37,773 results match your criteria Orbit: The International Journal on Orbital Disorders Oculoplastic and Lacrimal Surgery [Journal]


Ultra-efficient spin-orbit torque induced magnetic switching in W/CoFeB/MgO structures.

Nanotechnology 2019 Apr 24. Epub 2019 Apr 24.

Fert Beijing Institute, Beihang University, Beijing, 100193, CHINA.

The spin-orbit torque (SOT) induced magnetic switching in heavy metal/ferromagnet (HM/FM) structures with perpendicular magnetic anisotropy (PMA) is promising for energy-efficient spintronic devices. Here, we studied the SOT induced magnetic switching in perpendicular W/Co20Fe60B20/MgO structures. We demonstrated the critical current density for the SOT induced switching is as low as 1. Read More

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http://iopscience.iop.org/article/10.1088/1361-6528/ab1c02
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http://dx.doi.org/10.1088/1361-6528/ab1c02DOI Listing
April 2019
1 Read

Signatures of Majorana doublet in the Fano-Rashba interferometer.

J Phys Condens Matter 2019 Apr 24. Epub 2019 Apr 24.

College of Sciences, Northeastern University, Shenyang 110004, P.R CHINA, Shenyang, CHINA.

We theoretically study the quantum transport through a Fano-Rashba interferometer with an embedded Majorana doublet which generates at one end of the DIII-class topological superconductor. It shows that the Rasbha spin-orbit interaction in the reference arm drives the apparent and terminal-dependence spin polarizations of the electron tunneling and crossed Andreev reflection, accompanied by their opposite directions. However, spin degeneracy holds in the local Andreev reflection. Read More

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http://dx.doi.org/10.1088/1361-648X/ab1beeDOI Listing

A Variational Relativistic Two-Component Complete Active Space Self-Consistent Field Method.

J Chem Theory Comput 2019 Apr 24. Epub 2019 Apr 24.

The accurate description of the electronic structure of transition metals and their compounds can be complicated by both the large number of close-lying states that often have multi-configurational nature in addition to significant relativistic effects. In order to address these challenges we present a two-component complete-active-space self-consistent field method that includes scalar relativistic effects and one-electron spin-orbit coupling during the self-consistent wave function optimization procedure. These relativistic effects are included via an "exact two-component" transformation of the solution of the one-electron modified Dirac equation. Read More

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http://dx.doi.org/10.1021/acs.jctc.9b00011DOI Listing

Activation of Water by Thorium Cation: A Guided Ion Beam and Quantum Chemical Study.

J Am Soc Mass Spectrom 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemistry, University of Utah, Salt Lake City, UT, 84112-0850, USA.

The reaction of atomic thorium cations with deuterated water as a function of kinetic energy from thermal to 10 eV was studied using guided ion beam tandem mass spectrometry. At thermal energies, both ThO + D and DThO + D are formed in barrierless exothermic processes and reproduce results in the literature obtained using ion cyclotron resonance mass spectrometry. As the energy is increased, the branching ratio between these two channels changes such that the dominant product changes from ThO to DThO and back to ThO, until ThD + OD is energetically available and is the dominant product channel. Read More

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http://dx.doi.org/10.1007/s13361-019-02162-1DOI Listing

Feasibility of Re-irradiation using carbon ions for recurrent head and neck malignancies after carbon-ion radiotherapy.

Radiother Oncol 2019 Apr 19;136:148-153. Epub 2019 Apr 19.

Hospital of the National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Sciences and Technology, Chiba, Japan.

Background And Purpose: Locoregional recurrence after carbon-ion radiotherapy (CIRT) for primary head and neck malignancies, such as malignant mucosal melanoma, adenoid cystic carcinoma, and sarcoma, occurs occasionally. However, the treatment options are limited. We report on the toxicity and efficacy of re-irradiation using carbon ions for recurrent head and neck malignancies after CIRT. Read More

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http://dx.doi.org/10.1016/j.radonc.2019.04.007DOI Listing

Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites.

Sensors (Basel) 2019 Apr 14;19(8). Epub 2019 Apr 14.

Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy.

In August 2016, Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. If these satellites could be used, an improvement in the position accuracy would be achieved. A small error in the ephemeris would impact the accuracy of positioning up to ±2. Read More

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http://dx.doi.org/10.3390/s19081786DOI Listing

Reversible Mapping and Sorting the Spin of Photons on the Nanoscale: A Spin-Optical Nano Device.

Nano Lett 2019 Apr 23. Epub 2019 Apr 23.

