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3D Face Reconstruction from a Single Image Using a Combined PCA-LPP Method

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Computers, Materials & Continua 2023年第3期74卷 6213-6227页

作者： Jee-Sic Hur Hyeong-Geun Lee Shinjin kang Yeo Chan Yoon soo Kyun Kim Department of Computer Engineering Jeju National UniversityJeju63243Korea School of Games Hongik UniversitySejong30016Korea Department of Artificial Intelligence Jeju National UniversityJeju63243Korea

In this paper, we proposed a combined PCA-LPP algorithm toimprove 3D face reconstruction performance. Principal component analysis(PCA) is commonly used to compress images and extract features. Onedisadvantage of PCA is local feature loss. To address this, various studies haveproposed combining a PCA-LPP-based algorithm with a locality preservingprojection (LPP). However, the existing PCA-LPP method is unsuitable for3D face reconstruction because it focuses on data classification and *** the existing PCA-LPP, the adjacency graph, which primarily shows the connectionrelationships between data, is composed of the e-or k-nearest neighbortechniques. By contrast, in this study, complex and detailed parts, such aswrinkles around the eyes and mouth, can be reconstructed by composing thetopology of the 3D face model as an adjacency graph and extracting localfeatures from the connection relationship between the 3D model *** verified the effectiveness of the proposed method. When theproposed method was applied to the 3D face reconstruction evaluation set,a performance improvement of 10% to 20% was observed compared with theexisting PCA-based method.

关键词： Principal component analysis locality preserving project 3DMM face reconstruction face modeling

Superior electrocatalytic negative electrode with tailored nitrogen functional group for vanadium redox flow battery

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Journal of Energy Chemistry 2023年第3期78卷 148-157,I0005页

作者： Min Gu kang Wook Ahn Joonhee kang Shin Ae Song Kiyoung Kim Ju Young Woo Yong-Cheol Jeong Bonwook Koo Dae soo Jung Sung Nam Lim Micro/Nano Scale Manufacturing Group Korea Institute of Industrial Technology143 HanggaulroSangrok-guAnsan-siGyeonggi-do 15588Republic of Korea Department of Energy Systems Engineering Soonchunhyang University22 Soonchunhyang-roShinchang-myeonAsan-siChungcheongnam-do 31538Republic of Korea Department of Nanoenergy Engineering Pusan National UniversityBusan 46241Republic of Korea Department of Nano Fusion Technology Pusan National UniversityBusan 46241Republic of Korea Energy Storage Materials Center Energy&Environmental DivisionKorea Institute of Ceramic Engineering&Technology(KICET)101 Soho-roJinju-siGyeongsangnam-doRepublic of Korea

Development of electrodes with high electrocatalytic activity and stability is essential for solving problems that still restrict the extensive application of vanadium redox flow batteries(VRFBs).Here,we designed a novel negative electrode with superior electrocatalytic activity by tailoring nitrogen functional groups,such as newly formed nitro and pyridinic-N transformed to pyridonic-N,from the prenitrogen-doped *** was experimentally confirmed that an electrode with pyridonic-N and nitro fuctional groups(tailored nitrogen-doped graphite felt,TNGF) has superior electrocatalytic acivity with enhanced electron and mass *** functional theory calulations demonstrated the pyridonic-N and nitro functional groups promoted the adsorption,charge transfer,and bond formation with the vanadium species,which is consistent with expermental *** addition,the V2+/V3+redox reaction mechanism on pyridonic-N and nitro functional groups was estabilised based on density functional theory(DFT) *** TNGF was applied to a VRFB,it enabled enhanced-electrolyte utilization and energy efficiencies(EE) of 57.9% and 64.6%,respectively,at a current density of 250 mA cm^(-2).These results are 18.6% and 8.9% higher than those of VRFB with electrode containing graphitic-N and pyridinicN ***,TNGF-based VRFB still operated with an EE of 59% at a high current density of300 mA cm^(-2).The TNGF-based VRFB exhibited stable cycling performance without noticeable decay of EE over 450 charge-discharge cycles at a current density of 250 mA cm^(-2).The results of this study suggest that introducing pyridonic-N and nitro groups on the electrode is effective for improving the electrochemical performance of VRFBs.

