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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.
151

Chiral Induction and Defect Structures in Liquid Crystal Systems

Ferris, Andrew J., PhD 02 September 2020 (has links)
No description available.
152

Artificial Microscopic Structures in Nematic Liquid Crystals Created by Patterned Photoalignment And Controlled Confinement: Instrumentation, Fabrication and Characterization

Culbreath, Christopher Michael 29 April 2015 (has links)
No description available.
153

Google-generationen : En kvantitativ studie i hur generation Z skiljer sig från äldre generationer ur ett börspsykologiskt perspektiv / The Google Generation

Elfstrand, Simon, Persson, Philip January 2022 (has links)
Generation Z har under sin korta tid som investerare på den finansiella marknaden varit med om en säregen börskrasch till följd av coronapandemin 2020. Börskraschen 2020 var unik i förhållande till tidigare börskrascher såsom IT-kraschen 2000 och finanskrisen 2008 eftersom marknaden återhämtade sig och nådde nya rekordnivåer inom ett halvår. Samtidigt stod svenska investerare under de första månaderna av 2022 inför ett nytt ras där den genomsnittliga aktien på Stockholmsbörsen sjunkit med ungefär 36% från dess högsta nivå under perioden 2020–2022 till följd av en hög inflationstakt samt Rysslands invasion av Ukraina. Forskningen kring den yngsta gruppen investerare, generation Z, som saknar erfarenhet av långvariga osäkra marknadsförhållanden är bristfällig och ger därmed upphov till en ny grupp investerare att studera. Studiens syfte är att studera hur riskbenägenhet samvarierar med börspsykologiska bias, kognitiv reflektionsförmåga och erfarenhet från tidigare finansiella kriser samt hur dessa faktorer skiljer sig mellan generation Z och tidigare generationer. Studien finner att generation Z till större del faller för samtliga börspsykologiska bias förutom överreaktion och visar på ett flertal signifikanta skillnader mellan generation Z och äldre generationer. Resultatet visar även att anchoring och konfirmeringsbiassamvarierar signifikant med riskbenägenhet och att den största skillnaden mellan generation Z och äldre generationer kan hänföras till börspsykologiska bias. / Generation Z has during their short time as investors experienced a market crash due to the covid-pandemic in 2020 but also a quick recovery in the same year where the market reached a new all-time high. The market crash in 2020 was unique compared to the crash following the burst of the Dot-com bubble in 2000 and the financial crisis in 2008 because of the quick recovery of the stock market that led to new all-time highs. However, during the first months of 2022, Swedish investors were once again experiencing a market crash where the average stock on the Stockholm stock exchange had lost more than 36% of its value since their peak between 2020-2022 due to high inflation and Russia’s invasion of Ukraine. The youngest group of investors, generation Z, lacks experience from long-lasting uncertainties in the stock market. Research regarding generation Z is insufficient which gives rise to a new group of investors to study. The purpose of the thesis is to study the relationship between risk tolerance and psychological biases, cognitive reflection and experience from previous stock market crashes and how these factors differ between generation Z and older generations. The thesis finds that generation Z is indicated to be more affected by every psychological bias except overreaction and finds several significant differences between generation Z and the older generations. The result also shows that confirmation bias and anchoring have a significant relationship to risk tolerance and that the largest differences between generation Z and older generations are derived from psychological biases.
154

Generation Z:s investeringsbeteende i ingången av en lågkonjunktur : En kvantitativ studie om börspsykologiska faktorers påverkan på generation Z:s investeringsbeslut / Generation Z’s investment behavior at the onset of a recession : A quantitative study on the influence of psychological factors ongeneration Z’s investment decision

