Дисертації з теми "Controlling Election"
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ABOUEIMEHRIZI, MOHAMMAD. "Election Control via Social Influence." Doctoral thesis, Gran Sasso Science Institute, 2021. http://hdl.handle.net/20.500.12571/21656.
Повний текст джерелаTambone, Julia. "Are Donald Trump and Hillary Clinton Controlling the Stock Market? An Analysis of the 2016 Presidential Election's Impact on Stock Market Volatility." Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/scripps_theses/936.
Повний текст джерелаNegri, Carlotta. "Controlling electron transport : quantum pumping and single-electron tunneling oscillations." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14670/document.
Повний текст джерелаExploiting time-dependent effects to induce and control currents through mesoscopic and nano\-scopic conductors is a major challenge in the field of quantum transport. In this dissertation we consider two nanoscale systems in which a current can be induced through intriguing mechanisms of coupling between excitations by external fields and electron transport.We first study a quantum pumping problem, analyzing the possibility to induce a DC response to an AC parametric driving through a three-site system in a ring configuration. We are interested in particular in the crossover between adiabatic and antiadiabatic driving regimes and in the presence of dissipation, which is accounted for by coupling with an external bath. We show that for a clever choice of this coupling the dissipative model admits a full analytical solution for the steady state current valid at arbitrary frequency, which allows us to fully understand the pumping-frequency dependence of the induced current. We then focus on a different current-controlling scheme exploiting the phenomenon of single-electron tunneling oscillations (SETOs). In this case, opposite to what happens for pumping, an AC effect, an almost periodic current of single electrons, arises through a tunnel junction circuit as a consequence of a DC bias. We study the zero-temperature noise spectrum of a tunnel junction in different resistive environments with the aim to determine the boundaries of the SETOs regime and quantify their quality in terms of periodicity. We then discuss the finite-temperature generalization and the possibility to account for the effects of quantum fluctuations
Blair, Amber Dawn. "Controlling electron transfer at sensitized TiO₂ surfaces." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52946.
Повний текст джерелаScience, Faculty of
Chemistry, Department of
Graduate
Murdia, Chitraang. "Controlling light emission with shaped electron wavefunctions." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120216.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 65-67).
The extent to which can one change the nature of spontaneous emission from a free electron by shaping the its wavefunction has been a long-standing question. In this work, we use both a semi-classical formalism and a QED formalism to show that Bremsstrahlung radiation can be tailored by altering the electron superposition states. Using the semi-classical formalism, we show that wavefunction shaping can greatly enhance the collimation of radiation from electron beams passing through spatially periodic electromagnetic fields, such as those in undulators. Moreover, the radiation from rapidly decelerated shaped electrons can be made directional and monochromatic. Using the QED formalism, we show that the radiation can be markedly different from an incoherent sum of the radiations of the two states because of interference between the scattering amplitudes from the two components of the superposition. The ability to control free electron spontaneous emission via interference may eventually result in a new degree of control over radiation over the entire electromagnetic spectrum in addition to the ability to deterministically introduce quantum behavior into normally classical light emission processes.
by Chitraang Murdia.
S.B.
Stano, Peter. "Controlling electron quantum dot qubits by spin-orbit interactions." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=983802254.
