检索结果-南通市图书馆

Experimental Investigation of Flexible Hawkmoth-like Wings on the Wing-wake Interaction in Hovering Flight

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2018年第1期15卷 139-153页

作者： YeongGyun Ryu Jo Won Chang joon chung Dong-Ha Kim Department of Aerospace Engineering Ryerson University Toronto Ontario M5B 2K3 Canada Department of Aeronautical Science and Flight Operation Korea Aerospace University 76 Hanggongdaehak-ro Deogyang-gu Goyang-si Gyeonggi-do 10540 Republic of Korea Aerodynamics Group Korean Air R&D Center Daejeon Metropolitan City 34054 Republic of Korea

To study wing-wake interaction for various wing flexibilities, force measurements and digital particle image velocimetry were carried out on flapping hawkmoth-like wings in a water tank. Wing thickness was employed as a design variable for the wing flexi- bility distributions. Abrupt flap-down and phase delay in flexible wings influenced the behaviors of the Leading-Edge Vortex （LEV） and Trailing-Edge Vortex （TEV）, generated by the previous stroke. While the rigid wing exhibited a detached LEV at the end of the stroke, wing with specific flexibilities obtained attached LEVs. The attached LEVs induced a relatively rapid flow toward the wing surface as a result of encountering the TEV, and the flow caused a higher lift peak. On the other hand, the wings with larger wing deformations generated distinctive changes in LEV and TEV behaviors. The flap-down helped the TEV form closer to the wing surface, and it thus caused a downwash rather than wing-wake interaction. Furthermore, the most flexible wing had a newly-formed pair of LEVs above the wing during the wing reversal, thereby being not able to generate the wing-wake interaction. These results help to understand the different vortex structures generated by flexible wings during the wing reversal and the corresponding effects of wing-wake interaction.

关键词： hovering flight flexible hawkmoth wings wing-wake interaction Digital Particle Image Velocimetry (DPIV)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

韩国的现代主义或现代主义传统

流行色 2014年第6期 140-147页

作者： chung joon-MO

且说月缸远看呈圆球形,近看缸体上呈现出一定不规则形状的月缸原原本本地反映了韩国美术的传统和历史,堪称韩国美学的结晶。其釉透明呈乳白色,似有若无地展现出独特的色泽。月缸的另一特点是,观摩赏玩之外还可以用作日常生活的器皿。月... 详细信息

且说月缸远看呈圆球形,近看缸体上呈现出一定不规则形状的月缸原原本本地反映了韩国美术的传统和历史,堪称韩国美学的结晶。其釉透明呈乳白色,似有若无地展现出独特的色泽。月缸的另一特点是,观摩赏玩之外还可以用作日常生活的器皿。月缸与碟子同为19世纪朝鲜后期产量最大的生活器皿,当时百姓无论地位高低、贫富贵贱,家家户户都有一两个月缸。

关键词：现代美术单色画视觉触感绘画形式现代主义

Stable immobilization of lithium polysulfides using three-dimensional ordered mesoporous Mn2O3 as the host material in lithium-sulfur batteries

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2024年第6期6卷 99-112页

作者： Sung joon Park Yun Jeong Choi Hyun-seung Kim Min Joo Hong Hongjun Chang Janghyuk Moon Young-Jun Kim Junyoung Mun Ki Jae Kim Department of Energy Science Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea Department of Energy Engineering Konkuk UniversitySeoulRepublic of Korea Advanced Batteries Research Center Korea Electronic Technology InstituteSeongnamRepublic of Korea Department of Future Energy Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Energy Systems Engineering Chung-Ang UniversitySeoulRepublic of Korea SKKU Advanced Institute of Nanotechnology Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwonRepublic of Korea

Lithium-sulfur batteries(LSBs)have drawn significant attention owing to their high theoretical discharge capacity and energy ***,the dissolution of long-chain polysulfides into the electrolyte during the charge and discharge process(“shuttle effect”)results in fast capacity fading and inferior electrochemical *** this study,Mn_(2)O_(3)with an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cathode host for LSBs via KIT-6 hard templating,to effectively inhibit the polysulfide shuttle ***-Mn_(2)O_(3)offers numerous pores to confine sulfur and tightly anchor the dissolved polysulfides through the combined effects of strong polar-polar interactions,polysulfides,and sulfur chain *** OM-Mn_(2)O_(3)/S composite electrode delivered a discharge capacity of 561 mAh g-1 after 250 cycles at 0.5 C owing to the excellent performance of OM-Mn_(2)O_(3).Furthermore,it retained a discharge capacity of 628mA h g-1 even at a rate of 2 C,which was significantly higher than that of a pristine sulfur electrode(206mA h g-1).These findings provide a prospective strategy for designing cathode materials for high-performance LSBs.

