• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 31
  • 8
  • 8
  • 8
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • Tagged with
  • 85
  • 15
  • 9
  • 9
  • 9
  • 8
  • 8
  • 8
  • 7
  • 7
  • 6
  • 6
  • 6
  • 6
  • 5
  • 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.
31

The administration of governor Ralph F. Gates of Indiana, 1945-1949

Siefert, Thomas' Eugene January 1970 (has links)
Ralph F. Gates was governor of Indiana from 1945 to 1949 when events following the end of World War II forced Hoosiers to make many crucial decisions concerning the role of state government. Gates was the first Republican governor of Indiana since the Depression and he was one of the few Hoosier governors to have effective majorities in two successive General Assemblies. This study analyzes the achievements of the Gates administration by focusing upon Gates' pledges in his 1944 campaign and his success in implementing those pledges.Campaign press releases and the 1944 Indianapolis newspapers identified the issues Gates had stressed during the campaign. Gates emphasized the need for state and federal cooperation in helping veterans adjust to peacetime conditions; industrial expansion to assure continued economic growth and prosperity; additional personnel and facilities for Indiana's public education and public health programs so as to furnish expanded services; and efficient and economic administration of state government.Official state documents furnished information concerning the achievements of the Gates administration. The single most important achievement in the area of veterans' affairs was the creation of the Department of Veterans' Affairs. This new state department helped approximately 300,000 Hoosier veterans adjust to civilian life.Several new state agencies encouraged industrial expansion and aided in providing jobs for the returning veterans. The Department of Commerce and Public Relations helped attract to Indiana 300 new industries which employed nearly 30,000 Hoosiers. A reorganized State Highway Commission spent $78,000,000 in three years to improve the state highway system. To help relieve the increasing congestion on the state's highways, the new Aeronautics Commission of Indiana sought to develop a state-wide system of aviation.Indiana's growth and prosperity was ultimately reliant upon a strong educational system. To help attract qualified teachers, the state's minimum salary schedule was amended so that a beginning teacher could earn $2,400 for a nine month school year. The state almost doubled its amount of local school support from $24,700,000 in 1943-1944 to $48,800,000 in 1947-1948. Local school districts were given additional powers of taxation. The State Board of Education was reorganized and given additional powers concerning textbook adoptions and federal school lunch programs. Finally, the state appropriated approximately $45,000,000 to help the four state colleges and universitiesprovide for increased enrollments.In the area of public health, the State Board of Health was reorganized and an Indiana Council for Mental Health was created. The licensing of all hospitals in the state was required for the first time and a coordinated plan for hospital construction was developed. Over $8,000,000 was appropriated to construct new public health facilities, and the establishment of full-time local health offices was encouraged through legislation authorizing adjacent counties or cities and counties to combine to offer full-time health offices.Although they increased state services, Gates and his Republican associates managed to keep the budget balanced by improving governmental efficiency and raising taxes on alcoholic beverages and cigarettes. His achievements establish that Gates did indeed accomplish what he had pledged in the areas of veterans' affairs, economic readjustment, public education, public health, and fiscal and administrative affairs.
32

User experience driven CPU frequency scaling on mobile devices : towards better energy efficiency

