Arman Rezaee

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The views expressed in the HKS Faculty Research Working Paper Series are those of the author(s) and do not necessarily reflect those of the John F. Kennedy School of Government or of Harvard University. Faculty Research Working Papers have not undergone formal review and approval. Such papers are included in this series to elicit feedback and to encourage(More)
In this paper a low pass microwave filter has been designed. The filter has designed by step impedance method in which the alternative part characteristic linear impedance is too high or too low design. In this filter with changing every high or low impedance characteristics such as length or width desired characteristics can be rich and it has stimulated(More)
We present a novel feedback protocol for wireless broadcast networks that utilize linear network coding. We consider transmission of packets from one source to many receivers over a single-hop broadcast erasure channel. Our method utilizes a predictive model to request feedback only when the probability that all receivers have completed decoding is(More)
We introduce a novel feedback protocol, called SMART, for wireless broadcast networks that use linear network coding. We consider transmission of packets from a single source to many receivers over a single-hop broadcast erasure channel with heterogeneous links. We propose a predictive model to minimize feedback as well as extraneous data transmissions by(More)
Institutional performance is thought to be a key determinant of economic success, however there is little evidence on how best to reform existing institutions. Foreign aid donors spend substantial resources on ―community driven development‖ programs that combine the provision of public goods with intensive long term facilitation designed to strengthen local(More)
We develop and implement a novel, mobile phone-based information clearinghouse, and experimentally evaluate its ability to overcome information asymmetries and improve public service delivery to farmers in Punjab, Pakistan. Like many crowdsourcing websites, our clearinghouse collects and disseminates ratings—here, on the success of government veterinarians(More)
Acknowledgements: The study was approved by the UCSD IRB (Project #110178XX). The authors gratefully acknowledge the generous funding provided by the National Science Foundation (award #1118589). We thank and the anonymous reviewers for their insightful comments. Any opinions, findings, and conclusions or recommendations expressed in this publication are(More)
In this thesis, we address the combination of three technologies in wireless broadcast networks: network coding, multi-packet reception (MPR) and feedback. We will primarily discuss the performance of a single-hop network, both with and without these technologies. A single-hop network can be used as a building block for larger and more topologically diverse(More)