Zugl.: Hamburg, Helmut-Schmidt-Universiẗat, Diss., 2009.

Thesis (M.D.)--University of Pennsylvania, 1802. / Microform version available in the Readex Early American Imprints series.

Univerzita Karlova, Fakulta sociálních věd / Smetanovo nábřeží 6, 110 01 Praha 1 info@fsv.cuni.cz, tel: 222 112 111 www.fsv.cuni.cz V Praze dne 09.06.2021 Jméno a příjmení studenta: Stefanie Schmidt Identifikační číslo studenta: 80760757 Identifikační číslo studia: 486229 Jazyk práce: angličtina Název práce v jazyce práce: Terrorist Attacks as "Policy Windows": A Discourse Network Analysis of German Parliamentary Debates Název práce v českém jazyce: Teroristické útoky jako politické příležitosti: Diskurzivní analýza německých parlamentních debat Vedoucí práce: PhDr. Vít Střítecký, M.Phil., Ph.D. Oponent práce: prof. Volker Schneider, Dr. Abstract in English is not available.

Load testing remains the most integral part of testing and measuring the performance of Large Scale Software Systems (LSS). During the course of a load test, a system under test is closely monitored, resulting in an extremely large amount of logging data, e.g., Performance counters logs. The performance counter log captures run-time system properties such as CPU utilization, disk I/O, queues, and network traffic. Such information is of vital interest to performance analysts. The information helps them to observe the system’s behavior under load by comparing it against the documented behavior of a system or with expected behavior. In practice, for LSS, it is impossible for an analyst to skim through the large amount of performance counters to find the required information. Instead, analysts often use ‘rules of thumb’. In a LSS, there is no single person with complete system knowledge. In this thesis, we present methodologies to help performance analysts to 1) more effectively compare load tests to detect performance deviations, which may, lead to Service Level Agreement (SLA) violations and 2) provide them with a smaller and manageable set of important performance counters to assist in the root cause analysis of the detected deviations. We demonstrate our methodologies through case studies based on load test data obtained from both a large scale industrial system and an open source benchmark system. Our proposed methodologies can provide up to 89% reduction in the set of performance counters while detecting performance deviations with few false positives (i.e., 95% average precision). / Thesis (Ph.D, Computing) -- Queen's University, 2013-08-28 23:04:58.774

Class of 2009 Abstract / OBJECTIVES: To explore the viewpoints of physicians, pharmacists, and other healthcare professionals on the creation of a behind- the-counter class of drugs. METHODS: This was a descriptive study of testimony contained in public hearings that were held by the FDA regarding behind-the- counter availability of certain medications. A data collection form was created to classify the testimony into categories according to the list comprised of 14 general issues, 11 logistical issues, and 11 miscellaneous issues. Testifiers were divided into three groups: medical, pharmacy, and health care related. Testimonies were analyzed for issues addressed by each speaker and marked pro, con, or neutral next to the corresponding issue. Frequencies and percentages were derived from the count data and groups were compared using a Yate’s Chi-square test. RESULTS: The medical, pharmacy, and health care related groups had a significantly different number of responses (p<0.001). The responses of the medical testifiers were significantly more opposed to a BTC class than the pharmacy testifiers (p<0.001). The pharmacy testimony was also significantly more in favor of a BTC class compared to the health care related groups testimony (p=0.014). The medical testimony was not significantly different from the health care related testimony (p=0.064). CONCLUSIONS: Pharmacists supported and physicians opposed the creation of a BTC class of drugs. Other healthcare related professionals had mixed opinions as a group.

Escape maintained behavior in dogs is generally displayed by one of two behaviors-fleeing or aggression. Once aggression is negatively reinforced by the removal of the aversive stimulus, it is very difficult to eliminate from the organism's repertoire. Counterconditioning is the process of pairing a positive reinforcer with an aversive stimulus in the attempts that an organism will no longer exhibit fear responses in its presence. This process must be done gradually with small approximations. Many organisms have been trained to tolerate the presence of aversive stimuli via counterconditioning. However, this process can be time consuming and has inconsistent results. The purpose of this experiment was to monitor the effects of counter conditioning around an aversive stimulus while simultaneously training an identical behavior in the presence of a neutral stimulus. The results demonstrated that even though counterconditioning produced approach to the aversive stimulus the subject still exhibited numerous fear responses when results were compared to the control condition.

