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Attribution theory

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https://www.readbyqxmd.com/read/28098460/sulfate-mediated-end-to-end-assembly-of-gold-nanorods
#1
Seyyed Mohammad Hossein Abtahi, Nathan D Burrows, Fred A Idesis, Catherine J Murphy, Navid B Saleh, Peter J Vikesland
There is interest in the controlled aggregation of gold nanorods (GNRs) for the production of extended nanoassemblies. Prior studies have relied upon chemical modification of the GNR surface to achieve a desired final aggregate structure. Herein, we illustrate that control of electrolyte composition can facilitate end-to-end assembly of cetyltrimethylammonium bromide (CTAB) coated GNRs. By adjusting either the sulfate anion concentration or the exposure time it is possible to connect GNRs in chain-like assemblies...
January 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28095334/predictors-and-mediators-of-trait-anger-across-the-psychosis-continuum-the-role-of-attachment-style-paranoia-and-social-cognition
#2
Hannah Darrell-Berry, Sandra Bucci, Jasper Palmier-Claus, Richard Emsley, Richard Drake, Katherine Berry
Anger in the context of psychosis has a significant impact on treatment outcomes and serious implications for risk management. Understanding mechanisms underlying anger will improve interventions and inform strategies for prevention. This study is the first to examine the relationships between anger and key theoretical drivers across different phases of the psychosis continuum. A battery including measures of theory of mind, attachment, hostile attribution bias, paranoia and anger was administered to 174 participants (14 ultra-high risk, 20 first-episode, 20 established psychosis, 120 non-clinical participants)...
January 4, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28094981/gw-100-a-plane-wave-perspective-for-small-molecules
#3
Emanuele Maggio, Peitao Liu, Michiel J van Setten, Georg Kresse
In a recent work, van Setten and coworkers have presented a carefully converged G0W0 study of 100 closed shell molecules [J. Chem. Theory Comput. 2015, 11, 5665-5687]. For two different codes they found excellent agreement to within few 10 meV if identical Gaussian basis sets were used. We inspect the same set of molecules using the projector augmented wave method and the Vienna ab initio simulation package (VASP). For the ionization potential, the basis set extrapolated plane wave results agree very well with the Gaussian basis sets, often reaching better than 50 meV agreement...
January 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28093592/synthesis-and-optical-and-electrochemical-properties-of-julolidine-structured-pyrido-3-4-b-indole-dye
#4
Toshiaki Enoki, Keishi Matsuo, Joji Ohshita, Yousuke Ooyama
The julolidine-structured pyrido[3,4-b]indole dye ET-1 has been newly designed and developed as a small D-A fluorescent dye. ET-1 showed bathochromic shifts of the fluorescence band upon changing from aprotic solvents to protic solvents, as well as positive fluorescence solvatochromism. Moreover, it was found that ET-1 can form a 1 : 1 Py(N)-B complex with boron trifluoride and a hydrogen-bonded proton transfer (Py(N)-H) complex with trifluoroacetic acid, which exhibit photoabsorption and fluorescence bands at a longer wavelength region than the pristine ET-1...
January 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28092635/evaluating-the-accuracy-of-a-three-term-pencil-beam-algorithm-in-heterogeneous-media
#5
J W Chapman, N C Knutson, J D Fontenot, W D Newhauser, K R Hogstrom
The goal of this work was to evaluate the accuracy of our in-house analytical dose calculation code against MCNPX data in heterogeneous phantoms. The analytical model utilizes a pencil beam model based on Fermi-Eyges theory to account for multiple Coulomb scattering and a least-squares fit to Monte Carlo data to account for nonelastic nuclear interactions as well as any remaining, uncharacterized scatter (the 'nuclear halo'). The model characterized dose accurately (up to 1% of maximum dose in broad fields (4  ×  4 cm(2) and 10  ×  10 cm(2)) and up to 0...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28088866/a-combined-experimental-and-computational-study-on-the-unimolecular-decomposition-of-jp-8-jet-fuel-surrogates-ii-n-dodecane-n-c12h26
#6
Long Zhao, Tao Yang, Ralf I Kaiser, Tyler Patrick Troy, Musahid Ahmed, Joao Marcelo Ribeiro, Daniel Belisario-Lara, Alexander Moiseevich Mebel
We investigated temperature-dependent products in the pyrolysis of helium-seeded n-dodecane, which represents a surrogate of the n-alkane fraction of Jet Propellant-8 (JP-8) aviation fuel. The experiments were performed in a high temperature chemical reactor over a temperature range of 1,200 K to 1,600 K at a pressure of 600 Torr, with in situ identification of the nascent products in a supersonic molecular beam using single photon vacuum ultraviolet (VUV) photoionization coupled with the analysis of the ions in a reflectron time-of-flight mass spectrometer (ReTOF)...
