• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 9
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 14
  • 7
  • 7
  • 7
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 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

Dance iconography and the Indianisation of South East Asia, with special reference to ancient Indonesian temple sculpture

Lopez Y. Royo-Iyer, Alessandra A. A. January 1990 (has links)
This thesis explores the relevance of the study of dance images found on ancient Indonesian temples in relation to the process of development of the performing arts in the areas concerned. Dance is seen ~~linked with the spread of the Hindu/Buddhist religions from India to South East Asia, in this instance Indonesia. The formal and technical principles of dance would appear to be rooted in an aesthetic theory directly related to Hindu/Buddhist metaphysics, whereby all the arts and in particular the art of dance and sculpture are viewed as parallel. On this assumption, dance images, including reliefs and freestanding sculpture ,are yet another powerful visual expression of the conceptual parallelism underlined by such theories, represented by the Indian sastraic tradition. The function of dance images, by their very nature appears to be multiple. From a dance perspective through them information can be obtained on concurrent forms of performance; from the point of view of art history they contribute additional information on style and stylistic parallels or affinities of one monument with another. In this sense they bridge the gap between performing and visual arts, which in any case, at least in terms of theory, was never particularly demarcated within the spectrum of Hindu aesthetics. The thesis is divided into two parts. Part One deals with the historical background, examining issues such as the problem of Indian influence in South East Asia and Indonesia in particular. Dance and the performing arts are seen as playing an important role in terms of transmission of religious values and ideology and this role is highlighted. Links between the archipelago and particular Indian regions are explored; in Part Two, the cultural and religious influence or connection is examined and a detailed methodology for the analysis of dance images is presented, by giving an account of the tradition of the Indian sastra-s and their codification of dance technique. An analysis of dance images from selected sites in Sumatra, Java and Bali is then submitted, with cross reference to some Indian ones, thought to have had a connection with Indonesia, in terms of stylistic parallelism. In the Conclusion, the threads are gathered, bringing all parts into relation: dance images are thus seen as linked with the development of the performing arts, charting in fact this development, and playing a not inconsiderable role in the process of socalled "Indianisation".
2

The sculpture collection of the Second Marquis of Rockingham at Wentworth Woodhouse

Mayor, Edward R. January 1987 (has links)
Apart from his patronage of George Stubbs, the second Marquis of Rockingham has been recognised almost exclusively for his patronage of Joseph Nollekens in the 1770's. This thesis attempts to correct such a narrow view and demonstrates that the Marquis was engaged in widespread patronage of sculptors in Italy and in England long before he met Nollekens, and that he established a sculptural environment at Wentworth Woodhouse and at Grosvenor Square which echoed his knowledge of ancient history and his love of the sculpture of Giambologna. The documentation of his entire collection of sculpture as it stood at the time of the Marquis's death in 1782 is here set out for the first time. The present writer's rediscovery of major items long missing from the collection has facilitated a reconstruction of the original ensemble in Wentworth's Marble Saloon, and adds to the published accounts of Cavaceppi's work for English patrons. The thesis examines the relationship between Augustan taste and ancient sculpture, and how it affected Rockingham as he experienced sculptural activities in London, Florence and Rome. It examines the extent to which he was fired to outdo his rival, Thomas Strafford, in the number and quality of works commissioned. The degree to which Rockingham responded to and patronised the arts generally is assessed alongside a consideration of biased criticism of him as a man who loved nothing but horses. The chronological development of the collection is charted, and its reflection of the eighteenth century mania for sculptures of Antinous is discussed. Later additions to the collection after 1782 are also documented. The published views of nineteenth century and modem commentators are set out in order to reveal the piecemeal and unbalanced nature 'of their assessments and offer various reasons for such a critically incomplete picture. Finally, an assessment of the quality and significance of Rockingham's sculpture collection, both in its day and now, is offered together with a catalogue of works and appendices documenting the original sources.
3

