Study of Opto-Mechanical Properties of Tubular Water Quenched Polyethylene Films

Tubular Water Quench (TWQ) is commonly used process to make Polypropylene based films (TQPP). This process has been tried for the first time to make Polyethylene films (TQPE) from HDPE-LLDPE blend. Polyethylene inculcates the inherent materialistic property of softness and better feel to the film. The key requirement for TWQ films are Openability and transparency. This paper focuses on novel developmental work done, using Polyethylene blend for making TQPE film, comparing it’s optical and mechanical properties with TQPP films.

Study of various thermal responses of PVC – CPVC Blends

Binary blends of Polyvinyl Chloride (PVC) / Chlorinated Polyvinyl Chloride (CPVC) were prepared using Haake Polylab extruder. The blends were then compression molded and their thermal properties were evaluated and compared. 7 different batches including virgin PVC and CPVC were prepared with varying PVC compositions from 10 to 90%. DMA results showed the immiscibility of blends above a certain composition. Colorimetry results give an insight into Yellowness index values of various blends with different compositions. Similarly, other improvements and optimization was observed and recorded for different batches while studying their thermal properties.

Spiral Bearing Lubrication with Viscosity Variation And Thermal Effect of Two Layer Fluid

In this paper a fluid film equation for two layer fluids and generalized Reynolds equation for convergent and divergent spiral bearing is derived with thermal effect. It is applied to see the effect of pre-load factor, viscosity variation, eccentricity, peripheral layer thickness. Expressions for load, pressure and coefficient of friction are derived and are analyzed numerically. The effect of pre-load factor analyzed for convergent and divergent spiral bearings. When pre-load factor is zero then both convergent and divergent spiral bearings are becomes journal bearing. It is observed the dimensionless load capacity values form the tables. The spiral bearing bears more load capacity than journal bearing. The effects of viscosity variation and thermal effect on these parameters are also analyzed.

Reduction of Cycle Time in assembly of Petter type Diesel Engine by modifying the Plant Layou

The work study done on the assembly line mainly deals with the time and motion study and work measurement to determine total time required to manufacture one engine and then applying lean manufacturing methods to fulfil the problem of productivity improvement. The first step of the work study will be the study of current process of production. After the collection of current process, time of all the assembly tasks involved is reduced using time study techniques. Along with time study, process analysis will be carried out which will give us idea of number of non-productive tasks carried out during the assembly and thus reducing them. Hence by implementing Value Stream Mapping method for lean manufacturing and reducing the non-productive tasks, the project will display the effort of increasing the productivity of the manual assembly line of Petter engine.

Ortho-chloronitrobenzene hydrogenation over carbon supported Rh-Cu catalysts

The promotional effect of Cu on the catalytic performance of supported Rh catalysts in the selective hydrogenation of ortho-chloronitrobenzene to ortho-chloroaniline was studied using carbon support. The catalysts were characterised by BET, H2 chemisorption, TEM. Rh surface is partially covered by Cu as a result of interaction between Rh and Cu. The superficial Cu species activate the N=O bond of chloronitrobenzene. Thus, the bimetallic RhCu catalysts exhibited excellent performance, producing chloroaniline with excellent selectivity.

Implementation of 4X4 Embedded Logic Memory for High Speed Applications

With increasing complexity of data processing applications, there is a huge demand for high storage compact memories. It is highly desirable that memories have low access time and consume less power. Processing of data along with parallel memory storage has proved to be more efficient than serial operation. One such approach to paralleling processing is the concept of Embedded Memories. By inserting the logic within architecture of the flip-flop, the chip area can be reduced. Also, through means of Conditional Shut-down, the power consumption can be reduced. In this paper, we propose a modified dual dynamic hybrid node Embedded Logic D-Flip flop architecture. The work is based on DSCH 3.5 and Microwind 3.5 tools. We have simulated the design for 90nm, 65nm and 45nm technology respectively. Compared to the previous architectures, we have obtained a reduction in propagation delay by 15.38% and reduction in power consumption by 32.69%. Further, we have designed a 4X4 memory using our proposed Embedded Logic Flip Flop. The embedded memory finds applications in highly complex data processing applications, scan test circuits etc

