• Title/Summary/Keyword: CM method

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Feasibility Analysis of Introducing CM at Risk Delivery Method to the Korean Public Construction Industry by Analyzing Attributes of the Projects (대상공사의 특성요인 적합도 분석에 의한 공공부문 'CM at Risk 방식' 도입의 타당성 분석)

  • Koh, Min-Hyeok;Kim, Yea-Sang;Kwon, Soon-Wook;Chin, Sang-Yoon
    • Korean Journal of Construction Engineering and Management
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    • v.11 no.2
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    • pp.3-14
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    • 2010
  • A high degree of management skills and functions is essential to the success of construction projects. While the various construction management delivery methods have been realized as the solutions, Korean government is planning to introduce 'CM at Risk Method' to the public construction projects. However, even if its effect has been verified successful in the international market, it must be considered before legally adapting the method that it would be suitable to our public sector, In this respect, the purpose of this study is to evaluate and analyze feasibility of 'CM at Risk Method'. In order to do that, 15 attributes of construction projects were found, which were suitable to 'CM at Risk Method' in general, 'CM at Risk-GMP Method', and 'CM at Risk-Cost Reimbursable Method' and suitability of each attribute to each of 9 categories of public construction facilities was evaluated by questionnaire survey to CM specialists. Results showed that 'CM at Risk Method' might not bring improper effect to the industry but due to the characteristic of public sector, the effect would be very limited.

Effects of Single-Row Transplantation on Improving Strawberry Growth and Marketable Yield

  • Park, Gab-Soon;Kim, Young-Chil;Ann, Seoung-Won
    • Journal of Environmental Science International
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    • v.25 no.6
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    • pp.749-756
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    • 2016
  • This study shows how the growth of the top part of plants cultivated using the single-row strawberry method, with 12 cm plant spacing, as well as that of plants cultivated through conventional planting, is characterized by the presence of many leaves in the first flower cluster harvest. The leaf area and crown diameter were the largest in the 12 cm spacing method. The hight top fresh weight (59.2 g) was detected wen the 12 cm spacing method was used followed by conventional planting and, 9 cm and 6 cm spacing method. The K and Ca contents in the first flower cluster were the highest when the 12 cm spacing method (2.0% and 2.1%, respectively) and conventional planting, (0.42% and 0.86%, respectively) were used, and these values were significantly higher than the K and Ca contents obtained using the other two methods. The N, P, Mg, Fe, and B contents show no significant differences across the planting methods. The sugar content of the first flower cluster fruits was the highest when the 12 cm spacing method was used, while the sugar content of the fourth flower cluster fruits was highest after conventional planting. Firmness was the highest in the first, third, and fourth flower clusters after conventional planting, while no significant differences were observed for the 6 cm, 9 cm, and 12 cm spacing methods. A yield of 25 g or above during November to December was observed to be the highest when the 12 cm spacing method was used, while a yield of 10-16 g was the highest when both the 9 cm and 12 cm spacing methods werw used. The yield of products in January-April was the highest when the 12 cm spacing and conventional planting methods were used, and total product yield was also the highest for these methods. A significant portion of non-marketable products (39 g) was obtained when the conventional planting method was used.

A Study on the Role of Construction Management in the Construction Turn-Key Projects (턴키사업과 CM의 역할)

  • Kim Kyung-Nam;Kim Jong-Hoon
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.223-232
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    • 2002
  • The government, in order to settle and activate the use of Construction Management (CM) method, clarified the legal Issues pertaining to infrastructure development and is taking an active role to promote CM through government sponsored pilot projects. However, when a CM method is applied to a turn-key protect, many applicational difficulites are expected. With design and construction are performed under the simple responsibility in a turn-key method, roles of CM's is overlapped. Also, the characteristics of turn-key method are not reflected to the present $\lceil$CM Work Guideline$\rfloor$. Over the years, various problems have been identified from turn-key projects. Korea's $\lceil$CM Work Guideline$\rfloor$ is more inclusive compared to the CM services of CMAA and overlooks the importance of CM's roles in pre-design phase. In this study, CM's roles of pre-construction phase (pre-bidding, bidding, detail design, contracting) in construction turn-key projects were identified and complementary policy for institution was suggested. We further look into dividing the roles of the CM at turn-key project Into professional role and emotional role. Also, we speculate problems of the existing experience in turn-key projects and suggest a rough methodology on how these concepts can be adjusted for improve the turn-key method.

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A Case Study on the CM Effect Analysis According to Project Delivery Methods in Private Projects (민간 프로젝트에서의 발주방식에 따른 CM효과 분석에 관한 사례연구 -전통적 방식과 발주자형 CM을 중심으로-)

  • Lee Hee-Chang;Kim Young-Il;Kim Yong-Su
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.278-281
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    • 2003
  • The purpose of this study is to analyze CM effects between traditional and owner CM types according to project delivery methods in private projects. The research method of this study includes case studies and survey from construction management experts. The results of this study are as follows: 1)The owner CM type is proved to be much more effective than traditional method in various management function areas. 2)Planning, design, and quality management areas are proved to be very strong in the case of owner CM type.

