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남소정(So Jeong Nam),이승우(Seung Woo Lee),이재경(Jai-Kyung Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Many studies are performed regarding the method of collecting field data in real time. The importance of real-time data in the production site is highlighted because of IT application to the production and manufacturing industry. Equipment operation information can be an important basis to improve enterprises’ competitiveness when the production site is monitored in real time and the production power is analyzed and provided by upper-level systems, such as the manufacturing execution system and ERP. This study introduces a method of collecting the equipment operation information in real time using a PLC. If the information cannot be extracted as digital data, analog information can be collected instead using temperature or current sensors. As a result, scalability and real time can be applied when collecting equipment operation information. The operation information collected in real time can be effectively utilized as the basic data for production statistics, equipment control, and malfunction diagnosis of equipment through the interface with the manufacturing execution system.
다양한 생산 설비와의 인터페이스를 고려한 설비정보 수집
남소정(So Jeong Nam),이재경(Jai-Kyung Lee),이승우(Sung Woo Lee),박종권(Jong Kweon Park) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.2
다양한 생산 설비에 따른 설비정보를 MES 등의 생산시스템에 효율적으로 제공하기 위해 설비 정보 수집 시스템은 생산현장의 설비 및 공정특성을 고려한 다양한 설비 인터페이스에 따른 정보수집이 필요하다. 본 연구에서는 생산현장의 다양한 생산 설비의 정보를 수집하기 위해 설비 인터페이스를 통한 설비정보 수집 방법을 제안한다. PLC 기반의 인터페이스, Sensor 기반의 I/O 인터페이스, 작업자 Key-In 에 의한 인터페이스 등 다양한 설비 인터페이스를 통해 생산 현장의 정보를 1 차 수집할 수 있다. 데이터 수집 시스템은 H/W Communication Module 과 Operator Key-In Module 을 이용하여 설비 인터페이스를 통해 수집되는 설비 정보를 2 차 가공하며, 데이터 파서(Data Parser)를 통해 수집 정보의 유연성을 높일 수 있다. There is much information of equipment in shop floor because the manufacturing processes are different as the equipment within the manufacturing process is varied. To provide effective process information to MES and other production systems, the DAS requires an equipment monitoring system that takes into account the characteristics of the equipment on the shop floor. In this study, we proposed some methods for collecting the required information about various equipments on a shop floor. The equipments such as CNC can be interfaced with the DAS by using a PLC-based method and a sensor-based interface board can be used to interface general equipments. The proposed methods can be used to collect information on the shop floor in real-time. Moreover these methods are very adaptive and can be easily modified according to the changes made to the shop floor. The information about a real shop floor acquired by employing these methods is saved in a database and the can be provided to a supervisor and MES so that they are aware of the status of the shop floor.
남소정(So-Jeong Nam),이재경(Jai-Kyung Lee),이승우(Seung Woo Lee),박종권(Jong Kweon Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
The thermal error is a very important factor in the accuracy of machine tools. This paper proposes a system which enables real-time based measurement and compensation of thermal error of machines. The system was designed with the sensors having appropriate measurement ranges for the purposes, set up on the related points of a micro-machine to measure data in real-time basis, and DAS built-in with a data collection module which enables the operator to monitor and respond to the micro-machine in real-time basis.
