Tesi sul tema "A. Quantin (Firm)"
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Tate, Eric Jordon. "Quantum Mechanics". Digital Commons at Loyola Marymount University and Loyola Law School, 2018. http://www.kaltura.com/tiny/8izg0.
Testo completoCampagnol, Alberto <1990>. "The Venetian "meaningful" firms: a quanti-qualitative analysis". Master's Degree Thesis, Università Ca' Foscari Venezia, 2015. http://hdl.handle.net/10579/7318.
Testo completoPeace, Daniel C. "Thin-film Lithium Niobate for Integrated Quantum Optics". Thesis, Griffith University, 2022. http://hdl.handle.net/10072/420851.
Testo completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Coe-Sullivan, Seth (Seth Alexander). "Hybrid organic/quantum dot thin film structures and devices". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33935.
Testo completoIncludes bibliographical references (p. 157-169).
Organic light emitting diodes have undergone rapid advancement over the course of the past decade. Similarly, quantum dot synthesis has progressed to the point that room temperature highly efficient photoluminescence can be realized. It is the purpose of this work to utilize the beneficial properties of these two material sets in a robust light emitting device. New deposition techniques are necessary to the realization of this goal, enabling QD organic hybrids to be created in a quick and reliable manner compatible with known device fabrication methods. With these techniques, quantum dot light emitting devices are fabricated, measured, and analyzed. The devices are of high efficiency and color saturation, and provide us with a test bed for understanding the interactions between inorganic QDs and organic thin films.
by Seth Coe-Sullivan.
Ph.D.
ELSEHRAWY, FARID KHALED MOHAMED FARID. "Photon Management for Thin-Film Quantum Dot Solar Cells". Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2843974.
Testo completoSparks, Aaron, Crystal Kolden, Alan Talhelm, Alistair Smith, Kent Apostol, Daniel Johnson e Luigi Boschetti. "Spectral Indices Accurately Quantify Changes in Seedling Physiology Following Fire: Towards Mechanistic Assessments of Post-Fire Carbon Cycling". MDPI AG, 2016. http://hdl.handle.net/10150/621493.
Testo completoJean, Joel Ph D. Massachusetts Institute of Technology. "Performance limits for colloidal quantum dot and emerging thin-film solar cells". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111858.
Testo completoThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 200-224).
Emerging thin-film solar photovoltaic (PV) technologies can be made lightweight and flexible with simple manufacturing methods, allowing rapid scale-up and ubiquitous deployment of solar power. However, for most emerging PV technologies-including colloidal quantum dots (QDs), perovskites, and organics-power conversion eciency and stability remain major obstacles to commercial development. In this thesis, we evaluate the long-term potential of emerging thin-film PV technologies, focusing on performance limits for QD solar cells in the face of inefficient charge extraction and energetic disorder. First, we introduce material complexity as a framework for analyzing PV technologies and assess the performance and scalability of all leading technologies on equal footing. This analysis points to a unique advantage of emerging thin films-high power-to-weight ratios. As a proof of concept, we demonstrate a process for producing thin, lightweight, transparent, laminable, and flexible PV substrates based on in situ vapor-phase growth of parylene-C films. This approach enables ultra-thin molecular organic solar cells with efficiencies and yields comparable to glass-based cells and weight-specfic power exceeding 6 W/g. Next, we address inefficient charge extraction in QD solar cells by demonstrating an ordered bulk heterojunction device architecture based on solution-grown ZnO nanowire arrays and PbS QDs. The nanowires decouple light absorption from charge extraction, improving the short-circuit current density by 50% and the power conversion eciency by 35%. Finally, we attempt to answer the question "Are QD solar cells worth pursuing further?" We use photothermal deflection spectroscopy to characterize disorder-induced band tailing in PbS QD films across dierent QD sizes, ligands, and processing conditions. Based on these measurements, we calculate radiative eciency limits ranging from 26% to 32%, which suggests that disorder does not severely constrain the long-term potential of PbS QD solar cells.
by Joel Jean.
Ph. D.
Bryngelsson, Erik. "Manufacturing optimization and film stability analysis of PbS quantum dot solar cells". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260053.
