The Capacity Region of Restricted Multi-Way Relay Channels with Deterministic Uplinks

This paper considers the multi-way relay channel (MWRC) where multiple users exchange messages via a single relay. The capacity region is derived for a special class of MWRCs where (i) the uplink and the downlink are separated in the sense that there is no direct user-to-user links, (ii) the channel is restricted in the sense that each user's transmitted channel symbols can depend on only its own message, but not on its received channel symbols, and (iii) the uplink is any deterministic function.Comment: Author's final version (to be presented at ISIT 2012

Research and the Bottom Line in Today’s University

Citing examples of corporate involvement in university research and decision making, the authors argue that today’s university is characterized by a web of symbiotic relationships which may turn them away from other important priorities, particularly teaching. When universities are scrambling for corporate support, the missions that become most important are conducting research that attracts corporate sponsors, developing marketable products and technologies, maintaining and cultivating ties with the private sector, and fashioning imaginative partnerships with corporate patrons

Transparency in Communication: An Examination of Communication Journals’ Conflicts-of-Interest Policies

Increased corporate-sponsored university research and professorial consulting has caused medical, psychological, and other scientific journals to adopt conflicts-of-interest disclosure policies. This study examines editorial policies concerning conflicts of interest at communication journals in the context of Habermas’s theory of communicative action. The results show that communication journals do not have the same mandatory disclosure requirements that journals of other disciplines have. In this regard, communication research journals are similar to the mass media. Consequently, the article suggests that disclosure policies are needed if communication research journals are to function as part of a larger dialogic process. Moreover, communication researchers are not in a position to criticize the mass media for failing to disclose conflicts of interest when their own journals do not require disclosure

The Capacity Region of the Restricted Two-Way Relay Channel with Any Deterministic Uplink

This paper considers the two-way relay channel (TWRC) where two users communicate via a relay. For the restricted TWRC where the uplink from the users to the relay is any deterministic function and the downlink from the relay to the users is any arbitrary channel, the capacity region is obtained. The TWRC considered is restricted in the sense that each user can only transmit a function of its message.Comment: author's final version (accepted and to appear in IEEE Communications Letters

The Untapped Power of Soda Taxes: Incentivizing Consumers, Generating Revenue, and Altering Corporate Behavior

Globally, soda taxes are gaining momentum as powerful interventions to discourage sugar consumption and thereby reduce the growing burden of obesity and non-communicable diseases (NCDs). Evidence from early adopters including Mexico and Berkeley, California, confirms that soda taxes can disincentivize consumption through price increases and raise revenue to support government programs. The United Kingdom’s new graduated levy on sweetened beverages is yielding yet another powerful impact: soda manufacturers are reformulating their beverages to significantly reduce the sugar content. Product reformulation – whether incentivized or mandatory – helps reduce overconsumption of sugars at the societal level, moving away from the long-standing notion of individual responsibility in favor of collective strategies to promote health. But as a matter of health equity, soda product reformulation should occur globally, especially in low- and middleincome countries (LMICs), which are increasingly targeted as emerging markets for soda and junk food and are disproportionately impacted by NCDs. As global momentum for sugar reduction increases, governments and public health advocates should harness the power of soda taxes to tackle the economic, social, and informational drivers of soda consumption, driving improvements in food environments and the public’s health

The Capacity of Three-Receiver AWGN Broadcast Channels with Receiver Message Side Information

This paper investigates the capacity region of three-receiver AWGN broadcast channels where the receivers (i) have private-message requests and (ii) know the messages requested by some other receivers as side information. We classify these channels based on their side information into eight groups, and construct different transmission schemes for the groups. For six groups, we characterize the capacity region, and show that it improves both the best known inner and outer bounds. For the remaining two groups, we improve the best known inner bound by using side information during channel decoding at the receivers.Comment: This is an extended version of the same-titled paper submitted to IEEE International Symposium on Information Theory (ISIT) 201

Generalized Interlinked Cycle Cover for Index Coding

A source coding problem over a noiseless broadcast channel where the source is pre-informed about the contents of the cache of all receivers, is an index coding problem. Furthermore, if each message is requested by one receiver, then we call this an index coding problem with a unicast message setting. This problem can be represented by a directed graph. In this paper, we first define a structure (we call generalized interlinked cycles (GIC)) in directed graphs. A GIC consists of cycles which are interlinked in some manner (i.e., not disjoint), and it turns out that the GIC is a generalization of cliques and cycles. We then propose a simple scalar linear encoding scheme with linear time encoding complexity. This scheme exploits GICs in the digraph. We prove that our scheme is optimal for a class of digraphs with message packets of any length. Moreover, we show that our scheme can outperform existing techniques, e.g., partial clique cover, local chromatic number, composite-coding, and interlinked cycle cover.Comment: Extended version of the paper which is to be presented at the IEEE Information Theory Workshop (ITW), 2015 Jej

Sustain Arts/SE Michigan: A Portrait of the Cultural Ecosystem

This report discusses the potential use of data in arts organizations for strategic purposes. Data currently available on the cultural sector can lead to useful insights about the increasing proliferation of small arts organizations; the almost monolithic focus of private foundations on supporting a highly select group of large, well-established arts organizations; and the fact that established arts organizations are poorly positioned to satisfy emerging consumer preferences for cultural experiences. Such insights should provoke frank discussion and galvanize field leaders to advocate appropriate actions, both in response to existing disconnects and proactively, in anticipation of coming change. The data that are now available to the field are not perfect. In fact, that's part of the story that needs to be told about the cultural sector. Systematic data collection on artists, cultural organizations, and audiences receives only a token amount of government funding. Instead, it is left largely up to private organizations to document trends in both the nonprofit and for-profit cultural arenas. This leads to multiple non-overlapping data collection strategies, making it difficult to construct a coherent picture of the field. There are gaping holes in the puzzle, and the tales we tell with existing data must be told with caution