젊은 성인에서 신체 만족도에 따른 문제해결양식, 대인관계문제와 우울증상과 자살사고와의 관련성

차승민,김태성,강문희,권명진,김정란,왕성근,지익성 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:The aim of this study was to evaluate that problem solving styles, interpersonal problems, depression and suicidal ideation according to body image satisfaction. Methods:One hundred and nineteen young healthy normal subjects filled out administered the Body Dysmorphic Disorder Examination-Self Report (Korean version of BDDE-SR K-BDDE-SR), Problem Solving Style Scale(Korean version PSS), Korean Inventory of Interpersonal Problem(KIIP), Korean version of the Depression Anxiety Stress Scale(KDASS-21), Korean version of Beck Scale for Suicidal Ideation(Korean version SSI) and Korean version of Reynolds Suicidal Ideation Questionnaire(Korean version SIQ) for a month. Results:Out of the 119 subjects, 39%(N=46) was male and 61%(N=73) was female. In high K-BDDE-SR group (higher than 67), helplessness was significantly higher than low K-BDDE-SR group(lower than 67), and problem-solving confidence, creative style, approach style were significantly lower than low K-BDDE-SR group. Also, Higher level of all KIIP factors in High K-BDDE-SR group was significantly differ than low K-BDDE-SR group. In High K-BDDE-SR group, K-DASS-21, SSI, and SIQ were significantly higher than low K-BDDE-SR group. Using multiple regression analysis contributing variance toward the total factor score of K-BDDE-SR of participants were K-DASS-21 and SIQ. Conclusion:Our results indicates that high tendency of dissatisfied body images have differences in helplessness, problem-solving confidence, approach style, interpersonal problems, depression and suicidal ideation compared to low tendency of dissatisfied body images. It is necessary to study body dysmorphic disorder patients group in the future.

前腕部 經穴 取穴에서 骨度分寸法과 一夫法의 比較 硏究

박히준,채윤병,차웅석,박종배,이혜정,이향숙,인창식,고형균,김수영,최일환,김강식,문정배,배기태,유경환,육근영,정병주,손인철,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

Background : The cun measurement System, an essential and convenient method in locating acupoints, has been widely used in the practice of acupuncture. However, traditional cun measurement has been criticized for its lack of reliability. Objectives : The purposes of this study are to determine if one cun measured by the directional methods have a consistency with that of proportional methods and to investigate which factors are related with these differences, especially in forearm. Methods : The distance between the elbow crease and the wrist crease of forearm was compared to a reference value of one cun obtained by the directional method. In this method, one cun is one third of the distance between index finger and Small finger of a subject, measured at proximal interphalangeal joint. In addition, to investigate the factors influencing the differences between these two methods, we measured the height and body weight and calculated body mass index (BMI). Finally we analyzed the factors correlated with these lengths by linear regression test. Results : The results showed that one cun obtained by the directional methods were significantly different from one cun by the proportional methods in forearm. It was demonstrated that the length acquired with the directional method was more correlated with body weight and body mass index, while the length obtained by the proportional method was more correlated with the height.

Solar, fuel, and battery cell-based small-scale hybrid power systems for long-term environmental monitoring using wireless sensors

Jeong Keun Cha,김수형 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.7

To provide stable energy for environmental sensors, we design a small-scale hybrid power system (SS-HPS) comprising a silicone-based solar cell (SC), polymer electrolyte membrane-based fuel cell (FC), and lithium-polymer-based battery cell (BC). An environmental sensor system (ESS), with a minimum power requirement of ~500 mW, is operated using the SS-HPS. The SC provides sufficient power to the ESS when the sunlight intensity is higher than 300-400 W/m 2 . However, when the sunlight is insufficient under rainy weather or at night, the ESS malfunctions from a lack of energy. When supplied with hydrogen gas, the FC provides energy stably to the ESS. The long-term operation of the ESS is examined for 60 days in indoor and outdoor areas. The ESS successfully performs environmental monitoring with the support of the SS-HPS. An optimized design of the SS-HPS would be beneficial for the longterm stable operation of the ESS and wireless data acquisition.

