The long wavelength limit of hard thermal loop effective actions

We derive a closed form expression for the long wavelength limit of the effective action for hard thermal loops in an external gravitational field. It is a function of the metric, independent of time derivatives. It is compared and contrasted with the static limit, and with the corresponding limits in an external Yang-Mills field. (C) 2009 Elsevier B.V. All rights reserved.

Finite temperature effective actions

We present, from first principles, a direct method for evaluating the exact fermion propagator in the presence of a general background held at finite temperature, which can be used to determine the finite temperature effective action for the system. As applications, we determine the complete one loop finite temperature effective actions for (0 + 1)-dimensional QED as well as the Schwinger model. These effective actions, which are derived in the real time (closed time path) formalism, generate systematically all the Feynman amplitudes calculated in thermal perturbation theory and also show that the retarded (advanced) amplitudes vanish in these theories. (C) 2009 Elsevier B.V. All rights reserved.

Crossed products by twisted partial actions and graded algebras

For a twisted partial action e of a group G on an (associative non-necessarily unital) algebra A over a commutative unital ring k, the crossed product A x(Theta) G is proved to be associative. Given a G-graded k-algebra B = circle plus(g is an element of G) B-g with the mild restriction of homogeneous non-degeneracy, a criteria is established for B to be isomorphic to the crossed product B-1 x(Theta) G for some twisted partial action of G on B-1. The equality BgBg-1 B-g = B-g (for all g is an element of G) is one of the ingredients of the criteria, and if it holds and, moreover, B has enough local units, then it is shown that B is stably isomorphic to a crossed product by a twisted partial action of G. (c) 2008 Elsevier Inc. All rights reserved.

Partial projective representations and partial actions

The concept of a partial projective representation of a group is introduced and studied. The interaction with partial actions is explored. It is shown that the factor sets of partial projective representations over a field K are exactly the K-valued twistings of crossed products by partial actions. (C) 2009 Elsevier B.V. All rights reserved.

Actions of octocoral and tobacco cembranoids on nicotinic receptors

Nicotinic acetylcholine receptors (AChRs) are pentameric proteins that form agonist-gated cation channels through the plasma membrane. AChR agonists and antagonists are potential candidates for the treatment of neurodegenerative diseases. Cembranoids are naturally occurring diterpenoids that contain a 14-carbon ring. These diterpenoids interact with AChRs in complex ways: as irreversible inhibitors at the agonist sites, as noncompetitive inhibitors, or as positive modulators, but no cembranoid was ever shown to have agonistic activity on AChRs. The cembranoid eupalmerin acetate displays positive modulation of agonist-induced currents in the muscle-type AChR and in the related gamma-aminobutyric acid (GABA) type A receptor. Moreover, cembranoids display important biological effects, many of them mediated by nicotinic receptors. Cembranoids from tobacco are neuroprotective through a nicotinic anti-apoptotic mechanism preventing excitotoxic neuronal death which in part could result from anti-inflammatory properties of cembranoids. Moreover, tobacco cembranoids also have anti-inflammatory properties which could enhance their neuroprotective properties. Cembranoids from tobacco affect nicotine-related behavior: they increase the transient initial ataxia caused by first nicotine injection into naive rats and inhibit the expression of locomotor sensitization to repeated injections of nicotine. In addition, cembranoids are known to act as anti-tumor compounds. In conclusion, cembranoids provide a promising source of lead drugs for many clinical areas, including neuroprotection, smoking-cessation, and anti-cancer therapies. (C) 2009 Elsevier Ltd. All rights reserved.