关键词： host material lithium-sulfur battery ordered mesoporous structure shuttle effect transition-metal oxides

Characterization of focal hypermetabolic thyroid incidentaloma: An analysis with F-18 fluorodeoxyglucose positron emission tomography/computed tomography parameters

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 2022年第1期10卷 155-165页

作者： Haejun Lee Yoo Seung chung joon-Hyop Lee Ki-Young Lee Kyung-Hoon Hwang Department of Nuclear Medicine Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea Department of Endocrine Surgery Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea Department of Endocrinology and Metabolism Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea

BACKGROUND Incidentally found thyroid tumor(thyroid incidentaloma,TI)on F-18 fluorodeoxyglucose(FDG)positron emission tomography-computed tomography(PETCT)is reported in 2.5%-5%of patients being investigated for non-thyroid *** to 50%of these cases have been diagnosed to be malignant by cytological/histological ***(US)and fine-needle aspiration cytology are recommended for thyroid nodules with high FDG uptake(hypermetabolism)that are 1 cm or greater in *** is important to accurately determine whether a suspicious hypermetabolic TI is malignant or *** To distinguish malignant hypermetabolic TIs from benign disease by analyzing F-18 FDG PET-CT parameters and to identify a cut-off *** Totally,12761 images of patients who underwent F-18 FDG PET-CT for nonthyroid purposes at our hospital between January 2016 and December 2020 were retrospectively reviewed,and 339 patients[185 men(mean age:68±11.2)and 154 women(mean age:63±15.0)]were found to have abnormal,either focal or diffuse,thyroid FDG *** a thorough review of their medical records,US,and cytological/histological reports,46 eligible patients with focal hypermetabolic TI were included in this *** TIs were categorized as malignant and benign according to the cytological/histological reports,and four PET parameters[standardized uptake value(SUV)max,SUV_(peak),SUV_(mean),and metabolic tumor volume(MTV)]were measured on FDG *** lesion glycolysis(TLG)was calculated by multiplying the SUV_(mean) by *** parametric and non-parametric methods were used to compare the five parameters between malignant and benign *** operating characteristic(ROC)curve analysis was performed to identify a cut-off *** Each of the 46 patients[12 men(26.1%;mean age:62±13.1 years)and 34 women(73.9%;mean age:60±12.0 years)]with focal hypermetabolic TIs had one focal hypermetabolic *** them,26(56.5%)were malignant and 20(43.5%)were ***_(max

关键词： Thyroid incidentaloma Malignancy Fluorodeoxyglucose positron emission tomography/computed tomography Standardized uptake value Cut-off

Early extrahepatic recurrence as a pivotal factor for survival after hepatocellular carcinoma resection:A 15-year observational study

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 2022年第36期28卷 5351-5363页

作者： Jae Hyun Yoon Sung Kyu Choi Sung Bum Cho Hee joon Kim Yang Seok Ko chung Hwan Jun Department of Gastroenterology and Hepatology Chonnam National University Hospital and College of MedicineGwangju 61469South Korea Department of Gastroenterology and Hepatology Hwasun Chonnam National University Hospital and College of MedicineHwasun 58128South Korea Department of Surgery Chonnam National University Hospital and College of MedicineGwangju 61469South Korea Department of Surgery Hwasun Chonnam National University Hospital and College of MedicineHwasun 58128South Korea Department of Internal Medicine Mokpo Hankook HospitalMokpo 58643South Korea

