37,456 results match your criteria Orbit: The International Journal on Orbital Disorders Oculoplastic and Lacrimal Surgery [Journal]


Magnetic circular dichroism spectra of transition metal complexes calculated from restricted active space wavefunctions.

Phys Chem Chem Phys 2019 Feb 20. Epub 2019 Feb 20.

Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA.

First principles multiconfigurational restricted active space (RAS) self-consistent field (SCF) or configuration interaction (CI) approaches, augmented with a treatment of spin-orbit coupling by state interaction, were used to calculate the magnetic circular dichroism (MCD) , , and/or for closed- and open-shell transition metal complexes: PdCl42-, PdBr42-, AuCl4-, AuBr4-, MnO4-, CuCl42-, CuBr42-, and Fe(CN)63-. The were determined with a sum-over-states approach. It is shown that reasonably accurate MCD spectra can be obtained directly at a RAS level or at a RAS level augmented with corrections for the dynamic correlation. Read More

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http://dx.doi.org/10.1039/c8cp07849aDOI Listing
February 2019

Arbitrary order exceptional point induced by photonic spin-orbit interaction in coupled resonators.

Nat Commun 2019 Feb 19;10(1):832. Epub 2019 Feb 19.

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China.

Many novel properties of non-Hermitian systems are found at or near the exceptional points-branch points of complex energy surfaces at which eigenvalues and eigenvectors coalesce. In particular, higher-order exceptional points can result in optical structures that are ultrasensitive to external perturbations. Here we show that an arbitrary order exceptional point can be achieved in a simple system consisting of identical resonators placed near a waveguide. Read More

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http://dx.doi.org/10.1038/s41467-019-08826-6DOI Listing
February 2019

Effects of Propamocarb Hydrochloride on Mycelial Growth, Sporulation, and Infection by Phytophthora nicotianae Isolates from Virginia Nurseries.

Plant Dis 2007 Apr;91(4):414-420

Department of Plant Pathology, The Pennsylvania State University, University Park 16802.

Propamocarb hydrochloride is a systemic fungicide commonly used for control of Phytophthora diseases of nursery crops. Here we report on the effect of this compound on different growth stages of Phytophthora nicotianae, a major pathogen of numerous herbaceous and some woody ornamental plants. A total of 71 isolates were assayed for sensitivity to propamocarb at two concentrations of 1. Read More

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http://dx.doi.org/10.1094/PDIS-91-4-0414DOI Listing

Optimization of Reconfigurable Satellite Constellations Using Simulated Annealing and Genetic Algorithm.

Sensors (Basel) 2019 Feb 13;19(4). Epub 2019 Feb 13.

Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Agile Earth observation can be achieved with responsiveness in satellite launches, sensor pointing, or orbit reconfiguration. This study presents a framework for designing reconfigurable satellite constellations capable of both regular Earth observation and disaster monitoring. These observation modes are termed global observation mode and regional observation mode, constituting a reconfigurable satellite constellation (ReCon). Read More

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http://dx.doi.org/10.3390/s19040765DOI Listing
February 2019

Quasi-All-Passive Thermal Control System Design and On-Orbit Validation of Luojia 1-01 Satellite.

Sensors (Basel) 2019 Feb 17;19(4). Epub 2019 Feb 17.

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

In order to resolve the large fluctuations in temperature range problem of Luojia 1-01 satellite caused by low heat inertia and poor thermal conductivity of structure, a quasi-all-passive thermal control system (TCS) design is presented under the conditions of limited resources including mass and power consumption. The effectiveness of the TCS design is verified by both ground thermal balanced test and related telemetry data of on-orbit performance. Firstly, according to the structural features and working modes of the satellite, isothermal design was implemented and the effectiveness was verified by thermal analysis using finite element method. Read More

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http://www.mdpi.com/1424-8220/19/4/827
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http://dx.doi.org/10.3390/s19040827DOI Listing
February 2019
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High Sensitive Night-time Light Imaging Camera Design and In-orbit Test of Luojia1-01 Satellite.

Sensors (Basel) 2019 Feb 15;19(4). Epub 2019 Feb 15.

State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China.

Luojia1-01 satellite is the first scientific experimental satellite applied for night-time light remote sensing data acquisition, and the payload is an optical camera with high sensitivity, high radiation measurement accuracy and stable elements of interior orientation. At the same time, a special shaped hood is designed, which significantly improved the ability of the camera to suppress stray light. Camera electronics adopts the integrated design of focal plane and imaging processing, which greatly reduces the volume and weight of the system. Read More

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http://dx.doi.org/10.3390/s19040797DOI Listing
February 2019

Tuning spin-orbit torques at magnetic domain walls in epitaxial Pt/Co/Pt$_{1-x}$Au$_{x}$ trilayers.

