사용자 인식 스마트 홈 미러

최건영,고성화,김종옥,박은서,김완규,백경동,박동규 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2

The Internet of Things, the core of the Fourth Industrial Revolution, is growing by incorporating various technologies into various fields. Among them, smart home systems that apply IoT technology to home environments are being actively studied. The home hub market, a means of communication for smart homes, is also developing at the same time. As the home hub market develops, security threats are also increasing accordingly. In this paper, 'Smart Home Mirror' is implemented by combining mirror and IoT technologies so that users can use them to communicate with smart home applications and other devices. To meet security issues, users in it are recognized by using face recognition technology and AES between all data communications in it is applied. The proposed device’s usefulness is approved by implementing it in smart home environments.

미맹출 영구치 폭경예측방법의 정확도에 관한 비교연구

최영철,이은영 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.4

The purpose of this study was to determine the accuracy of the prediction methods which are frequently used in the clinic, such as Moyers', Tanaka and Johnston's, Song's Hixon and Oldfather's, Kaplan's, Smith's, These prediction methods were compared to the data, which were obtained from 100 Kyung-Hee University students (50 males and 50 females) with normal occlusion of permanent dentition, using a retrospective statistical analysis. The standard periapical radiopgraphs for the lower premolars using 16-inch long cone technique and the yellow stone dental casts were taken from each samples. The mesiodistal widths of 4 incisors,canine, premolrswere measured on the dental casts, and those of premolars were measured on the radiopgraphs. The correlation coefficients, paired samples t-tests, regression coefficients between the actual measuredments of the samples and the predicted measurements of each methods were analyzed. The results obtained were as follows: 1. The prediction methods using periapical radiographs tended to show a stronger correlation than the methods using dental casts; the correlation coefficients between the actual widths of the lower canine and premolars and the predicted widths of the tested methods were higher in Smith, Kaplan, Hixon & Oldfater, and Tanaka & Johnston (p<0.001). 2. The Moyers' probability chart at 65% showed a tendency toward the least difference between the actual measurements and the predicted widths of the lower canine and the premolars, and the methods of Smith, Kaplan, Tanaka & Johnston also showed a less difference. 3. By means of evaluation in correlation coefficients and paired smaples t-tests, the Smith and Tanaka & Johnston in male, and the Moyers' 65% and Song in female showed a high tendency toward accurate methods. 4. The regression equations by models that are derived from the study were as follows. Male(Lt.) : Y=10.799+0.475X Femle(Lt.) : Y=7.427+0.6.9X (Rt.) : Y=11.043+0.462X (Rt.) : Y=8.475+0.556X 5. The regression equations by radiographs that are dericed from the study were as follows: Male(Lt.) : Y=6.561+0.9720X Femle(Lt.) : Y=4.8656+1.0632X (Rt.) : Y=7.8610+0.9060X (Rt.) : Y=4.5483+1.0843X