January 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28081570/the-population-ecology-of-technology-an-empirical-study-of-us-biotechnology-patents-from-1976-to-2003
#7
Ad van den Oord, Arjen van Witteloostuijn
A detailed understanding of technological change as an evolutionary process is currently not well understood. To increase our understanding, we build upon theory from organizational ecology to develop a model of endogenous technological growth and determine to what extent the pattern of technological growth can be attributed to the structural or systemic characteristics of the technology itself. Through an empirical investigation of patent data in the biotechnology industry from 1976 to 2003, we find that a technology's internal (i...
2017: PloS One
https://www.readbyqxmd.com/read/28079222/infrared-characterisation-of-acetonitrile-and-propionitrile-aerosols-under-titan-s-atmospheric-conditions
#8
C Ennis, R Auchettl, M Ruzi, E G Robertson
Pure, crystalline acetonitrile (CH3CN) and propionitrile (CH3CH2CN) particles were formed in a collisional cooling cell allowing for infrared (IR) signatures to be compiled from 50 to 5000 cm(-1). The cell temperature and pressure conditions were controlled to simulate Titan's lower atmosphere (80-130 K and 1-100 mbar), allowing for the comparison of laboratory data to the spectra obtained from the Cassini-Huygens mission. The far-IR features confirmed the morphology of CH3CN aerosols as the metastable β-phase (monoclinic) ice, however, a specific crystalline phase for CH3CH2CN could not be verified...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28079207/hysteresis-phenomena-in-perovskite-solar-cells-the-many-and-varied-effects-of-ionic-accumulation
#9
Daniel A Jacobs, Yiliang Wu, Heping Shen, Chog Barugkin, Fiona J Beck, Thomas P White, Klaus Weber, Kylie R Catchpole
The issue of hysteresis in perovskite solar cells has now been convincingly linked to the presence of mobile ions within the perovskite layer. Here we test the limits of the ionic theory by attempting to account for a number of exotic characterization results using a detailed numerical device model that incorporates ionic charge accumulation at the perovskite interfaces. Our experimental observations include a temporary enhancement in open-circuit voltage following prolonged periods of negative bias, dramatically S-shaped current-voltage sweeps, decreased current extraction following positive biasing or "inverted hysteresis", and non-monotonic transient behaviours in the dark and the light...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28077685/working-with-what-you-ve-got-unattractive-males-show-greater-mate-guarding-effort-in-a-duetting-songbird
#10
Jenélle Dowling, Michael S Webster
When mates are limited, individuals should allocate resources to mating tactics that maximize fitness. In species with extra-pair paternity (EPP), males can invest in mate guarding, or, alternatively, in seeking EPP. Males should optimize fitness by adjusting investment according to their attractiveness to females, such that attractive males seek EPP, and unattractive males guard mates. This theory has received little empirical testing, leaving our understanding of the evolution of mating tactics incomplete; it is unclear how a male's relative attractiveness influences his tactics...
