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https://www.readbyqxmd.com/read/29045875/the-effect-of-solutes-on-the-temperature-of-miscibility-transitions-in-multicomponent-membranes
#1
David W Allender, M Schick
We address questions posed by experiments that show small-chain alcohols reduce the miscibility transition temperature when added to giant plasma membrane vesicles (GPMVs), but increase that temperature when added to giant unilamellar vesicles. In giant unilamellar vesicles the change in temperature displays a definite minimum, between decanol and tetradecanol, as a function of alcohol chain length; in GPMVs there is no such minimum. To emphasize the competition between internal entropies of the components and the interactions between them, we model the system as consisting of three different linear polymers...
October 17, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29045153/observation-of-electron-coherence-and-fabry-perot-standing-waves-at-a-graphene-edge
#2
Monica Allen, Oles Shtanko, Ion Cosma Fulga, Joel I-Jan Wang, Daniyar Nurgaliev, Kenji Watanabe, Takashi Taniguchi, Anton Akhmerov, Pablo Jarillo-Herrero, Leonid Levitov, Amir Yacoby
Electron surface states in solids are typically confined to the outermost atomic layers and, due to surface disorder, have negligible impact on electronic transport. Here we demonstrate a very different behavior for surface states in graphene. We probe the wavelike character of these states by Fabry-Perot (FP) interferometry and find that, in contrast to theoretical predictions, these states can propagate ballistically over micron-scale distances. This is achieved by embedding a graphene resonantor formed by gate-defined p-n junctions within a graphene SNS structure...
October 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/29043247/clinic-based-mobile-health-decision-support-to-enhance-adult-epilepsy-self-management-an-intervention-mapping-approach
#3
Ross Shegog, Charles E Begley
INTRODUCTION: Epilepsy is a neurological disorder involving recurrent seizures. It affects approximately 5 million people in the U.S. To optimize their quality of life people with epilepsy are encouraged to engage in self-management (S-M) behaviors. These include managing their treatment (e.g., adhering to anti-seizure medication and clinical visit schedules), managing their seizures (e.g., responding to seizure episodes), managing their safety (e.g., monitoring and avoiding environmental seizure triggers), and managing their co-morbid conditions (e...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29042340/mental-and-emotional-self-help-technology-apps-cross-sectional-study-of-theory-technology-and-mental-health-behaviors
#4
Benjamin T Crookston, Joshua H West, P Cougar Hall, Kaitana Martinez Dahle, Thomas L Heaton, Robin N Beck, Chandni Muralidharan
BACKGROUND: Mental and emotional self-help apps have emerged as potential mental illness prevention and treatment tools. The health behavior theory mechanisms by which these apps influence mental health-related behavior change have not been thoroughly examined. OBJECTIVE: The objective of this study was to examine the association between theoretical behavior change mechanisms and use of mental and emotional self-help apps and whether the use of such apps is associated with mental health behaviors...
October 17, 2017: JMIR Mental Health
https://www.readbyqxmd.com/read/29041401/tailoring-optical-pulling-force-on-gain-coated-nanoparticles-with-nonlocal-effective-medium-theory
#5
X Bian, D L Gao, L Gao
We study the optical scattering force on the coated nanoparticles with gain core and nonlocal plasmonic shell in the long-wavelength limit, and demonstrate negative optical force acting on the nanoparticles near the symmetric and/or antisymmetric surface plasmon resonances. To understand the optical force behavior, we propose nonlocal effective medium theory to derive the equivalent permittivity for the coated nanoparticles with nonlocality. We show that the imaginary part of the equivalent permittivity is negative near the surface resonant wavelength, resulting in the negative optical force...
October 2, 2017: Optics Express
https://www.readbyqxmd.com/read/29041364/perfectly-matched-layers-for-nonlocal-media-with-hydrodynamic-drude-description-a-transformation-optics-approach
#6
Pu Zhang, Xuejiang Xie, Xue-Wen Chen
We develop a transformation optics theory for the nonlocal media in the hydrodynamic Drude model by generalizing the free-electron current density equation to a transformation invariant form. Applying the transformation optics theory, perfectly matched layers (PMLs) for the nonlocal media are theoretically formulated and implemented in frequency domain with finite element method. The nonlocal PMLs are shown to absorb outgoing surface and volume plasmons without inducing unphysical reflections. The effectiveness of the nonlocal PMLs is quantitatively demonstrated by the behaviors that the numerical errors continuously approach zero with increasing linear mesh density...
October 2, 2017: Optics Express
https://www.readbyqxmd.com/read/29040653/regulatory-mechanisms-of-sperm-flagellar-motility-by-metachronal-and-synchronous-sliding-of-doublet-microtubules
#7
Gen L Takei, Masakatsu Fujinoki, Kaoru Yoshida, Sumio Ishijima
STUDY QUESTION: What is the role of metachronal and synchronous sliding in sperm flagellar motility? SUMMARY ANSWER: Both metachronal and oscillatory synchronous sliding are essential for sperm flagellar motility, while the change in mode of synchronous sliding between the non-oscillatory synchronous sliding of a specific pair of the doublet microtubules and the oscillatory synchronous sliding between most pairs of doublet microtubules modulates the sperm flagellar motility...
