Call-by-name, Call-by-value, Call-by-need, and the Linear Lambda Calculus

Girard described two translations of intuitionistic logic into linear logic, one where A -> B maps to (!A) -o B, and another where it maps to !(A -o B). We detail the action of these translations on terms, and show that the first corresponds to a call-by-name calculus, while the second corresponds to call-by-value. We further show that if the target of the translation is taken to be an affine calculus, where ! controls contraction but weakening is allowed everywhere, then the second translation corresponds to a call-by-need calculus, as recently defined by Ariola, Felleisen, Maraist, Odersky, and Wadler. Thus the different calling mechanisms can be explained in terms of logical translations, bringing them into the scope of the Curry-Howard isomorphism

Energy in Agriculture: Energy for Greenhouses Part 1: Energy Conservation

The increased cost and scarcity of all fuels have affected the greenhouse owner as badly as any segment of industry. For some, crops have been damaged or lost. For others, it has reduced the margin of profit. Growers, manufacturers, suppliers, horticulturists, engineers and many others have studied the situation thoroughly in order to come up with viable solutions and alternatives for conserving fuel

Effect of Age-at-Weaning and Post-Weaning Management on Performance and Carcass Characteristics of Angus Steers

Recent developments in beef marketing have created more opportunities for producers to reap greater financial rewards based on the carcass merit of the animal. Increased premiums are being offered for animals that excel in the USDA\u27s Quality or Yield Grade scoring systems. There is an increasing focus on beef tenderness with today\u27s consumer. Producers need to understand how on-farm production practices can affect feedlot performance and carcass merit. This study utilized 75 Angus steers to determine the effects of age-at-weaning and post-weaning management on performance and carcass characteristics of steers

Effect of Age-at-Weaning and Post-Weaning Management on Performance and Carcass Characteristics of Charolais-Angus Cross Steers

Recent developments in beef marketing have created more opportunities for producers to reap greater financial rewards based on the carcass merit of the animal. Increased premiums are being offered for animals that excel in the USDA\u27s Quality or Yield Grade scoring systems. There is an increasing focus on beef tenderness with today\u27s consumer. Producers need to understand how on-farm production practices can affect feedlot performance and carcass merit. The study reported here used 74 Charolais x Angus cross steers to determine the effects of age-at-weaning and post-weaning management on performance and carcass characteristics

The Prograde Orbit of Exoplanet TrES-2b

We monitored the Doppler shift of the G0V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9 +/- 12 degrees relative to the projected stellar equator. With 98% confidence, the orbit is prograde.Comment: ApJ, in press [15 pages

A Fresh Look at Axions and SN 1987A

We re-examine the very stringent limits on the axion mass based on the strength and duration of the neutrino signal from SN 1987A, in the light of new measurements of the axial-vector coupling strength of nucleons, possible suppression of axion emission due to many-body effects, and additional emission processes involving pions. The suppression of axion emission due to nucleon spin fluctuations induced by many-body effects degrades previous limits by a factor of about 2. Emission processes involving thermal pions can strengthen the limits by a factor of 3-4 within a perturbative treatment that neglects saturation of nucleon spin fluctuations. Inclusion of saturation effects, however, tends to make the limits less dependent on pion abundances. The resulting axion mass limit also depends on the precise couplings of the axion and ranges from 0.5x10**(-3) eV to 6x10**(-3) eV.Comment: 32 latex pages, 13 postscript figures included, uses revtex.sty, submitted to Physical Review

Circadian preference and physical and cognitive performance in adolescence:A scoping review

Adolescence is a crucial period of development which coincides with changes in circadian rhythmicity. This may augment the impact of circadian preference on performance in this group. We aimed to scope the literature available on chronotypes and their effect on physical and mental aspects of performance in adolescents. Methods: Studies were identified by systematically searching bibliographical databases and grey literature. Results: The Morningness-Eveningness Questionnaire was the most frequently reported tool for circadian preference assessment. Academic achievement was the most prevailing outcome, with evidence suggesting that morning type adolescents tend to outperform evening types, yet the results vary depending on multiple factors. Performance in tests of intelligence and executive functions was generally better at optimal times of the day (synchrony effect). Physical performance was examined in 8 studies, with very heterogeneous outcomes. Conclusions: Although the associations between circadian preference and performance in adolescents are evident in some areas, there are many factors that may be involved in the relationship and require further investigation. This review highlights the assessment of physical performance in relation to chronotypes, the multidimensional assessment of circadian preference, and the need for longitudinal studies as priorities for further research

A Social Identity Approach to How Elite Outgroups Are Invoked by Politicians and the Media in Nativist Populism

Existing research into nativist populist (NP) rhetoric has shown that elite outgroups can be used by politicians to further anti‐immigration agendas. The social identity functions of elite outgroups outside of cultivating anti‐immigrant prejudice, however, remain poorly understood. In addition, whether populist news media can be considered social identity entrepreneurs in their own right remains an underexplored topic. This study examines the rhetorical use of elite outgroups in the United Kingdom, United States, and Australia from a social identity perspective, focusing on political leaders and newspapers op‐eds. Our findings demonstrate shared strategies across the countries and source types: (1) NPs depict elites as working through collusion to undermine trust in information production within society and vie for control of the ingroup informational influence; (2) NPs present themselves as nonelite and more ingroup prototypical on dimensions relevant to the elite collusion (being under attack and equally susceptible); (3) NPs contest ingroup norms through constructions of an anti‐immigrant consensus which is suppressed by elites. We conclude that social identity researchers should pay more attention to the rhetorical functions of elite outgroups in addition to cultivating anti‐immigrant prejudice, and that the media‐as‐identity‐entrepreneur is an important aspect of constructing shared social realities, and mobilizing support, within populism