Temperature (over) compensation in an oscillatory surface reaction

Biological rhythms are regulated by homeostatic mechanisms that assure that physiological clocks function reliably independent of temperature changes in the environment. Temperature compensation, the independence of the oscillatory period on temperature, is known to play a central role in many biological rhythms, but it is rather rare in chemical oscillators. We study the influence of temperature on the oscillatory dynamics during the catalytic oxidation of formic acid on a polycrystalline platinum electrode. The experiments are performed at five temperatures from 5 to 25 degrees C, and the oscillations are studied under galvanostatic control. Under oscillatory conditions, only non-Arrhenius behavior is observed. Overcompensation with temperature coefficient (q(10), defined as the ratio between the rate constants at temperature T + 10 degrees C and at T) < I is found in most cases, except that temperature compensation with q(10) approximate to I predominates at high applied currents. The behavior of the period and the amplitude result from a complex interplay between temperature and applied current or, equivalently, the distance from thermodynamic equilibrium. High, positive apparent activation energies were obtained under voltammetric, nonoscillatory conditions, which implies that the non-Arrhenius behavior observed under oscillatory conditions results from the interplay among reaction steps rather than, from a weak temperature dependence of the individual steps.

Förståelse, bedömningar och hjälpinsatser : Socialarbetares arbete med män som våldsoffer

This report outlines the background to, and presents the results from the Crime Victim Compensation and Support Authority funded project "Social Workers' understanding of men as victims of crime". The project aimed at describing and analyzing how social workers understand and work with male victims of violence. More precisely, the research has focused on how social workers describe men's vulnerability and how they understand men's needs for assistance, what assistance that is provided and the way the constellations of perpetrators and victims of different gender and contexts in which the violence occurs in affect the understanding of male victims of violence. The study has also been devoted to the question of whether the Support Centers for young crime victims in Sweden provide different types of and different amount of help to young men and women afflicted of violence. The project was conducted in three substudies. The results from substudy 1 show that more young men than women seek support from the Support centers studied. Men predominate in number of cases and in the different categories of crime. The results also show that young men on average receive less assistance over a shorter average duration than young women. This applies irrespective of the category of offense that the vulnerability applies to. Furthermore, the young men, compared to the women, proportionally receive fewer interventions characterized as support and a greater proportion of interventions in the form of information. The results also show that the young men are referred on for further action to a lesser extent than is the case for women. The results from substudy 2 show that social workers tend to focus on whether, and to what extent, young men who are victims of violence themselves have behaved provocatively before the violence incident and if they have put themselves in a social situation that could be interpreted as having contributed to an escalation of the violence they have been subjected to. The results from substudy 2 also show that social workers talk about the men as active in the violent situations they have been involved in and dwell on the extent to which the young men's own actions have contributed to the violence. The results also show that young men who are victims of violence are described as "reluctant" victims who are trying to cope with their situation on their own without the involvement of professional or other helper. The young men are also described as reluctant to talk about their feelings. The results of substudy 3 show that social workers believe that young men, when they become victims of violence, risks losing their sense of autonomy, initiative and decisiveness, that is, attributes that are often linked to the dominating cultural image of masculinity. Furthermore, the results show that social workers estimate that men's practicing of their masculinity, but also the response that men who are traumatized get from society, creates difficulties for them to get help. The results from substudy 3 also shows that attributes and actions that can be connected to the masculinity of young men's, as well as a lack of such attributes and actions are considered to be adequate explanations for the violence the men has suffered. When it comes to violence in public places it is the masculinity that explains the violence and its escalation. When it comes to domestic violence it is the lack of expected male attributes and actions that are used as explanations for the violence that have occurred. The discussion is devoted to the question of how the results should be understood based on the concepts of self-performance, interpretation, negotiation and categorizations, and the consequences the results obtained should have for gender sensitive social work given to abused men.