October 11, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29039936/what-are-the-physical-contents-of-hubbard-and-heisenberg-hamiltonian-interactions-extracted-from-broken-symmetry-dft-calculations-in-magnetic-compounds
#8
Gregoire David, Nathalie Guihery, Nicolas Ferré
Analytical expression of the interactions present in the Heisenberg Dirac van Vleck and Hubbard Hamiltonians have been derived as functions of both the energy of several broken symmetry DFT solutions and their expectation value of the S^2 spin operator. Then, following a strategy of decomposition of the magnetic exchange coupling into its main contributions (direct exchange, kinetic exchange and spin polarization) and using a recently proposed method of spin decontamination, values of these interactions have been extracted...
October 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29039759/a-dft-study-of-the-geometrical-spectroscopical-and-reactivity-properties-of-diindolylmethane-phenylboronic-acid-hybrids
#9
Amira Jalil Fragoso-Medina, René Gerardo Escobedo-González, María Inés Nicolás-Vázquez, Gabriel Arturo Arroyo-Razo, María Olivia Noguez-Córdova, René Miranda-Ruvalcaba
The structure of the ortho-, meta- and para- hybrid diindolylmethane-phenylboronic acids and their interactions were optimized with by a quantum chemical method, using density functional theory at the (DFT) level. Thus, infrared bands were assigned based on the scaled theoretical wavenumbers by correlating the respective experimental data of the molecules. In addition, the corresponding ¹H-/(13)C-/(11)B-NMR experimental and theoretical chemical shifts were correlated. The target molecules showed a poor treatment of the OH shifts in the GIAO method due to the absence of explicit solvent effects in these calculations; therefore, they were explicitly considered with acetone molecules...
October 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29039705/research-on-web-search-behavior-how-online-query-data-inform-social-psychology
#10
Kaisheng Lai, Yan Xin Lee, Hao Chen, Rongjun Yu
The widespread use of web searches in daily life has allowed researchers to study people's online social and psychological behavior. Using web search data has advantages in terms of data objectivity, ecological validity, temporal resolution, and unique application value. This review integrates existing studies on web search data that have explored topics including sexual behavior, suicidal behavior, mental health, social prejudice, social inequality, public responses to policies, and other psychosocial issues...
October 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/29039363/ab-initio-phonon-thermal-transport-in-monolayer-inse-gase-gas-and-alloys
#11
Tribhuwan Pandey, David S Parker, Lucas Lindsay
We compare vibrational properties and phonon thermal conductivities (κ) of monolayer InSe, GaSe, and GaS systems using density functional theory and Peierls-Boltzmann transport methods. In going from InSe to GaSe to GaS, system mass decreases giving both increasing acoustic phonon velocities and decreasing scattering of these heat-carrying modes with optic phonons, ultimately giving [Formula: see text]. This behavior is demonstrated by correlating the scattering phase space limited by fundamental conservation conditions with mode scattering rates and phonon dispersions for each material...
October 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29039014/protocol-for-coexpression-network-construction-and-stress-responsive-expression-analysis-in-brachypodium
#12
Sanchari Sircar, Nita Parekh, Gaurav Sablok
Identifying functionally coexpressed genes and modules has increasingly become important to understand the transcriptional flux and to understand large scale gene association. Application of the graph theory and combination of tools has allowed to understand the genic interaction and to understand the role of hub and non-hub proteins in plant development and its ability to cope with stress. Association genetics has also been coupled with network modules to map these key genes as e-QTLs. High throughput sequencing approaches has revolutionized the mining of the gene behavior and also the association of the genes over time-series...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29038718/effects-of-a-theory-driven-educational-package-and-social-support-on-durability-of-cigarette-smoking-cessation-behavior-a-community-based-program
#13
Mohammad Ali Orouji, Davoud Shojaeizadeh, Roya Sadeghi, Mohammad Rafiei
BACKGROUND: According to a World Health Organization (WHO) report, the prevalence of smoking in Iranian individuals aged 15-64 is up to 12%. OBJECTIVE: The aim of the current study was to determine the durability of smoking cessation behavior based on a trans-theoretical model. METHODS: This educational experimental study was conducted on smokers in Khomein City, Iran, in 2015. Sampling was done through a public announcement and then a random allocation of participants into two study group (50 persons) and control group (60 persons)...
