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Optimizing Multi-copy Two-hop Routing in Mobile Social Networks
No full textIn this paper, an opportunistic multi-copy two-hop routing algorithm is proposed for mobile social networks (MSNs) to minimize the expected data delivery delay, using local information. For each source-destination pair, the source dynamically maintains a forwarding set consisting of relay nodes. The forwarding set selection is based on the number of remaining message copies, as well as the number and quality of relays that have not received a message copy. The source only forwards its message to the relay nodes in its forwarding set, which will in turn forward the message to the destination directly. We propose a greedy approach to select the forwarding set with n message copies at the source, in an MSN with m (m\u3en) relays. All forwarding sets can be determined with a time complexity of O(m log m+nm). Then, the proposed multi-copy two-hop routing algorithm is applied to a feature space routing scheme, where the contact frequencies are estimated by social feature distances. Finally, the competitive performance of the proposed schemes are shown in real trace-driven simulations
Biomechanical Performance of Variable and Fixed Angle Locked Volar Plates for the Dorsally Comminuted Distal Radius
Get PDFBackground The ideal treatment strategy for the dorsally comminuted distal radius fracture continues to evolve. Newer plate designs allow for variable axis screw placement while maintaining the advantages of locked technology. The purpose of this study is to compare the biomechanical properties of one variable axis plate with two traditional locked constructs. Methods Simulated fractures were created via a distal 1 cm dorsal wedge osteotomy in radius bone analogs. The analogs were of low stiffness and rigidity to create a worst-case strength condition for the subject radius plates. This fracture-gap model was fixated using one of three different locked volar distal radius plates: a variable axis plate (Stryker VariAx) or fixed axis (DePuy DVR, Smith & Nephew Peri-Loc) designs. The constructs were then tested at physiologic loading levels in axial compression and bending (dorsal and volar) modes. Construct stiffness was assessed by fracture gap motion during the different loading conditions. As a within-study control, intact bone analogs were similarly tested. Results All plated constructs were significantly less stiff than the intact control bone models in all loading modes (p\u3c0.040). Amongst the plated constructs, the VariAx was stiffest axially (p=0.032) and the Peri-Loc was stiffest in bending (p\u3c0.024). Conclusion In this analog bone fracture gap model, the variable axis locking technology was stiffer in axial compression than other plates, though less stiff in bending
Business 2.0: Bachelor\u27s of Science in Business Administration
No full textThe University Curriculum Committee has carefully reviewed a proposal from the Department of Business to make sweeping changes to the BSBA degree program. We unanimously recommend that the Faculty Senate submit these proposed changes (entitled Business 2.0) to the Provost for final approval. This is the second set of sweeping changes to the BSBA degree program. Business 1.0 was approved last year with the intention of Business 2.0 being submitted this year. Please note that many of the detailed proposals have a different format based on accreditation requirements (non-ABET). These formatting issues should be fixed with future UCC Plans the first of which are now on the website