Ethics in a capitalistic society

The problem of semantics is inherent in any discussion of ethics. The general term "ethics" is itself commonly confused. In addition, systems of ethics must be built upon assumptions, and assumptions are necessarily subject to lengthy debate. These two problems are encountered in my investigation of the ethical practices of the modern business community and to remedy the situation I have taken two steps: the first being an attempt to clarify the meaning of terms used therein;-and the second being a clear description of the assumptions utilized to further my analysis. To satisfy those who would disagree with these assumptions, I have attempted to outline the consequences of differing premises. The first assumption in my discussion is that the capitalistic economy is powered by the motivation supplied by man's self-interest. We are conditioned to basing our courses of action upon an orientation toward gratifying this self-interest. Careers are chosen by blending aptitude, interest, and remuneration. of course, some people are less materially inclined than others, but the average member of our capitalistic society is concerned with the physical rewards derived from his employment. Status and happiness are all-important considerations in pursuing a chosen course of action, yet all too often they are measured in physical terms. The normal self-interest natural to mankind is heightened in capitalism, due to the emphasis placed upon material compensation. Our thinking becomes mechanistic as life devolves into a complex game played by the rules. We are accustomed to performing meaningless or unpleasant duties to fulfill our gratifications. Thought, consequently, interferes with the completion of our everyday routines. We learn quickly not to be outspoken, as the outspoken one threatens the security of his fellow man. The majority of the people are quite willing to accept others views on morality, and indeed this is the sensible thing to do as one does not risk his own neck. The unfortunate consequence of this situation has been the substitution of the legal and jural for the moral and ethical. Our actions are guided by legal considerations and nowhere has this been more evident than in the business community. The large legal departments of modern corporations devote full time to inspecting the legality of corporate actions. The business community has become preoccupied with the law, yet this is necessarily so. Complex, modern, capitalistic society demands an elaborate framework of rules and regulations. Without this framework it would be impossible to have an orderly economy, to say nothing of protecting the best interests of the people. However, the inherent complexities, contradictions, and sometimes unfair aspects of our legal system can tempt men to take things into their own hands. From time to time cases arise where men have broken laws while acting in good faith, and other cases where men have been extremely unethical without being illegal. Examples such as these foster the growth of cynicism, and generally create an antagonistic attitude toward the law on the part of business. My second assumption is that the public, on the whole, has adopted an apathetic attitude toward business morality. when faced with an ethical problem, far too many people choose to cynically assume that, if I don't do it someone else will. "The danger of such an assumption lies in that it eliminates many of the inhibitions that normally would preclude unethical action. The preventative factor in contemplating an unethical act not only lies in it going against the "right course of action", but also in that it would display the actor as one of the few, immoral practitioners. However, if the contemplator feels that many other people follow the same course of action, he would not feel himself to be so conspicuous. These two assumptions underly my entire discussion of modern business ethics., and in my judgment are the two most important causal factors in unethical acts perpetrated by the business community. The future elimination of these factors seems improbable, if not futile, yet there is no reason to consider things worse than they ever have been before. The heightened public interest in business morality undoubtedly lies in part in the fact that examples of corporate malpractice are of such magnitude in scope, and hence more newsworthy.

Addressing Compensation Rates Below Market Value

Strategies for Recruiting and Retaining Faculty and Staff (Business Affairs Forum, attached): Many institutions face limitations on the salary rates they can offer faculty and staff due to decreases in state funding, which can create challenges in recruitment and retention of qualified employees. This brief explores strategies institutions use to lessen the impact of budget limitations on faculty and staff salaries and to recruit and retain faculty in spite of limited salary offerings.

Evaluating Department Chair and Program Director Compensation

This brief examines compensation policies for department chairs and program directors at public institutions, with a particular focus on the factors that determine compensation. The report includes an analysis of department chairs and program director responsibilities, monetary compensation, and non-monetary compensation.

Government actions to support coffee producers - an investigation of possible measures from the European Union

