the way “outsiders” perceive success in Pacific island CCAs. An exploratory survey revealed six umbrella themes of success: the locus of control; local benefits; resource aspects; management; external stakeholder involvement; and sustainability. Multivariate analysis distinguished two groups, a Big picture group and a Locally focused group. These differ in how they define success, as well as their organizational alignment. The Big picture group, largely from funder agencies and international NGOs, were focused on the broad issues of success, especially the sustainability of CCAs. The Locally focused group was concerned with the practical workings and needs of successful CCAs in the Pacific; many in this group were based with Pacific island governments and NGOs or CCAs. The study concludes that success in CCAs should not be defined solely on project objectives, especially when these have been developed by an external entity or under their guidance. If they are, high rates of failure are to be expected.
The Effective Chiral Lagrangian From the Theta Term
E. Mereghetti,W. H. Hockings,U. van Kolck
Physics , 2010, DOI: 10.1016/j.aop.2010.03.005
Abstract: We construct the effective chiral Lagrangian involving hadronic and electromagnetic interactions originating from the QCD theta term. We impose vacuum alignment at both quark and hadronic levels, including field redefinitions to eliminate pion tadpoles. We show that leading time-reversal-violating (TV) hadronic interactions are related to isospin-violating interactions that can in principle be determined from charge-symmetry-breaking experiments. We discuss the complications that arise from TV electromagnetic interactions. Some implications of the expected sizes of various pion-nucleon TV interactions are presented, and the pion-nucleon form factor is used as an example.
Chimpanzees Share Forbidden Fruit
Kimberley J. Hockings, Tatyana Humle, James R. Anderson, Dora Biro, Claudia Sousa, Gaku Ohashi, Tetsuro Matsuzawa
PLOS ONE , 2007, DOI: 10.1371/journal.pone.0000886
Abstract: The sharing of wild plant foods is infrequent in chimpanzees, but in chimpanzee communities that engage in hunting, meat is frequently used as a ‘social tool’ for nurturing alliances and social bonds. Here we report the only recorded example of regular sharing of plant foods by unrelated, non-provisioned wild chimpanzees, and the contexts in which these sharing behaviours occur. From direct observations, adult chimpanzees at Bossou (Republic of Guinea, West Africa) very rarely transferred wild plant foods. In contrast, they shared cultivated plant foods much more frequently (58 out of 59 food sharing events). Sharing primarily consists of adult males allowing reproductively cycling females to take food that they possess. We propose that hypotheses focussing on ‘food-for-sex and -grooming’ and ‘showing-off’ strategies plausibly account for observed sharing behaviours. A changing human-dominated landscape presents chimpanzees with fresh challenges, and our observations suggest that crop-raiding provides adult male chimpanzees at Bossou with highly desirable food commodities that may be traded for other currencies.
Involvement of a specificity proteins-binding element in regulation of basal and estrogen-induced transcription activity of the BRCA1 gene
Jennifer K Hockings, Stephanie C Degner, Sherif S Morgan, Michael Q Kemp, Donato F Romagnolo
Breast Cancer Research , 2008, DOI: 10.1186/bcr1987
Abstract: Using transfection studies with wild-type and mutated BRCA1 promoter constructs, electromobility binding and shift assays, and DNA-protein interaction and chromatin immunoprecipitation assays, we investigated the role of Sp-binding sites and cAMP response element (CRE)-binding sites harbored in the proximal BRCA1 promoter.We report that in the BRCA1 promoter the AP-1 site is flanked upstream by an element (5'-GGGGCGGAA-3') that recruits Sp1, Sp3, and Sp4 factors, and downstream by a half CRE-binding motif (5'-CGTAA-3') that binds CRE-binding protein. In ER-α-positive MCF-7 cells and ER-α-negative Hela cells expressing exogenous ER-α, mutation of the Sp-binding site interfered with basal and estrogen-induced BRCA1 transcription. Conversely, mutation of the CRE-binding element reduced basal BRCA1 promoter activity but did not prevent estrogen activation. In combination with the AP-1/CRE sites, the Sp-binding domain enhanced the recruitment of nuclear proteins to the BRCA1 promoter. Finally, we report that the MEK1 (mitogen-activated protein kinase kinase-1) inhibitor PD98059 attenuated the recruitment of Sp1 and phosphorylated ER-α, respectively, to the Sp and AP-1 binding element.These cumulative findings suggest that the proximal BRCA1 promoter segment comprises cis-acting elements that are targeted by Sp-binding and CRE-binding proteins that contribute to regulation of BRCA1 transcription.Gene expression in mammary tissue is under the control of ovarian steroids, including estrogen, which regulates transcription activity of target promoters by stimulating the recruitment of either the estrogen receptor (ER)-α or ER-β [1]. In the classical pathway, the liganded ER-α homodimerizes and binds directly to DNA at estrogen response elements (EREs) [2]. The physical contact of the ER-α homodimer with DNA facilitates the subsequent recruitment of coregulators [3]. The latter factors contribute to chromatin reorganization and transcriptional coactivation [4]. Alternatively,
第1页/共23540条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.