Повний текст джерелаOlshansky, Lisa. "Kinetics and dynamics controlling proton-coupled electron transfer in ribonucleotide reductase." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101552.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
Proton-coupled electron transfer (PCET) reactions comprise a fundamental mechanism for energy transduction in nature. In catalyzing the conversion of ribonucleotides to deoxyribonucleotides, ribonucleotide reductase (RNR) performs reversible, long-range PCET over a pathway of redox active amino acids ([beta]-Y₁₂₂ >/< [beta]-Y₃₅₆ >/< [alpha]-Y₇₃₁ >/< [alpha]-Y₇₃₀ >/< [alpha]-C₄₃₉) that spans ~35 Å and two subunits. As such, RNR serves as a paradigm for the study of PCET in biology. Subunit interaction dynamics, examined by fluorescence spectroscopy, exposed mechanisms underlying allosteric control over PCET and contributed to an expanded kinetic model for turnover. Trapped meta-stable states of the active [alpha]₂[beta]₂ complex are dictated by the translocation of a single charge and attenuate dissociation 10⁴-fold. These trapped states were leveraged to resolve the stoichiometric distribution of the Y¹²²* cofactor from its ensemble average of 1.2 Y*/[beta]₂ , revealing that [beta]₂ contain either 2 or 0 Y*. Circumventing rate-limiting conformational changes that gate turnover, photoinitiated RNRs were prepared to allow photochemically driven Y₃₅₆ oxidation, and spectroscopic resolution of the ensuing reactivity. A series of photoRNRs containing unnatural FnYs (n = 2-3) and W in place of [beta]-Y₃₅₆ were prepared. All of these photo[beta]₂s give rise to transient absorption (TA) spectra consistent with their oxidized forms and undergo photochemically driven turnover. Time-resolved emission spectroscopy allowed examination of ET kinetics as a function of driving force within the [alpha]/[beta] subunit interface. Marcus-inverted kinetics were observed, providing reorganization and electronic coupling energies. Comparing ET and PCET kinetics as a function of pH, buffer concentration, oligomeric state, and buffer isotopic composition revealed new insights into biological control over PCET reactions and implicate a role of [alpha]₂ in facilitating proton transfer from [beta]-Y₃₅₆ Single wavelength TA kinetics provided direct measure of the rate constant for PCET through a, assignment of the rate-determining step as 3'-C-H bond cleavage by C₄₃₉ , and a lower bound of 7 for the associated 1° KIE. The pKa of proton acceptor(s) at the subunit interface, and the relative energies of individual radical intermediates were determined, revealing matched tuning to the surrounding environment and highlighting the subtlety of precision control underlying RNR catalysis.
by Lisa Olshansky.
Ph. D.
Kender, William Theodore. "Controlling Excited State Electron Delocalization via Subtle Changes to Inorganic Molecular Structures." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534271989190317.
Повний текст джерелаCoote, Tashni-Ann. "Substituent Effects on Exchange Coupling: Controlling the Interactions between Unpaired Electrons." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-02282007-131000/.
Повний текст джерелаKling, Nora G. "Controlling the dynamics of electrons and nuclei in ultrafast strong laser fields." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/16821.
Повний текст джерелаDepartment of Physics
Itzik Ben-Itzhak
One ultimate goal of ultrafast, strong- field laser science is to coherently control chemical reactions. Present laser technology allows for the production of intense (>10[superscript]13 W/cm[superscript]2), ultrashort ( 5 fs), carrier-envelope phase-stabilized pulses. By knowing the electric field waveform, sub-cycle resolution on the order of 100's of attoseconds (1 as=10[superscript]-18 s) can be reached -- the timescale for electron motion. Meanwhile, the laser field strengths are comparable to that which binds electrons to atoms or molecules. In this intense-field ultrashort-pulse regime one can both measure and manipulate dynamics of strong-field, quantum-mechanical processes in atoms and molecules. Despite much progress in the technology, typical durations for which lasers can be reliably locked to a specific carrier-envelope phase ranges from a few minutes to a few hours. Experiments investigating carrier-envelope phase effects that have necessarily long data acquisition times, such as those requiring coincidence between fragments originating from the same atom or molecule, are thus challenging and uncommon. Therefore, we combined the new technology for measuring the carrier-envelope phase of each and every laser shot with other single-shot coincidence three-dimensional momentum imaging techniques to alleviate the need for carrier-envelope phase stabilized laser pulses. Using phase-tagged coincidence techniques, several targets and laser-induced processes were studied. One particular highlight uses this method to study the recollision process of non-sequential double ionization of argon. By measuring the momentum of the two electrons emitted in the process, we could study their energy sharing. Furthermore, by selecting certain carrier-envelope phase values, and therefore laser pulses with a particular waveform, events with single recollision could be isolated and further analyzed. Another highlight is our studies of carrier-envelope phase effects in the dissociation of the benchmark H[subscript]2[superscript[+] ion beam. Aided by near-exact quantum mechanical calculations, we could identify interfering pathways which lead to the observed spatial asymmetry. These and other similar experiments are described in this thesis as significant steps toward their ultimate control.
