Ground reaction force estimates from ActiGraph GT3X+ hip accelerations.

Simple methods to quantify ground reaction forces (GRFs) outside a laboratory setting are needed to understand daily loading sustained by the body. Here, we present methods to estimate peak vertical GRF (pGRFvert) and peak braking GRF (pGRFbrake) in adults using raw hip activity monitor (AM) acceleration data. The purpose of this study was to develop a statistically based model to estimate pGRFvert and pGRFbrake during walking and running from ActiGraph GT3X+ AM acceleration data. 19 males and 20 females (age 21.2 ± 1.3 years, height 1.73 ± 0.12 m, mass 67.6 ± 11.5 kg) wore an ActiGraph GT3X+ AM over their right hip. Six walking and six running trials (0.95-2.19 and 2.20-4.10 m/s, respectively) were completed. Average of the peak vertical and anterior/posterior AM acceleration (ACCvert and ACCbrake, respectively) and pGRFvert and pGRFbrake during the stance phase of gait were determined. Thirty randomly selected subjects served as the training dataset to develop generalized equations to predict pGRFvert and pGRFbrake. Using a holdout approach, the remaining 9 subjects were used to test the accuracy of the models. Generalized equations to predict pGRFvert and pGRFbrake included ACCvert and ACCbrake, respectively, mass, type of locomotion (walk or run), and type of locomotion acceleration interaction. The average absolute percent differences between actual and predicted pGRFvert and pGRFbrake were 8.3% and 17.8%, respectively, when the models were applied to the test dataset. Repeated measures generalized regression equations were developed to predict pGRFvert and pGRFbrake from ActiGraph GT3X+ AM acceleration for young adults walking and running. These equations provide a means to estimate GRFs without a force plate

Exploring traumas in the development of talent: What are they, what do they do, and what do they require?

It has recently been argued that performers benefit from trauma (i.e., memorable challenges) during development. To deepen knowledge in this area, we explored perceived traumas in the development of twenty senior-international performers with a multi-methods, temporal-based design. Results showed perceived traumas were primarily sports-based, recognized from onset of investment, associated with immediately negative but ultimately positive impact, and negotiated through skills that were brought to, rather than generated by, these experiences. The findings provide an interesting contrast to messages in other early trauma-focused research and promote focus on the process and mechanisms of responding to and recovering from traumatic experiences

Effects of Sound Symbolism in Names on Personality Perception

We investigated effects of sound symbolism in names on personality perception. Participants were randomly assigned to a group that either had invented or non-invented round or sharp names. They were asked to fill out a BFI-10 and a BSRI-12 questionnaire for five different names followed by reading 10 descriptions of personality traits and circling either a round name or a sharp name that fit the description best. Results showed that sound type present in names affected perceptions of Extraversion and that name and sound type affected perceptions of Femininity. These results provide evidence of sound symbolic associations present in names

Humanized microbiota mice as a model of recurrent \u3ci\u3eClostridium difficile\u3c/i\u3e disease

Background: Clostridium difficile disease is the leading antibiotic-associated cause of diarrhea and nosocomial acquired infection in the western world. The per annum burden in the USA alone amounts to 250,000 cases with 14,000 ascribed deaths and medical costs in excess of a billion dollars. Novel models for the study of C. difficile infection are therefore pertinent. Results: Germ free C57BL/6 mice gavaged with a healthy human fecal microbiota maintained a stable “humanized” microbiota over multiple generations when housed under specific pathogen-free (SPF) conditions. As with mice containing a conventional microbiota, treatment with a five-antibiotic cocktail followed by a single dose of clindamycin renders the animals susceptible to C. difficile infection (CDI). Interestingly, after recovery from the initial CDI infection, a single intraperitoneal injection of clindamycin is sufficient to induce CDI relapse. Relapse of CDI can be induced up to 35 days postinfection after recovery from the initial infection, and multiple episodes of relapse can be induced. Conclusions: This model enables the study of recurrent C. difficile disease in a host containing a human-derived microbiota. Probiotic treatments using human-derived microbes, either prophylactic or curative, can be tested within the model. The identification and testing of human-derived microbial communities within a humanized microbiota mouse model may enable a higher rate of successful transfer of bacteria-based treatments from the lab to human patients due to the microbes involved initiating from, and being adapted to, the human GI tract

Climate change drives poleward increases and equatorward declines in marine species