关键词： Tailored nitrogen functional group Pyridonic-N Nitro Negative electrode Density functional theory Vanadium redoxﬂow batteries

Estimation of Non-CO_2 GHGs Emissions by Analyzing Burn Severity in the Samcheok Fire,South Korea

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Journal of Mountain Science 2012年第6期9卷 731-741页

作者： WON myoung soo KOO Kyo Sang LEE Myung Bo LEE Woo Kyun kang Kyu-Young Division of Forest Disaster Management Korea Forest Research Institute130712 SeoulRepublic of Korea Faculty of Environmental Science and Ecological Engineering Korea University-Seoul136701 SeoulRepublic of Korea Department of Biological and Environmental Science Dongguk University-Seoul100715 SeoulRepublic of Korea

This study was performed to estimate the emission of non-CO 2 greenhouse gases(GHGs) from biomass burning at a large fire *** extended methodology adopted the IPCC Guidelines(2003) equation for use on data from the Samcheok forest fire gathered using 30 m resolution Landsat TM satellite imagery,digital forest type maps,and growing stock information per hectare by forest type in *** burn ratio(NBR) technique was employed to analyze the area and severity of the Samcheok forest fire that occurred in *** differences between NBR from pre-and post-fire datasets are examined to determine the extent and degree of change detected from *** results of burn severity analysis by dNBR of the Samcheok forest fire area revealed that a total of 16,200 ha of forest were *** proportion of the area characterized by a 'Low' burn severity(dNBR below 152) was 35%,with 'Moderate'(dNBR 153-190) and 'High'(dNBR 191-255) areas were at 33% and 32%,*** combustion efficiency for burn severity was calculated as 0.43 for crown fire where burn severity was 'High',as 0.40 for 'Moderate' severity,and 0.15 for 'Low' severity surface *** emission factors for estimating non-CO 2 GHGs were separately applied to CO 130,CH 4 9,NO x 0.7 and N 2 O ***-CO 2 GHGs emissions from biomass burning in the Samcheok forest fire area were estimated to be CO 44.100,CH 4 3.053,NO x 0.238 and N 2 O 0.038 Gg.

关键词：温室气体排放严重程度 CO2 烧伤 Landsat DNBR 面积估计生物质燃烧

Massive hemothorax following internal jugular vein catheterization under ultrasound guidance:A case report

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World Journal of Clinical Cases 2022年第17期10卷 5776-5782页

作者： Hyun kang soo Young Cho Eun Ha Suk Wan Ju Joon Yong Choi Department of Anesthesiology and Pain Medicine Kwangju Christian HospitalGwangju 61661South Korea

BACKGROUND Hemothorax is a rare but life-threatening complication of central venous *** reports suggest that ultrasound guidance may reduce complications however,it does not guarantee safety CASE SUMMARY A 75-year-old male patient was admitted for laparoscopic radical *** ultrasound guidance,right internal jugular vein catheterization was successfully achieved after failure to aspirate blood from the catheter in the first *** hypotension developed after surgical positioning and persisted until the end of the operation,lasting for about 4 *** the recovery room,a massive hemothorax was identified on chest radiography and computed *** patient recovered following chest tube drainage of 1.6 L *** Hemothorax must be suspected when unexplained hemodynamic instability develops after central venous catheterization despite ultrasound *** the proper use of ultrasound is important.

关键词： Central venous catheterization Hemothorax Ultrasound guidance Internal jugular vein Case report

Fabrication of High-Density Out-of-Plane Microneedle Arrays with Various Heights and Diverse Cross-Sectional Shapes

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Nano-Micro Letters 2022年第2期14卷 60-78页

作者： Hyeonhee Roh Young Jun Yoon Jin soo Park Dong-Hyun kang Seung Min Kwak Byung Chul Lee Maesoon Im Brain Science Institute Korea Institute of Science and Technology(KIST)Seoul 02792South Korea Division of Electrical Engineering College of EngineeringKorea UniversitySeoul 02841South Korea Micro/Nano Fabrication Center KISTSeoul 02792South Korea Division of Bio‑Medical Science&Technology KIST SchoolUniversity of Science&Technology(UST)Seoul 02792South Korea