Boström, Hanna, Dahlström, Samuel January 2023 (has links)
Bakgrund: Efter många år av högkonjunktur är den svenska ekonomin prognostiserad att föras in i en lågkonjunktur under 2023. Hög inflation hanteras med stigande räntor vilket påverkar investerare på flera sätt, men det finns också en rad börspsykologiska faktorer som kan ha en inverkan på investerare och deras beslut. En åldersgrupp som aldrig investerat under en lågkonjunktur är generation Z. Det är därför intressant att undersöka hur börspsykologiska faktorer påverkar generation Z:s investeringsbeslut under ingången av en lågkonjunktur. Syfte: Syftet med arbetet är därför att undersöka och åskådliggöra vilka börspsykologiska faktorer som har en påverkan på generation Z:s beslutsfattande i ingången av en lågkonjunktur.  Metod: Studien har antagit en kvantitativ insamlingsmetod med en deduktiv ansats, detta genom en genomgripande litteraturstudie följt av en enkätundersökning. Analysen har antagit ett deskriptivt förhållningssätt men har också bestått av enkel linjär regression. Slutsats: Resultatet av undersökningen visar att det finns tendenser av samtliga börspsykologiska biaser i generation Z. Av regressionsanalysen att döma går det dock endast att utläsa signifikanta samband mellan biaserna overconfidence, herding behaviour och anchoring bias mot generation Z:s investeringsbeslut under ingången av en lågkonjunktur.
155

Optimerad sandwichvägg i prefabricerad betong / Optimized sandwich wall in prefabricated concrete

Alsmail, Majed, Rubaij, Baqer January 2023 (has links)
As part of the work in this project, a literature review is conducted to determine the optimal thickness of the outer concrete layer in prefabricated concrete sandwich elements. These elements are used as exterior walls in buildings and consist of a load-bearing inner concrete layer, an intermediate insulation layer, and an outer concrete layer that forms the building's facade. The focus is on optimizing the sandwich wall in precast concrete by reducing the thickness of the outer skin compared to the current standard thickness of 80 mm. This could potentially reduce the weight of the elements by approximately 1.5-2 tons by reducing the thickness from 80 mm to 30 mm. This weight reduction can have a significant impact, for instance, on the crane capacity in large construction projects, allowing a crane to handle all the elements on a construction site without the need for relocation. Additionally, this optimization of the sandwich wall will result in cost savings by using less material in the elements, as well as impacting other aspects of the construction process, such as energy consumption and transportation costs. In this project, test specimens of size 400mm x 400mm have been used, and to draw comprehensive conclusions, full-scale experiments are required to account for factors such as temperature variations and shrinkage in the outer skin. In this work, compressive strength tests have also been conducted to determine the strength of the concrete used in the outer skin of the tested sandwich walls. The concrete used in the tests was a fiber-reinforced concrete from Finja, and the reinforcing mesh was a hot-dip galvanized plaster mesh. Initially, samples were cast to test the laboratory equipment and evaluate the testing methods. Subsequently, the remaining samples were cast and tested according to a predetermined schedule to ensure relevant testing conditions. Samples on the wall elements were made with both diagonal and straight anchoring and were tested under tensile load parallel to the outer layer as well as tensile load perpendicular to the outer layer. In total, 20 samples were conducted in the study, testing various combinations of anchoring systems, loads, reinforcement, and recesses. Samples 1-10 were tested with diagonal anchoring and parallel load, while samples 11-20 were tested with perpendicular anchoring and perpendicular in combination with parallel load. The samples exhibited a variation in failure types, such as grain failure in the outer layer, anchor pull-out, adhesion, and outer layer failure. The highest load values were observed in sample 2 (8.7 kN) and 6 (7.6 kN) for samples 1 to 10, and sample 12 (10.6 kN) and 15 (9 kN) for samples 11 to 20. In summary, it can be stated that the trials have yielded initially positive results regarding the practical use of a thinner outer panel for prefabricated concrete sandwich elements.
156

Opvoedkundige kinesiologie as psigoterapeutiese benadering vir opvoedkundige sielkundiges in die bereiking van emosionele welsyn

