안면 인식 기반의 스마트 도어는 카메라를 이용하여 영상을 수집하고, 추출된 안면을 인식하여 방문자의 등록 여부를 판단하는 생체인증 시스템이다. 최근 1인 가구 수의 증가에 따라 출입 편의에 대한 요구가 증가하고 있다. 이에 따라 안면 인식 기법을 이용한 스마트 도어에 관한 연구가 활발하다. 안면 인식 기반의 스마트 도어는 딥러닝 기법을 이용하여 방문자의 안면을 인식한다. 그리고 방문자의 얼굴과 등록자의 얼굴의 차이를 엔코딩을 거쳐 거리로 환산한다. 두 안면의 거리가 임계값 보다 작으면 동일 인물로 판단하여 문을 열어주게 된다. 안면 유사도 임계값은 지역, 인종, 의복 문화에 따라 차이를 가지는데 임계값의 설정에 따라 생체인증 성능이 달라진다. 기존의 연구에서는 등록 여부의 판단 기준이 되는 안면 유사도 임계값을 0.4의 상수를 사용하였다. 본 논문에서는 안면 유사도 임계값을 다섯 가지 이진 분류기를 이용하여 산출하여 생체인증 성능을 비교하였다. LFW 데이터세트를 이용하여 실험한 결과 상수를 사용하였을 때 보다 평균 EER 16.59%가 개선되었다.
Consumers typically make choices based on a menu that lists a variety of food items. Prior research has shown that the position of food items within a menu (center vs. edge) can impact choices (e.g., edge preference and edge aversion). This research extends the literature by demonstrating that the display format of a menu (horizontal vs. vertical displays) can determine the relative impact of these influences. Two experiments find that the middle options are preferred when food options are displayed horizontally (vs. vertically), whereas the edge items are preferred under a vertical display (vs. a horizontal display). These differences extend to different types of foods (food vs. beverage), and to even and odd numbers of options (e.g., four vs. five). These findings increase the understanding of how food item displays can influence consumer choices, and provide important implications for practitioners and policymakers, including how to effectively position food items.
This study is for better understanding about the process of students' conceptual change. As a starting point, it is assumed that the process of students' conceptual change can be viewed as the process of the successive refinement and articulation of students' conceptual framework. Based on the theoretical review of conceptual change literature, various processes, which can be involved in the above assumed process, can be found. And also, by analyzing the process of development of scientific knowledge about Planck's blackbody radiation law and Bohr's atom, six types of processes of refinement and articulation of scientific knowledge can be found. It is hoped that these theoretical discussions can guide the direction for obtaining and interpreting the students' real responses during the process of conceptual change.
This study investigated student's prior conceptions and evidence evaluation about Light and shadow. One hundred twenty six students were given Explanation-after-choice type Questions to investigate student' prior conceptions and Choicd type Question to identify student's idea about scientific method and characteristics od observation. Forty-four of the 126 students were interviewed to explore student's evidence evaluation. Eighty students (63.5%) thought that the shape of material affected the shape of shadow but the shape of light source did not Only 58.8 precents of all responses were evidence-based responses. Characteristics of evidence affected student's evidence evaluation : student made evidence-based responsed to the accord evidence more frequently than discord evidence. Among evidence-based response to the discord evidence. 35.5% of responses were the case that student felt cognitive conflict or explored other variables by recognizing discord between his/her own ideas and evidence or distort the evidence. Student's idea about characteristics of observation did not affect the evidence evaluation, but student's idea about scientific method affected the evidence evaluation.
Recently, message brokering services that are based on publish and subscribe paradigm are widely adopted in many areas such as remote facilities monitoring. Typically, they support a large scale distributed network of exchanging messages between services and clients. In this paper, we introduce a cloud-based message brokering service which allows better scalability and dynamic load balancing between brokers. Our system framework monitors each virtual machine (VM)'s resources and in order to meet the service level agreement (SLA), a VM is rented or recollected automatically by the system. The framework also provides the best available broker that a client can use for connections. Our experimental results show that our system framework can achieve up to 58.60% of scalability improvement at the maximum number of subscriber connections.
Notre these a pour objet d'examiner les doctrines de condillac, de main de biran et de bergson sur un point precis: origine et generation de la connaissance. L'attitude fondamentale de ces philosophe converge, a nos yeux, sur une inspiration commune qui fonde le courant du spiritualisme francais qu'on peut caracteriser a la fois comme une philosophie de la conscience et comme une philosophie positive. Tout d'abord, condillac se situe a l'aube de ce courant en ce qu'il part de l'interet psychologique et reflexif pour eclairer l'originie et la generation de la connaissance. De son cote, main de biran, veritable representant du spiritualisme francais, travaille dans la voie ouverte par condillac, en elaborant la theorie de la motilite qui a son originie dans le toucher actif developpe par condillac. Aussi etablit-il l'ontologie du corps inherent en erigeant la motilite en principe essentiel de notre corps. Enfin la philosophie bergsonienne, si originale soit-elle, represente sous certains aspects essentiels le spiritualisme positiviste, notamment en ce qui concerne la defintion du corps propre comme fonction sensori-motrice et la mise en relief de l'attention dans la formation des connaissances. La philosophie de la conscience en tant qu'activite est un veritable lien qui eclaire la filiation de nos trois philosophes.
Abstract This studyinvestigates embarrassment related to condom purchase, carrying, storage, use, and disposal in three countries. We identifythe consequences of purchase embarrassment for condom use and explore strategies that individuals use to cope with purchase-related embarrassment. Surveys were distributed in Shanghai, China and Seoul, Republic of Korea based on a surveydeveloped and previouslydistributed in Vancouver, Canada. Despite different levels of development and differences in attitudes and policies toward sexualityin these countries, we find remarkablysimilar results. In all three countries, condom-related embarrassment extends beyond condom use to pre- and post-use situations. The embarrassment associated with purchasing condoms exceeds that of using condoms, and purchase-related condom embarrassment significantlyand negativelyimpacts the frequencyof condom use. Individuals use multiple coping strategies to combat purchase-related embarrassment until this embarrassment decreases with age and experience, and coping strategies are no longer needed to enable condom purchase. In short, embarrassment associated with condoms goes beyond embarrassment about condom use. Purchase-related embarrassment and the strategies individuals use to cope with this embarrassment must be considered in order to promote consistent condom use and improve sexual and reproductive health worldwide. Keywords: condomsacquisitionAIDSSTI
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