• Clinical and Experimental Pediatrics
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• 제60권11호
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• pp.353-358
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• 2017

Purpose: To develop and evaluate a simple screening tool to assess hearing loss in newborns. A derived score was compared with the standard clinical practice tool. Methods: This cohort study was designed to screen the hearing of newborns using transiently evoked otoacoustic emission and auditory brain stem response, and to determine the risk factors associated with hearing loss of newborns in 3 tertiary hospitals in Northern Thailand. Data were prospectively collected from November 1, 2010 to May 31, 2012. To develop the risk score, clinical-risk indicators were measured by Poisson risk regression. The regression coefficients were transformed into item scores dividing each regression-coefficient with the smallest coefficient in the model, rounding the number to its nearest integer, and adding up to a total score. Results: Five clinical risk factors (Craniofacial anomaly, Ototoxicity, Birth weight, family history [Relative] of congenital sensorineural hearing loss, and Apgar score) were included in our COBRA score. The screening tool detected, by area under the receiver operating characteristic curve, more than 80% of existing hearing loss. The positive-likelihood ratio of hearing loss in patients with scores of 4, 6, and 8 were 25.21 (95% confidence interval [CI], 14.69-43.26), 58.52 (95% CI, 36.26-94.44), and 51.56 (95% CI, 33.74-78.82), respectively. This result was similar to the standard tool (The Joint Committee on Infant Hearing) of 26.72 (95% CI, 20.59-34.66). Conclusion: A simple screening tool of five predictors provides good prediction indices for newborn hearing loss, which may motivate parents to bring children for further appropriate testing and investigations.

• 산업경영시스템학회지
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• 제43권4호
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• pp.161-167
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• 2020

In the process of cutting large aircraft parts, the tool may be abnormally worn or damaged due to various factors such as mechanical vibration, disturbances such as chips, and physical properties of the workpiece, which may result in deterioration of the surface quality of the workpiece. Because workpieces used for large aircrafts parts are expensive and require strict processing quality, a maintenance plan is required to minimize the deterioration of the workpiece quality that can be caused by unexpected abnormalities of the tool and take maintenance measures at an earlier stage that does not adversely affect the machining. In this paper, we propose a method to indirectly monitor the tool condition that can affect the machining quality of large aircraft parts through real-time monitoring of the current signal applied to the spindle motor during machining by comparing whether the monitored current shows an abnormal pattern during actual machining by using this as a reference pattern. First, 30 types of tools are used for machining large aircraft parts, and three tools with relatively frequent breakages among these tools were selected as monitoring targets by reflecting the opinions of processing experts in the field. Second, when creating the CNC machining program, the M code, which is a CNC auxiliary function, is inserted at the starting and ending positions of the tool to be monitored using the editing tool, so that monitoring start and end times can be notified. Third, the monitoring program was run with the M code signal notified from the CNC controller by using the DAQ (Data Acquisition) device, and the machine learning algorithms for detecting abnormality of the current signal received in real time could be used to determine whether there was an abnormality. Fourth, through the implementation of the prototype system, the feasibility of the method proposed in this paper was shown and verified through an actual example.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 춘계학술대회 논문집
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• pp.675-681
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• 2002

Parametric modeling and configuration design method are a important methods for rapid design in manufacturing. This paper proposes a relation rules which parametrically models a bonnet trimming tool based on Pro/Engineer. The concept of desogn is applied a trimming die of the bonnet outer panel. Trimming die have a many parameters. Each a parameter is related the die face and punch profile. A design system consists of a Pro/Engineer, a Pro/program.

• 산업기술연구
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• 제26권B호
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• pp.215-220
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• 2006

Effective use of debugging in computer science education is a topic that has received little attention. Existing tools either are too overwhelming for the novice or are too basic and inflexible. Furthermore, the integration of the debugger into complex IDEs have unfamiliar debuggers from students, resulting in a harmful proliferation of console I/O. In this paper, a new stand-alone educational debugging tool is presented, with simple but powerful tools for easily observing and modifying program execution state. This tool is analyzed from an user perspective, and is compared with existing tools.

• 산업경영시스템학회지
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• 제8권12호
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• pp.119-125
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• 1985

It is very important to assure the software quality. The static and dynamic testing are to be performed on the program to find some error in it, and it's purposes are to assure the software quality with cost-effectiveness. For it we use the automated tool. In this paper, it suggest the design of the software tool for COBOL static testing.

• 대한기계학회논문집A
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• 제29권2호
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• pp.333-340
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• 2005

Feedrate is one of the factors that have the significant effects on the productivity, qualify and tool life in the cutting mechanism as well as cutting velocity, depth of cut and width of cut. In this study, in order to realize the high-efficient machining, a new feedrate optimization method is proposed based on the concept that the optimum feedrate can be derived from the allowable cutting power since the cutting power can be predicted from the cutting parameters as feedrate, depth of cut, width of cut, chip thickness, engagement angle, rake angle, specific cutting force and so on. Tool paths are extracted from the original NC program via the reverse post-processing process and converted into the infinitesimal tool paths via the interpolation process. And the novel NC program is reconstructed by optimizing the feedrate of infinitesimal tool paths. Especially, the fast feedrate optimization is realized by using the Boolean operation based on the Goldfeather CSG rendering algorithm, and the simulation results reveal the availability of the proposed optimization method dramatically reducing the cutting time and/or the optimization time. As a result, the proposed optimization method will go far toward improving the productivity and qualify.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.143-147
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• 2009

