NUST Institutions Library Catalogue Search for 'an:"119500"'

Cell Sorting & Cell Counting Using Passive Microfluidic Devices /

By Mansoor Ud Din, Muhammad . . 47p. 30cm.

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Smart Concrete Extruder Design and Prototyping /

By Umais Qamar, Muhammad . . 66p. ; 30cm..

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Comparison of measured drive torque and average friction torque at cam/follower interface for various commercially available engine oils of the same SAE rating (10W-40) /

By Jamal, Naseh . . 38p. , In recent times, automobile scientists have focused a lot upon the fuel economy and energy conservation in motor vehicles. The search for alternate fuels and the minimization of thermal and mechanical losses in motor engines has been a major topic of research for the past several decades. In an automobile, one of the most complicated systems in terms of mechanical losses is the engine valve train. Several theoretical and experimental models have been used to calculate the losses in engine valve train and the effect of various engine parameters on the frictional losses. The work presented in this article focuses upon the drive and friction torque values for four different commercially available oils of the same grade i.e., 10W-40. These oils are Shell, Castrol, Kixx and ZIC. The tests are carried out on a Suzuki swift RS413 gasoline engine cylinder head. The variation in drive and friction torques with oil temperature and camshaft speed is presented. The results show the comparisons of these four oils for the drive and friction torque values and based on these results, conclusions are given regarding the best oil in terms of friction performance of the given engine valve train. It is thus concluded in this thesis that Kixx is the oil with the least value of average friction torque for the given experimental conditions and is therefore the best one among the four oils compared. 30cm.

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Design of control system and fabrication of special compartment in Static Refrigerators /

By Arshad, Muhammad Bilal . . 54p. , Refrigerators being used for domestic purposes are of three types, namely static, brewed, and no-frost. The aim of this project was to introduce a new compartment in static refrigerators to enhance the quality and freshness of food present in this compartment. It was achieved by having control over temperature depending on the needs of the user and needs for the type of food inside the compartment. There can be two methods to fabricate this special compartment. One is by using parallel evaporators and other is by using fan and airduct. The parallel evaporator method is expensive but highly efficient, while air duct is less expensive and does not compromise enough efficiency, in term of energy consumption and cooling. The airduct was implanted in the refrigerator and results were taken. The result shows the total time to reach the target temperature, and time to drop per half degree of temperature. The target was to set the temperature at any value between 5 to -5 oC. In this project, the minimum temperature achieved was -1 oC, as the average temperature of evaporator goes to -12 oC, rather than the - 18 oC for most of the domestic refrigerators. 30cm.

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Experimental Study of Multi-cell Counting Based on Inertial Microfluidic Devices /

By Manshad, Muhammad Danish. . 49p. , In the field of biomedical, a cell counting device is used for the counting of cells or microparticles for the treatment of different kinds of diseases. The research based on the inertial flow microfluidic focused cell counting. The aim of study is to design and development of a low-cost microfluidic counting device for counting of particles in a focused microchannel. The counting of particles is independent of size, device can be count for different sizes. Using fluorescent microscope and AM Scope the image-based counting has been done at different sized microchannels. Which were fabricated using 3d printed mold and PDMS pouring on the mold. PDMS and Glass slide is bonded using plasma bonding. In the research work, comparison between two scopes have been verified at two different particles solution ratio. The image-based counting has been done by taking videos from the scope’s cameras. The particles counting validated by counting the particles using a commercial device Hemocytometer. Results from both the scopes are mainly same, the counting from any of scope can be done and it can be done on mobile phone in future as the results are almost same for both the cases. There were three channel sizes and four different flow rates on which the experiment performed. The experiment performed in a clean room, which shows that the device having least dimension is best for counting microparticles. Also, the counting depends on the flow rate of the solution because increasing the flow rate decrease in total count of microparticles. It can used in lab tests for medical diagnostics, can be portable, easy to use and a low-cost device. 30cm.

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Adaptive Super Twisting Sliding Mode Formation Control of Multiple Quad-rotors with Wind Disturbances /

By Mehmood , Yasir. . 52p. ; 30cm..

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Adaptive Super Twisting Sliding Mode Formation Control of Multiple Quad-rotors with Wind Disturbances /

By Mehmood, Yasir. . 52p. ; 30cm..

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