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포용적 리더십이 발언행동에 미치는 영향: 심리적 안전감의 매개효과와 동료 체념적 침묵 인지의 조절효과
서우형,노명화,이지영 리더십학회 2019 리더십연구 Vol.10 No.4
In this study, we used the previous research analysis on voice behavior and found that the inclusive leadership and psychological safety were the independent variables and the parameters. Particularly, the effect of inclusive leadership on the voice behavior of the members based on the social exchange theory and the expectation theory among the leading variables of the voice behavior was investigated. Finally, the relationship between the inclusive leadership and the psychological safety. And the negative effect of the acquiescent silence of other people on the voice behaviors was assumed. To validate this research model, a questionnaire survey was conducted on the leaders and members of the Air Force Education Unit. A total of 162 pairs were tested. The results of this study showed that inclusive leadership had a positive effect on psychological safety and voice behavior, and psychological safety also had a positive effect on the members' voice behavior. Psychological safety also showed a positive mediating effect on the relationship between inclusive leadership and voice behavior. However, unlike the hypothesis, it was confirmed that the companion 's attitude silent awareness showed a positive(+) moderating effect. Therefore, this study discussed the theoretical and practical implications and limitations and future research methods. Key words: Inclusive Leadership, Psychological Safety, Voice Behavior, Acquiescent. Silence 본 연구는 공군 교육부대에서 근무하고 있는 리더와 구성원을 대상으로 포용적 리더십이 발언행동에 미치는 영향에서 심리적 안전감의 매개효과와 동료 체념적 침묵 인지의 조절효과를 실증적으로 검증하였다. 특히, 본 연구는 포용적 리더십이 심리적 안전감을 매개로 발언행동에 미치는영향에 있어 동료의 체념적 침묵을 인지하는 정도가 어떠한 조절효과가 있는지에 주목하여 살펴보고자 하였다. 연구 분석 결과, 포용적 리더십은 심리적 안전감, 발언행동에 정적인 영향을 미쳤으며, 심리적 안전감 또한 구성원의 발언행동에 정적인 영향을 보였다. 특히 심리적 안전감은 포용적리더십과 발언행동 간의 관계에서 정적인 부분 매개효과를 나타냈다. 그러나 동료의 체념적 침묵을 높게 인지하면 포용적 리더십이 높은 상황에서 발언행동이 많이 이루어지지지 않을 것이라는예상과 다르게 동료의 체념적 침묵을 인지하면 발언행동이 더 이루어지는 것으로 나타났다. 마지막으로, 본 연구에서는 이론적, 실무적 시사점 및 한계점과 향후 연구방안을 논의하였다. 키워드: 포용적 리더십, 발언행동, 심리적 안전감, 체념적 침묵
SIMULINK를 이용한 Fractional-N 주파수합성기의 모델링 기법
김인정,서우형,안진오,김대정 대한전자공학회 2007 電子工學會論文誌-SD (Semiconductor and devices) Vol.44 No.4
본 논문은 최근에 많이 연구되고 있는 PLL 기반의 fractional-N 주파수 합성기에 관하여 SIMULINK 및 Verilog-a를 사용하여 모델링하는 방법론에 대하여 설명한다. 전통적으로 PLL 설계에 적용되는 바텀-업(bottom-up) 방식의 트랜지스터 레벨 설계와 함께 탑-다운(top-down) 방식의 설계를 병행하여 적용함으로써 트랜지스터 레벨의 회로설계에 걸리는 시간을 크게 절약하고 SoC의 IP로서 아날로그 부분과 디지털부분이 같이 검증될 수 있는 방안을 고려하고자 한다. 이를 위하여 시스템의 동작여부를 빠르게 파악하고 top level에서의 검증이 용이한 SIMULINK 모델링과 트랜지스터 레벨과의 호환을 통해 블록 단위의 검증이 가능한 Verilog-a 모델링의 비교를 수행함으로서 효과적인 설계 방법을 제시한다. This paper presents behavioral models using SIMULINK and Verilog-a for a PLL based fractional-N frequency synthesizer. By adopting a top-down approach along with the traditional bottom-up transistor level design in parallel, the design time is greatly shortened, and a co-verification method for both the digital and the analog part is considered. Under this consideration, the SIMULINK modeling reduces simulation time and easily estimates the PLL's performance on the top level. Verilog-a is able to verify the feasibility of each blocks at first hand because it is compatible with transister level circuits. Then, an efficient way of the design is presented by comparing the results of both models.
