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Segmental artery injury during transforaminal percutaneous endoscopic lumbar discectomy:Two case reports

World Journal of Clinical Cases 2022年第33期10卷 12345-12351页

作者： wan-jae cho Ki-Won Kim Hyung-Youl Park Bo-Hyoung Kim Jun-Seok Lee Department of Orthopedic Surgery Yeouido St.Mary’s HospitalCollege of MedicineCatholic University of KoreaSeoul 07345South Korea Department of Orthopedic Surgery Eunpyeong St.Mary’s HospitalCollege of MedicineCatholic University of KoreaSeoul 03312South Korea

BACKGROUND Since Kambin experimentally induced arthroscopy to treat herniated nucleus pulposus,percutaneous endoscopic lumbar discectomy(PELD)has been *** branch of the segmental artery around the neural foramen may be damaged during PELD using the transforaminal *** report 2 rare cases in which segmental artery injury that occurred during PELD was treated with emergency *** SUMMARY In case 1,a 31-year-old man was transferred to our emergency department with left lower quadrant abdominal pain after PELD at a local *** spine magnetic resonance imaging after the surgery showed a hematoma of the left retroperitoneal area and the psoas muscle *** suspicion of vascular injury,arteriography was *** and blood leakage from the left 4th lumbar segmental artery into the abdominal cavity were *** transarterial embolization was performed using fibered microcoils for bleeding of the segmental *** case 2,a 75-year-old woman was transferred to our emergency department with low blood pressure,right flank pain,and drowsy mental status after PELD at a local *** the patient arrived at the emergency room,the blood pressure decreased from 107/55 mmHg to 72/47 *** blood pressure *** suspicion of vessel injury,arteriography was performed,and the right 4th lumbar segmental artery rupture was *** transarterial embolization was performed for bleeding of segmental *** We were able to find the bleeding focus by angiography and treat the injury of the segmental artery successfully through emergency transarterial embolization.

关键词： Percutaneous endoscopic lumbar discectomy Segmental artery injury Transarterial embolization Angiography Case report

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Study on adhesively-bonded surface of tapered double cantilever specimen made of aluminum foam affected with shear force

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Journal of Central South University 2015年第12期22卷 4521-4527页

作者：孙洪鹏 cho jae-ung Division of Mechanical Engineering Graduate School Kongju National University Division of Mechanical and Automotive Engineering Kongju National University

Aluminum foam is widely used in diverse areas to minimize the weight and maximize the absorption of shock energy in lightweight structures and various *** presents a number of advantages,such as low density,incombustibility,non-rigidity,excellent energy absorptivity,sound absorptivity and low heat *** aluminum foam with an air cell structure was placed under the TDCB Mode II tensile load by using Landmark equipment manufactured by MTS to examine the shear failure *** angle of the tapered adhesively-bonded surfaces of specimens was designated as a variable,and three models were developed with the inclined angles differing from one another at 6°,8° and 10°.The specimens with the inclined angles of 6°,8° and 10° have the maximum reaction forces of 168 N,194 N when the forced displacements are 6,5 and 4.2 mm *** are three specimens with the inclined angles of 10°,8° and 6° in the order of maximum reaction *** the analysis result,the maximum equivalent stresses of 0.813 MPa and 0.895 MPa happened when the forced displacements of 6 mm and 5 mm proceeded at the models of 6° and 8°,respectively.A simulation was carried out on the basis of finite element method and the experimental *** results of the experiment and the simulation analysis are shown not different from each other ***,only a simulation could be confirmed to be performed in substitution of an experiment,which is costly and time-consuming in order to determine the shearing properties of materials made of aluminum foam with artificial data.

关键词： adhesive displacement force reaction shearing fracture characteristic tapered double cantilever beam(TDCB)

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Survival analysis based on human epidermal growth factor 2 status in stage Ⅱ-Ⅲ gastric cancer

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World Journal of Gastroenterology 2017年第41期23卷 7407-7414页

作者： Jang Ho cho jae Yun Lim jae Yong cho Division of Medical Oncology Department of Internal Medicine Gangnam Severance Hospital Yonsei University College of Medicine

