• Title, Summary, Keyword: sizing

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New Sizing System Development of Korean Male Military Winter Jacket (한국 남자 군인 방한복의 신 치수체계 개발)

  • Han, Hyunsook;Han, Hyunjung;Cho, Jayoung;Jung, Kihyo;Kim, Beomjoon;Koh, Joonseok;Park, Changkyu
    • Journal of the Korean Society of Clothing and Textiles
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    • v.40 no.5
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    • pp.954-965
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    • 2016
  • This study was designed to help develop an optimized sizing system for the military winter jackets of Korean males. First, we conducted a survey on the supply rate of military winter jackets and the wearing of suitable size jackets in order to identify problems in the current sizing system. We next developed a new sizing system generation method to satisfy the coverage rate and appropriate size number: Hybrid of Grid with Optimization. The findings of this study were: 1. The survey indicated that a 90 (chest girth) size is necessary; in addition, a one-step large size jacket fit well as a right size jacket. 2. We developed three optimized sizing systems for Korean male military winter jackets using the Hybrid of Grid with an optimization method and suggested one of them as a final new sizing system. The new sizing system consisted of two primary dimension: chest girth and stature. It has a 14 size number and its extended coverage rate is larger than the current sizing system and it has a 90 (chest girth) size. It also selected an optimized size for the area of low population density. The new sizing system is therefore considered very effective for Korean male soldiers military winter jackets.

Characteristics of Alkaline Sizing Associated with Pulp and Size Fixing Agent (펄프와 정착제에 따른 중성사이징 특성)

  • 이현철;김봉용
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.33 no.2
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    • pp.17-23
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    • 2001
  • AKD sizing behavior of handsheets, which were prepared from the different pulps with various AKD fixing agents, was studied in this investigation. AKD sizing performance could be improved by removal of fines in the stock, minimizing damage of fiber, using a suitable fixing agent and heat treatment. Fillers with low surface energy, like calcium carbonate and talc, showed quite positive effect in AKD sizing. When PAM was added to the DIP stock as fixing agent, it showed lower sizing degree than polyamine did. But in case of NBKP system, PAM was more effective than polymine.

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Sizing System for the Junior-high School Girls′ Lower Clothes According to the Lower Body type Analysis (여중생의 하반신 체형분류에 따른 하의류 치수체계)

  • 임지영
    • Journal of the Korean Home Economics Association
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    • v.40 no.7
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    • pp.119-127
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    • 2002
  • Fitness of clothes becomes a major concern in apparel industry. In order to improve clothing fitness, it's very important to suggest a systematical sizing system. The Purpose of this study was to suggest a standard sizing system for junior-high school girls'lower clothes. The subjects were 402 middle-high school girls of 13 to 15 year-old. 4 clusters were categorized by cluster analysis and the sizing system was classified according to four lower body types. The size intervals of waist girth and hip girth were 3cm and 4cm respectively. The most frequent size were 64-86 in the short and small figure type 1,67-90 in the fattest figure type 2, 61-86 in the average size type 3 and 64-90 in type 4 taller than others types. The sizing system, which had frequencies more than 4%, was classified 9 cases, 11 cases, 8 cases and 9 cases respectively by lower body types. This result will contribute to clothing fitness of consumer and the amount of production.

Theoretical Study of Coherent Acoustic Inverse Method for Bubble Sizing in Bubbly Water

  • Choi, Bok-Kyoung;Yoon, Suk-Wang
    • The Journal of the Acoustical Society of Korea
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    • v.15 no.4E
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    • pp.3-8
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    • 1996
  • The bubble size distribution is critical information to understand sound propagation and ambient noise in the ocean. To estimate the bubble size distribution in a bubbly water, the sound attenuation has been only in the conventional acoustic bubble sizing method without considering the sound speed variation. However, the effect of the sound speed variation in bubbly water cannot be neglected because of its compressibility variation. The sound attenuation is also affected by the sound speed variation. In this paper, a coherent acoustic bubble sizing inverse technique is introduced as a new bubble sizing technique with considering sound speed variation as well as the sound attenuation. This coherent sizing method is theoretically verified with the bubble distribution functions of single-size, Gaussian, and power-law functions. Its numerical test results with the coherent acoustic bubble sizing method show good agreement with the given bubble distributions.

