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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

Evaluation of the olfactory capabilities of western flower thrips towards volatiles from present and putative ancestral hosts

Abdullah, Zayed Saud January 2013 (has links)
No description available.
212

Magnitude Processing in Developmental Dyscalculia : A Heterogeneous Learning Disability with Different Cognitive Profiles

Skagerlund, Kenny January 2016 (has links)
Developmental dyscalculia (DD) is a learning disability that is characterized by severe difficulties with acquiring age-appropriate mathematical skills that cannot be attributed to insufficient education, language skills, or motivation. The prevalence rate is estimated at 3-6%, meaning that a substantial portion of the population struggles to learn mathematics to such a large degree that it affects overall well-being and academic prospects. However, our understanding of the etiology of DD is incomplete and there are competing hypotheses regarding the characteristics of DD and its underlying causal factors. The purpose of the current thesis is to contribute to our understanding of DD from the perspective of cognitive psychology and cognitive neuroscience. To this end, we identify children with DD to identify the cognitive determinants of DD that hamper their ability to learn basic mathematics. It is believed that human beings are endowed with an innate ability to represent numerosities, an ability phylogenetically shared with other species. We investigate whether the purported innate number system plays a role in children with DD insofar as  failures in this system may undermine the acquisition of symbolic representations of number. Although some researchers believe DD is a monolithic learning disability that is genetic and neurobiological in origin, the empirical support for various hypotheses suggests that DD may be shaped by heterogeneous characteristics and underlying causes. The present thesis, and the studies presented therein, provides support for the notion that DD is indeed heterogeneous. We identify at least two subtypes of DD that are characterized by specific deficits in number processing, and one subtype that could more aptly be labelled as a mathematical learning disability, the causal factors of which are likely limited to deficits in non-numerical abilities. In addition, we locate candidate neurocognitive correlates that may be dysfunctional in DD. / Dyskalkyli är en specifik inlärningssvårighet som karaktäriseras av stora svårigheter med att tillgodogöra sig matematikkunskaper som inte kan härledas till bristande undervisningsmöjligheter, språkfärdigheter, eller motivation. Prevalensen av dyskalkyli uppskattas till 3-6%, vilket innebär att en ansenlig andel av populationen har sådana besvär att lära sig matematik att det påverkar deras allmänna välbefinnande och akademiska möjligheter. Förståelsen för dyskalkyli är emellertid knapphändig, men ett flertal konkurrerande hypoteser har föreslagits avseende dess karaktäristika och kausala faktorer. Syftet med denna avhandling är att öka vår förståelse av dyskalkyli utifrån ett kognitionspsykologiskt perspektiv och utifrån kognitiv neurovetenskap. Följaktligen identifierade vi skolbarn med specifika och stora matematiksvårigheter för att sedermera undersöka vilka kognitiva faktorer som underminerar deras förmåga att förvärva grundläggande matematikfärdigheter. Rådande uppfattning är att människan är utrustad med en medfödd förmåga att uppfatta och representera antal, vilket är en förmåga som vi fylogenetiskt delar med andra arter. Vi undersöker huruvida detta medfödda antalsuppfattningssystem är involverat vid utvecklandet av dyskalkyli hos barn, där ett dysfunktionellt antalsuppfattningssystem kan underminera förmågan att tillgodogöra sig symboliska representationer av antal. Gängse uppfattning gör gällande att dyskalkyli är en enhetlig och homogen inlärningssvårighet som genetiskt och neurobiologiskt betingad. Dock har ett flertal hypoteser angående orsaken till dyskalkyli fått empiriskt stöd, vilket möjliggör tolkningen att dyskalkyli snarare är en heterogen inlärningssvårighet med olika kausala faktorer och egenskaper. Föreliggande avhandling ger stöd för denna senare tolkning. Vi identifierar åtminstone två  subtyper av dyskalkyli, som vardera karaktäriseras av specifika svårigheter med numeriska färdigheter, samt en subtyp som mer korrekt bör benämnas som matematiska inlärningssvårigheter där bidragande faktorer sannolikt kan härledas till icke-numeriska förmågor. Vidare så identifierar vi potentiella neurokognitiva korrelat som är dysfunktionella vid dyskalkyli.
213

