Economic literature contains a great deal of discussion about the separation of the control of industrial firms from the ownership of the stock in these firms. This paper deals with the recent growth of the institutional investors and how these investors, acting together, could by voting the stock they hold in their portfolios control the industrial firms. Control would be aided by the institutional officers who are directors of the industrial firms. The institutional investors have cause to act together in that they are paid on the basis of funds managed, which is determined by portfolio performance. Each institution controls stock in several firms in the same industry. In many cases, financial institutions are the largest stockholders in other financial institutions. The financial institutions have director interlocks with other financial institutions and many industrial firms. It is expected that the financial controllers would desire the firms in an industry to perform similarly. The similar performance would serve to maintain or enhance the stock valuation of all firms in the financial controllers' portfolios. Control would be effected by the directors of the firm acting on the officers of the firm. Information about other firms in the industry could be passed among firms by means of their interlocking directorates. The financial controllers should take action on the officers of the firm by removing them from office in the year of or the year following poor profit performance. The compensation of the officers of the firm will be dependent on firm performance for the bonuses and stock options that comprise the majority of their compensation. The variability and quantity of this compensation will depend on the level of financial control. Regressions testing the effect of financial control on executive tenure and compensation were inconclusive. Compensation does vary with performance; officers do leave firms in years of poor profits. The financial control variables do not always aid in the explanation of this phenomenon. Financial control should be good in that the desire of the financial controllers, increased stock values, is the same as the desire of the beneficial owners of the stock. Even though ownership and control are separated, the desire of the stockholder is met. / Ph. D.

This study, based upon data obtained from a more encompassing research endeavor (Virginia Game Warden Project, Hatch Act, Project Number 616236), identifies and explores the nature of various occupational roles of selected Virginia Game Wardens. Only those wardens holding the rank of Area Patrol Leader or Regular Warden are included in the analysis (N=67). The methodology utilizes a variety of research techniques to obtain data from wardens (selected by enumerative and random sampling procedures) which include: (1) in-depth interviewing based on a structured interview schedule, (2) a self-administered questionnaire, (3) tape recording formal and informal conversations, and (4) direct observation of the activities of particular wardens. The roles which wardens perform are found to include: (1) wildlife law enforcement, (2) conservation activities, (3) education and public relations, and (4) a host of "other" related behaviors, including investigation of hunting and boating accidents and search and rescue work. The "master role" of wardens is found to be one of law enforcement, in that most wardens consider this to be the main aspect of their job, spend more work time engaging in such efforts, and indicate a preference for law enforcement activities over the others they perform. The law enforcement behavior of wardens involves an array of techniques employed to apprehend wildlife law violators. Primary among these are observation, patrol, the use of informers, and a variety of techniques the wardens identify as "sneaky". The wardens surveyed pride themselves on their ability to apprehend wildlife law violators at the most unexpected times and in the most remote geographical regions of the Commonwealth. The wardens' attitudes toward violators are, however, basically lenient. Only specific offenses, including spotlighting, intentional violations, and market poaching, prompt the wardens to attach the "criminal" label to offenders. A serendipitous finding of the study demonstrates that wardens experience a high degree of job satisfaction. Over three-quarters of the wardens surveyed would choose the same occupation again. In addition, on an eighteen item Index of Job Satisfaction, with a range of possible scores from eighteen to ninety (the higher the score the higher the satisfaction) the average total score for the sample was sixty-nine point six (69.6). It is hypothesized that this high level of job satisfaction is associated with a lack of constant supervision and coercion, a variety in work tasks, perceived meaningful work, and lack of isolation in work performance. Descriptive statistical and observational data are presented to strengthen this claim. The wildlife law enforcement behavior of wardens is compared to police roles previously explicated by other writers. While such models hold some utility for such comparative efforts, the isomorphic fit is far from exact. The development of other, more occupationally specific, typologies is suggested. / Ph. D.

This study focuses on the representative nature of the Senate Judiciary Committee in relation to the Senate as a whole. Three definitions of representation (descriptive, symbolic and instrumental) were used in order to assess the degree to which the Senate Judiciary Committee represented the Senate in the area of civil rights from 1957 through 1968. Results show that the Committee was not representative in the descriptive (regional) sense, but it was representative of the Senate in terms of its over-all descriptive (orientations) nature. In terms of symbolic representation, the study whows that the Senate Judiciary Committee has been labeled by the Senate as being "resistant" in the area of civil rights. This was interpreted as being a negative classification of symbolic representation. In the instrumental sense the Committee was not found to represent the Senate. The reasons for this overall lack of representation were attributed to two factors: (1) the lack of any institutionalized form of elections as sanctions for the lack of representation; and (2) the degree of social pluralism that is reflected in the membership of the Committee as a result of the type of issue at hand. / Master of Arts

