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Energy & Environmental Materials 2024年第1期7卷 147-152页

作者： Sun Kyung Hwang Ik Jae Park Se Won Seo Jae Hyun Park So Jeong Park jin young kim Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Korea Department of Applied Physics Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials and Systems Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Korea

In spite of the high potential economic feasibility of the tandem solar cells consisting of the halide perovskite and the kesterite Cu2ZnSn(S,Se)4(CZTSSe),they have rarely been demonstrated due to the difficulty in implementing solution-processed perovskite top cell on the rough surface of the bottom ***,we firstly demonstrate an efficient monolithic two-terminal perovskite/CZTSSe tandem solar cell by significantly reducing the surface roughness of the electrochemically deposited CZTSSe bottom *** surface roughness(R_(rms))of the CZTSSe thin film could be reduced from 424 to 86 nm by using the potentiostatic mode rather than using the conventional galvanostatic mode,which can be further reduced to 22 nm after the subsequent ion-milling *** perovskite top cell with a bandgap of 1.65 eV could be prepared using a solution process on the flattened CZTSSe bottom cell,resulting in the efficient perovskite/CZTSSe tandem solar *** the current matching between two subcells involving the thickness control of the perovskite layer,the best performing tandem device exhibited a high conversion efficiency of 17.5%without the hysteresis effect.

关键词： CZTSSe monolithic tandem solar cells perovskite solution process surface roughness control

Environmental Sound Event Detection in Wireless Acoustic Sensor Networks for Home Telemonitoring

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China Communications 2017年第9期14卷 1-10页

作者： Hyoung-Gook kim jin young kim The Dept. of Electronics Convergence Engineering Kwangwoon University The Dept. of Electronics and Computer Engineering Chonnam National University

In this paper, we present an approach to improve the accuracy of environmental sound event detection in a wireless acoustic sensor network for home monitoring. Wireless acoustic sensor nodes can capture sounds in the home and simultaneously deliver them to a sink node for sound event detection. The proposed approach is mainly composed of three modules, including signal estimation, reliable sensor channel selection, and sound event detection. During signal estimation, lost packets are recovered to improve the signal quality. Next, reliable channels are selected using a multi-channel cross-correlation coefficient to improve the computational efficiency for distant sound event detection without sacrificing performance. Finally, the signals of the selected two channels are used for environmental sound event detection based on bidirectional gated recurrent neural networks using two-channel audio features. Experiments show that the proposed approach achieves superior performances compared to the baseline.

关键词： sound event detection wirelesssensor network gated recurrent neural net-work multichannel audio

Complete peritonectomy and intraperitoneal chemotherapy for recurrent rectal cancer with peritoneal metastasis

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World Journal of Gastroenterology 2009年第6期15卷 756-757页

作者： Jung Wook Huh young jin kim Hyeong Rok kim Department of Surgery Chonnam National University Hwasun Hospital and Medical SchoolGwangju 501-757South Korea

A 68-year-old man underwent laparoscopic low anterior resection for rectal carcinoma in December *** 19 mo after the operation,he developed recurrent rectal cancer with peritoneal metastasis. In September 2008,he subsequently underwent a laparotomy with a peritonectomy,omentectomy, splenectomy,and a Hartmann *** intraperitoneal oxaliplatin 750 mg was administered. The patient was discharged with no postoperative complications and has been well with postoperative FOLFOX chemotherapy.

关键词： Peritonectomy Peritoneal metastasis Recurrent rectal cancer

Semi-crystalline photovoltaic polymers with siloxane-terminated hybrid side-chains

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Science China Chemistry 2017年第4期60卷 528-536页

作者： Yuxiang Li Seyeong Song Song Yi Park jin young kim Han young WOO Department of Cogno-Mechatronics Engineering Pusan National University Miryang 627-706 Republic of Korea Department of Energy and Chemical Engineering Ulsan National Institute of Science and Technology Ulsan 689-798 Republic of Korea Department of Chemistry Korea University Seoul 136-713 Republic of Korea

