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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
211

Actions of Selective Estrogenic Drugs Implanted Into the Medial Amygdala on Male Rat Mating Behavior

Dunigan, Anna I 04 April 2012 (has links)
Estrogen stimulation of the medial amygdala (MEA) of the brain promotes male rat mating behavior. However, selective stimulation of either of the estrogen receptor subtypes found in the MEA (ERα or ERβ) does not support mating behavior. We tested the hypothesis that dual stimulation of ERα and ERβ is required to activate estrogen-dependant neural circuits in the MEA responsible for mating by local treatment of MEA with a combination of selective estrogenic agonists: propyl pyrazole triol (PPT, an ERα agonist ) and diarylpropionitrile (DPN, an ERβ agonist) administered to castrated, DHT maintained male rats. Estradiol (E2) or cholesterol (Chol) MEA implants served as positive and negative controls respectively. The animals receiving a mixture of PPT and DPN into the MEA displayed higher levels of mating behavior than the Chol treated animals but lower levels of mating behavior than the E2 treated animals.
212

Sociala och mediala orsaker påverkar utvecklingen av Anorexia Nervosa bland unga kvinnor : En litteraturstudie / Social and media reasons to the development of Anorexia Nervosa among young women : A literature review

Andersson, Erica, Andersson, Sandra January 2012 (has links)
BAKGRUND: Psykisk ohälsa bland unga kvinnor är ett folkhälsoproblem. Anorexia nervosa kategoriseras in som en psykisk sjukdom. Anorexia nervosa drabbar främst unga kvinnor, vilket exempelvis kan bero på tidigare händelser i livet som gett upphov till psykisk obalans i deras vardag. SYFTE: Syftet med studien var att undersöka vilka sociokulturella orsaker som bidrar till utvecklingen av Anorexia nervosa bland flickor och unga kvinnor i åldrarna 12-25 år. METOD: En literaturstudie utfördes, som baseras på 21 olika vetenskapliga artiklar. Databaserna som användes var pubmed och psycinfo. Temaanalys användes och artiklarna kategoriserades in i huvudteman och underteman. RESULTAT: Resultatet i studien delades in i två huvudkategorier, med två underkategorier vardera. Sociala orsaker till uppkomsten av Anorexia nervosa: skola och ungdomskultur, samt bristande familjerelationer. Mediala orsaker till uppkomsten av Anorexia nervosa: exponering av unga kvinnors idealkroppar och negativ inspiration på internet. Olika orsaker bidrar till utvecklingen av Anorexia nervosa. Sociokulturella orsaker, mediala orsaker, familjära orsaker och kulturella orsaker samspelar och bidrar tillsammans till en utveckling av sjukdomen. IMPLIKATION: Exempelvis kan man studera de olika orsakerna på en mer specifik nivå och studera varje enskild orsak för sig. Studien kan också användas som en form av inspiration som stärker betydelsen av att hälsofrämjande åtgärder för psykisk ohälsa sätts i fokus. / BACKGROUND: Mental illness among young woman is a public health problem. Anorexia nervosa is categorized as a mental illness. Young woman affected by Anorexia nervosa, wich for example may be due to earlier life events that gave rise to mental imbalance in their everyday lives. OBJECTIVE: The aim of this study was to describe the socio-cultural reasons that contribute to the development of Anorexia nervosa among girls and young women 12-25 years. METHOD: The study is a literature review, based on 21 differens aricles. The method has been to look up earlier research in the area through various databases on the internet. Databases that have been used is pubmed and psycinfo. The articles were divided into different themes, with main category and subcategory. RESULTS: The results of the study was divided into two main categories each with two subcategories. Social causes for the occurrence of Anorexia nervosa: School and youth culture and the second was lack of family relationship. Media reasons in the emergence of Anorexia nervosa: Media image of the feminine ideal and negative inspiration on the internet. Socio-cultural reasons, medial reasons, family reasons, and cultural reasons. IMPLICATION: For example, one can study the various reason in a more specific level, and studying each factors separately. The study can also be used as a form of inspiration that reinforces the importance of health promotion activities for mental illness is the focus.
213

Delineating the Neural Circuitry Underlying Crossmodal Object Recognition in Rats

