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- 저자 : 梁東雲 (검색결과 21 건)
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양동운,소철호,이종규,이종오,조승일 한국물리학회 2007 새물리 Vol.55 No.6
ZnS nanoparticles were synthesized by using an ultrasonic sonochemistry method for six different sonication times. The physical structure and surface chemistry of the nanoparticles were characterized by using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The particle sizes obtained from XRD pattern ranged from 3.6 to 4.7 nm at four different sonication times. The photoluminescence emission (PLE) spectroscopy was used to measure the optical properties. The rate of change of Zn-C was significantly correlated with changes in the sizes of the nanoparticles and with the PL intensity. To provide an understanding of the sonication process, we discus the characteristics of ZnS nanoparticles and their dependence on the sonication time. 음향화학법을 이용하여 ZnS 나노입자를 초음파 조사시간 (2$-$12시간)을 변화시켜서 합성하였다. 합성된 ZnS 나노입자의 물리적 구조와 표면의 화학적인 특성을 XRD와 XPS를 이용하여 평가하였다. 음향화학법에 의해 합성된 ZnS의 평균 입자크기는 약 4 nm였고, 초음파를 10시간 이상 조사한 경우 약 3.4 nm 정도의 나노입자를 합성할 수 있었다. PL (photoluminescence)을 이용한 광학적 특성에서 PL세기는 초음파 조사시간이 10시간인 경우 최대였고, ZnS의 표면에 C-Zn 결합에서 C 함량에 거의 비례함을 알 수 있었다.
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梁東雲 서강전문대학 1993 論文集 Vol.12 No.-
The dynamics of interactive behavior at individual, interpersonal, group, and the resulting conflict, play an increasingly important role in the analysis and study of organizational behavior. Conflict at the intraindividual level involves goal conflict, frustration, and role conflict. Frustration occurs when goal-directed behavior is blocked. Goal conflict can come about from approach-approach, approach-avoidance, or avoidance-avoidance situations. Role conflict results from a clash in the expectations of the various roles possed by an individual. Interpersonal conflict was examined within the frameworks of transactional analysis and Johari window styles and of the three major strategies of interpersonal conflict resolution. Next, intergroup conflict was examined from many aspects. Traditionally, the management of organizational conflict was based on simplistic assumptions. Formal authority and classical restructing were used in attempts to eliminate it. The more modern approach is to assume the inevitabbility of conflict, recognize that it is not always bad for the organization, and try to manage it effectively rather than merely try to eliminate it.
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敎授의 自我槪念과 行動이 學生의 自我慨念과 學業成就에 미치는 影響에 關한 硏究
양동운 서강정보대학 2001 論文集 Vol.20 No.-
This paper aims at the development of the theoretical model on the self-concept between professor and student. Propositions are as follows. 1. The self concept of the professor will effect on the behavior of the professor. 2. The behavior of the professor will effect on the self concept of students. 3. The self concept of students will effect on the academic performance.
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梁東雲 서강정보대학 1992 論文集 Vol.11 No.-
Stress is one of the most important and serious problems facing the field of organizational behavior. Defined as an adaptive response to an external situation that results in physical, psychological, and/or behavioral deviations for organizational participants, stress was first studied in terms of Selye's general adaptation syndrome. The three stages of GAS are alarm, resistance, and exhaustion. Since this beginning, which concentrated mainly on the physiological dimensions of stress, attention has also shifted to the psychological and behavioral dimensions. The causes of stress can be categorized into extraorganizational, organizational, group, and individual stressors. In combination or singly, they represent a tremendous amount of potential stress impinging upon today's jobholder-at every level and in every type of organization. The effects of such stress can create physical problems (heart disease, ulcers,arthritis, and maybe even cancer), psychological problems (mood changes, lowered self-esteem, resentment of supervision, inability to make decisions, and job dissatisfaction), and/or behavioral problems (tardiness, absenteeism, turnover, and accidents). A number of individual and organizational strategies have been developed to cope with these stress-induced problems.Exercise, relaxation, behavioral self-control techniques, cognitive therapy techniques, and networking are some potentially useful coping strategies that individuals can apply to help combat existing stress. Taking a more proactive approach, management of organizations could create a more supportive climate, enrich tasks, reduce conflict and clarify roles, and set up a systematic career planning and development program. Whether on an individual or an organizational level, steps need to be taken to prevent or reduce job stress.
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FRP 박스부재의 결함평가를 위한 위상배열초음파 적용성 평가
곽계환,양동운,김호선,이호현,윤국현,Kwak, Kae-Hwan,Yang, Dong-Woon,Kim, Ho-Sun,Lee, Ho-Hyun,Yun, Kuk-Hyun 한국농공학회 2010 한국농공학회논문집 Vol.52 No.5
The structural material with the highest possibility of new materials that will be used in the future construction field is fiber reinforced polymer. The current studies on FRP members by using such excellent material characteristics mostly focused on stability, composite problem, and durability of FRP members. The initially constructed FRP members secure excellent stability and durability compared to reinforced concrete and steel materials, but measures for defections during the periodical inspection, methods for detecting breakages, and maintenance and reinforcement are not insufficient. Accordingly, this study proposed a measurement system using the FRP sensor to evaluate the safety of the FRP modular box member, and applied the phased array ultrasonic technique to detect the defects and damage likely to occur during the performance period.
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이성행,양동운,함형길,공보성,신동욱,Lee, Seong-Haeng,Yang, Dong-Woon,Hahm, Hyung-Gil,Kong, Bo-Sung,Shin, Dong-Wook 한국농공학회 2012 한국농공학회논문집 Vol.54 No.3
Dynamic characteristic of lift gate supported by plane truss is studied by a model test scaled with the ratio of 1 : 31.25 in the four major rivers project. The vibrations of gate supported by the plane truss is assessed in comparison with those of gate supported by the space truss which was tested formerly. The gate model is made of acryl panel and calibrated by lead. A model test is conducted under the different gate opening and upstream water levels conditions in the concrete test flume dimensioned 1.6 m in width, 0.8 m in height and 24 m in length. In order to verify the model, natural frequencies of the model gate are measured, and compared with the numerical results. The vibrations of gate model supported by the plane truss in opening height of 1.0 cm~2.0 cm shows greater than one supported by the space truss. It is found that the gate model supported by the plane truss is less desirable than one supported by the space truss. thus, the latter type of gate model is requested to design.
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