• Title/Summary/Keyword: back analysis method

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A Study on the Design of Database to Improve the Capability of Managing Offshore Wind Power Plant (해상풍력 풍력시스템의 관리능력 향상을 위한 데이터베이스 설계에 관한 연구)

  • Kim, Do-Hyung;Kim, Chang-Suk;Kyong, Nam-Ho
    • Journal of the Korean Solar Energy Society
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    • v.30 no.3
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    • pp.65-70
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    • 2010
  • As for the present wind power industry, most of the computerization for monitoring and control is based on the traditional development methodology, but it is necessary to improve SCADA system since it has a phenomenon of backlog accumulation in the applicable aspect of back-data as well as in the operational aspect in the future. Especially for a system like offshore wind power where a superintendent cannot reside, it is desirable to operate a remote control system. Therefore, it is essential to establish a monitoring system with appropriate control and monitoring inevitably premised on the integrity and independence of data. As a result, a study was carried out on the modeling of offshore wind power data-centered database. In this paper, a logical data modeling method was proposed and designed to establish the database of offshore wind power. In order for designing the logical data modeling of an offshore wind power system, this study carried out an analysis of design elements for the database of offshore wind power and described considerations and problems as well. Through a comparative analysis of the final database of the newly-designed off-shore wind power system against the existing SCADA System, this study proposed a new direction to bring about progress toward a smart wind power system, showing a possibility of a service-oriented smart wind power system, such as future prediction, hindrance-cause examination and fault analyses, through the database integrating various control signals, geographical information and data about surrounding environments.

A Comparison of Fit and Appearance between Real Pants with 3D Virtual Pants (실제착의와 3D 가상착의의 외관 유사도 평가에 관한 연구 - 여성복 바지원형을 중심으로 -)

  • Kim, Youngsook;Yin, Siya;Song, Hwa Kyung
    • Fashion & Textile Research Journal
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    • v.16 no.6
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    • pp.961-970
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    • 2014
  • Several retailers such as Target and Kohle's and their vendors have piloting the 3D clothing simulation programs to produce garment samples. However, few studies have verified the virtual fit information and 3d visualization process for pants, and no study compared the commercial 3D virtual programs. This study is designed to analyze similarity of fit and appearance between real pants with 3D virtual pants based on three 3D virtual programs (Optitex, CLO 3D, and i-Designer), three lower body types (slim, normal, and thick waist type), and fit status. We selected a representative model for each lower body type, produced their custom pants according to Lee and Nam's method(2007), and took photos of front, side and back view for visual analysis. Then, we virtually tried each model's custom pants on her parametric avatar developed by manually inputting their body measurements using the three 3D virtual program. Thirty fit experts compared the real fit to virtual fit. This study found that 'Optitex' and 'i-Designer' can visualize more effectively than 'CLO 3D' in many fit locations. Regarding the body types, 3D virtual program can visualize pants fit for 'thick waist body type' more preciously than the other body types. With respect to fit status, it does not affect much on the similarity overall.

A study on the 3D simulation system improvement through comparing visual images between the real garment and the 3D garment simulation of women's Jacket (여성 재킷의 실제착의와 가상착의 비교를 통한 3D 가상착의 시스템 개선에 대한 연구)

  • Kwak, Younsin
    • The Journal of the Convergence on Culture Technology
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    • v.2 no.3
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    • pp.15-22
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    • 2016
  • The purpose of this study is to propose improvements for 3D garment simulation system by comparison with the difference between real garment and 3D garment simulation of women's jacket. The process of the study was to take pictures on the standard sized subject wearing the jacket of basic size, to get a avatar from body sizes of the subject, and to obtain images of 3D garment simulation on the avatar. The appearance evaluation was resulted by the method of a questionnaire survey after presenting the images to 24 members of patterner and 22 members of designer. On that appearance evaluation by designer group, perform comparative analysis of differences between the real garment and the 3D garment simulation of women's jacket. On that appearance evaluation by patterner group, perform comparative analysis of differences between the real garment and the 3D garment simulation of women's jacket. There were the differences on 4 areas: 1 questions of the side, 1 questions on the back, 7 questions on the sleeve, and 1 questions on the collar, and the results showed that the 3D garment simulation was preferable on each question.

A study on simulation of women's Jacket using 3D CAD system (3D CAD system을 활용한 여성재킷 시뮬레이션에 관한 연구)

  • Kwak, Younsin
    • The Journal of the Convergence on Culture Technology
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    • v.4 no.3
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    • pp.191-196
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    • 2018
  • The purpose of this study is to propose improvements for 3D garment simulation system by comparison with the difference between real garment and 3D garment simulation A, B of women's jacket. The process of the study was to take pictures on the standard sized subject wearing the jacket of basic size, to get a avatar from body sizes of the subject, and to obtain images of 3D garment simulation on the avatar. The appearance evaluation was resulted by the method of a questionnaire survey after presenting the images to 20 members of women's jacket customer. On that appearance evaluation, performed comparative analysis of same degree between the real garment and the Virtual garment A in women's jacket. And performed comparative analysis of same degree between the real garment and the Virtual garment B in women's jacket. It was done t-test for difference in appearance evaluation between real garment/virtual garment A and Real garment/virtual garment B. There were the differences on 4 areas: 1 question on the fabric, 9 questions on the front, 3 questions on the side, and 6 questions on the back.