Marine environments have increased in temperature by an average of 1°C since preindustrial (1850) times [1]. Given that species ranges are closely allied to physiological thermal tolerances in marine organisms [2], it may therefore be expected that ocean warming would lead to abundance increases at poleward range edges, and abundance declines towards the equator [3]. Here we report a global analysis of abundance tends of 304 widely distributed marine species over the last century, across a range of taxonomic groups from phytoplankton to fish and marine mammals. Specifically, using a literature database we investigate the extent that the direction and strength of longterm species abundance changes depend on the sampled location within the latitudinal range of species. Our results show that abundance increases have been most prominent where sampling has taken place at the poleward edges of species ranges, while abundance declines have been most prominent where sampling has taken place at the equatorward edge of species ranges. These data provide evidence of omnipresent large-scale changes in abundance of marine species consistent with warming over the last century, and suggest that adaptation has not provided a buffer against the negative effects of warmer conditions at the equatorward extent of species ranges. On the basis of these results we suggest that projected sea temperature increases of up to 1.5°C over pre-industrial levels by 2050 [4] will continue to drive latitudinal abundance shifts in marine species, including those of importance for coastal livelihoods

A half-century diversion of monetary policy? An empirical horse-race to identify the UK variable most likely to deliver the desired nominal GDP growth rate

open access articleThe financial crisis of 2007–2008 triggered monetary policy designed to boost nominal demand, including ‘Quantitative Easing’, ‘Credit Easing’, ‘Forward Guidance’ and ‘Funding for Lending’. A key aim of these policies was to boost the quantity of bank credit to the non-financial corporate and household sectors. In the previous decades, however, policy-makers had not focused on bank credit. Indeed, over the past half century, different variables were raised to prominence in the quest to achieve desired nominal GDP outcomes. This paper conducts a long-overdue horse race between the various contenders in terms of their ability to account for observed nominal GDP growth, using a half-century of UK data since 1963. Employing the ‘General-to-Specific’ methodology, an equilibrium-correction model is estimated suggesting a long-run cointegrating relationship between disaggregated real economy credit and nominal GDP. Short-term and long-term interest rates and broad money do not appear to influence nominal GDP significantly. Vector autoregression and vector error correction modelling shows the real economy credit growth variable to be strongly exogenous to nominal GDP growth. Policy-makers are hence right to finally emphasise the role of bank credit, although they need to disaggregate it and specifically target bank credit for GDP-transactions

New Criminal Law Review Symposium on Privilege or Punish: Criminal Justice and the Challenge of Family Ties

This symposium includes three review essays by Professors Doug Berman, Naomi Cahn, and Jack Chin. The review essays are focused on a recent book by Professors Dan Markel, Jennifer M. Collins and Ethan J. Leib entitled \u27Privilege or Punish: Criminal Justice and the Challenge of Family Ties\u27 (Oxford 2009). You can download the entire book for free at http://ssrn.com/abstract=1677503. In addition to the three review essays, the collection includes an essay by the book\u27s authors that serves as a reply to this set of critiques. Collectively, we are grateful to the New Criminal Law Review, which is hosting this collection in an upcoming issue. The essays are titled, respectively: Berman: Digging Deeper into, and Thinking Better about, the Interplay of Families and Criminal Justice Cahn: Protect and Preserve? Chin: Mandatory, Contingent, and Discretionary Policy Arguments Collins, Leib & Markel: (When) Should Family Status Matter in the Criminal Justice System

New Criminal Law Review Symposium on Privilege or Punish: Criminal Justice and the Challenge of Family Ties

This symposium includes three review essays by Professors Doug Berman, Naomi Cahn, and Jack Chin. The review essays are focused on a recent book by Professors Dan Markel, Jennifer M. Collins and Ethan J. Leib entitled \u27Privilege or Punish: Criminal Justice and the Challenge of Family Ties\u27 (Oxford 2009). You can download the entire book for free at http://ssrn.com/abstract=1677503. In addition to the three review essays, the collection includes an essay by the book\u27s authors that serves as a reply to this set of critiques. Collectively, we are grateful to the New Criminal Law Review, which is hosting this collection in an upcoming issue. The essays are titled, respectively: Berman: Digging Deeper into, and Thinking Better about, the Interplay of Families and Criminal Justice Cahn: Protect and Preserve? Chin: Mandatory, Contingent, and Discretionary Policy Arguments Collins, Leib & Markel: (When) Should Family Status Matter in the Criminal Justice System