Tesis sobre el tema "Symmetric and Asymmetric supercapacitor"
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Liu, Chang. "Polyaniline and Graphene Based Symmetric and Asymmetric Solide-State Supercapacitor". University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1429622924.
Texto completoBona, Claudine M. "Symmetric and asymmetric hybridization in citrus spp". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1326.
Texto completoMarkesjö, Erik. "Different Replicator Equations in Symmetric and Asymmetric Games". Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256172.
Texto completoLuehe, Karl von der. "Câ‚-symmetric phosphine-phospholane ligands for asymmetric hydrogenation". Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430205.
Texto completoAxe, Philip. "Pseudo-C3-symmetric titanium complexes for asymmetric catalysis". Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512296.
Texto completoTkaczyk, Karen McMillan. "Studies towards asymmetric hydroboration with C₂ symmetric dithiols". Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.625077.
Texto completoLee, Jee Hea. "Authenticated encryption in the symmetric and asymmetric settings /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3022195.
Texto completoHerrero, Antón Rosa. "Hybrid methodologies for symmetric and asymmetric vehicle routing problems". Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/369581.
Texto completoOver the last decades, globalization has driven the adaptation of the Transport and Logistics sector to new social demands. At the same time, transport has been the backbone of globalization. This social need creates ambitious consumers who need their products quickly and an affordable price often unaware of their origin, transport mode or environmental aspects, among other factors. Nevertheless, to satisfy customer demands, it is needed to find the cheapest transport mode, which in turn means the improvement of transport logistics of the products. Therefore, these demands require an increasingly flexible service to meet customer requirements, and in addition companies want an efficient and productive transport. The so called Traveling Salesman Problems (TSP) and Vehicle Routing Problems (VRP) provide the theoretical framework for approaching this class of logistic problems associated with the physical distribution of goods from a central depot to customers. They are two of the most challenging and researched problems because of their complexity and applicability. The main goal of this PhD thesis is to introduce hybrid methodologies that integrate several techniques to efficiently solve rich VRPs with realistic constraints. It starts with theoretical problems and evolves into more realistic scenarios tackling six combinatorial problems related to road transport. A metaheuristic named Tailored Lagrangian Metaheuristic (TLM) has been developed to tackle the TSP. It is based on the Lagrangian Relaxation which is used to exploit the structure of the problem reducing considerably its complexity by moving hard-to-satisfy constraints into the objective function, associating a penalty in case the constraints are not satisfied. The developed metaheuristic for the TSP has been integrated into two hybrid methodologies combined with Constraint Programming to tackle more complex problems. First of all, it is addressed the Capacitated Vehicle Routing Problem (CVRP), whose vehicles have limited loading capacity of the goods that must be delivered. Secondly, it has been addressed a real problem of the Home Health Care (HHC) service in the municipality of Ferrara, Italy. It consists on assigning patients' services to nurses which travel to each patient’s home. Theoretical researches typically assume the symmetry of the distance-based costs associated with traveling from one place to another as well as the existence of a homogeneous fleet of vehicles with limited capacity. This thesis studies different variants focusing on the impact that causes the asymmetry of the costs and the heterogeneity of the fleet. For these purpose, the Asymmetric Traveling Salesman Problem (ATSP), the Asymmetric Capacitated Vehicle Routing Problem (ACVRP) and the Asymmetric and Heterogeneous Vehicle Routing Problem (AHVRP) are addressed.
Polak, Malwina Maria y Marcelina Polak. "Modeling exchange rate using symmetric and asymmetric GARCH models". Thesis, KTH, Matematisk statistik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195824.