September 2017: Electronic Physician
https://www.readbyqxmd.com/read/29038717/acceptability-of-picture-archiving-and-communication-system-pacs-among-hospital-healthcare-personnel-based-on-a-unified-theory-of-acceptance-and-use-of-technology
#14
Maryam Ahmadi, Nahid Mehrabi, Abbas Sheikhtaheri, Mojtaba Sadeghi
BACKGROUND AND AIM: The picture archiving and communication system (PACS) is a healthcare system technology which manages medical images and integrates equipment through a network. There are some theories about the use and acceptance of technology by people to describe the behavior and attitudes of end users towards information technologies. We investigated the influential factors on users' acceptance of PACS in the military hospitals of Tehran. METHODS: In this applied analytical and cross-sectional study, 151 healthcare employees of military hospitals who had experience in using the PACS system were investigated...
September 2017: Electronic Physician
https://www.readbyqxmd.com/read/29038609/lies-damned-lies-and-survey-self-reports-identity-as-a-cause-of-measurement-bias
#15
Philip S Brenner, John DeLamater
Explanations of error in survey self-reports have focused on social desirability: that respondents answer questions about normative behavior to appear prosocial to interviewers. However, this paradigm fails to explain why bias occurs even in self-administered modes like mail and web surveys. We offer an alternative explanation rooted in identity theory that focuses on measurement directiveness as a cause of bias. After completing questions about physical exercise on a web survey, respondents completed a text message-based reporting procedure, sending updates on their major activities for five days...
December 2016: Social Psychology Quarterly
https://www.readbyqxmd.com/read/29038607/advanced-analytic-automated-aaa-measurement-of-engagement-during-learning
#16
Sidney D'Mello, Ed Dieterle, Angela Duckworth
It is generally acknowledged that engagement plays a critical role in learning. Unfortunately, the study of engagement has been stymied by a lack of valid and efficient measures. We introduce the advanced, analytic, and automated (AAA) approach to measure engagement at fine-grained temporal resolutions. The AAA measurement approach is grounded in embodied theories of cognition and affect, which advocate a close coupling between thought and action. It uses machine-learned computational models to automatically infer mental states associated with engagement (e...
2017: Educational Psychologist
https://www.readbyqxmd.com/read/29037663/unilateral-forelimb-sensorimotor-cortex-devascularization-disrupts-the-topographic-and-kinematic-characteristics-of-hand-movements-while-string-pulling-for-food-in-the-rat
#17
Ashley A Blackwell, William L Widick, Joseph L Cheatwood, Ian Q Whishaw, Douglas G Wallace
String-pulling by the rat is a bimanual act, in which an upright animal retrieves a piece of food attached to the end of the string by downward hand-over-hand movements. The present study compared the movements of string-pulling, using topographic and kinematic measures of hand movement, in control rats and rats with unilateral sensorimotor motor cortex lesion produced by removal of the pia matter. In the first week following devascularization, the rhythmicity and accuracy of string-pulling movements decomposed; however, thereafter the rhythm of bilateral alternation was restored...
October 13, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29037148/effectiveness-of-a-precede-based-education-intervention-on-quality-of-life-in-elderly-patients-with-chronic-heart-failure
#18
Qiong Wang, Lini Dong, Zaijin Jian, Xianghua Tang
BACKGROUND: One of the most important challenges in public health is to improve the quality of life in patients with chronic heart failure (CHF). Depression, self-care capacity, and quality of life interact each other in these patients. It's difficult to treat with general education programs and conventional therapy. PRECEDE model is a comprehensive and exclusive theory-based education programs. Its effectiveness for reducing depression and increasing quality of life has been demonstrated in patients with coronary artery bypass grafting, type 2 diabetes, and the elderly...
October 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29036439/do-brief-alcohol-interventions-among-unemployed-at-risk-drinkers-increase-re-employment-after-15-month
#19
Katja Haberecht, Sophie Baumann, Gallus Bischof, Beate Gaertner, Ulrich John, Jennis Freyer-Adam
Background: At-risk alcohol use is associated bi-directionally to unemployment, and decreases chances of re-employment. Brief alcohol interventions (BAI) can reduce at-risk alcohol use. This study aimed to investigate 15-month effects of BAI on unemployment among persons with at-risk alcohol use. Methods: As part of the randomized controlled 'Trial on proactive alcohol interventions among job-seekers, TOPAS', 1243 18- to 64-year-old job-seekers with at-risk alcohol use were systematically recruited at three job agencies in Germany (2008/09), and randomized to (i) a stage tailored intervention based on the trans-theoretical model of intentional behavior change (ST), (ii) a non-stage tailored intervention based on the theory of planned behavior (NST) and (iii) assessment only (AO)...
October 5, 2017: European Journal of Public Health
https://www.readbyqxmd.com/read/29036163/propagation-of-uncertainties-and-applications-in-numerical-modeling-tutorial
#20
Dominique Barchiesi, Thomas Grosges
Some inputs of computational models are commonly retrieved from external sources (handbooks, articles, dedicated measurements), and therefore are subject to uncertainties. The known experimental dispersion of the inputs can be propagated through the numerical models to produce samples of outputs. The stemming propagation of uncertainties is already significant in metrology but also has applications in optimization and inverse problem resolution of the modeled physical system. Moreover, the information on uncertainties can be used to characterize and compare models, and to deduce behavior laws...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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