갑상선 유두암 환자에서 경부 림프절 재발에 대한 최소 갑상선외 침습의 임상적 중요성
황성배(Seong-Bae Hwang),류우상(Woo-Sang Ryu),서우형(U-Hyoung Seo),이재복(Jea-Bok Lee),배정원(Jung-Won Bae),구범환(Bum-Hwan Koo) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.73 No.5
Purpose: Extra-thyroidal extension has been recognized as a poor prognostic factor for increased regional recurrence risk in papillary thyroid carcinoma, and is known to require treatment that is more aggressive. In the recent UICC TNM 6th Classification, an extra-thyroidal extension was divided into a minimal extra-thyroidal extension (T3) and a massive extra-thyroidal extension (T4). The aim of this study was to investigate the clinical effect of a minimal extra-thyroidal extension of a papillary carcinoma for the recurrence of regional cervical lymph nodes. Methods: We retrospectively studied 154 patients with papillary thyroid carcinoma where a thyroidectomy was performed from Feb. 2003 to May. 2006 at the Department of Surgery, with the exclusion of 6 patients with a massive extra-thyroidal extension. We divided the cases into a no extra-thyroidal extension group and a minimal extra-thyroidal extension group according to the grading of the extra-thyroidal extension. The grading of the extra-thyroidal extension was based on both pathological findings and intraoperative surgical findings. Clinicopathological factors associated with each group were analyzed by univariate and multivariate analysis. We divided the cases into two groups according to age (<45 yrs, ≥45 yrs) and lymph node status (positive, negative), and compared each group with regards to disease free survival according to the grading of the extra-thyroidal extension. Results: By univariate analysis, a minimal extra-thyroidal extension was related to lymph node metastasis, tumor size, mutifocality (P<0.05), and was not related to cervical lymph node recurrence statistically (P=0.108). Cervical lymph node recurrence was related to being male, lymph node metastasis and tumor size (P<0.05). By multivariate analysis, a minimal extra-thyroidal extension was independently related to tumor size, multifocality, and lymph node metastasis (P<0.05). In both groups with regards to age and lymph node status, a minimal extra-thyroidal extension was not statistically related to disease free survival (P>0.05). Conclusion: We need to downstage to less than T3 for a minimal extra-thyroidal extension because there is no significant difference in disease free survival according to the grading of an extra-thyroidal extension in patients with papillary thyroid carcinoma.
반복적인 투침으로 인해 인조혈관과 자가 정맥 사이에 발생한 의인성 동정맥루 환자들에서의 임상적 특징
최상태(Sang Tae Choi),김건국(Keon Kuk Kim),이운기(Woon Ki Lee),이정남(Jung Nam Lee),강진모(Jin Mo Kang),백정흠(Jeong-Heum Baek),이원석(Won Suk Lee),서우형(Woo Hyung Seo) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.1
Purpose: Failure of hemodialysis access is the main medical problem in chronic renal failure patients. This resulted from complications such as thrombosis, infection, pseudoaneurysm, steal syndrome and so on. This study was undertaken in an attempt to describe the clinical characteristics and significances of dialysis failure due to iatrogenic fistula between prosthetic graft and native vein at puncture site. Methods: During 5 years between Feb. 2005 and Feb. 2009, five Iatrogenic fistulas were identified in a retrospective review of 133 patients performed 220 times fistulography due to dialysis failure in PTFE (polytetrafluoroethylene) graft. Results: Overall incidence is 3.8 % in PTFE graft cases. Mean age is 50 (28~75) years, male to female ratio 2:3. Median 1st patency period is 20 months (6~36). All iatrogenic fistula is usually located in not venous but arterial limb of forearm loop, combined with the stenosis in venous limb and anastomosis site. More than 70% venous anastmotic stenosis in 4 cases (80%) and diffuse stenosis of venous limb in 3 cases (60%), revised concomitantly either by patch angioplasty or ballooning. Medial follow-up period is 8 months (5~12), graft occlusion occurred in one case. Conclusion: All iatrogenic fistula usually occurs in not venous but arterial limb of forearm loop graft. Most iatrogenic fistula is combined with the stenosis in venous limb and anastomosis sites, must be revised concomitantly either by patch angioplasty or ballooning. Close assessment to superficial vein and graft is needed for early detection. Fistulography is the most useful diagnostic tool. Careful cannulation method is required to prevent the occurrence of iatrogenic fistula in chronic renal failure patients.