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Monitoring continuous k-nearest neighbor queries in the hybrid wireless network

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第3期12卷 213-220页

作者： young-Mo KWON HaRim JUNG Yon Dohn chung Department of Computer Science and Engineering Korea UniversitySeoul 136-713Korea

In a mobile/pervasive computing environment,one of the most important goals of monitoring continuous spatial queries is to reduce communication cost for *** work uses many cellular wireless connections,which would easily become the performance bottleneck of the overall *** paper introduces a novel continuous kNN query monitoring method to reduce communication cost in the hybrid wireless network,where the moving objects in the wireless broadcasting system construct the ad-hoc *** results prove the efficiency of the proposed method,which leverages the wireless broadcasting channel as well as the WiFi link to alleviate the burden on the cellular uplink communication cost.

关键词： Continuous kNN query monitoring Ad-hoc networks Wireless broadcasting systems

Imidazole linker‐induced covalent triazine framework-ZIF hybrids for confined hollow carbon super‐heterostructures toward a long‐life supercapacitor

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Carbon Energy 2023年第10期5卷 25-39页

作者： Madagonda MVadiyar Ji‐young Kim Jee‐Hwan Bae Kyung‐wan Nam Department of Energy and Materials Engineering Dongguk UniversitySeoulSouth Korea Advanced Analysis&Data Center Korea Institute of Science and Technology(KIST)SeoulSouth Korea Advanced Energy and Electronic Materials Research Center Dongguk UniversitySeoulSouth Korea

Carbon super-heterostructures with high nitrogen contents from the covalent hybrid precursors of covalent triazine frameworks(CTFs)and zeolitic imidazolic frameworks(ZIFs)are scarcely explored because of CTF's ordered structure and toxic superacid that dissolves or destabilizes the metal *** solve this problem,herein,we report a straightforward two-step pathway for the covalent hybridization of disordered CTF(d–CTF)–ZIF composites via preincorporation of an imidazole(IM)linker into ordered CTFs,followed by the imidazole-site-specific covalent growth of *** carbonization of these synthesized d–CTF−IM−ZIF hybrids results in unique hollow carbon super-heterostructures with ultrahigh nitrogen content(>18.6%),high specific surface area(1663m^(2)g^(−1)),and beneficial trace metal(Co/Zn NPs)contents for promoting the redox *** proof of concept,the obtained carbon super-heterostructure(Co–Zn–NC_(SNH)–800)is used as a positive electrode in an asymmetric supercapacitor,demonstrating a remarkable energy density of 61Wh kg^(−1)and extraordinary cyclic stability of 97%retention after 30,000 cycles at the cell *** presynthetic modifications of CTF and their covalent hybridization with ZIF crystals pave the way toward new design strategies for synthesizing functional porous carbon materials for promising energy applications.

关键词： asymmetric supercapacitor defective covalent triazine frameworks hollow carbon superheterostructures linker defect

Successful scleral buckling for long-standing retinal detachment with subretinal proliferation 4-year after strabismus surgery

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International Journal of Ophthalmology(English edition) 2019年第11期12卷 1812-1814页

作者： Hyuna Kim In young chung Department of Ophthalmology Gyeongsang National University College of MedicineJinju 52727Korea Institute of Health Science Gyeongsang National UniversityJinju 52727Korea

Dear Editor,We would like to report the case of a patient with longstanding retinal detachment(RD)with subretinal proliferation after strabismus surgery who was successfully treated by scleral *** perforation is a potentially dangerous complication of strabismus surgery that may result in vision loss or even complete blindness and pthisis bulbi[1-2].Because most cases of scleral perforation occurred with handling ocular muscles are limited in superficial in depth and short in length,and produce no complications-its true incidence is not always *** studies have reported an incidence rate of 8%-12.1%of cases[3],whereas more recent studies have reported the rate as 0.13%-2.8%[4].This decrease in the incidence has resulted from improved surgical techniques and the introduction of spatula *** awareness among surgeons may have also contributed to this *** treatment options recommended for globe perforation include observation alone,cryopexy,diathermy,and laser retinopexy[5],however,treatment is still under *** iatrogenic scleral perforation typically causes damage to the immediate adjacent choroid,and there may or may not be damage to the underlying retina,depending on the depth of the needle pass[6].