Graduates from engineering colleges are demanded to have been acquired some abilities and qualities during their undergraduate years through the standard of the so-called "programmed learning results and evaluation" This paper aims at analyzing the learning results evaluation tool for graduates from the architectural engineering department through the examples of the colleges with engineering accreditation in Korea, and suggesting a more appropriate programmed learning result evaluation tool. The basic theories on programmed learning results were studied, and then the previous study examples were researched. The study objects were limited to the fourteen colleges which offered the examples of the learning results evaluation tools of the colleges with engineering accreditation in Korea. Types and the present situation of those evaluation tools were analyzed. In addition, the proposals for the evaluation tool of programmed learning results and the performance standard were suggested for those with an engineering accreditation, based on the case study of the performance standards of each college with an engineering accreditation. The study results showed that much more national research needs to be conducted to clarify the standards of selecting an evaluation tool and a performance standard appropriate for the level of each college so that it can make a proper proposal.

• 한국산학기술학회논문지
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• 제19권7호
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• pp.183-191
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• 2018

본 논문에서는 공학교육인증제를 운영하는 정보보호학 프로그램에서 교과 기반의 학습성과 평가 체계를 활용하여 프로그램의 재학생들이 졸업 시점에 갖추어야 하는 핵심 성과인 프로그램 학습 성과에 대한 달성도를 평가하는 방안을 제안한다. 본 논문의 교과 기반 학습 성과 평가 사례에서는 프로그램의 교육 목표에 부합하는 프로그램 학습 성과를 설정하고, 교과 기반 평가 자료를 포함한 직간접 평가 도구를 이용하여 프로그램 학습 성과 평가 체계를 기술한다. 그리고 교과기반 프로그램 학습 성과 평가를 위한 루브릭 및 평가 절차, 수행 준거의 설정, 이수 체계에 따른 프로그램 학습 성과에 대한 기여도가 높은 탐침(Probe) 교과목의 선정, 탐침 교과목에 대한 교과목 학습 목표의 설정 및 성취 수준을 측정하기 위한 평가 도구별 루브릭을 설명한다. 이어 탐침 교과목의 학습목표별 필기시험 및 프로젝트 평가 도구의 문항을 기초로 교과기반 학습 성과 평가를 수행하고, 평가 결과로부터 성취도 수준의 분석과 개선 사항 도출하는 과정을 보임으로써 제안하는 교과 기반 학습 성과 평가 방안의 효용성을 입증한다.

• 인터넷정보학회논문지
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• 제6권6호
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• pp.71-83
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• 2005

본 논문에서는 분산시스템 상의 클라이언트로부터 요청되는 객체 자원들에 대한 그룹관리 및 동적 바인딩을 지원하는 분산객체그룹 프레임워크 기반에서 편리하게 분산응용 프로그램을 작성할 수 있는 분산 프로그래밍 도구(Distributed Programming Developing Tool: DPDT)를 개발했다. 분산객체그룹 프레임워크는 서버객체에 대한 그룹등록/철회, 접근권한, 이름과 속성서비스 등의 그룹관리 서비스와 동적 바인딩, 중복객체 지원, 부하 균형화 및 분산응용 간의 연동 등의 분산응용 지원 서비스를 제공한다. 분산응용의 개발 시 본 툴을 이용하여, 서버 프로그램 개발자는 해당 서버시스템 상에서 객체들을 구현하고 객체그룹에 서비스 제공에 필요한 속성정보를 등록하며, 클라이언트 프로그램 개발자도 이들 객체 또는 객체그룹에 대한 접근권한을 받아 허가된 객체들의 속성정보를 사용하여 클라이언트 프로그램을 작성할 수 있다. 이를 위해 본 논문에서는 객체그룹에 대한 정의와 본 툴이 지원하는 분산객체그룹 프레임워크의 구조와 기능들을 살펴보고, 분산객체그룹 프레임워크와 분산응용 간의 편리한 인터페이스를 제공할 수 있도록 구현한 DPDT의 3개의 GUI 환경들에 대해 기술하였다. 마지막으로 DPDT를 사용하여, 서버 프로그램으로 구현된 객체들의 그룹등록/철회, 접근권한 부여 및 클라이언트 프로그램의 작성과정과 개발된 분산응용의 수행결과를 보였다.

• 한국정밀공학회지
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• 제7권3호
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• pp.56-65
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• 1990

This paper describes a computer aided tool design system of deep drawing of cylindrical cups with or without flange by press. An approach to system is based on knowledge based system. The computer program has written in basic language with personal computer Knowledges for tool design are formulated from the plasticity theory, handbooks, experimental results and empirical knowhow of the field experts. The capabilities of developed system include 1) the selection of tool structure (with or without blank holder, single or double action, lift up or draw off type), 2) the design of tool elements(punch/holder, die/holder etc.) for the previous selected tool structure by the process planning output and the production quantity. The final output is generated in graphics form for design sheet.