• Journal of Korea Port Economic Association
• /
• v.28 no.4
• /
• pp.149-168
• /
• 2012

International trade is becoming more and more important in this age of globalization. In particular, It is very important to export for South Korea economy. An important factor in export performance is logistics firms' competitiveness and resources. Nevertheless, many scholars and researchers are overlooking the role of logistics firms in the export market. Most studies have focused only on the capability of export companies without considering the capacity of logistics companies. This paper is attempted to analyze the competitiveness of logistics which affect export performance. So this study adopts the moderated regression analysis. The results analysis shows that logistics firms' resource level were statistically significant on export performance. The moderating effect of logistics firms' resource level was found in the relationship between export performance and international orientation. Lastly, the moderating effect of the logistics services level on the relationship between export firms capacity and export performance was statically significant.

• Journal of the Korean Geotechnical Society
• /
• v.19 no.6
• /
• pp.189-206
• /
• 2003

During tunnel excavation in urban area a systematic monitoring is important for the purpose of determination of support type and quantity, as well as for the control of stability of both surface structures and the tunnel itself due to the frequently, and in many cases, abruptly changing ground condition. In Austria absolute displacement monitoring methods have replaced relative displacement measurements by geodetic methods to a large extent. Prompt detection of weak ground ahead of the tunnel face as well as better adjustment of excavation and support to the geotechnical conditions is possible with the help of the improved methods of data evaluation on sites. Deformation response of the ground to excavation starts ahead of the tunnel face, therefore, the deformation and state of the tunnel advance core is the key factor of the whole deformation process after excavation. In other words, the rigidity and state of the advance core play a determining role in the stability of both surface structures and the tunnel itself. This paper presents the results from detailed three-dimensional numerical studies, exploring vertical displacements, vector orientations and extrusions on tunnel face during the progressive advancement for the shallow tunnel in various geotechnical conditions.

• BMB Reports
• /
• v.29 no.1
• /
• pp.32-37
• /
• 1996

The cysteine 43, potentially important in the activity of O-acetylserine sulfhydrylase (OASS) from Salmonella typhimurium, has been changed to serine. This mutant enzyme (C43S) has been studied in order to gain insight into the structural basis for the binding of inhibitor, substrate and product. UV-visible spectra of C43S exhibit the same spectral change in the presence of OAS as that observed with wild type enzyme, indicating C43S will form an ${\alpha}$-aminoacrylate Schiff base intermediate. At pH 6.5, however, the deacetylase activity of C43S is much higher than wild type enzyme indicating that cysteine 43 plays a role in stabilizing the ${\alpha}$-aminoacrylate intermediate. The fluoroscence spectrum of C43S exhibits a ratio of emission at 340 to 502 nm of 16.9, reflecting the lower fluorescence of PLP and indicating that the orientation of cofactor and tryptophan are different from that of the wild type enzyme. The emission spectrum of C43S in the presence of OAS gives two maxima at 340 and 535 nm. The 535 nm emission is attributed to the fluoroscence of the ${\alpha}$-aminoacrylate intermediate. The visible circular dichroic spectrum was similar to wild type enzyme, but the negative effect observed at 530~550 nm and the molar ellipicity values for the mutant are decreased by about 50% compared to wild type enzyme. The circular dichroic and fluoroscence studies suggest binding of the cofactor is less asymmetric in C43S than in the wild type enzyme.

