• Journal of Mechanical Science and Technology
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• 제20권4호
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• pp.455-466
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• 2006

This study was an attempt to control and monitor Computerized Numerical Controller (CNC) machines anywhere and anytime for the development of a ubiquitous machine (u-machine). With a Personal Digital Assistant (PDA) phone, the machine status and machining data of CNC machines can be monitored in wired and wireless environments, including the environments of IMT2000 and Wireless LAN. Moreover, CNC machines can be controlled anywhere and anytime. The concept of the anywhere-anytime controlling and monitoring of a manufacturing system was implemented in this study for the purpose of u-manufacturing and u-machines. In this concept, the communication between the CNC controller and the PDA phone was successfully performed anywhere and anytime for the real-time monitoring and control of CNC machines. In addition, the interface between the CNC controller and the developed application module was implemented by Object linking and embedding for Process Control (OPC) and shared CNC memory. For communication, the design of a server contents module within the target CNC was based on a TCP/IP. Furthermore, the client contents module within the PDA phone was designed with the aid of embedded c++ programming for mobile communication. For the interface, the monitoring data, such as the machine status, the machine running state, the name of the Numerical Control (NC) program, the alarm and the position of the stage axes, were acquired in real time from real machines with the aid of the OPC method and by sharing the CNC memory. The control data, such as the start, hold, emergency stop, reserved start and reserved stop, were also applied to the CNC domain of the real machine. CNC machines can therefore be controlled and monitored in real time, anywhere and anytime. Moreover, prompt notification from CNC machines to mobile phones, including cellular phones and PDA phones, can be automatically realized in emergencies.

• 한국의류학회지
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• 제15권3호
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• pp.251-262
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• 1991

The roles of fashion merchandisers (merchandise managers) in women's apparel industry and their perceptions of the job requirements as a fashion merchandiser were investigated to understand present fashion merchandising activities in the industry and suggest desirable roles of fashion merchandiser for further development of the industry. The research questionnaires were administered to fashion merchandisers working in the ten national brand women's apparel firms. The results of the study were as follows . 1. Annual sales volumes of most surveyed firms were more than five billions won and eight out of ten surveyed firms have fashion merchandisers in their firms. 2. Fashion merchandisers worked at a specific brand merchandising division sales and operations division or merchandise planning division. A fashion merchandiser generally supervised one brand. 3. Fashion merchandiser's work experience ranged from four to fifteen years showing a great deal of experience in the apparel industry. Their majors at university were mostly business and few majored in clothing and textiles, or textiles. 4. In general, the role of fashion merchandiser was a management specialist who was responsible for identifying target markets analyzing fashion trends, planning of the merchandise development budget planning, manufacturing planning, selling, advertising and sales promotion and distributing the merchandise. At some firms fashion merchandi-sers were not responsible for advertising, display, and receiving the orders. 5. Surveyed fashion merchandisers perceived the desirable fashion merchandiser's role as a management specialist conducting overall business activities in the areas of merchandise planning, manufacturing, selling and distribution. They also mentioned the following personal characteristics such as vision leadership, and persuasion as desirable characteri-stics for those who aspire to a career in fashion merchandising. 6. Surveyed fashion merchandisers emphasized relevant and realistic experiences in fashion merchandising education. Several ways were suggested to help the educator keep in touch with business and bring reality to students. They are . field work, bringing professionals into the classroom to speak to the students, emphasizing clothing and textiles education including merchandising area, and establishing a Department of Fashion Merchandising.

• 대한물리의학회지
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• 제14권4호
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• pp.173-181
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• 2019

PURPOSE: This study examined the necessity of a musculoskeletal injury-prevention program for automobile parts manufacturing workers by assessing the body composition, muscle strength, and posture according to sex and age. METHODS: Two hundred eighty-two workers (men, 218; women, 64; mean age, 38.97 years; and mean work tenure, 10.29 years) participated in this study. They completed a questionnaire on their general characteristics, excluding personal identification codes. The participants were evaluated for body composition, muscle strength, and posture using InBody, a hand dynamometer, and the Image J program through photography, respectively. An independent t-test and one-way analysis of the variance were used for the comparisons according to sex and age, respectively. RESULTS: Significant sex-related differences in muscle strength and grip force were observed (p<.05). In addition, the left-side pelvic inclination was significantly higher in the female participants than in the male participants (p<.05). Significant age-related differences in the skeletal muscle mass and muscle strength were observed around 40 years (p<.05). Significant correlations were observed among the body composition (skeletal muscle and body fat masses), muscle strength, and posture (pelvic inclination; p<.01). CONCLUSION: Significant differences in pelvic inclination by sex and muscle strength by age were found, even in healthy workers. Additional posture and muscle strength measurements will be needed for workers who participate in the musculoskeletal injury prevention program because they are exposed to an incorrect posture for many hours or in many repetitive tasks.

