• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1093-1099
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• 2022

The number of buildings is increasing day by day. The next logical footstep is tackling challenges regarding scarcity of resources and sustainability, as well as shifting focus on existing building structures to renovate and retrofit. Many existing old and heritage buildings lack documentation, such as building models, despite their necessity. Technological advances allow us to use virtual reality, augmented reality, and mixed reality on mobile platforms in various aspects of the construction industry. For these purposes, having a BIM model or high detail 3D model is not always necessary, as a simpler model can serve the purpose within many mobile platforms. This paper streamlines a framework for generating a lightweight 3D model for mobile platforms. In doing so, we use an existing structure's site survey data for the foundation data, followed by mobile VR implementation. This research conducted a pilot study on an existing building. The study provides a process of swiftly generating a lightweight 3D model of a building with relative accuracy and cost savings.

• 터널과지하공간
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• 제17권4호
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• pp.255-265
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• 2007

폐광지역의 침하발생 메커니즘 및 영향범위는 현장의 지반조건, 지압분포, 채굴적의 기하학적인 조건, 상부 구조물의 하중 조건 등에 따라 달라지므로 이를 예측하기는 매우 어렵다. 또한 지질 및 지반 상태, 탄층의 발달 상태, 채굴방법 등이 채굴현장마다 다르므로 기존의 보강대책을 그대로 적용하는 데에는 한계가 있다. 본 연구에서는 국내 폐광지역에 대한 합리적인 보강대책 수립을 위해 광역 채굴현황조사를 바탕으로 채굴적의 분포를 파악하고, 대심도 시추조사, 탄성파 토모그래피, 시추공 영상촬영 등의 상세 지반조사를 수행하여 석탄층의 분포현황과 암반이완상태를 파악하였다. 이를 토대로 지반침하이론에 의해 침하발생 유형을 예측하고 지반침하량을 산정하였다. 또한, 연구대상 지역의 침하발생 메커니즘을 분석하였으며, 기존 폐광지역 보강사례를 분석하여 각 침하원인별로 대상지역의 지반특성에 부합되는 지반 및 구조물기초에 대한 보강대책을 수립하였다.

• Journal of Dental Anesthesia and Pain Medicine
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• 제16권4호
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• pp.303-307
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• 2016

Background: In dental intravenous sedation, continuous intravenous infusion of a low-dose drug requires an infusion pump such as a syringe pump. To develop a new syringe pump for clinical use, the functions of the pump must meet certain international standards. Various safety and efficacy tests must be performed on the syringe pump, as stipulated by these standards, and an approval must be received from the approving agency based on such test results. Methods: The authors of the present study developed a novel syringe pump and performed efficacy evaluation by testing its infusion speed at 1 and 25 ml/h, and infusion performance testing at 2 and 24 h. Moreover, performance evaluation was conducted by comparing the novel pump to an existing pump with the infusion speed varied from 1 to 5 ml/h. Results: In the efficacy testing on the newly developed syringe pump, infusion with the infusion speed initially set to 1 ml/h resulted in infusion speeds of 1.00 and 0.99 ml/h in the 2- and 24-h assessment, respectively. Changing the infusion speed setting to 25 ml/h resulted in an infusion speed of 25.09 and 23.92 ml/h in the 2- and 24-h assessment, respectively. These results show no significant differences when compared with other commercially available pumps. Conclusions: The efficacy testing of the newly developed syringe pump showed the accuracy to be within tolerance. Based on these findings, we believe that the newly developed syringe pump is suitable for clinical use.

• Geomechanics and Engineering
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• 제12권1호
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• pp.9-34
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• 2017

In this work, an efficient and simple quasi-3D hyperbolic shear deformation theory is developed for bending and vibration analyses of functionally graded (FG) plates resting on two-parameter elastic foundation. The significant feature of this theory is that, in addition to including the thickness stretching effect, it deals with only 5 unknowns as the first order shear deformation theory (FSDT). The foundation is described by the Pasternak (two-parameter) model. The material properties of the plate are assumed to vary continuously in the thickness direction by a simple power law distribution in terms of the volume fractions of the constituents. Equations of motion for thick FG plates are obtained within the Hamilton's principle. Analytical solutions for the bending and free vibration analysis are obtained for simply supported plates. The numerical results are given in detail and compared with the existing works such as 3-dimensional solutions and those predicted by other plate theories. It can be concluded that the present theory is not only accurate but also simple in predicting the bending and free vibration responses of functionally graded plates resting on elastic foundation.

• 한국지반공학회지:지반
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• 제12권4호
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• pp.33-46
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• 1996

지지력이 부족한 지반에 구조물을 축조할 경우 기초지반의 변형으로 인하여 구조물에 침하나 균열이 발생하게 된다. 이러한 기초지반을 보강하기 위하여 최근에는 고압분사주입공법으로 지중에 지반개량체를 조성하여 기초보강말뚝으로 사용하고 있다. 본 논문은 2중관 고압분사주입공법에 의해 기초지반에 시공된 지반개량체에 대하여 실내시험 및 현장말뚝재하시험을 실시하여 지반보강효과 및 지지력을 검토하였다. 시험결과 지반개량체는 원지반의 특성에 따라 약간의 차이는 있으나 충분한 지반보강효과를 얻을 수 있는 것으로 나타났으며 현장타설말뚝으로서 충분한 지지력을 유지하고 있어 구조물의 침하를 억제하는데 효과가 있는 것으로 나타났다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권12호
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• pp.6333-6336
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• 2012