AIM To investigate human epidermal growth factor 2(HER2) overexpression and validate its prognostic effect in stage Ⅱ-Ⅲ gastric *** We reviewed the data of patients who were diagnosed with gastric cancer between March 2008 and October 2013 at the Yonsei University Medical Center. Among these patients, 384 patients who met the inclusion criteria were analyzed retrospectively. RESULTS Thirty-two(8.3%) of the 384 stage Ⅱ-Ⅲ gastric cancer patients exhibited HER2 overexpression. The median follow-up duration was 26.0 mo. HER2-negative patients had superior recurrence-free survival(RFS) compared to HER2-positive patients(HR = 0.52, 95%CI: 0.30-0.89; P = 0.015). The median overall survival(OS) was significantly prolonged in the HER2-negative group compared with the HER2-positive group(55.0 mo vs 38.0 mo, HR = 0.43, 95%CI: 0.21-0.88, P = 0.021). OS was also prolonged in HER2-negative patients who received adjuvant chemotherapy compared to HER2-positive patients(55.0 vs 38.0mo, HR = 0.42, 95%CI: 0.18-1.00, P = 0.051). In patients who did not receive adjuvant chemotherapy,the median RFS was prolonged in the HER2-negative group compared to the HER2-positive group(not reached vs 12.0 mo, HR = 0.17, 95%CI: 0.06-0.49, P= 0.001). In a multivariate analysis, HER2 status(HR= 0.421, 95%CI: 0.206-0.861, P = 0.018) and Eastern Cooperative Oncology Group performance status(HR = 2.002, 95%CI: 1.530-2.618, P < 0.001) were independent predictors of *** Our findings showed that HER2-positive patients had inferior OS and RFS. Stage Ⅱ-Ⅲ HER2-positive patients might be potential candidates for targeted therapies involving trastuzumab.

关键词： Trastuzumab Gastric neoplasm Human epidermal growth factor 2

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Porous Microspheres Comprising CoSe2 Nanorods Coated with N-Doped Graphitic C and Polydopamine-Derived C as Anodes for Long-Lived Na-Ion Batteries

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Nano-Micro Letters 2022年第7期14卷 118-139页

作者： jae Seob Lee Rakesh Saroha Jung Sang cho Department of Engineering Chemistry Chungbuk National UniversityCheongjuChungbuk 361-763Republic of Korea

Metal–organic framework-templated nitrogen-doped graphitic carbon(NGC)and polydopaminederived carbon(PDA-derived C)-double coated one-dimensional CoSe_(2) nanorods supported highly porous threedimensional microspheres are introduced as anodes for excellent Na-ion batteries,particularly with long-lived cycle under carbonate-based electrolyte *** microspheres uniformly composed of ZIF-67 polyhedrons and polystyrene nanobeads(φ=40 nm)are synthesized using the facile spray pyrolysis technique,followed by the selenization process(P-CoSe_(2)@NGC NR).Further,the PDA-derived C-coated microspheres are obtained using a solution-based coating approach and the subsequent carbonization process(P-CoSe_(2)@PDA-C NR).The rational synthesis approach benefited from the synergistic effects of dual carbon coating,resulting in a highly conductive and porous nanostructure that could facilitate rapid diffusion of charge species along with efficient electrolyte infiltration and effectively channelize the volume ***,the prepared nanostructure exhibits extraordinary electrochemical performance,particularly the ultra-long cycle life *** instance,the advanced anode has a discharge capacity of 291(1000th cycle,average capacity decay of 0.017%)and 142 mAh g^(-1)(5000th cycle,average capacity decay of 0.011%)at a current density of 0.5 and 2.0 A g^(-1),respectively.

关键词： Spray pyrolysis Sodium-ion batteries Cobalt selenide nanorods Porous microspheres Dual carbon coating

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Simple method for extracting the seasonal signals of photochemical reflectance index and normalized difference vegetation index measured using a spectral reflectance sensor

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Journal of Integrative Agriculture 2021年第7期20卷 1969-1986页

作者： jae-Hyun RYU Dohyeok OH jaeil cho Department of Applied Plant Science Chonnam National UniversityGwangju 61186Republic of Korea