• Journal of the Semiconductor & Display Technology
• /
• v.12 no.4
• /
• pp.49-54
• /
• 2013

In this study, we have investigated the effect of the substrate temperature and oxygen flow rate on the characteristics of IZO thin films for the OLED (organic light emitting diodes) devices. For this purpose, IZO thin films were deposited by RF magnetron sputtering at room temperature and $300^{\circ}C$ with various $O_2$ flow rate. In order to investigate the influences of the oxygen, the flow rate of oxygen in argon mixing gas has been changed from 0.1sccm to 0.5sccm. IZO thin films deposited at room temperature show amorphous structure, whereas IZO thin films deposited at $300^{\circ}C$ show crystalline structure having an (222) preferential orientation regardless of $O_2$ flow rate. The electrical resistivity of IZO film increased with increasing flow rate of $O_2$ under Ar+$O_2$. The change of electrical resistivity with increasing flow rate of $O_2$ was mainly interpreted in terms of the charge carrier concentration rather than the charge carrier mobility. The electrical resistivity of the amorphous-IZO films deposited at R.T. was lower than that of the crystalline-IZO thin films deposited at $300^{\circ}C$. The change of electrical resistivity with increasing substrate temperature was mainly interpreted in terms of the charge carrier mobility rather than the charge carrier concentration. All the films showed the average transmittance over 85% in the visible range. The current density and the luminance of OLED devices with IZO thin films deposited at room temperature in 0.1sccm $O_2$ ambient gas are the highest amongst all other films. The optical band gap energy of IZO thin films plays a major role in OLED device performance, especially the current density and luminance.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.9 no.1
• /
• pp.309-317
• /
• 2015

Recently many companies began to realize their visions for the sustainable growth with the advent of CSV(Creating Shared Values). Michael E. Porter, a Harvard Professor, claims that placing social value creation at the core of business strategy has the potential to uncover big opportunities for individual companies and that shared value can play a significant role in increasing competitive advantages while fostering social prosperity. In consequence, the various researches have illustrated how to get the opportunity for competitive advantages from building a social value proposition into corporate strategy, and considerable studies have been promoted heavily from the managerial perspective. However, due to the lack of capability converging information technology with business strategy, any research effort to identify technological or Internet-related issues and to link the issues to CSV does not exist. With Korean being a Internet leading country, the demands of researches analyzing core technology, information, and service utilizing Internet are rapidly growing. The study aims to find out Internet-related enablers for CSV. This paper describes the concepts and features of CSV, identifies emerging Internet-related issues toward the opportunity for competitive advantage, and then depicts the rigorous research endeavors in the areas of Internet information, technology, and services. As a result, 11 papers presented and selected as the outstanding papers at APIC-IST 2014 handle the issues to be brought together, which include: Wireless and Sensor Network, Image Processing and HCI, Big Data and Business Intelligence, Security & Privacy in Internet, SNS & Communication, Smart-Learning and e-Learning, and Internet Business Strategy. The study finally recommends indispensible terms for substantially vitalizing CSV.

• Korean Journal of Human Ecology
• /
• v.20 no.2
• /
• pp.327-338
• /
• 2011

In order to promote and comprehend marriage immigrants' culture, it is essential to understand the life of their families in their counties. For this study, data by a Philippine CFO(Commission on Filipino Overseas) has been analyzed, and the study researcher has attended an educational program run by the PDOS(Pre-Departure Orientation Seminar). Also, in order to understand the immigrants' families in their country, interviews have been done with some of the CFO employees, people arranged to immigrate to Korea through marriage, and female immigrants who are married. First, Filipino females have a positive attitude toward marriage with a foreign male. Most immigrants are from the rural parts of their country, and their families tend to rely on their daughters more than their sons. Therefore, they decide to marry Korean males and immigrate in order to support their families. However many of them do not have enough information about Korea. Second, Philippine's family system is of bilateral kinship, and traditionally, men and women are treated equally. Therefore, Filipino females tend to be well-educated, outgoing, and vibrant. Thus, they can create an active role in married life for themselves and support their family members. Lastly, based on videos and class materials on the topic of domestic violence that are used in the pre-educational programs for females planning to immigrate to Korea, the content of the program is to be revised.

