Pattern formation on the surface of cationic-anionic cylindrical aggregates

Charged pattern formation on the surfaces of self--assembled cylindrical micelles formed from oppositely charged heterogeneous molecules such as cationic and anionic peptide amphiphiles is investigated. The net incompatibility $\chi$ among different components results in the formation of segregated domains, whose growth is inhibited by electrostatics. The transition to striped phases proceeds through an intermediate structure governed by fluctuations, followed by states with various lamellar orientations, which depend on cylinder radius $R_c$ and $\chi$. We analyze the specific heat, susceptibility $S(q^*)$, domain size $\Lambda=2\pi/q^*$ and morphology as a function of $R_c$ and $\chi$.Comment: Sent to PRL 11Jan05 Transferred from PRL to PRE 10Jun0

Peptide-based microcapsules obtained by self-assembly and microfluidics as controlled environments for cell culture

Funding for this study was provided by the Portuguese Foundation for Science and Technology (FCT, grant PTDC/EBB-BIO/ 114523/2009). D. S. Ferreira gratefully acknowledges FCT for the PhD scholarship (SFRH/BD/44977/2008)

Black American perceptions of social workers

This study examines Black Americans\u27 perceptions of social workers and of the role of the Black church and extended family in assisting individuals in the Black community. The study employed a survey design with self-administered questionnaires. Sixty respondents participated in the study and the study was conducted at two Black churches in the San Bernardino County

Documenting Abilities And Achievements: The Use Of Professional Portfolios For Accounting Students And Young Accounting Professionals

Requiring students to develop portfolios as part of the educational process is a common technique that is utilized by educators who teach various subjects from kindergarten through graduate school. Collecting course assignments and projects into a portfolio helps students see the development of their skills as they progress through school toward graduation. Portfolio development is prevalent in certain majors – such as art and education – as well as in certain professions - such as marketing and communication.  While portfolios are not typically utilized in the profession of Accounting, there are many benefits to requiring that undergraduate Accounting majors track their educational progress with a portfolio.  Doing so will allow Accounting majors to understand their learning more – make it less cerebral and more recognizable.  Portfolios will also assist the Accounting major to achieve entry-level professional employment

Metallurgical case studies from the British Museum\u27s collections of pre-hispanic gold

El Museo Británico ha comenzado recientemente un programa de estudio científico y tecnológico de su colección de objetos de orfebrería prehispánica. Para este programa se usa microscopía óptica y electrónica de barrido, análisis radiográficos y de fluorescencia de rayos X. En este artículo se presentan estudios de caso interesantes que muestran un rango de prácticas de orfebrería que incluye dorado, uso de matrices de piedra para la elaboración de moldes e identificación de falsificacione

Partial diffusion and backsliding in international standards

Built through international efforts and agreements, international accounting standards are the foundation that supports cross border investment. These standards are political and, as with other areas of international capital regulation, are built through a mix of public and private bodies. Yet, despite nearly sixty years of efforts, the international community has not produced a consistent set of standards. Researchers have attempted to explain this failure through theories of power (economic and other) as well as with theories of political ties and legal systems (Eaton 2005; Eberle & Lutz 2008; Posner 2009 & 2010; Ramanna & Sletten 2009; Simmons 2001; Veron 2007). These theories have been inadequate and sometimes empirically wrong in explaining and predicting the politics and spread of International Financial Reporting Standards (IFRS). One reason why these theories have been inadequate is that they have failed to account for the partial and incomplete nature of typical agreements on international accounting standards. For example, despite an agreement of complete convergence, China and the EU have only selectively applied some international accounting rules to various sectors of their economies. Taking partial cooperation into account not only helps explain accounting standards but has implications for studies of international cooperation more broadly I posit cooperation on these financial agreements, which is often partial and incomplete, can be explained by the role of private regulators in setting international standards. This contrasts with Drezner’s (2007) theory that great powers are responsible for international regulatory outcomes, and with Fioretos’ (2010) argument that international regulatory outcomes are a product of historical institutionalism. The interaction among governments and transgovernmental actors has been widely studied regarding similar capital regulation, but I approach IFRS differently by analyzing private regulators’ interactions with governments and firms. For this analysis, I have built an original dataset of international accounting standards agreements from 1980 to 2016 that assesses the level of cooperation between countries and how private regulators are involved. To explain the unique international issues surrounding financial standards, I develop three models or lenses: A Prisoner’s Dilemma model, a coordination model, and a compliance model. Chapter two discusses the cooperation model and how countries initially move toward one standard among several. My main argument is economic imbalances push countries away from cooperation on financial rules. I posit capital exporting countries want transparency while capital importing countries would like to use more obscure financial rules to gain a competitive advantage. This asymmetry between countries tends to move them towards partial cooperation. The results from my quantitative and qualitative analyses support these claims. Chapter three discusses the coordination model and how countries selectively apply international financial agreements to avoid their application to some sectors or firms. Furthermore, I examine the distributional consequences stemming from this process. My main argument in this chapter is that countries would like to maximize gains by applying international agreements to industries that will benefit while shielding those that will lose. This makes the international agreement less meaningful since its purpose it to cross-border comparability of firms. I find dependence on foreign creditors or international markets determines which sectors governments and private regulators choose to adhere to international standards. The results using my original dataset support these claims. Chapter four discusses the compliance model and explains the differing rates of compliance. There are three main compliance problems: (1) political independence of private regulators, (2) financial independence of private regulators, and (3) the disconnect between private bodies and government bodies in terms of their understanding of what can be accomplished when agreeing to IFRS. I use a combination of case studies and quantitative analysis to demonstrate how these issues impact compliance of international financial agreements. I conclude with a discussion on how these lens can be used together and how anticipated international compliance shapes both cooperation and coordination. Furthermore, I give a summary of how this project fits in the context of other analyses of the political problems plaguing IFRS and similar international regulatory agreements

