• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.11-12
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• 2013

It is required to response to the demand for new space due to high density of population and buildings in urban area. In particular, in case of big cities such as Seoul where the lack of new construction site due to the depletion of available space, existing buildings must be demolished for new construction. Utilization of urban underground space can be an alternative to solve for urban space problems. There are applications of underpinning methods using micropiles for existing buildings. Sometimes, the difficulties come from the compact space available for new foundation underneath the existing ones. In this paper, a novel underpinning method is introduced which can solve the space restriction problems underneath existing columns.

• Information and Communications Magazine
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• v.24 no.3
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• pp.5-14
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• 2007

NGN (Next Generation Network)은 현재 IP기반의 네트워크 기능을 효과적으로 수용하면서 기존의 IP 및 전기통신 서비스뿐만 아니라 앞으로 예상되는 IP 기반 서비스를 효율적으로 제공하기 위한 표준 네트워크 프레임워크라고 여겨진다. 이를 표준화하기 위하여 ITU-T SG13 및 NGN-GSI (NGN-Global Standards Initiative)에서 ITU-T의 관련 연구 그룹들이 참여하여 요구되는 네트워크 및 서비스의 표준화를 매우 적극적으로 추진하고 있다. 우리나라의 BcN도 ITU-T의 NGN 표준화 결과 및 국내 상황을 고려하여 표준모델을 설정하고, 이를 기반으로 IP 기반의 광대 역 고품질 네트워크 프레임워크 틀을 만들어 가고 있다. 본고는 이러한 국내외 상황을 고려한 BcN/NGN 표준화 동향 및 ITU-T NGN의 프레임워크 및 구조, NGN의 서비스 기능 구조, NGN의 자원 관리 및 제어, 유무선 통합 (Fixed Mobile Convergence) 및 NGN Security 구조 등의 표준화 동향에 대하여 기술한다.

• Journal of Pharmaceutical Investigation
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• v.8 no.1
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• pp.27-36
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• 1978

Spherical granules of anti-inflammatory enzyme were prepared by mixer granulation and the recovery rate of enzyme activity by processing was compared with tablet ones. In the enteric granule coating .processing, the effect of the amount of coating solution and the conentration of fatty alcohol on disintegration and stabilities on the accelerated conditions were also studied. Being prepared in non-pressure and non-aqueous condition, spherical granules of enzyme made better recovery of enzme activity than tablet ones by 10 times. Combined processing of both mixer granulation and enteric granule film coating provided the noble enteric coated granules, in the sense of disintegration and stabilities, was obtained from using 0.125% fatty alcohol in coating solution.

• Journal of Chest Surgery
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• v.35 no.6
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• pp.467-470
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• 2002

The most common primary heart tumor in infants is the rhabdomyoma. It is known that tuberous sclerosis is found in half of the patients with cardiac rhabdomyoma. Because the prognosis of this tumor associated with subaortic stenosis is poor, the surgical intervention is indicated. We report one case of left ventricular rhabdomyoma with tuberous sclerosis.

• Toxicological Research
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• v.12 no.1
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• pp.101-111
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• 1996

The local irritation studies of DA-3285, recombinant human erytropoietin(rHu-EPO), were carried out in rabbits after the following treatment; single application into the conjunctival sac of the eye, single subcutaneous injection, 7-day repeated subcutaneous injection and 8-day repeated infusion into the ear vein. Also, the local irritancy of DA-3285 leaked around vein was studied in mice by single perivascular injection. The results obtained were as follows. In the result of ocular irritation test, DA-3285 could be considered as a non-irritating material. In single and 7-day repeated subcutaneous irritation test, the irritancy of DA-3285 was not so much different from that of saline. The vascular irritancy of DA3285 by 8-day repeated infusion was negligible and similar to that of saline. And the irritancy of DA3285 by perivascular injection was comparable to that of saline. These results indicate that DA-3285 has no irritating activity when injected through subcutaneous or intravenous route for clinical practice as 3.5% solution.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.234-239
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• 2000

