检索结果-南通市图书馆

npj Flexible Electronics 2023年第1期7卷 388-397页

作者： Soo-Won Choi jae-ho park Ji-Woo Seo Chaewon Mun Yonghun Kim Pungkeun Song Myunghun Shin Jung-Dae Kwon Surface&Nano Materials Division Korea Institute of Materials ScienceChangwonGyeongnam 51508Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea Cell R&D Team Hanhwa QCells202 Sansusandan 2-roLwol-myeonJincheon-gunChungcheongbuk-do 27816Republic of Korea School of Electronics and Information Engineering Korea Aerospace UniversityGoyangGyeonggi 10540Republic of Korea Department of Advance Materials Engineering University of Science and Technology(UST)217 Gajeong-roYuseong-guDaejeon 34113Republic of Korea

Flexible and transparent thin-film silicon solar cells were fabricated and optimized for building-integrated photovoltaics and bifacial operation.A laser lift-off method was developed to avoid thermal damage during the transfer of light-scattering structures onto colorless polyimide substrates and thus enhance front-incidence photocurrent,while a dual n-type rear window layer was introduced to reduce optical losses,facilitate electron transport for rear incidence,and thus enhance performance during bifacial *** introduction of the window layer increased the rear-to-front power conversion efficiency ratio to~86%.The optimized bifacial power conversion efficiency for front and rear irradiances of 1 and 0.3 sun,respectively,equaled 6.15%,and the average transmittance within 500–800 nm equaled 36.9%.Additionally,the flexible and transparent solar cells fabricated using laser lift-off exhibited good mechanical reliability(i.e.,sustained 500 cycles at a bending radius of 6 mm)and were therefore suitable for building-integrated photovoltaics.

关键词： transparent scattering film

Usefulness of colonic tattooing using indocyanine green in patients with colorectal tumors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2018年第13期6卷 632-640页

作者： jae ho park Hee Seok Moon In Sun Kwon Gee Young Yun Seo Hee Lee Dae Hwa park Ju Seok Kim Sun Hyung Kang Eaum Seok Lee Seok Hyun Kim jae Kyu Sung Byung Seok Lee Hyun Yong Jeong Division of Gastroenterology Department of Internal Medicine Chungnam National University Hospital Chungnam National University college of Medicine Clinical Trials Center Chungnam National University Hospital

AIM To prove that tattooing using indocyanine green(ICG) is feasible in laparoscopic surgery for a colon *** From January 2012 to December 2016, all patients who underwent laparoscopic colonic surgery were retrospectively screened, and 1010 patients with colorectal neoplasms were included. Their lesions were tattooed with ICG the day before the operation. The tattooed group(TG) included 114 patients, and the non-tattooed group(NTG) was selected by propensity score matching of subjects based on age, sex, tumor staging, and operation method(n = 228). In total, 342 patients were enrolled. Between the groups, the changes in [Delta(Δ), preoperative-postoperative] the hemoglobin and albumin levels, operation time, hospital stay, oral ingestion period, transfusion, and perioperative complications were compared. RESULTS Preoperative TG had a shorter operation time(174.76 ± 51.6 min vs 192.63 ± 59.9 min, P hospital stay(9.55 ± 3.36 d vs 11.42 ± 8.23 d, P hospital stay, oral ingestion period, Δ hemoglobin, and Δ albumin results than those of the N1 or N2 group. The operation methods affected the results, and laparoscopic anterior resection(LAR) showed similar results. however, for left and right hemicolectomy, both groups showed no difference in operation time or hospital *** Preoperative tattooing with ICG is useful for laparoscopic colectomy, especially in the N0 colon cancer group and LAR.

关键词： Colorectal neoplasm Laparoscopic surgery Endoscopic tattoo Indocyanine green Perioperative

Optimization of post-warranty sequential inspection for second-hand products

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 Systems Engineering and Electronics 2017年第4期28卷 793-800页

作者： Dae-Kyung Kim jae-Hak Lim Dong ho park Department of Statistics Chonbuk National University Department of Management & Accounting Hanbat National University Industry Academic Cooperation Foundation Hallym University

This paper considers an optimal sequential inspection schedule for a second-hand product after that the free nonrenewable warranty is expired. The length of warranty is prespecified and during the warranty period, the product is minimally repaired by the dealer when it fails. Following the expiration of the non-renewing warranty, the product is inspected and upgraded sequentially a fixed number of times at the expenses of the *** each inspection, the failure rate of the product is reduced proportionally so that the product is upgraded. The product is assumed to deteriorate as it ages and the replacement of the product occurs when a fixed number of inspections are rendered. In addition,the intervals between two successive inspections are assumed to decrease monotonically. The main objective of this paper is to determine the optimal improvement level to upgrade the product at each inspection so that the expected maintenance cost during the life cycle of the product is minimized from the perspective of the customer. Under the given cost structures, we derive an explicit formula to obtain the expected maintenance cost incurred during the life cycle of the product and discuss the method to find the optimal level of the improvement analytically in case the failure times follow the Weibull distribution. Numerical results are analyzed to observe the impact of relevant parameters on the optimal solution.

