석탄회분의 융착형성 연구

이시훈,박주식,임영준,김형택 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.1

본 연구에서는 DTF를 이용하여 준역청탄인 Alaska탄의 회분과 deposit을 제조하고 조성을 분석하여 각각의 조성이 용융성에 미치는 영향을 고찰하였으며 ASTM 회분의 결과와 비교하였다. ASTM 회분은 alumina, silica, mullite, Ca-com-pound 등이 결정성으로 존재하는 반면 DTF 회분은 표면에 K, Fe, Ca 등이 농축된 구형의 drop이 만들어지는 것을 알 수 있었다. 또한 DTF 회분에는 mullite만이 결정성으로 존재하였다. Deposit은 용융후 고형화된 glass phase로 만들어 졌는데 Fe는 Fe^(3+) silicate로 전이되고 deposit하부에 Si가 농축되는 것으로부터 석탄 내의 무기물 조성 중에 용융을 지배하는 것은 Si인 것을 알 수 있었다. Alaska탄은 ASTM 회분분석결과로부터는 용융성이 강하게 예측되었으나 DTF에서 형성된 deposit 분석결과 표면에 부착강도를 낮게 하는 Ca가 농축되어 열전달면에서의 제거는 용이한 것으로 판단되었다. Ash and deposits were made using Alaska sub-bituminous coal in a drop tube furnace(DTF) and the effects of their compositions on fusion were compared with those of the ashes prepared from the ASTM aching procedure. It has been found that the ASTM ash includes alumina, silica, mullite, and Ca compounds as crystalline phases, whereas the DTF ash includes spherical drops with K, Fe, and Ca condensed on the surface. In a DTF ash, only mullite existed as crystalline phase. 'Che deposits existed as glass phases which were formed by solidification from melts, and Fe was transformed to Fe^(3+) silicate and Si was concentrated on the lower part of the deposit. This fact indicates that, among various inorganic elements in coal, Si controls the fusion. Although it was initially predicted that Alaska coal ash have strong slagging propensity based on the results of ASTM ash characterization, the results of analysis of the DTF deposits shows that the deposits can be easily removed from the heat transfer area because it is enriched with Ca which reduces the strength of its adhesion to the solid surface.

당뇨병환자의 후각에 대한 영향인자의 분석

박시영,구한얼,구수권,이상화,손성표,장형준,노환중 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.7

스트레인게이지 센서용 데이터획득시스템의 개발

조시형,박찬원 江原大學校 産業技術硏究所 2010 産業技術硏究 Vol.30 No.A

This research suggested a development of a Data Acquisition System for strain gauge sensor which enables the usage of portable device in the various engineering field that includes, a strain indicator which is frequently used in civil and mechanical engineering, and a GUI function of data acquisition device. The developed system can record 16 channels of strain gauges at a time and its resolution is over 16 bits which can be used effectively in the actual field.

Glycol Oleates의 합성과 절삭유제로서의 물성

최형기,이호식,이치우,강신춘,노시태 한양대학교 공학기술연구소 1993 공학기술논문집 Vol.2 No.1

Glycololeates for the application of cutting fluid were synthesized from oleic acid and glycols such as ethylene glycol, diethylene glycol and triethylene glycol. The ratio of glycol-monooleate and dioleate in product according to the reaction condition was analyzed by TLC, CC and HPLC. Properties of glycololeates as cutting fluid were examined by various testing methods such as profile test, pH test, anti-foaming test friction coefficient test and emulsion stability test to compare those of base oil and cutting fluid trading in the market. Non-catalytic reaction of glycololeates synthesis was showed too low conversion rate, but too fast conversion rate and deep color deterioration of products was obtained with acid-catalyses reaction. Using the SnCl2 catalyst, conversion rate was medium range and products which suitable for the application of cutting fluid with mild colored and with desirable mono- and di-oleate composition was obtained. Cutting fluidal properties of glycololeates with SnCl2 catalyst were better than those of base oil, and were similar level to those of cutting fluid containing various additives.