Seeker, Volker Günter January 2017 (has links)
With the development of modern smartphones, mobile devices have become ubiquitous in our daily lives. With high processing capabilities and a vast number of applications, users now need them for both business and personal tasks. Unfortunately, battery technology did not scale with the same speed as computational power. Hence, modern smartphone batteries often last for less than a day before they need to be recharged. One of the most power hungry components is the central processing unit (CPU). Multiple techniques are applied to reduce CPU energy consumption. Among them is dynamic voltage and frequency scaling (DVFS). This technique reduces energy consumption by dynamically changing CPU supply voltage depending on the currently running workload. Reducing voltage, however, also makes it necessary to reduce the clock frequency, which can have a significant impact on task performance. Current DVFS algorithms deliver a good user experience, however, as experiments conducted later in this thesis will show, they do not deliver an optimal energy efficiency for an interactive mobile workload. This thesis presents methods and tools to determine where energy can be saved during mobile workload execution when using DVFS. Furthermore, an improved DVFS technique is developed that achieves a higher energy efficiency than the current standard. One important question when developing a DVFS technique is: How much can you slow down a task to save energy before the negative effect on performance becomes intolerable? The ultimate goal when optimising a mobile system is to provide a high quality of experience (QOE) to the end user. In that context, task slowdowns become intolerable when they have a perceptible effect on QOE. Experiments conducted in this thesis answer this question by identifying workload periods in which performance changes are directly perceptible by the end user and periods where they are imperceptible, namely interaction lags and interaction idle periods. Interaction lags are the time it takes the system to process a user interaction and display a corresponding response. Idle periods are the periods between interactions where the user perceives the system as idle and ready for the next input. By knowing where those periods are and how they are affected by frequency changes, a more energy efficient DVFS governor can be developed. This thesis begins by introducing a methodology that measures the duration of interaction lags as perceived by the user. It uses them as an indicator to benchmark the quality of experience for a workload execution. A representative benchmark workload is generated comprising 190 minutes of interactions collected from real users. In conjunction with this QOE benchmark, a DVFS Oracle study is conducted. It is able to find a frequency profile for an interactive mobile workload which has the maximum energy savings achievable without a perceptible performance impact on the user. The developed Oracle performance profile achieves a QOE which is indistinguishable from always running on the fastest frequency while needing 45% less energy. Furthermore, this Oracle is used as a baseline to evaluate how well current mobile frequency governors are performing. It shows that none of these governors perform particularly well and up to 32% energy savings are possible. Equipped with a benchmark and an optimisation baseline, a user perception aware DVFS technique is developed in the second part of this thesis. Initially, a runtime heuristic is introduced which is able to detect interaction lags as the user would perceive them. Using this heuristic, a reinforcement learning driven governor is developed which is able to learn good frequency settings for interaction lag and idle periods based on sample observations. It consumes up to 22% less energy than current standard governors on mobile devices, and maintains a low impact on QOE.
33

A critical analysis of decentralization in Zimbabwe: focus on the position and role of a Provincial Governor

Chigwata, Tinashe January 2010 (has links)
Magister Philosophiae - MPhil / Provincial governors constituted an important part of the decentralization package unveiled in Zimbabwe in 1984 and 1985. The President appoints provincial governors among other duties, to coordinate development planning and implementation at the provincial level. This paper seeks to examine the appointment and role of a provincial governor and in that way establish the extent to which such appointment and role hinder or enhance representative and participatory democracy, accountability, devolution and empowerment, as ideals of decentralization. This contribution examines provincial governance in Zimbabwe as part of the local government system. / South Africa
34

Étampes et la Bretagne : le métier de gouverneur de province à la Renaissance (1543-1565) / Etampes and Brittany : the profession of provincial governor in the Renaissance (1543- 1565)

Rivault, Antoine 01 July 2017 (has links)
Pendant plus de vingt ans (1543-1565), Jean de Bretagne, duc d’Étampes est à la tête de la Bretagne en tant que gouverneur de la province. Héritier des comtes de Penthièvre, eux mêmes issus des ducs de Bretagne, il devient un fidèle serviteur des Valois à qui il doit tous ses honneurs. Des sources renouvelées, tant épistolaires qu’administratives, permettent de cerner les contours du métier de gouverneur, dans une province en voie d’intégration au royaume de France, entre le règne de François Ier et les premières guerres de Religion. Si le rôle de défense armée en zone frontalière, est central, il est loin d’être le seul. Au quotidien, le gouverneur de Bretagne est impliqué dans des domaines très variés. Surtout, il est facteur d’union entre la province et le souverain-suzerain. Relais mais aussi intercesseur, le gouverneur est assurément un acteur politique de premier ordre dans une province dont il est le premier gentilhomme. Analyser ses réseaux, cerner son influence, mesurer son pouvoir permet de mieux appréhender le rôle d’un type de serviteur du roi souvent mal compris, voire mal jugé, par l’historiographie. / For more than twenty years (1543-1565), Jean de Bretagne, duke of Étampes, governs Brittany as King’s governor and lieutenant. Heir of the Counts of Penthièvre, he became a faithful servant of the Valois to whom he owed each one of his honors. Some renewed sources, both epistolary and administrative, make it possible to seize the profession ofprovincial governor in the process of integration to the kingdom of France, between the reign of Francis I and the first wars of Religion. If the armed defense role of a reputed border province is central, the governor deals with many other problems on a daily basis. Above all else, he is supposed to be the link between the province and the king. Broker but also intercessor, the governor is undoubtedly a preeminent political actor in the province. First gentleman of the province, all his networks, influences and powers must be analyzed as a whole to better understand the daily life of a type of royal servant often misjudged and misunderstood by historiography.
35

Booze, Boomtowns, and Burning Crosses: The Turbulent Governorship of Pat M. Neff of Texas, 1921-1925

