• 한국의류학회지
• /
• 제22권6호
• /
• pp.706-715
• /
• 1998

The Purpose of this study was to investigate the effects of maternity apparel style and job type on the likability and the occupational competence of pregnant working women. This study was 3'S factorial design. Independent variables of this study were maternity apparel style(feminine style, neutral style, and masculine style) and job type(assitant manager of bank and salesperson). Dependent variables were the likability and the occupational competence of the stimuli. One hundred eighty college females participated in the study, in which half of the subject viewed the stimuli as a salesperson and the other half as an assistant manager of bank. The results showed that maternity apparel style influenced the perception of likability(F(2,174)=6.97, p<.001) and occupational competence(F(2,174): 16.25, p<.001) significantly. Also lob type influenced the occupational competence(F(1,174) : 3.94, p<.05) signifcantly. There was a significant interaction(F(2,174) : 2.53 p(.10) between maternity apparel style and job type. In future researches, diverse job distinction other than the classification of being professional or non-being professional can be arranged to study the influence of job type. Also it is recommended to explore the interaction between the appearance cues except clothing and job type.

• 태양에너지
• /
• 제20권3호
• /
• pp.75-84
• /
• 2000

The purpose of this research is to study on the heat transfer characteristics of separate type heat pipe with a rotor. The heat transfer characteristics of the rotor condenser are various on input heat of evaporator, rotational speeds of rotor, and working fluid amount. The results obtained from the study are as follows. 1. Magnetic fluid using seal of the rotor operated in stability by a variation of temperature and rotation speeds. The configuration of magnetic fluid seal assembly was adequate. 2. Steam ejector is effective in recovering working fluid condensate in the rotor. When steam ejector is operating, the heat flux of working fluid does not change, with the wall temperature in the rotor. 3. The optimum design conditions on working fluid amount and rotational speeds are effective in evaporator volume 50%, rotational speeds 200rpm, 300rpm, and operating temperature $80^{\circ}C$. With working fluid amount increasing, overall heat transfer coefficient decreases linearly.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2002년도 추계학술대회 논문집
• /
• pp.1015-1018
• /
• 2002

Recently, many studies have been undergoing to reduce a working time in a field of machine tool. There are two ways of reducing a working time; to reduce an actual working time by heighten a speed of spindle and to reduce a stand-by time by shortening a tool exchanging time. ATC(Automatic Tool changer) belongs to the latter case. Fixed address type ATC that is being developed ill this study can store more number of tool in small space than magazine transfer type ATC relatively as well as shorten tool exchanging time. In this study, a simplified equivalent model of finite element method in order to analyze structure of fixed address type ATC.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2003년도 춘계학술대회논문집
• /
• pp.1134-1139
• /
• 2003

Vibration problems are an intrinsic characteristic in a washing machine owing to rotation working mechanism. Therefore, a right comprehension of working principle and the analysis on dynamic behavior of a washing machine is essential to design anti-vibration or vibration reduction. In this paper, we choose two kinds of a washing machine: a suspension type pulsator/drum type washing machine. Each the structure and working principle of a washing machine is discussed briefly and the dynamic behavior of it is investigated, then, the vibration detection problems of transient or excessive vibration is tented in each category. Some vibration experimented results in a washing machine are presented also.

• 가정간호학회지
• /
• 제24권1호
• /
• pp.69-78
• /
• 2017

Purpose: The purpose of this study was to identify the frequency and duration of primary health practitioners' work, and their job satisfaction, and to confirm differences in work and job satisfaction by type of primary health care post. Methods: Work frequency, duration of work, and job satisfaction were estimated by 371 primary health practitioners. Chi-square test and t-test were used to identify the differences in working patterns and job satisfaction by type of primary health care post. Results: Primary health practitioners were found to spend more time working with the elderly population than with students, pregnant women, children, people with disabilities, and multicultural families. Those in costal areas were more concerned with students than those working inland. In the latter group of practitioners, more time was spent working with patients with chronic diseases, pregnant women, women, children, multicultural families, and mental health clients. Also, the job satisfaction of inland primary health practitioners was significantly higher than that of costal practitioners. Conclusion: It is necessary to identify the characteristics of primary health practitioners' work, focusing on changes in the medical service environment. Furthermore, it is necessary to provide job training according to type of primary health care post, as practitioners' approaches should differ between posts.

