• The Journal of Advanced Prosthodontics
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• 제2권1호
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• pp.1-3
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• 2010

BACKGROUND. Even though excellent impression materials are now available for making accurate replication for hard and soft tissue, the numerous dentists have faced lots of obstacles in making simultaneous impressions of multiple abutments. CASE DESCRIPTION. This article describes a modified method of tray fabrication using auto-polymerizing acrylic resin and impression technique for multiple prepared teeth in cases with limitations and difficulties in taking dental impressions. CLINICAL IMPLICATION. This segmental tray technique has several advantages, including higher impression quality, fewer impressions, and being more comfortable for the patient and less stressful for the clinician.

• 인지과학
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• 제14권4호
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• pp.53-63
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• 2003

얼굴 인상과 얼굴의 물리적 특징 사이의 관계를 분석하고 인상이 얼굴의 유사성 판단에 미치는 영향을 조사하였다. 얼굴 데이터베이스로부터 선정한 79개의 얼굴에 대해 '순하다-사납다', '영리하다-우둔하다', '여성스럽다-남자답다', '앳되다-성숙하다'의 네 개 차원에 대한 인상 평정값과 41개의 물리적 특징의 측정값을 수집하였다. 두 가지 값을 대상으로 한 중다 회귀 분석 결과, 얼굴의 물리적 구조가 인상과 밀접한 관계가 있는 것으로 나타났다. 얼굴의 유사성 판단 실험을 통해서 인상이 얼굴 정보 처리 과정에서의 사용 가능성을 확인하였다. 실험 결과, 사람들은 물리적 특징 조건이 비슷할 때 중성 인상의 얼굴보다 동일한 인상의 얼굴들을 더 유사하게 지각하는 것으로 나타났다. 이러한 결과들은 인상이 얼굴 생김새를 표상하는 심리적인 구조로 사용되며 인상 정보가 얼굴 처리 과정에 포함될 가능성이 있음을 시사한다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.1007-1010
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• 2005

This paper presents a fingerprint image registration method. In the fingerprint system, the insufficiency of mutual information between a template and a query fingerprint is one of major factors to deteriorate recognition performance. To overcome this problem, we need to register multiple impressions and integrate their information. Our method matches the ridges from multiple impressions recursively and then registers the impressions to minimize the registration error calculated from the Distance map. Our method use regularized TPS model as the transformation model to compensate for the plastic deformation. We compare our method with 3 prior arts (ICP, Distance Map, Ross's method). Our registration error and its' variance is the smallest and also the average registration error is below 3 pixels.

• The Journal of Advanced Prosthodontics
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• 제11권5호
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• pp.271-279
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• 2019

PURPOSE. The newest technologies for digital implant impression (DII) taking are developing rapidly and showing acceptable clinical results. However, scientific literature is lacking data from clinical studies about the accuracy of DII. The aim of this study was to compare digital and conventional dental implant impressions (CII) in a clinical environment. MATERIALS AND METHODS. Twenty-four fixed zirconia restorations supported by 2 implants were fabricated using conventional open-tray impression technique with splinted transfers (CII group) and scan with Trios 3 IOS (3Shape) (DII group). After multiple verification procedures, master models were scanned using laboratory scanner D800 (3Shape). 3D models from conventional and digital workflow were imported to reverse engineering software and superimposed with high resolution 3D CAD models of scan bodies. Distance between center points, angulation, rotation, vertical shift, and surface mismatch of the scan bodies were measured and compared between conventional and digital impressions. RESULTS. Statistically significant differences were found for: a) inter-implant distance, b) rotation, c) vertical shift, and d) surface mismatch differences, comparing DII and CII groups for mesial and distal implant scan bodies ($P{\leq}.05$). CONCLUSION. Recorded linear differences between digital and conventional impressions were of limited clinical significance with two implant-supported restorations.

