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Synthesis and electrochemical performance of (100-x)Li7P3S11-xLi2OHBr composite solid electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2020年第8期29卷 307-316,I0011页

作者： Su-yeon Jung Rajesh Rajagopal Kwang-sun Ryu Department of Chemistry University of UlsanDoowang-dongNam-gu 44776UlsanSouth Korea

Li7P3S11solid electrolytes with high lithium-ion conductivity are promising candidates for use in all-solidstate lithium ***,this electrolyte’s poor interfacial compatibility with lithium electrodes causes unstable *** this study,in order to address this problem,(100-x)Li7P3S11-xLi2OHBr(x=0,2,5,10,20,30,40,and 50)electrolytes are prepared by a high energy ball-milling technique and heat-treatment *** resulting(100-x)Li7P3S11-xLi2OHBr(x=2,5,10,20,30,40,and 50)electrolytes provide improved electrochemical performance with good cycling stability and a wide electrochemical window of up to 10 V(***/Li+).Moreover,these electrolytes have high ionic conductivity of 10-4–10-5S/cm at room ***,the 90Li7P3S11-10Li2OHBr electrolyte displays the highest conductivity of 4.4×10-4S/cm at room temperature as well as improved ***,90Li7P3S11-10Li2OHBr shows decreased interfacial resistance between the solid electrolyte and cathode electrode,which was revealed by Electrochemical Impedance Spectroscopy(EIS)*** initial discharge capacity of 90Li7P3S11-10Li2OHBr was found to be 135 m Ah/g when used in a In|solid electrolyte|Li(Ni0.6Co0.2Mn0.2)O2 all-solid-state lithium battery(ASSLB).Thus,we can conclude the addition of Li2OHBr into the Li7P3S11results in enhanced electrochemical properties.

关键词： All-solid-state lithium battery Solid electrolyte Solid sulfide electrolyte Li2OHBr Antiperovskite

Microbiology and risk factors for gram-positive Cocci bacteremia in biliary infections

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Hepatobiliary & Pancreatic Diseases International 2020年第5期19卷 461-466页

作者： Ik Hyun Jo yeon-Ji Kim Woo Chul Chung Jaeyoung Kim Seonhoo Kim Eun sun Lim Honggeun ahn Seong Yul Ryu Division of Gastroenterology Department of Internal MedicineSt.Vincent’s HospitalCollege of MedicineThe Catholic University of KoreaSuwon 16247Korea

Background:The rapid antibiotics treatment targeted to a specific pathogen can improve clinical outcomes of *** aimed to evaluate the clinical characteristics and outcomes of biliary septicemia caused by cholangitis or cholecystitis according to causative ***:We performed a retrospective cohort study in 151 patients diagnosed with cholangitis or cholecystitis with bacterial septicemia from January 2013 to December *** patients showed clinical evidence of biliary tract infection and had blood isolates that demonstrated ***:Gram-negative,gram-positive,and both types of bacteria caused 84.1%(127/151),13.2%(20/151),and 2.6%(4/151)episodes of septicemia,*** most common infecting organisms were Escherichia coli among gram-negative bacteria and Enterococcus species(Enterococcus casseliflavus and Enterococcus faecalis)among gram-positive *** were no differences in mortality,re-admission rate,and need for emergency decompression procedures between the gram-positive and gram-negative septicemia *** univariate analysis,previous gastrectomy history was associated with gram-positive *** analysis also showed that previous gastrectomy history was strongly associated with gram-positive septicemia(Odds ratio=5.47,95%CI:1.19–25.23;P=0.029).Conclusions:Previous gastrectomy history was related to biliary septicemia induced by gram-positive *** information would aid the choice of empirical antibiotics.