Analysis of the Structural Relationship among Learning Outcomes in Science Classes applying Universal Design for Learning (보편적 학습 설계를 적용한 과학 수업의 학습 성과에 관한 구조적 관계 분석)

  • Lee, Kyoeng-Ran;Back, Nam-Gwon;Park, Jong-Ho
    • Journal of Korean Elementary Science Education
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    • v.34 no.1
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    • pp.1-14
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    • 2015
  • The variety of learners include students with disabilities and general students, and an ongoing focus of inclusive education research is non-discrimination. As part of integrated education, UDL (Universal Design for Learning) for students with disabilities supports a practical approach, participation, and advancement to improve learning opportunities for all students. The purpose of this study was to examine the effects of using UDL in science classes. The dependent variables of this study were academic achievement in science, scientific attitude, and scientific motivation. In this study, the experimental groups were 9 people in the 5th grade and 11 people in 6th grade. The experimental groups were taught science class using UDL. In order to analyze the learning outcomes, the structure equation model was performed. The results of this study were as follows: First, the science achievement of learning outcomes of the science class applying UDL directly affected both scientific attitude and scientific motivation. Second, the scientific attitude of learning outcomes of the science class applying UDL directly did not affect scientific motivation. According to these results, learning outcomes for science achievement of the science class applying UDL showed that UDL affected both general students and students with disabilities. To summarize the analysis of learning outcomes, science achievement directly affected both scientific attitude and scientific motivation while scientific attitude did not affect scientific motivation. This study offered a specific implementation method for integrated education. Using the structure equation model for analyzing the effect has more significance.

An Analysis of Nursing Needs for Hospitalized Cancer Patients;Using Data Mining Techniques (데이터 마이닝을 이용한 입원 암 환자 간호 중증도 예측모델 구축)

  • Park, Sun-A
    • Asian Oncology Nursing
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    • v.5 no.1
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    • pp.3-10
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    • 2005
  • Back ground: Nurses now occupy one third of all hospital human resources. Therefore, efficient management of nursing manpower is getting more important. While it is very clear that nursing workload requirement analysis and patient severity classification should be done first for the efficient allocation of nursing workforce, these processes have been conducted manually with ad hoc rule. Purposes: This study was tried to make a predict model for patient classification according to nursing need. We tried to find the easier and faster method to classify nursing patients that can help efficient management of nursing manpower. Methods: The nursing patient classifications data of the hospitalized cancer patients in one of the biggest cancer center in Korea during 2003.1.1-2003.12.31 were assessed by trained nurses. This study developed a prediction model and analyzing nursing needs by data mining techniques. Patients were classified by three different data mining techniques, (Logistic regression, Decision tree and Neural network) and the results were assessed. Results: The data set was created using 165,073 records of 2,228 patients classification database. Main explaining variables were as follows in 3 different data mining techniques. 1) Logistic regression : age, month and section. 2) Decision tree : section, month, age and tumor. 3) Neural network : section, diagnosis, age, sex, metastasis, hospital days and month. Among these three techniques, neural network showed the best prediction power in ROC curve verification. As the result of the patient classification prediction model developed by neural network based on nurse needs, the prediction accuracy was 84.06%. Conclusion: The patient classification prediction model was developed and tested in this study using real patients data. The result can be employed for more accurate calculation of required nursing staff and effective use of labor force.

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Conservation of metal artifacts excavated from tumulus in Chodang-dong, Kangreung City (강릉시 초당동 고분 출토 금속유물 보존)

  • Yu, Jae-Eun
    • 보존과학연구
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    • s.21
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    • pp.77-99
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    • 2000
  • Tumuli located in Chodang-dong in Kangreung City are sitesexcavated by the Museum of Kangreung University in 1993.Ofthese sites, a gilt bronze crown and gilt bronze sword with ring pommel with a tri-leaf ornament were excavated from the B-16tumulus. Underneath the gilt bronze crown was the gilt bronzes word with ring pommel with tri-leaf ornament, and these artifacts were treated with Polyurethane foams on the spot followed by special measures for conservation. This manuscript describes measures for conservation andanalysis with regard to the gilt bronze crown, gilt bronze sword with ring pommel with tri-leaf ornament and gilt bronze beltornaments. Bronze on the gilt bronze crown was completely corroded, therefore it was consolidated together with soil in the back of the artifact with Paraloid B72 after cleaning. Polyurethanefoams bottom was finished by applying the mixture of Epoxy resinAW106 and HV935K with soil. On the sword with ring pommel, the wooden part of the hilt was coated with Paraloid B72 (in Xylene) and the blade was consolidated with Paraloid NAD-10 30% after desalting with Sodium sesquicarbonate method. The gilt bronzebelt ornaments were treated with 3% Benzotriazole, coated with Paraloid B72 and then joined by using Cyanlacrylate. Specimens for the gilt bronze crown and gilt bronze belt ornaments were produced and gilding layers were examined under a metallographic microscope. The gilt bronze crown and the gilt bronze belt ornament maintained relatively good gilding quality with uniform gilding layers. Analysis of wood for the sheath of the sword with ring pommel revealed it to be Juglans mandshurica. Further more, analysis of constituents for a blue colored grassbead from dissolution of Polyurethane foams found it to be from the $Na_2O$-CaO-$AI_2O_3$-$SiO_2$ family.

