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https://www.readbyqxmd.com/read/28806543/200%C3%A2-kev-cold-field-emission-source-using-carbon-cone-nanotip-application-to-scanning-transmission-electron-microscopy
#1
Shuichi Mamishin, Yudai Kubo, Robin Cours, Marc Monthioux, Florent Houdellier
We report the use of a pyrolytic carbon cone nanotip as field emission cathode inside a modern 200 kV dedicated scanning transmission electron microscope. We show an unprecedented improvement in the probe current stability while maintaining all the fundamental properties of a cold field emission source such as a small angular current density together with a high brightness. We have also studied the influence of the low extraction voltage, as enabled by the nanosized apex of the cones, on the electron optics properties of the source that prevent the formation of a virtual beam cross-over of the gun...
August 9, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28806220/association-of-gender-with-outcome-and-host-response-in-critically-ill-sepsis-patients
#2
Lonneke A van Vught, Brendon P Scicluna, Maryse A Wiewel, Arie J Hoogendijk, Peter M C Klein Klouwenberg, David S Y Ong, Olaf L Cremer, Janneke Horn, Marek Franitza, Mohammad R Toliat, Peter Nürnberg, Marc M J Bonten, Marcus J Schultz, Tom van der Poll
OBJECTIVE: To determine the association of gender with the presentation, outcome, and host response in critically ill patients with sepsis. DESIGN AND SETTING: A prospective observational cohort study in the ICU of two tertiary hospitals between January 2011 and January 2014. PATIENTS: All consecutive critically ill patients admitted with sepsis, involving 1,815 admissions (1,533 patients). INTERVENTIONS: The host response was evaluated on ICU admission by measuring 19 plasma biomarkers reflecting organ systems implicated in sepsis pathogenesis (1,205 admissions) and by applying genome-wide blood gene expression profiling (582 admissions)...
August 11, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28806125/changing-avatars-changing-selves-the-influence-of-social-and-contextual-expectations-on-digital-rendition-of-identity
#3
Stefano Triberti, Ilaria Durosini, Filippo Aschieri, Daniela Villani, Giuseppe Riva
Avatar creation is an interesting topic for both video game and social network studies. Research has shown that the creation of avatars is influenced by individual, contextual, and cultural features. Avatars are used to represent aspects of users' personality, but multiple avatars are used in different virtual contexts, as self-presentation strategies may vary according to the different "audiences" to be met online (say: friends, or strangers). Moreover, avatar creation is also influenced by cultural variables, such as gender, as avatars embody stereotypical aspects of being a woman or a man...
August 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28806119/how-augmented-reality-is-poised-to-outpace-virtual-reality
#4
Brenda K Wiederhold
No abstract text is available yet for this article.
August 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28806082/the-discovery-of-novel-antimalarial-aminoxadiazoles-as-a-promising-nonendoperoxide-scaffold
#5
Elena Sandoval, María José Lafuente-Monasterio, María J Almela, Pablo Castañeda, María Belén Jiménez Díaz, María S Martínez-Martínez, Jaume Vidal, Íñigo Angulo-Barturen, Paul Bamborough, Jeremy Burrows, Nicholas Cammack, María J Chaparro, José M Coterón, Cristina de Cozar, Benigno Crespo, Beatriz Díaz, Gerard Drewes, Esther Fernández, Santiago Ferrer-Bazaga, María Teresa Fraile, Francisco J Gamo, Sonja Ghidelli-Disse, Rubén Gómez, John Haselden, Sophie Huss, María Luisa León, Jaime de Mercado, Simon J F Macdonald, José Ignacio Martín Hernando, Sara Prats, Margarita Puente, Anne Rodríguez, Juan C de la Rosa, Lourdes Rueda, Carolyn Selenski, Paul Willis, David M Wilson, Michael Witty, Félix Calderón
Since the appearance of resistance to the current front-line antimalarial treatments, ACTs (artemisinin combination therapies), the discovery of novel chemical entities to treat the disease is recognized as a major global health priority. From the GSK antimalarial set, we identified an aminoxadiazole with an antiparasitic profile comparable with artemisinin (1), with no cross-resistance in a resistant strains panel and a potential new mode of action. A medicinal chemistry program allowed delivery of compounds such as 19 with high solubility in aqueous media, an acceptable toxicological profile, and oral efficacy...