De Kock, Maria Magdalena 11 1900 (has links)
Die doel van hierdie ondersoek was om vas te stel of Opvoedkundige Kinesiologie deur die Opvoedkundige Sielkundige gebruik sou kan word as 'n psigoterapeutiese benadering ten einde emosionele welsyn te verhoog. Volgens Edu-K is die brein-liggaam sisteem onlosmaak:lik verbind en emosionele blokkerings is nie slegs in die denke en intellek van die mens gelee nie, maar ook op sellulere vlak vasgele. Navorsing aan die hand van die idiografiese benadering is gedoen. Vyf proe:tpersone, wat aangemeld is met emosionele probleme, het elkeen 'n reeks Edu-K balanserings ontvang volgens individuele behoeftes. Die doel daarvan was om te bepaal ofEdu-K balanserings sou lei tot verhoogde welsyn. Na die reeks balanserings is daar beduidende positiewe veranderinge waargeneem ten opsigte van emosionele probleme, sowel as verbeteringe in ak.ademiese prestasie. Daar is ook algemene prak.tiese riglyne gegee vir ouers, onderwysers en Opvoedkundige Sielkundiges. / The aim of this investigation was to ascertain whether Educational Kinesiology could be applied by the Educational Psychologist as a psychotherapeutic tool in order to enhance emotional wellbeing. According to Edu-K the mind-body system is inseperably one: emotional blocks are not only situated in the mind and intellect of a person, but are recorded on cellular level as well. Research was done by way of an idiographic approach. Five subjects with emotional problems received a series of balances according to their individual needs. The aim was to ascertain whether Edu-K balances could enhance emotional wellbeing. A significant positive improvement in emotional problems as well as in academic performance were noted. General guidelines for parents, teachers and Educational psychologists are also given. / Psychology of Education / M. Ed. (Voorligting)
157

The Role and function of emotions in primary school children's meaningful learning

Langa, Selaelo Norah 11 1900 (has links)
The aim of this study was to critically examine the role and function of emotions in primary school children's meaningful learning. Emotions that are commonly experienced by primary school children were identified and an indication was given of how they relate to meaningful learning. Factors that affect both emotions and meaningful learning were also discussed. In an empirical investigation that was undertaken, it was found that emotions influence meaningful learning of primary school children either positively or negatively. The following emotions pointed to both positive and negative significant correlations with regard to meaningful learning: anger, aggression, anxiety, fear, love, joy and affection. Factors like family size, gender and the environment (life world of primary school children) also influence meaningful learning. / Psychology of Education / M.Ed.(Psychology of Education)
158

住宅市場之價格搜尋行為-定錨效果、仲介服務與市場機制選擇之影響 / Housing Price Search Bebavior: The Effects of Anchoring, Brokerage Service, and Market Mechanism Choice