January 2017: Biology Letters
https://www.readbyqxmd.com/read/28071898/abnormal-multiple-charge-memory-states-in-exfoliated-few-layer-wse2-transistors
#11
Mikai Chen, Yifan Wang, Nathan Shepherd, Chad Huard, Jiantao Zhou, L J Guo, Wei Lu, Xiaogan Liang
To construct reliable nanoelectronic devices based on emerging 2D layered semiconductors, we need to understand the charge-trapping processes in such devices. Additionally, the identified charge-trapping schemes in such layered materials could be further exploited to make multibit (or highly desirable analog-tunable) memory devices. Here, we present a study on the abnormal charge-trapping or memory characteristics of few-layer WSe2 transistors. This work shows that multiple charge-trapping states with large extrema spacing, long retention time, and analog tunability can be excited in the transistors made from mechanically exfoliated few-layer WSe2 flakes, whereas they cannot be generated in widely studied few-layer MoS2 transistors...
January 12, 2017: ACS Nano
https://www.readbyqxmd.com/read/28068598/novel-flavonolignan-hybrid-antioxidants-from-enzymatic-preparation-to-molecular-rationalization
#12
Eva Vavříková, Vladimír Křen, Lubica Jezova-Kalachova, Michal Biler, Benjamin Chantemargue, Michaela Pyszková, Sergio Riva, Marek Kuzma, Kateřina Valentová, Jitka Ulrichová, Jiří Vrba, Patrick Trouillas, Jan Vacek
A series of antioxidants was designed and synthesized based on conjugation of the hepatoprotective flavonolignan silybin with l-ascorbic acid, trolox alcohol or tyrosol via a C12 aliphatic linker. These hybrid molecules were prepared from 12-vinyl dodecanedioate-23-O-silybin using the enzymatic regioselective acylation procedure with Novozym 435 (lipase B) or with lipase PS. Voltammetric analyses showed that the silybin-ascorbic acid conjugate exhibited excellent electron donating ability, in comparison to the other conjugates...
December 26, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28068344/an-empirical-analysis-of-rough-set-categorical-clustering-techniques
#13
Jamal Uddin, Rozaida Ghazali, Mustafa Mat Deris
Clustering a set of objects into homogeneous groups is a fundamental operation in data mining. Recently, many attentions have been put on categorical data clustering, where data objects are made up of non-numerical attributes. For categorical data clustering the rough set based approaches such as Maximum Dependency Attribute (MDA) and Maximum Significance Attribute (MSA) has outperformed their predecessor approaches like Bi-Clustering (BC), Total Roughness (TR) and Min-Min Roughness(MMR). This paper presents the limitations and issues of MDA and MSA techniques on special type of data sets where both techniques fails to select or faces difficulty in selecting their best clustering attribute...
2017: PloS One
https://www.readbyqxmd.com/read/28065936/effects-of-oxygen-vacancies-on-the-structural-and-optical-properties-of-%C3%AE-ga2o3
#14
Linpeng Dong, Renxu Jia, Bin Xin, Bo Peng, Yuming Zhang
The structural, electronic, and optical properties of β-Ga2O3 with oxygen vacancies are studied by employing first-principles calculations based on density function theory. Based on the defects formation energies, we conclude the oxygen vacancies are most stable in their fully charge states. The electronic structures and optical properties of β-Ga2O3 are calculated by Generalized Gradient Approximation + U formalisms with the Hubbard U parameters set 7.0 eV and 8.5 eV for Ga and O ions, respectively. The calculated bandgap is 4...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065293/islands-in-a-sea-of-mud-insights-from-terrestrial-island-theory-for-community-assembly-on-insular-marine-substrata
#15
K S Meyer
Most marine hard-bottom habitats are isolated, separated from other similar habitats by sand or mud flats, and can be considered analogous to terrestrial islands. The extensive scientific literature on terrestrial islands provides a theoretical framework for the analysis of isolated marine habitats. More individuals and higher species richness occur on larger marine substrata, a pattern that resembles terrestrial islands. However, while larger terrestrial islands have greater habitat diversity and productivity, the higher species richness on larger marine hard substrata can be explained by simple surface area and hydrodynamic phenomena: larger substrata extend further into the benthic boundary, exposing fauna to faster current and higher food supply...