Nanotechnology 2019 Feb 19. Epub 2019 Feb 19.

School of Physics and Astronomy E C Stoner Laboratory, University of Leeds, Leeds, LS2 9JT, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.

Magnetic domain walls in perpendicularly magnetised thin films are attractive for racetrack memories, but technological progress still requires further reduction of the operationing currents. To efficiently drive these objects by the means of electric current, one has to optimize the damping-like torque which is caused by the spin Hall effect. This not only requires a high net spin Hall angle but also the presence of a Dzyaloshinskii-Moriya interaction (DMI) to produce magnetic textures sensitive to this type of the torque. Read More

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http://dx.doi.org/10.1088/1361-6528/ab087bDOI Listing
February 2019

Out-of-plane magnetic anisotropy energy in the NiBz molecule.

Phys Chem Chem Phys 2019 Feb 19. Epub 2019 Feb 19.

Centro de Física de Materiales CFM-MPC CSIC-UPV/EHU, Donostia International Physics Center (DIPC), Departamento de Física de Materiales, Fac. de Químicas, UPVEHU, 20018 San Sebastián, Spain.

Organometallic complexes formed by transition metals clusters and benzene molecules have already been synthesized, and in selected cases display magnetic properties controlled by external magnetic fields. We have studied NinBzn complexes made of nickel atoms surrounded by benzene molecules and here we focus specifically on the magnetic molecule Ni3Bz3. By means of calculations including relativistic spin-orbit terms, we show that this molecule reveals a large magnetic anisotropy energy of approximately 8 meV, found with the easy axis perpendicular to the metal atom plane. Read More

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http://dx.doi.org/10.1039/c8cp04251aDOI Listing
February 2019

Electric field modulation of magnetic exchange in molecular helices.

Nat Mater 2019 Feb 18. Epub 2019 Feb 18.

Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy.

The possibility to operate on magnetic materials through the application of electric rather than magnetic fields-promising faster, more compact and energy efficient circuits-continues to spur the investigation of magnetoelectric effects. Symmetry considerations, in particular the lack of an inversion centre, characterize the magnetoelectric effect. In addition, spin-orbit coupling is generally considered necessary to make a spin system sensitive to a charge distribution. Read More

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http://dx.doi.org/10.1038/s41563-019-0288-5DOI Listing
February 2019

Manipulating exchange bias by spin-orbit torque.

Nat Mater 2019 Feb 18. Epub 2019 Feb 18.

Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan.

Exchange bias, a shift in the hysteresis loop of a ferromagnet arising from interfacial exchange coupling between adjacent ferromagnetic and antiferromagnetic layers, is an integral part of spintronic devices. Here, we show that spin-orbit torque generated from spin current, a promising approach to switch the ferromagnetic magnetization of next-generation magnetic random access memory, can also be used to manipulate the exchange bias. Applying current pulses to a Pt/Co/IrMn trilayer causes concurrent switching of ferromagnetic magnetization and exchange bias, but with different underlying mechanisms. Read More

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http://dx.doi.org/10.1038/s41563-019-0289-4DOI Listing
February 2019

Retinoblastoma discordance in families with twins.

Indian J Ophthalmol 2019 Mar;67(3):436-439

Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, India.

Retinoblastoma has an increased inheritance risk of germline RB1 mutations in offspring and siblings, especially twins. Three families, each having one retinoblastoma-affected twin, were selected for genetic analysis and DNA profiling. Germline RB1 mutations were found in all probands. Read More

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http://www.ijo.in/text.asp?2019/67/3/436/252402
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http://dx.doi.org/10.4103/ijo.IJO_1245_18DOI Listing
March 2019
1 Read

Oral versus single intravenous bolus dose antibiotic prophylaxis against postoperative surgical site infection in external dacryocystorhinostomy for primary acquired nasolacrimal duct obstruction - A randomized study.

Indian J Ophthalmol 2019 Mar;67(3):382-385

Ophthalmic Plastics, Orbit and Ocular Oncology Services, LV Prasad Eye Institute, Bhubaneswar, Odisha, India.

Purpose: To compare the efficacy of a single perioperative bolus dose of intravenous antibiotic versus postoperative oral antibiotic prophylaxis for prevention of surgical site infection (SSI) in external dacryocystorhinostomy (DCR) for primary acquired nasolacrimal duct obstruction (PANDO).