The photon spin is an important resource for quantum information processing as is the electron spin in spintronics. However, for subwavelength confined optical excitations, polarization as a global property of a mode cannot be defined. Here, we show that any polarization state of a plane-wave photon can reversibly be mapped to a pseudo-spin embodied by the two fundamental modes of a subwavelength plasmonic two-wire transmission line. Read More

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http://dx.doi.org/10.1021/acs.nanolett.9b01162DOI Listing

Preferred Magnetic Excitations in the Iron-Based Sr_{1-x}Na_{x}Fe_{2}As_{2} Superconductor.

Phys Rev Lett 2019 Jan;122(1):017001

International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.

With spin-orbit coupling, both local-moment magnetism and itinerant electrons are expected to behave anisotropically in spin space, but such effects' influence on the formation of unconventional superconductivity has been hitherto unexplored. Here, in an iron-based superconductor, Sr_{1-x}Na_{x}Fe_{2}As_{2}, we report spectroscopic evidence that itinerant electrons "prefer" to be assisted by c-axis polarized magnetic excitations in their formation of superconducting Cooper pairs, against the polarization of the local-moment excitations. Our result naturally explains why the superconductivity competes strongly with the tetragonal magnetic phase in this material, and provides a fresh view on how to make a good superconductor out of a magnetic "Hund's metal. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.017001DOI Listing
January 2019

Interaction-Driven Surface Chern Insulator in Nodal Line Semimetals.

Authors:
Wei Chen J L Lado

Phys Rev Lett 2019 Jan;122(1):016803

Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland.

Nodal line semimetals are characterized by nontrivial bulk-band crossings, giving rise to almost flat drumheadlike surface states (DSS), which provide an attractive playground where interaction can induce symmetry-broken states and potential emergent phases. Here, we show that electronic interaction drives a Stoner ferromagnetic instability in the DSS while the bulk remains nonmagnetic, which together with spin-orbit coupling drive the surface states into a 2D Chern insulator. We show that each piece of DSS carries a half-integer topological charge, which for systems containing two pieces of DSS yield a net Chern number C=-1. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.016803DOI Listing
January 2019

Tunable Two-Photon Quantum Interference of Structured Light.

Phys Rev Lett 2019 Jan;122(1):013601

Dipartimento di Fisica, Sapienza Università di Roma, I-00185 Roma, Italy.

Structured photons are nowadays an important resource in classical and quantum optics due to the richness of properties they show under propagation, focusing, and in their interaction with matter. Vectorial modes of light in particular, a class of modes where the polarization varies across the beam profile, have already been used in several areas ranging from microscopy to quantum information. One of the key ingredients needed to exploit the full potential of complex light in the quantum domain is the control of quantum interference, a crucial resource in fields like quantum communication, sensing, and metrology. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.013601DOI Listing
January 2019

Generation and Detection of Pure Spin Current in an H-Shaped Structure of a Single Metal.

Phys Rev Lett 2019 Jan;122(1):016804

Department of Physics, State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China.

Distinct from all the existing methods for determining the spin Hall angle with bilayers, we have developed a new approach based on the mesoscopic H-shaped structure, which generates and detects pure spin current in a single metal. Using this approach we have unequivocally addressed the long-standing controversy of the magnitude of the spin Hall angle of gold. By exploiting the long spin diffusion length of Cu and the large spin-orbit coupling of Bi, we have realized a very large spin Hall effect in 10 nm Cu films delta doped with 0. Read More

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https://link.aps.org/doi/10.1103/PhysRevLett.122.016804
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http://dx.doi.org/10.1103/PhysRevLett.122.016804DOI Listing
January 2019
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Aromaticity and photophysics of tetrasila- and tetragerma-annelated tetrathienylenes as new representatives of the hetero[8]circulene family.

Phys Chem Chem Phys 2019 Apr 23. Epub 2019 Apr 23.

Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691, Stockholm, Sweden. and Tomsk State University, 36 Lenin Avenue, Tomsk, Russia.

The electronic structure, absorption and emission spectra, aromaticity and photophysical behavior of the recently synthesized tetrasilatetrathia[8]circulene and tetragermatetrathia[8]circulene compounds have been studied computationally. Both compounds demonstrate a specific bifacial aromaticity, which is unusual for hetero[8]circulenes; the inner eight-membered core sustains an expected strong paratropic magnetically-induced ring current, while the outer perimeter contains saturated Si(Et)2 and Ge(Et)2 moieties which break the conjugation between the thiophene rings. The overall magnetically-induced ring current for both studied circulenes is close to zero because of the strong local diatropic currents in each thiophene ring that compensate the paratropic counterpart. Read More

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http://dx.doi.org/10.1039/c9cp01608bDOI Listing

Nasopharyngeal Angiofibroma Staging with a Novel Nominal Basis: An 18-Year Study in a Tertiary Center.

Otolaryngol Head Neck Surg 2019 Apr 23:194599819842155. Epub 2019 Apr 23.

