• 한국터널지하공간학회 논문집
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• 제17권6호
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• pp.665-674
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• 2015

TSL(Thin Spray-on Liner)는 폴리머로 구성된 재료로 기존 시멘트계 숏크리트에 비해 높은 조기 강도와 시공성, 방수기능이 특징이다. TSL이 숏크리트에 비해 가장 큰 차이점은 재료의 인장력과 점착력으로 하중을 지지하는 것이다. 최근 TSL의 우수한 특성으로 인해 TSL에 대한 수요가 늘어나고 있으나 아직까지 국내에 TSL의 재료적 특성이나 평가방법이 잘 알려지지 않았다. 본 연구에서는 TSL의 특성 중 접촉면의 거동을 실내시험과 수치해석 방법을 사용하여 분석하였다. 해석결과 TSL과 암석 모델 사이의 접촉면에 점착모델과 손상 기준을 함께 적용하여 TSL의 접촉 거동을 적절히 모사할 수 있었다. 또한 접촉면의 강성이 TSL 접촉면의 초기 하중-변위 관계를 설명하여 손상 에너지가 접촉면의 수렴 수준을 결정하였다.

• Archives of Pharmacal Research
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• 제16권2호
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• pp.129-133
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• 1993

Temperature sensitive liposomes(TSL) containing adriamycin (ADM) and cytarabine (Ara-C) were prepared. ADM and Ara-C were selected as model compounds of amphiphilic and hydrophilic drug, respectively. Encapsulation efficiency of ADM entrapped into TSL was about twice greater than that of Ara-C. It might be due to different polarity of the drug, Lipid compositions of TSL had no effect on the encapsulation efficiency of drugs. Thermal behavior of TSL using a differential scanning calorimetry (DSC) was also investigated. Phase transition of TSL using a differential scanning calorimetry (DSC) was also investigated. Phase transition temperature $(T_c)$ of TSL was dependent on the lipid compositions of TSL ADM broadened thermogram of TSL but Ara-C did not. However, $T_c$ of TSL was not changed by any drug. Release rate of drugs was highly dependent on temperature. The release profile of ADM was similar to that of Ara-C. The maximum release rate of drugs from TSL was occurred at the near $T_c$ and observed at $39-41^\circ{C}$ for DPPC (Dipalmitoylphosphatidylcholine) only, $52-54^\circ{C}$ for DPPC and DSPC (1:1), respectively. Effect of human serum alburmin (HAA) on the release rate of ADM was investigated. HSA had no significant effect on the release of ADM below $T_c$. However, ADM release from TSL was increased at the near and above $T_c$. The HSA-induced leakage of drug may result from the interaction of liposomal constituents with HSA structure at the near TEX>$4^\circ{C}$. From the fact that the release profiles of ADM from freshly prepared TSL and stored TSL for 1 week at TEX>$4^\circ{C}$ was not changed, the TSL was considered to be stable for at least 1 week at TEX>$4^\circ{C}$. Based on these findings, TSL may be useful to deliver drugs to preheated target sites due to its thermal behaviors.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.176-176
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• 2023

The Tonle Sap is the richest and diverseness of freshwater ecosystem in Southeast Asia, receiving nurturing water flows from the Mekong and its immediate basin. In addition, the rapid development in the Tonle Sap Lake (TSL) Basin, and flood inundation may threaten the natural diversities and characteristics. The impacts of flood inundation in 11 sub-basins contributing to the Tonle Sap Lake were assessed using the Rainfall-Runoff-Inundation (RRI) model to quantify the potential magnitude and extent of the flooding. The RRI model is set up by using gauged rainfall data to simulate the information of river discharge and flood inundation of huge possible flood events. Moreover, two satellite precipitation products (SPPs), CHIRPS and GSMaP, within respectively spatial resolutions of 0.05° and 0.1°, are utilized as an input for the RRI model to simulate river discharge, flood depth, and flood extent for the great TSL Basin of Cambodia. This study used statistical indicators such as NSE, PBIAS, RSR, and R2 as crucial indices to evaluate the performance of the RRI model. Therefore, the findings of this study could provide promising guidance in hydrological modeling and the significant implications for flood risk management and disaster preparedness in the region.

• 한국전기전자재료학회논문지
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• 제17권6호
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• pp.668-672
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• 2004

Upon Debye's dielectric relaxation theory, we tried simple determination method of trap level in organic EL materials. From dielectric measurements in the 20 Hz - 1 MHz frequency range and in the 150 K - 320K temperature range, the depth of traps in Alq$_3$ filled with remaining electrons was determinated. Comparing to other determination techniques like TSL, or TL, the apparatus all we need is just simple LCR meter, thermometer and cooling method(liquid nitrogen). The mean activation energy is about 0.20 eV. It is in good agreement with previous determinations by other techniques like TSL. This results consolidate the validity of Burrow's transport mechanism model. Further intensified experiment with UV light on the dielectric absorption(Photodipolair effect) was nevertheless disturbed by the photoconductivity component.

