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

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.info:eu-repo/semantics/acceptedVersio

Carabid (Coleoptera) community changes following prescribed burning and the potential use of carabids as indicators species to evaluate the effect of fire management in Mediterranean regions

Separata do Vol. 14, n.º da Revista Silva Lusitana.Pesquisável também em http://www.scielo.oces.mctes.pt/pdf/slu/v14n1/v14n1a07.pdfThis study investigates the effects of prescribed burning on ground beetle (Coleoptera: Carabidae) communities in two different habitats, a pine forest stand in Northern Portugal and a shrubland in a central region that were fire treated in spring of 1998. These two ecosystems were considerably different in floristically as well as structurally. Pitfall trapping was performed for two years in the pine stand and three years in the shrubland. Species of dryer open habitats dominated after fire in the shrubland site while the pine stand habitat showed a more or less constant carabid community structure for all treatments. Some Carabid taxa such as species/subspecies like Chrysocarabus lateralis, Petrophilus brevipennis sousai, Macrothorax rugosus celtiberus and Steropus globosus ebenus may be considered as indicators for fire managed areas in Mediterranean ecosystems

Barragem subterranea: um estudo de caso.

O armazenamento de água em aquíferos artificiais, por meio de barragens subterrâneas, pode ser uma alternativa para suprir as necessidades de água no meio rural, principalmente para consumo vegetal. Em Alexandria - RN, em uma barragem subterrânea com área de 2,0 ha, verificou-se um aumento significativo na produção das culturas de milho, feijão e arroz, permitindo ao produtor comercializar o excedente da produção e aumentar a renda familiar

Caracterização e avaliação da potencialidade dos solos do município de Santa Izabel do Pará - Estado do Pará.

bitstream/item/57194/1/Doc100.pdfAnexo mapas: Mapa de solos do Município de Santa Izabel do Pará - Pará; Mapa de vegetação e uso das terras do Município de Santa Izabel - Pará

Supressão de brusone por promotores de crescimento, bióticos e abióticos, em arroz de terras altas.

Com o objetivo de testar a eficiência dos promotores de crescimento na supressão da brusone, foram instalados 2 ensaios (GO e PA), em condições de campo, em sistema de plantio direto, com delineamento de blocos ao acaso, com 4 repetições

Absolute Hyperglycemia versus Stress Hyperglycemia Ratio for the Prognosis of Hospitalized Patients with COVID-19 in the First Months of the Pandemic: A Retrospective Study

Diabetes is a risk factor for greater severity of coronavirus disease 2019 (COVID-19). The stress hyperglycemia ratio (SHR) is an independent predictor of critical illness, and it is reported to have a stronger association than absolute hyperglycemia. The aim of this study was to assess the relationship of absolute hyperglycemia and SHR with the severity of COVID-19, since there are no studies investigating SHR in patients with COVID-19. We conducted a retrospective observational study on hospitalized patients with COVID-19 in the first months of the pandemic, regarding absolute hyperglycemia, SHR, and severity outcomes. Of the 374 patients, 28.1% had a previous diagnosis of type 2 diabetes. Absolute hyperglycemia (64.8% versus 22.7%; p < 0.01) and SHR [1.1 (IQR 0.9-1.3) versus 1.0 (IQR 0.9-1.2); p < 0.001] showed a statistically significant association with previous diabetes. Absolute hyperglycemia showed a significant association with clinical severity of COVID-19 (79.0% versus 62.7%; p < 0.001), need for oxygen therapy (74.8% versus 54.4%; p < 0.001), invasive mechanical ventilation (28.6% versus 11.6%; p < 0.001), and intensive care unit (30.3% versus 14.9%; p = 0.002), but not with mortality; by contrast, there was no statistically significant association between SHR and all these parameters. Our results are in agreement with the literature regarding the impact of absolute hyperglycemia on COVID-19 severity outcomes, while SHR was not a significant marker. We therefore suggest that SHR should not be evaluated in all patients admitted in the hospital for COVID-19, and we encourage the standard measures at admission of blood glucose and HbA1c levels.info:eu-repo/semantics/publishedVersio

Exact solution for the energy density inside a one-dimensional non-static cavity with an arbitrary initial field state

We study the exact solution for the energy density of a real massless scalar field in a two-dimensional spacetime, inside a non-static cavity with an arbitrary initial field state, taking into account the Neumann and Dirichlet boundary conditions. This work generalizes the exact solution proposed by Cole and Schieve in the context of the Dirichlet boundary condition and vacuum as the initial state. We investigate diagonal states, examining the vacuum and thermal field as particular cases. We also study non-diagonal initial field states, taking as examples the coherent and Schrodinger cat states.Comment: 10 pages, 8 figure

Pyrene-p-tert-butylcalixarenes inclusion complexes formation: a surface photochemistry study

Diffuse reflectance and luminescence techniques were used to study the photophysics and photochemistry of pyrene within p-tert-butylcalix[n]arenes with n = 4, 6, and 8, and to study their ability to form inclusion complexes in heterogeneous media. Evidences for inclusion complex formation were found for the three hosts under study. Ground state diffuse reflectance results have shown the formation of ground state dimers of pyrene inside the cavity of calix[ 6] arene and calix[ 8] arene, with this feature much more evident for calix[ 6] arene. For calix[ 4] arene, only a monomer fits inside the cavity and the presence of pyrene microcrystals outside the cavity was detected. A luminescence lifetime distribution analysis was performed, revealing the presence of prompt emissions from the pyrene microcrystals outside the cavity in the case of calix[ 4] arene and from the constrained dimers inside the cavities of calix[ 6] arene and calix[ 8] arene. Transient absorption results have shown the presence of pyrene radical cation and also of trapped electrons for the three hosts under study. The formation of the phenoxyl radical of the calixarene following the laser pulsed excitation of pyrene at 355 nm is increased for calix[ 6] arene and calix[ 8] arene. This feature is particularly relevant for calix[ 6] arene, suggesting a very favourable situation for the hydrogen atom abstraction to occur. The analysis of the degradation products revealed the presence of hydroxypyrene as a major photodegradation product for the three hosts. Dihydro-hydroxypyrene was also formed in the case of calix[ 6] arene and calix[ 8] arene. The formation of the calixarene's phenoxyl radical and subsequent hydrogen abstraction is consistent with the formation of dihydro-dihydroxypyrene

Alternativa tecnológica para aumentar a disponibilidade de agua no Semi-Árido.

Armazenar agua em aquiferos artificiais, por meio de barragens subterraneas, pode ser uma alternativa capaz de suprir as necessidades de agua do meio rural, principalmente para consumo vegetal. Na construcao dessas barragens pode-se utilizar material disponivel na propria regiao, como argila, alvenaria, concreto ou lona plastica. Este trabalho objetivou analisar a viabilidade tecnico-economica de uma barragem subterranea construida no municipio de Alexandria, RN, utilizando-se lona plastica de polietileno, confirmando-se que, mesmo na estacao seca, o conteudo de agua disponivel no solo foi suficiente para suprir as necessidades de agua das culturas, possibilitando a exploracao agricola durante todo o ano. Nestas condicoes, verificou-se aumento significativo na producao das culturas de milho, feijao e arroz, quando comparada com os anos anteriores, em condicoes de solo e clima semelhantes. O aumento da produtividade permitiu ao agricultor comercializar o excedente da producao, aumentar sua renda familiar e dispor de restos culturais para complementar a alimentacao do rebanho