• International conference on construction engineering and project management
• /
• 2007.03a
• /
• pp.19-29
• /
• 2007

This paper shares our project management experience in the 2 large-scale projects in managing a diverse international project team of consultants and managing in a foreign land. The first part introduces the two projects, second part addresses management of the projects and the last portion presents some of the challenges we experienced and highlights the importance of understanding the peculiarities of the operating environment, their norms, cultures, effectiveness and limitations of conventional project management tools while operating in a foreign country.

• Journal of Information Technology Applications and Management
• /
• v.20 no.4
• /
• pp.293-313
• /
• 2013

Preproject phase is an important but often ignored research area in information systems field although it has an undeniable importance for successful project. The purpose of this study is to identify factors affecting project performance in preproject phase and to find empirically critical factors among them. After deriving 9 factors through literature review including clear project definition, project leader position, staffing efforts, preproject team expertise, preproject knowledge scope, preproject partnering, top-management support, resource sufficiency, and project climate, the study investigate the influence of those factors on project performance. The study results reveal that clear project definition, project climate, resource sufficiency, pre-project knowledge scope, project leader position have significant impact on project process satisfaction, a measure of project performance, but the other factors do not. Based on the empirical results, the study discuss academic and practical implications.

• Journal of Broadcast Engineering
• /
• v.13 no.5
• /
• pp.636-650
• /
• 2008

DTV has a great advantage as compared to Analog TV in picture quality under low reception field strength. Various high quality tuners have been developed to result in much smaller Noise Figure of the receivers and many trials for receiving DTV signal through indoor antenna. In this paper, results of intensive field tests on the indoor reception of DTV are presented. Tests were carried out around Seoul-Gyeonggi Metropolitan area. Commercial directional and omni-directional antennas and 5th generation receiver were used for reception availability tests. The effects of heights, locations, and types of the house as well as the distance to the transmitter on the reception performances are analyzed. Our test results will be applied to improve the indoor reception environment of DTV.

• The Journal of the Korea Contents Association
• /
• v.16 no.12
• /
• pp.695-706
• /
• 2016

The present study sought to shed light on specific designs and strategies by investigating the impact that team project-based learning approach using Naver Band had on learning outcomes specifically, on satisfaction and achievement. Variables of perceived usefulness and perceived ease of use were chosen as critical predictors of the learning outcomes. 70 undergraduate students were divided into 18 groups and instructed to work on a team project using Naver Band for 6 weeks. Data analysis was completed using descriptive statistic analysis, correlation analysis, hierarchical regression analysis. Also, descriptions of Band from team reflection journal were analyzed. The major results of the study are as follows: first, perceived usefulness was the significant predictor of satisfaction and achievement. Second, 5 functions were revealed as strengths about Band.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.21 no.1
• /
• pp.8-16
• /
• 2017

Structural integrity of solid rocket depends on the residual reactions between constituents of its composition(post cure, migration etc.), the oxygen(or anti-oxydent) in the free volume and humidity (desiccant) under the perfect sealed condition. Mechanical Properties of composite solid propellant arising from those factors are very complex. Moreover the propulsion are faced with thermal loads from diurnal & seasonal cycle till firing. In this study, the fast evaluation method of long term mechanical properties is suggested based on Thermo-Rheological Simplicity from curing oven to cool-down stage in view point of thermal stabilization. For this subject, endurance tester having temperature control capability are devised. From the results from incremental load and strain, non-linear characteristics are discussed.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.22 no.1
• /
• pp.7-15
• /
• 2018

In this study, AOT that is used as a surfactant in various industries was applied to an HTPB/AP solid propellant. AOT is one of the anionic surfactants, and there have been cases where AOT was reported to induce self-extinguishable properties in propellants overseas. In this study, solid propellants using AOT were prepared, and their properties and combustion characteristics were investigated. The combustion rate of the AOT-applied propellant drops sharply when the pressure reaches a certain value during combustion. Further, the density and hardness of the propellant are lower than those of conventional HTPB/AP propellants.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.22 no.2
• /
• pp.367-377
• /
• 2012

(Estimating Compensation for Personal Information Infringement) As the value of personal information increases, personal information infringements is more likely to happen. The compensation for personal information infringements needs to be calculated in the process of infringement remedy. However, as personal information is regarded as non-market goods with no exchange price and calculating the remedy for mental sufferings from infringements has no guideline, it is not easy to determine the compensation amount. In this study, we adopt Contingent Valuation Methods (CVM) to analyze Willingness to Accept (WTA) of each type of personal information. Also, this study attempts to examine a standard model for calculating compensation by applying JNSA JO Model of Japan, which is not prepared in Korea. This study does not simply present a plan of estimating compensation. By measuring the value of personal information, it could awaken companies and organizations to the importance of personal information security.

• Journal of Integrative Natural Science
• /
• v.17 no.2
• /
• pp.59-65
• /
• 2024

Dendritic cells play a very important role in the immune response as antigen-presenting cells that are critical for initiating both innate and acquired immunity. They recognize, process and present foreign antigens to other key immune cells to trigger and regulate the immune response. The ability to activate these dendritic cells can be used as a treatment for various immune diseases. Maqui berry has been reported to have anticancer, antibacterial and anti-inflammatory properties. However, its effect on the activity of dendritic cells has not been studied. In this study, we investigated the efficacy of maqui berry extract in modulating dendritic cell activity. Treatment of dendritic cells with maqui berry extract induced the costimulatory molecules CD80, CD86, and MHC class I and II in a concentration-dependent manner. Furthermore, the antigen-presenting capacity of dendritic cells was inhibited, which confirms their ability to present antigens, and the production of Interleukin (IL)-12, which is important for dendritic cell activity, was increased. These results indicated that Maqui berry extract activates dendritic cells maturation by inducing the production of co-stimulatory molecules and IL-12. These results suggest that maqui berry extract may act as an effective adjuvant to enhance dendritic cell-based immune responses.

• Journal of Digital Convergence
• /
• v.16 no.1
• /
• pp.317-325
• /
• 2018

A satisfactory ending of the project is crucial for the students to achieve success experience. In this study, we analyze the teams' dismantling before the project deadline. We propose a team dissolution model based on the assumption that the disharmony caused by the members' personality traits is the main reason for the team break up. The Dark Triad and the Communion are introduced to build the model. We simulated the proposed model using an agent-based simulation and analyzed the results. We found that the ratio of owning DT impacts the maximum allowable size of the team and the team's rate of dissolution, but the team has been able to reduce the team's dissolution rate by increasing the team's harmony. We expect that we efficiently used the developed model with the agent-based simulation for the studies related to the dismantling of teams.

• International conference on construction engineering and project management
• /
• 2015.10a
• /
• pp.6-9
• /
• 2015

Traditional project management theory is based on a three-dimensional life cycle approach where the project managerseeks to optimize the dimensions of cost-schedule-technical (quality or design). This paper reports the findings of a case study analysis of two complex mega-projects in Michigan which confirm the findings of previous research and illustrates the use of a framework for five-dimensional project management (5DPM) that is for conceptualizing a complex project's scope of work. The framework elevates the recognition that the project's social/political context and the financial arrangements create complexity adding two new dimensions. This paper also demonstrates a methodology to graphically display a project's complexity to better understand and prioritize the available resources. The result is a "complexity footprint" that may help a complex project manager identify the boundary between controllable and uncontrollable projects impacts. The paper finds that applying 5DPM to the two case study projects has given the project delivery team a tool which is actually adding value to the complex project management process.