Three types of semi-cry stalline photovoltaic polymers were synthesized by incorporating a siloxane-terminated organic/inorganic hybrid side-chain and changing the number of fluorine substituents.A branch point away from a polymer main backbone in the siloxane-containing side-chains and the intra-and/or interchain noncovalent coulombic interactions enhance a chain planarity and facile interchain *** resulting polymers formed strongly agglomerated films with high roughness,suggesting strong intermolecular *** optical band gap of ca.1.7 eV was measured for all polymers with a pronounced shoulder peak due to tight π-π *** increasing the fluorine substituents,the frontier energy levels decreased and preferential face-on orientation was *** siloxane-terminated side-chains and fluorine substitution promoted the intermolecular packing,showing well resolved lamellar scatterings up to(300) for this series of polymers in the grazing incidence wide angle X-ray scattering *** PPsiDTBT,PPsiDTFBT and PPsiDT2 FBT devices showed a power conversion efficiency of 3.16%,4.40%and 5.65%,respectively,by blending with PC_(71)***-type bimolecular charge recombination was similar for three polymeric solar *** main loss in the photocurrent generation for PPsiDTBT:PC_(71)BM was interpreted to originate from the trap assisted charge recombination by measuring light-intensity dependent short-circuit current density(J_(SC)) and open-circuit voltage(V_(Oc)).Our results provide a new insight into the rational selection of solubilizing substituents for optimizing crystalline interchain packing with appropriate miscibility with PC71 BM for further optimizing polymer solar cells.

关键词： siloxane side-chain fluorine substitution semi-crystalline charge transport

Passivation engineering via silica‐encapsulated quantum dots for highly sensitive photodetection

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Carbon Energy 2023年第9期5卷 49-62页

作者： Ji Yun Chun Byung Gi kim jin young kim Woongsik Jang Dong Hwan Wang School of Integrative Engineering Chung‐Ang UniversitySeoulRepublic of Korea

Organometal halide perovskites are promising semiconducting materials for photodetectors because of their favorable optoelectrical *** nanoscale perovskite materials such as quantum dots(QDs)show novel behavior,they have intrinsic stability *** this study,an effectively silane barrier-capped quantum dot(QD@APDEMS)is thinly applied onto a bulk perovskite photosensitive layer for use in ***@APDEMS is synthesized with a silane ligand with hydrophobic CH_(3)-terminal groups,resulting in excellent dispersibility and durability to enable effective *** introduction of the QD@APDEMS layer results in the formation of a lowdefect perovskite film with enlarged *** is attributed to the grain boundary interconnection effect via interaction between the functional groups of QD@APDEMS and uncoordinated Pb^(2+)in grain *** passivating the grain boundaries,where various trap sites are distributed,hole chargecarrier injection and shunt leakage can be ***,from the energy point of view,the deep highest occupied molecular orbital(HOMO)level of QD@APDEMS can work as a hole charge injection *** charge dynamics(generation,transfer,and recombination properties)and reduced trap density of QD@APDEMS are *** this perovskite film is used in a photodetector,the device performance(especially the detectivity)stands out among existing perovskites evaluated for energy sensing device applications.

关键词： grain boundary passivation perovskite quantum dots photodetectors photosensitive layers trap

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胃十二指肠支架置入术

中华介入放射学电子杂志 2024年第2期12卷 97-105页

作者：金建永曹家玮宋昊永金镇亨袁航胡鸿涛尹彰振首尔国立大学医学院盆唐医院放射科韩国首尔463-707 南方医科大学广东省人民医院(广东省医学科学院)微创介入科广东广州510627 郑州大学附属肿瘤医院(河南省肿瘤医院)放射介入科河南郑州450008 蔚山大学医学院峨山医院放射科放射研究所韩国首尔138-736

胃出口梗阻是晚期胰腺、胃和十二指肠恶性肿瘤的一种晚期并发症。胃出口梗阻患者会出现难治性恶心、呕吐和厌食,进而可能导致电解质失衡、脱水和营养不良。此外,这些患者持续存在误吸和肺炎的风险。传统上,这些梗阻大多采用手术治疗。然... 详细信息

