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Kyeongha Kwon,Jonghyeok Yoon,Hyeon-Min Bae IEEE 2015 IEEE journal of solid-state circuits Vol.50 No.2
<P>This paper presents the design of a 6 Gb/s transceiver with a nonlinear electronic dispersion compensator (EDC) for a directly modulated distributed-feedback (DM-DFB) laser. At the laser output, a DM-DFB laser induces power-dependent frequency chirp, which causes severe chromatic dispersion as well as pattern dependency on the received signal. Such time-varying nature of the dispersion increases the difficulty of compensation using conventional linear methods. The proposed EDC overcomes the chirp-induced dispersion via a nonlinear equalizer at the receiver and a pattern-dependent pre-compensator at the transmitter. The EDC achieves an optical SNR gain of 14.69 dB at a BER of 1 ×10 <SUP>- 6</SUP> in a 75 km SMF-28 fiber. The test chip is fabricated in a 90 nm CMOS process, and the EDC consumes 68 mW from a 1 V supply at 6 Gb/s.</P>
The Impact of Job Satisfaction and Social Support on Overturn Intention among Long-Term Care Workers
Lim Hyun Sung,Lee Jonghyeok,Yoon Tae Gyeong,Kim Jong Sook,Juang Han Chea,Kim Jun Kyoung 한국통합사례관리학회 2018 한국케어매니지먼트연구 Vol.0 No.29
본 연구의 목적은 요양보호사의 직업만족도와 사회적 지지가 이직의도에 미치는 영향을 연구하고자 하였다. 연구목적을 달성하기 위하여 2017년 10월부터 2018년 2월까지 요양보호사 373명을 대상으로 수집한 설문자료를 분석하였다. 본 연구의 통계는 티 검증과 변량분석, 다중회귀분석을 통해 분석하였다. 연구결과, 직업만족 수준이 높을 경우, 수퍼바이저의 사회적지지 수준이 높을수록 이직의도가 낮은 것으로 나타났다. 또한, 대학을 졸업하고 6개월 미만의 요양보호사 일수록 이직의도가 낮은 것으로 조사 되었다. 그리고 재직기간, 직업만족, 수퍼 바이저의 사회적 지지는 요양보호사의 이직의도에 통계적으로 유의한 영향력을 미치는 것으로 확인되었다. 이 연구결과를 통하여 사회복지 실천적 및 정책적 함의에 대한 제언을 하였다. The Purpose of this research study is to find the impact of job satisfaction and social support on overturn intention among long-term care workers. For this purpose, the sample was comprised of 373 long-term care workers from October 1 st in 2017 to February in 2017. T-test and Anova, and multiple regression were used to analysis the data. This research study indicated that long-term care workers who were a high level of job satisfaction and social support from supervisor had a high mean score on turnover intention. Participants who finished university and who worked less six than months had a high mean score in turnover intentions than others. Also, working year, job satisfaction, and supervisor’s social support were significant predictors for overturn intention among long-term care workers. Based on this research result, the implications of social work practice and social policy are discussed..
박영진(YoungJin Park),윤종혁(JongHyeok Yoon),김영갑(YoungGab Kim),이원호(WaonHo Yi) 대한공간정보학회 2009 한국공간정보학회 학술대회 Vol.2009 No.9
과거 방재정책의 패러다임이 대응ㆍ복구 중심의 소극적 재난관리였다면, 최근 들어 위험요인을 사전에 발견하고 피해를 최소화 하는 예방ㆍ대비 중심의 적극적 재난관리로의 전환을 요구하는 방재정책의 뉴패러다임에 대한 목소리가 높다. 또한 지구온난화에 따른 기후변화 등으로 과거와 전혀 다른 피해규모의 양상을 띠고 있는 가운데, 본 연구에서는 이러한 새로운 재난유형에 대한 재난관리의 접근방식을 전국 지자체별로 설치ㆍ운영하고 있는 재난관리용 CCTV를 활용하여 기존의 재난관리방식을 고도화하고 적극적 재난관리방안을 모색하고자 하였다. 특히, 본 연구에서는 현재 소방방재청에서 역점 추진 중인 『재난영상정보 통합ㆍ연계 시스템 구축』과 관련한 사업내용과 통합된 CCTV영상정보를 지능형 영상감지기술을 적용하여 재난유형별로 위험상황을 감지, 판독, 분석, 표출하도록 하는 자동위험알림기능의 가능성에 대한 기초연구에 관한 내용을 소개하고자 한다.