Texto completoSyftet med uppsatsen är att studera modeller av GARCH-typ, och fokus ligger på att anpassa GARCH-modeller efter växelkurstidsserier. Den symmetriska GARCH(1,1)-modellen jämförs med den asymmetriska EGARCH(1,1)-modellen. Modellerna analyseras för olika fördelningar, såsom normal- och t-fördelning, på avkastningarnas brustermer. För att estimera parametrarna används maximum likelihood-metoden. Modellens prestanda bedöms sedan utifrån AIC- och BIC-kriterierna. Studien är baserad på daglig data från fyra valutapar under perioden 2002 till 2015. Resultaten indikerar att den asymmetriska GARCH-modellen förbättrar estimeringen generellt sett. Genom att använda tjocksvansade fördelningar finner man att persistensen minskar. EGARCH-modellen fångar dessutom upp asymmetrier i avkastningarna, på så sätt att volatiliteten ökar mer vid "goda nyheter" än vid "dåliga nyheter".
Tenny, Roy. "Symmetric and asymmetric secure communication schemes using nonlinear dynamics /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3099554.
Texto completoRafezy, Behzad. "Global vibration analysis of symmetric and asymmetric high rise buildings". Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55960/.
Texto completoLuo, Yunfei. "Chemoenzymatic synthesis of C2 symmetric chiral dienes for asymmetric catalysis". Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539483.
Texto completoClark, Kylen D. "A Numerical Comparison of Symmetric and Asymmetric Supersonic Wind Tunnels". University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447071393.
Texto completoDoughty, Jeffrey Jon. "Symmetric Near-Field Probe Design and Comparison to Asymmetric Probes". PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/390.
Texto completoWong, Wilson Wai Shun. "A CDMA based hybrid wireless architecture for symmetric and asymmetric communications". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ53726.pdf.
Texto completoLo, Michael Man-chu 1971. "Applications of C₂-symmetric bis(azaferrocenes) in asymmetric copper-catalyzed reactions". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8359.
Texto completoVita.
Includes bibliographical references.
Based on a strategy developed in our group for the desymmetrization of planar heterocycles, we have designed, synthesized, and resolved a number of bidentate, C2-symmetric planar-chiral bis(azaferrocenes) that bear a structural resemblance to the highly versatile bis(oxazolines). These bis(azaferrocenes) have their stereogenic elements directly connected to their ligating atoms, which should help these heterocycles exert better stereodifferentiating ability when they are applied as ligands in metal-catalyzed processes. To validate the ligand design, we first applied our C2-symmetric bis(azaferrocenes) as ligands in the asymmetric copper-catalyzed cyclopropanation of olefins. We discovered that one of these ligands is particularly effective, and using a hindered diazo ester, an array of monosubstituted olefins has been cyclopropanated with excellent diastereo- as welf as enantioselectivity. The level of stereoselection achieved is comparable to some of the best ligands reported to date. Preliminary studies also showed that trans and trisubstituted olefins can be excellent substrates for the ligand. The same copper-bis(azaferrocene) complex also catalyzes the ring expansion of oxetanes into tetrahydrofurans with high stereoselection. In the optimization process, we have developed a new hindered diazo ester that may also prove useful in other asymmetric carbene transfer processes. With the catalyst controlling the stereochemistry of the newly established C2 carbon and the oxetane substrate defining the configuration at the C3 carbon, the ring expansion furnishes either diastereomer of a 3-substituted tetrahydrofuran-2-carboxylate with high stereoselectivity.
(cont.) The Kinugasa reaction, which is the copper-mediated reaction between nitrones and terminal alkynes, is an underexplored synthetic pathway to 2-azetidinones. Using a bis(azaferrocene) as the ligand, we have successfully improved the Kinugasa reaction in the following aspects: (1) the reaction is catalytic in copper; (2) the reaction gives high cis diastereoselectivity; and, (3) the reaction is highly enantioselective with a variety of nitrones and alkynes. Combined with a subsequent epimerization, our enantioselective process represents the first general, catalytic system for the Kinugasa reaction, which provides stereoselective access to all four of the possible isomers.
by Michael Man-chu Lo.
Ph.D.
Zhang, Yingxin. "Symmetric signaling by an asymmetric 1 erythropoietin : 2 erythropoietin receptor complex". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45211.
Texto completoIncludes bibliographical references (p. 43-46).
