Results 81 to 90 of about 49,381 (294)

Orbital variations and outbursts of the unusual variable star V1129 Centauri

, 2017
The variable star V1129 Cen is classified in the GCVS as being of $\beta$ Lyr type. Unusual for such stars, it exhibits outbursts roughly once a year, lasting for $\sim$40 days. For this reason, a relationship to the dwarf novae has been suspected. Here,
Bruch, Albert
core   +1 more source

Large‐Scale and Cost‐Effective Fabrication of Ultra‐Thin, Biodegradable Microelectrode Arrays and Pressure Sensors Using Laser Micromachining

Advanced Materials Technologies, EarlyView.
A mask‐free and cost‐effective UV‐pico‐second laser‐based microfabrication method is proposed to fabricate large‐area biodegradable microelectrode arrays and pressure sensors. These devices demonstrate low impedance, good conformability, excellent biocompatibility, and rapid degradation, providing a new route for next‐generation transient electronics ...
Bhavani Prasad Yalagala, Asfand Tanwear, María Cerezo‐Sánchez, Hossein Parvizi, Morteza Amjadi, Hadi Heidari   +5 more
wiley   +1 more source

Multiwavelength study of the pre-eruption dip in the recurrent nova T Coronae Borealis preceding imminent nova eruption

Astronomy & Astrophysics
We present a multiwavelength study of the symbiotic recurrent nova T Coronae Borealis (T CrB), using the Swift Burst Alert Telescope (BAT)/ X-Ray Telescope (XRT) / UltraViolet Optical Telescope (UVOT) and American Association of Variable Stars Observers (
Pei Songpeng, Zhang Xiaowan, Su Renzhi, Cai Yongzhi, Ou Ziwei, Li Qiang, Ren Xiaoqin, Yang Taozhi, Li Mingyue   +8 more
doaj   +1 more source

The Stony Brook / SMARTS Atlas of mostly Southern Novae

, 2012
We introduce the Stony Brook / SMARTS Atlas of (mostly) Southern Novae. This atlas contains both spectra and photometry obtained since 2003. The data archived in this atlas will facilitate systematic studies of the nova phenomenon and correlative studies
Andrew Battisti, Bode M. F., Bond H. E., Dworetsky M. M., Frederick M. Walter, Guy S. Stringfellow, Howard E. Bond, Hughes J. P., Hung L. W., Liller W., Liller W., McLaughlin D. B., Naik S., Nakano S., Patterson J., Payne-Gaposchkin C., Read A. M., Sarah E. Towers, Seach J., Silviero A., Smak J. I., Starrfield S., Walter F. M.   +22 more
core   +1 more source

Microstructured Electrode‐Piezopolymer Interface for Ultrasound Transducers With Enhanced Flexibility and Acoustic Performance

Advanced Materials Technologies, EarlyView.
Flexible piezopolymer ultrasound transducers are engineered by tailoring the electrode–piezopolymer interface using metallic, flake‐based, and porous graphene electrodes. Laser‐induced graphene's porous structure enables polymer infiltration, strengthening interfacial coupling and enhancing piezoelectric response and acoustic output.
Spencer Hagen, Dulcce A. Valenzuela, Parag V. Chitnis, Shirin Movaghgharnezhad   +3 more
wiley   +1 more source

The evolutionary history of ultra-compact accreting binaries

Astronomy & Astrophysics
Context. AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf primary accreting from a hydrogen-deficient donor.
Yu W., Pala A. F., Kupfer T., Gänsicke B. T., Koester D., Belloni D., Wong T. L. S., Schreiber M. R., van Roestel J., Brown A. J., Waagen E. O., González-Carballo J.-L., Bednarz S., Bernacki K., De Martino D., Fernández Mañanes E., González Farfán R., Green M. J., Groot P. J., Hambsch F.-J, Knigge C., Martin-Velasco J.-L., Morales-Aimar M., Myers G., Naves Nogues R., Poggiani R., Popowicz A., Ramsay G., Reina-Lorenz E., Rodríguez-Gil P., Salto-González J.-L., Sion E. M., Steeghs D., Szkody P., Toloza O., Tovmassian G.   +35 more
doaj   +1 more source

Novas tecnologias, novas sensibilidades

Comunicação & Educação, 2000
O artigo discute as mudanças na cultura contemporânea, advindas do processo de globalização, e como essas mudanças têm suscitado a discussão sobre as crises de identidade, principalmente aquelas calcadas no Estado nacional, evidenciando novas formas de se vivenciar a identidade de pertencimento a um território. Isso se dá ao mesmo tempo em que as novas
openaire   +4 more sources

On–Off Switchable Micromotors for Use in Steerable Microvehicles

Advanced Robotics Research, EarlyView.
Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson, Eswaran Murugasen, Jose G. Martinez, Edwin W. H. Jager   +3 more
wiley   +1 more source

Unveiling the white dwarf in the eclipsing polar HU Aquarii

Astronomy & Astrophysics
We present an analysis of high-speed u- and r-band photometry of the eclipsing polar HU Aqr that was obtained with ULTRACAM mounted on the VLT. The observations were performed during a low state, permitting us for the first time to determine the contact ...
Schwope A. D., Marsh T. R., Parsons S. G., Vogel J., Dhillon V. S.   +4 more
doaj   +1 more source

Symbiotic Nova PU Vul - 33 Years of Observations

Open Astronomy, 2012
We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days.
Shugarov S., Chochol D., Kolotilov E.
doaj   +1 more source