August 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28806078/a-time-dependent-coupled-perturbed-hartree-fock-and-density-functional-theory-approach-for-calculating-frequency-dependent-hyper-polarizabilities-with-non-orthogonal-localized-molecular-orbitals
#6
Daoling Peng, Shaopeng Li, Liang Peng, Feng Long Gu, Weitao Yang
Time-dependent coupled perturbed Hartree-Fock/Density-Functional-Theory (TDHF/TDDFT) approach has been reformulated based on non-orthogonal localized molecular orbitals (NOLMOs). Based on the NOLMO Fock equation, we have derived the corresponding NOLMO-TDHF/TDDFT equations up to the third order, and the formula for the frequency dependent (hyper)polarizabilities have been given. Our approach has been applied to calculate both static and dynamic (hyper)polarizabilities of molecules varying from small molecules to large molecules...
August 14, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28805447/performance-on-naturalistic-virtual-reality-tasks-depends-on-global-cognitive-functioning-as-assessed-via-traditional-neurocognitive-tests
#7
Jorge Oliveira, Pedro Gamito, Daniyal M Alghazzawi, Habib M Fardoun, Pedro J Rosa, Tatiana Sousa, Luís Felipe Picareli, Diogo Morais, Paulo Lopes
This investigation sought to understand whether performance in naturalistic virtual reality tasks for cognitive assessment relates to the cognitive domains that are supposed to be measured. The Shoe Closet Test (SCT) was developed based on a simple visual search task involving attention skills, in which participants have to match each pair of shoes with the colors of the compartments in a virtual shoe closet. The interaction within the virtual environment was made using the Microsoft Kinect. The measures consisted of concurrent paper-and-pencil neurocognitive tests for global cognitive functioning, executive functions, attention, psychomotor ability, and the outcomes of the SCT...
August 14, 2017: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/28805385/synthesis-of-a-series-of-heavy-lanthanide-iii-monoporphyrinato-complexes-with-tetragonal-symmetry
#8
Anas Santria, Akira Fuyuhiro, Takamitsu Fukuda, Naoto Ishikawa
A series of heavy lanthanide(III) and yttrium(III) monoporphyrinato complexes formulated in [Ln(TPP)(cyclen)]Cl (Ln = Tb, Dy, Ho, Er, Tm, Yb, and Y; TPP = 5,10,15,20-tetraphenylporphyrinato), with cyclen, 1,4,7,10-tetraazacyclododecane, as a capping ligand, have been prepared in mild conditions and studied using single-crystal X-ray diffraction crystallography. The complexes exhibit an electronic absorption band (B(0,0)) in the range of 421-423 nm, showing a bathochromic shift associated with the increase of the ionic radii of the lanthanide, as well as two peaks of Q(1,0) and Q(0,0) bands between 548-586 nm...
August 14, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28805221/a-simplified-ab-initio-treatment-of-diradicaloid-structures-produced-from-stretching-and-breaking-chemical-bonds
#9
Suvonil Sinha Ray, Anirban Ghosh, Anindita Shit, Rajat K Chaudhuri, Sudip Chattopadhyay
The present investigation reports on the prospect of using state specific multireference perturbation theory (SSMRPT) with an improved virtual orbital complete active space configuration interaction (IVO-CASCI) reference function (IVO-SSMRPT) to generate potential energy surfaces (PESs) for molecular systems [such as CH4, C2H6, C2H4, H2O2, LiH, and KN] by stretching and breaking of suitable bonds with modest basis sets. We have also revisited the dissociation energy profile of triplet ketene which exhibits a step-like structure in the observed rate...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28805190/driving-force-of-the-orbital-relevant-electronic-nematicity-in-fe-based-superconductors
#10
Tao Li, Yuehua Su
The electronic nematic responses in Fe-based superconductors have been observed ubiquitously in various experimental probes. One novel nematic character is the d-wave {\it bond} orbital-relevant nematic charge order which was firstly proposed by symmetry analysis and then conformed by angle-resolved photoemission spectroscopy. In this paper, we present a mechanism that the driving force of the orbital-relevant nematic charge order is the reduction of the large Hubbard energy in the particle-hole charge channel by virtual hopping processes...