Stanley, Mark 08 1900 (has links)
Pat M. Neff served as governor of Texas from 1921 to 1925, a period marked by political conflict between rural conservatives and urban progressives. Neff, a progressive, found himself in the middle of this conflict. Neff supported prohibition, declared martial law in the oil boomtown of Mexia, and faced the rise of the Ku Klux Klan as a political force in Texas. Though often associated with the Klan, Neff did not approve of the organization and worked against it whenever possible. During the Railroad Shopmen's Strike of 1922, Neff stalled the federal government in its demand he send troops to Denison just long enough to win re-nomination. William Jennings Bryan mentioned Neff as a possible candidate for the presidency in 1924, but he pursued a back-door strategy that alienated his political base among Texas Democrats.
36

Mohammed Ali's Egypt : a case study of peripheral industrialization

Rossi, Edward Allan. January 1978 (has links)
No description available.
37

Aetiology of fatigue during maximal and supramaximal exercise

Ansley, Les 03 1900 (has links)
The aim of this thesis was to investigate the extent of peripheral and central components in the development of fatigue during maximal exercise. Fatigue during maximal and supramaximal exercise has traditionally been modelled from the peripheral context of an inadequate capacity to supply metabolic substrate to the contracting muscles to meet the increased energy demand. However, there are a number of observations that are not compatible with the peripheral fatigue model but which support a reduced central drive during exercise acting to prevent organ failure that might occur should the work be continued at the same intensity. Candidates for the role of “exercise stopper” have been identified as mechanical forces, teleoanticipation, cardiovascular capacity and dyspnoea. We explored these various possibilities in order to determine the most likely cause of exercise cessation during high intensity exercise.The development of a plateau in oxygen consumption during maximal incremental exercise has traditionally been used as evidence that an oxygen deficiency in the exercising muscles causes the termination of exercise. However, the incidence of this “plateau phenomenon” depends largely on mode of exercise, testing protocol and sampling frequency. The aim of this study was to examine whether the development of the “plateau phenomenon” is an artefact of pedalling cadence. In the first study nine healthy individuals performed in random order a maximal incremental ramp test (0.5 W.s-1) on four occasions at a fixed cadence of 60, 80 or 100 rpm and at a self-selected cadence. Oxygen consumption (VO2), CO2 production (VCO2), minute ventilation (VE) and heart rate were measured throughout each trial and averaged over 30 s. Cadence was recorded every second. Neither VO2max nor peak power output were different between trials. Submaximum VO2, VCO2 and VE were not influenced by cadence. A plateau in oxygen consumption was observed in 14% of the trials. Cadence declined significantly towards the end of the self-selected cadence trial (p < 0.05). This ramp protocol produces a low incidence of the “plateau phenomenon” and the measured physiological variables are unaffected by cadence. Furthermore, only one subject displayed this phenomenon on more than one occasion. This confirms that the “plateau phenomenon” is an artefact of the testing protocol. The significant fall in cadence in anticipation of exercise termination during the self-selected cadence trial indicates the presence of a neural regulation, which would lead to a “plateau phenomenon” in those cycle tests in which the work rate is cadence-dependent.The purpose of the second study was to assess whether pacing strategies are adopted during supramaximal exercise bouts lasting longer than 30 s. Eight healthy males performed six Wingate Anaerobic Tests (WAnT). Subjects were informed that they were performing four 30 s WAnT and a 33 s and 36 s WAnT. However, they actually completed two trials of 30, 33 and 36 s each. Temporal feedback in the deception trials was manipulated so that subjects were unaware of the time discrepancy. Power output (PO) was determined from the angular displacement of the flywheel and averaged over 3 s. The peak power (PPI), mean power (MPI) and fatigue (FI) indices were calculated for each trial. Power output was similar for all trials up to 30 s. However, at 36 s the PO was significantly lower in the 36 s deception trial compared to the 36 s informed trial (392 ± 32 W vs 470 ± 88 W) (p < 0.001). The MPI was significantly lower in the 36 s trials (714 ± 76 W and 713 ± 78 W) compared to the 30 s trials (745 ± 65 W and 764 ± 82 W) although they were not different at 30 s (764 ± 83 W and 755 ± 79 W). The significant reduction in FI was greatest in the 36 s deception trial. In conclusion, the significant reduction in PO in the last six seconds of the 36 second deception trial, but not in the 36 second informed trial, indicates the presence of a pre-programmed 30 second “end point” based on the anticipated exercise duration from previous experience. Furthermore the similarity in pacing strategy in all informed trials suggests that the pacing strategy is centrally regulated and is independent of the total work to be performed.Athletes adopt a pacing strategy to delay fatigue and optimise athletic performance. However, many current theories of the regulation of muscle function during exercise do not adequately explain all observed features of such pacing strategies. We studied power output, oxygen consumption and muscle recruitment strategies during successive 4km cycling time trials to determine whether alterations in muscle recruitment by the central nervous system could explain the observed pacing strategies. Seven, highly trained cyclists performed three consecutive 4 km time trial intervals, each separated by 17 minutes. Subjects were instructed to perform each trial in the fastest time possible, but were given no feedback other than distance covered. Integrated electromyographic (iEMG) readings were measured at peak power output and for 90 s before the end of each trial. Subjects reach a VO2max in each interval. Time taken