Testo completoKvantprickar av halvledande material har en intressant potential att förbättra solcellers verkningsgrad genom en stark absorption inom de infraröda spektrat och ett justerbart bandgap. I detta arbete gjordes ett försök att återskapa en tillverkningsprocess av kvantprickssolceller av PbS, som visat sig framgångsrik vid Uppsala universitet. Två optimeringar undersöktes och stabiliteten av kvantpricksfilmerna analyserades med avseende på tre förvaringsmiljöer med olika exponering för ljus och syre, och mättes med UV-visspektroskopi samt röntgenfotoelektronspektroskopi. Fullt fungerande solceller framställdes men med en lägre prestanda jämfört med resultaten i Uppsala. Optimeringarna var delvis lyckade gällande spridning av EDTlösningen på kvantpricksfilmen av PbS genom att använda etanol och metanol som lösningsmedel. Ingen förbättrad prestanda observerades hos cellerna genom att applicera båda kvantpricksfilmerna i argonatmosfär, jämfört med endast den första. Tydliga skillnader i oxidation för filmerna samt förluster av jodligand kunde identifieras för de olika förvaringsmiljöerna, med bäst stabilitet uppvisad av filmerna som förvarades i argonatmosfär.
VanSant, Kaitlyn. "Thin Film Solar Cells Using ZnO Nanowires, Organic Semiconductors and Quantum Dots". PDXScholar, 2007. https://pdxscholar.library.pdx.edu/open_access_etds/2696.
Testo completoSo, Kin-wah. "A study of strategic orientations and perspective of professional quantity surveying consultant firms in Hong Kong /". Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25947746.
Testo completoHutson, D. "The design, construction and operation of practical thin film superconducting quantum interference devices (SQUIDs)". Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382345.
Testo completoBorrego, Dulce Armonía. "Value Equivalency Analysis: Quantity Compensation, Distance Decay, And Time Treatment". Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/42010.
Testo completoEnvironmental compensation implies the provision of additional natural resources, services or social welfare through restoration projects that are scaled to equal the losses due to environmental damage. The Environmental Liability Directive provides legal framework in the European Union for introducing environmental liability due to damages to the environment caused by industrial operators. Environmental liability requires that harmed natural resources be restored to baseline conditions (primary restoration) and compensated for the accumulated losses (interim losses) produced from the time of the incident until the environment reaches baseline conditions (compensatory restoration). Equivalency Analysis is a methodology used to determine compensation for environmental damage. This study uses an Equivalency Analysis (EA) approach namely the value-to-value approach as a tool to scale remediation and to estimate the amount of compensatory restoration to off-set an environmental damage following a wild forest fire in the northeast of Spain. Value Equivalency Analysis (VEA) is undertaken by a Contingent Valuation (CV) exercise to determine the welfare loss from the initial damage and interim loss and then a remediation project that can be established based on that information. The study elicits the minimum amount of compensation required to make individuals as well off as they would be in the baseline situation. After this the study explores remediation located at a geographical distance from the site of damage. In some cases displacement between damaged resources and restored resources is allowed, this study explores whether longer distance from the damaged site could imply a larger amount of compensation to offset the change in natural resource location. For this, an additional exercise was designed to estimate the trade-off rate for compensating in a farther away site using choice experiment techniques. Finally, the last section focuses on the information provided to respondents regarding payments in the survey instrument. This includes informing respondents how they would pay for the restoration program and whether payments correspond to nominal or real values. The survey instrument takes the form of a single bounded dichotomous choice where the payments are to be made every year over a ten year period and they would go up every year according to inflation.
SONG, YONG. "Electrical Transport Measurement of Niobium Thin Superconducting Film Above An Array of Magnetic Quantum Dots". University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212102762.
Testo completoBothner, Daniel [Verfasser], e Reinhold [Akademischer Betreuer] Kleiner. "Micropatterned Superconducting Film Circuitry for Operation in Hybrid Quantum Devices / Daniel Bothner ; Betreuer: Reinhold Kleiner". Tübingen : Universitätsbibliothek Tübingen, 2014. http://d-nb.info/1162897465/34.
Testo completoLee, Sherwin Frank. "An evaluation of management’s impact on knowledge and related service diversification within quantity surveying firms". Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1045.
