检索结果-南通市图书馆

Energy & Environmental Materials 2024年第2期7卷 83-92页

作者： Hak Hyeon Lee Dong Su Kim Swagotom Sarker ji hoon choi Ho Seong Lee Hyung Koun Cho Department of Advanced Materials Science&Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-doSeoul 16419Korea Department of Advanced Materials Science&Engineering Kyungpook National University80Daehak-roBuk-guDaegu 41566Korea

Rh has been widely studied as a catalyst for the promising hydrazine oxidation reaction that can replace oxygen evolution reactions for boosting hydrogen production from hydrazine-containing *** Rh being expensive,only a few studies have examined its electrocatalytic mass ***,surface-limited cation exchange and electrochemical activation processes are designed to remarkably enhance the mass activity of *** atoms were readily replaced at the Ni sites on the surface of NiOOH electrodes by cation exchange,and the resulting RhOOH compounds were activated by the electrochemical reduction *** cation exchange-derived Rh catalysts exhibited particle sizes not exceeding 2 nm without agglomeration,indicating a decrease in the number of inactive inner Rh ***,an improved mass activity of 30 A mg_(Rh)^(-1)was achieved at 0.4 V versus reversible hydrogen ***,the two-electrode system employing the same CE-derived Rh electrodes achieved overall hydrazine splitting over 36 h at a stable low *** proposed surface-limited CE process is an effective method for reducing inactive atoms of expensive noble metal catalysts.

关键词： cation exchange synthesis electrochemical metallization hydrazine oxidation reaction mass activity rhodium catalyst

Electrodeposited copper oxides with a suppressed interfacial amorphous phase using mixed-crystalline ITO and their enhanced photoelectrochemical performances

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第7期82卷 277-286,I0007页

作者： ji hoon choi Hae-Jun Seok Dongchul Sung Dong Su Kim Hak Hyeon Lee Suklyun Hong Han-Ki Kim Hyung Koun Cho School of Advanced Materials Science and Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Physics Graphene Research Instituteand GRI-TPC International Research CenterSejong UniversitySeoul 05006Republic of Korea

The effectiveness of photoelectrochemical(PEC)water splitting is significantly restricted by insufficient light harvesting,rapid charge recombination,and slow water reduction *** the presence of amorphous phases in the interfaces hinders the overcome of these inherent limitations,a photoelectrode must be built ***,we artificially controlled the crystallographic orientation of indium tin oxide(ITO)to determine the orientation with the smallest lattice mismatch at the Cu_(2)O interface,thus significantly reducing the amorphous phase in the early stage of electrodeposition ***[222]/[400]mixed orientation ITO primarily exposed the{400}surface planes and accelerated charge transfer by forming an optimal interface with preferentially grown(111)oriented Cu_(2)O and minimized amorphous *** addition,the ITO surface energy was calculated using density functional theory to theoretically verify which plane is more active for growing the photoactivation *** rationally designed ITO/Cu_(2)O/Al-dope Zn O/TiO_(2)/Rh-P device,with each layer serving a specific purpose,achieved a photocurrent density of 8.23 mA cm^(-2)at 0 VRHEunder AM 1.5 G illumination,providing a standard method for effective solar-to-hydrogen conversion photocathodes.

关键词： Photoelectrochemical water splitting Cu_(2)O ITO Hydrogen Surface energy DFT

Pre-operative predictive factors for gallbladder cholesterol polyps using conventional diagnostic imaging

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第44期14卷 6831-6834页

作者： ji-hoon choi Jung-Won Yun Yong-Sung Kim Eun-A Lee Sang-Tae Hwang Yong-Kyun Cho Hong-Joo Kim Jung-Ho Park Dong-Il Park Chong-Il Sohn Woo-Kyu Jeon Byung-Ik Kim Hyoung-Ook Kim Jun-Ho Shin Department of Internal Medicine Kangbuk Samsung HospitalSungkyunkwan University School of MedicineSeoul 110-746South Korea Department of Surgery Kangbuk Samsung HospitalSungkyunkwan University School of MedicineSeoul 110-746South Korea

AIM： To determine the clinical data that might be useful for differentiating benign from malignant gallbladder （GB） polyps by comparing radiological methods, including abdominal ultrasonography （US） and computed tomography （CT） scanning, with postoperative pathology findings. METHODS： Fifty-nine patients underwent laparoscopic cholecystectomy for a GB polyp of around 10 ram. They were divided into two groups, one with cholesterol polyps and the other with non-cholesterol polyps. Clinical features such as gender, age, symptoms, size and number of polyps, the presence of a GB stone, the radiologically measured maximum diameter of the polyp by US and CT scanning, and the measurements of diameter from postoperative pathology were recorded for comparative analysis. RESULTS： Fifteen of the 41 cases with cholesterol polyps （36.6%） were detected with US but not CT scanning, whereas all 18 non-cholesterol polyps were observed using both methods. In the cholesterol polyp group, the maximum measured diameter of the polyp was smaller by CT scan than by ***, the discrepancy between those two scanning measurements was greater than for the non- cholesterol polyp group. CONCLUSION： The clinical signs indicative of a cholesterol polyp include：（1） a polyp observed by US but not observable by CT scanning, （2） a smaller diameter on the CT scan compared to US, and （3） a discrepancy in its maximum diameter between US and CT measurements. In addition, US and the CT scan had low accuracy in predicting the polyp diameter compared to that determined by postoperative pathology.

