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Behavior of CaO and Calcium in pure Magnesium

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Rare Metals 2006年第Z2期25卷 150-154页

作者： HA Seong-ho LEE Jin-Kyu JO Hyung-ho jung Seung-Boo KIM Shae K. Department of Advanced Material Engineering Sungkyunkwan University 300 Chunchun-dong Jangan-gu Suwon Gyunggi-do 440-746 KoreaAdvanced Material Division Korea Institute of Industrial Technology 7-47 Songdo-dong Yeonsu-gu Incheon 406-840 Korea Advanced Material Division Korea Institute of Industrial Technology 7-47 Songdo-dong Yeonsu-gu Incheon 406-840 Korea Department of Advanced Material Engineering Sungkyunkwan University 300 Chunchun-dong Jangan-gu Suwon Gyunggi-do 440-746 Korea

Mg alloys exhibit a number of good properties such as low density, good castability and high specific strength. however, molten Mg and Mg alloys are ignited without the melt protective gases during melting and casting process due to their high reactivity. The purpose of this study is to investigate effects of Ca and CaO on pure Mg through microstructure observation, ignition test and phase analysis. With increasing Ca and CaO contents, the ignition resistance of Ca or CaO added pure Mg is increased and the grains are refined. As results of XRD and EDS, CaO is reduced to Ca in CaO added pure Mg. Mg2Ca phase is formed even in 0.1 wt.%CaO added pure Mg by reduction mechanism, while Mg2Ca phase is formed over 1.35 wt.% Ca added pure Mg.

关键词： Mg CaO ignition resistance Mg2Ca phase

Optimal Age Replacement Policy with Replacement Occurrence While the Warranty is in Effect

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Journal of Shanghai Jiaotong university(Science) 2015年第3期20卷 374-379页

作者： PARK Minjae jung Ki Mun PARK Dong ho College of Business Administration Hongik University Department of Informational Statistics Kyungsung University Industry Academic Cooperation Foundation Hallym University

This study considers an age replacement policy(ARP) for a repairable product with an increasing failure rate with and without a product warranty. As for the warranty policy to consider in association with such an age replacement policy, we adapt a renewable minimal repair-replacement warrant(MRRW) policy with 2D factors of failure time of the product and its corresponding repair time. The expected cost rate during the life cycle of the product is utilized as a criterion to find the optimal policies for both with and without the product warranty. We determine the optimal replacement age that minimizes the objective function which evaluates the expected cost rate during the product cycle and investigate the impact of several factors on the optimal replacement age. The main objective of this study lies on the generalization of the classical age replacement policy to the situation where a renewable warranty depending on 2D factors is in effect. We present some interesting observations regarding the effect of relevant factors based on numerical analysis.

关键词： age replacement policy(ARP) expected cost rate failure times renewable minimal repairreplacement warranty(MRRW) warranty servicing times

Learning curve of laparoscopy-assisted distal gastrectomy with systemic lymphadenectomy for early gastric cancer

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World Journal of Gastroenterology 2005年第47期11卷 7508-7511页

作者： Min-Chan Kim Ghap-Joong jung Hyung-ho Kim Ghap-Joong jung Department of SurgeryDong-A University College of MedicineBusanKorea Department of Surgery Seoul National University Bundang HospitalGyeonggi-doKorea

AIM: To evaluate the nature of the 'learning curve' for laparoscopy-assisted distal gastrectomy (LADG) with systemic lymphadenectomy for early gastric cancer. METhoDS: The data of 90 consecutive patients with early gastric cancer who underwent LADG with systemic lymphadenectomy between April 2003 and November 2004 were reviewed. The 90 patients were divided into 9 sequential groups of 10 cases in each group and the average operative time of these 9 groups were determined. Other learning indicators, such as transfusion requirements, conversion rates to open surgery, postoperative complication, time to first flatus, and postoperative hospital stay, were evaluated. RESULTS: After the first 10 LADGs, the operative time reached its first plateau (230-240 min/operation) and then reached a second plateau (＜200 min/operation) for the final 30 cases. Although a significant improvement in the operative time was noted after the first 50 cases, there were no significant differences in transfusion requirements, conversion rates to open surgery, postoperative complications, time to first flatus, or postoperative hospital stay between the groups. CONCLUSION: Based on operative time analysis, this study show that experience of 50 cases of LADG with systemic lymphadenectomy for early gastric cancer is required to achieve optimum proficiency.

