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https://www.readbyqxmd.com/read/28224970/an-improved-p300-pattern-in-bci-to-catch-user-s-attention
#1
Jing Jin, Hanhan Zhang, Daly Ian, Xingyu Wang, Andrzej Cichocki
OBJECTIVE: Brain-computer interfaces (BCIs) can help patients who have lost control over most muscles but are still conscious and able to communicate or interact with the environment. One of the most popular types of BCI is the P300-based BCI. With this BCI, users are asked to count the number of appearances of target stimuli in an experiment. To date, the majority of visual P300-based BCI systems developed have used the same character or picture as the target for every stimulus presentation, which can bore users...
February 22, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28223209/langmuir-schaefer-film-deposition-onto-honeycomb-porous-films-for-retinal-tissue-engineering
#2
Maria Teresa Calejo, Tanja Ilmarinen, Elina Vuorimaa-Laukkanen, Elina Talvitie, Hanna M Hakola, Heli Skottman, Minna Kellomäki
: Age-related macular degeneration (AMD) is the leading cause of vision loss in senior citizens in the developed world. The disease is characterised by the degeneration of a specific cell layer at the back of the eye - the retinal pigment epithelium (RPE), which is essential in retinal function. The most promising therapeutic option to restore the lost vision is considered to be RPE cell transplantation. This work focuses on the development of biodegradable biomaterials with similar properties to the native Bruch's membrane as carriers for RPE cells...
February 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28221757/cooperative-electron-phonon-coupling-and-buckled-structure-in-germanene-on-au-111
#3
Jincheng Zhuang, Nan Gao, Zhi Li, Xun Xu, Jiaou Wang, Jijun Zhao, Shi Xue Dou, Yi Du
Germanene, single-atom-thick germanium nanosheet in a honeycomb lattice, was proposed to be a Dirac-fermion material beyond graphene. We performed scanning tunneling microscopy and in-situ Raman spectroscopy studies combined with first-principles calculations on the atomic structures, and the electronic and phonon properties of germanene on Au(111). The low-buckled 1×1 germanene honeycomb lattice was determined to exist in an unexpected rectangular √7×√7 superstructure. Through in-situ Raman measurements, distinctive vibrational phonon modes were discovered in √7×√7 germanene, revealing the special coupling between Dirac fermion and lattice vibrations, namely, electron-phonon coupling (EPC)...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28221386/searching-for-large-gap-quantum-spin-hall-insulators-boron-nitride-pb-sn-%C3%AE-al2o3-sandwich-structures
#4
Hui Wang, D Lu, J Kim, Z Wang, S T Pi, R Q Wu
Topological insulators hold great potential for efficient information processing and storage. Using density functional theory calculations, we predict that a honeycomb lead monolayer can be stabilized on an Al2O3 (0001) substrate to become topologically non-trivial with a sizeable band gap (∼0.27 eV). Furthermore, we propose to use a hexagonal boron-nitride (h-BN) monolayer as a protection for the topological states of Pb/Al2O3 and Sn/Al2O3. Our findings suggest new possibilities for designing and protecting two-dimensional TIs for practical applications...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28219078/mechanical-metamaterials-at-the-theoretical-limit-of-isotropic-elastic-stiffness
#5
J B Berger, H N G Wadley, R M McMeeking
A wide variety of high-performance applications require materials for which shape control is maintained under substantial stress, and that have minimal density. Bio-inspired hexagonal and square honeycomb structures and lattice materials based on repeating unit cells composed of webs or trusses, when made from materials of high elastic stiffness and low density, represent some of the lightest, stiffest and strongest materials available today. Recent advances in 3D printing and automated assembly have enabled such complicated material geometries to be fabricated at low (and declining) cost...