One erythropoietin molecule binds asymmetrically to two identical receptor monomers via erythropoietin site 1 and site 2, although it is unclear how asymmetry affects receptor activation and signaling. Here we report the computational design and experimental validation of two mutant erythropoietin receptors: one that binds only to erythropoietin site 1 but not site 2, and one that binds only to site 2 but not site 1. Expression of either mutant receptor alone in Ba/F3 cells cannot elicit a signal in response to erythropoietin, but when co-expressed, there is a proliferative response and activation of the JAK2 Stat5 signaling pathway. A truncated erythropoietin receptor with only one cytosolic tyrosine (Y343), on only one receptor monomer is sufficient for signaling in response to erythropoietin, regardless of the monomer on which it is located. The same results apply to having only one conserved juxtamembrane hydrophobic L253 or W258 residue, essential for JAK2 activation, in the full-length receptor dimer. We conclude that despite asymmetry in the ligand-receptor dimer interaction, both sides are competent for signaling, and we suggest that the receptors signal equally.
by Yingxin Zhang.
M.Eng.
Montag, Peter Katsumi. "Modeling the formation of current sheets in symmetric and asymmetric reconnection". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119927.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 103-109).
In this thesis we investigate the nature of magnetic reconnection using analytic and numerical methods. We consider configurations which are symmetric across the reconnection layer relevant to the Earth magnetotail, as well as configurations asymmetric in density and temperature across the reconnection layer, important to reconnection in Earth's dayside magnetopause. We develop an analytic model for the evolution of the electron phase space distribution function based on adiabatic invariants. We then apply this two model problems-Fermi acceleration and electron trapping-to extend previous results in these areas and model their effects on parallel heating. Following this, we run a battery of simulations of reconnection using particle in cell (PIC) codes at several different values of density asymmetry and guide field. These simulations reveal a number of regimes of current sheet formation, all of which are associated with significant anisotropic heating. Finally, we take a closer look at the case of antiparallel reconnection, where small levels of asymmetry cause significant shortening in the current sheet that develops at the midplane. Analysis of the data suggests an asymmetry in the firehose condition is the cause. Running another battery of simulations that adds a temperature asymmetry, we find that elongated current sheets will again form when the temperature asymmetry is large enough to restore balance in the firehose condition across the layer.
by Peter Katsumi Montag.
Ph. D.
Chen, Xiaoyi. "Novel Conjugated Polymer Prepared by Electrochemical Polymerization as Active Material in Supercapacitor". University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428325817.
Texto completoKothdiwala, Ahmed Farouk. "Simulation and optimisation of asymmetric and symmetric compound parabolic concentrating solar collectors". Thesis, University of Ulster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243738.
Texto completoLightowler, Mark. "Synthesis of novel C₂ symmetric ketene equivalents for asymmetric Diels-Alder reactions". Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334700.
Texto completoIsbiliroglu, Yigit D. "Coupled Soil-Structure Interaction Effects of Symmetric and Asymmetric Buildings In Urban Regions". Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/268.
Texto completoRaya, Lilysuriazna Binti. "A metaheuristic ant colony optimization algorithm for symmetric and asymmetric traveling salesman problems". Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17617.
Texto completoWatts, Nicola Louisa. "Improving the scope and understanding of the Symmetric and Asymmetric Suzuki coupling reaction". Thesis, University of East Anglia, 2012. https://ueaeprints.uea.ac.uk/48116/.
Texto completoHelt, Kimberly M. (Kimberly Mae). "Network Analysis of the Symmetric and Asymmetric Patterns of Conflict in an Organization". Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc501212/.
Texto completoBenson, Richard. "A dosimetric analysis of the varian enhanced dynamic wedge for symmetric and asymmetric configurations". Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19254.
