Mondal K.,MIET |
Sarkar P.P.,Kalyani University
Microwave and Optical Technology Letters | Year: 2017
In this work, a dual bands omnidirectional monopole antenna is proposed. A planer Y-shaped patch is loaded on the top of the surface and a slot is loaded on the ground plane to obtained broadband. Rogers RT/duroid5880(tm) substrate is used with dielectric constant 2.2 and loss tangent 0.0009. The results of the proposed antenna for the variation of width and length of the ground plane are investigated. Two licensed free frequency bands at 2.4 GHz and 5.8 GHz are obtained for WiFi and Bluetooth application. The measured frequency bands of 2.3–2.52 GHz at 2.4 GHz and 4.22–10.30 GHz with two resonant frequencies at 4.96 and 8.36 GHz are obtained. The peak antenna gain of 4.6 dBi at 2.4 GHz is achieved. Simulation has been done using MOM base Ansoft designer software. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1061–1065, 2017. © 2017 Wiley Periodicals, Inc.
Coates S.,MIET |
Wray N.,University of Nottingham
IET Conference Publications | Year: 2016
Modern railway vehicles carry an OTMR (On Train Monitoring Recorder) device, analogous to the classic "black box" of aeroplanes, and this records many channels of data which give information about the current state of a unit (train vehicle set), such as its speed, acceleration, throttle position, brake setting, brake cylinder pressure and so on, at very small consecutive time intervals (typically down to 0.1 seconds). This data can be used to create Key Performance Indicators (KPIs) to monitor the performance of individual trains and direct the most efficient use of maintenance resources. The ultimate aim of this research is to develop a computer system into which can be fed all the data from each channel of the OTMR from each unit, at specific times (such as at the end of each operating day), the idea being to spot deviations from the expected and experienced KPI patterns as early on as possible. The techniques and algorithmic routines discussed in this paper have shown that it is possible to utilise hardware that every UK train is already required to have by law (and which is also compulsory in many other international railway environments), to facilitate an efficient and commercially attractive approach to rolling stock fault analysis, especially for (but not limited to) older trains which are not equipped with modern telemetry systems. The current project arose out exploratory discussions by Angel Trains Limited (a leading UK Rolling Stock Operating Company (ROSCO)) and Fishbone Solutions of Derby, UK, about looking at innovative ways to improve train performance using existing resources already available on units.
Ignatov D.,Bachelor |
Zhurbina N.,Bachelor |
Journal of Physics: Conference Series | Year: 2017
3-D composites are widely used in tissue engineering. A comprehensive analysis by X-ray microtomography was conducted to study the structure of the 3-D composites. Comprehensive analysis of the structure of the 3-D composites consisted of scanning, image reconstruction of shadow projections, two-dimensional and three-dimensional visualization of the reconstructed images and quantitative analysis of the samples. Experimental samples of composites were formed by laser vaporization of the aqueous dispersion BSA and single-walled (SWCNTs) and multi-layer (MWCNTs) carbon nanotubes. The samples have a homogeneous structure over the entire volume, the percentage of porosity of 3-D composites based on SWCNTs and MWCNTs - 16.44%, 28.31%, respectively. An average pore diameter of 3-D composites based on SWCNTs and MWCNTs - 45 μm 93 μm. 3-D composites based on carbon nanotubes in bovine serum albumin matrix can be used in tissue engineering of bone and cartilage, providing cell proliferation and blood vessel sprouting. © Published under licence by IOP Publishing Ltd.
IET Conference Publications | Year: 2016
Global trends forecast a rise in the demand for electric vehicles. This is further strengthened by evidence of changing customer expectations, of decreasing battery cost and improving efficiency, and of increasing government stimulus. This thus implies the rise in the number of electric vehicle batteries that will be manufactured and distributed globally. Automakers ought to consider the impact on their business and how the adoption of environmental management systems can help mitigate associated risks and costs as these batteries approach their end of life. The changing global market and the introduction of innovative business models along with tightening emission standards will force automakers to at least partial electrification of the product portfolio and it is therefore vital for them to start considering appropriate environmental management systems such as ISO14001. This paper asks the questions 'why adopt ISO practices in this area?' and 'is all this relevant to an Indian OEM?'. © 2016, Institution of Engineering and Technology. All rights reserved.