XML을 기반으로 하는 가상문서는 인터넷 상의 정보 공유를 가능하게 하여 새로운 지식을 생성할 수 있도록 한다. 본 논문에서는 가상문서를 지원하는 디지털도서관 시스템에서 XML로 표현된 가상문서를 효과적으로 처리하도록 하는 문서처리기를 설계 구현하였다. 클라이언트의 요청에 따라 문서 처리 시스템은 가상문서를 클라이언트 브라우저에서 볼 수 있는 형태로 변환하여 전달한다. 그러므로 가장 중요한 기능은 내포링크, 참조링크, 총칭링크 등 다양한 의미의 링크들을 포함하는 가상문서를, 변환을 통하여 클라이언트에게 정확하게 전달하는 것이다. 부가적인 기능으로 우리의 디지털도서관 시스템의 다른 구성 요소인 저장 서버, 검색 서버, 링크 서버, 이름 서비스 등을 지원한다.

• Journal of the Korean Society of Safety
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• v.34 no.4
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• pp.68-75
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• 2019

As the tower crane accident emerged as a social issue in 2017, various government measures were prepared. Most of the measures are focused on erecting, climbing, and dismantling phases. Analyzes of 84 serious accidents related to tower cranes from 2000 to 2018 and 104 near misses accidents from 2016 to 2018 revealed that 50% of the serious accidents occurred during the operating phase. The main occupation influencing operating phase accidents was signalman(81.6% of serious accidents), whose communication and competency were governing causes. This result was the same in 294 questionnaires to signalmen. Signal systems and education policies for tower crane signalman in Korea and foreign countries were analyzed, and standardization of wireless signal system and improvement of education system were propose.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2020.06a
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• pp.117-118
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• 2020

The masonry structure is constructed by cement mortar binding material of brick objects and uses reinforced hardware (connected hardware or wall tie) together when building. However, over time, the corrosion of reinforced steel and the deterioration of joint mortar as well as bricks cause the risk of collapse. In particular, when the externally decorated brick wall is installed on the concrete girder for each floor, the angle bracket is not constructed or corroded, the full-layer weight load is applied to the wall of 0.5B, which is an example of full-scale or collapse. The purpose of this study is to provide numerical information on the reinforcement design by experimentally studying the structural performance of concrete reinforcement brackets that reinforce the vertical load of the exterior wall.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.75-76
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• 2023

The construction industry's lack of experience and expertise makes it difficult for projects to realize the full benefits of implementing modular construction. Such project performance-hindering elements are often labeled as modular challenges. The added requirement for the transportation of the finished volumetric module is one aspect of the 'module transportation logistics,' the under-researched modular challenge that can prevent projects from incurring maximum cost and productivity benefits. The typical module transportation phases include lifting, transporting, and offloading. From conducting a literature review, this paper aims to investigate the equipment commonly adopted to lift and offload the module and validate its economic efficiency by comparing it with the alternative lifting/offloading equipment used in the two case projects. The results showed that hydraulic jacks are an economic alternative to the crane for lifting/offloading the module. The increase in single-module projects with smaller budgets made crane usage economically undesirable, and this study suggested a viable option for a more economical alternative.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.77-78
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• 2023

As large logistics buildings have high floor heights and long spans, these buildings are designed as PC structures, and large cranes are used to lift PC members. PC erection planning can generally cause errors depending on the field engineer's experience. To solve this problem, a basic analysis method is needed to establish a systematic PC member erection plan. Crane work can be minimized if the trajectory is easily and quickly calculated according to the location of the crane and applied to the site. Therefore, the objective of this study is a basic study of crane trajectory distance calculation for sustainable PC members erection of large logistic building. In this study, a crawler crane commonly used for lifting PC members is limited. The trajectory distance for the PC erection plan was automatically calculated using the algorithm.