중앙관제시스템에 의한 LED 도로조명제어

조시형,박찬원 江原大學校 産業技術硏究所 2010 産業技術硏究 Vol.30 No.B

This paper presents the development of LED street light lamp which is controled by central command system. This system includes a lamp unit controller, data repeater and command repeater as well as the LED lamps. These devices enable the individual power control and partial on/off control of the LED lamps by the control repeater through full duplex communication line. Also, they have the ability to control the brightness and period of on/off timing by detecting the car's existence. As a result of this development, it is founded that the performances of the system have been satisfied to apply for the actual road test.

지능형 미소비균일체 계수기의 성능개선

조시형,박찬원 江原大學校 産業技術硏究所 2009 産業技術硏究 Vol.29 No.B

This paper presents the development of smart counting system that is proper for grains with uneven unit weight or shape. This device can detect the small differences of a light beam and count the pulse from wave shape control, when the grain is going on the light screen, which is made by the light beam screen sensor. It can, different from the former conventional device, distinct the uneven grains for counting detect, by using the dedicated hardware and the software algorithm of the light sensor.

광막센싱방법을 이용한 미소물체의 계수검출 : 하드웨어 개선과 소프트웨어

조시형,박찬원 강원대학교 정보통신연구소 2008 정보통신논문지 Vol.12 No.-

In this paper, hardware improvement and software of tile light screen sensing system is introduced and tested to detect small grains such as seeds or electronic chips of uneven sired. Two modules composed of a transmitter-receiver sensor array and a microprocessor-based sensor signal processing system are developed to realize the proposed system. As a result, the sensing signal waveform was relatively improved than the previous machine's and its counting error was within the range of 0.01% in case of normal seeds counting.

광막센싱방법을 이용한 미소물체의 계수검출 (하드웨어)

조시형,박찬원 江原大學校 産業技術硏究所 2007 産業技術硏究 Vol.27 No.B

In this paper, the light screen sensing system is introduced and testified to detect small grains such as seeds or electronic chips of uneven sized. Two modules composed of transmitter-receiver sensor array and microprocessor-based sensor signal processing system are developed to realize the proposed system. Experimental results showed that the sensing signal was relatively clear and its counting performance was very stable.

瀉白散의 肥滿細胞 嫫介性 炎症性 細胞活性物質 分泌 抑制 效果

이병주,신조영,이시형,홍재의,박병민,이승언 한국전통의학연구소 2003 한국전통의학지 Vol.13 No.1

Ocjective : Sabaeksan has been used for the purpose of prevention and treatment of bronchial asthma and allergic asthma in korea. Methods : To investigate the biological effect of Sabaeksan, the author examined cytotoxicity and inflammatory cytokines secretion with human leukemic mast cell line, HMC-1. HMC-1 was stimulated with phorbol 12-myristate 13-acetate (PMA) and calcium ionophore A23187. Sabaeksan by itself had no effect on viability of HMC-1. Result : The effects of Sabaeksan on the secretion of tumor necrosis factor-alpha (TNF-α) and interleukin (IL)-6 from HMC-1 were evaluated with enzyme-linked immunosorbent assay. Sabaeksan (1 mg/㎖) inhibited PMA plus A23187-stimulated TNF-α and IL-6 secretion, by 43.86 ± 5.26%, 56.39 ± 3.65%, respectively. Sabaeksan also inhibited the NF-κB (p50/p65) expression. Conclusion : Taken together, these results suggest that Sabaeksan inhibit the production of inflammatory cytokines in HMC-1 cells through blockade of NF-κB activation.

ToolBook 3.0을 이용한 인터넷 연결 API의 설계 및 구현에 대한 연구

안종근,안효범,유시형 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.1

ToolAPI is a research tied to Multimedia ToolBook 3.0 for MS Windows. You need anInternet and WWW connection to take full advantage of this software. TooIAPl represents therefore an easier method to download and run hypermedia software using Netscape browser. TooIAPl is freeware and is available at the URL. TooIAPl consist of a Multimedia ToolBook 3.0 function library and a series of configuration settings to be applied to your favourite Web browser. ToolAPI compliant applications can be launched with a single mouse click directly from the World Wide Web and keep basic control on the browser window. ToolAPI support Netscape(all versions). To implement them in your own applications, you can copy this script as it is directly in your book, and call these functions using the syntax: to get functionName ([parameter1, parameter2, ])