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Development of a Concentration Measurement Technique for Steady State Solid-liquid Mixing using a Neural Network

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Journal of Thermal Science 2013年第5期22卷 478-483页

作者： Deog Hee Doh Joo ho yum Gyeong Rae Cho Myung ho Kim Gyong Won Ryu Masahiro Takei Division of Mechanical and Energy Systems Engineering Korea Maritime UniversityYeongdo-gu Busan Korea Graduate School Korea Maritime UniversityYeongdo-gu Busan Korea R&D Institute-5 Agency for Defense DevelopmentJochiwongil 462Yuseong Daejeon 305-152 Korea Graduate School of Mechanical Engineering Artificial Science Division Chiba UniversityJapan

A measurement technique that can measure the concentration of the solid particles in liquid flow was *** measurement system consists of a color camera and three LCD *** solid particles were put at the bottom of a cylindrical mixing tank in which JetA1 oil was *** mixing of the solid particles was performed by rotating a propeller type agitator with three different rotation speed(500,600,700 r/min).Mixing state was visualized by the LCD displays and a color *** color intensity of the glass particles changes with their *** color information was decoded into three principle colors R,G,and B so that,the calibration curve of color-to-concentration was performed using these information.A neural network was used for this *** transient concentration field of the solid particles was quantitatively visualized.

关键词： Solid particles JetA1 oil Transient mixing Neural Network Concentration

Comparison of the Bright Band Characteristics Measured by Micro Rain Radar (MRR) at a Mountain and a Coastal Site in South Korea

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Advances in Atmospheric Sciences 2009年第2期26卷 211-221页

作者： Joo-Wan CHA Ki-ho CHANG Seong Soo yum Young-Jean ChoI Department of Atmospheric Sciences Yonsei University Global Environment System Research Laboratory NIMR/KMA

Data from a long term measurement of Micro Rain Radar （MRR） at a mountain site （Daegwallyeong, DG, one year period of 2005） and a coastal site （Haenam, HN, three years 2004-2006） in South Korea were analyzed to compare the MRR measured bright band characteristics of stratiform precipitation at the two sites. On average, the bright band was somewhat thicker and the sharpness （average gradient of reflectivity above and below the reflectivity peak） was slightly weaker at DG, compared to those values at HN. The peak reflectivity itself was twice as strong and the relative location of the peak reflectivity within the bright band was higher at HN than at DG. Importantly, the variability of these values was much larger at HN than at DG. The key parameter to cause these differences is suggested to be the difference of the snow particle densities at the two sites, which is related to the degree of riming. Therefore, it is speculated that the cloud microphysical processes at HN may have varied significantly from un-rimed snow growth, producing low density snow particles, to the riming of higher density particles, while snow particle growth at DG was more consistently affected by the riming process, and therefore high density snow particles. Forced uplifting of cloudy air over the mountain area around DG might have resulted in an orographic supercooling effect that led to the enhanced riming of supercooled cloud drops.

关键词： Micro Rain Radar bright band thickness and sharpness cloud microphysical processes local characteristics

A new technique for Nd:YAG laser posterior capsulotomy

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International Journal of Ophthalmology(English edition) 2014年第2期7卷 345-349页

作者： Jung kee Min Jae Hwan An Jin ho Yim Department of Ophthalmology Ulsan University HospitalUlsan University College of Medicine 290-3 Jeonha-dongDong-gu Ulsan 682-714 Republic of Korea Samsung Eye Clinic Cheongju 361-270 Republic of Korea

AIM:To investigate the effects of a new opening pattern in neodymium:yttrium-aluminum-garnet(Nd:YAG)laser posterior capsulotomy on visual ***:This technique was conducted along a circular *** energy ranged between 0.8 and1.2 mJ/pulse was consumed and mean total energy levels were 74±21 mJ(mean±standard deviation:SD,from 40 to167)and laser shots aimed at 150μm away behind a datum point and went along an imaginary line which extends 0.5 mm inside from optic margin and into the circular en bloc *** stands were attached with fragment and then they were cut off by the laser after circular *** circular fragment was completely separated from vitreous,and then this fragment was quickly sunk in intravitreal ***:The follow-up period ranges from at least a week to 40mo,making 15.8mo on *** procedural outcome showed 96%(74 eyes out of the 77eyes)enhancement in patients’visual *** macular edema or retinal detachment was not observed in any of the patients during follow-up ***:This new technique is expected to improve the weaknesses that the conventional procedures have by adding the process to cut off vitreous stands attached with the fragment by the laser to the circular application.

