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Spatial prediction of landslide susceptibility in western Serbia using hybrid support vector regression(SVR)with GWO,BAT and COA algorithms

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Geoscience Frontiers 2021年第3期12卷 384-398页

作者： Abdul-Lateef Balogun Fatemeh Rezaie Quoc Bao Pham Ljubomir Gigović Siniša Drobnjak Yusuf AAina Mahdi Panahi Shamsudeen Temitope Yekeen Saro lee Geospatial Analysis and Modelling(GAM)Research Group Department of Civil&Environmental EngineeringUniversitit Teknologi PETRONS(UTP)Seri Iskandar 32610PerakMalaysia Geoscience Platform Research Division Korea Institute of Geoscience and Mineral Resources(KIGAM)124Gwahak-ro Yuseong-guDaejeon 34132Republic of Korea Department of Geophysical Exploration Korea University of Science and Technology217 Gajeong-ro Yuseong-guDaejeon 34113Republic of Korea Institute of Research and Development Duy Tan UniversityDanang 550000Vietnam Department of Geography University of Defence11000 BelgradeSerbia Military Geographical Institute 11000 BelgradeSerbia Department of Geomatics Engineering Technology Yanbu Industrial CollegeYanbuSaudi Arabia Division of Science Education College of Education#4–301Gangwondaehak-gil Chuncheon-siKangwon National UniversityGangwon-do 24341Republic of Korea Faculty of Environmental and Chemical Engineering Duy Tan UniversityDanang 550000Vietnam

In this study,we developed multiple hybrid machine-learning models to address parameter optimization limitations and enhance the spatial prediction of landslide susceptibility *** created a geographic information system database,and our analysis results were used to prepare a landslide inventory map containing 359 landslide events identified from Google Earth,aerial photographs,and other validated sources.A support vector regression(SVR)machine-learning model was used to divide the landslide inventory into training(70%)and testing(30%)*** landslide susceptibility map was produced using 14 causative *** applied the established gray wolf optimization(GWO)algorithm,bat algorithm(BA),and cuckoo optimization algorithm(COA)to fine-tune the parameters of the SVR model to improve its predictive *** resultant hybrid models,SVR-GWO,SVR-BA,and SVR-COA,were validated in terms of the area under curve(AUC)and root mean square error(RMSE).The AUC values for the SVR-GWO(0.733),SVR-BA(0.724),and SVR-COA(0.738)models indicate their good prediction rates for landslide susceptibility ***-COA had the greatest accuracy,with an RMSE of 0.21687,and SVR-BA had the least accuracy,with an RMSE of *** three optimized hybrid models outperformed the SVR model(AUC=0.704,RMSE=0.26689),confirming the ability of metaheuristic algorithms to improve model performance.

关键词： Landslide Machine learning Metaheuristic Spatial modeling Support vector regression

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Characteristics of and risk factors for colorectal neoplasms in young adults in a screening population

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World Journal of Gastroenterology 2016年第10期22卷 2981-2992页

作者： Seung Eun lee Hee Bum Jo Won Gun Kwack Yun Jin Jeong Yeo-Jin Yoon Hyoun Woo Kang Department of Internal Medicine Dongguk University Ilsan HospitalCollege of Medicine

AIM: To investigate prevalence and risk factors for colorectal neoplasms in adults aged < 50 years, for whom screening is not ***: This cross-sectional study compared prevalence and characteristics of colorectal and advanced adenomas in patients aged < 50 years who underwent colonoscopy screening with subjects aged ≥ 50 years. To evaluate risk factors for colorectal and advanced adenoma in young adults, we used multivariable logistic regression models. Colorectal neoplasm characteristics were evaluated and compared with those in older ***: Among 2819 patients included, prevalences of colorectal adenoma and advanced adenoma were 19.7% and 1.5%, respectively. As patient age increased, so did the prevalence of colorectal neoplasm. However, prevalence of advanced adenoma did not differ between age-groups 45-49 years and ≥ 50 years(OR = 0.43, 95%CI: 0.17-1.07, P = 0.070). In younger age-group(< 50 years), colorectal adenoma was significantly associated with older age, waist circumference(OR = 1.72, 95%CI: 1.15-2.55, P = 0.008), and current smoking(OR = 1.60, 95%CI: 1.07-2.41, P = 0.023). Alcohol consumption was an independent risk factor for colorectal advanced adenoma(OR = 3.69, 95%CI: 1.08-12.54, P = 0.037). Multiple neoplasms and large neoplasms(≥ 1 cm) were more prevalent in subjects ≥ 50 ***: Current screening strategies for colorectal cancer may need to be amended to account for patient age, especially in young subjects with abdominal obesity, current smoking and alcohol consumption.

