Publications by authors named "William Hansen"

Purpose: A model is proposed in which longitudinal changes in adolescents' dispositions increase age-related risk for the onset of substance use.

Method: Pooled surveys from 25 longitudinal studies were examined. Disposition was calculated from eight variables: use intentions; refusal intentions; attitudes; positive consequence beliefs; beliefs about negative consequences; descriptive peer normative beliefs; injunctive peer normative beliefs; and lifestyle incongruence.

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Workflow managers play a critical role in the efficient planning and execution of complex workloads. A handful of these already exist within the world of computational materials discovery, but their dynamic capabilities are somewhat lacking. The PerQueue workflow manager is the answer to this need.

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Galacto-oligosaccharide (GOS) is a prebiotic isolated from whey. This study evaluated the optimal inclusion rate for improving the growth and health performance of neonatal calves. Eighty-eight 2 to 5-d old Holstein bull calves were blocked by initial BW and randomly allocated to 1 of 4 treatments using a randomized complete block design.

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Background: Overprescription of opioids has led to increased misuse of opioids, resulting in higher rates of overdose. The workplace can play a vital role in an individual's intentions to misuse prescription opioids with injured workers being prescribed opioids, at a rate 3 times the national average. For example, health care workers are at risk for injuries, opioid dispensing, and diversion.

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Neutrophils are innate immune cells that play a key role in pathogen clearance. They contribute to inflammatory diseases, including diabetes, by releasing pro-inflammatory cytokines, reactive oxygen species, and extracellular traps (NETs). NETs contain a DNA backbone and catalytically active myeloperoxidase (MPO), which produces hypochlorous acid (HOCl).

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Objective: Workers in industries with high rates of opioid dispensing as well as those with high rates of non-fatal work-related injuries are at greater risk for opioid misuse, which can lead to addiction, overdose, or death.

Methods: Using secondary cross-sectional data collected from 856 healthcare workers, this pilot study examines a conceptual model for workers' intentions to seek out prescription opioids and intentions to use opioids at higher doses over longer periods.

Results: Results showed significant protective effects of beliefs, injunctive and subjective norms, and behavioral control on intentions to seek out opioids.

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The goal of the current study is to examine the degree to which measures of quality of implementation and student engagement moderate pretest-posttest changes in mediating variables that are targeted by DARE "keepin' it REAL." DARE officers (10 elementary school, five middle school) taught DARE "keepin' it REAL lessons to 1,017 elementary students (480 boys and 534 girls) and 435 middle school students (217 boys and 215 girls). We examined teachers' and students' ratings of elementary and middle schools in response to DARE officers' delivery of the program.

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Precise metal-protein coordination by design remains a considerable challenge. Polydentate, high-metal-affinity protein modifications, both chemical and recombinant, can enable metal localization. However, these constructs are often bulky, conformationally and stereochemically ill-defined, or coordinately saturated.

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This study analyzed measures aggregated at the school level to identify key predictors of drinking alcohol, binge drinking, smoking cigarettes, and using marijuana. Using data collected from 6th through 12th grade students between 2011 and 2015, we identify school-level variables that predict school-level prevalence in the subsequent year. Data included prior year assessments of: (1) school-wide prevalence, (2) perceived ease of access to drugs, (3) perceived adult disapproval of drug use, (4) perceived peer disapproval of drug use, and (5) perceived prevalence of drug use.

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Teachers often group students into teams to organize their classrooms and network-informed interventions hold great promise as a way to facilitate positive peer influence and promote the diffusion of intervention effects. Yet thus far, relatively little research has explored how teachers or prevention scientists can best use social network information to assign students to teams. The goal of the present study was to identify and compare seven methods that use different data sources and assignment algorithms to create teams of students.

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DNA polymerases have evolved to feature a highly conserved activity across the tree of life: formation of, without exception, internucleotidyl O-P linkages. Can this linkage selectivity be overcome by design to produce xenonucleic acids? Here, we report that the structure-guided redesign of an archaeal DNA polymerase, 9°N, exhibits a new activity undetectable in the wild-type enzyme: catalyzing the formation of internucleotidyl N-P linkages using 3'-NH-ddNTPs. Replacing a metal-binding aspartate in the 9°N active site with asparagine was key to the emergence of this unnatural enzyme activity.

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We normalized, harmonized, and pooled 344,429 surveys collected from 106,470 research participants from 25 research studies that assessed past 30-day alcohol use, drunkenness, smoking cigarettes, using marijuana, and a host of psychosocial variables. After normalizing and harmonizing psychosocial measures, we completed analyses to examine the ability of psychosocial variables to serve as proxy indicators of use. Intentionality, peer descriptive normative beliefs, and age emerged as being of primary importance in indicating use.

