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Because psychology systematically explores human judgment, behavior, and well-being, it can teach us important facts about how humans differ from traditional economic assumptions. In this essay I discuss a selection of psychological findings relevant to economics. Standard economics assumes that each person has stable, well-defined preferences, and that she(More)
—In a multi-hop wireless sensor network (WSN) with a constant node density, the nodes that are one hop away from the Sink die first and cause an " energy hole, " because they must forward the traffic from the rest of the network. When this hole forms, a large amount of " excess " energy is trapped in the other nodes. In this paper, we propose that some of(More)
—Theoretically optimal performance and behavior of a routing protocol are very important because they can be used to guide the design of practical protocols. Motivated by the promising lifetime performance of an existing suboptimal cooperative transmission (CT) routing protocol for wireless sensor networks, we formulate the lifetime-optimization problem(More)
Range extension is a promising feature offered by cooperative transmission (CT), also known as virtual multiple-input–single-output (VMISO). Many authors have considered how the diversity and array gains from CT may benefit a wireless multi-hop network, when the gains are used for increasing link reliability and reducing transmit power. However, relatively(More)
—The total energy consumed by the radios is compared for a cooperative transmission (CT) protocol and a non-CT routing protocol, in a two-hop, single cluster, ad hoc network. The radio energy model is a function of parameter sets that are typically found in radio specifications. The protocols are compared for five different parameter sets, corresponding to(More)
—In this paper, we discuss how cooperative transmission (CT) can provide better services and/or lower the initial cost compared to non-CT in wireless sensor networks. To see the performance of CT and non-CT in both battery operated and energy harvesting networks, we look at the duty cycle instead of the energy and convert the conventional non-CT and CT(More)
ACKNOWLEDGMENTS My half a decade in Georgia Tech was the most precious and valuable time in my life. This dissertation is the result of not only countless nights to roll carts out, but also unconditional support from my beloved wife and daughter. I wouldn't have been able to stand here without their love and sacrifice. Numerous people have helped and(More)
BACKGROUND Ubiquitination is an important post-translational modification involved in diverse biological processes. Therefore, genomewide representation of the ubiquitination system for a species is important. DESCRIPTION SCUD is a web-based database for the ubiquitination system in Saccharomyces cerevisiae (Baker's yeast). We first searched for all the(More)
Recently, much attention has focused on replacement or/and enhancement of biological tissues via the use of cell-laden hydrogel scaffolds with an architecture that mimics the tissue matrix, and with the desired three-dimensional (3D) external geometry. However, mimicking the heterogeneous tissues that most organs and tissues are formed of is challenging.(More)
We used indirect stereolithography (SL) to form inner-layered fluidic networks in a porous scaffold by introducing a hydrogel barrier on the luminal surface, then seeded the networks separately with human umbilical vein endothelial cells and human lung fibroblasts to form a tissue mimic containing vascular networks. The artificial vascular networks provided(More)