• 한국산학기술학회논문지
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• 제10권4호
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• pp.887-894
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• 2009

최근 조직의 성과평가 또는 개인의 성과평가를 위한 시스템이 많이 도입되고 있다. 특히 중소 제조업의 성과평가를 위한 BSC활용이 확산되고 있다. 그러나 성과평가시스템이 전문가에 의해 설계되고 구축되어야하지만 중소기업의 자금 부족으로 인해 소프트웨어 기업에서 판매하는 소프트웨어에 의존하여 실시하고 있다. 그렇지만 성과측정의 가장 중요한 것은 객관성이다. 따라서 효과적인 성과측정을 위해서는 측정하고자 하는 성과지표가 잘 설계되어야한다. 따라서 본 연구에서는 중소기업 중에서 제조업종을 영위하는 기업을 대상으로 성과평가를 하기위해 기준으로 삼을 수 있는 성과측정지표를 제시하였다. 연구 결과로 관리부서, 생산부서, 연구부서의 기준으로 제시되는 성과측정 지표가 매우 유효했음을 통계적으로 검증할 수 있었다.

• 한국산업보건학회지
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• 제23권4호
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• pp.356-366
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• 2013

Objectives: This study was conducted in order to evaluate $PM_{2.5}$ concentrations at 20 offices connected to the manufacturing industry from the beginning of September to the end of November 2012. Methods: A total of 20 samples were collected from 20 office buildings. Each $PM_{2.5}$ sample was collected by a 37 mm PTFE filter attached to a Personal Environment Monitor. Results: The geometric mean concentrations of $PM_{2.5}$ in the offices was $23.47{\mu}g/m^3$, and the mean $PM_{2.5}$ concentrations measured in smoking offices were much higher than those of measured in non-smoking offices($24.83{\mu}g/m^3$ and $21.55{\mu}g/m^3$, respectively). $PM_{2.5}$ was revealed to be higher in small offices($39.52{\mu}g/m^3$) than in medium or large offices($22.69{\mu}g/m^3$ and $11.04{\mu}g/m^3$, respectively). The mean $PM_{2.5}$ concentration of offices located on the 1st floor was higher than that of those on the 2nd floor, and those of offices located in the workplace were higher than those out of the workplace. The multiple regression model showed that concentration of $PM_{2.5}$ was positively associated with the method of ventilation. Conclusions: Smoking, ventilation method, location, and inflow of outdoor particulate matter are the most important factors for office $PM_{2.5}$ concentrations.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2602-2608
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• 2015

본 연구는 고춧가루의 HACCP(Hazard Analysis Critical Control Point) 시스템 적용에 필요한 미생물학적 위해 요소분석을 위한 목적으로 2014년 1월 10일~2014년 6월 13일까지 충주시 동량면 소재에 있는 용금농산에서 수행하였다. 고춧가루 제품의 모든 공정 단계들을 파악하여 공정흐름도를 작성하였고 미생물학적 위해를 제어할 수 있는 자외선살균공정에서 살균 시간을 변화시키면서 미생물의 변화를 시험한 결과 자외선 등 $20W{\times}12EA$, 살균 시간은 $63{\pm}3$초를 한계기준으로 결정하였다. 자외선살균 후에는 위해 미생물 검사 결과는 안전하나 제조환경과 작업자의 미생물 검사 결과 주기적인 세척 및 소독을 실시하여 미생물학적 위해를 감소시키고 작업자 위생교육 등을 통하여 개인위생을 준수해야 할 것으로 판단된다.

• 한국콘텐츠학회논문지
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• 제15권2호
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• pp.177-186
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• 2015

본 논문은 21세기에 접어들어 다품종 소량생산으로 변화하고 있는 추세에 맞추어 가구디자인 분야가 이바지 할 수 있는 방향성을 3D프린팅을 이용한 가구디자인 제작 사례를 분석함으로써 제시하는 것에 목적을 두고 있다. 본 논문은 3D 프린팅으로 제작된 가구 및 조명의 사례를 3가지 분류로 분석하였다. 첫째 3D프린팅 방식과 재료의 연관성에 따른 분류, 둘째 3D프린팅 가구디자인의 8가지 조형적 특징에 따른 분류, 셋째 실용성, 사용성, 내구성에 따른 기존 가구디자인과 3D 프린팅 가구 디자인의 경쟁력 비교분석이다. 본 연구를 통해 얻어진 가구디자인 분야에서 3D 프린팅 기술이 가져다주는 경쟁력은 다음과 같다. 첫째, 개인 취향에 맞춘 다품종 소량생산이 가능하다. 둘째, 디지털을 통한 가구의 전송, 운송이 편리해 졌다. 셋째, 가구디자인 생산에 변혁을 가져다준다. 넷째, 3D 프린팅과 사물인터넷의 융합을 통해 스마트가구디자인 분야로의 발전 가능성이 있다. 다섯째, 지속가능한 친환경 가구디자인이 용이해진다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.441-443
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• 2005