2 Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Mansoura University, Mansoura, Egypt.

Objective: To develop a systematic method for anatomic mapping of juvenile nasopharyngeal angiofibroma (JNA) tumors to standardize communication, facilitate surgical planning, and convey prognosis.

Study Design: Retrospective cohort.

Setting: Tertiary referral center. Read More

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http://dx.doi.org/10.1177/0194599819842155DOI Listing

Thermal skyrmion diffusion used in a reshuffler device.

Nat Nanotechnol 2019 Apr 22. Epub 2019 Apr 22.

Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany.

Magnetic skyrmions in thin films can be efficiently displaced with high speed by using spin-transfer torques and spin-orbit torques at low current densities. Although this favourable combination of properties has raised expectations for using skyrmions in devices, only a few publications have studied the thermal effects on the skyrmion dynamics. However, thermally induced skyrmion dynamics can be used for applications such as unconventional computing approaches, as they have been predicted to be useful for probabilistic computing devices. Read More

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http://www.nature.com/articles/s41565-019-0436-8
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http://dx.doi.org/10.1038/s41565-019-0436-8DOI Listing
April 2019
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A new species of Crocodile Newt, genus (Amphibia, Caudata, Salamandridae) from the mountains of Kachin State, northern Myanmar.

Zool Res 2019 May 28;40(3):151-174. Epub 2019 Mar 28.

Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia.

We describe a new species of the genus from Ingyin Taung Mt., Mohnyin Township, Kachin State, Myanmar, based on morphological and molecular evidence. The new species is assigned to the subgenus s. Read More

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http://dx.doi.org/10.24272/j.issn.2095-8137.2019.043DOI Listing

X-ray Pulsar-Based Navigation Considering Spacecraft Orbital Motion and Systematic Biases.

Sensors (Basel) 2019 Apr 19;19(8). Epub 2019 Apr 19.

School of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, 2nd Street, Hangzhou 310018, China.

The accuracy of X-ray pulsar-based navigation is greatly affected by the Doppler effect caused by the spacecraft orbital motion and the systematic biases introduced by the pulsar directional error, spacecraft-borne clock error, etc. In this paper, an innovative navigation method simultaneously employing the pulse phase (PP), the difference of two neighbor PPs (DPP) and the Doppler frequency (DF) of X-ray pulsars as measurements is proposed to solve this problem. With the aid of the spacecraft orbital dynamics, a single pair of PP and DF relative to the spacecraft's state estimation error can be estimated by using the joint probability density function of the arrival photon timestamps as the likelihood function. Read More

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https://www.mdpi.com/1424-8220/19/8/1877
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http://dx.doi.org/10.3390/s19081877DOI Listing
April 2019
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On-Orbit Performance of the Instrument onboard the .

Sol Phys 2018 23;293(3):45. Epub 2018 Feb 23.

1W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 9430 USA.

The (HMI) instrument is a major component of NASA's (SDO) spacecraft. Since commencement of full regular science operations on 1 May 2010, HMI has operated with remarkable continuity, during the more than five years of the SDO prime mission that ended 30 September 2015, HMI collected 98.4% of all possible 45-second velocity maps; minimizing gaps in these full-disk Dopplergrams is crucial for helioseismology. Read More

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http://link.springer.com/10.1007/s11207-018-1259-8
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http://dx.doi.org/10.1007/s11207-018-1259-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6445534PMC
February 2018
1 Read

Orbital Rosai-Dorfman Disease: A Case Report and Literature Review.

J Microsc Ultrastruct 2019 Jan-Mar;7(1):50-52

Department of Pathology, King Faisal Specialist Hospital and Research Centre, Jeddah, Saudi Arabia.

A 53-year-old male presented with dropping of the right eyelid associated with decreased visual acuity for 4 months. He also complained of vertical diplopia especially when looking down. Ophthalmological examination revealed right blepharospasm associated with right hypertropia. Read More

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http://www.jmau.org/text.asp?2019/7/1/50/254065
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http://dx.doi.org/10.4103/JMAU.JMAU_45_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6442326PMC
April 2019
1 Read

Structure of the Current Sheet in the 11 July 2017 Electron Diffusion Region Event.

J Geophys Res Space Phys 2019 Feb 27;124(2):1173-1186. Epub 2019 Feb 27.

Space Science Center University New Hampshire Durham NH USA.

The structure of the current sheet along the Magnetospheric Multiscale (MMS) orbit is examined during the 11 July 2017 Electron Diffusion Region (EDR) event. The location of MMS relative to the X-line is deduced and used to obtain the spatial changes in the electron parameters. The electron velocity gradient values are used to estimate the reconnection electric field sustained by nongyrotropic pressure. Read More

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http://dx.doi.org/10.1029/2018JA026028DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472497PMC
February 2019

Transport and Loss of Ring Current Electrons Inside Geosynchronous Orbit During the 17 March 2013 Storm.