• 한국소음진동공학회논문집
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• 제17권8호
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• pp.757-765
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• 2007

Enhanced PSPICE circuit model for vented-box loudspeaker system with lumped parameters was proposed to more accurately simulate real vented-box loudspeaker system. Frequency dependent parameters were used to model voice coil inductor. Acoustic pressure response curves and electrical impedance curves were simulated and investigated by PSPICE circuit model according to circuit parameters' variations. Finally, it was used to identify faults detection in woofers manufactured by unskilled persons.

• 한국소음진동공학회논문집
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• 제17권10호
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• pp.983-992
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• 2007

It was proposed to identify Thiele Small Parameters for loudspeaker attached to closed-box using known dynamic mass of moving parts. Also, enhanced PSPICE circuit model for closed-box loudspeaker system was proposed to more accurately simulate real closed-box loudspeaker system. Frequency dependent parameters were used to model voice coil inductor. Acoustic pressure response curves and electrical impedance curves were simulated and investigated by PSPICE circuit model according to compensation filter's parameters. Finally, proposed method is expected to be utilized for identification of pseudo Thiele Small parameters of microspeaker.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2004년도 춘계 학술대회논문집
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• pp.172-177
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• 2004

In the present work, we have interests on the modification of parallel implemented with MPI(Message Passing Interface) programming method, 3-Dimensional, unsteady, incompressible Navier-Stokes equation solver to analyze the low-Reynolds number flow In order to accurate calculation aerodynamic coefficients in low-Reynolds number flow field, we modified the two-equation turbulence model. This paper describes the development and validation of a new two-equation model for the prediction of flow transition. It is based on Mentor's low Reynolds $\kappa-\omega$ model with modifications to include Total Stresses Limitation (TSL) and Separation Transition Trigger (STT)

• 대한화학회지
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• 제58권6호
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• pp.575-579
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• 2014

종양 조직으로 약물을 효과적으로 전달하기 위하여 리포솜의 개발이 활발이 연구되고 있다. 그러나 리포솜이 종양조직에 효과적으로 축적됨에도 불구하고, 낮은 약물 방출 때문에 리포솜의 치료 효과가 제한적이다. 따라서 우리는 외부 자극에 의하여 약물방출을 최대화 시킬 수 있는 온도민감성 리포솜을 개발하였다. 모델약물인 독소루비신은 pH 전위차 방법에 의하여 리포솜 내부에 봉입하였다. 리포솜의 입자 크기는 $142.0{\pm}6.24nm$ 이었고, 표면전하는 $-10.55{\pm}1.12mV$ 이었다. 온도민감성 리포솜으로부터 약물의 방출은 형광광도계로 측정하였으며 $42^{\circ}C$ 이상에서 5분 이내에 80% 이상의 방출률을 나타냈다. 초음파에 의해 온도민감성 리포솜으로부터 방출된 독소루비신의 세포독성은 초음파를 조사하지 않은 온도민감성 리포솜보다 월등히 우세하였다. 이번 연구에서 우리는 초음파에 의하여 온도민감성 리포솜으로부터 온도에 민감한 약물방출을 증명하였고, 이것은 외부 자극에 의한 종양조직의 약물 농도를 증가시킬 수 있는 암치료에 효과적일 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.103-104
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• 2015

본 논문에서는 모형 차량을 이용하여 자율주행 시스템을 구현하고자 한다. 이 시스템의 목적은 차선을 계속 유지함으로써 자율주행을 하는데 있다. 이를 위하여 32비트 마이크로프로세서를 이용한 모형차량을 설계하고 흰 바탕과 검은색 차선으로 이루어진 환경에서 시뮬레이션을 통해 살펴본다. 라인스캔 카메라(TSL1401CL)를 사용하여 차선을 인식하고 이에 따라 자율주행을 하는 시스템을 구현한다.

• 전자공학회논문지 IE
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• 제45권4호
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• pp.60-67
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• 2008

피부색은 자동화된 얼굴 인식을 위한 매우 중요한 정보 중의 하나이다. 본 논문에서는 컬러 정보와 피부색 모델을 이용한 피부 영역 검출 기법을 제안하였다. 제안된 방법은 적응적 조명 보정 기법을 통해 피부색 영역의 검출 성능을 개선하였고 전처리 필터를 적용하여 피부색이 아닌 영역을 먼저 제거시킴으로써 처리 속도를 향상시켰다. 또한 피부색 검출 성능이 우수한 ST 컬러 공간을 수정하여, 보다 정확한 피부색 영역을 추출할 수 있도록 하였다. 제안된 방법의 실험 결과 기존의 방법과 비교하여 보다 우수한 검출 결과를 나타냈으며, 처리 속도 또한 약 $33{\sim}48%$ 향상시킬 수 있었다.