Reid, James 15 September 2011 (has links)
Previous research has indicated that the perirhinal cortex (PRh) and posterior parietal cortex (PPC) functionally interact to mediate crossmodal object representations in rats; however, it remains to be seen whether other cortical regions contribute to this cognitive function. The prefrontal cortex (PFC) has been widely implicated in crossmodal tasks and might underlie either a unified multimodal or amodal representation or comparison mechanism that allows for integration of object information across sensory modalities. The hippocampus (HPC) is also a strong candidate, with extensive polymodal inputs, and has been implicated in some aspects of object recognition. A series of lesion based experiments assessed the roles of HPC, PFC and PFC sub regions [medial prefrontal (mPFC) and orbitofrontal cortex (OFC)], revealing functional dissociations between these brain regions using two versions of crossmodal object recognition: 1. spontaneous crossmodal matching (CMM), which requires rats to compare between a stored tactile object representation and visually-presented objects to discriminate the novel and familiar stimuli; and 2. crossmodal object association (CMA), in which simultaneous pre-exposure to the tactile and visual elements of an object enhances CMM performance across long retention delays. Notably, while inclusive PFC lesions impaired both CMM and CMA tasks, selective OFC lesions disrupted only CMM, whereas selective mPFC damage did not impair performance on either task. Furthermore, there was no impact of HPC lesions on either CMM or CMA tasks. Thus, the PFC and the OFC play a selective role in crossmodal object recognition but the exact contributions and interactions of the regions will require further research to elucidate. / PDF Document / Natural Sciences and Engineering Research Council of Canada (NSERC)
214

Genetic Dissection of the Neural Circuitry Underlying Memory Stability in Drosophila: A Dissertation

Keene, Alex Carl 22 August 2006 (has links)
Understanding how memory is formed requires looking beyond the genes involved to the neural circuitry and temporal aspects of memory. In this dissertation I have focused my investigation on Dorsal Paired Medial (DPM) neurons, two modulatory neurons essential for memory in Drosophila. DPM neurons highly express the amnesiac (amn) gene, which encodes for a putative pre-pro-neuropeptide. amn function in DPM neurons is required for memory. Here I provide evidence that DPM neurons are cholinergic and that acetylcholine (ACh) and AMN act as co-transmitters essential for DPM function. In order to investigate the temporal requirements of DPM output I blocked transmitter release during discrete intervals in the memory process using shibirets1 and tested flies for shock and sugar-reinforced memory. These experiments demonstrated that stable memory requires persistent transmitter release from DPM neurons. Furthermore these results suggest AMN and DPM neurons act as general stabilizers of mushroom body dependent memory. To further investigate the neural circuitry underlying DPM function I disrupted DPM projections onto the mushroom body lobes by ectopically expressing DScam17-2::GFP in DPM neurons. Flies with DPM neurons that predominantly project to the mushroom body α´/β´ lobes exhibit normal memory, and blocking transmitter release from the mushroom body prime lobes neurons themselves abolishes memory indicating DPM neuron-mushroom body α´/β´ neuron interaction that are critical for memory. Taken together, the experimental evidence presented here are used to provide a rudimentary model of the neural circuitry involved in memory stability, where DPM neurons form a recurrent feedback loop with the mushroom body α´/β´ lobe neurons and act to stabilize odorspecific conditioned memories at Kenyon cell synapses.
215

A epêntese medial em PB e na aquisição de inglês como LE : uma análise morfofonológica