Testo completoMany South African quantity surveying practitioners are not committed to developing knowledge and skills, a factor that may hinder the development and viability of the firm. Owing to this problem, the research focuses on the strategic role of management with an emphasis on the support mechanisms for learning and the development of knowledge. The research population focuses on professional quantity surveying firms in the Western Cape region of South Africa. The aim of the research is to understand and identify key components of management‟s strategic influence on: (a) the organisation‟s culture, (b) the development of knowledge and (c) the development of related services and skills within professional quantity surveying firms. The research methodology consists of both qualitative and quantitative methods. Management members provided qualitative data by participating in interviews and staff members provided quantitative data by completing questionnaires. The data for the research comprised a criterion sample of eleven small- and medium-sized diversified firms. The core elements of the research are the organisational culture, learning, and the development of knowledge and service diversification. The research expands information on management‟s role in the organisation‟s culture and development of knowledge in professional quantity surveying firms. The research found that there are many supportive learning elements within the organisational cultures of most quantity surveying firms. Most management members discuss employee development and performance issues, and the lessons learnt from projects. Management occasionally mentors employees and regularly allows employees to undertake challenging work activities. Management members do not, however, include employees in the development of the firm‟s related services. Management primarily established related services because there was a need for these services. The development and transfer of related service knowledge and skills are restricted to management members to a large degree. Management‟s influence on the development of knowledge and skills of employees is somewhat limited and inconsistent. Organisational culture factors such as job satisfaction and the professional development of staff members have to be given appropriate attention by management, especially from a consistency and formal standpoint. Elements that require reviewing include the time allocated for internal learning activities and learning initiatives, other than on-the-job training. Service diversification factors, such as management members restriction of staff members to core quantity surveying services, also have to be reconsidered. Elements of some related services may improve the quality of core quantity surveying services. KEYWORDS: QUANTITY SURVEYING; PROFESSIONAL SERVICE FIRM; CULTURE; LEARNING; KNOWLEDGE; SERVICE DIVERSIFICATION
Al, Imam Shahriar. "Simulation of a 2D pn junction in silicon thin film incorporating quantum transport for carriers". Thesis, Connect to online version, 2006. http://proquest.umi.com/pqdweb?did=1251871411&sid=3&Fmt=2&clientId=10306&RQT=309&VName=PQD.
Testo completoHaber, Johann Friedrich Albert [Verfasser], e Ralf [Akademischer Betreuer] Röhlsberger. "Hard X-ray Quantum Optics in Thin-Film Nanostructures / Johann Friedrich Albert Haber ; Betreuer: Ralf Röhlsberger". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1134866046/34.
Testo completoSo, Kin-wah, e 蘇健華. "A study of strategic orientations and perspective of professional quantity surveying consultant firms in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31251420.
Testo completoErwin, Elizabeth G. "Measuring and Understanding Effects of Prescribed Fire in a Headwater Catchment". Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/91422.
Testo completoMaster of Science
Headwater catchments (where precipitation first becomes streamflow) provide important aquatic habitat and regulate downstream water flows and chemistry. Recent advances in water quality monitoring technologies have created an opportunity to better assess water chemistry variability by using high frequency, submerged water quality sensors. However, these new technologies present new, unique challenges, such as measurement errors that may be induced by different installation methodologies. Accurate measurements are particularly important to evaluate how changes in catchment conditions (e.g., soils, vegetation) impact local and downstream water quality. For example, prescribed fire is a commonly used forest management tool, but questions remain about how it affects catchment soils and headwater stream chemistry. Consequently, understanding the effects of this and other catchment disturbances requires coupled monitoring of both soil properties and water quality. In this thesis, I addressed two objectives: i) assess the effects of commonly used protective housings on water quality sensor measurements (Chapter 2) and ii) evaluate prescribed burn effects in a southwestern Virginia, USA headwater catchment (Chapter 3). In Chapter 2, I demonstrated substantial effects from some of the housings evaluated and suggest that water quality sensors should be deployed in housing types with large openings perpendicular to flow. In Chapter 3, I demonstrated some significant effects of prescribed fire on soil properties (e.g. overall decrease in soil stability, general decreases in total carbon and nitrogen of mineral soils), water quality (e.g., increased levels of dissolved organic matter, turbidity, and nitrate) and flow (increases in stream water levels and flow). While these changes were statistically significant, differences in parameters before and after fire were generally small. Future work should examine if these effects persist through time, and whether this minor level of disturbance causes any negative environmental impacts.
ANUSIT, KAEWPRAJAK. "Improvement of Photovoltaic Properties of Solar Cells with Organic and Inorganic Films Prepared by Meniscuc Coating Technique". Kyoto University, 2019. http://hdl.handle.net/2433/242322.
Testo completoBukowski, Tracie J. "The optical and photoconductive response in germanium quantum dots and indium tin oxide composite thin film structures". [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1000111.
Testo completoTitle from title page of source document. Document formatted into pages; contains xiv, 137 p.; also contains graphics. Includes vita. Includes bibliographical references.
Heeg, Kilian Peter [Verfasser], e Jörg [Akademischer Betreuer] Evers. "X-Ray Quantum Optics With Mössbauer Nuclei In Thin-Film Cavities / Kilian Peter Heeg ; Betreuer: Jörg Evers". Heidelberg : Universitätsbibliothek Heidelberg, 2014. http://d-nb.info/1180301013/34.
Testo completoLongo, Antonio Valerio. "Development of alternate-current thin-film electroluminescent devices based on manganese-doped zinc sulfide quantum-dot technology". Electronic Thesis or Diss., Université Paris Cité, 2021. http://www.theses.fr/2021UNIP7253.
