Dissertations / Theses: 'Squarate'

1

Soules, Régis. "Propriétés coopératives de complexes polymétalliques des ligands squarate et thiosquarate." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37610006n.

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2

Soules, Régis. "Proprietes cooperatives de complexes polymetalliques des ligands squarate et thiosquarate." Toulouse 3, 1987. http://www.theses.fr/1987TOU30178.

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Etude de l'emploi d'un coordinat assembleur qui puisse par coordination avec le centre metallique utilise (metaux de transition du groupe viii) aboutir a un agencement a une dimension des motifs moleculaires par empilement d'entites monomeres ou par formation de chaines. Par utilisation du coordinat squarate sous ses formes oxygenees et soufrees, obtention d'un certain nombre de complexes de pt, pd, ni et cu repondant aux criteres fixes. Etude des structures de ces composes, de leurs proprietes physiques et de la relation structure-propriete. La nature du coordinat comme le caractere specifique de l'arrangement structural ont ete discutes pour une approche de la comprehension de la nature de ces proprietes physiques

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3

Deguenon, Diane. "Etude des anions squarate et croconate : complexes métalliques de ces ligands." Toulouse 3, 1990. http://www.theses.fr/1990TOU30074.

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Les anions squarate et croconate, membres de la famille des oxocarbones, sont caracterises par un cycle aromatique. Ils pourraient donc constituer, comme l'ion oxalate, des ligands interessants pour les metaux de transition et permettre des echanges magnetiques entre les metaux qu'ils pontent. La premiere partie de ce travail est relative a l'etude des ligands et de certains derives soufres. Par voie electrochimique, des anions radicaux sont generes. La formation de radicaux par irradiation de monocristaux de csnac#5o#5 a permis de pieger a 77 k, une paire radicalaire dont l'etude par rpe sur monocristal est reportee. Par ailleurs, l'irradiation de complexes de platine(ii) en presence d'ions hydrogenosquarate (monocristal) ou hydrogenocroconate (poudre) cree un centre paramagnetique platine(iii) dont le comportement a 77 k, etudie par rpe sur monocristal, est egalement presente. L'etude de la decomposition photochimique de l'acide croconique en milieu aqueux montre qu'elle conduit aux acides oxalique et mesoxalique. Un mecanisme faisant intervenir l'oxygene singulet permet d'expliquer les resultats obtenus lors de la synthese des complexes metalliques. Enfin, la synthese et l'etude des proprietes magnetiques de nouveaux complexes polymetalliques des acides oxalique, squarique ou croconique sont reportees. Les premiers dimeres de l'acide squarique et du cuivre(ii) ont ete caracterises grace a leur structure moleculaire cristalline aux rayons x. De plus, une chaine alternee d'heisenberg a ete obtenue. Les structures cristallines aux rayons x des premiers complexes a ligands mixtes du cuivre(ii) ou du manganese(ii) avec l'acide croconique sont presentees. En outre les proprietes magnetiques de tous les complexes polymetalliques synthetises sont presentees et discutees dans ce memoire

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4

Mohamed, Nuralli. "Electrochemical studies of monosubstituted squarate ligands and its transition metal and lanthanide complexes." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9818_1263431045.

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The study introduces and puts forward Sector Policing as a model to expand community Policing and to broaden the scope of crime prevention. It also demonstrates how Sector Policing can be utilised to decentralise policing and deepen community participation.

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5

Cortadellas, Olivier. "Complexes métalliques à ligands pseudo-oxocarbone cyanamido-squarate : vers des propriétés électrochromiques et photovoltai͏̈ques." Toulouse 3, 2004. http://www.theses.fr/2004TOU30035.