2017: Advances in Marine Biology
https://www.readbyqxmd.com/read/28060919/the-older-adult-positivity-effect-in-evaluations-of-trustworthiness-emotion-regulation-or-cognitive-capacity
#16
Leslie A Zebrowitz, Jasmine Boshyan, Noreen Ward, Angela Gutchess, Nouchine Hadjikhani
An older adult positivity effect, i.e., the tendency for older adults to favor positive over negative stimulus information more than do younger adults, has been previously shown in attention, memory, and evaluations. This effect has been attributed to greater emotion regulation in older adults. In the case of attention and memory, this explanation has been supported by some evidence that the older adult positivity effect is most pronounced for negative stimuli, which would motivate emotion regulation, and that it is reduced by cognitive load, which would impede emotion regulation...
2017: PloS One
https://www.readbyqxmd.com/read/28059932/a-developmental-perspective-on-social-cognition-difficulties-in-youth-at-clinical-high-risk-for-psychosis
#17
Sarah Hope Lincoln, Emily M Norkett, Katherine H Frost, Joseph Gonzalez-Heydrich, Eugene J D'Angelo
After participating in this activity, learners should be better able to:• Evaluate the evolution of social cognitive abilities as a developmental process• Assess the evidence regarding social cognition difficulties in youth at clinical high risk for psychosisIndividuals at clinical high risk (CHR) for psychosis exhibit a broad range of difficulties, including impaired social cognition, which may represent a target for early identification and intervention. Several studies have examined various domains of social cognition in CHR individuals...
January 2017: Harvard Review of Psychiatry
https://www.readbyqxmd.com/read/28058425/structure-and-photoluminescence-properties-of-a-novel-apatite-green-phosphor-ba5-po4-2sio4-eu-2-excited-by-nuv-light
#18
Xin Ding, Yuhua Wang
A novel apatite mineral of Ba5(PO4)2SiO4 was synthesized successfully using a traditional high temperature solid-state reaction. Its structure was determined by high-resolution transmission electron microscopy, fast Fourier transform, energy dispersive X-ray spectroscopy, and X-ray powder diffraction Rietveld refinement, and this was found to be a hexagonal crystal system with the space group attributed to P63/m (176). Moreover, a series of Eu(2+) doped Ba5(PO4)2SiO4 phosphors were investigated. The photoluminescence (PL) properties of Ba5(PO4)2SiO4:Eu(2+) were investigated in detail by density functional theory calculations, diffuse reflection spectra, emission-excitation spectra, decay curves, and temperature dependence spectra...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28057531/resting-state-brain-connectivity-patterns-before-eventual-relapse-into-cocaine-abuse
#19
M Berlingeri, D Losasso, A Girolo, E Cozzolino, T Masullo, M Scotto, M Sberna, G Bottini, E Paulesu
According to recent theories, drug addicted patients suffer of an impaired response inhibition and salience attribution (I-RISA) together with a perturbed connectivity between the nuclei accumbens (NAcs) and the orbito-prefrontal (oPFC) and dorsal prefrontal (dPFC) cortices, brain regions associated with motivation and cognitive control. To empirically test these assumptions, we evaluated the (neuro)psychological trait and the functional organization of the resting state brain networks associated with the NAcs in 18 former cocaine abusers (FCAs), while being in drug abstinence since 5 months...
January 2, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28057005/intragenerational-social-mobility-and-functional-somatic-symptoms-in-a-northern-swedish-context-analyses-of-diagonal-reference-models
#20
Frida Jonsson, Miguel San Sebastian, Anne Hammarström, Per E Gustafsson
BACKGROUND: Research indicate that social class mobility could be potentially important for health, but whether this is due to the movement itself or a result of people having been integrated in different class contexts is, to date, difficult to infer. In addition, although several theories suggest that transitions between classes in the social hierarchy can be stressful experiences, few studies have empirically examined whether such movements may have health effects, over and above the implications of "being" in these classes...
January 3, 2017: International Journal for Equity in Health
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