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https://www.readbyqxmd.com/read/29233748/rationale-behind-the-use-of-double-layer-poly-propylene-patch-g-patch-dural-substitute-during-decompressive-craniectomy-as-an-adhesion-preventive-material-for-subsequent-cranioplasty-with-special-reference-to-flap-elevation-time
#1
Milesh Nagar, Rosebist Pk, Raj Chandran, Sharmad Ms, Rajmohan Bp, Anil Peethambaran, Sreejith Md, Sourabh Jain, Saurabh Sharma
OBJECTIVE: Dural substitutes are used in decompressive craniectomy (DC) in order to prevent adhesions during subsequent cranioplasty. Current literature attributes them to the reduced blood loss and reduction in operative time of cranioplasty. The use of double layer substitute has rarely been documented. We decided to study the use of double layer G-patch as a dural substitute in DC and evaluate its outcome during subsequent cranioplasty with special focus on flap elevation time and blood loss during cranioplasty...
December 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29229406/validation-of-single-plane-fluoroscopy-and-2d-3d-shape-matching-for-quantifying-shoulder-complex-kinematics
#2
Rebekah L Lawrence, Arin M Ellingson, Paula M Ludewig
Fluoroscopy and 2D/3D shape-matching has emerged as the standard for non-invasively quantifying kinematics. However, its accuracy has not been well established for the shoulder complex when using single-plane fluoroscopy. The purpose of this study was to determine the accuracy of single-plane fluoroscopy and 2D/3D shape-matching for quantifying full shoulder complex kinematics. Tantalum markers were implanted into the clavicle, humerus, and scapula of four cadaveric shoulders. Biplane radiographs were obtained with the shoulder in five humerothoracic elevation positions (arm at the side, 30°, 60°, 90°, maximum)...
December 8, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29219587/critical-spin-superflow-in-a-spinor-bose-einstein-condensate
#3
Joon Hyun Kim, Sang Won Seo, Y Shin
We investigate the critical dynamics of spin superflow in an easy-plane antiferromagnetic spinor Bose-Einstein condensate. Spin-dipole oscillations are induced in a trapped condensate by applying a linear magnetic field gradient and we observe that the damping rate increases rapidly as the field gradient increases above a certain critical value. The onset of dissipation is found to be associated with the generation of dark-bright solitons due to the modulation instability of the counterflow of two spin components...
November 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29219474/zero-energy-modes-from-coalescing-andreev-states-in-a-two-dimensional-semiconductor-superconductor-hybrid-platform
#4
H J Suominen, M Kjaergaard, A R Hamilton, J Shabani, C J Palmstrøm, C M Marcus, F Nichele
We investigate zero-bias conductance peaks that arise from coalescing subgap Andreev states, consistent with emerging Majorana zero modes, in hybrid semiconductor-superconductor wires defined in a two-dimensional InAs/Al heterostructure using top-down lithography and gating. The measurements indicate a hard superconducting gap, ballistic tunneling contact, and in-plane critical fields up to 3 T. Top-down lithography allows complex geometries, branched structures, and straightforward scaling to multicomponent devices compared to structures made from assembled nanowires...
October 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29215286/theoretical-phase-diagram-for-the-room-temperature-electron-hole-liquid-in-photo-excited-quasi-2d-monolayer-mos2
#5
Avinash Rustagi, Alexander F Kemper
Strong correlations between electrons and holes can drive the existence of an electron-hole liquid (EHL) state, typically at high carrier densities and low temperatures. The recent emergence of quasi-2D monolayer transition metal dichalcogenides (TMDCs) provide ideal systems to explore the EHL state since ineffective screening of the out of plane field lines in these quasi-2D systems allows for stronger charge carrier correlations in contrast to conventional 3D bulk semiconductors and enabling the existence of the EHL at high temperatures...