Au–Ag Core–Shell Nanoparticle Array by Block Copolymer Lithography for Synergistic Broadband Plasmonic Properties

Cha, Seung Keun,Mun, Jeong Ho,Chang, Taeyong,Kim, Sang Yun,Kim, Ju Young,Jin, Hyeong Min,Lee, Jeong Yong,Shin, Jonghwa,Kim, Kwang Ho,Kim, Sang Ouk American Chemical Society 2015 ACS NANO Vol.9 No.5

<P>Localized surface plasmon resonance of metallic nanostructures receives noticeable attention in photonics, electronics, catalysis, and so on. Core shell nanostructures are particularly attractive due to the versatile tunability of plasmonic properties along with the independent control of core size, shell thickness, and corresponding chemical composition, but they commonly suffer from difficult synthetic procedures. We present a reliable and controllable route to a highly ordered uniform Au@Ag core shell nanoparticle array via block copolymer lithography and subsequent seeded-shell growth. Size-tunable monodisperse Au nanodot arrays are generated by block copolymer self-assembly and are used as seed layers to grow Ag shells with variable thickness. The resultant Au@Ag core shell nanoparticle arrays exhibit widely tunable broadband enhancement of plasmonic resonance, greatly surpassing single-element nanoparticle or homogeneous alloy nanoparticle arrays. Surface-enhanced Raman scattering of the core shell nanoparticle arrays showed an enhancement factor greater than 270 from Au nanoparticle arrays.</P>

Self-Assembly of Complex Multimetal Nanostructures from Perforated Lamellar Block Copolymer Thin Films

Cha, Seung Keun,Lee, Gil Yong,Mun, Jeong Ho,Jin, Hyeong Min,Moon, Chang Yun,Kim, Jun Soo,Kim, Kwang Ho,Jeong, Seong-Jun,Kim, Sang Ouk American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.18

<P>We introduce a facile and effective fabrication of complex multimetallic nanostructures through block copolymer self-assembly. Two- and three-dimensional complex nanostructures, such as nanomesh, double-layered nanomeshes, and surface parallel cylinders on nanomesh, can be fabricated using the self-assembly of perforated lamellar morphology in block copolymer thin films. Simultaneous integration of various metallic elements, including Pt, Au, and Co, into the self-assembled morphologies generates multimetal complex nanostructures with highly interconnected morphology and a large surface. The resultant metal nanostructures with a large surface area, robust electrical connectivity, and well-defined alloy composition demonstrate a high-performance electrochemical catalysis for hydrogen evolution reaction (current density: 6.27 mA/cm(2)@0.1 V and Tafel slope: 43 mV/dec).</P>

Monodisperse Pattern Nanoalloying for Synergistic Intermetallic Catalysis

Mun, Jeong Ho,Chang, Yun Hee,Shin, Dong Ok,Yoon, Jong Moon,Choi, Dong Sung,Lee, Kyung-Min,Kim, Ju Young,Cha, Seung Keun,Lee, Jeong Yong,Jeong, Jong-Ryul,Kim, Yong-Hyun,Kim, Sang Ouk American Chemical Society 2013 Nano letters Vol.13 No.11

<P>Nanoscale alloys attract enormous research attentions in catalysis, magnetics, plasmonics and so on. Along with multicomponent synergy, quantum confinement and extreme large surface area of nanoalloys offer novel material properties, precisely and broadly tunable with chemical composition and nanoscale dimension. Despite substantial progress of nanoalloy synthesis, the randomized positional arrangement and dimensional/compositional inhomogeneity of nanoalloys remain significant technological challenges for advanced applications. Here we present a generalized route to synthesize single-crystalline intermetallic nanoalloy arrays with dimensional and compositional uniformity via self-assembly. Specific electrostatic association of multiple ionic metal complexes within self-assembled nanodomains of block copolymers generated patterned monodisperse bimetallic/trimetallic nanoalloy arrays consisting of various elements, including Au, Co, Fe, Pd, and Pt. The precise controllability of size, composition, and intermetallic crystalline structure of nanoalloys facilitated tailored synergistic properties, such as accelerated catalytic growth of vertical carbon nanotubes from Fe–Co nanoalloy arrays.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2013/nalefd.2013.13.issue-11/nl403542h/production/images/medium/nl-2013-03542h_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl403542h'>ACS Electronic Supporting Info</A></P>

태양광/연료전지 하이브리드 발전 및 배터리 저장 시스템 기반 센서 구동 및 환경 모니터링 연구

차정근(Jeong Keun Cha),김수형(Soo Hyung Kim) 한국신재생에너지학회 2020 한국신재생에너지학회 학술대회논문집 Vol.2020 No.8