August 14, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28805044/nm%C3%AF-improved-re-implementation-of-nm-a-software-for-estimating-gene-dispersal-and-mating-patterns
#11
Igor J Chybicki
This paper introduces the NMπ computer program designed for estimation of plant mating system and seed and pollen dispersal kernels. NMπ is a re-implementation of the NM+ program and provides new features such as support for multi-core processors, explicit treatment of dioecy, the possibility of incorporating uniparentally cytoplasmic markers, the possibility of assessing assortative mating due to phenotypic similarity and inference about offspring genealogies. The probability model of parentage (the neighborhood model) accounts for missing data and genotyping errors, which can be estimated along with regular parameters of the mating system...
August 14, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28804985/a-randomised-controlled-comparison-of-second-level-treatment-approaches-for-treatment-resistant-adults-with-bulimia-nervosa-and-binge-eating-disorder-assessing-the-benefits-of-virtual-reality-cue-exposure-therapy
#12
Marta Ferrer-García, José Gutiérrez-Maldonado, Joana Pla-Sanjuanelo, Ferran Vilalta-Abella, Giuseppe Riva, Massimo Clerici, Joan Ribas-Sabaté, Alexis Andreu-Gracia, Fernando Fernandez-Aranda, Laura Forcano, Nadine Riesco, Isabel Sánchez, Neli Escandón-Nagel, Osane Gomez-Tricio, Virginia Tena, Antonios Dakanalis
A question that arises from the literature on therapy is whether second-level treatment is effective for patients with recurrent binge eating who fail first-level treatment. It has been shown that subjects who do not stop binge eating after an initial structured cognitive-behavioural treatment (CBT) programme benefit from additional CBT (A-CBT) sessions; however, it has been suggested that these resistant patients would benefit even more from cue exposure therapy (CET) targeting features associated with poor response (e...
August 14, 2017: European Eating Disorders Review: the Journal of the Eating Disorders Association
https://www.readbyqxmd.com/read/28804730/breast-dose-reduction-with-organ-based-wide-angle-tube-current-modulated-ct
#13
Wanyi Fu, Gregory M Sturgeon, Greeshma Agasthya, William Paul Segars, Anuj J Kapadia, Ehsan Samei
This study aimed to estimate the organ dose reduction potential for organ-dose-based tube current modulated (ODM) thoracic computed tomography (CT) with a wide dose reduction arc. Twenty-one computational anthropomorphic phantoms (XCAT) were used to create a virtual patient population with clinical anatomic variations. The phantoms were created based on patient images with normal anatomy (age range: 27 to 66 years, weight range: 52.0 to 105.8 kg). For each phantom, two breast tissue compositions were simulated: [Formula: see text] and [Formula: see text] (glandular-to-adipose ratio)...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28804712/virtual-and-actual-humanoid-robot-control-with-four-class-motor-imagery-based-optical-brain-computer-interface
#14
Alyssa M Batula, Youngmoo E Kim, Hasan Ayaz
Motor-imagery tasks are a popular input method for controlling brain-computer interfaces (BCIs), partially due to their similarities to naturally produced motor signals. The use of functional near-infrared spectroscopy (fNIRS) in BCIs is still emerging and has shown potential as a supplement or replacement for electroencephalography. However, studies often use only two or three motor-imagery tasks, limiting the number of available commands. In this work, we present the results of the first four-class motor-imagery-based online fNIRS-BCI for robot control...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28804677/haloselective-cross-coupling-via-ni-photoredox-dual-catalysis
#15
Kingson Lin, Rebecca J Wiles, Christopher B Kelly, Geraint H M Davies, Gary A Molander
The chemoselective functionalization of polyfunctional aryl linchpins is crucial for rapid diversification. Although well-explored for Csp(2) and Csp nucleophiles, the chemoselective introduction of Csp(3) groups remains notoriously difficult and is virtually undocumented using Ni catalysts. To fill this methodological gap, a "haloselective" cross-coupling process of arenes bearing two halogens, I and Br, using ammonium alkylbis(catecholato)silicates, has been developed. Utilizing Ni/photoredox dual catalysis, Csp(3) -Csp(2) bonds can be forged selectively at the iodine-bearing carbon of bromo(iodo)arenes...