Airlines experiential marketing: gaining and retaining customers : Case studies of British Airways, SAS, Air France, Easy jet and KLM

COUASME, Mathilde, GURGEY, Julie January 2016 (has links)
Title: Airlines experiential marketing: gaining and retaining customers Research Question: How do airlines use the experiential marketing to gain and retain consumers? Supervisor: Venilton Reinert Course: Strategic Marketing with Independent Project Keywords: Airlines, experiential marketing, experience, loyalty, sense, emotions, feelings Purpose: The aim of this research is to understand how airlines’ users can be acquired and kept thanks to experiential marketing. This study allows analysing the news consumers’ expectations and how companies adapt their strategies to meet customers’ needs thanks to experiential marketing. All airlines mentioned in this study are European. Methodology: A qualitative research has been used for this paper. The authors of the thesis proceed choosing five European airlines: British Airways, Air France, KLM Royal Dutch Airlines, Easy Jet and Scandinavian Airlines System. The case studies have been used to describe, thanks to a number of Internet tools, how companies use the experience and feelings in marketing to urge consumers to purchase and be loyal. Then, authors used Schmitt theory to collect data. Finally, a number of frameworks have been used to analyse data. Conclusion: Airlines want to carry the customer to think and act through the experience. A successful experiential marketing occurs when the customer behaves thanks to his emotions. So, airlines’ marketers create competition, challenge, and game to remind customers. The interaction with public and internet users is necessary used in each experiential marketing event by airlines to promote the event and permeated to the customer share its experience, meet people and identify him in a group. If customers experience unique and perfectly experiential event, they will remember the service, and consequently the brand in the long-term as remarkable. In this way, the brand gain or retain customers.
214

The Future of Narcissus: The Relationship of Narcissism to Expectations of the Future as Mediated by Anxiety, Depression, Impulsivity, and Sense of Control

Brown, Genna L. 01 January 2015 (has links)
The last few decades have seen a growing body of research on narcissism, however few studies have examined the relationship between subclinical narcissism and future orientation. The proposed study will examine how grandiose and vulnerable types of narcissism influence future orientation, and whether anxiety, depression, impulsivity and sense of control play mediating roles in this relationship. It is also hypothesized that anxiety will play a mediating role between future orientation and vulnerable narcissism, but not between grandiose narcissism and future orientation. Finally, it is hypothesized that grandiose and vulnerable narcissism will be correlated within individuals. Structural Equation Modeling (SEM) will be used to test the hypotheses, and the a priori model is expected to have a good fit to the data. This study will further our understanding about how narcissists view their futures, and whether this is influenced by mediating factors.
215

A comparison of full swing and partial swing SRAM read topologies

Truong, Bao Gia 2009 August 1900 (has links)
This paper outlines design considerations and implementation details of full swing and of partial swing SRAM arrays. Comparisons between the two methods based on performance, power, and noise rejection are then presented. Finally, a decision matrix will be provided that selects the better topology based on varying design constraints. / text
216

