Author: SRI International
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Origin of the tunable open circuit voltage in ternary blend bulk heterojunction organic solar cells
Ternary blend bulk heterojunction organic solar cells comprising two polythiophene polymer donors or two fullerene acceptors are shown to have unique electronic properties.
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Electronic structure and mobility of alkylated and nonalkylated organic semiconductors: role of van der Waals interactions
We present a comparison based on first-principles calculations of the electronic structure of nonalkylated and alkylated dinaphtho[2,3-b:2,3-f]thieno[3,2-b]thiophene: DNTT and DNTT-C10.
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Flow cytometry on a chip
After a brief review of some new technologies important for on the flow anayte characterization we will describe an optical detection technique termed spatially modulated fluorescence emission developed at PARC which can delivers high signal-to-noise discrimination without precision optics to enable a flow cytometer that can combine high performance, robustness, compactness, low cost, and ease…
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Persistent photoconductivity effects in printed n-channel organic transistors
Persistent photoconductivity of top-gate n-type organic transistors is investigated, as the irradiation of light leads to a negative shift in transistor threshold voltage and an increase in subthreshold current.
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Early childhood language interventions: An illustration of the model demonstration process
This project brief summarizes the characteristics, implementation experiences, and outcomes achieved by one of OSEP’s investments in model demonstration activities—a cohort of three grantees that demonstrated various approaches to implementing early childhood language interventions that targeted children with significant language disorders or delays and who were eligible for early intervention services.
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Positive Results When Preschoolers Use Media-Rich Math Curriculum Supplement
SRI Education and Education Development Center (EDC) recently released findings from our large experimental field study of a PBS KIDS mathematics curriculum supplement. The PBS curriculum supplement features use of “transmedia”—with familiar characters, settings and stories appearing across different platforms, such as video and interactive games. The study’s findings can inform the conversations that parents, teachers, policy…
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Multi-Instrument Observations of SED During 24-25 October 2011 Storm: Implications for SED Formation Processes
We present multiple instrument observations of a storm-enhanced density (SED) during the 24–25 October 2011 intense geomagnetic storm.
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Influence of a Dopamine Pathway Additive Genetic Efficacy Score on Smoking Cessation: Results from Two Randomized Clinical Trials of Bupropion
We aimed to evaluate associations of treatment and an ‘additive genetic efficacy score’ (AGES) based on dopamine functional polymorphisms with time to first smoking lapse and point prevalence abstinence at end of treatment among participants enrolled in two randomized clinical trials of smoking cessation therapies.
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Rapid Identification of Sequences for Orphan Enzymes to Power Accurate Protein Annotation
In this study, we demonstrate how this orphan enzyme “back catalog” is a fertile source for rapidly advancing the state of protein annotation.
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Distinct Loci in the CHRNA5/CHRNA3/CHRNB4 Gene Cluster Are Associated with Onset of Regular Smoking
This meta-analysis examines early smoking phenotypes and SNPs in the gene cluster to determine: (1) whether the most robust association signal in this region (rs16969968) for other smoking behaviors is also associated with early behaviors, and/or (2) if additional statistically independent signals are important in early smoking.
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Textile Damage in Astronaut Gloves
This article describes the damage observations and results of the laboratory tests, deduces how the damage occurred, and presents guidelines for designing gloves that are more damage resistant.
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Comparison of SuperDARN Irregularity Drift Measurements and F-Region Ion Velocities from the Resolute Bay ISR
This work is motivated by testing the same assumption on a more optimal experimental setting: using the north face of the Resolute Bay incoherent scatter radar (RISR-N) thereby reducing echo mixing due to spatio-temporal structuring.