J Geophys Res Space Phys 2019 Feb 1;124(2):915-933. Epub 2019 Feb 1.

Los Alamos National Laboratory Los Alamos NM USA.

Ring current electrons (1-100 keV) have received significant attention in recent decades, but many questions regarding their major transport and loss mechanisms remain open. In this study, we use the four-dimensional Versatile Electron Radiation Belt code to model the enhancement of phase space density that occurred during the 17 March 2013 storm. Our model includes global convection, radial diffusion, and scattering into the Earth's atmosphere driven by whistler-mode hiss and chorus waves. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1029/2018JA026031
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http://dx.doi.org/10.1029/2018JA026031DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472511PMC
February 2019
1 Read

External dacryocystorhinostomy for isolated lacrimal sac rhinosporidiosis - A suitable alternative to dacryocystectomy.

Indian J Ophthalmol 2019 May;67(5):665-668

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

Purpose: To describe the outcome of external dacryocystorhinostomy (DCR) as a suitable alternative to dacryocystectomy (DCT) in cases of isolated lacrimal sac rhinosporidiosis.

Methods: This was a retrospective, interventional case series. Institutional review board approval was obtained for the study. Read More

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http://dx.doi.org/10.4103/ijo.IJO_1136_18DOI Listing
May 2019
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Commentary: Relevance of orbital measurements for the orbit surgeon.

Authors:
Lakshmi Mahesh

Indian J Ophthalmol 2019 May;67(5):664

Cosultant Orbit and Oculoplasty Surgeon, Manipal Hospital, Bangalore, Karnataka, India.

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http://dx.doi.org/10.4103/ijo.IJO_690_19DOI Listing

Computed tomography imaging-based normative orbital measurement in Indian population.

Indian J Ophthalmol 2019 May;67(5):659-663

Department of Radio-diagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

Purpose: This study aims to evaluate normal orbital structures with nonenhanced computed tomography (NCCT) and determine normative data for the Indian population.

Methods: CT images of the orbits of 100 patients were retrospectively reviewed on a work station to record the normative data of the orbits. Clinical details of all patients were reviewed to ensure that they did not have ocular/orbital diseases. Read More

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http://dx.doi.org/10.4103/ijo.IJO_1187_18DOI Listing

Passive eye movements induced by electromagnetic force (EMF) in rats.

Zool Res 2019 May;40(3):211-218

Departments of Otolaryngology and Communicative Sciences, University of Mississippi Medical Center, Jackson MS 39216,

Accurate information on eye position in the orbit is available from visual feedback, efference copy of the oculomotor commands and proprioceptive signals from the extraocular muscles (EOM). Whereas visual feedback and oculomotor commands have been extensively studied, central processing of EOM proprioceptive signals remains to be elucidated. A challenge to the field is to develop an approach to induce passive eye movements without physically contacting the eyes. Read More

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http://dx.doi.org/10.24272/j.issn.2095-8137.2019.024DOI Listing

Analytical energy gradients for ionized states using equation-of-motion coupled-cluster theory with spin-orbit coupling.

J Chem Phys 2019 Apr;150(15):154114

Institute of Atomic and Molecular Physics, Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, People's Republic of China.

Spin-orbit coupling (SOC) may have a significant effect on the structure and harmonic frequencies of particularly heavy p-block element compounds. However, reports on analytical energy gradients with SOC are scarce, especially for excited states. In this work, we implemented analytical energy gradients for ionized states using the equation-of-motion coupled-cluster (CC) theory at the CC singles and doubles level (EOM-IP-CCSD) with SOC. Read More

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http://dx.doi.org/10.1063/1.5088639DOI Listing

Strongly correlated oxides for energy harvesting.

Sci Technol Adv Mater 2018 26;19(1):899-908. Epub 2018 Nov 26.

Department of Physics, Waseda University, Tokyo, Japan.

We review recent advances in strongly correlated oxides as thermoelectric materials in pursuit of energy harvesting. We discuss two topics: one is the enhancement of the ordinary thermoelectric properties by controlling orbital degrees of freedom and orbital fluctuation not only in bulk but also at the interface of correlated oxides. The other topic is the use of new phenomena driven by spin-orbit coupling (SOC) of materials. Read More

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https://www.tandfonline.com/doi/full/10.1080/14686996.2018.1
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http://dx.doi.org/10.1080/14686996.2018.1529524DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6454405PMC
November 2018
1 Read

Alternative paths to realize Majorana Fermions in Superconductor-Ferromagnet Heterostructures.

