• Title/Summary/Keyword: Software testing

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The signal processing algorithm of the Missile Flight Test Launch Control System (비행시험 발사통제 시스템의 신호처리 알고리즘)

  • Oh, Jino
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.8
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    • pp.1965-1972
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    • 2015
  • The Missile Flight Test Launch Control System is to operate in conjunction with the Fire Control System during flight test to guided weapons. Also, this is a system for the test control and situation monitoring depending on the type of guided weapons and testing purposes. Message structure, communication protocols, such as data types for interworking with the fire control system and the Missile Flight Test Launch Control System are defined in the Launch Control ICD(Interface Control Document). ICD are composed differently of each guided weapons system and each test object. Previously, in order to interwork with the Fire Control System, the interlocking software was developed, which had a variety of problems. Therefore, we developed a new parsing algorithm in order to recognize the variety of Launch Control ICD and verified that the algorithm operates normally by checking transmitting and receiving various message in conjunction with the fire control system.

An Adaptive Tutoring System based on CAT using Item Response Theory and Dynamic Contents Providing (문항반응 이론에 의한 컴퓨터 적응적 평가와 동적 학습내용 구성에 기반한 적응형 고수 시스템)

  • Choi Sook-Young;Yang Hyung-Jeong;Baek Hyon-Ki
    • Journal of KIISE:Software and Applications
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    • v.32 no.5
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    • pp.438-448
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    • 2005
  • This paper proposes an adaptive tutoring system that provides learning materials dynamically according to the learners' teaming character and ability. Our system, in which a learning phase and a test phase are linked together, supports the personalized instruction-learning by providing the teaming materials by level in the learning phase according to the teaming ability estimated in the test phase. We design and implement a tutoring system consisted of an evaluation component and a learning component. An evaluation component uses a computerized adaptive test(CAT) based on item response theory to evaluate learners' ability while a learning component employs fuzzy level set theory so that teaming contents are provided to learners according to learners' level.

Development and Applications of A Paternity and Kinship Analysis System Based on DNA Data (유전자 분석 자료에 의한 친자 및 혈연관계 분석시스템 개발 및 활용)

  • Koo, Kyo-Chan;Kim, Sun-Uk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.10
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    • pp.6715-6721
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    • 2015
  • Recently, DNA data of missing person, killed person, and missing child continue to increase but most of statistical calculation for paternity confirmation is being done through manual methods or Excel. Therefore, we need development of a software which is able to facilitate both systematic management and effective analysis of Short Tandem Repeat (STR) derived from DNA data. Without extensive testing, through a twenty-month study was developed a web-based system which performs paternity analysis and kinship analysis easily based on the various options. The former uses an existing algorithm for paternity index and the latter does Identity by descent (IBD) formula. Due to our system validated over real datasets in terms of likelihood ratio and probability of paternity, it ensures increased reliability as well as effective management and analysis of DNA data in mass disaster. In addition, it includes advanced features such as an integrated environment, user-centered interface, process automation and so on.

Diagnosis of Parkinson's Disease Using Two Types of Biomarkers and Characterization of Fiber Pathways (두 가지 유형의 바이오마커를 이용한 파킨슨병의 진단과 신경섬유 경로의 특징 분석)

  • Kang, Shintae;Lee, Wook;Park, Byungkyu;Han, Kyungsook
    • KIPS Transactions on Software and Data Engineering
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    • v.3 no.10
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    • pp.421-428
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    • 2014
  • Like Alzheimer's disease, Parkinson's Disease(PD) is one of the most common neurodegenerative brain disorders. PD results from the deterioration of dopaminergic neurons in the brain region called the substantia nigra. Currently there is no cure for PD, but diagnosing in its early stage is important to provide treatments for relieving the symptoms and maintaining quality of life. Unlike many diagnosis methods of PD which use a single biomarker, we developed a diagnosis method that uses both biochemical biomarkers and imaging biomarkers. Our method uses ${\alpha}$-synuclein protein levels in the cerebrospinal fluid and diffusion tensor images(DTI). It achieved an accuracy over 91.3% in the 10-fold cross validation, and the best accuracy of 72% in an independent testing, which suggests a possibility for early detection of PD. We also analyzed the characteristics of the brain fiber pathways of Parkinson's disease patients and normal elderly people.

