• Proceedings of the Korean Society of Propulsion Engineers Conference
• /
• 2010.11a
• /
• pp.581-584
• /
• 2010

Korea Aerospace Research Institute (KARI) started preliminary research about the propulsion system for lunar orbiter and moon lander this year in order to prepare korean moon exploration plan of 2020s. The final goal of this study is to develop a prototype propulsion system for lunar exploration and to perform ground landing test using this propulsion system. In this year, preliminary design of propulsion system and 200N class monopropellant thruster have been conducted. In this paper, the trade-off study result and the design concept of the propulsion system for Korean moon exploration will be introduced and preliminary design of propulsion system will be presented.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.9 no.3
• /
• pp.757-764
• /
• 2008

It is important to know the activities itself exactly and to control the activities correctly so as to assure timely progress and the quality of any project. In order to progress smoothly in accordance with construction schedule, it is important to systematize the preliminary arrangements necessary for each process and then manage them. In this study, in order to progress smoothly the qualify and schedule management of the construction, We can make systematically preliminary works in accordance with construction schedule by the architecture construction items of the apartment house construction. We suggested important preliminary control item by the workers through experiential method of construction engineers in accordance with network schedule. should not use "we" in technical sentence.

• Journal of Fashion Business
• /
• v.15 no.2
• /
• pp.131-144
• /
• 2011

The purpose of this study is to propose 3D art make-up design process by reproducing real objects through preliminary digital drawing with Photoshop (Photo Shop CS4.0, Adobe, USA) and using special make-up that has never been done previously, and produce creative problem solving plan to make concrete expanding thoughts and ideas. As for this study method, this study was composed of preliminary study, literature study by book examination and positive study on design process that performed preparatory work and reproduced real objects. Real case study by art make-up design process can improve effective design expressing ability by utilizing special make-up, diversify techniques, extend expression areas by materials, and create unique design. In addition, preliminary work by digital drawing, a process to predict real object work in advance, could reduce time and cost while improving work skill for work production, raise design accuracy and make easy the modification of idea. This study is anticipated to activate digital make-up by various digital techniques including Photoshop.

• The Journal of Information Systems
• /
• v.27 no.4
• /
• pp.149-165
• /
• 2018

Purpose As Korean economy has been sluggish in recent years, firms' interest in publicly financed projects has increased due to the relatively increasing proportion in the economy. Since 1999, publicly financed projects in Korea need to undergo preliminary feasibility study to evaluate economic efficiency and policy quality if they are larger than a certain scale. The benefits of public projects are one of the most important factors in the preliminary feasibility study but are difficult to estimate due to their nature. Design/methodology/approach This study estimates the benefits of the agricultural soil information database, a public database in Korea. The method used in the study is the stated preference method which is formally used in Korea's preliminary feasibility study. Data are collected through surveys and a logit model is constructed to be estimated by the maximum likelihood estimation method. Findings As the first study evaluating a public database, this study can be used as a baseline in all public database projects developed in the future. In addition, this study can contribute to improving the understanding of both private companies and public organizations who are interested in the cost-benefit analysis and estimation procedure for the publicly financed projects.

• SUVANNABHUMI
• /
• v.15 no.1
• /
• pp.229-254
• /
• 2023

This study observes the language attitude and maintenance of the border community in Telok Melano, Lundu (Sarawak, Malaysia) and Desa Temajuk, Sambas (West Kalimantan, Indonesia). The main objective of this study is to study the language attitudes of two cross-border community who shares the socio-cultural, language, and economic realms. The research data is collected qualitatively through conversation recordings, face-to-face interviews, and participant observations. In this preliminary study, twelve informants (six from Telok Melano and six from Desa Temajuk) were chosen based on the quota sampling method. The questions for the interview were set according to three characteristics of language choice proposed by Garvin and Mathiot (1968), namely language loyalty, language pride, and the awareness of norms. The result of this study indicates that language loyalty, language pride, and awareness of the norms towards the speakers' mother tongue and national language are relatively high. In terms of identity maintenance issues, this study found that the community in Telok Melano (Sarawak), originally identify themselves as "Sambas Malays," shifted to "Sarawak Malays" after the formation of Malaysia in 1963. This preliminary study serves as a basis for further research particularly on the complexity of issues concerned with the border communities in the Southwest of Sarawak.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.13 no.1
• /
• pp.89-104
• /
• 2018