BACKGROUND Surgical resection is one of the most widely used modalities for the treatment of hepatocellular carcinoma(HCC).Early extrahepatic recurrence(EHR)of HCC after surgical resection is considered to be closely associated with poor ***,data regarding risk factors and survival outcomes of early EHR after surgical resection remain *** To investigate the clinical features and risk factors of early EHR and elucidate its association with survival *** From January 2004 to December 2019,we enrolled treatment-naïve patients who were≥18 years and underwent surgical resection for HCC in two tertiary academic *** excluding patients with tumor types other than HCC and/or ineligible data,this retrospective study finally included 779 *** resection of HCC was performed according to the physicians’decisions and the EHR was diagnosed based on contrast-enhanced computed tomography or magnetic resonance imaging,and pathologic confirmation was performed in selected *** Cox regression analysis was performed to identify the variables associated with *** Early EHR within 2 years after surgery was diagnosed in 9.5%of patients during a median followup period of 4.4 *** recurrence-free survival period was 5.2 mo,and the median time to EHR was 8.8 mo in patients with early *** 52.7%of patients with early EHR,EHR occurred as the first recurrence of HCC after surgical *** multivariate analysis,serum albumin100 U/L,surgical margin involvement,venous and/or lymphatic involvement,satellite nodules,tumor necrosis detected by pathology,tumor size≥7 cm,and macrovascular invasion were determined as risk factors associated with early *** sub-categorizing the patients according to the number of risk factors,the rates of both EHR and survival showed a significant correlation with the risk of early ***,multivariate analysis revealed that early E

关键词： Early extrahepatic recurrence Hepatocellular carcinoma Prognosis Surgery Survival

Anti-C4d chimeric antigen receptor regulatory T cells suppressed allograft rejection in ABO-incompatible heart transplantation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2022年第1期9卷 1-4页

作者： Sun-Kyung Lee Jerome Han Honglin Piao Nara Shin joon Young Jang Ji-Jing Yan Hyori Kim Junho chung Jaeseok Yang Biomedical Research Institute Seoul National University HospitalSeoul 03080Republic of Korea Department of Medicine Graduate SchoolSeoul National University College of MedicineSeoul 03080Republic of Korea Department of Biochemistry and Molecular Biology Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Biomedical Science Seoul National University College of MedicineSeoul 03080Republic of Korea Cancer Research Institute Seoul National University College of MedicineSeoul 03080Republic of Korea Division of Nephrology Department of Internal MedicineYonsei University College of MedicineSeoul 03722Republic of Korea Convergence Medicine Research Center Asan Medical CenterSeoul 05505Republic of Korea

ABO blood group-incompatible(ABOi)transplantation has been developed to overcome the serious problem of donor organ ***,antibody-mediated rejection(ABMR)remains as the main limitation to successful ABOi *** of desensitization treatment improved the outcomes of ABOi transplantation by suppressing ABMR;however,this strong,nonspecific immunosuppression also increases infectious ***,chimeric antigen receptor regulatory T cells(CAR Tregs)were developed to improve the antigen specificity,viability,and suppressive activity of Tregs.C4d deposition is a marker of ABMR and is also found in most ABOi allograft *** on these findings,we developed anti-C4d CAR Tregs to suppress ABMR in ABOi allografts.

关键词： C4d ABO allograft

Sprayable nanomicelle hydrogels and inflammatory bowel disease patient cell chips for development of intestinal lesion-specific therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2022年第12期7卷 433-445页

作者： Hyo-Jin Yoon Songhyun Lee Tae Young Kim Seung Eun Yu Hye-Seon Kim Young Shin chung Seyong chung Suji Park Yong Cheol Shin Eun Kyung Wang Jihye Noh Hyun Jung Kim Cheol Ryong Ku Hong Koh Chang-Soo Kim joon-Sang Park Young Min Shin Hak-joon Sung Department of Medical Engineering Yonsei University College of MedicineSeoul03722Republic of Korea School of Electrical and Electronic Engineering Yonsei UniversitySeoul03722Republic of Korea Department of Obstetrics and Gynecology Institution of Women’s Life Medical ScienceSeverance HospitalYonsei University College of MedicineSeoul03722Republic of Korea Department of Biomedical Engineering The University of Texas at AustinAustinTX78712USA Department of Internal Medicine EndocrinologyInstitute of Endocrine ResearchYonsei University College of MedicineSeoul03722Republic of Korea Department of Pediatrics GastroenterologySeverance HospitalYonsei University College of MedicineSeoul03722Republic of Korea Department of Computer Engineering Hongik UniversitySeoul04066Republic of Korea Institute of Tissue Regeneration Engineering(ITREN) Dankook UniversityCheonan31116Republic of Korea Numais Co. Ltd.Korea Seoul 04799Republic of Korea

