• 제목/요약/키워드: CST

검색결과 970건 처리시간 0.028초

소화슬러지의 비저항계수(SRF)와 모세관흡입시간(CST)의 상호관계식 유도 및 비교 (Coupling Equation of Specific Resistance to Filtration(SRF) and Capillary Suction Time(CST) of Digested Sewage Sludge)

  • 김지형;나승민;박지호;김영욱
    • 한국산학기술학회논문지
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    • 제8권4호
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    • pp.874-880
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    • 2007
  • CST와 SRF는 슬러지 탈수효율 인자로 가장 널리 사용되고 있다. 이러한 CST와 SRF는 각각의 분석특징의 장.단점으로 인해 실험방법 및 결과 해석시, 슬러지 탈수의 최적조건을 찾아 예측하는데 어려움이 있다. 따라서 본 연구는 탈수성 지표로 이용되는 CST와 SRF의 이론식 가운데 CST와 SRF의 상호관계식을 유도하여 각각의 실측값과 예측값을 비교한 후 비교적 측정이 간편한 CST 시험만으로도 탈수최적조건을 도출할 수 있는 이론식을 검토하였다.

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Interaction analysis of Continuous Slab Track (CST) on long-span continuous high-speed rail bridges

  • Dai, Gonglian;Ge, Hao;Liu, Wenshuo;Chen, Y. Frank
    • Structural Engineering and Mechanics
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    • 제63권6호
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    • pp.713-723
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    • 2017
  • As a new type of ballastless track, longitudinal continuous slab track (CST) has been widely used in China. It can partly isolate the interaction between the ballastless track and the bridge and thus the rail expansion device would be unnecessary. Compared with the traditional track, CST is composed of multi layers of continuous structures and various connecting components. In order to investigate the performance of CST on a long-span bridge, the spatial finite element model considering each layer of the CST structure, connecting components, bridge, and subgrade is established and verified according to the theory of beam-rail interaction. The nonlinear resistance of materials between multilayer track structures is measured by experiments, while the temperature gradients of the bridge and CST are based on the long-term measured data. This study compares the force distribution rules of ballasted track and CST as respectively applied to a long span bridge. The effects of different damage conditions on CST structures are also discussed. The results show that the additional rail stress is small and the CST structure has a high safety factor under the measured temperature load. The rail expansion device can be cancelled when CST is adopted on the long span bridge. Beam end rotation caused by temperature gradient and vertical load will have a significant effect on the rail stress of CST. The additional flexure stress should be considered with the additional expansion stress simultaneously when the rail stress of CST requires to be checked. Both the maximum sliding friction coefficient of sliding layer and cracking condition of concrete plate should be considered to decide the arrangement of connecting components and the ultimate expansion span of the bridge when adopting CST.

Laplacian-Regularized Mean Apparent Propagator-MRI in Evaluating Corticospinal Tract Injury in Patients with Brain Glioma

  • Rifeng Jiang;Shaofan Jiang;Shiwei Song;Xiaoqiang Wei;Kaiji Deng;Zhongshuai Zhang;Yunjing Xue
    • Korean Journal of Radiology
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    • 제22권5호
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    • pp.759-769
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    • 2021
  • Objective: To evaluate the application of laplacian-regularized mean apparent propagator (MAPL)-MRI to brain glioma-induced corticospinal tract (CST) injury. Materials and Methods: This study included 20 patients with glioma adjacent to the CST pathway who had undergone structural and diffusion MRI. The entire CSTs of the affected and healthy sides were reconstructed, and the peritumoral CSTs were manually segmented. The morphological characteristics of the CST (track number, average length, volume, displacement of the affected CST) were examined and the diffusion parameter values, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), radial diffusivity (RD), mean squared displacement (MSD), q-space inverse variance (QIV), return-to-origin probability (RTOP), return-to-axis probabilities (RTAP), and return-to-plane probabilities (RTPP) along the entire and peritumoral CSTs, were calculated. The entire and peritumoral CST characteristics of the affected and healthy sides as well as those relative CST characteristics of the patients with motor weakness and normal motor function were compared. Results: The track number, volume, MD, RD, MSD, QIV, RTAP, RTOP, and RTPP of the entire and peritumoral CSTs changed significantly for the affected side, whereas the AD and FA changed significantly only in the peritumoral CST (p < 0.05). In patients with motor weakness, the relative MSD of the entire CST, QIV of the entire and peritumoral CSTs, and the AD, MD, RD of the peritumoral CST were significantly higher, whereas the RTPP of the entire and peritumoral CSTs and the RTOP of the peritumoral CST were significantly lower than those in patients with normal motor function (p < 0.05 for all). In contrast, no significant changes were found in the CST morphological characteristics, FA, or RTAP (p > 0.05 for all). Conclusion: MAPL-MRI is an effective approach for evaluating microstructural changes after CST injury. Its sensitivity may improve when using the peritumoral CST features.