February 20, 2017: Nature
https://www.readbyqxmd.com/read/28218297/new-type-of-quantum-spin-hall-insulators-in-hydrogenated-pbsn-thin-films
#6
Liang Liu, Hongwei Qin, Jifan Hu
The realization of a quantum spin Hall (QSH) insulator working at high temperature is of both scientific and technical interest since it supports spin-polarized and dssipationless edge states. Based on first-principle calculations, we predicted that the two-dimensional (2D) binary compound of lead and tin (PbSn) in a buckled honeycomb framework can be tuned into a topological insulator with huge a band gap and structural stability via hydrogenation or growth on special substrates. This heavy-element-based structure is sufficiently ductile to survive the 18 ps molecular dynamics (MD) annealing to 400 K, and the band gap opened by strong spin-orbital-coupling (SOC) is as large as 0...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216508/-idiopathic-mesenteric-phlebosclerosis-one-case-report-and-literature-review
#7
Yonghong Jiang, Shan Huang, Kequan Chen, Xueqing Chen
Idiopathic mesenteric phlebosclerosis (IMP) is a rare disease and it is easy to be misdiagnosed, which is characterized by intestinal obstruction symptoms, such as abdominal pain, bloating and vomiting. In this study, a case of IMP was observed and the literatures were reviewed. Computed tomography shows funicular high-density shadow and vascular calcification shadow along the vessels around the bowels. Narrow band imaging (M-NBI) endoscopy revealed the disappeared honeycomb capillary, the disordered microvascular structure and the increased density of blood vessels...
January 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28211276/tuning-the-pseudospin-polarization-of-graphene-by-a-pseudo-magnetic-field
#8
Alexander Georgi, Peter Nemes-Incze, Ramon Carrillo-Bastos, Daiara Faria, Silvia Viola Kusminskiy, Dawei Zhai, Martin Schneider, Dinesh Subramaniam, Torge Mashoff, Nils Michael Freitag, Marcus Liebmann, Marco Pratzer, Ludger Wirtz, Colin R Woods, Roman Vladislavovich Gorbachev, Yang Cao, Kostya S Novoselov, Nancy Sandler, Markus Morgenstern
One of the intriguing characteristics of honeycomb lattices is the appearance of a pseudo-magnetic field as a result of mechanical deformation. In the case of graphene, the Landau quantization resulting from this pseudo-magnetic field has been measured using scanning tunneling microscopy. Here we show that a signature of the pseudo-magnetic field is a local sublattice symmetry breaking observable as a redistribution of the local density of states. This can be interpreted as a polarization of graphene's pseudospin due to a strain induced pseudo-magnetic field, in analogy to the alignment of a real spin in a magnetic field...
February 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28210058/comparing-the-interface-pressure-redistribution-after-applying-three-different-types-of-cushions-differences-according-to-cushion-type
#9
Ji-Su Park, Sang-Heon Lee
[Purpose] The purpose of this study was to compare the interface pressure redistribution when sitting after applying three different types of cushions and on a firm surface in individuals in their 20s and those older than 60 years old. [Subjects and Methods] Healthy 100 elderly (60 years and older) subjects and 111 college students participated in this study. Interface pressure redistribution while sitting on a firm surface or honeycomb, air, and memory foam cushions, examined in that order. [Results] For all groups, significant differences were found in the total pressure mean among sitting states...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28210039/comparing-the-interface-pressure-redistribution-of-three-different-types-of-cushions-differences-according-to-age-groups-and-cushion-preferences
#10
Ji-Su Park, Sang-Heon Lee
[Purpose] The purpose of this study was to analyze the change in interface pressure redistribution of three different types of cushions sat on by individuals in their 20s and older than 60 years old. [Subjects and Methods] One hundred and eleven college students and 100 persons than 60 years old were recruited. Sitting pressure redistribution was measured while subjects sat without cushions or on honeycomb, air, and memory foam cushions in that order. Subsequently, the cushion preference was measured. After obtaining all measurements, the mean total pressure and each quadrant's mean and peak pressure were analyzed...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28207420/temperature-dependent-collective-effects-for-silicene-and-germanene
#11
Andrii Iurov, Godfrey Gumbs, Danhong Huang
We have numerically calculated electron exchange and correlation energies and dynamical polarization functions for recently discovered silicene, germanene and other buckled honeycomb lattices at various temperatures. We have compared the dependence of these energies on the chemical potential, field-induced gap and temperature and we have concluded that in many cases they behave qualitatively in a similar way, i.e. increasing with the doping, decreasing significantly at elevated temperatures, and displaying different dependences on the asymmetry gap at various temperatures...
