685 research outputs found
Transaction Costs: Prosecuting child trafficking for illegal adoption in Russia
As primary implementers of laws on human trafficking, law enforcement helps construct how these laws are understood and applied. This article examines how this process has unfolded in Russia by looking at the phenomenon of and debates surrounding child trafficking for illegal adoption. It argues that pre-existing experience with trafficking laws and cultural narratives surrounding adoption have led law enforcement to focus on uncovering evidence of monetary transactions rather than exploitation when prosecuting trafficking cases. This construction of the meaning of trafficking comes with important trade-offs. While the emphasis on transactions helps law enforcement to be successful at prosecuting cases involving selling children for illegal adoption, a focus on transactions rather than exploitation results in a de facto prosecution policy that ignores the many forms of exploitation that occur in other trafficking cases
Structural and functional-annotation of an equine whole genome oligoarray
<p>Abstract</p> <p>Background</p> <p>The horse genome is sequenced, allowing equine researchers to use high-throughput functional genomics platforms such as microarrays; next-generation sequencing for gene expression and proteomics. However, for researchers to derive value from these functional genomics datasets, they must be able to model this data in biologically relevant ways; to do so requires that the equine genome be more fully annotated. There are two interrelated types of genomic annotation: structural and functional. Structural annotation is delineating and demarcating the genomic elements (such as genes, promoters, and regulatory elements). Functional annotation is assigning function to structural elements. The Gene Ontology (GO) is the <it>de facto </it>standard for functional annotation, and is routinely used as a basis for modelling and hypothesis testing, large functional genomics datasets.</p> <p>Results</p> <p>An Equine Whole Genome Oligonucleotide (EWGO) array with 21,351 elements was developed at Texas A&M University. This 70-mer oligoarray was designed using the approximately 7Ă— assembled and annotated sequence of the equine genome to be one of the most comprehensive arrays available for expressed equine sequences. To assist researchers in determining the biological meaning of data derived from this array, we have structurally annotated it by mapping the elements to multiple database accessions, including UniProtKB, Entrez Gene, NRPD (Non-Redundant Protein Database) and UniGene. We next provided GO functional annotations for the gene transcripts represented on this array. Overall, we GO annotated 14,531 gene products (68.1% of the gene products represented on the EWGO array) with 57,912 annotations. GAQ (GO Annotation Quality) scores were calculated for this array both before and after we added GO annotation. The additional annotations improved the <it>meanGAQ </it>score 16-fold. This data is publicly available at <it>AgBase </it><url>http://www.agbase.msstate.edu/</url>.</p> <p>Conclusion</p> <p>Providing additional information about the public databases which link to the gene products represented on the array allows users more flexibility when using gene expression modelling and hypothesis-testing computational tools. Moreover, since different databases provide different types of information, users have access to multiple data sources. In addition, our GO annotation underpins functional modelling for most gene expression analysis tools and enables equine researchers to model large lists of differentially expressed transcripts in biologically relevant ways.</p
Chiral Plasmonic Pinwheels Exhibit Orientation-Independent Linear Differential Scattering under Asymmetric Illumination
Plasmonic nanoantennas have considerably stronger polar-
ization-dependent optical properties than their molecular counterparts,
inspiring photonic platforms for enhancing molecular dichroism and providing
fundamental insight into light-matter interactions. One such insight is that
even achiral nanoparticles can yield strong optical activity when they are
asymmetrically illuminated from a single oblique angle instead of evenly
illuminated. This effect, called extrinsic chirality, results from the overall
chirality of the experimental geometry and strongly depends on the orientation
of the incident light. Although extrinsic chirality has been well-characterized,
an analogous effect involving linear polarization sensitivity has not yet been
discussed. In this study, we investigate the differential scattering of rotationally
symmetric chiral plasmonic pinwheels when asymmetrically irradiated with
linearly polarized light. Despite their high rotational symmetry, we observe
substantial linear differential scattering that is maintained over all pinwheel
orientations. We demonstrate that this orientation-independent linear differential scattering arises from the broken mirror and rotational symmetries of our overall experimental geometry. Our results underscore the necessity of considering both the rotational symmetry of the nanoantenna and the experimental setup, including illumination direction and angle, when performing plasmon- enhanced chiroptical characterizations. Our results demonstrate spectroscopic signatures of an effect analogous to extrinsic chirality for linear polarizations
Investigating energetic electron precipitation through combining ground-based and balloon observations