Visual Presentation of Connected Speech Test (CST)

  • Jeong, Ok-Ran;Lee, Sang-Heun;Cho, Tae-Hwan
    • 음성과학
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    • 제3권
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    • pp.26-37
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    • 1998
  • The Connected Speech Test (CST) was developed to test hearing aid performance using realistic stimuli (Connected speech) presented in a background of noise with a visible speaker. The CST has not been investigated as a measure of speech reading ability using the visual portion of the CST only. Thirty subjects were administered the 48 test lists of the CST using visual presentation mode only. Statistically significant differences were found between the 48 test lists and between the 12 passages of the CST (48 passages divided into 12 groups of 4 lists which were averaged.). No significant differences were found between male and female subjects; however, in all but one case, females scored better than males. No significant differences were found between students in communication disorders and students in other departments. Intra- and inter-subject variability across test lists and passages was high. Suggestions for further research include changing the scoring of the CST to be more contextually based and changing the speaker for the CST.

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뉴로피드백과 두개천골요법 및 병용요법에 참여한 중년여성의 경험에 대한 내용분석 (Content analysis on experiences in middle aged women participating in Neurofeedback, Cranio-Sacral Therapy and Combine Therapy)

  • 이정은;현경선
    • 한국산학기술학회논문지
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    • 제13권3호
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    • pp.1042-1053
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    • 2012
  • 본 연구의 목적은 중년여성이 뉴로피드백(NF) 또는 두개천골요법(CST) 및 병용요법(CT:NF+CST)을 받고난 후 경험한 효과를 확인하고자 하는 것이다. 연구참여자는 S시 M동에 거주하는 중년여성으로서 NF군 17명, CST군 17명, CT군 19명, 총 53명이었다. 2007년 10월 8일부터 12월 14일까지 10주 동안 NF 30회, CST 10회, CT는 NF 30회의 훈련과 CST 10회가 시술되었고, 자료는 각각의 요법을 시술받는 동안 경험한 반응을 매일 일지에 자필로 작성하도록 하여 수집되었다. 자료분석은 연구참여자들이 기술한 자료를 토대로 의미 있는 내용을 찾아내어 내용분석 자료를 표출한 후, 각각의 자료를 속성의 유사점과 차이점을 확인하여 분류되었고, 분류된 속성들은 유사한 의미를 갖는 속성끼리 묶어 상위속성으로 범주화하여 명명하였다. 원 자료에서 효과를 진술한 내용 중 의미 있는 것을 뽑은 결과 NF 37개, CST 91개, CT 110개의 내용분석 자료가 표출되었고, 각각의 내용분석 자료를 유사한 것끼리 묶은 결과 NF 22개, CST 63개, CT 68개의 속성으로 분류되었다. 이 속성들은 9개의 상위속성 즉 불편감, 이완감, 신체증상 완화, 정신기능 향상, 신체적 이완, 심리적 이완, 시술자와의 교감, 카타르시스, 기(氣) 경험으로 범주화되었다. 요법 시 가장 많이 나타난 속성을 보면 NF 시에는 훈련 중 졸림, 마음이 편안해 짐, 몸이 가벼워짐, 마음이 가벼워짐 등 이었고, CST 시에는 마음이 편안해짐, 수면 향상, 건강해 짐, 울음, 몸이 편안해짐 등 이었으며, CT 시에는 마음이 편안해짐, 몸이 가벼워짐, 몸이 편안해짐, 수면 향상, 눈물 등 이었다. 결론적으로 NF 또는 CST 및 CT는 중년여성에게 신체적, 심리적 이완효과가 있으므로 중년여성의 심신이완을 위한 보완대체요법으로 활용할 수 있다.

