10,385 research outputs found
Secondary aerospace batteries and battery materials: A bibliography, 1969 - 1974
This annotated bibliography on the subject of secondary aerospace battery materials and related physical and electrochemical processes was compiled from references to journal articles published between 1969 and 1974. A total of 332 citations are arranged in chronological order under journal titles. Indices by system and component, techniques and processes, and author are included
Examining the effects of policy interventions on increasing electric vehicle adoption in California
Any significant effort to reduce global emissions of greenhouse gasses must address the growing concern of the transportation sector’s inability to meaningfully reduce its emissions contribution. A major shift in the primary fuel used in the sector away from petroleum-based fuel to electricity is one potential way the sector can lower its emissions and transition into a sustainable future. However, a number of barriers face the electric vehicle market, including competing against an already mature vehicle market, battling consumer preferences, and overcoming technical challenges. This paper examines several policy proposals to combat these barriers and examines the impact similar policies could have on the electric vehicle market in California. California is chosen because of its historical leadership in environmental causes, and for exhibiting cultural values that are in line with increasing the adoption of electric vehicles. It is found that policies that affect the purchase price of the vehicle, and improve access to charging infrastructure are most effective in increasing the number of sales, but that policies aimed at signaling a longstanding commitment to the success of the EV market and reduce GHG emissions are a greater indicator of whether there is sustained growth in the EV market. Recommendations are given based on California’s current policy package to strengthen the current EV market, and transition into a self-sustaining market without the need for government intervention
A Thermochronometric, Microtextural, and Numerical Modeling Approach to Deciphering the Rock Record of Deformation Processes in the Wasatch and Denali Fault Zones
Fault zones are the primary features that accommodate movement of Earth’s crust, resulting in the formation of mountain belts and damaging earthquakes. Rocks modified by faulting and brought to Earth’s surface by erosion are archives of the mechanical processes involved in earthquakes and(or) aseismic creep. Thermochronometry is a radioisotopic dating system primarily sensitive to temperature and offers a means to constrain dates and rates of thermal processes. Hematite is common in fault zones, amenable to (U-Th)/He (He) thermochronometry, and exhibits distinct microtextures diagnostic of fault zone mechanics. I apply hematite He thermochronometry and microtextural analyses with a suite of other tools to interrogate the evolution of the Wasatch fault zone (WFZ), UT, USA, and the eastern Denali fault zone (EDFZ), Yukon, Canada over different scales in space and time.
Hematite He dates and microtextures from hematite-coated fault surfaces and veins from the WFZ show fault surfaces accommodated ancient seismicity. Although this seismicity isage, fault surfaces formed within pre-existing hematite that is 100s of Myr older. Microtextures reveal that WFZ earthquakes were facilitated by fluidization of hematite, extreme grain size reduction and rolling between grains, and breakdown of rough fault surfaces. Small fault surfaces in the WFZ are ultimately the product of deformation processes occurring throughout deep geologic time and at different timescales culminating in earthquakes. Low-temperature thermochronometry is also used to constrain erosion related to surface uplift of mountains adjacent to the EDFZ. Results show growth of topography and deformation along the EDFZ occurred in three stages from ~95–75 Ma, ~75–30 Ma, and ~30 Ma–present, primarily as a response to plate boundary processes \u3e200 km away. Hematite He dates from hematite-coated fault surfaces in the EDFZ constrain hematite precipitation at ~8–4 Ma and reveal a record of faulting that contributes to mountain growth. Hematite microtextures in these samples suggest aseismic fault slip. The collective results of this dissertation highlight the spectrum of deformation of Earth’s crust from the mountain- to fault surface-scales and from 100s of Myr to seconds, as well as the different tectonic and mechanical processes responsible for this evolution
Professional School Counselors and Relational Aggression: Training, Perceptions, Barriers, and Interventions
Relational aggression (RA) is a type of bullying in which the relationship is used as the agent of harm (Crick & Grotpeter, 1995). RA behaviors are intended to impair or ruin reputations, friendships, and feelings of inclusion in a peer group (Putallaz et al., 2007). Professional School Counselors (PSCs) are charged to be social justice advocates for students; RA is a social justice issue because the effects of RA bullying, victimization, and bullying/victimization lead to poor academic achievement. Recent literature suggests that PSCs do not perceive the effects of RA to be as serious as the effects of physical and verbal bullying; however, training can increase RA sensitivity and willingness to intervene (Jacobsen & Bauman, 2007). No studies have explored PSC training, PSC perceptions regarding RA, PSC perceived barriers to RA intervention, and PSC intervention strategies.
The purpose of this study was to examine PSC training for RA, PSC perceptions of RA as an issue with serious consequences for students, PSC perceived barriers to RA care, and the interventions PSCs currently use for RA. This study also examined if sex differences, grade level with which PSC worked, and school type in which PSC worked existed in PSC perceptions of RA as an issue with serious consequences for students. A substantial amount of PSCs surveyed strongly agreed (24.5%), agreed (39.8%) and somewhat agreed (26.8%; a cumulative of 91.2% of participants) that RA was an issue with serious consequences for students with whom they work. RA was recognized by PSCs as an issue with serious consequences for students with no significant differences by training, gender, and school type at which the PSC worked. Significant differences were found by school level with which the PSC worked. Several barriers to RA care were identified including lack of time, parents, issues with students reporting RA, and the confusion surrounding instances of RA. Several important RA interventions were identified including individual counseling with the victim and/or bully, using outside resources, group counseling, and focusing on school wide bullying interventions.
Implications for PSC practice and training were given in addition to implications for future research
Testing the Feasibility of a Passive and Active Case Ascertainment System for Multiple Rare Conditions Simultaneously: The Experience in Three US States
Background: Owing to their low prevalence, single rare conditions are difficult to monitor through current state passive and active case ascertainment systems. However, such monitoring is important because, as a group, rare conditions have great impact on the health of affected individuals and the well-being of their caregivers. A viable approach could be to conduct passive and active case ascertainment of several rare conditions simultaneously. This is a report about the feasibility of such an approach.
Objective: To test the feasibility of a case ascertainment system with passive and active components aimed at monitoring 3 rare conditions simultaneously in 3 states of the United States (Colorado, Kansas, and South Carolina). The 3 conditions are spina bifida, muscular dystrophy, and fragile X syndrome.
Methods: Teams from each state evaluated the possibility of using current or modified versions of their local passive and active case ascertainment systems and datasets to monitor the 3 conditions. Together, these teams established the case definitions and selected the variables and the abstraction tools for the active case ascertainment approach. After testing the ability of their local passive and active case ascertainment system to capture all 3 conditions, the next steps were to report the number of cases detected actively and passively for each condition, to list the local barriers against the combined passive and active case ascertainment system, and to describe the experiences in trying to overcome these barriers.
Results: During the test period, the team from South Carolina was able to collect data on all 3 conditions simultaneously for all ages. The Colorado team was also able to collect data on all 3 conditions but, because of age restrictions in its passive and active case ascertainment system, it was able to report few cases of fragile X syndrome. The team from Kansas was able to collect data only on spina bifida. For all states, the implementation of an active component of the ascertainment system was problematic. The passive component appears viable with minor modifications.
Conclusions: Despite evident barriers, the joint passive and active case ascertainment of rare disorders using modified existing surveillance systems and datasets seems feasible, especially for systems that rely on passive case ascertainment
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