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  • 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.
41

Diagnostics and Impulse Performance of Laser-Ablative Propulsion

Sasoh, Akihiro, Mori, Koichi, Anju, Kohei, Suzuki, Koji, Shimono, Masaya, Sawada, Keisuke 28 April 2008 (has links)
No description available.
42

Access to Space without Energy and Propellant on Board

Sasoh, Akihiro, Jeung, In-Seuck, Choi, Jeong-Yeol 04 1900 (has links)
No description available.
43

Overeating and obesity : the role of impulsivity /

Patte, Karen A. January 2006 (has links)
Thesis (M.A.)--York University, 2006. Graduate Programme in Kinesiology and Health Science. / Typescript. Includes bibliographical references (leaves 86-115). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR29602
44

Serotonin and disorders of human disinhibition : alcohol abuse and dependence, aggression and impulsivity

LeMarquand, David Gordon, 1966- January 1997 (has links)
A wealth of data supports the hypothesis that the neurotransmitter serotonin regulates the intake of ethanol, and is involved in the development of alcoholism in humans. Reduced functioning of the serotonergic system hypothetically increases alcohol intake in both animals and humans. In this thesis, it was proposed that the effect of lowered serotonergic function on alcohol intake is mediated by an increase in disinhibition. The hypothesis that lowered serotonin increases disinhibition was tested in separate groups of individuals at high risk for the development of psychopathology: nonalcoholic young men with a strong family history of paternal alcoholism, and adolescent men with previous histories of physically aggressive behavior. Lowered serotonergic synthesis (and thus presumably function) was experimentally induced through a transient dietary reduction in the availability of the amino add precursor of serotonin, tryptophan. Disinhibition was quantified using a go/no-go task previously shown to characterize psychopaths and children with attention deficit hyperactivity disorder as disinhibited. In the first study, acute tryptophan depletion had no effect on aggressive responding on a modified competitive reaction time aggression task, but increased disinhibition in young men at risk for alcoholism. This effect was independent of the tryptophan depletion-induced mood alterations. The effect tryptophan depletion on disinhibition was not replicated in the second study with previously aggressive adolescent men. A number of explanations for this were posited, including the presence of a ceiling effect. An association between disinhibition and executive functioning (cognitive abilities associated with proper functioning of the prefrontal cortex, such as working memory, planning abilities) was demonstrated in the second study. In a third preliminary study, no association between disinhibition on the go/no-go task and allelic polymorphisms of the dopamine D4 receptor
45

A8-3 Model Rocket Impulse Measurement

Haw, Magnus 11 May 2009 (has links)
An experiment was performed to measure the impulse of the A8-3 Estes model rocket engine. The measurements were obtained by mounting an engine vertically onto a frame and measuring the changing weight of the assembly during the firing period for six trials. Thrust was calculated by the difference in measured weight from the rest weight while accounting for the mass loss rate. The impulse of each of the six thrust curves was averaged to find the final impulse measurement: 2.36 (+/-) .16 N-s. Estimates of the average thrust and exhaust velocity were also calculated from the impulse measurement.
46

The ability to generate or inhibit responses after frontal lobectomy /

Miller, Laurie Ann January 1987 (has links)
The ability to generate different responses, and the ability to inhibit inappropriate behaviour, were explored in patients with unilateral cerebral excisions. Site-of-lesion effects were found to interact with the sex of the subject, the time of test-administration, and the nature of the response criteria. In Part I, the Thurstone Word Fluency Test revealed impairments two weeks postoperatively in patients with frontal, temporal, or central-area lesions. In men, removals from the left cerebral hemisphere caused greater deficits than removals from the right, but only left central-area excisions resulted in long-lasting impairments. Patients with left frontal-lobe removals produced few words on a sentence-completion fluency task, but on visual-image fluency, no patient-group was impaired. In Part II, an inability to inhibit impulsive actions on risk-taking tasks was seen after frontal lobectomy, as was a tendency to disregard the instructions on a word-fluency task. These results are consistent with the fact that patients with frontal-lobe lesions described themselves on a behavioural-trait questionnaire as less flexible and more impulsive than did control subjects.
47

On Statistical Arbitrage: Cointegration and Vector Error-Correction in the Energy Sector

Nilsson, Oscar, Latim Okumu, Emmanuel January 2014 (has links)
This paper provides methods to select pairs potentially profitable within the frame of statistical arbitrage. We employ a cointegration approach on pairwise combinations of five large energy companies listed on the New York Stock Exchange for the period 27th September 2012 to 22nd April 2014. We find one cointegrated pair, for which we further investigate both short and long run dynamics. A vector-error correction model is constructed, supporting a long run relationship between the two stocks, which is also supported by the mean-reverting characteristic of a stationary linear combination of the stocks. Impulse response functions and variance decomposition are also studied to further describe the interrelation of the stocks, supporting a unidirectional causality between the stocks.
48

The effects of impulsivity attenuation through training of haptic differentiation and matching strategies on locus of control and risk taking

Ciotti, Joseph Edmond January 1984 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1984. / Bibliography: leaves 138-146. / Microfilm. / xi, 146 leaves, bound ill. 29 cm
49

Assessing the relationship between problematic eating and alcohol use behaviors among national eating disorders screening program participants

Heidelberg, Natalie Faye. January 2007 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2007. / Abstract. Includes bibliographic references (ℓ. 34-39)
50

Pathological Internet use among college students the prevalance of pathological Internet use and its correlates /

DiNicola, Michael D. January 2004 (has links)
Thesis (Ph.D.)--Ohio University, March, 2004. / Title from PDF t.p. Includes bibliographical references (p. 149-156)

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