廖仲仁, Liao,Chung-Jen Unknown Date (has links)
住宅市場是典型的不完全訊息市場,每個市場參與者並不知道潛在交易對象的所在位置、偏好,與保留價格。不完全訊息意涵著,交易者必須透過搜尋才能找到交易對象,因而必須支付搜尋成本,也會形成搜尋市場。不論是住宅交易的買方或者賣方,都可以選擇是自行搜尋交易對象,或者透過仲介業者來協助交易的達成。然而,仲介業者對於住宅搜尋市場之影響,目前仍存在著許多問題是尚待釐清的,而拍賣市場在台灣所扮演的重要性愈來愈高,其市場機制的價格效果也是值得關注的問題: 一、跨區購屋、定錨行為與仲介服務效果 買賣房屋幾乎必然會有議價過程,雙方的議價能力除了受到市場條件的影響外,賣方對於本身所蓋或者所擁有的房屋及附近地區市場等資訊都較買方為多,因此賣方處於較有利的地位。因此,本研究的第一個研究問題即是:就購屋者彼此之間,在地購屋者是否比跨區購屋者具有訊息優勢?參考價格偏誤是否存在?具有訊息優勢的仲介服務能否改善購屋者的搜尋成本與參考價格偏誤?本研究實證結果顯示,基於搜尋成本較高的原因,跨鄉鎮市區的跨區購屋者相對於未跨區者需要多支付3.8%的價格貼水。其次,參考價格愈高的地區,其購屋者會因為定錨效果或參考點偏誤而多支付1%的價格貼水,此外,高價格分配信念的購屋者,平均會支付4.9%的價格貼水。第三,地價上漲率較高地區的購屋者,會誤用自身地區的外推性預期,以為遷入地區也有同等的價格增值空間,而多支付約11.4%的價格貼水。最後,購屋者若尋求仲介服務亦能改善其出價能力,約可降低2.9%的價格貼水,然而,仲介服務在改善搜尋成本與定錨的效果方面則不顯著。 二、仲介服務對於價格分散之影響 本研究利用搜尋成本與價格分散的觀點,檢視具有訊息優勢的仲介服務業者是否真能提高住宅市場的價格搜尋效率。以台北地區的住宅市場資料,指出仲介服務的存在的確可以提高購屋者的搜尋能力。價格分散的估計與檢定結果則顯示:第一,購屋者成交價價格分散小於訂價價格分散;第二,透過仲介服務搜尋者訂價價格分散未顯著異於自行搜尋者的訂價價格分散,可是透過仲介服務搜尋者的成交價價格分散則顯著小於自行搜尋者的成交價價格分散,同時透過仲介服務的價格收斂比率較高。此乃表示,仲介服務業者並未運用其訊息優勢協助賣方進行較有效率的訂價,但是能有效地協助買賣雙方透過配對與議價活動,大幅地降低成交價的價格分散程度。此外,進一步比較國內相關研究結果,目前台北市的住宅市場訊息效率已較過去有顯著的改善,特別是透過仲介服務的改善效果更為明顯。 三、不對稱的仲介服務價格效果 過去有關仲介服務對於交易價格影響的實證結果卻出現許多分歧而不一致的現象,本研究認為過去相關文獻的差異,可能源自以普通最小平方迴歸的方式來估計仲介服務的價格效果時,會忽略住宅價格條件分配的差異。以分量迴歸估計後發現,仲介服務係數在各價格分量呈現很大的差異且顯著,仲介服務的價格效果,在0.10分量約有4.4%的溢價,而 0.75分量以上則約有-5.6%的折價現象。因此,本研究嘗試以高低價格分量的不對稱訂價策略,作為仲介服務價格效果不一致的現象的檢視觀點,並得到實證上的支持。 四、搜尋與拍賣市場機制選擇及拍賣市場績效之再檢視 拍賣市場為購屋者的重要次級市場之一,因此拍賣市場的績效就顯得愈來愈重要。本研究考慮了購屋者的搜尋成本對於市場機制自我選擇偏誤的影響,重新檢視拍賣市場的績效。本研究實證結果顯示,在未考慮自我選擇偏誤下,拍賣市場機制的估計係數為-22.6%,且達1%統計顯著水準。但是,在控制買方與物件的自我選擇偏誤後,我國拍賣市場與搜尋市場間並無顯著的價格差異存在,因而本研究對於過去國內相關文獻認為拍賣市場一定比搜尋市場折價較多的說法,提出了相當的質疑。惟此三年間我國北部地區拍賣市場的拍定率從10%快速成長到30%,而市場條件的快速變化,很可能會造成較大的拍賣價格變異。因此在後續研究上,可以比較拍定率差異較大的時間進行比較研究,以了解本研究結果之穩定度。 / This dissertation employs search theory and behavior theory to study four relative essays. The first essay is to test three questions using a unique data base in the viewpoint of search cost and Anchoring behavior: First, is there anchoring effect or reference price bias on home-purchasing behavior? Second, is there any extrapolative expectation effect of reference price change on homebuyers? Third, can homebuyers reduce price premium from their high search cost or perceived bias? Those answers can help us understand if we can get alternative interpretation to housing price dispersion and if government should provide housing information service. Empirically, we find that out-of-town/district buyers pay a statistically significant price premium in the Taipei area. We also find some evidence consistent with the price premium being driven by high search costs, anchoring effect and extrapolative expectation from heuristics. Finally, homebuyers can lower price premium through real estate brokers in the market. The second essay is to examine the efficiency of housing and brokerage markets in view of price dispersion. We find brokerage service enhance the search ability of homebuyers. We use listing price prices as the prices before search and the actual transaction prices as the price after search, and we also separate the sample into search by homebuyers and search by broker. We find that search by broker decreases the price dispersion compared to search by homebuyers. The third essay is try to explain a number of past and recent studies provided conflicting empirical answers to the effect of real estate brokerage service on housing price. We employ quantile regression to capture the behavior at each quantile of conditional house price distribution and to test the asymmetric effects of brokerage service. An important findings of this paper is that the price effects of real estate brokerage service are significant heterogeneous across the conditional price distribution. The contribution of this paper to the prior literature is to provide empirical evidence by showing that broker might have a positive, negative, or zero impact on the housing prices. The final essay is to discuss the decision making behavior of housing markets mechanism choice. Real estate auction market has been one of main market mechanisms of home purchase. Therefore, the performance of real estate auctions is a very important issue. This article reviews the price premium or discount of real estate auctions by correcting the self-selectivity bias in a view of homebuyers’ search cost. The empirical result shows that the availability of an auction as an alternative has the result of high search cost buyers attending auctions. Next, after accounting for the endogenous nature of this choice and controlling for property and buyer characteristics, prices of properties sold at auction were not lower than those of comparable properties sold in a search market. It is questionable to say the performance of real estate auctions is inferior to that of negotiated sales at Taiwan.
159

