• Title/Summary/Keyword: Experimental plans

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The Analysis of Cognitive and Affective Effects on the CT-CPS Instructional Model for the Software Education Class in Middle School (중등 소프트웨어 수업에서 컴퓨팅 사고력 기반 창의적 문제해결(CT-CPS) 수업모형의 인지적·정의적 효과성 분석)

  • Jeon, YongJu;Kim, TaeYoung
    • The Journal of Korean Association of Computer Education
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    • v.20 no.4
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    • pp.47-57
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    • 2017
  • The purpose of this study is to verify the effectiveness of a CT-CPS(Computational Thinking-based Creative Problem Solving) instructional model on the cognitive and the affective area of middle school students' software class. To achieve our goal, we explored theoretical background and designed a lesson plan based on CT-CPS instructional model. Then we analyzed our experimental results after applying the lesson plan to middle school students. We performed our experiment to an experimental group by using our CT-CPS instructional model-based lesson plans, and we carried out three pre and post tests about cognitive and affective area, i.e. creative problem solving ability, meta cognition and motivation of learning. As a result, most of the test factors were statistically improved, so the effectiveness of the CT-CPS instructional model on the cognitive and the affective area of middle school students' software class was verified.

A Study on the Application of Infill Components in Open Housing (오픈하우징의 Infill 적용에 관한 연구 - 가동경량칸막이벽체의 시험시공을 중심으로 -)

  • Lee, Sung-Ok;Kim, Soo-Am;Lim, Seok-Ho;Hwang, Eun-Kyoung
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2005.11a
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    • pp.167-170
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    • 2005
  • This study aims to develop a detachable 'Infill Components' applicable to open housing. Recently, the need for innovative housing methods is increasing because of the environmental preservation issues and the need for favorable housing stock resulting from the increased housing supply ratio. In order to maintain favorable housing stock, there has to has a to be a shift from typical plans and construction methods for mass production to those with some identity, which may satisfy various needs of dwellers. In this light, the Ramen structure has become popular owing to the growth of remodelling market, and construction companies tend to adopt flexible type multi-family housings to increase sales by appealing to their customers. However, there are few domestic studies on the Infill components for the change of structure. As a result, further studies may have to be based on the case study. The purpose of this research is to provide fundamentals for the development of infill components corresponding to the structural change, especially for the development of partition walls that can be easily moved by dwellers. By reviewing problem of construction, arrangement of the movable partition wall system and door system which has within wring in the first Experimental Open Housing in Korea at KICT(KOHP21), this research provides the fundamentals for developing a movable partition wall acceptable to the dwellers who may want to remodel the interior to meet the needs of themselves.

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A Study on the Development Plans of Social Enterprises by Regional Comparison of Growth Decisions (사회적기업의 성장결정요인의 지역별 비교를 통한 발전 방안에 관한 연구)

  • Ham, JaeBong;Yoon, BokMan;Park, Keun
    • Journal of Korea Society of Industrial Information Systems
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    • v.25 no.2
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    • pp.101-113
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    • 2020
  • Since the number of social enterprises have been increased more than double over the past five years, the determinant of their growth by regional comparison is examined in this paper. In terms of the sale determinant, experimental results show that the total number of workers, business history, and capital intensity in Seoul metropolitan area, the total number of workers, business history, and capital intensity in Gyeongsang area, the total number workers, business history, and the dependence on government subsidies in Chungcheong area, the total number of workers, and the capital intensity in Jeolla/Jeju area have showed positive effects. In terms of asset determinants, experimental results show that the total number of workers, business history, and capital in Seoul metropolitan area, the capital in Gangwon area, the total number of workers, business history, and capital in Gyeongsang area, the total number of workers, business history, and capital intensity in Chungcheong area, the total number of workers, capital, and capital intensity in Jeolla/Jeju area have showed positive effect.

