• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2001.09a
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• pp.231-234
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• 2001

When constructing subsurface structures and/or wells, the precise estimates of hydraulic parameters must be obtained for operating safety and/or for developing necessary quantity of groundwater. Hydraulic conductivity is mainly subjected to the characteristics of fracture network in the fractured media such as fracture orientation and angle, fracture aperture and frequency, fracture length, interconnectivity of fractures, and filling material, feature of fracture plane. In this study we conducted water injection test at afferent depths on six boreholes drilled in granite of Mt. Geumjeong. hydraulic conductivity was calculated using Moye and Hvorslev methods. The relation between hydraulic conductivity and fracture frequency data obtained from acoustic televiewer and core log were analyzed. The result shows that the correlation between the hydraulic conductivity and the fracture frequency data obtained from acoustic televiewer is better than that with the core log.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.4 s.33
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• pp.69-73
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• 2004

A series of $H_3PO_4$-doped composite membranes based on poly(vinyl alcohol)(PVA) and silica have been prepared by sol-gel process. The proton conductivity, as well as properties of swelling, methanol permeation, was measured in this study. The proton conductivity increased with the molar ratio of $H_3PO_4$ to silica. With the silica content increasing, swelling degree decreased and methanol permeability showed a slight increase. It suggested that the former was mainly determined by hydrophilicity of the membrane, while the latter was dominated by the interconnectivity of matrix. According to the value of on, the optimal conformations of these composite membranes were 60, 70, 80 wt.$\%$ of PS-x in membranes, where x were 1.5, 1.0, and 0.5, respectively. These composite membranes were thermal stability up to $200^{\circ}C$.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1409-1410
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• 2008

Layer manufacturing technology has been recently spotlighted as a promising candidate to fabricate porous scaffolds for tissue engineering, because it can provide three dimensional interconnectivity and different pore structures and on-demand scaffold design. This study aims to fabricate HA/PCL composite scaffolds for bone tissue engineering by a layer manufacturing technology, paste extruding deposition, and to characterize in vitro and in vivo biocompatibilities of the scaffolds. This study discusses the mechnical properties, proliferation and differentiation of osteogenic cells, and tissue in-growth and bone regeneration behavior using animal models.

• Asian review of World Histories
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• v.3 no.1
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• pp.59-80
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• 2015

The paper is oriented towards a reflection on the epistemological extension of world history. This discipline is currently opening up for new subjects and new foci of interest, with environmental history being one of them. The paper debates the interaction between the global and the local as one of the main issues of world history. It analyses the impacts of the interconnectivity of diverse regions as well as different geographical and cultural complexes, during the period between 1500 and 1800. Assuming that the sea in its economic, cultural and environmental dimensions contributed actively to world history, and is, in itself, a major factor of globalization, the paper intends to highlight interdependencies which fostered connections between the local and the global. It further submits to discussion which was the impact of an on-going globalization process, based on maritime dynamics, on the environment. Through an analysis centered on the impact of European overseas expansion, some environmental impacts will be analyzed. The paper aims at questioning environmental history as an emergent theme of world history, based on the historical experience of connecting worlds developed in the First Global Age (1500-1800).

• Electronics and Telecommunications Trends
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• v.12 no.4 s.46
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• pp.21-30
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• 1997

일본은 TTC에 의해 제정된 표준을 기초로 하여 개발된 전기통신장비 또는 시스템의 상호접속성을 확인하기 위해, '고도 통신시스템 상호접속 추진회의(Promotion Conference of Harmonization of Advanced Telecommunication System: HATS Conference)' 를 설립하였다. HATS Conference에는 전기통신사업자, 표준화기관, 제조업자 등 여러 기관이 참여한 가운데, 상호접속성 대한 사용자의 요구사항과 기술적 문제를 다루기 위해 6개의 실무그룹과 디지털전화, 터미널 어댑터, 디지털 PBX, G4 팩스 등과 같은 장비 또는 시스템간의 실제적인 시험을 위해 상호 접속성 '시험구현연락회(Test Implementation Liaison Committee: TILC)' 가 구성.운영되고 있다. 따라서, 본 고는 HATS Conference가 주관하고 있는 전기통신장비 또는 시스템간의 상호접속성 시험체계를 분석한 것이다.

• Journal of the Korean Institute of Telematics and Electronics
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• v.26 no.12
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• pp.2039-2045
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• 1989

In this paper, we developed placement algorithm for drafting logic schmeatics. The algorithm of this system is to base placement on signal flow as opposed to connectivity. The key idea of this algorithm is that by dividing the schematic into simpler acyclic, uni-directional graphs, called tree. Then the components of tree and their interconnections have the characteristics that they can be laid out symmetrically without any crossovers. The interconnectivity between the trees are analyzed and a placement scheme is determined for them. Also, the trees are expended into their respective components. This algorithm is divided into four main phases: Initiate, Divide, Merge, Placement.

• Journal of the military operations research society of Korea
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• v.23 no.1
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• pp.100-114
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• 1997

The network for proving information exchange function in distributed system is interconnected among other networks which are in the state of independent construction and operation. However, due to various network protocols and distributed applications, Problems occurred in the area of network interconnectivity and interoperability of distributed applications in internetworking which should provide a good interoperability. This paper proposed an improved method for finding route which has the highest interworkability between end-systems using the interrelationship of network protocol. An algorithm and method of constructing a virtual network which is suitable for required distributed application are also proposed in this research.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.101-102
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• 2006

Processing techniques for producing microcellular silicon carbide, mullite, and cordierite ceramics have been developed by a reaction method that incorporates a polysiloxane and reactive fillers. The techniques developed in this study offer substantial flexibility for producing microcellular ceramics whereby cell size, cell density, degree of interconnectivity, composition, and porosity can all be effectively controlled. It is demonstrated that the adjustment of filler composition enables the possibility of tailoring the composition and properties of the microcellular ceramics. The present results suggest that the proposed novel processing techniques are suitable for the manufacture of microcellular ceramics with high morphological uniformity.

• Proceedings of the KOSOMBE Conference
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• v.1996 no.05
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• pp.221-222
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• 1996

In order to prepare the porous hydroxyapatite (HA) ceramics with different porosity, interconnectivity, mechanical properties, surface chemistry and tissue response, several methods have been developed. Of the different forms of Porous HA ceramics which were prepared by various methods, only the coralline HA has undergone major clinical applications in orthopaedic, maxillofacial and ophthalmic surgery. In this study, totally synthetic macroporous HA ceramics with various pore size distribution were prepared. It is shown that the new reticulate HA ceramics, comprised of interconnected voids surmunded by a web of ceramic, have a morphology which mimics that of human trabecular bone.

• Journal of Multimedia Information System
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• v.9 no.1
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• pp.43-50
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• 2022

As the discourse on Anthropocene grows, this exploratory research investigates the interrelationship and interconnectivity between humanity and technology by analyzing a sound art installation created by the author. Crying Sea is a sound installation that uses plastic wastes collected from the shore to create symbolic narratives and artistic experience connecting humans, objects, and nature through interactive digital technology. In this installation, the audiences are guided to walk over the wastes, and the sounds created by the footsteps are recorded in real-time, which then are distorted and amplified into disturbing sounds through speakers filling up the room. In analyzing this artwork, three theories from technological, philosophical, and ecological backgrounds were used; specifically, Bernard Stiegler's pharmakon theory, Dona Haraway's cyborg manifesto, and Timothy Morton's dark ecology theory. A common factor revealed from all three theories by analyzing the Crying Sea is that humans, technologies, and all other entities within nature are interconnected and resonated. The awareness of this recursive relationship allows us to consider sustainable balancing.