Destructive Test of a BLDC Motor Controller Utilizing a Modified Classification Tree Method (변형된 Classification Tree Method를 이용한 BLDC 모터제어기 파괴 시험)

  • Shin, Jae Hyuk;Chung, Ki Hyun;Choi, Kyung Hee
    • KIPS Transactions on Software and Data Engineering
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    • v.3 no.6
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    • pp.201-214
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    • 2014
  • In this paper, we propose a test case generation method adequate to destructive test of the BLDC(Brush Less Direct Current) motor controller used for the MDPS(Motor Driven Power Steering) system embedded in an automobile. The proposed method is a modified CTM(Classification Tree Method). CTM generates test cases assuming that all inputs are equally important. Therefore, it is very hard to generate test cases for extreme situations. To overcome the drawback and generate test cases specialized for destructive test. a modified CTM that compensates the limitation of traditional CTM is proposed. The proposed method has an advantage that it can intensively generate the test scenarios adequate to extreme situations by combining the test cases generated by the transitional CTM the while keeping the merit of the traditional CTM. The test scenarios for destructive test for the MDPS system embedded in a commercial automobile are generated utilizing the proposed method. The effectiveness of the proposed algorithm is verified through the test.

Vulnerability Analysis on the Mobile Core Network using OpenAirInterface (OpenAirInterface를 통한 모바일 코어네트워크 보안위협 분석)

  • Oh, In Su;Park, Jun Young;Jung, Eun Seon;Yim, Kang Bin
    • Smart Media Journal
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    • v.9 no.3
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    • pp.71-79
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    • 2020
  • Mobile network is used by many users worldwide for diverse services, including phone-call, messaging and data transfer over the Internet. However, this network may experience massive damage if it is exposed to cyber-attacks or denial-of-service attacks via wireless communication interference. Because the mobile network is also used as an emergency network in cases of disaster, evaluation or verification for security and safety is necessary as an important nation-wide asset. However, it is not easy to analyze the mobile core network because it's built and serviced by private service providers, exclusively operated, and there is even no separate network for testing. Thus, in this paper, a virtual mobile network is built using OpenAirInterface, which is implemented based on 3GPP standards and provided as an open source software, and the structure and protocols of the core network are analyzed. In particular, the S1AP protocol messages captured on S1-MME, the interface between the base station eNodeB and the mobility manager MME, are analyzed to identify potential security threats by evaluating the effect of the messages sent from the user terminal UE to the mobile core network.

Web-based Software Tool for Generating Music Therapy System Through Emotion Expression - Visual Expression - (웹 환경에서 감성적 표현요소를 통한 음악 치료 시스템 개발 - 시각요소를 중심으로 -)

  • Kim, Tae-Sik;Hyun, Hye-Jung
    • The Journal of the Korea Contents Association
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    • v.7 no.6
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    • pp.177-184
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    • 2007
  • The purpose of this study is to develop tool that makes students and teachers generate the music therapy system of type as they want by using existing several web-based component technologies. This study develops tool that can generate psychological testing system and users can select image(visual expression) that represents best their psychological state and after some stage can listen the most adequate music in that situation and it can be used as a music therapy too. This tool makes be possible for developer to input and arrange question types and stages, images that can show images connected with them and to offer skill that let them hear adequate music after deciding psychological state. This system development will be able to approach the contents development which is various from education field effectively in order.