Behavior of L-shaped double-skin composite walls under compression and biaxial bending

  • Qin, Ying;Chen, Xin;Xi, Wang;Zhu, Xingyu;Chen, Yuanze
    • Steel and Composite Structures
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    • v.37 no.4
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    • pp.405-418
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    • 2020
  • The application of double-skin composite wall should meet different layout plans. However, most available research focused on the rectangular section with uniform axial compression. In this research, the structural behavior of double-skin composite wall with L section was studied. Due to the unsymmetric geometric characteristics, the considered loading condition combined the axial compression and biaxial bending. Five specimens were designed and tested under eccentric compression. The variables in the test included the width of the web wall, the truss spacing, the thickness of the steel faceplate, and the thickness of the web wall. The test results were discussed in terms of the load-displacement responses, buckling behavior, stiffness, ductility, strength utilization, strain distribution. Two modern codes were employed to predict the interaction between the axial compression and the biaxial bending. The method to calculate the available bending moment along the two directions was proposed. It was found that CECS 159:2004 offers more suitable results than AISC 360.

Navigation Trajectory Control of Security Robots to Restrict Access to Potential Falling Accident Areas for the Elderly (노약자의 낙상가능지역 진입방지를 위한 보안로봇의 주행경로제어)

  • Jin, Taeseok
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.6
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    • pp.497-502
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    • 2015
  • One of the goals in the field of mobile robotics is the development of personal service robots for the elderly which behave in populated environments. In this paper, we describe a security robot system and ongoing research results that minimize the risk of the elderly and the infirm to access an area to enter restricted areas with high potential for falls, such as stairs, steps, and wet floors. The proposed robot system surveys a potential falling area with an equipped laser scanner sensor. When it detects walking in elderly or infirm patients who in restricted areas, the robot calculates the velocity vector, plans its own path to forestall the patient in order to prevent them from heading to the restricted area and starts to move along the estimated trajectory. The walking human is assumed to be a point-object and projected onto a scanning plane to form a geometrical constraint equation that provides position data of the human based on the kinematics of the mobile robot. While moving, the robot continues these processes in order to adapt to the changing situation. After arriving at an opposite position to the human's walking direction, the robot advises them to change course. The simulation and experimental results of estimating and tracking of the human in the wrong direction with the mobile robot are presented.

A Study on the Remodeling of the Co-housing for Seniors Living Alone - Focused on the 'Carnation House' in Gyeounggi-do Area - (독거노인 공동생활시설의 리모델링에 관한 평가 연구 - 경기도 지역 사례를 중심으로 -)

  • Moon, Ja-Young;Hwang, Yeon-Sook
    • Korean Institute of Interior Design Journal
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    • v.25 no.5
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    • pp.31-41
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    • 2016
  • The purpose of this study was to analyze the remodeling of Carnation House, examine the current state of the spatial remodeling, and propose the future direction of the spatial remodeling of communal life facilities for the elderly living alone. To this end, experimental investigation, photograph shooting, and interviews with managers were performed, and a remodeling analysis was conducted by comparing the data before and after the remodeling. The study results can be summarized as below. First, as there is no standard for the remodeling of communal life facilities for the elderly living alone, related guidelines should be provided in the near future. Second, more fundamental approach to the remodeling should be made considering medical services for the elderly's safety, universal design plans, lifestyles of the elderly, and their use behaviors. Third, as communal life facilities for the elderly living alone normally have small spaces due to the remodeling by change of use, variable spatial planning should be performed for the elderly to utilize communal life facilities as multi-purpose and multi-functional spaces. Fourth, as the terrace space is an essential remodeling space needed for the elderly's rest, communication, and creation of profits, its remodeling should be realized in such a way that various programs can be utilized. Fifth, it turned out that the exterior remodeling could change the overall image of the facilities through new materials and colors.

