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朴海德,洪俊杓,趙顯麒 경북대학교 공과대학 1980 工大硏究誌 Vol.9 No.-
Directional solidification experiments were conducted on Al-NiAl_3 eutectic alloys to analyze the tensile and torsional behaviors quantitatively. The effects of growth rate and copper content on the composite strength were investigated. The composite strength could be estimated by the rule of mixtures. And the calculated tensile and torsional strengths of NiAl_3 fiber were 165kg/㎟ and 28kg/㎟, respectively. In the case of tensile strength, the fiber contribution on the composite strength was great, but in the case of torsional strength the composite strength mainly depended on the matrix.
박해덕,강성군,Park, Hae-Duck,Kang, Sung-Goon 한국재료학회 2001 한국재료학회지 Vol.11 No.11
An electrolytic silver plating process has been successfully developed for terminated electrode parts of dielectric ceramic resonator. High adhesion strength and high Qu is obtained and blister occurance is minimized under plating condition with $HNO_3$750 $m\ell/\ell$ and HF $ 250m\ell/\ell$ solution at $25^{\circ}C$ for 20 minutes. Adhesion strength has the highest value, 3.2 kg/mm$^2$ at etching temperature of $25^{\circ}C$. Adhesion strength, Qu and blister occurance are monotonically increased with the thickness of electrodeposition layer. In case of electrodeposition of Ag, Qu value of 380 has obtained higher than in case of electrolytic Cu plating with Qu value of 325. Therefore, terminated electrode parts of dielectric ceramic resonator reducing dielectric loss can be obtained using prensent process.
박해덕,장도연,강성군,Park, Hae-Deok,Jang, Do-Yeon,Gang, Seong-Gun 한국재료학회 2001 한국재료학회지 Vol.11 No.10
In order to obtain the basic data on the optimum conditions of electroforming process for fabricating the micro wiring pattern for plate type micro- motor core, characteristics of plating bath and properties of deposits were studied with various copper plating baths which contain sulfate, fluoborate, pyrophosphate and cyanide salt, respectively. Cathodic polarization, throwing power, internal stress, texture and surface morphology of deposits were observed. Throwing power of plating solution is deeply related to the polarization curves and the values are in the range of +20∼20%. The order of values ate as follows- pyrophosphate, cyanide, sulfate and fluoborate bath. Internal stresses of deposits are tensile in all of the copper plating bath. Thickness of the deposits plated at the center of holes has the highest value in the pyrophosphate bath and K factor, ratio of height and width of deposit, is 1.44. It was confirmed that the pyrophosphate bath was the best one for the electroforming of wire pattern.
Clinicopathologic Review of the Intraductal Papilloma of Breast
윤대성,유미라,손장신,김금원,이정의,박해덕,최인석,최원준 한국유방암학회 2010 Journal of breast cancer Vol.13 No.1
Purpose: Intraductal papilloma of the breast (IDP) is the most common causes of nipple discharge and it is often a solitary, centrally located tumor that most commonly occurs in the fifth and sixth decades of life. There have been many conflicting reports on the malignant potential of IDP. Methods: From February 2003 to November 2008, we operated 161 patients who were diagnosed with IDP at Konyang University Hospital. A retrospective review of all the pathologic reports and the corresponding radiological reports was undertaken. Results: The mean age of the patients was 43.23 years (SD, ±10.1). Eighty-three (51.6%) had nipple discharge, 37 (44.6%) had bloody discharge and 46 (55.4%) had yellowish serous discharge. Twenty-four had a mass and 2 had both bloody discharge and a mass. Radiologic significant findings were shown on 20 mammography exams, 71 ductography exams and 157 breast ultrasound exams. Onehundred forty-four (89.4%) patients with IDP or papillomatosis had surrounding pathologic lesions in the operated specimen according to the final pathology, 107 (66.5%) had fibrocystic change, 26 (16.1%) had fibroadenoma, 30 (18.6%) had atypical ductal hyperplasia (ADH), 11 (6.8%) had carcinoma in situ and 4 (2.5%) had invasive ductal carcinoma. During the follow up, 7 patients (4.3%) developed recurrent IDP, 3 patients developed ADH and 5 patients developed carcinoma in situ (4 patients had ductal carcinoma in situ and 1 patient had lobular carcinoma in situ). Conclusion: Intraductal papilloma should be closely followed up due to its malignant potential and the surrounding breast tissue with IDP should be carefully evaluated due to the high rate of developing other precancerous lesions.