The purpose of this study is to examine the relation between entrepreneurial self-efficacy and entrepreneurial intention, and analyze how social support gained through social relations influences on the relation between entrepreneurial self-efficacy and entrepreneurial intention. This study outcome is as in the following. First, both general corporate and preliminary social entrepreneur are to examine that entrepreneurial self-efficacy positively influences the entrepreneurial intention. Second, in the case of the social support, it didn't influence on preliminary general corporate. And only feedback support and instrument support are related to influence on preliminary social entrepreneur among social supports. This study shall have a significance in using the result of previous studies that entrepreneurial self-efficacy influences on entrepreneurial intention by looking into moderating effect of social support, classifying general corporate and preliminary social entrepreneur who have the entrepreneurial intention.

• Journal of KIBIM
• /
• v.3 no.1
• /
• pp.11-20
• /
• 2013

Mix-used development in urban renewal project is done to effectively utilize the limited downtown. Generally unlike a single project, It features placing a large number of different facilities(residential, commercial, business, cultural, etc.) which is each other organically linked. The purpose of this study is to suggest the method of modeling guide for 3D preliminary cost estimation considering visual and intuitive judgement of space in mix-used development Urban Renewal project. In this research, introducing SME(Standard Module and Element) breakdown structure, FID(Finish Identity) for estimating building space unit-based quantity take off was implemented. It could narrow the discrepancy of opinion between the stakeholders with more accurate cost-estimates, comparing to the traditional methods.

• The KSFM Journal of Fluid Machinery
• /
• v.14 no.1
• /
• pp.18-23
• /
• 2011

The hydraulic part in reactor coolant pump consists of suction nozzle, impeller, diffuser, and discharge nozzle. Among them, impeller is required to be designed to satisfy performance requirements such as head, NPSHR, and head curve slope at design point. Present study is intended to suggest the preliminary design method sizing the impeller size to satisfy the design requirement particularly including head curve slope at design point. On a basis of preliminary design result, hydraulic components have been designed in detail by CFD and then manufactured in a reduced scale. Experiment in parallel with computational analysis has been executed in order to confirm the hydraulic performance. Comparison results show good agreement with design result, confirming the validity of design method suggested in this study.

• MALSORI
• /
• no.53
• /
• pp.17-35
• /
• 2005

A New Method of Extracting the Filter Characteristics of the Nasal Cavity Using Homorganic Nasal-Stop Sequences: A Preliminary R eportHansang ParkThis study provides a new method of extracting the filter characteristics of the nasal cavity. Korean lenis stops are realized as voiced in the homorganic nasal-lenis stop sequences between vowels. Since the only difference between the two members of the homorganic nasal- lenis stop sequences, such as [mb], [nd], and [ g], is whether the passage to the nasal cavity is open or not, the subtraction of the LPC spectrum of the voiced stop from that of the preceding nasal leads to the filter characteristics of the nasal cavity of an individual speaker regardless of place of articulation. The results suggest that various attempts should be made to extract a robust filter characteristics of the nasal cavity by giving variation to LPC coefficients and by paying particular attention to speech samples. This study is significant in that it provides a preliminary report about a new method of extracting the filter characteristics of the nasal cavity.

• Journal of Aerospace System Engineering
• /
• v.1 no.1
• /
• pp.36-44
• /
• 2007

This study was performed on preliminary structural design of a small scale WIG craft which has been developed as a next generation high speed maritime transportation system in Korea. A composite structure design using the foam-sandwich for main wing and tail fins and the honeycomb sandwich and skin-stringer-ring frame for fuselage was applied for weight reduction as well as structural stability. A commercial FEM code, NASTRAN for was utilized to confirm the structural safety for the reiterate design modifications to meet design requirements including the target weight. Each main wing was jointed with the fuselage by eight high strength insert bolts for easy assembling and disassembling as well as for assuring the required 20 years service life. For control surface structural design, the channel type spar, the foam sandwich skin and the lug joint were adopted.