• ETRI Journal
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• 제36권4호
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• pp.617-624
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• 2014

Through-silicon via (TSV) technology provides much of the benefits seen in advanced packaging, such as three-dimensional integrated circuits and 3D packaging, with shorter interconnection paths for homo- and heterogeneous device integration. In TSV, a destructive cross-sectional analysis of an image from a scanning electron microscope is the most frequently used method for quality control purposes. We propose a quantitative evaluation method for TSV etch profiles whereby we consider sidewall angle, curvature profile, undercut, and scallop. A weighted sum of the four evaluated parameters, nominally total score (TS), is suggested for the numerical evaluation of an individual TSV profile. Uniformity, defined by the ratio of the standard deviation and average of the parameters that comprise TS, is suggested for the evaluation of wafer-to-wafer variation in volume manufacturing.

• 한국정밀공학회지
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• 제22권4호
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• pp.159-166
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• 2005

This study deals with the correction of gear tooth profile error by finish roll forming. First, we experimentally confirmed that the tooth profile error is a synthesis of the concave error and the pressure angle error. Since various types of tooth profile errors appear in the experiments, we introduced evaluation parameters for rolling gears to objectively evaluate profile quality. Using these evaluation parameters, we clarified the relationship among the tooth profile error, the addendum modification factor (A. M. factor), and the tool loading force. We verified the character of concave error, pressure angle error, tool loading force and number of cycles of finish roll forming by using a forced displacement method. This study makes clear that tool loading force and number of cycles of finish roll forming are very important factors that affect involute tooth profile error. The results of the experiment and analysis show that the proposed method reduces concave and pressure angle errors.

• 인터넷정보학회논문지
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• 제3권3호
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• pp.19-29
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• 2002

현재 웹-기반 원격 교육에서의 사이버 평가 시스템들은 학생 개인의 특성과 성향을 고려하지 않고 있다. 특히, 문제 출제방식에서 기존의 전체 학생을 대상으로 한 단순하고 일반적인 출제방식을 사용하고 있다. 본 논문에서는 사용자 프로파일을 이용한 효율적인 사이버 평가 시스템을 제안한다. 먼저, 기존의 평가 시스템에서 소홀히 다루었던 학생 개인의 특성과 성향에 대한 사용자 프로파일을 이용하여 문제를 필터링 한 후, 문제를 출제하도록 함으로써, 시스템의 효율성을 높이고 학생들의 공부에 대한 관심과 능력에 따라 좋은 결과를 얻도록 하였다. 사용자 프로파일을 적용할 때에는 카테고리 기반 방식과 키워드 기반 방식을 합성한 문제출제 방식을 적용함으로써 문제에 대한 관심과 흥미를 유발하도록 하였다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.288-293
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• 2005

A earn profile grinding machine is a mandatory machine tool for manufacture of high precision contoured cam. Experimental evaluation of modal analysis is an effective tool to investigate dynamic behavior of a machine. This paper presents the measurement system and experimental investigation on the modal analysis of a grinding machine. The weak part of the machine is found by the experimental evaluation. The results provide structure modification data for good dynamic behaviors. And safety of the machine was confirmed by the modal analysis of modified machine design. Finally, the cam profile grinding machine was successfully developed.

• Asian-Australasian Journal of Animal Sciences
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• 제29권7호
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• pp.1029-1036
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• 2016

This study investigated the degree to which instrumental measurements explain the variation in pork loin tenderness as assessed by the sensory evaluation of trained panelists. Warner-Bratzler shear force (WBS) had a significant relationship with the sensory tenderness variables, such as softness, initial tenderness, chewiness, and rate of breakdown. In a regression analysis, WBS could account variations in these sensory variables, though only to a limited proportion of variation. On the other hand, three parameters from texture profile analysis (TPA)-hardness, gumminess, and chewiness-were significantly correlated with all sensory evaluation variables. In particular, from the result of stepwise regression analysis, TPA hardness alone explained over 15% of variation in all sensory evaluation variables, with the exception of perceptible residue. Based on these results, TPA analysis was found to be better than WBS measurement, with the TPA parameter hardness likely to prove particularly useful, in terms of predicting pork loin tenderness as rated by trained panelists. However, sensory evaluation should be conducted to investigate practical pork tenderness perceived by consumer, because both instrumental measurements could explain only a small portion (less than 20%) of the variability in sensory evaluation.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.212-218
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• 2004

