국내 감자바이러스 Y (PVY) 저항성 육성 계통에서 분리한 PVY Mutant의 특성

김재현,금완수,이신호,김정수,전용호,정석훈,정열영,박용학,Kim, Jae-Hyun,Kuem, Wan-Soo,Lee, Sin-Ho,Kim, Jeong-Soo,Jeon, Yong-Ho,Jung, Suk-Hun,Chung, Youl-Young,Park, Yong-Hack 한국연초학회 2006 한국연초학회지 Vol.28 No.2

A mutant of Potato vims Y (PVY) was occurred in PVY resistance flue-cured tobacco breeding line KF0402 $(TC1146{\times}KF117)$ showing vein necrosis at Suwon in Korea. This isolate, PVY-SWM, was differentiated from other PVY based on biological properties and nucleotide sequence analyses of coat protein gene. PVY-SWM caused typical symptoms on 21 indicator plants as compared to the PVY-TOJC37. Remarkably, the PVY-SWM induced distinctly different symptom of systemic vein necrosis on tobacco cultivars V.SCR, PBD6, TN86, TN90, Virgin A Mutant (VAM), Wislica, NC744, KB108 and KB111, which were reported to have the recessive potyvirus resistance gene va. In RT-PCR assays with specific primers for detection of PVY, a single band of about 800bp in length was produced. The amplified DNA was cloned and the nucleotide sequence was determined. The coat protein gene of PVY-SWM showed 88.4%-99.0% and 92.5%-98.5% identities to the 12 different PVY isolates of Genbank Database at the nucleotide and amino acidi respectively. Multiple alignments as well as cluster dendrograms of PVY-SWM isolate revealed close phylogenetic relationship to the $PVY^{NTN}$ subgroup.

무선 센서네트워크에서 동적 예비 클러스터 헤드를 이용한 효율적인 토폴로지 관리 방안에 관한 연구

김재현,이재용,김석규,도윤미,박노성,Kim Jae-Hyun,Lee Jai-Yong,Kim Seog-Gyu,Doh Yoon-Mee,Park No-Seong 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.6B

무선 애드 혹/센서 네트워크에서 제안된 일반적인 클러스터링 기반의 계층적 토폴로지 관리 기법들은 빈번한 토폴로지 변화에 따라 자주 클러스터링을 재구성하게 되고 네트워크 관리에 필요한 오버헤드가 증가하게 된다. 본 논문에서는 이러한 재클러스터링 문제와 부하 분산을 위하여 동적 예비 클러스터 헤드 기법을 사용하는 멀티 흡클러스터링 알고리즘을 제안한다. 제안하는 기법은 이동성과 전원 레벨로 구성된 가중치 맵을 사용하여 예비 클러스터 헤드를 선출하고 멀티 홉 클러스터를 구성한다. 클러스터 헤드는 이러한 가중치 맵과 임계값을 사용하여 헤드의 역할을 예비 클러스터 헤드에게 넘겨주게 된다. 실험결과, 제안하는 알고리즘이 네트워크의 오버헤드를 줄이고 부하 분산을 제공하며, 토폴로지 변화에 무관하게 적절한 클러스터와 멤버를 관리할 수 있음을 확인하였다. As the topology frequently varies, more cluster reconstructing is needed and also management overheads increase in the wireless ad hoc/sensor networks. In this paper, we propose a multi-hop clustering algorithm for wireless sensor network topology management using dynamic pre-clusterhead scheme to solve cluster reconstruction and load balancing problems. The proposed scheme uses weight map that is composed with power level and mobility, to choose pre-clusterhead and construct multi-hop cluster. A clusterhead has a weight map and threshold to hand over functions of clusterhead to pre-clusterhead. As a result of simulation, our algorithm can reduce overheads and provide more load balancing well. Moreover, our scheme can maintain the proper number of clusters and cluster members regardless of topology changes.

어깨 안정화운동과 복부 안정화 운동에 의한 전방머리자세 성인의 머리척추각도와 어깨뼈 정렬 변화

김재현,이민형,Kim, Jae-Hyun,Rhee, Min-Hyung 대한고유수용성신경근촉진법학회 2021 PNF and Movement Vol.19 No.2

Purpose: This study aimed to adjust the craniovertebral angle and shoulder alignment through shoulder and abdominal stabilization exercises in adults with a forward head posture. Methods: The study participants were 29 adults with a forward head posture, and they were randomly divided into the following groups: 14 participants in a combined exercise group that used shoulder and abdominal stabilization exercises and 15 participants in a shoulder exercise group that used just shoulder stabilization exercises. The participants performed the stabilization exercises for 30 minutes per day, three times a week for five weeks. Results: There were significant differences in the craniovertebral angle after intervention in the shoulder stabilization exercise group (p < 0.05). There were significant differences in the craniovertebral angle and location of the right root of the spine and both inferior angles before and after intervention in the shoulder and abdominal stabilization exercise group (p < 0.05). There was a significant difference in the location of the right root of the spine and the left inferior angle between the groups at the post-test (p < 0.05), and there was a larger change in the shoulder and abdominal stabilization exercise group. Conclusion: There was a significant difference in the craniovertebral angle and a partially significant difference in shoulder alignment before and after intervention in both groups.