적색식용색소인 아마란스의 약동학 특성 및 위장관 투과도 연구
한유진(Youjin Han),구수현(Soo Hyeon Goo),남소정(So Jeong Nam),강윤주(Yun Ju Kang),권미화(Mihwa Kwon),송임숙(Im-Sook Song) 한국생명과학회 2017 생명과학회지 Vol.27 No.7
적색 아조류 타르색소인 아마란스는 인공식용색소로 식품, 화장품, 의약품에 광범위하게 사용되고 있음에도 불구하고, 경구로 복용하였을 때 위장관 흡수율이나 흡수특성에 대해 연구된 바가 없다. 본 연구의 목적은 아마란스의 정맥투여 또는 경구 투여 후 약동학 특성을 평가하고 diffusion chamber system을 이용하여 위장관 흡수율 및 투과도를 평가하고자 하였다. 정맥투여된 아마란스는 38.8분의 소실반감기로 빠르게 혈중에서 소실된다. 그러나 경구투여된 아마란스는 생체이용률도 55.6%로 높은 위장관 흡수율을 나타내며 408분까지 혈중농도가 증가하고 24시간까지 혈중에 남아있는 특성을 나타내었다. 이는 아마란스의 위장관 흡수가 오랫동안 지속적으로 일어나는 것을 의미한다. 이를 확인하기 위하여 소장의 흡수부위를 공장, 회장사부, 회장하부로 나누어 위장관 투과도를 평가하고 투과성이 잘 알려진 지표물질과 비교하였다. 연구결과 아마란스의 위장관투과성은 투과도가 매우 높은 caffeine의 1/3정도의 투과도를 보이고, 중등도의 투과도를 보이는 atenolol과 유사한 투과도를 나타내었으며 회장상부에서의 투과도가 가장 높았다. 결과를 종합하면, 아마란스는 경구투여된 뒤 지속적으로 흡수되며 흡수율도 50% 이상을 보이므로, 식품, 립케어 화장용품, 경구용 의약품에 아마란스 등의 색소가 포함될 경우에는 첨가량 등을 고려하여 신중하게 사용해야 할 것이다. Although amaranth, a red-colored tar dye, is usually used in foods, cosmetics, and pharmaceutics, its bioavailability and intestinal absorption have not previously been investigated. Therefore, the purpose of this study was to investigate the pharmacokinetics properties and intestinal permeability of amaranth in rats following the intravenous and oral administration of this dye. Amaranth rapidly disappeared from the plasma following the intravenous injection, with a half-life of 38.8 minutes. However, the plasma concentration of amaranth was increased to 400 minutes following the oral administration of amaranth, and the absorption time and bioavailability of amaranth were calculated to be 356 minutes and 55.6%, respectively. This suggests that once amaranth exists in the gut, this dye may be efficiently and effectively absorbed. Consistent with this result, the intestinal permeability of amaranth was comparable to atenolol, a marker compound of moderate permeability, and to one-third of caffeine’s intestinal permeability (a highly permeable compound). In conclusion, a significantly long absorption time and substantial intestinal absorption of amaranth was observed following the oral administration of amaranth at a dose of 300 mg/kg in rats, despite the rapid elimination of this dye from the plasma. These results may suggest the necessity of a careful and limited use of amaranth dye when it is added to food, lip-care cosmetics, and orally administered pharmaceutics.
노희진 ( Hie-jin Noh ),배성숙 ( Sung-suk Bae ),김선경 ( Seon-kyeong Kim ),문소정 ( So-jung Mun ),한선영 ( Sun-young Han ),조효순 ( Hyo-soon Cho ),남정란 ( Jeong-ran Nam ),김성옥 ( Seong-ok Kim ),김보경 ( Bo-kyoung Kim ),정경이 ( K 한국치위생학회(구 한국치위생교육학회) 2017 한국치위생학회지 Vol.17 No.1
Objectives: The present study is aimed at comprehending the organizational setup of clinical dental hygienists and to establish an organizational setup that fits their roles. Methods: The survey data of 776 clinical dental hygienists who understood the purpose of the study and agreed to write the questionnaire was utilized. Statistical analysis was performed using SPSS Ver. 20.0 program and the significance level was 0.05. Results: The presence of an organizational setup in dental hygienists was surveyed as being higher, with university dental hospital (89.86%) showing the highest. However, the presence of position terms was highest in dental hospitals with 76 subjects (38.78%). Standards for positions most commonly followed hospital regulations in the case of general hospitals (48.42%), whereas they were often based on service period in the case of dental hospitals (48.90%). Salary standards were most commonly determined by service period in all institutions. The job satisfaction of dental hygienists was significantly different according to social status and financial satisfaction depended on having organizational hierarchy for those who work in university dental hospitals. Conclusions: The results of the present study show that dental hygienists who work in organizational setups mostly enjoy high satisfaction in terms of job satisfaction. In other words, the study shows that systemizing the organizational setup of dental hygienists within dental institutions is required, and additional research to achieve efficient human resource management within the organization is necessary as well as institutional utilization of the results of the present study.
이재경(Jai-Kyung Lee),이승우(Seung Woo Lee),남소정(So Jeong Nam),박종권(Jong Kweon Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
To implement the flexible MES, the shop floor information acquisition system that can process the information of shop floor in real-time and adaptive to the changes of shop floor is needed. The proposed system is the bridge between the shop floor and the Manufacturing Execution System (MES). The collected shop floor data are saved in the equipment information database, and can be provided to the MES as needed. The RFID-based work order management and the SOA-based interface to other systems can be helpful to track the progress of a work order.