• Smart Structures and Systems
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• 제31권1호
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• pp.1-11
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• 2023

Assessment of the compressive strength of concrete plays a major role during formwork removal and in the prestressing process. In concrete, temperature changes occur due to hydration which is an influencing factor that decides the compressive strength of concrete. Many methods are available to find the compressive strength of concrete, but the maturity method has the advantage of prognosticating strength without destruction. The temperature-time factor is found using a LM35 temperature sensor through the IoT technique. An experimental investigation was carried out with 56 concrete cubes, where 35 cubes were for obtaining the compressive strength of concrete using a universal testing machine while 21 concrete cubes monitored concrete's temperature by embedding a temperature sensor in each grade of M25, M30, M35, and M40 concrete. The mathematical prediction model equation was developed based on the temperature-time factor during the early age compressive strength on the 1^st, 2^nd, 3^rd and 7^th days in the M25, M30, M35, and M40 grades of concrete with their temperature. The 14^th, 21^st and 28^th day's compressive strength was predicted with the mathematical predicted equation and compared with conventional results which fall within a 2% difference. The compressive strength of concrete at any desired age (day) before reaching 28 days results in the discovery of the prediction coefficient. Comparative analysis of the results found by the predicted mathematical model show that, it was very close to the results of the conventional method.

• 한국소프트웨어감정평가학회 논문지
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• 제15권2호
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• pp.9-16
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• 2019

한국저작권위원회에 의뢰된 소프트웨어 저작물 감정 대상 중 25% 이상은 소프트웨어 완성도-하자 감정이다. 기존 소프트웨어 완성도-하자 감정 사례의 대부분은 해당 소프트웨어의 기능성에 국한하여 계약서에 포함된 또는 고객이 원하는 요구사항들이 구현되어 작동되는지 확인하는 방식으로 이루어졌다. 본 논문은 소프트웨어 완성도 정의에 부합할 수 있도록, 보다 체계적이고 합리적인 완성도-하자 감정 기법을 제안한다. ISO/IEC 9241.10 표준은 소프트웨어 품질 제고를 위한 설계표준이라 할 수 있다. ISO/IEC 9241.10 표준은 준수되어야 하는 7개 항목을 규정하고 있으며, 작업을 위한 기능상의 완전성과 작업 능률 효율화를 위한 사용상의 완전성을 요구하고 있다. 본 논문에서 제시된 소프트웨어 완성도-하자 감정 방법론은 소프트웨어의 질적 품질에 대한 완성도 감정으로 기존 기능구현-작동 여부 감정 방법론은 보완하고 있다.

• 대한가정학회지
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• 제37권10호
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• pp.123-133
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• 1999

The purpose of the study was to develop the parenting style scale which is reflecting cultural background of Korean parent's parenting for their children. The instalment was designed based on the literature reviews and on the Baumrind's parenting style. A total of three hundred and sixty two mothers whose children from first and second grade in elementary school completed the Questionnaires. The questionnaires consisted with the items addressing different types of parenting style which include love and care, encouragement of independence, enjoyment in parenting, communication, control, control of aggressiveness, strategies of control , request of maturity. Factor of analysis was applied to examine validity of Korean parenting style scale. Based on the factor analysis, 33 items selected for final questionnaire and two factors discovered. The first factor which named 'warmth'included 20 items such as love and care toward their children, communication, enjoyment in parenting, encouragement toward independency. The second factor which named'control'included 13 items such as control of children's behavior and discipline of children. Warmth factor accounted for 46% of variance and control factor accounted for 18% of variance. Internal consistency was also checked. Although warmth and control factor represented a moderate internal consistency, control factor showed lower correlations then warmth factor. The reliability estimates (Cronbach alpha) were. 87 and 71 for warmth and control factor respectively. Korean parenting style scale can be used to address the appropriateness of Baumrind's theoretical assumptions in parenting style as well as to examine parenting style for Korean population. However, this instalment was developed with Korean mothers only. Further analysis need to be addressed with fathers.

• 한국국방경영분석학회지
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• 제36권1호
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• pp.51-64
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• 2010

본 논문에서는 국내에서 개발한 각 군의 주요 워게임 모델의 VV&A 수행 실태를 조사 분석한다. 이를 기초로 VV&A 활동의 참조 틀로써 VV&A 프레임워크를 제안한다. VV&A 프레임워크는 VV&A 기본모델과 참조모델 그리고 지원도구로 구성된다. VV&A 기본모델은 VV&A 프로세스, 산출 문서와 적용기법으로 구성된다. VV&A 참조모델은 VV&A 활동 유형별 확인사항 목록표, VV&A 수행 수준 분석모델과 VV&A 성숙도 관리 모델로 이루어진다. VV&A 지원도구는 VV&A 산출 문서 작성과 관리를 지원하는 도구이다. 제안하는 VV&A 프레임워크는 VV&A 계획 수립과 실행 시 참고할 수 있다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.337-340
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• 2003

최근 건설사업관리(Construction Management : 이하 CM) 발주방식이 늘어 나고 있다. 해외 선진국에서는 건설 산업 전반에 걸쳐 핵심 성공요인과 모범사례를 활용을 극대화 하여 다양한 건설산업의 핵심 성과지표 향상에 기여하고 있고 표준지표를 제시하여 산업계의 벤치마킹 자료로 활용하고 있는 반면 국내에서의 연구개발은 개념 정립 단계이다. 그래서 본 연구는 CM적용 모범사례 및 핵심성공요인 체크리스트 개발을 통한 산업계 수행능력 향상 및 CM적용효과 평가 기법을 개발해 CM사업의 성공적인 국내 도임에 일조하고자 한다.