고등학교 공통과학 학습을 위한 멀티미디어 자료 구축

김재현,이희복,김현섭,김희수,박종욱,박현주,Kim, Jae Hyun,Lee, Hee Bok,Kim, Hyun Sub,Kim, Hee Soo,Park, Jeong Wok,Park, Hyun Ju 대한화학회 2000 대한화학회지 Vol.44 No.3

This study was designed to develop learning materials of multimediafor general science instruction of high school.this learning material was made of HTML record for each middle unit according to the general science curriculum, and was included a variety of Ietter, graph, picture, drawing, animation, and other moving image materials. And it was composed five coursewares:Content, Dictionary, Science Story,lmage Material, and Questions.The learning material is uploaded an internet website under Science Education Research Institute of Kongju National University (http://science.kongju.ac.kr), and also is provided to a CD-ROM title. 본 연구는 고등학교 공통과학 학습을 위한 멀티미디어 자료를 구축하는데그 목적을 두었다.공통과학 교육과정을 기초로 하여 문자 자료, 도표, 그림, 사진, 애니메이션, 동영상 및 음성 자료 등을 HTML 사용하여 멀티미디어 학습 자료를 개발하였다. 멀티미디어 학습 자료의 구성은 내용, 용어사전, 과학이야기, 영상자료, 그리고 질문의 다섯 분야로 나뉜다. 개발된 멀티미디어 자료는 공주대학교 과학교육연구소 홈페이지 (http://science.kongju.ac.kr)에 올려놓았으며, 또한 CR-ROM으로 제공된다.

레이저를 이용한 기울기 측정 장치 및 이의 제어 방법 개발

김재현,이성민,이기학,최우석,백승훈,Kim, Jae-Hyun,Lee, Seong-Min,Lee, Kihak,Choi, Woo-Suk,Baek, Seung-hoon 한국공간구조학회 2021 한국공간구조학회지 Vol.21 No.3

This study develops a new device system for measuring a slope of object with non-adhesive, non-contact and non-face-to-face, namely Inclinometer Slope Laser Measuring (ISLM), that is applicable in the field. This system includes cradle, laser, camera, and computer and the filming and is performed after laser projection at programmed intervals. After measuring the amount of displacement converted to numerical values, these values can then be transferred to the office using the selected data transmission method. The obtained results from the test carried out to verify the reliability of the ISLM system indicated that the ISLM system can measure with accurately level of 0.1mm/Pixel at 1m distance and when increasing the camera resolution, the precision might increase proportionally. Therefore, the proposed measure system may widely apply on-site for various constructions, especially, in the case of object with very high surface temperature where exhibits difficulty to directly measure the adjacent structures. However, due to the sensitive reaction to the illuminance, this method can be applied with caution at times of large changes in illuminance, such as at dawn and at dusk.

영산강 하구지역 점토의 침하특성 고찰

김재현,김동범,이현웅,박성수,Kim, Jae-Hyun,Kim, Dong-Beom,Lee, Hyun-Wung,Park, Sung-Su (사)한국토질및기초기술사회 2006 기술발표회 Vol.2006 No.-

영산강 하구지역은 현재 신도시개발이 한창 진행되고 있으며, 연약한 해성퇴적층이 15~25cm로 존재하고 있다. 연약지반 개량설계는 불교란시료를 채취하고 각종 실내시험을 통하여 지반의 토질정수를 결정한다. 본 고찰은 압밀관련 지반정수인 선행압밀하중(Pc), 압축지수(Cc), 재압축지수(Cr)를 재해석하기 위해 침하계측 결과를 이용 실내시험의 압밀 곡선과 비교 분석하였다.

전이성 대장암에서 표적치료와 면역치료

김재현,박선자,Jae Hyun Kim,Seun Ja Park 대한소화기암연구학회 2018 Journal of digestive cancer reports Vol.6 No.2

Colorectal cancer (CRC) is the third most common cause of cancer-related death in the world. Although the long-term outcome of patients with metastatic CRC is still poor, target therapy including anti EGFR agents and anti VEGF agents and immunotherapy including anti PD-1 antibody and anti CTLA-4 antibody have shown clinical benefits in the treatment of patient with metastatic CRC. In the future, the personalized treatment strategy based on the clinical characteristics and biologic features of patients with metastatic CRC will be necessary. In this review, we summarized the mechanisms and clinical evidences of target therapy and immunotherapy, and the guideline of clinical practice in patients with metastatic CRC.