Methods: This was a prospective randomized controlled study with a noninferiority design. Patients undergoing external DCR surgery were randomized into two groups A and B. Read More

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http://www.ijo.in/text.asp?2019/67/3/382/250759
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http://dx.doi.org/10.4103/ijo.IJO_616_18DOI Listing
March 2019
1 Read

To prick or to poke?

Indian J Ophthalmol 2019 Mar;67(3):324

Department of Orbit Oculoplasty Reconstructive and Aesthetic Services, Sankara Nethralaya, Medical Research Foundation, Chennai, Tamil Nadu, India.

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http://dx.doi.org/10.4103/ijo.IJO_763_18DOI Listing

Relationship of clinical presentation and angiographic findings in patients with indirect cavernous carotid fistulae.

J Neurointerv Surg 2019 Feb 18. Epub 2019 Feb 18.

Radiology and Neurological Surgery, Columbia University, New York, USA.

Introduction: Indirect cavernous carotid fistulae (ICCFs) can present with insidious, non-specific symptoms and prove difficult to diagnose. This study evaluates associations among ICCF symptoms and angiographic findings.

Methods: A retrospective analysis was performed of prospectively maintained records at four medical centers to identify patients with ICCFs evaluated with angiography. Read More

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http://dx.doi.org/10.1136/neurintsurg-2018-014421DOI Listing
February 2019

Locally advanced mammary analogue secretory carcinoma of the parotid gland.

Int J Oral Maxillofac Surg 2019 Feb 15. Epub 2019 Feb 15.

Department of Oral and Maxillofacial Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan. Electronic address:

Mammary analogue secretory carcinoma (MASC) has recently been recognized as a salivary gland tumour that is characterized by the ETV6-NTRK3 fusion gene. A case of locally advanced MASC of the parotid gland in a 67-year-old man is presented here. The patient visited the hospital due to a large right infra-auricular mass, which had been enlarging gradually over a period of 2years. Read More

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http://dx.doi.org/10.1016/j.ijom.2019.01.027DOI Listing
February 2019

Needle aspiration for orbital venolymphatic malformation presenting with intralesional hemorrhage in adulthood.

Orbit 2019 Feb 19:1-2. Epub 2019 Feb 19.

a Department of Ophthalmology, Faculty of Medicine , Cairo University , Cairo , Egypt.

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http://dx.doi.org/10.1080/01676830.2019.1582073DOI Listing
February 2019

A novel method for quantifying the biomechanical parameters of orbital soft tissue using a corneal dynamic scheimpflug analyser: a retrospective study.

BMC Ophthalmol 2019 Feb 18;19(1):53. Epub 2019 Feb 18.

Department of Ophthalmology, Seoul St. Mary's Hospital, Catholic University of Korea, Banpodaero 222, Seocho-gu, Seoul, South Korea.

Background: To demonstrate that the Corvis ST could be used to quantify the biomechanical parameters of the orbital soft tissues by measuring and comparing whole eye movement (WEM) using the Corvis in normal eyes and in eyes of patients with Graves ophthalmopathy.

Methods: Forty four eyes of 44 ophthalmologically normal subjects and 28 eyes of 28 patients with Graves ophthalmopathy were included in the study. After Corvis test, the examiners recorded WEM by air puff. Read More

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http://dx.doi.org/10.1186/s12886-019-1064-7DOI Listing
February 2019

Spin-orbit split two-dimensional states of BiTeI/Au(111) interfaces.

J Phys Condens Matter 2019 Feb 18. Epub 2019 Feb 18.

Centro de Física de Materiales CFM -- MPC and Centro Mixto CSIC-UPV/EHU, Donostia / San Sebastián, SPAIN.

We present an ab initio study of interfaces formed by placing a single trilayer of BiTeI on the Au(111) surface. We consider two possible interfaces with the parallel and antiparallel orientation of the trilayer dipole moment with respect to the surface normal, i.e. Read More

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http://dx.doi.org/10.1088/1361-648X/ab07faDOI Listing
February 2019

Monolayer tellurenyne assembled with helical telluryne: structure and transport properties.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University 130022, Changchun, China.

Two-dimensional (2D) crystals are candidate materials for electronics and spintronics, but their deficient carrier mobility, inappreciable spin-orbit coupling effect, and environmental instability have such limited applications. Herein, using density functional theory methods, we propose a novel 2D monolayer material, named tellurenyne, built with an atomic tellurium chain (named telluryne) via a noncovalent bond. The comparable electrostatic and van der Waals contributions to interchain binding enable tellurenyne to exhibit remarkable stabilities and transport properties. Read More

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http://dx.doi.org/10.1039/c9nr00596jDOI Listing
February 2019

Definition and improvement of the concept and tools of a psychosocial intervention program for parents in pediatric oncology: a mixed-methods feasibility study conducted with parents and healthcare professionals.