Testo completoIn this work we address the development of a light-emitting device, based on manganesedoped zinc sulfide nanoparticles, working under the application of an alternate-current voltage. Our device is based on a simple capacitive configuration implying a single layer of spin-cast nanoparticles sandwiched between two insulating thin films. In the first part of our work, we studied the nanoparticle system from a fundamental point of view. These nanoparticles, synthesized without the use of any surfactant by a microwave-assisted synthesis, are characterized by a phosphorescence activity in the orange region of the visible spectrum stemming from manganese dopants. In our work, we have observed and studied an enhancement of this optical activity under prolonged UV-light exposition. Our investigation allowed us to ascribe this phenomenon to a local lattice-strain effect around manganese chromophores due to a surface oxidation process induced by UV light. In a second part of our work, we focused on the dielectric properties of the insulating layers, consisting in an hafnium oxide film deposited by atomic layer deposition. By exploring several layer thicknesses and deposition temperatures, we have optimized the dielectric properties of the film, leading to more reliable and robust results. Moreover, we have also addressed the possibility of depositing an alumina layer by an in solution sol-gel approach, highlighting the main limitations of this technique. In the third part of the manuscript, the main characteristics of the complete electroluminescent device are addressed. More specifically, we recovered the orange emission band due to manganese doping, as well as the typical threshold behavior of the intensity of the emitted light as a function of the applied voltage. By exploiting structural characterization, impedance spectroscopy measurements and a careful comparison with theoretical works on similar devices, we have been able to state that the mechanism behind the observed light emission is a fieldinduced charge-creation process within the active layer only, followed by charge transport across the layer and radiative recombination within a single nanoparticle. Compared to previous works based on manganese-doped zinc sulfide nanoparticles, our key point has been the use of uncoated nanoparticles which allowed to achieve a very compact nanoparticle arrangement, favoring the physical mechanism mentioned above. Our work constitutes a step forward in the development of more compact, industrially feasible and eco-friendly light emitting devices
Siu, Choi-pai Johnny. "Estate agency marketing in People's Republic of China : a business opportunity for a surveying professional firm in Hong Kong /". Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21020383.
Testo completoChauhan, Lokendra Pratap Singh. "Modelling stock market performance of firms as a function of the quality and quantity of intellectual property owned". Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16218.
Testo completoChauhan, Lokendra P. S. "Modelling stock market performance of firms as a function of the quality and quantity of intellectual property owned". Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-07092007-111641/.
Testo completoBrzezinski, Krzysztof. "Essays on effects of uncertainty on competition among firms and political parties". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/essays-on-effects-of-uncertainty-on-competition-among-firms-and-political-parties(5338ac5b-9ebf-47e3-99a3-43bd37a5ec0a).html.
Testo completoHuang, Wei-Jie, e Wei-Jie Huang. "Towards Increased Photovoltaic Energy Generation Efficiency and Reliability: Quantum-Scale Spectral Sensitizers in Thin-Film Hybrid Devices and Microcracking in Monocrystalline Si". Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/623175.
Testo completoHaverinen, H. (Hanna). "Inkjet-printed quantum dot hybrid light-emitting devices—towards display applications". Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514261275.
Testo completoRodrigues, Cassy Anne dos Santos. "Quantas vezes devemos queimar o Cerrado? O efeito da frequência do fogo em comunidades vegetais de campo sujo de Cerrado /". Rio Claro, 2019. http://hdl.handle.net/11449/191448.