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Les dianions n-NCNsq2- (n = 4 ; 3,4 ; 2,4) sont des dérivés du dianion squarate pour lesquels des fonctions carbonyle sont substituées par une ou deux fonctions cyanamido NCN. L'étude électrochimique de ces composés a montré une oxydation en deux étapes monoélectroniques successives permettant l'obtention de radicaux-anions n-NCNsq-· stables à basse température dans l'acétonitrile et d'espèces neutres n-NCNsq instables. Ce comportement électrochimique associé à des colorations différentes en fonction du degré d'oxydation confère à ces composés des propriétés électrochromiques. Les études structurales réalisées sur ces dianions ont également permis de mettre en évidence la planéité et l'aromaticité de ces molécules. Une fois la caractérisation des dianions cyanamido squarate terminée, nous nous sommes intéressés aux propriétés complexantes de ces molécules vis-à-vis du nickel(II), du palladium(II) et du cuivre(I) et (II). La détermination structurale de dix complexes a montré l'existence de plusieurs modes de coordination par les atomes d'azote : nitrile, amido ou encore nitrile-amido. Les études électrochimiques réalisées sur les complexes synthétisés ont permis de mettre en évidence des processus d'oxydation qui diffèrent selon le métal. Si les complexes du Ni(II) se dissocient au cours de nos études, les complexes du Pd(II), du Cu(I) et du Cu(II) présentent une certaine stabilité et un comportement électrochimique semblable à celui observé pour les dianions n-NCNsq2-. .
The n-NCNsq2- dianions derive from squarate dianions, which carbonyl functions have been substituted by one or two cyanamido NCN functions. The electrochemical study of these compounds has shown an oxydation process following two successive mono-electronic steps giving stable radical-anions n-NCNsq-· at low temperature in acetonitrile and then unstable neutral species. These electrochemical behavior associated with a color change depending on the oxidation state give to these compounds electrochromic properties. The structural studies of these dianions have evidenced the planarity and aromaticity of these molecules. After the caracterization of the cyanamido squarate dianions, we have been interested in the dianions complexing properties with nickel(II), palladium(II) and copper(I) and (II). .

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Morwick, Tina M. "Tandem reactions of functionalized squarate esters and other cyclobutenediones, methodology and applications to the synthesis of polyquinane natural products /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487936356161331.

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7

Hamme, Ashton Thodore. "Mechanistic probing of helical equilibration and self-immolation of chirality in squarate ester cascades : synthetic efforts toward linear triquinane natural products /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949150070523.

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8

Liu, Jian. "Application of squarate ester cascade reactions to the synthesis of (+/- ) hypnophilin. New photorearrangements of 2-Cyclopentenones. Studies towards the total synthesis of pectenotoxin II." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1037679001.

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Thesis (Ph. D.)--Ohio State University, 2002.
Title from first page of PDF file. Document formatted into pages; contains xiv, 242 p.). Includes abstract and vita. Advisor: Leo A. Paquette, Dept. of Chemistry. Includes bibliographical references (p. 233-242).

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9

Mohanu, Antoneta. "Nouveaux squarates de vanadium (+III et +IV) : structures ouvertes d'oxalates de lanthanide (+III) et d'amines protonées." Toulouse 3, 2005. http://www.theses.fr/2005TOU30101.

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Ce travail a consisté à synthétiser, par voie hydrothermale, des squarates de vanadium et des oxalates de lanthanide et d'amines protonées. Les composés ont été caractérisés par diffraction des rayons X sur mono-cristaux, par spectroscopie infrarouge et analyse thermique. Trois nouveaux squarates de vanadium ont été obtenus, deux dimères et un feuillet. Ce dernier présente des chaînes infinies. . . V-F. . . Reliées par des ligands squarate. Le premier composé développe des interactions ferromagnétiques et le dernier des interactions antiferromagnétiques. Dix structures originales, très ouvertes, à base d'oxalates de lanthanide en présence d'agents structurants de type amine ont été obtenues. Le réseau hôte forme des tunnels s'interpénétrant à section carrée, pentagonale et hexagonale. A l'intérieur de ces tunnels se logent les cations aminés et les molécules d'eau libres. Le processus de déshydratation de la famille (CN3H6)2[Ln2(H2O)2(C2O4)4],3H2O est partiellement réversible
In this work, are grown by hydrothermal synthesis some single crystals of three new vanadium squarates and ten new open-framework lanthanide oxalates containing as a template the protonated amine. All the compounds were characterized by X-ray diffraction, infrared spectroscopy and thermal analysis. The first two structures of vanadium squarates consist of dimeric species. Concerning the third one, it is a layer where the vanadium atom is bound to two fluorides leading to infinite chains, connected by squarate ligands. Ferromagnetic interactions are present for the first dimeric species and antiferromagnetic interactions for the layer. Concerning the lanthanide oxalates, the host frame leads to a very open-architecture with partially intersecting channels of cross-section either square or pentagonal or hexagonal. The amine-cations and the free water molecules are localized within these channels. The dehydration process of the family (CN3H6)2[Ln2(H2O)2(C2O4)4]. 3H2O is partially reversible

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10

Sejwal, Preeti. "I. Water-driven chemoselective reactions of squarate derivatives with amino acids and peptides Mechanism and applications. II. Biocompatible hydrogels: Transferring bioinert chemistry from surfaces to 3-dimensional materials /." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.

