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https://www.readbyqxmd.com/read/27906516/what-is-the-flynn-effect-and-how-does-it-change-our-understanding-of-iq
#1
REVIEW
David Shenk
In 1981, psychologist James Flynn noticed that IQ scores had risen streadily over nearly a century a staggering difference of 18 points over two generations. After a careful analysis, he concluded the cause to be culture. Society had become more intelligent-come to grips with bigger, more abstract ideas over time-and had made people smarter. This observation, combined with solid evidence that IQ scores are also not fixed within an individual, neatly dispels the idea of intelligence being an innate and fixed entity...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906512/expertise-and-individual-differences-the-search-for-the-structure-and-acquisition-of-experts-superior-performance
#2
REVIEW
K Anders Ericsson
What is expertise and where does it come from? Modern research techniques have made it possible to objectively measure performance in new ways, revealing that expertise derives neither from basic cognitive ability nor from the sheer amount of experience. Rather, it develops-particular forms of training and practice induce cognitive, perceptual, physiological, neurological, and anatomical changes necessary for the acquisition of complex domain-specific skills. For further resources related to this article, please visit the WIREs website...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906506/robustness-and-plasticity-in-development
#3
REVIEW
Patrick Bateson
Like the game of chess, the overall development of human behavior is highly regulated, and also many finer points of any particular individual life depend on early moves. The robust mechanisms that make species different from each other also impact processes that make individuals distinct from one another. Children both influence their environment and are influenced by it. As the development of any particular skill depends upon the contribution of particular environmental inputs at particular times, environmental variability can dramatically change the process...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906499/individual-differences-in-human-brain-development
#4
REVIEW
Timothy T Brown
This article discusses recent scientific advances in the study of individual differences in human brain development. Focusing on structural neuroimaging measures of brain morphology and tissue properties, two kinds of variability are related and explored: differences across individuals of the same age and differences across age as a result of development. A recent multidimensional modeling study is explained, which was able to use brain measures to predict an individual's chronological age within about one year on average, in children, adolescents, and young adults between 3 and 20 years old...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906461/measurement-of-intestinal-and-peripheral-cholesterol-fluxes-by-a-dual-tracer-balance-method
#5
Onne A H O Ronda, Theo H van Dijk, H J Verkade, Albert K Groen
Long-term elevated plasma cholesterol levels put individuals at risk for developing atherosclerosis. Plasma cholesterol levels are determined by the balance between cholesterol input and output fluxes. Here we describe in detail the methodology to determine the different cholesterol fluxes in mice. The percentage of absorbed cholesterol is calculated from a stable isotope-based double-label method. Cholesterol synthesis is calculated from MIDA after (13) C-acetate enrichment. Cholesterol is removed from the body via the feces...
December 1, 2016: Current Protocols in Mouse Biology
https://www.readbyqxmd.com/read/27906427/the-role-of-diet-on-gut-microbiota-composition
#6
S Bibbò, G Ianiro, V Giorgio, F Scaldaferri, L Masucci, A Gasbarrini, G Cammarota
Gut microbiota is characterized by an inter-individual variability due to genetic and environmental factors. Among the environmental ones, dietary habits play a key role in the modulation of gut microbiota composition. There are main differences between the intestinal microbiota of subjects fed with prevalent Western diet and that of subjects with a diet rich in fibers. Specific changes in the composition of gut microbiota have been demonstrated among subjects according to a different dietary intake. A particular diet may promote the growth of specific bacterial strains, driving hosts to a consequent alteration of fermentative metabolism, with a direct effect on intestinal pH, which can be responsible for the development of a pathogenic flora...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27906306/substrate-surface-patterning-by-optical-near-field-modulation-around-colloidal-particles-immersed-in-a-liquid
#7
M Ulmeanu, P Petkov, D Ursescu, F Jipa, R Harniman, E Brousseau, M N R Ashfold
Optical near field enhancements in the vicinity of particles illuminated by laser light are increasingly recognized as a powerful tool for nanopatterning applications, but achieving sub-wavelength details from the near-field distribution remains a challenge. Here we present a quantitative analysis of the spatial modulation of the near optical fields generated using single 8 ps, 355 nm (and 532 nm) laser pulses around individual colloidal particles and small close packed arrays of such particles on silicon substrates...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906281/self-aligned-multi-channel-superconducting-nanowire-single-photon-detectors
#8
Risheng Cheng, Xiang Guo, Xiaosong Ma, Linran Fan, King Y Fong, Menno Poot, Hong X Tang
We describe a micromachining process to allow back-side coupling of an array of single-mode telecommunication fibers to individual superconducting nanowire single photon detectors (SNSPDs). This approach enables a back-illuminated detector structure which separates the optical access and electrical readout on two sides of the chip and thus allows for compact integration of multi-channel detectors. As proof of principle, we show the integration of four detectors on the same silicon chip with two different designs and their performances are compared...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906104/the-effects-of-computer-based-mindfulness-training-on-self-control-and-mindfulness-within-ambulatorily-assessed-network-systems-across-health-related-domains-in-a-healthy-student-population-smash-study-protocol-for-a-randomized-controlled-trial
#9
Zarah Rowland, Mario Wenzel, Thomas Kubiak
BACKGROUND: Self-control is an important ability in everyday life, showing associations with health-related outcomes. The aim of the Self-control and Mindfulness within Ambulatorily assessed network Systems across Health-related domains (SMASH) study is twofold: first, the effectiveness of a computer-based mindfulness training will be evaluated in a randomized controlled trial. Second, the SMASH study implements a novel network approach in order to investigate complex temporal interdependencies of self-control networks across several domains...