The burden of cancer is growing globally and is one of the top leading causes of death. Information on cancer patterns are essential for effective planning of cancer control interventions. There is limited published information available on pattern of cancer for the state of Odisha, India. The present study was an attempt to explore the pattern and trend of cancer in Odisha. To fulfill the objectives retrospective data available from 2001-2011 at Acharya Harihar Regional Cancer Center (AHRCC), Cuttack, Odisha, were analyzed. Medical records of cancer patients were reviewed and relevant information on diagnosis, primary site and demographic data were retrieved. Data were entered and analyzed using SPSS 16.0 (SPSS Inc.). A total of 74,861 cancer inpatients were registered at AHRCC for the years 2001-2011. The proportion of females outnumbered males with female:male ratio 1.1:1. The number of female cases increased four folds and that of males three fold over the period studied. Malignancies such as oral cancer (16.93%), acute lymphocytic leukemia/non Hodgkins lymphoma (14.09%) and cancer of gastrointestinal tract (21.07%) are leading cancers among males and carcinomas of breast (28.94%), cervix (23.66%) and ovary (16.11%) were leading among females. Findings from this study indicate an overall increase in cancer reporting which could be regarded as proxy measure for overall cancer situation in Odisha. There is scope and need for integrating other government hospitals, existing private health service providers and research institutions across the state for better planning of cancer control program.

• 디지털융복합연구
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• 제18권2호
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• pp.83-93
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• 2020

최근 바이오헬스산업의 중요성이 증가함에 따라 정부지원의 혁신성이 요구되고 있으나 지원틀의 한계가 있어 사업화를 위한 지원이 미비하여 보완적 지원체계가 시급한 실정이다. 이에 따라 본 연구는 국내의 기존 지원 및 평가가 따르는 TRL 개념을 고찰하고 이를 중심으로 현재 국내 적용 지원체계 실태와 해외의 지원사례 등을 검토하여, 정부가 펼치고 있는 현 TRL 기반의 지원정책이 오랜 기간과 투자가 많이 소요되는 바이오헬스 분야 사업화를 위해서는 한계를 가지고 있음을 지적하였다. 이를 바탕으로 후기 연구개발단계 문제점 해소를 위한 개선점과 바이오산업의 특성을 반영한 사업화 중심의 새로운 지원체계 개념을 상정하고 연구개발사업에 맞게 제시될 수 있는 정책방향과 연결지었다. 본 연구는 바이오헬스분야 사업화를 위해 연구와 산업의 거리를 좁히는 가이드라인 역할이 될 것임에 의의가 있다 할 것이다.

• Steel and Composite Structures
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• 제41권6호
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• pp.873-886
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• 2021

In this paper, an analytical solution for thermodynamic response of functionally graded (FG) sandwich plates resting on variable elastic foundation is performed by using a quasi 3D shear deformation plate theory. The displacement field used in the present study contains undetermined integral terms and involves only four unknown functions with including stretching effect. The FG sandwich plate is considered to be subject to a time harmonic sinusoidal temperature field across its thickness with any combined boundary conditions. Equations of motion are derived from Hamilton's principle. The numerical results are compared with the existing results of quasi-3D shear deformation theories and an excellent agreement is observed. Several numerical examples for fundamental frequency, deflection, stress and variable elastic foundation parameter's analysis of FG sandwich plates are presented and discussed considering different material gradients, layer thickness ratios, thickness-to-length ratios and boundary conditions. The results of the present study reveal that the nature of the elastic foundation, the boundary conditions and the thermodynamic loading affect the response of the FG plate especially in the case of a thick plate.

• 한국건설순환자원학회논문집
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• 제10권4호
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• pp.420-427
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• 2022

본 연구는 국내 생산 발포유리 골재를 활용하여 단열바닥기초로 활용하기 위해, 발포유리 골재로 구성된 단열부의 물리역학적 특성 및 열적특성을 평가하였다. 평가 결과, 압축강도는 기존 유기단열재인 XPS, EPS 등에 비해 높은 40.6 N/cm²로 나타났으며, 열전도율은 0.84 W/mK로 나타났다. 또한 단열바닥구조를 모사한 시험체의 열관류율은 0.37 W/m²K로 나타나 실제 발현되는 발포유리 골재의 열전도율은 0.80 W/mK으로 평가되었다. 본 연구를 통해 발포유리 골재를 사용한 단열바닥구조의 활용가능성을 확인할 수 있었다.

• Geomechanics and Engineering
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• 제34권1호
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• pp.17-27
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• 2023

Taking a subway shield tunnel in a certain section of Zhengzhou Metro Line 5 as an example, the field tests of shield cutting cement-soil monopile composite foundation were carried out. The load and internal force of the tunnel lining under the action of composite foundation were tested on-site and the distribution characteristics and variation laws of earth pressure around the tunnel under the load holding state of the composite foundation were analyzed. Five different load combinations (i.e., overburden load theory + q₀, Terzaghi's theory + q₀, Bierbaumer's theory + q₀, Xie's theory + q₀, and the proposed method (the combination of compound weight method and Terzaghi's theory) + q₀) were used to calculate the internal force of the tunnel structure and the obtained results were compared with the measured internal force results. The action mode of earth pressure on the tunnel lining structure was evaluated. Research results show that the earth pressure obtained by the calculation method proposed in this paper was more consistent with the measured value and the deviation between the two was within 5%. The distribution of the calculated internal force of the tunnel structure was more in line with the distribution law of field test data and the deviation between the calculated and measured values was small. This effectively verified the rationality and applicability of the proposed calculation method. Research results provided references for the design and evaluation of shield tunnels under the action of composite foundations.