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  • 1
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    Oxygen vacancy tuned Ohmic-Schottky conversion for enhanced performance in β-Ga2O3 solar-blind ultraviolet photodetectors (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-07-17
    Description: β- Ga 2 O 3 epitaxial thin films were deposited using laser molecular beam epitaxy technique and oxygen atmosphere in situ annealed in order to reduce the oxygen vacancy. Metal/semiconductor/metal structured photodetectors were fabricated using as-grown film and annealed film separately. Au/Ti electrodes were Ohmic contact with the as-grown films and Schottky contact with the annealed films. In compare with the Ohmic-type photodetector, the Schottky-type photodetector takes on lower dark current, higher photoresponse, and shorter switching time, which benefit from Schottky barrier controlling electron transport and the quantity of photogenerated carriers trapped by oxygen vacancy significant decreasing.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 2
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    Quantum generative adversarial learning in a superconducting quantum circuit (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Generative adversarial learning is one of the most exciting recent breakthroughs in machine learning. It has shown splendid performance in a variety of challenging tasks such as image and video generation. More recently, a quantum version of generative adversarial learning has been theoretically proposed and shown to have the potential of exhibiting an exponential advantage over its classical counterpart. Here, we report the first proof-of-principle experimental demonstration of quantum generative adversarial learning in a superconducting quantum circuit. We demonstrate that, after several rounds of adversarial learning, a quantum-state generator can be trained to replicate the statistics of the quantum data output from a quantum channel simulator, with a high fidelity (98.8% on average) so that the discriminator cannot distinguish between the true and the generated data. Our results pave the way for experimentally exploring the intriguing long-sought-after quantum advantages in machine learning tasks with noisy intermediate–scale quantum devices.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Role of C. elegans TAT-1 protein in maintaining plasma membrane phosphatidylserine asymmetry (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-04-26
    Description: The asymmetrical distribution of phospholipids on the plasma membrane is critical for maintaining cell integrity and physiology and for regulating intracellular signaling and important cellular events such as clearance of apoptotic cells. How phospholipid asymmetry is established and maintained is not fully understood. We report that the Caenorhabditis elegans P-type adenosine triphosphatase homolog, TAT-1, is critical for maintaining cell surface asymmetry of phosphatidylserine (PS). In animals deficient in tat-1, PS is abnormally exposed on the cell surface, and normally living cells are randomly lost through a mechanism dependent on PSR-1, a PS-recognizing phagocyte receptor, and CED-1, which contributes to recognition and engulfment of apoptotic cells. Thus, tat-1 appears to function in preventing appearance of PS in the outer leaflet of plasma membrane, and ectopic exposure of PS on the cell surface may result in removal of living cells by neighboring phagocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darland-Ransom, Monica -- Wang, Xiaochen -- Sun, Chun-Ling -- Mapes, James -- Gengyo-Ando, Keiko -- Mitani, Shohei -- Xue, Ding -- R01 GM59083/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2008 Apr 25;320(5875):528-31. doi: 10.1126/science.1155847.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18436785" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Apoptosis ; Caenorhabditis elegans/cytology/genetics/*metabolism ; Caenorhabditis elegans Proteins/genetics/*metabolism ; Cell Membrane/*metabolism ; Germ Cells/cytology/metabolism ; Muscle Cells/cytology/metabolism ; Neurons/cytology/metabolism ; Phagocytosis ; Phosphatidylserines/*metabolism ; Phospholipid Transfer Proteins/genetics/*metabolism ; RNA Interference ; Recombinant Fusion Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Conservation. High value and long life--double jeopardy for tunas and billfishes (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-07-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collette, B B -- Carpenter, K E -- Polidoro, B A -- Juan-Jorda, M J -- Boustany, A -- Die, D J -- Elfes, C -- Fox, W -- Graves, J -- Harrison, L R -- McManus, R -- Minte-Vera, C V -- Nelson, R -- Restrepo, V -- Schratwieser, J -- Sun, C-L -- Amorim, A -- Brick Peres, M -- Canales, C -- Cardenas, G -- Chang, S-K -- Chiang, W-C -- de Oliveira Leite, N Jr -- Harwell, H -- Lessa, R -- Fredou, F L -- Oxenford, H A -- Serra, R -- Shao, K-T -- Sumaila, R -- Wang, S-P -- Watson, R -- Yanez, E -- New York, N.Y. -- Science. 2011 Jul 15;333(6040):291-2. doi: 10.1126/science.1208730. Epub 2011 Jul 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Marine Fisheries Service Systematics Laboratory, National Oceanic and Atmospheric Administration, USA. collettb@si.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21737699" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Conservation of Natural Resources ; *Endangered Species/statistics & numerical data ; Fisheries ; *Perciformes/physiology ; Population Dynamics ; Seafood/economics ; *Tuna/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Design of Backpack to Aid Elderly for the Mazu Touring Procession in Taiwan (2017)
    Institute of Physics (IOP)
    Details
    Publication Date: 2017-09-09
    Description: The Dajia Mazu Touring Procession is a 9-day long religious event held annually. However, for the elderly participants, it is a big burden especially in regards to physical strength. The goal of designing backpack is to reduce the physiological stress of elderly during the procession. Firstly, physical parameters were measured to explore the dimension parameters by testing. The height of the chair is different from that of the kneeling pad; a smooth curve was chosen to coordinate the two as the main outline of the backpack. Secondly, material selections based on following limits were considered: (1) acceptable weight and size, (2) intermediate price and (3) a design that is fitting to the Dajia event. The material and structural strength were evaluated for wood, bamboo, stainless steel. Two design concept were proposed, wood is selected for construction and testing by users. The texture of the backpack is Rush grass, it was built successfully to cover the backpack’s external sur...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 6
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    Hydrodynamic characteristics of the two-phase flow field at gas-evolving electrodes: numerical and experimental studies (2018)
    Royal Society
    Details
    Publication Date: 2018-05-03
    Description: Gas-evolving vertical electrode system is a typical electrochemical industrial reactor. Gas bubbles are released from the surfaces of the anode and affect the electrolyte flow pattern and even the cell performance. In the current work, the hydrodynamics induced by the air bubbles in a cold model was experimentally and numerically investigated. Particle image velocimetry and volumetric three-component velocimetry techniques were applied to experimentally visualize the hydrodynamics characteristics and flow fields in a two-dimensional (2D) plane and a three-dimensional (3D) space, respectively. Measurements were performed at different gas rates. Furthermore, the corresponding mathematical model was developed under identical conditions for the qualitative and quantitative analyses. The experimental measurements were compared with the numerical results based on the mathematical model. The study of the time-averaged flow field, three velocity components, instantaneous velocity and turbulent intensity indicate that the numerical model qualitatively reproduces liquid motion. The 3D model predictions capture the flow behaviour more accurately than the 2D model in this study.