Walker, Shawn W. "Modeling, simulating, and controlling the fluid dynamics of electro-wetting on dielectric." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7357.
Повний текст джерелаThesis research directed by: Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Folkes, Robert L. "Controlling the morphological and electro-optical properties of polymer dispersed liquid crystals." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/3669/.
Повний текст джерелаKim, Chang Sub Ph D. Massachusetts Institute of Technology. "Controlling and understanding electro-chemo-mechanical properties of layered cuprate thin films." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122074.
Повний текст джерелаThesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 98-100).
Surface exchange kinetics are a key indicator of performance for electrochemical devices including solid oxide fuel cells. Due to broad flexibility in dopant selection and concentration, mixed ionic-electronic conducting (MIEC) ABO₃ perovskite oxides have been extensively explored as model systems to understand oxygen surface exchange kinetics for solid oxide fuel cell (SOFC) electrodes. Traditionally, transport properties are examined as functions of type and concentration of aliovalent cations, requiring multiple samples, resulting in changes in multiple characteristics and properties, often unintended. Moreover, the perovskite oxides generally accommodate only oxygen vacancies and not interstitials.
In this study, the type and concentration of ionic defects (oxygen vacancies vs interstitials) in MIEC layered cuprates (La₁.₈₅Ce₀.₁₅CuO₄) are systematically controlled, without change in cation doping or electronic conductivity, by electrochemical pumping of oxygen with and are analyzed through chemical capacitance, defect chemical modelling, and electrical conductivity. Oxygen surface exchange kinetics derived from electrochemical impedance spectra show a strong correlation with oxygen defect concentration increase, for both vacancies and interstitials. Key thermodynamic parameters, such as band gap energy (0.54±0.10 eV) and anion Frenkel enthalpy (0.618±0.074 eV) are derived. Evidence of oxygen vacancy ordering is observed from chemical capacitance analysis. Layered cuprates have multiple crystalline structure types - namely T, T*, and T' - which share similar chemistry, but are known to have different properties, such as oxygen diffusivities.
Control of structure is systematically studied by using different substrates and seed layers, and by electrochemical pumping of oxygen. A dynamic and reversible structural change in layered cuprate thin films is discovered, for the first time, by oxygen nonstoichiometry control. Oxygen diffusivities of T and T' structures with the same cation chemistry (La₂CuO₄) are measured, for the first time, by oxygen isotope exchange experiment. The T-structured layered cuprate shows faster oxygen diffusion, but with higher activation compared to the T' variant. On the other hand, faster oxygen surface exchange kinetics exhibited by the T'- as compared to the T- type structured cuprate, as measured by thin film conductivity relaxation, is attributed to a lower enthalpy of oxygen interstitial formation.
by Chang Sub Kim.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Materials Science and Engineering
Wang, He. "From few-cycle femtosecond pulse to single attosecond pulse-controlling and tracking electron dynamics with attosecond precision." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/4393.
Повний текст джерелаDepartment of Physics
Zenghu Chang
The few-cycle femtosecond laser pulse has proved itself to be a powerful tool for controlling the electron dynamics inside atoms and molecules. By applying such few-cycle pulses as a driving field, single isolated attosecond pulses can be produced through the high-order harmonic generation process, which provide a novel tool for capturing the real time electron motion. The first part of the thesis is devoted to the state of the art few-cycle near infrared (NIR) laser pulse development, which includes absolute phase control (carrier-envelope phase stabilization), amplitude control (power stabilization), and relative phase control (pulse compression and shaping). Then the double optical gating (DOG) method for generating single attosecond pulses and the attosecond streaking experiment for characterizing such pulses are presented. Various experimental limitations in the attosecond streaking measurement are illustrated through simulation. Finally by using the single attosecond pulses generated by DOG, an attosecond transient absorption experiment is performed to study the autoionization process of argon. When the delay between a few-cycle NIR pulse and a single attosecond XUV pulse is scanned, the Fano resonance shapes of the argon autoionizing states are modified by the NIR pulse, which shows the direct observation and control of electron-electron correlation in the temporal domain.
