365 research outputs found
IRREVERSIBLE INVESTMENT DECISIONS IN PERENNIAL CROPS WITH YIELD AND PRICE UNCERTAINTY
No full textOptimal entry and exit thresholds for Georgia commercial peach production are calculated when both price and yield follow a Brownian motion process. The thresholds are based on an irreversible sunk-cost investment model, where revenue from peach production is affected by the timing of when to enter production. Results indicate stability in Georgia peach production, with growers who are currently producing peaches remaining in production and potential peach growers delaying investment unless they have the ability of earning enhanced returns.Crop Production/Industries,
Should We Invest in Biofuels?
No full textThe real advantage of receiving a Southern Agricultural Economics Association Lifetime Achievement award is the ability to make this presentation and have it published without having to deal with editors and referees. This provides a certain license of freedom to abstract outside the box without being constrained by your peers. So in this vein, consider the following myths and predictions concerning biofuels. These myths are generally consistent with the Grunwald’s (2009) seven myths about alternative energy.Alternative energy, Biofuels, Agribusiness, Community/Rural/Urban Development, Environmental Economics and Policy, Resource /Energy Economics and Policy,
Le pays d'Uz et le couvent de Job (Notes rédigées d'après un travail de M. J.-G. Wetzstein, publié dans le Commentaire de Delitzsch.)
No full textLombard Alexandre. Le pays d'Uz et le couvent de Job (Notes rédigées d'après un travail de M. J.-G. Wetzstein, publié dans le Commentaire de Delitzsch.) . In: Le Globe. Revue genevoise de géographie, tome 16, 1877. pp. 61-75
AN ECONOMIC EVALUATION OF A MULTI-AREA RECREATION SYSTEM
No full textResource /Energy Economics and Policy,
Depth of Field Analysis for Multilayer Automultiscopic Displays
No full textWith the re-emergence of stereoscopic displays, through polarized glasses for theatrical presentations and shuttered liquid crystal eyewear in the home, automultiscopic displays have received increased attention. Commercial efforts have predominantly focused on parallax barrier and lenticular architectures applied to LCD panels. Such designs suffer from reduced resolution and brightness. Recently, multilayer LCDs have emerged as an alternative supporting full-resolution imagery with enhanced brightness and depth of field. We present a signal-processing framework for comparing the depth of field for conventional automultiscopic displays and emerging architectures comprising multiple light-attenuating layers. We derive upper bounds for the depths of field, indicating the potential of multilayer configurations to significantly enhance resolution and depth of field, relative to conventional designs.Massachusetts Institute of Technology. Media LaboratoryMIT Camera Culture GroupNational Science Foundation (U.S.) (Grant IIS-1116452)United States. Defense Advanced Research Projects Agency. MOSAIC ProgramUnited States. Defense Advanced Research Projects Agency. SCENICC ProgramAlfred P. Sloan Foundation (Research Fellowship)United States. Defense Advanced Research Projects Agency. (Young Faculty Award
AN ECONOMIC EVALUATION OF SOYBEAN STINK BUG CONTROL ALTERNATIVES FOR THE SOUTHEASTERN UNITED STATES
No full textMethyl parathion or Penncap M (an encapsulated methyl parathion) are used extensively throughout the United States for controlling stink bug pests in soybeans, Glycine Max (L.) Merrill. However, this insecticide is highly toxic to mammals, birds, and non-target arthropods, and thus is less environmentally sound than other insecticides. For environmental and human health considerations, investigating alternative insecticides for control is desired. For this investigation, research based on field experimental data from Florida, Georgia, and Louisiana during the 1988 and 1989 growing seasons were employed. Results indicate that alternative, currently available, and less toxic insecticides may reduce producer costs, increase yield, and improve soybean quality. These alternative insecticides include Scout (tralomethrin), Karate (lambda-cyhalothrin), Orthene (acephate), and Baythroid (cyfluthrin). In terms of improved profits these alternative insecticides may dominate methyl parathion or encapsulated methyl parathion.Crop Production/Industries,
Tensor displays: compressive light field synthesis using multilayer displays with directional backlighting
No full textWe introduce tensor displays: a family of compressive light field displays comprising all architectures employing a stack of time-multiplexed, light-attenuating layers illuminated by uniform or directional backlighting (i.e., any low-resolution light field emitter). We show that the light field emitted by an N-layer, M-frame tensor display can be represented by an Nth-order, rank-M tensor. Using this representation we introduce a unified optimization framework, based on nonnegative tensor factorization (NTF), encompassing all tensor display architectures. This framework is the first to allow joint multilayer, multiframe light field decompositions, significantly reducing artifacts observed with prior multilayer-only and multiframe-only decompositions; it is also the first optimization method for designs combining multiple layers with directional backlighting. We verify the benefits and limitations of tensor displays by constructing a prototype using modified LCD panels and a custom integral imaging backlight. Our efficient, GPU-based NTF implementation enables interactive applications. Through simulations and experiments we show that tensor displays reveal practical architectures with greater depths of field, wider fields of view, and thinner form factors, compared to prior automultiscopic displays.United States. Defense Advanced Research Projects Agency (DARPA SCENICC program)National Science Foundation (U.S.) (NSF Grant IIS-1116452)United States. Defense Advanced Research Projects Agency (DARPA MOSAIC program)United States. Defense Advanced Research Projects Agency (DARPA Young Faculty Award)Alfred P. Sloan Foundation (Fellowship
An Ethanol Blend Wall Shift is Prone to Increase Petroleum Gasoline Demand
No full textThe US Environmental Protection Agency announced a waiver allowing an increase in the Fuel-Ethanol blend limit (the “blend wall” ) from 10% (E10) to 15% (E15) on October,2010.Justifications for the waiver are reduced vehicle fuel prices and less consumption of petroleum gasoline, leading to energy security. In this paper, employing Monte Carlo simulations and Savitzky-Golay smoothing filter, an empirical study examines this waiver revealing an anomaly where a relaxation of this blend wall elicits a demand response. Under a wide range of elasticities, this demand response can actually increase the consumption of petroleum gasoline and thus lead to greater energy insecurity. The economics supporting this result and associated policy implications are developed and discussed.Blend wall, Energy security, Ethanol, Resource /Energy Economics and Policy,
مقدّمة الادب « Introduction à la philologie », par ʾl-Qâsim Maḥmoûd ibn ʿOmar Al-Zamakhscharî.
No full textمقدّمة الادبNumérisation effectuée à partir d'un document de substitution.Aboû Ce lexique arabe-persan a été publié par M. Wetzstein (in-4°, Leipzig, 1850). La préface, accompagnée d'une traduction persane interlinéaire, commence ainsi : الحمد لله الذى فضّل على جميع الالسنة .لسان العرب La fin manque
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