Investigation of morphological characteristics and pollen germination in Senna tora

Jin-Tae Jeong,Seon-Woo Cha,Bo-Keun Ha 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

Senna tora (L.) Roxb. belongs to Leguminosae and its seeds are usually roasted and boiled in water to produce tea in Korea. Also the plants are well known for the treatment of Hypertension, Hepatitis, Constipation and Conjunctivitis. This study was conducted to investigate the morphological characteristics and pollen germination rates of Senna tora with the aim of genetic mapping of this species. First, we investigated morphological characteristics of domestic and international genotypes containing 51 lines in Korea and 2 lines in China. No significant differences in growth characteristics were observed among 53 genotypes. However, ST-9 line which was collected in Pyung-chang showed high growth rate at the early stage. The flower of Senna tora consists of 5 petals, 10 surgeries (7 main surgeries, 3 small surgeries), 1 pistil, and 5 sepals. After bud emergence, each petal was white in 1-2 days, turn into ivory in a week, then yellow in 8-9 days and finally bloomed in 9-10 days. Although the average flowering times of the plants were July 24, ST9 flowered in July 12. In addition, the flowers of ST9 differed from the flowers of the other genotypes. Flower of ST9 joined together with one another. Therefore, ST9 showing high growth rate at the early stage and unique flowering characteristics was selected to as the paternal line for genetic mapping study. Second, we investigated pollen germination rates for each stage of flower development. Pollen started to germinate at the yellow bud stage and pollen germination rate was highest in the bloomed flower stage. This results show that self-fertilization hardly occurs when the flower is ivory bud stage, and there is no need to use young bud flowers for artificial crossing. This work is intended to serve as the basis for the breeding of new varieties in Senna tora.

Spin-orbit torque properties of W-V alloy based magnetic heterostructures

Jeong Kyu Lee,Gyu Won Kim,Taehyun Kim,Min Hyeok Lee,In Ho Cha,Jiung Cho,Young Keun Kim 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.2

β-W is considered the most promising transition metal due to its outstanding charge-to-spin conversion efficiency. Despite this exceptional property, alloys based on β-W as a spin current generating layer have been rarely studied due to their lack of phase stability. This study examines various properties of W-V alloy layers in W100-xVx (5)/CoFeB (2.5)/MgO (1)/Ta (2) magnetic heterostructures with different W-V compositions. Samples were sputtered onto thermally oxidized Si wafers under a base pressure below 5 × 10<SUP>-9</SUP> Torr. Diverse W100-xVx compositions were fabricated by changing sputtering power densities of W and V targets during co-deposition. X-ray diffraction verified the existence of β-W up to a V content of 20 at%. It also confirmed that Co-V alloys are formed when V content exceeded 60 at%. Spin-orbit torque properties were analyzed by harmonics Hall measurement. Out of all the samples measured, the sample with W content of 80 at% and V of 20 at% showed the maximum damping-like torque efficiency of -0.45 ± 0.04. ξDL decreased drastically when V content exceeded 20 at% because phase transition from β-W to α-W occurred. We also fabricated heterostructures of W (5)/CoFeB (0.9)/MgO (1)/Ta (2) and W80V20 (5)/CoFeB (0.9)/MgO (1)/Ta (2) to obtain perpendicular magnetic anisotropy. These samples were used to acquire optical microscope images and determine switching current densities. We utilized Magneto-Optic Kerr Effect microscope to observe and obtain current-induced spin-orbit torque switching images for the W80V20 alloy-based sample. The change in the contrast of the images successfully depicted the magnetization switching of the ferromagnetic CoFeB layers. The switching current (current density) was 11 mA (2.2 × 10<SUP>7</SUP> A cm<SUP>-2</SUP>) and 6 mA (1.2 × 10<SUP>7</SUP> A cm<SUP>-2</SUP>) for β-W and W80V20, respectively. The switching current is clearly reduced when W80V20 is used instead of pristine W. We hope that this work will play as a key role in the field of spintronics in the future. 〈그림 본문참조〉

Chemo- and Bio-cascade Catalysis to Produce Plastic Monomers from Polyethylene Terephthalate

Jeong Chan JOO,Si Jae PARK,Kyoung Heon KIM,Dongyeop OH,Bong Keun SONG,Hyun Gil CHA,Bong Hyun SUNG,Young Joo YEON,Hee Taek KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.4