239 research outputs found

    Growing Motivation and Learning for the Middle School Student through Reassessment Practices

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    The purpose of this study was to explore the best reassessment practices, in a middle school setting, that would nurture a learning and motivating classroom environment. The research questions sought to discover the best reassessment practices in middle school and how do these practices increase a middle school student’s ability and motivation to re-learn. Forty-eight middle school students in the 7th and 8th grade were surveyed to assess the effectiveness of each reassessment practice. Furthermore, interviews with four students were conducted for a more in-depth exploration of student learning and motivation. Statistical significance was found in the quantitative data indicating accountability to be the best reassessment practice for student learning and motivation. When students practiced taking responsibility and monitoring their own progress, learning and motivation increased. The qualitative data highlighted the importance of teachers offering reassessment practices so that students know their next steps of learning

    Starch synthesis in potato tubers

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    How to increase sustainability in the Finnish wine supply chain? : Insights from a country of origin based greenhouse gas emissions analysis

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    As wine supply chains become increasingly globalized, sustainability issues take on ever greater importance. This is the first study to analyse the environmental sustainability aspect of greenhouse gas (GHG) emissions from a global wine supply chain perspective, covering just over 90% of Finland's wine imports. Lacking substantial domestic production capacity, virtually all wine consumed in Finland is imported. Finland is comparable to its Nordic neighbours, Sweden and Norway, in this respect. The Life Cycle Assessment (LCA) methodology was combined with sensitivity and scenario analyses to investigate GHG emissions implications from prospective policy changes. Our results spotlight differences related to wine production in the eight main wine producing countries for the Finnish market (Australia, Chile, France, Germany, Italy, Spain, South Africa, and the United States), related logistics, and all packaging types for wine used in Finland (glass bottle, Bag-in-Box, PET bottle, beverage carton, and pouch). We found an average value of 1.23 kg CO2e for 0.75 L wine consumed in Finland, ranging from 0.59 kg CO2e for French wine in a bag-in-box packaging to 1.92 kg CO2e for Australian wine in a glass bottle. After identifying the main GHG emission hotspots in the wine supply chain, our scenario analyses highlight the effects of reducing glass bottle weight, moving away from glass packaging toward bag-inbox, increasing bulk wine export volumes to Finland, and following the European Commission's Energy 2020 strategy which targets increasing energy efficiency by 20 percent.Peer reviewe

    Prescrição para Compensação de Crédito Tributário decorrente de Decisão Judicial Transitada em Julgado

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    TCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Jurídicas. Direito.A famosa “tese do século” propulsionou uma busca intensa pela compensação e trouxe à tona questões controversas acerca da prescrição, devido à vacância legislativa. A Receita Federal, o Conselho Administrativo Fiscal e o Judiciário possuem entendimentos divergentes em relação aos prazos, de modo que pairam dúvidas sobre os direitos dos contribuintes. A fim de elucidar o tema, o presente trabalho traz um breve histórico de temas correlatos e organiza os procedimentos compensatórios para explorar as nuances dos marcos temporais de compensações oriundas de decisões transitadas em julgado. Discute a possibilidade de suspensão, interrupção e antecipação em decisões com efeitos vinculantes, dotadas de eficácia erga omnes, através de jurisprudência, consulta Cosit, instruções normativas e doutrina

    Greenhouse gas emissions and mitigation options for German wine production

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    In the light of a dire need to reduce greenhouse gas emissions (GHG) from food value chains, this paper analyses GHG emissions from wine production based on primary data from 5 wineries, one wine cellar and 9 grape producers in Germany and explores main emission sources based on their contributions to variance. Considering system boundaries from cradle to gate we found a 90% confidence interval for results between 0.753 and 1.069 kg CO2e per bottle of wine. Main contributors to variance were bottle weight (31%), electricity usage (18%), heat (11%), yield (−9%), and diesel use in vineyards (9%). Looking at production process phases, 19% of emissions resulted from the production of wine grapes, while 81% were attributable to the winery phase, mainly to the packaging materials (57%). Exploring the mitigation potential of a reduction in bottle weight, reuse of glass bottles, increase in packaging volume and renewable energies, we found that the reuse of glass bottles deserves close attention from wine producers, consumers, and policy makers who strive for an effective decarbonization of the wine value chain. The mitigation potential of the reuse of an average bottle exceeds the mitigation potential from a reduction in bottle weight by more than threefold. A combination of the replacement of grid electricity by renewable energies, bottle weight reduction and reuse can curb GHG emissions per bottle of wine by 47%.Peer reviewe

