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Dissertations / Theses on the topic 'Active and passive strategies'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Wong, Miu-kuen Ruby. "Cantonese-speaking children's comprehension strategies for active and passive sentences." Click to view the E-thesis via HKUTO, 1995. http://sunzi.lib.hku.hk/hkuto/record/B36209223.

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Thesis (B.Sc)--University of Hong Kong, 1995.<br>"A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, April 28, 1995." Also available in print.

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Goerlitz, Holger R. "Perceptual strategies in active and passive hearing of Neotropical bats." Diss., Connect to this title online, 2008. http://edoc.ub.uni-muenchen.de/9192/.

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3

Hansson, Magdalena. "Active or passive pain coping strategies among participants before hip school." Thesis, Linnéuniversitetet, Institutionen för pedagogik, psykologi och idrottsvetenskap, PPI, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12360.

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Objective. To assess the use of active and passive pain coping strategies in persons with hip disability before participating in hip school and analyse differences between and correlations with gender and other different background factors and further to analyse the test-retest reliability of the Swedish version of Pain Coping Inventory (PCI-S). Methods. A descriptive cross sectional study among 52 persons (41 women, 11 men, mean age 63±8.6) was conducted. The PCI-S was filled in together with a background form and Hip disability and Osteoarthritis Outcome Score (HOOS). 10 persons also fille

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4

Zhang, Rongpeng. "Dynamic Optimization of Integrated Active - Passive Strategies for Building Enthalpy Control." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/404.

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The building sector has become the largest consumer of end use energy in the world, exceeding both the industry and the transportation sectors. Extensive types of energy saving techniques have been developed in the past two decades to mitigate the impact of buildings on the environment. Instead of the conventional active building environmental control approaches that solely rely on the mechanical air conditioning systems, increasing attention is given to the passive and mixed-mode approaches in buildings. This thesis aims to explore the integration of passive cooling approaches and active air

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5

Paknejad, Seyedahmadian Ahmad. "Passive and Active Strategies for Vibration Control of Lightly Damped Structures." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/325768.

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Lightweight designs in engineering applications give rise to flexible structures with extremely low internal damping. Vibrations of these flexible structures due to an unwanted excitation of system resonances may lead to high cycle fatigue failure and noise propagation. A common method to suppress the vibrations is to increase the damping of the system using one of the classical control techniques i.e. passive, active, and/or hybrid. Passive techniques are those control systems that are simply integrated into the structures with no need of external power source for their operations, like visco

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Wong, Wai-ming Rita. "Comprehension strategies of active and passive sentences in language-impaired Cantonese-speaking children." Click to view the E-thesis via HKUTO, 1996. http://sunzi.lib.hku.hk/hkuto/record/B36209363.

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Thesis (B.Sc)--University of Hong Kong, 1996.<br>"A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, April 29, 1996." Also available in print.

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7

Fogg, Christiana Nichols. "Active and passive immunization strategies for protection of mice and monkeys against Orthopoxvirus infection." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/4084.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Cell Biology & Molecular Genetics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Black, Ross Arthur Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Compensatory strategies in humans performing active and passive gaze fixation and re-fixation tasks after unilateral vestibular deafferentation." Publisher:University of New South Wales. Graduate School of Biomedical Engineering, 2009. http://handle.unsw.edu.au/1959.4/43541.

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The human vestibulo-ocular reflex (VOR) stabilizes gaze during head movement. The reflex is typically tested in a clinic or laboratory using passive rotations or artificial stimuli which measure the amount of damage the vestibular apparatus has suffered. However, during everyday activities the vestibular system is stimulated by active, self generated head movements. Head movements are often rapid and associated with the goal of achieving either gaze-fixation or re-fixation. Patients who complain of on-going symptoms will typically identify a particular position or movement that aggravates thei

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9

Madon, Mohd Sani. "Preparatory strategies for optimising an all-out sprint effort." University of Western Australia. School of Human Movement and Exercise Science, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0109.

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[Truncated abstract] The inclusion of a warm-up in the form of prior exercise (PE) is generally advocated as a preparatory strategy of choice to improve sprint performance. Although there is evidence that both increasing muscle temperature and mobilising the cardiorespiratory system prior to exercise contribute largely to the benefit of PE on sprint performance, their relative importance is unknown. Another important question relates to situations where an athlete has to engage in a sprint shortly after one or several earlier sprints. Under these conditions, is engaging in mild exercise also t

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Karlsson, Anna, and Johansson Ronja Nikkanen. "Inre tal hos barn med utvecklingsstörning : Finns det ett samband mellan inre tal och storleken på ordförråd?" Thesis, Linköpings universitet, Institutionen för klinisk och experimentell medicin, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-109071.

