• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.135-138
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• 2005

Robotic devices have been widely used in many medical applications due to their accuracy and programming ability. One of the applications is a virtual reality medical simulator, which trains medical personnel in a computer generated environment. In this paper, we are going to present an application, an epidural anesthesia trainer. Because performing epidural injections is a delicate task, it demands a high level of skill and precision from the physician. This trainer uses a robotic device and computer controlled solenoid valve to recreate interaction forces between the needle and the various layers of tissues around the spinal cord. The robotic device is responsible for generation of interaction forces in real time and can be used to be haptic guidance that allows the user to follow a previous recorded expert procedure and feel the encountered forces.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.549-552
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• 2018

현재 흔히 사용하는 길찾기 앱은 대부분 2D 로 이루어져있어 초행길인 사람들이 길을 찾는 데 어려움이 있다. 특히 외국인들의 경우 길을 물어봐도 복잡한 길을 정확하게 알려주는 것은 한계가 있다. 따라서 본 논문에서는 외국인들에게 서울의 명소들을 카테고리 별로 나눠서 소개하고, 도보 길찾기와 대중교통 길찾기를 통합하여 제공하는 애플리케이션을 개발한다. 본 논문에서 개발한 애플리케이션은 특히 증강현실에 기반한 길찾기 서비스를 제공함으로써 외국인들이 도보 길을 보다 쉽게 찾아갈 수 있도록 한다. 본 논문에서 개발한 애플리케이션을 통해 외국인들은 서울의 유명관광지들을 보다 쉽고 빠르게 찾아갈 수 있으며, 목적지 주변의 시설들도 쉽게 파악할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1748-1751
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• 2015

이전 연구에서 우리는 목적지까지 안전하게 보행할 수 있도록 하는 시각장애인용 보행안내 시스템을 개발하였다. 보행안내 시스템은 실내외 POI(Point of Interest)와 특정 위치마다 표식을 설치하고 보행 경로 탐색 알고리즘을 개발하여 사용자의 보행 위치를 추정할 수 있다. 실제 테스트베드에서는 시각장애인을 대상으로 실험을 수행하므로 실험 대상자가 위험 상황에 노출될 수 있기 때문에 모니터링이 필요하고 대용량의 실내외 지도 데이터를 저장하고 관리하는 것도 중요하다. 본 논문에서는 실험 대상자를 원격으로 모니터링 하고 대용량의 지도 데이터를 효과적으로 처리하는 제어 관리용 애플리케이션을 소개한다.

• Wind and Structures
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• v.16 no.6
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• pp.617-627
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• 2013

In wind load calculations based on pressure measurements, the concept of 'tributary area' is usually used. The literature has less guidance for a systematic computational methodology for calculating tributary areas, in general, and for scattered pressure taps, in particular. To the best of the author's knowledge, there is no generic mathematical equation that helps calculate the tributary areas for irregular pressure taps. Traditionally, the drawing of tributary boundaries for scattered and intensively distributed taps may not be feasible (a time and resource consuming task). To alleviate this problem, this paper presents a proposed numerical approach for tributary area calculations on rectangular surfaces. The approach makes use of the available coordinates of the pressure taps and the dimensions of the surface. The proposed technique is illustrated by two application examples: first, quasi-regularly distributed pressure taps, and second, taps that have scattered distribution on a rectangular surface. The accuracy and the efficacy of the approach are assessed, and a comparison with a traditional method is presented.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1531-1534
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• 2012

모델기반 아키텍처 MDA (Model Driven Architecture)는 소프트웨어 개발의 추상화 수준을 높이기 위한 최근의 개발 아키텍처이며 완벽한 이해성을 확보하기 위해서 구체적인 구현기술은 반드시 개발자에게 추상적으로 (encapsulation) 숨겨져야 한다. 즉, 개발자는 자동적으로 실행 가능한 시스템으로 변환하는 플랫폼에 구애 받지 않는 모델들 PIM(Platform Independent Model)만을 고려하게된다. 본 논문에서는 MDA 를 캠퍼스 안내 앱에 적용하여 개발함으로써 모바일 디바이스 및 OS 에 독립된 어플리케이션을 개발 방법론을 제시한다.