Pilot Feasibility Stud 2019 6;5:20. Epub 2019 Feb 6.

Sainte-Justine University Health Center, Chaussée de la Côte-Sainte-Catherine, 3175, Montréal, Québec H3T 1C5 Canada.

Background: Studies have shown that supporting parents in pediatric oncology reduces family distress following a cancer diagnosis. Manualized programs for parents have therefore been developed to reduce family distress. However, these programs have limitations that need to be improved, such as better defining programs' procedures, developing interventions focusing on parents' conjugal relationship, conducting rigorous evaluations of implementation, and proposing adaptations to various cultural dimensions. Read More

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http://dx.doi.org/10.1186/s40814-019-0407-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6366012PMC
February 2019

The Origins of Young Stars in the Direction of the Leading Arm of the Magellanic Stream: Abundances, Kinematics, and Orbits.

Astrophys J 2019 24;871(1). Epub 2019 Jan 24.

Key Lab of Optical Astronomy, National Astronomical Observatories, CAS, 20A Datun Road, Chaoyang District, 100012 Beijing, China.

We explore the origins of the young B-type stars found by Casetti-Dinescu et al. (2014) at the outskirts of the Milky-Way disk in the sky region of Leading Arm of the Magellanic Stream. High-resolution spectroscopic observations made with the MIKE instrument on the Magellan Clay 6. Read More

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http://dx.doi.org/10.3847/1538-4357/aaf560DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6376199PMC
January 2019

Trauma-associated Pott's puffy tumor: an ophthalmologic perspective.

Orbit 2019 Feb 18:1-3. Epub 2019 Feb 18.

a Division of Ophthalmology , Ann & Robert H. Lurie Children's Hospital of Chicago , Chicago , IL , USA.

Pott's puffy tumor is a significant complication of frontal sinusitis that leads to frontal bone osteomyelitis and can be associated with frontal swelling, subperiosteal abscess, and intracranial abscess. It may be associated with antecedent trauma and typically presents in adolescents. Orbital involvement is rarely reported. Read More

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http://dx.doi.org/10.1080/01676830.2019.1573909DOI Listing
February 2019

Vascular malformations of the orbit (lymphatic, venous, arteriovenous): Diagnosis, management and results.

J Craniomaxillofac Surg 2018 Sep 20. Epub 2018 Sep 20.

University of Parma, Department of Maxillo Facial Surgery (Head: Prof. Enrico Sesenna), Italy.

Vascular malformations are often found inside the orbit. Isolated venous malformations (frequently misnamed as cavernous hemangiomas) are the most frequent among these. However, also lymphatic and arteriovenous malformations can affect the orbit. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S10105182183076
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http://dx.doi.org/10.1016/j.jcms.2018.09.009DOI Listing
September 2018
4 Reads

Reversibility, pattern formation, and edge transport in active chiral and passive disk mixtures.

J Chem Phys 2019 Feb;150(6):064905

Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

We numerically examine mixtures of circularly moving and passive disks as a function of density and active orbit radius. For low or intermediate densities and/or small orbit radii, the system can organize into a reversible partially phase separated labyrinth state in which there are no collisions between disks, with the degree of phase separation increasing as the orbit radius increases. As a function of orbit radius, we find a divergence in the number of cycles required to reach a collision-free steady state at a critical radius, while above this radius, the system remains in a fluctuating liquid state. Read More

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http://dx.doi.org/10.1063/1.5085209DOI Listing
February 2019

Vibronically and spin-orbit coupled diabatic potentials for X(P) + CH → HX + CH reactions: General theory and application for X(P) = F(P).

J Chem Phys 2019 Feb;150(6):064102

Theoretische Chemie, Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany.

An approach to systematically construct vibronically and spin-orbit coupled diabatic potential energy surfaces (PESs) for X(P) + CH → HX + CH reactions is proposed. Permutational symmetry and permutational invariants of the S group and its S and S × S subgroups are used to construct a diabatic model which properly describes the reaction starting from reactants to products. As a first example, the approach is applied to the construction of diabatic potentials for the F(P) + CH → HF + CH reaction. Read More

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http://dx.doi.org/10.1063/1.5063907DOI Listing
February 2019

Ab initio interaction potentials of the Ba, Ba complexes with Ar, Kr, and Xe in the lowest excited states.

J Chem Phys 2019 Feb;150(6):064314

Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Building 3, Moscow 121205, Russia.

