Set Of Test Procedures Research Articles

Development of a MATLAB Toolbox for Mobile Radio Channel Simulators

A profound knowledge of mobile radio channels is required for the development, evaluation, and also assessment at practical conditions of present and future mobile radio communication systems. The modelling, analysis, and simulation of mobile radio channels are important key area in current context. In addition to that, knowledge of channel behaviour in mobile radio communication is extensively recommended for the study of transmitter/receiver performances under different propagation scenarios. Our intention in this research work was to develop various kinds of mobile fading channel simulators using MATLAB and embed them into MATLAB software as a toolbox. Implemented channel simulators were combined MATLAB as a toolbox which users can easily select well-known channel models to test and to study the performance of mobile communication systems. It gives better support for the new users to work on the developed channel simulators, run the test procedures as well as parameter computation. The toolbox contains channel simulators for simulating non-stationary land mobile satellite channel, spatial shadowing processes, MIMO channels, multiple uncorrelated Rayleigh fading channels, mobile to mobile channel, frequency hopping channels etc. Set of test procedures were developed such as the autocorrelation function ACF, average duration of fades ADF, the probability density function PDF, and the level-crossing rate LCR etc., in order to test and to confirm the correctness of the implemented channel simulators. Proposed new algorithms to compute the model parameters of the channel simulators were also implemented in the toolbox to enable the parameterization of the channel simulators under specific propagation conditions. Some of the simulation models were implemented based on specification of GSM system by CEPT-COST 207. DOI: http://dx.doi.org/10.4038/jur.v2i1-2.7853 J. Univ. Ruhuna 2014 2:40-45

Development of compatibility assessments for full-width and offset frontal impact test procedures in FIMCAR

The goal of the project FIMCAR (Frontal Impact and Compatibility Assessment Research) was to define an integrated set of test procedures and associated metrics to assess a vehicle's frontal impact protection, which includes self- and partner-protection. For the development of the set, two different full-width tests (full-width deformable barrier [FWDB] test, full-width rigid barrier test) and three different offset tests (offset deformable barrier [ODB] test, progressive deformable barrier [PDB] test, moveable deformable barrier with the PDB barrier face [MPDB] test) have been investigated. Different compatibility assessment procedures were analysed and metrics for assessing structural interaction (structural alignment, vertical and horizontal load spreading) as well as several promising metrics for the PDB/MPDB barrier were developed.The final assessment approach consists of a combination of the most suitable full-width and offset tests. For the full-width test (FWDB), a metric was developed to address structural alignment based on load cell wall information in the first 40 ms of the test. For the offset test (ODB), the existing ECE R94 was chosen. Within the paper, an overview of the final assessment approach for the frontal impact test procedures and their development is given.

Characterization of Triangulation-Based 3D Imaging Systems Using Certified Artifacts

A set of test procedures and certified artifacts to characterize the capability of short-range triangulation-based three-dimensional (3D) imaging systems are presented. The approach consists of sca...

A Study on Improving the Efficiency of the Knapp Test for Injection Ampoule Inspection by Applying the Taguchi Method, TRIZ and CBR

This study first defined two major problems in the automatic inspection of the inspection machine for injection medicines, which were the inspection results falling beyond the target range resulting in a low performance ratio and a lengthy process of machine parameter adjustments to reach the expected performance ratio. It then performed a manual inspection to determine the existing performance status. During the analysis phase of the study, TRIZ and CBR (case based reasoning) were integrated and used as the manifest tool to inspect and adjust the parameters related to the Knapp test for the purpose of utilizing their ways of systematic thinking to find the relative parameters that might affect the inspection quality, and further to confirm four major parameters through screening by TRIZ and CBR, including the magnification, the bi-qualitative alloplasm of the relative positions of different images, the maximum floating foreign particle lumps and the maximum foreign particle lumps. During the improvement phase of the study, a set of test procedures combining the Taguchi method and analysis of variance was proposed to determine the optimum parameter combination of the major parameters. The validation tests confirmed that the problem solution structure developed in this study could allow the automatic inspection to realize the expected efficiency. This structure could make a significant contribution to the application of the Knapp test in medical automatic inspection systems, and serve as a reference to industries relying on manual production or inspection.