关键词： Cholesterol Polyps Gallbladder Computed tomography Ultrasonography

Therapeutic potential of exercise-hormone irisin in Alzheimer's disease

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1555-1564页

作者： Eunhee Kim Rudolph ETanzi Se hoon choi Genetics and Aging Research Unit MassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General HospitalHarvard Medical SchoolCharlestownMAUSA McCance Center for Brain Health Massachusetts General HospitalBostonMAUSA

Irisin is a myokine that is generated by cleavage of the membrane protein fibronectin type Ⅲ domain-containing protein 5(FNDC5) in response to physical exercise. Studies reveal that irisin/FNDC5 has neuroprotective functions against Alzheimer's disease, the most common form of dementia in the elderly, by improving cognitive function and reducing amyloid-β and tau pathologies as well as neuroinflammation in cell culture or animal models of Alzheimer's disease. Although current and ongoing studies on irisin/FNDC5 show promising results, further mechanistic studies are required to clarify its potential as a meaningful therapeutic target for alleviating Alzheimer's disease. We recently found that irisin treatment reduces amyloid-β pathology by increasing the activity/levels of amyloid-β-degrading enzyme neprilysin secreted from astrocytes. Herein, we present an overview of irisin/FNDC5's protective roles and mechanisms against Alzheimer's disease.

关键词： Alzheimer's disease exercise fibronectin typeⅢdomain-containing protein 5(FNDC5) irisin

Comments to young surgeons concerning laparoscopic spleenpreserving D2 lymph node dissection for advanced gastric cancer on the upper body

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Cancer Research 2014年第3期26卷 231-233页

作者： Yoon Young choi ji Yeong An Woo jin Hyung Sung hoon Noh Department of Surgery Yonsei University Health System Yonsei University College of Medicine

Qualified radical gastrectomy with lymph node dissection is very important to the prognosis of patients with gastric cancer. Now D2 lymph node dissection is standard procedure for gastric cancer surgery, and spleen hilar lymph node dissection is mandatory for gastric cancer in upper body. Because the anatomy of vessels in this area is very complicated, D2 lymph node dissection is technical challenging not only for open gastrectomy but also for laparoscopic one. Adapting a new technique is important to all surgeons, but we surgeons should always consider a patient＇s safety as the most important factor during surgery and that efforts should be based on scientific rationale with oncologic principles. I hope that the recent report by Huang et al. about laparoscopic spleen preserving hilar lymph node dissection would be helpful to young surgeons who will perform laparoscpic total gastrectomy for gastric cancer.

关键词： Gastric cancer lymph node dissection laparoscopy spleen

Decellularized sciatic nerve matrix as a biodegradable conduit for peripheral nerve regeneration

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2018年第10期13卷 1796-1803页

作者： Jongbae choi Jun Ho Kim ji Wook Jang Hyun Jung Kim Sung hoon choi Sung Won Kwon R&D Center Genewel Co.Ltd. Department of Surgery CHA Bundang Medical CenterCHA University

The use of autologous nerve grafts remains the gold standard for treating nerve defects, but current nerve repair techniques are limited by donor tissue availability and morbidity associated with tissue loss. Recently, the use of conduits in nerve injury repair, made possible by tissue engineering, has shown therapeutic potential. We manufactured a biodegradable, collagen-based nerve conduit containing decellularized sciatic nerve matrix and compared this with a silicone conduit for peripheral nerve regeneration using a rat model. The collagen-based conduit contains nerve growth factor, brain-derived neurotrophic factor, and laminin, as demonstrated by enzyme-linked immunosorbent assay. Scanning electron microscopy images showed that the collagen-based conduit had an outer wall to prevent scar tissue infiltration and a porous inner structure to allow axonal growth. Rats that were implanted with the collagen-based conduit to bridge a sciatic nerve defect experienced significantly improved motor and sensory nerve functions and greatly enhanced nerve regeneration compared with rats in the sham control group and the silicone conduit group. Our results suggest that the biodegradable collagen-based nerve conduit is more effective for peripheral nerve regeneration than the silicone conduit.