February 16, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28205637/optimization-of-buckypaper-enhanced-multifunctional-thermoplastic-composites
#12
Zhongrui Li, Zhiyong Liang
A series of flattened-nanotube reinforced thermoplastic composites are sizably fabricated as a function of buckypaper loading. The effects of the volume fraction, nanotube alignment and length on the tensile performance of the composites are factored into a general expression. The incorporation of self-reinforcing polyphenylene resin (Parmax) into a highly aligned buckypaper frame at an optimal weight ratio boosts the tensile strength and Young's modulus of the buckypaper/Parmax composite to 1145 MPa and 150 GPa, respectively, far exceeding those of Parmax and aligned buckypaper individually...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197876/enhancing-pancreatic-mass-with-normal-serum-ca19-9-key-mdct-features-to-characterize-pancreatic-neuroendocrine-tumours-from-its-mimics
#13
Liang Zhu, Hua-Dan Xue, Wei Liu, Xuan Wang, Xin Sui, Qin Wang, Daming Zhang, Ping Li, Zheng-Yu Jin
OBJECTIVES: To determine key MDCT features for characterizing pancreatic neuroendocrine tumours (PNET) from their mimics, which manifest as enhancing pancreatic mass with normal serum CA19-9 level. METHODS: This retrospective study had institutional review board approval and informed consent was waived. Preoperative multiphase MDCT of 74 patients with enhancing pancreatic masses and normal serum CA19-9 levels were included. Surgical pathologies were PNET (n = 42), microcystic serous cystadenomas (m-SCN, n = 12) and solid pseudopapillary epithelial neoplasms (SPEN, n = 20)...
February 15, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28195507/predicting-risk-factors-for-radiation-pneumonitis-after-stereotactic-body-radiation-therapy-for-primary-or-metastatic-lung-tumors
#14
Mitsuru Okubo, Tomohiro Itonaga, Tatsuhiko Saito, Sachika Shiraishi, Ryuji Mikami, Hidetugu Nakayama, Akira Sakurada, Shinji Sugahara, Kiyoshi Koizumi, Koichi Tokuuye
OBJECTIVES: To investigate risk factors for radiation-induced pneumonitis (RP) after hypofractionated stereotactic body radiotherapy (SBRT) in patients with lung tumors. METHODS: From May 2004 to January 2016, 66 patients with 71 primary or metastatic lung tumors were treated with SBRT; these 71 cases were retrospectively analyzed for RP. To explore the risk factors for RP, the following factors were investigated: age, sex, performance status, operability, number of treatments, respiratory gating, pulmonary emphysema, tumor location, and subclinical interstitial lung disease (ILD)...
February 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28191607/retrospective-study-of-the-clinical-characteristics-and-risk-factors-of-rheumatoid-arthritis-associated-interstitial-lung-disease
#15
Yongfeng Zhang, Hongbin Li, Nawei Wu, Xin Dong, Yi Zheng
This study aims to explore the clinical characteristics and risk factors of rheumatoid arthritis (RA)-associated interstitial lung disease (ILD). This is a retrospective study of 550 patients with RA. All patients underwent chest high-resolution computed tomography (HRCT) scanning. (1) Two hundred thirty-seven out of five hundred fifty (43.1%) patients with RA were diagnose with ILD. 13.5% ILD occurred before RA onset, 69.6% ILD occurred within 10 years of RA onset, and 16.9% ILD occurred more than 10 years after RA onset...