Testo completoResumo: O Cerrado é formado por fisionomias campestres e savânicas, evoluiu na presença do fogo e depende dele para manter suas fisionomias e biodiversidade. O regime de fogo influencia diretamente na montagem da comunidade vegetal, na regeneração e nas habilidades competitivas das plantas. A frequência é um dos fatores do regime de fogo e alterações nela podem ser prejudiciais até mesmo para plantas e comunidades adaptadas ao fogo. Portanto, este estudo busca compreender os efeitos de diferentes frequências de fogo em comunidades de campo sujo de Cerrado. Para isso, foram realizados levantamentos da vegetação e coleta de biomassa em áreas com diferentes históricos de fogo (excluído do fogo, queimadas anualmente e bienalmente), o que forneceu os dados de composição e produtividade da comunidade. Os levantamentos, incluindo a cobertura (%) por espécie, foram realizados em 10 subparcelas de 1x1m por tratamento (10 subparcelas/tratamento,3 tratamentos, 4 parcelas/tratamento). Avaliamos também através da taxa de propagação (m.s-1), eficiência de queima (%) e intensidade (kW.m-1) entre outros parâmetros do fogo, os efeitos de diferentes frequências no comportamento do fogo. Nossos resultados mostraram que a riqueza de espécies das comunidades vegetais foi maior nas áreas com frequência anual de fogo do que nas excluídas, 6 meses após o fogo e maior para as bienais do que as excluídas 12 meses após o fogo. O índice de diversidade foi maior no tratamento anual de queima antes e 12 meses apó... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The Cerrado is formed by grasslands and savannah physiognomies, evolved in the presence of fire and depends on it to maintain its physiognomies and biodiversity. The fire regime influences the plant community assembly, the regeneration and the competitive abilities of the plants. Frequency is one of the factors of the fire regime and changes in it can be detrimental even to fire-adapted plants and communities. Therefore, this study aimed to understand the effects of different fire frequencies in campo sujo of Cerrado communities. For this, vegetation surveys and biomass collection were carried out in areas with different fire histories (excluded from fire, burned annually and biennially), which provided community composition and productivity data. Surveys, including coverage (%) by species, were performed on 10 1x1m subplots per treatment (10 subplots / treatment, 3 treatments, 4 plots / treatment). We also evaluated through propagation rate (m.s-1), firing efficiency (%) and intensity (kW.m-1) among other fire parameters, the effects of different frequencies on fire behavior. Our results showed that species richness of plant communities was higher in areas with annual fire frequency than in excluded areas 6 months after fire and higher for biennials than those excluded 12 months after fire. The diversity index was higher in the annual burn treatment before and 12 months after the burns. Regarding the number of species per functional group, only the forbs presented increase a... (Complete abstract click electronic access below)
Mestre
Barros, Ana Margarida Grácio de. "Determinantes ambientais de alguns padrões espaciais de fogo em regiões de tipo mediterrânico". Doctoral thesis, ISA, 2013. http://hdl.handle.net/10400.5/6445.
Testo completoFire provides a fundamental ecological function to many ecosystems. Nevertheless, in the past decades, the occurrence of very large, severe fires, has called for attention from managers, scientists and society in general. Understanding fire drivers constitutes an important step to identify regions of higher risk, establish priorities for protection, and manage the landscape to increase its fire resilience. The main goal of the present work is to explore relationships between fire, vegetation, topography and meteorology at landscape scale. It applies principal component analysis and circular statistics to determine the existence of spatial patterns in fire perimeter orientation, in two mediterranean climate regions, relying on a 31-year fire atlas for Portugal and 100-year fire atlas for California. Additionally it applies quantile regression to evaluate the relationship between fire size and fire selectivity towards different land cover types, in Portugal. The results presented here reinforce the importance of meteorological conditions as the primary driver of fire spread, at landscape scale and in the regions considered.
Klemsa, David. "Detailní projektování technologického pracoviště ve firmě ADOZ, s.r.o". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382280.
Testo completoOliveira, Joao. "Export marketing adaptation and export performance". Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17457.
Testo completoLandmann, Tobias. "A case study for Skukuza : estimating biophysical poperties of fires using EOS-MODIS satellite data ; a field and remote sensing study to quantify burnt area and fire effects in South African semi-arid savannas /". Aachen : Shaker-Verl, 2004. http://www.loc.gov/catdir/toc/fy0708/2006485603.html.
Testo completoLandmann, Tobias. "A case study for Skukuza : estimating biophysical properties of fires using EOS-MODIS satellite data : a field and remote sensing study to quantify burnt area and fire effects in South African semi-arid savannas /". Aachen : Shaker, 2004. http://www.loc.gov/catdir/toc/fy0708/2006485603.html.
Testo completoPal, Singh Amrit [Verfasser], e Roman [Akademischer Betreuer] Schnabel. "Intensity-dependent phase shifts in optical materials for quantum state preparation and absorption measurements in thin film coatings and bulk material / Amrit Pal Singh ; Betreuer: Roman Schnabel". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2018. http://d-nb.info/1161530266/34.
Testo completoGöhring, HOLGER [Verfasser], Metin [Akademischer Betreuer] Tolan e Manfred [Gutachter] Bayer. "Structural investigation of the impact of magnetostriction on GaMnAs thin film lattices and the thermal expansion of (In,Ga)As/GaAs quantum dots / Holger Göhring ; Gutachter: Manfred Bayer ; Betreuer: Metin Tolan". Dortmund : Universitätsbibliothek Dortmund, 2017. http://d-nb.info/1136785256/34.
Testo completoLin, Yuh Chwen, e 林鈺淳. "Firm''s Risk Management and Quantity Analysis". Thesis, 1995. http://ndltd.ncl.edu.tw/handle/10221396491702808358.
Testo completoYen, Wan-Chen, e 嚴婉禎. "Firm Size and Survival Duration - An Application of Censored Quantile Regression". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/51493507436446998075.
