Trends in life cycle greenhouse gas emissions of future light duty electric vehicles

The majority of previous studies examining life cycle greenhouse gas (LCGHG) emissions of battery electric vehicles (BEVs) have focused on efficiency-oriented vehicle designs with limited battery capacities. However, two dominant trends in the US BEV market make these studies increasingly obsolete: sales show significant increases in battery capacity and attendant range and are increasingly dominated by large luxury or high-performance vehicles. In addition, an era of new use and ownership models may mean significant changes to vehicle utilization, and the carbon intensity of electricity is expected to decrease. Thus, the question is whether these trends significantly alter our expectations of future BEV LCGHG emissions. To answer this question, three archetypal vehicle designs for the year 2025 along with scenarios for increased range and different use models are simulated in an LCGHG model: an efficiency-oriented compact vehicle; a high performance luxury sedan; and a luxury sport utility vehicle. While production emissions are less than 10% of LCGHG emissions for today's gasoline vehicles, they account for about 40% for a BEV, and as much as two-thirds of a future BEV operated on a primarily renewable grid. Larger battery systems and low utilization do not outweigh expected reductions in emissions from electricity used for vehicle charging. These trends could be exacerbated by increasing BEV market shares for larger vehicles. However, larger battery systems could reduce per-mile emissions of BEVs in high mileage applications, like on-demand ride sharing or shared vehicle fleets, meaning that trends in use patterns may countervail those in BEV design

Data processing method for a weak, moving telemetry signal

Method of processing data from a spacecraft, where the carrier has a low signal-to-noise ratio and wide unpredictable frequency shifts, consists of analogue recording of the noisy signal along with a high-frequency tone that is used as a clock to trigger a digitizer

Solar sustained plasma/absorber conceptual design

A space power system concept was evaluated which uses concentrated solar energy to heat a working fluid to temperatures as high as 4000 K. The high temperature working fluid could be used for efficient electric power production in advanced thermal or magnetohydrodynamic conversion cycles. Energy absorber configurations utilizing particles or cesium vapor absorber material were investigaed. Results of detailed radiant heat transfer calculations indicated approximately 86 percent of the incident solar energy could be absorbed within a 12-cm-dia flowing stream of gas borne carbon particles. Calculated total energy absorption in the cesium vapor seeded absorber configuration ranged from 34 percent to 64 percent of the incident solar energy. Solar flux concentration ratios of between approximately 3000 and 10,000 will be required to sustain absorber temperatures in the range from 3000 K to 4000 K

Transport on randomly evolving trees

The time process of transport on randomly evolving trees is investigated. By introducing the notions of living and dead nodes a model of random tree evolution is constructed which describes the spreading in time of objects corresponding to nodes. By using the method of the age-dependent branching processes we derive the joint distribution function of the number of living and dead nodes, and determine the correlation between these node numbers as a function of time. Also analyzed are the stochastic properties of the end-nodes; and the correlation between the numbers of living and dead end-nodes is shown to change its character suddenly at the very beginning of the evolution process. The survival probability of random trees is investigated and expressions are derived for this probability.Comment: 16 pages, 8 figures, published in Phys. Rev. E 72, 051101 (2005

The K-band spectrum of the Cataclysmic Variable RXJ 0502.8+1624 (Tau 4)

We present the K-band spectrum of the cataclysmic variable RXJ 0502.8+1624 (Tau 4). The spectrum shows a broad, smooth hump, with no absorption lines from the secondary star visible. This result indicates that the infrared light of this system is dominated by cyclotron emission, and, in combination with the optical spectrum and X-ray properties, suggests that Tau 4 is a polar-type cataclysmic variable (CV). The system was chosen for study because the broadband JHK colours of Tau 4 are consistent with an L-type dwarf, suggesting that this system might harbour an elusive sub-stellar secondary star. The result presented here, along with the recent discovery of cyclotron emission in the cataclysmic variable EF Eri, suggests that care must be taken when using the broadband JHK colours of CVs when targeting searches for sub-stellar secondary starsComment: 4 pages, to appear as research note in A&

Antimicrobial Susceptibilities of Aerobic Isolates from Respiratory Samples of Young New Zealand Horses

3rd Annual IEEE Energy Conversion Congress and Exposition, ECCE 2011, Phoenix, AZ, 17-22 September 2011This paper presents a method of mitigating the transient overshoots of DC-DC converters operating with large load disturbances. The method involves a small auxiliary power circuit with a complementary control scheme that provides a smooth absorption and release of excess energy from and to the main DC-DC converter in the events of large load changes. This control mechanism interactively mitigates the large transient overshoots which would otherwise appear at the converter output. Since the control scheme involves an adjustable-energy-storage feature, the proposed solution is effective for any level of step-load change within a pre-specified range.Department of Electronic and Information EngineeringRefereed conference pape

Cognitive-Behavioral Treatment for Child and Adolescent Anxiety: The \u3cem\u3eCoping Cat Program\u3c/em\u3e

Anxiety disorders are common psychological disorders experienced by youth (Warren & messer, 1999), with reported rates of 10-20% in the general population and primary care settings (Chavira, Stein, Bailey, & Stein, 2004; Costello, Mustillo, Keeler, & Angold, 2004). Anxiety disorders in youth include generalized anxiety disorder (GAD), social phobia (SP), separation anxiety disorder (SAD), specific phobias, obsessive-compulsive disorder (OCD), and post-traumatic stress disorder (PTSD) (APA, 1994). In this chapter, we focus on treatment for the three youth anxiety disorders: GAD, SP, and SAD

Emotional Self-Control, Interpersonal Shame, and Racism as Predictors of Help-Seeking Attitudes among Asian Americans: An Application of the Intrapersonal-Interpersonal-Sociocultural Framework

The present study is a cross-sectional investigation of emotional self-control, interpersonal shame, and subtle racism as predictors of Asian American attitudes toward professional help-seeking in a sample of Asian American college students (N = 153). The authors applied and extended P. Y. Kim and Lee’s (2014) intrapersonal-interpersonal framework of Asian American help-seeking to include racism as a sociocultural correlate. It was hypothesized that emotional self-control (intrapersonal correlate), interpersonal shame variables of external shame and family shame (interpersonal correlates), and racism (sociocultural correlate) would incrementally predict professional help-seeking attitudes, controlling for previous counseling experience. Participants completed an online survey containing the demographic and study variables. Hierarchical regression analyses (Step 1: counseling experience; Step 2: emotional self-control; Step 3: interpersonal shame [external and family]; Step 4: racism) indicated that emotional self-control and racism were negative predictors of favorable attitudes, whereas external shame was a positive predictor of favorable help-seeking attitudes. The findings have implications for advancing the Asian American literature pertaining to professional help-seeking correlates and for practitioners working with Asian American students to favorably impact mental health service utilization