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공간 키워드 유사도 기반의 부분적 집단 공간 키워드 질의처리 기법
이아현(Ah Hyun Lee),박세화(Sehwa Park),박석(Seog Park) Korean Institute of Information Scientists and Eng 2021 정보과학회논문지 Vol.48 No.10
Collective spatial keyword queries return Points of Interest (POI), which are close to the query location and contain all the presented set of keywords. However, existing studies only consider a fixed number of query keywords, which is not adequate to satisfy the user. They do not care about the preference of a partial keyword set, and a flexible keyword set needs to be selected for the preference of each POI. We thus propose a new query, called Partially Collective Spatial Keyword Query, which flexibly considers keywords that fit the preference for each POI. Since this query is a combinatorial optimization problem, the query processing time increases rapidly as the number of POIs increases. Therefore, to address these problems, we propose a keyword-based search technique that reduces the overall search space. Furthermore, we propose heuristic techniques, which include the linear search-based terminal node pruning technique, approximation algorithm, and threshold-based pruning technique.
학생들의 식품알레르기 유병률 및 학교급식 식품알레르기 표시제에 대한 인식
이아현 ( Ah Hyun Lee ),김규언 ( Kyu Earn Kim ),이경은 ( Kyung Eun Lee ),김성희 ( Seong Hui Kim ),왕태환 ( Tae Whan Wang ),김경원 ( Kyung Won Kim ),곽동경 ( Tong Kyung Kwak ) 대한소아알레르기호흡기학회 2013 Allergy Asthma & Respiratory Disease Vol.1 No.3
Purpose: Prevalence of food allergy and perceptions on food allergen labeling in school foodservice among elementary, middle, and high school students were investigated in Korea. Methods: A total of 1,000 elementary, middle, and high schools were selected in 16 cities and provinces of Korea and students attending the schools were surveyed using a questionnaire modified from the Korean International Study of Asthma and Allergies in Childhood questionnaire in July 2012. Responses from 27,679 students were used for data analysis. Results: The ratio of the students who had experienced food allergy was 12.6%; 7.6% of the responding students had food allergy reactions last 12 months and 6.8% of the students had been diagnosed for food allergy by doctors. Eggs, milk, peach, and crabs were the most frequent allergenic foods for the elementary school 1st graders, 5th graders, middle, and high school students, respectively, who had experienced food allergy last 12 months. The students with food allergy read menus more frequently and were more interest in food allergen labeling in school foodservice than their counterparts. Both of the student groups with and without food allergy perceived food allergen labeling important for the students with food allergy and their parents. Conclusion: The prevalence of food allergy and major allergenic foods varied by school years. The Korean students had positive perception on allergic food labeling in school foodservice. An effective food allergen labeling system for school foodservice should be developed and implemented that reflects prevalence, symptoms, and food allergens among Korean students. (Allergy Asthma Respir Dis 2013;1:227-234)
학생들의 식품알레르기 유병률 및 학교급식 식품알레르기 표시제에 대한 인식
이아현 ( Ah Hyun Lee ),김규언 ( Kyu Earn Kim ),이경은 ( Kyung Eun Lee ),김성희 ( Seong Hui Kim ),왕태환 ( Tae Whan Wang ),김경원 ( Kyung Won Kim ),곽동경 ( Tong Kyung Kwak ) 대한소아알레르기호흡기학회 1991 소아알레르기 및 호흡기학회지 Vol.1 No.3