    The graph bottleneck identity

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    A matrix S=(sij)Rn×nS=(s_{ij})\in{\mathbb R}^{n\times n} is said to determine a \emph{transitional measure} for a digraph GG on nn vertices if for all i,j,k{1,.˙.,n},i,j,k\in\{1,\...,n\}, the \emph{transition inequality} sijsjksiksjjs_{ij} s_{jk}\le s_{ik} s_{jj} holds and reduces to the equality (called the \emph{graph bottleneck identity}) if and only if every path in GG from ii to kk contains jj. We show that every positive transitional measure produces a distance by means of a logarithmic transformation. Moreover, the resulting distance d(,)d(\cdot,\cdot) is \emph{graph-geodetic}, that is, d(i,j)+d(j,k)=d(i,k)d(i,j)+d(j,k)=d(i,k) holds if and only if every path in GG connecting ii and kk contains jj. Five types of matrices that determine transitional measures for a digraph are considered, namely, the matrices of path weights, connection reliabilities, route weights, and the weights of in-forests and out-forests. The results obtained have undirected counterparts. In [P. Chebotarev, A class of graph-geodetic distances generalizing the shortest-path and the resistance distances, Discrete Appl. Math., URL http://dx.doi.org/10.1016/j.dam.2010.11.017] the present approach is used to fill the gap between the shortest path distance and the resistance distance.Comment: 12 pages, 18 references. Advances in Applied Mathematic

    Exploring sustainability potentials in vineyards through LCA? Evidence from farming practices in South Africa

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    Following the urgency to curb environmental impacts across all sectors globally, this is the first life cycle assessment of different wine grape farming practices suitable for commercial conventional production in South Africa, aiming at better understanding the potentials to reduce adverse effects on the environment and on human health.Purpose Following the urgency to curb environmental impacts across all sectors globally, this is the first life cycle assessment of different wine grape farming practices suitable for commercial conventional production in South Africa, aiming at better understanding the potentials to reduce adverse effects on the environment and on human health. Methods An attributional life cycle assessment was conducted on eight different scenarios that reduce the inputs of herbicides and insecticides compared against a business as usual (BAU) scenario. We assess several impact categories based on ReCiPe, namely global warming potential, terrestrial acidification, freshwater eutrophication, terrestrial toxicity, freshwater toxicity, marine toxicity, human carcinogenic toxicity and human non-carcinogenic toxicity, human health and ecosystems. A water footprint assessment based on the AWARE method accounts for potential impacts within the watershed. Results and discussion Results show that in our impact assessment, more sustainable farming practices do not always outperform the BAU scenario, which relies on synthetic fertiliser and agrochemicals. As a main trend, most of the impact categories were dominated by energy requirements of wine grape production in an irrigated vineyard, namely the usage of electricity for irrigation pumps and diesel for agricultural machinery. The most favourable scenario across the impact categories provided a low diesel usage, strongly reduced herbicides and the absence of insecticides as it applied cover crops and an integrated pest management. Pesticides and heavy metals contained in agrochemicals are the main contributors to emissions to soil that affected the toxicity categories and impose a risk on human health, which is particularly relevant for the manual labour-intensive South African wine sector. However, we suggest that impacts of agrochemicals on human health and the environment are undervalued in the assessment. The 70% reduction of toxic agrochemicals such as Glyphosate and Paraquat and the 100% reduction of Chlorpyriphos in vineyards hardly affected the model results for human and ecotoxicity. Our concerns are magnified by the fact that manual labour plays a substantial role in South African vineyards, increasing the exposure of humans to these toxic chemicals at their workplace. Conclusions A more sustainable wine grape production is possible when shifting to integrated grape production practices that reduce the inputs of agrochemicals. Further, improved water and related electricity management through drip irrigation, deficit irrigation and photovoltaic-powered irrigation is recommendable, relieving stress on local water bodies, enhancing drought-preparedness planning and curbing CO2 emissions embodied in products.Peer reviewe

    The Walk Distances in Graphs

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    The walk distances in graphs are defined as the result of appropriate transformations of the k=0(tA)k\sum_{k=0}^\infty(tA)^k proximity measures, where AA is the weighted adjacency matrix of a graph and tt is a sufficiently small positive parameter. The walk distances are graph-geodetic; moreover, they converge to the shortest path distance and to the so-called long walk distance as the parameter tt approaches its limiting values. We also show that the logarithmic forest distances which are known to generalize the resistance distance and the shortest path distance are a subclass of walk distances. On the other hand, the long walk distance is equal to the resistance distance in a transformed graph.Comment: Accepted for publication in Discrete Applied Mathematics. 26 pages, 3 figure

    Acceptance of Anxiety through Art Therapy: A Case Report Exploring How Anthroposophic Art Therapy Addresses Emotion Regulation and Executive Functioning

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    Anxiety is a major problem for many individuals, causing impairment in daily life. Art therapy is often deployed and although positive results are communicated in clinical practice, its effectiveness and working mechanisms have hardly been studied. Therefore, it is important to systematically describe the intervention process and to detect the working mechanisms to be able to evaluate them. Narrative case studies help to understand the intervention in more depth. A typical case file was selected for case reporting according to scientific (CARE & CARE-AAT) guidelines, with the aim to explore the therapeutic elements that contributed to the reduction of anxiety. The report describes the intervention process of a 54-year-old female, suffering from anxiety since childhood and diagnosed with panic disorder, agoraphobia, claustrophobia and hypochondria. After 14 sessions of anthroposophic art therapy, reduction of anxiety was shown, as well as improvements of emotion regulation and executive functioning. The client indicated that she became more tolerant and accepting towards her anxiety. She noted a softened attitude towards herself and her complaints, even one year after art therapy. The course of treatment suggests that aspects of emotion regulation and executive functioning were addressed through implicit learning processes in different art therapy assignments.Development Psychopathology in context: clinical setting
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