Texto completoL'usage clinique de rayons de photon de méga-tension formés dans le traitement de cancer est devenu un composant essentiel de traitement contemporain avec une confiance jamais-qui augmente sur les projets qui incluent l'ordinateur moulage contrôlé, temporel et spatial de l'ouverture de rayon. Une telle technique dynamique implique l'usage du Enhanced Dynamic Wedge (EDW), qui module la dose de rayonnement à travers un axe d'un champ rectangulaire via le mouvement d'une mâchoire de collimator sous le contrôle informatique. La majorité d'applications cliniques de cette technique emploie un champ qui est ou symétrique et centré sur l'axe central du rayon ou implique un le champ moitié-bloqué s'étendant de l'axe central hors quelque distance. Cependant il y a beaucoup de situations dans lesquelles un d'-axe (asymétrique) le champ serait optimal (par ex pour les extrémités ou les projets avec les volumes de cible de planification de multiple sont irradié d'un angle de portique seul) si c'est nécessaire de comprendre l'effet de déménagement du centre du champ en forme d'EDW de l'axe. Dans cette étude nous avons examiné la variance entre le traitement planifiant le système et la dose prédite selon le modèle clinique actuel. Une procédure a été conçue pour rectifier ces variances et amène les prédictions dans l'accord avec l'un l'autre (et avec les mesures dans le fantôme). fr
Zhang, Rui y 張瑞. "Asymmetric organic oxidation by chiral ruthenium complexes containing D2 and D4 symmetric porphyrinato ligands". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B42576246.
Texto completoAtmander, Elias. "FEDERAL FUNDS RATE ON BITCOIN VOLATILITY : Using the symmetric GARCH and asymmetric EGARCH models". Thesis, Umeå universitet, Nationalekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184979.
Texto completoZhang, Rui. "Asymmetric organic oxidation by chiral ruthenium complexes containing D2 and D4 symmetric porphyrinato ligands". Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/hkuto/record/B42576246.
Texto completoIslam, Naveed. "Cryptography based Visual Data Protection". Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20178/document.
Texto completoDue to the advancements in the information and communication technologies, the transmission of multimedia data over secure or insecure communication channels has increased exponentially. The security of data in applications like safe storage, authentications, copyright protection,remote military image communication or confidential video-conferencing require new strategies for secure transmission. Two techniques are commonly used for the secure transmission of visual data, i.e. cryptography and steganography. Cryptography achieves security by using secret keysto make the data illegible while steganography aims to hide the data in some innocent carrier signal. For shared trust and distributed environment, secret sharing schemes provide sufficient security in various communication applications. The principal objective of this thesis is to achieveprotection of visual data especially images through modern cryptographic techniques. In this context, the focus of the work in perspective, is twofolded. The first part of our work focuses on the security of image data in shared environment while the second part focuses on the integrity ofimage data in the encrypted domain during transmission.We proposed a new sharing scheme for images which exploits the additive and multiplicative homomorphic properties of two well known public key cryptosystems, namely, the RSA and the Paillier. In traditional secret sharing schemes, the dealer partitions the secret into shares and distributethe shares to each of the player. Thus, none of the involved players participate in the creation of the shared secret and there is always a possibilitythat the dealer can cheat some player. On the contrary, the proposed approach employs the secret sharing scheme in a way that limits the influence of the dealer over the protocol by allowing each player to participate. The second part of our thesis emphasizes on the integrity of visual data during transmission. Data integrity means that the data have its complete structure during any operation like storage, transfer or retrieval. A single bit change in encrypted data can have catastrophic impact over the decrypted data. We address the problem of error correction in images encrypted using symmetric key cryptosystem of the Advanced Encryption Standard (AES) algorithm. Three methods are proposed to exploit the local statistics of the visual data and the encryption algorithm to successfully correct the errors
Latulipe, Celine. "A Symmetric Interaction Model for Bimanual Input". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2915.
Texto completoPrevious work in two-handed or bimanual interaction techniques has often followed the asymmetric interaction guidelines set out by Yves Guiard's Kinematic Chain Model. In asymmetric interaction, the hands are assigned different tasks, based on hand dominance. I show that there is an interesting class of desktop user interface tasks which can be classified as symmetric. A symmetric task is one in which the two hands contribute equally to the completion of a unified task. I show that dual-mouse symmetric interaction techniques outperform traditional single-mouse techniques as well as dual-mouse asymmetric techniques for these symmetric tasks. I also show that users prefer the symmetric interaction techniques for these naturally symmetric tasks.
