Transient Research Articles

Mechanism of the transient stimulated Rayleigh scattering in liquids.

Mechanism of the transient stimulated Rayleigh scattering in liquids.

Dynamic simulation of the SLOWPOKE-3 nuclear heating reactor

A 2 MWth nuclear reactor, called SLOWPOKE-3 (Safe LOW- POwer Critical Experiment), is being developed at the Chalk River Nuclear Laboratories (CRNL). This pool-type reactor is cooled by natural circulation and is designed to produce hot water for commercial space heating and perhaps generate some electricity. It is intended for remote locations where the costs of alternative forms of energy are high. A dynamic simulation of this reactor, without closed-loop con trol, was developed and implemented on a hybrid computer, using the basic equations of reactor kinetics and of conserva tion of mass, energy and momentum. The natural circulation of downcomer flow in the pool was simulated using a special filter, capable of modeling various flow conditions. The simula tion was then used to study the intermediate and long-term tran sient response of SLOWPOKE-3 to large disturbances, such as loss of heat sink, loss of regulation, daily load following, and over- cooling of the reactor coolant. Results of the simulation show that the reactor is inherently stable and self-regulating and that none of these disturbances produce hazardous transients.

Plant transient experience base

Plant transient experience base

Transient management: strategies and implementation

Transient management: strategies and implementation

Acquired; Transient Factor X Deficiency in a Patient with Severe Burns

Acquired; Transient Factor X Deficiency in a Patient with Severe Burns

Hormonal autonomy ofArabidopsis thaliana calli

The growth ofArabidopsis thaliana calli on media without growth regulators was studied Calli under study showed autonomy for cytokmms independently whether cultivated on the light or m the dark When cultivated in intense light, they were able to grow, either transiently or permanently, on the medium without any growth regulators In the dark, they were strictly dependent on 2,4 D m the medium Both the intensity of growth and the duration of the transient growth on the medium without growth regulators m the light decreased with the duration of the previous cultivation on the medium with growth regulators The intensity of growth on the medium without grow th regulators was best and the growth was permanent m the callus clone of spontaneous origin which was never treated by growth regulators The degree of chromosomal variability (assessed as the number of chromocentres) m this callus line was lower than that in calli induced on media with growth regulators and then transferred onto medium without growth regulatois.

Preparation of Some Stable and Transient 1,3-Oxazolium-4-olates

Preparation of Some Stable and Transient 1,3-Oxazolium-4-olates

ChemInform Abstract: GENERATION OF ETHYL THIOXOACETATE, A DIENOPHILIC THIOALDEHYDE

AbstractDas aus dem Mercaptan (I) zugängliche Sulfenylchlorid (II) reagiert als Thioaldehydquelle mit Dimethylbutadien (III) zum Cycloaddukt (IV).

Interactive circuit design program in APL

The Interactive Circuit Design Program is a multi-purpose program implemented in APL. It features steady state (DC), frequency (AC), and transient (TR) analysis of linear and nonlinear circuits with arbitrary nonlinearities. Lossless coupled and uncoupled transmission lines in the DC, AC and TR modes can be analyzed in addition to inhomogeneous media in the DC and TR modes. A graphic interface allows users to plot outputs from TR or AC runs on a vector storage tube. The analytic techniques used include a modified nodal method of formulation, an APL-tailored parallel pivoting strategy variable order, variable step implicit integration scheme with an efficient integration strategy.

Generation of ethyl thioxoacetate, a dienophilic thioaldehyde

Ethoxycarbonylmethanesulphenyl chloride reacts with triethylamine to give the transient thioaldehyde, ethyl thioxoacetate, which has been trapped, in situ, by cycloaddition to various conjugated dienes.

Photolytic rearrangement of germanium azides. Evidence for transient germa-imines

Photolysis of germanium azides gives rise to transient germa-imines which have been quantitatively trapped by pinacol. Evidence for the formation of diphenylgermylene in the photolysis of hexaphenylcyclodigermazane is also reported.