December 7, 2017: Nano Letters
https://www.readbyqxmd.com/read/29212441/evolution-of-cytokinesis-related-protein-localization-during-the-emergence-of-multicellularity-in-volvocine-green-algae
#6
Yoko Arakaki, Takayuki Fujiwara, Hiroko Kawai-Toyooka, Kaoru Kawafune, Jonathan Featherston, Pierre M Durand, Shin-Ya Miyagishima, Hisayoshi Nozaki
BACKGROUND: The volvocine lineage, containing unicellular Chlamydomonas reinhardtii and differentiated multicellular Volvox carteri, is a powerful model for comparative studies aiming at understanding emergence of multicellularity. Tetrabaena socialis is the simplest multicellular volvocine alga and belongs to the family Tetrabaenaceae that is sister to more complex multicellular volvocine families, Goniaceae and Volvocaceae. Thus, T. socialis is a key species to elucidate the initial steps in the evolution of multicellularity...
December 6, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29210397/recent-progress-in-2d-group-va-semiconductors-from-theory-to-experiment
#7
REVIEW
Shengli Zhang, Shiying Guo, Zhongfang Chen, Yeliang Wang, Hongjun Gao, Julio Gómez-Herrero, Pablo Ares, Félix Zamora, Zhen Zhu, Haibo Zeng
Phosphorene, an emerging two-dimensional material, has received considerable attention due to its layer-controlled direct bandgap, high carrier mobility, negative Poisson's ratio and unique in-plane anisotropy. As cousins of phosphorene, 2D group-VA arsenene, antimonene and bismuthene have also garnered tremendous interest due to their intriguing structures and fascinating electronic properties. 2D group-VA family members are opening up brand-new opportunities for their multifunctional applications encompassing electronics, optoelectronics, topological spintronics, thermoelectrics, sensors, Li- or Na-batteries...
December 6, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/29208632/right-ventricular-exercise-contractile-reserve-and-outcomes-after-early-surgery-for-primary-mitral-regurgitation
#8
Emilie Vitel, Elena Galli, Christophe Leclercq, Maxime Fournet, Christian Bosseau, Hervé Corbineau, Guillame Bouzille, Erwan Donal
OBJECTIVE: To assess if the lack of development of right ventricular (RV) contractile reserve during exercise echocardiography (ex-echo) might be a predictor of postoperative major adverse cardiovascular events (MACEs) in patients with primary mitral regurgitation (pMR) undergoing early surgery. METHODS: Comprehensive resting and ex-echo were performed in 142 asymptomatic patients (58±21 years, 68% men, New York Heart Association functional class ≤2) with isolated severe pMR and preserved left ventricular (LV) function (LV ejection >60%, LV end-systolic diameter <45 mm) undergoing mitral valve replacement (n=20) or repair...
December 5, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29199742/triangle-tripod-and-tetrapod-branched-ito-nanocrystals-for-anisotropic-infrared-plasmonics
#9
Yu Gu, Zhengfeng Zhu, Jizhong Song, Haibo Zeng
While many sophisticated geometries of metallic nanoparticles have been explored for plasmon resonance in the visible light waveband, similar structures for infrared plasmonics have seldom been studied. Herein, for the first time, we report branched colloidal Sn-doped In2O3 (ITO) NCs prepared through heating metal organic precursors in a high boiling solvent and surfactants via a simple one-pot method and their interesting anisotropic infrared plasmonics. Shaped ITO NCs were anisotropically grown into triangles, tripods, and tetrapods from spherical particles by tuning the composition of the surfactants...
December 4, 2017: Nanoscale
https://www.readbyqxmd.com/read/29195320/symmetry-hopf-bifurcation-and-the-emergence-of-cluster-solutions-in-time-delayed-neural-networks
#10
Zhen Wang, Sue Ann Campbell
We consider the networks of N identical oscillators with time delayed, global circulant coupling, modeled by a system of delay differential equations with ZN symmetry. We first study the existence of Hopf bifurcations induced by the coupling time delay and then use symmetric Hopf bifurcation theory to determine how these bifurcations lead to different patterns of symmetric cluster oscillations. We apply our results to a case study: a network of FitzHugh-Nagumo neurons with diffusive coupling. For this model, we derive the asymptotic stability, global asymptotic stability, absolute instability, and stability switches of the equilibrium point in the plane of coupling time delay (τ) and excitability parameter (a)...