Forgeries and public collections

Large public collections, however prestigious, inevitably have some forgeries in their storerooms (and occasionally on display) and, although this aspect may seem reprehensible in a publicly funded collection, it is almost inevitable, given the means by which collections are built up by museums. All collectors are vulnerable to forgers who customise their products to tempt the buyer with something that will fill an important gap in their collection, and museums are just as likely to fall for this as private collectors. Forgeries may also enter museum collections as gifts. Museums not infrequently receive bequests from generous patrons, sometimes comprising large numbers of objects, and amongst them a forgery may be included, unrecognised, and may remain unquestioned for many years before coming to the attention of a curator or visiting scholar. This paper presents some case studies of objects in the British Museum for which scientific analysis has demonstrated that either the materials or the technology used in their making are not compatible with their supposed date of manufacture.Les collections publiques, bien que prestigieuses, contiennent inévitablement quelques objets modernes dont certains sont exposés. Bien que cela puisse sembler critiquable dans le cas de collections publiques, ceci est inévitable au vu de la façon dont les collections des musées se sont formées au cours des décennies. Tout collectionneur d’art se trouve vulnérable face aux faussaires qui adaptent leurs « produits » pour correspondre à l’attente des acquéreurs ; les collectionneurs privés cherchant à combler une lacune importante dans leurs collections, tout comme les musées. Les faux ou les copies modernes, peuvent également être entrés dans les collections publiques par voie de donation. Il est en effet courant que les musées publics reçoivent des donations de personnalités importantes, collections qui sont parfois conséquentes et possédent un ou plusieurs faux. L’authenticité de ces objets ne sera pas questionnée, parfois pendant plusieurs années, jusqu’au moment où, par chance, dans le cadre d’un projet de recherche spécifique, ils soient proprement analysés par des méthodes scientifiques. Cet article présente quelques cas d’études d’objets appartenant à la collection du British Museum, pour lesquels l’étude scientifique a pu prouver que les techniques de fabrications utilisées ne pouvaient pas être compatibles avec leurs dates de fabrication supposées

O ENSINO DOS ESPORTES COLETIVOS NO ENSINO FUNDAMENTAL: FUTSAL E VOLEIBOL

Esta pesquisa tem como objetivo verificar o processo de ensino dos esportes coletivos – futsal e voleibol, utilizando como metodologia de ensino a abordagem crítico-emancipatória. Esta se apresenta como uma pesquisa qualitativa do tipo pesquisa-ação, utilizando como instrumentos de coleta de dados os relatórios das intervenções, estes sendo realizados durante as aulas da disciplina Estágio Supervisionado: Pesquisa da Prática Pedagógica do sexto período do curso de Licenciatura em Educação Física. Participaram do estudo aproximadamente 41 escolares com idade entre 12 a 14 anos. Os alunos cursavam a sétima série do Ensino Fundamental no período matutino, do Colégio de Aplicação da UNIVALI (CAU), localizado em Itajaí / SC – Brasil. A razão que levou o pesquisador a realizar o estudo surgiu de reflexões feitas sobre a prática dos esportes futsal e voleibol durante a época de discente e observações feitas em meio acadêmico, a partir de estudos realizados na disciplina Pedagogia do Esporte. A análise dos resultados se delimita as reflexões das intervenções, ou seja, da prática pedagógica a partir dos dados coletados. Por fim, se recomenda a realização de outras pesquisas relacionadas, que possam dispor de mais tempo para estudos principalmente empíricos e desta forma, que possam abranger mais modalidades de esportes coletivos, tratando da pedagogia no ensino dos esportes