to complete the first and third intervals was similar. Peak power output was highest in the first interval but average power output, oxygen consumption, heart rate and postexercise plasma lactate concentrations were not different between intervals. Power output and iEMG activity rose similarly during the final 60 s in all intervals but were not different between trials. The similar pacing strategies in successive intervals and the parallel increase in iEMG and power output towards the end of each interval suggests that these pacing strategies could not have been controlled by peripheral mechanisms. Rather, these findings are compatible with the action of a centrally regulated that are recruited and de-recruited during exercise. The extent to which peripheral feedback influences recruitment patterns could not be determined from these experiments.The fourth study examined whether the supplementation of inspired air with a hyperoxic mixture results in a dose-dependent increase in peak work rate and maximal oxygen consumption (VO2max) during a ramp test to volitional exhaustion. To avoid the methodological disadvantages associated with breathing the gas mixtures from mixing bags, the trials were performed in a sealed chamber in which the oxygen fraction (FIO2) in the ambient air was altered and subjects were able to inhale directly from the environment. The three oxygen fractions in which the subjects exercised were 21% (room air), 35 or 60%. Arterial blood sampling occurred at rest and every 3 min during the trial. The blood was analysed for the partial pressure of oxygen (pO2), and carbon dioxide (pCO2); pH; oxygen saturation (sO2); haemoglobin saturation (O2Hb); and lactate concentrations. Expired gas and heart rate were measured continuously. Arterial sO2 and O2Hb were elevated in both hyperoxic conditions and did not fall throughout either trial. However in the normoxic trial sO2 and O2Hb declined over the duration of the trial. Lactate concentrations and pH were similar between all trials. VO2max was significantly higher with an FIO2 of 35 and 60% but was not different between hyperoxic conditions. Maximal ventilation (VEmax), carbon dioxide production (VCO2max) and heart rate were similar for all trials. Peak power output was increased in the trained athletes in the 60% FIO2 trial. Since the plateau phenomenon occurred infrequently in all trial (~9%) and the effect of hyperoxia on performance was less than the changes in blood oxygen carrying capacity, we conclude that hyperoxia improved exercise performance not solely by increasing oxygen delivery to the exercising muscles.In order to be able to directly compare the results from studies using different equipment it is important to know the interchangeability of the results from the machines. The fifth study tested the reliability and interchangeability of the two automated metabolic gas analyser systems that would be used in this series of studies at a range of submaximal workloads. Eight highly trained cyclists performed two incremental submaximal cycle ergometer tests. For each session either a Schiller CS-200 or a Vmax Series 229 automated gas analyser was used for expired gas analysis. Data for oxygen consumption (VO2), CO2 production (VCO2), minute ventilation (VE) and respiratory exchange ration (RER) were averaged for each of the five stages (200, 250, 275, 300 and 325 W). The VO2, VE and RER were similar between trials at all workloads. However, VCO2 was significantly lower in the Schiller trial at workloads above 200 W (p < 0.05). Although there was a significant correlation between the two automated systems for the measured parameters (VO2 = 0.78; VCO2 = 0.80; VE = 0.82; RER = 0.72) (p < 0.05), a Bland-Altman plot revealed that the limits of agreement between the two systems were unacceptably large (VO2 = 0.53 to 1.30 L.min-1; VCO2 = 0.55 to 0.64 L.min-1; VE = -22.3 to 30.3 L.min-1; RER = - 0.03 to 0.13). The co-efficient of variation within the analysers was insignificant for both systems. Both the systems provide reliable measures of expired gas parameters. However, care should be taken in directly comparing studies that have used the two different systems due to the poor agreement between the systems.The factors causing the termination of maximal exercise at sea level are unknown. A widely held view is that skeletal muscle anaerobiosis consequent to an inadequate oxygen delivery to the exercising muscles limits exercise. However, there is also evidence that respiratory muscle fatigue at the high ventilatory volumes achieved during maximal exercise delivery and respiratory muscle work on maximal exercise performance, we exercised 8 highly trained cyclists in a pressure-sealed chamber in which O2 concentrations were manipulated and helium (He) was substituted for nitrogen in the ambient air in order to reduce the work of breathing during exercise. This system ensured that external inspiratory and expiratory resistance was minimised and identical in all experimental conditions and approximated conditions present during usual exercise. During trials with O2 enriched ambient air the peak work rate increased (451 ± 58 W vs. 429 ± 59 W). Neither maximum nor submaximal oxygen consumption was altered in FIO2 of 35% (5.0 ± 0.6 l.min-1) compared to 21% (4.9 ± 0.7 l.min- 1). Substituting helium for nitrogen had no additional effect on work (453 ± 56 W) or VO2max (4.9 ± 0.7 l.min-1) beyond those observed for the hyperoxic conditions. Although submaximum VE was reduced with helium, VEmax was unchanged. Since exercise was terminated at the same peak work rate (± 5 W) in the two hyperoxic conditions we postulate that the actual work rate may be the sensed variable that determines maximal exercise performance. The findings from these studies suggest that the maintenance of physiological homeostasis and the avoidance of organ and cellular damage are of fundamental importance during maximal exercise. This is achieved through central regulation of work output based, possibly, on afferent information from the mechanoreceptors in the exercising skeletal muscles or alternatively, the extent of motor unit recruitment during maximal exercise may be hardwired in the central nervous system in a system of feed-forward control.
38