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Development of Kiln Drying Schedule of Hydrid Aspen (Populus alba × glandulosa) by Oven Drying Method (급속건조법(急速乾燥法)에 의한 은수원사시재(材)의 인공건조(人工乾燥)스케쥴 개발(開發))

  • Lee, Hyoung-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.15 no.2
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    • pp.113-119
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    • 1987
  • A study was conducted to determine the kiln drying schedule for hydrid aspen, This kiln drying schedule was found by oven drying method and developed by pilot testing of 2.0cm, 2.5cm, 3.0cm-thick green lumber. The results of this study were as follows: 1. Kiln drying schedule developed by oven-drying method was $T_{12}-E_5$ for 2.5cm-thick green lumber. 2. Drying times for 2.0cm-thick green lumber(127.0 percent moisture content) to 7.3 percent moisture content, for 2.5cm-thick green lumber(95.0 percent moisture content) to 9.7 percent moisture content, and for 3.0cm-thick green lumber(118.5 percent moisture content) to 10.0 percent moisture content were 45 hours, 45 hours, and 54 hours, respectively. 3. Drying rate from 90 to 10 percent moisture content of 2.5cm-thick lumber was about 0.7 times faster than that of 2.0cm-thick lumber and about 1.1 times faster than that of 3.0em-thick lumber. 4. End checks for 2.0cm-, 2.5cm-, and 3.0cm-thick green lumber occurred 95, 74 and 100 percent moisture content, respectively and reached maximum amount in 53, 41, and 60 percent moisture content, respectively. 5. No surface check and no honeycomb occurred. 6. Cupping and collapse slightly occurred and the quality of dry lumber was first.

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A study on the design method of tight fit Thorso patterns for adult males using fashion CAD system - Focusing on the sway back somatotype and the bend forward somatotype - (패션 CAD 시스템을 활용한 성인남성의 타이트 핏 토르소원형 설계방법 연구 - 휜체형과 숙인체형을 중심으로 -)

  • Hong, Eun-Hee
    • Journal of the Korea Fashion and Costume Design Association
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    • v.23 no.4
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    • pp.149-166
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    • 2021
  • This study tried to suggest a drafting method to draft tight fit torso patterns suitable for adult males with a sway back somatotype and a bend forward somatotype by setting and distributing the ease through the completion of the somatic surface pattern using the 3D body surface segment method. It was intended to be presented as a drafting method. As for the research method, the suitability of the somatic surface patterns and the tight fit torso patterns were confirmed by the evaluation of virtual wear, and the patterns were modified and supplemented. The research results are as follows. In the first evaluation of the tight fit torso patterns, the average, for 55 evaluation items, was 3.92 points for the sway back somatotype and 3.89 points for the bend forward somatotype. In the second evaluation, the bend forward somatotype was 4.51 points and the sway back somatotype was 4.62 points. The chest circumference ease amount for the bend forward somatotype and the sway back somatotype are 6.5% (6.8 cm) and 7% (6.8 cm) of the chest circumference, respectively, and the distribution of the front and back ease is the same at 4:6 (2.72 cm:4.08 cm). The waist circumference ease amount is 6.5% (5.8cm) and 6.5% (5.6 cm) of the waist circumference dimensions, and the distribution of the front and backease are 5:5 (1.45 cm: 1.45 cm) and 4:6 (2.24 cm: 3.36 cm), respectively. The completed tight fit torso patterns were converted into institutional formulas and presented as a drafting method.

A generating method of CM parameters of pairing-friendly abelian surfaces using Brezing-Weng family (Brezing-Weng 다항식족을 이용한 페어링 친화 아벨 곡면의 CM 파라미터 생성법)

  • Yoon, Kisoon;Park, Young-Ho;Chang, Nam Su
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.25 no.3
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    • pp.567-571
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    • 2015
  • Brezing and Weng proposed a method to generate CM parameters of pairing-friendly elliptic curves using polynomial representations of a number field, and Freeman generalized the method for the case of abelian varieties. In this paper we derive explicit formulae to find a family of polynomials used in Brezing-Weng method especially in the case of abelian surfaces, and present some examples generated by the proposed method.