Borgström, Magnus. "Controlling Charge and Energy Transfer Processes in Artificial Photosynthesis : From Picosecond to Millisecond Dynamics." Doctoral thesis, Uppsala University, Department of Physical Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6017.
Повний текст джерелаThis thesis describes an interdisciplinary project, where the aim is to mimic the initial reactions in photosynthesis. In photosynthesis, the absorption of light is followed by the formation of charge-separated states. The energy stored in these charge-separated states is further used for the oxidation of water and reduction of carbon dioxide. In this thesis the photo-induced processes in a range of supramolecular complexes have been investigated with time resolved spectroscopic techniques. The complexes studied consist of three types of units; photosensitizers (P) capable of absorbing light, electron acceptors (A) that are easily reduced and electron donors (D) that are easily oxidised. Our results are important for the future design of artificial photosystems, where the goal is to produce hydrogen from light and water.
Two molecular triads with a D-P-A architecture are presented. In the first one, a photo-induced charge-separated state was formed in an unusually high yield (φ>90%). In the second triad, photo-irradiation led to the formation of an extremely long-lived charge-separated state (τ = 500 ms at 140K). This is also the first synthetically made triad containing a dinuclear manganese unit as electron donor.
Further, two sets of P-A dyads are presented. In both, the expected photo-induced reduction of the electron acceptor is diminished due to competing energy transfer to the triplet state of the acceptor.
Finally, a P-P-A complex containing two separate photosensitizers is described. The idea is to produce high-energy charge-separated states by using the energy from two photons.
Schuetze, Matthew P. (Matthew Paul). "Controlling a field test electron beam-generated plasma system for the decomposition of chlorinated volatile organic compounds in air streams." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28109.
Повний текст джерелаMaigné, Alan. "Caractérisation et modélisation par microscopie électronique en transmission à balayage (STEM) et spectroscopie de perte d’énergie d’électrons (EELS) de « nanohorns » de carbone monofeuillet fonctionnalisés pour des applications pharmaceutiques Review of recent advances in spectrum imaging and its extension to reciprocal space Revealing the Secret of Water-Assisted Carbon Nanotube Synthesis by Microscopic Observation of the Interaction of Water on the Catalysts Role of Subsurface Diffusion and Ostwald Ripening in Catalyst Formation for Single-Walled Carbon Nanotube Forest Growth Effect of hole size on the incorporation of C60 molecules inside single-wall carbon nanohorns and their release Adsorption Phenomena of Tetracyano-p-quinodimethane on Single-Wall Carbon Nanohorns Carbon Nanohorns as Anticancer Drug Carriers Effect of Functional Groups at Hole Edges on Cisplatin Release from Inside Single-Wall Carbon Nanohorns Optimum Hole-Opening Condition for Cisplatin Incorporation in Single-Wall Carbon Nanohorns and Its Release Functionalization of Carbon Nanohorns with Azomethine Ylides: Towards Solubility Enhancement and Electron-Transfer Processes Aqueous carbon nanohorn–pyrene–porphyrin nanoensembles: Controlling charge-transfer interactions Photoinduced Electron Transfer on Aqueous Carbon Nanohorn–Pyrene– Tetrathiafulvalene Architectures Soluble Functionalized Carbon Nanohorns." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS600.