A detailed comparison is undertaken of the energetic electron spectra and fluxes of two precipitation events that were observed in 18/19 January 2013. A novel but powerful technique of combining simultaneous ground-based subionospheric radio wave data and riometer absorption measurements with X-ray fluxes from a Balloon Array for Relativistic Radiation-belt Electron Losses (BARREL) balloon is used for the first time as an example of the analysis procedure. The two precipitation events are observed by all three instruments, and the relative timing is used to provide information/insight into the spatial extent and evolution of the precipitation regions. The two regions were found to be moving westward with drift periods of 5–11 h and with longitudinal dimensions of ~20° and ~70° (1.5–3.5 h of magnetic local time). The electron precipitation spectra during the events can be best represented by a peaked energy spectrum, with the peak in flux occurring at ~1–1.2 MeV. This suggests that the radiation belt loss mechanism occurring is an energy-selective process, rather than one that precipitates the ambient trapped population. The motion, size, and energy spectra of the patches are consistent with electromagnetic ion cyclotron-induced electron precipitation driven by injected 10–100 keV protons. Radio wave modeling calculations applying the balloon-based fluxes were used for the first time and successfully reproduced the ground-based subionospheric radio wave and riometer observations, thus finding strong agreement between the observations and the BARREL measurements
External validation of a mammography-derived AI-based risk model in a U.S. breast cancer screening cohort of White and Black women
Despite the demonstrated potential of artificial intelligence (AI) in breast cancer risk assessment for personalizing screening recommendations, further validation is required regarding AI model bias and generalizability. We performed external validation on a U.S. screening cohort of a mammography-derived AI breast cancer risk model originally developed for European screening cohorts. We retrospectively identified 176 breast cancers with exams 3 months to 2 years prior to cancer diagnosis and a random sample of 4963 controls from women with at least one-year negative follow-up. A risk score for each woman was calculated via the AI risk model. Age-adjusted areas under the ROC curves (AUCs) were estimated for the entire cohort and separately for White and Black women. The Gail 5-year risk model was also evaluated for comparison. The overall AUC was 0.68 (95% CIs 0.64-0.72) for all women, 0.67 (0.61-0.72) for White women, and 0.70 (0.65-0.76) for Black women. The AI risk model significantly outperformed the Gail risk model for all wome
Naturally occurring diacetyl and 2,3-pentanedione concentrations associated with roasting and grinding unflavored coffee beans in a commercial setting
AbstractOver the last decade, concerns have been raised about potential respiratory health effects associated with occupational exposure to the flavoring additives diacetyl and 2,3-pentanedione. Both of these diketones are also natural components of many foods and beverages, including roasted coffee. To date, there are no published studies characterizing workplace exposures to these diketones during commercial roasting and grinding of unflavored coffee beans. In this study, we measured naturally occurring diacetyl, 2,3-pentanedione, and respirable dust at a facility that roasts and grinds coffee beans with no added flavoring agents. Sampling was conducted over the course of three roasting batches and three grinding batches at varying distances from a commercial roaster and grinder. The three batches consisted of lightly roasted soft beans, lightly roasted hard beans, and dark roasted hard beans. Roasting occurred for 37 to 41min, and the grinding process took between 8 and 11min. Diacetyl, 2,3-pentanedione, and respirable dust concentrations measured during roasting ranged from less than the limit of detection (<LOD) to 0.0039ppm, <LOD to 0.018ppm, and <LOD to 0.31mg/m3, respectively. During grinding, diacetyl, 2,3-pentanedione, and respirable dust concentrations ranged from 0.018 to 0.39ppm, 0.0089 to 0.21ppm, and <LOD to 1.7mg/m3, respectively. For any given bean/roast combination and sample location, diketone concentrations during grinding were higher than those measured during roasting. During grinding, concentrations decreased with increased distance from the source. Measured concentrations of both diketones were higher during grinding of soft beans than hard beans. The results indicate that airborne concentrations of naturally occurring diacetyl and 2,3-pentanedione associated with unflavored coffee processing: (1) are similar to the concentrations that have been measured in food flavoring facilities; (2) are likely to exceed some recommended short-term occupational exposure limits, but; (3) based on previous analyses of exposure response relationships in animal studies, are far below the concentrations that are expected to cause even minimal responses in the human respiratory tract
“I'm always up against a brick wall with them”: Parents' experiences of accessing support for their child with a newly recognised developmental disorder
Three of the most prevalent developmental disorders (DDs) include autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD) and fetal alcohol spectrum disorder (FASD). As part of a study screening for DDs in Greater Manchester, UK, a unique opportunity was taken to explore parents’ experiences of receiving reports about their child’s previously unrecognised DD. Six parents out of a possible 16 took part in interviews, which were analysed thematically. Findings revealed a number of barriers to accessing support for their child's additional needs, including resistance from school especially for quiet, well-behaved girls, and difficulty accessing assessment or referrals. There needs to be greater awareness of additional needs in children without externalising behaviours; the presence of gender-specific differences in presentation of DDs; and FASD as a commonly occurring DD. Ultimately, better support for these children would reduce the burden of unmet needs for the children, their families and wider services
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