关键词： Colorectal adenoma Advanced adenoma Colorectal cancer Cancer screening Young patients

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Gastroduodenal intussusception caused by gastric gastrointestinal stromal tumor:A case report and review of the literature

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World Journal of Clinical Cases 2021年第4期9卷 838-846页

作者： Yi-Lun Hsieh Wen-Hung Hsu Ching-Chun lee Chun-Chieh Wu Deng-Chyang Wu Jeng-Yih Wu Division of Gastroenterology Department of Internal MedicineKaohsiung Medical University HospitalKaohsiung 807Taiwan Division of Colorectal Surgery Department of SurgeryKaohsiung Medical University HospitalKaohsiung 807Taiwan Department of Pathology Kaohsiung Medical University HospitalKaohsiung 807Taiwan

BACKGROUND Gastric gastrointestinal stromal tumor(GIST)is the most common etiology of gastroduodenal *** gastroduodenal intussusception caused by gastric GIST is mostly treated by surgical resection,the first case of gastroduodenal intussusception caused by gastric GIST was treated by endoscopic submucosal dissection(ESD)in Japan in *** SUMMARY An 84-year-old woman presented with symptoms of postprandial fullness with nausea and occasional vomiting for a ***,she visited a local clinic for help,where abdominal sonography revealed a space-occupying lesion around the liver,so she was referred to our hospital for further *** sonography was repeated,which revealed a mass with an alternating concentric echogenic ***(EGD)was performed under the initial impression of gastric cancer with central necrosis and showed a tortuous distortion of gastric folds down from the lesser curvature side to the duodenal bulb with stenosis of the gastric *** was barely passed through to the 2nd portion of the duodenum and a friable ulcerated mass was *** differential diagnoses were suspected,including gastroduodenal intussusception,gastric cancer invasion to the duodenum,or pancreatic cancer with adherence to the gastric antrum and *** computed tomography for further evaluation was arranged and showed gastroduodenal intussusception with a long stalk polypoid mass 5.9 cm in the duodenal *** the impression of gastroduodenal intussusception,ESD was performed at the base of the gastroduodenal intussusception;unfortunately,a gastric perforation was found after complete resection was accomplished,so gastrorrhaphy was performed for the perforation and retrieval of the huge polypoid *** gastric tumor was pathologically proved to be a *** the operation,there was no digestive disturbance and the patient was discharged uneventfully on the 10th day following the op

关键词： Gastric gastrointestinal stromal tumor Endoscopic submucosal dissection Gastro-duodenal intussusception Elderly Esophagogastroduodenoscopy Gastrointestinal obstruction Case report

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Bacillary layer detachment presenting with posterior scleritis:case report

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Annals of Eye Science 2022年第3期7卷 67-71页

作者： Gregory W.Bligard Andrew R.lee Lynn M.Hassman Department of Ophthalmology and Visual Sciences Washington University in St.Louis School of MedicineSt.LouisMOUSA

