High-efficiency crystalline silicon technology development

The rationale for pursuing high efficiency crystalline silicon technology research is discussed. Photovoltaic energy systems are reviewed as to their cost effectiveness and their competitiveness with other energy systems. The parameters of energy system life are listed and briefly reviewed

After CAN-SPAM, How States Can Stay Relevant in the Fight Against Unwanted Messages:How a Children\u27s Protection Registry Can be Effective and is Not Preempted, Under the New Federal Anti-Spam Law, 22 J. Marshall J. Computer & Info. L. 29 (2003)

The recipe for success to combat unsolicited and unwanted e-mail, otherwise known as spam, has not yet been formulated by the thirty-six states that have tried by enacting their own versions of anti-spam laws. Only two state prosecutions were ever successfully brought against spammers, and only one was able to enforce its law against an out-of-state spammer. Now, on the federal level, with the passing of the CAN-SPAM act, which essentially rehashes what states have attempted to do, the failure to provide any significant measure of national success against spam seems likely. However, a careful reading of the language of CAN-SPAM may provide some leeway for states to continue to experiment with different methods that may ultimately prove to allow for more successful prosecution against spammers. This article examines the laws\u27 various provisions in an attempt to clarify why the various anti-spam laws enacted by the states, and now the federal government, did not bring about the hoped-for results of successful prosecution against spammers. It suggests a new approach to anti-spam law, a Children’s Protection Registry. Instead of taking a general approach, the proposal targets the worst effects of spam. This proposal will circumvent the problems that first-generation spam laws faced and promises more regular and successful enforcement

Radio Pulse Properties of the Millisecond Pulsar PSR J0437-4715. I. Observations at 20cm

We present a total of 48 minutes of observations of the nearby, bright millisecond pulsar PSR J0437-4715 taken at the Parkes radio observatory in Australia. The data were obtained at a central radio frequency of 1380 MHz using a high-speed tape recorder that permitted coherent Nyquist sampling of 50 MHz of bandwidth in each of two polarizations. Using the high time resolution available from this voltage recording technique, we have studied a variety of single-pulse properties, most for the first time in a millisecond pulsar. We find no evidence for "diffractive" quantization effects in the individual pulse arrival times or amplitudes as have been reported for this pulsar at lower radio frequency using coarser time resolution (Ables et al. 1997). Overall, we find that the single pulse properties of PSR J0437-4715 are similar to those of the common slow-rotating pulsars, even though this pulsar's magnetosphere and surface magnetic field are several orders of magnitude smaller than those of the general population. The pulsar radio emission mechanism must therefore be insensitive to these fundamental neutron star properties.Comment: 24 Postscript pages, 11 eps figures. Accepted for publication in the Astrophysical Journal. Abbreviated abstract follow

Strategic Investments in Large Pelagic Research

The Southeast Fisheries Science Center (SEFSC) of the US NOAA Fisheries provides much of the US science advice for the management of Highly Migratory Species (HMS) in the Atlantic, Gulf of Mexico and US Caribbean Sea. These stocks include the tunas, sharks, billfishes and swordfish all of which are targeted either commercially or recreationally or both in US waters. These species are managed internationally through membership to the International Commission for the Conservation of Atlantic Tunas (ICCAT); however, while the US is an ICCAT member, few Caribbean nations are members

Optimality Theory as a Framework for Lexical Acquisition

This paper re-investigates a lexical acquisition system initially developed for French.We show that, interestingly, the architecture of the system reproduces and implements the main components of Optimality Theory. However, we formulate the hypothesis that some of its limitations are mainly due to a poor representation of the constraints used. Finally, we show how a better representation of the constraints used would yield better results

Resident connection to nature and attitudes towards tourism : findings from three different rural nature tourism destinations in Poland

Despite the growing literature arguing for the consideration of community perspectives in tourism destination governance, little is understood about how residents' connection to nature affects their perceptions of and responses to tourism. This is especially relevant for rural areas rich in nature as many of them have become refugees for urban dwellers seeking recreation during the COVID-19 pandemic. This study combines the Nature's Contributions to People framework and Weber's Theory of Formal and Substantive Rationality to shed light on how rural residents of three nature-based tourism destinations connect with nature and how this connection to nature affects perceptions of empowerment from tourism and ultimately support for tourism. Results provide credence to the importance of including measures of residents' connections to nature when examining attitudes towards tourism in nature areas with connections to nature having significant and positive influences on psychological empowerment and social empowerment at all three destinations and direct and positive effects on support for tourism across two of the three destinations. Furthermore, results suggest that understanding the role nature connection plays in how residents perceive changes within their community can help manage locally emerging conflicts within rural tourism-dependent communities