December 1, 2016: Trials
https://www.readbyqxmd.com/read/27906074/size-sounds-and-sex-interactions-between-body-size-and-harmonic-convergence-signals-determine-mating-success-in-aedes-aegypti
#10
Lauren J Cator, Zacharo Zanti
BACKGROUND: Several new mosquito control strategies will involve the release of laboratory reared males which will be required to compete with wild males for mates. Currently, the determinants of male mating success remain unclear. The presence of convergence between male and female harmonic flight tone frequencies during a mating attempt have been found to increase male mating success in the yellow fever mosquito, Aedes aegypti. Size has also been implicated as a factor in male mating success...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27906060/discrete-adipose-derived-stem-cell-subpopulations-may-display-differential-functionality-after-in-vitro-expansion-despite-convergence-to-a-common-phenotype-distribution
#11
Frederik Mølgaard Nielsen, Simone Elkjær Riis, Jens Isak Andersen, Raphaëlle Lesage, Trine Fink, Cristian Pablo Pennisi, Vladimir Zachar
BACKGROUND: Complex immunophenotypic repertoires defining discrete adipose-derived stem cell (ASC) subpopulations may hold a key toward identifying predictors of clinical utility. To this end, we sorted out of the freshly established ASCs four subpopulations (SPs) according to a specific pattern of co-expression of six surface markers, the CD34, CD73, CD90, CD105, CD146, and CD271, using polychromatic flow cytometry. METHOD: Using flow cytometry-associated cell sorting and analysis, gating parameters were set to select for a CD73(+)CD90(+)CD105(+) phenotype plus one of the four following combinations, CD34(-)CD146(-)CD271(-) (SP1), CD34(-)CD146(+)CD271(-) (SP2), CD34(+)CD146(+)CD271(-) (SP3), and CD34(-)CD146(+)CD271(+) (SP4)...
December 1, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27906058/vascular-endothelial-growth-factor-levels-and-rheumatic-diseases-of-the-elderly
#12
Perrine Smets, Valérie Devauchelle-Pensec, Paul-Olivier Rouzaire, Bruno Pereira, Marc Andre, Martin Soubrier
BACKGROUND: Increasing vascular endothelial growth factor (VEGF) has been reported in remitting symmetrical seronegative synovitis with pitting edema (RS3PE) syndrome, rheumatoid arthritis (RA), polymyalgia rheumatica (PMR) and giant cell arteritis (GCA). The aim of this study was to compare VEGF levels in patients over 60 years of age who have RS3PE, RA, PMR or GCA so as to determine whether elevated VEGF is specific for a rheumatic disease, the inflammation or edema that occurs with these pathological conditions...
December 1, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27906039/peering-below-the-diffraction-limit-robust-and-specific-sorting-of-viruses-with-flow-cytometry
#13
Shea T Lance, David J Sukovich, Kenneth M Stedman, Adam R Abate
BACKGROUND: Viruses are incredibly diverse organisms and impact all forms of life on Earth; however, individual virions are challenging to study due to their small size and mass, precluding almost all direct imaging or molecular analysis. Moreover, like microbes, the overwhelming majority of viruses cannot be cultured, impeding isolation, replication, and study of interesting new species. Here, we introduce PCR-activated virus sorting, a method to isolate specific viruses from a heterogeneous population...
December 1, 2016: Virology Journal
https://www.readbyqxmd.com/read/27906032/infection-of-rhesus-macaques-with-a-pool-of-simian-immunodeficiency-virus-with-the-envelope-genes-from-acute-hiv-1-infections
#14
Kendall C Krebs, Meijuan Tian, Mohammed Asmal, Binhua Ling, Kenneth Nelson, Kenneth Henry, Richard Gibson, Yuejin Li, Weining Han, Robin J Shattock, Ronald S Veazey, Norman Letvin, Eric J Arts, Yong Gao
BACKGROUND: New simian-human immunodeficiency chimeric viruses with an HIV-1 env (SHIVenv) are critical for studies on HIV pathogenesis, vaccine development, and microbicide testing. Macaques are typically exposed to single CCR5-using SHIVenv which in most instances does not reflect the conditions during acute/early HIV infection (AHI) in humans. Instead of individual and serial testing new SHIV constructs, a pool of SHIVenv_B derived from 16 acute HIV-1 infections were constructed using a novel yeast-based SHIV cloning approach and then used to infect macaques...