Liver Size Measurement Method by Ultrasonography and Reference Range based on Normal Adult Physique Index (초음파검사에 의한 간 크기 측정방법 및 정상 성인의 체격지수별 참조범위)

  • Kim, Yong-Kyun;Han, Dong-Kyoon
    • Journal of radiological science and technology
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    • v.41 no.1
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    • pp.13-24
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    • 2018
  • Liver size is an important component in the diagnosis and follow-up of diffuse liver disease when testing for liver disease using ultrasonography. However, difficulties lies in determining the presence of hepatomegaly and liver atrophy because the method used for measuring liver size differs from one examiner to another and there is no relevant standard based on body build. The present study aims to propose a more objective method for liver size measurement and a reference range based on body build. A total of 260 normal adults (130 males, 130 females) participated in the study. Ultrasonography was performed in all participants to measure the size of the right lobe, left lobe, quadrate lobe, and caudate lobe of liver. Based on Physique Index(PI), a value derived from multiplying weight(kg) by height($m^2$), size of physique was divided into three groups including Group I with PI<150, Group II with $150{\leq}PI{\leq}250$, and Group III with PI>250. Thus, mean liver size by PI and a reference range with 95% reliability were suggested. The superoinferior diameter of right lobe was $12.34{\pm}1.18cm$ in males and $11.07{\pm}0.93cm$ in females, and its reference range was 10.64~11.0cm for Group I, 11.78~12.12cm for Group II, and 13.02~13.84cm for Group III. The anteroposterior diameter(T) of left lobe was $5.93{\pm}1.09cm$ in males and $5.18{\pm}0.99cm$ in females, and its reference range was 4.77~5.17cm for Group I, 5.49~5.79cm for Group II, and 6.68~7.44cm for Group III. The transverse diameter was $3.51{\pm}0.60cm$ in male participants and $3.42{\pm}0.49cm$ in female participants and its reference range was 3.29~3.51cm for Group I, 3.36~3.55cm for Group II, and 3.52~4.0cm for Group III. The caudate lobe index was $11.65{\pm}2.88cm^2$ in males and $9.62{\pm}2.18cm^2$ in females and its reference range was $8.83{\sim}9.75cm^2$ for Group I, $10.62{\sim}11.47cm^2$ for Group II, and $11.89{\sim}14.26cm^2$ for Group III. As a basic measurement method of liver size, the present study suggests measuring the superoinferior diameter for right liver lobe, the anteroposterior diameter for left liver lobe, the transverse diameter for quadrate lobe, and the caudate lobe index for caudate lobe. It is expected that this method along with its relevant reference range can be used as useful indicators in determining hepatomegaly and liver atrophy upon the diagnosis and follow-up testing of diffuse liver disease.

Identification of Core Competencies of Construction Managers (CM단장 핵심역량 발굴에 관한 연구)

  • Kim, Dong-Hee;Kim, Han-Soo
    • Korean Journal of Construction Engineering and Management
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    • v.12 no.6
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    • pp.93-100
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    • 2011
  • As the construction management(CM) market has grown, so has the CM competition in the market place. Consequently, competent construction managers become a core part of CM firms' competitiveness. The objective of the study is to identify and discuss core competencies of construction mangers based on literature survey, Delphi Method and AHP. Among various competencies required for construction managers, skills for problem solving, trust and negotiation skills were identified as the crux of construction managers' competencies. A better understanding of construction managers' core competencies is very critical in terms of CM firms' training of construction managers and continuos self-improvement for construction managers.

Development of tight-fit patterns for adult males according to the 3D body surface segment method (3D 체표면 분할 전개방법에 의한 성인 남성 밀착원형 설계)

  • Hong, Eun-Hee
    • The Research Journal of the Costume Culture
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    • v.28 no.1
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    • pp.1-14
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    • 2020
  • This study is based on a representative body shape drawn from previous studies that classify adult male torso shapes. In this study, a design method is proposed by developing a tight-fit pattern that can be easily developed into various items and designs using the body surface development figure. This is obtained by converting the 3D body shape of the model representing the representative body shape. The specific design method was conducted as follows. Actual measurement values were used for waist back length, waist-to-hip length, shoulder length. The scye depth was determined as C/4-1.7 cm, and the front and back Interscye was set at (1/2 × actual measurements)-0.2 cm. The front-back neck breadth was set to (1/5 × base neck circumference)-1.3 cm and (1/5 × base neck circumference) cm. The front-back neck depth was set to (1/5 × base neck circumference)-1.2 cm and 3.5 cm. Front chest circumference was C/4-1 (front-back difference)cm; (1/4 × back chest circumference) was C/4 + 1 (front-back difference) + 0.3 (dart amount) cm. Front waist circumference was W/4-0.2 (front-back difference) + 2.2 (dart amount) cm; back waist circumference was W/4 + 0.2 (front-back difference) + 2.5 (dartamount) cm; front hip circumference was H/4 + 0.2 (ease) + 0.2 (front-back difference) cm; and back hip circumference was H/4 + 0.2 (ease)-0.2 (front-back difference) cm; Front droop was 1.6 cm. The newly developed tight-fit pattern is expected to be of great use as a basis for garment construction.