A Study on a Method for Detecting Leak Holes in Respirators Using IoT Sensors

신우창 한국인터넷방송통신학회 2023 International journal of advanced smart convergenc Vol.12 No.4

The importance of wearing respiratory protective equipment has been highlighted even more during the COVID-19 pandemic. Even if the suitability of respiratory protection has been confirmed through testing in a laboratory environment, there remains the potential for leakage points in the respirators due to improper application by the wearer, damage to the equipment, or sudden movements in real working conditions. In this paper, we propose a method to detect the occurrence of leak holes by measuring the pressure changes inside the mask according to the wearer's breathing activity by attaching an IoT sensor to a full-face respirator. We designed 9 experimental scenarios by adjusting the degree of leak holes of the respirator and the breathing cycle time, and acquired respiratory data for the wearer of the respirator accordingly. Additionally, we analyzed the respiratory data to identify the duration and pressure change range for each breath, utilizing this data to train a neural network model for detecting leak holes in the respirator. The experimental results applying the developed neural network model showed a sensitivity of 100%, specificity of 94.29%, and accuracy of 97.53%. We conclude that the effective detection of leak holes can be achieved by incorporating affordable, small-sized IoT sensors into respiratory protective equipment.

재현 가능한 위조지문 탐지 알고리즘 성능 평가를 위한 VTS 포맷 제안

신우창 서경대학교 산업기술연구소 2011 産業技術硏究所論文集 Vol.26 No.-

As biometric technologies such as fingerprint recognition technology become more widespread, the danger posed by security attacks using forged fingerprints is increasing. To counter this threat, diverse technologies are being developed to detect fingerprint forgery. However, there is no reproducible performance evaluation method for forged fingerprint detection algorithm. In this paper, a VTS (vitality test sample) format compatible with international standards is proposed. A reproducible performance evaluation of forged fingerprint detection algorithm can be done with the proposed VTS.

A Study on the Design of Real-Time Monitoring System Using IoT Sensor in Respirator

신우창,노정규 한국인터넷방송통신학회 2020 Journal of Advanced Smart Convergence Vol.9 No.3

A lot of research has been conducted on a system that collects and observes patients' health information in real time using Internet of Things (IoT) technology, and cares for and supports patients based on this. However, most studies have focused on underlying diseases such as diabetes or cardiovascular disease, and research on IoT systems to cope with respiratory infectious diseases such as COVID-19 is still insufficient. In a COVID- 19 situation, the purpose of using an IoT respirator may vary depending on the user. In this paper, we design a system that can adequately cope with respiratory infectious diseases such as COVID-19 by applying IoT technology to respiratory protection. We categorize IoT respirator wearers into patients, medical staff, and self-quarantine persons, and define the purpose and use case of the IoT respirator system according to each classification. The proposed IoT respirator system was designed to achieve each purpose. We developed a prototype system consisting of a smart sensor, a communication module, and a non-motorized hooded respirator to show that the proposed IoT respirator system works.

시각화방법을 이용한 객체지향프로그래밍 교육에 관한 연구

신우창 한국정보교육학회 2017 정보교육학회논문지 Vol.21 No.5

4차 산업혁명시대를 맞이하여 학생들에 대한 프로그래밍 교육이 더욱 중요시되고 있다. 그러나, 학생들이 프 로그래밍 능력을 습득하는 데에는 많은 시간과 연습이 필요하다. 특히, 산업현장에서 널리 사용되고 있는 JAVA, C++와 같은 객체지향언어를 학습하는데 있어서 학생들은 더욱 많은 어려움을 느낀다. 본 논문에서는 객 체지향프로그래밍 개념을 교육하고, 기능을 이해하며, 소스코드 분석 및 이해향상에 도움을 줄 수 있는 객체 상 호작용 시각화 방법을 제안한다. 제안된 시각화 방법은 기존 소스코드를 자동적으로 변경하여 프로그램 실행과 동시에 객체들이 동작하는 모습을 시각적으로 보인다. In the era of the Fourth Industrial Revolution, programming education is becoming more important. However, it takes a lot of time and practice for students to acquire programming skills. In particular, students find it more difficult to learn object-oriented languages such as JAVA and C++, which are widely used in the industrial field. In this paper, we propose a visualization method of object interaction that can help to educate the concept of object- oriented programming, understand functions, and improve source code analysis and understanding. The proposed visualization method automatically changes the existing source code and visualizes the operation of the objects simultaneously with the execution of the program.

