음낭내의 Sparganum Mansoni 1례

허만우,김용구,전윤수,이남규,박영호 大韓泌尿器科學會 1996 Korean Journal of Urology Vol.37 No.9

사물인터넷 게이트웨이 보안을 위한 사용자 민감 데이터 분류

허만우,박기철,홍지만 (사)한국스마트미디어학회 2019 스마트미디어저널 Vol.8 No.4

IoT 기술이 산업 환경에서 널리 활용되면서, IoT 환경 보안 문제가 중요해지고 있다. 이러한 문제를 해결하기 위해 하드웨어 보안 기능을 활용한 연구가 활발히 진행되고 있다. 그러나, 기존 연구는 IoT 환경에서 하드웨어 보안 기능을 이용할 때 발생하는 성능저하에 대해 고려하지 않았다. IoT 환경에서 주로 활용되는 게이트웨이 기기는 자원이 제한적인 경우가 많다. 이러한 환경에서 하드웨어 보안 기능을 활용하는 것은 게이트웨이와 연결된 IoT 기기가 점점 증가함에 따라 심각한 성능 저하를 일으킬 수 있다. 따라서, 본 논문에서는 자원이 제한적인 환경에서 효율적으로 하드웨어 보안 기능을 활용하기 위한 데이터 분류 기법을 제안한다. ARM 트러스트존을 사용하여 제안한 기법이 적용된 플랫폼을 구현한다. 구현한 플랫폼상에서 실험을 통해 하드웨어 보안 기능으로 인한 성능 저하를 측정하고 제안한 기법을 적용하였을 시 성능과 비교 및 분석한다. As IoT technology is widely used in industrial environments, its environmental security issues are becoming more important. In such a context, studies utilizing hardware security functions are being actively carried out. However, previous studies did not consider the performance degradation that occurs when using hardware security functions in IoT environment. Gateway devices that are mainly used in IoT environments are often resource-limited. Utilizing hardware security in such an environment can cause serious performance degradation as the number of IoT devices connected to the gateway increases. Therefore, in this paper, we propose a data classification scheme to efficiently utilize hardware security functions in resource limited environment. We implement a platform with the proposed technique using ARM Trustzone. Performance degradation due to the hardware security functions is measured through experiments on the implemented platform and compared with the performance as of when the proposed technique is applied.

제 3 분과 섬유산업과 지식경영 : 대구,경북 섬유산업의 구조조정 방안 (인력부문)

허만우 한국중소기업학회 2002 한국중소기업학회 추계학술발표논문집 Vol.2002 No.-

Mono-sodium glycerate에 의한 Poly(ethylene Terephthalate) Film의 분해반응에 관한 연구

許萬宇 慶一大學校 1990 論文集 Vol.6 No.1

This study was carried out with the view of fundamental investigating to improve the tactile and the hygroscopicity of Poly(ethylene Terephthalate) (PET) fibers. Mono-sodium glycerate in glcerine (MSGR-GR) solution was prepared and PET films were treated with it. The following conclusions were obtained. When PET films were decomposed in MSGR-GR solution, decomposition rate constant showed an exponential relationship with treating temperature; activation energy was 19.25Kcal/mol, activation enthalpy was 18.74~18.66Kcal/mol and activation entropy was -43.40~-43.59 e.u. On the basis of the results obtained above it was found that the decomposition reaction proceeded through ester interchange reacion.

활성오니 처리수중에 함유된 미량유기오염물의 생물학적 활성탄 처리시 THM 생성능의 거동

허만우,김정목,한명호 대한상하수도학회 2000 상하수도학회지 Vol.14 No.1

Control of Trihalomethanes(THMs) is a major concern of many water treatment plants. A number of researchers have studied the effectiveness of activated carbon adsorption process in removing THMs or organic halogen compounds. Recently, attention has been paid to the biological activated carbon (BAC) treatment of THM precursors as an alternative to the carbon adsorption treatment because of its effectiveness as well as its low running cost. In this study, changes of THM formation potential(THMFP) and removal of substrates in the SBR effluent were investigated in an attempt to clarify the mechanisms of the decrease/increase of THMFP in the BAC treatment. The increase and decrease of THMFP concentrations were observed in effluents during prolonged operation. When PCP or DBS was feeded as substrate contained in SBR effluent, the THMFPs were easyly removed with TOCs removal. But the case of SBR effluent containing SDS or glycine was introduced, and when microbial growth came to its near steady state, the THMFPs of treated effluents were increased more or less in comparison to those in the influents. Such increases of THMFP coincided with the increase in microbial growth within the activated carbon fiber(ACF) column. In the case of only sucrose was feeded as substrate on ACF colume, THMFP concentrations of effluent were higher than those of influent. The THMFP concentration was significantly increased on inlet part of ACF column, which biomass inhabits abundantly, then they were decreased gradually. These increases mean production of the secondary THM precursors by biological activities, which can be removed by adsorption and biological degradation on ACF column.