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Bakgrund: Då barn möts av en kognitiv utmaning talar de ofta högt med sig själva. Detta är en vanlig strategi hos barn i femårsåldern och kallas privat tal (private speech) vilket gradvis, i takt med att barnen åldras, utvecklas till en tyst form kallat inre tal. Inre tal är centralt i flera kognitiva uppgifter bland annat planering och problemlösning och är även involverat i arbetsminnet, främst i den fonologiska loopen. Det finns en begränsning i arbetsminnets kapacitet och även den fonologiska loopen är begränsad hos barn med utvecklingsstörning. Arbetsminneskapaciteten och utvecklingen av

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11

Smith, Jacques. "Constructing low cost core-satellite portfolios with multiple risk constraints: practical applications to Robo advising in South Africa using active, passive and smart-beta strategies." Master's thesis, Faculty of Commerce, 2020. http://hdl.handle.net/11427/32985.

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Risk and tracking error budgeting was originally adopted by large institutional investors, including pension funds, plan sponsors, foundations, and endowments. More recently, risk and tracking error budgeting have gained popularity among financial advisors, multi-managers, fund of funds managers, high net worth individuals as well as retail investors. These techniques contribute to the portfolio optimisation process by limiting the extent to which a portfolio can deviate from its benchmark with regards to risk and tracking error. This is an ambitious paper that attempts to determine the optima

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Tomášik, Ivan. "Analýza úspešnosti vybraných pasívnych a aktívnych investičných stratégií." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-113643.

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This working paper discusses in its first section differences between active and passive investment strategies. It also deals with convenience of active funds by overcoming returns of indices size of fees and share of assets in active and passive investment forms. It also discusses index investing and exchange traded funds. The second chapter deals with short selling, its history, regulation, fees and criteria for short selling. Last chapter analyzed financial indicators of stock titles from DSW Watchlist. The results of the analysis have been also tested. Results are shown in the third chapte

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13

Gunnarsson, Simon, and Filip Haskå. "Smart Beta : en kvantitativ studie om hur tre Smart Beta-strategier presterar på den svenska aktiemarknaden." Thesis, Högskolan Kristianstad, Fakulteten för ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-21194.

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Recently, the debate on passive versus active fund management has been a major focus on the Swedish capital market. Passive management is gaining more and more market shares. However, theories and previous research show that Smart Beta strategies outperform their passive benchmark index. The Smart Beta strategy is described as a hybrid between active and passive fund management, where it takes advantage of the low management cost of passive fund management and active fund management’s ability to select. This study presents three new Smart Beta strategies based on the key ratios ROA, profit mar

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Chit, Ngwe Lin Myat, and Feiran Wang. "Market Timing Ability of Bond-Equity Yield Ratio : A study of trading strategies in Japan, Malaysia and Singapore." Thesis, Umeå universitet, Företagsekonomi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-95253.

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Market Timing Strategy is an active investment strategy, which is based on the signals of indicators, for the investors to make their investment decisions. However, there has always been the question on which variable is a good indicator, that would provide superior returns for the investment. Bond to Equity Yield Ratio (BEYR) is a new indicator widely researched by many academics in the field of finance and extensively applied by practitioners of the financial markets during the last two decades. Efficient Market Hypothesis (EMH) is a theory in finance which states that stock prices are alway

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Pagani, Margherita. "The Role of consumer experiential engagement in new media based social networks environnments : implications for marketing strategies." Thesis, Lyon 3, 2015. http://www.theses.fr/2014LYO30091.

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Le but de cette thèse est de comprendre comment les entreprises peuvent faire augmenter une expérience donnant naissance à l’engagement des consommateurs grâce aux nouveaux médias (comme les vidéos du Web, les dispositifs de téléphonie mobile et la télévision "traditionnelle") afin de stimuler le comportement actif des clients et de redéfinir des stratégies commerciales de marketing. Nous avons structuré notre analyse sur trois études d’approche.Dans la première étude, nous avons décrit comment l'engagement personnel avec le contenu et l'engagement social interactif (résultant du sens perçu de

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Mårtensson, Patrik, and Henrik Sjöberg. "Smart Beta : en studie om hur smart beta strategier presterar på den svenska börsen." Thesis, Högskolan Kristianstad, Fakulteten för ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-17953.