The cesnola sarcophagi : studies in Cypriot iconography and sculpture

Wilson, V. A. January 1972 (has links)
No description available.
4

Photocatalytic Carbon Dioxide Reduction In Liquid Media

Ipek, Bahar 01 April 2011 (has links) (PDF)
The aim of this study is to investigate and reveal challenges in photocatalytic CO2 reduction tests performed in liquid media. Effect of test conditions in photocatalytic studies are often underestimated with an assumption of negligible mass transfer limitations in observed rate results. In this study, effect of mass transfer limitations in liquid phase photocatalytic tests was revealed with stirring rate and gas hold-up time experiments performed with Pt/TiO2 and Cu/TiO2 catalysts. In addition, apparent activation energies of 12 and 19.5 kJ/mol found with Pt/TiO2 and Cu/TiO2 catalysts respectively indicate diffusion limitations which favor back oxidation reactions resulting in low reduction yields. Photocatalytic CO2 reduction reaction is named as Artificial Photosynthesis even though present artificial system does not have sophisticated transport and membrane systems which natural systems have. Similarities and differences between artificial and natural photosynthesis are studied in order to present ideas to improve present photocatalytic rates. Kinetic and microkinetic modeling of catalytic methanol production from CO2 hydrogenation on Cu surfaces were performed in order to have an idea about kinetic limitations at photocatalytic systems. Calculations were performed at temperatures and pressures at which photocatalytic studies are conducted. The results indicated that water has an inhibitory effect on methanol formation rates and higher pressures could be implemented in photocatalytic systems for higher rates. Another implication drawn from degree of rate control calculations is that H formation step plays an important role underlying the importance of water splitting in CO2 reduction reactions.
5

Phytoestrogen Contents Of Selected Foods

Gultekin, Esra 01 September 2004 (has links) (PDF)
Phytoestrogens are naturally occurring chemicals of plant origin that have the ability to cause estrogenic and/or anti-estrogenic effects due to their structural similarities to the human hormone oestradiol. It has been proposed that phytoestrogens protect against a wide range of ailments, including breast and prostate cancers, cardiovascular disease, osteoporosis, and menopausal symptoms. Daidzein, biochanin A and especially genistein which has been reported to be the most biologically active dietary phytoestrogen attract great deal of interest in today&rsquo / s researches. In this study, twenty different food items, including legumes, fruits, nuts and herbs, (haricot beans, chickpeas, green lentils, red lentils, soybeans, licorice root, yarrow, dried chestnuts, prunes, raisins, currants, black cumin, dried apricots, dried parsley, dried dates, dried figs, sage (from Aegean region), sage (from Mediterranean region), grapevine leaves, gilaburu) were selected. Following an extraction procedure employing acid hydrolysis and heating / they were analysed for their daidzein, genistein and biochanin A contents using a reversed-phase C18 column with linear gradient elution on a high-performance liquid chromatography (HPLC) coupled with diode-array detector (DAD). Soybeans were found to contain high amounts of daidzein (91.36 mg/100 g) and genistein (85.57 mg/100 g). Chickpeas were found to contain much less amount of genistein (0.89 mg/100 g) compared with that of soybeans and also biochanin A (0.95 mg/100 g) which was not detected in soybeans. None of daidzein, genistein and biochanin A was detected in the remaining eighteen food items.
6

Preparation Of Boron-zirconium Co-doped Photocatalytic Titanium Dioxide Powder

Tokmakci, Tolga 01 January 2013 (has links) (PDF)
A titanium dioxide powder co-doped with boron and zirconium was prepared by mechanical ball milling. Photocatalytic performance of the powder was evaluated by degradation of methylene blue (MB) solution under UV illumination. XRD patterns were refined by Rietveld analysis method to obtain accurate lattice parameters and position of the atoms in the crystal structure of TiO2. XRD analysis indicated that the B and/or Zr doped TiO2 powders composed of anatase and did not exhibit any additional phase. Rietveld analysis suggested that dopant B and Zr elements were successfully weaved into crystal structure and distorted the lattice of TiO2. The highest distortion was obtained by co-doping. SEM investigations confirmed that mechanical ball milling technique led to a decrease in particle size of TiO2 powder. XPS analysis revealed that dopant B and Zr atoms did not appear in any form of compound including Ti and O elements. Results of photocatalytic activity test suggested that boron and zirconium co-doped TiO2 particles exhibited a better visible light response and photocatalytic activity than that of mono element doped TiO2 (i.e. B-TiO2 and Zr-TiO2) and undoped TiO2 particles. A 20% improvement in photocatalytic activity of reference TiO2 powder (powder ball milled without dopant addition) was achieved by B and Zr co-doping. The enhanced photocatalytic activity is attributed to synergistic effects of B-Zr co-doping the lattice of TiO2 as well as particle size reduction.
7