도뇨윤활제가 Bacillus Calmette-Guerin의 효과에 미치는 영향

허만우,송호연,이남규 大韓泌尿器科學會 1998 Korean Journal of Urology Vol.39 No.7

환원세정 조건이 Polyester 인조 Suede 섬유의 세탁견뢰도 특성에 미치는 영향

허만우 경일대학교 산업기술연구소 1999 産業技術硏究所 論文集 Vol.6 No.-

This study was investigated the washing fastness of polyester suede fabric after dyeing with 2 different disperse dyes. The results were as followings ; The washing fastness of polyester dyed fabric is greater improved in reduction cleaning with N₂gas replacement than that of without N₂gas reduction cleaning. It is assumed that the use of N₂gas replacement during reduction cleaning gives effective removal of unfixed dye on the fiber surface. The most important factors affecting the washing fastness of polyester suede fabric were found to be the reduction cleaning method and the chemical structure of disperse dye. In this study, the washing fastness of azo type disperse dye showed higher grade than anthraquinone type disperse dye. It was also obtained that the heat treatment of dyed fabric decreased the washing fastness.

침윤성방광암에서 경요도절제술과 고선량체외방사선요법의 효과

허만우,김민의,박영호 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Purpose: We analyzed the role of TURB and definitive radiation therapy as curative treatment of muscle-invasive bladder cancer. Materials and Methods: From Jan. 1985 through Dec. 1992, 23 patients with muscle-invasive transitional cell carcinoma of the urinary bladder who were not candidate for radical cystectomy or chemotherapy were received TURB and pelvic external beam radiation therapy(external beam radiation, mean 6500 cGY, mean 8 weeks). T categorization was based on clinical examination assessing the computed scan and the transurethral biopsy. Results: Of 23 evaluable patients overall 2-year and 5-year survival rate following TURB and radiation therapy were 445(10/23) and 26%(6/23), respectively. Five-year survivals by clinical stage were 3(43%) of 7 with stage T3a, 2(29%) of 7 with stage T3b, and 1(11%) of 9 with stage T4. Overall complete remission and partial remission were achieved in 6(26%) of 23 patients and in 9(39%) of 23 patients, respectively. Complete remission by clinical stage was achieved in 4(57%) of 7 with stage T3a and in 2(29%) of 7 with stage T3b, and in 3(33%) of 9 with stage T4. Acute and self-limited complications of radiation therapy such as dysuria, diarrhea, and urinary frequency occured in 61% of the patients during the radiation therapy. Conclusions: Definitive radiation therapy after TURB is appliable bladder preserving modality in patients with muscle-invasive bladder carcinoma when they are not proper candidates due to general inoperability or due to the patient's preference.

몇 종류의 Sodium Alkoxide 에 의한 PET film 의 分解速度에 관한 硏究

許萬宇,曺煥,金三洙 영남대학교 공업기술연구소 1989 연구보고 Vol.17 No.1

In order to investigate the degradation behavior of poly(ethylene terephthalate) (PET) films,several sodium alkoxide solutions were prepared and PET films were treated in the solutions. The dissolution rate constant and apparent activation energy were calculated by using Hashimoto's equation. From the results of FT-IR and proton-NMR analysis, the following observations were made; 1. The weight of PET film was decreased by exchanging its ester with sodium alkoxide. 2. The dissolution rate constant showed an exponential relationship with treating temperature. 3. The dissolution rate constant of PET films treated with sodium alkoxide was observed in the descending order of sodium ethoxide, sodium n-propoxide,sodium n-propoxide and sodium methoxide. 4. Apparent activation energy of dissolution was 6.00~13.85kcal/mol and was decreased with was increasing concentration of sodium alkoxide and which was observed in the descending order of sodium methoxide, sodium n-butoxide, sodium n-propoxide and sodium ethoxide.

망간 치환 헤모그로빈의 x-ray 구조 특성 : -An analogue of an intermediate ligation state of hemoglobin-

許萬宇,韓甲祚,李鎭湜,韓明鎬 慶一大學校 1999 論文集 Vol.16 No.5

Hemes with magnesium substituted Fe atom are unable to bind oxygen or carbonmonoxide. Hence, a half-liganded hemoglobin can be prepared by saturation with carbonmonoxide of a hemoglobin trtrame comorising α (Fe) hemes and β(Fe) hemes, which constitues an analogue of native hemoglobin molecule at half-saturation. We have determined the T-state structures of tetrames with α (Fe) hemes and β(Fe) hemes with either unliganded (α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂) or carbonmonoxide (α (Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂) Fe α hemes, by X-ray crystallography to a resolution 1.9Å. The two sturctures were refined to yield R-factors of 19.3%, respectively. With the exception of the immediate vicinity of the α heme, the two structures are essentially identical to each other and to native deoxyHb A. In particular, the Mg atom is five-coordinated with bond lengths close to those of Fe, all of the T-state salt bridges are present in both structures, and the α1/β₂(α₂/β₁) interface has the standard native T-state configuration. The structure of the α heme neighborhood of α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂is again virtually identical to that of native deoxyHb A. The α heme neighborhood of α (Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂ differs structurally from that of α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂mainly in the following ways. The Fe atom is displaced into the meme plane, the proximal His F8 lies closer to the heme plane by about 0.5Å, the F and E helices are slightly displaced relative to the heme plane near the heme, but the differences diminish with increasing distance from the heme, and the heme has a saddle-shape distortion in addition to the normal doming. When the α heme planes of α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂, α (Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂ and COHbA are superposed, the α(Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂structure appears as intermediate between the other two: the positions of Fe and the His F8 imidazole are closer to those of COHbA than to those of α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂, but the α (Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂ structure rapidly approaches that of α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂as distance from the allosteic core in increased, so that position of C αF8 (His) of α(Fe(Ⅱ)-CO)₂β(Mg(Ⅱ))₂is already closer to the position in α (Fe(Ⅱ))₂β(Mg(Ⅱ))₂than to that in COHbA .