간접접착술식에서 접착제의 종류에 따른 전단결합강도와 파절 양상

장문주,이대희,김현덕,전영미,김정기 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

The purpose of this study was to compare the shear bond strength and failure type of various adhesives in indirect bonding technique. Five types of orthodontic bonding adhesives - ES(Excel sealant), EP(Excel paste), EA(sealant and past), T(Transbond XT sealant), L(Light bond sealant) - were used in this study. Metal bars(70×7×7㎜) were milled and sand-blasted with 50㎛ alumina and then coated with resin. resin blocks(3×4×5㎜) were made and bonded to the resin-coated metal bars with various adhesives. Shear bond strengths were measured by an universal testing machine. The film thickness, interface region. Self-curing resin, EX(Excel sealant) showed the greatest shear bond strength(22.82±3.05 ㎫) and self-curing resin, EP(Excel paste) showed the lowest shear bond strength(13.91±2.70 ㎫). The shear bond strength of self-curing resin, EA(sealant and past : 20.94±0.92 ㎫) was similar to those of light-curing resins, T(Transbond XT sealant : 20.90±2.34 ㎫), L(Light bond sealant : 18.12±1.63 ㎫) group. Most of the failure occurred between the resin coated metal bars and sealant regardless of the adhesives.

GPS를 이용한 안드로이드 폰 자동 설정 어플리케이션 (U need Utility)

배현직;박정길;윤상문;이기주;김흥식 인제대학교 2012 仁濟論叢 Vol.27 No.1

Since the Apple's iPhone was released in Korea, many users use any smartphone. Since smartphones launch in Korea, many users change the previous feature phone to smartphone, and its users continue to increase. One of the advantages of smart phones is that user can install a wanted application like the computer, so the demand of applications has been increasing gradually. We are intended to study the development of smartphone application with location information by GPS. Instead of making the result of current location information by informing current position to users or approved third parties by them, we process their information which needs to be used internally them. And we study the application which changes the status of smartphone automatically by position information.

관측기를 이용한 축소모형 건물의 시스템 식별

이승준,주석준,이상현,민경원,최문식,이영철 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

This paper discusses System Identification using observer in time domain. It is carried out for a experimental Three story structure With Active Mass Damper(AMD). Applying gradually stable method. Observer Kalman Filter Identification(OKID) determines Maskov paramaters. System eigen value is presumed utilizing this variables. Simulation system is composed of this fluents's compounding. It is verticified to compare numerical simulation results with experimental measurements.

단순슬래브 사교의 휨모멘트 산정에 관한 연구

金學秀,文賢珠 호남대학교 2000 호남대학교 학술논문집 Vol.21 No.2

In the Simply Supported Skew Slab Bridge analysis, "The Highway Bridge Standard Specifications of Korea" dose not prescribe exactly a variable of edge supported condition, skew angle and loading condition etc. Therefore, the present standing rules of "The Highway Bridge Standard Specification of Korea" is expected to overestimate the maximum design bending moment of the skew slab bridge. Also, a study on the effective modeling method needs consideration of moment value difference according to modeling method. In this paper, the simply supported skew slabs are analyzed by using finite element program, SAP 90, and the results are compared with those from "The Highway Bridge Standard Specifications of Korea". Modeling method using Shell element is considered as parallelogram mesh, mesh orthogonal to support, mesh orthogonal to span. The moment values from the modelling are compared with the results researched by Nielsen. So this study suggested a proper modeling method and considered the effect of skew angle and ratio of slab length to slab with on moment values using shell and grillage element.