• 한국의류학회지
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• 제18권3호
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• pp.311-326
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• 1994

The purpose of this study was to identify 1) the effect of two contexts (job interview, Informal outing) and clothing cues (type, style, color) on male impresssions 2) the effect of perceiver's age on male impressions created by the clothing cues and contexts. The subjects consisted of 256 male undergraduate students and 256 middle-aged men. The experimental materials developed for this study were a set of stimuli and response scales. The stimuli were 8 color photographs of drawings of a male figure in clothing which were manipulated in two levels, each of three clothing cues including type, style and color. The experimental design was full factorial design of $(2^4contex^2{\times}clothing type^2{times}clthing color^2$. Each of the 16 sub-samples includes 16 subjects from the two perceiver group. Questionnaires used to measure perceivers responses to the stimuli were 7-point semantic differential scales composed of 37 bipolar adjectives representing personal traits. The data was processed by factor analysis, ANOVA, multiple classification analysis, Duncan's multiple range test. The major findings drawn from this study were as follows: 1. Three factors emerged to account for the dimensional structure of the impressions of the male figure in clothing in two social situations. These factors involved evaluation, activity and uniqueness. 2. The contexts, clothing types and clothing styles had significant effects on evaluation, activity and uniqueness. The clothing styles had a considerable effect on both evaluation and uniqueness while the clothing types affected activity. The clothing color had least effect on the impression and had only moderate effect on evaluation. 3. Perceiver's age influenced impressions formed by the social contexts and clothing cues. Male college students were least affected by contexts and clothing cues, while middle-aged men wert affected most.

• 한국의류학회지
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• 제20권2호
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• pp.241-256
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• 1996

The purposee of this study was to identify the effect of perceiver's clothing attitude on male impressions created by the clothing cues and contexts. In addition, the effect of perceiver's evaluations of clothing appropriateness on male impressions. The subjects consisted of 256 male undergraduate students and 256 middle aged men. The experimental materials developed for this study were a set of stimuli and response scales. The stimuli were 8 color Photographs of drawings of a male figure in clothing which were minipulated in two levels, each of three clothing cues including type, style and color. The experimental design was full factorial design of 2(contexts$\times$clothing types$\times$clothing style$\times$clothing color). Each of the 16 sub-samples includes 16 subjects from the two perceiver group. Questionnaires used to measure perceivers responses to the stimuli were 7-point semantic differential scales composed of 37 bipolar adjectives representing personal traits. Four aspects of clothing attitude(fashion interest, status symbols consiousness, clothing conformity, practicality & comfort)were used to classify subjects into groups of 20 five-point likers type questionnaires adapted from the previous research. Clothing appropriateness were developed 5 point likest scales for evaluation of a stimulus person in each context. The data was processed by factor analysis, ANOVA, multiple classification analysis, Duncan's multiple range test, cluster analysis, MANOVA and pearson's product moment correlations. The major findings drawn from this study were as follows: 1. Perceiver's clothing attitude influenced impression formed by the social contexts and clothing crises. In three groups classified by their clothing attitude, the status symbol-oriented group was most affected by the social contexts and clothing cues. 2. Perceiver's evaluation of clothing appropriateness was related with impressions by a stimulus person. In summary the effect of contexts and clothing cues on impression formation varied according to perceiver's clothing attitude and clothing approopiateness.

• 대한전자공학회논문지SP
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• 제41권3호
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• pp.93-100
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• 2004

본 논문은 등록 지문의 정보를 융합하여 보다 많은 정보를 이용함으로써 지문 검증의 성능을 향상시키는 방법을 제안한다. 크기가 작은 센서는 많은 응용 분야에 적용시킬 수 있는 장점을 가지지만, 실제 지문을 입력 받는 센서 입력창의 물리적인 크기가 작기 때문에 지문 정보를 충분히 입력받지 못할 뿐만 아니라 등록된 지문 영상과 검증을 위해 입력된 지문 영상 사이의 공통영역이 축소되어 전체적인 시스템의 성능을 저하시키는 문제점이 있다. 이러한 문제점은 등록 영상을 여러 장 받아 그 정보를 융합하여 보다 큰 지문 영역을 표현하도록 함으로써 해결할 수 있다. 이를 위해서는 등록 영상간의 좌표계를 정밀하게 일치시키는 과정이 무엇보다 중요하다. 본 논문에서는 먼저 등록영상 사이의 대응 특징점 쌍을 이용하여 거칠게 일치시킨 다음, 융선의 정보를 포함하는 Distance Map을 이용하여 정밀하게 일치시키는 방법을 사용하였다. 정밀하게 일치된 좌표계를 통해 각각의 등록 지문들의 특징 정보는 하나의 큰 등록 정보로 형성된다. 제안된 방법을 통해 형성된 특징 융합 정보는 보다 넓은 면적의 지문을 표현할 수 있기 때문에 센서 입력창이 작아서 생기는 문제를 극복함으로써 지문 인식기의 성능을 향상시킨다. 본 논문의 실험 견과는 제안한 융합 특징 정보를 이용하는 방법이 그렇지 않은 방법보다 지문 인식기의 성능을 월등하게 향상시킴을 보여준다.

