Maximum Likelihood Decoder for Index Coded PSK Modulation for Priority Ordered Receivers

Index coded PSK modulation over an AWGN broadcast channel, for a given index coding problem (ICP) is studied. For a chosen index code and an arbitrary mapping (of broadcast vectors to PSK signal points), we have derived a decision rule for the maximum likelihood (ML) decoder. The message error performance of a receiver at high SNR is characterized by a parameter called PSK Index Coding Gain (PSK-ICG). The PSK-ICG of a receiver is determined by a metric called minimum inter-set distance. For a given ICP with an order of priority among the receivers, and a chosen $2^N$-PSK constellation we propose an algorithm to find (index code, mapping) pairs, each of which gives the best performance in terms of PSK-ICG of the receivers. No other pair of index code (of length $N$ with $2^N$ broadcast vectors) and mapping can give a better PSK-ICG for the highest priority receiver. Also, given that the highest priority receiver achieves its best performance, the next highest priority receiver achieves its maximum gain possible and so on in the specified order or priority.Comment: 9 pages, 6 figures and 2 table

Employer-Sponsored Health Insurance: Down, But Not Out

Presents findings from twelve metropolitan areas about employers' efforts to control employee healthcare costs in response to the recession and national healthcare reform by firm size. Projects employer trends through 2014, including greater cost sharing

Got water? Social divisions and access to public goods in rural India

We use data for 436 rural districts from the 2001 Census of India to examine whether different aspects of social divisions help explain the wide variation in access to tap water across rural India. Studies linking social fragmentation to public goods usually aggregate different types of fragmentation into one index. In contrast, we use disaggregated measures of social fragmentation to show that different types of social fragmentation are associated with dramatically different outcomes for access to tap water in rural India. Communities that are heterogeneous in terms of caste (within the majority Hindu religion) have lower access to tap water than correspondingly homogeneous communities. Communities that are fragmented across religions have higher access to tap water than correspondingly homogeneous communities. This underscores the importance of heterogeneity both within and across religions. Therefore, relying on aggregate measures of social fragmentation may conceal different effects of the component measures and obscure important information regarding the design of policies related to public goods

HIF- and Non-HIF-Regulated Hypoxic Responses Require the Estrogen-Related Receptor in Drosophila melanogaster

Low-oxygen tolerance is supported by an adaptive response that includes a coordinate shift in metabolism and the activation of a transcriptional program that is driven by the hypoxia-inducible factor (HIF) pathway. The precise contribution of HIF-1a in the adaptive response, however, has not been determined. Here, we investigate how HIF influences hypoxic adaptation throughout Drosophila melanogaster development. We find that hypoxic-induced transcriptional changes are comprised of HIF-dependent and HIF-independent pathways that are distinct and separable. We show that normoxic set-points of carbohydrate metabolites are significantly altered in sima mutants and that these animals are unable to mobilize glycogen in hypoxia. Furthermore, we find that the estrogen-related receptor (dERR), which is a global regulator of aerobic glycolysis in larvae, is required for a competent hypoxic response. dERR binds to dHIFa and participates in the HIF-dependent transcriptional program in hypoxia. In addition, dERR acts in the absence of dHIFa in hypoxia and a significant portion of HIF-independent transcriptional responses can be attributed to dERR actions, including upregulation of glycolytic transcripts. These results indicate that competent hypoxic responses arise from complex interactions between HIF-dependent and -independent mechanisms, and that dERR plays a central role in both of these programs