August 4, 2017: ACS Catalysis
https://www.readbyqxmd.com/read/28803457/development-of-a-proficiency-based-virtual-reality-simulation-training-curriculum-for-laparoscopic-appendicectomy
#16
Pramudith Sirimanna, Marc A Gladman
BACKGROUND: Proficiency-based virtual reality (VR) training curricula improve intraoperative performance, but have not been developed for laparoscopic appendicectomy (LA). This study aimed to develop an evidence-based training curriculum for LA. METHODS: A total of 10 experienced (>50 LAs), eight intermediate (10-30 LAs) and 20 inexperienced (<10 LAs) operators performed guided and unguided LA tasks on a high-fidelity VR simulator using internationally relevant techniques...
August 13, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28803243/lithium-sensitivity-of-store-operated-ca2-entry-and-survival-of-fibroblasts-isolated-from-chorea-acanthocytosis-patients
#17
Lisann Pelzl, Bhaeldin Elsir, Itishri Sahu, Rosi Bissinger, Yogesh Singh, Basma Sukkar, Sabina Honisch, Ludger Schoels, Mohamed Jemaà, Elisabeth Lang, Alexander Storch, Andreas Hermann, Christos Stournaras, Florian Lang
BACKGROUND: The widely expressed protein chorein fosters activation of the phosphoinositide 3 kinase (PI3K) pathway thus supporting cell survival. Loss of function mutations of the chorein encoding gene VPS13A (vacuolar protein sorting-associated protein 13A) causes chorea-acanthocytosis (ChAc), a neurodegenerative disorder paralleled by deformations of erythrocytes. In mice, genetic knockout of chorein leads to enhanced neuronal apoptosis. PI3K dependent signalling upregulates Orai1, a pore forming channel protein accomplishing store operated Ca2+ entry (SOCE)...
August 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28802770/efficacy-of-navigation-may-be-influenced-by-retrosplenial-cortex-mediated-learning-of-landmark-stability
#18
Stephen D Auger, Peter Zeidman, Eleanor A Maguire
Human beings differ considerably in their ability to orient and navigate within the environment, but it has been difficult to determine specific causes of these individual differences. Permanent, stable landmarks are thought to be crucial for building a mental representation of an environment. Poor, compared to good, navigators have been shown to have difficulty identifying permanent landmarks, with a concomitant reduction in functional MRI (fMRI) activity in the retrosplenial cortex. However, a clear association between navigation ability and the learning of permanent landmarks has not been established...
August 9, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28802482/recent-advances-on-cdk-inhibitors-an-insight-by-means-of-in-silico-methods
#19
REVIEW
Marco Tutone, Anna Maria Almerico
The cyclin dependent kinases (CDKs) are a small family of serine/threonine protein kinases that can act as a potential therapeutic target in several proliferative diseases, including cancer. This short review is a survey on the more recent research progresses in the field achieved by using in silico methods. All the "armamentarium" available to the medicinal chemists (docking protocols and molecular dynamics, fragment-based, de novo design, virtual screening, and QSAR) has been employed to the discovery of new, potent, and selective inhibitors of cyclin dependent kinases...
August 4, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28802443/controlling-robots-in-the-home-factors-that-affect-the-performance-of-novice-robot-operators
#20
Conor McGinn, Aran Sena, Kevin Kelly
For robots to successfully integrate into everyday life, it is important that they can be effectively controlled by laypeople. However, the task of manually controlling mobile robots can be challenging due to demanding cognitive and sensorimotor requirements. This research explores the effect that the built environment has on the manual control of domestic service robots. In this study, a virtual reality simulation of a domestic robot control scenario was developed. The performance of fifty novice users was evaluated, and their subjective experiences recorded through questionnaires...
November 2017: Applied Ergonomics
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