• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.36 no.3
• /
• pp.15-34
• /
• 2004

Diverse benefits such as reduction of fresh water consumption and effluent discharge, efficient use of raw materials and energy savings can be obtained by papermaking system closure. Closure of papermaking processes, however, causes many problems including reduction of the efficiency of additives, decrease of retention and dewatering, felt plugging, poor Paper quality, generation of slime and odor, poor vacuum efficiency, etc, and it has been recognized that accumulation of Inorganic and organic substances in the process white water is the prime cause of these problems. Therefore, technological developments for preventing accumulation of these detrimental substances are urgently required for Implementing papermaking system closure. Understanding of the accumulation phenomena of the inorganic and organic substances in the papermaking process white water is prerequisite for papermaking system closure. In this study a process simulation method was used to analyze the accumulation phenomena of anionic starch In the process white water as the closure level of a fine paper making process is increased. A pilot paper machine was used as a model process. Starch adsorption and desorption models were developed based on the concept of starch adsorption ratio, which was not considered in previous studies. Steady state simulation studies were carried out based on this model using a commercial simulator. In steady state simulation, the variation of dissolved starch concentration in each process unit was monitored as a function of white water usage for wire shower. The result of the steady state simulation showed that dissolved starch concentration and its increase ratio in Process units increased as white water usage ratio for wire shower increased.

• Proceedings of the Korea Association of Information Systems Conference
• /
• 2003.11a
• /
• pp.41-54
• /
• 2003

This study examines group process patterns when Instant Messaging is used for decision-making, and examines how these patterns are associated with creative solutions to problems. Our research suggests that certain communication behavior of a group, when appropriately organized, can enhance creative production of outcomes. A qualitative analysis is conducted on communication patterns based on text-based conversation protocols. Specifically, this research tries to extend existing studies on group-work by focusing on the interactive communication process among participants. Study results include that the production of creative outcome depends on the temporal sequence of discussion pattern among group members. (1) Appropriate control of the discussion process is essential to obtain a high level of performance. (2) It is also important to set up discussion rules and rules for the use of communication medium in the early stages of the discussion . (3) Active participants use various protocol types while less-active members rely mainly on 'cognitive' protocols.

• Journal of The Korean Digital Architecture Interior Association
• /
• v.13 no.1
• /
• pp.43-53
• /
• 2013

The purpose of this study is to propose the reasonable method for effective public building construction process. Public building service administration is necessary to make efficient public building supply and demand program. As a result, current public building precess need four steps(organize public assets, various process, establish public building service administration, design criteria). 1. Planning phase : Participation of Private Experts is guaranteed to enhance public building's function such as welfare, entertainment. 2. Design Phase : Detailed design review makes efficient and user oriented public building. 3. Construction Phase : Public Architect solve various problems among the participator especially in case of government local building construction. In conclusion, well formulated design criteria and Public building service administration make public building efficient in various field.

• Journal of The Korean Digital Architecture Interior Association
• /
• v.12 no.1
• /
• pp.25-33
• /
• 2012

Ever since the local interior and architecture design industry adopted Digital fabrication modeling tool for its design operation in early 1990's, working environment has been changing. The Purpose of study is to analyze the digital Architecture fabrication modeling for digital design education in academy course. Digital Design Tools, Digital Space and Form, Digital Materiality and Digital Production. The Digital fabrication modeling is and important role in a traditional design process and digital design process. It is comprised of digital input devices(3D digitizer, 3D design tools) and digital output devices(cutting plotters, laser cut, CNC machines, 3D printers). Digital input devices can be shift a traditional design process to digital design process. Digital output devices are the principle of digital fabrication by CAD/CAM. Also, the result of this study provide the fundamental data for physical resources and digital design curriculum in KAAB.

• Journal of The Korean Digital Architecture Interior Association
• /
• v.13 no.3
• /
• pp.33-40
• /
• 2013

The purpose of this study is to propose an curriculum for architectural studio in university to implement BIM process, through the analysis of the advantages of the BIM tool. The limitation of this study was to analyze the case study of only half year a single university. University education in the design process, the design that can be used in applying BIM content should be universal, university education considering the special working conditions, excessive BIM-based application can be difficult. Therefore, a systematic and reliable design that can be applied to education applies BIM design process is necessary to establish. University education applying BIM design review and design proposal the various 3D visualization can be used effectively to determine. In addition, the planned representation for thinking about and drawing 3D model building, architectural space can be used for visualization, and other subjects in conjunction with structural analysis, environmental analysis, facility layout, etc. can be used.