The complexes of the Ba atom and Ba cation with the rare gas atoms Ar, Kr, and Xe in the states associated with the 6s → 5d, 6p excitations are investigated by means of the multireference configuration interaction techniques. Scalar relativistic potentials are obtained by the complete basis limit extrapolation through the sequence of aug-cc-pwCVnZ basis sets with the cardinal numbers n = Q, T, 5, combined with the suitable effective core potentials and benchmarked against the coupled cluster with singles, doubles, and non-iterative triples calculations and the literature data available for selected electronic states. Spin-orbit coupling is taken into account by means of the state-interacting multireference configuration interaction calculations performed for the Breit-Pauli spin-orbit Hamiltonian. Read More

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http://dx.doi.org/10.1063/1.5071457DOI Listing
February 2019
1 Read

Additive atomic approximation for relativistic effects: A two-component Hamiltonian for molecular electronic structure calculations.

Authors:
Dimitri N Laikov

J Chem Phys 2019 Feb;150(6):061103

Chemistry Department, Moscow State University, 119991 Moscow, Russia.

An approximate relativistic two-component Hamiltonian for use in molecular electronic structure calculations is derived in the form of a sum of fixed atom-centered kinetic and spin-orbit operators added to the non-relativistic Hamiltonian. Starting from the well-known zeroth-order regular approximation, further steps are taken to get rid of its nonlinearity in the potential, ending up with a simple formulation with easily computable integrals that can seamlessly work with any traditional electronic structure method. Molecular tests show a good accuracy of this approximation. Read More

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http://dx.doi.org/10.1063/1.5082231DOI Listing
February 2019

Resonance Microwave Measurements of an Intrinsic Spin-Orbit Coupling Gap in Graphene: A Possible Indication of a Topological State.

Phys Rev Lett 2019 Feb;122(4):046403

Center for Hybrid Nanostructures (CHyN), University of Hamburg, Luruper Chaussee 149, 22607 Hamburg, Germany.

In 2005, Kane and Mele [Phys. Rev. Lett. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.046403DOI Listing
February 2019

Development of Red Exciplex for Efficient OLEDs by Employing a Phosphor as a Component.

Front Chem 2019 31;7:16. Epub 2019 Jan 31.

Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China.

Exciplexes are ideal candidates as effective thermally activated delayed fluorescence (TADF) emitters. However, efficient orange and red TADF exciplexes have been reported seldomly, because their significant non-radiative (NR) decay of excited states lead to unavoidable energy loss. Herein, we propose a novel strategy to construct efficient red TADF exciplexes by introducing phosphor as one component. Read More

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http://dx.doi.org/10.3389/fchem.2019.00016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6365432PMC
January 2019
1 Read

Unusual Sites of Metastatic and Benign I 131 Uptake in Patients with Differentiated Thyroid Carcinoma.

Indian J Endocrinol Metab 2018 Nov-Dec;22(6):740-750

Department of Nuclear Medicine and Molecular Imaging, Amrita Institute of Medical Sciences, Amrita Vishwavidyapeetham, Cochin, Kerala, India.

Introduction: Differentiated thyroid carcinoma (DTC) is the most common pathological type of thyroid carcinoma, which includes papillary and follicular subtypes. DTC is usually indolent, characterized by good prognosis, and long-term survival. Total thyroidectomy is the mainstay of treatment in DTC which is followed by diagnostic whole body 131I (WBI) scan. Read More

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http://dx.doi.org/10.4103/ijem.IJEM_70_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6330860PMC
February 2019
2 Reads

Unilateral Congenital Nasolacrimal Duct Obstruction, Is It An Amblyogenic Factor?

Middle East Afr J Ophthalmol 2018 Jul-Dec;25(3-4):156-160

Research Department, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.

Background/aims: To evaluate the refractive status, axial length, and prevalence of amblyopia among Saudi children with unilateral congenital nasolacrimal duct obstruction (UCNLDO) compared to the unaffected fellow eye.

Methods: A retrospective chart review was performed for children with UCNLDO at two eye institutes in Eastern Saudi Arabia from 2009 to 2015. The outcomes of syringing determined UNCLDO. Read More

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http://www.meajo.org/text.asp?2018/25/3/156/249327
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http://dx.doi.org/10.4103/meajo.MEAJO_3_17DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348941PMC
February 2019
1 Read

Invasive sino-orbital fungal infections in immunocompetent patients: a clinico-pathological study.

Eye (Lond) 2019 Feb 14. Epub 2019 Feb 14.

Department of Orbit, Oculoplasty & Ocular Oncology, Aravind Eye Hospital, Madurai, India.

Objective: Invasive sino-orbital fungal infections in immunocompetent patients are a rare clinical entity; the diagnosis and management of which is challenging. We present a large case series of invasive sino-orbital fungal granulomas in patients without pre-existing systemic immunocomprimising condition.