Background:Bacillary layer detachment(BALAD)is a phenomenon characterized by fluid accumulation at the myoid region of the inner photoreceptor segments identifiable on optical coherence tomography(OCT)*** finding has been recently described in patients with diverse primary diagnoses which share the common feature of serous exudation in the posterior ***,thus far there have been very few reports in the literature of BALAD in patients with posterior *** Description:A 16-year-old male presented with unilateral vision changes that acutely worsened overnight to significant unilateral vision *** was eventually diagnosed with idiopathic posterior scleritis with associated BALAD on *** to other reported cases of BALAD,he experienced anatomic restoration of the outer retina followed by good visual recovery after treatment with high dose steroid,ultimately with complete recovery of both retinal anatomy and vision within 4 ***:This case provides further evidence that posterior scleritis can be a cause of *** rapid presentation and excellent visual and anatomical outcome of this case is entirely consistent with known descriptions of BALAD in a variety of other conditions,further supporting the categorization of BALAD as an entity which retinal specialists should be able to recognize as distinct from other forms of intraretinal fluid,retinal detachment,and retinoschisis.

关键词： Case report bacillary layer detachment(BALAD) photoreceptor scleritis inner segment

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Clinical characteristics and progression of liver abscess caused by toxocara

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World Journal of Hepatology 2016年第18期8卷 757-761页

作者： Kyung Ho Ha Jung Eun Song Byung Seok Kim Chang Hyeong lee Department of Internal Medicine Daegu Medical Center Department of Internal Medicine Division of Gastroenterology and HepatologyDaegu Catholic University

AIM: To evaluate the clinical characteristics and progression of liver abscess caused by ***: We retrospectively reviewed the medical records of patients with serum Ig G antibody to Toxocara canis and liver abscess diagnosed using abdominal computed tomography between February 2010 and February 2015. Among 84 patients exhibiting serum Ig G antibody to Toxocara canis, 34 patients were diagnosed with liver asbscess and treated with albendazole. A follow-up period of 1 year was conducted. RESULTS: Mean patient age was 53(34-79) years, with 26(76.5%) patients being male. Twenty-one(61.7%) patients were moderate or heavy drinkers, 23(67.6%) patients had a history of eating raw meat or liver and 6(17.6%) patients owned pet dogs or cats. Main patient symptoms consisted of right upper quadrant pain, fever, and fatigue; 18(52.9%) patients, however, presented with no symptoms. Lung involvement was detected in 444(11.7%) patients. The eosinophil count increased in 29(85.3%) patients at initial diagnosis, and decreased in most patients after albendazole treatment. The initial serum Ig E level increased in 25(73.5%) patients, but exhibited various response levels after albendazole treatment. Liver abscess formation improved in all ***: The liver abscess was improved with albendazole treatment.

关键词： Toxocariasis Liver abscess Eosinophilia

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Self-Assembled Wire Arrays and ITO Contacts for Silicon Nanowire Solar Cell Applications

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Chinese Physics Letters 2011年第3期28卷 132-135页

作者： YANG Cheng ZHANG Gang lee Dae-Young LI Hua-Min LIM Young-Dae YOO Won Jong PARK Young-Jun KIM Jong-Min Sungkyunkwan University SKKU Advanced Institute of Nano Technology300 Cheoncheon-dongJangan-guSuwon 440-746Korea Samsung Electronics Co.Ltd. San 14-1 Nongseo-dongGiheung-guYongin 446-712Korea

Self-assembly of silicon nanowire(SiNW)arrays is studied using SF_(6)/0_(2)plasma *** self-assembly method can be applied to single-and poly-crystalline Si *** conditions can control the length and diameter of the SiNW *** reflectance of the wire arrays over the wavelength range 200-1100nm is *** conducting transparent indium-tin-oxide(ITO)electrode can be fully coated on the self-assembled SiNW arrays by *** ITO-coated SiNW solar cells show the same low surface light reflectance and a higher carrier collection efficiency than SiNW solar cells without ITO *** efficiency enhancement of around 3 times for ITO coated SiNW solar cells is demonstrated via experiments.