Sci Rep 2019 Apr 18;9(1):6259. Epub 2019 Apr 18.

Department of Physics, National Technical University of Athens, GR-15780, Athens, Greece.

A fundamental obstacle for achieving quantum computation is local decoherence. One way to circumvent this problem rests on the concepts of topological quantum computation using non-local information storage, for example on pairs of Majorana fermions (MFs). The arguably most promising way to generate MFs relies at present on spin-triplet p-wave states of superconductors (SC), which are not abundant in nature, unfortunately. Read More

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http://dx.doi.org/10.1038/s41598-019-42558-3DOI Listing

Exact decomposition of homoclinic orbit actions in chaotic systems: Information reduction.

Phys Rev E 2019 Mar;99(3-1):032212

Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.

Homoclinic and heteroclinic orbits provide a skeleton of the full dynamics of a chaotic dynamical system and are the foundation of semiclassical sums for quantum wave packets, coherent states, and transport quantities. Here, the homoclinic orbits are organized according to the complexity of their phase-space excursions, and exact relations are derived expressing the relative classical actions of complicated orbits as linear combinations of those with simpler excursions plus phase-space cell areas bounded by stable and unstable manifolds. The total number of homoclinic orbits increases exponentially with excursion complexity, and the corresponding cell areas decrease exponentially in size as well. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.99.032212
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http://dx.doi.org/10.1103/PhysRevE.99.032212DOI Listing
March 2019
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[Benign Neoplasms of the Orbit].

Klin Monbl Augenheilkd 2019 Apr 18. Epub 2019 Apr 18.

Benign orbital neoplasms comprise a wide spectrum of different entities. The origin of the tumours can be epithelial or mesenchymal. Epithelial neoplasms of the orbit originate from the lacrimal gland. Read More

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http://dx.doi.org/10.1055/a-0885-2402DOI Listing

Comparative Experimental and Theoretical Study of the Fe L-Edges X-ray Absorption Spectroscopy in Three Highly Popular, Low-Spin Organoiron Complexes: [Fe(CO)], [(η-CH)Fe(CO)(μ-CO)], and [(η-CH)Fe].

Inorg Chem 2019 Apr 18. Epub 2019 Apr 18.

Dipartimento di Scienze Chimiche , Università degli Studi di Padova , Via Francesco Marzolo 1 , 35131 Padova , Italy.

The occupied and unoccupied electronic structures of three highly popular, closed shell organoiron complexes ([Fe(CO)], [(η-CH)Fe(CO)(μ-CO)], and [(η-CH)Fe]) have been theoretically investigated by taking advantage of density functional theory (DFT) calculations coupled to the isolobal analogy ( Elian et al. Inorg. Chem. Read More

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http://pubs.acs.org/doi/10.1021/acs.inorgchem.9b00226
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http://dx.doi.org/10.1021/acs.inorgchem.9b00226DOI Listing
April 2019
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Magnetic Resonance Imaging in 14 Patients with Congenital Oculomotor Nerve Palsy.

Clin Neuroradiol 2019 Apr 17. Epub 2019 Apr 17.

Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (Republic of).

Purpose: To elucidate the imaging findings of congenital oculomotor nerve palsy by evaluating the oculomotor nerve and extraocular muscles on magnetic resonance (MR) imaging in a relatively large series of 14 patients with congenital oculomotor nerve palsy.

Methods: Ophthalmologic examination of 14 consecutive patients diagnosed with congenital oculomotor nerve palsy, and MR imaging of the orbit and oculomotor nerves were performed.

Results: Of the 14 patients with congenital oculomotor nerve palsy, 13 patients (93%) were unilateral and 12 patients (86%) had incomplete palsy. Read More

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http://link.springer.com/10.1007/s00062-019-00781-5
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http://dx.doi.org/10.1007/s00062-019-00781-5DOI Listing
April 2019
2 Reads

Computer-Aided Design of Luminescent Linear N-Heterocyclic Carbene Copper(I) Pyridine Complexes.

Inorg Chem 2019 Apr 17. Epub 2019 Apr 17.

Faculty of Chemistry and Chemical Biology , TU Dortmund University , Otto-Hahn-Strasse 6 , D-44227 Dortmund , Germany.

Multireference configuration interaction methods including spin-orbit interactions have been employed to investigate the photophysical properties of various linear N-heterocyclic carbene (NHC) copper(I) pyridine complexes with the aim of designing performant thermally activated delayed fluorescence (TADF) emitters for use in organic-light-emitting diodes. Our theoretical results indicate that this structural motif is very favorable for generating excited triplet states with high quantum yield. The first excited singlet (S) and corresponding triplet state (T) are characterized by d → π metal-to-ligand charge-transfer (MLCT) excitations. Read More

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http://pubs.acs.org/doi/10.1021/acs.inorgchem.9b00334
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http://dx.doi.org/10.1021/acs.inorgchem.9b00334DOI Listing
April 2019
2 Reads

Effects of a Mindfulness-Based Intervention on Distress, Weight Gain, and Glucose Control for Pregnant Low-Income Women: A Quasi-Experimental Trial Using the ORBIT Model.