냉부하검사(CST)로 살펴 본 원적외선 기능성 제품이 족부냉증에 미치는 영향 : A pilot study (Effect of far-infrared radiating products on cold hypersensitivity of lower limbs using Cold Stress Test (CST) : A pilot study)

  • 이윤재;이경섭
    • 대한한방체열의학회지
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    • 제6권1호
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    • pp.69-75
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    • 2008
  • Purpose: We investigated the effect of far-infrared radiating products on cold hypersensitivity of lower limbs using CST. Methods: 7 patients with cold hypersensitivity of lower limbs were investigated in this study. Exclusive criteria was skin diseases, spinal nervous disease and external wounds. They were asked to answer the VAS of cold hypersensitivity at baseline and after 3 weeks. We measured temperature of lower limbs with Spectrum 9000 MB (Dorex Inc, USA). We performed cold stress test (CST) by 3 thermographic observation using DITI : 1st was taken after 15 minutes resting at $25^{\circ}C$, the 2nd was immediately taken after 1 minute soak in $20^{\circ}C$ water, the 3rd was taken at 15 minutes after soak. We performed 3 times of CST : 1st CST was perfomed at baseline, 2nd CST was perfomred after 1 week and just observation, 3rd CST was performed after 1 week using far-infrared radiating products (lasner, UMT, Korea). Results: After using products, temperature of foot incresed more than thigh area, but there was no significance. There was no statistical difference of VAS, change of temperature and CST between before and after using far-infrared radiating products. Conclusion: There was no statistical effect of far-infrared radiating products on change of temperature of lower limbs.

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바이러스 유래 시스타틴 재조합 단백질의 곤충 면역 및 발육 억제효과 (Inhibitory Effects of a Recombinant Viral Cystatin Protein on Insect Immune and Development)

  • 김영태;엄성현;박지영;김용균
    • 한국응용곤충학회지
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    • 제53권4호
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    • pp.331-338
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    • 2014
  • 시스타틴(cystatin: CST)은 C1A류 시스테인 단백질분해효소에 대한 경쟁적 가역억제자로서 동식물류에서 파파인과 같은 캐셉신을 억제대상으로 작용하게 된다. 바이러스 유래 CST (CpBV-CST1)이 폴리드나바이러스의 일종인 CpBV (Cotesia plutellae bracovirus)에서 동정되었다. 기존 연구는 이 유전자의 과발현이 배추좀나방(Plutella xylostella) 유충의 면역 및 발육을 교란한다는 것을 보여 주었다. 본 연구는 이 유전자의 단백질 기능을 분석하기 위해 세균발현시스템을 이용하여 재조합단백질(rCpBV-CST1)을 형성하여 단백질분해효소에 대한 활성억제효과를 결정하고, 곤충의 면역과 발육에 대한 생리적 억제효과를 분석했다. 이 유전자 번역부위는 138 개 아미노산으로 약 15 kDa 크기의 단백질로 추정되었다. CpBV-CST1이 먼저 pGEX 발현벡터에 재조합되고, BL21 STAR (DE3) competent cells에 형질전환된 후 0.5 mM IPTG로 4 시간동안 과발현되었다. 분리된 재조합단백질은 파파인에 대한 뚜렷한 억제효과를 나타냈다. 이 재조합단백질은 파밤나방(Spodoptera exigua)에 대해서 혈구소낭형성의 세포성 면역반응을 억제하고, 경구로 처리할 때 배추좀나방의 유충발육을 처리 농도에 비례하여 제한시켰다. 이상의 결과는 CpBV-CST1이 해충 밀도 억제에 응용될 수 있음을 제시하고 있다.