November 25, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27906027/antiretroviral-treatment-regardless-of-cd4-count-the-universal-answer-to-a-contextual-question
#15
REVIEW
Serge P Eholié, Anani Badje, Gérard M Kouame, Jean-Baptiste N'takpe, Raoul Moh, Christine Danel, Xavier Anglaret
After a period where it was recommended to start antiretroviral therapy (ART) early, the CD4 threshold for treating asymptomatic adults dropped to 200/mm(3) at the beginning of the 2000s. This was mostly due to a great prudence with regards to drug toxicity. The ART-start CD4 threshold in most international guidelines was then raised to 350/mm(3) in 2006-2009 and to 500/mm(3) in 2009-2013. Between 2012 and 2015, international guidelines went the last step further and recommended treating all HIV-infected adults regardless of their CD4 count...
July 26, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27906002/hiv-1-genetic-diversity-and-its-distribution-characteristics-among-newly-diagnosed-hiv-1-individuals-in-hebei-province-china
#16
Xinli Lu, Cuiying Zhao, Wei Wang, Chenxi Nie, Yuqi Zhang, Hongru Zhao, Suliang Chen, Ze Cui
BACKGROUND: Since the first HIV-1 case in 1989, Hebei province has presented a clearly rising trend of HIV-1 prevalence, and HIV-1 genetic diversity has become the vital barrier to HIV prevention and control in this area. To obtain detailed information of HIV-1 spread in different populations and in different areas of Hebei, a cross-sectional HIV-1 molecular epidemiological investigation was performed across the province. METHODS: Blood samples of 154 newly diagnosed HIV-1 individuals were collected from ten prefectures in Hebei using stratified sampling...
January 19, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27905973/the-paradox-of-verbal-autopsy-in-cause-of-death-assignment-symptom-question-unreliability-but-predictive-accuracy
#17
Peter Serina, Ian Riley, Bernardo Hernandez, Abraham D Flaxman, Devarsetty Praveen, Veronica Tallo, Rohina Joshi, Diozele Sanvictores, Andrea Stewart, Meghan D Mooney, Christopher J L Murray, Alan D Lopez
BACKGROUND: We believe that it is important that governments understand the reliability of the mortality data which they have at their disposable to guide policy debates. In many instances, verbal autopsy (VA) will be the only source of mortality data for populations, yet little is known about how the accuracy of VA diagnoses is affected by the reliability of the symptom responses. We previously described the effect of the duration of time between death and VA administration on VA validity...
October 18, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905955/future-healthy-life-expectancy-among-older-adults-in-the-us-a-forecast-based-on-cohort-smoking-and-obesity-history
#18
Bochen Cao
BACKGROUND: In the past three decades, the elderly population in the United States experienced increase in life expectancy (LE) and disability-free life expectancy (LE(ND)), but decrease in life expectancy with disability (LE(D)). Smoking and obesity are two major risk factors that had negative impacts on these trends. While smoking prevalence continues to decline in recent decades, obesity prevalence has been growing and is currently at a high level. This study aims to forecast the healthy life expectancy for older adults aged 55 to 85 in the US from 2011 to 2040, in relation to their smoking and obesity history...
July 12, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905953/improving-the-usefulness-of-us-mortality-data-new-methods-for-reclassification-of-underlying-cause-of-death
#19
Kyle J Foreman, Mohsen Naghavi, Majid Ezzati
BACKGROUND: Mortality data are affected by miscertification of the medical cause of death deaths and changes to cause of death classification systems. We present both mappings of ICD9 and ICD10 to a unified list of causes, and a new statistical model for reducing the impact of misclassification of cause of death. METHODS: We propose a Bayesian mixed-effects multinomial logistic model that can be run on individual record level death certificates to reclassify "garbage-coded" deaths onto causes that are more meaningful for public health purposes...
April 28, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905944/methods-of-applying-the-1994-case-definition-of-chronic-fatigue-syndrome-impact-on-classification-and-observed-illness-characteristics
#20
E R Unger, J-M S Lin, H Tian, B M Gurbaxani, R S Boneva, J F Jones
BACKGROUND: Multiple case definitions are in use to identify chronic fatigue syndrome (CFS). Even when using the same definition, methods used to apply definitional criteria may affect results. The Centers for Disease Control and Prevention (CDC) conducted two population-based studies estimating CFS prevalence using the 1994 case definition; one relied on direct questions for criteria of fatigue, functional impairment and symptoms (1997 Wichita; Method 1), and the other used subscale score thresholds of standardized questionnaires for criteria (2004 Georgia; Method 2)...
March 12, 2016: Population Health Metrics
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