여행사에 있어 리더십 유형과 직무만족·조직몰입에 관한 연구

민양기,김판영 문화관광연구학회 2002 문화관광연구 Vol.4 No.3

The purpose of this study is to identify what kind of leadership styles on travel agency empirically. Also described are the relationship between these leadership styles and the job satisfaction, the organizational commitment of employee. Leadership is divided into two categories(transactional leadership and transformational leadership). Transformational leadership was more deeply analyzed and the empirical analysis was conducted to apply into the service industry. But we have some other results. In conclusion, there is no leadership style which could be applied in every condition and all kind of leadership should be applied case by case.

2단 평행기구 머니퓰레이터 해석

이민기,정판규 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

A double parallel manipulator has only two or three links in each parallel mechanism so that we expect larger workspace than that of a Stewart platform. To prove this property, this paper finds the workspace of a double parallel manipulator and compare it with that of a Stewart platform. The workspace of the double parallel manipulator is decoupled by a positional and an orientational parts. The posititional workspace is constructed by the first parallel mechanism while the orientational workspace is generated by the second parallel mechanism. These spaces are obtained from maximum to minimum lengths of linear actuators. We compute an unreachable workspace due to link interferences and limited ranges of passive joints and exclude it from the above workspace. The results show volume of workspace in a cartesian space and angular ranges of end effector in yaw and pitch motions.

AR 파라메타의 강인한 추정방법과 음성향상을 위한 적용

하판봉,이기용 國立 昌原大學校 産業技術硏究所 1992 産技硏論文集 Vol.6 No.-

기존 선형예측방법은 성도특성을 추정하는데 두가지의 주요한 문제점(음원의 특성에 의한 추정의 정확도, 가산배경잡음에 의한 추정정확도의 감소)을 가지고 있다. 이러한 문제를 다음과 같이 해결한다: 첫째, 구동잡음이 가우시안과 라프라시안의 혼합으로 본 강인한 AR모델을 사용하여 성도의 파라메타를 구한다. 이때, 잡음이 없는 환경에서 얻어진 음성신호를 이용한다. 두번째로는 위의 방법과 강인한 Kalman 필터를 사용하는 방법을 제안하고, 잡음에 오염된 음성을 향상시키기 위하여 사용하였다.

만성 정신분열병 환자에서 지연성 운동장애와 음성증상 및 인지기능 장애와의 연관성

심주철,반철식,성기수,이정구,정도운,정청,윤진상,김영훈 대한신경정신의학회 2000 신경정신의학 Vol.39 No.4

연구목적: 정신과 전문병원에 입원해 있는 만성정신분열병 환자들을 대상으로 첫째 지연성 운동장애의 유병율과 위험인자들을 조사하고, 둘째 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성을 조사하고자 한다. 방법: 연구대상자는 마산동서병원에 입원 중인 환자 중 DSM-IV의 정신분열별 진단기준에 부합하며, 최근 3개월 이상 동일 용량의 항정신병약물 복용한 271명(남자 174명, 여자 97명)의 환자들이었다. 지연성 운동장애에 대한 평가는 Abnormal Involuntary Movement Scale(AIMS)을 이용하였고, DSM-IV와 Sc-hooler와 Kane(1982)의 진단기준 양자에 부합하는 환자들만을 지연성 운동장애군으로 분류하였다, 정신 분열병 정신병리에 대한 평가는 Brief Psychiatric Rating Scale(BPRS)와 Schedule for the Deficit Syndrome(SDS)을 이용하였고, 인지기능에 대한 평가는 Mini-Mental Status Examination(MMSE)을 이용하였다. 결과: 지연성 운동장애의 유병율은 50.9%이었고, 50세 이상, 남자에서 높았다. 그러나 입원기간과 항정신병 약물의 일일 사용량에 따른 차이는 없었다. 지연성 운동장애의 호발부위는 혀, 상지, 입술과 입 주위의 순이었다. BPRS 총점 및 소항목 척도점수와 SDS 척도점수는 지연성 운동장애의 유무에 따른 차이가 없었다. MMSE 총점 및 소항목 점수도 지연성 운동장애의 유무에 따른 차이가 없었다. 결론: 평균입원기간이 9년 이상인 만성정신분열병 환자들에게서의 지연성 운동장애의 유병율은 50.5%이었고, 연령이 가장 의미있는 위험인자임을 확인했다. 만성정신분열병 환자들이 주 대상인 본 연구에서는 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성은 입증하지 못했다. Objectives: The purpose of present study was to determine the prevalence rate of tardive dyskinesia and to search for its risk factors in chronically institutionalized schizophrenic subjects. We also examined the relationship between tardive dyskinesia and both negative symptoms and cognitive impairments in the same subjects. Methods: Subjects were 271 in-patients(174 males, 97 females) at Masan Dongsuh Hospital. They met DSM-IV criteria for schizophrenia and had been taking fixed doses of antipsychotics for at least 3 months. Tardive dyskinesia was assessed by Abnormal Involuntary Movement Scale(AIMS). Cases of tardive dyskinesia were ascertained by the criteria of Schooler and Kane (1982) and DSM-IV. The rating of psychopathology was acquired using Brief Psychiatric Rating Scale(BPRS) and Schedule for the Deficit Syndrome(SDS) and the assessment of cognitive function using Mini-Mental State Examination(MMSE). Results: The prevalence of tardive dyskinesia is 50.9% and the frequency of tardive dyskinesia was high est in male above the age of fifty. But there was no statistically significant relationship between the frequency of tardive dyskinesia and both the length of hospitalization and the daily dose of antipsychotics. The frequency order of abnormal movement in the patients with tardive dyskinesia was as follows : tongue, upper extremities, lips and perioral area. We couldn't find any significant difference in the total and subscale scores of BPRS between the groups with and without tardive dyskinesia. There were no differences in MMSE scores between the groups with and without tardive dyskinesia. Conclusion: This study gave us that the prevalence of tardive dyskinesia was high in chronically institutionalized schizophrenic inpatients and that age was the most significant risk factor of tardive dyskinesia. The relationship between tardive dyskinesia and both negative symptoms and cognitive impairment, however, was not revealed.

