Read by QxMD icon Read


Hong Ki Min, Youn Soo Lee, Suk-Woo Yang, Jennifer Lee, Seung-Ki Kwok, Ji Hyeon Ju, Wan-Uk Kim, Sung-Hwan Park
Background/Aims: This study investigated the clinical and pathological features of immunoglobulin G4 (IgG4)-related ophthalmic disease. To clarify the features, we compared IgG4-related ophthalmic disease and orbital inflammatory pseudotumor. Methods: We retrospectively reviewed the medical records of 103 patients who were initially diagnosed with orbital inflammatory pseudotumor, and identified 16 cases in which the diagnosis was based on surgical biopsy and for which data in medical records were sufficient for analysis...
October 19, 2017: Korean Journal of Internal Medicine
Jun Zhou, Jiying Zhong, Sen Lin, Zhenxing Huang, Hongtao Chen, Simin Tang, Chengxiang Yang, Youling Fan
BACKGROUND: Renal fibrosis is a common pathophysiological feature of chronic kidney disease. Acute kidney injury (AKI) is defined as an independent causal factor of chronic kidney disease, with a pathological representation of post renal fibrosis. However, the etiopathogenesis underlying post renal fibrosis induced by AKI is not completely understood. METHODS: BALB/c mice were treated with bpv or vehicle controls and were, respectively, the ischemia reperfusion (IR) model group and control group...
October 19, 2017: Cellular Physiology and Biochemistry
Wenrong Cheng, Guoqin Wang, Min Yang, Lijun Sun, Hongrui Dong, Yipu Chen, Hong Cheng
RATIONALE: Mucormycosis is a rare fungal infection but life-threatening, especially in lupus nephritis (LN). Mucormycosis may manifest as rhino-orbital-cerebral, pulmonary, cutaneous, gastrointestinal, renal, or disseminated forms. PATIENT CONCERNS: We report a case of a 52-year-old woman with cutaneous mucormycosis infection who was admitted because of LN. DIAGNOSES: Histopathological analysis of the lesion confirmed the Rhizopus microspores from the family Mucoraceae...
October 2017: Medicine (Baltimore)
Farzad Pakdel, Niloofar Pirmarzdashti, Sasan Soltani, Zohreh Nozarian, Fahimeh Asadi Amoli, Abolfazl Kassaee
The authors aim to report a 68-year-old patient presenting with acute swelling and redness of orbital area diagnosed initially as orbital cellulitis. Surgical excision was decided based on clinical and imaging findings with the diagnosis of pleomorphic adenoma of the lacrimal gland. Lacrimal gland pleomorphic adenoma usually presents with painless gradual swelling of upper eyelid. In an exceptionally rare circumstance, this case showed acute orbital inflammation, and imaging findings of orbital inflammation mostly focused around the cystic space of the lacrimal gland tumor...
October 14, 2017: Ophthalmic Plastic and Reconstructive Surgery
S A Owerre, J Nsofini
Quantum information storage using charge-neutral quasiparticles is expected to play a crucial role in the future of quantum computers. In this regard, magnons or collective spin-wave excitations in solid-state materials are promising candidates in the future of quantum computing. Here, we study the quantum squeezing of Dirac and topological magnons in a bosonic honeycomb optical lattice with spin-orbit interaction by utilizing the mapping to quantum spin-[Formula: see text] XYZ Heisenberg model on the honeycomb lattice with discrete Z2 symmetry and a Dzyaloshinskii-Moriya interaction...
October 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
J P Sun, Y Y Jiao, C L Yang, W Wu, C J Yi, B S Wang, Y G Shi, J L Luo, Y Uwatoko, J-G Cheng
K2Cr3As3 is a newly discovered quasi-1D superconductor with a T c  =  6.1 K and an upper critical field µ 0 H c2(0)  ≈  40 T three times larger than the Pauli paramagnetic limit µ 0 H p that is suggestive of a spin-triplet Cooper pairing. In this paper, we have investigated the effects of hydrostatic pressure on its T c and µ 0 H c2 by measuring the ac magnetic susceptibility χ'(T) under magnetic fields at various hydrostatic pressures up to 7.5 GPa. The major findings include: (1) T c is suppressed gradually to below 2 K at 7...