• Archives of design research
• /
• v.16 no.1
• /
• pp.137-148
• /
• 2003

Environment-friendly design becomes one of the main issues of the contemporary design. It has been developed with the advent of the organic view of the wend. It started as the environment-protective orientation and then enlarged its boundary including the designs which aims to revive the organic relationship between human and nature. Recent design approach in environment design emphasizes to be 'synchronized with the nature' and its basic attitude is the revival of the right relationship between man and nature. It also can be described as the design for Green Amenity. This paper researches on the concepts, types and the roles of the environmentally-friendly design. There are two basic concepts : one is environment-protective attitude and the other is the attitude which emphasizes the function of Green Amenity. This paper focuses on the latter approach. Through the analysis of the necessity and the function of the environmentally-friendly design, it aims to prove the fact that valuable human life need the design which connects human life aye with natural environment.

• Design & Manufacturing
• /
• v.10 no.1
• /
• pp.19-25
• /
• 2016

Connectors are very important components that transmit electric signals to different parts. It must maintain intensity of the connector to prevent defects from impact and maintain contact to transmit electric signals. Most of the external parts of the connector, which act as the main framework, are formed by injection molding. However, bend deformation occurs for injection molded products due to the residual stress left inside the product after product molding. When the bend deformation is large, it does not come into complete contact when being assembled with other parts, which leads to connector contact intensity not being properly maintained. In result, the main role of the connector, which is to transmit electric signals, cannot be performed. In order to address this problem, this study conducted bend deformation cause analysis through bend deformation analysis to predict and prevent bend deformation of housings and wafers, which are injection molded products of pressure welded connectors that are normally applied in compact mobile and display products. Bend deformation analysis was carried out by checking the charging time, pressure distribution and temperature distribution through wire to board connector wafer and housing injection molding analysis. Based on the results of the bend deformation analysis results, the cause of the bend deformation was analyzed through deformation resulting from disproportional cooling, deformation resulting from disproportional contraction, and deformation resulting from ingredient orientation. In result, it was judged that the effects for bend deformation were biggest due to disproportional contraction for both the pressure welded connector wafer and housing.

• Journal of Astronomy and Space Sciences
• /
• v.34 no.4
• /
• pp.331-342
• /
• 2017

To ensure the successful launch of the Korea pathfinder lunar orbiter (KPLO) mission, the Korea Aerospace Research Institute (KARI) is now performing extensive trajectory design and analysis studies. From the trajectory design perspective, it is crucial to prepare contingency trajectory options for the failure of the first lunar brake or the failure of the first lunar orbit insertion (LOI) maneuver. As part of the early phase trajectory design and analysis activities, the required time of flight (TOF) and associated delta-V magnitudes for each recovery maneuver (RM) to recover the KPLO mission trajectory are analyzed. There are two typical trajectory recovery options, direct recovery and low energy recovery. The current work is focused on the direct recovery option. Results indicate that a quicker execution of the first RM after the failure of the first LOI plays a significant role in saving the magnitudes of the RMs. Under the conditions of the extremely tight delta-V budget that is currently allocated for the KPLO mission, it is found that the recovery of the KPLO without altering the originally planned mission orbit (a 100 km circular orbit) cannot be achieved via direct recovery options. However, feasible recovery options are suggested within the boundaries of the currently planned delta-V budget. By changing the shape and orientation of the recovered final mission orbit, it is expected that the KPLO mission may partially pursue its scientific mission after successful recovery, though it will be limited.

• Journal of Korean Society of Archives and Records Management
• /
• v.12 no.2
• /
• pp.143-161
• /
• 2012

In this study, the local archives suggested that consideration should be given to creating your strategy to the corridors of the local archives to Busan Sanbokdoro to build a acquisition of strategies to establish. First, the role of the local archives and organize the vision and goals of the Sanbokdoro archives. The residents of the region from the Sanbokdoro archives depending on the vision of the life orientation commands queue for archiving documentation strategies and acquisition plans were introduced. Sanbokdoro archives for specific topics, events, places, and so on, gather for a specific acquisition strategy and operating program through acquisition activities after the opening of the archives is to establish measures to acquisition the General acquisition.