교량 바닥판 보수공사에서 발생하는 콘크리트 폐수처리 방안

이봉학,최판길,김정기 江原大學校 産業技術硏究所 2008 産業技術硏究 Vol.28 No.A

As of 2003, construction waste has been produced at the level of 130,614.8 tons/day, in which the amount of waste concrete was 92,639.1 tons/day and accounted for about 66.4% of the amount of construction waste. Waste concrete is mainly produced in construction work and civil engineering work. Especially, road surface crushing method using a large amount of water requires thorough management of concrete wastewater. The aim of this study was to analyze water pollution due to concrete wastewater generated in repair of bridge deck using road surface crushing equipment and to suggest reasonable countermeasures for solve the problem. In this study, it was surveyed current conditions of produced concrete wastewater in bridge deck repair, analyzed physical features of concrete wastewater, expected effects of water pollution on inflow rivers if it is not treated, established treatment plan of water pollution by categories, and calculated capacity of each treatment process and required amount of necessary chemicals. As a result of sampling wastewater generated in field sites and testing it at a lab scale, it was revealed that the original wastewater was produced in removing concrete from bridge deck slabs using surface crushing equipment whose pH was 12.53, CODMn was 12.910mg/L, SS was 547.0mg/L, and other heavy metals were included in extremely small quantities.

폐경전후 여성에 있어서 혈장 지질농도변화와 골밀도 비교

강완석,장판기,정기령,이은희 한국건강관리협회 1999 건협 Report Vol.2 No.-

충남대학교 공업기술 계열 교사 연수 프로그램에 대한 만족도 분석

류창열,최유현,김판욱,김기수,김태훈,이창훈 忠南大學校 工業敎育硏究所 2005 論文集 Vol.27 No.1

The purpose of this study was to analyze the educated teachers' satisfaction of the in-service education programs of industrial technical and technology teachers in Chungnam National University. This study was carried out through survey to accomplish the purpose. The number of questionnaires collected was 86. This study used the SPSS program to conduct a descriptive analysis of the data. The results of this study were as follows: (1) The satisfaction about 'teachers' participation', 'utilization of audiovisual materials and instruments' and 'level of professor and lecture' was relatively high. (2) The satisfaction about 'environments of in-service education programs', 'evaluation of achievement', and 'efficacy of lectures' was relatively low.

Efficient monolithic projection method with staggered time discretization for natural convection problems

Pan, Xiaomin,Kim, Ki-Ha,Choi, Jung-Il Elsevier 2019 INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER - Vol.144 No.-

<P><B>Abstract</B></P> <P>For a more efficient algorithm, we introduce staggered time discretization to improve the previous method (Pan et al., 2017), fully decoupled monolithic projection method with one Poisson equation (FDMPM-1P), to solve time-dependent natural convection problems. The momentum and energy equations are discretized using the Crank–Nicolson scheme at the staggered time grids, in which temperature and pressure fields are evaluated at half-integer time levels ( n + 1 2 ), while the velocity fields are evaluated at integer time levels ( n + 1 ). Numerical simulations of two-dimensional (2D) Rayleigh–Bénard convection show that the proposed method is more computationally efficient and stable than FDMPM-1P, while preserving the second-order spatial and temporal accuracy. Further, the proposed method provides accurate predictions of 2D Rayleigh–Bénard convection under different thermal boundary conditions for a Rayleigh number up to <SUP> 10 10 </SUP> , three-dimensional turbulent Rayleigh–Bénard convection in the range of 1 × <SUP> 10 5 </SUP> – 2 × <SUP> 10 7 </SUP> in horizontal periodic domain, and three-dimensional turbulent Rayleigh–Bénard convection in the range of 1 × <SUP> 10 6 </SUP> – 1 × <SUP> 10 7 </SUP> in bounded domain. Finally, we theoretically confirmed that the proposed method is second-order in time and it is more stable than FDMPM-1P for small <I>Ra</I>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We propose VDMPM-STD by improving FDMPM-1P using staggered time discretization. </LI> <LI> The VDMPM-STD allows an explicit decoupling of momentum and energy equations. </LI> <LI> The VDMPM-STD is computationally efficient with the second-order accuracy. </LI> <LI> The VDMPM-STD provides accurate predictions of 2D and 3D RBC problems. </LI> </UL> </P>

The Effect of Solid Fraction on the Casting Formability in Vertical Type Squeeze Casting Process

Pan Ki Seo,Sung Man Sohn,Chung Gil Kang 한국주조공학회 2008 한국주조공학회지 Vol.28 No.1

이차 미분 맥파의 변곡점 분포를 이용한 특징점 추출 알고리즘

김판기(Pan-Ki Kim),안창범(Chang-Beom Ahn) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7

본 논문은 이차 미분 맥파(SDPTG, Second Derivation of Photoplethysmogram)를 측정하여 이차 미분 맥파의 5개의 특징점을 검출하는 방법에 대한 내용을 기술한다. 본 논문에서는 측정된 신호의 신호대 잡음비(SNR)을 높이는 방법과 기존의 미분을 이용한 변곡점 추출의 한계적인 부분, 그리고 본 논문에서 제안하는 이차 미분 맥파의 특징점의 분포를 이용한 특징점 추출 알고리즘에 대해서 설명한다.