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Pakistan has a population of over 160 million people out which nearly 30% people comprise of young boys and girls who need to select various academic majors after completion of their high school studies. Development of technologies, businesses and other fields leads to in difficulty in decision making for career selection for these youngsters. Present research is focused on evaluating the performance...
A novel pump source, generating 1 ps pulses with an envisaged pulse energy of 50 J and 10 Hz, is planned. Here we present our progress in the implementation of an existing diode-pumped Yb:YAG MOPA system as the first stages of the final PFS CPA pump laser. This CPA pump laser is seeded by a fraction of a Ti:Sa-oscillator which gets spectrally shifted in a photonic-crystal fiber. In the following zero-dispersion...
Vehicular adhoc networks are subclass of mobile adhoc network. Broadcast is a commonly used technique for communication. Different techniques are proposed for broadcast but they can't consider the importance of message except relevance based approach. Relevance based approach is the only scheme that forward relevant message for sharing and discard the surplus messages. The relevance based approach...
Admission control is an important mechanism for sustaining throughput and supporting quality of service (QoS) for real-time traffic in a wireless local area network (WLAN). In an adhoc WLAN scenario where no access point (AP) is available, admission control has to be self-managed by each node. We propose a self-restraining admission control mechanism that works by monitoring the congestion level of...
A study was conducted to assess the backward compatibility of three different lead-free BGA components using Jedec Solderability testing method (JESD22-B102D). The test was conducted at component level. The three components tested were 29??29 mm Thermally Enhanced PBGA (TePBGA-II) and 35??35mm Tape BGA (TBGA) with SAC387 and Sn3.5Ag solder balls, as well as 33??33 mm Flip Chip HiCTE BGA with only...
Solar cell simulation could be useful for time saving and cost consumption. This project discusses on the method to resolve the optical losses problem that have been hindering the totality efficiency of the photovoltaic. The different models surface texturing on GaAs solar cell have been simulated by using the VirtualWaferFab (VWF), SILVACO software in this project. It was expected that the modification...
Five different types of clean flux and no-clean flux, which are mainly used in flip chip die attach, have been analyzed in respect to the wettability of eutectic solder bump in flip chip PBGA. An experimental study is carried out to measure the spreading area of the eutectic solder bump processed with different types of flux. Various types of clean and no-clean flux are measured and placed on top...
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