关键词： nerve regeneration biodegradable decellularized collagen nerve conduit growth factor peripheral nerve injury regeneration silicone conduit rat model

Visualization of flow structures inside a conical spouted bed by electrical capacitance volume tomography

在线全文

学校读者我要写书评

暂无评论

Particuology 2019年第1期17卷 15-25页

作者： hoon Chae Park Hang Seok choi Department of Environmental Engineering Yonsei UniversityWonju 26493Republic of Korea

Electrical capacitance volume tomography (ECVT) was conducted to measure instantaneous gas–solid flow structures in a conical spouted bed. The sensor has 24 electrodes/channels and was used to make three-dimensional measurements of the solid volume fraction. Flow structures in the conical spouted bed were analyzed using quantitative ECVT images. Three-dimensional images of gas–solid flow structures and time-averaged vertical and radial solid volume fraction profiles are presented. Different fluidization regimes in spouted beds were characterized by analyzing pressure fluctuation signals and ECVT images. ECVT was shown to be robust and powerful for the three-dimensional visualization and quantitative measurement of a gas–solid fluidization system.

关键词： Conical spouted bed Electrical capacitance volume tomography Multiphase flow

Importance of Adaptive Photometric Augmentation for Different Convolutional Neural Network

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第9期72卷 4433-4452页

作者： Saraswathi Sivamani Sun Il Chon Do Yeon choi Dong hoon Lee ji Hwan Park AI Reliability Lab ThinkforBL Consultancy ServicesGangnamSeoulKorea Department of Biosystems Engineering Chungbuk National UniversityCheongju-siChungcheongbuk-do28644Korea

Existing segmentation and augmentation techniques on convolutional neural network(CNN)has produced remarkable progress in object ***,the nominal accuracy and performance might be downturned with the photometric variation of images that are directly ignored in the training process,along with the context of the individual CNN *** this paper,we investigate the effect of a photometric variation like brightness and sharpness on different *** observe that random augmentation of images weakens the performance unless the augmentation combines the weak limits of photometric *** approach has been justified by the experimental result obtained from the PASCAL VOC 2007 dataset,with object detection CNN algorithms such as YOLOv3(You Only Look Once),Faster R-CNN(Region-based CNN),and SSD(Single Shot Multibox Detector).Each CNN model shows performance loss for varying sharpness and brightness,ranging between−80%to 80%.It was further shown that compared to random augmentation,the augmented dataset with weak photometric changes delivered high performance,but the photometric augmentation range differs for each ***,we discuss some research questions that benefit the direction of the *** results prove the importance of adaptive augmentation for individual CNN model,subjecting towards the robustness of object detection.

关键词： Object detection photometric variation adaptive augmentation convolutional neural network

A digital application for implementing the ICD-11 traditional medicine chapter

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Medicine 2020年第6期18卷 455-458页

作者： Seung-hoon choi Department of Life Convergence Graduate SchoolDankook UniversityYonginGyeonggi-do 16890Republic of Korea

On May 25,2019,the World Health Assembly approved the eleventh revision of the International Statistical Classification of Diseases and Related Health Problems(ICD-11),containing a chapter on traditional *** means that the traditional East Asian medicine(TEAM)is now officially recognized as a part of mainstream medical ***,the patterns presented in the ICD-11 traditional medicine chapter are only the tip of the iceberg of TEAM clinical practice,and it will be necessary to supplement and upgrade the *** order to implement this,objectification and standardization of TEAM must be premised,and grafting with proper modern science and technology is *** Identification and Prescription Expert-11(PIPE-11),which is a TEAM clinical decision support system,adopts vastly from clinical literature on pattern identification and the *** adopting the rule-based reasoning method,the way of diagnosis and prescription by a TEAM practitioner in actual clinical practice is implemented as it ***-11 could support to improve both the accuracy of medical diagnosis and the reliability of the medical treatment of TEAM in clinical *** the field of research,it might facilitate the usage for reliable reference for symptoms and signs retrieval and patient *** the field of education,it can provide a high level of training for learning pattern identification and prescription,and further be used to reinforce skills of diagnosis and prescription by providing self-simulation ***,PIPE-11 as a digital application is expected to support the traditional medicine chapter of ICD-11 to successfully contribute to the improvement of human health.

关键词： ICD-11 PIPE-11 Traditional medicine Clinical decision support system Formula Pattern

Landau-Ginzburg/Calabi-Yau Correspondence via Wall-Crossing

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2017年第4期38卷 883-900页

作者： jinwon choi Young-hoon KIEM Department of Mathematics Sookmyung Women’s University Department of Mathematics Seoul National University

Landau-Ginzburg/Calabi-Yau correspondence claims the equivalence between the Gromov-Witten theory and the Fan-Jarvis-Ruan-Witten theory. The authors survey recently developed wall-crossing approach to the Landau-Ginzb... 详细信息

关键词： Gromov-Witten invariant Fan-Jarvis-Ruan-Witten invariant Moduli space Quasimap Wall-crossing