441 research outputs found

    The Effects of Child Sexual Abuse on Children with Autism

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    The purpose of conducting this research was to understand the effects of Child Sexual Abuse (CSA) on children with autism, and how behaviors attributed with CSA easily get mistaken as behaviors attributed with autism, leaving them more vulnerable to CSA. The research question used in this study is: How does Child Sexual abuse affect children with autism? This paper is a systematic review, which entailed using a sampling of professional and scholarly articles published in recent years to answer a question or understand a subject matter, in this context being the effects of CSA, with the focus demographic being children with autism. In searching for related articles, inclusion criteria were used that included topics such as the prevalence of child sexual abuse, the effects, and other related terms, with exclusion criteria being adult sexual abuse (sexual abuse taking place after turning eighteen). During this research, the measurement tools of PRISMA and AMSTAR were used to further assess and ensure the relevance of the articles to this research paper. As a result of the research conducted, it was deduced that children with autism are at a higher risk of being a victim of sexual abuse than a child without due to their functional impairments in social interaction and communication. Furthermore, with these findings, research indicates that individuals with ASD may require additional support, education, and protection that they are currently not receiving. The lack of research regarding the subject matter also indicates the need for more research on the subject of CSA in children with autism, of which this paper hopes to contribute to

    Mindfulness Resources in the Academic Library

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    Listeners describe tingles as the ASMR experience, but many others enjoy ASMR even if they don\u27t get tingles. ASMR videos have grown in popularity over the years. Recently, they made a resurgence on TikTok, even in parody form (think of the viral Mercedes ASMR video and all of the responses). Becca and Robin have utilized ASMR videos for relaxation and stress-management for the past 10 years. Beryl and Becca thought this could be a great resource for students

    Fermi level quantum numbers and secondary gap of conducting carbon nanotubes

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    For the single-wall carbon nanotubes conducting in the simplest tight binding model, the complete set of line group symmetry based quantum numbers for the bands crossing at Fermi level are given. Besides linear (k), helical (k'} and angular momenta, emerging from roto-translational symmetries, the parities of U axis and (in the zig-zag and armchair cases only) mirror planes appear in the assignation. The helical and angular momentum quantum numbers of the crossing bands never vanishes, what supports proposed chirality of currents. Except for the armchair tubes, the crossing bands have the same quantum numbers and, according to the non-crossing rule, a secondary gap arises, as it is shown by the accurate tight-binding calculation. In the armchair case the different vertical mirror parity of the crossing bands provides substantial conductivity, though kF is slightly decreased.Comment: 6 pages, 2 figure

    The structure relaxation of carbon nanotube

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    A simple macroscopic continuum elasticity theory (CET) is used to calculate the structure relaxation of single-wall carbon nanotube (SWNT), an analytic formula is obtained. We also expand an atomic scale three-parameter empirical model [ T. Lenosky {\emph et al.} Nature 355, 333(1992)] in order to correctly describe the bond-length change effects. The structure relaxation of SWNT expected by the model is good in agreement with our CET results, and very well consistent with the previous calculation from a first principles local density function approximation. Using the expanded Lenosky model, we calculate the strain energy of bending tube. The obtained results are good in agreement with the previous theoretical expectation. It shows the model may be a good simple replacement of some more sophisticated methods on determining carbon networks deformations.Comment: 9 pages, 4 eps figure

    Pnicogen-bridged antiferromagnetic superexchange interactions in iron pnictides

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    The first-principles electronic structure calculations made substantial contribution to study of high TcT_c iron-pnictide superconductors. By the calculations, LaFeAsO was first predicted to be an antiferromagnetic semimetal, and the novel bi-collinear antiferromagnetic order was predicted for α\alpha-FeTe. Moreover, based on the calculations the underlying mechanism was proposed to be Arsenic-bridged antiferromagnetic superexchange interaction between the next-nearest neighbor Fe moments. In this article, this physical picture is further presented and discussed in association with the elaborate first-principles calculations on LaFePO. The further discussion of origin of the magnetism in iron-pnictides and in connection with superconductivity is presented as well.Comment: 5 pages and 6 figures, to appear in Journal of Physics and Chemistry in Solid