Повний текст джерелаIn this manuscript, we will expose the characterization and modelling of Single Wall Nanohorns (SWNH) and Nanotube Forests by analytical microscopy and the functionalization of SWNH for drug delivery applications. Firstly, we will introduce the microscopy and spectroscopy methods used for our experiments. We will then study the growth process of Single Wall Carbon Nanotubes (SWCNT) forests (within the framework of a collaboration with AIST, Japan). SWCH, their structure, modifications and filling properties will be analysed in details. An original method will be presented to study the porosity of inorganic material with EELS. Ab initio calculation will also be used to explore the effect of the defects present in the SWNH wall on the oxidation and filling process. We will study the potentialities of Single Wall Carbon nanohorns as Drug Delivery Systems and particularly as anticancer drug carriers
Сістук, Володимир Олександрович, Владимир Александрович Систук та Volodymyr O. Sistuk. "Підвищення показників маневреності кар’єрних самоскидів з електромеханічною трансмісією". Thesis, Друкарня ФОП Щербенюк С. Г, 2014. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/2267.
Повний текст джерелаUK: АНОТАЦІЯ Дисертацію присвячено підвищенню показників маневреності кар’єрних самоскидів з електромеханічною трансмісією. Вперше науково обґрунтовано можливість та доцільність застосування примусового управління обертанням задніх ведучих коліс кар’єрного самоскида з електромеханічною трансмісією, що дозволяє їм виконувати маневри із використанням силового довороту. Вперше розроблено математичну модель силового довороту, яка дозволяє визначити відношення кутових швидкостей задніх ведучих коліс окремо правого і лівого борту машини і її показники маневреності відповідно до коефіцієнта зчеплення на основі вперше встановлених аналітичних залежностей. Аналітична залежність відношення кутових швидкостей задніх ведучих коліс від коефіцієнта зчеплення доведена методом лабораторного експерименту на створеній лабораторній моделі, яка дозволяє моделювати процес виконання маневру колісною машиною при різних способах повороту. Створено алгоритм примусового управління обертанням задніх коліс кар’єрного самоскида, оснащеного електромеханічною трансмісією. Відповідно до розробленого алгоритму управління виготовлено електронний блок, який разом із додатковою датчиковою апаратурою, що встановлюється на кар’єрний самоскид БелАЗ-7513В, представляє собою систему примусового управління поворотом.
RU: АННОТАЦИЯ Диссертация посвящена вопросу улучшения маневренности карьерных самосвалов с электромеханической трансмиссией для повышения эффективности их работы в стесненном пространстве рабочих зон глубоких карьеров. В работе проведен комплекс теоретических, лабораторных, промышленных исследований маневренности карьерных самосвалов с электромеханической трансмиссией при выполнении маневров с применением силового доворота. Разработана математическая модель силового доворота колесной машины. Впервые установлена аналитическая зависимость отношения угловых скоростей задних ведущих колес отдельно правого и левого борта от коэффициента сцепления, которая позволяет разработать рациональный алгоритм принудительного управления вращением задних колес карьерного самосвала. Впервые установлены аналитические зависимости, позволяющие определить показатели маневренности колесной машины на основе требуемого отношения угловых скоростей задних ведущих колес. Математическое моделирование с использованием разработанной модели позволило установить, что для карьерного самосвала БелАЗ-7513 минимальный радиус поворота в сложных условиях эксплуатации (на увлажненном грунтовом покрытии основных трасс с коэффициентом сцепления φ=0,34) при выполнении маневра с использованием силового доворота может быть уменьшен с 13,0 до 10,1 м. Установленные математические зависимости проверены экспериментальным путем с применением лабораторной модели, созданной в соответствии с масштабным коэффициентом, равным 12,0, в качестве которого выступало отношение радиуса колеса карьерного самосвала к радиусу колеса модели. Лабораторная модель позволяет моделировать процесс выполнения маневра колесной машиной при различных способах поворота путем принудительного воздействия на частоты вращения электродвигателей задних колес. Разработан и реализован на карьерном самосвале БелАЗ-7513В в условиях ПАО «Центральный ГОК» алгоритм принудительного управления вращением задних колес карьерного самосвала с электромеханической