Hartl, Johannes [Verfasser] y Lutz [Akademischer Betreuer] Arnold. "Corporate underinvestment in the presence of symmetric and asymmetric information / Johannes Hartl. Betreuer: Lutz Arnold". Regensburg : Universitätsbibliothek Regensburg, 2012. http://d-nb.info/1026165539/34.
Texto completoHawkins, Joel Michael. "Three new C̲₂ symmetric chiral auxiliaries for metal mediated asymmetric reactions : studies in asymmetric carbon-hydrogen, carbon-nitrogen, and carbon-oxygen bond formation". Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/15198.
Texto completoMICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE
Bibliography: leaves 110-116.
by Joel Michael Hawkins.
Ph.D.
Lake, Fredrik. "C2- and C3-symmetric ligands via ring-opening of aziridines". Doctoral thesis, KTH, Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3424.
Texto completoThis thesis deals with the design and synthesis of chiralenantiopure nitrogencontaining ligands and the use of theseligands in asymmetric catalysis. A modular synthetic approachto enantiopure nitrogen-containing ligands was developed. Thesynthetic method is based on the ring-opening of activatedchiral aziridines by nitrogen nucleophiles. The aziridines areconveniently prepared from amino alcohols. The structure oftheaziridine and of the nucleophile can be extensively varied andlibraries of ligands are easily prepared. The use of primaryamines affords C2-symmetric bis(sulfonamides), whereas the use ofammonia affords C3-symmetric tris(sulfonamides) that can beelaborated into the corresponding tetra-amines.
The C2- and C3-symmetric ligands were used in the asymmetrictitaniummediated addition of diethylzinc to benzaldehyderesulting in modest enantioselection, 76% ee. A thoroughinvestigation of the reaction conditions revealed that theamount of Ti(OiPr)4has a decisive effect on the reaction rate and thestereochemical outcome of the reaction. The reaction timedecreased from about 90 hours to 15 minutes and theenantioselectivity changed from 26% of the (R)- enantiomer to72% of the (S)-enantiomer when the Ti(OiPr)4:benzaldehyde ratio was increased from 0.125:1 to1.48:1. Moreover, the titanium-mediated addition of diethylzincto benzaldehyde was studied in the presence of chiraladditives. The bis(sulfonamides) were also used in thecyclopropanation of cinnamyl alcohol. However, only lowenantioselection was observed, 27% ee.
The C3-symmetric tetra-amines were reacted to formazaphosphatranes. These weak acids were only partiallydeprotonated by the strong base KOtBu to form the correspondingproazaphosphatranes. The unexpectedly strong basicity of theproazaphosphatranes was believed to be due to steric effects assuggested by DFT calculations. The tetra-amines and thesulfonamides were used for the preparation of metal complexesof Lewis acidic metals such as titanium(IV) andzirconium(IV).
Keywords:asymmetric catalysis, aziridine, benzaldehyde,diethylzinc, enantioselective, ligand, proazaphosphatrane,ring-opening, sulfonamide, symmetry, titanium, zirconium
Böhnisch, Torben. "C2-Symmetric Pyrazole-Bridged Ligands and Their Application in Asymmetric Transition-Metal Catalysis". Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://hdl.handle.net/11858/00-1735-0000-0028-876A-6.
Texto completoRigotti, Thomas. "Synthesis and metal complexes of C2 symmetric ligands obtained from (R)-(+)-Betti and dialdehydes for asymmetric induction reactions". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9335/.
Texto completoHassan, Syed. "Exchange rate volatility, UK imports and the recent financial crisis : evidence from symmetric ARDL and asymmetric ARDL methods". Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/373083/.
Texto completoWang, Zhao. "Synthesis of Polyhedral Oligomeric Silsesquioxane(POSS)-Based Shape Amphiphiles with Two Polymeric Tails of Symmetric or Asymmetric Compositions". University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366825911.
