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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Development of plumb elevator shaft

Mesinovic, Elvedin, Ceric, Ermin January 2014 (has links)
This degree project is the final part of the bachelor in mechanical engineering at Linnaeus University in Växjö. The project has been accomplished at ALT Hiss AB in Alvesta. The company manufactures hydraulic elevators, less traction elevators and escalators. The purpose of this thesis has been to design a tool that plumbs the elevator shaft. The thesis has been completed with literature studies, interviews and data collections. The final concept sketch and idea drawing is presenting the result.
2

Síntese, estrutura e propriedades de complexos de molibdênio, prata e chumbo com ácido 'alfa'-hidroxicarboxílicos

Cuin, Alexandre [UNESP] 22 October 2004 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:35:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-10-22Bitstream added on 2014-06-13T19:44:56Z : No. of bitstreams: 1 cuin_a_dr_araiq.pdf: 4874246 bytes, checksum: d2682f8e4635d9604b952790ce19f2ee (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O presente trabalho tem como objetivo o estudo de complexos obtidos a partir da interação de ácidos a-hidroxicarboxílicos ou de seus respectivos sais, com óxidos de molibdênio e de chumbo e com o nitrato de prata. Os ácidos a-hidroxicarboxílicos utilizados foram os ácidos glicólico (C2H4O3), málico (C4H6O5), tartárico (C4H6O6) e mandélico (C8H8O3). Foram sintetizados treze compostos, sendo seis com o íon Mo(VI), quatro com o íon Ag(I) e três com o íon Pb(II). Além destes compostos, foram repreparados três compostos, (NH4)2[MoO2(C2H2O3)2]H2O, (NH4)2[MoO2(C8H6O3)2] e (NH4)2[MoO3(C4H4O6)] H2O. A partir destes três complexos foram obtidos óxidos (MoO3) com áreas superficiais entre 1,0 e 3,0 m2/g. Cinco compostos da série M2[MoO2(C2H2O3)2]nH2O, onde M = Li+, Na+, K+, Rb+ e Cs+; C2H2O3 2- = glicolato2- e n = 1 ou u, foram preparados a partir da adição de MoO3(s) em solução do sal alcalino desejado do ácido glicólico na proporção molar metal:ligante 1:2. Os compostos no estado sólido foram separados da solução por filtração após concentração e adição de etanol absoluto. Os compostos foram caracterizados por análise elementar, espectroscopia IV e difratometria de raios X. Foi realizado um estudo complementar de espectroscopia de RMN de 1H e de 13C para os compostos K2[MoO2(C2H2O3)2]H2O, K2[MoO2(C8H6O3)2] e K2[MoO3(C4H4O6)]H2O. Os compostos da série M2[MoO2(C2H2O3)2]nH2O são fotossensíveis à radiação UV, sendo o complexo K2[MoO2(C2H2O3)2]H2O, o que apresenta maior fotossensibilidade. O composto Na2[MoO2(C4H4O5)2]uH2O foi obtido a partir de MoO3 e ácido málico utilizando-se a metodologia descrita para os compostos da série M2[MoO2(C2H2O3)2]nH2O. O complexo obtido foi caracterizado por análise elementar, espectroscopia IV e difração de raios X. Com AgNO3 foram obtidos os complexos glicolato, malato, tartarato e mandelato de prata... / The aim of this work is study of solid complexes prepared by the reaction of a-hydroxycarboxilic acids or the respectives salts with molybdenum or lead oxides and silver nitrate. Glycolic (C2H4O3), malic (C4H6O5), tartaric (C4H6O6) and mandelic (C8H8O3) acids were the a-hydroxycarboxilic acids used in this work. Thirteen complexes were obtained: six complexes with Mo(VI), four complexes with Ag(I) and three complexes with Pb(II). The complexes (NH4)2[MoO2(C2H2O3)2]H2O, (NH4)2[MoO2(C8H6O3)2] and (NH4)2[MoO3(C4H4O6)] H2O were prepared again in order to measure specific area of the respective oxides after calcination. These three compounds led to the formation of MoO3 with superficial area ranging from 1.0 to 3.0 m2/g. The compounds of the series M2[MoO2(C2H2O3)2]nH2O, where M = Li+, Na+, K+, Rb+ and Cs+, C2H2O3 2- = glicolate2- and n = 1 or u, were synthesized in aqueous medium by the reaction of the respective salt of the glycolic acid with molybdenum trioxide. Molar ratio of 1:2 metal:ligand was used. The solution was concentrated until the formation of a viscous product. The solid complexes were obtained by addition of ethanol. The complexes were characterized by elemental analysis (C, H and O), thermal analysis (TG/DTA), infrared spectroscopy and X-ray diffractometry (powder method). An additional study using nuclear magnetic resonance spectroscopy (1H and 13C) was performed with K2[MoO2(C2H2O3)2]H2O, K2[MoO2(C8H6O3)2] and K2[MoO3(C4H4O6)]H2O. These compounds showed to be photosensitive to the UV radiation. The complex K2[MoO2(C2H2O3)2]H2O was the most photosensitive. The complex Na2[MoO2(C4H4O5)2]uH2O was obtained from MoO3 with malic acid by the use of the same methodology of synthesis of the complexes of type M2[MoO2(C2H2O3)2]nH2O. This complex was characterized by elemental analysis, infrared spectroscopy and X-ray diffractometry... (Complete abstract, click electronic address below)
3

Síntese, estrutura e propriedades de complexos de molibdênio, prata e chumbo com ácido 'alfa'-hidroxicarboxílicos /