소비자의 기성복 라벨 이용도와 신뢰도

성해련,송현주,김태규,문영주 효성여자대학교 가정대학 학도호국단 1987 家政大論集 Vol.6 No.-

The purpose of this research is in comparing the goods which have been producing in severalcompany and judging them, and examing how much intrested are the consumers in the labels whichgive us informations. In order to certify them we've investigated the degree of confirmation, confidence, utilization andrecognition of the consumers about the labels. The questionnair method was used to obtained the data which was mad by a result of self-adminis-ted questionnair. A size of random sample for this research was 125 subjects. The results are as follows ; 1) Most of the consumers confirm the labels. 2) The degree of the consumers' recognition about the necessity of the labels is nearly correspondwith the utilization of it. 3) The consumers' confidence about the label of ready-made clothes in the open market is relatively low. That's because they(the labels in the open market) are usually incorrect yet and couldn't giveus enough informations.

모체 Thyroxine 투여가 태아알코올효과를 가진 흰쥐 대뇌겉질 및 해마에서 NPY함유 신경세포의 생후 발달에 미치는 영향

김복,박상기,박영란,김종중,문정석,김주수,문영민,현영식,천관영,정윤영 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Background and Objectives: Maternal alcohol abuse is considered to be one of the most prominent cause of neurobiological malformations in the postnatal and adult life of the offspring. In this study, we investigated the effects of maternal alcohol drinking on the postnatal development of NPY-containing neuron, and, the influence of thyroxine treatment on the cerebral cortex and hippocampus of pups of alcohol abused mother. Materials and Method: Time-pregnant rats were divided into three groups. Alcohol-fed group A received 35 calories of liquid alcohol diet daily from gestation day 6; control pair-fed group B was fed a liquid diet in dextrin replaced alcohol isocalorically: alcohol + T4 group C received 35 calories liquid alcohol diet and exogenous thyroxine subcutaneously. Results: Group C showed prominent NPY immunoreactivity in the cerebral cortex compared to group A and B at P7. In group C, NPY-containing neurons were widely distributed in the all layers of cerebral cortex after P14. Besides, numerical decrease of NPY-containing neuron as age increases was not found in group C. However, the decrease of NPY-containing neuron was clearly observed in group A compared to group C after P14. In hippocampus, group Band C were appeared similar patterns after P7. Additionally, in group C, NPY immunoreactivity was prominently appeared in CA2 and CA3 at P14 as compared to group B. Conclusions: The present results showed the increase of intensity and number of NPY-containing neurons in cerebral cortex and hippocampus of pups of exogenous T₄ supplemented alcohol-exposed dams as compared to control pair-fed and alcohol-exposed pups at P7. It presumably suggest that NPY-containing neurons might be regulated by the early postnatal growth stimulatory effect of the exogenously supplemented T₄. Therefore, the increase of NPY synthesis caused by maternal administration of exogenous thyroxine may ameliorate fetal alcohol effect, one of the ill effects as a result of the dysthyroid state following maternal alcohol abuse.

FCP 10 : Retraction of adjacent structure to the tumor: is a sign of aggressive basal cell carcinoma?

( Hyun Ju Jin ),( Gun Wook Kim ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hyun Chang Ko ),( Byung Soo Kim ),( Moon Bum Kim ),( Hoon Soo Kim ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.1

Predicting invasion width and depth of basal cell carcinoma (BCC) is significant to decide excision margin or operative method. Several factors such as male sex, large tumor diameter, histological subtypes, and presence of necrosis were identified as predictors of deep invasion. However, to our knowledge, any specific clinical feature has not been suggested as an indicator of invasion width or depth. We experienced several patients with highly invasive BCC whose morphology showed retraction of adjacent structure to the tumor. Here, we present an 81-year-old man who complained with 2.2 x 2.1 cm sized, crusted and ulcerated plaque on his left temple. His left lateral canthal skin was drawn toward the plaque. Histopathologically, he was diagnosed with micronodular BCC and Mohs micrographic surgery was performed. After 3 stages of Mohs micrographic surgery, the size of final defect was 6.0 x 5.8 cm. Periosteum of zygomatic bone and deep fascia of temporalis muscle were exposed. The defect was reconstructed with full thickness skin graft from left inguinal area. We suggest that retraction of adjacent structure to the tumor could be a sign of aggressive BCC.

