• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.24-34
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• 2021

실시간으로 유동인구를 계측하는 기술은 다양한 산업 분야에서 공간 밀집도에 대한 통찰력을 제공하여 더 좋은 서비스 환경을 만들어준다. 이에 따라 여러 기업과 학계에서는 특정 공간의 유동인구 데이터를 계측하기 위해 오랫동안 다양한 연구를 시도해왔으며, 최근에는 스마트시티와 디지털트윈의 일환으로 Wi-Fi 신호를 활용한 유동인구 분석 사업화가 더욱 활발한 추세이다. 본 논문에서는 유동인구 데이터를 활용하는 일반 수요자(비전문가)의 관점에서 유동인구 계측 시스템에 대해 쉽게 이해할 수 있도록 설명한다. 구체적으로는 사람들이 소지한 스마트폰으로부터 수집되는 MAC-address 값 기반의 유동인구 추정 방법을 제시하는데, 추정값의 정확도를 분석하기 위해 Real MAC-address와 Random MAC-address 값을 구분한 뒤, Real MAC-address가 추출된 실제 스마트폰 기기 수와 CCTV 화면에 집계된 사람 수를 비교하는 실험을 진행한다. 그 결과 두 데이터 간의 유사한 상관 계수가 나타났다. 이러한 결과에 근거하여 MAC-address 분류를 통한 Wi-Fi Probe Request 기반 유동인구 분석 방법을 제시한다.

• 한국안전학회지
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• 제32권6호
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• pp.137-142
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• 2017

This study deals with the relation between traffic accident and urban decline. The purpose of this study is to develop the regional accident models of elderly drivers. In order to develop the count data models, 2009-2015 traffic accident data from TAAS(traffic accident analysis system) and urban decline data from urban regeneration information system are collected. The main results are as follows. First, the null hypothesis that there is no difference in the accident number between elderly and non-elderly drivers is rejected. Second, 8 accident models which are all statistically significant have been developed. Finally, common variables between elderly and non-elderly are ratio of elderly people, elderly person living alone/1,000 persons and wholesale/retail employments/1,000 persons. This study could be expected to give many implications to making regional accident reduction policy.

• 대한한의진단학회지
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• 제21권1호
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• pp.1-12
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• 2017

Objectives Some major Chinese medical classics like Huangdineijing (黃帝內經) and Nanjing (難經) assert that a normal person breaths 13,500 times every day. It's just half of real breathing cycles of human. So I tried to find a reasonable explanation to solve this conflict between truth and literal description. Materials and methods To find breath count descriptions in Chinese ancient books, I used Kanseki Repository (http://kanripo.org/). To find precedent research on this topic, I used China National Knowledge Infrastructure (http://cnki.net). Results 33 books refers to human breath cycles for a day, and most of them introduce 13,500 as human breathing frequency of one day. Some recent papers on Laoguanshan (老官山) Western Han dynasty manuscripts show new clues on this topic. Conclusion I assume that 13,500 cycles, the incorrect human breathing frequency of a day, might be originated from adjusting the meaning and usage of the word "Xi (息)".

• 한국정보처리학회논문지
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• 제6권5호
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• pp.1351-1361
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• 1999

The wide spread of multimedia system demands a large area viewing display device which can inform a message to many people in open area. This paper is about the design of a large area viewing LED panel control system. The control system runs on 16 bit microprocessor MC68EC000 and has following functions: 16 line clock and time, 2 channel priority interrupt, 2 channel direct memory access, 2 channel 12 bit clock and timer, 2 channel infrared remocon receiver, 2 channel RS-232C with 16 byte FIFO, IBM PC/AT compatible keyboard interface, ISA bus, battery backuped real time clock, battery backuped 256 byte SRAM and watch dog timer. The core circuits are implemented to ASIC, considering lower cost, higher reliability, higher performance, smaller dimension, and lower power consumption. This is verified by simulation and fabricated in 0.6 um CMOS SOG processes. The total gate count is 39,083 and the clock frequency is 48 MGz. The fabricated ASIC is mounted on test board.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2015년도 추계학술발표대회
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• pp.763-766
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• 2015

Smart Healthcare System as an Open Platform (Shesop) is an integrated healthcare system and have several features, one of them is Steppy Application. Steppy does count your step and display on Shesop website. In this system security issues are not properly addressed, while Personal Health Record (PHR) patient stored in the cloud platform could be at risk. In fact, the huge electronic information available online, people needs reliable and effective technique for privacy preserving. In order to improve the security of data which are displayed on the Shesop website, so that anyone who access could not tamper without permission. Recently Xu et al. showed a pseudonym scheme using smart card as a solution in e-health systems which uses discrete logarithm problem with cyclic group. In this paper, we adopt their scheme and use it application into smartphone using Near Field Communication (NFC) to construct security in Steppy apps.

• 재활복지공학회논문지
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• 제8권2호
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• pp.133-138
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• 2014

본 논문에서는 시공간 실루엣 분석을 사용하여 간단하지만 효율적인 보행 인식 방법을 제안한다. 각각의 이미지 시퀀스에 대해, 먼저 차분 기법과 화소기반 적응분할기법이 보행자의 실루엣을 분할하는데 사용된다. 그 후, 사람을 인식하기 위하여 보행하는 사람의 걸음수와 보폭이 실루엣 영상에서 구해진다. 124개의 객체를 포함하는 CASIA 데이터 집합에서의 실험결과는 제안된 방법의 유효성을 보여준다. 또한, 제안된 시스템은 보행자 인식에 대한 응용을 위해 충분한 적용 가능성이 있을 것으로 판단된다.