Methodology for commissioning a brachytherapy treatment planning system in the era of 3D planning

To describe the steps undertaken to commission a 3D high dose rate (HDR) brachytherapy treatment planning system (TPS). Emphasis was placed on validating previously published recommendations, in addition to checking 3D parameters such as treatment optimization and dose volume histogram (DVH) analysis. Commissioning was performed of the brachytherapy module of the Nucletron Oncentra MasterPlan treatment planning system (version 3.2). Commissioning test results were compared to an independent external beam TPS (Varian Eclipse v 8.6) and the previously commissioned Nucletron Plato (v 14.3.7) brachytherapy treatment planning system, with point doses also independently verified using the brachytherapy module in RadCalc (v 6.0) independent point dose calculation software. Tests were divided into eight categories: (i) Image import accuracy, (ii) Reconstruction accuracy, (iii) Source configuration data check, (iv) Dose calculation accuracy, (v) Treatment optimization validation, (vi) DVH reproducibility, (vii) Treatment export check and (viii) Printout consistency. Point dose agreement between Oncentra, Plato and RadCalc was better than 5% with source data and dose calculation protocols following the American Association of Physicists in Medicine (AAPM) guidelines. Testing of image accuracy (import and reconstruction), along with validation of automated treatment optimization and DVH analysis generated a more comprehensive set of testing procedures than previously listed in published recommendations.

C12: The timing properties of the embedded neuron chip task schedule

The paper presents experimental results of timing of the embedded task scheduler built in a Neuron Chip microcontroler firmware. The predefined scheduler algorithm is analyzed. The indirect measurement method of the scheduler overhead has been developed. A set of testing procedures in Neuron C language connecting the scheduler operations with I/O action is presented. The experimental results of best-case scheduler’s timing measures are reported.

Testing of fluorescent DC lamps for Solar Home Systems

AbstractWith the advent of the Universal Technical Standard for Solar Home Systems, procedures to test the compliance of SHS fluorescent lamps with the standard have been developed. Definition of the laboratory testing procedures is a necessary step in any lamp quality assurance procedure. Particular attention has been paid to test simplicity and to affordability, in order to facilitate local application of the testing procedures, for example by the organisations which carry out electrification programmes. The set of test procedures has been applied to a representative collection of 42 lamps from many different countries, directly acquired in the current photovoltaic rural electrification market. Tests apply to: lamp resistance under normal operating conditions; lamp reliability under extreme conditions; under abnormal conditions; and lamp luminosity. Results are discussed and some recommendations for updating the relevant standard are given. The selected technical standard, together with the proposed testing procedures, form the basis of a complete quality assurance tool that can be applied locally in normal electrical laboratories. Full testing of a lamp requires less than one month, which is very reasonable on the context of quality assurance programmes. Copyright © 2001 John Wiley & Sons, Ltd.

Aspects of performance assessment of whole body imaging systems.

Regular quality control is one of the cornerstones of nuclear medicine and a prerequisite for adequate diagnostic imaging. Many papers have been published on quality control of planar and tomographic imaging systems. Up to now, however, only minor attention has been given to the assessment of the performance of whole body imaging systems. In this paper we present a comprehensive set of test procedures including acceptance testing and regular quality control. It is not our purpose to present a thorough analysis of the methods and results. The selection of the tests is discussed and the tests are described; some results are presented. In addition action thresholds are proposed. The quality control tests can be applied to systems with either a moving detector or a moving imaging table, and to both detectors with a large field of view and detectors with a small field of view. The tests presented in this paper do not require special phantoms or sources other than those used for quality control of stationary gamma cameras. They can be applied for acceptance testing and for performance testing in a regular quality assurance programme.

THE SOLDERABILITY EVALUATION OF SURFACE MOUNT COMPONENTS THROUGH THE USE OF WETTING BALANCE ANALYSIS

Solderability is an important concern in the surface mount assembly of Printed Circuit Boards (PCBs). It impacts assembly reliability and yield. The solderability requirement of the components and boards used in surface mount PCB assembly is critical since the solder joint needs to provide both the electrical and the mechanical connections. The advent of ultrafine pitch components has only helped to increase the importance of solderability in surface mount assembly. Solderability evaluation for surface mount components and the identification and study of factors that influence it are of primary importance in the surface mount assembly of PCBs. The wetting balance can provide a quantitative investigation of solderability through measurement of wetting speed and the wetting force. It has been used for the solderability testing of through hole components. The use of the wetting balance apparatus for the testing of surface mount components raised several concerns. Some modifications were made to simplify the testing operations, to enhance the precision of the wetting balance apparatus and to enable the collection of more accurate data. The preliminary experiments explored the nature of the wetting balance test and helped identify a standardized process that could provide valid conclusions. A set of validated test parameters and a standardized set of test procedures that could be used to perform the incoming solderability testing of surface mount components were established. While the test procedures used in this research were a derivative of the IPC ANSI J-STD-002 standard, changes were made based upon the experience gained through the test schedule and the results and inferences obtained through preliminary experiments. Various types of mass reflow surface mount components were measured by their relative solderability. The solderability of tape automated bonding components with various plating metallurgy and coating thicknesses was also tested. The specific testing parameters used, the test procedures adopted, the data collected and the inferences made are presented in this paper.