Zinc oxide, with its direct wide bandgap and high exciton binding energy, is a promising material for optoelectronic devices. Quantum confinement effect and high surface to volume ratio of the nanowires imparts unique properties to them and makes them appealing for researchers. So far, zinc oxide nanowires have been used to fabricate various optoelectronic devices such as light emitting diodes, solar cells, sensors and photodetectors. To fabricate those optoelectronic devices, many different synthesis methods such as metal organic chemical vapor deposition, chemical vapor deposition, pulsed laser deposition, electrodeposition and hydrothermal method have been explored. Among them, hydrothermal method is the most feasible one in terms of simplicity and low cost. In this thesis, hydrothermal method was chosen to synthesize zinc oxide nanowires. Synthesized zinc oxide nanowires were then used as electrically active components in light emitting diodes and ultraviolet photodetectors. Hybrid light emitting diodes, composed of inorganic/organic hybrids are appealing due to their flexibility, lightweight nature and low cost production methods. Beside the zinc oxide nanowires, complementary poly [2- methoxy -5- (2- ethylhexyloxy) - 1,4 -phenylenevinylene] MEH-PPV and poly (9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) hole conducting polymers were used to fabricate hybrid light emitting diodes in this work. Optoelectronic properties of the fabricated light emitting diodes were investigated. Zinc oxide emits light within a wide range in the visible region due to its near band edge and deep level emissions. Utilizing this property, violet-white light emitting diodes were fabricated and characterized. Moreover, to take advantage over the responsivity of zinc oxide to ultraviolet light, ultraviolet photodetectors utilizing hydrothermally grown zinc oxide nanowires were fabricated. Single walled carbon nanotube (SWNT) thin films were used as transparent electrodes for the photodetectors. Optoelectronic properties of the transparent and flexible devices were investigated. A high on-off current ratio around 260000 and low decay time about 16 seconds were obtained. Results obtained in this thesis reveal the great potential of the use of solution grown zinc oxide nanowires in various optoelectronic devices that are flexible and transparent.

No description available.

During his reign from 193-211, Septimius Severus was responsible for a significant building programme in the city of Rome. This involved both new buildings and the restoration of existing structures. Previous scholarship, however, has tended to consider specific buildings of the period in isolation instead of analysing Severus' building programme as a whole. The purpose of the present study is to redress this by examining the overall programme in the historical context of Severus' reign through archaeological investigations, studies of art and architectural history, epigraphy, numismatics, and the literary record. A framework for the motivation behind Severus' building programme may be established by relating the types of buildings constructed anew or restored to what is known of his reign through other sources. Severus wished to portray himself as the rightful heir of the Antonines who had been chosen by divine providence to establish a renewed period of peace and prosperity. Through his building activity he exploited important institutions to underline this position and to legitimize his rule. By his concern for the physical fabric of the capital he at the same time reinforced the message that he had restored the prestige of the Empire. The importance attached to this restoration is attested by the numerous inscriptions placed throughout the city on the restored buildings and other structures proudly announcing the attentions of the new emperor. Much of the Severan enhancement and restoration seems to have been geared toward the celebration of the Secular Games in the capital, an event that heralded a new age of renewal and restoration. Severus' intention of establishing a new dynasty was also implicit in the creation of an architectural presence within the heritage of the imperial city. The use of a building programme within the capital to reinforce the policies of the emperor originated with the first emperor, Augustus. While not on the same scale as the Augustan redevelopment of the city, Severus' building activity followed this imperial tradition with a deliberate and concerted building programme that reflected his propagandistic aims.

This study presents a systematic analysis of motifs, literary devices, and language in the Fourth Gospel that resemble similar motifs, literary devices, and language in Socratic tradition. The persistent recurrence of words and patterns of thought in the Fourth Gospel which are common to Platonic philosophy, Socratic progymnasmata, and well-known descriptions of Socrates’ moral heroism and martyr’s death lead me to conclude that the Johannine authors imagined Socrates’ life as a “pagan prophetic theme” which Jesus fulfilled; their use of Socratic tradition in the Fourth Gospel is subtle but obvious, and was used to appeal to a pagan or highly hellenized audience intimately familiar with Socratic tradition as the embodiment and articulation of social and religious values in the Hellenistic period. Much of the study is devoted to literary analysis of the Fourth Gospel, and draws upon the rhetorical criticism models developed by George Kennedy. Through rhetorical criticism the educational background of the Johannine writers becomes clear, as do their evangelical motives in appropriating Socratic tradition for their invention of Jesus’ speeches and martyrdom. / Department of Modern Languages and Classics