A spectral reflectance sensor(SRS)fixed on the near-surface ground was developed to support the continuous monitoring of vegetation indices such as the normalized difference vegetation index(NDVI)and photochemical reflectance index(PRI).NDVI is useful for indicating crop growth/phenology,whereas PRI was developed for observing physiological ***,the seasonal change patterns of NDVI and PRI are two valuable pieces of information in a crop-monitoring ***,capturing the seasonal patterns is considered challenging because the vegetation index values estimated by the reflection from vegetation are often governed by meteorological conditions,such as solar irradiance and ***,unlike growth/phenology,the physiological condition has diurnal changes as well as seasonal *** study proposed a novel filtering method for extracting the seasonal signals of SRS-based NDVI and PRI in paddy rice,barley,and ***,the measurement accuracy of SRSs was compared with handheld spectrometers,and the R^(2)values between the two devices were 0.96 and 0.81 for NDVI and PRI,***,the experimental study of threshold criteria with respect to meteorological variables(i.e.,insolation,cloudiness,sunshine duration,and precipitation)was conducted,and sunshine duration was the most useful one for excluding distorted values of the vegetation *** data processing based on sunshine duration,the R^(2)values between the measured vegetation indices and the extracted seasonal signals of vegetation indices increased by approximately 0.002–0.004(NDVI)and 0.065–0.298(PRI)on the three crops,and the seasonal signals of vegetation indices became noticeably *** method will contribute to an agricultural monitoring system by identifying the seasonal changes in crop growth and physiological conditions.

关键词： photochemical reflectance index normalized difference vegetation index vegetation remote sensing spectral reflectance sensor

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Microstructure comparison of ZK60 alloy under casting,twin roll casting and hot compression

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Transactions of Nonferrous Metals Society of China 2010年第5期20卷 763-768页

作者：王守仁王敏 KANG Suk-bong cho jae-hyung School of Mechanical Engineering University of Ji'nan School of Materials Science and Engineering Shandong University Korea Institute of Materials Science 66 Sangnam-dongChangwon 641010Korea

The microstructures of ZK60 alloy under conventional direct as-casting (DC),twin roll casting (TRC) and twin roll casting followed by hot compression (TRC-HC) were analyzed by optical morphology (OM),electron backscatter diffraction (EBSD) and X-ray diffraction (XRD).The deformation condition of hot compression is 350 ℃,0.1 s?*** microstructural evolution under TRC-HC deformation followed by annealing at different temperatures and time was *** results show that TRC provides more modified microstructure compared with *** are found in TRC processing;dynamic recrystallization (DRX),shear bands and twins are found in TRC-HC.A short annealing time has little effect on hardness,while during a long time annealing,it is found that low annealing temperatures increase the micro-hardness and high temperature decreases it.

关键词： microstructural evolution anneal dynamic recrystallization static recrystallization twin-roll casting hot compression magnesium alloy ZK60

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Porously Reduced 2-Dimensional Bi_(2)O_(2)CO_(3) Petals for Strain-Mediated Electrochemical CO_(2) Reduction to HCOOH

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Energy & Environmental Materials 2024年第1期7卷 215-221页

作者： Won Seok cho Dae Myung Hong wan jae Dong Tae Hyung Lee Chul Jong Yoo Donghwa Lee Ho Won Jang Jong-Lam Lee Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)Pohang Gyungbuk 37673Korea Department of Materials Science and Engineering Research Institute of Advanced Materials Seoul National UniversitySeoul 08826Korea

Here we introduce bismuth-based catalysts for the efficient electrochemical reduction of CO_(2)to formic acid(HCOOH),which are composed of petal-shaped Bi_(2)O_(2)CO_(3)(BOC)that spontaneously formed from Bi thin film in aqueous carbonate solution at room *** the electrochemical reduction process,the BOC petals transform to reduced BOC(R-BOC)consisting of individual BOC and Bi *** mismatch between both domains induces biaxial strain at the *** functional theory calculations suggest that the tensile strain on the Bi domain stabilizes the*Ocho intermediate,reducing the thermodynamic barrier toward CO_(2)conversion to *** with the thermodynamic benefit and the unique nanoporous petal-shaped morphology,R-BOC petals have a superior Faradaic efficiency of 95.9%at-0.8 V_(RHE)for the electrochemical conversion of CO_(2)to *** work demonstrates that the spontaneously formed binary phases with desirable lattice strain can increase the activity of bismuth catalysts to the CO_(2)reduction reaction;such a strategy can be applicable in design of various electrocatalysts.

