Symmetry reduction, integrability and reconstruction in k-symplectic field theory

We investigate the reduction process of a k-symplectic field theory whose Lagrangian is invariant under a symmetry group. We give explicit coordinate expressions of the resulting reduced partial differential equations, the so-called Lagrange-Poincare field equations. We discuss two issues about reconstructing a solution from a given solution of the reduced equations. The first one is an interpretation of the integrability conditions, in terms of the curvatures of some connections. The second includes the introduction of the concept of a k-connection to provide a reconstruction method. We show that an invariant Lagrangian, under suitable regularity conditions, defines a `mechanical' k-connection.Comment: 37 page

Analisis Minat Membaca Permulaan dengan Cerita Bergambar di Kelas I Sekolah Dasar

Interest in reading the beginning of elementary school students is very important to support the achievement of a lesson. Based on the researchers tried to assess in an objective study. The purpose of this study to describe the interest in reading beginning with a picture story in the first grade SDN Purwantoro 6 Malang. This research method using descriptive method with qualitative approach. The subjects were students of class I, amounting to 3 students. The results of this study concluded that students\u27 interest in reading beginning with picture stories are very helpful in the learning process. Response and enthusiasm of the students look good, the students enjoy learning, so that students gain meaningful learning experiences.Minat membaca permulaan siswa sekolah dasar sangat penting untuk menunjang tercapainya suatu pembelajaran. Berdasarkan hal tersebut peneliti mencoba untuk mengkaji dalam suatu tujuan penelitian. Tujuan penelitian ini untuk mendeskripsikan minat membaca permulaan dengan cerita bergambar di kelas I SDN Purwantoro 6 Kota Malang. Metode penelitian ini menggunakan metode deskriptifdengan pendekatan kualitatif. Subjek penelitian ini adalah siswa kelas I yang berjumlah 3 siswa. Hasil penelitian ini menyimpulkan bahwa minat membaca permulaan siswa dengan cerita bergambar sangat membantu dalam proses pembelajaran. Respon dan antusiasme siswa terlihat baik, siswa lebih senang dalam belajar, sehingga siswa memperoleh pengalaman belajar yang bermakna

Progress in cassava technology transfer in Uganda

This publication contains the full text of papers presented at a Workshop held in Masindi, Uganda, 9-12 January 1996, and sponsored by the Gatsby Charitable Foundation. During the Workshop the need became evident for additional statistics on the multiplication, distribution and uptake of improved varieties of cassava in the six districts where activities are supported by The Gatsby Charitable Foundation and also elsewhere. The results of a subsequent survey in selected sub-counties of each of the six Gatsby districts are also presented here, together with estimates of the amount of improved material that has been distributed and the area now grown. These latest figures (Appendix 1) represent the best available estimates and in some instances differ substantially from those compiled and presented in the earlier district reports

Farm-Level Adaptive Capacity to Climate Variability in Rice Production, Northern Uganda

Rice is Uganda’s second major cereal crop however; its productivity has been considerably low and stagnant between 1.3 to 2.4 tons per hectare over the last 15 years. One of the underlying factors of low productivity is the current growing conditions which are not optimal for production due to climate variability. Adaptation is therefore pivotal in countering climatic challenges in production. Empirical evidence however, point to limited adaptive ability of farmers. This paper assessed farm-level adaptive capacity and its contribution to rice yield enhancement in Northern Uganda. The study was conducted on a sample of 240 rice producers in northern Uganda during 2010 - 2014 growing seasons. Adaptation capacity was measured quantitatively using indicator of access, use, knowledge and consultation levels. The study results revealed that the average farm-level adaptive capacity was 0.64 which falls in the range of moderate adapters. The study drew the following conclusions: adaptive capacity regarding use of local coping strategies was high contrary to the conventional strategies such as improved variety and herbicide. The moderate to high adaptive capacity was due farmer’s ability to access and use coping strategies than knowledge and consultation on the strategies. There was a considerable difference in yield between the low and high adapters. In order to improved farmer adaptive capacity, there is need for: early weather information sharing on specific crops and locality, research on rice production technologies, validating, strengthening and out-scaling of relevant local coping strategies, improving adoption of conventional coping strategies and access to quality seeds. Keywords: Coping strategies, Adaptive capacity, Climate variability, Rice

Comparative Analysis of Multiplicative and Additive Noise Based Automated Regularizations in Non-Linear Diffusion Image Reconstruction