Effect of UHMWPE Incorporation on Microstructural and Mechanical Responses of HDPE Matrix

<span>Binary blends of High density Polyethylene (HDPE) / Ultra high molecular weight polyethylene (UHMWPE) were prepared using Twin Screw Extruder (TSE). The blends were then Injection molded and analyzed for their thermal, mechanical and morphological characteristics. Differential scanning calorimetry (DSC) analyses showed an increase in melting temperature, while other properties such as crystallization temperature and percentage crystallinity were unaffected. Investigated HDPE/UHMWPE blends showed improvement in tensile, impact and flexural properties with UHMWPE content. However, strain at break suffered a decrease. Scanning electron microscopy (SEM) of cryo-fractured surface (Samples fractured after dipping in liquid nitrogen) revealed distinct two-phase morphology for such blends. SEM analyses of tensile fractured surfaces facilitated in qualitatively understanding the underlying failure mechanisms. </span>

Estimation of the Buffet Limited Altitude for a Typical Commercial Jet Aircraft

The estimation of Buffet limit altitude is highly pertinent while dealing with high altitude operations of commercial jet airplanes. Since buffet limitation is an important factor in deciding the airplane performance, the estimation of the same is highly recommended for day to day operations. In the research work conducted, the buffet restriction is considered by considering a load factor of 1.3 associated with 390 bank angle. The study is conducted under ISA, ISA+15 conditions for the airplane with fixed weight at the top of the climb segment. The main motive is to analyze the variation of 1.3g buffet limited altitude when the outside air temperature turns hotter and its dependence on airplane weight. The mathematical equations used for calculating the variation of lift with altitude and ISA conditions are stated in the paper. The results are well illustrated with the aid of graphs and plots. The research offers a wide scope on the analysis of altitude limitations for commercial jet airplanes and a sharp orientation towards further studies in the respective regime.

Enhanced Privacy and Security in Mobile Cloud Computing

Mobile cloud computing is computing of Mobile application through cloud. Now days, market of mobile phones is growing rapidly. According to IDC, the premier global market intelligence firm, the worldwide Smartphone market grew 42.5% year over year in the first quarter of 2012.With the growing demand of Smartphone the demand for fast computation is also growing. In spite of comparatively more processing power and storage capability of Smartphone’s, they still lag behind Personal Computers in meeting processing and storage demands of high end applications like speech recognition, security software, gaming, health services etc. Mobile cloud computing is an answer to intensive processing and storage demand of real-time and high end applications. Mobile cloud is most emerging factor in this century. Being in nascent stage, Mobile Cloud Computing has privacy and security issues which deter the users from adopting this technology. Privacy and security is the most important factors in mobile cloud. This paper mainly explains about both of them. This review paper throws light on privacy and security issues of Mobile Cloud Computing.

Influence of Synthesis Variables on the Textural Properties of Mesoporous Carbon Xerogels

Influence of synthesis variables on the textural properties of mesoporous carbon xerogels is studied. Variables explored in synthesizing mesoporous carbon xerogels (CX) are: (i) initial formaldehyde/resorcinol molar ratio in preparing the sol, (ii) pH of sol-gel processing, (iii) temperature of gelling and subsequent curing of the gel, and (iv) mode of subcritical drying of the wet gel. Making of sol having formaldehyde/resorcinol molar ratio little higher than 2 and sol-gel processing at pH around 6 resulted in carbon xerogel with wide pores. Curing of gel at higher temperature resulted in carbon xerogel with narrower pores. Drying of the organic gel after exchanging water with low boiling organic solvent was highly beneficial in obtaining carbon xerogel with wider pores along with larger mesoporous area.