Results 41 to 50 of about 79,322 (246)

The chromatic and clique numbers of random scaled sector graphs

Theoretical Computer Science, 2005
In the unit square, \(n\) random points are chosen that are independently and uniformly distributed. At each point a sector is drawn with radius depending on \(n\) and with a fixed angle different from 180 degrees. The directions of the sectors are given by independent uniformly distributed orientation angles.
Josep Díaz, Vishal Sanwalani, Maria J. Serna, Paul G. Spirakis   +3 more
openaire   +2 more sources

Aluminum Oxynitride‐Engineered Transparent Aluminum Nitride Resistive Memory for Low‐Leakage Multilevel Switching in Micro‐LED Pixels

Advanced Materials Technologies, EarlyView.
An AlON interfacial layer is engineered within an AlN switching layer to enable transparent RRAM with four stable resistance states. The device achieves low‐voltage multilevel switching and a high HRS, allowing precise grayscale modulation and preventing light leakage in micro‐LEDs operated at VDD = 2.7 V.
Sung Keun Choi, Ho Jin Lee, Seok Hee Hong, Jae Seong Park, Chan Ho Ryu, Kyeong Heon Kim, Tukaram D. Dongale, Tae Geun Kim   +7 more
wiley   +1 more source

Miniature optical planar camera based on a wide-angle metasurface doublet corrected for monochromatic aberrations

, 2016
Optical metasurfaces are two-dimensional arrays of nano-scatterers that modify optical wavefronts at subwavelength spatial resolution. They are poised to revolutionize optics by enabling complex low-cost systems where multiple metasurfaces are ...
Arbabi, Amir, Arbabi, Ehsan, Faraon, Andrei, Han, Seunghoon, Horie, Yu, Kamali, Seyedeh Mahsa   +5 more
core   +1 more source

Structure from motion systems for architectural heritage. A survey of the internal loggia courtyard of Palazzo dei Capitani, Ascoli Piceno, Italy [PDF]

, 2015
We present the results of a point-cloud-based survey deriving from the use of image-based techniques, in particular with multi-image monoscopic digital photogrammetry systems and software, the so-called “structure-from-motion” technique.
Ippoliti, Elena, Meschini, A., Sicuranza, F.   +2 more
core   +4 more sources

Spectrally Encoded Proximity‐Field Nanopatterning

Advanced Optical Materials, EarlyView.
Spectrally encoded proximity‐field nanopatterning (SEPN) enables continuous control of the out‐of‐plane periodicity of 3D photonic crystals by tuning the exposure wavelength while maintaining a fixed in‐plane period. This decouples near‐infrared reflectance from visible iridescence and allows fabrication of integrated multipattern devices with ...
Junhyung Park, Yun Hyeong, Hwanseok Chang, Dohyun Kim, Joonkyo Jung, Seokwoo Jeon, Jonghwa Shin   +6 more
wiley   +1 more source

Generation of bright phase-matched circularly-polarized extreme ultraviolet high harmonics [PDF]

, 2015
Circularly-polarized extreme ultraviolet and X-ray radiation is useful for analysing the structural, electronic and magnetic properties of materials. To date, such radiation has only been available at large-scale X-ray facilities such as synchrotrons ...
Cohen, Oren, Fleischer, Avner, Grychtol, Patrik, Kapteyn, Henry, Kfir, Ofer, Knut, Ronny, Murnane, Margaret, Nembach, Hans, Popmintchev, Dimitar, Popmintchev, Tenio, Shaw, Justin M, Turgut, Emrah, Zusin, Dmitriy   +12 more
core   +4 more sources

Multi‐Dielectric Metasurfaces for Ultrabright, Tunable Structural Color and Reconfigurable Optical Filtering with Extraordinarily Large Color Span

Advanced Optical Materials, EarlyView.
Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah, Yavuz Selim Aydın, Hilmi Volkan Demir   +2 more
wiley   +1 more source

A pan-chromatic view of the galaxy cluster XMMU J1230.3+1339 at z=0.975 - Observing the assembly of a massive system

, 2010
We present a comprehensive galaxy cluster study of XMMU J1230.3+1339 based on a joint analysis of X-ray data, optical imaging and spectroscopy observations, weak lensing results, and radio properties for achieving a detailed multi-component view of this ...
A. D. Schwope, A. de Hoon, A. Nastasi, Abell, Allen, Andreon, Arnaud, Arnaud, Arnaud, Beers, Bertin, Biviano, Blanton, Boylan-Kolchin, Bradač, Bremer, Briel, Brunetti, Brunetti, Brunetti, Bullock, Burns, Böhringer, Böhringer, Böhringer, Böhringer, Carlberg, Cassano, Cavaliere, Clowe, D. Pierini, Danese, De Luca, De Lucia, Demarco, Dolag, Dolag, Dunn, E. Rovilos, Eisenhardt, Erben, Ettori, Fassbender, Ferrari, Finn, Finoguenov, Fioc, Fujita, G. Chon, G. Lamer, G. W. Pratt, Girardi, Gladders, Guzzo, H. Böhringer, H. Quintana, Hicks, Huang, J. J. Mohr, J. Kohnert, J. S. Santos, Jee, Jee, Jee, Kodama, Koester, Koester, Kotov, Kravtsov, Kurk, Kurtz, Laing, Leauthaud, Lin, Lumb, M. Lerchster, M. Mühlegger, Markevitch, Markevitch, Marrone, Maughan, Mei, Meneghetti, Mullis, Muzzin, Nagai, Navarro, P. Rosati, Perlman, Pierre, Pivato, Popesso, Popesso, Pratt, Pratt, R. Fassbender, R. Šuhada, Reiprich, Reyes, Rosati, Rosati, Rovilos, S. Seitz, Sanderson, Santos, Santos, Sarazin, Scharf, Schwope, Shibata, Springel, Stanek, Stanford, Stanford, Staniszewski, Takizawa, Tanaka, Tanaka, Tozzi, van Breukelen, Vanderlinde, Vazza, Vikhlinin, Vikhlinin, Vikhlinin, Voit, White, Wilson, Zhang, Zibetti   +129 more
core   +1 more source

Aerosol Jet Printed Polymer‐Free High Aspect Ratio Quantum Dot Films for Enhanced Color Conversion

Advanced Optical Materials, EarlyView.
Polymer‐free quantum dot color conversion layers are aerosol jet printed at high aspect ratio by tuning the aerosol focus ratio to induce in‐flight droplet drying. Contact‐line pinning suppresses lateral spreading, enabling ∼10 µm‐thick films at ∼50 µm widths with blue light leakage below 0.25% and conversion efficiency approaching 18%, demonstrated ...
Sukyung Choi, Anna Meredith, Hyunsu Cho, Zahra Bahrami, Kevin Schnittker, Joseph Andrews   +5 more
wiley   +1 more source

Naphthyridine‐Based Donor–Acceptor Boron Difluoride Complexes Targeting Red Emission in Organic Light‐Emitting Diodes

Advanced Optical Materials, EarlyView.
Four donor–acceptor boron difluoride complexes based on triphenylamine donor and a naphthyridine acceptor units were synthesized, studied, and applied as OLED emitters. They exhibit pronounced intramolecular charge transfer character, balanced charge transport properties, and tunable emission. Near‐unity PLQYs are achieved for selected compounds, while
Omar Lahna, Stepan Kutsiy, Dmytro Volyniuk, Roman Luboradzki, Elina Andresen, Ute Resch‐Genger, Juozas V. Grazulevicius, Pavlo Stakhira, Mykhaylo A. Potopnyk   +8 more
wiley   +1 more source