소아 변비의 한약 치료에 대한 최신 임상연구 동향 - 중국 RCT 연구를 중심으로 -

김재현,박용석,이지홍,장규태,Kim, Jae Hyun,Park, Yong Seok,Lee, Jihong,Chang, Gyu Tae 대한한방소아과학회 2020 대한한방소아과학회지 Vol.34 No.4

Objectives The purpose of this study is to analyze the trends of recent clinical studies on the effect of herbal medicine for pediatric constipation in China, and to evaluate the efficacy and safety of herbal medication treatment for pediatric constipation. Methods The authors searched the clinical studies using China National Knowledge Infrastructure (CNKI) published from January 2016 to June 2020. We analyzed the literature in regards to focusing on the treatment methods and results. Results A total of 29 randomized controlled trials were selected and analyzed. In all the those studies, the total effective rate of herbal medicine treatment group in pediatric constipation was significantly higher than those of the control group. The most commonly used herbs for pediatric constipation were Atractylodis Rhizoma Alba (白朮) followed by Aurantii Immaturus Fructus (枳實), Glycyrrhizae Radix (甘草), Semen Cannabis (火麻仁), Raphani Semen (萊菔子). The recurrence rate of the herbal medicine treatment group was significantly lower than those of control group. In most studies, the adverse events from the herbal medicine treatment group were significantly less than those of the control group. Conclusions Based on the results of the analyzed clinical studies, herbal medicine treatment has been shown to be safe and effective in the treatment of pediatric constipation. Additional clinical studies are needed to solidify these findings.

노인의 보행에 대한 평가 도구의 신뢰도와 타당도 조사 연구

김재현,Kim, Jae-Hyun 대한물리치료학회 2009 대한물리치료학회지 Vol.21 No.1

Purpose: The examine the Reliability and Validity of the modified Emory Functional Ambulation Profile (mEFAP), Tinetti. Gait (TG), Timed Up & Go Tes t (TUG), Comfortable Gait Speed (CGS), Berg Balance Scale (BBS) in assessing gait function and balance in elderly person. Methods: The 45 community-dwelling subjects were participated in this study. Reliability was determined by intra-class correlation coefficient (ICC$_{3,1}$), Bland and Altman method (Standard Error of Measurement (SEM), Smallest Real Difference (SRD)). Results: Validity was examined by correlation the mEFAP, TG, TUG, CGS, BBS. The intra-rater reliability were High (ICC$_{3,1}$ : mEFAP=0.95, TG=0.96, TUG=0.94, CGS=0.96, BBS=0.92) and Absolute reliability were excellent (SEM: mEFAP=1.90, TG=0.21, TUG=0.28 CGS=0.25, BBS=0.52), (SRD: mEFAP=5.26, TG=0.58, TUG=0.77, CGS=0.69, BBS=1.44). There were significant correlations between assessment tool (r=.0.58$\sim$0.78, p<0.01) indicating good validity. Our results provide strong evidence that the assessment tool has good reliability, validity for assessing elderly person undergoing rehabilitation. Conclusion: The gait assessment tool is a useful scale for measuring walking function and recovery in elderly person.

마이크로웨이브 수신기용 광대역 RF 증폭기 설계 및 제작

김재현,윤인섭,고민호,박효달,Kim, Jae-Hyun,Yoon, In-Seop,Go, Min-Ho,Park, Hyo-Dal 한국전자통신학회 2015 한국전자통신학회 논문지 Vol.10 No.6

본 논문은 마이크로웨이브 수신기 구성을 위한 광대역 RF 증폭기를 설계 및 제작하였다. 제안한 광대역 RF 증폭기는 수신된 신호의 안정적인 증폭을 위하여 소스단자에 연결되는 비아까지 EM설계를 하였으며, 능동소자의 소오스(Source) 측이 이상적인 접지(GND)로 동작함에 따라 발진하는 요소를 최소화 하여 광대역에서 일정한 이득 특성 및 안정적인 증폭특성을 얻도록 하였다. 상용 GaAs FET를 사용하고, 광대역 마이크로웨이브 수신기의 IF 주파수 대역인 720 MHz, 4,595 MHz와 6,035 MHz에서 동작하도록 입력 및 출력 정합회로를 구성하였다. 제작 및 측정결과 500 MHz ~ 7 GHz의 광대역 특성을 나타내었으며, 전압이득은 737.5 MHz에서 6.0575 GHz까지 10.635 dB ~ 13.129 dB, 기본파와 제2차 고조파 사이에서 20 dBc 이상의 고조파 억압특성을 나타내었다. In this paper, We proposed a broadband RF amplifier for Microwave band receiver. We also proposed a broadband RF amplifier, designed by using EM simulation for reliable amplification of the received signal. Connected to a source terminal to via, it minimizes those which are the active elements of source-side oscillation as the operating element in an ideal GND, and a constant gain characteristic in a broadband. The goal of this was to obtain stable amplification characteristics. For implementing this architecture, we designed the broadband(500 MHz ~ 7 GHz) RF amplifier by using commercial GaAs FET, which operate on 720 MHz, 4,595 MHz, and 6,035 MHz by impedance matching. The voltage gain is 10.635 dB ~ 14.407 dB(737.5 MHz ~ 6.0575 GHz), P1dB is 20 dBc of band(1st harmonic/2nd harmonic).