Search Results - (Author, Cooperation:H. W. Wu)

2018-08-03

Institute of Physics (IOP)

1757-8981

1757-899X

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

2014-05-24

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Adolescent ; Adult ; Animals ; Antibodies, Protozoan/blood/*immunology ; Antigens, Protozoan/*immunology ; Child ; Erythrocytes/*parasitology ; Hepatocytes/immunology/parasitology ; Humans ; Immunoglobulin G/blood/immunology ; Kenya ; Malaria/prevention & control ; Malaria Vaccines/*immunology ; Malaria, Falciparum/*prevention & control ; Mice ; Plasmodium berghei/immunology ; Plasmodium falciparum/*growth & development/immunology ; Protozoan Proteins/*immunology ; Recombinant Proteins/immunology ; Schizonts/*growth & development ; Young Adult

2018-02-16

The American Association for Cancer Research (AACR)

1078-0432

1557-3265

Medicine

2018-11-08

Institute of Physics (IOP)

1757-8981

1757-899X

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

2018-01-03

Institute of Physics (IOP)

1757-8981

1757-899X

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

1089-7550

AIP Digital Archive

Physics

Two different lasers were used to etch patterns on Si surfaces employing a thin film cell configuration. A strong, pulsed, 20 W KrF excimer laser was used for etching. A weak, cw, 5 mW HeNe laser provided background light. This laser, by itself, was incapable of etching the Si surface. A substantial enhancement of the laser etching process with background light was observed either when using many pulses or only one UV laser pulse. An even bigger change was observed as a function of the etchant concentration. © 1996 American Institute of Physics.

Electronic Resource

1365-2036

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

The expense of the 13C-urea breath test (UBT) to detect Helicobacter pylori infection is mainly due to the cost of 13C-urea and the analysis using isotope ratio mass spectrometry (IRMS).〈section xml:id="abs1-2"〉〈title type="main"〉Aim:To test whether a UBT, using a lower dose of urea and lower-priced isotope-selective nondispersive infrared spectrometry (INIS), can preserve diagnostic efficacy in clinical practice.〈section xml:id="abs1-3"〉〈title type="main"〉Methods:A total of 177 dyspeptic patients received endoscopy for H. pylori culture and histology. All of them received a UBT in which the duplicate baseline, 10 min, and 15 min breath samples after ingestion of 50 mg 13C-urea were collected to analyse the excess 13CO2/12CO2 ratio (ECR) by IRMS (ABCA, Europa Scientific, UK) and INIS (UBiT-IR200, Photal Otsuka Electronics, Japan), respectively.〈section xml:id="abs1-4"〉〈title type="main"〉Results:Of the 177 patients, 84 were infected and 93 were uninfected with H. pylori. A close correlation of ECR was found between IRMS and INIS (r=0.9829 at 10 min; r=0.9918 at 15 min, P 〈 0.0001). Analysing the 15-min samples, UBT by both IRMS and INIS achieved the same sensitivity (96.4%) and specificity (98.9%).〈section xml:id="abs1-5"〉〈title type="main"〉Conclusions:INIS is as effective as IRMS for UBT, and can use a lower dose of 13C-urea. This can provide an economic UBT, using the lower-priced INIS and a low dose of 13C-urea.

Electronic Resource

1365-2036

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Aim : To test whether supplements of Lactobacillus- and Bifidobacterium-containing yogurt (AB-Yogurt) affect the success of Helicobacter pylori eradication.Methods : One hundred and sixty H. pylori-infected patients were randomized into a triple-plus-yogurt group or a triple-only group, receiving 1 week of triple therapy with and without supplements of AB-Yogurt, respectively. In the triple-plus-yogurt group, AB-Yogurt was continued for 4 weeks after triple therapy. Eight weeks later, patients were assessed for the success of H. pylori eradication. The stool samples of 22 randomly selected patients, 11 from each group, were provided on enrolment, at the first week and at the fifth week for evaluation of the percentage of Bifidobacterium in anaerobes.Results : By intention-to-treat analysis, the triple-plus-yogurt group had a higher H. pylori eradication rate than the triple-only group (91% vs. 78%, P 〈 0.05). The per protocol H. pylori eradication rates were similar for both groups (93.5% vs. 89%, P = N.S.). Only patients supplemented with AB-Yogurt showed restoration of the percentage of Bifidobacterium in the anaerobes of stools at the fifth week to the level in the stools on enrolment.Conclusions : Supplement with AB-Yogurt can improve the intention-to-treat eradication rates of H. pylori, and can restore the depletion of Bifidobacterium in stools after triple therapy.

Electronic Resource

1432-1181

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Abstract A useful method, involving the combined use of the analysis and the finite-element methods, has been successfully applied to study temperature distributions on a finite domain with source arrays, when a moist-air mixture flows over the domain. Previously reported analysis/finite element combined methodology has been confined to the slow convergence in series solution of the analytical method. The restriction can be removed by using Aitken's delta-squared process for accelerating in this paper. The results obtained have been compared with author's previous experimental data, and found to be agreeable.