Photocatalytic Activity Of Titania

Bayram, Bilal 01 September 2009 (has links) (PDF)
TiO2 in anatase form is the most widely studied material for photocatalytic reactions. Utilization of oxide support materials such as silica with suitable transparency within band gap range of TiO2 is promising technique to obtain efficient photocatalysts for many applications. In the present study, simultaneous co-hydrolyzation of tetraethyl orthosilacate (TEOS) and titanium tetrabutaoxide (TBOT) precursors were carried out in the presence of hydrochloric acid. The effects of washing with low vapor pressure solvent(n-octane), drying conditions, hydrothermal ageing and TiO2/SiO2 ratio on the catalyst structure and photocatalytic activity were studied. The samples were characterized by XRD, BET, DRIFTS techniques and the activity was measured for liquid phase room temperature oxy/demineralization of phenol under artificial solar irradiation. The reaction intermediates were followed by UV/vis spectrophotometer and HPLC. It was found that the hydrothermal treatment contributes better degree of crystalinity, higher surface area and thus photocatalytic activity compared to the samples which were synthesized with conventional drying at 100oC overnight. The formation of Ti-O-Si interface indicating the degree of dispersion was evidenced by DRIFTS technique for all hydrothermally tretated samples. The highest surface area and photocatlytic activity was observed with hydrothermally treated catalyst with TiO2/SiO2:0.34 composition.
8

Long Wavelength Photosensitizers With Benzotriazole And Benzimidazole Skeletons For Cationic Polymerization

Yilmaz, Seda 01 July 2011 (has links) (PDF)
Benzimidazole and benzotriazole derivatives, 4-(2,3-Dihydrothieno[3,4-b][1,4] dioxin-5-yl)-7-(2,3-dihydrothieno[3,4b][1,4]dioxin-7-yl)-2-benzyl-1H-benzo[d] imidazole (BIm-Ed), 2-benzyl-4,7-di(thiophen-2-yl)-2H-benzo[d] [1,2,3] triazole (BBTS), and 2-benzyl-4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2Hbenzo[ d] [1,2,3] triazole (BBTES) were employed as photosensitizers for diaryliodonium salt photoinitiators in cationic photopolymerization of various epoxide and vinyl ether monomers. Diphenyliodonium hexafluorophosphate (Ph2I+PF6&macr / ) salt was used as the photoinitiator in this study. Extended conjugation and electron-rich moieties of the photosensitizers enabled the use of long wavelength UV and visible light emitting light sources in cationic photopolymerizations. Polymerizations were achieved at room temperature and monitored by optical pyrometry. Photopolymerization of a diepoxide monomer with ambient solar irradiation was examined.
9

Photocatalytic Properties Of Silver Loaded Titanium Dioxide Powders Produced By Mechanical Ball Milling

Aysin, Basak 01 February 2012 (has links) (PDF)
Silver (Ag) was loaded to three different kinds (P-25, NT-22, and TiO(OH)2) of titanium dioxide (TiO2) powders through adding three different quantities (4.6, 9.2, and 13.8 ml) of silver nitrate (AgNO3) solution by mechanical ball milling process. X-Ray diffraction analysis suggested that Ag was loaded on the TiO2 powders in the form of silver oxide (AgO). SEM, particle size, and BET surface area analyses revealed that TiO2 particles agglomerated after ball milling, resulting in the decrease of specific surface area of the TiO2 powders. Powders P-25, NT-22, and TiO(OH)2 degraded 94 %, 46 %, and 26 %, respectively of MO solution under 1 h UV irradiation. Increasing amount of Ag loading enhanced photocatalytic activity of TiO2 powders under UV irradiation. The best photocatalytic performance was achieved by 13.8 ml AgNO3 solution added NT-22 powders. Percent methyl orange (MO) degradation of 13.8 ml AgNO3 solution added P-25, NT-22, and TiO(OH)2 powders under 1 h UV irradiation was 85 %, 96 %, and 67 %, respectively. Contact angle measurements revealed that hydrophilic properties of TiO2 powders were also improved by Ag loading. Moreover, TiO2 powders gained antibacterial prospect after Ag addition. Ag loaded TiO2 powders could be used effectively for the applications requiring better photocatalytic activity and antibacterial effect.
10

General Ishii Shiro: His Legacy is That of Genius and Madman

Byrd, Gregory Dean 01 May 2005 (has links) (PDF)
This paper covers the development of the chemical weapons division founded by Ishii Shiro, and discusses the horrible experimentation that was done by the Japanese. These experiments have been a source of controversy. The Chinese feel the Japanese should acknowledge these as war crimes. When the Japanese left Manchuria, they left the world’s largest chemical waste dump behind, and even to this day the government refuses to admit the actions of Unit 731. The information on biological warfare that the Japanese discovered during the experimentation in China later was used as a negotiation tool with the United States to secure their freedom and gain immunity from prosecution for General Ishii Shiro and his men. This paper will show the evolution of Japanese biological warfare during WWII using research obtained from a wide range of documents, books, newspapers, and journal articles, as well as documents found at the National Archives.

Page generated in 0.0276 seconds