According as CCFL(Cold Cathode Fluorescent lamp) of light source in Backlight unit for Note PC (Personal computer) is presently needed to low power consumption and long life time, the development focus of CCFL is going on the discharge gas, phosphor and electrode material. First of all, discharge voltage characteristic of CCFL is closely connected with electrode material For low discharge voltage, the characteristic of electrode material is needed to low work function, low sputtering ratio and superior manufacturing property. We developed new CCFL with Nb/Ni Clad electrode superior to conventional CCFL. Because Nb/Ni Clad electrode with Ni material and Nb material, the electrical characteristic is superior to other electrode materials. The electrode of Nb/Ni Clad is composed that Ni of outside material has superior manufacturing property and Nb of inside material has low work function. Nb/Ni Clad of new electrode material is made by process of Rolling mill at high pressure and heat treatment. We compared electrical characteristic of Nb/Ni clad electrode with conventional Mo electrode by measurement. Mo electrode and Nb/Ni Clad electrode of cup type with diameter 1.1 mm and length 3.0mm are used to this experiment. Material content of Mo electrode is Mo 100%. But, Nb/Ni Clad electrode is composed by content of Nb 40% and Ni 60%. The result of comparison measurement between new CCFL with Nb/Ni Clad electrode and conventional CCFL was appeared that CCFL with Nb/Ni Clad electrode had superior characteristic than conventional CCFL. As a result of experiment, we completed Note PC with low power consumption and long life time by application of new CCFL with Nb/Ni Clad electrode.

• 한국식품조리과학회지
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• 제24권5호
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• pp.652-664
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• 2008

In this study, a Hazard Analysis Critical Control Point (HACCP) plan was developed for the sanitary mass production of commercial Korean rice cake products (Gaepidduk, Injulmi, and Julpyon). The microbiological properties of manufacturing flow were evaluated in order to develop the HACCP Plan. The moisture contents of the rice cakes ranged between 36.2${\sim}$55.3%, whereas the water activity of all samples ranged between 0.954${\sim}$1.0. Microorganisms testing was conducted during various phases of the product flow of Korean rice cake preparation, and included assessments of food equipment, work environment, and cooking employees on a small scale. During the manufacture of Injulmi, Julpyon and Gaepidduk, CCPs were purchasing & storage, steaming and cooling, molding, and holding in the A and B manufactories. At the critical limit of CCPs, storage was conducted below at $5^{\circ}C$ in soybean powder, oil, and paste with redbeans. The steaming process was conducted above at $99^{\circ}C$ for 40 min. Cooling and holding processes were conducted for 2 hours below at $15^{\circ}C$. The molding process included sanitary education for foodhandlers and training for operators. Thus, certain prerequisite programs had to be implemented prior to the implementation of the HACCP system. High levels of bacterial contamination were detected in the aprons worn to work by some employees. Additionally, periodic sanitary education for foodhandlers and training for operators or managers was required. Cross contamination by materials was expected at the place where materials were processed or stored.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.142-144
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• 2016

최근 제조 분야의 미래 유망기술이자, 막대한 파급효과를 유발할 것으로 예상되는 3D 프린터에 대한 관심이 급증하고 있으며, 3D 프린터 제품 가격의 하락에 따른 다양한 형태의 제품 보급이 확산되고 있다. 그러나 현재 보급되고 있는 개인용 3D 프린터는 기술적 성능의 한계점에 따라 높은 가공 정밀도를 요구하지 않는 단순한 형태의 사출물 출력에 사용되고 있으며 소비자 만족도가 매우 낮다. 따라서 본 논문에서는 기존 3D 프린터의 한계점을 극복하기 위해 정밀도가 높은 SLA 방식의 3D 프린터 사출방식과 사무용 레이저 프린터의 LSU(Laser Scanning Unit)를 융합한 폴리곤 미러 스캐닝 방식의 3D프린터를 제안하였다. 제안하는 3D프린터는 정밀도와 제조 속도를 개선하여 기존의 보급형 3D프린터를 대체할 수 있을 것으로 기대한다.