Electronic Resource

1432-1114

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Abstract  A prolate spheroid submerged in water can be heated for decreasing the viscous drag because of a decrease in viscosity with increasing temperature. The heated boundary layer experiment, based on this principle, was carried out in a circulating water channel of NCKU, and the viscous drag of a spheroid, with a five-to-one ratio of length to mid-diameter, was also measured by means of wake surveys. The difference of total-head between wake and undisturbed region was measured by two total-head tubes, and the water speed in the wake area was measured by an electromagnetic flowmeter. The results indicate that the viscous drag of the model decreases with surface heating, and the decrease in viscous drag of the model is 13% when the surface temperature is 17 °C above the ambient water temperature. The velocity gradient in the wake region and the total-heating differential readings between undisturbed and wake region also decrease with surface heating due to the delayed laminar-turbulent transition in the boundary layer. The values of the coefficient of viscous drag obtained without surface overheating are found to be in agreement, for the range of Froude numbers investigated, with the results obtained from previous experiments.

Electronic Resource

1432-1181

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Abstract This paper investigates the unsteady flow and heat transfer characteristics of rectangular sources with and without an inclined plate in a channel. The results show that the installation of an inclined plate above an upstream source results in a periodically unsteady flow and it can effectively enhance the heat transfer performance. Moreover, the inclined angle of the plate is changed under different Reynolds numbers to study the heat transfer performance in the channel.

Electronic Resource

1432-1181

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Zusammenfassung Diese Untersuchung stellt ein Finite-Elemente-Wärmeübertragungsmodell für die Berechnung der Temperaturverteilung eines Kolbens in einem Verbrennungsmotor vor. Die thermischen Randbedingungen wurden in diesem Model für verschiedene Arbeitsbedingungen aufgestellt. Die mittlere Gastemperatur und der Wärmeübergangskoeffizient wurden durch eine Simulation des Motors erhalten. Die Temperaturen entlang des Kolbenringes und des Kolbenrandes wurden mit einer Formel berechnet. Die entsprechenden Wärmeübergangskoeffzienten wurden durch eine äquivalente thermische Kreislaufanalyse erhalten. Das Modell wurde kalibriert und die berechneten Temperaturen des Verbrennungsmotors mit den gemessenen verglichen. Es wurde festgestellt, daß die Berechnungen vernünftig waren und somit das Simulationsmodell gut geeignet ist.

Abstract This study presents a finite element heat-transfer model for the prediction of piston temperature distributions in a real time operation engine. The thermal boundary conditions are specified adequately in the model for various operations. The time-mean, area-averaged gas temperature and heat transfer coefficient could be obtained from the engine simulation. The ambient tremperatures along piston ring belt and skirt were estimated with a formula and the corresponding heat transfer coefficients were evaluated through equivalent thermal circuit analysis. The model is also calibrated and the predicted and measured temperatures compared for the operating engine. The predictions are reasonable, providing confidence in the use of the simulation model.

Electronic Resource

1432-1181

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Zusammenfassung Es werden die thermischen Eigenschaften des gerippten Zylinders eines Zweitaktmotors untersucht. Die Berechnung wurde mittels eines Finite-Elemente-Modells, gekoppelt mit einer Simulation des Motors durchgeführt. Insbesondere wird der Effekt der Quetschströmung auf die thermischen Eigenschaften in dem gerippten Zylinder dargestellt. Das Modell wurde mittels der experimentellen Daten kalibriert. Die Ergebnisse zeigen, daß die Rippentemperatur mit steigendem Quetschverhältnis in Folge von größeren Wärmeverlusten und ebenso mit ansteigender Motordrehzahl, steigt. Die Ergebnisse sind vernünftig und zeigen somit, daß das Modell brauchbar ist.

Abstract Thermal characteristics in the finned-wall cylinder have been studied under a two cycle engine operation. The analysis is developed by a finite element conduction model together with phenomenological simulation of the engine. Particularly, the effect of squish motion in chamber on the thermal characteristics in the finned-wall cylinder is presented. The model is also calibration with experimental data. The results showed that the fin temperatures increased with increasing squish ratio due to much more heat loss, and also with increasing engine speed. The predictions are reasonable, providing confidence in the use of the model.

Electronic Resource

1619-6937

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Summary The problem of heat transfer enhancement of mixed convective flow past heated blocks in a horizontal channel is investigated. The heat transfer enhancement in this paper has been accomplished by the installation of an oblique plate to generate vortex shedding, which is used in flow modulation. Results for the details of the streamlines in the channel and the Nusselt number along the blocks with and without an oblique plate have been presented.

Electronic Resource

1619-6937

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Physics

Summary The inplane problem of dissimilar isotropic wedges of arbitrary angles that are bonded together along a common edge is considered. The surfaces of the wedges are subjected to traction-displacement or displacement-displacement boundary conditions. The characteristic equation is derived to determine the dependence of the order of the stress singularity on the wedge angles and material constants for plane strain and plane stress problems. Numerical results for several special wedge geometries are presented for different material combinations. The asymptotic behavior of the stresses in the vicinity of the apex is also investigated. Explicit solutions for the order of stress singularity are presented for some special cases.

Electronic Resource