    African American women's perceptions of cancer clinical trials

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    Cancer clinical trials are important for resolving cancer health disparities for several reasons; however, clinical trial participation among African Americans is significantly lower than Caucasians. This study engaged focus groups of 82 female African American cancer survivors or cancer caregivers, including those in better resourced, more urban areas and less resourced, more rural areas. Informed by an integrated conceptual model, the focus groups examined perceptions of cancer clinical trials and identified leverage points that future interventions may use to improve enrollment rates. Study findings highlight variation in community knowledge regarding cancer clinical trials, and the importance of community education regarding clinical trials and overcoming historical stigma associated with clinical research specifically and the health care system more generally. Study participants commented on the centrality of churches in their communities, and thus the promise of the church as loci of such education. Findings also suggested the value of informed community leaders as community information sources, including community members who have a previous diagnosis of cancer and clinical trial experience. The sample size and location of the focus groups may limit the generalizability of the results. Since the women in the focus groups were either cancer survivors or caregivers, they may have different experiences than nonparticipants who lack the close connection with cancer. Trust in the health system and in one's physician was seen as important factors associated with patient willingness to enroll in clinical trials, and participants suggested that physicians who were compassionate and who engaged and educated their patients would build important trust requisite for patient participation in clinical trials

    Bandgap Change of Carbon Nanotubes: Effect of Small Tensile and Torsional Strain

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    We use a simple picture based on the π\pi electron approximation to study the bandgap variation of carbon nanotubes with uniaxial and torsional strain. We find (i) that the magnitude of slope of bandgap versus strain has an almost universal behaviour that depends on the chiral angle, (ii) that the sign of slope depends on the value of (nm)mod3(n-m) \bmod 3 and (iii) a novel change in sign of the slope of bandgap versus uniaxial strain arising from a change in the value of the quantum number corresponding to the minimum bandgap. Four orbital calculations are also presented to show that the π\pi orbital results are valid.Comment: Revised. Method explained in detai

    Superconductivity in carbon nanotube ropes

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    We investigate the conditions in which superconductivity may develop in ropes of carbon nanotubes. It is shown that the interaction among a large number of metallic nanotubes favors the appearance of a metallic phase in the ropes, intermediate between respective phases with spin-density-wave and superconducting correlations. These arise in samples with about 100 metallic nanotubes or more, where the long-range Coulomb interaction is very effectively reduced and it may be overcome by the attractive interaction from the exchange of optical phonons within each nanotube. We estimate that the probability for the tunneling of Cooper pairs between neighboring nanotubes is much higher than that for single electrons in a disordered rope. The effect of pair hopping is therefore what establishes the intertube coherence, and the tunneling amplitude of the Cooper pairs dictates the scale of the transition to the superconducting state.Comment: 12 page

    The strain energy and Young's Moduli of single-wall Carbon nanotubules calculated from the electronic energy-band theory

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    The strain energies in straight and bent single-walled carbon nanotubes (SWNTs) are calculated by taking account of the total energy of all the occupied band electrons. The obtained results are in good agreement with previous theoretical studies and experimental observations. The Young's modulus and the effective wall thickness of SWNT are obtained from the bending strain energies of SWNTs with various cross-sectional radii. The repulsion potential between ions contributes the main part of the Young's modulus of SWNT. The wall thickness of SWNT comes completely from the overlap of electronic orbits, and is approximately of the extension of π\pi orbit of carbon atom. Both the Young's modulus and the wall thickness are independent of the radius and the helicity of SWNT, and insensitive to the fitting parameters. The results show that continuum elasticity theory can serve well to describe the mechanical properties of SWNTs.Comment: 12 pages, 2 figure

    Aharonov-Bohm spectral features and coherence lengths in carbon nanotubes

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    The electronic properties of carbon nanotubes are investigated in the presence of disorder and a magnetic field parallel or perpendicular to the nanotube axis. In the parallel field geometry, the ϕ0(=hc/e)\phi_{0}(=hc/e)-periodic metal-insulator transition (MIT) induced in metallic or semiconducting nanotubes is shown to be related to a chirality-dependent shifting of the energy of the van Hove singularities (VHSs). The effect of disorder on this magnetic field-related mechanism is considered with a discussion of mean free paths, localization lengths and magnetic dephasing rate in the context of recent experiments.Comment: 22 pages, 6 Postscript figures. submitted to Phys. Rev.
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