The subject of the legal status of the aircraft commander is to a large extent regulated by all national legal systems. A number reasons have led authorities in each country to legislate on aviation on military grounds as well as for safety reasons. All this, in turn, has given rise to a bewildering variety of rules on the subject. The aircraft commander is essentially destined to act beyond national boundaries and thus under different jurisdictions. Needless to say, this situation causes great concern since the powers and duties of the commander are bound to change according to the provisions of each national legal system.

Airlines in Canada and the United States of America desiring to purchase commercial aircraft are confronted today with serious legal and financial problems. In general, the financial problems in both countries are related to the fact that the cost of new equipment is very high in proportion to airline earnings. The earnings of the United States trunklines for the year 1960 are estimated to be about $4 million, at the lowest point since 1949. In the face of competition and technological advances, airlines have been forced to re-equip their fleets with jets and turbo-prop aircraft.

Depuis toujours, l'homme a envié la facilité avec laquelle l'oiseau se meut dans les airs, et inlassablement il fait des recherches et des expériences qui lui permettraient d'en faire autant. A l'heure actuelle, de véritables cargos volants, pesant plus de 100 tonnes, se déplacent dans l'air à des vitesses 2 ou 3 fois supérieures a' celle du son. Mais l'avion à ailes fixes n'est pas la solution suprême que recherche l'homme, parce qu'il ne pourra jamais se libérer de certaines servitudes qui lui sont inhérentes: il est et restera esclave de la vitesse et de l'infrastructure.

The purpose of this paper is to deal with air carrier liability under Turkish Law. Certainly under usual circumstances such a study should not be a difficult one but following particularities of Turkish Civil Aviation have caused to be charged some heavy burdens on the author : [...]

Trade shows, a powerful tool to introduce and sell products and services, need to attract, hold, persuade and inform visitors. In trade shows, well-designed social spaces can facilitate active communications and interactions between exhibitors and visitors. Besides being amenities to retain visitors, social spaces can balance or re-stimulate visitors’ emotion. Based on the interdisciplinary exploration of urbanism, environmental psychology, and exhibition design, the practicum proposes a new strategy of organization for exhibition layout, structured by social spaces in various scales and levels. Case studies of existing trade shows identify the context and design factors in existing social spaces. The understanding of human behaviour and activities determines an appropriate configuration of social spaces. Systematic programming will delineate the context relating to the practicum topic. The final product is to find appropriate solutions and approachable settings to develop effective social spaces within a public trade show, improving the comprehensive quality of exhibitions.

This thesis deals with heating of outowing oxygen ions at high altitude above the polar cap using data from the Cluster spacecraft. oInospheric plasma may flow up from the ionosphere but at velocities which are low enough that the ions are still gravitationally bound. For the ions to overcome gravity, further acceleration is needed. The cusp/polar cap is an important source of outowing oxygen ions. In the cusp/polar cap, transverse heating is more common than eld-aligned acceleration through a magnetic eld-aligned electric eld. It is thus believed that transverse heating of ions is important for ion outow and one of the probable explanations for transverse heating is wave-particle interaction. A general conclusion from our work on high altitude oxygen ion energization is that ion energization and outow occur in the high altitude cusp and mantle. The particles are often heated perpendicularly to the geomagnetic eld and resonant heating at the gyrofrequency is most of the time intense enough to explain the observed O+ energies measured in the high altitude (8 { 15 Earth radii, RE ) cusp/mantle region of the terrestrial magnetosphere. The observed average waves can explain the observed average O+ energies. At lower altitude only a few percent of the observed spectral density around the oxygen gyrofrequency needs to be in resonance with the ions to obtain the measured O+ energies. A difference as compared to low altitude measurements is that we must assume that almost all wave activity is due to waves which can interact with the ions, and of these we assume 50 % to be left-hand polarized. We also have shown a clear correlation between temperature and wave intensity at the gyrofrequency at each measurement point. We have described the average wave intensity and corresponding velocity diffusion oeffcients as a function of altitude in a format convenient for modelers. Furthermore we have shown that the wave activity observed in this high altitude region is consistent with Alfven waves, and inconsistent with static structures drifting past the spacecraft. We have also shown how large the variability of the observed spectral densities is, and how sporadic the waves typically are. Based on three cases we have found that the regions with enhanced wave activity and increased ion temperature are typically many ion gyro radii in perpendicular extent.

A performance evaluation of CSTC (Cooperative Space Time Coding) with spatially cor-related fading and imperfect channel estimation in Gaussian as well as impulsive noise is presented. Closed form expressions for the pairwise error probability conditioned on the estimated channel gains are derived by assuming the components of the received vector are independent given the estimated channel gains. An expurgated union bound using the limiting before averaging technique given the estimated channel gains is then obtained. Although this assumption is not strictly valid, simulation results show that the bound is accurate in estimating the diversity order as long the channel estimation is not very poor. It is found that CSTC with block fading channels can reduce the frame error rate (FER) relative to SUSTC (Single User Space Time Coding) with quasi-static fading channels, even when the channel gains for each user are strongly correlated and when the channel estimations are very poor. A decision metric for CSTC with spatially correlated fading, imperfect channel estimation, and impulsive mixture Gaussian noise is derived which yields lower FERs than the Gaussian noise decision metric. Simulation results show that the FER performance of CSTC with mixture Gaussian noise outperforms CSTC with Gaussian noise at low SNR. At high SNR, the FER performance of CSTC with Gaussian noise is better than the FER performance of CSTC with mixture Gaussian noise due to the heavy tail of the mixture Gaussian noise.

Abstract is not available.

Bibliography: leaves 126-131. / 131 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Addresses the problem of obtaining exact solutions to Einstein's field equation describing rotating perfect fluids and also whether or not the known chaotic nature of geodesics in the relativistic fixed two centre problem is due to the non-linear nature of general relativity or the kinematic properties relativistic mechanics. The conclusion drawn from the two studies is that the properties of relativistic stationary axisymmetric spacetime are quite different from what is found in Newtonian physics. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 1999?

v, 96 leaves / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Computing Science, 1970