February 12, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28188920/optical-coherence-tomography-in-the-diagnosis-of-actinic-keratosis-a-systematic-review
#16
REVIEW
K B E Friis, L Themstrup, G B E Jemec
BACKGROUND: Optical coherence tomography (OCT) is a real-time non-invasive imaging tool, introduced in dermatology in the late 1990s. OCT uses near-infrared light impulses to produce images which can be displayed in cross-sectional and en-face mode. The technique has been used to image skin diseases especially non-melanoma skin cancer including actinic keratosis (AK). Morphological characteristics of AK can be visualized in OCT images and can be used for diagnosis as well as disease monitoring...
February 7, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28186785/edge-modes-degeneracies-and-topological-numbers-in-non-hermitian-systems
#17
Daniel Leykam, Konstantin Y Bliokh, Chunli Huang, Y D Chong, Franco Nori
We analyze chiral topological edge modes in a non-Hermitian variant of the 2D Dirac equation. Such modes appear at interfaces between media with different "masses" and/or signs of the "non-Hermitian charge." The existence of these edge modes is intimately related to exceptional points of the bulk Hamiltonians, i.e., degeneracies in the bulk spectra of the media. We find that the topological edge modes can be divided into three families ("Hermitian-like," "non-Hermitian," and "mixed"); these are characterized by two winding numbers, describing two distinct kinds of half-integer charges carried by the exceptional points...
January 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28186183/carbon-coated-honeycomb-ni-mn-co-o-inverse-opal-a-high-capacity-ternary-transition-metal-oxide-anode-for-li-ion-batteries
#18
David McNulty, Hugh Geaney, Colm O'Dwyer
We present the formation of a carbon-coated honeycomb ternary Ni-Mn-Co-O inverse opal as a conversion mode anode material for Li-ion battery applications. In order to obtain high capacity via conversion mode reactions, a single phase crystalline honeycombed IO structure of Ni-Mn-Co-O material was first formed. This Ni-Mn-Co-O IO converts via reversible redox reactions and Li2O formation to a 3D structured matrix assembly of nanoparticles of three (MnO, CoO and NiO) oxides, that facilitates efficient reactions with Li...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28183613/pdlla-honeycomb-like-scaffolds-with-a-high-loading-of-superhydrophilic-graphene-multi-walled-carbon-nanotubes-promote-osteoblast-in-vitro-functions-and-guided-in-vivo-bone-regeneration
#19
Edmundo Silva, Luana Marotta Reis de Vasconcellos, Bruno V M Rodrigues, Danilo Martins Dos Santos, Sergio P Campana-Filho, Fernanda Roberta Marciano, Thomas J Webster, Anderson Oliveira Lobo
Herein, we developed honeycomb-like scaffolds by combining poly (d, l-lactic acid) (PDLLA) with a high amount of graphene/multi-walled carbon nanotube oxides (MWCNTO-GO, 50% w/w). From pristine multi-walled carbon nanotubes (MWCNT) powders, we produced MWCNTO-GO via oxygen plasma etching (OPE), which promoted their exfoliation and oxidation. Initially, we evaluated PDLLA and PDLLA/MWCNTO-GO scaffolds for tensile strength tests, cell adhesion and cell viability (with osteoblast-like MG-63 cells), alkaline phosphatase (ALP, a marker of osteoblast differentiation) activity and mineralized nodule formation...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28183588/a-cytocompatible-micro-nano-textured-surface-with-si-doped-titania-mesoporous-arrays-fabricated-by-a-one-step-anodization
#20
Huibing Liu, Xiaobo Huang, Hanwu Yu, Xiaoning Yang, Xiangyu Zhang, Ruiqiang Hang, Bin Tang
To mimic the hierarchical structure of bone tissues, a hybrid micro/nano-textured titanium surface with Si-doped TiO2 mesoporous arrays is fabricated by a one-step high current anodization (HCA). Specifically, the HCA is carried out in a electrolyte containing NO3(-) and SiO3(2-). The NO3(-) in the electrolyte is demonstrated to play a key role in mediating the formation of honeycombed TiO2 mesoporous arrays, which are different than the nanotubes formed by the mediating of F(-) ion in the conventional anodization...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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