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조철호(Cho, Cheol-ho),최현빈(Choi, Hyunbin) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
It"s been over 60 years since the Korean war. As time goes on, North and South are changing. The man who experienced Korean war got old or passed away. This generation who have never experienced the war and heard about before are living in this land. They don"t feel the need to unify north and south and they are living under the belief which the peaceful life last forever. However, is it alright to live like this? In this project, Emotions which experienced Korean war and lived hard through the period of recovery give a shape and make a space. Seeing these spaces meditate the past and give a time which understand rightly the present to visitor. Futhermore, The present we face. have an optional alternative plan about future and the space warn the future which not far out of the past.
Tensile and Microstructural Characteristics of Fe-24Mn Steel Welds for Cryogenic Applications
Myeonghwan Choi,Junghoon Lee,Hyunbin Nam,강남현,김명현,Daewon Cho 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.2
Herein, we investigated the weldability and relationship between microstructure and tensile properties in 24 wt% Mn steelwelds and, specifcally, submerged arc welds (SAWs) were produced using these welds for cryogenic applications. The basemetal (BM) and weld metal (WM) exhibited a stacking fault energy (SFE) that maintained a stable austenite phase for 27.1and 17.0 mJ/m2, respectively. Deformation twins were observed after tensile testing of the BM and WM at 298 K. Weld metals using undermatched fllers showed a lower SFE and coarser grain size (~ 86 μm) compared to that of the BM (~ 12 μm). Therefore, the tensile testing at 110 K produced deformation twins and ε-martensite. The formation of ε-martensite withdeformation twins antedated necking during tensile testing and elongation decreased at 110 K. However, the SAWs of highMn steels maintained excellent low-temperature mechanical properties such as elongation, tensile strength, and yield strengthwith values of 20%, 1150 MPa, and 617 MPa, respectively.
Sang-yun Yang,Yonggun Park,Hyunwoo Chung,Hyunbin Kim,Se-yeong Park,In-gyu Choi,Ohkyung Kwon,Kyu-chae Cho,Hwanmyeong Yeo 한국목재공학회 2017 목재공학 Vol.45 No.4
Research on the rapid and accurate prediction of physical properties of wood using near-infrared (NIR) spectroscopy has attracted recent attention. In this study, partial least squares analysis was performed between NIR spectra and air-dried specific gravity of five domestic conifer species including larch (Larix kaempferi), Korean pine (Pinus koraiensis), red pine (Pinus densiflora), cedar (Cryptomeria japonica), and cypress (Chamaecyparis obtusa). Fifty different lumbers per species were purchased from the five National Forestry Cooperative Federations of Korea. The air-dried specific gravity of 100 knot- and defect-free specimens of each species was determined by NIR spectroscopy in the range of 680-2500 nm. Spectral data preprocessing including standard normal variate, detrend and forward first derivative (gap size = 8, smoothing = 8) were applied to all the NIR spectra of the specimens. Partial least squares analysis including cross-validation (five groups) was performed with the air-dried specific gravity and NIR spectra. When the performance of the regression model was expressed as R<sup>2</sup> (coefficient of determination) and root mean square error of calibration (RMSEC), R<sup>2</sup> and RMSEC were 0.63 and 0.027 for larch, 0.68 and 0.033 for Korean pine, 0.62 and 0.033 for red pine, 0.76 and 0.022 for cedar, and 0.79 and 0.027 for cypress, respectively. For the calibration model, which contained all species in this study, the R<sup>2</sup> was 0.75 and the RMSEC was 0.37.