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11

Bouayad, Abdelouahed. "Complexes hétérobimétalliques à ligand assembleur oxo ou thiooxo d'éléments s, d et f : influence des ligands oxalate et squarate sur la structure ; étude de tels complexes comme précurseurs de céramiques." Toulouse 3, 1990. http://www.theses.fr/1990TOU30061.

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Les composes heterobimetalliques suivants ont ete prepares et structuralement caracterises par diffraction x sur monocristal: ba(h#2o)#5cu(c#2o#4)#2(h#2o) 1, ba(h#2o)#2#2cu(h#2o)#2(c#4o#4)#3 2, gd(h#2o)#4#2cu(h#2o)#4(c#4o#4)#4, 2h#2o 3 et cu#0#. #9mn#0#. #1(h#2o)#4(c#4o#4) 4. 1 contient des colonnes d'anions cu(h#2o)(c#2o#4)#2#2#. 2 est fait de couches cationiques ba(h#2o)#2(c#4o#4)#2#+#2# dans lequelles le ligand squarate est a la fois bischelatant et tetramonodentate; ces couches sont liees par des anions cu(h#2o)#2(c#4o#4)#2#. 3 est constitue de feuillets neutres heterobimetalliques (mu#3c#4o#4)gd(h#2o)#4#2(mu#2c#4o#4)#2 cu(h#2o)#4#2. 4 est fait de chaines neutres illimitees. . . -m(h#2o)#4-(c#4o#4)-m(h#2o)#4-(c#4o#4)-. . . Dans lesquelles les cations sont distribues statistiquement. Un cinquieme compose, homometallique, forme de chaines, cu(h#2o)#4(nc#5h#5)#2(c#4o#4) 5, a ete obtenu incidemment et etudie. Les mesures de la susceptibilite magnetique en fonction de la temperature entre 4 k et 300 k font apparaitre un tres faible couplage antiferromagnetique dans 1, 2 et 5 et aucune interaction significative dans 3. Le comportement magnetique de 4 suggere la presence d'une interaction ferrimagnetique 1-d. Les comportements thermiques ont ete etudies par atg et atd sous courant he:o#2 jusque vers 900#oc. Les produits finaux de la decomposition sont: un melange de baco#3, bacuo#2 et cuo pour 1, de baco#3 et bacuo#2 pour 2, de cuo et mno pour 4, et l'oxyde bimetallique gd#2cuo#4 pour 3. La seconde partie est une etude de la decomposition thermique du dithiooxalate mixte de la et ni, en presence d'oxygene et sous vide. En presence d'oxygene, on obtient un melange de nio et de la#2o#2(so#4) a partir de 880#oc. Sous vide, l'oxysulfure la#2o#2s cristallise se forme des 700#oc

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Georgopoulos, Stéfanos Leite. "Identificação e determinação de espécies derivadas do ácido esquárico em dimetilsulfóxido e em sais de tetraalquilamônio." Universidade Federal de Juiz de Fora (UFJF), 2014. https://repositorio.ufjf.br/jspui/handle/ufjf/4300.

