The Experts below are selected from a list of 10464 Experts worldwide ranked by ideXlab platform
Hongsheng Wang - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic analysis on mid low temperature solar methane steam reforming with hydrogen permeation membrane reactors
Applied Thermal Engineering, 2019Co-Authors: Hongsheng Wang, Hui KongAbstract:Abstract Hydrogen production by methane reforming reaction in membrane reactors is a promising means of solar energy harvesting and storage. The integration of endothermic methane reforming with selective removal of H2 through hydrogen permeation membrane theoretically enables a near-complete conversion of methane at the temperature of 400 °C or above (normally 800–900 °C) by shifting the equilibrium of reforming reaction. Operation of methane membrane reforming reactors at lower temperatures offers a special advantage of possible combination with solar trough collector on a large scale. However, such advantages are not immediately apparent due to special characteristics of solar thermal technologies and lower conversion rates of methane, which needs further clarification from a thermodynamic perspective. In this work, a numerical model of solar-driven methane reforming reaction in a palladium (Pd) membrane reactor with Vacuum Pump and compressor is established. Methane reforming and H2 permeation processes are theoretically investigated in a temperature range of 300 °C to 700 °C. An optimal conversion rate range of methane for efficient solar methane membrane reforming is calculated, and the net solar-to-fuel efficiency can reach as high as 38.25% at 400 °C after taking real Vacuum Pump and compressor efficiencies into account. The findings of this work show feasibility of integrating methane reforming with mid- or low-temperature solar thermal technologies.
Genzhou Liu - One of the best experts on this subject based on the ideXlab platform.
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treatment of peyronie s disease with collagenase clostridium histolyticum and Vacuum therapy a randomized open label pilot study
The Journal of Sexual Medicine, 2017Co-Authors: David J. Ralph, Amr Abdel Raheem, Genzhou LiuAbstract:Abstract Background Collagenase Clostridium histolyticum (CCH) is indicated for the treatment of penile curvature in adult men with Peyronie's disease (PD) with palpable plaque and curvature deformity of at least 30° at the start of therapy. Aim To evaluate the efficacy and safety of CCH plus Vacuum-Pump therapy with and without penile modeling for the management of PD. Methods Adult men with PD and penile curvature of at least 30° were randomly assigned to receive CCH 0.58 mg plus Vacuum therapy alone (n = 15) or with penile plaque modeling (n = 15). Patients received no more than four treatment cycles (cycle = ∼6-week duration), each consisting of two intralesional injections of CCH administered 24 to 72 hours apart. Vacuum therapy was applied twice daily from 14 days after the second injection of each cycle until the following cycle. Modeling was performed 24 to 72 hours after the second injection of each cycle. Outcomes The primary end point was change in penile curvature from baseline to week 36; additional end points included changes in Peyronie's Disease Questionnaire (PDQ) domain scores, composite response (≥20% decrease in penile curvature and decrease in PDQ bother score ≥ 1 point), and global response (small but important, moderate, or much improvement in the Global Assessment of PD). Results At week 36, improvement in penile curvature from baseline was similar in the two groups (mean change from baseline = −23.7° [SD = 10.9] for CCH + Vacuum + modeling and −23.3° [SD = 7.2] for CCH + Vacuum; between-group difference = −0.3°, 95% CI = −7.3 to 6.6). Improvements in most PDQ domains, including bother, were observed from baseline to week 36 in the two groups. Most patients were composite (66.7% and 84.6% with CCH + Vacuum + modeling and CCH + Vacuum, respectively) and global (86.7% and 92.3%, respectively) responders. The most common adverse events were penile contusion, penile swelling, and penile pain. Clinical Implications Vacuum-Pump therapy administered alone or in combination with modeling after CCH treatment could improve PD symptoms. Strengths and Limitations This was a pilot study with a small sample and limited follow-up duration. Conclusion CCH and Vacuum-Pump therapy (alone or combined with modeling) could be an appropriate consideration for men with PD and warrants further investigation. Ralph DJ, Abdel Raheem A, Liu G. Treatment of Peyronie's Disease With Collagenase Clostridium histolyticum and Vacuum Therapy: A Randomized, Open-Label Pilot Study. J Sex Med 2017;14:1430–1437.
Hui Kong - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic analysis on mid low temperature solar methane steam reforming with hydrogen permeation membrane reactors
Applied Thermal Engineering, 2019Co-Authors: Hongsheng Wang, Hui KongAbstract:Abstract Hydrogen production by methane reforming reaction in membrane reactors is a promising means of solar energy harvesting and storage. The integration of endothermic methane reforming with selective removal of H2 through hydrogen permeation membrane theoretically enables a near-complete conversion of methane at the temperature of 400 °C or above (normally 800–900 °C) by shifting the equilibrium of reforming reaction. Operation of methane membrane reforming reactors at lower temperatures offers a special advantage of possible combination with solar trough collector on a large scale. However, such advantages are not immediately apparent due to special characteristics of solar thermal technologies and lower conversion rates of methane, which needs further clarification from a thermodynamic perspective. In this work, a numerical model of solar-driven methane reforming reaction in a palladium (Pd) membrane reactor with Vacuum Pump and compressor is established. Methane reforming and H2 permeation processes are theoretically investigated in a temperature range of 300 °C to 700 °C. An optimal conversion rate range of methane for efficient solar methane membrane reforming is calculated, and the net solar-to-fuel efficiency can reach as high as 38.25% at 400 °C after taking real Vacuum Pump and compressor efficiencies into account. The findings of this work show feasibility of integrating methane reforming with mid- or low-temperature solar thermal technologies.
Sung Oh Cho - One of the best experts on this subject based on the ideXlab platform.
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a Vacuum sealed miniature x ray tube based on carbon nanotube field emitters
Nanoscale Research Letters, 2012Co-Authors: Sung Hwan Heo, Hyun Jin Kim, Jun Mok Ha, Sung Oh ChoAbstract:A Vacuum-sealed miniature X-ray tube based on a carbon nanotube field-emission electron source has been demonstrated. The diameter of the X-ray tube is 10 mm; the total length of the tube is 50 mm, and no external Vacuum Pump is required for the operation. The maximum tube voltage reaches up to 70 kV, and the X-ray tube generates intense X-rays with the air kerma strength of 108 Gy·cm2 min−1. In addition, X-rays produced from the miniature X-ray tube have a comparatively uniform spatial dose distribution.
Tatsuya Tomino - One of the best experts on this subject based on the ideXlab platform.
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Vacuum-based wet adhesion system for wall climbing robots -Lubricating action and seal action by the liquid-
2008 IEEE International Conference on Robotics and Biomimetics, 2009Co-Authors: Tohru Miyake, Hidenori Ishihara, Tatsuya TominoAbstract:This paper presents a Vacuum-based wet adhesion system for wall climbing robots. This system allows an adherability and low friction performance when a suction cup adheres on rough surface such as concrete wall with small Vacuum Pump. It utilizes a seal action and lubrication action of a liquid to make the robot body adherable and slidable on the surface. The measurements of friction and seal performance on rough surface and smooth glass verify the effectiveness of the wet adhesion system we proposed.