Int J Behav Med 2019 Apr 16. Epub 2019 Apr 16.

Center for Health and Community, University of California, San Francisco, 3333 California St, San Francisco, CA, 94143, USA.

Background: Stress can lead to excessive weight gain. Mindfulness-based stress reduction that incorporates mindful eating shows promise for reducing stress, overeating, and improving glucose control. No interventions have tested mindfulness training with a focus on healthy eating and weight gain during pregnancy, a period of common excessive weight gain. Read More

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http://dx.doi.org/10.1007/s12529-019-09779-2DOI Listing
April 2019
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Topological Dirac states in transition-metal monolayers on graphyne.

Phys Chem Chem Phys 2019 Apr 17. Epub 2019 Apr 17.

Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.

Realizing topological Dirac states in two-dimensional (2D) magnetic materials is particularly important to spintronics. Here, we propose that such states can be obtained in a transition-metal (Hf) monolayer grown on a 2D substrate with hexagonal hollow geometry (graphyne). We find that the significant orbital hybridizations between Hf and C atoms can induce sizable magnetism and bring three Dirac cones at/around each high-symmetry K(K') point in the Brillouin zone. Read More

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http://xlink.rsc.org/?DOI=C9CP01153F
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http://dx.doi.org/10.1039/c9cp01153fDOI Listing
April 2019
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NUT midline carcinoma in the right orbit: a case report.

Cancer Biol Ther 2019 Apr 16:1-6. Epub 2019 Apr 16.

a Department of Oncology , Shanghai Yangpu District Shidong Hospital , Shanghai , P.R.China.

Nuclear protein in testis (NUT) midline carcinoma (NMC) is a rare malignant tumor defined by a unique chromosomal translocation of the NUT gene on chromosome 15q14. This very rare tumor is usually located in midline structures, especially in the head and neck region. However, there have been no previous reports of NMC arising from the eyes. Read More

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https://www.tandfonline.com/doi/full/10.1080/15384047.2019.1
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http://dx.doi.org/10.1080/15384047.2019.1598761DOI Listing
April 2019
5 Reads

Magnetic properties of the BaNi2(As1-xVx)2O8 honeycomb system.

J Phys Condens Matter 2019 Apr 16. Epub 2019 Apr 16.

Princeton University, Princeton, New Jersey, UNITED STATES.

The Kitaev model for magnetic interactions on a honeycomb lattice, which underlies the exotic quantum spin liquid (QSL) state in such systems, has long been established and experimentally confirmed. Current studies on Kitaev QSLs have focused on heavy-metal-based Mott insulators where strong spin-orbit coupling (SOC) leads to bond-dependent spin anisotropy. Here we examine a 3d transition-metal-based honeycomb lattice material BaNi2(As1-xVx)2O8, where the SOC is weak but spin exchange coupling is strongly frustrated due to the crystal field. Read More

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http://dx.doi.org/10.1088/1361-648X/ab1a12DOI Listing
April 2019
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Quality-based pharmacokinetic model selection on DCE-MRI for characterizing orbital lesions.

J Magn Reson Imaging 2019 Apr 15. Epub 2019 Apr 15.

Université Paris Descartes Sorbonne Paris Cité, INSERM UMR-S970, Cardiovascular Research Center - PARCC, Paris, France.

Background: Although several studies have evaluated dynamic contrast-enhanced (DCE) MRI in the orbit, showing its utility when detecting and diagnosing orbital lesions, none have evaluated the pharmacokinetic models.

Purpose: To provide a quality-based pharmacokinetic model selection for characterizing orbital lesions using DCE-MRI at 3.0T. Read More

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http://dx.doi.org/10.1002/jmri.26747DOI Listing
April 2019
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Artificial Neuron and Synapse Realized in an Antiferromagnet/Ferromagnet Heterostructure Using Dynamics of Spin-Orbit Torque Switching.

Adv Mater 2019 Apr 16:e1900636. Epub 2019 Apr 16.

Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.

Efficient information processing in the human brain is achieved by dynamics of neurons and synapses, motivating effective implementation of artificial spiking neural networks. Here, the dynamics of spin-orbit torque switching in antiferromagnet/ferromagnet heterostructures is studied to show the capability of the material system to form artificial neurons and synapses for asynchronous spiking neural networks. The magnetization switching, driven by a single current pulse or trains of pulses, is examined as a function of the pulse width (1 s to 1 ns), amplitude, number, and pulse-to-pulse interval. Read More

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http://dx.doi.org/10.1002/adma.201900636DOI Listing

The Instrument Design of the DLR Earth Sensing Imaging Spectrometer (DESIS).