• 한국콘텐츠학회논문지
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• 제20권9호
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• pp.397-413
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• 2020

한국 기업과 사회에서 변화하는 문화적 흐름에 따라 유머는 유용한 인상관리 기법이 될 수 있다. 본 연구의 목적은 유머를 성공적인 인상관리 기법으로 활용하기 위하여 이해해야 되는 요소들을 확인하는 것에 있다. 본 연구는 참여적 관찰(participant observation) 과 인터뷰(semi-structured interviews) 를 통한 질적 연구를 진행하였다. 참여자들은 유머를 통한 인상관리가 대부분 유교문화에 기반을 둔 상대적 역할에 맞춰 사용되며, 상급자(superior) 가 더 적극적이고 다양하게 사용한다고 인식하였다. 그러나 상대적으로 젊은 참여자들은 유머가 기업의 역할에서 벗어날 수 있는 독창적인 인상관리 기법이 될 수 있으며, 이 과정에서 유머가 다양한 해석 및 결과를 나타낼 수 있다는 인식이 참여자들에게 불안감과 스트레스를 주는 것으로 나타났다. 이는 유머를 사용할 때 환경과 소통하는 대상의 문화적 성향을 고려하고, 기업들은 효과적인 인상관리 기법에 대한 교육을 도입해야 의도하지 않은 결과를 피하여 긍정적인 결과를 얻을 것이다.

• The Journal of Advanced Prosthodontics
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• 제5권4호
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• pp.452-456
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• 2013

PURPOSE. The aim of this study was to evaluate the repeatability of the digitizing of silicon rubber impressions of abutment teeth by using a white light scanner and compare differences in repeatability between different abutment teeth types. MATERIALS AND METHODS. Silicon rubber impressions of a canine, premolar, and molar tooth were each digitized 8 times using a white light scanner, and 3D surface models were created using the point clouds. The size of any discrepancy between each model and the corresponding reference tooth were measured, and the distribution of these values was analyzed by an inspection software (PowerInspect 2012, Delcamplc., Birmingham, UK). Absolute values of discrepancies were analyzed by the Kruskal-Wallis test and multiple comparisons (${\alpha}$=.05). RESULTS. The discrepancy between the impressions for the canine, premolar, and molar teeth were $6.3{\mu}m$ (95% confidence interval [CI], 5.4-7.2), $6.4{\mu}m$ (95% CI, 5.3-7.6), and $8.9{\mu}m$ (95% CI, 8.2-9.5), respectively. The discrepancy of the molar tooth impression was significantly higher than that of other tooth types. The largest variation (as mean [SD]) in discrepancies was seen in the premolar tooth impression scans: $26.7{\mu}m$ (95% CI, 19.7-33.8); followed by canine and molar teeth impressions, $16.3{\mu}m$ (95% CI, 15.3- 17.3), and $14.0{\mu}m$ (95% CI, 12.3-15.7), respectively. CONCLUSION. The repeatability of the digitizing abutment teeth's silicon rubber impressions by using a white light scanner was improved compared to that with a laser scanner, showing only a low mean discrepancy between $6.3{\mu}m$ and $8.9{\mu}m$, which was in an clinically acceptable range. Premolar impression with a long and narrow shape showed a significantly larger discrepancy than canine and molar impressions. Further work is needed to increase the digitizing performance of the white light scanner for deep and slender impressions.

• 한국식생활문화학회지
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• 제31권1호
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• pp.73-80
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• 2016

The purpose of this study was to identify the change attributes of food courts inside department stores or shopping centers, which are becoming more sophisticated and gentrified. A survey was conducted regarding customer satisfaction level of food services, which influences customers' revisit behavioral intentions, to provide future development direction. Using an exploratory factor analysis, 55 questions on food and beverage service, atmosphere, comfort, sanitation, and food quality were produced. This study tested how these choice factors affect customers' positive or negative impressions of their dining experiences through multiple regression analysis. Results indicate that 'food service' was the most important factor contributing to customers' positive impressions along with higher revisit behavioral intentions. On the contrary, respondents who received poor 'food service' had higher negative impressions with low revisit intentions. The results and findings of this study will positively influence marketing and customer relationship management and thus help design of successful strategies for food court development.