Schneider, André January 2009 (has links)
No presente estudo, fazemos uma análise quantitativa do fenômeno fonológico de epêntese vocálica medial, que é atestado na fala do português brasileiro (PB) (por exemplo, [i] em mag[i]ma) e do inglês aprendido por brasileiros (por exemplo, [i] em mag[i]net). As amostras de fala utilizadas para essa análise foram obtidas a partir da gravação de frases lidas por 16 porto-alegrenses falantes de inglês como língua estrangeira. Partimos do pressuposto de que a produção de epêntese na fala do inglês seja resultado da transferência linguística que ocorre do PB para a interlíngua dos aprendizes. COLLISCHONN (2002) levantou a suspeita de que o número de ocorrências de epêntese após prefixos como sub- seria maior do que o número de ocorrências de epêntese em encontros consonantais localizados no interior de vocábulos que não são prefixados. Na tentativa de averiguar essa suspeita, incluímos em nossa análise a verificação do papel do contexto morfológico na aplicação da epêntese. Partimos da hipótese de que os prefixos que podem favorecer a epêntese em PB e em inglês têm diferentes graus de transparência, sendo que os prefixos mais transparentes parecem estar mais relacionados à aplicação de epêntese, em razão de uma possível independência fonológica que eles possam ter. Constatamos que, em PB, os prefixos sob- e sub- são os mais transparentes, ao passo que, em inglês, arch-, out, post- e sub- são os mais transparentes. Nos resultados das análises estatísticas que realizamos com os dados de cada língua, vimos, no entanto, que o papel morfológico só tem maior relevância estatística nos dados do PB, nos quais foi possível confirmar nossa hipótese de que a epêntese seria mais frequente após sob- e sub-. Os resultados das análises estatísticas nos permitiram ainda constatar que todos os grupos de fatores selecionados nas rodadas com dados do inglês (‘tipo de consoante perdida’, ‘vozeamento da consoante perdida’, ‘acento’ e ‘informante’) haviam sido igualmente selecionados nas rodadas com dados do PB. A partir dessa constatação, realizamos algumas comparações entre os resultados obtidos para os grupos de fatores selecionados nas duas línguas, o que nos permitiu verificar que, para os dados de nosso estudo, existe uma relação estreita entre os fatores muito/pouco relacionados à epêntese em português e os fatores muito/pouco relacionados à epêntese em inglês. Isso parece confirmar a atuação da transferência linguística que assumimos existir entre a L1 e a interlíngua. / In this research, we aim at analyzing the recurrence of the epenthetic vowel found in word-medial clusters both in Brazilian Portuguese (BP) (e.g. [i] in mag[i]ma) and in English learnt by Brazilians (e.g. [i] in mag[i]net). The samples of oral production that we analyzed consist of a set of recorded sentences that 16 Brazilian learners of English (from Porto Alegre/RS) were asked to read. We assume that epenthesis found in English is a consequence of language transfer from BP to the learners’ interlanguage. COLLISCHONN (2002) argued that the frequency of epenthesis found after prefixes such as sub- seemed to be higher than the frequency of epenthesis found in medial-word clusters of nonprefixed words. In order to investigate such statement, we included in our study the analysis of the role of morphological aspects in the production of epenthetic vowels. Firstly, we assumed that the prefixes that may favor vowel epenthesis in BP and in English are given different gradients of transparency, and we also assumed that the more a prefix was transparent, the more likely it would motivate epenthesis, since transparency may mean some phonological independence for these prefixes. We confirmed through data collection that sob- and sub- are the most transparent prefixes in BP, and that arch-, out-, post- and sub- are the most transparent ones in English. The statistical results for the analysis of oral production however showed us that only BP prefixes sob- and sub- were significant to vowel epenthesis. These statistical results also showed us that all the groups of factors considered to be significant to vowel epenthesis in English (‘type of stray consonant’, ‘voicing of the stray consonant’, ‘stress’, and ‘participant’) were significant in vowel epenthesis in BP, too. Such results motivated us to compare the frequency of epenthesis in the two languages for each of the factors comprised by these four groups considered significant to vowel epenthesis. The results of this comparison showed us that there is a straightforward relation between the factors that motivate vowel epenthesis in BP and the factors that motivate vowel epenthesis in English. Such results seem to confirm that language transfer is operative between L1 and the interlanguage.
216

A epêntese medial em PB e na aquisição de inglês como LE : uma análise morfofonológica