CONSIDERING THE POWER OF CONTEXT: RACISM, SEXISM, AND BELOGING IN THE VICARIOUS TRAUMATIZATION OF COUNSELORS

Hahn, Katharine J. 01 January 2010 (has links)
Recent concerns have arisen about the effects on counselors of working with trauma survivors. Vicarious traumatization may be a normal developmental process of adapting to client trauma material and may ultimately result in vicarious posttraumatic growth, or positive changes arising from vicarious trauma. Most studies have focused on individual variables or clinician coping strategies that predict vicarious traumatization. Taking a feminist approach to vicarious traumatization, this study examined the role of workplace context variables, such as sense of belonging in the workplace and support for vicarious trauma at work, on counselor vicarious traumatization and vicarious posttraumatic growth. Stratified random sampling was used to recruit counselors from domestic violence and rape crisis centers, and recruitment messages were sent to all psychology internship and postdoctoral sites in the United States which were accredited by the American Psychological Association. Surveys were completed by 234 counselors. Counselors reported sub-clinical levels of vicarious trauma symptoms (intrusions, avoidance, and hyperarousal resulting from work with trauma survivors). Results of hierarchical regression analyses indicated that amount and intensity of exposure to client trauma material positively predicted vicarious trauma symptoms, and sense of belonging in the workplace negatively predicted vicarious trauma symptoms. Intensity of exposure, work setting, and support for vicarious trauma at work predicted vicarious posttraumatic growth, so that counselors exposed to more graphic details of client trauma, those working in domestic violence or rape crisis centers, and counselors with more support for vicarious trauma at work reported more vicarious posttraumatic growth. The relation between amount of exposure and vicarious posttraumatic growth was moderated by intensity of exposure and by sense of belonging in the workplace. Counselors with low sense of belonging at work reported less vicarious posttraumatic growth when amount of exposure was high, whereas counselors with high sense of belonging reported more vicarious posttraumatic growth with high exposure. Results suggest that counselors’ reactions to client trauma material are normal rather than pathological, are largely due to exposure to client trauma, and can be affected by workplace context factors, especially sense of belonging in the workplace and support for vicarious trauma at work.
217

An examination of the relationship between attachment and loss : the role of meaning-making

Douglas, Ryan Patrick 25 September 2014 (has links)
This dissertation examined the relationship between attachment insecurity and complicated grief by testing a path model of variables that were hypothesized to mediate this relationship. Three meaning-making variables were tested as potential mediators: benefit-finding, sense-making, and positive reappraisal. First, a series of principal components analyses were performed to determine the factor structure of these meaning-making variables. After these constructs were identified, a series of hierarchical regression analyses were conducted to determine the unique contribution of each of the primary variables in predicting either complicated grief or one of the meaning-making variables. As hypothesized, some of the attachment and meaning-making variables were highly associated with complicated grief. Attachment insecurity variables were also associated with some of the meaning-making variables suggesting that attachment may have some influence on how individuals use meaning-making strategies in the midst of a loss. These variables were then entered into a path analysis that accounted for other relevant risk factors. It was found that, contrary to the main hypothesis, the meaning-making variables did not appear to mediate the relationship between attachment insecurity and complicated grief. Multiple regression was used to determine the relative impact of meaning-making and attachment variables on complicated grief because these variables have not been previously included in one statistical model. The results suggested that both meaning-making and attachment insecurity variables can play an important role as risk factors for complicated grief and that these relationships are still present after accounting for the closeness that an individual reported towards the deceased. It was concluded that both sets of variables, attachment and meaning-making, should be included in models of the development of complicated grief and that both may have clinical implications in terms of how to approach counseling for individuals struggling with complicated grief. More research on this topic is needed to look at similar research questions within specific populations. It was also suggested that in the future, researchers need to find better ways to measure meaning-making constructs because the current findings suggest that meaning-making may be even more multifaceted than has been suggested in previous literature. / text
218

Vad har känsla av sammanhang och upplevt socialt stöd för samband med individens sinnestämning

Neijbert, Greger, Isaksson, Elin January 2007 (has links)
<p>The aim of this study was to examine the relations between sense of coherence (SOC), perceived social support and mood, the study also included gender and civil status in the analysis. In the analysis mood was the dependent variable. The study included 81 respondents, all students from Växjö university, who answered a survey with three parts: SOC 13, Mood Adjective Checklist (MACL), and an own constructed instrument that measured perceived social support. The result showed that those with a high SOC tended to have a greater mood. High scores on perceived social support also were related to a greater mood. No significant interaction effects was found between SOC and perceived social support. In the whole sample SOC was the strongest predictor for MACL. Women reported higher social support from friends than men, but this variable had no effect on women’s MACL. Among men the perceived social support from friends was the strongest predictor for MACL.</p>
219

