DSpace Collection:http://hdl.handle.net/10174/17582024-03-29T12:15:09Z2024-03-29T12:15:09ZStrategies to reduce supra-optimal temperatures during field and containerized production of highbush blueberry in warm climatesMachado, RuiBryla, DavidCorreia, Manuelahttp://hdl.handle.net/10174/301152021-09-08T08:19:18Z2021-08-30T23:00:00ZTitle: Strategies to reduce supra-optimal temperatures during field and containerized production of highbush blueberry in warm climates
Authors: Machado, Rui; Bryla, David; Correia, Manuela
Abstract: The roots of highbush blueberry are sensitive to high temperatures and tend to grow poorly in
warm soils or warm soilless media. Three experiments were conducted to evaluate strategies for
reducing temperatures in the root zone in Évora, Portugal, where soil can reach temperatures >
45 °C. The first experiment was conducted in a small planting of ‘Ozarkblue’ blueberry.
Treatments included bare soil, a 10-cm-deep layer of aged pine bark mulch, and black, green,
and white geotextile landscape fabric. Bark mulch and green landscape fabric resulted in the
lowest mid-day soil temperatures among the treatments, which improved canopy development
and survival of the plants during establishment. White geotextile fabric also reduced soil
temperature but resulted in a considerable amount of weed growth under the fabric. The
second experiment was likewise conducted on ‘Ozarkblue’, but, in this case, the plants were
grown in 40-L pots filled with a soilless mix of three parts peat, two parts pine bark, and one part
humus, by volume. Treatments included black pots and black pots covered with white geotextile
landscape fabric. After a year, canopy volume of the plants was greater in black pots than in
white pots; however, yield was not affected by pot color. The third experiment was conducted
in a 2-year-old planting of ‘Legacy’ blueberry. Treatments included no shade and 60% green
shade netting. The netting had no effect on soil temperature in the root zone as a result of the
fact that 1) the canopy of plants intercepted the majority of the radiation at midday and 2)
frequent irrigation mitigated changes in soil temperature. On the basis of these results, bark
mulch and green landscape fabric appear to be the best options for reducing temperatures in
the root zone of blueberry in warm climates.2021-08-30T23:00:00ZAkerman ao Sul de tudo: Ensaio sobre a ‘objectiva indirecta livre’ como imagem lateralMartins, Joséhttp://hdl.handle.net/10174/281012020-09-01T11:08:53Z2017-05-10T23:00:00ZTitle: Akerman ao Sul de tudo: Ensaio sobre a ‘objectiva indirecta livre’ como imagem lateral
Authors: Martins, José
Abstract: Em Sud – cuja actualidade política não cessa de crescer na história americana –, Akerman inventa um dispositivo intermedial inédito: uma sinergia câmara/automóvel que potencia o encaixe cinematográfico clássico desses dois aparelhos de mediação tecnológica da experiência, os quais, por um trabalho efectuado sobre o eixo temporal do plano, por assim dizer desaparecem agora um no outro para darem lugar à pura imagem, para além de qualquer radicação perceptivo-motora ou fenomenológica. Essa imobilização da imagem na imagem, ou em si própria, pode assumir a modalidade fixa – o tripé –, ou a modalidade cursiva – o automóvel –: em momento algum, porém, a imagem-imóvel (parada, ou em deslocação) cede às coisas. Tal plano-imagem permanece literal (o insuportável político da violência não é latente, imaginável ou metafórico, mas virtualmente imanente ao cristal deste presente e ‘desse’ passado, indiscerníveis) e enfaticamente lateral: a sua superfície cola-se à superfície paralela do mundo (o automóvel nunca mira em frente) num único plano de imanência, sem a menor percepção perpendicular (nem frontal) da câmara, como olho ou janela, sobre a profundidade das coisas. Se uma câmara, kino-olho, pode co-responder a personagens ou entes como ‘[perspectivação] subjectiva indirecta livre’ (Pasolini), uma imagem espelha um mundo (‘Sud’) imanentemente, numa ‘objectiva indirecta livre’.2017-05-10T23:00:00ZMétricas: Quantos e Quais - quando o número conta, quando o que conta não é o númerodos Santos, Nunohttp://hdl.handle.net/10174/47012012-01-31T02:29:34Z2011-05-31T23:00:00ZTitle: Métricas: Quantos e Quais - quando o número conta, quando o que conta não é o número
Authors: dos Santos, Nuno
Abstract: O autor apresenta uma reflexão sobre os problemas inerentes a todos os processos de medição e categorização, sejam quantitativos sejam qualitativos.2011-05-31T23:00:00ZThe development of the Organizational Cooperation Questionnaire (QCO) for portuguese public local administration sectordos Santos, NunoCardoso, LeonorFigueiredo, Cláudiahttp://hdl.handle.net/10174/46902012-01-31T02:14:54Z2011-04-30T23:00:00ZTitle: The development of the Organizational Cooperation Questionnaire (QCO) for portuguese public local administration sector
Authors: dos Santos, Nuno; Cardoso, Leonor; Figueiredo, Cláudia
Abstract: Cooperation is a key concept for working teams. It is also a widely used expression in our organizational management and in the enterprises regulation documents. Developing, sharing, transferring are all important processes for organizational working which need several individuals cooperating together. However is this cooperation really happening in our organizations? During the present investigation we have developed the Organizational Cooperation Questionnaire (QCO) with the intention to measure several aspects well established in the cooperation literature. The aim was to provide an instrument with good psychometric qualities, to scientific community and organizational managers, starting from the public sector administration. The QCO was applied to 1354 employees of random sample from 81 public local administrations in Portugal. The results from Exploratory Factorial Analysis (EFA) show a structure composed by three factors, named cooperation for working team purpose, cooperation based in norms and cooperation for citizenship purpose. The characterization of the cooperation in the public local administration sector shows medium to low levels of this construct.2011-04-30T23:00:00Z