关键词： Cholangitis Cholecystitis Septicemia Gram-positive bacterial infections

Comparison of Missing Data Imputation Methods in Time Series Forecasting

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Computers, Materials & Continua 2022年第1期70卷 767-779页

作者： Hyun ahn Kyunghee sun Kwanghoon Pio Kim Division of Software Convergence Hanshin UniversityGyeonggi18101Korea Contents Convergence Software Research Institute Kyonggi UniversityGyeonggi16227Korea Division of AI Computer Science and Engineering Kyonggi UniversityGyeonggi16227Korea

Time series forecasting has become an important aspect of data analysis and has many real-world ***,undesirable missing values are often encountered,which may adversely affect many forecasting *** this study,we evaluate and compare the effects of imputationmethods for estimating missing values in a time *** approach does not include a simulation to generate pseudo-missing data,but instead perform imputation on actual missing data and measure the performance of the forecasting model created *** an experiment,therefore,several time series forecasting models are trained using different training datasets prepared using each imputation ***,the performance of the imputation methods is evaluated by comparing the accuracy of the forecasting *** results obtained from a total of four experimental cases show that the k-nearest neighbor technique is the most effective in reconstructing missing data and contributes positively to time series forecasting compared with other imputation methods.

关键词： Missing data imputation method time series forecasting LSTM

Severe prelenticular membrane formation on the surface of a hydrophilic acrylic intraocular lens after cataract surgery in an eye with an Ahmed valve implant

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International Journal of Ophthalmology(English edition) 2015年第2期8卷 430-432页

作者： Yong-sun ahn Jin A Choi Department of Ophthalmology St. Vincent Hospital The College of Medicine Catholic University of Korea

Dear Sir,Iam Yong-sun ahn,from the Department of Ophthalmology of *** Hospital of Suwon,Kyungki-do,South *** are a common problem in eyes with a glaucoma drainage device(GDD),because tube shunt surgery increases the incidence and progression of cataracts[1].An Ahmed valve,the most commonly inserted GDD,is composed of a silicone tube connected to a flat plate sewn to the sclera,and aqueous humor flows from the

关键词： IOL Severe prelenticular membrane formation on the surface of a hydrophilic acrylic intraocular lens after cataract surgery in an eye with an Ahmed valve implant body Figure

Alopecia treatment using minimally manipulated human umbilical cord-derived mesenchymal stem cells:Three case reports and review of literature

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World Journal of Clinical Cases 2021年第15期9卷 3741-3751页

作者： Hyunjun ahn Sang yeon Lee Won Ju Jung Kye-Ho Lee bio Beauty&Health Company(bBHC)-Stem Cell Treatment&Research Institute(STRI) Seoul 04420South Korea Department of Functional Genomics University of Science and Technology KRIBB SchoolDeajeon 34113South Korea 97.7 Beauty&Health(B&H)Clinics Seoul 04420South Korea

BACKGROUND Alopecia areata(AA)is a common autoimmune disease characterized by hair *** appears in extensive forms,such as progressive and diffusing hair loss(diffuse AA),a total loss of scalp hair(alopecia totalis),and complete loss of hair over the entire body(alopecia universalis).Recently,mesenchymal stem cells(MSCs)have been identified as a therapeutic alternative for autoimmune *** this reason,preclinical and case studies of AA and related diseases using MSCs have been *** SUMMARY Case 1:A 55-year-old woman suffered from AA in two areas of the *** was given 15 rounds of minimally manipulated umbilical cord-MSCs(MM-UC-MSCs)over 6 *** AA gradually improved 3 mo after the first *** patient was cured,and AA did not *** 2:A 30-year-old woman,with history of local steroid hormone injections,suffered from AA in one area on the *** was given two rounds of MM-UC-MSCs over 1 *** AA immediately improved after the first *** patient was cured,and AA did not *** 3:A 20-year-old woman,who was diagnosed with alopecia universalis at the age of 12,was given 14 rounds of MM-UC-MSCs over 12 *** hair began to grow about 3 mo after the first *** patient was cured,and alopecia universalis did not *** MM-UC-MSC transplantation potentially treats patients who suffer from AA and related diseases.

关键词： Alopecia areata Umbilical cord-derived mesenchymal stem cells Allogenic Cell therapy Minimal manipulation Case report

Treatment of syringomyelia using uncultured umbilical cord mesenchymal stem cells: A case report and review of literature

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World Journal of Stem Cells 2022年第4期14卷 303-309页

作者： Hyunjun ahn Sang yeon Lee Won-Ju Jung Kye-Ho Lee Stem Cell Treatment and Research Institute(STRI) bio Beauty and Health Company(bBHC)Seoul 04420South Korea Stem Cell Treatment 97.7 Beauty and Health ClinicSeoul 04420South Korea