关键词： needle superficial buckling

A case of postoperative spontaneous intussusception after laparoscopic low anterior resection for rectal cancer

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Journal of Medical Colleges of PLA(China) 2016年第4期31卷 233-235页

作者： young wan Kim Department of Surgery Division of Gastrointestinal SurgeryYonsei University Wonju College of Medicine

Background:Intussusception refers to a condition in which a segment of the intestine invaginates into the lumen of an adjacent segment of the *** intussusception after gastrointestinal surgery is an uncommon clinical condition,and there is only one case report of small bowel intussusception after rectal cancer ***,we report a case of spontaneous small bowel intussusception following laparoscopic total mesorectal excision for rectal *** presentation:A 56-year-old female military officer was referred to the Colorectal Surgical Department for midrectal cancer,8cm from the anal *** patient underwent laparoscopic low anterior resection and diverting loop *** postoperative day 3,the patient complained of vomiting and abdominal pain,and a follow-up abdomino-pelvic computed tomography scan showed an ileo-ileal type *** two days of surgical observation,the clinical symptoms were not *** patient underwent exploratory *** exploration,intussusception was found 40 cm proximal to the loop ileostomy *** resection of the ileum was carried out,and there was no pathological leading point on the resected *** patient was discharged on postoperative day 14 after the second operation and has remained in good health for two ***:We present a case of spontaneous small bowel intussusception after laparoscopic total mesorectal excision for rectal cancer that was treated by surgical resection 5 days after the index surgery.

关键词： Rectal neoplasms Intussusception Postoperative complications

Impact of tumor location on clinical outcomes of gastric endoscopic submucosal dissection

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World Journal of Gastroenterology 2014年第26期20卷 8631-8637页

作者： Ji young Yoon Choong Nam Shim Sook Hee chung wan Park Hyunsoo chung Hyuk Lee Sung Kwan Shin Sang Kil Lee Yong Chan Lee Jun Chul Park Department of Internal Medicine Institute of GastroenterologyYonsei University College of Medicine

AIM: To determine whether there is a correlation between the location of the lesion and endoscopic submucosal dissection (ESD) outcome.

关键词： Endoscopic submucosal dissection Gastric neoplasm Location Complication Outcomes

Comparison of laser iridotomy using short duration532-nm Nd: YAG laser (PASCAL) vs conventional laser in dark irides

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International Journal of Ophthalmology(English edition) 2015年第2期8卷 288-291页

作者： Hye Jin chung Hae-young Park Su-young Kim HanGil Eye Hospital Department of Ophthalmology and Visual Science College of Medicine the Catholic University of Korea

AIM: To evaluate the outcome of laser iridotomy using532-nm Nd: YAG laser(PASCAL) with short pulse duration and Nd: YAG laser compared to conventional combined laser ***: Retrospective, nonrandomized, comparative case series. Forty-five eyes of 34 patients underwent laser iridotomy. Twenty-two eyes underwent iridotomy using short duration PASCAL and Nd: YAG laser, and 23 eyes underwent iridotomy using conventional combined laser method. The average settings of PASCAL were60 μm and 700-900 m W with a short duration of 0.01 s to reduce the total applied energy. The conventional laser was 50 μm and 700-900 m W for 0.1s. After photocoagulation with these laser, the Nd: YAG laser was added in each group. Endothelial cell counts of preiridotomy and 2mo after iridotomy were measured and ***: All eyes completed iridotomy *** total energy used in the PASCAL group was 1.85 ±1.17 J. Compared to conventional laser 13.25 ±1.67 J, the energy used was very small due to the short exposure time of PASCAL. Endothelial cell counts were reduced by0.88% in the PASCAL group and 6.72% in the conventional laser group(P =0.044). The change in corneal endothelial cell counts before and after iridotomy was significant in conventional combined laser iridotomy group(P =0.004).CONCLUSION: Combined PASCAL and Nd:YAG laseriridotomy is an effective and safe technique in the dark brown irides of Asians. Furthermore, the short duration of exposure in PASCAL offers the advantages of reducing the total energy used and minimizing the corneal damage.

关键词： endothelium laser iridotomy 532-nm Nd: YAG laser

Monitoring of non-point source pollutants load from a mixed forest land use

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Journal of Environmental Sciences 2010年第6期22卷 801-805页

作者： Sung wan Yoon Se Woong chung Dong Geun Oh Jae Woon Lee Department of Environmental Engineering Chungbuk National University Geum River Environmental Research Center National Institute of Environmental Research

The aim of this study was to determine the unit load of NPS （non-point source） pollutants including organic variables such as BOD （biochemical oxygen demand）, COD （chemical oxygen demand） and DOC （dissolved organic carbon）, nitrogen and phosphorus constituents, and suspended solids （SS） and their event mean concentration （EMC） of runoff flows from a water-shed of mixed forest land use by intensive field experiments. Field monitoring for continuous measurements of rainfall, flow, and water quality was conducted over 12 storm events during 2008-2009 using automated and manual sampling methods. The EMCs of individual runoff event were estimated for each water quality constituent based on the flow rate and concentration data of runoff discharge. The average EMCs of BOD, COD, DOC, SS, TN （total nitrogen）, NH4^＋-N, NO3^--N, TP （total phosphorus）, PO4^3-P from the mixed forest land were 1.794, 3.498, 1.462, 10.269, 0.862, 0.044, 0.634, 0.034, and 0.005 mg/L, respectively. The annual unit loads of BOD, COD, DOC, SS, TN, NH4^＋-N, NO3^--N, TP and PO4^3--P were estimated as 66.9, 133.2, 55.5, 429.8, 36.5, 1.6, 26.9, 1.3 and 0.1 kg/（ha·yr）, respectively. In addition, affecting parameters on the EMCs were investigated by statistic analysis of the field data. As a result, significant correlations with precipitation, rainfall intensity, and total runoff flows were found in most constituents.