关键词： cataract intraocular lens damage posterior capsular opacification vitreous strand YAG laser capsulotomy

Genotype 3 is the predominant hepatitis C genotype in a multi-ethnic Asian population in Malaysia

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Hepatobiliary & Pancreatic Diseases International 2015年第3期14卷 281-286页

作者： Shiaw-hooi ho kee-Peng Ng Harvinder Kaur Khean-Lee Goh Gastroenterology and Hepatology Unit Department of Internal MedicineUniversity of Malaya Department of Medical Microbiology University of Malaya

BACKGROUND： Genotypes of hepatitis C virus （HCV） are distributed differently across the world. There is a paucity of such data in a multi-ethnic Asian population like Malaysia. The objectives of this study were to determine the distribution of HCV genotypes between major ethnic groups and to ascer- tain their association with basic demographic variables like age and gender.

关键词： Asian genotype hepatitis C Malaysia multi-ethnic

Acute lower gastrointestinal bleeding from a dieulafoy lesion proximal to the anorectal junction post-orthotopic liver transplant

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World Journal of Gastroenterology 2006年第46期12卷 7547-7548页

作者： Wichian Apiratpracha Jin kee ho James J Powell Eric M Yoshida British Columbia Transplant Society The University of British Columbia Vancouver BC Canada Division of Gastroenterology Department of Medicine The University of British Columbia Vancouver BC Canada Department of Surgery The University of British Columbia Vancouver BC Canada

A 67-year-old woman underwent an orthotopic liver transplantation for end stage liver disease secondary to chronic autoimmune hepatitis. She developed sudden massive hematochezia on post-operative day 23 with hemodynamic compromise. The source of hemorrhage was found at colonoscopy after careful irrigation and inspection to be a dieulafoy lesion situated just proximal to the anorectal junction. Hemostasis was achieved with epinephrine injection and thermal coagulation.

关键词： Bleeding Anorectal Dieulafoy Rectum

Handover Mechanism Based on Underwater Hybrid Software-Defined Modem in Advanced Diver Networks

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Computers, Materials & Continua 2022年第3期70卷 5721-5743页

作者： K.M.Delphin Raj Sun-ho yum Jinyoung Lee Eunbi Ko Soo-Yong Shin Soo-Hyun Park Department of Financial Information Security Kookmin UniversitySeoul02707Korea Special Communication&Convergence Service Research Center Kookmin UniversitySeoul02707Korea Department of Computer Science Kookmin UniversitySeoul02707Korea

For the past few decades,the internet of underwater things(IoUT)otained a lot of attention in mobile aquatic applications such as oceanography,diver network monitoring,unmanned underwater exploration,underwater surveillance,location tracking system,*** of the IoUT applications rely on acoustic *** current IoUT applications face difficulty in delivering a reliable communication system due to the various technical limitations of IoUT environment such as low data rate,attenuation,limited bandwidth,limited battery,limited memory,connectivity problem,*** of the significant applications of IoUT include monitoring underwater diver *** order to perform a reliable and energy-efficient communication system in the underwater diver networks,a smart underwater hybrid softwaredefined modem(UHSDM)for the mobile ad-hoc network was developed that is used for selecting the best channel/medium among acoustic,visible light communication(VLC),and infrared(IR)based on the criteria established within the ***,due to the mobility of underwater divers,the developed UHSDMmeets the challenges such as connectivity errors,frequent link failure,transmission delay caused by re-routing,*** emergency,the divers are most at the risk of *** deal with diver mobility,connectivity,energy efficiency,and reducing the latency in ADN,a handover mechanism based on pre-built UHSDM is proposed in this *** paper focuses on(1)design of UHSDM for ADN(2)propose the channel selection mechanism in UHSDM for selecting the best medium for handover and(3)propose handover protocol *** implementation result shows that the proposed mechanism can be used to find the new route for divers in advance and the latency can be reduced ***,this paper shows the real field experiment of air tests and underwater tests with various *** research will contribute much to the profit of researchers in underwater diver networks and underwater net

关键词： Internet of underwater things(IoUT) underwater hybrid software-defined modem(UHSDM) advanced diver networks(ADN) channel selection mechanism(CSM) handover mechanism acoustic visible light communication(VLC) infrared(IR)

Efficient page layout analysis on small devices

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第6期10卷 800-804页

作者： Eun-jung HAN Chee-onn WONG kee-chul JUNG Kyung-ho LEE Eun-yi KIM Department of Naval Architecture and Ocean Engineering Inha University Human-Centered Interfaces Lab Department of Digital MediaSoongsil University Internet and Media Engineering Konkuk University

Previously we have designed and implemented new image browsing facilities to support effective offiine image contents on mobile devices with limited capabilities： low bandwidth, small display, and slow processing. In this letter, we fulfill the automatic production of cartoon contents fitting small-screen display, and introduce a clustering method useful for various types of cartoon images as a prerequisite stage for preserving semantic meaning. The usage of neural networks is to properly cut the various forms of pages. Texture information that is useful for grayscale image segmentation gives us a good clue for page layout analysis using the multilayer perceptron （MLP） based x-y recursive algorithm. We also automatically frame the segment MLP using agglomerative segmentation. Our experimental results show that the combined approaches yield good results of segmentation for several cartoons.