• Journal of The Korean Association For Science Education
• /
• v.12 no.3
• /
• pp.91-107
• /
• 1992

The Purpose of this study was to present the procedures and methods of ordering theory,and to search for a learning hierarchy among science process skills in each Piagetian cognitive reasoning level. One of the purpose of this is not to determine the clear and exact hierarchy but rather to demonstrate how ordering theoretic methods and procedures can be used to determine the hierarchy of logical relationships among a set of test items or the testing of a hypothesized hierarchy. Ordering theory was used to analyze five science process skills collected from 509 high school students. Ordering Theory has as its primary intent either the testing of hypothesized hierarchies among items at the determination of hierchies among items. Hierarchical relationships were identified within five science process skills. The results will be helpful in giving useful inform at ions to classroom teachers and science curriculum developer.

• Communications for Statistical Applications and Methods
• /
• v.27 no.1
• /
• pp.15-35
• /
• 2020

In research on behavioral studies, significant attention has been paid to the stage-sequential process for multiple latent class variables. We now explore the stage-sequential process of multiple latent class variables using the multivariate latent class profile analysis (MLCPA). A latent profile variable, representing the stage-sequential process in MLCPA, is formed by a set of repeatedly measured categorical response variables. This paper proposes the extended MLCPA in order to explain an association between the latent profile variable and the latent group variable as a form of a two-dimensional contingency table. We applied the extended MLCPA to the National Longitudinal Survey on Youth 1997 (NLSY97) data to investigate the association between of developmental progression of depression and substance use behaviors among adolescents who experienced Authoritarian parental styles in their youth.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2005.05b
• /
• pp.583-587
• /
• 2005

At present, various methods are available to analyze storm runoff data. Among these, application of Z-transform is comparatively simple and new, and the technique can be used to identify rainfall and unit hydrograph from analysis of a single storm runoff. The technique has been developed under the premise that the rainfall-runoff process behaves as a linear system for which the Z-transform of the direct runoff equals the product of the Z-transforms of the transfer function and the rainfall. In the hydrologic literatures, application aspects of this method to the rainfall-runoff process are lacking and some of the results are questionable. Thus, the present study provides the estimation of Z-transform technique by analyzing the application process and the results using hourly runoff data observed at the research basin of International Hydrological Program (IHP), the Pyeongchanggang River basin. This study also provides the backgrounds for the problems that can be included in the application processes of the Z-transform technique.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2005.05b
• /
• pp.1486-1490
• /
• 2005

지속가능한 수자원 개발 및 관리를 위해서는 유역 내에서 진행되고 있는 수자원에 관련된 활동들이 지속가능한 개발의 개념에 부합하는지 여부를 판단해야 한다. 이를 위해서는 국가, 유역, 지자체 등의 수문, 수질, 사회, 경제, 환경적인 요인들을 고려한 다변수 평가 지수가 필요하다. 본 연구에서는 유역의 수자원을 평가할 수 있는 지표들을 선정하고 이들 간의 중요도는 계층적 분석기법(Analytic Hierarchy Process, AHP)을 사용하여 산정하였으며 이들을 종합한 수자원 지속가능성 지수(WRSI, Water Resources Sustainability Index)를 개발하였다. WRSI는 경제적 효율성 세부지수, 사회적 공평성 세부지수, 환경 보전성 세부지수, 유지관리능력 세부지수로 구성하였다. 지표들과 세부지수들 간의 중요도는 전문가들에 대한 설문조사를 통하여 산정하였다. 개발된 WRSI 구성지표들의 표준화는 이들의 적정 확률분포를 선정한 후 누가확률을 사용하여 산정하는 방법을 개발하여 사용하였다.

• Journal of the Korean housing association
• /
• v.13 no.4
• /
• pp.67-73
• /
• 2002

The purpose of this study is to investigate the reflection degree of residents' opinions and their participation, on the premise that the reconstruction of apartments is a process of the concrete realization of residents' dwelling needs and of the recreation of living spaces. Here are some of results of this research; Although apartment residents who have experienced the process of reconstruction have a great desire to participate and a wide range of participation, the proper procedure of participation is not prepared and the contents of reconstruction is not fully understood. And the residents have the different opinions on 'height and mass of apartment' and 'amount of compensation and payment'. Meanwhile, the residents believe that all of them should take part in the participation process and some government interventions are needed. Accordingly, various ways for resident participation in the process of reconstruction are to be provided and new techniques for encouraging public participation are to be sought.