BACKGROUND Syringomyelia is a disease caused by the formation of a cavity inside the spinal cord and is accompanied by such symptoms as pain,paresthesia,and urination and defecation disorders,and in severe cases causes various ***,there are only surgical methods for the treatment of syringomyelia,but these methods carry the possibility of failure,recurrence,and side *** SUMMARY The patient was a 59-year-old woman who suffered from pain due to *** treatment,the patient received transplant of uncultured umbilical cord-derived mesenchymal stem *** intended,the patient's pain was relieved after ***,an additional benefit was found in that the size of the cavity also *** 2 years from the last treatment,the patient's cavity had almost completely disappeared and her syringomyelia was deemed *** Using uncultured umbilical cord-derived mesenchymal stem cells may be a new treatment alternative for syringomyelia.

关键词： Syringomyelia Umbilical cord mesenchymal stem cells Cell therapy Allogenic stem cells Chiari malformations Case report

Treatment of acute ischemic stroke by minimally manipulated umbilical cord-derived mesenchymal stem cells transplantation:A case report

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World Journal of Stem Cells 2021年第8期13卷 1151-1159页

作者： Hyunjun ahn Sang yeon Lee Won Ju Jung Kye-Ho Lee bio Beauty&Health Company(bBHC)-Stem Cell Treatment&Research Institute(STRI) Seoul 04420South Korea 97.7 Beauty&Health(B&H)Clinics Seoul 04420South Korea

BACKGROUND Stroke is one of the major causes of disability and death *** treatments for stroke exist,but existing treatment methods have limitations such as difficulty in the regeneration of damaged neuronal cells of the ***,mesenchymal stem cells(MSCs)have been studied as a therapeutic alternative for stroke,and various preclinical and case studies have been *** SUMMARY A 55-year-old man suffered an acute stroke,causing paralysis in the left upper and lower *** intravenously transplanted the minimally manipulated human umbilical cord-derived MSCs(MM-UC-MSCs)twice with an 8-d *** 65 wk after transplantation,the patient returned to his previous occupation as a veterinarian with no adverse *** MM-UC-MSCs transplantation potentially treats patients who suffer from acute ischemic stroke.

关键词： Acute ischemic stroke Behavioral disorder Umbilical cord-derived mesenchymal stem cells Allogenic Cell therapy Minimal manipulation Case report

Endoscopic resection of co-existing severe dysplasia and a small esophageal leiomyoma

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World Journal of Gastroenterology 2013年第1期19卷 137-140页

作者： sun Young ahn Seong Woo Jeon Division of Gastroenterology and Hepatology Department of Internal MedicineKyungpook National University HospitalDaegu 700-721South Korea

Leiomyoma is the most common benign mesenchymal tumor of the esophagus.A small leiomyoma covered with endoscopically normal mucosa has a characteristic endoscopic ultrasonographic appearance,slow growth rate,and negligible risk of malignant transformation;therefore the histology does not need to be *** tumors such as an epithelial tumor and small subepithelial tumor in the upper gastrointestinal tract are *** describe a case with a coexisting small leiomyoma and severe dysplasia in the esophagus which were completely resected by endoscopic mucosal resection.

关键词： Synchronous tumor Leiomyoma Dysplasia

Septic thrombophlebitis of the porto-mesenteric veins as a complication of acute appendicitis

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World Journal of Gastroenterology 2008年第28期14卷 4580-4582页

作者： yeon Soo Chang sun Young Min sun Hyung Joo Suk- Hwan Lee Department of Surgery Kyung Hee University College of MedicineSeoul 134-727South Korea

Pylephlebitis, a rare complication of acute appendicitis, is defined as thrombophlebitis of the portal venous system. Pylephlebitis usually occurs due to secondary infection in the region drained into the portal system. We report a case of pylephlebitis caused by acute appendicitis. The patient was transferred from a private clinic 1 wk after appendectomy with the chief complaints of high fever and abdominal pain. He was diagnosed with pylephlebitis of the portal vein and superior mesenteric vein by CT-scan. The patient was treated with antibiotics and anticoagulation therapy, and discharged on the 25th day and follow-up CT scan showed a cavernous transformation of portal thrombosis.

关键词： Acute appendicitis Pylephlebitis Antibiotics Anti-coagulation therapy