Sensors (Basel) 2019 Apr 4;19(7). Epub 2019 Apr 4.

Institute of Optical Sensor Systems, DLR, Rutherfordstraße 2, 12489 Berlin, Germany.

Whether for identification and characterization of materials or for monitoring of the environment, space-based hyperspectral instruments are very useful. Hyperspectral instruments measure several dozens up to hundreds of spectral bands. These data help to reconstruct the spectral properties like reflectance or emission of Earth surface or the absorption of the atmosphere, and to identify constituents on land, water, and in the atmosphere. Read More

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https://www.mdpi.com/1424-8220/19/7/1622
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http://dx.doi.org/10.3390/s19071622DOI Listing
April 2019
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Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field.

iScience 2019 Apr 3;14:257-263. Epub 2019 Apr 3.

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China. Electronic address:

We show that an imaginary magnetic field (IMF), which can be generated in non-Hermitian systems with spin-dependent dissipations, can greatly enhance the s-wave pairing and superfluidity of spin-1/2 fermions, in distinct contrast to the effect of a real magnetic field. The enhancement can be attributed to the increased coupling constant in low-energy space and the reduced spin gap in forming singlet pairs. We have demonstrated this effect in a number of different fermion systems with and without spin-orbit coupling, using both the two-body exact solution and many-body mean-field theory. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S25890042193009
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http://dx.doi.org/10.1016/j.isci.2019.03.031DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463221PMC
April 2019
3 Reads

Quantum Behavior of Spin-Orbit Inelastic Scattering of C-Atoms by D at Low Energy.

Front Chem 2019 28;7:164. Epub 2019 Mar 28.

LOMC - UMR 6294, CNRS-Université du Havre, Le Havre, France.

Fine-structure populations and collision-induced energy transfer in atoms are of interest for many fields, from combustion to astrophysics. In particular, neutral carbon atoms are known to play a role in interstellar media, either as probes of physical conditions (ground state P spin-orbit populations), or as cooling agent (collisional excitation followed by radiative decay). This work aims at investigating the spin-orbit excitation of atomic carbon in its ground electronic state due to collisions with molecular deuterium, an isotopic variant of H, the most abundant molecule in the interstellar medium. Read More

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http://dx.doi.org/10.3389/fchem.2019.00164DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6448599PMC

Advancement flap for anterior lamellar reconstruction of the upper eyelid.

GMS Ophthalmol Cases 2019 19;9:Doc08. Epub 2019 Mar 19.

Oculoplastic and Orbit Service, Eye Center Specialized Ophthalmology, Valera (Trujillo), Venezuela.

A patient with an upper eyelid defect following oncological resection is presented. The defect was reconstructed using an advancement of local flap to provide tissue similar to native tissue, addressing both aesthetic and functional aspects. Read More

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http://dx.doi.org/10.3205/oc000097DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6435999PMC
March 2019
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Large Tunneling Magnetoresistance in VSe/MoS Magnetic Tunnel Junction.

ACS Appl Mater Interfaces 2019 Apr 23. Epub 2019 Apr 23.

Fert Beijing Institute, BDBC, School of Microelectronics , Beihang University , Beijing 100191 , China.

Two-dimensional (2D) van der Waals (vdW) materials provide the possibility of realizing heterostructures with coveted properties. Here, we report a theoretical investigation of the vdW magnetic tunnel junction (MTJ) based on VSe/MoS heterojunction, where the VSe monolayer acts as a ferromagnet with room-temperature ferromagnetism. We propose the concept of spin-orbit torque (SOT) vdW MTJ with reliable reading and efficient writing operations. Read More

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http://pubs.acs.org/doi/10.1021/acsami.9b02493
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http://dx.doi.org/10.1021/acsami.9b02493DOI Listing
April 2019
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The impact of frailty on perioperative outcomes and resource utilization in sinonasal cancer surgery.

Laryngoscope 2019 Apr 14. Epub 2019 Apr 14.

Department of Head and Neck Surgery, David Geffen School of Medicine at the University of California-Los Angeles, Los Angeles, California.

Objectives/hypothesis: Frailty is a measure of decreased physiologic reserve that has been associated with adverse outcomes in older surgical patients. We aimed to measure the association of preoperative frailty with outcomes in patients undergoing sinonasal cancer surgery.