Daejung Yang,Yongseon Lee,Jonghyeok Yoon 대한스포츠물리치료학회 2022 정형스포츠물리치료학회지 Vol.18 No.1
Purpose: This study were investigated the effect of robot-assisted arm therapy on the arm function, gait and lung capacity in stroke patients. Methods: The study participants were selected 20 stroke patients who met the selection criteria. 10 people in the robot-assisted arm therapy group and 10 people in the task-oriented arm therapy group were randomly assigned. The experimental group performed robot-assisted arm therapy and the control group performed task-oriented arm therapy for 6 weeks, 5 days a week, 30 minutes a day. The measurement tools included Fugl-Meyer assessment of upper extremity(FMA-UE) and gait analysis system and spirometry. Data were analyzed using independent sample t-test and the paired sample t-test. Results: The results of comparing Fugl-Meyer assessment of upper extremity (FMA-UE) before and after the intervention within the group, both the experimental group and the control group were a significant difference in upper extremity item score and Fugl-Meyer assessment total score (p<.01), as a result of comparing Fugl-Meyer assessment of upper extremity (FMA-UE) after intervention between the groups, the experimental group were a significant difference only in the upper extremity item score compared to the control group (p<.05). When comparing the gait before and after intervention within the group, both the experimental group and the control group were a significant differences in temporo-spatial variables and 10 m walking (p<.001). When comparing the gait after intervention between the groups, the experimental group were a significant differences in temporo-spatial variables and 10 m walking compared to the control group (p<.05). When comparing the lung capacity before and after the intervention between the groups, the experimental group were a significant difference only in peak expiratory flow (PEF) (p<.05). Conclusion: Through this study it were confirmed that robot-assisted arm therapy applied to stroke patients for 6 weeks significantly improved function of the arm, gait and lung capacity. Based on these results, it is thought that robot-assisted arm therapy can be used as a useful treatment in clinical practice to improve the kinematic variables in chronic stroke patients.
Identifying Needs and Wishes for Redesigning an air purifier
Minjung Cho,Jiwon Han,DongHyeok Yoo,Jinjae Park,Jonghyeok Yoon,Chajung Kim 한국HCI학회 2018 한국HCI학회 학술대회 Vol.2018 No.1
The study was designed to find wishes and needs of single households about air purifier through three experiments (Narration test, Focus group interview, Collage making). A total of 4 males and 1 female college students were employed as subjects for the experiment. All of the subjects had a small residential living experience, and the use of air purifiers did not affect the recruitment of subjects. Experimental results show that overall UI usability problems and size related issues are mainly revealed. Also, the results showed that subjects were most desirous of air cleaners with harmonious design and natural feeling of freshness.
Yang, Yoosoo,Oh, Jung-Mi,Heo, Paul,Shin, Jae Yoon,Kong, Byoungjae,Shin, Jonghyeok,Lee, Ji-Chun,Oh, Jeong Su,Park, Kye Won,Lee, Choong Hwan,Shin, Yeon-Kyun,Kweon, Dae-Hyuk Biochemical Society 2013 The Biochemical journal Vol.450 No.3
<P>Anti-allergic effects of dietary polyphenols were extensively studied in numerous allergic disease models, but the molecular mechanisms of anti-allergic effects by polyphenols remain poorly understood. In the present study, we show that the release of granular cargo molecules, contained in distinct subsets of granules of mast cells, is specifically mediated by two sets of SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, and that various polyphenols differentially inhibit the formation of those SNARE complexes. Expression analysis of RBL-2H3 cells for 11 SNARE genes and a lipid mixing assay of 24 possible combinations of reconstituted SNAREs indicated that the only two active SNARE complexes involved in mast cell degranulation are Syn (syntaxin) 4/SNAP (23 kDa synaptosome-associated protein)-23/VAMP (vesicle-associated membrane protein) 2 and Syn4/SNAP-23/VAMP8. Various polyphenols selectively or commonly interfered with ternary complex formation of these two SNARE complexes, thereby stopping membrane fusion between granules and plasma membrane. This led to the differential effect of polyphenols on degranulation of three distinct subsets of granules. These results suggest the possibility that formation of a variety of SNARE complexes in numerous cell types is controlled by polyphenols which, in turn, might regulate corresponding membrane trafficking.</P>