• 한국생활과학회지
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• 제24권1호
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• pp.69-77
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• 2015

The study will furnish university students-oriented accessary market with preliminary data by virtue of university students' wearing accessary conditions. It conducted by 151 university students in Jeon-Nam and Jeon-Buk during october through november, 2014. The questionnaire is composed of 17 questions and used 151 out of 152 copies as the final data, except for one insufficient reply. The analysis method carried out a technological statistics such as frequency count, percentage, average and t-test for every questions, used by SPSS 20.0. The investigation result is as follows; The overall numbers of answerers were 151 people, 36 male and 115 female, and showed that they purchase accessaries of less than 20,000won in a jewelry shop. According to the 86.1% of university students' answers, the most well known brand is OST and then Metrocity(76.2%), Swarovski(68.9%) came after. The most visit count is to a jewelry shop, once or twice in a month, on-line shopping malls and department stores came after. Rings and bracelets are purchased once or twice in a month, and earrings are mainly put on. When purchasing accessaries, quality and scarcity design are the most significant conditions, getting the information through internet and fashion magazines. The ground of purchasing accessaries is for self-contentment and for coordinating with their fashion, and also the difficult maintenance as well as untangled wool are defined as uneasiness of using accessaries. Furthermore, the original goods are preferred for rings and necklaces, unlike earrings and bracelets.

• 한국화재소방학회논문지
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• 제16권3호
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• pp.12-15
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• 2002

화재에 의한 독성가스의 노출은 인간에게 있어서 화재시 생명에 아주 위험한 요소일 것이다. 다양한 화재에 의한 독성가스의 노출 중 본 논문에서는 경기도 안산시 재개발지구에서 한 연립주택을 이용하여 실재화재와 같은 조건으로 화재 시험을 하였다. 화재시 발생하는 가스 CO, $CO_2$, $O_2$, $SO_2$, NO 및 $NO_2$등을 측정하였으며, 발생하는 가스를 실험동물인 백서(S.D.)에 노출시켜 2분 간격으로 혈액을 체취 하였다. 독성 평가를 위하여 백서의 혈액과 혈청 중 Glucose, AST(GOT), ALT(GPT), CBC Count 및 CO(carboxy)-Hb를 분석하였다. 폭로되는 CO의 농도와 백서의 혈액중 CO-Hb 농도사이에 양-반응 관계(dose-response relationship)를 보였다.

• 컴퓨터교육학회논문지
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• 제15권2호
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• pp.75-81
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• 2012

인터넷 이용자수의 증가에 비례하여 개인정보의 노출 또는 유출로 인한 개인정보 침해사고가 많아지고 있으며, 침해사고로 인한 정신적 피해와 함께 금전적 피해 등을 입는 경우도 증가하고 있다. 개인정보 노출 및 유출은 담당자 및 내부직원의 실수 또는 고의로 인해 일어나는 경우가 대부분인데, 이는 정보 보호와 관리, 보안에 대한 정책 결정 및 운영 등을 담당하는 최고 책임자인 개인정보관리책임자 (CPO, Chief Privacy Officer)의 개인정보보호에 대한 인식 부족이 주원인이라고 볼 수 있다. 이에 행정안전부는 측정 지표를 제시하고 세부 항목을 열거하여 점수를 매겨서 합산한 점수가 일정 수준에 도달하는지 여부를 체크할 수 있는 체계를 구축하였다. 하지만 이는 사후 평가 성격이 강하기 때문에 시스템 구축 또는 계획에 적용하지 못한다는 한계가 있으며 평가자가 원하는 집계는 물론이고 항목별 다양성의 표현이 필요하다. 본 논문에서는, 각 기업의 정보보안 취약점을 파악하고 보안의 방향을 제시할 수 있는 개인정보 영향평가 툴을 제안한다. 본 툴에서는 평가 결과를 방사형 그래프로 제시하고, 세부 항목은 막대그래프로 표시하여 점수와 함께 보여주기 때문에, 기업입장에서는 취약점 파악과 보안의 방향을 파악할 수 있다.

• 한국실내디자인학회논문집
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• 제23권1호
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• pp.122-131
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• 2014

This study aimed to conduct an eye-tracking experiment carried with facade images as a medium and to do research on 'the interest of the eyes' resulted from people's gazing phenomena. This study secured gazing data which appeared according to visual response and analyzed gazing phenomena to find the basic theory of 'the interest of the eyes' as a methodological role, which consumer interest and attention could be grafted when a plan and a design for space design was made. Data terms used in eye-tracking backgrounds and the movement of the eyes were investigated in literature review. Twenty (20) facade images were selected through a case study to get experimental stimuli for the related experiment. Thirty (30) subjects (men and women) suitable for the experiment were recruited to conduct an eye-tracking experiment. After the experiment, five (5) areas were set up in the facade image to identify the focus level of interest and attention. The level of interest and focus was connected to the interest of the eyes. The analysis to study the interest of the eyes was based on nine (9) items such as sequence, entry time, dwell time, hit ratio, revisits, revisitors, average fixation, first fixation and fixation count. Through gaze analysis, the following conclusion was drawn about the 'interest level of sight' for gaze frequency. The interest level can be interpreted to be higher for faster sequence, shorter entry time, longer all fixation(ms) for dwell time, faster all saccade(%), higher hit ratio, more revisits, more revisitors, longer average fixation, faster and longer first fixation, and more fixation count, and the person can be said to have felt interest faster and/or more.