трансмиссией. Отклонение между расчетным 100 % (1,12 м) минимальным радиусом поворота лабораторной модели и полученным в результате эксперимента составило 10,7 % (1,0 м), отклонение между расчетным 100% (10,38 м) минимальным радиусом поворота карьерного самосвала и полученным путем промышленных испытаний составило 7,9 % (11,30 м), что подтвердило соответствие аналитических и экспериментальных показателей. Использование системы принудительного управления поворотом на карьерных самосвалах с электромеханической трансмиссией позволяет повысить техническую производительность машин на 6,1 % путем уменьшения времени их маневрирования до 1,4 мин, установленного с помощью хронометража в промышленных условиях, а также позволяет снизить топливо-энергетические затраты на 2,3 %. Материалы диссертационных исследований приняты на предприятиях ПАО «Центральный ГОК», ПАО «АрселорМиттал Кривой Рог» и ООО «Кривбасс-БелАЗ-Сервис СП». Расчетный экономический эффект в условиях ПАО «АрселорМиттал Кривой Рог», полученный за счет повышения производительности карьерных самосвалов БелАЗ-7513 на 5,9%, для существующего парка из 8 машин составил 678,0 тыс. грн. / год. Таким образом, впервые научно обоснованы возможность и целесообразность применения принудительного управления вращением задних ведущих колес карьерного самосвала с электромеханической трансмиссией при маневрировании, что обеспечивает уменьшение радиуса поворота машины, повышая производительность промышленного автотранспорта карьеров.
EN: THE SUMMARY The thesis is dedicated to increasing of open pit trucks with electrical transmission indices of maneuverability. For the first time there has been scientifically grounded possibility and suitability of usage of forced controllability of rear leading wheels of open pit truck with electrical transmission that enables them to carry out maneuvers with the usage of a forced additional turn. For the first time there has been worked out mathematical model of a forced additional turn which enables to determine a correlation of angular velocity of rear leading wheels of starboard and port sides of a car and its indices of maneuverability relative to a friction coefficient on the basis of firstly determined analytical dependence. Analytical dependence of relation of rear leading wheels angular velocity to a friction coefficient has been proved with laboratory experiment method on a created laboratory model which enables to simulate the process of a wheel vehicle maneuver performing with various means of a turn. An algorithm of a forced controlling of rear wheels rotation of open pit truck with electrical transmission has been created. In accordance with the created algorithm an electrical block which coupled with additional sensor equipment that is installed on a pit truck BelAZ-7513B representing a forced turn controlling system has been manufactured.
Криворізький національний університет
LIU, CHUN-TING, and 劉俊廷. "Boards Re-election, Controlling Shareholdings, and The Voluntary Adoption of Electronic Voting." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/13907879857266013574.
Повний текст джерела國立雲林科技大學
會計系
104
This study examines the effect of board of director’s re-election and controlling shareholdings on the listed firms’ voluntary adopting electronic voting. Firstly, this study conjectures that a firm’s incentive to voluntarily adopt electronic voting decreases in the directors and supervisors election year. Secondly, the higher ownership hold by the control shareholders is expected to be positively associated with voluntary adopting electronic voting regulation in the shareholdings’ meeting. Using the data of listed firms in Taiwan during 2012~2014, this empirical results show that the voluntarily adopt electronic voting is positively associated with higher controlling shareholdings, yet, the possibility of voluntarily adopt electronic voting decreases in the board of director’s re-election year. The study implements some diagnostic checks and reveals the empirical results are robust to various specifications. Keywords: Electronic Voting, Board Re-election, Controlling Shareholdings
Coote, Tashni-Ann. "Substituent effects on exchange coupling controlling the interactions between unpaired electrons /." 2006. http://www.lib.ncsu.edu/theses/available/etd-02282007-131000/unrestricted/Coote.pdf.
Повний текст джерелаStano, Peter [Verfasser]. "Controlling electron quantum dot qubits by spin-orbit interactions / vorgelegt von Peter Stano." 2007. http://d-nb.info/983802254/34.
