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Catalysts for electrochemical ammonia oxidation:Trend,challenge,and promise

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Science China Materials 2022年第12期65卷 3334-3352页

作者： Sol A Lee Mi Gyoung Lee Ho Won jang Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Electrical and Computer Engineering University of TorontoToronto M5S 3G4OntarioCanada Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Republic of Korea

Developing sustainable and clean energy technology is critial to address the current energy and environmental *** an energy carrier,hydrogen has been getting attention due to its abundance,high energy density,and zero carbon *** to the difficulty of hydrogen storage and transport,the electro-oxidation of ammonia shows great potential for renewable energy since it satisfies both energy supply and environmental protection as a carbon-free fuel with high hydrogen ***,ammonia electro-oxidation is a sluggish reaction and shows low *** the complicated mechanism and intermediates is conducive to developing efficient electrocatalysts with high catalytic activity and *** review begins with the ammonia oxidation technologies and their *** two typical mechanisms for ammonia electro-oxidation,Oswin-Salomon mechanism and Gerischer-Mauerer mechanism,are discussed,and attention to the poisoning species is ***,the electrocatalysts for ammonia reaction are classified into Pt-based catalysts and non-noble metal-based catalysts,and their performances are reviewed with various *** on the progress on the electrochemical ammonia oxidation catalysts,the challenges and future insight on ammonia oxidation reaction are discussed and proposed.

关键词： NH3 oxidation reaction electrocatalysts green hydrogen

Neuroimaging characterization of recovery of impaired consciousness in patients with disorders of consciousness

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Neural Regeneration Research 2019年第7期14卷 1202-1207页

作者： Sung Ho jang Young hyeon Kwon Department of Physical Medicine and Rehabilitation College of MedicineYeungnam University

Elucidation of critical brain areas or structures that are responsible for recovery of impaired consciousness in patients with disorders of consciousness is important because it can provide information that is useful when developing therapeutic strategies for neurorehabilitation or neurointervention in patients with disorders of *** this review,studies that have demonstrated brain changes during recovery of impaired consciousness were *** studies used positron emission tomography,electroencephalography/transcranial magnetic stimulation,diffusion tensor tractography,and diffusion tensor tractography/*** majority of these studies reported on the importance of supratentorial areas or structures in the recovery of impaired *** important brain areas or structures that were identified were the prefrontal cortex,basal forebrain,anterior cingulate cortex,and parietal *** results have a clinically important implication that these brain areas or structures can be target areas for neurorehabilitation or neurointervention in patients with disorders of ***,most of studies were case reports;therefore,further original studies involving larger numbers of patients with disorders of consciousness are *** addition,more detailed information on the brain areas or structures that are relevant to the recovery of impaired consciousness is needed.

关键词： consciousness vegetative state minimally conscious state ascending reticular activating system diffusion tensor imaging neuroimaging neural regeneration review

Analysis and research on Maximum Power Point Tracking of Photovoltaic Array with Fuzzy Logic Control and Three-point Weight Comparison Method

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Science China(Technological Sciences) 2010年第8期53卷 2183-2189页

作者： LIN Kuang-jang LIN Chii-Ruey Department of Energy and Refrigerating Air-Conditioning Engineering NTUTTaipeiChina Department of Mechanical Engineering NTUTTaipeiChina

The Photovoltaic Array has a best optimal operating point where the array operating can obtain the maximum ***, the optimal operating point can be compromised by the strength of solar radiation,angle,and by the change of environment and *** to the constant changes in these conditions,it has become very difficult to locate the optimal operating point by following a mathematical ***,this study will focus mostly on the application of Fuzzy Logic Control theory and Three-point Weight Comparison Method in effort to locate the optimal operating point of solar panel and achieve maximum efficiency in power generation. The Three-point Weight Comparison Method is the comparison between the characteristic curves of the voltage of photovoltaic array and output power;it is a rather simple way to track the maximum *** Fuzzy Logic Control,on the other hand,can be used to solve problems that cannot be effectively dealt with by calculation rules,such as concepts,contemplation, deductive reasoning,and ***,this paper uses these two kinds of methods to make simulation successively. The simulation results show that,the Three-point Comparison Method is more effective under the environment with more frequent change of solar radiation;however,the Fuzzy Logic Control has better tacking efficiency under the environment with violent change of solar radiation.

关键词： Photovoltaic Array Maximum Power Point Tracking(MPPT) Fuzzy Logic Control Three-point Weight Comparison Method

Delayed activation of leg somatotopic fibers of an injured corticospinal tract in a patient with cerebral infarction

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Neural Regeneration Research 2022年第11期17卷 2551-2552页

作者： Min Jye Cho Sung Ho jang Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityNamkuDaeguRepublic of Korea

Stroke is a leading cause of major adult disabilities,and motor weakness is one of the most serious disability-related sequelae of *** of the motor recovery in stroke patients is reported to occur within 6months after stroke onset,and this period is deemed critical for motor recovery in stroke(Grefkes and Fink,2020;Olafson et al.,2021).

关键词： cerebral infarction

Two-Dimensional Fin Efficiency of Plate Fin-Tube Heat Exchangers Under Partially and Fully Wet Conditions

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Journal of Thermal Science 2002年第3期11卷 249-254页

作者： Jiin-Yuh jang Chien-Nan Lin Natl Cheng Kung Univ Dept Mech Engn Tainan 70101 Taiwan

This paper presents the two-dimensional analysis for the efficiency of continuous plate fin-tube heat exchangers in staggered and in-lined arrangements under the dry, partially wet, and fully wet conditions for different heat transfer coefficient (h = 20 W/m2K to h = 80 W/m2K) and air relative humidity over the full range from φ= 0 % to φ= 100%. It is shown that the fin efficiencies of the staggered arrangement are higher than those for the in-lined arrangement, and the fully wet fin efficiency is 10~20% lower than that for a dry fin. The conventional 1-D sector method underestimates the fin efficiency up to 4 % as compared to the 2-D analysis.