关键词： second-hand product sequential inspection upgrade action life cycle of the product expected maintenance cost free non-renewable warranty

Fabrication and Mechanical Properties of Sm2O3 Doped CeO2 Reinforced Ti3AlC2 Nano Composite

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2004年第Z2期22卷 85-88页

作者： jae ho Han Sang Whan park Young Do Kim Division of Materials Science & Engineering Hanyang UniversitySeoul133-791Korea Korea Institute of Science and TechnologyMulti-Functional Ceramics Research CenterSeoul136-791Korea Division of Materials Science & EngineeringHanyang UniversitySeoul133-791Korea

The fabrication process of Sm2O3 doped CeO2 reinforced Ti3AlC2 nano composites including the nano particle dispersion process by a hetero-coagulation process was developed using in-situ synthesis and densification process of Ti3AlC2. The effects of Sm2O2 doped CeO2 nano particles on mechanical properties of Ti3AlC2 were investigated. It was found that the presence of 20SDC nano particles in Ti3AlC2 was very effective to improve the mechanical properties of Ti3AlC2 without spoiling the unique characteristics of Ti3AlC2temary carbide.

关键词： nano ceramic composite Ti3AlC2 CeO2 fabrication rare earths

Improved thermal performance of a hydronic radiant panel heating system by the optimization of tube shapes

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 Zhejiang University-Science A(Applied Physics & Engineering) 2011年第6期12卷 428-437页

作者： Young T.CHAE Kwang ho LEE jae Sung park School of Architecture University of Illinois at Urbana-Champaign Department of Architectural Engineering Hanbat National University Department of Mechanical Engineering University of Illinois at Urbana-Champaign

The thermal performance enhancement of the hydronic radiant floor heating system by tube shape refinements is investigated in this *** analytical and detailed numerical modelings are carried out to predict the performance of the radiant *** the simple analytical model briefly investigates the possibility of the effect of the tube shape improvement with the parametric analysis,the commercial computational fluid dynamics(CFD) code(Ansys/CFX) is used to perform the detailed 3D analysis under different tube shape *** fin thickness,the number of fins,and the tube thermal conductivity turn out to have significant effects on the radiant system *** potential energy saving impacts of the tube shape refinements are also *** tube shape improvement turns out to increase the floor surface temperature and to decrease the hot water temperature drop across the system,resulting in heating energy savings.

关键词： Radiant panel system Analytical modeling Computational fluid dynamics(CFD) Tube shape Energy saving

miR-215 overexpression distinguishes ampullary carcinomas from pancreatic carcinomas

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2015年第3期14卷 325-329页

作者： Dong ho Choi Sang jae park Hark Kyun Kim Department of Surgery Hanyang University School of Medicine Center for Liver Cancer National Cancer Center Biomolecular Function Research Branch National Cancer Center

Distinguishing ampullary carcinoma from pancreatic carcinoma is important because of their different prognoses. microRNAs are differentially expressed according to the tissue of origin. however, there is rare research on the differential diagnosis between the two types of cancers by microRNA in periampullary cancers. The present study was undertaken to compare microRNA profiles between ampullary and pan- creatic carcinomas using microarrays, miR-215 was most significantly overexpressed in ampullary carcinomas; whereas the expressions of miR-134 and miR-214 were significantly lower in ampuUary carcinomas than in pancreatic carcino- mas. When these discriminatory microRNAs were applied to liver metastases, they were correctly predicted for the tissue of origin. Although this study is limited by small sample size, striking difference in microRNA expression and concordant expression of discriminating microRNAs in primary tumors and metastases suggest that these novel discriminatory mi- croRNAs warrant future validation.

关键词： ampulla of Vater pancreatic cancer gene expression

Bilateral musculocutaneous neuropathy:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第5期9卷 1237-1246页

作者： Ji Won Jung Yu Chan park jae Young Lee jae Hyeon park Seong ho Jang Department of Rehabilitation Medicine Hanyang University HospitalSeoul 04763South Korea Department of Rehabilitation Medicine Hanyang University Guri HospitalGuri 11923South Korea

BACKGROUND Isolated musculocutaneous nerve injury is a rare ***,we report the first case of bilateral musculocutaneous neuropathy after vigorous stretching of both upper extremities with normal results of sensory nerve action *** should be aware of this rare condition that can appear *** addition,the interpretation of the aberrant electrodiagnostic study results of this case was *** SUMMARY A 29-year-old male complaining of bilateral forearm tingling and upper extremity weakness visited the outpatient *** symptoms began 6 mo prior,and he visited another hospital before visiting our *** diagnosis was not made even after cervical spine magnetic resonance imaging,electrodiagnostic study,brain magnetic resonance imaging,and arteriography were *** patient performed unique exercises that stretched the pectoralis minor and coracobrachialis *** the follow-up electrodiagnostic study,abnormal spontaneous activities in the bilateral biceps and brachialis muscles were *** patient was diagnosed with bilateral musculocutaneous *** pulse therapy was administered for approximately 6 *** treatment,his muscle strength returned to the predisease *** Clinicians should be aware of this condition,have adequate understanding of anatomy,and advise to correct inappropriate exercises.

