Effects of Rocking on Attention and Arousal

Introduction: Difficulties regulating attention and arousal underlie common developmental conditions and impact performance in academic and work tasks. Sensory-based activities such as sitting in a rocker chair may help regulate attention and arousal by providing sensory stimulation. This pilot study assessed autonomic nervous system activity (ANS) while seated in a specially designed rocking chair providing vestibular sensation during a performance task. Methods: Thirty-four adults (aged 20-35 years) were randomized to either a rocker chair (Virco Zuma, n = 17) or static chair (n =17) while performing cognitive tasks in a counterbalanced design. ANS measures of skin conductance level (SCL) and respiratory sinus arrhythmia (RSA) were taken at 3-minute periods at baseline, performance, and recovery to assess sympathetic and parasympathetic activation respectively. Results: For the group using the stationary chair first, sympathetic activity increased from baseline to task (p=.000) and baseline to recovery (p=.002). Likewise with the Zuma chair first group, sympathetic activity increased from baseline to task (p=.000) and baseline to recovery (p=.000). For the Zuma chair group only, sympathetic activity decreased from task to recovery (p=.000). RSA did not have any statistically significant changes for either group. Discussion: While these findings were not consistent with the hypothesis that chair type impacts a change in ANS during performance, only the Zuma chair first group had a significant decrease in sympathetic activity from task to recovery. This suggests that using a rocker chair may help decrease arousal level after the task. Further research with larger samples sizes and longer duration tasks is needed to further validate this finding

Risk Factors of Recurrent Falls Among Older Adults Admitted to the Trauma Surgery Department.

Falls affect more than 29 million American adults ages ≥65 years annually. Many older adults experience recurrent falls requiring medical attention. These recurrent falls may be prevented through screening and intervention. In 2014 to 2015, records for 199 older adult patients admitted from a major urban teaching hospital’s emergency department were queried. Open-ended variables from clinicians’ notes were coded to supplement existing closed-ended variables. Of the 199 patients, 52 (26.1%) experienced one or more recurrent falls within 365 days after their initial fall. Half (50.0%) of all recurrent falls occurred within the first 90 days following discharge. A large proportion of recurrent falls among older adults appear to occur within a few months and are statistically related to identifiable risk factors. Prevention and intervention strategies, delivered either during treatment for an initial fall or upon discharge from an inpatient admission, may reduce the incidence of recurrent falls among this population

Internacionalização, globalização e cultura

Este artigo tem por objetivo contribuir para o debate sobre o valor da internacionalização, inserindo-o em um quadro teórico mais amplo. A partir de exemplos da psicologia do desenvolvimento, examinamos diversos paradigmas, ou visões de mundo, para mostrar como concepções sobre internacionalização diferem se as ideias dos pesquisadores alinham-se ao paradigma neo-positivista ou a paradigmas não-positivistas. As suas diferentes posições ontológicas e epistemológicas influenciam enormemente a maneira como a internalização é praticada (os métodos de pensar e conduzir pesquisa). Uma vez que perspectivas neo-positivistas são atualmente dominantes em psicologia do desenvolvimento, apresentamos exemplos de como abordagens não-positivistas podem ser usadas para (a) realizar pesquisa em diferentes culturas e (b) encorajar a trans-fertilização de ideias entre países

Fluorescent in situ sequencing (FISSEQ) of RNA for gene expression profiling in intact cells and tissues

RNA-sequencing (RNA-seq) measures the quantitative change in gene expression over the whole transcriptome, but it lacks spatial context. In contrast, in situ hybridization provides the location of gene expression, but only for a small number of genes. Here we detail a protocol for genome-wide profiling of gene expression in situ in fixed cells and tissues, in which RNA is converted into cross-linked cDNA amplicons and sequenced manually on a confocal microscope. Unlike traditional RNA-seq, our method enriches for context-specific transcripts over housekeeping and/or structural RNA, and it preserves the tissue architecture for RNA localization studies. Our protocol is written for researchers experienced in cell microscopy with minimal computing skills. Library construction and sequencing can be completed within 14 d, with image analysis requiring an additional 2 d

Reproducibility in density functional theory calculations of solids

NTRODUCTION The reproducibility of results is one of the underlying principles of science. An observation can only be accepted by the scientific community when it can be confirmed by independent studies. However, reproducibility does not come easily. Recent works have painfully exposed cases where previous conclusions were not upheld. The scrutiny of the scientific community has also turned to research involving computer programs, finding that reproducibility depends more strongly on implementation than commonly thought. These problems are especially relevant for property predictions of crystals and molecules, which hinge on precise computer implementations of the governing equation of quantum physics. RATIONALE This work focuses on density functional theory (DFT), a particularly popular quantum method for both academic and industrial applications. More than 15,000 DFT papers are published each year, and DFT is now increasingly used in an automated fashion to build large databases or apply multiscale techniques with limited human supervision. Therefore, the reproducibility of DFT results underlies the scientific credibility of a substantial fraction of current work in the natural and engineering sciences. A plethora of DFT computer codes are available, many of them differing considerably in their details of implementation, and each yielding a certain “precision” relative to other codes. How is one to decide for more than a few simple cases which code predicts the correct result, and which does not? We devised a procedure to assess the precision of DFT methods and used this to demonstrate reproducibility among many of the most widely used DFT codes. The essential part of this assessment is a pairwise comparison of a wide range of methods with respect to their predictions of the equations of state of the elemental crystals. This effort required the combined expertise of a large group of code developers and expert users. RESULTS We calculated equation-of-state data for four classes of DFT implementations, totaling 40 methods. Most codes agree very well, with pairwise differences that are comparable to those between different high-precision experiments. Even in the case of pseudization approaches, which largely depend on the atomic potentials used, a similar precision can be obtained as when using the full potential. The remaining deviations are due to subtle effects, such as specific numerical implementations or the treatment of relativistic terms. CONCLUSION Our work demonstrates that the precision of DFT implementations can be determined, even in the absence of one absolute reference code. Although this was not the case 5 to 10 years ago, most of the commonly used codes and methods are now found to predict essentially identical results. The established precision of DFT codes not only ensures the reproducibility of DFT predictions but also puts several past and future developments on a firmer footing. Any newly developed methodology can now be tested against the benchmark to verify whether it reaches the same level of precision. New DFT applications can be shown to have used a sufficiently precise method. Moreover, high-precision DFT calculations are essential for developing improvements to DFT methodology, such as new density functionals, which may further increase the predictive power of the simulations