Association Between Physical Performance and Bone Mineral Density in Elderly Women (여성 노인에서 운동 수행능력과 골밀도의 관계)

  • Shin, Hwa-Kyung;Cho, Kwang-Ho
    • The Journal of Korean Physical Therapy
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    • v.21 no.4
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    • pp.37-42
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    • 2009
  • Purpose: The purpose of this study was to determine the effect of physical performance on bone mineral density (BMD) in elderly women. Methods: Twenty-one elderly women participated in this study. After testing functional ambulation category (FAC), they were classified into two groups: dependent walking group, those who could not walk independently (FAC 0~2, n=11) and independent walking group those who could walk independently (FAC 3~5, n=10). Outcome measures were: general characteristics, physical performance and BMD. General characteristics included age, body mass index (BMI) and waist-hip ratio. Physical performance included the chair rise test (CRT) and the modified fall efficacy scale (MFES). BMD was represented in the osteoporosis index (OI), T-score and Z-score. BMD was evaluated in calcaneal bone, using OsteoPro. The data was analyzed using SPSS 12.0 software and the Mann-Whitney U test and the Spearman correlation. Results: Age, BMI and waist hip ratio, which all affect BMD, showed no significant differences between groups (p>0.05). But the FAC 3~5 group showed a significantly higher score for CRT, MFES and T-score, compared with the FAC 0~2 group (p<0.05). The T-score was correlated with CRT and MFES scores (p<0.05). Conclusion: There is a positive relationship between physical performance and BMD. Therefore, improved physical performance can have a beneficial effect by reducing osteoporosis in elderly women, considering a positive relationship between physical performance and BMD.

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Absolute phase identification algorithm in a white light interferometer using a cross-correlation of fringe scans (백색광 간섭기에서 간섭 무늬의 상호 상관관계 함수를 이용한 절대 위상 측정 알고리즘)

  • Kim, Jeong-Gon
    • Journal of Sensor Science and Technology
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    • v.9 no.4
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    • pp.316-326
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    • 2000
  • A new signal processing algorithm for white light interferometry has been proposed and investigated theoretically. The goal of the algorithm is to determine the absolute optical path length of an interferometer with very high precision (<< one optical wavelength). The algorithm features cross-correlation of interferometer fringe scans and hypothesis testing. The hypothesis test looks for a zero order fringe peak candidate about which the cross-correlation is symmetric minimizing the uncertainty of misidentification. The shot noise limited performance of the proposed signal processing algorithm has been analyzed using computer simulations. Simulation results were extrapolated to predict the misidentification rate at Signal to-Shot noise ratio (SNR) higher than 31 dB. Root-mean-square phase error between the computer-generated zero order fringe peak and the estimated zero order fringe peak has been calculated for the changes of three different parameters (SNR, fringe scan sampling rate, coherence length of light source). Results of computer simulations showed the ability of the proposed signal processing algorithm to identify the zero order fringe peak correctly. The proposed signal processing algorithm uses a software approach, which is potentially inexpensive, simple and fast.

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Finite Element Analysis of an Agricultural Tractor Cabin based on the OECD Standard(code 4) (OECD규정(제4항)에 기초한 농업용 트랙터 캐빈의 유한요소 해석)

  • 하창욱;김현진;구남서;권영두
    • Journal of Biosystems Engineering
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    • v.28 no.4
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    • pp.305-314
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    • 2003
  • The ROPS of an agricultural tractor is designed to protect its driver when the tractor overturns. Although the current OECD tests to determine whether the ROPS meets the requirements of the OECD regulation are desirable, they need long time to test. We experimental time and effort by using CAE. We conducted a finite element analysis for the ROPS design of a Dae-Dong tractor cabin in an attempt to reduce the design and manufacturing time. This study shows the interpretative skill using MARC(v.2000) for designing ROPS and difference between the results of testing and FEA. Design process is generally divided into two phases: a concept and a detail design. The concept design uses simple analysis to predict structural behavior, whereas the detail design involves a finite element analysis performed by the results of the concept design. This study focused on the detail design and used Patran(v.2000r2) and MARC(v.2000) of the MSC software corporation. The model consisted of 4812 elements and 4582 nodes. Four tests. specified in the OECD standards, were performed: (1) longitudinal loading test (2) rear crushing test (3) side loading test (4), and front crushing test. Independent analyses were also performed for each test, along with a sequential analysis. When compared, the results of the independent and sequential analyses were found to be similar to the test results.