Testo completo中原大學
國際貿易研究所
95
The relationship between firm initial size and survival is different within some industrial studies. Some studies indicate that they are not related, some studies reveal that they are positively or negatively correlated. In addition, some empirical studies analyze the relationship between performance and firm size of listed firm. The outcomes are also discordant. We think the controversy is the result of lack of duration effect. Firms usually enter with small size and we usually expect survival duration of them is short (Geroski, 1995). Furthermore, a lot of empirical works find that small firms usually have shorter survival duration. Besides, Jovanovic (1982) conclude that efficient firms would grow and survive, but it would take time to find their efficiency. However, if survival duration is not long enough, the effect of experience will not work. Therefore we infer that, in the short survival duration, size does matter. But in the lung survival duration, because of the effect of experience or learning effect, size is not that important. Due to the limitation in data availability, we use listed firms of electronic industry in Taiwan, from January in 1988 to April in 2007. We use offering stock volume as size proxy. We imply censored quantile regression to observe whether the relationship between firm size and survival duration change, and compare the outcome with Cox proportional hazard model. The results from CQR indicate that the effects of firm size are changed. Firm size and survival are correlated in the law quantiles, but are uncorrelated in the high quantiles. As far as firms with long survival duration concerned size does not affect. However, firms who live short, firm size is concerned. In the short duration, they are positively correlated. The result is consistent with many findings. Large firms are easy to survive. In addition to size, results in square term of size, age at offering and offering activity reveals effects are changed in different quantils. However, the results from CPH are not significant, because CPH is in the mean conditional. If we use CPH as analysis tool, the real effect may be averaged and we could not see the changes of size effect.
Chien, Feng-Ping, e 錢鳳屏. "Corporate Social Responsibility and Firm Performance: An Application of Quantile Regression". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38512539588236287555.
Testo completo國立高雄應用科技大學
國際企業研究所
101
A firm’s fulfilling its corporate social responsibility (CSR) has become a new competitive advantage of a firm. This study explores how the fulfillment of CSR would impact the firm performance based on the CSR framework of stakeholder and the analysis of quantile regression. Contrast to the earlier CSR framework comprising only of economic, social, and environmental dimensions, we include the fourth dimension, corporate governance, to evaluate a firm’s CSR contributions to stakeholders. Our results find that CSR has a positive impact on firm performance. Moreover, the result of quantile regression indicates that the impact of CSR would change with the quantile of the dependent variables, indicating a positive, non-linear relationship between CSR and firm performance.
Wang, Yen-Hsiu, e 汪顏秀. "The effects of R&D expenditure、IFRS enforcement and firm-specific characteristics on firm performance: A quantile regression approach". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/bt3un6.
Testo completo國立臺中科技大學
會計資訊系碩士班
105
In response to an increasing demand for transparent and comparable financial statements, the globalization of corporation, and the attraction of foreign capitals investment, the improvement of firms’ competitions, Taiwan Supervisory Commission imposed the introduction of IFRS for all listed firms in 2012 to improve accounting information quality. Using quantile regressions, this study explores the impacts of research and development expenditures (R&D), IFRS enforcement, and firm characteristics on firm performance. There are 10,722 observations of both four-years-period before (2008-2011) and after (2012-2015) IFRS enforcement in this study. To realize the lags effects of the research factors, the performance is lagged by one to three periods. In many cases, quantile regression estimates are quite different from those of OLS regressions. The results show that R&D positively (negatively) influences good (bad) performance firms. The enforcement of IFRS turns performance from negative to positive in the long run. For the highly-performance companies larger in size worse their performance. Firm history decreases performance if the performance is 25 percent above companies. Book-to-market and leverage ratio saliently damage performance. Last year net loss determines the bad performance following years.
Yang, Jia-Rung, e 楊佳蓉. "The Impacts of Exchange Rate Volatility on Firm Valuation- Quantile Regression Analysis". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/70704182284021481714.
Testo completo國立高雄第一科技大學
財務管理所
97
Exchange rate exposure is defined as exchange rate movements affect the value of firms. Many financial literatures and models indicate that exchange rate fluctuations have a significant impact on firm value, regardless of whether the firm is domestically or internationally oriented. In contrast to theoretical fundations, numerous empirical results show a low proportion of companies are significantly exposed to exchange rate risk. Following papers make effort try to solve this dilemma; however, they still get weak relationships between exchange rates and firm value. In order to improve exchange rate exposure significant ratio, we adapt “Quantile Regression” to study exchange rate exposure in this paper. According to sales exporting ratio and industry classification, we divide our samples into: (i) internal-sale firms and external-sale firms, and (ii) a variety of industries. Empirical findings show that significant proportion obviously increases in quantile 0.1 and quantile 0.9. Quantile regression method exceeds traditional OLS way enormously in detecting exchange rate exposure. The significant figures even rise to a fifty per cent. This indicates sample character is not vital reason resulting in low level of significant ratio and economic exchange exposure is important for firms. This paper also discovers some phenomena: different degree of stock return has different exchange rate risk no matter risk direction or risk size. In risk direction, exchange change movement incurs contrary direction; in risk size, it seems to appear there is much more exchange rate exposure in bull market in external-sale firms .