Schneider, André January 2009 (has links)
No presente estudo, fazemos uma análise quantitativa do fenômeno fonológico de epêntese vocálica medial, que é atestado na fala do português brasileiro (PB) (por exemplo, [i] em mag[i]ma) e do inglês aprendido por brasileiros (por exemplo, [i] em mag[i]net). As amostras de fala utilizadas para essa análise foram obtidas a partir da gravação de frases lidas por 16 porto-alegrenses falantes de inglês como língua estrangeira. Partimos do pressuposto de que a produção de epêntese na fala do inglês seja resultado da transferência linguística que ocorre do PB para a interlíngua dos aprendizes. COLLISCHONN (2002) levantou a suspeita de que o número de ocorrências de epêntese após prefixos como sub- seria maior do que o número de ocorrências de epêntese em encontros consonantais localizados no interior de vocábulos que não são prefixados. Na tentativa de averiguar essa suspeita, incluímos em nossa análise a verificação do papel do contexto morfológico na aplicação da epêntese. Partimos da hipótese de que os prefixos que podem favorecer a epêntese em PB e em inglês têm diferentes graus de transparência, sendo que os prefixos mais transparentes parecem estar mais relacionados à aplicação de epêntese, em razão de uma possível independência fonológica que eles possam ter. Constatamos que, em PB, os prefixos sob- e sub- são os mais transparentes, ao passo que, em inglês, arch-, out, post- e sub- são os mais transparentes. Nos resultados das análises estatísticas que realizamos com os dados de cada língua, vimos, no entanto, que o papel morfológico só tem maior relevância estatística nos dados do PB, nos quais foi possível confirmar nossa hipótese de que a epêntese seria mais frequente após sob- e sub-. Os resultados das análises estatísticas nos permitiram ainda constatar que todos os grupos de fatores selecionados nas rodadas com dados do inglês (‘tipo de consoante perdida’, ‘vozeamento da consoante perdida’, ‘acento’ e ‘informante’) haviam sido igualmente selecionados nas rodadas com dados do PB. A partir dessa constatação, realizamos algumas comparações entre os resultados obtidos para os grupos de fatores selecionados nas duas línguas, o que nos permitiu verificar que, para os dados de nosso estudo, existe uma relação estreita entre os fatores muito/pouco relacionados à epêntese em português e os fatores muito/pouco relacionados à epêntese em inglês. Isso parece confirmar a atuação da transferência linguística que assumimos existir entre a L1 e a interlíngua. / In this research, we aim at analyzing the recurrence of the epenthetic vowel found in word-medial clusters both in Brazilian Portuguese (BP) (e.g. [i] in mag[i]ma) and in English learnt by Brazilians (e.g. [i] in mag[i]net). The samples of oral production that we analyzed consist of a set of recorded sentences that 16 Brazilian learners of English (from Porto Alegre/RS) were asked to read. We assume that epenthesis found in English is a consequence of language transfer from BP to the learners’ interlanguage. COLLISCHONN (2002) argued that the frequency of epenthesis found after prefixes such as sub- seemed to be higher than the frequency of epenthesis found in medial-word clusters of nonprefixed words. In order to investigate such statement, we included in our study the analysis of the role of morphological aspects in the production of epenthetic vowels. Firstly, we assumed that the prefixes that may favor vowel epenthesis in BP and in English are given different gradients of transparency, and we also assumed that the more a prefix was transparent, the more likely it would motivate epenthesis, since transparency may mean some phonological independence for these prefixes. We confirmed through data collection that sob- and sub- are the most transparent prefixes in BP, and that arch-, out-, post- and sub- are the most transparent ones in English. The statistical results for the analysis of oral production however showed us that only BP prefixes sob- and sub- were significant to vowel epenthesis. These statistical results also showed us that all the groups of factors considered to be significant to vowel epenthesis in English (‘type of stray consonant’, ‘voicing of the stray consonant’, ‘stress’, and ‘participant’) were significant in vowel epenthesis in BP, too. Such results motivated us to compare the frequency of epenthesis in the two languages for each of the factors comprised by these four groups considered significant to vowel epenthesis. The results of this comparison showed us that there is a straightforward relation between the factors that motivate vowel epenthesis in BP and the factors that motivate vowel epenthesis in English. Such results seem to confirm that language transfer is operative between L1 and the interlanguage.
217