Texto completoFalch, Wenche. "Står til tjeneste : Emosjonelt arbeid i tjenestemøtet". Doctoral thesis, Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-6225.
Texto completoOtomaru, Yusuke. "Preparation of new C2-symmetric chiral diene ligands and their use for rhodium-catalyzed asymmetric addition of organoboron reagents". 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144596.
Texto completoKameda, Minoru. "Molecular design of N-spiro C2-symmetric chiral phase-transfer catalysts for practical asymmetric synthesis of α-amino acids". 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147838.
Texto completoTsai, Mei-Hsuan. "Boron containing molecular imprinted polymer (MIP) templates from symmetric and asymmetric diboration of olefins and other boron containing functional polymers". Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608235.
Texto completoGilbert, Edouard. "Optimisation de supercondensateurs à électrolyte organique". Thesis, Orléans, 2010. http://www.theses.fr/2010ORLE2043.
Texto completoSupercapacitors based on activated carbons are characterized by higher power and cycle life than batteries. Due to their low energy density, they are mainly used as secondary storage device. The objectives of this thesis were to improve the energy density of supercapacitors operating in organic electrolyte (TEABF4/AN) and to elucidate the distribution of ions in the pores of activated carbons, before and after the charge of supercapacitors. Two approaches were followed to reach the first objective. First, it has been attempted to increase the volumetric capacitance up to 90 F/cm3. One carbon giving a high electrode density and capacitance, but having a high amount of oxygenated functionalities, has been identified. It was thermally treated under reducing atmosphere to depress the functionalities which negatively impact the ageing of supercapacitors. The post-treated carbon displayed a volumetric capacitance of 88 F/cm3. Asymmetric carbon/carbon supercapacitors, with different mass or/and different carbons for the electrodes, were constructed for shifting the stability window towards lower potential values. Laboratory cells built in these conditions exhibited promising performance during cycling, which encouraged us to confirm the results at industrial scale. In particular, the asymmetric configuration using electrodes of different mass showed better ageing behavior at 2.7 V that the symmetric system. RMN analysis of the powder from electrodes soaked with the organic electrolyte showed that the solvent and ionic species are already confined into the micropores without applying any polarisation. During charging, the solvent molecules are expelled from the porosity of the negative electrode while TEA+ ions penetrate into the pores without their solvation shell. On the contrary, the presence of some solvent together with BF4 - in the positive electrode indicates that the BF4 - ions are partially solvated. Upon increasing the voltage, the amount of TEA+ and BF4 - increases in the negative and positive electrode, respectively; however, counter ions are still present even at high voltage
Liu, Chang. "The design, synthesis of potential sialidase inhibitors as anti-influenza drugs and synthesis of C-2 symmetric ligands for transition metal catalyzed asymmetric reduction reactions". Diss., Connect to online resource - MSU authorized users, 2006.
Buscar texto completoWen, Miao. "Chemical analysis and biosynthesis of secondary alcohols in plant cuticular waxes". Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/4304.
Texto completoGunell, Joachim y Jonas Kolijn. "Varför underprissätts nyintroduktioner? : En empirisk utredning av teoretisk diskrepans - bevis från Sverige". Thesis, Linköpings universitet, Företagsekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129944.
Texto completoBackground and problem: Underpricing has been subject to studies for many years, and the phenomena have been observed on a vast majority of studied countries. Despite the fact that studies have been conducted, there is no consensus as to which theories might best explain underpricing. Theories explaining underpricing are mainly divided into either symmetric or asymmetric information, and the empirical results presented testifies to the theoretical discrepancy, with support for and against several theories. The theoretical discrepancy is the main reason as to why we choose to closer examine the phenomena. Purpose: The purpose of this study is, based upon contradictory empirical results, to investigate as to which different theoretical incentives can explain IPO underpricing in order to create a better understanding of the complexity regarding theory for IPO underpricing. Methodology: In the study we apply a quantitative research method in which we, similar to international reference studies, use a multiple regression analysis with an ordinary least squares approach in order to test which theories are applicable in order to explain underpricing. We approximate the theories using variables with belonging hypotheses to quantify the variables individual and accumulated effect on underpricing. Using hypothesis testing we enable a connection between the statistical results and theories explaining underpricing. Conclusions: The study’s result support both theories based upon symmetric and asymmetric information which illustrates the complexity of the phenomenon of underpricing. Based on the statistical results the authors conduct an analysis in which theories are discarded from the context of symmetric and asymmetric information and are instead analyzed simultaneously. This analysis presents an alternative view of underpricing theories, in which theories belonging to symmetric as well as asymmetric information no longer are mutually excluding, which introduces a new approach to theoretical explanations for IPO underpricing.
