Point-Location모델을 이용한 산지시장가격의 동태적 구조 분석

최규섭,권용덕 한국농업정책학회, 한국축산경영학회 2000 농업경영정책연구 Vol.27 No.1

This study uses a cointegration method based on point-location model to analyze spatial price relationship among kyungpook cattle markets in korea. According to the results, there is a cointegration relationship between prices of male and female cattle markets. This suggest that these markets are linked with the single market spatially. The prices of Koryoung female cattle market in south and Youngju female cattle market in north have influence on the price change of other female cattle market and play an important role in price movement of other female cattles. In case of impulse response results, the price of female cattle market appears to adjust to equilibrium level faster than that of male cattle market.

약물치료에 순응도가 낮은 마취고위험군의 전립선비대증에서 TUNA의 임상적 경험

성용완,최은용,김덕교 大韓泌尿器科學會 2001 Korean Journal of Urology Vol.42 No.10

인산염계 내화물의 기계적 물성 및 내부식성에 대한 핵형성제 첨가효과

이덕용,이재춘,최광훈,김병균,신경숙 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

The effect of nucleants was studied on the mechanical property and corrosion resistance of phosphate refractories used for high temperature inorganic binder It was found that a mixture of TiO₂ and ZrO₂ nucleants yielded not only the best corresion resistant but the highest strength phosphate refractory. However, the effects of nucleants on the mechanical property of the refractories could not be identified in this study because each sample showed different porosity which was also presumed to affect the fracture strength of the refractory.

Ni-Zn 페라이트의 透磁率과 磁氣抵抗에 미치는 添加物의 影響

강재덕,최희태,서강수,신용진 明知大學校 産業技術硏究所 1990 産業技術硏究所論文集 Vol.9 No.-

This paper is studied on the effects of additive of permeability and magnetic reluctance of Ni-Zn ferrites. Ni-Zn ferrites was composed of 20mo1% NiO, 30mo1% ZnO, 50mo1% Fe₂O₃, and 0.0025n1o1%, 0.005mo1%, 0.01 mol% ??, Bi₂O₃, ?? were used as minor additive Sintering was carried oui at 1100℃. As results from the experiments, the initial permeability was proportional inversely to magnetic reluctance. It was observed that the better magnetic properties of initial permeability anti magnetic reluctance could be achieved by the additive ??.

골결손부 치유과정에서 cone beam형 전산화단층영상의 정확도

강호덕,김규태,최용석,황의환 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2

Purpose : To evaluate the accuracy of the imaging reformation of cone beam computed tomography for the assessment of bone defect healing in rat model. Materials and Methods : Sprague-Dawley strain rats weighing about 350 gms were selected. Then critical size bone defects were done at parietal bone with implantation of collagen sponge. The rats were divided into seven groups of 3 days, 1 week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, and 8 weeks. The healing of surgical defect was assessed by multiplanar reconstruction (MPR) images and three-dimensional (3-D) images of cone beam computed tomography, compared with soft X-ray radiograph and histopathologic examination. Results : MPR images and 3-D images showed similar reformation of the healing amount at 3 days, 1 week, 2 weeks, and 8 weeks, however, lower reformation at 3 weeks, 4 weeks, and 6 weeks. According to imaging-based methodologies, MPR image revealed similar reformation of the healing amount than 3-D images compare with soft X-ray image. Among the four threshold values for 3-D images, 400-500 HU revealed similar reformation of the healing amount. Histopathologic examination confirmed the newly formed trabeculation correspond with imagingbased methologies. Conclusion : MPR images revealed higher accuracy of the imaging reformation of cone beam computed tomography and cone beam computed tomography is a clinically useful diagnostic tool for the assessment of bone defect healing.

개불과 넙치의 혼합 사육시 성장과 사육환경의 변화

김용구,박일웅,안윤근,배애란,최상덕 國立麗水大學校 環境問題硏究所 2004 環境硏究論文集 Vol.6 No.-

This present study was conducted to determine the effects of sea water quality and sediment quality on growth and body composition in poly culture system, Paralichthys olivaceus and Urechis unicinctus. The seawater temperature of the experimental groups was ranges of 17.1~23.8℃, the lowest in 0 day and the highest in 70 day. The concentration of COD was 1.2~1.6㎎/ℓ, DIN 6.19~28.89㎎/ℓ in the D group. Mean IL concentration was 5.42~5.07% and it was maximum in 0 day and relatively minimum 70day. The concentration of AVS was 0.36~0.22㎎/g-dry, COD 4.36~4.08㎎/g-dry in the D group. Growth and feed intake of fish were affected by diets and feeding frequencies(P<0.05). There were differences at all experimental groups especially C group and control group but A, B group and C, D group were not difference. The lowest increased body weight was observed 4.7g in the D experimental group and the highest experimental group was observed 8.6g in the C group.