胃出口梗阻是晚期胰腺、胃和十二指肠恶性肿瘤的一种晚期并发症。胃出口梗阻患者会出现难治性恶心、呕吐和厌食,进而可能导致电解质失衡、脱水和营养不良。此外,这些患者持续存在误吸和肺炎的风险。传统上,这些梗阻大多采用手术治疗。然而,许多患者由于初始评估时的身体状况不佳而不适合接受搭桥手术。此外,其发病率和死亡率显著较高,并与症状持续或延迟缓解和住院时间延长相关。球囊扩张术和金属支架置入已成功应用于不适合手术的患者。文章将对其适应证、禁忌证、技术、结果及争议进行综述。

关键词：胃十二指肠肿瘤梗阻自膨式金属支架

Clinicopathologic characteristics of gastric carcinoma in elderly patients: A comparison with young patients

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World Journal of Gastroenterology 2005年第1期11卷 22-26页

作者： Dong-Yi kim Jae-Kyoon Joo Seong-Yeob Ryu young-Kyu Park young-jin kim Shin-Kon kim Division of Gastroenterologic Surgery

AIM:To examine the clinicopathologic features of elderly patients with gastric carcinoma and to investigate the relationship between prognosis and ***: We reviewed the hospital records of 2 014patients with gastric carcinoma retrospectively to compare the clinicopathologic findings in elderly (age ＞70 years) and young (age ＜36 years) patients during the period from 1986 to 2000 in a tertiary referral center in Gwangju, Korea. Overall survival was the main outcome ***: Of the 2 014 patients, 194 (9.6%) were in the elderly group and 137 (6.8%) were in the young *** elderly and young patients had similar distributions with respect to depth of invasion, nodal involvement, hepatic metastasis, peritoneal dissemination, tumor stage at the initial diagnosis, and type of surgery. Synchronous multiple carcinomas were found in 14/194 (7.2%) of the elderly group and 4/137 (2.9%) of the young group (P＜0.05). Using the Borrmann classification, type Ⅳ was more frequent in the young patients than in the elderly patients (P＜0.05).Significantly more elderly patients had a well or moderately differentiated histology, and more young patients had a poorly differentiated histology and signet ring cell carcinoma (P＜0.001). The 5-year survival rates of elderly and young patients did not differ statistically (52.8% vs 46.5%,P = 0.5290). Multivariate analysis showed that the histologic type, nodal involvement and operative curability were significant prognostic factors, and age itself was not an independent prognostic factor of survival for elderly gastric carcinoma ***: Elderly patients with gastric carcinoma do not have a worse prognosis than young patients. The important prognostic factor is whether the patients undergo a curative resection.

关键词： Gastric carcinomas Prognosis Age Surgery

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World Journal of Gastroenterology 2004年第5期10卷 737-740页

作者： Dong Yi kim Jae Kyoon Joo Seong Yeob Ryu young jin kim Shin Kon kim Division of Gastroenterologic Surgery Department of SurgeryChonnam National University Medical SchoolGwangjuKorea

AIM:The prognosis of early gastric carcinoma (EGC) is generally excellent after surgery. The presence or absence of lymph node metastasis in EGC is an important prognostic factor. The survival and recurrence rates of node-negative EGC are much better than those of node-positive EGC. This study examined the factors related to lymph node metastasis in EGC to determine the appropriate treatment for ***: We investigated 748 patients with EGC who underwent surgery between January 1985 and December 1999 at the Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Hospital. Several clinicopathologic factors were investigated to analyze their relationship to lymph node metastasis: age, sex, tumor location, tumor size, gross type, histologic type, depth of invasion, extent of lymph node dissection, type of operation,and DNA ***:Lymph node metastases were found in 75 patients (10.0%). Univariate analysis showed that male sex, tumor size larger than 2.0cm, submucosal invasion of tumor, histologic differentiation, and DNA ploidy pattern were risk factors for regional lymph node metastasis in EGC patients. However, a multivariate analysis showed that three risk factors were associated with lymph node metastasis:large tumor size, undifferentiated histologic type and submucosal invasion. No statistical relationship was found for age, sex, tumor location, gross type, or DNA ploidy in multivariate analysis. The 5-year survival rate was 94.2% for those without lymph node metastasis and 87.3% for those with lymph node metastasis, and the difference was significant (P<0.05).CONCLUSION: In patients with EGC, the survival rate of patients with positive lymph nodes is significantly worse than that of patients with no lymph node metastasis. Therefore,a standard D2 lymphadenectomy should be performed in patients at high risk of lymph node metastasis: large tumor size, undifferentiated histologic type and submucosal invasion.