A constru??o medial no portugu?s do Brasil: usos no padr?o reclama??o digital

Melo, N?dia Maria Silveira Costa de 27 March 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-08T22:32:10Z No. of bitstreams: 1 NadiaMariaSilveiraCostaDeMelo_TESE.pdf: 1542179 bytes, checksum: be052cfe0b06ab470accca1b8275b1ce (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-11T20:02:44Z (GMT) No. of bitstreams: 1 NadiaMariaSilveiraCostaDeMelo_TESE.pdf: 1542179 bytes, checksum: be052cfe0b06ab470accca1b8275b1ce (MD5) / Made available in DSpace on 2016-04-11T20:02:44Z (GMT). No. of bitstreams: 1 NadiaMariaSilveiraCostaDeMelo_TESE.pdf: 1542179 bytes, checksum: be052cfe0b06ab470accca1b8275b1ce (MD5) Previous issue date: 2015-03-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Esta tese examina a constru??o medial do portugu?s do Brasil (PB). Trata-se de uma constru??o que descreve um evento causativo, em que um participante sujeito n?o-humano ? afetado por uma a??o que n?o emana dele. Interessa-nos investigar essa constru??o a partir de suas fun??es sem?ntico-cognitivas e discursivopragm?ticas, suas caracter?sticas espec?ficas, motiva??es e contexto discursivo em que seu uso ? recorrente. Para tanto, buscamos responder ?s seguintes quest?es: qual a configura??o estrutural protot?pica da constru??o medial (CM) no Portugu?s do Brasil? Quais s?o suas fun??es discursivas espec?ficas? Qual ? o grau de transitividade da CM com base nas propriedades propostas por Hopper e Thompson (1980)? Partimos do pressuposto de que a constru??o medial possui estrutura pr?pria que particulariza sua dimens?o significativa, garantindo um certo distanciamento entre o respons?vel pelo evento e a entidade afetada. A fundamenta??o te?rica prov?m da Lingu?stica Funcional Centrada no Uso (FURTADO DA CUNHA; BISPO; SILVA, 2013). ? uma pesquisa de natureza qualitativo-interpretativista que tem como prioridade a an?lise de ocorr?ncias oriundas de textos produzidos por usu?rios da l?ngua portuguesa do Brasil em situa??o efetiva de comunica??o. Os dados emp?ricos analisados prov?m de textos eletr?nicos dispon?veis no s?tio www.reclameaqui.com.br. Os resultados revelaram a exist?ncia de diferentes configura??es em portugu?s para a constru??o medial, sendo a protot?pica a formada por SN+V. Do ponto de vista morfossint?tico e sem?ntico, a constru??o expressa um sujeito afetado por uma a??o que n?o parte dele. Quanto ao aspecto pragm?tico, a constru??o expressa um evento que parece ter como prop?sito enfatizar o argumento afetado e ignorar, intencionalmente ou n?o, o agente ou o causativo, por ser irrelevante para o falante/ouvinte na situa??o de comunica??o. / This thesis examines the medial construction of the Portuguese of Brazil (PB). It is a construction which describes a causative event in which a non-human subject participant is affected by an action that does not originate from itself. Thus, we are interested in investigating this type of construction, its specific characteristics, motivations and discursive context from its semantic- cognitive and discoursive - pragmatic functions. The research questions are: what is the prototypical structural configuration of the medial construction (MC) in the Portuguese of Brazil? What are its specific discoursive functions? What is the degree of MC transitivity based on the properties proposed by Hopper and Thompson (1980)? We assume that the medial construction has its own structure which particularizes its significant dimension, thus ensuring a certain distance between the one in charge of the event and the affected entity. The theoretical and methodological assumptions is founded on Usage-based Functional Linguistics (FURTADO DA CUNHA; BISPO; SILVA, 2013). It is a research of qualitative- interpretative nature that has prioritized the analysis of occurrences arising from texts produced by users of the Brazilian Portuguese language in effective communicative situation. The database for this study is electronic texts available on the website www.reclameaqui.com.br. The results revealed the existence of different configurations of the medial construction in the Brazilian Portuguese, having as prototypical the one formed by SN + V. From the morphosyntactic and semantic point of view, the construction expresses a subject affected by an action that does not part from itself. As for the pragmatic aspect, the construction expresses an event that seems to have the purpose to emphasize the affected argument and to ignore, intentionally or not, the agent or the causative, since it is irrelevant to the speaker/ listener in the contextual situation.
218

Jag säger att jag är synsk och att jag tror på änglar : En studie av mediala kvinnor. / I say that I am spiritual and believe in angels : A study of spiritual women.

