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This project has designed a material treatment process to extend the lifespan of extrusion augers used by the social enterprise Appropriate Energy Saving Technologies (AEST) in Uganda. AEST uses an extruder machine to recycle agricultural waste into charcoal briquettes that they sell to low-income families. The auger components wore down quickly and needed a hardening process to remain useful for...
Interruption property of vacuum interrupter with four different contact materials were researched by experimental method. The diameter of Wan-type contact and Spiral-type CuCr25 contact was 55mm. The diameter of Spiral-type CuCr35 and CuCr30 was 58mm. The contact thickness was 10mm before breaking test and the contact thickness was about 9mm after breaking test. The breaking current was 31.5kA and...
This article combining Internet development under innovation 2.0 with the new form of material management, take West Inner Mongolia Central Railway Corporation for example. Through discussion, it propose a new mode of railway materials management and solve the problem which are widespread of the current construction enterprise material management. It will solve deep-seated problems existing in the...
The present work deals with discrete-time models for the relaxation of soft biological connective tissues. Those are living materials composed of living cells embedded in a mainly organic intercellular substance. Wiener models, consisting of a linear dynamical model followed by a polynomial static function are used for identification of stress relaxation curves, drawn from experiments performed on...
Taiwanese memory packaging and testing factories include Powertech, ChipMOS, ASE, SPIL, Walton and FATC. The global three first tier giants, Samsung Electronics, Hynix and Micron, have predicted that the DRAM market in 2014 will be more stable. With the three-giant monopolization taking shape, the strategic alliance and corresponding excess profits of back-end packaging factories are expected to be...
In recent years, non-stationary, non-invasive imaging methodologies demonstrated as reliable, quantitative, remote characterization and evaluation methods for characterization of biological samples. This present work incorporates a digitized frequency modulated thermal wave imaging (DFMTWI) followed by time domain analysis for bone diagnostics, especially bone with tissue, skin and muscle over layers...
This contribution demonstrates an application of non-stationary frequency modulated thermal wave imaging technique for the numerical characterization of a mild steel sample containing random shape defects. Frequency and time domain based phase analysis schemes are implemented on the recorded thermal profiles and their detectabilities are compared by taking signal to noise ratio into consideration.
Active thermographic studies using non stationary coded thermal wave imaging methods facilitate deeper sub surface analysis with better depth resolution even with relatively low peak powers. They exhibit a variation in detection capability due to their diversity in shape and frequency content etc., In order to compare the ability of these schemes in spite of their diversity, a common feature based...
LEMA (Learning Environment for Modeling Abilities) is an ICT based tool developed in order to promote students' modeling abilities such as developing explanations of phenomena based on microscopic models, predicting the outcome of new phenomena and revising explanations in the light of experimental evidence. It is developed for the context of self study. In a prior study, we have reported that students...
This article is aimed at reviewing certain key aspects related to the inner- and outer insulation on dry high voltage condenser bushings fitted with silicone insulators. Some of the subjects covered are how the shed profile design impacts the pollution performance and ageing resistance, and how the selection of manufacturing method and material selection impacts the erosion resistance. Service experience...
This paper presents the implementation of a Virtual Instrumentation (VI) based system which is used for remote monitoring of biogas production activities. The proposed measurement approach was designed and is used by students during Measurement and Instrumentation lectures. It combines hardware and software knowledge while allowing the users to interact with a domain of great interest — biogas production...
This research examines how to develop a Knowledge Management System (KMS) which implements the question-based method in lesson study. Lesson study activity which has been running were not documented well, whereas its benefits are very good to encourage teachers' quality in learning activities. Question-based method applied is evaluation / assessment process that aims to engage teachers to contribute...
Three-dimensional printing technology, also known as additive manufacturing, has shown a significant increase in popularity as the cost of printers comes down and part accuracy and build quality continually improves. To date, the major limitation of the various additive manufacturing techniques is the limited range of print materials and properties, with 3d printed parts unable to be used in most...
A simple testing procedure has been developed in order to investigate and screen the current interruption capability of vacuum interrupter contact materials. A synthetic circuit delivering adjustable AC currents, followed by a pulsed of 21 kV peak for 2 seconds has been used. The electrical tests has been developed to reproduce the conditions close to a fault current rated at 12 kV; only the recovery...
In this paper we present a class of soft-robotic systems with superior load bearing capacity and expanded degrees of freedom. Spatial parallel soft robotic systems utilize spatial arrangement of soft actuators in a manner similar to parallel kinematic machines. In this paper we demonstrate that such an arrangement of soft actuators enhances stiffness and yield dramatic motions. The current work utilizes...
Reliable non-invasive assessment of mechanical properties of the arterial wall, either healthy or diseased, is of great importance for patient specific diagnosis in the field of vascular disease. Vascular elastography is a promising tool to assess these mechanical properties. Therefore, in this study, the most controllable and realistic approach of mechanical testing of arteries in vitro, inflation...
Radio frequency identification (RFID) tags are typically used for object identification in environments in which they are not exposed to very harsh conditions. However, there is an increasing demand for inexpensive RFID tags for use in harsh industrial environments, but the adequate performance of the materials used in them needs to be verified in such conditions. This paper reports the reliability...
GRCop-84 is a Cu-8 at.% Cr-4 at.% Nb alloy developed at NASA Glenn Research Center for use in rocket engine liners. Its high thermal and electrical conductivities make it a possible candidate for the electrical contact of a vacuum interrupter (VI). In this work, contacts were made from a warm rolled Cu-8Cr-4Nb plate and tested in a VI of the Axial Magnetic Field (AMF) type as well as a VI of the Transverse...
Polymer based organic photovoltaic systems, which can be mass-produced by roll-to-roll printing technology, hold the promise for a cost-effective, lightweight and mechanical flexible solar energy conversion platform. Nevertheless, challenges still remain for large-scale applications of these flexible solar cells. One of the issues of great importance is the long-time reliability of solar cell module...
Since the 50Sn32Pb18Cd eutectic solder was melted at 145 °C which is lower than the melting point of 63Sn37Pb solder (183 °C), it was selected as the interconnection joint to create a temperature gradient to avoid the former nearby 63Sn37Pb joint re-melted during the components assembly process. The tensile testing and the microstructure analysis were carried out on 50Sn32Pb18Cd eutectic solder to...
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