关键词： Laparoscopic gastrectomy, Systemic lymphadenectomy Learning curve

Acute esophageal obstruction after ingestion of psyllium seed husk powder:A case report

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World Journal of Clinical Cases 2022年第7期10卷 2336-2340页

作者： Sujeong Shin jung ho Kim You ho Mun Han Sol Chung Department of Emergency Medicine Yeungnam University School of Medicine and College of MedicineDaegu 42415South Korea

BACKGROUND Bezoar is a mass of hardened external material found in the gastrointestinal(GI)*** may form anywhere in the GI tract,but esophageal bezoar is rare because of the short esophageal transit *** seed husk is an indigestible natural derivative that is widely used as an herbal ***,we report a case of acute esophageal obstruction caused by a bezoar after ingestion of psyllium seed husk *** SUMMARY A 76-year-old male with Parkinson’s disease visited the emergency department with swallowing difficulty approximately 10 h after ingesting psyllium seed husk *** began a few hours after ingestion and progressed to severe *** were no abnormal findings on simple ***,a computed tomography scan revealed an approximately 2.0 cm×2.5 cm mass located near the gastro-esophageal *** grinding,the mass was removed using an endoscopic capture *** bezoars may cause life-threatening *** with Parkinson’s disease may have esophageal motility dysfunction,which may increase esophageal transit *** our patient had Parkinson’s disease,this effect may have contributed to the formation of the *** Attention should be paid to using bulk-laxatives,and an appropriate specified regimen will be needed when marketed as a dietary supplement.

关键词： Bezoar Esophagus Obstruction Parkinson’s disease Psyllium Case report

Process simulation and economic analysis of reactor systems for perfluorinated compounds abatement without HF effluent

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Frontiers of Chemical Science and Engineering 2016年第4期10卷 526-533页

作者： Boreum Lee sunggeun Lee ho Young jung Shin-Kun Ryi Hankwon Lim Department of Advanced Materials and Chemical Engineering Catholic University of Daegu Gyeongbuk 38430 Korea Department of Environment and Energy Engineering C-honnam National University-Gwangju 61186 Korea Korea Institute of Energy Research Daejeon 34129 Korea

New and efficient proposed to treat perfluorinated reactor systems were compounds via catalytic decomposition. One system has a single reactor （S-1）, and another has a series of reactors （S-2）. Both systems are capable of producing a valuable CaF2 and eliminating toxic HF effluent and their feasibility was studied at various temperatures with a commercial process simulator, Aspen HYSYS. They are better than the conventional system, and S-2 is better than S-1 in terms of CaF2 production, a required heat for the system, natural gas usage and CO2 emissions in a boiler, and energy consumption. Based on process simulation results, preliminary economic analysis shows that cost savings of 12.37% and 13.55% were obtained in S-2 at 589.6 and 621.4℃compared to S-1 at 700 and 750 ℃, respectively, for the same amount of CaF2 production.

关键词： perfluorinated compounds (PFCs) CF4 pro-cess simulation economic analysis

An effective communication and computation model based on a hybridgraph-deeplearning approach for SIoT

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Digital Communications and Networks 2022年第6期8卷 900-910页

作者： M.S.Mekala Gautam Srivastava Ju H.Park ho-Youl jung Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38544South Korea RLRC LAb for Autonomous Vehicle Parts and Materials Innovation Yeungnam UniversityGyeongsan38544South Korea Department of Math and Computer Science Brandon UniversityBrandonCanada Department of Electrical Engineering Yeungnam UniversityGyeongsanSouth Korea Research Centre for Interneural Computing China Medical UniversityTaichungTaiwanChina

Social Edge Service(SES)is an emerging mechanism in the Social Internet of Things(SIoT)orchestration for effective user-centric reliable communication and *** services are affected by active and/or passive attacks such as replay attacks,message tampering because of sharing the same spectrum,as well as inadequate trust measurement methods among intelligent devices(roadside units,mobile edge devices,servers)during computing and *** issues lead to computation and communication overhead of servers and computation *** address this issue,we propose the HybridgrAph-Deep-learning(HAD)approach in two stages for secure communication and ***,the Adaptive Trust Weight(ATW)model with relation-based feedback fusion analysis to estimate the fitness-priority of every node based on directed graph theory to detect malicious nodes and reduce computation and communication ***,a Quotient User-centric Coeval-Learning(QUCL)mechanism to formulate secure channel selection,and Nash equilibrium method for optimizing the communication to share data over edge *** simulation results confirm that our proposed approach has achieved effective communication and computation performance,and enhanced Social Edge Services(SES)reliability than state-of-the-art approaches.