장애또래 수용태도에 관한 미술치료 프로그램 개발의 기초연구

최은영 대구대학교 2005 대구대학교 학술논문집 Vol.1 No.1

교육부는 제7차 교육과정을 제시하면서 21세기 정보화?세계화 시대의 사회변화에 적응하고 주도할 수 있는 시민적 자질의 육성이라는 목표를 제시하고 있다. 이를 위해서는 창의적이며, 인간존엄성을 존중하고, 타인을 배려하는 바람직한 인성을 지녀야 한다고 강조하고 있다. 한편 일반아동이 장애를 지닌 또래를 수용하면서 타인을 보다 잘 배려하며, 인간을 보다 존중하게 되는 등 건전한 인성을 지니게 된다고 보고되고 있다. 장애를 지닌 아동 또한 보다 성공적인 통합교육을 받을 수 있으며, 학교를 졸업한 후 보다 적응적인 사회생활에 대한 기반이 마련된다는 점에서 매우 중요하다 하겠다. 이러한 차원에서 일반아동이 장애가 있는 또래를 수용할 수 있도록 하기 위한 노력들이 이루어지고 있다. 최근에는 미술치료가 아동에 대한 매우 효과적인 접근법으로 제시되고 있다. 언어로 하지 못하는 것을 그림이 대신하여 자신을 표현할 수 있게 해주기 때문이다. 아동은 미술을 통해 자신과 주변환경에 대한 생각과 느낌을 표현한다. 아동 나름대로 지각한 타인과의 관계, 개인적인 인식·믿음·태도를 나타낸다. 또한 미술치료를 통해 아동은 타인에 대한 태도가 변화된다고 보고되고 있다. 이상에서 보듯이 미술치료는 장애아동에 대한 일반아동의 긍정적 수용태도 형성에 대한 효과적인 접근법이라 할 것이다. 현재까지는 수용태도 변화를 위한 접근이 그림을 통해 장애특성을 전달하고 순서대로 나열함으로써 장애별 수용태도 등을 확인하고자 하는 데 그치고 있으며, 미술의 보다 적극적인 적용을 통해 수용태도 변화를 시도한 연구는 아직 찾아보기 어렵다. 따라서 본 연구에서는 미술치료를 통한 장애또래 수용 태도 프로그램 개발을 위한 기초연구로서, 장애또래에 대한 일반아동의 수용 태도 변화를 위한 국내연구의 현황(프로그램을 중심으로)을 살피고, 장애또래 수용태도에 대한 미술치료의 의의를 살핀 후, 향후 미술치료 분야의 연구 방향과 과제를 제시하였다. The Ministry of Education presents the 7th Curricula with the object of studies: raising civic disposition to adapt social varieties and to lead the world in the 21st century. To do that, they emphasis that a child must have a appropriate human nature: originality, respecting human dignity, and concerning others. In the mean time, it is reported that the child tends to concern others better when he accepts peers with disabilities. He, also, would respect human dignity. Therefore, child (who has positive attitude to his peers with disabilities) learns better how to assist and care others by understanding differences among individuals. In other word, the child develops appropriate character that our society demands, when he understands and accepts his peers with disabilities. A children with disabilities also can gains several advantages, when their peers have positive acceptances to them. They can take successful integrated education with non-handicapped peers. In addition, it is very important to prepare the beginning of social bonds after they are graduated from their schools. In this point of view, there are many efforts that increase a non-handicapped child acceptance to his peers with disabilities. Lately, it is shown that the art therapy is a significant approach to the child, because painting can display the child’s mind which no word can say. The child express himself and his surroundings by painting. It is also reflected that his perception of relationship with others, and his personal cognition, beliefs, and attitude. In addition, it is reported that the child can be changed his attitude by the art therapy. As the above, the art therapy is a effective approach to raise positive attitude of non handicapped child to his peers with disabilities, however those in these days just refer how the child’s acceptances to different type of handicaps with paintings that show some traits between different handicaps. It is difficult to find a research that try to change attitude by active application of painting. In this basic research provides direction and tasks in the future research to the art therapy program which conducts non-handicapped child’s acceptance to his peers with disabilities, and objectives are below, First, how is the domestic research that does for changing non-handicapped child’s attitude to his peers with disabilities in the present time (focus on program) going on? Second, what is the purpose of the art therapy that deals with it? Third, what is the future direction and tasks of the art therapy approach to achieve this goal? Therefore, the purpose of this study is examining above objectives, and it is analyzed several art therapy researches and some others that related to the topic of changing of non-handicapped child’s attitude to his peers with disabilities.

지문 융선의 방향성 특징추출을 위한 영상 처리

김은영,양영수,강진석,김장형,최연성 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.2

In this paper, it was presented that broadly delivered scanner devices can also used in fingerprint recognition process and then modified existing steps of fingerprint image processing. First, using the adaptive binary method, that effect was certified already, increased the effect of the results. And then, applying table mapping methods that looks for elements from look-up table, decreased the processing time, too. Finally, it was presented that ridge-direction characteristics extracted from these processes can used effectively in the area of fingerprint recognition system.

새고막을 이용한 분말조미료 가공

오영열,강동수,김해섭,김경은,최옥수,배태진 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-

Conditions for processing dried condiments with bloody clam were investigated. The enzymatic hydrolysis for 1 hour was more profitable than hydrothermal extraction to develop flavoring matters from bloody clam. As a result of omission tests, nucleotides were predominated in the taste compounds of bloody clam hydrolysates rather than free amino acids, and the contribution of nucleotides and free amino acids to the taste of bloody clam hydrolysates was remarkable. The major flavoring components of bloody clam hydrolysates were free amino acids and oligopeptides below 500 dalton. When bloody clam hydrolysates were separated with membrane(molecular weight cutoff 500 dalton) for recovering flavor, recovering yields of amino type nitrogen were 92.4%. Proximate compositions of dried condiments prepared with protease hydrolyzed bloody clam were moisture content 3.6%, total nitrogen were 71.2% amino nitrogen were 47.8%. And drying yield, solubility and absorption rates at Aw 0.88 were 21.4%. 86.3% and 6.6%, respectively.