P254 : Arborizing telangiectasia on the dermoscopy shown in other conditions than basal cell carcinoma

( Hyun Ju Jin ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Byung Soo Kim ),( Moon Bum Kim ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

Background: Arborizing telangiectasia (AT) is dermoscopically defined as telangiectasia with distinct treelike branching. It has been reported as a specific dermoscopic feature of basal cell carcinoma (BCC). However, several benign tumors showing AT were also reported. Objectives: To describe skin conditions showing AT other than BCC and compare the characteristics of AT in BCC with AT in non-BCC Methods: Total 112 dermoscopic images showing AT were prospectively collected from patients who visit our clinic from May 2012 to August 2013. Those images were classified into either BCC group or non-BCC group. The diameter of the thickest vessel and the maximum number of ramifications were measured. Results: Among 122 images, 69 (61.6%) of them were confirmed as BCC and 43 (38.4%) of them were determined as non-BCC. Non-BCC group includes epidermal cyst, scar, actinic keratosis, angioleiomyoma, intradermal nevus, nipple adenoma, and so on. The mean diameter of the thickest vessel was 0.16 mm in non-BCC vs. 0.11 mm in BCC (p=0.02). The mean number of maximum ramification was 3.47 in non-BCC vs. 3.65 in BCC (p=0.09). Conclusion: There are various skin conditions which show AT under dermoscopy other than BCC. The difference between the dermoscopic feature of AT in BCC and in non-BCC was not very distinct.

P264 : Dermoscopic patterns of dermatofibromas in korean patients: according to the locations and the histological subtypes

( Hyun Ju Jin ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Byung Soo Kim ),( Moon Bum Kim ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

Background: Various typical and atypical dermoscopic patterns of dermatofibromas were reported. However, the features have not been investigated according to the location or the histological subtype. Objectives: To demonstrate the dermoscopic patterns of dermatofibroma in Korean patients according to the locations and the histological subtypes Methods: From January 2006 to July 2013, total 92 dermatofibromas from 81 patients were included in the study. The dermoscopic features were classified into 10 types according to the locations and the histologic subtypes. Results: The most common dermoscopic pattern was atypical pattern (AP), followed by peripheral pigmentation and central scarlike patch (PPCS), total pigment network (PN), multiple scarlike patches (MSP), peripheral pigmentation and central white network (PPCWN), total scarlike patch (SP), homogeneous pigmentation (HP), peripheral pigment network and central white network (PPNCWN), peripheral pigment network and central white patch (PNCWP), total white network (WN), peripheral pigment network and central homogeneous pigmentation (PPNCHP). The most common pattern was PPCS, AP, and MSP in lower extremities, upper extremities and trunk, respectably. The proportion of AP was higher in specific subtypes such as cellular, lipid-laden, aneurismal, and epithelioid dermatofibroma than in typical type. Conclusion: The frequent dermoscopic patterns of dermatofibromas in Korean patients showed difference from the previously reported studies.

Flow and Engineering Properties of Fiber Reinforced Hwangtoh Mortars

Mun, Ju-Hyun,Yang, Keun-Hyeok,Hwang, Hye-Zoo The Korean Institute of Building Construction 2012 한국건축시공학회지 Vol.12 No.3

In this study, six mortar mixes were tested in order to examine the significance and limitations of hydrophilic fiber in terms of its capacity to enhance the tensile resistance of Hwangtoh mortar. Lyocell, polyamide and polyvinyl alcohol (PVA) fibers were selected for the main test parameters. The tensile capacity of mortars tested was evaluated based on the splitting tensile strength and the modulus of fracture, while their ductility was examined using the toughness indices specified in ASTM. Test results showed that the addition of lyocell and PVA fibers had little influence on the flow of the Hwangtoh mortars. To enhance the tensile capacity and toughness index of Hwangtoh mortar, it is proposed that fiber spacing above 0.0003 is required, regardless of the type of fiber.