关键词： Edge computing Adaptive trust weight(ATW)model Quotient user-centric coeval-learning(QUCL)mechanism Deep learning Service reliability

Acute liver injury induces expression of FGF23 in hepatocytes via orphan nuclear receptor ERRγ signaling

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Genes & Diseases 2023年第3期10卷 679-682页

作者： Yoon Seok jung Yong-hoon Kim Kamalakannan Radhakrishnan jung-Ran Noh jung Hyeon Choi Hyo-Jin Kim Jae-ho Jeong Steven Dooley Chul-ho Lee Hueng-Sik Choi School of Biological Sciences and Technology Chonnam National UniversityGwangju 61186Republic of Korea Laboratory Animal Resource Center Korea Research Institute of Bioscience and Biotechnology125 Gwahak-roYuseong-guDaejeon 34141Republic of Korea Department of Functional Genomics KRIBB School of BioscienceKorea University of Science and Technology(UST)Daejeon 34113Republic of Korea Combinatorial Tumor Immunotherapy MRC Chonnam National University Medical SchoolHwasun-gunJeonnam 58128Republic of Korea Department of Microbiology Chonnam National University Medical SchoolGwangju 61186Republic of Korea Molecular Hepatology Section Medical Faculty MannheimHeidelberg University69117 HeidelbergGermany

Fibroblast growth factor 23(FGF23)is an osteocyte-and osteoblast-derived hormone that primarily regulates phosphate and vitamin D *** FGF23 levels are abnormally increased in pathological conditions like acute or chronic kidney injury,resulting in disease progression as well as increased rates of morbidity and mortality.^(1) however,FGF23 production in acute liver injury is not fully *** this study.

关键词： FGF23 acute vitamin

Interesting Dynamic Contrast-Enhanced Magnetic Resonance Imaging Findings of Metaplastic Breast Carcinoma with Skeletal Muscle Metastasis

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Chinese Medical Journal 2018年第7期131卷 881-882页

作者： Sin Ae Choi Eun jung Choi ho sung Park Department of Radiology Research Institute of Clinical Medicine of Chonbuk National University Biomedical Research Institute of Chonbuk National University Hospital Chonbuk National University Medical School Jeonju 561-712 Korea Department of Pathology Research Institute of Clinical Medicine of Chonbuk National University Biomedical Research Institute of Chonbuk National University Hospital Chonbuk National University Medical School Jeonju 561-712 Korea

To the Editor： A 76-year-old woman presented with palpable masses in her right breast and right forearm. Physical examination revealed a 5-cm-sized mass in the lower outer quadrant of the right breast and a hard, fixed mass, measuring 4 cm in the right forearm. Mammography revealed a round, obscured, hyperdense mass without microcalcifications.

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Auto-reactive B cells in MuSK myasthenia gravis

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Neuroimmunology and Neuroinflammation 2016年第1期3卷 196-197页

作者： Yoon-ho hong jung-Joon sung Department of Neurology Seoul National University College of MedicineSeoul Boramae Medical CenterSeoul 07061South Korea Department of Neurology Seoul National University College of MedicineSeoul National University HospitalSeoul 03080South Korea

On[Guptill JT,Yi JS,Sanders DB,Guidon AC,Juel VC,Massey JM,howard JF Jr,Scuderi F,Bartoccioni E,Evoli A,Weinhold *** of B cells in muscle-specific kinase antibody myasthenia *** Neuroimmunol Neuroinflamm 2015;2:e77]Acquired myasthenia gravis(MG)is a protoypical autoimmune disease caused by a dysfunction of neuromuscular transmission at the postsynaptic *** experience fluctuating muscle weakness that increases with *** is typically classified into clinical subtypes depending on distribution of involved muscles,onset age,thymic pathology,and auto-antibodies.

关键词： gravis myasthenia Neurol