关键词： reflectance Solar transparent

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Overseas immigration of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), invading Korea and Japan in 2019

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Insect Science 2022年第2期29卷 505-520页

作者： Ming-Fei Wu Guo-Jun Qi Hui Chen Jian Ma Jie Liu Yu-Ying Jiang Gwan-Seok lee Akira Otuka Gao Hu College of Plant Protection Nanjing Agricultural UniversityNanjing210095 China Guangdong Provincial Key Laboratory of High Technology for Plant Protection/Plant Protection Research Institute Guangdong Academy of Agricultural SciencesGuangzhou510640 China Division of Pest Forecasting China National Agro-Tech Extension and Service CenterBeijing100026 China Department of Agro-food Safety and Crop Protection National Institute of Agricultural SciencesWanju55365 Korea Institute of Agricultural Machinery National Agriculture and Food Research OrganizationTsukuba3058517 Japan

The fall armyworm(FAW),Spodoptera frugiperda(***),spread rapidly in Africa and Asia recently,causing huge economic losses in crop *** armyworm caterpillars were first detected in South Korea and Japan in June ***,the migration timing and path for FAW into the countries were estimated by a trajectory simulation approach implementing the insect's flight *** result showed that FAWs found in both South Korea and Japan were estimated to have come from eastern China by crossing the Yellow Sea or the East China Sea in 10–36 h in three series of *** the first series,FAW moths that arrived on Jeju Island during 22–24 May were estimated to be from Zhejiang,Anhui and Fujian Provinces after 1–2 nights’*** the second series,it was estimated that FAW moths landed in southern Korea and Kyushu region of Japan simultaneously or successively during 5–9 June,and these moths mostly came from Guangdong and Fujian *** FAW moths in the third series were estimated to have immigrated from Taiwan Province onto Okinawa Islands during 19–24 *** these migrations,southwesterly low-level jets extending from eastern China to southern Korea and/or Japan were observed in the northwestern periphery of the western Pacific Subtropical *** results,for the first time,suggested that the overseas FAW immigrants invading Korea and Japan came from eastern and southern *** study is helpful for future monitoring,early warning and the source control of this pest in the two countries.

关键词： Asian migration arena atmospheric circulation Spodoptera frugiperda trajectory analysis windbome insect migration

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Carbon and nitrogen dynamics in a Pinus densiflora forest with low and high stand densities

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Journal of Plant Ecology 2013年第5期6卷 368-379页

作者： Nam Jin Noh Choonsig Kim Sang Won Bae Woo Kyun lee Tae Kyung Yoon Hiroyuki Muraoka Yowhan Son Division of Environmental Science and Ecological Engineering Korea UniversitySeoul 136-713Republic of Korea River Basin Research Center Gifu UniversityGifu 501-1193Japan Department of Forest Resources Gyeongnam National University of Science and TechnologyJinju 660-758Republic of Korea Department of Forest Conservation Korea Forest Research InstituteSeoul 130-712Republic of Korea

Aims Understanding carbon(C)and nitrogen(N)dynamics and their dependence on the stand density of an even-aged,mature forest provides knowledge that is important for forest *** study investigated the differences in ecosystem total C and N storage and flux between a low-density stand(LD)and a high-density stand(HD)and examined the effects of stand density on aboveground net primary productivity(ANPP),total belowground C allocation(TBCA)and net ecosystem production(NEP)in a naturally regenerated,65-to 75-year-old Pinus densiflora *** *** LD(450 trees ha^(−1))and HD(842 trees ha^(−1))were established in an even-aged,mature *** forest in September *** forest had been naturally regenerated following harvesting,and the stand density was naturally maintained without any artificial management such as *** diameter at breast height(DBH≥5.0cm)of all live stems within the stands was measured yearly from 2007 to *** compare C and N storage and fluxes in LD and HD,C and N pools in aboveground and belowground biomass,the forest floor,coarse woody debris(CWD)and soil;soil CO_(2) efflux(R_(S));autotrophic respiration(R_(A));litter production;and soil N availability were ***,ANPP,TBCA and NEP were estimated from plot-based measurement *** Findings Ecosystem C(Mg C ha^(−1))and N(Mg N ha^(−1))storage was,respectively,173.0±7.3(mean±SE)and 4.69±0.30 for LD and 162±11.8 and 4.08±0.18 for *** were no significant differences in C and N storage in the ecosystem components,except for soils,between the two *** contrast,there were significant differences in aboveground ANPP and TBCA between the two stands(P<0.05).Litterfall,biomass increment and R_(S) were major C flux components with values of,respectively,3.89,3.74 and 9.07 Mg C ha^(−1) year^(−1) in LD and 3.15,2.94 and 7.06 Mg C ha^(−1) year^(−1) in ***-based NEP(Mg C ha^(−1) year^(−1))was 4.18 in LD and 5.50 in *** the even-aged,mature P