Cuin, Alexandre. January 2004 (has links)
Orientador: Antonio Carlos Massabni / Banca: Wanda de Oliveira / Banca: Vânia Martins Nogueira / Banca: Luiz Antonio Andrade de Oliveira / Banca: Eduardo Joaquim de Souza Vichi / Resumo: O presente trabalho tem como objetivo o estudo de complexos obtidos a partir da interação de ácidos a-hidroxicarboxílicos ou de seus respectivos sais, com óxidos de molibdênio e de chumbo e com o nitrato de prata. Os ácidos a-hidroxicarboxílicos utilizados foram os ácidos glicólico (C2H4O3), málico (C4H6O5), tartárico (C4H6O6) e mandélico (C8H8O3). Foram sintetizados treze compostos, sendo seis com o íon Mo(VI), quatro com o íon Ag(I) e três com o íon Pb(II). Além destes compostos, foram repreparados três compostos, (NH4)2[MoO2(C2H2O3)2]H2O, (NH4)2[MoO2(C8H6O3)2] e (NH4)2[MoO3(C4H4O6)] H2O. A partir destes três complexos foram obtidos óxidos (MoO3) com áreas superficiais entre 1,0 e 3,0 m2/g. Cinco compostos da série M2[MoO2(C2H2O3)2]nH2O, onde M = Li+, Na+, K+, Rb+ e Cs+; C2H2O3 2- = glicolato2- e n = 1 ou u, foram preparados a partir da adição de MoO3(s) em solução do sal alcalino desejado do ácido glicólico na proporção molar metal:ligante 1:2. Os compostos no estado sólido foram separados da solução por filtração após concentração e adição de etanol absoluto. Os compostos foram caracterizados por análise elementar, espectroscopia IV e difratometria de raios X. Foi realizado um estudo complementar de espectroscopia de RMN de 1H e de 13C para os compostos K2[MoO2(C2H2O3)2]H2O, K2[MoO2(C8H6O3)2] e K2[MoO3(C4H4O6)]H2O. Os compostos da série M2[MoO2(C2H2O3)2]nH2O são fotossensíveis à radiação UV, sendo o complexo K2[MoO2(C2H2O3)2]H2O, o que apresenta maior fotossensibilidade. O composto Na2[MoO2(C4H4O5)2]uH2O foi obtido a partir de MoO3 e ácido málico utilizando-se a metodologia descrita para os compostos da série M2[MoO2(C2H2O3)2]nH2O. O complexo obtido foi caracterizado por análise elementar, espectroscopia IV e difração de raios X. Com AgNO3 foram obtidos os complexos glicolato, malato, tartarato e mandelato de prata... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The aim of this work is study of solid complexes prepared by the reaction of a-hydroxycarboxilic acids or the respectives salts with molybdenum or lead oxides and silver nitrate. Glycolic (C2H4O3), malic (C4H6O5), tartaric (C4H6O6) and mandelic (C8H8O3) acids were the a-hydroxycarboxilic acids used in this work. Thirteen complexes were obtained: six complexes with Mo(VI), four complexes with Ag(I) and three complexes with Pb(II). The complexes (NH4)2[MoO2(C2H2O3)2]H2O, (NH4)2[MoO2(C8H6O3)2] and (NH4)2[MoO3(C4H4O6)] H2O were prepared again in order to measure specific area of the respective oxides after calcination. These three compounds led to the formation of MoO3 with superficial area ranging from 1.0 to 3.0 m2/g. The compounds of the series M2[MoO2(C2H2O3)2]nH2O, where M = Li+, Na+, K+, Rb+ and Cs+, C2H2O3 2- = glicolate2- and n = 1 or u, were synthesized in aqueous medium by the reaction of the respective salt of the glycolic acid with molybdenum trioxide. Molar ratio of 1:2 metal:ligand was used. The solution was concentrated until the formation of a viscous product. The solid complexes were obtained by addition of ethanol. The complexes were characterized by elemental analysis (C, H and O), thermal analysis (TG/DTA), infrared spectroscopy and X-ray diffractometry (powder method). An additional study using nuclear magnetic resonance spectroscopy (1H and 13C) was performed with K2[MoO2(C2H2O3)2]H2O, K2[MoO2(C8H6O3)2] and K2[MoO3(C4H4O6)]H2O. These compounds showed to be photosensitive to the UV radiation. The complex K2[MoO2(C2H2O3)2]H2O was the most photosensitive. The complex Na2[MoO2(C4H4O5)2]uH2O was obtained from MoO3 with malic acid by the use of the same methodology of synthesis of the complexes of type M2[MoO2(C2H2O3)2]nH2O. This complex was characterized by elemental analysis, infrared spectroscopy and X-ray diffractometry... (Complete abstract, click electronic address below) / Doutor
4

Joseph Plumb Martin and the American Imagination

Manos, Peter John 01 December 2011 (has links)
No description available.
5

Určování astronomických tížnicových odchylek přímým měřením / Determination of astronomical vertical deflections by field observations

Petrová, Kateřina January 2017 (has links)
This thesis deals with use of the measuring system MAAS-1 for direct determination of vertical deviations at the points specified field. The main input data are geographical and astronomical coordinates of points. The aim of this thesis is to complete the processing of data measured in the locality.
6

Užití astronomické nivelace pro vytváření modelů kvazigeoidu / Use of Astronomical Levelling for Creation of Quasigeoid Models

Jurčík, Josef January 2012 (has links)
My master´s thesis deals with use of astronomical levelling for creation of quasigeoid models. The basic input dates are componets of astronomical-geodetic deflections of the vertical in points, which are determined on AGNES and VEVEŘÍ nets. The dates are adjust for determination of relative quasigeoid. In literature [4], there is simplified solution for adjustment of this dates. The thesis looks for the most comprehensive solutions of adjustment without simplification. The solutions are compared.

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