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Den ständigt pågående debatten om aktiv respektive passiv förvaltning av fonder tycks aldrig upphöra. Det finns för- och nackdelar inom respektive kategori och vetenskapliga teorier kan argumentera för båda sätten. Men den senaste tiden har ett nytt förvaltningssätt introducerats, smart beta. Smart beta kan klassificeras som en hybrid mellan passiv och aktiv förvaltning. Tidigare studier inom området har uppvisat goda resultat för smart beta, dock i andra geografiska områden och med stora globala index. I denna studie introduceras en ny typ av smart beta strategi som har skapats efter ett löns

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17

Pourabdollah, Nezhad Maziar. "Active and passive plasmonic devices." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3284224.

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Thesis (Ph. D.)--University of California, San Diego, 2007.<br>Title from first page of PDF file (viewed January 14, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 93-102).

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Conotter, Valentina. "Active and Passive Multimedia Forensics." Doctoral thesis, Università degli studi di Trento, 2011. https://hdl.handle.net/11572/368291.

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Thanks to their huge expressive capability, coupled with the widespread use of the Internet and of affordable and high quality cameras and computers, digital multimedia represent nowadays one of the principal means of communication. Besides the many benefits, the wide proliferation of such contents has lead to problematic issues regarding their authen- ticity and security. To cope with such problems, the scientific community has focused its attention on digital forensic techniques. The objective of this doctoral study is to actively contribute to this field of research, developing efficient te

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Conotter, Valentina. "Active and Passive Multimedia Forensics." Doctoral thesis, University of Trento, 2011. http://eprints-phd.biblio.unitn.it/575/1/Conotter_PhD-Thesis.pdf.

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Thanks to their huge expressive capability, coupled with the widespread use of the Internet and of affordable and high quality cameras and computers, digital multimedia represent nowadays one of the principal means of communication. Besides the many benefits, the wide proliferation of such contents has lead to problematic issues regarding their authen- ticity and security. To cope with such problems, the scientific community has focused its attention on digital forensic techniques. The objective of this doctoral study is to actively contribute to this field of research, developing efficient t

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20

Zuo, Fei. "Passive and active currency portfolio optimisation." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/22612.

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This thesis examines the performance of currency-only portfolios with different strategies, in out-of-sample analysis. I first examine a number of passive portfolio strategies into currency market in out-of-sample analysis. The strategies I applied in this chapter include sample-based mean-variance portfolio and its extension, minimum variance portfolio, and equally-weighted risk contribution model. Moreover, I consider GDP portfolio and Trade portfolio as market value portfolio for currency market. With naïve portfolio, there are 12 different asset allocation models. In my out-of-sample analy

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Maldonado-Mercado, Julio Cesar. "Passive and active control of structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36654.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.<br>Includes bibliographical references (leaves 94-98).<br>by Julio Cesar Maldonado-Mercado.<br>M.S.

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Scheitrum, Raquel. "Smoking passive addiction or active coping? /." Instructions for remote access. Click here to access this electronic resource. Access available to Kutztown University faculty, staff, and students only, 1999. http://www.kutztown.edu/library/services/remote_access.asp.

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Thesis (M.A.)--Kutztown University of Pennsylvania, 1999.<br>Source: Masters Abstracts International, Volume: 45-06, page: 2778. Typescript. Abstract included as two unpaged leaves at back of volume. Includes bibliographical references (leaves 30-35).

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Іванов, І. О. "Розробка та моделювання адаптивної саморегулюючої системи управління інвестиційним портфелем". Thesis, Одеський національний економічний університет, 2020. http://dspace.oneu.edu.ua/jspui/handle/123456789/12590.

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В першому розділі кваліфікаційної роботи досліджено теоретичні аспекти сутності інвестиційного портфелю та особливостей його формування, визначено найбільш оптимальний підхід щодо класифікації активів, проведено оцінку інвестиційних якостей агрегованих на класи та підкласи активів на основі фінансових інструментів, що їх репрезентують, проаналізовано відмінності між активними та пасивними стратегіями управління інвестиційним портфелем та їх недоліки. В другому розділі проаналізовано існуючі системи управління інвестиційним портфелем, проведено регресійний аналіз факторів впливу на динаміку ак

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Kartha, Satish Chandrashekhar. "Active, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipes." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31156.