Out-of-plane microneedle structures are widely used in various applications such as transcutaneous drug delivery and neural signal recording for brain machine *** work presents a novel but simple method to fabricate high-density silicon(Si)microneedle arrays with various heights and diverse cross-sectional shapes depending on photomask pattern *** proposed fabrication method is composed of a single photolithography and two subsequent deep reactive ion etching(DRIE)***,a photoresist layer was patterned on a Si substrate to define areas to be etched,which will eventually determine the final location and shape of each individual ***,the 1st DRIE step created deep trenches with a highly anisotropic etching of the Si ***,the photoresist was removed for more isotropic etching;the 2nd DRIE isolated and sharpened microneedles from the predefined trench *** on diverse photomask designs,the 2nd DRIE formed arrays of microneedles that have various height distributions,as well as diverse cross-sectional shapes across the *** these simple steps,high-aspect ratio microneedles were created in the high density of up to 625 microneedles mm^(-2)on a Si *** tests showed a small force as low as~172μN/microneedle is required for microneedle arrays to penetrate the dura mater of a mouse *** demonstrate a feasibility of drug delivery application,we also implemented silk microneedle arrays using molding *** fabrication method of the present study is expected to be broadly applicable to create microneedle structures for drug delivery,neuroprosthetic devices,and so on.

关键词： Microneedle Various heights Cross-sectional shapes Isotropic etch Deep reactive ion etching

Beauty of the beast: anticholinergic tropane alkaloids in therapeutics

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Natural Products and Bioprospecting 2022年第1期12卷 515-529页

作者： Kyu Hwan Shim Min Ju kang Niti Sharma Seong soo A.An Bionano Research Institute Gachon University1342 Seongnam-daeroSujeong-GuSeongnam 461-701South Korea Department of Neurology Veterans Health Service Medical CenterVeterans Medical Research InstituteSeoulSouth Korea

Tropane alkaloids(TAs)are among the most valued chemical compounds known since pre-historic *** plants from Solanaceae family(Hyoscyamus niger,Datura,Atropa belladonna,Scopolia lurida,Mandragora officinarum,Duboisia)and Erythroxylaceae(Erythroxylum coca)are rich sources of tropane *** compounds possess the anticholinergic properties as they could block the neurotransmitter acetylcholine action in the central and peripheral nervous system by binding at either muscarinic and/or nicotinic ***,they are of great clinical impor-tance and are used as antiemetics,anesthetics,antispasmodics,bronchodilator and *** also serve as the lead compounds to generate more effective *** to the important pharmacological action they are listed in the WHO list of essential medicines and are available in market with FDA ***,being anticholinergic in action,TA medication are under the suspicion of causing dementia and cognitive decline like other medications with anticholinergic action,interestingly which is *** are published reviews on chemistry,biosynthesis,phar-macology,safety concerns,biotechnological aspects of TAs but the detailed information on anticholinergic mecha-nism of action,clinical pharmacology,FDA approval and anticholinergic burden is *** the present review tries to fill this lacuna by critically summarizing and discussing the above mentioned aspects.

关键词： Tropane alkaloids Poisonous plants Anticholinergic action Muscarinic and nicotinic receptors Therapeutics Anticholinergic burden

Effect of lifestyle modification on hepatocellular carcinoma incidence and mortality among patients with chronic hepatitis B

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World Journal of Gastroenterology 2023年第24期29卷 3843-3854页

作者： Yewan Park Danbee kang Dong Hyun Sinn Hyunsoo Kim Yun soo Hong Juhee Cho Geum-Youn Gwak Department of Internal Medicine Kyung Hee University HospitalSeoul 02447South Korea Department of Digital Health SAIHSTSungkyunkwan UniversitySeoul 06355South Korea Department of Clinical Research Design and Evaluation SAIHSTSungkyunkwan UniversitySeoul 06355South Korea Center for Clinical Epidemiology Samsung Medical CenterSungkyunkwan UniversitySeoul 06351South Korea Department of Medicine Samsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea Departments of Epidemiology and Medicine and Welch Center for PreventionEpidemiology and Clinical ResearchJohns Hopkins Medical InstitutionsBaltimoreMD 21287United States