Faculty Senate Minutes February 2, 2015

University of Arizona Faculty Senate 03 March 2015 (has links)
This item contains the agenda, minutes, and attachments for the Faculty Senate meeting on this date. There may be additional materials from the meeting available at the Faculty Center.
39

Low-complexity algorithms for the fast and safe charge of Li-ion batteries

Goldar Davila, Alejandro 24 February 2021 (has links) (PDF)
This thesis proposes, validates, and compares low-complexity algorithms for the fast-and-safe charge and balance of Li-ion batteries both for the single cell case and for the case of a serially-connected string of battery cells. The proposed algorithms are based on a reduced-order electrochemical model (Equivalent Hydraulic Model, EHM), and make use of constrained-control strategies to limit the main electrochemical degradation phenomena that may accelerate aging, namely: Lithium plating in the anode and solvent oxidation inthe cathode. To avoid the computational intensiveness of solving an online optimization as in the Model Predictive Control (MPC) framework, this thesis proposes the use of Reference Governor schemes. Variants of both the Scalar Reference Governors (SRG) and the Explicit Reference Governors (ERG) are developed to deal with the non-convex admissible region for the charge of a battery cell, while keeping a low computational burden. To evaluate the performance of the proposed techniques for the single cell case, they are experimentallyvalidated on commercial Turnigy LCO cells of 160 mAh at four different constant temperatures (10, 20, 30 and 40 °C). In the second part of this thesis, the proposed charging strategies are extended to take into account the balance of a serially-connected string of cells. To equalize possible mismatches, a centralized policy based on a shunting grid (active balance) connects or disconnects the cells during the charge. After a preliminary analysis, a simple mixed-integer algorithm was proposed. Since this method is computationally inefficient due to the high number of scenarios to be evaluated, this thesis proposes a ratio-based algorithm based on a Pulse-Width Modulation (PWM) approach. This approach can be used within both MPC and RG schemes. The numerical validations of the proposed algorithms for the case of a string of four battery cells are carried out using a simulator based on a full-order electrochemical model. Numerical validations show that the PWM-like approach charges in parallel all the cells within the pack, whereas the mixed-integer approach charges the battery cells sequentially from the battery cell with the lowest state of charge to the ones with the highest states of charge. On the basis of the simulations, an algorithm based on a mixed logic that allows to charge in a “sequential parallel” approach is proposed. Some conclusions and future directions of research are proposed at the end of the thesis. / Doctorat en Sciences de l'ingénieur et technologie / info:eu-repo/semantics/nonPublished
40

Ernest F. Hollings and the transformation of South Carolina politics c. 1948-1975

Ballantyne, David Timothy January 2014 (has links)
No description available.

Page generated in 0.0476 seconds