Chlorhexidine varnish가 법랑질의 탈회예방에 미치는 영향

임은경,최영철 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.4

The intention of this study was to investigate the preventive effect of chlorhexidine varnish on enamel demineralization. The sample consisted of 57 first premolars scheduled to be extracted for orthodontic purposes. The control group (N=10) was left untreated and the experimental groups were worn with specially designed stainless steel orthodotic bands on premolar for plaque accumulation. The group(N=9) was worn band only, the group 2 (N=19) was applied with chlorhexidine varnish for one time, and the group 3(N=19)was applied with chlorhexidine varnish for 3 times once a week. After 4 weeks of experimental periods, every specimenwere examined by SEM and Vickers hardness test to evaluate and compare the degree of enamel decalcification. The results were as follows: 1. Although SEM revealed various degree of enamel demineralization in every experimental groups, the group 1 showed more severe demineralizations than the group 2and 3. 2. The mean Vickers Hardness Numbers measured in this study seemed to reveal that there was a statistically significant difference between the control goup and the group 1 (p<0.05), and also a significant defference between the group 1 and the group 2,3(p<0.05). And there was no significant difference between the group 2 and the group 3 (P>0.05). 3. The results of VHN did not deemed to show a statistically significant difference between maxillary premolar and mandibular premolar in both group 2 and group 3 (p>0.05).

운동이 안면두개골의 형태에 미치는 영향

임은경,최영철 大韓小兒齒科學會 2003 大韓小兒齒科學會誌 Vol.30 No.4

호흡기능 또는 근기능이 얼굴의 구조적 관계에 미치는 영향을 평가하고자 어려서부터 한가지 운동종목을 전공하여 온 체육대학 학생 137명을 운동의 유형에 따라, 지속적으로 심폐지구력이 많이 요구되는 운동군(1군), 심폐지구력이 많이 요구되기는 하나 1군보다는 적게 요구되는 운동군(2군), 그리고 순간적인 근력이 크게 요구되는 운동군(3군)으로 분류하고, 정모 및 측모 방사선사진을 계측학적으로 평가하여 다음과 같은 결론을 얻었다. 1. 머리너비길이지수는 모두 단두개에 속하였으며, 각 군간에 유의한 차이가 없었다(p>0.05). 2. 1군과 2군의 얼굴지수는 유의한 차이가 없었으나(p>0.05), 1군과 3군간, 2군과 3군간에는 현저한 차이가 있었다(p>0.05). 3. 얼굴지수와 높은 상관관계를 지닌 각 군의 계측항목은 전하안면높이(상관계수: 0.63∼0.69, p>0.001, 총안면높이, 전상치조높이, 전하치조높이 및 총안면두기높이 등이었다. 4. 3군의 두 개계측치는 전면안면높이(상관계수: 0.36∼0.55, p>0.001) 및 전하안면높이(상관계수: 0.31∼0.56, p>0.001)와 높은 상관관계를 나타냈다. 5. 1군과 2군은 얼굴의 수직 계측치가 전반적으로 컸고, 3군은 수평 계측치가 크게 나타나는 경향을 보였다. The purpose of this study was to investigate differences in craniofacial characteristics of professional sportsmen who have practiced since their prepubertal periods. From the standardized lateral and P-A cephalograms of 137 aportsmen, 7 angular, 19 linear, 4 ratio, and 2 index measurements were measured and evaluated by means of statistical methods. The samples were divided into three groups: Group 1; ice hockey(n=17), football(n=27), basketball(n=16), Group 2; baseball(n=16), gymnastics(n=13), and Group 3; judo(n=18), ssireum(n=10), weight lift(n=20). The results were as follows: It seemed obvious that the cephalic indices of the 3 groups exhibited brachycephalic headform (Group 1; 0.85±0.04, Group 2; 0.85±0.04, Group 3; 0.83±0.06) and there was no statistical difference among the groups(p>0.05). The facial indices of the Group 1 (0.93±0.05) and Group 2 (0.93±0.04) exhibited difinite leptoprosopic facial forms while the Group 3 (0.90±0.04) showed more or less euryprosopic facial form, and there appeared significant difference between the Group 1 and 3 (p<0.05), and also between the Group 2 and 3 (p<0.05). There appeared strong relationships between the facial indices and the facial axis angle, mandibular plane angle, total craniofacial height, total facial height, upper anterior dental height, lower anterior dental height, mandibular length, lower anterior facial height ratio, and especially with lower anterior facial height (p<0.01). It seemed that more of the vertical facial measurements of the Group 1 and 2 appeared to be larger than those of the Group 3.