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CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
A investigação das soluções de ácido esquárico (H2SQ), diprótico, em dimetilsulfóxido, utilizando a espectroscopia Raman, com o auxílio do cálculo dos métodos numéricos, possibilitou identificar e determinar quantitativamente diversas espécies formadas em solução, distinguindo também as possíveis interações entre o solvente e o soluto e, ainda, a interação entre os solutos vizinhos. A identificação destas interações permitiu tanto a descoberta de espécies químicas na solução, como o H2SQ não-dissociado, formando complexo e não formando complexo, como a fração de H2SQ que se dissociou, formando o ânion monovalente hidrogeno-esquarato (HSQ-) e o ânion divalente esquarato (SQ2-). Também se fez a determinação do tipo de interação predominante que ocorre entre os H2SQ, explicando-se a razão de surgir a cor rosa nas soluções que contêm o H2SQ como soluto, através da interação π-π entre os anéis vizinhos. A formação de sistemas cristalinos através dos sais contendo os cátions tetraalquilamônio e os ânions originados dos oxocarbonos, tais como o íon SQ2-, o ânion divalente croconato e o íon HSQ-, fornece condições de investigar como a variação do volume do cátion influencia na forma da dissociação iônica sofrida pelo H2SQ. Ao compararmos os diferentes sais de tetraalquilamônio, podemos perceber a avidez do ânion divalente croconato, por moléculas de água, e a preferência dos ânions derivados do H2SQ e do próprio H2SQ por realizar ligações de hidrogênio entre si, em solução aquosa. Estes sistemas cristalinos mostram claramente a maior “maciez” da nuvem eletrônica dos íons originados a partir da dissociação iônica do H2SQ do que a daqueles originados no íon croconato. A formação exclusiva do íon SQ2-, ligado, por ponte de hidrogênio, a outros dois H2SQ, no esquarato de tetrabutilamônio, enquanto no sal de tetrapropilamônio há apenas dois íons HSQ-, ligados por pontes de hidrogênio entre si, mostram o quanto o volume do cátion influencia na quantidade de dissociação iônica sofrida pelo H2SQ.
Investigations of the diprotic squaric acid (H2SQ) solutions in dimethylsulfoxide using Raman spectroscopy supported by numerical method calculation, were able to identifying and measure the amounts of the several species present in solutions, taking into account the interactions between solvent and solute, as well as the neighbouring solutes. The identification of such interactions allowed the discover of the chemical species present in the solution, as for instance the complex and non-complex H2SQ associated species, and the dissociated H2SQ, as a fraction of the hydrogen squarate anion (HSQ-) and divalent anion squarate (SQ2-). In addition, the type of interaction between neighbors H2SQ has also been determined, justifying the reason of an emerging pink color for the H2SQ solutions, probably generated by π-π interaction between neighbor rings of H2SQ species. The synthesis of a crystaline system originated by tetraalkylammonium cations and oxocarbon anions, as a SQ2- ion, croconate divalent anion and HSQ- ion was able to investigate how the variation of the cationic volume can influence the type of ionic dissociation presented by the different H2SQ species. When comparing different tetraalkylammonium salts, it can be noticed a great affinity by water molecules from croconate divalent anion, and the preference of the anions derived from H2SQ to perform hydrogen bonds between them, in aqueous solution. This crystalline system shows more “softly” electronic clouds of the ions originated from ionic dissociation of the H2SQ than croconate ion. Exclusive formation of the SQ2- ion, bonded by htdrogen bonds, for two H2SQ species, in the tetrabutylammonium squarate salts, while in the tetrapropylammonium salts have only two HSQ- ions, bonded by hydrogen bonds between them, has also showed how the cation volume can be an important influence for the ionic dissociation quantities suffered by H2SQ.

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13

Williamson, Patricia Catherine. "Squaraine dyes." Thesis, Cranfield University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323902.

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14

Petermann, Ralf. "Squaraine mit verlängerter Konjugation." [S.l. : s.n.], 2001. http://ArchiMeD.uni-mainz.de/pub/2001/0073/diss.pdf.

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15

Gerold, Jürgen. "Squaraine mit ausgedehnter Konjugation." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963615726.

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16

Deratany, Jay Paul. "Justice Square." Thesis, University of California, Riverside, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1543191.

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A young American woman who lost her mother in 9/11 needs a heart transplant and discovers that her only hope is to pay a small fortune for her Muslim doctor to escort her to Iran for the operation. Reluctantly putting her mistrust aside, she agrees to the bargain but once in Iran her doctor's mysterious behavior and the terrible social injustice she finds propel her to become enmeshed in the tragic case of two young boys framed and threatened with execution for homosexuality. Her doctor finally reveals what her behavior is endangering, a secret clinic he runs to aid those abused by the system. He wants her to ignore the plight of the boys but she refuses. Her discovery of the heart that had been buried under the scar tissue of 9/11 nearly destroys them both, but in the end their passion for justice saves them and brings two opposing cultures a bit closer.

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17

Mazzon, Andrea. "Processo Square Root." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3834/.