This thesis examines Greeks who in the fourth century B.C. did not live in the sovereign city- and town-sized communities in which most inhabitants of South Greece spent their lives. In it I argue that the number of Greeks living outside these communities increased very significantly during this period. I examine what Greek cities were destroyed and what Greek cities were founded in the fourth century, considering wherever possible how many Greeks are likely to have been added to or taken from the number of stateless Greeks by these destructions and foundations. I argue that until Alexander the Great and Timoleon began large programmes of settlement in the East and West respectively, there were probably many more Greeks losing their city homes than finding new ones (and that this is in contrast to the position before 400 B.C.). I consider the increasing numbers of Greek mercenaries, pirates, skilled workers and traders. Though people of widely differing kinds entered these occupations, I suggest that the way in which they all grew simultaneously in the fourth century indicates that the movement towards living outside cities was not entirely a response to difficult political circumstances in cities. Though some who were outside cities were so perforce, nevertheless an ideology which treated loosening of city ties as normal was being developed and was contrary to the established ideology whereby πόλις life was definitive of normal Greek life. I suggest that the availability of a large number of people with specialist skills from soldiering to diplomatic and literary skills created a world fit for Hellenistic Kings to live in. They could easily find recruits for their armies and courts. This contributes to explaining how Alexander and his Successors managed to conquer and subdue all Greece, which no power had previously done.

This thesis applies to Archaic Greek literature the medievalist's concept of "women's songs," that is, love-poems given to a female persona and composed in a popular register. In the Greek context a distinct type can be recognised in poems of women's affections (not necessarily love-poems as such) composed in an ingenuous register and created for performance, choral or solo, within a women's thiasos. The poems studied are those of Sappho, along with the few surviving partheneia of Alcman and Pindar. The feminine is constructed, rather mechanically by Pindar, more subtly by the other two, from a combination of tender feeling, personal and natural beauty, and an artful artlessness. / It is not possible to reconstruct a paradigmatic thiasos which lies behind the women's songs, but certain characteristic features merge, especially the pervasiveness of homoerotic attachments and the combination of a personal, affective, with a social, religious function. In general, women's groups in ancient Greece must have served as a counterbalance to the prevailing male order. However, while some of the women's thiasoi provide a vehicle for the release of female aggression, the function of the present group is essentially harmonious and integrative.

No description available.

In this study, barium strontium titanate (BST) thin films with different compositions (Ba0.9Sr0.1TiO3, Ba0.8Sr0.2TiO3, Ba0.7Sr0.3TiO3, Ba0.5Sr0.5TiO3) were produced by chemical solution deposition technique. BST solutions were prepared by dissolving barium acetate, strontium acetate and titanium isopropoxide in acetic acid and adding ethylene glycol as a chelating agent and stabilizer to this solution, at molar ratio of acetic acid/ethylene glycol, 3:1. The solution was then coated on Si and Pt//Ti/SiO2/Si substrates at 4000 rpm for 30 seconds. Crack-free films were obtained up to 600 nm thickness after 3 coating &amp / #8211 / pyrolysis cycles by using 0.4M solutions. Crystal structure of the films was determined by x-ray diffraction while morphological properties of the surface and the film-substrate interface was examined by scanning electron microscope (SEM). Dielectric constant, dielectric loss and ferroelectric parameters of the films were measured. Sintering temperature, film composition and the thickness of the films were changed in order to observe the effect of these parameters on the measured electrical properties. The dielectric constant of the films was decreased slightly in 1kHz-1 MHz range. It was seen that dielectric constant and loss of the films was comparable to chemical solution deposition derived films on literature. Maximum dielectric constant was obtained for the Ba0.7Sr0.3TiO3 composition at a sintering temperature of 800&amp / #730 / C for duration of 3 hours. Dielectric constant increased whereas dielectric loss decreased with increasing film thickness. BST films have composition dependent Curie temperature. For Ba content greater than 70 %, the material is in ferroelectric state. However, fine grain size of the films associated with chemical solution deposition and Sr doping causes the suppression of ferroelectric behaviour in BST films. Therefore, only for Ba0.9Sr0.1TiO3 composition, slim hysteresis loops with very low remanent polarization values were obtained.