Lin, Hung-Yuan, e 林鴻源. "Laser Deposition ZnSe Quantum dot Glass Thin Film". Thesis, 1996. http://ndltd.ncl.edu.tw/handle/95702695329813831774.
Testo completo國立交通大學
光電工程研究所
84
ZnSe doped glasses thin films were deposited on silicon and substrate by using of Q-switched Nd:YAG laser, and the targert were prepared by sol-gel methed of colloid chemical technique. From the SEM, we can realize the fine structure of the ZnSe thin film surface and estimate the grain size about 200 A. By changing the deposition condition, we obtain a single crystallite of ZnSe thin film which is identified to be H(002) or C(111) by XRD, and the grain sizecaculation through Half Maximum of XRD peak tch the result of SEM. In the Raman spetra, we make sure the ZnSe bond, and the peak show that the phonon frequency shift to lower side for grain size becaming smaller. The energy gap of ZnSe film is acquired by the Transmission spectra has the phenomonon of blue shift, and this result is corresponding with the prediction of Quantum dot effect.
Chen, Ai-Lin, e 陳艾琳. "Analyzing the Link Between Real Exchange Rate and Firm Performance by Quantile Regression". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/34247581861079024032.
Testo completo銘傳大學
國際企業學系碩士班
100
In this paper, we discuss the effect of industry real exchange rate on the firm performance by quantile regression. Firstly, we calculate the industry real exchange rate from 1991 to 2010. The industries are food, plastics, rubber, textile, non-metal, metal, machinery and electronics. Secondly, we use quantile regression to analyze publicly traded companies data in these industries in each year. Our findings indicate that industry real exchange rate affect firm performance significantly in 90% quantile, especially for the electronics.
Heredia, Elica A., e 何麗安. "Quantum phenomena of thin-film transistors at cryogenic temperatures". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/p7a9jj.
Testo completo國立臺灣師範大學
物理學系
106
This experiment focuses on the competition of weak localization (WL) and weak antilocalization (WAL) on a single gate and dual gate a-IGZO, these quantum interference effects on systems have been studied on a dual gate a-IGZO by varying the gate voltages (top gate and bottom gate), on the other hand, temperature and gate voltage were varied on a single gate a-IGZO to observe the competition between WL and WAL. The universal dependence of conductivity was partially unveiled on single gate a-IGZO and the full profile of this intriguing universal dependence was shown on the dual gate a-IGZO. It is speculated that the prefactor for WL (α0) and prefactor for WAL (α1) are determined by the ratio of the gap opening at the Dirac point to the fermi energy level, which can be manipulated via electric gating. This work hopes to help build a theoretical model and attract theoretical contributions that should be a great advantage in future applications in nanoelectronics and spintronics.
Huang, Shung-Cheng, e 黃順誠. "Growth of One Monolayer of PbSe Quantum-dot Thin Film". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/51762082076791828945.
Testo completo國立中興大學
物理學系
94
In this thesis, we research for the growth of one monolayer of PbSe quantum-dot thin film. The PbSe spherical quantum dots(SQD) were dispersed in toluene solution and kept the solution in proportionate concentration. Subsequently, deposited a drop of solution onto a fresh surface at different temperatures. We found the growths of one monolayer of PbSe quantum-dot thin film have different morphology. At room temperature, the PbSe SQD islands reveal dendritic fashion. As we raise the temperature of substrate above 100℃ for deposition, the PbSe SQD islands become rounded and the surface also become more flat. Consequently, we observed the the superlattice structure is hexagonal closed-packed(HCP). We have studie the growth behavior by using atomic force microscope. The PbSe SQD starts to nucleate, and finally grow films. The thickness of the PbSe SQD monolayer is 10~11nm.
Ching-KangChen e 陳敬岡. "Investigation of Albumen Thin Film Transistor Memories Using Quantum Dots". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/13706900433436741096.