Techniques for Assessing the Socio-Economic Effects of Vehicle Mileage Fees

This project considers the socio-economic impacts of the new highway user fee structure made possible by advanced technology. The fee structure also has implications for land use and healthy communities ( urban/rural, income distributional, and environmental impacts). The 2001 Oregon Legislature created the Road User Fee Task Force (RUFTF) to make recommendations regarding a potential replacement for the gasoline tax. A vehicle mile tax has subsequently been proposed as the replacement. Preliminary work has been devoted to exploring technical and institutional options for implementation of such a charge. OSU researchers have developed the technology and there is a pilot project in progress in the Portland area that tests charging vehicle mile road user fees using this technololgy. Media feedback on the proposed vehicle-mile tax has focused on 1) the possible (dis) incentives it could provide to the adoption of more fuel efficient vehicles 2) how the tax may unevenly impact drivers in urban versus rural Oregon, and 3) whether the change in tax structure will have an adverse impact on low income groups. The purpose of this study is to develop a model which provides an analytical framework from which to quantify the impact of changing to the proposed vehicle-mile tax. ODOT will use the results from this study to help formulate the specific form of the vehicle-mile tax (flat tax, a graduated tax, a higher tax for less fuel efficient vehicles, a differential tax for urban/rural areas, etc.). Perhaps just as important is the fact that ODOT needs some quantitative information on the socio-economic impact of such a tax, to use in public relations. A huge factor in determining the ultimate adoption of such a tax structure will be the public acceptance of this change and, in turn, they need to have full information on what it will do. Given the decreasing ability of the gasoline tax to cover the costs of the highway system, an alternative financing scheme is necessary to insure future mobility. There are also implications for environmental stewardship as a vehicle-mile tax has also been suggested as an emissions tax. Finally, once the technology is in place for a vehicle-mile tax, it becomes possible to implement a vehicle-mile tax that may vary by time of day and location, providing an efficient congestion pricing tool. The FHWA has five focus areas for policy research as listed in USDOT, Research, Development, and Technology Plan, 6th edition, FY 2005. One is developing analytical tools to evaluate the impacts of a broad range of highway policy options (p. 4-12). Under Future Direction in Highway Finance: to examine the long-term viability of existing highway financing mechanisms and explore issues relating to alternatives, including the future role of the private sector in providing and managing transportation resources. And under Legislative Analysis and Strategic Planning: Support the development, analysis, and implementation of transportation legislation and address strategic initiatives that are likely to influence future legislative and political directions. Thus, this project is consistent with national and state transportation strategies and priorities

Dimensionally stable and bioactive membrane for guided bone regeneration: An in vitro study

Composite fibrous electrospun membranes based on poly(dl-lactide) (PLA) and poly(ε-caprolactone) (PCL) were engineered to include borate bioactive glass (BBG) for the potential purposes of guided bone regeneration (GBR). The fibers were characterized using scanning and transmission electron microscopies, which respectively confirmed the submicron fibrous arrangement of the membranes and the successful incorporation of BBG particles. Selected mechanical properties of the membranes were evaluated using the suture pullout test. The addition of BBG at 10 wt % led to similar stiffness, but more importantly, it led to a significantly stronger (2.37 ± 0.51 N mm) membrane when compared with the commercially available Epiguide® (1.06 ± 0.24 N mm) under hydrated conditions. Stability (shrinkage) was determined after incubation in a phosphate buffer solution from 24 h up to 9 days. The dimensional stability of the PLA:PCL-based membranes with or without BBG incorporation (10.07-16.08%) was similar to that of Epiguide (14.28%). Cell proliferation assays demonstrated a higher rate of preosteoblasts proliferation on BBG-containing membranes (6.4-fold) over BBG-free membranes (4- to 5.8-fold) and EpiGuide (4.5-fold), following 7 days of in vitro culture. Collectively, our results demonstrated the ability to synthesize, via electrospinning, stable, polymer-based submicron fibrous BBG-containing membranes capable of sustaining osteoblastic attachment and proliferation-a promising attribute in GBR

Wealth from waste-utilisation of fish waste for production of biogas

A biogas unit was installed in the premises of Mangalore Research Centre of CMFRI during November, 2016 in order to utilize the fish waste generated from the biological analysis done in the lab. This biogas unit installed is first of its kind in the state to utilize fish waste. A unit was installed gainfully utilizing the fish waste generated after the biological analysis of fish. Disposal of the fish waste generated periodically at the Research Centre during sampling made for biological studies was becoming difficult. However, with the installation of the biogas unit- designed and supplied by private manufacturer in Kerala, solved the disposal problem of fish waste

Real-Time Adaptive Event Detection in Astronomical Data Streams

A new generation of observational science instruments is dramatically increasing collected data volumes in a range of fields. These instruments include the Square Kilometer Array (SKA), Large Synoptic Survey Telescope (LSST), terrestrial sensor networks, and NASA satellites participating in "decadal survey"' missions. Their unprecedented coverage and sensitivity will likely reveal wholly new categories of unexpected and transient events. Commensal methods passively analyze these data streams, recognizing anomalous events of scientific interest and reacting in real time. Here, the authors report on a case example: Very Long Baseline Array Fast Transients Experiment (V-FASTR), an ongoing commensal experiment at the Very Long Baseline Array (VLBA) that uses online adaptive pattern recognition to search for anomalous fast radio transients. V-FASTR triages a millisecond-resolution stream of data and promotes candidate anomalies for further offline analysis. It tunes detection parameters in real time, injecting synthetic events to continually retrain itself for optimum performance. This self-tuning approach retains sensitivity to weak signals while adapting to changing instrument configurations and noise conditions. The system has operated since July 2011, making it the longest-running real-time commensal radio transient experiment to date