• Title/Summary/Keyword: improvement of test tool

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A Study on the Developmental Tools of Performance Task for Information Literacy Instruction (정보활용교육을 위한 수행과제 개발 도구에 관한 연구)

  • Lee, Byeong-Ki
    • Journal of Korean Library and Information Science Society
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    • v.42 no.4
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    • pp.31-50
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    • 2011
  • In education, evaluation is an important element because instructor can judge the growth and development of students, it has been to bring about quality improvement in education. Performance assessment has emerged to overcome traditional evaluation such as paper test, multiple choice test. Performance assessment is an approach to measuring a student's status based on the way the student completes a specified task. Information literacy instruction is aimed at cultivating information literacy. Performance assessment suitable for measurement to status of Information literacy. In order to performance assessment, task should have the first. However, instructor is difficult to develop a good performance task to meet the assessment needs. Therefore, this research aims at suggesting the developmental tool of performance task applicable to Information literacy instruction. The proposed tool is a template type, consists of 4 steps, educational goals and learning objectives, knowledge and capabilities, task types, measurement and scoring criteria.

Protein subcellular localization classification from multiple subsets of amino acid pair compositions

  • Tung, Thai Quang;Lim, Jong-Tae;Lee, Kwang-Hyung;Lee, Do-Heon
    • Proceedings of the Korean Society for Bioinformatics Conference
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    • 2004.11a
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    • pp.101-106
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    • 2004
  • Subcellular localization is a key functional char acteristic of proteins. With the number of sequences entering databanks rapidly increasing, the importance of developing a powerful tool to identify protein subcellular location has become self-evident. In this paper, we introduce a novel method for predic ting protein subcellular locations from protein sequences. The main idea was motivated from the observation that amino acid pair composition data is redundant. By classifying from multiple feature subsets and using many kinds of amino acid pair composition s, we forced the classifiers to make uncorrelated errors. Therefore when we combined the predictors using a voting scheme, the prediction accuracy c ould be improved. Experiment was conducted on several data sets and significant improvement has been achieve d in a jackknife test.

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Separation of Superimposed Pulse-Echo Signal for Improvement of Resolution of Scanning Acoustic Microscope -Deconvolution Technique Combined with Wavelet Transform- (초음파 주사 현미경의 분해능 향상을 위한 중첩된 펄스에코 신호의 분리 기법(디컨볼루션과 웨이브렛 변환의 혼합기법))

  • 장경영;장효성;박병일
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.7
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    • pp.217-225
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    • 2000
  • Scanning Acoustic Microscope (SAM) is used as an important nondestructive test tool in semiconductor reliability evaluation and failure analysis. However, inspections of chip attach adhesive interface fer thin chip has proven difficulty as the reflected signals from the chip top and bottom are superimposed. In this paper, in order to overcome this difficulty, a new signal processing method based on the deconvolution technique combined with the wavelet transform is proposed. The wavelet transform complements a disability of deconvolution technique of which performance largely decreases when the waveform of target signal is not identical to that of reference signal. Performances of the proposed method are demonstrated by through computer simulations using model signal and experiments for the fabricated semiconductor samples, and satisfactory results are obtained.

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A Study on Google Classroom as a Tool for the Development of the Learning Model of College English

  • Lee, Jeong-Hwa;Cha, Kyung-Whan
    • International Journal of Contents
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    • v.17 no.2
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    • pp.65-76
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    • 2021
  • The aim of this study was to explore the use of Google Classroom as a learning management system for College English. The study targeted 34 university students. They took part in various activities, such as writing reactions to video lectures, peer-editing essays, and recording video presentations, et cetera. For the study, a t-test was conducted to evaluate the English development of the students. The two essays that each student wrote were used as the data sources. The result (t=-5.854, p=.000) indicated an improvement in their English writing proficiency. In addition, a survey was conducted to gather students' feedback regarding their perceptions towards the course. The study covered five aspects of their experience: Google Classroom, language development, Quizlet, classroom experience, and essay-writing experience. From the results, students indicated a positive response to the program. The use of Google Classroom in an online learning setting accomplishes two things; it helped the students in the development of their English proficiency, and provided activities that students find interesting, which in turn stimulates their self-learning spirit.

Improvement of Continuation Power Flow System Applying the Optimal Load Shedding Algorithm (최적 부하절체 알고리듬을 적용한 연속조류계산의 향상)

  • Song, Hwa-Chang;Lee, Byong-Jun;Kwon, Sae-Hyuk
    • Proceedings of the KIEE Conference
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    • 1998.07c
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    • pp.899-901
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    • 1998
  • Continuation power flow is a tool that can trace the path of the solution from the base stable solution. However, the base stable solution cannot be calculated when the initial system load is too large to operate at a stable operating point. This case is called as unsolvable case. This paper presents implementation of the optimal load shedding algorithm on continuation power flow. It performs steady-state analysis of power systems at unsolvable case that can occur in contingency analysis. Numerical simulation on 20-bus test system demonstrates that the continuation power flow applying the optimal load shedding algorithm is robust at solvable and unsolvable cases.