Study Design: Retrospective cohort study. Read More

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http://dx.doi.org/10.1002/lary.28006DOI Listing

Direct stenting in patients treated with orbital atherectomy: An ORBIT II subanalysis.

Cardiovasc Revasc Med 2019 Mar 21. Epub 2019 Mar 21.

Metropolitan Heart and Vascular Institute, The Heart Center, Suite 120, 4040 Coon Rapids Boulevard, Minneapolis, MN 55433, USA.

Background: Direct stenting offers many potential advantages in appropriately selected lesions. Coronary artery calcification increases the complexity and risk of adverse events associated with percutaneous coronary intervention. This study aimed to examine the feasibility of direct stenting after treatment with orbital atherectomy (OA). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S15538389193017
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http://dx.doi.org/10.1016/j.carrev.2019.03.011DOI Listing
March 2019
3 Reads

Ophthalmologic aspects of Dermatofibrosarcoma Protuberans: A systematic review in the context of a rare case of primary orbital involvement.

J Fr Ophtalmol 2019 Apr 10. Epub 2019 Apr 10.

Department of ophthalmology, Feiz hospital, Isfahan university of medical sciences, Isfahan, Iran; Isfahan eye research center (IERC), Feiz hospital, Isfahan university of medical sciences, Isfahan, Iran; Isfahan medical students research center (IMSRC), Isfahan university of medical sciences, Isfahan, Iran. Electronic address:

Objective: To provide a systematic review on ophthalmologic presentations of dermatofibrosarcoma protuberans (DFSP) in conjunction with a case report of primary orbital involvement by this tumor.

Methods: A thorough electronic search on PubMed, Medline, Scopus, EMBASE and web of science databases was performed. All available data from reported cases along with our described case were extracted and analyzed. Read More

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http://dx.doi.org/10.1016/j.jfo.2018.11.012DOI Listing

Pseudocontact shifts and paramagnetic susceptibility in semiempirical and quantum chemistry theories.

J Chem Phys 2019 Apr;150(14):144101

Magnetic Resonance Center (CERM) and Interuniversity Consortium for Magnetic Resonance of Metallo Proteins (CIRMMP), Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Italy.

Pseudocontact shifts are traditionally described as a function of the anisotropy of the paramagnetic susceptibility tensor, according to the semiempirical theory mainly developed by Kurland and McGarvey [J. Magn. Reson. Read More

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http://dx.doi.org/10.1063/1.5037428DOI Listing
April 2019
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Predissociation dynamics of D + hv→ D(1s) + D(2p, 2s) revealed by the spin-orbit state resolved fragment branching ratios and angular distributions.

Authors:
Jie Wang Yuxiang Mo

J Chem Phys 2019 Apr;150(14):144306

Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China.

For molecular photodissociations, the spin-orbit state resolved fragment branching ratios and angular distributions provide deep insight into the dynamics. For the first excited state of the H(2p) atom, a branching ratio measurement is a challenge because of small energy spacing between them. For the D(2p) fragments from the predissociation of D + 14. Read More

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http://dx.doi.org/10.1063/1.5087865DOI Listing

Light Emission Enhancement by Tuning the Structural Phase of APbBr (A = CHNH, Cs) Perovskites.

J Phys Chem Lett 2019 Apr 17:2135-2142. Epub 2019 Apr 17.

Department of Chemistry , Yonsei University , Seoul 03722 , Korea.

Lead halide perovskite (APbX) has recently emerged as a promising active layer in light-emitting diodes (LEDs) as well as an absorber for photovoltaic devices. For better LED properties, it is important to understand the fundamental mechanism of the optoelectronic behaviors, e.g. Read More

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http://pubs.acs.org/doi/10.1021/acs.jpclett.9b00829
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http://dx.doi.org/10.1021/acs.jpclett.9b00829DOI Listing
April 2019
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Imaging Spectrum of Cavernous Sinus Lesions with Histopathologic Correlation.

Radiographics 2019 Apr 12:180122. Epub 2019 Apr 12.

From the Departments of Radiology (H.V.M., S.E.M.), Pathology (B.P., G.C.), Neurosurgery (K.P.), and Neurology (M.A.), Christian Medical College, Ida Scudder Road, Vellore, Tamil Nadu 632004, India; and the Department of Radiology, NYU Langone Medical Center, New York, NY (G.M.F.).

Cavernous sinuses are paired interconnected venous plexuses situated in the floor of the middle cranial fossa on either side of the sella turcica and sphenoid sinus. They are lined by dura mater and consist of multiple venous channels within. The cavernous sinuses are intimately related to the internal carotid artery and its associated sympathetic plexus, the oculomotor nerve, the trochlear nerve, the abducens nerve, and the ophthalmic nerve. Read More

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http://dx.doi.org/10.1148/rg.2019180122DOI Listing