Повний текст джерелаFu, Chung-I., and 傅中奕. "Controlling an Omni-direction Wheelchair by Using Electro-oculography (EOG) Signals." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8ydpkd.
Повний текст джерела中原大學
電機工程研究所
102
With the increasing proportion of Taiwan’s elderly population year by year, the society has gradually marched toward an ageing society. Especially, the problem of disability for the elderly has greatly burdened the economics costs. In this study, I initiate the eye movement signals for offline feature identification, and the appropriate threshold voltage is selected through repeated experiments. In additional, through transmitting the control commands to the Arduino platform, we can change the moving directions of the omni-directional wheelchair. Finally, the experimental results show that, the omni-directional wheelchair moves accurately in the direction of where the users want to go.
Li, Ling-Ru, and 李伶如. "Improving Organic Thin-Film Transistor Performance by Controlling the Orientation of Solution-Processible Microcrystallites and Doping with Electron Acceptor." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36513298492472689239.
Повний текст джерела國立清華大學
化學系
99
In the thesis, we detail the progress made in improving the thin films of 2,8-difluoro-5,11-bis (triethylsilylethynyl) anthradithiophene (diF-TESADT) for high mobility OFET application. In part (I) experiment, different post-annealing methods were used to improve the organic thin film structure. Morphology, structure, and crystallinity of diF-TESADT films are of particular concern and investigated by combined techniques of atomic force microscopy (AFM), grazing-incidence x-ray diffraction (GIXD), and near-edge x-ray absorption fine structure (NEXAFS) spectroscopy. The diF-TESADT films produced from spin-coating exhibit wheat-like features and GIXD data reveal the presence of both (001)- and (111)-oriented crystallites on the surface. Despite the mixed orientation, as-grown diF-TESADT can still produce OFET with a best mobility of 0.37 cm2V-1 s-1. Improvement in film quality is achieved by employing solvent annealing followed by thermal annealing. The resultant diF-TESADT films exhibit smooth, plate-like features, and GIXD data show a complete structural transformation to (001)-oriented crystallite, a much favored structure for efficient hole transport. The highest OFET mobility reaches 2.70 cm-1V-1s-1, with the median mobility averaged over 15 devices equal to 1.4 cm-1V-1s-1. In part (II) experiment, we used the strong electron-acceptor 2,3,5,6-tetrafluoro- 7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), as a dopant in diF-TESADT thin film to improve the charge transfer properties. We investigated how the energy levels of organic semiconducting thin films of diF-TESADT change with the F4-TCNQ dopant concentration with ultraviolet photoemission spectroscopy (UPS) and x-ray photoemission spectroscopy (XPS). The results showed that the shift the energy level of diF-TESADT -0.3 eV. The effect of solvent vapor annealing on the morphology and device performance of thin films was also investigated. When molar dopant ratio of reaches 0.37%, the unvanished plate-like features give a small degradation of mobility but the devices averaged threshold voltage shifts from 21.3 V to 1.47 V. We concluded the dramatic VTH variation is presumably due to the structure reorganization of thin film when post annealing. As a consequence, F4-TCNQ effectively neutralized the residual dipoles at the interface between semiconductor layer and the dielectric substrate.
Janse, van Vuuren Gary Peter. "Controlling the feedrate of material from a vibratory pipe conveyor using an electro-magnetic vibrator and load cell system." Thesis, 1994. http://hdl.handle.net/10321/2838.
Повний текст джерелаThis work presents a novel way of controlling the feed rate of raw material from a vibratory pipe feeder system. The system consists of a hopper, feeder pipe, electromechanical vibrator and a loadcell which measures the mass of the complete system. Raw material is gravity fed onto the vibrating pipe whose amplitude of vibration controls the amount of material fed.
M
Hänelt, Inga. "The role of the M2C region of the K+ translocating subunit KtrB of the Ktr system of Vibrio alginolyticus." Doctoral thesis, 2010. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201009306574.
Повний текст джерела