volume 6 ~ issue 7

In the present study the heat transfer capacity of the micro pulsating heat pipes. The fundamentals of working of the Micro Pulsating Heat pipes (MPHP) are explained. The micro pulsating heat pipes having channel diameter 800μm and different number of turns have been designed. These MPHPs are filled with water. Different numbers of turns have been designed. Different filling ratios i.e. 30%, 50%, 70% have been selected for the MPHPs. On each case a constant heat flux of 1000W/m2has been applied. The heat transfer rate is found out in each case and compared to find out the optimum case. All the simulation work has been carried out in Ansys Fluent.

Keywords - Micro pulsating Heat Pipe, Filling ratio, Critical Diameter, Heat Transfer rate, Thermal analysis of heat pipe, Volume Fraction.

A power system is set up basically to meet the demands of the customers. However, interruptions which are largely unavoidable contribute to the unavailability of power and thus prevent power system from achieving this. In most cases, it is the sustained interruptions that greatly affect both the utility company and its customers. Hence, it is necessary to find means of determining which component failure contributes most to the unavailability of the distribution system, and how this unavailability actually affects the customers. This is to enable system planners and designers to seek better ways of improving the reliability of a typical secondary distribution substation system having a single-end fed radial configuration........

Keywords - Interruptions, Unavailability, Component failure, Reliability indices, Distribution system.

Friction welding method is one of the most simple, economical and highly productive method in joining in similar and dissimilar metal. It is widely used in automotive, aircraft and aerospace industrial application. Ceramic metal bonding is the one of the biggest challenge that have faced manufacturers and users over the years because of the inherent differences in the thermal expansion coefficient of the two types of materials. In the present work a ceramic component of AL2o3-YSZ was friction welded to 6061 al alloy. Alumina rods containing 0 and 25 wt % yttira stabilized zirconia were fabricated by slip casting in plaster of Paris molds and subsequently sintered at 1600 centigrade on the hand the aluminum rods were machine down using a lathe machine to the dimension required.........

Keywords - Friction welding; mechanical properties; ceramic; alumina; zirconia; aluminum; alloy;6061

Electrochemical machining (ECM) is one of the important non-traditional machining processes, which is used formachining difficult-to-cut materials and complicated shapes or special structure. In this work, taking grooves in inner cylinder for lightweightas the research objective, the simulation in certain condition was done to study the effect of parameters such as width of inlet slot, inlet pressure and machining inter-electrode gap on flow field characteristics of machining surface. Then analysis of the results was carried on, and the results showed that larger.........

Keywords - Electrochemical Machining (ECM); Flow Fields; Computational Fluid Dynamics (CFD); Groove

This article deals with the problem of the position of human labor in modern life. The development of society at this stage implies an exchange relationship. First of all, they are connected with the determination of the value of the products of labor in circulation. Under cost measurements, along with all the capital, the person gets himself. Therefore, the spiritual and creative aspect is lost in the life of man and society. This trend shifts to labor relations and the work of man himself..........

Keywords - Man, work, spiritual and creative aspect, value, capital, form.

Amorphous thermoplastic polymers require a great interest thanks to their important industrial applications. This importance is reflected in many studies about their mechanical responses. Acrylonitrile butadiene styrene (ABS) has seen significant industrial development as a result of its proprieties: good heat resistance, high impact resistance, rigidity, and its dimensional stability. The combination of the three monomers that constitute it from different chemical and physical proprieties, provides a material of interest with higher performance. This work consists in studying the mechanical behavior of ABS subjected to uni-axial loading, using a statistical study based on two methods: Student distribution and Weibull distribution.

Keywords - ABS; Polymers; Statistics, Student; Weibull.

Kampung Improvement Program is still a priority because the majority of big cities in Indonesia are still dominated by informal settlements (kampung). Surabaya as the object of this research is one of the big cities that have a long history in the implementation of Kampung Improvement Program. However, there is no study that describes the periodization of Kampung Improvement Program development comprehensively. Therefore, this study aims to record the experience of Kampung Improvement Program in Surabaya comprehensively. This research used post-positivism paradigm with historical research strategy. Data collection was done by literature review and in-depth interview using qualitative descriptive analysis technique and triangulation. The result of this study is the period of Kampung Improvement Program development in Surabaya.

Keywords - Kampung Improvement Program, Surabaya City, periodization of development

Queue is an abstract data structure is based on the rule of FIFO. Queue is used to insert and delete element in a proper sequence. In computer science it works as a CPU scheduling in an operating system as well as in real life on railway reservation counter and at a ticket counter of multiplex. Each of this show that element moved from their respective position while deletion occur, but the concept of queue shows that move front pointer to the position to delete an element. In this paper eliminate the operation of deleting an element at their respective position, explore the benefit to move the elements toward the starting positions of queue for further operation and also eliminate the constraint of overflow condition in the case when queue is full and remove first element and again try to insert next element into the queue.

Keywords - Dequeue, Enqueue,Front, Overflow, Rear,Underflow.

Diamond-like carbon (DLC) is a hard material with lubricity and chemical stability. Amid the growing awareness of environmental problems in late years, DLC films have been used to reduce the fuel consumption of automobiles by reducing friction loss. This study diamond-like-carbon (DLC) coating process was applied to 8620 H steel used for camshaft production. Coatings are only applied to cams on the camshaft. SEM analysis were made by taking sections from the cams and abrasion amount were measured at different distances. Coated samples were compared with uncoated samples. DLC coated cam surfaces improved, the amount of wear has been reduced.

Keywords - Diamond-like carbon, 8620H Steel , Coating, Wear, Friction.

Different types of information are used in studying the genetic and economic characteristics of mineral resources, including geological and mathematical and economic-mathematical information of particular importance. Geological-mathematical informations and models allow both systematic and complete study on mineral deposits per all elements of a complex genetical model of mineral deposits, and economic-mathematical information according to the geological-economic model of mineral deposits. In the work with genetic studies it is of particular importance to participate in the interpretation of the conditions and the way of becoming, quantification and functional expression of parameters of the ore process and spatial localization of mineral products.............

Keywords - Geological-mathematical information, geological-economic evaluation, mineral deposit, mineral economy.