November 2017: Chaos
https://www.readbyqxmd.com/read/29191902/numerical-evidence-of-fluctuating-stripes-in-the-normal-state-of-high-tc-cuprate-superconductors
#11
Edwin W Huang, Christian B Mendl, Shenxiu Liu, Steve Johnston, Hong-Chen Jiang, Brian Moritz, Thomas P Devereaux
Upon doping, Mott insulators often exhibit symmetry breaking where charge carriers and their spins organize into patterns known as stripes. For high-transition temperature cuprate superconductors, stripes are widely suspected to exist in a fluctuating form. We used numerically exact determinant quantum Monte Carlo calculations to demonstrate dynamical stripe correlations in the three-band Hubbard model, which represents the local electronic structure of the copper-oxygen plane. Our results, which are robust to varying parameters, cluster size, and boundary conditions, support the interpretation of experimental observations such as the hourglass magnetic dispersion and the Yamada plot of incommensurability versus doping in terms of the physics of fluctuating stripes...
December 1, 2017: Science
https://www.readbyqxmd.com/read/29180742/out-of-plane-heat-transfer-in-van-der-waals-stacks-through-electron-hyperbolic-phonon-coupling
#12
Klaas-Jan Tielrooij, Niels C H Hesp, Alessandro Principi, Mark B Lundeberg, Eva A A Pogna, Luca Banszerus, Zoltán Mics, Mathieu Massicotte, Peter Schmidt, Diana Davydovskaya, David G Purdie, Ilya Goykhman, Giancarlo Soavi, Antonio Lombardo, Kenji Watanabe, Takashi Taniguchi, Mischa Bonn, Dmitry Turchinovich, Christoph Stampfer, Andrea C Ferrari, Giulio Cerullo, Marco Polini, Frank H L Koppens
Van der Waals heterostructures have emerged as promising building blocks that offer access to new physics, novel device functionalities and superior electrical and optoelectronic properties 1-7 . Applications such as thermal management, photodetection, light emission, data communication, high-speed electronics and light harvesting 8-16 require a thorough understanding of (nanoscale) heat flow. Here, using time-resolved photocurrent measurements, we identify an efficient out-of-plane energy transfer channel, where charge carriers in graphene couple to hyperbolic phonon polaritons 17-19 in the encapsulating layered material...
November 27, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/29177330/controlling-the-h-to-t-structural-phase-transition-via-chalcogen-substitution-in-mote2-monolayers
#13
Joshua Young, Thomas L Reinecke
New materials exhibiting reversible structural transitions are desired for a variety of applications, yet they are difficult to identify and stabilize. Monolayer MoTe2 has emerged as a good candidate as it displays a small energy difference between a semiconducting H and semimetallic T' phase; however, switching between the two phases is difficult. Here, we propose using chalcogen alloying to overcome this challenge. Using first principles density functional theory calculations, we investigate 7 MoTe2-xXx alloys (X = N, P, Sb, F, Br, I, and Se) at three concentrations...
November 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29174452/diagnosing-centrally-located-pulmonary-embolisms-in-the-emergency-department-using-point-of-care-ultrasound
#14
Kristin H Dwyer, Joshua S Rempell, Michael B Stone
OBJECTIVE: The study objective was to investigate the combined accuracy of right heart strain on focused cardiac ultrasound (FOCUS) and deep vein thrombosis (DVT) on compression ultrasound (CUS) for identification of centrally located pulmonary embolism (PE) diagnosed on computed tomography pulmonary angiography (CTPA). METHODS: This was a prospective observational study using a convenience sample of patients undergoing CTPA in the emergency department (ED) for evaluation of PE...
November 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29166769/economic-evaluation-of-a-nurse-led-home-and-clinic-based-secondary-prevention-programme-to-prevent-progressive-cardiac-dysfunction-in-high-risk-individuals-the-nurse-led-intervention-for-less-chronic-heart-failure-nil-chf-randomized-controlled-study
#15
Shoko Maru, Joshua Byrnes, Melinda J Carrington, Yih-Kai Chan, Simon Stewart, Paul A Scuffham
OBJECTIVE: The objective of this study was to assess the cost-effectiveness of a long-term, nurse-led, multidisciplinary programme of home/clinic visits in preventing progressive cardiac dysfunction in patients at risk of developing de novo chronic heart failure (CHF). METHODS: A trial-based analysis was conducted alongside a pragmatic, single-centre, open-label, randomized controlled trial of 611 patients (mean age: 66 years) with subclinical cardiovascular diseases (without CHF) discharged to home from an Australian tertiary referral hospital...