The purpose of this study was to quantify the amount of remaining gutta-percha/sealer on the walls of root canals when three types of nickel-titanium rotary instruments (Profile. ProTaper and $K^3$) and a hand instrument(Hedstrom file) used to remove these materials. The results of this study were as follows: 1. In the total time for gutta-percha removal. Profile group was the fastest and followed by $K^3$, Protaper, Hedstrom file group. 2. In case of the evaluation of the volume of remained gutta-percha from radiograph. $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. 3. In case of the evaluation of the volume of gutta-percha remained from stereomicroscope, $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. These results showed that instrumentation using nickel-titanium rotary instrument groups was faster than that using hand instrument group. The effect of gutta-percha removal using Profile group was better than that using Protaper and $K^3$ group in the nickel-titanium rotary instrument groups.

• 한국지반공학회논문집
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• 제35권2호
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• pp.29-36
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• 2019

본 연구에서는 필댐 사력부 전단파 속도 주상도 결정시 물성치 변동성에 의해 발생 가능한 불확실성을 평가하고, 평가된 불확실성이 반영된 국내 필댐 사력부를 위한 전단파 속도 주상도 모델을 제안하였다. 이를 위하여 평가된 불확실성을 바탕으로 국내 필댐 사력부에 존재 가능한 깊이-전단파 속도 곡선 400개를 결정하고, 이에 대한 통계분석을 통하여 깊이별 전단파 속도 상한과 하한 곡선을 결정하였다. 결정된 곡선을 바탕으로 Burger 모델 형태의 깊이별 전단파 속도 상한과 하한 주상도 모델을 결정하였다. 결정된 모델은 국내에서 많이 사용되고 있는 Sawada-Takahashi 모델과 비교하였다.

• 한국CDE학회논문집
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• 제15권3호
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• pp.222-233
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• 2010

Developed in this research is a TP (tangible prototyping) system, which consists of two modules; (1) a virtual reality model to evaluate the functions and appearance of the product, and (2) a haptic device to emulate tactile and kinesthetic properties of mechanical dial knobs. As an example, a washing machine is modeled using a commercial CAD system and transformed in VRML and X3D formats. Some dynamic behaviors and kinematic characteristics are programmed using X3D script and Java. Various haptic behaviors of the dial are generated by modulating torque profile according to the rotation angle. A torque profile measuring system is developed to evaluate the behaviors of the haptic dial physically. Haptic sensibility evaluations are accomplished using the TP by semantic differential method.

• 융합보안논문지
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• 제3권2호
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• pp.57-65
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• 2003

보호프로파일은(Protection Profile)은 특정형태의 제품군이 지녀야 할 보안 목적을 사용자 그룹에서 요구한 명세서이며 보호프로파일의 가정사항은 TOE(Target Of Evaluation)의 물리적, 인적, 네트워크적 관점을 포함하는 사용 환경과 TOE의 사용제한, 잠재적인 자산 가치, 추가적인 적용의 관점을 포함하는 TOE 사용 방법상의 내용을 기술한 것이다. 본 논문에서는 NSA(National Security Agency) 침입탐지 시스템 보호프로파일과 국가기관용 침입탐지 시스템 보호프로파일의 가정사항 항목을 비교 분석하였다.

• 한국광학회:학술대회논문집
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• 한국광학회 2009년도 창립 20주년기념 특별학술발표회
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• pp.280-281
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• 2009