• Korean Journal of Veterinary Research
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• v.38 no.3
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• pp.595-599
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• 1998

The present study was undertaken to develop the kit for indirect immunofluorescence antibody test(IFAT) and to investigate the prevalence of N caninum in cattle and dogs in Korea. The neo-antigen kit of IFAT developed in our laboratory was proved diagnostic efficacy by compared with the kit of veterinary medical research and development(VMRD). A survey of N caninum infections among cow and dogs in elevn areas of southern part of country was performed using a IFAT. The infection rate of 190 nationwide cattle was 8.4%(16/190) but was 75%(45/60) at P area in Chunnam province where the cattle showed the abortion repeatedly. Any of the dogs was not N caninum -positive in the Kangwon and Kyonggi areas.

• The Journal of Churna Manual Medicine for Spine and Nerves
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• v.6 no.1
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• pp.141-148
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• 2011

Objectives : To introduce the medicare listing system for the clinicians that korean society of Chuna manual medicine for spine and nerves applies presently and wants to promote. Methods : Compare and analyse the differences, merits and demerits between Palmer-Gonstead listing system and medicare listing system using the publications and literatures of Chuna manual medicine and chiropractic. Results : It is easy to explain the movements and subluxations of spine when using medicare listing system. Also it has simple terminological system that can be applied when diagnosing the lesion of spinal joints with various palpations, Conclusion : Listing system used by Korean society of Chuna manual medicine for spine and nerves presently has very appropriate forms to indicate the movements and subluxations, However, it needs to spread to clinicians who still are using former listing system by continuous education.

• Journal of Veterinary Clinics
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• v.4 no.2
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• pp.449-455
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• 1987

Quick freezing of bovine embryos was attempted after they were predehydrated at room temperature. Combined solutions of 2M glycerol or 2M ethylene glycol in the presence of either 0.5 or 1.0M sucrose in phosphated buffered saline+20% calf serum were compared. The quick freezing method in which embryos were directly transferred in liquid nitrogen vapor for 2 minutes at - l70$^{\circ}C$ before being plunged into liquid nitrogen was used. Post-thaw survival rates in 2M glycerol and 2M ethylene glycol were high with 0.5 M (55.6% and 53.3%) versus 1.0M(38.1% and 31.6%) sucrose(P < 0.05). But survival rates with 2M glycerol and 2M ethylene glycol were not significantly different. Transfer thawed embryos frozen with 2M glycerol and 2M ethylene glycol by 0.5M sucrose resulted in birthrates of 40.9% and 40.0%, respectively compared to 26.3% and 27.2%, respectively, for 1.0 M sucrose(p<0.05). This was 56.0% for fresh control.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2004.10a
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• pp.91-92
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• 2004

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.11
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• pp.1697-1702
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• 2004

In this paper, we proposed the design and calibration method for the near infrared Acousto-Optic Tunable Filter (AOTF). The theory and design principles of AOTF for the visible light are well known since I.C.Chang has developed the parallel tangent condition for the non-collinear AOTF. Deflection angle, frequency-wavelength relation, spectral resolution, etc. were calculated based on the theory of AOTF. From this result, important parameters - incident and acoustic angle - to fabricate AOTF were decided. We measured the spectral resolution and the relation between electrical driving frequency and the Optical wavelength of diffracted light to calibrate the near infrared AOTF. About 40 ∼ 80 MHz electrical frequency was required to get 1200 ∼ 2200 nm near infrared light. Spectral resolution was less than 10 nm in the near infrared region.

• IE interfaces
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• v.9 no.2
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• pp.3-17
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• 1996

Productivity improvement is one of the most challenging problem facing the motor industry. This paper deals with the lot sizing and production scheduling problems of the side frame press shop in a domestic truck manufacturing company. The problems can not be solved simultaneously due to the computational complexity. Thus, we present a heuristic method which solves the two problems sequentially with the objective of maximizing the press utilization while maintaining a minimum inventory level. A micro-computer-based software is developed for easy implementation of the heuristic in the shop floor level.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.131-134
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• 1995

The high efficiency and accuracy in machining the die material can be abtained in high speed machining, so it is necessary to analyze the mechanism of high speed cutting process : cutting force, flank wear. The tool dynomometer with high natural frequency is newly developed. With this device, the mechanism of high speed cutting process is investigated according to speed and feedate.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.14 no.12
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• pp.1233-1240
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• 2004

Condition monitoring and fault diagnosis of machines are gaining importance in the industry because of the need to increase reliability and to decrease possible loss of production due to machine breakdown. By comparing the nitration signals of a machine running in normal and faulty conditions, detection of faults like mass unbalance, shaft misalignment and bearing defects is possible. This paper presents a novel approach for applying the fault diagnosis of rotating machinery. To detect multiple faults in rotating machinery, a feature selection method and support vector machine (SVM) based multi-class classifier are constructed and used in the faults diagnosis. The results in experiments prove that fault types can be diagnosed by the above method.

• Journal of Mechanical Science and Technology
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• v.19 no.3
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• pp.846-859
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• 2005

Support vector machines (SVMs) have become one of the most popular approaches to learning from examples and have many potential applications in science and engineering. However, their applications in fault diagnosis of rotating machinery are rather limited. Most of the published papers focus on some special fault diagnoses. This study covers the overall diagnosis procedures on most of the faults experienced in rotating machinery and examines the performance of different SVMs strategies. The excellent characteristics of SVMs are demonstrated by comparing the results obtained by artificial neural networks (ANNs) using vibration signals of a fault simulator.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2005.10a
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• pp.23-25
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• 2005