Design: Retrospective case series. Read More

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http://dx.doi.org/10.1038/s41433-019-0358-6DOI Listing
February 2019

Field-Tunable 0-π-Transitions in SnTe Topological Crystalline Insulator SQUIDs.

Sci Rep 2019 Feb 13;9(1):1987. Epub 2019 Feb 13.

Institut Néel, CNRS and University Grenoble-Alpes, 25 Rue des Martyrs, F-38042, Grenoble, France.

The manifestation of spin-orbit interactions, long known to dramatically affect the band structure of heavy-element compounds, governs the physics in the surging class of topological matter. A particular example is found in the new family of topological crystalline insulators. In this systems transport occurs at the surfaces and spin-momentum locking yields crystal-symmetry protected spin-polarized transport. Read More

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http://dx.doi.org/10.1038/s41598-018-38008-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374487PMC
February 2019

Spin-momentum locked spin manipulation in a two-dimensional Rashba system.

Sci Rep 2019 Feb 13;9(1):1909. Epub 2019 Feb 13.

Department of Materials Science, Tohoku University, 6-6-02 Aramaki-Aza Aoba, Aoba-ku, Sendai, 980-8579, Japan.

Spin-momentum locking, which constrains spin orientation perpendicular to electron momentum, is attracting considerable interest for exploring various spin functionalities in semiconductors and topological materials. Efficient spin generation and spin detection have been demonstrated using the induced helical spin texture. Nevertheless, spin manipulation by spin-momentum locking remains a missing piece because, once bias voltage is applied to induce the current flow, the spin orientation must be locked by the electron momentum direction, thereby rendering spin phase control difficult. Read More

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http://dx.doi.org/10.1038/s41598-018-37967-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374388PMC
February 2019

Temporal network alignment via GoT-WAVE.

Bioinformatics 2019 Feb 13. Epub 2019 Feb 13.

CRACS & INESC-TEC, Faculdade de Ciências, Universidade do Porto, R. Campo Alegre, Porto, Portugal.

Motivation: Network alignment (NA) finds conserved regions between two networks. NA methods optimize node conservation (NC) and edge conservation (EC). Dynamic graphlet degree vectors (DGDVs) are a state-of-the-art dynamic NC measure, used within the fastest and most accurante NA method for temporal networks: DynaWAVE. Read More

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http://dx.doi.org/10.1093/bioinformatics/btz119DOI Listing
February 2019

Vascular Floor of Mouth Mass with Unanticipated Intracranial, Orbital, and Vertebral Associated Involvements.

Head Neck Pathol 2019 Feb 13. Epub 2019 Feb 13.

, Irvine, CA, USA.

We report on a case in which a blanching, unobtrusive oral growth proved to be a systemic threat. A blind, epileptic child presented with a bleeding oral floor mass of 4 weeks. Biopsy showed small, dilated vascular spaces with reactive fibroblasts. Read More

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http://dx.doi.org/10.1007/s12105-019-01017-1DOI Listing
February 2019

A Classic Neurocysticercosis Case with an Unusual Complication.

Eur J Case Rep Intern Med 2018 31;5(1):000762. Epub 2018 Jan 31.

Infectious Diseases Department, Hospital de Santa Maria, Lisbon, Portugal.

Cysticercosis is triggered by infection with the larval form of the tapeworm . The usual sites for the development of cyscticerci are the central nervous system (neurocysticercosis - NCC), subcutaneous tissue, skeletal muscle, heart muscle, and the eye. Ocular cysticercosis is caused by the growth of the larvae within ocular tissues. Read More

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http://dx.doi.org/10.12890/2017_000762DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6346944PMC
January 2018
1 Read

Ferromagnetism above 1000 K in a highly cation-ordered double-perovskite insulator SrOsO.

Nat Commun 2019 Feb 12;10(1):535. Epub 2019 Feb 12.

NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.

Magnetic insulators have wide-ranging applications, including microwave devices, permanent magnets and future spintronic devices. However, the record Curie temperature (T), which determines the temperature range in which any ferri/ferromagnetic system remains stable, has stood still for over eight decades. Here we report that a highly B-site ordered cubic double-perovskite insulator, SrOsO, has the highest T (of ~1060 K) among all insulators and oxides; also, this is the highest magnetic ordering temperature in any compound without 3d transition elements. Read More

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http://dx.doi.org/10.1038/s41467-019-08440-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6372617PMC
February 2019

Does postoperative orbital volume predict postoperative globe malposition after blow-out fracture reconstruction? A 6-month clinical follow-up study.