BACKGROUND Research exploring the influence of healthier lifestyle modification(LSM)on the risk of hepatocellular carcinoma(HCC)in patients with chronic hepatitis B(CHB)is *** To emulate a target trial to determine the effect of LSM on HCC incidence and mortality among patients with CHB by large-scale population-based observational *** Among the patients with CHB enrolled in the Korean National Health Insurance Service between January 1,2009,and December 31,2017,those aged≥20 years who drank alcohol,smoked cigarettes,and were sedentary were *** included at least one LSM,including alcohol abstinence,smoking cessation,and regular *** primary outcome was HCC development,and the secondary outcome was liver-related *** used 2:1 propensity score matching to account for *** With 48766 patients in the LSM group and 103560 in the control group,the adjusted hazard ratio(HR)for incident HCC and liver-related mortality was 0.92[95%confidence interval(CI):0.87-0.96]and 0.92(95%CI:0.86-0.99)in the LSM group,respectively,compared with the control *** the LSM group,the adjusted HR(95%CI)for incident HCC was 0.84(0.76-0.94),0.87(0.81-0.94),and 1.08(1.00-1.16)for alcohol abstinence,smoking cessation,and regular exercise,*** adjusted HR(95%CI)for liver-related mortality was 0.92(0.80-1.06),0.81(0.72-0.91),and 1.15(1.04-1.27)for alcohol abstinence,smoking cessation,and regular exercise,*** LSM lowered the risk of HCC and mortality in patients with ***,active LSM,particularly alcohol abstinence and smoking cessation,should be encouraged in patients with CHB.

关键词： Lifestyle modification Chronic hepatitis B Hepatocellular carcinoma Cancer Mortality

Reconfigurable generation of optical vortices based on forward stimulated intermodal Brillouin scattering in subwavelength-hole photonic waveguides

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Photonics Research 2019年第7期7卷 69-76页

作者： DAE SEOK HAN MYEONG soo kang Department of Physics Korea Advanced Institute of Science and Technology(KAIST)

An all-optically reconfigurable generation of optical vortices would be highly beneficial to the implementation of next-generation optical communication and advanced information processing. The previously demonstrated approaches based on the parametric nonlinear optical processes, however, have exhibited limited conversion efficiency due to the group velocity mismatch and nonlinear phase shifts, and require the cumbersome preparation of either the optical element or initial seed beam having a non-zero topological charge. Here, we propose and analyze a novel scheme for highly efficient all-optical generation and control of optical vortices based on the dynamic acoustic vortex grating created by forward stimulated intermodal Brillouin scattering in a subwavelength-hole photonic waveguide. The dual-frequency pump beams in two different hybrid optical modes drive an acoustic vortex mode, which transforms a signal in the fundamental optical mode into an optical vortex mode. This scheme not only eliminates the need for the initial preparation of an angular-momentum-carrying medium or an optical vortex seed but also guarantees high modal purity and nearly 100% conversion efficiency assisted by the energymomentum conservation. We also investigate the feasibility and practicability of the subwavelength-hole waveguides by examining the intermodal conversion efficiency and robustness of guidance of the optical vortices,taking into account the impact of the Kerr-type nonlinear effects on the intermodal Brillouin interactions based on our rigorous full-vectorial analytical theory.

关键词： Reconfigurable generation waveguides effects

Crown Fuel Characteristics and Carbon Emission from Japanese Red Pine Stands Burned by Crown Fire in Mt. Palgong, South Korea

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Journal of Mountain Science 2012年第5期9卷 656-664页

作者： Byungdoo LEE myoung soo WON Yohan LEE Myung Bo LEE Division of Forest Disaster Management Korea Forest Research Institute College of Forestry Oregon State University

Carbon emissions from forest fires are considered an important factor of ecosystem carbon balance and global climate change. Carbon emissions from Japanese red pine stands (Pinus densiflora S. et Z.) burned by crown fire were estimated at Mt. Palgong in Daegu Metropolitan City, and crown fuel characteristics, including crown bulk density, crown base height, and fuel moisture content of Japanese red pine, were analyzed. Total biomass combusted was calculated by subtracting the biomass of burned stands from that of unburned stands exhibiting similar stand structures and site environments. Ten trees in the unburned area and five trees in the burned area were cut by using direct harvesting techniques to estimate crown layer biomass. All biomass sampled was oven-dried and weighed. The dry weight ratios of stems, branches, and needles were 70%, 21%, and 9%, respectively. The available fuel load susceptible to combustion during the crown fire spread was equivalent to 55% of the crown layer biomass. The crown bulk density was 0.24 kg/ m 3 on average. The estimated amount of CO 2 was 23,454 kg CO 2 /ha for the crown layer. These results will be useful for calculating the amount of CO 2 emitted from forest fires and for developing a forest carbon model in P. densiflora forests.

关键词：碳排放量燃料特性树冠火烧毁 CO2排放量森林火灾燃烧计算杉树