Reshaping an Enduring Sense of Self: The Process of Recovery from a First Episode of Schizophrenia

Romano, Donna M. 10 July 2009 (has links)
Although many advances in the treatment of schizophrenia have been made over the past decade, little is known about the process of recovery from a first episode of schizophrenia (FES). To date, the study of recovery in the field of mental health has focused on long-term mental illness. This in depth qualitative study drew upon Charmaz’s (1990) constructivist grounded theory methodology to address the following questions: How do individuals who have experienced a FES describe their process of recovery? How does an identified individual (e.g. friend, family member, teacher, or clinician) describe their role during the participant’s process of recovery, and their perception of the recovery process? Ten primary participants (who self-identified as recovering from a FES) had two interviews; in addition, there was a one-time interview with a secondary participant, for a total of 30 interviews. Data collection sources included participant semi-structured interviews, participant selected personal objects that symbolized their recovery, and clinical records. The results provide a substantive theory of the process of recovery from a FES. The emergent process of recovery model for these participants is comprised of the following phases: ‘Lives prior to the illness’, ‘Lives interrupted: Encountering the illness’, ‘Engaging in services and supports’, ‘Re-engaging in life’, ‘Envisioning the future’; and the core category, ‘Re-shaping an enduring sense of self,’ that occurred through all phases. A prominent distinctive feature of this model is that participants’ enduring sense of self were reshaped versus reconstructed throughout their recovery. The emergent model of recovery from a FES is unique, and as such, provides implications for clinical care, future research, and policy development specifically for these young people and their families.
220

Experiencing a sense of calling : the influence of meaningful work on teachers' work attitude / Marietjie Willemse

Willemse, Marietjie January 2013 (has links)
In the current South African context, negative work attitude of teachers has become a phenomenon to be reckoned with as it has a detrimental effect on the education system. Although research on this phenomenon is still scarce, a growing interest in work attitude and its different underlying constructs is obvious from the increase of work attitude research. It is now time to investigate ways to improve work attitude, one of which could be to invest in meaningful work. The aim of this study is to expand on the understanding of the relationship between experiencing a sense of calling and work attitude as well as to determine the influence of meaningful work on this relationship. Through this study the researcher proposed an adapted model of Steger, Pickering, Shin and Dik (2011) which will serve as an academic tool for future research. This model will also be applicable as a management tool to understand and deal with teachers’ negative work attitude. A quantitative, cross-sectional survey design was used. The analysis was based on data from a representative sample of teachers recruited from primary and secondary schools in the Fezile Dabi district (n = 270) formerly known as the Northern Free State School district. The following measuring instruments were administered: The Calling and Vocation Questionnaire (CVQ), The Work and Meaning Inventory (WAMI), The Work Preference Inventory (WPI) and The Career Decision Profile (CDP). The researcher used the analytic approach of structural equation modelling by means of the statistical program Mplus. The results revealed that a statistically significant relationship existed between the experience of a sense of calling and work attitude. Results also supported the hypothesis that meaningful work has an indirect effect on the relationship between the experience of a calling and work attitude. The findings of this study indicated that positive work attitude tends to be enhanced by the addition of meaningful work. The Department of Education will have to take ognisance of ways to create meaningful work if they wish to succeed in educational transformation, as meaningful work has an indirect effect on the relationship between the experience of a calling and work attitude of teachers. Future studies should include longitudinal studies to validate the proposed adapted model and to identify more predictors of positive work attitude. / MA (Industrial Psychology), North-West University, Vaal Triangle Campus, 2013

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