• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.22 no.6
• /
• pp.121-127
• /
• 2022

Smart mirror is an IoT device that attaches a display and an embedded computer to the mirror and provides various information to the useer along with the mirror function. This paper went beyond the form of dealing with smart mirrors only stand alone device the provide information to users, and constructed a network in which smart mirrors are connected, and proposed and implemented a CoMirror system that allows users to talk and share information with other smart mirror users. The CoMirror system has a structure in which several CoMirror clients are connected on one CoMirror server. The CoMirror client consists of Raspberry Pi, a mirror film, a touch pad, a display device, an web camera, etc. The server has functions such as face learning and recognition, user management, a relay role for exchanging messages between clients, and setting up for video call. Users can communicate with other CoMirror users via the server, such as text, image, and audio messages, as well as 1:1 video call.

• The KIPS Transactions:PartA
• /
• v.10A no.6
• /
• pp.729-736
• /
• 2003

With the rapid growth of the Internet, popular Web sites are visited so frequently that these cannot be constructed with a single server or mirror site of high performance. The rapid increase of Internet uses and uses raised the problems of overweighted transmission traffic and difficult load balancing. To solve these, various schemes of server clustering have been surveyed. Especially, in order to fully utilize the performance of computer systems in a cluster, a good scheduling method that distributes user requests evenly to servers in required. In this paper, we propose a new method for reducing the service latency. In our method, each Web server in the cluster has different content. This helps to reduce the complexity of load balancing algorithm and the service latency The Web server that received a request from the load balancer responds to the client directly without passing through the load balancer. Simulation studies show that our method performs better than other traditional methods. In terms of response time, our method shows shorter latency than RR (Round Robin) and LC (Least Connection) by about 16%, 14% respectively.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2012.10a
• /
• pp.665-668
• /
• 2012

This paper describes research results that 2-D contents, which display in smart phone or tablet PC to be able to see the 3-D stereoscopic by use projection technique. For this research, we have construct four brown-glass into pyramid shape, project each of the four LCD monitors that output from the PC screen into of the four inverted pyramid-shaped mirror and display the 3-D image to the center of the mirror system. For the test, We use tablet PC and server PC(desktop PC) connected by wireless network, tablet PC select contents which is displayed in the server PC, and displayed selected contents into the 3-D image to the center of the mirror system. Through the test, we have showed that it is possible to display 3-D stereoscopic to the 2-D contents by use projection technique. Although, display image is depending on the observer's viewing angle.

• Journal of Advanced Navigation Technology
• /
• v.22 no.5
• /
• pp.472-477
• /
• 2018

In this paper, we develop interactive content services for preventing depression of users through an intelligent Internet of Things(IoT) mirror system. For interactive content services, an IoT mirror device measures attention and meditation data from an EEG headset device and also measures facial expression data such as "sad", "angery", "disgust", "neutral", " happy", and "surprise" classified by a multi-layer perceptron algorithm through an webcam. Then, it sends the measured data to an oneM2M-compliant IoT server. Based on the collected data in the IoT server, a machine learning model is built to classify three levels of depression (RED, YELLOW, and GREEN) given by a proposed merge labeling method. It was verified that the k-nearest neighbor (k-NN) model could achieve about 93% of accuracy by experimental results. In addition, according to the classified level, a social network service agent sent a corresponding alert message to the family, friends and social workers. Thus, we were able to provide an interactive content service between users and caregivers.

• Journal of Korea Multimedia Society
• /
• v.20 no.6
• /
• pp.911-917
• /
• 2017

Tor proxy tool is studied which is most frequently used for ransomeware to penetrate into sensitive information. It will be researched for the malicious methods to spread virus by using Tor and considered a countermeasure to prevent them. We present exit relay methodology for Tor security policy, simulate it, and get a probability to detect the ransomeware. And we compare it with TSS technology which is able to protect the attack via virtual server on exit relay.

• The KIPS Transactions:PartD
• /
• v.9D no.3
• /
• pp.457-466
• /
• 2002

In this paper, we designed and implemented a web-based dictionary of computing which keeps the data up-to-date. This dictionary shows the English information based on the FOLDOC (Free On-Line Dictionary Of Computing) dictionary file at the beginning of searching, and then one or more users can translate the information into Korean. This function is the new one only this dictionary has. Also, we can easily find any words we want to took up, even if we don't know the spelling completely, because the dictionary has various searching interfaces (searching for the words starting with inputted characters, searching for the words including inputted characters in the description, etc.) using a SQL Server DBMS and SQL. The performance test for CPU load factor shows that the server can support at least 1780 users at the same time.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.10b
• /
• pp.1485-1488
• /
• 2001

최근 들어 매우 인기 있는 웹 사이트는 우수한 성능의 단일 서버 또는 미러(mirror) 사이트에만 의존 할 수 없을 정도로 인터넷 사용이 급증하였다. 늘어나는 트래픽을 감당해내며 사용자를 만족시키기 위해서는 클라이언트의 요청들을 여러 대의 서버에 분산 처리 할 수 있는 고성능 웹서버 클러스터링 시스템에서는 제공되어야 한다. 본 논문에서는 부하 분배기를 이용한 로드 밸런싱을 소개하고 지역성과 로드밸런싱의 균형을 이루는 분배 알고리즘을 제시한다. 본 논문에서 제안된 알고리즘은 정적 웹 환경에서의 각 요청들은 작업 시간이 고정되어 있지 않다는 점에 착안하여 유효 요청의 수와 잔여량을 고려한 부하 분배 알고리즘을 개발하였다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04b
• /
• pp.127-129
• /
• 2004

이동 컴퓨팅이 활성화 되면서 데이터의 관리 및 저장을 위하여 내장형 DBMS의 필요성이 증대되고 있다. 클라이언트에서 운용되는 내장형 DBMS는 서버용 DBMS와 동기화 기능이 필요하다. 본 논문에서는 통신 비용절감과 빠른 동기화를 위하여 SQL로 이루어진 로그 정보로 클라이언트와 서버간의 데이터를 양방향 동기화하며 Mirror Table을 가지는 Mid-tier 구조로 안정성을 유지하는 새로운 동기화 서버 구조를 제안한다. 제안된 동기화 서버는 저장 공간과 안정성이 부족한 내장형 DBMS의 데이터를 일관성과 안정성이 있도록 보장하고 통신비용이 최소화될 수 있도록 함으로써 효율적으로 데이터를 관리할 수 있도록 지원한다.

• Journal of the Korea Society of Computer and Information
• /
• v.10 no.5 s.37
• /
• pp.217-226
• /
• 2005

In today's cyberworld, network performance is affected not only by an increased demand for legitimate content request, but also by an increase in malicious activity. In this Paper, we research that network performance was affected by an increase in malicious Hacker who make DoS Attack, DDoS Attack, SYN Flooding, IP Spoofing, etc. in using TCP/IP. We suggest that Packet filtering in Network Level, Gateway Level, Application Level against to Protect by Hacker's attack. Also, we suggest that content distribution in Web Server approaches to mitigate Hacker's activity using Cache Sever, Mirror Sever, CDN. These suggests are going to use useful Protection methode of Hacker's attack.