CST-트리를 채택한 Mint 시스템을 이용한 멀티미디어 콘텐츠 검색 개선 (CST-Tree with improved Mint system multimedia content using the refine)

  • 정명진;조성제
    • 디지털산업정보학회논문지
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    • 제9권3호
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    • pp.145-153
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    • 2013
  • Multimedia contents' searching methods in existing mobile computer environment tend to be brought with many over heads when attempting to search data in large bulks. The MINT system has been studied to resolve such problem. However, MINT system delivers many over heads by searching multimedia contents through applying B-Tree. The suggested method is said to be CST-MCR searching system based on CST-Tree. The specific characteristic of this method is improved MINT system by applying CST-Tree's index. The result of capacity evaluation came out with improved capacity of 4.27% from MINT system and CST-MCR methods in average. Conclusively, it has been proven that the suggested method is superior.

두개천골요법이 장기요양시설노인의 뇌기능지수에 미치는 효과 (The Effects of Cranio-Sacral Therapy on Brain Function Quotient of Elderly with Long-term Care Insurance Service)

  • 이정은
    • 한국산학기술학회논문지
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    • 제17권1호
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    • pp.474-484
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    • 2016
  • 최근 CST 효과에 대한 많은 과학적 근거들이 활발히 제시되고 있으며, CST를 실제 임상에서 적극적으로 활용하고 있다. 이에 본 연구는 CST가 장기요양시설노인의 뇌기능 향상에 효과가 있는지를 확인하기 위한 비동등성 대조군 전후 설계의 유사 실험연구이다. 2015년 1월 3일~2015년 2월 28일까지 장기요양시설노인 12명(실험군 6명, 대조군 6명)을 대상으로 Upledger가 개발한 10단계(10-Step Protocol) CST를 1회 50분, 주 1회, 8주간, 총 8회 적용하였다. 뇌기능 측정은 2 Channel neuro-feedback system 이동식 뇌파 측정기를 이용하여, CST 시술 시작 전과 마지막 시술 후에 뇌파를 측정하였으며, 한국정신과학연구소에서 개발한 뇌기능 분석 프로그램인 BQ test로 뇌기능지수를 분석하였다. 집단 간 자료의 분석은 SPSS Windows(Version 18.0)프로그램의 Mann-Whitney U-test를 사용하였다. 연구결과 뇌기능지수 중 주의지수(좌)(우), 주의지수의 하위지수인 긴장도(좌)(우), 항스트레스지수(좌)(우), 정서지수, 브레인지수에서 유의한 변화가 나타났고, 주의지수의 하위 지수인 주의비율에서만 유의하지 않았다. 이상의 결과로 CST가 시설노인의 뇌기능지수를 증가시켜 뇌기능을 향상시켰음을 확인할 수 있었으며, CST를 노인요양시설에서 건강과 뇌기능 향상을 위한 효과적인 중재방법으로 활용할 것을 제안한다.

청기소독탕(淸肌消毒湯)이 아토피피부염 염증 관련 인자에 미치는 영향 (Effect of CST on atopic dermatitis related inflammatory cytokines)

  • 김혜림;김선빈;윤미영;이기무;김동희
    • 혜화의학회지
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    • 제20권2호
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    • pp.41-52
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    • 2012
  • In vitro tests were performed using CST to investigate its role on oxidative damages and inflammatory cytokines. 90% or higher cell viability was observed in CST treated groups from 25 to 200 ${\mu}g/m{\ell}$ using Raw 264.7 cells. CST showed dose-dependent DPPH scavenging activity, with 91.3% and 92.2% scavenging activities at 400 and 800 ${\mu}g/m{\ell}$ concentrations, respectively. CST showed dose-dependent suppression activity of ROS production, especially at 200 ${\mu}g/m{\ell}$ of 41.3%. CST decreased NO production activity, with significant decrease of 16.2% and 33.5% at 100 and 200 ${\mu}g/m{\ell}$ concentrations, respectively. IL-$1{\beta}$, IL-6, MCP-1 production rate were significantly decreased by 30.0%, 27.2%, 22.1% when Raw 264.7 cells were treated with LPS and with CST of 200 ${\mu}g/m{\ell}$. Also, TNF-${\alpha}$ production rate was decreased by 28.6%. The results above indicated therapeutic effect of CST on the AD through anti-oxidative and immune modulatory effect. Various blending of drug substances with CST should be clinically tested.