• Title/Summary/Keyword: Test method

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A Study on the Antibacterial Activity of Chitosan on the MRSA by the AATCC Test Method 100 and Modified AATCC Test Method 100

  • Choi, Jeong-Im;Jeon, Dong-Won
    • Fashion & Textile Research Journal
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    • v.4 no.6
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    • pp.557-563
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    • 2002
  • Water-soluble chitosan and water-insoluble chitosan with molecular weight of 2,000,000, 500,000, 80,000, and 40,000 with more than 90%of degree of deacetylation were produced to test antibacterial activity of chitosan against a pathogenic bacteria, Methicillin Resistant Staphylococcus aureus(MRSA). the AATCC Test Method 100and Modified AATCC Test Method 100 were used to evaluate the antibacterial activity of chitosan. Antibacterial activity of chitosan/acetic acid solution was the same when they were tested by two different methods, but those of polyester fabrics treated with chitosan/acetic acid solution were different in different antibacterial test. So several problems were found in the experimental methods. The AATCC Test Method 100 seems that excessive nutrition exists in inoculum solution by quantitative analysis on the basis the result of antibacterial activity on chitosan/acetic acid solution and amount of chitosan attached to the surface of treated fabrics.

A Study on Improvement of the low temperature flex resistance test method about high waterproof materials (고기능성 투습방수 소재의 저온굴곡 시험방법 개선 연구)

  • Lee, Minhee;Moon, Sunjeong;Ko, Hyeji;Hong, Seongdon
    • Journal of the Korean Society for Quality Management
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    • v.46 no.3
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    • pp.425-440
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    • 2018
  • Purpose: This study is aimed at developing of the flex resistance testing process at low temperature with the waterproof fabric to suit the military environment, and is designed to fit for the purpose of the waterproof materials in order to optimize the test method by finding out matters to improve from existing the test method and through previous studies. Methods: The test method, which has been applied to flex resistance of existing water-repellent materials, was improved and consequently, differentiated test results could be obtained according to the test temperature, sample size, and flexing method. Results: The testing of the total of 8 samples revealed that performance of the military requirement could hardly be met just by presenting the materials or 2~3 layers when the quality criteria for high functional water repellent fabrics were applied. PTFE(Polytetrafluoroethylene) is preferred to PU(Polyurethane) to be used in the extremely low-temperature environment, but durability under the low-temperature environment may be varied depending on film thickness or laminating technique even if the materials of waterproof films are identical. Therefore, in addition to the material or texture, the test method capable of reflecting durability under the low-temperature environment shall be suggested, and the newly designed test method proposed in this study was shown to suggest differentiated quality criteria by the material. Conclusion: The water resistance measurement and the test method following flex resistance with expanded range of flex will enable the differentiable test of the samples according to the number of repetition. This study is meaningful in that it suggests a differentiable test method capable of establishing a basis of deciding suitable material when selecting military goods made of water repellent material by properly improving the test method.

Conformance Testing of Multi-protocol IUTs (다중계층 프로토콜의 적합성시험 방안)

  • Park, Yong-Beom;Kim, Myeong-Cheol;Kim, Jang-Gyeong
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.11
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    • pp.3086-3096
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    • 1999
  • To declare conformance of multi-protocol Implementation Under Test(IUT), every layer of the multi-protocol IUT should be tested. According to ISO9646, single-layer test method is applied to testing the highest layer of multi-protocol IUT and single-layer embedded test method is used for the layers by layer all the protocols in a multi-protocol IUT. This paper proposes a new method for testing a multi-protocol IUT. The proposed test method assumes that a multi-protocol IUT is under test and that the interfaces between the layers cannot be controlled or observed by the tester. We apply the proposed test method to TCP/IP and compare the application results with those of the existing test turns out that the proposed test method significantly reduces the number of test cases as well as the number of test events while providing the same test coverage. In addition, the proposed test method shows the capability to locate the layer that is source of failure in testing multi-protocol IUTs.

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A Study on Torque Efficiency Test Method of Tandem Pump (탠덤 펌프의 토크효율 시험방법에 관한 연구)

  • 유진산;함영복;김성동
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.282-285
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    • 1997
  • The torque efficiency of oil hydraulic pump is an important factor for it's performance characteristics. A study on the performance test method of oil hydraulic pump is based on test standard, but there is to be desired an study for double or tandem type oil hydraulic piston pump. So in this study present a test method on the tandem pump for torque efficiency and analysis method of the results.

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Transiting test method for galloping of iced conductor using wind generated by a moving vehicle

  • Guo, Pan;Wang, Dongwei;Li, Shengli;Liu, Lulu;Wang, Xidong
    • Wind and Structures
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    • v.28 no.3
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    • pp.155-170
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    • 2019
  • This paper presents a novel test method for the galloping of iced conductor using wind generated by a moving vehicle which can produce relative wind field. The theoretical formula of transiting test is developed based on theoretical derivation and field test. The test devices of transiting test method for aerodynamic coefficient and galloping of an iced conductor are designed and assembled, respectively. The test method is then used to measure the aerodynamic coefficient and galloping of iced conductor which has been performed in the relevant literatures. Experimental results reveal that the theoretical formula of transiting test method for aerodynamic coefficient of iced conductor is accurate. Moreover, the driving wind speed measured by Pitot tube pressure sensors, as well as the lift and drag forces measured by dynamometer in the transiting test are stable and accurate. Vehicle vibration slightly influences the aerodynamic coefficients of the transiting test during driving in ideal conditions. Results of transiting test show that the tendencies of the aerodynamic coefficient curve are generally consistent with those of the wind tunnel tests in related studies. Meanwhile, the galloping is fairly consistent with that obtained through the wind tunnel test in the related literature. These studies validate the feasibility and effectiveness of the transiting test method. The present study on the transiting test method provides a novel testing method for research on the wind-resistance of iced conductor.