Oral Maxillofac Surg 2019 Feb 12. Epub 2019 Feb 12.

Department of Oral and Maxillofacial Diseases, University of Turku and Turku University Hospital, Turku, Finland.

Purpose: The aim of this study was to investigate the relationship between intraorbital volume change caused by orbital fracture and globe malposition (GMP) in blow-out fracture patients undergoing surgery and to clarify the significance of different radiologically detected predictors associated with GMP.

Patients And Methods: A 6-month prospective follow-up study of unilateral isolated orbital fractures was designed and implemented. The main outcome variable was GMP (present or absent); the secondary outcome was orientation of GMP (horizontal or vertical). Read More

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http://dx.doi.org/10.1007/s10006-019-00748-3DOI Listing
February 2019

Pseudocystic appearance of an orbital carcinoid metastasis.

Orbit 2019 Feb 12:1-4. Epub 2019 Feb 12.

a Department of Ophthalmology & Visual Sciences , University of Adelaide , Adelaide , Australia.

Carcinoid tumours are a low-grade neuroendocrine malignancy that infrequently metastisizes to orbital structures. The typical radiological appearance of carcinoid is a solid, well-circumscribed mass that enhances with contrast. We present a case of orbital carcinoid metastasis with pseudocystic radiological appearance and review of the literature. Read More

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http://dx.doi.org/10.1080/01676830.2019.1576739DOI Listing
February 2019

A stone in the lacrimal gland: a case report and literature review.

Orbit 2019 Feb 12:1-5. Epub 2019 Feb 12.

a Department of Oculoplastic, Orbital, and Lacrimal Surgery , Aichi Medical University Hospital , Nagakute , Aichi , Japan.

A 59-year-old man presented with recurrent localized redness of the right eye for 3 months duration despite topical antibiotic and steroid administration. Examination revealed focal conjunctival injection in the temporal region and a palpable right lacrimal gland. During incisional biopsy, a small, white, hard mass was noted within the lacrimal gland, which was surgically removed. Read More

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https://www.tandfonline.com/doi/full/10.1080/01676830.2019.1
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http://dx.doi.org/10.1080/01676830.2019.1576741DOI Listing
February 2019
2 Reads

"Plugged In".

Orbit 2019 Feb 12:1-2. Epub 2019 Feb 12.

c Department of Ophthalmology, Harvard Medical School , Boston Children's Hospital , Boston , Massachusetts , USA.

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http://dx.doi.org/10.1080/01676830.2019.1576742DOI Listing
February 2019

Resonant inelastic x-ray incarnation of Young's double-slit experiment.

Sci Adv 2019 Jan 18;5(1):eaav4020. Epub 2019 Jan 18.

II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.

Young's archetypal double-slit experiment forms the basis for modern diffraction techniques: The elastic scattering of waves yields an interference pattern that captures the real-space structure. Here, we report on an inelastic incarnation of Young's experiment and demonstrate that resonant inelastic x-ray scattering (RIXS) measures interference patterns, which reveal the symmetry and character of electronic excited states in the same way as elastic scattering does for the ground state. A prototypical example is provided by the quasi-molecular electronic structure of insulating BaCeIrO with structural Ir dimers and strong spin-orbit coupling. Read More

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http://dx.doi.org/10.1126/sciadv.aav4020DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6357738PMC
January 2019

Origin of Room-Temperature Ferromagnetism in Hydrogenated Epitaxial Graphene on Silicon Carbide.

Nanomaterials (Basel) 2019 Feb 8;9(2). Epub 2019 Feb 8.

Molecular Materials and Nanosystems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.

The discovery of room-temperature ferromagnetism of hydrogenated epitaxial graphene on silicon carbide challenges for a fundamental understanding of this long-range phenomenon. Carbon allotropes with their dispersive electron states at the Fermi level and a small spin-orbit coupling are not an obvious candidate for ferromagnetism. Here we show that the origin of ferromagnetism in hydrogenated epitaxial graphene with a relatively high Curie temperature (>300 K) lies in the formation of curved specific carbon site regions in the graphene layer, induced by the underlying Si-dangling bonds and by the hydrogen bonding. Read More

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http://dx.doi.org/10.3390/nano9020228DOI Listing
February 2019

Mosses in Low Earth Orbit: Implications for the Limits of Life and the Habitability of Mars.