November 1, 2017: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/29166425/anatomy-of-the-sphenopalatine-artery-and-its-implications-for-transnasal-neurosurgery
#16
M Eordogh, A Grimm, I Gawish, L Patonay, R Reisch, H R Briner, G Baksa
BACKGROUND: The knowledge of sinonasal vasculature is inevitable in transnasal neurosurgery. We performed an anatomical study on the sphenopalatine artery from the perspective of skull base procedures. METHODOLOGY: To analyse the anatomical landmarks of the sphenopalatine artery, arterial skull corrosion casts (26 head halves) underwent endoscopic transnasal phantom surgery. Furthermore, we performed microsurgical dissection on formaldehyde-fixated cadavers with arterial perfusion (14 head halves) as well as studied Cone Beam CT-scans of anonymised patients and cadavers (115 head sides)...
November 22, 2017: Rhinology
https://www.readbyqxmd.com/read/29166342/important-considerations-for-performing-prepectoral-breast-reconstruction
#17
Hani Sbitany
Prepectoral breast reconstruction has emerged as an excellent technique for postmastectomy reconstruction, as it allows for full preservation of a patient's pectoralis major muscle and chest wall function. This reduces pain, eliminates animation deformity, and results in high patient satisfaction. Safely performed prepectoral breast reconstruction requires a careful patient selection process before committing to the procedure, taking into account comorbidities, radiation status, and oncologic criteria such as tumor location and breast cancer stage...
December 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29165757/clinical-effects-of-ascending-colon-patching-ileorectal-heart-shaped-anastomosis-on-total-colonic-aganglionosis
#18
S-X Li, H-W Zhang, H Cao, H-X Zou, Y-Y Yin, F Sui, X Zhang
OBJECTIVE: We studied the clinical effects of ascending colon patching ileorectal heart-shaped anastomosis in treating total colonic aganglionosis. PATIENTS AND METHODS: From June 2006 to June 2013, 15 children with severe abdominal distension, low small intestine obstruction and intestinal perforation in the neonatal period, were enrolled in this study. In phase I, patients received emergency terminal ileum stoma plus multi-site colonic biopsy and 6 to 12 months later, ascending colon patching ileorectal heart-shaped anastomosis was conducted in phase II...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29165497/analysis-of-optimal-crosslink-density-and-platelet-size-insensitivity-in-graphene-based-artificial-nacres
#19
Kaijin Wu, Zhaoqiang Song, Linghui He, Yong Ni
Exploration of graphene-based artificial nacres with excellent mechanical properties demonstrates the potential to surpass natural nacre. Recent experimental studies report that optimal crosslink density defined as concentration of the surface functional groups is usually observed in these artificial nacres towards superb mechanical performance. A hybrid model integrating a nonlinear shear-lag model and atomistic simulations reveals the emergence of an optimal crosslink density at which the maximum strength and toughness are achieved...
November 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/29161903/spatial-resolution-measurements-using-radia-diagnostic-software-with-sedentexct-image-quality-phantom-in-cone-beam-ct-for-dental-use
#20
Hiroshi Watanabe, Yoshikazu Nomura, Ami Kuribayashi, Tohru Kurabayashi
OBJECTIVES: We aimed to employ the Radia diagnostic software with the Safety and Efficacy of a New Emerging Dental X-ray Modality (SEDENTEXCT) image quality (IQ) phantom in computed tomography (CT), and to evaluate its validity. METHODS: The SEDENTEXCT IQ phantom and Radia diagnostic software were employed. The phantom was scanned using one medical full-body CT and two dento-maxillo-facial cone beam CTs. The obtained images were imported to the Radia software, and the spatial resolution outputs were evaluated...
November 21, 2017: Dento Maxillo Facial Radiology
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