关键词： fin efficiency plate fin-tube partially and fully wet.

Diffusion tensor tractography characteristics of axonal injury in concussion/mild traumatic brain injury

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Neural Regeneration Research 2022年第5期17卷 978-982页

作者： Sung Ho jang You Sung Seo Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityDaeguRepublic of Korea

The main advantage of diffusion tensor tractography is that it allows the entire neural tract to be *** addition,configurational analysis of reconstructed neural tracts can indicate abnormalities such as tearing,narrowing,or discontinuations,which have been used to identify axonal injury of neural tracts in concussion *** review focuses on the characteristic features of axonal injury in concussion or mild traumatic brain injury(m TBI)patients through the use of diffusion tensor *** injury in concussion(m TBI)patients is characterized by their occurrence in long neural tracts and multiple injuries,and these characteristics are common in patients with diffuse axonal injury and in concussion(m TBI)patients with axonal ***,the discontinuation of the corticospinal tract is mostly observed in diffuse axonal injury,and partial tearing and narrowing in the subcortical white matter are frequently observed in concussion(m TBI)patients with axonal *** difference appears to be attributed to the observation that axonal injury in concussion(m TBI)patients is the result of weaker forces than those producing diffuse axonal *** addition,regarding the fornix,in diffuse axonal injury,discontinuation of the fornical crus has been frequently reported,but in concussion(m TBI)patients,many collateral branches form in the fornix in addition to these findings in many case *** is presumed that the impact on the brain in TBI is relatively weaker than that in diffuse axonal injury,and that the formation of collateral branches occurs during the fornix recovery *** the occurrence of axonal injury in multiple areas of the brain is an important feature of diffuse axonal injury,case studies in concussion(m TBI)have shown that axonal injury occurs in multiple neural *** axonal injury lesions in m TBI patients may persist for approximately 10 years after injury onset,the characteristics of axonal injury in co

关键词： axonal injury brain injury concussion diffusion tensor imaging diffusion tensor tractography mild traumatic brain injury neural tract

Non-interleaved chiral metasurfaces and neural networks enhance the spatial resolution of polarimetry

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Light(Science & Applications) 2024年第3期13卷 396-398页

作者： Jaewon jang Minsu Park Yeonsang Park Department of Physics Chungnam National UniversityDaejeon 34134Korea Institute of Quantum Systems Chungnam National UniversityDaejeon 34134Korea

Non-interleaved chiral metasurfaces for high-spatial-resolution polarimetry are proposed and ***,a convolutional neural network is incorporated to analyze interferometric images with the polarization state of light,an... 详细信息

关键词： parameters chiral resolution

Recovery of an injured ascending reticular activating system with recovery from a minimally conscious state to normal consciousness in a stroke patient: a diffusion tensor tractography study

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Neural Regeneration Research 2020年第9期15卷 1767-1768页

作者： Sung Ho jang Han Do Lee Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityDaeguRepublic of Korea Department of Physical Therapy College of Natural ScienceUlsan College UniversityUlsanRepublic of Korea

Consciousnessiscontrolledbytheascendingreticularactivating system (ARAS)(Teasdale and Jennett, 1974;jang and Lee, 2015;jang et al., 2016a). Scientific medical strategies for recovery in patients with impaired consciou... 详细信息

关键词： impaired system consciousness

Enhancing BiVO_(4)photoanode performance by insertion of an epitaxial BiFeO_(3)ferroelectric layer

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Journal of Energy Chemistry 2024年第2期89卷 71-78,I0003页

作者： Haejin jang Yejoon Kim Hojoong Choi Jiwoong Yang Yoonsung Jung Sungkyun Choi Donghyeon Lee Ho Won jang Sanghan Lee School of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

BiVO_(4)(BVO)is a promising material as the photoanode for use in photoelectrochemical ***,the high charge recombination and slow charge transfer of the BVO have been obstacles to achieving satisfactory photoelectrochemical *** address this,various modifications have been attempted,including the use of ferroelectric *** materials can form a permanent polarization within the layer,enhancing the separation and transport of photo-excited electron-hole *** this study,we propose a novel approach by depositing an epitaxial BiFeO_(3)(BFO)thin film underneath the BVO thin film(BVO/BFO)to harness the ferroelectric property of *** self-polarization of the inserted BFO thin film simultaneously functions as a buffer layer to enhance charge transport and a hole-blocking layer to reduce charge *** a result,the BVO/BFO photoanodes showed more than 3.5 times higher photocurrent density(0.65 mA cm^(-2))at 1.23 V_(RHE)under the illumination compared to the bare BVO photoanodes(0.18 m A cm^(-2)),which is consistent with the increase of the applied bias photon-to-current conversion efficiencies(ABPE)and the result of electrochemical impedance spectroscopy(EIS)*** results can be attributed to the self-polarization exhibited by the inserted BFO thin film,which promoted the charge separation and transfer efficiency of the BVO photoanodes.

关键词： Photoelectrochemical Photoanode BiVO_(4) Ferroelectric materials BiFeO_(3)