• 로봇학회논문지
• /
• 제19권1호
• /
• pp.65-70
• /
• 2024

Tool wear is considered an important issue in manufacturing and engineering, as worn tools can negatively impact productivity and product quality. Given that the wear status of tools plays a decisive role in the production process, measuring tool wear is a key task. Consequently, there is significant attention in manufacturing fields on the precise measurement of tool wear. Current domestic methods for measuring wear are limited in terms of speed and efficiency, with traditional methods being time-consuming and reliant on subjective evaluation. To address these issues, we developed a measurement module implementing the DeepContour algorithm, which uses image processing technology for rapid measurement and evaluation of tool wear. This algorithm accurately extracts the tool's outline, assesses its condition, determines the degree of wear, and proves more efficient than existing, subjective, and time-consuming methods. The main objective of this paper is to design and apply in practice an algorithm and measurement module that can measure and evaluate tool wear using image processing technology. It focuses on determining the degree of wear by extracting the tool's outline, assessing its condition, and presenting the measured value to the operator.

• 대한산업공학회지
• /
• 제13권1호
• /
• pp.61-67
• /
• 1987

A tool for optimizing simulated discrete variable stochastic systems, SIMICOM was developed and presented in [5]. In this paper an evaluation of its performance and results of comparisons with other popular methods for dealing with simulation-optimization problems will be provided. Based on several test problems it is concluded that SIMICOM dominates those methods.

• 간호행정학회지
• /
• 제9권3호
• /
• pp.495-505
• /
• 2003

Purpose: The purpose of this study was to develop 360 feedback for nursing unit manager based on the current personnel evaluation system and to evaluate the new tool according to evaluation subjects. Total of 277 subjects of nurse unit managers and staff nurses were participated in this study. Method: The study was conducted in three phases each for development, application, and analysis of 360 feedback. SAS program was utilized for data analysis with descriptive statistics, t-test, and analysis of variance. Result: The evaluation criteria of the developed 360 feedback tool consisted of 13 subscales such as professional knowledge, apprehension & judgement, job performance, applicability, creativity, leadership, responsibility, promptness & accuracy, administrative ability & sense of mission, activeness, cooperation, communicability, and general attitude. The internal consistency of the tool was Cronbach's alpha .939. The evaluation score by! peers(M=4.30) was the highest one, followed by self-evaluation(M=4.23), evaluation by supervisor(M=4.17), and evaluation by subordinate(M=4.10). The differences in the total evaluation scores among the subjects supervisor, self, peer, and subordinate were not statistically significant, but significant differences were found in some subscales scores. Conclusion: Further research is required to test the reliability and validity of the $360^{\circ}$ feedback tool, and to test the outcome and the process of $360^{\circ}$ feedback system.

• 임상간호연구
• /
• 제14권1호
• /
• pp.71-84
• /
• 2008

Purpose: The purpose of this study was to develop a performance tool to evaluate operating room nurses. Method: In the first stage, 59 preliminary items were selected after two focus group meetings were carried out using as background a reference review. At this stage 59 items were developed. Next, the selected preliminary items were modified by an expert group of nurses with over 10 years experience, nurses holding doctoral degrees and professors in nursing. In the third and fourth stage, these items were analyzed by the expert group to determine validity and tested by hospital nurses with over 10 years experience to determine reliability Results: For the final tool, the 59 items, 47 items for the performance evaluation dimension and 12 items for the competence evaluation dimension were found to be valid and reliable. Cronbach's $\alpha$ was .9622, a promising alpha value for the total instrument. Conclusion: This tool is an efficient performance evaluation instrument providing meaningful feedback for operating room nurses.

• 한국공작기계학회논문집
• /
• 제11권5호
• /
• pp.93-99
• /
• 2002

In general, manufacturing error is originated from bad material, machine tool defection and tool breakage. When the manufacturing process is stable, the most of error come from the tool wear. In common on-machine measurement teaching probe and touch sensor are widely used however in this paper the electric touch point type automatic tool compensation system is developed the performance of it is validated and effective operating is proposed.