아크릴릭 레진상을 이용한 클로르헥시딘의 방출에 관한 연구

이은영,최영철 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.4

The purpose of this study was to develop a new way of delivery system of chlorhexidine using self-curing acrylic resin. Different preparations of chlorhexidine, such as chlorhexidine varnish (Chlorzoin) and chlorhexidine diacetate crystalline, were mixed into self-curing acrylic resin with different methods. Every resin plate was made and was immersed in 100ml of distilled water individually, and kept in an incubator at 37℃. Solution(0.8ml) was collected from the each container at every 24 hours, and the amount of released chlorhexidine in the solution was measured in an ultraviolet spectrophotometer at 255nm. Flexural strength of all of the resin plates in the Experiment 2-A and 2-B were measured using Instron at the end of the experimental periods. The results were as follows: 1. It was found that chlorhexidine was released from the experimental groups in the Experiment 1, 2-A, and 2-B. And the release of chlorhexidine from all of the experimental groups showed a pattern of sustained-release preparation. 2. It seemed likely that a condition of "dryness" reduced a release of chlorhexidine from the chlorhexidine varnish. 3. It may be stated that a method of "chlorhexidine diacetate mix" with the polymer be more efficient than a method of "Chlorzoin mix" with the monomer. 4. Although it was evident that a flexural strength of the acrylic resin plates be reduced by a mix of either Chlorzoin or chlorhexidine diacetate crystalline, it seemed likely that the resin plates except Group 4 and 5 in the Experiment 2-B may be usable in the clinical situation.

안구의 비색소성 모양체 상피에서 발생한 유두상 선암종 -1예 보고-

최현주,최영진,이연수,이은정,강석진,김병기,심상인 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.12

유구치 상아질의 각 부위에 적용된 수종의 복합레진 접착제의 미세인장접착강도에 관한 연구

유정은,최영철,최성철,박재홍 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.3

본 연구는 유구치 상아질의 각기 다른 부위(표층부, 심층부, 치경부)에서 복합레진 접착제의 접착강도를 비교, 평가하기 위하여 임상에서 흔히 사용하고 있는 서로 다른 4종의 접착방식(3-step total etch: 1군, 2-step total etch: 2군, 2 step self-etch: 3군, all-in-one: 4군)을 적용하고 복합 레진(Light-Core™ Core Build-Up Composite)을 적층한 후, 미세인장접착강도를 비교하였을 때 다음과 같은 결과를 얻었다. 1. 접착방식간의 비교에서 레진의 접착방식에 따른 상아질 각 부위에서의 미세인장접착강도는 제 1군이 표층부에서 뚜렷이 높았으나(p<0.05) 2, 3, 4군은 부위에 따른 차이가 없었다. 2. 부위별 미세인장접착강도를 비교하여 보았을 때 상아질 표층부에서의 미세인장접착강도는 레진의 접착 방식간에 차이가 없었으나, 심층부에서는 2군, 3군, 4군 및 1군의 순으로 나타났고(p<0.05), 치경부에서는 2군과 3군이 1군과 4군에 비하여 현저히 높았다(p<0.05). The purpose of this study was to evaluate the micro-tensile bond strength (μTBS) of four luting resin to regional dentin of human primary teeth. Dentin from non-carious primary molars were prepared from different regions(s, superficial dentin; d, deep dentin; c, cervical dentin), and divided into groups based on anatomical locations and types of luting resins(Scotchbond Multi-purpose: SB ; One-Step: as ; AdheSE Bond: ASE ; G-Bond : GB) : SB-s, SB-d, SB-c; OS-s, OS-d, OS-c; ASE-s, ASE-d, ASE-c ; GB-s, GB-d, GB-c. Luting resins were used according to the manufacturers' instructions, to bond Light-Core™ Core Build-Up Composite) to the exposed dentin specimens in the light-curing mode. After storage for 1 day, μTBS was tested at a cross-head speed of 1 mm/min. Data were analyzed with T-test and two-way ANOVA. The bonding interface and fractography analyses were performed with SEM. The results were as follows : 1. μTBS to superficial dentin was significantly higher than to deep dentin for SB(p<0.05). But there were no significant differences in regional μTBS among as, ASK GB(p>0.05). 2. There were no significant differences in μTBS to superficial dentin among each groups. But, in deep dentin, μTBS of SB-d was significantly lower than those of OS-d, ASE-d, and GB-d(p<0.05). μTBS of OS-d was significantly higher than those of GB-d(p<0.05), but there were no significant differences in μTBS of ASE-d. There were no significant differences among μTBS of ASE-d, OS-d, and GB-d.