Making its Mark?

The authors describe the developing picture in the law relating to trade marks, reviewing decisions made under the Trade Marks Act 1994 and looking at a number of passing off cases. Article by Paul Harris and Paul Garland of Eversheds (London)  published in Amicus Curiae - Journal of the Institute of Advanced Legal Studies and its Society for Advanced Legal Studies. The Journal is produced by the Society for Advanced Legal Studies at the Institute of Advanced Legal Studies, University of London

Reynolds number dependence of scalar fluctuations in a high Schmidt number turbulent jet

The scalar rms fluctuations in a turbulent jet were investigated experimentally, using high-resolution, laser-induced fluorescence techniques. The experiments were conducted in a high Schmidt number fluid (water), on the jet centerline, over a jet Reynolds number range of 30003000 or 6500

Perceptions of creativity amongst university design tutors

The possibility to suppress the nonperturbative effects choosing the vary high multiplicity final state is discussed. The theoretical uncertainties and the experimental observable consequence of this choice are discussed

Topicality and (Non-)Specificity in Mandarin

Current analyses of specificity are unable to provide an explanatory account for why specific and nonspecific uses of indefinites are available. While Abusch (1994), Reinhart (1997), and Kratzer (1998) provide successful mechanisms for deriving specific readings, they do not provide a fundamental explanation for the availability of this mechanism. This is due to the fact that specific indefinites are treated as involving an interpretive component or procedure unique to themselves: storage (Abusch) or choice function (Reinhart and Kratzer), for example. It would be preferable if specific indefinites could be understood as deriving from the use of independently motivated meaning components and interpretive mechanisms. Here I will pursue the idea, building on Portner & Yabushita (1998), that specificity has to do with the indefinite's interaction with a topical domain (note similarities with the proposals of Enç 1991, Cresti 1995, and Schwarzschild 2000). In this conception, specificity is a matter of degree: the narrower the topical domain, the more specific the indefinite. More precisely, sentences containing specific indefinites will be understood as involving ordinary existential quantification in combination with a topical domain function

Improving student retention and achievement: what do we know and what do we need to find out?

Why do some students in post-compulsory education abandon courses? And why do others not achieve their full potential? What can colleges do to improve student retention and achievement? This report reviews the research done to date. Research about retention and achievement is examined under headings such as student motivation and decision-making, demographic factors, college-related issues, and advice and guidance. The review refers to previously inaccessible research, including unpublished reports from conferences and internal reports from institutions. In conclusion, priorities for future research and its application are identified

Distributed Channel Synthesis

Two familiar notions of correlation are rediscovered as the extreme operating points for distributed synthesis of a discrete memoryless channel, in which a stochastic channel output is generated based on a compressed description of the channel input. Wyner's common information is the minimum description rate needed. However, when common randomness independent of the input is available, the necessary description rate reduces to Shannon's mutual information. This work characterizes the optimal trade-off between the amount of common randomness used and the required rate of description. We also include a number of related derivations, including the effect of limited local randomness, rate requirements for secrecy, applications to game theory, and new insights into common information duality. Our proof makes use of a soft covering lemma, known in the literature for its role in quantifying the resolvability of a channel. The direct proof (achievability) constructs a feasible joint distribution over all parts of the system using a soft covering, from which the behavior of the encoder and decoder is inferred, with no explicit reference to joint typicality or binning. Of auxiliary interest, this work also generalizes and strengthens this soft covering tool.Comment: To appear in IEEE Trans. on Information Theory (submitted Aug., 2012, accepted July, 2013), 26 pages, using IEEEtran.cl

Modeling Maintenance of Long-Term Potentiation in Clustered Synapses, Long-Term Memory Without Bistability

Memories are stored, at least partly, as patterns of strong synapses. Given molecular turnover, how can synapses maintain strong for the years that memories can persist? Some models postulate that biochemical bistability maintains strong synapses. However, bistability should give a bimodal distribution of synaptic strength or weight, whereas current data show unimodal distributions for weights and for a correlated variable, dendritic spine volume. Bistability of single synapses has also never been empirically demonstrated. Thus it is important for models to simulate both unimodal distributions and long-term memory persistence. Here a model is developed that connects ongoing, competing processes of synaptic growth and weakening to stochastic processes of receptor insertion and removal in dendritic spines. The model simulates long-term (in excess of 1 yr) persistence of groups of strong synapses. A unimodal weight distribution results. For stability of this distribution it proved essential to incorporate resource competition between synapses organized into small clusters. With competition, these clusters are stable for years. These simulations concur with recent data to support the clustered plasticity hypothesis, which suggests clusters, rather than single synaptic contacts, may be a fundamental unit for storage of long-term memory. The model makes empirical predictions, and may provide a framework to investigate mechanisms maintaining the balance between synaptic plasticity and stability of memory.Comment: 17 pages, 5 figure

Families of periodic Jacobi-Perron algorithms for all period lengths

For all integers $m \geq n \geq 2$, we exhibit infinite families of purely periodic Jacobi-Perron Algorithm (JPA) expansions of dimension $n$ with period length equal to $m$ along with the associated Hasse-Bernstein units. Some observations on the units of Levesque-Rhin as well as the periodicity of the JPA expansion of $\left( m^{1/3}, m^{2/3} \right)$ are also made.Comment: like published version, incorporates referee's changes as well as other improvement