关键词： Musculocutaneous nerve Peripheral neuropathy Electrodiagnosis Exercise Diagnosis Case report

Clinical characteristics and treatment of inflammatory bowel disease: A comparison of Eastern and Western perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第33期20卷 11525-11537页

作者： Soo Jung park Won ho Kim jae Hee Cheon Department of Internal Medicine and Institute of Gastroenerology Yonsei University College of Medicine Seoul 120-752 South Korea

Inflammatory bowel disease(IBD) is a chronic, relapsing intestinal inflammatory disorder with unidentified causes. Both environmental factors and genetic aspects are believed to be crucial to the pathogenesis of IBD. The incidence and prevalence of IBD have recently been increasing throughout Asia, presumably secondary to environmental changes. This increasing trend in IBD epidemiology necessitates specific health care planning and education in Asia. To this end, we must gain a precise understanding of the distinctive clinical and therapeutic characteristics of Asian patients with IBD. The phenotypes of IBD reportedly differ considerably between Asians and Caucasians. Thus, use of the same management strategies for these different populations may not be appropriate. Moreover, investigation of the Asian-specific clinical aspects of IBD offers the possibility of identifying causative factors in the pathogenesis of IBD in this geographical area. Accordingly, this review summarizes current knowledge of the phenotypic manifestations and management practices of patients with IBD, with a special focus on a comparisonof Eastern and Western perspectives.

关键词： Crohn's disease Ulcerative colitis Inflam-matory bowel disease Clinical characteristics Treat-ment Asia

Fabrication and characterization of Ag flake hybrid circuits with IPL-sintering

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 Materials Science & Technology 2020年第18期52卷 13-18页

作者： Choong-jae Lee Kwang-ho Jung Kyung Deuk Min Bum-Geun park Seung-Boo Jung School of Advanced Materials Science Engineering Sungkyunkwan University2066 Seobu-roJangan-guSuwon-si16419Republic of Korea Visual Display Business Samsung Electronics Co.Ltd.129Samsung-roYeongtong-guSuwon-si16677Republic of Korea

The study of photonic sintering has gained interest based on the advantages of fast processing at room ***,printed electronics made from photonic sintering with an intensive pulsed light(IPL)energy source exhibit more mechanical instability than those made from conventional thermal sintering *** solve the mechanical instability problems,we fabricated Ag flake hybrid pastes with a variety of concentrations of Ag flake(0,25,50,75,and 100 wt.%).All of the screen-printed hybrid Ag circuits were fabricated on polyimide substrates and were sintered at 3.5 *** porosity was analyzed using the Brunauer-Emmett-Teller *** IPC(Packaging Electronic Circuits)sliding test was performed to analyze the flexibility of the screen-printed Ag flake hybrid *** adhesion strength of the hybrid circuits was evaluated with a roll-type 90°peel *** hybrid Ag printed circuit showed improvements in both the flexibility and adhesion strength with the addition of Ag flake.

关键词： Low-temperature sintering Flexibility Flaky powders Adhesion strength Intensive pulsed light

Effects of Al addition on microstructure and mechanical properties of extruded Mg-3Bi alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2022年第7期10卷 1887-1898页

作者： Sang-Cheol Jin jae Won Cha Jun ho Bae Hui Yu Sung Hyuk park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Implementation Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China

Effects of Al addition to a Mg±Bi binary alloy on its microstructural characteristics and tensile properties after extrusion are investigated via extrusion of Mg-3Bi±x Al(x=0,1,and 2 wt%)billets and analysis of the extruded *** Al addition negligibly affects the second-phase particles of the extruded alloy;however,an increase in the Al content causes significant decreases in the average grain size and maximum texture intensity of the extruded material owing to an increase in the area fraction of dynamically recrystallized(DRXed)*** Al addition improves the strength of the extruded alloy;this improvement is attributed to the enhanced grain-boundary hardening and solid-solution hardening effects induced by grain refinement and Al solute atoms,*** the Al content increases from 0 wt%to 1 wt%and 2 wt%,the tensile elongation increases substantially from 2.8%to 9.4%and 16.9%,*** reduction in the number and size of un DRXed grains with increasing Al content suppresses the formation and coalescence of cracks in the un DRXed grains during tension,which results in a significant improvement in the tensile ductility of the extruded *** tensile deformation,large undesirable twins that act as crack initiation sites are locally formed in the un DRXed grains of the Mg-3Bi alloy,whereas relatively smaller twins are uniformly formed in both the DRXed and the un DRXed grains of the Mg-3Bi-2Al ***,the extruded Mg-3Bi-2Al alloy has a substantially higher tensile yield strength±elongation product(2924 MPa%)than the extruded Al-free B3 alloy(381 MPa%).

关键词： Mg-Bi-Al alloy Extrusion Microstructure Strength Ductility