PSRUDODYNAMIC TEST METHOD

  • 이승준
    • Computational Structural Engineering
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    • v.2 no.3
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    • pp.30-34
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    • 1989
  • 이 글에서 Pseudodynamic(PSD) Test Method의 발전과정, 여러 구조 시스템에의 적용 예, 이 방법이 갖고 있는 문제점들, 그리고 앞으로 이 방법을 발전시킬 수 있는 분야 등을 기술하였다. 이에 근거하여 PSD Test Method가 구조물의 지진에 대한 거동을 시뮬레이션 할 수 있는 Technique임을 알 수 있으며 따라서 앞으로의 발전을 위해 많은 연구가 필요한 분야이다.

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No-Holding Partial Scan Test Mmethod for Large VLSI Designs (대규모 집적회로 설계를 위한 무고정 부분 스캔 테스트 방법)

  • 노현철;이동호
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.35C no.3
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    • pp.1-15
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    • 1998
  • In this paper, we propose a partial scan test method which can be applied to large VLSI designs. In this method, it is not necessary to hold neither scanned nor unscanned flip-flops during scan in, test application,or scan out. This test method requires almost identical design for testability modification and test wave form when compared to the full scan test method, and the method is applicable to large VLSI chips. The well known FAN algorithm has been modified to devise to sequential ATPG algorithm which is effective for the proposed test method. In addition, a partial scan algorithm which is effective for the proposed test method. In addition, a partial algorithm determined a maximal set of flip-flops which gives high fault coverage when they are unselected. The experimental resutls show that the proposed method allow as large as 20% flip-flops to remain unscanned without much decrease in the full scan fault coverage.

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Scan Selection Algorithms for No Holding Partial Scan Test Method (무고정 부분 스캔 테스트 방법을 위한 스캔 선택 알고리즘)

  • 이동호
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.35C no.12
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    • pp.49-58
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    • 1998
  • In this paper, we report new algorithms to select scan flip-flops for the no holding partial scan test method. The no holding partial scan test method is identical to the full scan test method except that some flip-flops are left unscanned. This test method does not hold scanned or unscanned flip-flops while shifting in test vectors, or applying them, or shifting out test results. The proposed algorithm allows a large number of flip-flops to be left unscanned while maintaining almost the complete full scan fault coverage.

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A Study on Test Method for Evaluating Root Resistance in Waterproofing and Root Resistance Membrane Used in Landscape Architecture - A Test Method for Evaluating Root Resistance that Use a Simulated Needle and a Rhizome - (조경 녹화용 방수.방근층의 방근 성능평가 시험방법에 관한 연구 - 모의 바늘과 지하경을 이용한 방근 성능평가 시험방법 -)

  • Yi, Jun-Ho;Pyo, Soon-Ju;Shin, Jin-Hak;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.89-97
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    • 2009
  • As landscaping building roofs and concrete structures increase gradually for low carbon green growth policy of government, But waterproofing membranes of those structures are effecting by root penetration of landscape plant. 80, we progressed study about test method for fast evaluating root resistance of waterproofing materials jointly with Tokyo Institute of Technology. The result of the study is as follows: (1) The penetrating load of the needle at the displacement speed of 1mm/min was measured for various membrane to basis and lap joints of membrane, the load force was $3{\sim}50$ N by material variously. (2) According to the test method of deriving rhizomes of bamboo grass to basis and lap joints of membrane, there were no penetrated membrane until present, but need persistent observation. (3) Test method of deriving rhizomes of bamboo grass to basis and lap joints of membrane can shorten from period of 2 years to 1 year for testing. Because rhizomes of bamboo grass can grow from May to September, test is possible in same period.

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Test Method for Particle Removal Characteristic of Equipment Fan Filter Unit (EFFU) (Equipment Fan Filter Unit (EFFU)의 Particle 제거 성능평가 방법)

  • Lee, Yang-Woo;Ahn, Kang-Ho
    • Journal of the Semiconductor & Display Technology
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    • v.11 no.2
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    • pp.59-62
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    • 2012
  • This test method covers a procedure for measuring particle removal characteristic of equipment fan filter unit(EFFU) installed inside of semiconductor process equipments, FPD manufacturing equipments and so on. Since EFFU is a combination of air filter and the assembly of fan, motor and frame, the integrity of these parts is very important for the performance of EFFU. So a conventional particle removal test method for air filters is not suitable for EFFU particle removal performance. This test method defines an evaluation method for EFFU which is installed inside an enclosed space to remove particles that are generated inside process equipment. The particle removal performance of EFFUs is usually depending on the performance of filter media and air flow rate. To understand a performance of an EFFU, the filter media characteristic, air flow rate and the integrity of EFFU parts should be considered simultaneously. This test method is intended to demonstrate the system performance of an EFFU and successfully evaluated EFFU performance characteristics.