关键词： Stomach Neoplasms Adult Cell Differentiation Female Humans Logistic Models Lymph Node Excision Lymphatic Metastasis control Male Risk Factors Survival Rate

Deep learning acceleration of multiscale superresolution localization photoacoustic imaging

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Light(Science & Applications) 2022年第6期11卷 1166-1177页

作者： Jongbeom kim Gyuwon kim Lei Li Pengfei Zhang jin young kim Yeonggeun kim Hyung Ham Kkim Lihong V.Wang Seungchul Lee Chulhong kim Departments of Electrical Engineering Mechanical EngineeringConvergence IT Engineeringand Interdisciplinary Bioscience and BioengineeringGraduate School of Artificial IntelligenceMedical Device Innovation CenterPohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohangGyeongbuk 37673Republic of Korea Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringDepartment of Electrical EngineeringCalifornia Institute of Technology1200 E.California Blvd.MC 138-78PasadenaCA 91125USA School of Precision Instruments and Optoelectronics Engineering Tianjin University92 Weijin RoadNankai DistrictTianjin 300072China Opticho 532CHANGeUP GROUND87 Cheongam-roNam-guPohangGyeongsangbuk 37673Republic of Korea

A superresolution imaging approach that localizes very small targets,such as red blood cells or droplets of injected photoacoustic dye,has significantly improved spatial resolution in various biological and medical imaging ***,this superior spatial resolution is achieved by sacrificing temporal resolution because many raw image frames,each containing the localization target,must be superimposed to form a sufficiently sampled high-density superresolution ***,we demonstrate a computational strategy based on deep neural networks(DNNs)to reconstruct high-density superresolution images from far fewer raw image *** localization strategy can be applied for both 3D label-free localization optical-resolution photoacoustic microscopy(OR-PAM)and 2D labeled localization photoacoustic computed tomography(PACT).For the former,the required number of raw volumetric frames is reduced from tens to fewer than *** the latter,the required number of raw 2D frames is reduced by 12 ***,our proposed method has simultaneously improved temporal(via the DNN)and spatial(via the localization method)resolutions in both label-free microscopy and labeled ***-learning powered localization PA imaging can potentially provide a practical tool in preclinical and clinical studies requiring fast temporal and fine spatial resolutions.

关键词： Deep frames networks

Prognostic factors in patients with node-negative gastric carcinoma:A comparison with node-positive gastric carcinoma

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World Journal of Gastroenterology 2006年第8期12卷 1182-1186页

作者： Dong Yi kim Kyeung Won Seo Jae Kyoon Joo young Kyu Park Seong Yeob Ryu Hyeong Rok kim young jin kim Shin Kon kim Division of Gastroenterologic Surgery Department of SurgeryChonnam National University Medical SchoolGwangjuKorea

AIM： To identify the clinicopathological characteristics of lymph node-negative gastric carcinoma, and also to evaluate outcome indicators in the lymph node-negative patients.METHODS： Of 2848 gastric carcinoma patients, 1524 （53.5%） were lymph nede-negative. A statistical analysis was performed using the Cox model to estimate outcome indicators. RESULTS： There was a significant difference in the recurrence rate between lymph nede-negative and lymph node-positive patients （14.4% vs 41.0%, P〈0.001）. The 5-year survival rate was significantly lower in lymph node-positive than in lymph node-negative patients （31.1% vs 77.4%, P〈0.001）. Univariate analysis revealed that the following factors influenced the 5-year survival rate： patient age, tumor size, depth of invasion, tumor location, operative type, and tumor stage at initial diagnosis. The Cox proportional hazard regression model revealed that tumor size, serosal invasion, and curability were independent, statistically significant, prognostic indicators of lymph node-negative gastric carcinoma. CONCLUSION： Lymph node-negative patients have a favorable outcome attributable to high curability, but the patients with relatively large tumors and serosal invasion have a poor prognosis. Curability is one of the most reliable predictors of long-term survival for lymph nodenegative gastric carcinoma patients.

关键词： Gastric carcinoma Survival Tumor size Serosal invasion Curability