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Poirier, Schmitz Alfredo. "Approximating square roots." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/96654.

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19

Langenau, Holger. "Squaring the square." Universitätsbibliothek Chemnitz, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-233031.

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Given a square with integer side length n, we ask for the number of different ways to divide it into sub-squares, considering only the list of parts. We enumerate all possible lists and check whether a placement with those squares is possible. In order to do this, we propose a new algorithm for creating perfect square packings.

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Mole, Richard Adam. "Investigation into the magnetic properties of transition metal hydroxy squarates." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614078.

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Mayer, Sebastian. "Hilbert modular forms for the fields Q([square root]5), Q([square root]13) and Q([square root]17)." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985767022.

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Moreshead, William. "Enhanced Two-Photon Absorption in a Squaraine-Fluorene-Squaraine Dye: Design, Synthesis, Photophysical Properties, and Solvatochromic Behavior." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6325.

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The discovery of any new technology is usually accompanied by a need for new or improved materials which make that technology useful in practical applications. In the case of two-photon absorption (2PA) this has truly been the case. Since its first demonstration in 1961, there has been an ever increasing quest to understand the relationships between two-photon absorption and the structure of two-photon absorbing materials. This quest has been motivated by the many applications for 2PA which have been reported, including fluorescence bioimaging, 3D microfabrication, 3D optical data storage, upconverted lasing, and photodynamic therapy. The work presented in this dissertation represents another step in the effort to better understand the structure/property relationships of 2PA. In this work a new, squaraine-fluorene-squaraine molecule, proposed through a joint effort of quantum and synthetic chemists, was synthesized and its photophysical properties were measured. The measurements included linear and two-photon photophysical properties, as well as solvatochromic behavior. Quantum calculations were done to aid in understanding those photophysical and solvatochromic properties. A single squaraine dye was also synthesized and used as a model compound to assist in understanding this new structure. In Chapter 1 an introduction to 2PA and several of its applications is given. Chapter 2 gives a background of 2PA structure/property relationships that have been reported to date, based on work done with polymethine dyes. Chapter 3 gives a full account of the synthesis, characterization, and detailed quantum chemical analyses of this new squaraine-fluorene-squaraine molecule and the corresponding model compound squaraine dye. Chapter 4 gives some additional work and suggested future directions.
Ph.D.
Doctorate
Chemistry
Sciences
Chemistry

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Helfrick, John C. "Cyclic square wave voltammetry." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/30681.

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Li, Luming. "Grand Theater Square - Shanghai." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2611.

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Thesis (M.Arch.) -- University of Maryland, College Park, 2005.
Thesis research directed by: Architecture. 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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Eskiyerli, Mirat Hayri. "Square root domain filters." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299973.

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吳智豪 and Chi-ho Ng. "Metamorphosis of Statue Square." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31982116.

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Ng, Chi-ho. "Metamorphosis of Statue Square." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25944903.

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Van, Pelt Tom Gregory. "University Square Development Proposal." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1275.

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The University Square Development Proposal (USDP) explores the redevelopment of the underutilized University Square site (the Site) in the City of San Luis Obispo (the City.) The Sites proximity to California Polytechnic State University, San Luis Obispo (Cal Poly), a university with significant student housing needs, makes it an ideal location for student housing. The City has also expressed interest in the Site, having identified it in the General Plan Land Use and Circulation Element (LUCE) update as a “Special Planning Area”. The LUCE proposes a new mixed-use typology on the Site that may include a mixture of multi-family housing, retail services, entertainment, and recreation. The USDP is an early take on redevelopment of the Site, and provides a development option that accommodates both the objectives of Cal Poly, by providing student housing, and the City, by proposing a mixed-use development typology. To this end, the USDP includes a site assessment, project program, design vision, and financial analysis. The USDP concludes with project evaluations and lessons learned.

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Fryklind, Emelie. "Don´t be square." Thesis, Konstfack, Textil, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-5183.

