The solid state remote power controller: Its status, use and perspective

Solid state remote power controllers (RPC's) are now available to control and protect all types of loads in both ac and dc power distribution systems. RPC's possess many outstanding qualities that make them attractive for most system applications. A review is given of the present state-of-the-art and applications for solid state RPC's for both aerospace and terrestrial systems

Methods of space radiation dose analysis with applications to manned space systems

The full potential of state-of-the-art space radiation dose analysis for manned missions has not been exploited. Point doses have been overemphasized, and the critical dose to the bone marrow has been only crudely approximated, despite the existence of detailed man models and computer codes for dose integration in complex geometries. The method presented makes it practical to account for the geometrical detail of the astronaut as well as the vehicle. Discussed are the major assumptions involved and the concept of applying the results of detailed proton dose analysis to the real-time interpretation of on-board dosimetric measurements

The mathematical modelling of caking in bulk sucrose : this thesis is presented as partial fulfillment of the requirements for the degree of Master of Engineering in Bio process Engineering at Massey University

Ever since the need for bulk transportation of sugar, there have been problems with the product caking during storage and transportation. This project was carried out in order to try and understand the mechanisms behind caking, and by mathematically modelling the system, to find the conditions needed to avoid caking, and to compare these to the observations and experiences made by those working in the industry. A thermal analysis monitor was used to determine if significant quantities of amorphous sucrose existed on the dried sugar, to support the amorphous recrystallisation caking mechanism. The level of amorphous sucrose was found to be less than 0.1%, so it was reasoned that any moisture contribution from such a small fraction, even given its tremendously hygroscopic nature would be negligible in contrast to that from the humidity caking mechanism. The water activity at which capillary condensation begins to occur significantly was then investigated and found to be 0.8. At this critical water activity, significant capillary condensation between particles occurs, forming liquid bridges between the particles and causing the bed to lump. If the lumped bed is then subjected to an environment with a lower water activity, over time the liquid bridges will begin to crystallise, creating solid bridges between the particles. These solid bridges have several times the mechanical strength of the liquid bridges and it is at this point that the bed is considered to be caked. The data from this experiment was then further used to build a relationship between the water activity of a bed, the radius of the liquid bridges formed by capillary condensation (Kelvin radius), and the resulting lumped strength of the bed. A model based on the caking of lactose was then adapted for sucrose and validated by testing conditions of heat and moisture migration through a packed bed, and the resulting effect on the strength of caking. Various model parameters were then adjusted between experimentally known values in order to obtain the best-fit possible for the experimental data. The data from the experiment and the model agreed well, however the temperature data did exhibit some scatter, possibly caused by insufficient grounding of the measuring device, making it susceptible to noise. The model was then used to build up a graph of the effect of initial water activity, cold and hot temperatures on the maximum water activity that a bed would reach at the cold surface. Using the critical water activity, this graph can be used to represent the limits at which sucrose of a certain condition can be stored and transported without the sucrose caking. This also opens paths for future research, as this will allow conditions created by the changing of process conditions such as temperatures and residence times within the driers, to be measured in terms of whether the end product will have a tendency to cake

The Content of Several Measures of Social Desirability

The question of whether to remove socially desirable responding (SDR) variance from self-report personality inventories, or to treat it as a facet of personality, has been the center of a debate spanning the last 25 years (Furnham, 1986). Recently, this controversy again came to the forefront of the literature via an exchange between a group of researchers (Block, 1990; Edwards, 1990; Nicholson & Hogan, 1990; Walsh, 1990). The essence of this debate is whether the correlation between a SDR scale and a personality scale indicated that the personality scale is contaminated by SDR bias, or if it merely indicates that there is content overlap between the two types of scales

Temperature Inversions in the Pinyon-Juniper Zone of a Nevada Mountain Range

Prominent on the sides of the Great Basin mountain ranges of Nevada is an open woodland zone of small conifers in which the dominants are pinyon (Pinus monophylla T. and F.) and juniper (Juniperus osteosperma (Torr.) Little). It is apparent even to the casual observer that this dark green zone is almost entirely restricted to the slopes; the grayish sagebrush valley bottoms are treeless except for willows and cottonwoods along the drainages. Also treeless are most of the ridges and peaks which rise above the two or three thousand vertical feet covered by the woodland. Within the dwarf conifer zone, even small valleys, bowls, and flats are open and sage-brush-covered. Around the edges of most of the valleys and depressions, the bronze-green junipers form a prominent border with relatively few pinyons, but higher on the slopes the gray-green pinyon dominates, often in pure strands

The plant associations of the Carson Desert Region, western Nevada

Except for scattered references of a generalized nature, little is recorded concerning the structure of vegetation in the arid and semi-arid portions of the western Great Basin. The delineation of the associations\u27 of a part of this area and their particular environments is the prime function of this paper

Paul B. Sears: The Generalist as Teacher

Author Institution: Department of Botany, Duke UniversityPaul B. Sears’ early ecological interests continued to expand over 70 years into such areas as vegetation mapping, paleoecology, climate change and conservation. Few ecologists saw and understood the interactions of the earth’s biosphere in space and time as broadly as he did. He wrote that the laws of human society and those of nature often are not in harmony, and something must be done to ensure that the biosphere remains sustainable. His teaching started with his children; continued in the classroom and in one-to-one sessions with graduate students; and extended to his colleagues and the general public through his work in organizations, his lectures and his writing. Sears set an example for ecologists to act as citizens and teachers, as well as investigators

John E. Potzger 1886-1955

If there has ever been a story to inspire a new generation of students to do great things, it is the story of John E. Potzger. Here was a man who literally overcame every obstacle. His enthusiasm, scholarship, and hard work brought success in the form of lasting contributions to our knowledge of the world and in students who will carry on his work. It is men like Professor Potzger who make a university great; Butler University can take pride in the fact that it was here that his scientific career started, grew, and developed into maturity

Alien Registration- Billings, Herman W. (Madison, Somerset County)

https://digitalmaine.com/alien_docs/6774/thumbnail.jp

BAILMENTS-OWNER OF RAILROAD STATION LOCKERS AS BAILEE OF THE USER\u27S GOODS

Action was brought by the plaintiffs for the loss of a package of costume jewelry placed in a locker owned by the defendant company. The locker was of the type commonly found in railroad stations; one desiring to use it merely places his goods in the locker, inserts a coin, removes the key and retains it in his possession. Although the defendant kept a master key and reserved the right to remove any article which remained in the locker longer than the 24-hour rental period, it exercised no other control. On the other hand, the user had access to the locker and its contents at any time during the 24-hour period simply by using the key. Plaintiffs contended that there was a breach of a common law bailment on the part of the defendant and liability by the establishment of a prima facia case of negligence resulting from the failure to return the goods. Held, no liability. Marsh v. American Locker Co., (N.J. 1950) 72 A. (2d) 343