An experimental investigation was carried out on a single cylinder compression ignition engine to find out the emissions variation with change in amount substitution of Compressed Natural gas under duel fuel mode with diesel as pilot fuel. The emissions such as CO, NOx, CO2 & UBHC values were compared with that of normal diesel and at various substitutions of CNG. CNG was sent into the engine through induction in various percentages such as 2.5, 5,7.5,9 lpms.

Rapid prototyping is a group of techniques used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design (CAD) data. Construction of the part or assembly is usually done using 3D printing technology. The first techniques for rapid prototyping became available in the late 1980s and were used to produce models and prototype parts. Today, they are used for a much wider range of applications and are even used to manufacture production-quality parts in relatively small numbers. Some sculptors use the technology to produce exhibitions. Rapid application development (RAD) is a software development methodology that uses minimal planning in favor of rapid prototyping. The "planning" of software developed using RAD is interleaved with writing the software itself. The lack of extensive pre-planning generally allows software to be written much faster, and makes it easier to change requirements. In this paper we discussed a survey of performance based advanced rapid prototyping techniques. The performance based techniques are categorized based upon different approaches. We also analysis the major improvement in recent methods advanced rapid prototyping techniques.

The fracture properties like fracture toughness and nominal strength of glass fiber reinforced epoxy laminates are very important especially when using cohesive zone model. Compact tension specimen test for [0, 90]2sand center cracked specimen tension test for Quasi-isotropic laminates [0/45/90]2s and [0/45/90/-45]sare carried out. The open hole tension test is performed on a matrix of specimen of various diameters (2, 4, 6, 8 and 10 mm) keeping the hole diameter to width (d/w) equal 1/6. The fracture toughness of cross ply laminates is measured as 51.98 Kj/m2whereas, for Quasiisotropic laminates [0/45/90] 2s and [0/45/90/-45]s are 32.98 and 31.5 KJ/m2 respectively. A strength reduction of 32 % is observed with increasing the hole diameter from 2 mm to 10 mm, while this percentage was decreasing by inserting an angle ply as 26 % for [0/45/90]2sand 14 % for [0/45/90/-45]s. Delamination are observed with thickness increasing for un-notched specimens. Fiber orientation affects deeply the laminates carrying capacity

The pulsatile flow of blood through a mild stenosed artery under periodic body acceleration is investigated in this theoretical analysis. The Casson fluid model of blood and the presence of slip (velocity discontinuity) at the flow boundaries (stenosed vessel walls) are given due consideration in the analysis. The geometry of the stenosis to be manifested in the arterial segment is assumed to be an axisymmetric surface generated by a smooth cosine curve. On using perturbation technique, the flow velocity u is expanded in terms of the Womersley frequency parameter α2 (where α2<< 1) and analytic expressions for velocity profile, flow rate, wall shear stress and effective viscosity are derived. An extensive quantitative analysis is carried out by performing large scale numerical computations of the above flow variables having physiological significance. The diagrammatic representation of the flow variables with the change of parameters are given with scientific discussion. Finally comparisons are made with the other existing results to justify the applicability of the model

Bangladesh is a region where abundant amount of rattan (or cane) is available of different types. This paper attempts to understand several properties of Zali bet (Calamus guruba). It is easily available in many parts of Bangladesh. All the rattan samples used in this study were collected from minimum three years old trees. These samples were used to find the Ultimate Tensile Strength (UTS), Yield Strength (YS), Modulus of Elasticity (MoE) and Bond Strength (BS) with concrete. Pull-out test was done to have an idea about the Bond Strength of rattan with concrete. Here three types of specimens were prepared to investigate the relative performance. Each type includes two specimens. Pull out test of steel was also made to report comparison. From the result of laboratory work Zali bet offered some prospective data which can be utilized as the preliminary reference for the future works related to it.

The proposed work deals with data hiding in compressed video. Unlike data hiding in images and raw video which operates on the images themselves in the spatial or transformed domain which are vulnerable to steganalysis, we target the motion vectors used to encode and reconstruct both the forward predictive (P)-frame and bidirectional (B)- frames in compressed video. The choice of candidate subset of these motion vectors are based on their associated macro block prediction error, which is different from the approaches based on the motion vector attributes such as the magnitude and phase angle, etc. A greedy adaptive threshold is searched for every frame to achieve robustness while maintaining a low prediction error level. The secret message bit stream is embedded in the least significant bit of both components of the candidate motion vectors. The method is implemented and tested for hiding data in natural sequences of multiple groups of pictures and the results are evaluated. The evaluation is based on two criteria: minimum distortion to the reconstructed video and minimum overhead on the compressed video size. Based on the aforementioned criteria, the proposed method is found to perform well and is compared to a motion vector attribute-based method from the literature.