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GOUVEA, LAURA VIEIRA DE. "CONTEMPORARY CARIOCA SQUARE: NA ERGONOMIC ANALYSIS OF THE BUILT ENVIRONMENT AT EDMUNDO BITTENCOURT SQUARE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=23924@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
Esta pesquisa apresenta uma avaliação ergonômica dos aspectos físicos de praças urbanas, desenvolvida com base na opinião da população. Buscou compreender a relação entre o mobiliário urbano e seus usuários, e ainda, a importância desta troca na vivência do espaço denominado Praça - espaços livres públicos, de lazer, de estar, de contestar, de viver. O cenário desta análise foi a cidade do Rio de Janeiro, facilitando assim a pesquisa de campo. A partir de uma seleção prévia, algumas praças cariocas foram avaliadas através da utilização de técnicas, com o objetivo de entender o seu sistema e sua funcionalidade. Por fim, uma única praça foi selecionada como objeto de estudo: a Praça Edmundo Bittencourt. A partir dos resultados obtidos através dos métodos aplicados durante a pesquisa foi possível avaliar a real importância e influência do mobiliário urbano no ambiente construído observado. Foi identificada uma dificuldade da parte dos usuários em compreender o espaço público como um conjunto de objetos. O design, o conforto e a qualidade dos mobiliários ficaram em segundo plano, diante da acessibilidade, da limpeza e do conforto ambiental.
This research presents an ergonomic evaluation the physical aspects of urban squares, developed based on the opinion of the population. Furthermore try to comprehend the relation between the urban furniture and the square visitors, and its importance in the existence of the space called Square - public open spaces, leisure, living, to challenge, to live. This analysis took place in Rio de Janeiro, turning easier the process of field research. From an initial selection, some carioca squares where evaluated through the application of techniques, with the objective of understanding its system and functionality. Eventually only one square was chosen as the object of study: the Edmundo Bittencourt Square. From the results obtained through the methods applied during this research, it was possible to evaluate the real importance and influence of the urban furniture in the considered environment in which it was built. It was identified a difficulty among part of users to understand the public space as a set of objects. The design, comfort and quality of the urban furniture remained in the background, in front of accessibility, cleanliness and the environments comfort.

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31

Colon, Gomez Maria. "Squaraine dyes for two-photon fluorescence bioimaging applications." Honors in the Major Thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/834.

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32

袁淸文 and Ching-man Yuen. "Redevelopment of Yue Man Square." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B3198373X.

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Yang, Zhicheng. "Dynamic buckling of square tubes." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243260.

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Yuen, Ching-man. "Redevelopment of Yue Man Square." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25955421.

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35

Soloway, Scott M. (Scott Michael). "Wooster Square : revisiting urban renewal." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/77854.

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Lin, Yang. "Encounters with A Baroque Square and Skyscrapers: The urban transformation of Zhongshan Square Dalian China." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321642088.

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37

Büschel, Michael. "Photochemisch, elektrochemisch und konformativ schaltbare Fluoreszenzfarbstoffe Benzodithiophene, Squaraine und Polysulfanylbenzole /." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965095401.

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38

Xu, Hongyi. "Large eddy simulation of turbulent flows in square and annular ducts and confined square coaxial jet." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0006/NQ27860.pdf.

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39

Shi, Yanrong. "Squaraine dyes for non-linear optics and organic electronics." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44720.

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This dissertation describes the investigation of the synthesis and characterization of new squaraine-based photonic and electronic materials. In the first part of this thesis, squaraine dyes with large conjugation systems, including extended squaraines consisting of bis(donor)substituted vinylene-heterocycles and bis(indolinylenemethyl)squaraine-based oligomers linking through different π-bridges were designed, synthesized and characterized to exhibit strong two-photon absorption (2PA) for femotosecond and nanosecond optical-power limiting applications in the near-infrared (NIR). One of the dendronized squaraine forms smooth and high optical quality films with large NIR transparency window. In the second part, a series of squaraine- and phthalocyanine-based metal complexes were studied. Those dyes did not show large triplet quantum yield but significantly improved photovoltaic performance compared to the metal-free compounds. In the last part, an effective approach on optimizing bis(indolinylenemethyl)-based squaraine sensitizers with various surface anchor groups and π-linkers, achieved high power conversion efficiencies (PCEs) of 6.7% in liquid dye-sensitized solar cells (DSSCs) and 2.7% in solid-state DSSCs, which stand out all the previous reported squaraine-based sensitizers.

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40

Ito, Masayuki, 直史高木, Naofumi Takagi, and Shuzo Yajima. "Square rooting by iterative multiply-additions." Elsevier, 1996. http://hdl.handle.net/2237/2752.