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Each year vast international resources are wasted on irreproducible research. The scientific community has been slow to adopt standard software engineering practices, despite the increases in high-dimensional data, complexities of workflows, and computational environments. Here we show how scientific software applications can be created in a reproducible manner when simple design goals for reproducibility are met.

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The role of human prostatic acid phosphatase (PAcP, P15309|PPAP_HUMAN) in prostate cancer was investigated using a new proteomics tool termed signal sequence swapping (replacement of domains from the native cleaved amino terminal signal sequence of secretory/membrane proteins with corresponding regions of functionally distinct signal sequence subtypes). This manipulation preferentially redirects proteins to different pathways of biogenesis at the endoplasmic reticulum (ER), magnifying normally difficult to detect subsets of the protein of interest. For PAcP, this technique reveals three forms identical in amino acid sequence but profoundly different in physiological functions, subcellular location, and biochemical properties.

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The role of human prostatic acid phosphatase (PAcP, P15309|PPAP_HUMAN) in prostate cancer was investigated using a new proteomic tool termed signal sequence swapping (replacement of domains from the native cleaved amino terminal signal sequence of secretory/membrane proteins with corresponding regions of functionally distinct signal sequence subtypes). This manipulation preferentially redirects proteins to different pathways of biogenesis at the endoplasmic reticulum, magnifying normally difficult to detect subsets of the protein of interest. For PAcP this technique reveals three forms identical in amino acid sequence but profoundly different in physiological functions, subcellular location, and biochemical properties.

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The goal of this paper is to explore relations between adolescent values, interests in activities and their bonding to school. This paper presents survey research findings that examine 1,928 6 and 7 grade students' responses to survey prompts about 15 terminal values adapted from Rokeach's (1973) theory of values, prompts about 11 activities they may be interested in, and questions about how attached they felt to school. The goal of analysis is to document the relative importance of each terminal value for this sample.

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Jacob Cohen developed two statistical measures for judging the magnitude of effects produced by an intervention, known as Cohen's d, appropriate for assessing scaled data, and Cohen's h, appropriate for assessing proportions. These have been widely employed in evaluating the effectiveness of alcohol, cigarette, marijuana, and other drug prevention efforts. I present two tests to consider the adequacy of using these statistics when applied to drug use prevention programs.

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The design of protein-based assemblies is an emerging area in bionanotechnology with wide ranging applications, from vaccines to smart biomaterials. Design approaches have sought to mimic both the topologies of assemblies observed in nature, as well as their functionally relevant properties, such as being responsive to external cues. In the last few years, diverse design approaches have been used to construct assemblies with integer-dimensional (e.

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Background: The widespread adoption of smartphones provides researchers with expanded opportunities for developing, testing and implementing interventions. National Institutes of Health (NIH) funds competitive, investigator-initiated grant applications. Funded grants represent the state of the science and therefore are expected to anticipate the progression of research in the near future.

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Fractal topologies, which are statistically self-similar over multiple length scales, are pervasive in nature. The recurrence of patterns in fractal-shaped branched objects, such as trees, lungs and sponges, results in a high surface area to volume ratio, which provides key functional advantages including molecular trapping and exchange. Mimicking these topologies in designed protein-based assemblies could provide access to functional biomaterials.

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Numerous studies emphasize the role of student engagement in academic learning and performance. Less known is whether engagement plays a role in drug prevention program outcomes. We examined a self-report measure of engagement as part of the All Stars Core drug prevention program evaluation, assessing its impact on target risk mechanisms and behavioral outcomes.

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We introduce a strategy for creating virtual control groups-cases generated through computer algorithms that, when aggregated, may serve as experimental comparators where live controls are difficult to recruit, such as when programs are widely disseminated and randomization is not feasible. We integrated and harmonized data from eight archived longitudinal adolescent-focused data sets spanning the decades from 1980 to 2010. Collectively, these studies examined numerous psychosocial variables and assessed past 30-day alcohol, cigarette, and marijuana use.

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Article Synopsis
  • Thermostabilization is crucial for enhancing enzyme durability in organic synthesis, especially as traditional methods like directed evolution can be tedious and may compromise enzyme function.
  • The study presents a novel method that introduces nonreducible covalent staples into proteins through computational design, significantly improving the thermostability of myoglobin-based cyclopropanation biocatalysts without losing their effectiveness.
  • The stabilized enzymes not only show better performance in challenging conditions, such as high levels of organic solvents, but also maintain their catalytic efficiency and selectivity, suggesting broad applicability for this stabilization technique across various proteins.
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