关键词： event mean concentration mixed forest land use non-point source pollutant load unit load

Identification and validation of a pyroptosis-related prognostic model for colorectal cancer based on bulk and single-cell RNA sequencing data

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World Journal of Clinical Oncology 2024年第2期15卷 329-355页

作者： Li-Hua Zhu Jun Yang Yun-Fei Zhang Li Yan wan-Rong Lin Wei-Qing Liu Department of Surgical Oncology The First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina Department of Internal Medicine-Oncology The First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina Department of Oncology The First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina

BACKGROUND Pyroptosis impacts the development of malignant tumors,yet its role in colorectal cancer(CRC)prognosis remains *** To assess the prognostic significance of pyroptosis-related genes and their association with CRC immune *** Gene expression data were obtained from The Cancer Genome Atlas(TCGA)and single-cell RNA sequencing dataset GSE178341 from the Gene Expression Omnibus(GEO).Pyroptosis-related gene expression in cell clusters was analyzed,and enrichment analysis was conducted.A pyroptosis-related risk model was developed using the LASSO regression algorithm,with prediction accuracy assessed through K-M and receiver operating characteristic analyses.A nomo-gram predicting survival was created,and the correlation between the risk model and immune infiltration was analyzed using CIBERSORTx ***,the differential expression of the 8 prognostic genes between CRC and normal samples was verified by analyzing TCGA-COADREAD data from the UCSC *** An effective pyroptosis-related risk model was constructed using 8 genes-CHMP2B,SDHB,BST2,UBE2D2,GJA1,AIM2,PDCD6IP,and SEZ6L2(P<0.05).Seven of these genes exhibited differential expression between CRC and normal samples based on TCGA database analysis(P<0.05).Patients with higher risk scores demonstrated increased death risk and reduced overall survival(P<0.05).Significant differences in immune infiltration were observed between low-and high-risk groups,correlating with pyroptosis-related gene *** We developed a pyroptosis-related prognostic model for CRC,affirming its correlation with immune *** model may prove useful for CRC prognostic evaluation.

关键词： Colorectal cancer Pyroptosis Single-cell RNA sequencing Immune infiltration Prognostic model

Lithium plating-free 1 Ah-level high-voltage lithium-ion pouch battery via ambi-functional pentaerythritol disulfate

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能源化学:英文版 2023年第8期83卷 229-238,I0007页

作者： Dung Tien Tuan Vu Jinsol Im Jae-Hee Kim Jisoo Han Gyeong Jun chung Giang Thi Huong Nguyen Junhyeok Seo Minjae Kim Eui-Hyung Hwang young-Gil Kwon Jae Wook Shin Kuk young Cho Seung-wan Song Department of Chemical Engineering&Applied Chemistry Chungnam National UniversityDaejeon 34134Republic of Korea Department of Materials Science&Chemical Engineering Hanyang UniversityAnsan 15588Republic of Korea Fine Chem Co.Ltd. Daejeon 34365Republic of Korea d CSIM Co.Ltd. Yesan 32400Republic of Korea Dongwha Electrolyte Nonsan 32925Republic of Korea

Elevating the charge cut-off voltage beyond traditional 4.2 V is a commonly accepted technology to increase the energy density of Li-ion batteries(LIBs) but the risk of Li-dendrites and fire hazard increases as well. The use of ambi-functional additive, which forms stable solid electrolyte interphase(SEI) simultaneously at both cathode and anode, is a key to enabling a dendrites-free and well-working high-voltage LIB. Herein, a novel ambi-functional additive, pentaerythritol disulfate(PEDS), at 1 wt% without any other additive is demonstrated. We show the feasibility and high impacts of PEDS in forming lithium sulfateincorporated robust SEI layers at NCM523 cathode and graphite anode in 1 Ah-level pouch cell under4.4 V, 25 °C and 0.1 C rate, which mitigates the high-voltage instability, metal-dissolution and cracks on NCM523 particles, and prevents Li-dendrites at graphite anode. Improved capacity retention of 83%after 300 cycles is thereby achieved, with respect to 69% with base electrolyte, offering a promising path toward the design of practical high-energy LIBs.

关键词： Lithium-ion pouch cell Lithium plating-free High-voltage Ambi-functional additive SEI layer