All-in-one treatments represent a paradigm shift in future *** example,inflammatory bowel disease(IBD)is mainly diagnosed by endoscopy,which could be applied for not only on-site monitoring but also the intestinal lesion-targeted spray of injectable ***,molecular conjugation to the hydrogels would program both lesion-specific adhesion and drug-free *** study validated this concept of all-in-one treatment by first utilizing a well-known injectable hydrogel that underwent efficient solution-to-gel transition and nanomicelle formation as a translatable *** properties enabled spraying of the hydrogel onto the intestinal walls during ***,peptide conjugation to the hydrogel guided endoscopic monitoring of IBD progress upon adhesive gelation with subsequent moisturization of inflammatory lesions,specifically by *** peptide was designed to mimic the major component that mediates intestinal interaction with Bacillus subtilis flagellin during IBD ***,the peptide-guided efficient adhesion of the hydrogel nanomicelles onto Toll-like receptor 5(TLR5)as the main target of flagellin binding and *** peptide binding potently suppressed inflammatory signaling without drug loading,where TLR5 and Notch-1 operated collaboratively through downstream actions of tumor necrosis *** results were produced using a human colorectal cell line,clinical IBD patient cells,gut-on-a-chip,a mouse IBD model,and pig experiments to validate the translational utility.

关键词： Nanomicelle Injectable hydrogel Peptide display Theranostic All-in-one treatment Inflammatory bowel disease

Visual quality assessment after presbyopic laser in-situ keratomileusis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2018年第3期11卷 462-469页

作者： Dong Hui Lim Eui-Sang chung Myoung joon Kim Tae-Young chung Department of Ophthalmology Samsung Medical Center Sungkyunkwan University School of Medicine Department of Preventive Medicine Graduate School the Catholic University of Korea Department of Ophthalmology University of Ulsan College of MedicineAsan Medical Center

AIM： To assess visual quality after presbyopia correction using an aspheric ablation profile and a micro-monovision protocol. METHODS： This is a retrospective interventional study. Fifty-four eyes of 27 patients （mean age, 50.2±7.5y） who underwent presbyopia correction with an aspheric micro-monovision protocol were enrolled. The values of modulation transfer function （MTF） cutoff frequency, Strehl ratio, objective scattering index （OSI） and accommodation range were quantitatively assessed using the HD analyzer. Preoperative and postoperative contrast sensitivity （CS） at far （2.5 m） and near （40 cm） distance and higher-order aberrations （HOAs） were analyzed. Subjective visual satisfaction was evaluated by self-reported questionnaire regarding optical visual symptoms. RESULTS： One year after presbyopia correction, no significant differences were found in the MTF cutoff frequency, Strehl ratio and OSI, however, the lID analyzer accommodation range significantly differed postoperatively （P=0.004）. Postoperative CS at 12 and 18 cpd at near showed statistically significant improvement （P=0.020 and 0.008, respectively）. Visual performance by self-reported questionnaire revealed satisfactory results in terms of subjective visual quality improvement. CONCLUSION： Objective optical quality parameters show good visual outcomes. Subjective visual quality assessed by self-reported questionnaire in the presbyopia correction group show satisfactory results.

关键词： presbyopia correction laser blended vision visual quality LASIK

Metabolic signaling functions of the heme oxygenase/CO system in metabolic diseases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2018年第12期15卷 1085-1087页

作者： Hyo Jeong Kim Yeonsoo Joe Young-joon Surh Hun Taeg chung Department of Biological Sciences University of UlsanUlsanSouth Korea Tumor Microenvironment Global Core Research Center Research Institute of Pharmaceutical SciencesSeoul National UniversitySeoulSouth Korea

Immunometabolism is the intersection of immunology and *** heme oxygenase(HO)-1 and carbon monoxide(CO)(HO-1/CO)system can be induced by various stresses,including infection,and its function is to relieve stresses such as oxidative and inflammatory *** we demonstrate that the HO-1/CO system is intimately involved in the beneficial modulation of metabolic pathways via the production of ATF4 through an integrative stress response.

关键词： system monoxide oxidative