    Keywords: chemical physics, fluid mechanics
    Electronic ISSN: 2054-5703
    Topics: Natural Sciences in General
    Published by Royal Society
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  • 7
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    YY1 regulates skeletal muscle regeneration through controlling metabolic reprogramming of satellite cells (2019)
    Springer Nature
    Details
    Publication Date: 2019
    Description: 〈sec〉〈st〉Synopsis〈/st〉〈p〉〈textbox textbox-type="graphic"〉〈p〉〈inline-fig〉〈/inline-fig〉〈/p〉〈/textbox〉〈/p〉 〈p〉Combining genetic mouse models and global expression profiling, the transcription factor YinYang1 (YY1) is shown to exert binary roles in muscle stem cells to switch energy metabolism and allow for expansion during muscle development and injury response.〈/p〉 〈p〉 〈l type="unord"〉〈li〉〈p〉Conditional deletion of YY1 in Pax7-expressing muscle progenitor cells causes defective muscle development and early postnatal death.〈/p〉〈/li〉 〈li〉〈p〉Inducible ablation of YY1 in adult muscle impairs acute injury induced muscle regeneration and aggravates chronic stress in muscular dystrophy mice.〈/p〉〈/li〉 〈li〉〈p〉YY1 deletion effects are cell-autonomous and reduce muscle stem cell activation and proliferation.〈/p〉〈/li〉 〈li〉〈p〉YY1 represses expression of mitochondrial genes in stem cells.〈/p〉〈/li〉 〈li〉〈p〉YY1 activates glycolytic genes during stem cell activation via increasing Hif1α protein stability.〈/p〉〈/li〉〈/l〉 〈/p〉〈/sec〉
    Print ISSN: 0261-4189
    Electronic ISSN: 1460-2075
    Topics: Biology , Medicine
    Published by Springer Nature on behalf of The European Molecular Biology Organization (EMBO).
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  • 8
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    YY1 regulates skeletal muscle regeneration through controlling metabolic reprogramming of satellite cells (2019)
    Springer Nature
    Details
    Publication Date: 2019
    Description: 〈p〉Skeletal muscle satellite cells (SCs) are adult muscle stem cells responsible for muscle regeneration after acute or chronic injuries. The lineage progression of quiescent SC toward activation, proliferation, and differentiation during the regeneration is orchestrated by cascades of transcription factors (TFs). Here, we elucidate the function of TF Yin Yang1 (YY1) in muscle regeneration. Muscle-specific deletion of YY1 in embryonic muscle progenitors leads to severe deformity of diaphragm muscle formation, thus neonatal death. Inducible deletion of YY1 in SC almost completely blocks the acute damage-induced muscle repair and exacerbates the chronic injury-induced dystrophic phenotype. Examination of SC revealed that YY1 loss results in cell-autonomous defect in activation and proliferation. Mechanistic search revealed that YY1 binds and represses mitochondrial gene expression. Simultaneously, it also stabilizes Hif1α protein and activates Hif1α-mediated glycolytic genes to facilitate a metabolic reprogramming toward glycolysis which is needed for SC proliferation. Altogether, our findings have identified YY1 as a key regulator of SC metabolic reprogramming through its dual roles in modulating both mitochondrial and glycolytic pathways.〈/p〉
    Print ISSN: 0261-4189
    Electronic ISSN: 1460-2075
    Topics: Biology , Medicine
    Published by Springer Nature on behalf of The European Molecular Biology Organization (EMBO).
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  • 9
    Electronic Resource
    Electronic Resource
    Inclusion of soybean meal in tilapia (Oreochromis niloticus x O. aureus) diets at two protein levels
    Amsterdam : Elsevier
    Aquaculture 65 (1987), S. 251-261 
    Details
    ISSN: 0044-8486
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0044-8486(87)90238-9
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamic adsorption properties of Kr and Xe isotopes in charcoal (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 181 (1994), S. 291-299 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The dynamic adsorption of Kr and Xe in activated charcoal were measured. The temperature dependence of breakthrough curves for individual isotopes of85mKr,87Kr,88Kr and135Xe have been determined from the γ-spectra at temperatures from 78 K to 291 K. The effective hold up and dynamic adsorption coefficient have been deduced. We find that adsorption is very sensitive to temperature and also depends on the size rather than on the mass of the adsorbed atom. Form total growth radioactivity, the time dependent brakthrough curves at the temperatures of 113, 195 and 220 K have been constructed. The curves were analyzed and compared with the model calculations. Fick's law describing the mass transfer of gas into porous solid was employed to obtain the adsorption coefficient from fitting the experimental data. The results show fairly good agreement between model predictions and the experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037635
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