• East Asian mathematical journal
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• v.37 no.5
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• pp.599-612
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• 2021

In China, Weibo is one of the social platforms with more users. It has the characteristics of fast information transmission and wide coverage. People can comment on a certain event on Weibo to express their emotions and attitudes. Judging the emotional tendency of users' comments is not only beneficial to the monitoring of the management department, but also has very high application value for rumor suppression, public opinion guidance, and marketing. This paper proposes a two-input Adaboost model based on TextCNN and BiLSTM. Use the TextCNN model that can perform local feature extraction and the BiLSTM model that can perform global feature extraction to process comment data in parallel. Finally, the classification results of the two models are fused through the improved Adaboost algorithm to improve the accuracy of text classification.

• International Journal of Knowledge Content Development & Technology
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• v.11 no.1
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• pp.85-111
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• 2021

This study aims to analyze users' assessment of electronic libraries in the mobile app market and promote service improvement based on this. To this end, the basic background and purpose of the research, research method, and research scope were first set, and the relevant literature and empirical prior studies were analyzed. Next, users' evaluations of electronic libraries were collected and analyzed from Google Play Store. Based on the results analyzed, measures to improve the quality of electronic libraries were discussed. Based on the results of the study, the following improvement measures are proposed. Need for systemic improvement and stabilization. Provision of applications suitable for multi-device environments. Resumption of services after systematic inspection after updating. Simplification of sign up, log in, and authentication procedures. User support through real-time chat. Introduction of a detailed assessment of reviews. Provision of guidance and user manual for electronic libraries. Improvements to expand user convenience, and Securing differentiation from other similar services.

• Applied Chemistry for Engineering
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• v.34 no.2
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• pp.99-105
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• 2023

Recently, 2D materials greatly impact in the various applications especially in the energy conversion and storage devices. Among the 2D materials, nowadays researchers are showing their propensity towards the MXenes due to their potential structural and physical properties as well as their use in various applications. Recently, MXenes have been used as filler in polymer electrolytes membranes and as catalytic support to increase the performance of fuel cells (FCs). But this review covers only recent progress and application of MXenes in proton and anion exchange membranes for FCs. Also, this review will provide a significant guidance and broad overview for future research in MXenes based polymer electrolyte membrane for FCs.

• East Asian mathematical journal
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• v.39 no.2
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• pp.229-250
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• 2023

The purpose of this study is to investigate the impact of project learning using chatbots on artificial intelligence literacy. The subjects of the study were a total of 41 students from 1st to 3rd grade of general high school in Gyeonggi-do. Classes were held after school for a total of 6 hours, and the contents of the classes consisted of the concept and characteristics of artificial intelligence, the concept and expression of knowledge, OBT application for Kakao i open builder, guidance on how to create chatbots, and chatbot production practice. As a result of the pre- and post-test of the experimental group, the quantitative value of artificial intelligence literacy increased in all three grades. In the case of second-year students who set up a comparison group, when compared with the results of the comparison group, there was a significant positive effect on the AI literacy result, and female students were found to be more effective than male students.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.310-311
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• 2023

우리나라 범죄율이 지속적으로 상승함에 따라 시민들의 불안은 커져가고 있다. 특히 밤길에 혼자 다니는 것을 불안하게 느끼는 '밤길 불안'이 심해지는 요즘, 안전한 길을 제공하여 사회적 불안감을 낮춰주는 서비스의 필요성이 요구된다. 이에 본 논문에서는 안전 데이터를 활용하여 사용자에게 안전한 길을 안내해주는 애플리케이션을 개발하여 사회 안정성과 공익성에 기여하고자 한다.