关键词： aboveground net primary productivity net ecosystem production Japanese red pine stand density total belowground carbon allocation

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A Study on the Application Analysis of the Railway System of Tap-Changing Transformer

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Journal of Energy and Power Engineering 2021年第5期15卷 169-176页

作者： Jong-young Park Chang-Mu lee Hanmin lee Moon-Seob Han Korea Railroad Research Institute Cheoldobangmulgwan-ro Uiwang-siGyeonggi-do 437-757Korea

In this paper,a new type of automatic transmitter(AT)is proposed to properly adjust the voltage of the train without installing additional *** proposed tap-changing AT is expected to raise the voltage between catenary and rail by regulating the turn-ratio between primary and secondary winding according to catenary voltage and verified its effects through the multi ports network analysis technique modeling of *** the simulation and analysis of the electric railway systems,it is shown that it can secure the load capacity and solve the large voltage drop problem by raising the voltage across railway vehicles back to the normal voltage level.

关键词： Railway voltage drop tap-changing AT power compensation

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Diffractive multifocal intraocular lens implantation in patients with monofocal intraocular lens in the contralateral eye

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International Journal of Ophthalmology(English edition) 2020年第5期13卷 737-743页

作者： Jae Yong Kim Yunhan lee Hun Jae Won Hyerin Jeong Jin Hyoung Park Myoung Joon Kim Hungwon Tchah Department of Ophthalmology University of Ulsan College of MedicineAsan Medical CenterSeoul 05505Republic of Korea University of Ulsan College of Medicine Seoul 05505Republic of Korea

AIM:To evaluate clinical outcomes of unilateral implantation of a diffractive multifocal intraocular lens(IOL)in patients with contralateral monofocal ***:Twenty-two patients who already had implantation of a monofocal IOL in unilateral eye underwent implantation of a diffractive multifocal IOL in contralateral eye were *** 1,6,and 12 mo,uncorrected and distant corrected distant visual acuity(UCDVA and DCDVA),uncorrected and distant corrected intermediate-visual acuity(UCIVA and DCIVA),uncorrected and distant corrected near visual acuity(UCNVA and DCNVA),and contrast sensitivity were ***/glare symptoms,spectacle dependence,and patient satisfaction were also ***:The mean age was 67.86±7.25 y and the average interval between two IOL implantations was 645.82±878.44 *** 1 mo,binocular UCDVA was lower than 0.20 logMAR in 76%of patients(mean 0.12±0.13 logMAR),which increased to 90%by 6 and 12 *** binocular UCDVA was significantly better than the monocular results(P<0.05)at 1,6,and 12 ***,UCNVA was lower than 0.40 logMAR in 82%of patients,increasing to 90%by 6 and 12 *** UCNVA in the multifocal IOL implanted eye was statistically significantly better than that in the monofocal IOL implanted eye(P<0.05)at 1,6,and 12 *** 5%of patients at 1 and 6 mo,reported"severe glare or halo".Patient satisfaction rates were 95%and 91%at 6 and 12 mo,***:Unilateral implantation of multifocal IOL in patients with a contralateral,monofocal IOL implantation results in high patient satisfaction rate,with low severe glare or halo rate during *** can represent a good option for patients who have previously had a monofocal IOL implantation regardless of two year interval duration between two IOL implantations.

关键词： diffractive multifocal intraocular lens unilateral implantation near vision cataract surgery

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