Ruthenium(III) acetylacetonate was employed for the first time as homogeneous catalyst in the hydrolysis of sodium borohydride. Ruthenium(III) acetylacetonate was not reduced by sodium borohydride under the experimental conditions and remains unchanged after the catalysis, as shown by FT-IR and UV-Vis spectroscopic characterization. Poisoning experiments with mercury, carbon disulfide or trimethylphosphite provide compelling evidence that ruthenium(III) acetylacetonate is indeed a homogenous catalyst in the hydrolysis of sodium borohydride. Kinetics of the ruthenium(III) acetylacetonate catalyzed hydrolysis of sodium borohydride was studied depending on the catalyst concentration, substrate concentration and temperature. The hydrogen generation was found to be first order with respect to both the substrate concentration and catalyst concentration. The activation parameters of this reaction were also determined from the evaluation of the kinetic data: activation energy / Ea = 25.6 &amp / #61617 / &amp / #61472 / 1.3 kJ.mol-1, the enthalpy of activation / &amp / #8710 / H# = 24.6 &plusmn / 1.2 kJ.mol-1 and the entropy of activation &amp / #8710 / S# = -170 &plusmn / 5 J&amp / #61655 / mol-1&amp / #61655 / K-1. Ruthenium(III) acetylacetonate provides the lowest activation energy ever found for the hydrolysis of sodium borohydride. Ruthenium(III) acetylacetonate was found to be highly active catalyst providing 1183 total turnovers in the hydrolysis of sodium borohydride over 180 min before they are deactivated. The recorded turnover frequency (TOF) is 6.55 min-1.

Thesis (PhD)--Macquarie University, Division of Humanities, Department of Ancient History, 2002. / Bibliography: leaves 411-439. / Athenian politics and politicians -- Athenian political ideology -- A prosopographical study of the leading Athenian politicians -- Conclusion. / This thesis is a revisionist history of Athens during the much-neglected period between the Lamian and Chremonidean wars. It draws upon all the available literary and epigraphical evidence to provide a reinterpretation of Athenian politics in this confused period. -- Rather than providing a narrative of Athens in the early Hellenistic period (a task which has been admirably completed by Professor Christian Habicht), this thesis seeks to provide a review of Athenian politics and politicians. It seeks to identify who participated in the governing of Athens and their motivations for doing so, to determine what constituted a politician in democratic Athens, and to redefine political ideology. The purpose of this research is to allow a clearer understanding of the Athenian political arena in the early Hellenistic period. -- This thesis is comprised of three sections: -The first provides a definition of what constituted a politician in democratic Athens and how Athenian politicians interacted with each other. -The second discusses Athenian political ideology, and seeks to demonstrate that the Athenian politicians of the early Hellenistic period were just as ideologically motivated as their predecessors in the fifth and fourth centuries. This section seeks to show that the much-maligned Hellenistic democracies were little different from the so-called "true" democracies of the Classical period. The only real difference between these regimes was the fact that whereas Classical Athens was militarily strong and independent, Hellenistic Athens lacked the military capacity to remain free and independent, and was incapable of competing with the Macedonian dynasts as an equal partner. -The third section consists of a series of detailed prosopographical studies of leading Athenian politicians including Demades, Phokion, Demetrios of Phaleron, Stratokles, and Demochares. The purpose of this section is to evaluate the careers of these politicians who played a pivotal role in Athenian politics in order to enable us to better understand the nature of Athenian politics and political ideology in this period. -This thesis also includes an appended list of all the Athenians who meet my definition of a "politician" in democratic Athens. -- The overall aim of this thesis is to demonstrate that there was no real qualitative difference between Athenian democracy in the period between the Lamian and Chremonidean wars and the fifth and fourth century democracies. / Mode of access: World Wide Web. / viii, 439 leaves ill