EXPERIMENTAL STUDY OF TRIBOLOGICAL BEHAVIOR OF ALUMINUM OXIDE(Al2O3)USING PIN-ON-DISC WEAR TESTING APPARATUS

Aluminium oxide ceramics have a good thermal conductivity, high strength and stiffness, low coefficient of expansion, these major properties made them adopt in the critical structural designs of aerospace and in advanced machinery. Ceramics is having wide applications in all the structural designs and developments, because of its properties like higher density, hardness, resistance to corrosion and it can stand with very high temperatures. Ceramics is mainly used as reinforcement with aluminium oxide in order to enhance its stiffness and strength. The particles of ceramics can easily combine with aluminium oxide (Al2O3) and it gives an identical property throughout the composite material.

Experimental investigation on strength properties of concrete using polypropylene pellets

The revolution of using new materials as reinforcement in concrete has become all the rage. It is due to the fact that he habitual construction materials we generally use, decreases in quantity on regular basis. Thus there arises a vacuum to replace those habitual materials with the resources of identical property. The good quality river sand has now become a demand because of its scarcity. Thus replacing the conventional river sand with M-Sand (manufactured sand) will reduce this demand. In turn the M sand is readily available at the time of need. M-Sand is of the disposal of plastic waste materials such as polythene bags, water bottle etc., may cause environmental damage. Polypropylene is the second most widely produced synthetic plastic after polyethylene. The usage of polypropylene in concrete will improve its mechanical properties. In this project, M-Sand has been partially replaced by POLYPROPYLENE in the form of plastic pellets in range of (0-30% at the interval of 10%) in M-20 grade of concrete. The concrete has been tested for compressive strength, split-tensile strength and flexural strength for 28 days.

Decomposing complex serialization

This paper investigates the role of merger and the typology of v in the syntax of Serial Verb Constructions (SVCs) in Korean. Some SVCs with a derivational suffix (e.g. a causative/passive v) in Korean display distinct behavior from the others. We argue that this is due to different syntactic structures among SVCs and that SVCs in Korean must be divided into two sub-types: H(igh)-SVC and L(ow)-SVC. Specifically, we propose that different types of SVCs result from different merger sites of the derivational v head. An H-SVC results when a causative or passive v head is merged to a verb before it is serialized with another verb; an L-SVC results when verbal serialization occurs prior to the merger of the derivational v head. We then turn our attention to a condition on verbal serialization, and propose that verbs can be serialized only when their v heads bear the specific identical property of introducing an external argument. We show that our matching condition coupled with the proposed dichotomy of SVCs has broader empirical coverage than the previous analyses. Theoretically, our study supports the claim that the morphology and the syntax are intertwined so that the attachment site of derivational suffixes may vary in syntax. Our argument also provides novel support for the finer-grained classification of v heads.

The Research of an Abstract Semantic Framework for Defect Detecting

This paper proposes a non-relational abstract semantic framework. It uses interval set to represent the value of numerical variables and complete lattice to represent Boolean variables and reference variables. It presents the abstract computation method of basic expressions and the nodes of control flow graph. It uses function summaries to represent the context information of function call needed by defects detecting. Based on the results of abstract computation, it uses extended state machine to define defect patterns and proposes a path-sensitive method based on dataflow analysis to detect defects. It avoids the combination explosion of full path analysis by merging the conditions of identical property state at join points in the CFG. Practical test results show that the proposed methods have features of high efficiency, low false positive and low false negative.