• Journal of Information Technology Services
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• v.3 no.2
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• pp.9-23
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• 2004

Interest about Information infrastructure construction is enlarged socially according to arrival of information age, and various information systems are constructed for efficient business processing, customer service in public sector. According to subjective method for performance improvement for information system of public sector and engine that propel information system construction because it is no definite hardware sizing guidelines for information system caterer, is calculating resource volume of information system. It is situation that problem of excess of scale or reduce sizing is happening and is causing various kind of problems that is waste of information budget and service decline thereby. In this research, we proposed hardware sizing framework for information system that is applied to pubic sector.

• 한국디지털정책학회:학술대회논문집
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• 2004.05a
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• pp.355-367
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• 2004

Interest about information infrastructure construction is decayed socially according to arrival of information age, and various information systems is constructed for efficient business processing, customer service improvement in public sector. According to subjective method of performance improvement for information system of public sector and engine that propel information system construction bemuse it is no definite hardware sizing guidelines for introduction or system caterer, is calculating resources scale of information system. Is situation that problem of excess of scale or reduction sizing is happening, and is causing various kinds problem that is waste of information budget and service decline thereby. So, We proposed hardware sizing framework for information system that is applied to information programs.

• Journal of Information Technology Services
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• v.5 no.1
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• pp.47-59
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• 2006

According to the policy for "e-Korea construction" of Korean government, Investment of information system during the past decade are dramatically increasing. More than a half of this investment is cost of hardware infrastructure. So, accurate hardware sizing are essential for higher efficiency of investment. Accurate hardware sizing benefits are generally viewed in terms of the avoidance of excess equipment and lost opportunity costs by not being able to support business needs. Unfortunately, however, little research effort to make the hardware sizing methodology are doing. We propose a sizing method for information system in public sector. This method is determinate empirical study that are gathering and analyzing cases, making method and reviewing expert. Finally we are proposed calculating method for hardware components that is CPU, memory, internal and external disk according to the application system type which is OLTP, Web, WAS. Our study certainly will act as a catalyst for higher investment-efficiency of the future information programs in public sector.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.9_10
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• pp.1048-1059
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• 2003

This study focusses pattern draft and grading of jeans for women in their 20s, who consume jeans the most. Pattern was drafted based on existing patterns collected from companies. It is different from the existing educational patterns. It suggests new sizing system for twenties referring to sizes used companies and grading rule and method. he results were as follows; 1. Companies manufacture 2-8 sizes and they referred to the Korean Industrial Standards, KS K 0051, for their sizing system. 2. Drawing method for Pattern of the study had following measurements for each part: in the case of waist circumference, front part was W/4+1.5cm, back part was W14+2cm, front hip circumference was H/4-1.5cm, crotch line was the crotch length (practical measurement), hip circumference was (upper crotch line length)/5+0.5cm, front crotch part was 2.7cm, back crotch part was W/5+2.7cm, knee height was (the length of leg)/2+6cm and the circumference of knee and the tip of pants were 40cm. Through the wearing test on the subject of twenties, researched pattern received higher ratings, especially in appearance than the existing pattern. 3. 5 sizes system was made referred to the sizing system of companies and National Anthropometric Survey of Korean in 1997 Grading rule for 12 grading points of front part and 13 grading points of back part was suggested. Results of wearing test on the graded patterns showed high ratings similar to standard size.

• Korean Management Science Review
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• v.24 no.2
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• pp.143-155
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• 2007

The purpose of this paper is to develop a new method for information system sizing and selection based on a hybrid mixture of simulation and genetic algorithm, and to show its cost-effectiveness by applying it to a real world problem. To serve this purpose, we propose an operational model which identifies a set of system alternatives using simulation, and determines the optimal one using genetic algorithm. Specifically, with simulation, we generate probability distributions describing real data gathered from actual system, which can overcome the major weakness of the existing methodology that normally employs point estimates of the actual data and constant correction factors without theoretical rationale. We next search for the optimal combination of H/W, the number of CPUs, and S/W, which meets both of our business goals of incurring low TCO(total cost of ownership) and maintaining a good level of transaction processing performance. Experimental result shows the proposed method in this paper saves the cost while it preserves the system's capacity within allowable performance range.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.412-413
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• 2007