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41

Britton, Michael C. "Practical square cross-section helical antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ43337.pdf.

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42

Papachristou, Petros G. "Probabilistic relaxation for square lattice structures." Thesis, University of Surrey, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241395.

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Dost, Ascander H. "Linearization, square pegs, and round holes /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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44

Britton, Michael C. (Michael Charles) Carleton University Dissertation Engineering Electronics. "Practical square cross-section helical antennas." Ottawa, 1999.

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45

Marrs, Jo-Ann. "Organizing a Course from Square One." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etsu-works/7110.

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46

Humphry, Melinda Susan. "Four projects: gate, island, square, airport." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53131.

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"When we go wandering....it is ourselves we desire to have translated into stones and plants, and it is in ourselves that we wish to walk." -Nietzche What happens when a building speaks to you? The structure makes a simple statement. That statement is reinforced by the light, the space, and the primary materials and how they are connected to the secondary materials and the tertiary materials. Attention is given to the scale of a large group of people, as well as to the scale of a man and to the size of his hand. Unlike the familiar image of a machine, architecture retains the complexities of life and is founded on them. It develops in a variety of episodes, situations, and possible conditions. The relative juxtaposition of structured elements (walls, surfaces, structures, windows) conveys a sense of the whole. It is harmonious because it is related to a purpose. It is beautiful because it is a poetic manifestation of life. Thus, a building is a reasoned fragment, the sign of a presence. Its aesthetic is a condition discovered, not a starting point.
Master of Architecture

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47

Panahi, Mina. "LNA considerations for square kilometre array." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/lna-considerations-for-square-kilometre-array(241ee45f-f603-40f1-8602-bae157f1aefa).html.

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This thesis describes the design of low noise amplifier (LNA) for the international Square Kilometre Array (SKA) project. LNAs in radio astronomy receivers play an important role of amplifying very weak signals from the Universe and the significance of the LNAs become more crucial in the SKA which is the largest and most sensitive radio telescope in the World. The aperture array (AA) system proposed for SKA is projected to deploy tens of millions of LNAs in a receiver system to survey large areas of the sky simultaneously over the frequency bands of 70-450MHz and 400-1400MHz. Hence LNA power efficiency has a significant implication in the SKA AA system due to the large number of the LNAs required. This thesis describes the design of 9 LNAs for the SKA. Seven LNAs with very low power consumption were designed, fabricated and characterised for SKA AA system using MIC technology by employing COTS components. Single ended and differential to single ended configurations were used for the lower frequency band of SKA AA system. Low noise figures (noise temperatures) of 0.6dB (43K) were achieved with high gain of more than 30dB at a power consumptions of less than 25mW for lower frequency band of AA. The LNAs designed to perform at 400-1400MHz have a very low power consumption of 28mW with an average noise figure (noise temperature) of 0.45dB (32K). Two MMIC LNAs based on low noise TQP13N pHEMT process of TriQuint Semiconductors with gate length of 130nm were designed for the low (0.7-1.8GHz) and high (8-10GHz) frequency ends of the SKA. The packaging and housing solutions of the SKA LNAs were implemented. The work described in this thesis shows low noise figures (noise temperatures) with high gains are achieved at a very low power consumption of less than 30mW for the MIC LNAs in the SKA AA system by using commercially available components.

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Jimoh, Moduple O. "Solute mixing due to square manholes." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/77149/.

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Dispersion in sewers affects the concentration of pollutants within urban drainage systems and the quest to understand it has led to extensive studies of the hydraulics within circular manholes. Since there are both circular and square manholes within the urban drainage system, it is important to understand the hydraulics within a square manhole, its similarities and/or differences. This research is aimed at describing the transportation and mixing of soluble pollutants through urban drainage systems and the effects of structures such as manholes. It also seeks to study the relationship between headloss and dispersion coefficient in a full flowing pipe. Laboratory solute transport studies were carried out on a straight pipe with two diameter sizes (35 mm and 25 mm) of orifice plate inserted. Two square manhole sizes (388 mm x 388 mm and 150 mm x 150 mm) with a straight through flow was also studied at surcharge and overflow conditions. A relationship between the total headloss along the length of the pipe and the dispersion coefficient was established. With the introduction of a new parameter, a relationship was also established between the headloss due to the orifice and the dispersion coefficient when an orifice plate is inserted along the line of flow. It was observed for the large manhole size that at low surcharge depths there was more mixing occurring while at high surcharge depths the dye travels in a straight jet with some tracer trapped at the upper manhole volume. There exists a transition zone between the low and high surcharge depths which is not evident in the small size manhole. These observations mirror the phenomena that have already been observed in circular manholes. Manhole overflow studies was indicative of a completely mixed flow for the large manhole whereas for the small manhole it suggests a piston flow (sometimes referred to as plug flow) with some longitudinal dispersion occurring.