Testo completo國立成功大學
微電子工程研究所碩博士班
101
The main purpose of this thesis was focused on the deposition of quantum dots (QDs) thin film in organic memory thin film transistors by microcontact printing technique. In the study of organic thin film transistors, the transfer contact printing method could effectively prevent the destruction of thin film from organic solvent. Besides, contact printing technique has the advantage of thin film patterning. Therefore, the number of leakage current paths could be effectively reduced by the application of contact printing technique in the fabricated procedures. In this study, we used polydimethylsiloxane (PDMS) to be the stamps. After spin coating the QDs on the PDMS stamp, the QDs were then transferred onto the dielectric layer subsequently. The QDs can be used as floating gate of the devices. Floating gate partially offset the internal electric field which inducing the shift of threshold voltage. The shift of threshold voltage accomplished memory effect. In the study of QDs’ application for transistor-type memory, the basic structure was n+ - Si (gate electrode)/SiO2 (dielectric layer)/poly(methyl methacrylate) (PMMA) (adhesion layer)/quantum dots (floating gate)/pentacene (channel layer)/gold (source and drain layer). The floating gate of conventional devices was fabricated by spin coating the QD-PMMA composite on the SiO2 thin film. Compared with spin coating method, using the PDMS stamp can also successfully transfer QDs onto PMMA layer. The QDs were playing in an important role to capture the carrier charges in the transistor device. The device showed typical transistor characteristics under electrical operation. Under hysteresis testing, the memory window could increase from 25 V with spin coating method to 74.3 V using contact printing technique. And the switching property exhibited over 100 write-read-erase-read cycles. Furthermore, the retention time achieved more than 32 years (109 seconds). In study of albumen based thin film transistors and memory transistors, the dielectric material was changed to be albumen which is friendly to our environment. The first half of experiment was spin-coating above the surface of chicken albumen thin film with water for changing surface free energy. After increasing the surface free energy of albumen thin film to match with that of active layer (pentacene film), the quality of pentacene crystal was markedly improved. Because the crystal quality of pentacene layer can directly affect performance of transistor, the yield rate could increase from 12.5% to 80% after water treatment. In last half of experiment, the contact printing method was used to fabricate quantum dots. Under Atomic Force Microscopy (AFM) measurements, the surface roughness of albumen film with spin coating method was 3.48 nm and could reduce to 2.48 nm by applying contact printing technique. Furthermore, the surface of chicken albumen thin film was treated by spin coating water for preventing the damage from toluene and efficiently reducing surface roughness. The surface roughness of albumen film could reach 1.47 nm with water protection. After transferring QDs onto albumen film, the transistor-type memory purpose was realized. In this device testing, the memory window was 50.33 V. But the switching property and stability of memory thin film transistors still have room to be improved.
Maria, Ahmed. "Improving the photoluminescence quantum efficiency of size-tunable, solution-processed lead-sulfide quantum dots in film". 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=95027&T=F.
Testo completoChang, Wan-Fang, e 張婉芳. "A Study on Firm size, Financial Dependence, Financial Development and Economic Growth : A Quantile Regression Approach". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/26e3gr.
Testo completo淡江大學
經濟學系碩士班
94
This paper explores the relationship among economic growth, financial development, and financial structure, using quantile approach. Applying cross-sectional data on 77 countries over 1990-2003 periods, I find that: 1. For countries with low and medium economics growth rates, the improvement of financial market facilitates economic growth. Both financial development and financial structure have no significant effect on economic growth in the countries with high economic growth. 2. For countries with low economic growth rates, the greater the external dependence, the stronger the positive effect of financial market development on long-term economic growth. Both financial development and financial structure show ambiguous effects on economic growth in the countries with medium economic growth rate. While financial development and financial structure are not significantly related to economic growth for the countries with high economic growth rates. 3. For the countries with low and medium economics growth rates, the more the country toward medium and small firm size, the stronger the positive effect of financial market development on long-term economic growth. Both financial development and financial structure are not significantly related to economic growth in countries with high economic growth rates. 4. For the countries with low and medium economics growth rates, the more the country toward medium and small firm size, the higher accounting standards may harm economic growth. For the countries with high economics growth rates, account standards are not significantly related to economic growth.
Din, Hong-Ren, e 丁虹仁. "Location and Quantity competition in a Spatial Model with unequal firms". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38266351236261568900.
Testo completo華梵大學
工業工程與經營資訊學系碩士班
94
This research analyzes a linear (circular) market where two cooperative firms compete with a single firm at each point in space. In the location-quantity game, each firm choices their locations simultaneously and then choices their product quantity according to the observations of all players’ choices in the previous stage, which so as to maximize its profit. The main conclusion are as follows: (1). Regardless of product is substitute or complement, the single rival will locate at the center of the linear city. (2). Regardless of product is substitute or complement, if any one of the three firm’s location is given in zero, then the optimal location of the cooperative firms will locate equidistant from the single rival firm on the circle. (3). An increase (decrease) in the transportation costs will make the cooperative firms move away from (close to) the rival in the linear (circular) market when firm’s product is substitute or complement.