We outline possible actions to be adopted by the European Union to ensure a better share of total coffee revenues to producers in developing countries. The way to this translates, ultimately, in producers receiving a fair price for the commodity they supply, i.e., a market price that results from fair market conditions in the whole coffee producing chain. We plead for proposals to take place in the consuming countries, as market conditions in the consuming-countries side of the coffee producing chain are not fair; market failures and ingenious distortions are responsible for the enormous asymmetry of gains in the two sides. The first of three proposals for consumer government supported actions is to help in the creation of domestic trading companies for achieving higher export volumes. These tradings would be associated to roasters that, depending on the final product envisaged, could perform the roasting in the country and export the roasted – and sometimes ground – coffee, breaking the increasing importers-exporters verticalisation. Another measure would be the systematic provision of basic intelligence on the consuming markets. Statistics of the quantities sold according to mode of consumption, by broad “categories of coffee” and point of sale, could be produced for each country. They should be matched to the exports/imports data and complemented by (aggregate) country statistics on the roasting sector. This would extremely help producing countries design their own market and producing strategies. Finally, a fund, backed by a common EU tax on roasted coffee – created within the single market tax harmonisation programme, is suggested. This European Coffee Fund would have two main projects. Together with the ICO, it would launch an advertising campaign on coffee in general, aimed at counterbalancing the increasing “brandification” of coffee. Basic information on the characteristics of the plant and the drink would be passed, and the effort could be extended to the future Eastern European members of the Union, as a further assurance that EU processors would not have a too privileged access to these new markets. A quality label for every coffee sold in the Union could complement this initiative, helping to create a level playing field for products from outside the EU. A second project would consist in a careful diversification effort, to take place in selected producing countries.

Os benefícios de impactar: as mitigações contraditórias do Conselho de Desenvolvimento Urbano do Recife

Esta dissertação estuda as medidas mitigadoras nos processos de licenciamento dos Empreendimentos de Impacto, determinadas pelo Conselho de Desenvolvimento Urbano do Recife – CDU. Busca contribuir com a eficácia da administração pública municipal quanto aos critérios e considerações necessárias para a aprovação de Empreendimentos de Impacto, num contexto do aumento significativo da demanda por essa tipologia de projeto nos órgãos de regulação. Foi analisado o processo de discussão e determinação das diretrizes de mitigação para os Empreendimentos de Impacto na cidade do Recife na última década. A coleta dos dados teve como base a pesquisa documental de legislações e registros oficiais, na tramitação dos projetos, bem como da utilização de entrevistas espontâneas, semiestruturadas, com atores do poder público e sociedade civil. Esclarece o papel e a importância do CDU no processo de gestão democrática, mostrando as características dos Empreendimentos de Impacto, bem como as influências negativas e positivas das diretrizes mitigadoras na qualidade de vida urbana e o entendimento sobre quem é o real beneficiado. As análises constatam que as medidas mitigadoras propostas são ineficazes, pois, são ações compulsórias, ou seja, obrigações legais que o empreendedor deveria cumprir. As diretrizes de compensações são baseadas em diagnósticos inadequados, sem a incorporação de propostas dos grupos sociais afetados e sem avaliações da eficiência das mitigações dirimidas. Na maioria das vezes, apenas servem de incremento local, beneficiando o empreendimento, sem um planejamento macro, desconsiderando o papel da gestão pública no desenvolvimento sustentável da cidade.

Uma análise histórico-comparativa dos modelos de financiamento dos empreendimentos hidrelétricos de Xingó e Santo Antônio

O objetivo deste estudo histórico-comparativo é verificar a apropriação pelo setor elétrico, mais especificamente no segmento de geração de energia elétrica, das inovações financeiras disponibilizadas para o financiamento de empresas, difundidas a partir da década de 80, mediante levantamento da legislação balizadora da atuação das concessionárias do setor e conectá-las à forma utilizada de seu financiamento na expansão da geração hidrelétrica. Para isso, utiliza-se da comparação das Usinas Hidrelétricas de Xingó e Santo Antônio, de porte equivalentes, concedidas para a exploração hidráulica em períodos distintos e separadas por um período de alteração de modelo regulatório, compreendido entre 1988 e 2004. A análise e comparação das características das usinas consideradas relevantes para o estudo: empreendimento, sociedade, remuneração, forma e fontes de financiamento, permitiram identificar as distinções nessas características e suas vinculações com a regulamentação setorial e diretrizes da forma de gestão adotada pelo estado em cada período, além do alinhamento societário para a utilização das inovações financeiras na captação de recursos destinados aos investimentos de geração do setor.