Wahlqvist, Malin January 2003 (has links)
Syftet med studien är att undersöka fyra stycken kvinnor som är medlemmar i samma mediala grupp. Uppsatsen ämnar undersöka hur de ser på sig själva och sin medialitet utifrån gruppen och samhället de lever i genom deras livsberättelse. Det är en kvalitativ undersökning som genom livshistorieintervjuer samt deltagande observationer studerar kvinnornas berättelser och deras medverkan i gruppen. Slutsatsen visade en ambivalent syn på att de var annorlunda och visade en rädsla och försiktighet mot samhället utanför gruppen som de lever i till vardags.
219

Efeito do paricalcitol e do calcitriol sobre a doença cardiovascular em camundongos uninefrectomizados ApoE -/- / Effect of paricalcitol and calcitriol on cardiovascular disease in uninephrectomized ApoE -/- mice

Luis Eduardo Becker 16 January 2008 (has links)
O estudo investigou a influência do tratamento de 10 semanas com paricalcitol (0,1µg/kg 5x/semana) e calcitriol (0,03µg/kg 5x/semana) em modelo de aterosclerose espontânea utilizando camundongos ApoE -/- sham e uninefrectomizados (UNX). Resultados: a densidade capilar por comprimento no tecido cardíaco foi significativamente mais baixa nos animais UNX Controle quando comparados aos shams, o que não ocorreu nos animais UNX tratados com paricalcitol e calcitriol. Nas aortas, a relação parede/lúmen foi significativamente menor no grupo Sham Controle quando comparada à dos grupos UNX Controle e UNX Calcitriol, sendo que nesses últimos, foram evidenciadas calcificações vasculares acompanhadas por células positivas para Runx-2 (cbfa-1). Além disso, foi evidenciada uma menor expressão de TGFß nas aortas dos animais do grupo UNX Paricalcitol em relação aos grupos UNX Controle e UNX Calcitriol. Conclusões: Ambos os tratamentos preveniram alterações na capilarização cardíaca induzidas pela UNX. O tratamento com calcitriol na dose empregada induziu significativas calcificações vasculares, o que não ocorreu com o paricalcitol. / The study investigated the influence of a 10-week treatment with Paricalcitol (0.1µg/kg, 5x/week) or Calcitriol (0.03µg/kg, 5x/week) on cardiovascular disease in spontaneously atherosclerotic ApoE -/- mice submitted to uninephrectomy (UNX). Results: capillary length density of the heart was significantly lower in UNX Control, but not in UNX Paricalcitol and UNX Calcitriol animals, when compared to shams. In the aortas, a significantly lower wall/lumen ratio was observed in the Sham Control group when compared to UNX Control and UNX Calcitriol groups. In the latter, vascular calcifications accompanied by a significant presence of Runx-2 (cbfa-1) positive cells was observed. TGFß aorta expression was significantly higher in UNX Control and UNX Calciriol groups when compared to UNX Paricalcitol. Conclusions: Both treatments were able to prevent the reduction in heart capillarization induced by the UNX model. Treatment with Calcitriol at the employed dose and duration, though, induced significant vascular calcifications.
220

Skola och privatliv - två skilda världar? : En kvalitativ studie om fem grundskoleelevers medievanor och bildundervisningens multimodalitet. / School and personal life – two different worlds?

Mases Calson, Louise January 2017 (has links)
I denna uppsats har fem grundskoleelever i årskurs 3-6 intervjuats om deras uppfattningar av bildundervisningens relevans i relation till deras erfarenheter av visuell kultur. Gemensamt för eleverna var att de på olika vis använde sig av sociala forum och var vana mediala orienterare. Bildämnet har under tid förändrats och läroplanen ställer nu även krav på multimodal undervisning med digitala verktyg. Resultatet avslöjar dock att undervisningen inte motsvarat samhällets utveckling vilket lämnat eleverna att önska en mer digitaliserad undervisning. Insamlandet av empiri har skett genom kvalitativa intervjuer där jag löpande fört anteckningar för hand och därefter bearbetat materialet genom ett digitalt skrivprogram. Empirin har analyserats utifrån det multimodala perspektivet, ett relativt nytt perspektiv vilket bygger på kommunikation genom olika teckensystem och medier.

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