Rohilla A.,MIET |
Krishan P.,Punjabi University
Pharmacological Research | Year: 2010
Thiamine, known as vitamin B1, plays an essential role in energy metabolism. Benfotiamine (S-benzoylthiamine O-monophoshate) is a synthetic S-acyl derivative of thiamine. Once absorbed, benfotiamine is dephosphorylated by ecto-alkaline phosphatase to lipid-soluble S-benzoylthiamine. Transketolase is an enzyme that directs the precursors of advanced glycation end products (AGEs) to pentose phosphate pathway. Benfotiamine administration increases the levels of intracellular thiamine diphosphate, a cofactor necessary for the activation transketolase, resulting in the reduction of tissue level of AGEs. The elevated level of AGEs has been implicated in the induction and progression of diabetes-associated complications. Chronic hyperglycemia accelerates the reaction between glucose and proteins leading to the formation of AGEs, which form irreversible cross-links with many macromolecules such as collagen. In diabetes, AGEs accumulate in tissues at an accelerated rate. Experimental studies have elucidated that binding of AGEs to their specific receptors (RAGE) activates mainly monocytes and endothelial cells and consequently induces various inflammatory events. Moreover, AGEs exaggerate the status of oxidative stress in diabetes that may additionally contribute to functional changes in vascular tone control observed in diabetes. The anti-AGE property of benfotiamine certainly makes it effective for the treatment of diabetic neuropathy, nephropathy and retinopathy. Interestingly, few recent studies demonstrated additional non-AGE-dependent pharmacological actions of benfotiamine. The present review critically analyzed the multifaceted therapeutic potential of benfotiamine. © 2010 Elsevier Ltd.
Proceedings of the International Astronautical Congress, IAC | Year: 2013
The static operation of an EmDrive microwave thruster has once again been demonstrated by the Chinese experimental work reported in REF 1. The work repeats and enhances results obtained in earlier UK experiments, REF 2, and confirms the direct relation between specific thrust and Q factor of the cavity. This paper considers the dynamic operation of a thruster with the very high Q factors obtained when a cavity employs superconducting technology. The very high specific thrusts resulting from such second generation (2G) devices must be subject to the law of conservation of energy. It follows therefore, that there must be a mechanism which limits the acceleration of any vehicle propelled by a 2G EmDrive thruster. A mathematical model of a 2G thruster is described which illustrates such a mechanism. The results from the model illustrate the Doppler changes, which occur when a thruster is subject to acceleration. For Q factors around 1 × 109, the total Doppler shift moves the frequency outside the narrow resonant bandwidth of the cavity. This causes the loaded Q of the cavity, and thus the specific thrust, to decrease and therefore limits the acceleration. A technique, employing pulse operation and dynamic control of the cavity length, is described which enables partial compensation for the effect. The resulting thruster design, employing YBCO superconducting walls and liquid hydrogen cooling, achieves a specific thrust of 1 Tonne per kW, provided the acceleration is limited 0.5m/s/s. This low acceleration rate is compatible with primary in-orbit propulsion applications, and will be particularly suitable for deep space missions. For launch vehicles, the acceleration limitation is no obstacle; as a flight profile is proposed where high velocity is only achieved once clear of the atmosphere. Indeed the reusable, EmDrive propelled carrier vehicle itself, is only used to lift the payload to geostationary altitude, where an expendable propulsion module is used to provide orbital velocity. The resulting costs to geostationary orbit are predicted to be 130 times lower, when compared to current launch vehicles. Copyright ©2013 by the International Astronautical Federation.
IET Conference Publications | Year: 2012
Our experience suggests that an organisations' ability to solve their own problems are indicative of how likely they are to improve their overall performance. Many organisations deal with their problems in an order of priority, which is of course a highly effective method of tackling the right things. This can be negatively impacted however if a 'band-aid' approach affects the items on the priority list. Additionally, employing a one-size-fits-all approach to tackling problems often leads either to the simple problems becoming over-bureaucratised or the complex problems not being sufficiently analysed to fully understand their contributing factors. A proportionate approach to problem solving applies the appropriate level of rigour required to ensure that each problem is fully resolved, with the minimum amount of effort.
IET Conference Publications | Year: 2013
This paper describes Vattenfall's long term platform which is intended to cope with the quantity and rate of change of innovation driven by new Regulatory requirements and Smart Grid developments.
Engineering and Technology | Year: 2014
Some of the letters addressed to The Editor, E&T, are discussed. Brian Highe, in his letter, questions on Dickon Ross's editor's letter in the February issue of E&T, and poses several questions about the apparently utopian scene portrayed on the front cover. A letter by Mike Pannell discusses Dennis Sharp's letter about his unsatisfactory experience with mains LED lamps in a new house (February 2014) typifies the problems consumers face when trying to make good environmental decisions. Ian Griffiths, in his letter, is disappointed by Derek Salkeld's Comment column on risk management in the February 2014 issue. He says that the author only describes a process that enables project managers to make an estimate of the value of contingency, and does not cover any of the techniques that risk managers use to mitigate the identified risks and ultimately enable project managers to make timely decisions to maintain project schedules.
IET Conference Publications | Year: 2014
For many years now, the accuracy of data used for thermal evaluation of insulating materials and systems has been grossly impaired by systematic errors inherent in the degradation process itself. The most significant of these are the errors due to temperature variation within the oven chamber used for thermal ageing experiments. It is important to be able to declare within acceptable tolerances that the temperatures reported are actually those which the test materials were subjected in the course of ageing. Not only do test materials suffer wide variations about the nominal average temperature setting of the oven, they are also exposed to unknown temperatures that may be above or below the average value as the temperature profile within the oven is non-uniform. This becomes imperative when accurate comparison is required between two or more alternatives. This paper describes the improved processes and testing procedures required to address the problem.