PPCA is a global association dedicated to the ongoing creation and distribution of technical and application information on plastic pipes system in order to educate and expand their safe, cost effective and sustainable use. Pipes were extruded using both approaches and properties were evaluated per the relevant ASTM and ISO standards for water and gas pressure pipe applications to compare the performance of extruded pipes.
In this context of changing and challenging market requirements, Gas Insulated Substation GIS has found a broad range of applications in power systems for more than two decades because of its high reliability, easy maintenance and small ground space requirement etc.
SF6 has been of considerable technological interest as an insulation medium in GIS because of its superior insulating properties, high dielectric strength at relatively low pressure and its thermal and chemical stability.
SF6 is generally found to be very sensitive to field perturbations such as those caused by conductor surface imperfections and by conducting particle contaminants.
The presence of contamination can therefore be a problem with gas insulated substations operating at high fields. If the effects of these particles could be eliminated, then this would improve the reliability of compressed gas insulated substation.
It would also offer the possibility of operating at higher fields to affect a potential reduction in the GIS size with subsequent savings in the cost of manufacture and installation. The purpose of this paper is to develop techniques, which will formulate the basic equations that will govern the movement of metallic particles like aluminum, copper in a coated as well as uncoated busduct.
In recent years, the areas of industrial application of AC drives, especially Induction machine based on DTC technique has gradually increased due to its advantages over the other techniques of control. However conventional DTC suffers from high torque ripple and variable switching frequency.
This paper, propose a method to reduce torque fluctuations, where the circular flux vector is divided into twelve sectors and is compared with conventional DTC method where the flux vector is divided into six. Electrical and Electronic Engineering Vol.
F and Sansui H, "Simulink model of direct torque control of Induction machine", American journal of applied sciences 5 8: Krishnan, Electric Motor Drives: Enhancing Reusability of Conventional Apollo Modules by proposing change in design and use of new ablative material Enhancing Reusability of Conventional Apollo Modules by proposing change in design and use of new ablative material Abstract: The paper deals with the reusability of command modules used during Apollo space missions.
During Apollo missions in 's the module surface becomes charred up to some extent, hence decreasing the strength and scope of further reusability of the module. A new design has been proposed and simulation results have revealed the possibility to reuse the module again for another mission.
The new design has incorporated an in-built mechanism that will extend some part of the module surface outwards near to the periphery of the base of the module. The design, mechanism, material and other details are discussed in succeeding sections.
New ablative material has been introduced for more getting more promising results. Design patterns have been the target of a great deal of research in the last few years. A design pattern is a general solution to a commonly occurring problem.
They are composed of three parts: This paper concentrates on developing a catalog for design patterns for safety-critical real-time systems and allows flexibility to choose, search a design pattern and add more design patterns.
This tool will be able to help generate the code for the suitable design pattern. Edition published in Safety assessment of design patterns for safety-critical embedded systems.(Click here for bottom) M m M. Latin, Marcus.A praenomen, typically abbreviated when writing the full tria nomina..
M'. Latin, Manius.A praenomen, typically abbreviated when writing the full tria nomina..
M, m, µ. Detine common ion effect: discuss its application qualitative analysis.
Descri\R preparation of ester from alcohol, also write mechanism in this respect. Explain the Of different transitions in and.
qualitative analysis: Determination of the identity of the chemical species in a sample. Precipitation is used in qualitative chemical analysis. This signifies that as the sulfate ion (SO 4 2-) is added to solution and its concentration increases, barium will precipitate first. The variety of available techniques and analytical methods applied in laboratories calls for the need of defining the scope, range of application and quality of information obtained using each of them with reference to internationally agreed standards.
Of these techniques, Gas Chromatography with Flame Ionization Detector (GC-FID) is most used in fatty acids analysis. Type or paste a DOI name into the text box. Click Go. Your browser will take you to a Web page (URL) associated with that DOI name.
Send questions or comments to doi. Chemistry Qualitative Analysis Introduction General comments: It is always a good idea to use as few chemicals as possible; it makes sense (see text box in margin note area). For qualitative analysis, it is useful to divide the pH scale into at least three categories: strongly acidic A complex ion reaction produce a deep blue.