Astrobiology 2019 Feb;19(2):221-232

1 Biodiversity Research/Systematic Botany, University of Potsdam, Potsdam, Germany.

As a part of the European Space Agency mission "EXPOSE-R2" on the International Space Station (ISS), the BIOMEX (Biology and Mars Experiment) experiment investigates the habitability of Mars and the limits of life. In preparation for the mission, experimental verification tests and scientific verification tests simulating different combinations of abiotic space- and Mars-like conditions were performed to analyze the resistance of a range of model organisms. The simulated abiotic space- and Mars-stressors were extreme temperatures, vacuum, and Mars-like surface ultraviolet (UV) irradiation in different atmospheres. Read More

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http://dx.doi.org/10.1089/ast.2018.1889DOI Listing
February 2019

A Desert Cyanobacterium under Simulated Mars-like Conditions in Low Earth Orbit: Implications for the Habitability of Mars.

Astrobiology 2019 Feb;19(2):158-169

2 German Aerospace Center, Institute of Planetary Research, Management and Infrastructure, Astrobiological Laboratories, Berlin, Germany.

In the ESA space experiment BIOMEX (BIOlogy and Mars EXperiment), dried Chroococcidiopsis cells were exposed to Mars-like conditions during the EXPOSE-R2 mission on the International Space Station. The samples were exposed to UV radiation for 469 days and to a Mars-like atmosphere for 722 days, approaching the conditions that could be faced on the surface of Mars. Once back on Earth, cell survival was tested by growth-dependent assays, while confocal laser scanning microscopy and PCR-based assay were used to analyze the accumulated damage in photosynthetic pigments (chlorophyll a and phycobiliproteins) and genomic DNA, respectively. Read More

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http://dx.doi.org/10.1089/ast.2017.1807DOI Listing
February 2019

Limits of Life and the Habitability of Mars: The ESA Space Experiment BIOMEX on the ISS.

Astrobiology 2019 Feb;19(2):145-157

23 Department of Ecological and Biological Sciences, University of Tuscia, Viterbo, Italy.

BIOMEX (BIOlogy and Mars EXperiment) is an ESA/Roscosmos space exposure experiment housed within the exposure facility EXPOSE-R2 outside the Zvezda module on the International Space Station (ISS). The design of the multiuser facility supports-among others-the BIOMEX investigations into the stability and level of degradation of space-exposed biosignatures such as pigments, secondary metabolites, and cell surfaces in contact with a terrestrial and Mars analog mineral environment. In parallel, analysis on the viability of the investigated organisms has provided relevant data for evaluation of the habitability of Mars, for the limits of life, and for the likelihood of an interplanetary transfer of life (theory of lithopanspermia). Read More

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http://dx.doi.org/10.1089/ast.2018.1897DOI Listing
February 2019

Characterization of Viability of the Lichen Buellia frigida After 1.5 Years in Space on the International Space Station.

Astrobiology 2019 Feb;19(2):233-241

1 Institute of Botany, Heinrich Heine University, Duesseldorf, Germany.

The lichen Buellia frigida was exposed to space and simulated Mars analog conditions in the Biology and Mars Experiment (BIOMEX) project operated outside the International Space Station (ISS) for 1.5 years. To determine the effects of the Low Earth Orbit (LEO) conditions on the lichen symbionts, a LIVE/DEAD staining analysis test was performed. Read More

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http://dx.doi.org/10.1089/ast.2018.1894DOI Listing
February 2019

Tomonaga-Luttinger liquid behavior and spinon confinement in YbAlO.

Nat Commun 2019 Feb 11;10(1):698. Epub 2019 Feb 11.

Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.

Low dimensional quantum magnets are interesting because of the emerging collective behavior arising from strong quantum fluctuations. The one-dimensional (1D) S = 1/2 Heisenberg antiferromagnet is a paradigmatic example, whose low-energy excitations, known as spinons, carry fractional spin S = 1/2. These fractional modes can be reconfined by the application of a staggered magnetic field. Read More

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http://dx.doi.org/10.1038/s41467-019-08485-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370837PMC
February 2019

Dried Biofilms of Desert Strains of Chroococcidiopsis Survived Prolonged Exposure to Space and Mars-like Conditions in Low Earth Orbit.

Astrobiology 2019 Feb 11. Epub 2019 Feb 11.

3 German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany.

Dried biofilms and dried multilayered planktonic counterparts obtained from three desert strains of Chroococcidiopsis were exposed to low Earth conditions by using the EXPOSE-R2 facility outside the International Space Station. During the space mission, samples in Tray 1 (space vacuum and solar radiation, from λ ≈ 110 nm) and Tray 2 (Mars-like UV flux, λ > 200 nm and Mars-like atmosphere) received total UV (200-400 nm) fluences of about 4.58 × 10 kJ/m and 4. Read More

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http://dx.doi.org/10.1089/ast.2018.1900DOI Listing
February 2019