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The coupled nature of vibrational energy flow in fluid filled piping systems makes its control and subsequent reduction a difficult problem. This work experimentally explores the potential of different active, passive and active/passive control methodologies for control of vibrational power flow in fluid filled pipes. Circumferential modal decomposition and measurements of vibrational power carried by individual wave types were carried out experimentally. The importance of dominant structural bending waves and the need to eliminate them in order to obtain meaningful experimental results has be

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Hassan, Samy Aly. "Fundamental studies of passive, active and semi-active automotive suspension systems." Thesis, University of Leeds, 1986. http://etheses.whiterose.ac.uk/2691/.

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The fundamental properties of various automotive suspension systems are theoretically investigated on the basis of simple vehicle models subjected to realistic inputs chosen to represent road surfaces of different qualities. The vehicle response is evaluated through a performance index representing ride comfort, dynamic tyre load and suspension working space parameters, and interpreted in the light of these individual parameters together with the implications of the suspension design for attitude control and steering behaviour. Linear analysis procedures are followed in studying the passive, a

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Kim, Sangcheol. "Fabrication of active and passive terahertz structures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 60 p, 2006. http://proquest.umi.com/pqdweb?did=1203570961&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Garcia, Nil. "Optimization Methods for Active and Passive Localization." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/14192/1/garcia.pdf.

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Active and passive localization employing widely distributed sensors is a problem of interest in various fields. In active localization, such as in MIMO radar, transmitters emit signals that are reflected by the targets and collected by the receive sensors, whereas, in passive localization the sensors collect the signals emitted by the sources themselves. This dissertation studies optimization methods for high precision active and passive localization. In the case of active localization, multiple transmit elements illuminate the targets from different directions. The signals emitted by the tra

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Oh, Yim-Taek. "Passive and active drag of paralympic swimmers." Thesis, Manchester Metropolitan University, 2015. http://e-space.mmu.ac.uk/615953/.

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The aim of this thesis was to contribute to the development of an objective, evidence-based international classification system for para-swimmers by quantifying the effect of physical impairment on passive and active drag. The thesis comprises five studies. Study 1 identified a significant relationship between normalised passive drag and the para-swimmers’ International Paralympic Committee (IPC) Class, but an inconsistent difference in normalised passive drag between adjacent classes. High within-class variability in passive drag indicates that the current classification system does not alway

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Al-Mahmoud, Abdulrazzak M. "Microwave passive tunable and active bandpass filters." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309711.

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Campillo, Javier. "From Passive to Active Electric Distribution Networks." Doctoral thesis, Mälardalens högskola, Framtidens energi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-31592.

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Large penetration of distributed generation from variable renewable energy sources, increased consumption flexibility on the demand side and the electrification of transportation pose great challenges to existing and future electric distribution networks. This thesis studies the roles of several actors involved in electric distribution systems through electricity consumption data analysis and simulation models. Results show that real-time electricity pricing adoption in the residential sector offers economic benefits for end consumers. This occurs even without the adoption of demand-side manag

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Zhou, Shaoyi. "Advances in passive and active damping techniques." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI066.

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Les systèmes mécaniques (e.g. structures flexibles) sont généralement peu amortis, et par conséquent des vibrations de fortes amplitudes peuvent apparaitre. Il apparait nécessaire de développer des stratégies de contrôle vibratoire pour atténuer ces vibrations mécaniques. Cette thèse a pour objectif de développer plusieurs techniques d'amortissement de vibration passives ou actives. La première partie porte sur l'utilisation d'un “inerter” pour améliorer les performances de contrôle vibratoire de deux dispositifs existants, l'amortisseur à masse accordée (TMD) et deux TMDs placés en série (SDT

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Molander, Jonathan, and Loo Lennart van. "Active Versus Passive Investing : A Comparative Analysis." Thesis, Internationella Handelshögskolan, Jönköping University, IHH, Företagsekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49153.

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The increasing popularity of passive investment strategies causes the long-term feasibility of active investing to be questioned more often. Therefore, this research aimed to uncover whether active investors' influence on fund performance is positive and significant enough to offset the cost involved, thereby providing reasoning for active rather than passive investing. A comparative analysis of 211 actively managed funds and 191 market and industry-specific indices is performed. Security selection skills and market timing ability are captured through a model comprising of the Fama French thre

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SAXBY, DYANI J. "ACTIVE AND PASSIVE FATIGUE IN SIMULATED DRIVING." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1195507547.

