• The Korean Journal of Pain
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• 제7권2호
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• pp.217-221
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• 1994

Percutaneous neurolysis of upper thoracic sympathetic ganglion was performed in 40 patients by simultaneously injecting 3 ml of pure alcohol into the T2 and T3 levels after 3 ml of injection of local anesthetic agent on the same sites. Using a skin temperature probe, finger tip temperatures were measured on the index finger ipsilateral to the nerve block before block, 15 and 30 minutes after test block, and 30 minutes after alcohol block. Alcohol block was performed immediately after 30 minutes test block. Finger tip temperatures obtained at 30 minutes post alcohol block and test block and the differences in the temperatures measured before and 30 minutes after alcohol block were shown to be statistically important as potential indicators for prediciting long term outcome of therapy for palmar hyperhidrosis using this technique. These results demonstrate that the palmar temperature monitoring method is sufficiently sensitive to predict the outcome of nerve block during and after thoracic sympathetic ganglion block.

• 대한교통학회지
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• 제32권2호
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• pp.162-169
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• 2014

세계화의 진전으로 국가들 간 사람과 물자의 교류는 지속적으로 증가해왔고 이에 따라 공항네트워크 또한 점점 방대해지고 촘촘해지고 있다. 자연계의 다양한 네트워크를 연구하는 네트워크 과학은 공항네트워크를 분석하는 데에 유용하다. 본 연구는 사회과학 네트워크에서 사용되고 있는 구조적 등위성 개념을 아시아 태평양 공항네트워크에 적용하여 그 결과를 바탕으로 국가들 간의 항공 시장, 교류 관계 정도를 해석해보았다. 아시아 태평양 공항네트워크는 8개의 블록(block)으로 구분되었으며 각 Block의 특성과 Block들 간의 관계를 분석한 결과 Block 1(주요 허브 공항들의 집합)과 Block 5(호주와 뉴질랜드의 공항)는 다른 Block들보다 깊은 관계를 갖고 있는 Block의 수가 많았다(영향력이 컸다). 다른 곳과 관계가 낮은 곳으로는 Block 3(CIS 지역), Block 7(말레이시아 인도네시아), Block 8(남태평양 프렌치폴리네시아)이었다. 구조적 등위성 분석으로 방대하고 복잡한 네트워크를 소수의 Block으로 집단화시켜 분석할 수 있으며, 네트워크의 성격에 맞게 항공 시장의 관계, 교류와 교역의 정도를 해석하여 의미 있는 결과를 얻었다.

• 한국정보통신학회논문지
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• 제15권2호
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• pp.455-461
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• 2011

블록정합 기법을 이용한 객체추적에서 크기가 다양하고 수시로 변하는 객체를 추적하기 위해 고정 정합블록을 사용하는 것은 적합하지 못하다. 본 논문은 동적 환경을 위한 적응적 정합블록을 정의하고, 이를 위한 블록정합 알 고리즘을 제안한다. 정합블록은 $42{\times}42$ 화소의 넓은 영역에 $10{\times}10$ 화소의 주 블록과 $6{\times}6$ 화소의 부 블록 8개로 구성되고, 영역 중심에 위치한 주 블록은 객체 블록으로 사용되고, 영역의 외곽에 위치한 부 블록은 객체블록을 위한 후보 블록으로 사용된다. 제안된 알고리즘은 부 블록에서 이전 10 프레임의 움직임 벡터를 이용해 객체블록을 추출하고, 주 블록과 추출된 객체블록을 이용해 블록정합을 수행한다. 성능 평가를 위한 실험들은 제안된 알고리즘이 정합블록에서 유효한 객체블록만을 적절히 추출하고, 자유로운 움직임을 갖는 객체를 영상의 중심 영역에 유지시켜 주는 것을 보여주고 있다.

• 신재생에너지
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• 제18권4호
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• pp.1-11
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• 2022

Landfill gas (LFG) generation characteristics in a construction waste landfill zone (block E) and mixed landfill zone (block A) were analyzed. During the period from October 2018 to April 2022, a total of 936×10³ and 1,001×10³ tons of waste were disposed in block E and block A, respectively. Out of this, 27.1% and 55.6% were biodegradable waste in block E and block A, respectively. The landfill masses of the two blocks were converted to be comparable. Then, the biodegradable waste and organic carbon were estimated by element analysis, biodegradable carbon by biochemical methane potential experiment (DC), and sulfate ion by acid decomposition. Results showed that biodegradable waste, organic carbon, biodegradable carbon, and sulfate ions in block A were 2.1, 1.6, 5.2, and 0.4 times greater than those in block E, respectively. The amount of LFG generated by block A was 4.8 times greater than that by block E. The average concentrations of methane (CH₄) were 60.8% and 60.9% in block E and block A, respectively, which were unrelated to the nature of disposed waste. The average concentrations of hydrogen sulfide (H₂S) were significantly high in block E (4,489 ppm) and block A (8,478 ppm). As the DC/SO₄^2- of block E and block A were 0.35 and 4.56, respectively, increase in DC/SO₄^2- caused increase in not only the total amount but also the concentration of H₂S generated.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2726-2730
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• 2011