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49

Lai, Hoke Sai. "Partially prestressed concrete internal square panel." Thesis, University of Leeds, 1986. http://etheses.whiterose.ac.uk/301/.

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This work is concerned with the general behaviour of an internal panel in a column supported multi-bay floor structure, under the influence of various prestressing tendon arrangements. The prestressing effects are studied with the help of a finite element package (PAFEC), representing the prestressing forces by equivalent vertical loads. From a variety of possible spacing arrangements, the distribution of prestressing moments is shown to be most effective in counteracting the moments due to externally imposed load when the tendons are narrowly banded in the column vicinity. The effects of tendon arrangement on slab behaviour are further investigated by means of an experimental programme comprising three series of ten tests of 1.5m span partially prestressed panel with typical span to depth ratio, levels of loading, levels of prestress and geometry of tendon profiles. The models were fixed along the edges to simulate the continuity of an internal panel in a multi-panel slab system. Post-tensioned tendons were arranged in various patterns, as currently employed in construction practice, to induce either a medium or a low level of prestress in the test panel, conforming to the design recommendations of a number of codes of practice. Test results indicated that the serviceability behaviour of the slabs with a low level of prestress was strongly influenced by the tendon distribution and the amount of non-prestressed reinforcement. Slabs with tendons banded closely in the column area exhibited a higher cracking load and were stiffer after cracking. The flexural strength of the test slabs was found to be greater than that predicted by yield line theory and the increase was attributed to membrane action. The experimental values of tendon stress at ultimate load and of punching shear were compared with those obtained by various design methods.

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50

Marrot, Florent. "Etude des malonates et squarates de lanthanoi͏̈de comme précurseurs des sulfures et oxysulfures correspondants." Toulouse 3, 1994. http://www.theses.fr/1994TOU30207.

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Cette recherche s'inscrit dans le cadre de l'elaboration de materiaux a partir de complexes de coordination, par le biais d'une degradation thermique en atmosphere controlee, a des temperatures aussi basses que possible. L'objectif particulier recherche vise a l'obtention de sulfures de terre-rare a partir des malonates ou squarates de ces elements. Les structures de deux complexes malonate de lanthane penta-hydrate et de deux complexes malonate mixtes de lanthane et de cuivre ont ete determinees. Toutes ces structures presentent des feuillets denses charges positivement dans lesquels le ligand malonate reunit quatre centres metalliques. La connexion entre ces feuillets se fait soit par un anion malonate soit par une entite dimalonate de cuivre. La synthese et l'etude structurale d'un malonate bimalonate de lanthane ont egalement ete realisees. Ce compose presente un caractere monodimensionnel marque. Deux familles de squarates de lanthanoide et d'ammonium, dependant du rayon ionique de la terre-rare, ont ete mises en evidence et leurs structures cristallines determinees. L'une est monodimensionnelle avec developpement de chaines en zigzag, l'autre est bidimensionnelle avec presence de feuillets ; l'electroneutralite est assuree par les ions ammonium. La degradation thermique de ces complexes, sous atmosphere d'azote et de soufre permet d'obtenir les sesquisulfures, phase beta, du lanthane au gadolinium, ou les oxysulfures, du dysprosium a l'ytterbium, par traitement de deux heures a partir de 700c ; ce qui represente un avantage certain par rapport aux methodes conventionnellement employees. La phase haute temperature gamma du sesquisulfure de cerium (1200-1300c) peut etre utilisee en tant que pigment rouge, en remplacement du sulfoseleniure de cadmium qui tend a etre interdit. Nous avons reussi a stabiliser cette phase a l'aide de dopants judicieusement choisis vers 600c et a controler la morphologie des poudres obtenues. Cette partie de la these doit demeurer confidentielle

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Dissertations / Theses on the topic 'Squarate'

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