Performance Comparison of Parallel Programming Frameworks in Digital Image Transformation

신우창 한국인터넷방송통신학회 2019 International Journal of Internet, Broadcasting an Vol.11 No.3

Previously, parallel computing was mainly used in areas requiring high computing performance, but nowadays, multicore CPUs and GPUs have become widespread, and parallel programming advantages can be obtained even in a PC environment. Various parallel programming frameworks using multicore CPUs such as OpenMP and PPL have been announced. Nvidia and AMD have developed parallel programming platforms and APIs for program developers to take advantage of multicore GPUs on their graphics cards. In this paper, we develop digital image transformation programs that runs on each of the major parallel programming frameworks, and measure the execution time. We analyze the characteristics of each framework through the execution time comparison. Also a constant K indicating the ratio of program execution time between different parallel computing environments is presented. Using this, it is possible to predict rough execution time without implementing a parallel program.

BioAPI 표준적합성 시험 준비를 위한 가이드라인

신우창 서경대학교 산업기술연구소 2011 産業技術硏究所論文集 Vol.26 No.-

Biometric technology such as fingerprint or facial recognition is becoming increasingly utilized. And many biometric technology products are readily available on the market. Therefore it is necessary to test whether these products are conformable to the BioAPI international standard specification. This paper describes the method and procedure of the BioAPI conformance testing, in order to help BioAPI product suppliers to prepare the conformance testing.

저작도구를 이용한 수학 학습시스템 개발

신우창,김갑수 한국정보교육학회 2007 정보교육학회논문지 Vol.11 No.2

우리는 현재 정보화 시대에 살고 있다. 컴퓨터 테크놀로지의 도움으로 사회의 생산성과 효율성 그리고 편리성이 증진되었다. 교육에 있어서도 이러한 정보기술의 도움을 받고 있으나, 아직까지 학교 교육에서 가장 널리 사용되는 도구가 여전히 칠판과 교과서인 점을 생각해 볼 때 정보공학이 교육 분야에서 제대로 활용되지 못한 점을 느낄 수 있다. 본 논문에서는 수학교육을 위한 학습시스템을 제안한다. 제안된 학습시스템은 저작도구를 이용하여 수학교육 콘텐츠를 초․중고등학교 교사들이 손쉽게 작성할 수 있으며, 이를 수업에 활용할 수 있다. 작성된 수학교육 콘텐츠를 데이터베이스로 축척하여 그 활용성을 높인다. It is information age now. Computer technology increases productivity, efficiency, and convenience of the public. Even if the computer-aided mathematics education is very important, so far there is the meager level of applying computers to mathematics education. This paper proposes a learning system with authoring tool for mathematics education. Teachers make study-contents easily with the system, and use them on a class. The content database that stores study-contents extends the usability of the system.

소프트웨어 설계패턴 정형화에 관한 연구

신우창 서경대학교 산업기술연구소 2006 産業技術硏究所論文集 Vol.17 No.-

Design patterns are descriptions of communicating objects and classes that are customized to solve a recurring design problem. They clarify the subject of reuse of software designs. Patterns represent the distilled experience of experts, and make it possible to share their expert insight and knowledge. They also upgrade the communication among developers from a code level to a higher abstract level. However, most design patterns are currently specified with informal text and examples, and tool support for patterns is not generalized. To use all of the benefits of patterns, a formal specification along with tool support is indispensable. In this paper, we propose a Formalized Solution(FS) model as a mathematical basis for formalizing design patterns, and suggest a Design Pattern Specification Language(DPSL) that is a specification language for design patterns.

막걸리의 기능성 (Korean Paradox)

신우창 한국식품영양학회 2011 한국식품영양학회 학술대회논문집(학술심포지움) Vol.2011 No.06

A Study on the Measurement of Respiratory Rate Using a Respirator Equipped with an Air Pressure Sensor

신우창 한국인터넷방송통신학회 2022 International journal of advanced smart convergenc Vol.11 No.4

In order to measure the respiratory rate, one of the major vital signs, many devices have been developed and related studies have been conducted. In particular, as the number of wearers of respirators increases in the COVID-19 pandemic situation, studies have been conducted to measure the respiratory rate of the wearer by attaching an electronic sensor to the respirator, but most of them are cases in which an air flow sensor or a microphone sensor is used. In this study, we design and develop a system that measures the respiratory rate of the wearer using an air pressure sensor in a respirator. Air pressure sensors are inexpensive and consume less power than the other sensors. In addition, since the amount of data required for calculation is small and the algorithm is simple, it is suitable for small-scale and low-power processing devices such as Arduino. We developed an algorithm to measure the respiratory rate of a respirator wearer by analysing air pressure change patterns. In addition, variables that can affect air pressure changes were selected, and experimental scenarios were designed according to the variables. According to the designed scenario, we collected air pressure data while the respirator wearer was breathing. The performance of the developed system was evaluated using the collected data.