Some boundary effects in quantum field theory

We have constructed a quantum field theory in a finite box, with periodic boundary conditions, using the hypothesis that particles living in a finite box are created and/or annihilated by the creation and/or annihilation operators, respectively, of a quantum harmonic oscillator on a circle. An expression for the effective coupling constant is obtained showing explicitly its dependence on the dimension of the box.Comment: 12 pages, Late

The Institutionalization of Genocidal Leadership: Pol Pot and a Cambodian Dystopia

© 2015 University of Phoenix. Misleadership is defined as leadership process involving a complex interplay of leader, follower, and situational elements, inscribing a vicious circle of intensifying dysfunctional action. It is tempting to see misleadership as the result of the madness of one leader. It is also misleading. Leadership research has been insufficiently attentive to misleadership and, in particular, to the misleadership factors intervening in genocidal processes. Discussed in the current article are the antecedents and the rule of the Khmer Rouge regime in Cambodia in the 1970s as an extreme case of misleadership. Lessons from the Polpotist dystopia are derived and reflections on possible contra-strategies are presented. In particular, it is suggested that it is necessary to distinguish measures for social change that are admissible and positive, from negative utopian visions that are negative, inadmissible, and facilitative of evil leadership

Analgesic interpatient variability of remifentanil assessed through pupillary dilation reflex

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An institutional palimpsest? The case of Cambodia’s political order, 1970 and beyond

© 2015 Taylor & Francis. How do continuity and change coexist and coevolve? How does continuity enable change and change reinforce continuity? These are central questions in organizational and political research, as organizational and institutional systems benefit from the presence of both reproduction and transformation. However, the relation between the processes of change and continuity still raises significant questions. To contribute to this discussion, we analyse the coexistence of deep institutional continuity and radical political change in the second half of twentieth-century Cambodia. Over a two-decade period, Cambodia was ruled by radically different political systems of organization: a traditional monarchy with feudal characteristics, a failing republic, a totalitarian communist regime, and a Vietnamese protectorate, before being governed by the UN and finally becoming a constitutional monarchy. We use an historical approach to study how a succession of radical changes may in reality signal deep lines of continuity

Pupillary pain index correlates with postoperative pain scores in neurosurgical patients

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Caracterização morfológica do fruto, da semente e do desenvolmento da plântula de Blepharocalyx salicifolius (H. B. K.) Berg. e Myrceugenia gertii Landrum - Myrtaceae.

O objetivo neste trabalho foi caracterizar morfologicamente os frutos, as sementes e o desenvolvimento da plântula de Blepharocalyx salicifolius e Myrceugenia gertii. Para descrever os frutos e sementes foram utilizadas 100 unidades e para a descrição do desenvolvimento da plântula foram colocadas para germinar 100 sementes em substrato papel toalha, à temperatura de 25 ºC e 50 sementes em substrato vermiculita. Os frutos de B. salicifolius e M. gertii são carnosos e indeiscentes do tipo bacóide. As sementes de B. salicifolius possuem forma de espiral, coloração castanha semitransparente, não possuem endosperma e o embrião é do tipo pimentóide. As sementes de M. gertii são ovaladas, de coloração castanha semitransparente, comprimidas lateralmente, o endosperma é mucilaginoso e o embrião é do tipo mircióide. A germinação de ambas é epígea fanerocotiledonar

Germinação, morfologia e sanidade de sementes de Blepharocalyx salicifolius (Kunth) Berg e Myrceugenia gertii Landrum -Mmyrtaceae.

EVINCI. Resumo 045

Influência da luminosidade e da coloração do fruto na germinação de sementes de Blepharocalyx salicifolius.

Resumo

Plantas uliginosas e aquaticas do Pantanal arenoso.

Com o objetivo de apoiar projetos de pesquisa sobre plantas forrageiras e componentes bioticos de habitats (jacare, peixes), iniciou-se em 1984 o levantamento de plantas aquaticas e uliginosas de lugares umidos no leque aluvial arenoso do rio Taquari, que abrange Nhecolandia e Paiaguas no Pantanal. A Nhecolandia caracteriza-se pelas lagoas (= "baias"), e Paiaguas, pelas vazantes, ou drenagem abertas. Ambas as sub-regioes tem campos estacionalmente palustres com plantas uliginosas e aquaticas. Algumas comunidades como "pirizal", "caetezal", "taboal", "camalotal", etc, tem nomes populares em funcao das plantas dominantes. No total foram listadas 157 especies, de 108 generos e 54 familias. As familias mais numerosas sao gramineae (37 especies) e Cyperaceae (19), seguidas de Leguminosae (10), Scrophulariceae (7), Eriocaulaceae (6), Alismataceae (5), Lentibulariaceae (5), Onagraceae (5) e Polygalaceae (5).bitstream/item/41130/1/PA06.pd