October 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Reenu Elizabeth John, Anoop Chandran, Justin George, Ajai Jose, Gijo Jose, Joshy Jose, N V Unnikrishnan, Marykutty Thomas, K C George
Nanostructuring followed by incorporation of defect induced non-stoichiometry is an emerging field of prominence due to its capacity to introduce unprecedented properties in materials with potential applications. In this work, crystalline α-MnO2 nanorods are synthesised using a facile co-precipitation method to exhibit ferroelectric behaviour for the first time. The evolution mechanism of the nanorods is investigated using XRD, HRTEM and FTIR spectra, while their thermal stability is probed using TGA/DTA. The novel properties observed are the result of structural rearrangements sparked by electrons in mixed valence cations (Mn(3+)/Mn(4+))...
October 19, 2017: Physical Chemistry Chemical Physics: PCCP
Yuean Mi, Haisu Li, Guobin Ren
We propose a vector mode conversion approach based on asymmetric fiber Bragg gratings (AFBGs) written in step-index fiber and vortex fiber, respectively. The mode coupling properties of AFBGs are numerically investigated. Compared to step-index fiber, the large mode separation in the vortex fiber is beneficial to extracting the desired vector mode at specific wavelengths. In addition, the polarization of incident light and the attenuation coefficient of index change distribution of the AFBG play critical roles in the mode coupling process...
September 1, 2017: Applied Optics
Aoi Takahashi, Keigo Enya, Kanae Haze, Hirokazu Kataza, Takayuki Kotani, Hideo Matsuhara, Tomohiro Kamiya, Tomoyasu Yamamuro, Paul Bierden, Steven Cornelissen, Charlie Lam, Michael Feinberg
This paper demonstrates a cryogenic deformable mirror (DM) with 1020 actuators based on micro-electrical mechanical systems (MEMS) technology. Cryogenic space-borne infrared telescopes can experience a wavefront error due to a figure error of their mirror surface, which makes the imaging performance worse. For on-orbit wavefront correction as one solution, we developed a MEMS-processed electro-static DM with a special surrounding structure for use under the cryogenic temperature. We conducted a laboratory demonstration of its operation in three cooling cycles between 5 K and 295 K...
August 10, 2017: Applied Optics
Geng Wang, Fei Xing, Minsong Wei, Ting Sun, Zheng You
Star trackers, optical attitude sensors with high precision, are susceptible to space light from the Sun and the Earth albedo. Until now, research in this field has lacked systematic analysis. In this paper, we propose an installation orientation method for a star tracker onboard sun-synchronous-orbit spacecraft and analyze the space light distribution by transforming the complicated relative motion among the Sun, Earth, and the satellite to the body coordinate system of the satellite. Meanwhile, the boundary-curve equations of the areas exposed to the stray light from the Sun and the Earth albedo were calculated by the coordinate-transformation matrix under different maneuver attitudes, and the installation orientation of the star tracker was optimized based on the boundary equations instead of the traditional iterative simulation method...
May 20, 2017: Applied Optics
Junqiang Sun, Menghua Wang
An enhanced methodology of the standard on-orbit calibration of the day-night band (DNB) of the visible infrared imaging radiometer suite on board the Suomi National Polar-orbiting Partnership satellite is presented, specifically for the low-gain stage. The range of the "sweet spot" for the fully illuminated scans in the calibration events is expanded from 4° to 7.8° in order to increase the number of fully illuminated scans to 72, which then permits a complete calibration of the DNB to be carried out within one orbit for all 36 aggregated modes and the two mirror sides...
May 20, 2017: Applied Optics
Hang Du, Ci Song, Shengyi Li, Mingjin Xu, Xiaoqiang Peng
In the process of computer controlled optical surfacing (CCOS), the uncontrollable rolled edge restricts further improvements of the machining accuracy and efficiency. Two reasons are responsible for the rolled edge problem during small tool polishing. One is that the edge areas cannot be processed because of the orbit movement. The other is that changing the tool influence function (TIF) is difficult to compensate for in algorithms, since pressure step appears in the local pressure distribution at the surface edge...
May 20, 2017: Applied Optics
D O Pabon, S A Ledesma, G F Quinteiro, M G Capeluto
We present a compact design to generate and test optical-vortex beams with possible applications in the extreme ultraviolet (EUV) region of the electromagnetic spectrum. The device consists of a diffractive mask where both the beam with orbital angular momentum and the reference wavefront to test its phase are generated. In order to show that the proposal would work in the EUV, simulations and proof-of-principle experiments were performed, using typical parameters for EUV holography scaled to visible wavelengths...