Effects of Children's Poem Composing Activity done with Nature Experiencing Program on Language Expression and Peer Interaction (자연체험을 활용한 동시 짓기 활동이 언어표현능력과 또래상호작용에 미치는 영향)

  • Seo, Hyun;Jung, Eun Sook;Park, Mi-Ja
    • Korean Journal of Human Ecology
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    • v.21 no.5
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    • pp.875-888
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    • 2012
  • This study seeks to determine children's poem composition through an activity-based nature experiencing program and how it affects their language expression and peer interaction. This research also seeks to provide preliminary data for producing more effective lecturing and learning plans. The forty participants in the study included twenty 5-year-old children from E kindergarten and 20 5-year-old children from G kindergarten in N city. The results of the study demonstrated that children in the experimental group who experienced the poem composing activity with the nature experiencing program demonstrated a positive effect in terms of the quality of language expression as well as peer interaction. These results indicate that children's poem composing activity done with nature experiencing program could be used as a new lecture and learning method for the development of language expression and peer interaction in early childhood education.

Performance Improvement of Single-phase PLL Control using State Observer (상태관측기를 이용한 단상 PLL제어의 성능 개선)

  • Hwang, Hee-Hun;Choi, Jong-Woo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.2
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    • pp.96-104
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    • 2009
  • This paper proposes a single-phase Phase-locked loop (PLL) of the virtual two phase generator using full-order state observer, which is essential to find phase and frequency of the single-phase source. The conventional methods cannot remove the low-order harmonics included in source voltage, which influencesto whole PLL control system. The proposed algorithm separates fundamental wave from harmonics, and removes harmonics effectively. Therefore it generates only the fundamental wave. As it controls virtual voltage and input voltage together, it decreases steady-state error. From simulation and experimental results, the generated frequency by the proposed PLL which it plans, converges to the actual value, and the steady-state error is much reduced under given harmonic voltages. It is also confirmed that the proposed algorithm removed harmonics effectively and it generates only the fundamental wave.

A Study on Production and Digitalization of Thematic Maps (주제도 수치지도 제작방법에 관한 연구)

  • 김영표;조윤숙
    • Spatial Information Research
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    • v.6 no.1
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    • pp.103-120
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    • 1998
  • "The Plan for the Development of the National Geographic Information System" designates the following six major thematic maps as the main subject of digital mapping project: topographic-cadastral maps; administrative boundary maps; land use maps; road network maps; national land zoning maps; and urban planning maps. Carrying out the digital mapping project requires standards and guidelines for digitizing process. However, there is neither standards nor guidelines with regard to thematic map production. This study describes the steps involved in producing thematic maps and provides the best procedural alternative for the production of thematic maps. Based on procedural alternative suggested by this study, actual digital maps have been experimentally produced for the selected area, Anyang-Si Dongan-Gu. The results of this experimental work have been utilized to government for not only making the guidelines but also initiating plans for the development of thematic map production.roduction.

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The Polishing Characteristics and Development of Ultrasonic Polishing System (초음파 폴리싱 시스템의 개발 및 특성)

  • Moon, H.H.;Park, B.G.;Kim, S.C.;Lee, C.H.
    • Proceedings of the KSME Conference
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    • 2003.04a
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    • pp.1014-1020
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    • 2003
  • We have developed the ultrasonic polishing system to get super finishing that consist of machine part that can rotate and travel the main shaft with power 1.5kW, ultrasonic generator with frequency 20kHz. By using this system we were investigated the characteristics of ultrasonic polishing and deduced the major facters which affect the surface roughness by the experimental plans for three different materials such as ceramic, glass, and wafer, and so could be obtained following results. We could be obtained the excellent surface for hard-to-difficult cutting materials. The rotating speed could be found to be major factor influencing the surface roughness. In the case of ceramic and wafer, we were able to obtain good surface roughness when the feed rate and ultrasonic output is higher. In the case of glass, the surface roughness becames worse when ultrasonic output is higher because of increasing of load affacting on the particles in slurry.

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