雙界二分選擇詢價法-願付價格之起價點偏誤研究

吳孟勳 Unknown Date (has links)
為了處理在願付價格的研究中,極端受訪者對於估計結果所造成的誤差。本文沿用Tsai(2005)所建議採用的三要素混合模型,將受訪者區分為價格再高都願意支付、願意支付合理價格以及價格再低都不願意支付等三種類型。在評估願付價格時,以加速失敗模型(accelerated failure time model,簡稱AFT model)針對願意支付合理價格的受訪者進行估計,並且在考慮不同起價點可能會造成不同程度的起價點偏誤(starting point bias)或是定錨效果(anchoring effect)的情形下,提出一個起價點偏誤調整模型來做探討。我們並以CVDFACTS中的高血壓之願付價格資料進行實證分析。分析結果發現,教育程度越高的男性對於能降低高血壓病患罹患心臟血管相關疾病之新藥願意付較高的金額。此外我們也發現在此筆資料中,不同起價點確實會造成不同程度的偏誤,經由偏誤調整後會得到較高的願付金額。 / A study of willingness-to-pay often suffers from the bias introduced by extreme respondents who are willing to or not willing to pay any price. To overcome the problem, a three-component model proposed by Tsai (2005) is adopted. Under such a circumstance, respondents are classified into three categories, i.e. respondents who are willing to pay any price, unwilling to pay any price, or willing to pay a reasonable price. The willingness-to-pay for those subjects who are willing to pay a reasonable price is again modeled by an accelerated failure time model (AFT model). In this study, we, however, propose an unified model that allows us to look into the issue related to starting point bias and anchoring effect, simultaneously. Willingness-to-pay for cardiovascular disease treatment from a longitudinal follow-up survey- CVDFACTS, is investigated using the new model. Through the use of the model, we are able to detect the effects of starting point biases, and make a proper adjustment accordingly. Our analysis indicates that male respondents with higher education level have an inclination to pay higher price for the new treatment. Besides, we also discover that starting point bias does exist in this dataset.
160

影響地價人員評估公告土地現值行為意向之因素

陳榮卿, Chen, Jung-Ching Unknown Date (has links)
本研究擬以地價人員面對公告土地現值評估時,所形成的心理機制,以計劃行為理論為基礎架構,透過估價相關文獻與社會心理學觀點,尋覓出與本研究相關的外生因素共計6項變數,分別為定錨、從眾、主群體、次群體、自我效能、工作便利性。藉此瞭解影響評估公告土地現值因素,以提供政府機關的參考依據。 經本研究實證結果發現,影響地價人員評估公告土地現值模式內變數,僅有主觀規範未達到統計水準要求,而態度、知覺行為控制皆到達統計水準要求。另外生變數而言定錨、從眾皆會影響地價人員評估公告土地現值的態度。主群體、次群體也會影響地價人員評估公告土地現值的主觀規範。自我效能會影響地價人員評估公告土地現值的知覺行為控制。 / According to mental mechanism that is formed when land-value personnel face the evaluation of announced land current value, the study planned to use the theory of planning behavior as basic frame to find out exogenous factors that are related with the study through documents and social psychology viewpoints related with evaluation. All together, there are six variables: anchoring, conformity, main group, secondary group, self-efficiency, and job convenience, which are used to find out the factors that affect the evaluation of announced land current value, and will be provided to the government offices for reference. The study got the following results through factual evidences: for the variables that affect the evaluation of land-value personnel on, only subjective norm has not met the requirement of statistics level, while both attitude and perceived behavioral control have met the requirement of statistics level. For exogenous variables, anchoring and conformity will affect the attitude of land-value personnel on evaluating announced land current value; main group and secondary group will also affect the subjective norm of land-value personnel on evaluating announced land current value; and self-efficiency will affect the perceived behavioral control of land-value personnel on evaluating announced land current value.

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