• Journal of Conservation Science
• /
• v.36 no.3
• /
• pp.197-212
• /
• 2020

This study analyzed the microstructure of ring-pommel swords, excavated from Ancient Tombs, Hadae, Ulsan and examined their production technique, using non-destructive testing and a metallurgical method. The results confirmed that the five ring-pommel swords, unearthed in Ancient Tombs, Hadae, Ulsan, as identified by radiographic non-destructive testing, had been solely manufactured using iron, through forging based on the single-piece technique. Furthermore, these results were compared with previous studies, and the manufacturing techniques of single-piece ring-pommel swords were categorized into three types: pure iron - changing the shape, pure iron - changing the shape - carburization, and steel - changing the shape - quenching. The ring-pommels of four swords had around 0.7% of carbon content, which is as much as for eutectoid steel and higher than for other parts of these swords, such as the backs of their blades and handles. The weapon function of a small ring-pommel sword, under 60cm in length, was maximized by quenching focusing on its blade. Conversely, the martensite quenching structure was not observed in four ring-pommel swords shorter than 75cm. In other words, the same types of single-piece ring-pommel swords(late in 2C~early in 4C) were unearthed from Ancient Tombs, Hadae, and the group who has manufactured these swords is presumed to have limited their effectiveness, functionally depending on purposes, through an iron-making process and heat-treatment techniques.

• Journal of the Korean Society for information Management
• /
• v.40 no.2
• /
• pp.211-241
• /
• 2023

With rapidly changing technological implementation of operating systems of businesses, the Ministry of foreign affairs (MOFA) of the Republic of Korea (ROK) has been undergoing digital transformation to its overall operations with the intent to innovate information and knowledge management (IKM) strategies since the mid-2000s. However, assessment as to the effectiveness of implemented IKM has been inadequately analyzed. This study aims to assess the concepts and limitations of the MOFA's current IKM strategies and the methods it employs to deliver its IKM framework, in light of strengthening the organizational ambidexterity and absorptive capacity, and also fostering organizational innovation through a qualitative study that involves interviews and analysis of reports from MOFA. The MOFA's IKM possesses dynamic capabilities to adapt to changing digital technologies. However, the institution's IKM is constrained by limitations associated with the utilization of the IKM system such as a structure that handles confidential documents and a lack of a collaborative system for IKM, and external limitations such as changes in the domestic political situation governing MOFA's priorities and the hierarchy of government organizations. Consequently, developing the organizational ambidexterity and absorptive capacity was not possible. To develop an IKM framework for organizational innovation, the MOFA must devise a way to minimize the impact of external changes by overcoming internal limitations. To that end, a detailed study on the development of a practically usable IKM system should include establishing a dialogue between job groups and enhancing employee competency in preparation for a changing environment.

• KIPS Transactions on Software and Data Engineering
• /
• v.5 no.4
• /
• pp.187-194
• /
• 2016

When performing experiments in indoor and outdoor environment, we need a system that monitors a volunteer to prevent dangerous situations and efficiently manages the data in real time. We developed a guidance device for visually impaired person that guides the user to walk safely to the destination in the previous study. We set a POI (Point of Interest) of a specific location indoors and outdoors and tracks the user's position and navigate the walking path using artificial markers and ZigBee modules as landmark. In addition, we develop path finding algorithm to be used for navigation in the guidance device. In the test bed, the volunteers are exposed to dangerous situations and can be an accident due to malfunction of the device since they are visually impaired person or normal person wearing a eye patch. Therefore the device requires a system that remotely monitors the volunteer wearing guidance device and manages indoor or outdoor a lot of map data. In this paper, we introduce a managing system that monitors the volunteers remotely and handles map data efficiently. We implement a management system which can monitor the volunteer in order to prevent a hazardous situation and effectively manage large amounts of data. In addition, we verified the effectiveness of the proposed system through various experiments.