Tissue equivalent proportional counters (TEPCs) are commonly used for radiation monitoring in areas where a mixture of neutron and photon radiations may be present, such as those commonly encountered in nuclear power plants. In such radiation fields, the dose rate of each component can vary drastically from extremely low to very high. Among these possible combinations of radiation fields with very different dose rates, a mixed field of an intense photon and a weak neutron dose component is the more commonly encountered. This study describes the measurement of lineal energy spectra carried out with a 5.1 cm (2 inch) diameter spherical TEPC simulating a 2 μm diameter tissue site in low energy (33 – 330 keV neutrons) mixed photon-neutron fields with varying dose rates generated by the McMaster University 1.25 MV double stage Tandetron accelerator. The Tandetron accelerator facility was employed to produce neutrons using thick 7Li targets via the 7Li(p, n)7Be reaction. A continuous spectrum of neutrons is generated at any selected proton beam energy which is very narrow at beam energies very close to the threshold of the reaction 1.88 MeV and becomes wider as the proton beam energy moves further away from the threshold energy of the reaction. Dose rates which resulted in dead times as high as 75% for the data acquisition system were employed to study the effect of dose rate on the measured quality factors, microdosimetric averages (y ̅_f and y ̅_D)absorbed dose and dose equivalent. The dose rate at a given beam energy was varied by changing the accelerator beam current. A variety of mixed neutron gamma fields was generated using neutron beams with mean energies extending approximately from 33 keV to 330 keV with the 7Li target using proton beam energies ranging from 1.89 to 2.5 MeV. In direct beams, 478 keV photons which are produced in the 7Li target via inelastic scattering interaction 7Li(p, p'γ)7Li dominate the low LET component of the mixed field of radiation. When a 2 cm thick polyethylene moderator was inserted between the neutron producing target and the counter, the low LET component of the mixed radiation field also contained 2.20 MeV gamma rays originating from 1H(n, γ)2H capture interactions in the moderator. We have observed that high dose rates due to both photons and neutrons in a mixed field of radiation result in pile up of pulses and distort the lineal energy spectrum measured under these conditions. The pile up effect and hence the distortion in the lineal energy spectrum becomes prominent with dose rates which result in dead times larger than 25% for the high LET radiation component. In intense neutron fields, which may amount to 75% dead time, a 50% or even larger increase in values for the measured microsdosimetric averages and the neutron quality factor was observed. This study demonstrates that moderate dose rates which do not result in dead times of more than 20-25% due to either of the component radiations or due to both components of mixed field radiation generate results which are acceptable for operational health physics mixed neutron-gamma radiation monitoring using tissue equivalent proportional counters. / UOIT

This thesis examines the topic of memory in Guatemala in reference to the two Reports published in an effort to make the truth about the nation's decades-long war known.

This thesis examines the topic of memory in Guatemala in reference to the two Reports published in an effort to make the truth about the nation's decades-long war known.

This project was designed to determine the feasibility of constructing a multichamber proportional counter. A multi-chamber detector is designed to increase the total surface area which will increase the number of radiation interactions that occur per unit dose. Surface area can be changed without changing the detector volume by subdividing the active volume into several smaller volumes that can then be used as mini detectors whose data can be summed and used to determine the absorbed dose. This will allow the total surface area to remain the same as that of the more common 12.5 cm (5 in.) spherical detector and a decreased total volume resulting in a more compact detector design. However, subdividing those volumes causes problems with electric field fringing at the ends of the mini detectors. In order to correct this, guard ring and field tube designs which operate at a lower voltage than the detector cathode were tested. Results from this study showed that the field tube design provided the best overall resolution but it only outperformed the other designs by a maximum of 5%. However the field tube design doubles the length of the detector which would result in a larger overall detector package. The performance of the single and double ring configurations was suitable for radiation monitoring applications. These findings show that it is feasible to use an array of subdivided detector volumes instead of a spherical detector.