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Finite Element Analysis and Experimental Verification for the Cold-drawing of a FCC-based High Entropy Alloy (FCC계 고엔트로피 합금의 냉간 인발 유한요소해석 및 실험적 검증)

  • Cho, H.S.;Bae, S.J.;Na, Y.S.;Kim, J.H.;Lee, D.G.;Lee, K.S.
    • Transactions of Materials Processing
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    • v.29 no.3
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    • pp.163-171
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    • 2020
  • We present a multi-step cold drawing for a non-equiatomic Co10Cr15Fe25Mn10Ni30V10 high entropy alloy (HEA) with a simple face-centered cubic (FCC) crystal structure. The distribution of strain in the cold-drawn Co10Cr15Fe25Mn10Ni30V10 HEA wires was analyzed by the finite element method (FEM). The effective strain was expected to be higher as it was closer to the surface of the wire. However, the reverse shear strain acted to cause a transition in the shear strain behavior. The critical effective strain at which the shear strain transition behavior is completely shifted was predicted to be 4.75. Severely cold-drawn Co10Cr15Fe25Mn10Ni30V10 HEA wires up to 96% of the maximum cross-sectional reduction ratio were successfully manufactured without breakage. With the assistance of electron back-scattering diffraction and transmission electron microscope analyses, the abundant deformation twins were found in the region of high effective strain, which is a major strengthening mechanism for the cold-drawn Co10Cr15Fe25Mn10Ni30V10 HEA wire.

An Analysis of Change on the Apartment Unit Plans and the Interior Spaces Related to Women (여성관련 공간을 중심으로 본 서울지역 아파트의 공간구조 변화)

  • Choi, Byung-Sook;Park, Jung-A
    • Journal of the Korean housing association
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    • v.20 no.4
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    • pp.39-47
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    • 2009
  • The purpose of this study is to find out the changes on the metropolitan condominium apartment unit plans based on the interior spaces related to women such An-bang (master bedroom), bathroom and attached spaces to the master bedroom, living room, diningroom, kitchen, utility room, and balcony. This study used the content analysis method and space syntax. Contents were limited to the floor plans with 3 rooms type and about 105 m2 in the Korean apartment encyclopedia. The unit plans of 2,278, built from October 1975 to January 2008, were analyzed and basically SPSS package 16.0 was employed. The results were as followed. 1) Living room was a core space and an increasing tendency. After 2001, the design trend of living room connected with kitchen and dining room, and dining room changed into one space combining with women's working space such kitchen. It meaned women's working activities became into family public activities as to depending open access. 2) Kitchen had a characteristics that was connected to utility room or back balcony, and the number of extra kitchen increased. Also, the size of DK decreased, but utility size little increased. It was showed the characteristic of this space was still for women. 3) An-bang had a little strong characteristics of married coulpe or women's personal space with bathroom or dress room/powder room. 4) In addition, the values of integration and control of living room and DK were highest. It meant these space were centered in unit plans. Next, the An-bang and dress room/powder room were high. Utility room or balcony's were next, and these were women's working space. Therefore, family's public space was most important, and married couple or women's personal and working space were later in planning.

Measuring Tensions of Character Motions based on LMA (LMA를 기반으로 한 캐릭터 동작의 긴장도 측정)

  • Kwak, Chang-Sub;Kwon, Ji-Yong;Lee, In-Kwon
    • Journal of KIISE:Computing Practices and Letters
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    • v.14 no.5
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    • pp.532-536
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    • 2008
  • In this paper, we propose the method to measure tensions of character motions, using LMA (Laban Movement Analysis). Using tension values, we tan take advantage of them as a standard for synchronization of motion and BGM(Back Ground Music). In LMA, a motion is divided into 4 space-time factors which are called Efforts, and each Effort has two bases opposed to each other. We can analyze the motion by justifying which basis is stronger than the other in each Effort of motion. To measure quantitatively tension values, we propose some equations based on kinematics and dynamics. Then we can measure the tension value by the weighted sum of values calculated from those equations. Each weight can be determined by the optimization process which tries to minimize the difference between the calculated tension value and human's decision. The experimental result shows that the in creasing order of the motion tension value is similar to that of the tension score given by human.