October 10, 2017: Applied Optics
Ruishan Chen, Xiaoqiang Zhang, Yong Zhou, Hai Ming, Anting Wang, Qiwen Zhan
We demonstrate a new method to detect the vortex beams carrying orbital angular momentum by a sectorial screen. When the sectorial screen is illuminated by optical vortex beams, the far-field diffraction pattern can be used to visually determine the modulus and sign of topological charges. We also prove that center alignment is not strictly required. The experimental results agree well with the simulated results.
June 1, 2017: Applied Optics
D E Jennings, F M Flasar, V G Kunde, C A Nixon, M E Segura, P N Romani, N Gorius, S Albright, J C Brasunas, R C Carlson, A A Mamoutkine, E Guandique, M S Kaelberer, S Aslam, R K Achterberg, G L Bjoraker, C M Anderson, V Cottini, J C Pearl, M D Smith, B E Hesman, R D Barney, S Calcutt, T J Vellacott, L J Spilker, S G Edgington, S M Brooks, P Ade, P J Schinder, A Coustenis, R Courtin, G Michel, R Fettig, S Pilorz, C Ferrari
The Cassini spacecraft orbiting Saturn carries the composite infrared spectrometer (CIRS) designed to study thermal emission from Saturn and its rings and moons. CIRS, a Fourier transform spectrometer, is an indispensable part of the payload providing unique measurements and important synergies with the other instruments. It takes full advantage of Cassini's 13-year-long mission and surpasses the capabilities of previous spectrometers on Voyager 1 and 2. The instrument, consisting of two interferometers sharing a telescope and a scan mechanism, covers over a factor of 100 in wavelength in the mid and far infrared...
June 20, 2017: Applied Optics
Arpita Varadwaj, Pradeep R Varadwaj, Koichi Yamashita
Methylammonium lead iodide (CH3 NH3 PbI3 ) perovskite compound has produced a remarkable breakthrough in the photovoltaic history of solar cell technology because of its outstanding device-based performance as a light-harvesting semiconductor. Whereas the experimental and theoretical studies of this system in the solid state have been numerously reported in the last 4 years, its fundamental cluster physics is yet to be exploited. To this end, this study has performed theoretical investigations using DFT-M06-2X/ADZP to examine the principal geometrical, electronic, topological, and orbital properties of the CH3 NH3 PbI3 molecular building block...
October 18, 2017: Journal of Computational Chemistry
Yao-Dong Song, Liang Wang, Li-Ming Wu
A series of Li-corannulene-(NH2)n and Li-corannulene-(NO2)n (n = 1, 2, 5) compounds have been theoretically designed and investigated using density functional theory. In this work, two models are systematically investigated to explore the important factors for enhancing the static first hyperpolarizability by introducing the substitution group. It is revealed that energy gaps (Egap) between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of all compounds are in the range of 4...
October 19, 2017: Journal of Molecular Modeling
Guichao Hu, Shijie Xie, Chuankui Wang, Carsten Timm
Organic ferromagnets are intriguing materials in that they combine ferromagnetic and organic properties. Although challenges in their synthesis still remain, the development of organic spintronics has triggered strong interest in high-performance organic ferromagnetic devices. This review first introduces our theory for spin-dependent electron transport through organic ferromagnetic devices, which combines an extended Su-Schrieffer-Heeger model with the Green's function method. The effects of the intrinsic interactions in the organic ferromagnets, including strong electron-lattice interaction and spin-spin correlation between π-electrons and radicals, are highlighted...
2017: Beilstein Journal of Nanotechnology
Eric Friedman, Brian Bui
Behavioral health is essential for the safety, well-being, and performance of crewmembers in both human spaceflight and Antarctic exploration. Over the past five decades, psychiatric issues have been documented in orbital spaceflight. In Antarctica, literature suggests up to 5% of wintering crewmembers could meet criteria for a psychiatric illness, including mood disorders, stressor-related disorders, sleep-wake disorders, and substance-related disorders. Experience from these settings indicates that psychiatric disorders on deep space missions must be anticipated...
November 1, 2017: Aerospace Medicine and Human Performance
S Q Wang, Z X Yang, H Li
To explore the clinical and genetic characteristics of Williams-Beuren syndrome (WBS) and to raise awareness of the disease. The characteristics of clinical manifestations, personal history, cardiac ultrasound, brain magnetic resonance imaging (MRI), electroencephalogram (EEG) and chromosome detection results of two cases with WBS were analyzed. The two patients were both male and the age was 11 months and 1 day, and 9 months and 9 days, respectively. They both suffered from cardiovascular malformation: case one presented supravalvular aortic stenosis, and case two showed atrial septal defect and patent ductus arteriosus...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"