Zhu, Beibei. "Three Essays on Employer Learning and Statistical Discrimination". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23168.
Texto completoChapter two develops a framework that nests both symmetric and asymmetric employer learning, and derives testable hypotheses on racial statistical discrimination under different processes of employer learning. Testing the model with data from the NLSY79, we find that employers statistically discriminate against black workers on the basis of both education and race in the high school market where learning appears to be mostly asymmetric. In the college market, employers directly observe most parts of the productivity of potential employees and learn very little over time.
In chapter three, we investigate how the process of employer learning and statistical discrimination varies over time and across employers. The comparison between the NLSY79 and the NLSY97 cohorts reveals that employer learning and statistical discrimination has became stronger over the past decades. Using the NLSY97 data, we identify three employer- specific characteristics that influencing employer learning and statistical discrimination, the supervisor-worker race match, supervisor\'s age, and firm size. Black high school graduates face weaker employer learning and statistical discrimination if they choose to work for a black supervisor, work for an old supervisor, or work in a firm of small size.
In the last chapter, we are interested in the associations between verbal and quantitative skills and individual earnings as well as the employer learning process of these two specific types of skills. There exist significant differences in both the labor market rewards and employer learning process of verbal and quantitative skills between high school and college graduates. Verbal skills are more important than quantitative skills for high school graduates, whereas college-educated workers benefit greatly from having high quantitative skills but little from having high verbal skills. In addition, employers directly learn verbal skills and continuously learn quantitative skills in the high school market, but almost perfectly observe quantitative skills in the college market.
Ph. D.
Yates, James William. "Mixing Staged Data Flow and Stream Computing Techniques in Modern Telemetry Data Acquisition/Processing Architectures". International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608707.
Texto completoToday’s flight test processing systems must handle many more complex data formats than just the PCM and analog FM data streams of yesterday. Many flight test programs, and their respective test facilities, are looking to leverage their computing assets across multiple customers and programs. Typically, these complex programs require the ability to handle video, packet, and avionics bus data in real time, in addition to handling the more traditional PCM format. Current and future telemetry processing systems must have an architecture that will support the acquisition and processing of these varied data streams. This paper describes various architectural designs of both staged data flow and stream computing architectures, including current and future implementations. Processor types, bus design, and the effects of varying data types, including PCM, video, and packet telemetry, will be discussed.
Böhnisch, Torben [Verfasser], Franc [Akademischer Betreuer] [Gutachter] Meyer, Guido [Gutachter] Clever, Thomas [Gutachter] Waitz, Ulf [Gutachter] Diederichsen, Dietmar [Gutachter] Stalke y Konrad [Gutachter] Koszinowski. "C2-Symmetric Pyrazole-Bridged Ligands and Their Application in Asymmetric Transition-Metal Catalysis / Torben Böhnisch. Betreuer: Franc Meyer. Gutachter: Franc Meyer ; Guido Clever ; Thomas Waitz ; Ulf Diederichsen ; Dietmar Stalke ; Konrad Koszinowski". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1103233963/34.
Texto completoSantilli, Vincent. "THE EFFECTS OF POWER DISTANCE, AND GENDER ON THE USE OF NONVERBAL IMMEDIACY BEHAVIORS IN SYMMETRICAL AND ASYMMETRICAL POWER COND". Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3715.
Texto completoM.A.
Nicholson School of Communication
Sciences
Communication MA