Purpose: Prevalence of food allergy and perceptions on food allergen labeling in school foodservice among elementary, middle, and high school students were investigated in Korea. Methods: A total of 1,000 elementary, middle, and high schools were selected in 16 cities and provinces of Korea and students attending the schools were surveyed using a questionnaire modified from the Korean International Study of Asthma and Allergies in Childhood questionnaire in July 2012. Responses from 27,679 students were used for data analysis. Results: The ratio of the students who had experienced food allergy was 12.6%; 7.6% of the responding students had food allergy reactions last 12 months and 6.8% of the students had been diagnosed for food allergy by doctors. Eggs, milk, peach, and crabs were the most frequent allergenic foods for the elementary school 1st graders, 5th graders, middle, and high school students, respectively, who had experienced food allergy last 12 months. The students with food allergy read menus more frequently and were more interest in food allergen labeling in school foodservice than their counterparts. Both of the student groups with and without food allergy perceived food allergen labeling important for the students with food allergy and their parents. Conclusion: The prevalence of food allergy and major allergenic foods varied by school years. The Korean students had positive perception on allergic food labeling in school foodservice. An effective food allergen labeling system for school foodservice should be developed and implemented that reflects prevalence, symptoms, and food allergens among Korean students. (Allergy Asthma Respir Dis 2013;1:227-234)
김형선,이주행,이아현,Kim, Hyoung-Sun,Lee, Joo-Haeng,Lee, Ah-Hyun 서비스사이언스학회 2015 서비스연구 Vol.5 No.1
공간증강현실(Spatial Augmented Reality, SAR) 기술은 초소형 프로젝터와 카메라로 구성되어 실제 사물을 인식하고, 물체 표면이나 주변에 상황에 적합한 정보 및 사용자 인터페이스를 투사(projection)하는 기술이며, 최근에는 소형 프로젝터의 등장으로 더욱 각광 받고 있는 기술이다. 본 논문에서는 공간증강현실 기술이 새로운 IT 패러다임으로 부각됨에 따라 이 기술을 이용하여 스탠드 형 모양에 프로젝터-카메라-프로세서를 설치하여 스마트 프로젝션(Smart Projection) 서비스 시스템을 구현하고, 적용한 서비스 구현사례를 소개 하고자 한다. Spatial Augmented Reality (SAR) technology perceives real world objects, and their contexts and augments appropriate information and user interfaces on or around the surface of the objects is a technique of projecting. A SAR device typically consists of a small projector and a camera and a processor, and this technology is becoming more widespread along with the advent of subminiature project In this paper, as the spatial augmented reality technology is being magnified as a new IT paradigm, we introduce our stand-type installation of projector-camera-processor components, discuss our implementation of smart projection service system, and present its use cases.
김대영(Dae-Young Kim),이아현(Ah-Hyun Lee),이건행(Gun-Haeng Lee),김세현(Se-Hyun Kim),이붕주(Boong-Joo Lee) 한국전자통신학회 2022 한국전자통신학회 논문지 Vol.17 No.5
본 논문에서는 현대사회에서 많이 사용되는 키오스크가 시각장애인들이 이용하는 것에 있어서 불편함을 보완해야 한다고 생각하여 편리성을 위한 음성인식 시스템 키오스크를 연구하였다. 초음파센서, 적외선센서를 활용하여 80cm-40cm 범위 안에 시각장애인을 인식하고, MP3 모듈을 통한 키오스크 소개 및 가까이 오도록 유도를 하고 40cm 이내의 시각장애인을 인식하면 MP3모듈을 통해 상품 설명 및 주문을 유도한다. 녹음 기반데이터 음성인식 시스템과 서보모터를 통해 원하는 물건이 출력되는 키오스크를 연구하였다. 제작된 음성인식 키오스크에 대한 적외선, 초음파, 음성인식, 충격감지센서의 동작실험 및 최적화 실험을 통해 시각장애인의 편리성을 위한 키오스크를 제작하였고, 보안성을 강화하기 위해 충격감지센서, 비상벨을 활용했기 때문에 방범적인 측면에서도 기능을 추가한 시스템을 연구하였다. In this paper, we studied the voice recognition system kiosk for convenience, thinking that the kiosk widely used in modern society should compensate for the inconvenience of using by the visually impaired. Using ultrasonic sensor and PIR(Passive Infrared), it recognizes the visually impaired within the range of 80cm-40cm, introduces the kiosk through the MP3 module and induces them to come closer. Also, when the visually impaired within 40cm is recognized, the product description and order are guided through the MP3 module. A recording-based data voice recognition system and a kiosk that outputs desired items through servo motors were studied. A kiosk for the convenience of the visually impaired was manufactured through operation and optimization experiments of PIR, ultrasonic, voice recognition, and shock sensor for the manufactured voice recognition kiosk. Finally, it was confirmed that security can be strengthened by using shock sensors and emergency bells to enhance security.