• 한국직업건강간호학회지
• /
• 제29권4호
• /
• pp.316-324
• /
• 2020

Purpose: This study aimed to identify differences in physical working environments, psychosocial working environments, and health outcomes according to the employment type of delivery workers. Methods: This study was a secondary analysis of data collected from the Fifth Korean Working Conditions Survey (KWCS). Participants were 84 Korean delivery workers. Data were analyzed using the SAS 9.4 Version, χ² test and Fisher's exact test. Results: Statistically significant differences were found according to the employment type of delivery workers (special types, wage) including "noise", "vibrations", "repetitive movements", "supervisor support", "colleague support", "manuals on emotional expression", "existence of trade union, works council or similar body". Conclusion: This study suggests the necessity of improving the working environment and health outcomes of delivery workers belonging to special employment types. In developing these, the laws and systems must be reorganized to enable the recognition of delivery workers as wage workers. In addition, delivery companies should be held responsible for managing delivery workers.

• 수산해양기술연구
• /
• 제52권3호
• /
• pp.257-262
• /
• 2016

Flexible two-phase thermosyphons are devices that can transfer large amounts of heat flux with boiling and condensation of working fluid resulting from small temperature differences. A flexible two-phase thermosyphon consists of a evaporator, an insulation unit, and a condenser. The working fluid inside the evaporator is evaporated by heating the evaporator in the lower part of the flexible two-phase thermosyphon and the evaporated steam rises to the condenser in the upper part to transfer heat in response to the cooling fluid outside the tube. The resultant condensed working fluid flows downward along the inside surface of the tube due to gravity. These processes form a cycle. Using R134a refrigerant as the working fluid of a loop type flexible two-phase thermosyphon heat exchanger, an experiment was conducted to analyse changes in boiling heat transfer performances according to differences in the temperature of the oil for heating of the evaporator, the temperature variations of the refrigerant, and the mass flows. According to the results of the present study, the circulation rate of the refrigerant increased and the pressure in the evaporator also increased proportionally as the temperature of the oil in the evaporator increased. In addition, the heat transfer rate of the boiler increased as the temperature of the oil in the evaporator increased.

• 한국초전도ㆍ저온공학회논문지
• /
• 제14권3호
• /
• pp.48-52
• /
• 2012

This paper describes experimental study on the orientation dependence of GM-type pulse tube refrigerator with helium and neon as working gas. A pulse tube refrigerator generates refrigeration work with gas expansion by gas displacer in the pulse tube. The pulse tube is only filled with working gas and there exists secondary flow due to large temperature difference between cold-end and warm-end. The stability of secondary flow is affected by orientation of cold-head and thus cooling performance is deteriorated by gas mixing due to secondary flow. In this study, a single stage GM-type pulse tube with orifice valve as a phase control device is fabricated and tested. The fabricated pulse tube refrigerator is tested with two different working gases of helium and neon. First, optimal valve opening and operating frequency are determined with experimental results of no-load test. And then, the variation of no-load temperature as orientation angle of cold-head is measured for two different working gases. Effect of orientation dependence of cold-head as working gas is discussed with experimental results.

• 한국산업융합학회 논문집
• /
• 제21권2호
• /
• pp.53-62
• /
• 2018

This study propose a new approach to control the optimal working path of vertical type articulated robot with translation joint for trimming working process automation in forging manufacturing process. The basic structure of the proposed robotic joints controller consists of a Proportional-Intergral controller and a Proportional-Derivative controller in parallel. The proposed control scheme takes advantage of the properties of the fuzzy PID controllers. The proposed method is suitable to control of the trajectory and path control in cartesian space for vertical type articulated robot manipulator. The results illustrates that the proposed fuzzy computed torque controller is more stable and robust than the conventional computed torque controller. The reliability is varified by simulation test for vertical type s articulated robot with seven joints including one trqanslation joint.

• 대한안전경영과학회지
• /
• 제14권4호
• /
• pp.137-145
• /
• 2012

This study was planned to analyze the effect of the types of employment on work-related injury experience. The types of employment may have influenced on working conditions including the exposure to risk factors. Korean Working Conditions Survey have collected the various working conditions as household survey with structured questionnaire. The probability of work-related injury of self-employed is more than that of regular worker. But there is no difference of probability of work-related injury experience between regular and irregular worker controlled by general characteristics and the exposure to risk factors. Authors have found that the type of employment have indirect effect on work-related injury experience via the exposure to risk factors. The result of this study may be heuristic one because of data limitation as cross sectional survey data. In future, well designed survey data can evaluate the effect of the type of employment on safety and health status.