Copyright (c) 2013 Purdue University All rights reserved. http://docs.lib.purdue.edu/gpridocs Recent documents in GPRI Digital Library en-us Fri, 07 Jun 2013 01:40:50 PDT 3600 http://docs.lib.purdue.edu/gpridocs/10 http://docs.lib.purdue.edu/gpridocs/10 Wed, 05 Jun 2013 13:46:30 PDT Jeffrey Peters http://docs.lib.purdue.edu/gpridocs/9 http://docs.lib.purdue.edu/gpridocs/9 Wed, 05 Jun 2013 13:46:28 PDT Skyrocketing mobile data demands caused by increasing adoption of smartphones, tablet computers, and broadband-equipped laptops will soon swamp the capacity of our nation’s wireless networks, a fact that promises to stagnate a $1 trillion slice of the nation’s economy. Among scholars and policymakers studying this looming “spectrum crisis,” consensus is developing that regulators must swiftly reclaim spectrum licensed to other industries and reallocate those rights to wireless providers. In this interdisciplinary piece, we explain in succinct terms why this consensus is wrong. With data demands increasing at an exponential rate, spectrum reallocation plans that promise only linear growth are destined to fail. What regulators should focus on, instead, are policies that encourage the sluggish incumbents presently dominating the wireless industry to roll out new networking technologies (like tiered network architectures, cognitive radio, and multicell MIMO) that together may allow exponential increases in spectral efficiency.

]]> David J. Love http://docs.lib.purdue.edu/gpridocs/8 http://docs.lib.purdue.edu/gpridocs/8 Fri, 13 Jul 2012 11:45:12 PDT The United States government has adopted new approaches to counter violent extremist organizations around the world. “Soft security” and development programs include focused educational training for groups vulnerable to terrorist recruitment, norm messaging through local radio programming, and job creation in rural communities. This article evaluates the effectiveness of one set of these multi-vectored, community-level programs through analysis of data from 200 respondents in two similar, neighboring cities in northern Mali, Africa. The data show that residents in Timbuktu who were exposed to the programming for up to five years displayed measurably altered civic behavior and listening patterns in comparison with their counterparts in the control city of Dire which had no programming (controlling for potential covariates including age, ethnicity, and political and socioeconomic conditions). However, there was little measurable difference between the groups in terms of their cultural identities and attitudes towards the West. This article suggests that the process of “winning hearts and minds” can be effective at certain levels but may require extended time and dedicated resources to have higher-level results.

]]> Daniel P. Aldrich http://docs.lib.purdue.edu/gpridocs/7 http://docs.lib.purdue.edu/gpridocs/7 Thu, 28 Jun 2012 09:14:53 PDT Thomas Hertel et al. http://docs.lib.purdue.edu/gpridocs/6 http://docs.lib.purdue.edu/gpridocs/6 Wed, 23 Nov 2011 06:54:59 PST Plug-in Hybrid Electric Vehicles (PHEVs) will soon start to be introduced into the transportation sector, thereby raising a host of issues related to their use, adoption and effects on the electricity sector. Their introduction has the potential to significantly reduce carbon emissions from the transportation sector, which has led to government policies aimed at easing their introduction. If their wide-spread adoption is set as a target it is imperative to consider the effects of existing policies that may increase or decrease their adoption rate. In this study, we present a micro level electricity demand model that can gauge the effects of PHEVs on household electricity consumption and the subsequent economic attractiveness of the vehicles. We show that the electricity pricing policy available to the consumer is a very significant factor in the economic competitiveness of PHEVs. Further analysis shows that the increasing tier electricity pricing system used in California will substantially blunt adoption of PHEVs in the state; and time of use electricity pricing will render PHEVs more economically attractive in any state.

]]> Shisheng Huang et al. http://docs.lib.purdue.edu/gpridocs/5 http://docs.lib.purdue.edu/gpridocs/5 Wed, 23 Nov 2011 06:54:58 PST We evaluated several variants of a variable biofuel subsidy and compared them with the fixed subsidy and Renewable Fuel Standard. We used two different modeling approaches. First we used a partial equilibrium model encompassing crude oil, gasoline, ethanol, corn, and ethanol by-products. Second, we used a stochastic simulation model of a prototypical ethanol plant. From the partial equilibrium analysis, it appears the variable subsidy provides a safety net for ethanol producers when oil prices are low; yet, it does not put undue pressure on corn prices when oil prices are high. At high oil prices, with a variable subsidy, the level of ethanol production is driven entirely by market forces. From the plant level stochastic analysis, essentially the same conclusions are reached. The variable subsidy can provide essentially the same expected NPV as the fixed subsidy but with a lower risk for the producer, a lower probability of a loss from the investment, and often at a lower expected cost to government. Finally, in the U.S., the ethanol industry is up against a blending limit called the blend wall. If the blending wall remains in place, it does not matter much what other policy options are used.

]]> Wallace E. Tyner et al. http://docs.lib.purdue.edu/gpridocs/4 http://docs.lib.purdue.edu/gpridocs/4 Tue, 08 Feb 2011 05:48:46 PST The following remarks were invited by Purdue's Energy Club based on questions prepared by the club students. The meeting took place on November 9, 2010 and was well attended. The responses to the questions elicited were many well posed follow-up questions and comments.

]]> Arden L. Bement Jr. http://docs.lib.purdue.edu/gpridocs/3 http://docs.lib.purdue.edu/gpridocs/3 Wed, 15 Dec 2010 12:09:42 PST Arden L. Bement Jr. http://docs.lib.purdue.edu/gpridocs/2 http://docs.lib.purdue.edu/gpridocs/2 Wed, 15 Dec 2010 12:09:40 PST Arden L. Bement Jr. http://docs.lib.purdue.edu/gpridocs/1 http://docs.lib.purdue.edu/gpridocs/1 Wed, 15 Dec 2010 12:09:38 PST Arden L. Bement Jr.