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Watson, Rose E. (Rose Elliott). "Active or Passive Voice: Does It Matter?" Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc501082/.

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This thesis reports on the use of active and passive voice in the workplace and classroom through analysis of surveys completed by 37 employees and 66 students. The surveys offered six categories of business writing with ten sets of two sentences each, written in active and passive voice. Participants selected one sentence from each set and gave a reason for each selection. The participants preferred active over passive 47 to 46 percent of opportunities, but they preferred mixed voice over both, 49 percent. The participants preferred active only for memos to supervisors; in the other five cate

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Poon, Joyce Kai See Yariv Amnon. "Active and passive coupled-resonator optical waveguides /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-05242007-105741.

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Moore, Garrett Lee. "A Hybrid (Active-Passive) VANET Clustering Technique." Diss., NSUWorks, 2019. https://nsuworks.nova.edu/gscis_etd/1077.

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Clustering serves a vital role in the operation of Vehicular Ad hoc Networks (VANETs) by continually grouping highly mobile vehicles into logical hierarchical structures. These moving clusters support Intelligent Transport Systems (ITS) applications and message routing by establishing a more stable global topology. Clustering increases scalability of the VANET by eliminating broadcast storms caused by packet flooding and facilitate multi-channel operation. Clustering techniques are partitioned in research into two categories: active and passive. Active techniques rely on periodic beacon messag

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Svanberg, Mikaela, and Emilia Karlsson. "Active or Passive Fund Management : A comparison between active and passive Swedish funds before, during and after the financial crisis." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-75394.

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The essay investigates if there is a correlation between a funds management fee and return in relation to the risk that is taken by the investor. Furthermore, the essay examines if it is worth paying a higher fee for an actively managed fund compared to the lower fee for a passively managed fund. In addition, the essay will investigate whether the results differ before, during and after the financial crisis which took place between 2007 and 2009. To answer the questions 38 different Swedish equity funds, 33 active and five passive, are used. The funds are investigated using performance measure

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Kazemi, Alireza. "Mutual Fund Performance : Active- and Passive Fund Management." Thesis, Jönköping University, JIBS, Economics, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1226.

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<p>In this thesis I will examine active equity mutual fund managers’ ability to outperform an index, which is done by utilizing a sample of four equity mutual funds that mainly invest in large Swedish quoted companies. In order to measure the risk-adjusted performance of the funds, a model created by Michael Jensen will be used. Furthermore, I will investigate whether the managers of the mutual funds increase/decrease the risk level, or rather the beta, when the stock market is bullish/bearish. Hence, two time spans have been chosen, 2001-2003 and 2004-2006, where the previous represents a bea

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Karam, Philippe Chucri. "Modeling passive and active mechanisms in motoneuron dendrites." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13713.

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Sherwani, Hashir. "Resource management in active-passive multifunction radar networks." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10056926/.

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Despite the extensive research within the field of resource management in monostatic multifunction radar, the resource management techniques for a multifunction radar network are still in their infancy. More specifically, a network which has the ability to switch modes between monostatic and bistatic configuration may potentially be able to capitalise on the advantages of both configurations. This is a gap which has been identified and is the aim of this thesis to explore. The research within this thesis begins by exploring the advantages provided by a bistatic configuration over a monostatic

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Sousa, Júnior Gabriel Faria de. "Active versus passive management : the case of BOVESPA." Master's thesis, Instituto Superior de Economia e Gestão, 2016. http://hdl.handle.net/10400.5/11647.

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Mestrado em Finanças<br>O principal objetivo deste trabalho é analisar alguns modelos subjacente à gestão de carteiras ativa e passiva e qual seria seu impacto sobre a escolha de uma determinada carteira constituída por ações que estão integrados no índice BOVESPA, maior mercado bolsista do Brasil. A gestão passiva é baseada numa carteira que visa replicar o comportamento do Índice BOVESPA, tendo como base os preços históricos do índice e no método naïve (1/N), no qual composição da carteira inclui todos os ativos do índice com as mesmas proporções. A gestão ativa baseia-se no método de Mark

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Zhang, Zhaowei. "Passive and active Bragg gratings for optical networks." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/47760/.