정보시스템의 개발 및 유지보수에 대한 기준은 과기처 등에서 제정한 'S/W 개발비 산정기준'을 준용하고 있다. 그러나 본 기준이 Business Computing 환경을 기준으로 작성되었고, 전력계통 제어를 비롯한 각종 공정제어시스템 구축 환경에 부적합할 뿐 아니라 시스템의 뼈대(Frame)를 구성하는 H/W의 규모 산정이 누락되어 있는 상태이다. 전력거래소는 우리나라의 전력계통 환경에 적합한 한국형 에너지관리시스템(이하 K-EMS)의 국산화 개발을 각종 첨단 S/W의 탑재 기준에 따라 단계별(Baseline, Prototype, Fullscale)로 추진하면서, 각 단계에 가장 적합한 하드웨어의 용량 산정 기준을 선정하는 작업을 진행하고 있다. 이는 정보시스템 개발에서 자원의 낭비를 최소화하고 전체 개발비용을 절감 할 수 있다는 점에서 매우 중요하다. 본 연구에서는 K-EMS 시스템 국산화 개발을 위해 K-EMS가 수용할 각종 응용프로그램별 특성을 감안한 하드웨어의 적정 용량 산정 기준과 적용방안을 제시하고, CPU, Memory 등 세부 항목에 대한 고려항목을 언급함으로써 최적의 K-EMS 하드웨어 Sizing 산정방안을 소개하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.11a
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• pp.273-274
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• 2007

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1123-1124
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• 2013

• Journal of the Korean Society of Clothing and Textiles
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• v.25 no.8
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• pp.1524-1535
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• 2001

The purpose of this study was to establish a sizing system according to size and dimension whereby manufactured pants can be classified and develop men’s formal pants pattern based on the analysis of ready-made and educational pants pattern. The first, we surveyed the sizing and the basic pants patterns of the men’s ready-made wear companies, Secondly, through the survey data of the domestic men’ready-mad clothing industry, we proposed a new sizing system. Lastly, after compared three different types of ready-mad pants manufactured according to their patterns and an additional type of pants made after the educational pattern, the new men’s basic pants pattern were developed. The findings were as follows: 1. Survey of the domestic ready-mad garment industry showed that each company classified its own manufactured goods according to its own sizing system: moreover, they each used its own unique patterns which appeared to be resulted from a combination of two factors : the experience of a patterner and foreign know-how technology. 2. New sizing system was developed with 12 steps from size 74-88 to size 96-106 based on the high frequencies of the companies’3. New basic patterns for men’s formal pants were developed: Inseam length = 80cm, crotch line = H/4+4.6cm, pants ham = 23.5cm as basic lines and front waist girth =W/4+9.1cm as drafting line. 4. the superiority of the new basic patterns were been demonstrated by a high approval rate of the subjects who participated in testing.

• Transactions of Materials Processing
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• v.23 no.4
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• pp.221-230
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• 2014

This study deals with a series of experimental investigations on multi-stage cold forging of an outer race used for a constant velocity (CV) joint with six inner ball grooves. The multi-stage cold forging, which consists of forward extrusion, upsetting, backward extrusion, and combined sizing-necking including ironing, was used to produce a prototype of the outer race. The cold forging tools such as forging punches and dies required in this multi-stage cold forging were also designed and fabricated. For the combined sizing-necking, especially, the longitudinally six-segmentallized punches were developed to easily eject from the necked inner groove of the outer race with consideration of the operating mechanism. Spheroidized SCr420H billet was used in the experimental study. To verify the suitability of the proposed process, the obtained parts were obtained from each forging operation, and the geometries were compared with the target dimensions. It was confirmed that the outer race with six inner ball grooves was well forged by adopting the proposed multi-stage cold forging, and the dimensional accuracy of the forged outer race matched well with the requirements.