• 시스템엔지니어링학술지
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• 제8권2호
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• pp.27-36
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• 2012

In modern systems, the operational capability of the system to the user needs is expanding rapidly to accommodate the size of the system, functionality, and interfaces are becoming increasingly complex. Accordingly, the systematic practice of project management and systems engineering in the system development process, as an important element in successful systems development is recognized. EIA/ANSI 632, ISO/IEC15288, the leading international standard for systems engineering and is the leading international standard on project management PMBOK. CMMI is also contains information about the activities of project management and systems engineering and worldwide basis to assess the maturity of an organization's ability to develop system being used. But CMMI model is too complex of structure and there are many overlap parts of contents. So there are many problems for members of organization understanding all of CMMI model, applying organization and, achieving improvement activity. In this study, through the analysis and integration between the model and the related standard coverage activities essential for successful systems development in organizations that require systems engineering and project management capabilities(SEPMC) for self-assessment and continuous improvement activities to provide useful reference guideline.

• Journal of Forest and Environmental Science
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• 제31권3호
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• pp.149-163
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• 2015

The aim of the present study was to assess the variation in species composition and diversity of woody species at different altitudes (900 to 2600 m asl) in Kedarnath Wildlife Sanctuary (KWLS) and its adjoining areas in Garhwal Himalaya, India. A total of 94 woody plant species (including 44 tree and 50 shrub species) belonging to 72 genera and 44 families were reported. Density varied from $235{\pm}9$ to $505{\pm}21trees\;ha^{-1}$ and $4,730{\pm}474$ to $9,530{\pm}700shrubs\;ha^{-1}$. Total basal cover varied from $10.49{\pm}0.66$ to $42.92{\pm}2.57m^2ha^{-1}$ (trees) and $0.36{\pm}0.024$ to $0.62{\pm}0.047m^2ha^{-1}$ (shrubs). Shannon-Wiener Index fluctuated between 2.30 to 3.53 (trees) and 2.74 to 3.78 (shrubs). Analysis of variance (ANOVA) indicated that altitude and aspect had significant effect on the distribution of woody species. Taxonomically, Rosaceae with 15 species emerged as the dominant family. Low value of maturity index and contiguous distribution of species denoted the early successional status of the studied forests. The conservation assessment based on altitudinal regimes and the information on species structure and function can provide baseline information for monitoring and sustaining the biodiversity.

• 정보처리학회논문지D
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• 제12D권7호
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• pp.937-946
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• 2005

최근의 소프트웨어 시장에는 조직의 사업 목적 달성을 위한 성숙모델, 표준, 방법론 및 지침들이 개발되고 있다. ISO/IEC 15504와 CMMI등 모든 SPI 모델들은 숙련된 전문 심사원을 통하여 소프트웨어 프로세스의 능력수준을 결정한다. 그러나 숙련된 전문심사원이라 할지라도 프로세스 측정을 위한 체계적인 척도를 제공하지 않으므로 심사원은 심사대상 프로세스의 정량적인 수준 측정을 위하여 객관적이며 일치된 판단을 통해 프로세스를 평가할 수 없다. 본 논문에서는 ISO/IEC 15504와 CMMI의 핵심 프로세스들에 대하여 정량적이고 객관적인 측정을 위하여 척도를 설계하였고, 실험을 통하여 척도의 타당성을 분석방법을 이용하여 증명하였다. 이를 통해 객관적인 측정 절차와 척도의 사용을 통하여 효과적 SPI 활동을 기대할 수 있다.

• Journal of Plant Biotechnology
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• 제5권1호
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• pp.59-61
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• 2003

Petiole explants from 20 cultivars of Catharanthus roseus were cultured on various shoot-inducing media to assess their competence for adventitious shoot formation. After eight weeks of culture on Murashige and Skoog' s medium supplemented with 4.4 $\mu\textrm{m}$6-benzyladenine and 0.5 $\mu\textrm{m}$ $\alpha$-naphthaleneacetic acid, petiole explants from 'Cooler Icy Pink' exhibited the greatest frequency of adventitious shoot formation at 40%, which was followed by 'Little Bright Eye'. By comparing with a previous study on assessment of competence for adventitious shoot formation in hypocotyl explant cultures of various cultures, it is indicated that the relative degree of their competence among cultivars varies to the organ used for the source of explant. Excised adventitious shoots were readily rooted on half-strength MS basal medium. Regenerated plantlets were successfully transplanted to potting soil and grown to maturity in a greenhouse.

• 한국수학교육학회지시리즈A:수학교육
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• 제57권2호
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• pp.75-92
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• 2018

Based on Perceptions about Mathematics Teachers (PMT) perceived by high school students, measured by 2189 students from Seoul Educational Longitudinal Study 2014 (SELS 2014), latent profile analysis (LPA) identified five distinct types of student groups (positive, partial positive, middle, negative, extreme negative). These student of positive, middle, and negative groups are positive, moderate and negative perceptions about math teachers. Partial positive group generally had a positive perception about mathematics teachers, extremely negative group was very negative about mathematics teachers. Both of these groups had peculiarly inconsistent trends and several anomalies. The Multinomial logistic regression analyses also indicated that individual factors (gender, major, self-concept, resilience, self-assessment, career maturity), school factors (friendship, relationship with school teachers) and parental factors (academic-relationship, emotional-relationship) were significant predictors of PMT profile groups. The Analysis of variance also indicated that mathematics class (attitude, satisfaction and atmosphere), Mathematics achievement were significant predictors of PMT profile groups. The profiling of perceptions about mathematics teachers resulted in enhanced understanding of the complex range of processes students employed. During mathematics class, implementation of smooth interactions and communications between students and teachers added in the teaching and learning of mathematics.