967 resultados para explicit categorization
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Samhällsdebatten om de nedslående resultaten som redovisats i PIRLS 2011 visar att läsförståelseundervisningen i Sverige inte ger de resultat som förväntas. Syftet med denna litteraturstudie var undersöka vilken betydelse faktatexters struktur har för läsförståelsen hos elever i årskurs 4-6. Inledningsvis redogörs för innehållet i skolans styrdokument som rör läsförståelse samt Skolverkets analyser av resultatmätningar. Dessutom redovisas Skolverkets rapporter och annan pedagogisk litteratur i frågan om vikten av att alla lärare undervisar i läsförståelse oavsett ämne. Metoden som använts är en systematisk litteraturstudie där sökmetoder och urval redovisas. Studiens resultat visar att elever som undervisats i olika texttypers strukturer inte bara förstår texten bättre, de får också bättre förutsättningar att producera egna texter i olika genrer. Vid användning av grafiska modeller som är anpassade till aktuell struktur ökar möjligheten till textförståelse och textproduktion ytterligare. En slutsats från studien är att förutsättningen för att elever ska utveckla sin läsförståelse är lärarens explicita läsförståelseundervisning i alla ämnen.
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Some 50% of the people in the world live in rural areas, often under harsh conditions and in poverty. The need for knowledge of how to improve living conditions is well documented. In response to this need, new knowledge of how to improve living conditions in rural areas and elsewhere is continuously being developed by researchers and practitioners around the world. People in rural areas, in particular, would certainly benefit from being able to share relevant knowledge with each other, as well as with stakeholders (e.g. researchers) and other organizations (e.g. NGOs). Central to knowledge management is the idea of knowledge sharing. This study is based on the assumption that knowledge management can support sustainable development in rural and remote regions. It aims to present a framework for knowledge management in sustainable rural development, and an inventory of existing frameworks for that. The study is interpretive, with interviews as the primary source for the inventory of stakeholders, knowledge categories and Information and Communications Technology (ICT) infrastructure. For the inventory of frameworks, a literature study was carried out. The result is a categorization of the stakeholders who act as producers and beneficiaries of explicit and indigenous development knowledge. Stakeholders are local government, local population, academia, NGOs, civil society and donor agencies. Furthermore, the study presents a categorization of the development knowledge produced by the stakeholders together with specifications for the existing ICT infrastructure. Rural development categories found are research, funding, agriculture, ICT, gender, institutional development, local infrastructure development, and marketing & enterprise. Finally, a compiled framework is presented, and it is based on ten existing frameworks for rural development that were found in the literature study, and the empirical findings of the Gilgit-Baltistan case. Our proposed framework is divided in four levels where level one consists of the identified stakeholders, level two consists of rural development categories, level three of the knowledge management system and level four of sustainable rural development based on the levels below. In the proposed framework we claim that the sustainability of rural development can be achieved through a knowledge society in which knowledge of the rural development process is shared among all relevant stakeholders.
Resumo:
Resultaten av de senaste PIRLS-undersökningarna visar att svenska elevers läsförståelse har försämrats under senare år. Enligt forskning bör undervisningen vara inriktad på lässtrategier för att elever ska utveckla läsförståelse. För att eleverna ska lära sig använda olika lässtrategier självständigt när de tolkar text och skapar mening behöver de undervisas explicit. Undervisningen bör vara strukturerad och varierad samtidigt som läraren stöttar eleverna och anpassar undervisningen efter deras individuella behov. Syftet med studien har varit att undersöka hur lärare i F–3 undervisar i läsförståelse och lässtrategier för att se vilka förtjänster och brister som finns. Studiens metod är kvalitativ och för att samla in material har fem halvstrukturerade intervjuer genomförts med fem verksamma lärare, fyra klasslärare och en specialpedagog, fördelade på fyra olika skolor. Resultaten visar att lärare använder sig av olika undervisningsmetoder när de undervisar i läsförståelse, såsom en läsande klass, think-aloud, cirkelmodellen och Chambers modell för boksamtal. Det som tycks genomsyra lärarnas undervisning i läsförståelse är kommunikation, vilket är nära sammankopplat med studiens teoretiska utgångspunkt, det sociokulturella perspektivet. Enligt lärarna samtalar de mycket med eleverna om texter, och de verkar försöka anpassa undervisningen efter elevernas individuella behov genom att välja texter som eleverna har förkunskaper i och om. När de undervisar explicit tycks lärarna diskutera olika lässtrategiers nyttoanvändning genom att samtala om hur och varför olika lässtrategier är lämpliga att använda i olika sammanhang. Enligt lärarna erbjuds eleverna undervisning i olika gruppkonstellationer såsom arbete i helklass, halvklass, mindre grupper, parvis och enskilt. Lärarna tycks vara tydliga i sin undervisning för att eleverna ska bli medvetna om i vilket syfte de ska läsa.