Multiplicative and additive noises are often introduced in image signals during the image acquisition process and result into degradation of image features. The work done by Perona and Malik in 1990 and its modified versions revolutionized the way through which noises or speckles are removed. The Perona-Malik model requires tuning of the regularization parameter to control and prevent staircase artifacts in restored images. The current manual tuning is a challenging and time consuming practice when a long queue of images is registered for processing. Attempt to automate the regularization parameter appeared in Perona-Malik model with self-adjusting shape-defining constant. Although both multiplicative and additive noise based automated regularizations were presented, the paper stayed silent on matters concerning the automation method that fits with speckle reduction. This paper therefore, presents a comparative analysis of additive and multiplicative noise based automated regularizations. Simulation results and paired samples T-tests reveal that the multiplicative noise based automation outperforms the additive noise based automation for small speckle variances. However, the two automation methods do not significantly differ when large speckle variances are assumed

Effects of Climate Variability on Technical Efficiency of Rice in Acholi and Lango Sub-regions, Uganda

Despites government positive policies towards rice sector development, its productivity has remained low throughout its main growing areas. Several detrimental conditions that are climatic, biological and household specific are attributed to low and stagnant yield. The objective of this paper was to determine effects of climate variability on technical efficiency of rice production in Acholi and Lango sub-regions. Analysis of Cob-Douglas stochastic production function on 211 households showed that rice producers are operating in stage three of production function with respect to some inputs, production function exhibit decreasing return to scale and mean technical efficiency was 51%. Rainfall and temperatures improved technical efficiency in production while credit and labour reduced technical efficiency. The study concluded the following: More room exists for output improvement through expansion of acreage, inefficiencies characterize rice production in the sub-regions, the current rainfall amount and mean temperatures are adequate for attainment of efficiency while credit and labour constraints pose a serious challenge to attainment of efficiency in rice production. The study recommended: Promote of rice production in the upland areas, introduction of new rice variety suitable for the agro-ecological conditions and increase access to formal credit facilities.Keywords: Rice, Climate variability, Household characteristics, Technical efficiency, Uganda

An Innovative Photovoltaic Luminescent Solar Concentrator Window: Energy and Environmental Aspects

Over the years, different types of smart windows have been tested and developed. In this study, an innovative prototype of a photovoltaic smart window, that integrates luminescent solar concentrators, was analysed. The device independently regulates the movement of the shading system and allows energy surplus, through the electricity generated by modules. Considering the peculiar structure (characterized by the presence of a light shelf) and the thermal characteristics of the device, the analyses focused on optical, thermal, and electrical performances, comparing them with those of a traditional window. The analysis followed an experimental approach that involved lighting and electrical monitoring studies in a real test room, to create validated models for conducting simulations in larger buildings. The results were expressed through the study of illuminance maps, electricity generation obtainable from the integrated photovoltaic technology and in terms of energy savings. Energy generation accounts for around 10 Wh/month, with up to 50% improvement from the perspective of energy use for heating and cooling. The technology proves effective in allowing efficient overall energy performances while generating enough energy to operate the smart window control systems

Lontarak pangissengeng daerah Sulawesi Selatan

Berkat adanya naskah kuno lontarak yang mengandung berbagai bahan keterangan tentang kehidupan sosial budaya masyarakat Sulawesi Selatan dan ditulis oleh leluhur pada abad yang lalu , maka aneka ragam idea, gagasan vi tal, sistem pengetahuan, moral, filsafat, keagamaan yang telah mengalami proses sejarah yang cukup lama, masih dapat dibaca dan dikaji

Life Cycle Assessment of Luminescent Solar Concentrators Integrated into a Smart Window

The main goal of this paper is to assess the life cycle environmental impacts of a multifunctional smart window luminescent solar concentrator (SW-LSC) prototype through the application of the Life Cycle Assessment methodology. To the authors' knowledge, this is one of the first studies on the topic. The analysis followed a cradle to gate approach, considering the assembly and maintenance phase as well as the end of life, examined separately through a recycling/landfill scenario. A comparison of the impacts of LSC modules with those of some building-integrated photovoltaic technologies was carried out. Results showed that the global warming potential (100 years) for SW-LSC was 5.91 x 10(3) kg CO2eq and the manufacturing phase had the greatest impact (about 96%). The recycling/landfill scenario results showed the possibility to reduce impacts by an average of 45%. A dominance analysis of SW-LSC components showed that the aluminum frame was the main hotspot (about 60% contribution), followed by the light-shelf (about 19%). Batteries and motors for the shading system were the biggest contributors in the abiotic depletion potential category (36% and 30%, respectively). An alternative scenario, which involved the use of 75% recycled aluminum for the window frame, highlighted the possibility to reduce environmental impacts from 3% to 46%. Finally, the comparison results showed that the LSC modules' impacts were on average 870% lower than that of various PV technologies when compared on the basis of m(2); on the contrary, LSC modules had the highest impacts in all categories (from 200% to 1900%) when compared with other PV technologies on the basis of 1 kWh of energy generated. The results could be used for the definition of eco-design strategies for the examined device, in order to support the scaling-up process and to put "greener" systems onto the market

Interferon-γ release assay in people infected with immunodeficiency virus

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