Comparison of the mystery solution methods of Auguste Dupin and Sherlock Holmes

Thesis (Ed.M.)--Boston University, 1936. This item was digitized by the Internet Archive

Circuit breaker simulated operation & behaviour under faulted power system conditions

The rapid increase in electrical demand and supply reliability for both domestic and industrial use throughout the modern world provides a set of unique challenges for supply authorities. It is not only paramount that the ever increasing supply and reliability demands are met but also environmental and cost concerns are addressed. It has been proven that single pole tripping and reclosure schemes implemented on EHV (Extra High Voltage) transmission lines greatly aid in both supply availability and reli- ability. However, it is obvious that such schemes will greatly increase the complexity to both the primary and secondary systems. Subsequently, it is clear that the behaviour of the primary network under single pole operation must be extensively modelled to enable adequate protection and control by secondary protection systems. Throughout the following study a technique for determining the maximum fault duration on a transmission network that incorporates single pole tripping has been developed. Fur- ther to this, investigations into accurate modelling of the physical network particularly pertaining to the fault arc that will be seen inside an EHV circuit breaker when open- ing under faulted network conditions has been undertaken. These techniques have been utilised to produce a specific maximum fault duration of 57ms for an example case study; subsequent circuit breaker failure times were then developed for a number of protection devices

Fecundity of Quail in Spacelab Microgravity

Flight experiments in which fertilized Japanese quail eggs were allowed to develop to various ages in space, and the results of the following laboratory tests are described. Laboratory-based experiments concerned with the embryonic development of Japanese quail in gravity using simulated vibrations and G-force are reported. Effect of turning and ambient temperature at various days of incubation on the development of Japanese quail, and method to feed and water adult and newly hatched Japanese quail in microgravity using a gelatin-based diet as a solid water supply, are also described

Free-jet Altitude Investigation of a 20-inch Ram-jet Combustor with a Rich Inner Zone of Combustion for Improved Low-temperature-ratio Operation

An investigation of the altitude performance of a 20-inch-diameter high-temperature-ratio ram-jet combustor which had been redesigned to provide good combustor efficiency over a wide range of temperature ratios was conducted at zero angle of attack in a free-jet facility at a Mach number of 3.0. Configurations investigated incorporated a cylindrical control sleeve which confined the injected fuel at low over-all fuel-air ratios to about 40 percent of the engine air flow. This provided an optimum fuel-air mixture over a portion of the flame holder when the over-all fuel-air ratio was about 0.02. The configurations with the control sleeve operated with good combustor efficiency at fuel-air ratios as lean as 0.015, whereas the original engine had a lean blow-out limit at a fuel-air ratio of about 0.03. The control sleeve had little effect upon the high-fuel-air-ratio performance of the engine

Altitude Investigation of Can-type Flame Holder in 20-inch-diameter Ram-jet Combustor

Altitude effects on can-type flameholder in ramjet combusto

Helping Children Through Evidence-based Trauma Treatments, Initial Findings from the Massachusetts Child Trauma Project (MCTP)

Background-The Massachusetts Child Trauma Project (MCTP) is a statewide collaboration to implement improvements to the Massachusetts child welfare system in order to increase access to trauma services for children within the system. Purpose-This analysis compares PTSD symptoms and other behavioral and functional impairments at baseline and at 6-month follow-up/discharge among children enrolled in MCTP. Methods-The 166 clinicians trained in MCTP were required to enroll 2-3 children in the care of DCF into the evaluation process. Descriptive statistics were performed on the 300 children enrolled at baseline, as of Fall 2013. Paired t-tests were performed on the 73 children who had follow-up data to assess longitudinal differences in symptoms, behaviors, impairments, and functioning. Results-The baseline results indicate that children enrolled in MCTP present with clinical levels of symptoms of PTSD and behavioral/functional impairment. There were statistically significant decreases in PTSD severity (p=0.005), according to the UCLA PTSD Index Child/Adolescent Version. Additionally, internalizing behaviors, such as anxiety and/or depression, decreased (p=0.05), as assessed by the Child Behavior Checklist. However, the UCLA PTSD Index Parent Version and the externalizing measure of the Child Behavior Checklist showed symptom reduction, but were not statistically significant. Clinician reported progress, ascertained by the Child and Adolescent Needs and Strengths (CANS), showed mixed findings. Conclusion-While there was no comparison group, these results suggest that the trauma treatments provided by MCTP trained mental health providers is reducing symptamotolgy and improving functioning among children in DCF care who experienced trauma. Baseline findings indicate that most children present with symptoms in the clinical range of PTSD and other trauma-related impairments, while longitudinal results show that these children are experiencing symptom reduction, and improved functioning, suggesting that the trainings that MCTP has provided have been effective