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This paper investigates the importance of the fiow of funds as an implicit incetive provided by investors to portfolio managers in a two-period relationship. We show that the fiow of funds is a powerful incentive in an asset management contract. We build a binomial moral hazard model to explain the main trade-ofIs in the relationship between fiow, fees and performance. The main assumption is that efIort depend" on the combination of implicit and explicit incentives while the probability distrioutioll function of returns depends on efIort. In the case of full commitment, the investor's relevant trade-ofI is to give up expected return in the second period vis-à-vis to induce efIort in the first período The more concerned the investor is with today's payoff. the more willing he will be to give up expected return in the following periods. That is. in the second period, the investor penalizes observed low returns by withdrawing resources from non-performing portfolio managers. Besides, he pays performance fee when the observed excess return is positive. When commitment is not a plausible hypothesis, we consider that the investor also learns some symmetríc and imperfect information about the ability of the manager to generate positive excess returno In this case, observed returns reveal ability as well as efIort choices exerted by the portfolio manager. We show that implicit incentives can explain the fiow-performance relationship and, conversely, endogenous expected return determines incentives provision and define their optimal leveIs. We provide a numerical solution in Matlab that characterize these results.
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Trabalho apresentado Numerical Solution of Differential and Differential-Algebraic Equations (NUMDIFF-14), Halle, 7-11 Sep 2015
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Background. Ductal carcinoma in situ (DCIS) of the breast has been diagnosed increasingly since the advent of mammography. However, the natural history of these lesions remains uncertain. Ductal carcinoma in situ of the breast does not represent a single entity but a heterogeneous group with histologic and clinical differences. The histologic subtype of DCIS seems to have an influence on its biologic behavior, but there are few studies correlating subtype with biologic markers.Methods. The authors studied a consecutive series of 40 cases of DCIS and after its histologic categorization verified its relationship with ploidy using image analysis and analyzing estrogen receptor (ER), progesterone receptor (PR), p53 and c-erbB-2 expression using immunohistochemistry.Results. The three groups proposed according to the grade of malignancy were correlated significantly with some of the additional parameters studied, including aneuploidy and c-erB-2 expression. Aneuploidy was detected in 77.5% of cases of DCIS mainly in high and intermediate grade subtypes (100% and 80% vs. 35.7% in low grade) whereas immunoreactivity for c-erbB-2 was detected in 45% of cases of DCIS mainly in the high grade group. Expression of ER and PR were observed frequently in this study (63.9% and 65.7% respectively), but without correlation with the histologic subtype of DCIS, although we found a somewhat significant association between high grade DCIS and lack of ER. p53 protein expression was detected in 36.8% of these cases, but no relationship between this expression and histologic subtype or grading of DCIS was found.Conclusions. These results provide further evidence for the morphologic and biologic heterogeneity of DCIS. Besides histologic classification and nuclear grading, some biologic markers such as aneuploidy and c-erbB-2 expression constitute additional criteria of high grade of malignancy.