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FEM Analyses of Hot Forging and Cold Sizing of a Spur Gear (스퍼어기어의 열간단조와 냉간사이징의 유한요소해석)

  • 박종진;이정환
    • Transactions of Materials Processing
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    • v.5 no.2
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    • pp.105-114
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    • 1996
  • Recently, precision forging techniques are applied to manufacture spur gears. Compared to conventional machining, they produce parts of better mechanical properties and less residual stresses with a much higher production rate. In the present investigation a rigid-plastic three dimensional finite element method was applied to analyze hot forging and cold sizing of a spur gear by closed dies. The involute curve of a tooth profile was approximated by a circle close to the curve. Results of the analyses make it possible to predict local strengths of the gear die failure and an appropriate preform for cold sizing. It was found that the preform for cold sizing. It was found that the preform for the cold sizing is the most important because it determines whether the gears especially teeth can be successfully formed.

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New Approaches to Flaw Classification and Sizing for Quantitative Ultrasonic Testing (정량적 초음파 시험을 위한 결함분류와 크기산정의 새로운 기법)

  • 송성진
    • Journal of the Korean Society of Safety
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    • v.12 no.2
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    • pp.3-16
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    • 1997
  • In modern high performance engineering applications, the structural integrity of materials and structures are quite often evaluated using fracture mechanics. This evaluation in turn requires information on the flaw geometry (location, type, shape, size, and orientation). The ultrasonic nondestructive evaluation (NDE) method is one technique that is commonly used to provide such information. Flaw classification (determination of the flaw type ) and flaw sizing (prediction of the flaw shape, orientation and sizing parameters) are very important issues for quantitative ultrasonic NDE. In this paper new approaches to both classification and sizing of flaws are described together with extensive review of previous works on both topics. In the area of flaw classification, a methodology is developed which can solve classification problems using probabilistic neural networks, and in the area of flaw sizing, a time-of-flight equivalent (TOFE) sizing method is presented. The techniques proposed here are in a form that can be used directly in many practical applications to quantitative estimates of the flaw's significance.

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Deterioration Mechanism of Paper according to Sizing and Beating(I)-Influences of Sizing- (사이징과 고해에 따른 종이의 열화기구(제1보)- 사이징의 영향 -)

  • 김봉용
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.30 no.2
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    • pp.24-29
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    • 1998
  • This study was carried out in order to elucidate the deterioration mechanism of paper according to various sizing chemicals. No additive paper and four kinds of papers containing rosin-alum, alum only, alkylketene dimer(AKD)-cation polymer and cation polymer only were treated by UV light to study changes of water-resistant, optical and mechanical properties from the view points of natural deterioration of paper. Since rosin chemicals have UV absorption at the relatively long wavelength region, rosins are degraded to form hydrophilic groups such as carboxylic acid from their double bonds by UV treatments. These phenomena caused the decreasing of sizing degree and wetting time in case of rosin-sized paper, while the UV treatments brought about the slight increase of wetting time in rosin-free papers such as no additive, alum and kymene only paper owing to the auto-sizing effect. Optical properties were primarily influenced by sizing chemicals. Rosin-sized paper showed lower brightness after UV and near UV treatment because of its UV instability.

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The Study on Hardware Sizing Method Based on the Calculating (계산에 기초한 하드웨어 도입 규모산정 방식 연구)

  • Ra, Jong-Hei;Choi, Kwang-Don;Jung, Hae-Yong
    • 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.

A Study on Improvement of OLTP Server Sizing Method (OLTP서버 규모산정방식의 개선에 관한 연구)

  • Ra, Jong-Hei;Choi, Kwang-Don
    • Journal of Information Technology Services
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    • v.8 no.3
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    • pp.185-195
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    • 2009
  • Hardware sizing is determinated by an increasing rate of operated business and characteristic of adapted technology which are imported systems. Because it is very difficult for intuitive decision of hardware sizing's appropriateness. But in sprite of difficulty, for maximizing the utilization of information resource and the effect of information investment in public sector are need to correctness hardware sizing. In this paper, we proposed hardware sizing method for OLTP server that is make up It's faults of proper proposal method. Our study certainly will act as a catalyst for higher investment-efficiency of future information systems in public sector.

A Study of the Benchmarks for OLTP Server's Performance Measurement and Sizing (OLTP서버 성능측정 및 규모산정을 위한 벤치마크 기준에 대한 고찰)

  • Ra, Jong-Hei;Choi, Kwang-Don
    • Journal of Digital Convergence
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    • v.7 no.3
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    • pp.25-33
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    • 2009
  • Historically, performance prediction and sizing of server systems have been the key purchasing argument for customer. To accurate server's sizing and performance prediction, it is necessary to correctness guideline for sizing and performance prediction. But existing guidelines have many errors. So, we examine the benchmarks of performance organization such as SPEC and TPC. And then we consider to TPC-C and TPC-E benchmarks for OLTP server's sizing and performance prediction that is a basic concept of guidelines. Eventually, we propose improvement of errors in guidelines.

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