Results 21 to 30 of about 254,988 (247)

Alvarez varifocal X-ray lens

Nature Communications, 2023
Visible light optical elements such as lenses and mirrors have counterparts for X-rays. In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refractors with a cubic thickness ...
Vishal Dhamgaye, David Laundy, Hossein Khosroabadi, Thomas Moxham, Sara Baldock, Oliver Fox, Kawal Sawhney   +6 more
doaj   +1 more source

NV– diamond laser [PDF]

Nature Communications, 2021
AbstractFor the first time, lasing at NV−centers in an optically pumped diamond sample is achieved. A nanosecond train of 150-ps 532-nm laser pulses was used to pump the sample. The lasing pulses have central wavelength at 720 nm with a spectrum width of 20 nm, 1-ns duration and total energy around 10 nJ.
Alexander Savvin, Alexander Dormidonov, Evgeniya Smetanina, Vladimir Mitrokhin, Evgeniy Lipatov, Dmitriy Genin, Sergey Potanin, Alexander Yelisseyev, Viktor Vins   +8 more
openaire   +5 more sources

Diamond dicing [PDF]

Data & Knowledge Engineering, 2013
29 ...
Webb, Hazel, Lemire, Daniel, Kaser, Owen
openaire   +2 more sources

Stress, Sleep and Psychological Impact in Healthcare Workers During the Early Phase of COVID-19 in India: A Factor Analysis

Frontiers in Psychology, 2021
Background: Risks to healthcare workers have escalated during the pandemic and they are likely to experience a greater level of stress. This cross-sectional study investigated mental distress among healthcare workers during the early phase of Coronavirus
Seshadri Sekhar Chatterjee, Madhushree Chakrabarty, Debanjan Banerjee, Sandeep Grover, Shiv Sekhar Chatterjee, Utpal Dan   +5 more
doaj   +1 more source

Hydrodynamic Forces on a Submerged Horizontal Circular Cylinder in Uniform Finite Depth Ice Covered Water

International Journal of Applied Mechanics and Engineering, 2020
Hydrodynamic forces on a submerged cylinder in uniform finite depth ice-covered water is formulated by using the method of multipoles, the ice-cover being modelled as an elastic plate of very small thickness.
M. Sahu, D. Das
doaj   +1 more source

Diamond coating deposited on the inner wall of annular workpiece by rotating arc heating

Jin'gangshi yu moliao moju gongcheng, 2022
A plasma torch with split anode and rotating arc was developed. The diamond was coated on the inner wall of large diameter annular workpiece by the torch.
Guohua LI, Yuming CUI, Wang DONG, Long JIANG   +3 more
doaj   +1 more source

Diamond nanophotonics [PDF]

Beilstein Journal of Nanotechnology, 2012
We demonstrate the coupling of single color centers in diamond to plasmonic and dielectric photonic structures to realize novel nanophotonic devices. Nanometer spatial control in the creation of single color centers in diamond is achieved by implantation of nitrogen atoms through high-aspect-ratio channels in a mica mask.
Beha, Katja, Fedder, Helmut, Wolfer, Marco, Becker, Merle C., Siyushev, Petr, Jamali, Mohammad, Batalov, Anton, Hinz, Christopher, Hees, Jakob, Kirste, Lutz, Obloh, Harald, Gheeraert, Etienne, Naydenov, Boris, Jakobi, Ingmar, Dolde, Florian, Pezzagna, Sebastien, Twittchen, Daniel, Markham, Matthew, Dregely, Daniel, Giessen, Harald, Meijer, Jan, Jelezko, Fedor, Nebel, C. E., Bratschitsch, Rudolf, Leitenstorfer, Alfred, Wrachtrup, Joerg   +25 more
openaire   +5 more sources

CLINICAL EVALUATION OF OMICRON SUBVARIANT BA. 2- A HOSPITAL BASED STUDY

National Journal of Medical Research, 2023
Introduction- Omicron is subdivided into BA.1 and BA.2. BA.2 appears to be more transmissible by nature. The new BA.2 sub variant is 30% easier to spread than the original omicron variant.
Pratiti Datta, Reena Ray Ghosh, Niramoy Maji, Utpal Dan   +3 more
doaj   +1 more source

Effect of interface microstructure on properties of polycrystalline diamond composites

Jin'gangshi yu moliao moju gongcheng, 2022
The cemented carbide matrix and the preferred main crystal of 25 μm diamond particles as raw materials, the polycrystalline diamond composites (PDC) was prepared by domestic hinge-type cubic-anvil press at high temperature and high pressure (HPHT) under ...
Dongpeng ZHAO, Changjian GENG, Haijiang FANG   +2 more
doaj   +1 more source

A Novel Dual Air-Bearing Fixed-χ Diffractometer for Small-Molecule Single-Crystal X-ray Diffraction on Beamline I19 at Diamond Light Source

Crystals, 2017
Herein, we describe the development of a novel dual air-bearing fixed-χ diffractometer for beamline I19 at Diamond Light Source. The diffractometer is designed to facilitate the rapid data collections possible with a Dectris Pilatus 2M pixel-array photon-
David . R Allan, Harriott Nowell, Sarah A. Barnett, Mark R. Warren, Adrian Wilcox, Jeppe Christensen, Lucy K. Saunders, Andrew Peach, Mark T. Hooper, Ljubo Zaja, Suren Patel, Leo Cahill, Russell Marshall, Steven Trimnell, Andrew J. Foster, Trevor Bates, Simon Lay, Mark A. Williams, Paul V. Hathaway, Graeme Winter, Markus Gerstel, Ron W. Wooley   +21 more
doaj   +1 more source