This paper proposes a CBTC wayside signaling system, which redeems existing track-circuit-based ones by using movement authorities mixed with logical block and moving block. Only one train can be entered into the logical block or the route for existing wayside signaling system. Applying moving block for CBTC system enables the train to get nearer to the preceding one, because its protection mechanism uses train's safe boundary, not fixed block unit. By narrowing the existing route set to switch machine and applying the moving block beyond that area, more than one train can enter into one route area. This paper shows that the efficient train control, i.e. shortening the headway, is possible using the moving block mixed with logical block in wayside signaling system.

• 한국안전학회지
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• 제24권5호
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• pp.43-47
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• 2009

Armor block is used to reduce wave energy. To do this, the stability of coastal structure is enhanced. It is very expensive to develop a new type armor block. So, the research of new type armor block is very short. We develope truncated tetrahedron type armor block(new type block) which have a hole in center part. In this study, the stability of new type armor block is investigated by hydraulic model test. In the result, the stability coefficient($K_D$) of new type armor block is 11.8. this value is more superior than value of tetrapod.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 1999년도 추계 학술대회논문집
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• pp.108-114
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• 1999

In this paper. a new automatic multi=block grid generation technique for general 2D regions is introduced. According to this simple and robust method, the domain of interest is first triangulated by using Delaunay triangulation of boundary points, and then geometric information of those triangles is used to obtain block topology. Once block boundaries are obtained. structured grid for each block is generated such that grid lines have $C^0-continuity$ across inter-block boundaries. In the final step of the present method, an elliptic grid generation method is applied to smoothen grid distribution for each block and also to re-locale the inter-block boundaries, and eventually to achieve a globally smooth multi-block structured grid system with $C^1-continuity$.

• 대한조선학회 특별논문집
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• 대한조선학회 2005년도 특별논문집
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• pp.165-170
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• 2005

The weight of a ship depends on the size of the ship. Normal lightweight of a ship is over 10,000 tons. So it is inevitable to divide a ship into about more than hundreds of lumps. Each of lumps is called as a block in shipbuilding. The sizes of blocks are decided by a yard's facilities. Among them lifting cranes are most decisive facilities. By block's size the productivity of a yard is decided very much. So it is very important to have a proper block division during shipbuilding. This paper refers to the recent trend of block division among yards. This paper would give an idea how to decide boundaries of blocks. Block division also decides both quality of a ship and work volume of it. These days the block erection method is changed dramatically due to use sea barge mounted crane for erection of a grand ring block. This paper explains the new trend of block division in shipbuilding.

• Journal of the Optical Society of Korea
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• 제19권5호
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• pp.537-543
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• 2015

Liquid crystal displays (LCDs) have slow responses, so motion blurs are often perceived in fast moving scenes. To reduce this motion blur, we propose a novel method of robust motion compensated frame interpolation (MCFI) based on bidirectional motion estimation (BME) and weight-overlapped block motion compensation (WOBMC) with variable block sizes. In most MCFI methods, a static block size is used, so some block artefacts and motion blurs are observed. However, the proposed method adjusts motion block sizes and search ranges by comparing matching scores, so the precise motion vectors can be estimated in accordance with motions. In the MCFI, overlapping ranges for WOBMC are also determined by adjusted block sizes, so the accurate MCFI can be performed. In the experimental results, the proposed method strongly reduced motion blurs arisen from large motions, and yielded interpolated images with high visual performance and peak signal-to-noise ratio (PSNR).

• The Korean Journal of Pain
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• 제8권2호
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• pp.225-234
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• 1995

Low back pain(LBP) is one of the most common ailment. There were two type of LBP in the clinic. One of them is low back pain with leg pain, the other one is low back pain without leg pain. Author explain the reasons, characters. mechanism, diagnosis, and reported 156 cases of LBP. There are various method to treatment of low back pain in recent. The first selection for treatment of LBP were intervertebral block added "+" type block(IVP "+" TB). according to author's experience, the rate of Excellent and good were account for 96.2%. Other method of LBPO therapy were also used in Pain clinic, such as psoas compartment block, caudal block, epidural steroid block, zygapophysial joint block, nerve root block, subarachnoid neural block, Lumbar sympathetic block, etc. Finally, author introduced Pain clinic in China. divided to three titles: (1) history, (2) CASP and scientific activity, (3) pain therapy in China.