Once a reactor is critical and at a constant power level, the net reactivity at any time is zero. The major contributions to changes of reactivity in the V.P.I. Argonaut reactor are: 1) Fuel and coolant temperature changes 2) Graphite temperature changes 3) Xenon poisoning The control rods have to be continuously positioned so that the total reactivity change of these parameters is nullified. The reactivity effects of the fuel and coolant have been combined into one temperature coefficient because for this investigation they are assumed to have simultaneous temperature changes. An experiment was conducted to measure the temperature coefficient of fuel and coolant which was found to be negative. The temperature coefficient for graphite was measured by installing heaters in two graphite blocks which were placed in the core. This experiment showed the reactivity effect of the graphite to be positive. The reactivity effect due to xenon poisoning was calculated using the xenon-iodine equations. The results of these experiments and calculations were used to predict the position of the control rods during long power operation. The predicted position was in good agreement with the actual position. / Master of Science

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal. / L'algue unicellulaire Gonyaulax polyedra est notre modèle pour l'étude des mécanismes reliant l'horloge interne aux rythmes circadiens observés. La bioluminescence, présente lors de la phase de nuit, ainsi que la division cellulaire observée au début de la phase de jour sont les deux rythmes sur lesquels porte la présente étude. Chez Gonyaulax, la présence des protéines LBP et luciférase, limitée à la phase obscure, permet la production de lumière. Une régulation au niveau de la traduction par une protéine inhibitrice CCTR se fixant en région 3 de l'ARNm LBP permet l'expression cyclique de la protéine LBP in vivo chez Gonyaulax polyedra . La construction d'une banque d'ADNc dans un vecteur d'expression constitutive (le p425 GPD) représente l'outil nécessaire pour l'isolation d'un ADNc codant pour la protéine CCTR. Cette isolation repose sur un mécanisme moléculaire d'interaction in vivo de la protéine CCTR avec la région régulatrice de l'ARNm lbp annexée à un gène létal inductible (le gène GSP1) dans la construction du plasmide pCS7. La transformation de levure possédant le pCS7 avec la banque d'ADNc permettrait la production de CCTR actif dans la levure et ainsi l'inhibition de la traduction de l'ARNm GSP1 par fixation du CCTR à la région régulatrice de lbp. Le criblage d'une banque d'ADNc comportant 2,8 x 105clones a été effectué. La croissance de 127 colonies a été observée lors du premier criblage de la banque. Chaque colonie a été soumise à une extraction d'ADN plasmidique et les plasmides obtenus ont été utilisés pour une seconde transformation dans les levures porteuses du pCS7. Le second criblage nous a permis de constater qu'aucun de ces positifs ne peut produire une protéine CCTR fonctionnelle. Une contamination par des levures d'une autre souche ou par une source de carbone permettant la croissance (telle que le glucose), une présence de "révertants" ou le clonage d'un ADNc codant pour le facteur de sélection du pCS7 peuvent être à l'origine de ces "faux positifs" obtenus. La production de clones supplémentaires afin d'augmenter statistiquement les chances de représentation d'un gène impliqué dans la génération d'un rythme circadien, ainsi que la transformation répétée de la banque dans les mêmes cellules pour permettre de réunir les différentes composantes qui pourraient être nécessaires à la formation d'un CCTR actif, pourraient permettre d'isoler un ADNc codant pour une protéine CCTR active. Chez la majorité des dinoflagellés on observe la présence d'une phase S dans le cycle cellulaire. De plus, chez Gonyaulax, la division cellulaire est limitée à l'aurore. Il est donc probable que la protéine kinase p34œk2qui régule la formation de l'hétérodimère MPF (impliqué dans l'initiation de la division cellulaire) soit également sujette à une régulation par l'horloge circadienne. L'isolation d'un homologue de la protéine kinase p34ede2repose sur une technique de clonage par compensation d'une mutation. Les levures de la souche cdc28 ne peuvent se diviser normalement à température restrictive de 34°C à cause d'une mutation thermosensible de la protéine kinase p34edc2. La transformation de la banque d'ADNc construite dans des levures de cette souche, puis l'incubation à température restrictive, permet le criblage pour un homologue de la p34cdc2. Le premier criblage de la banque a permis la croissance de sept colonies qui ont toutes été soumises à une extraction d'ADN plasmidique puis à une retransformation dans les cellules de la souche cdc28. Aucun des positifs n'a franchi le seuil de ce second test. Le criblage de clones supplémentaires ou encore le criblage pour un homologue de la cycline (la seconde composante du MPF) pourrait permettre d'isoler directement ou indirectement l'homologue de la p34cdc2.