Anomalous Transient Current on Plasticized Polyvinylchloride

Anomalous Transient Current on Plasticized Polyvinylchloride

Transient magnetization following photoexcitation

Transient magnetization following photoexcitation

Error of a transient measuring converter

Error of a transient measuring converter

Acute Effects of Alcohol on Measures of Walking Performance

An on-line system for continuously monitoring 10 different quantitative measures of walking move ments to a high fidelity was employed in a study comparing the effects of tolerance for alcohol and dosage level in mg/kg body weight over an 80 min ute period following drinking. The data were sub jected to multivariate analyses of covariance. Com plex changes in walking were detected—some tran sient—during the period of observation. Different measures were optimally sensitive in monitoring a straight walking task and a blindfolded complex walk. The consequent problems of validation and generalization are noted.

Well-testing in travale-radicondoli field. Part V. Concluding statement on pressure transient studies made from well tests in the Travele-Radicondoli reservoir

Well-testing in travale-radicondoli field. Part V. Concluding statement on pressure transient studies made from well tests in the Travele-Radicondoli reservoir

Numerical Methods in Water-Wave Diffraction and Radiation

The subject of diffraction and radiation of water wave s by natural boundarie s or man-made structure s i s of con siderable im portance in ocean engineering. A s a re sult of the ra pid growth of ocean e xploration and tran sportation, detailed knowledge of wave effect s i s now a virtual nece ssity for the safe de sign of co stly pro ject s such a s tanker s and their mooring s, off shore terminal s and drilling rig s, etc. Predicting the re spon se s to po ssible incident waves i s essential for the safe and economical o peration of exi sting and new harbor s. Effect s of t sunami s along a coa st line mu st be under stood in order to devi se mea sure s for protecting live s and pro pertie s. In di scu ssing wave effect s it i s im portant to di stingui sh between small and large bodie s (of ty pical dimen sion a) in com pari son with the characteri stic wave­ length (2n/k) and the wave am plitude (A). For small ka and large A/a [�0( 1)], vortex shedding and flow se paration are dominant, but diffraction i s in significant, i.e. while the body i s affected by the wave field near by, it doe s not materially alter the wave field at large. For small A/a and ka � 0(1 ), se paration become s in signi ficant while diffraction become s crucial. It i s to the latter category that thi s review i s addre ssed. In the conte xt of linearized theory, some analytical solution s are available for sim ple geometrie s by em ploying either re sult s that are known in cla ssical phy sic s (a circular vertical cylinder, a semi-in finite long breakwater, etc) or other exact technique s ( e.g., Dean 1945, Ur sell 1947, 1948, John 1948, Hein s 1948, Lewin 196 3, Mei 1966). A sym ptot ic theorie s for short or long wave s have al so been deve lo ped. Thi s review cover s numerical methods f or arbitrary geometrie s and frequencie s for which exten sive u se of the com puter i s nece ssary. It i s further re stricted to sim ple harmonic wave s. The more general ca se s of tran sient or random wave s can in princi ple be obtained by Fou rier integral s from the single-frequency re spon se calculated for all frequencie s (0 < W < CfJ). Direct calculation of tran sient problem s u sing tran sient Green function s ha s ju st begun ( see Shaw 197 5, Harten 197 5).

Lithogenic Bile after Conjugated Estrogen

Reference is made to a previous paper by Bennion et al. describing t he effects of contraceptive steroids on the lipid composition of gall bladder bile. A similar rise in cholesterol saturation of hepatic bile was observed after giving conjugated equine estrogens (.5 mg/kg) to 7 fa sting patients with indwelling T-tubes. Liver function tests were norma l and bile culture was negative. 1 ml of hepatic bile was collected aft er 6, 12, and 24 hours for lipid determinations. The administration of estrogens promptly produced lithogenic hepatic bile. The effect was tra nsient with the lithogenic index returning to normal at 24 hours. 3 day s previous to this investigation hepatic bile had been normal. In a pre vious study a reduced biliary concentration of bile acids had been found in rats exposed to estradiol.

Transient Hyperalaninemia and Hyperpyruvic Acidemia

Transient Hyperalaninemia and Hyperpyruvic Acidemia

Transient coherent emission from a dressed molecule

(1973). Transient coherent emission from a dressed molecule. Molecular Physics: Vol. 25, No. 3, pp. 739-743.