关键词： Efficient page layout analysis MLP-based segmentation Mobile devices Image segmentation Neural network

Real-world comparison of non-vitamin K antagonist oral anticoagulants and warfarin in Asian octogenarian patients with atrial fibrillation

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Journal of Geriatric Cardiology 2016年第7期13卷 566-572页

作者： Chang Hee Kwon Minsu Kim Gi-Byoung Nam kee-Joon Choi You-ho Kim Division of Cardiology Konkuk University Medical Center Konkuk University School of Medicine Seoul South Korea Division of Cardiology Asan Medical Center University of Ulsan College of Medicine Seoul South Korea

Background The efficacy and safety of non-vitamin K antagonist oral anticoagulants （NOACs） and warfarin in Asian octogenarian atrial fibrillation （AF） patients have not been established in a real-world setting. We aimed to evaluate the efficacy and safety of NOACs and warfarin in Korean octogenarian patients. Methods A total of 293 consecutive patients aged 〉 80 years with non-valvular AF who had taken either NOACs 048 cases, 50.5%） or warfarin （145 cases, 49.5%） were retrospectively reviewed. The efficacy outcome was the com- posite of stroke or systemic embolism. The safety outcome was major bleeding. Results The follow-up duration was 375 patient-years （ 172 patient-years with NOACs and 203 patient-years with warfarin）. Patients on NOACs were slightly older （P = 0.006） and had slightly higher HAS-BLED scores （P = 0.034）. The efficacy of both anticoagulants was high （1.16% for NOACs vs. 2.98% for warfarin per 100 pa- tient-years, P = 0.46）. The safety outcome was relatively high in both NOACs and warfarin groups （8.96% vs. 12.46%, P = 0.29）. The effi- cacy and safety outcomes tended to decrease non-significantly in low dose NOACs than in common dose NOACs or warfarin （0.85% vs. 1.84% vs. 2.98% in efficacy outcome, P = 0.69; and 6.97% vs. 13.29% vs. 12.46% in safety outcome, P = 0.34）. Conclusions NOACs were highly effective for prevention of stroke or systemic embolism in Asian octogenarian AF patients. however, major bleeding occurred excessively high in both anticoagulant groups. Further study is required on the optimal anticoagulant regimen in octogenarian population.

关键词： Anticoagulants Atrial fibrillation Efficacy Octogenarian Safety

Performance and genetic diversity of 23 provenances of northern red oak(Quercus rubra L.)after 25 years of growth in South Korea

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Journal of Forestry Research 2021年第5期32卷 2181-2188页

作者： Ki-Won Kim Kyoung-Mi Lee Soon-ho Kwon Ji-Min Park Yang-Gil Kim Hye-In Kang Da-Bin yum Kyu-Suk Kang Department of Agriculture Forestry and BioresourcesSeoul National UniversitySeoul 08826Republic of Korea Department of Forest Bioresources National Institute of Forest ScienceSuwon 16631Republic of Korea Department of Plant Resource Research Korea National ArboretumPocheon 11186Republic of Korea Research Institute of Agriculture and Life Sciences CALS_SNUSeoul 08826Republic of Korea

Growth traits and genetic diversity of 23 provenances of Quercus rubra introduced from North America were analyzed in a provenance trial established with a randomized block design in Hwaseong,Gyeonggi,South Korea in *** variables and survival at age 25 were compared with results from early ***,DBH,volume and stem straightness of *** was better than those of the domestic oak(Quercus accutissima).Growth of the Dunham Island provenance from New York was the best among the 23 provenances that of the Eagle River provenance from Wisconsin was *** rate at age25 was on average 52%.The longitude of seed origin and growth of provenance were consistently significantly negatively correlated at all *** of coastal provenances was superior to that of the inland provenances,which were separated by the Appalachian *** diversity and genetic distance among the provenances were evaluated using micro satellite *** allelic frequencies showed high polymorphism in 10 microsatellite loci,and 292 alleles were *** 10 loci,two were commonly found in the 23 *** mean allelic diversity and heterozygosity observed among the provenances were similar to those from the native populations of *** in North ***’s genetic distance among the 23 was estimated and showed that a clear trend between geographic and genetic distances,indicating that some provenances have high genetic diversity with superior growth performance.

关键词： Introduction breeding Provenance test Adaptation Microsatellite marker Genetic distance