Jung Kyeongmin,Yoon Joohyun,Ahn Yeeun,Kim Soyeon,Shim Injeong,Ko Hyunwoong,Jung Sang-Hyuk,Kim Jaeyoung,Kim Hyejin,Lee Dong June,Cha Soojin,Lee Hyewon,Kim Beomsu,Cho Min Young,Cho Hyunbin,Kim Dan Say,K 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
Irritability is a heritable core mental trait associated with several psychiatric illnesses. However, the genomic basis of irritability is unclear. Therefore, this study aimed to 1) identify the genetic variants associated with irritability and investigate the associated biological pathways, genes, and tissues as well as single-nucleotide polymorphism (SNP)-based heritability; 2) explore the relationships between irritability and various traits, including psychiatric disorders; and 3) identify additional and shared genetic variants for irritability and psychiatric disorders. We conducted a genome-wide association study (GWAS) using 379,506 European samples (105,975 cases and 273,531 controls) from the UK Biobank. We utilized various post-GWAS analyses, including linkage disequilibrium score regression, the bivariate causal mixture model (MiXeR), and conditional and conjunctional false discovery rate approaches. This GWAS identified 15 independent loci associated with irritability; the total SNP heritability estimate was 4.19%. Genetic correlations with psychiatric disorders were most pronounced for major depressive disorder (MDD) and bipolar II disorder (BD II). MiXeR analysis revealed polygenic overlap with schizophrenia (SCZ), bipolar I disorder (BD I), and MDD. Conditional false discovery rate analyses identified additional loci associated with SCZ (number [n] of additional SNPs = 105), BD I (n = 54), MDD (n = 107), and irritability (n = 157). Conjunctional false discovery rate analyses identified 85, 41, and 198 shared loci between irritability and SCZ, BD I, and MDD, respectively. Multiple genetic loci were associated with irritability and three main psychiatric disorders. Given that irritability is a cross-disorder trait, these findings may help to elucidate the genomics of psychiatric disorders.
군병원에서 수술중 신경생리검사장비 운용의 경험 및 유용성에 대한 연구
윤상훈 ( Sang Hoon Yoon ),함정식 ( Jeong-sik Ham ),박호영 ( Ho-young Park ),이건영 ( Gunyoung Lee ),정재환 ( Jaehwan Chung ),조현준 ( Hyun Jun Jo ),김현빈 ( Hyunbin Kim ),김새롬 ( Sae Rom Kim ),조병규 ( Byung-kyu Cho ) 국군의무사령부 2016 대한군진의학학술지 Vol.47 No.1
Objectives; The authors aimed to introduce the clinical experience and efficacy using intraoperative neurophysiologic monitoring (IONM) system for neurological surgery from January 2015 to August 2016 in Armed Forces Capital Hospital. Methods; Retrospective observational study was performed. This system was used in 17 operations above the periods. Every operation and monitoring result were reviewed in electronic medical records. Three patients with brain lesions (1 AVM, 2 brain tumor) underwent surgical resection with IONM. Two brain tumor were a facial schwannoma and a frontal neuronal tumor. Fourteen spinal operations consisted with nine benign degenerative compressive lesions, two neurogenic tumor, a intramedullary cavernous hemangioma, two neurogenic tumors, a vertebral fracture and tumor. IONM was tailored to the single patient, and consisted in transcranial MEP monitoring, cortical MEP monitoring, SSEP monitoring and direct electrical stimulation. Results; None of patients suffered from permanent motor deficits; a patient had a transient peripheral type facial nerve palsy requiring rehabilitation. None of the patients had intraoperative seizures and postoperative IONM related complication. Seven cases (41.2%) met the criteria of neurophysiologic changes during operation. Of these, six cases were restored to normal during operation spontaneously or with surgical manipulation. An unrestored neurophysiologic cases showed new post-operative neurological deficits (peripheral type facial palsy; H-B grade 4). No patients showed neurological deficits without any changes in IONM. Conclusions; Proper application of IONM may be useful to detect intraoperative neurological injury during all neurosurgical operations and improve surgical outcomes especially in subgroup of invasive brain surgery. Larger series of patients are required to confirm this preliminary data. More expert clinical neurophysiologists and neurologists should be recruited to enlarge opportunity to perform surgery under IONM for patient’s safety and good surgical outcome.