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This thesis investigates fibre Bragg grating (FBG) devices. Specifically, it consists of the developments and applications of two groups of devices: the optical phase en/decoders and the tunable fibre Bragg gratings based on an S-bending technique. The advantage of an S-bending tuning FBG is that its central wavelength is invariant as the linear strain gradient along the FBG is altered. Two new devices are developed by embedding a pair of FBGs in a single uniform beam for S-bending. One is the tunable dispersion compensator with a wide tuning range, and the other is a tunable pure dispersion s

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Goldstein, Andre L. "Control of Sound Transmission with Active-Passive Tiles." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27913.

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Nowadays, numerous applications of active sound transmission control require lightweight partitions with high transmission loss over a broad frequency range and simple control strategies. In this work an active-passive sound transmission control approach is investigated that potentially addresses these requirements. The approach involves the use of lightweight stiff panels, or tiles, attached to a radiating base structure through active-passive soft mounts and covering the structure surface. The resulting double-partition configuration was shown to have good high frequency passive isolation, b

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Lam, Margaretha Johanna. "Hybrid Active/Passive Models with Frequency Dependent Damping." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30770.

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To add damping to structures, viscoelastic materials (VEM) are added to structures. In order to enhance the damping effect of the VEM, a constraining layer is attached, creating a passive constrained layer damping treatment (PCLD). When this constraining layer is an active element, the treatment is called active constrained layer damping (ACLD). Recently, the investigation of ACLD treatments has shown it to be an effective method of vibration suppression. In this work, two new hybrid configurations are introduced by separating the passive and active elements. In the first variation

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Ziolkowski, Richard W. "Passive and active metamaterial-inspired nano-scale antennas." IEEE, 2016. http://hdl.handle.net/10150/623141.

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A variety of open and closed multi-layered nanoparticle structures have been considered analytically and numerically for their use as scatterers and radiators. These include metamaterial-inspired structures based on dielectrics and metals excited by either plane waves or electric Hertzian dipoles at optical frequencies. Both passive and active (gain impregnated dielectric) materials have been considered. Enhanced and mitigated scattering and radiating effects have been modeled. Nano-antenna and nano-amplifier configurations for optical applications have been emphasized. A review of these model

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Huang, Caijin. "Optical nano-antennas : passive properties and active control." Thesis, Dijon, 2010. http://www.theses.fr/2010DIJOS011/document.

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Les nano-antennes optiques sont de nouveaux éléments, généralement métalliques, permettant d’améliorer les interactions électromagnétiques entre le rayonnement lumineux et un objet sub-longueur d’onde. Ces dispositifs innovants, fonctionnant dans une gamme de longueur d’onde correspondant au spectre visible et proche infrarouge, répondent à certaines contraintes inhérentes à l’optique lorsque les échelles d’interactions relèvent du nanomètre. En particulier, les propriétés des antennes optiques métalliques sont régies par l’apparition de résonances plasmons qui permettent, d’une part de confin

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BRADDE, TOMMASO. "Parameterized macromodeling of passive and active dynamical systems." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2970988.

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Rizzolo, Carlo <1992&gt. "Passive, Active and Sentiment based mean-variance allocation." Master's Degree Thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/10213.

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This thesis wants to concentrate on behavioral finance and in particular on the method used by investors to face the problem of risk and return in the capital market. The structure of the composition provides for the development of a theoretical analysis of the portfolio’s choice and of behavioral finance, in order to conduct a real empirical analysis of the model. Therefore, a portfolio of securities will be built, in which the performance is assessed with a passive management by applying Markowitz's portfolio theory at first, then with active management, and finally the impact of the behavio

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Zhou, Xuan. "Advances in hybrid plasmonics : from passive to active functions." Thesis, Troyes, 2013. http://www.theses.fr/2013TROY0015/document.

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La plasmonique hybride est un sujet d’actualité qui exploite des interactions physiques entre nano-objets métalliques et d’autres nanomatériaux. En bénéficiant des propriétés de chacun de leurs constituants, les nanostructures hybrides sont utilisées dans de nombreuses applications comme la détection d’espèces bio-chimiques. Dans cette thèse, nous présentons une nouvelle nanostructure hybride polymère/metal qui est non seulement utilisée comme nano-émetteur anisotrope qui s’avère aussi être un outil puissant de caractérisation du champ proche optique.La fabrication de cette nouvelle nanostruct

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Lindberg, Peter. "Wideband Active and Passive Antenna Solutions for Handheld Terminals." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7445.

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