• 재활치료과학
• /
• 제11권4호
• /
• pp.41-53
• /
• 2022

목적 : 본 연구는 정신장애인의 직업재활 평가도구를 확인하고 분석함으로써 작업치료 영역에서 임상적으로 유용하게 활용할 수 있는 정신장애인 직업재활 평가도구의 개발을 위한 기초자료로 활용하는 것이다. 연구방법 : 문헌 검색은 Pubmed 데이터베이스를 사용하였으며, 분석 내용은 개발연도, 평가방식, 문항 수, 척도, 평가 문항을 분석하였다. 분석 방법은 각 평가 항목을 기능, 내적요인, 환경, 정신증상의 4가지 범주로 구분하여 각 평가도구의 평가 요소에 대해 파악하였다. 결과 : 검색어를 통한 Pubmed 검색 시 161개의 문헌이 검색되었고, 선정 방법에 따라 Griffiths Work Behavior Scale (GWBS), Occupational Functioning Scale (OFS), Social and Occupational Functioning Assessment Scale (SOFAS), Work Ability Index (WAI), Work Behaviour Inventory (WBI), Work Environment Impact Scale (WEIS), Work and Social Adjustment Scale (WSAS)의 7개 평가도구가 선별되었다. 모든 평가도구의 평가항목은 직무와 관련된 기능평가를 포함하였으며, 각 평가도구의 목적에 따라 내적요인, 환경, 정신증상에 대한 측정이 이루어지는 것으로 나타났다. 결론 : 직업 기술은 신체, 인지, 사회기술, 대처능력 등 다양한 기능이 복합적으로 작용하는 기술이다. 따라서 본 연구에서 분석한 기능, 내적요인, 환경, 정신증상의 4가지 요소가 포함될 필요가 있으며, 평가과정에서 발생하는 물리적 제약을 보완하기 위해 ICT 융합 평가도구의 개발함으로써 보다 효율적인 정신장애인 직업재활 평가가 이루어져야 할 것이다.

• 기본간호학회지
• /
• 제17권4호
• /
• pp.487-497
• /
• 2010

Purpose: This study examined the validity and reliability to develop a lifestyle evaluation tool for metabolic syndrome patients. Methods: A methodological research design was used. The construct factors and preliminary items were identified by reviewing previous researches and tools related to lifestyle and reviewed by ten experts. It was tested with 195 patients with metabolic syndrome in a university hospital. The data were analyzed with SPSS/WIN 14.0. Results: To test the validity, principal component analyses were used and resulted in the extraction of six components. The convergent validity resulted r= .72 (p<.001) with Health Promotion Lifestyle Profile. The discriminant validity with Center for Epidemiologic Studies Depression Scale resulted r= -.15 (p=.004). The Internal consistency of the tool had an Cronbach's a of .92. The self-report format Lifestyle Evaluation Tool for the patients with metabolic syndrome was developed with 36 items and four-rating scales:'physical activity and weight control' eight items, 'dietary habits' sixteen items, 'drinking and smoking' three items, 'sleep and rest' two items, 'stress' three items, 'drug and health management' four items. Conclusion: This Tool will evaluate health behaviors in patients with metabolic syndrome. Also, it will contribute to the development of nursing intervention to improve the metabolic syndrome patients' lifestyle.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2001년도 춘계학술대회 논문집
• /
• pp.84-87
• /
• 2001

The high speed machining which cam improve the production and quality has been remarkable in die/mold industry with the growth of parts and materials industries. The speed of machine tool increases, but on the other hand, the response of sensors I not being improved. Therefore, the condition monitoring techniques for the machine too, tool and workpiece in high speed machining are incomplete. In this study, characteristics of the tool edge roughness were verified from the high frequency components of cutting force signals acquired by the high speed dynamometer. Also, the experimental evaluation technique for the machinability and condition monitoring in high speed machining was established by analyzing the cutting force, acceleration and surface roughness.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2006년도 춘계학술대회 논문집
• /
• pp.13-14
• /
• 2006

The quality of tool material is very important factor in machining evaluation. The characteristics of tungsten carbide, such as grain size and hardness, and density are depending on the variation of Co composition and WC size. In this study, the non-coated end mill which is made of ultra-fine tungsten carbide is investigated by measuring tool wear and tool lift test. The machining test is conducted with high hardened workpiece under high-speed cutting condition.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2002년도 추계학술대회 논문집
• /
• pp.16-21
• /
• 2002

The high speed machining center(HMC) has been widely applied to manufacture a die and trial product in many machine industry. Because the evaluation fer the HMC is not sufficiently performed and the efficient cutting conditions aren't selected, a great loss has been caused in the cost aspect. In this study, the need of preliminary running time and unstable spindle speed is presented from the analysis of acceleration in idling. The Machinability fur the TiAlN coated flat end mill and STD11( $H_{R}$C60) is evaluated from the trends of tool wear and cutting force according to cutting conditions and slenderness ratio and a low response of tool dynamometer in high speed is proved. The resonance spindle speed is identified through the tool wear and natural frequency test.t.