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Performance Evaluation of Biozentech Malaria Scanner in Plasmodium knowlesi and P. falciparum as a New Diagnostic Tool

  • Firdaus, Egy Rahman;Park, Ji-Hoon;Muh, Fauzi;Lee, Seong-Kyun;Han, Jin-Hee;Lim, Chae-Seung;Na, Sung-Hun;Park, Won Sun;Park, Jeong-Hyun;Han, Eun-Taek
    • Parasites, Hosts and Diseases
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    • v.59 no.2
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    • pp.113-119
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    • 2021
  • The computer vision diagnostic approach currently generates several malaria diagnostic tools. It enhances the accessible and straightforward diagnostics that necessary for clinics and health centers in malaria-endemic areas. A new computer malaria diagnostics tool called the malaria scanner was used to investigate living malaria parasites with easy sample preparation, fast and user-friendly. The cultured Plasmodium parasites were used to confirm the sensitivity of this technique then compared to fluorescence-activated cell sorting (FACS) analysis and light microscopic examination. The measured percentage of parasitemia by the malaria scanner revealed higher precision than microscopy and was similar to FACS. The coefficients of variation of this technique were 1.2-6.7% for Plasmodium knowlesi and 0.3-4.8% for P. falciparum. It allowed determining parasitemia levels of 0.1% or higher, with coefficient of variation smaller than 10%. In terms of the precision range of parasitemia, both high and low ranges showed similar precision results. Pearson's correlation test was used to evaluate the correlation data coming from all methods. A strong correlation of measured parasitemia (r2=0.99, P<0.05) was observed between each method. The parasitemia analysis using this new diagnostic tool needs technical improvement, particularly in the differentiation of malaria species.

A Study on the Measurement for Straightness and Orhogonality Using CT Method (CT 법을 이용한 진직도 및 직각도 측정에 관한 연구)

  • 이승수;김민주;박정보;전언찬
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.11 no.1
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    • pp.83-90
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    • 2002
  • As high-precision parts are needed with manufacturing techniques improved. the demand of high-precision machine tools has been increasing They are made to developed the precision measuring skill to maintenance the accuracy of themselves as a matter or course We one paper measured straightness and orthogonality of the square to verify that it is possible for CT(circular test) method by 2-dimensional probe and the square to measure orthogonality Furthemore we compared the result of the study with the computer simulation's to prove its possibility and made an improvement of measuring method.

Motion Characteristic Evaluation of Sliding Cover for High Speed Type Machine (Sliding cover의 고속 운동 특성 평가)

  • 강재훈;송준엽;박화영;이승우;황주호;이현용;이찬홍;이후상
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.446-449
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    • 2002
  • Recently, advanced manufacturing system with high speed and intelligent have been developed for the betterment of machining ability. In this case, reliability prediction work with motion characteristic evaluation of sliding cover has also important roll from design procedure to manufacturing and assembly process. Accordingly in this study, H/W test -bed system for reliability evaluation of sliding cover has been developed to obtain proper reference data for design of new model, and also prevention trouble, quality and life cycle improvement extremely for advanced mother machinary.

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DEM Estimation Using Two Stage Stereo Matching Method (2단계 스테레오 정합기법을 이용한 DEM 추정)

  • Nam, Chang-Woo;Woo, Dong-Min
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.49 no.12
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    • pp.659-666
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    • 2000
  • A stereo matching has been an important tool for reconstructing three dimensional terrain. By using stereo matching technique, DEM(Digital Elevaton Map) can be generated by the disparity from a reference image to a target image. Generally disparity map can be evaluated by matching the reference image to the target image and if the role of the reference and the target are interchanged, a different DEM can be obtained. In this paper, we propose a new fusion technique to estimate the optimal DEM by eliminating the false DEM due to occlusion. To detect the false DEM, we utilize two measure of accuracy: self-consistency and cross-correlation score. We test the effectiveness of the proposed methods with a quantitative analysis using simulated images. Experimental result indicate that the proposed methods show 24.4% and 33.1% improvement over either DEM.

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Analysis and Improvement of Interior Noise in a Passenger Car using Taguchi Orthogonal Array (다구찌 직교배열을 이용한 승용차의 실내소음 분석 및 개선)

  • 김명업;이두호
    • Journal of KSNVE
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    • v.9 no.5
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    • pp.998-1004
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    • 1999
  • The passenger car manufacturer should meet more and more strict requirements of customers on noise and vibration problems. It is proven that the Taguchi method is a powerful tool for improving the product quality in many areas. This paper employs the Taguchi method to reduce low-frequency booming noise in a passenger car. Selection of object function is very important to minimize interaction effects in the Taguchi method. We select logarithmic-scaled sound pressure level as an object function, which is commonly used to analyze the noise and vibration signals. The optimum noise level predicted with additive-model assumption agrees well with the test results. In addition, the optimum level is lower than the initial one by about 5 dB without any adverse effects. The results show that the Taguchi method can be applied efficiently to solve the noise problem in the passenger cars.

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