신경계 질환 환자에 대한 영양보충제 '뉴케어'의 임상적 효과

김용재,박기덕,최경규 梨花女子大學校 醫科大學 醫科學硏究所 1997 EMJ (Ewha medical journal) Vol.20 No.2

연구목적: 질병의 경과에 미치는 영양상태의 중요성은 이미 알려져 있지만, 임상의사가 직접 환자를 대할 때는 영향 결핍 상태를 흔히 간과하게 된다. 본 연구는 연하곤란으로 영양불량 상태에 있는 신경계 질환 환자군에서 영양보충제인 뉴케어를 경구 투여하였을 때, 환자의 질병 회복과 영양상태의 개선에 미치는 임상적 효과를 평가 하고자 하였다. 연구방법: 뇌졸중, 뇌출혈, 노인성 치매 등의 신경계 질환으로 연하장애 상태에 있는 환자들을 대상으로 하여 영양보충제인 뉴케어를 투여한 후 혈액학적, 혈액화학적 변화와 주관적 부작용 등을 평가하였다. 결 과: 연구에 사용한 여러 척도 가운데 혈장 알부민치와 영양지수의 변화가 유의하게 나타났다. 뉴케어를 투여한 군에서 혈장 알부민이 전ㆍ후 각각 44.6 48.2로 전ㆍ후 각각 44.6, 44.1를 보인 대조군에 비해 유의한 증가를 보였다.(p<0.05). 몇 몇에서 설사가 나타나기도 하였으나 투여를 중단할 만한 뚜렷한 부작용은 관찰되지 않았다. 결 론: 이상으로 신경계 질환 환자에서 뉴케어는 혈청 알부민과 영양지수의 증가를 일으켰으며, 안전하고 효율적인 영양보충제로 생각된다. Patients suffering from neurological disorder, such as cerebral infarctoin, often face serious swallowing difficulty and malnutrion. Although the importance of nutritional support has been well demonstrated, malnutrition remains a frequently neglected condition in the clinical setting. In this study, we investigate the effectiveness of enteral nutritional support to neurological patients using nutritional beverage Nucare. 50 patients with acute and chronic neurological disease with eating problem were participated. 27 patients(experimental group : 17, control group :7), fed more than 7 days, were selected and statically analyzed by the changes of hematologic, biochemical parameters and nutritional index compared with control roup(p<0.05), which are good predictors of nutritional and hospital outcome. This suggests that enteral nutritional support with Nucare can improve the nutritional status and clinical outcome of patient with acute and chronic neurological disease.

고령토로부터 알루미나 추출 잔분 활용에 관한 연구

이덕형,이용근,최세영 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.2

Autoclaved hydrate of CaO-SiO₂-H₂O system was investigated according to CaO/SiO₂ mole ratio and the condition of hydrothermal treatment. Residual product for extraction of alumina from hydrochloric acid treated domestic kaolin and Ca(OH)₂ were used as the source of SiO₂ and CaO, respectively. The main crystalline phases were C-S-H(I), tobermorite, xonotlite and transformed in order of C-S-H(I) → tobermorite → xonotlite as hydrothermal temperature, time, CaO/SiO₂ mole ratio increase. The porosity and absorption were increased with increasing CaO/SiO₂mole ratio and hydrothermal treatment time. The bending strength was dependent on the balanced bond between the residual and hydrothermal products, and tended to be maximum at CaO/SiO₂ of 0.6, and hydrothermal temperature of 140℃.

근거리 수치화상에 의한 정밀측정에서 자유망 번들조정의 효과

이진덕,최용진,장기태 金烏工科大學校 産業技術開發硏究院 1999 産業技術開發硏究 Vol.15 No.-

The vision metrology system employing still-video imagery for industrial measurement has the potential of automated measurement with high accuracy. This paper was focussed on ascertaining the impact of free-net technique in self-calibrating bundle adjustment. The practical measurement of a three dimensional test field was conducted using a vision metrology system which was composed of a high resolution still-video camera, a PC-based image mensuration algorithm and a self-calibrating bundle adjustment program. As a result, free-net technique, which does not require any control points with pre-known object space coordinates, went up about 12% in accuracy compared to traditional standard technique. Therefore free-net bundle adjustment is expected to be able to be used efficiently for industrial applications such as dimensional inspection, deformation monitoring and so on.

디에틸아민과 브롬화벤질류의 反應速度論

구본기,최성용,김덕기,김영철 漢陽大學校 自然科學硏究所 1997 自然科學論文集 Vol.16 No.-

아세토니트릴 용매내에서 파라치환 브롬화벤질류(p-CH₃, p-H, p-NO₂)와 디에틸아민의 반응을 고진공하에서 온도(20, 25, 30℃) 변화에 따라 속도론적으로 연구하였다. 이때 반응속도상수는 온도가 증가함에 따라 증가하였으며, 또한 기질에 전자 주게 치환체(p-CH₃)가 치환된 경우 증가하였다. 이들 반응속도상수로부터 활성화에너지(Ea), 활성화엔탈피(???), 활성화엔트로피(???), 활성화자유에너지(???) 및 Hammett 반응상수 ρ를 구하였으며, 전반적인 반응메카니즘은 dissociative ??? 반응으로 진행됨을 알 수 있었다. The reaction rates of p-substituted benzyl bromides(p-CH₃, p-H, p-NO₂) with diethylamine have been measured by conductivity method in acetonitrile, and pseudo-first order and second order rate constants are determined at 20℃, 25℃, and 30℃. The rate constants are increased with a function of temperatures and are further increased by introducing the electron donating substituents in substrates. The activation energies(Ea), activation parameters(??????) and Hammett ρ values are calculated from the rate constants and, generally, the results of these studies show a greater degree of bond breaking than bond formation in the transition state.