关键词： bismuth carbon dioxide reduction formic acid heterointerfaces strain

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Numerical Analysis of the Adhesive Forces in Nano-Scale Structure

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Journal of Bionic Engineering 2006年第4期3卷 209-216页

作者： Young-Sam cho Houkseop Han wan-Doo Kim Department of Future Technology Korea Institute of Machinery and Materials Daejeon 305-343 Republic of Korea

Nanohairs, which can be found on the epidermis of Tokay gecko＇s toes, contribute to the adhesion by means of van der Waals force, capillary force, etc. This structure has inspired many researchers to fabricate the attachable nano-scale structures. However, the efficiency of artificial nano-scale structures is not reliable sufficiently. Moreover, the mechanical parameters related to the nano-hair attachment are not yet revealed qualitatively. The mechanical parameters which have influence on the ability of adhesive nano-hairs were investigated through numerical simulation in which only van der Waals force was considered. For the numerical analysis, finite element method was utilized and van der Waals force, assumed as 12-6 Lennard-Jones potential, was implemented as the body force term in the finite element formulation.

关键词： numerical analysis adhesive force nano-scale structure finite element model van der Waals force 12-6 L-J potential

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Targeted therapy in gastric cancer:Personalizing cancer treatment based on patient genome

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World Journal of Gastroenterology 2014年第8期20卷 2042-2050页

作者： Sun Min Lim jae Yun Lim jae Yong cho Division of Medical Oncology Department of Internal MedicineSeverance HospitalYonsei University College of MedicineSeoul 135-720South Korea Department of Medical Oncology Gangnam Severance HospitalYonsei University College of MedicineSeoul 135-720South Korea

Gastric cancer is the second leading cause of cancerrelated deaths *** cytotoxic chemotherapy has limited efficacy for metastatic gastric cancer,with an overall survival of approximately ten *** advances in high-throughput technologies have enabled the implementation of personalized cancer therapy for high-risk *** use of such high-throughput technologies,including microarray and next generation sequencing,have promoted the discovery of novel targets that offer new treatment strategies for patients lacking other therapeutic *** molecular pathways are currently under investigation as therapeutic targets in gastric cancer,including those related to the epidermal growth factor receptor family,the mesenchymal-epithelial transition factor axis,and the phosphatidylinositol 3-kinase-AKTmammalian target of rapamycin *** in molecular diagnostic tools further support the discovery of new molecular *** exist,however;not all patients can be tested for biomarkers,and numerous challenges hamper implementation of targeted therapy in clinical ***,the scale of tumor genomic profiling is rapidly outpacing our ability to appropriately synthesize all the information in order to optimally refine patient ***,clinicians must continue to educate themselves regarding new tools and frameworks,and to utilize multidisciplinary team science,comprised of oncologists,geneticists,pathologists,biologists and bioinformaticians,to successfully implement this genomic approach therapeutically.

关键词： Gastric cancer Targeted therapy Biomarker Microarray Sequencing

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Muscular atrophy and weakness in the lower extremities in Behçet’s disease: A case report and review of literature

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World Journal of Clinical Cases 2021年第20期9卷 5647-5654页

作者： Koh-Woon Kim jae-Heung cho Department of Korean Medicine Rehabilitation College of Korean MedicineKyung Hee UniversitySeoul 02447South Korea

BACKGROUND In Behçet’s disease(BD),very few cases of muscular involvement have been reported *** natural history and therapeutic protocol for muscular involvement in BD are obscure due to the low incidence of peripheral neuropathy or myopathy in *** purpose of our study was to report a rare case of BD with chronic,focal forms of neuromyopathy and review the relevant *** SUMMARY We herein report the case of a 54-year-old man who presented with progressive muscular atrophy and weakness of both thighs 2 years after the presentation of the cardinal symptoms of *** past medical history,electrophysiological study,neurological examination,blood tests,magnetic resonance imaging study,and histological exam were performed for the differential *** literature on muscular involvement in BD was *** examination revealed that muscular involvement was predominantly localized in the proximal parts of the lower *** enhancement of several thigh muscles was observed on magnetic resonance imaging,which corresponded with the clinical *** study of one of the enhanced muscles showed denervation atrophy of the muscle with superimposed myopathic changes,while electrophysiological studies only suggested *** To our knowledge,this is the first case of neurogenic muscular atrophy with a specific set of clinical,radiological,electrophysiological,and histological findings reported in BD.

关键词： Behçet’s disease Muscular atrophy Muscular weakness Neuropathy Myopathy Case report

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