The kinetothermal analysis and synthesis of cam systemsDie warmekinetische analyse und synthese von kurvengetrieben

The meaning of kinetothermal analysis and synthesis of mechanisms is defined. Using kinetothermal analysis and synthesis, an analytical technique is developed to describe and compensate for the kinetothermal errors in displacement, velocity and acceleration in cam-follower systems. The class of problems considered includes the case where either a cam, follower or framework is subjected to a different uniform temperature than the other two and the case where a cam, follower or frame expand differently in a uniform temperature change due to unequal coefficients of thermal expansion. An example application is presented.     

Psychosocial factors as mediators of acupuncture therapy.

Investigated a number a psychosocial variables that have been suggested as possible mediating factors in acupuncture therapy. 42 patients (mean age 46.7 yrs) with bursitis and/or tendonitis of the shoulder served as Ss. All were randomly assigned to 1 of 4 treatment groups: acupuncture-positive milieu, acupuncture-negative milieu, placebo acupuncture-positive milieu, and placebo acupuncture-negative milieu. Pretreatment and posttreatment subjective pain reports and shoulder motion studies, as well as pretreatment assessments of hypnotic susceptibility and suggestibility, were determined for each S. Results indicate that (a) acupuncture and placebo acupuncture were equally effective in producing highly significant reductions in subjective pain reports; (c) Ss treated in the positive milieu reported more improvement than those in the negative milieu; and (d) hypnotic susceptibility, suggestibility, belief in the treatment, and the satisfaction of expectations showed no relationship to treatment outcome. It is concluded that acupuncture therapy provides a powerful placebo. Treatment milieu variables warrant future study in the attempt to understand the acupuncture phenomena. (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Current perspective on fast reactor containment

The concept of “containment” is to provide a series of physical barriers between the radioactive products of the fission process and the public. All nuclear reactors have several such barriers and LMFBRs have more than most. These barriers are, successively:

1. fuel, which retains fission products;

2. fuel cladding, which encloses the fuel;

3. sodium coolant, which absorbs fission products released through fuel caldding;

4. primary coolant boundary, which has energy absorption and leakage control capabilities;

5. containment building, hereafter referred to as containment, which provides the final engineered barrier for control of radioactive releases;

6. exclusion distance, which provides space for natural attenuation of radioactive releases before reaching the public.

These barriers, along with the design approaches and features which protect their integrity under normal and accident conditions, assure that the public is adequately protected from the potential hazards of radioactivity residing in the core. It is only in the case of hypothesized core disruptive accidents (HCDAs) that these successive barriers can be sufficiently threatened as to pose a significant threat to the public. These HCDAs involve an extremely low probability sequence of successive failures resulting in core cooling imbalances which lead to fuel overheating. Under such conditions, the fuel and cladding barriers can be lost and energy sources can be generated which threaten the primary coolant boundary and containment. This paper addresses current perspectives on containment of HCDAs with emphasis on the approach and programs in the US.     

Reversal of innate aversions: Attempts to induce a preference for chili peppers in rats.

Although humans frequently develop preferences for innately unpalatable bitter or irritant substances, such preferences are extremely rare in animals. An attempt was made to understand the nature of this difference by 5 experiments with Charles River albino rats, using chili pepper as the unpalatable substance. In parallel with major aspects of the human experience with chili pepper, Ss were exposed to it as a flavoring in all their food for periods up to 11 mo from birth without significant preference enhancement. Gradual introduction of chili into the diet also had no effect, nor did poisoning and safety experiences designed to teach Ss that only chili-flavored foods were safe to eat. Seven pairings of chili-flavored diet with prompt recovery from thiamine deficiency did significantly attenuate the innate aversion and may have induced a chili preference in at least 1 case. Extensive experience with chili did not reliably make Ss much less sensitive to its oral effects. The only reliable way to eliminate chili aversion in rats is to destroy their chemical irritant sense, which was accomplished in 1 group. (29 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Nonocclusive mesenteric vascular insufficiency

A 74-year-old man had probable nonocclusive intestinal ischemia after myocardial infarction. Angiography and careful monitoring of the patient's hemodynamic status allowed diagnosis and appropriate supportive treatment leading to recovery.     

Photo-removal of sulfamethoxazole (SMX) by photolytic and photocatalytic processes in a batch reactor under UV-C radiation (λmax=254 nm)

In this study, photolytic and photocatalytic removal of the antibiotic sulfamethoxazole (SMX) under UVC radiation (λ=254 nm) was investigated. The light intensity distribution inside the batch photoreactor was characterized by azoxybenzene actinometry. The intensity of incident radiation was found to be a strong function of position inside the reactor. 12 mg L(-1) of SMX was completely removed within 10 min of irradiation under UVC photolysis, compared to 30 min under TiO(2) photocatalysis. COD measurement was used as an indication of the mineralization efficiency of both processes and higher COD removal with photocatalysis was shown. After 6h of reaction with photolysis and photocatalysis, 24% and 87% removal of COD was observed, respectively. Two of the intermediate photo-products were identified as sulfanilic acid and 3-amino-5-methylisoxazole by direct comparison of the HPLC chromatograms of standards to those of treated solutions. Ecotoxicity of treated and untreated solutions of SMX towards Daphnia magna was also investigated. It was found that a 3:1 ratio of sample to standard freshwater and a high initial concentration of 60 mg L(-1) of SMX were used to obtain reliable and reproducible results. The photo-products formed during photocatalytic and photolytic processes were shown to be generally more toxic than the parent compound.     

A colorimetric study of oenin copigmented by procyanidins

A colorimetric method was used to analyse the influence of procyanidin structure on colour changes of malvidin 3‐O‐glucoside (oenin) solution resulting from copigmentation. The study was performed in hydroalcoholic citrate/phosphate buffer solution (120 g L^?1) at pH 3.6 and ionic strength 0.2 mol L^?1. Chromatic L*, a* and b* coordinates (CIELAB, D65/10° illuminant/observer condition) obtained from spectral curves recorded between 360 and 830 nm allowed the calculation of lightness L*, chroma C* and hue angle h_ab. In general, addition of copigment induced colour enhancement (loss of lightness and increased chroma). The prevailing parameters affecting colour changes were lightness and chroma for monomers and lightness and hue for procyanidins B5 and B8 (C4–C6 dimers). A small blueing effect was observed only for catechin monomer‐copigmented solutions. For procyanidin copigments, as the structural complexity of the copigment increased, the hue angle moved to yellower values. The ester gallate of dimer B2 produced the strongest modification of colour attributes of oenin solution. Copyright © 2006 Society of Chemical Industry     

Report of the U.S. Department of Energy Fusion Energy Sciences Advisory Committee Panel on Burning Plasma Physics

This is the report of a panel set up by the U.S. Department of Energy Fusion Energy Sciences Advisory Committee (FESAC) in response to a charge letter on October 5, 2000, from Dr. Mildred Dresselhaus, then Director of the DOE's Office of Science. In that letter, Dr. Dresselhaus asked the FESAC to investigate the subject of burning plasma science. The report addresses several topics, including the scientific issues to be addressed by a burning plasma experiment and its major supporting elements, identification of issues that are generic to toroidal confinement, and the role of the Next-Step Options (NSO) Program.     

The electrical characteristics of metal–semiconductor hetero-structures with graphene oxide and perylenetetracarboxylic dianhydride interface

Journal of Materials Science: Materials in Electronics - In this study, we investigated the electrical properties of Al/p-Si, Al/GO/p-Si, Al/PTCDA/p-Si and Al/GO-PTCDA/p-Si structures were examined...