Results 101 to 110 of about 435,619 (292)

Spectral irradiance curve calculations for any type of solar eclipse [PDF]

A simple procedure is described for calculating the eclipse function (EF), alpha, and hence the spectral irradiance curve (SIC), (1-alpha), for any type of solar eclipse: namely, the occultation (partial/total) eclipse and the transit (partial/annular ...
Deepak, A., Merrill, J. E.
core   +1 more source

The GROUSE project II: Detection of the Ks-band secondary eclipse of exoplanet HAT-P-1b

, 2011
Context: Only recently it has become possible to measure the thermal emission from hot-Jupiters at near-Infrared wavelengths using ground-based telescopes, by secondary eclipse observations. This allows the planet flux to be probed around the peak of its
Acosta-Pulido, Alonso, Anderson, Bakos, Burrows, Charbonneau, Croll, Croll, Croll, de Mooij, Deming, E. J. W. de Mooij, Fortney, Fressin, Gibson, Gillon, Gillon, Grinspoon, Hubeny, I. A. G. Snellen, Johnson, Knutson, Knutson, Lacis, López-Morales, Machalek, Madhusudhan, Mandel, R. J. de Kok, Rogers, Rothman, Rothman, S. V. Nefs, Sing, Spiegel, Todorov, Wauben, Winn   +37 more
core   +1 more source

All‐Aqueous Pullulan Fibers Enabling Visible‐to‐Near‐Infrared Waveguiding with Mechanical and Thermal Resilience

Advanced Functional Materials, EarlyView.
Pullulan, a biomass‐derived polysaccharide, is transformed into transparent optical fibers using a solvent‐free borax hydrogel‐spinning method. The fibers outperform PMMA with ≈200 MPa tensile strength and 200 °C stability, while uniquely guiding visible‐to‐NIR light and enabling additive‐free humidity sensing.
Yuya Fukata, Aayush Kumar Jaiswal, Ari Hokkanen, Hannes Orelma, Tadahisa Iwata   +4 more
wiley   +1 more source

Detecting changes in along-path HF propagation during the April 2024 total solar eclipse with radio amateurs and low-cost instrumentation

Frontiers in Astronomy and Space Sciences
The total solar eclipse of April 8, 2024 presented a uniquely favorable circumstance for radio science. The Moon’s shadow passed near Canadian time standard station CHU, which transmits in the high frequency (HF, i.e., 3–30 MHz) band.
Maris Usis, Adam Goodman, Laura Schwartz, Laura Schwartz, David Kazdan, Kristina Collins, Kristina Collins, John Gibbons, Shashank Sastry, Lucy Ayres, Christopher Brault, Seth Byas, Michael Dompke, Michelle Dowell, Rowan Eggert, Aras Erdag, James Ervin, Dave Goodwin, Scarlett Nelson, Stephen Nichols, Olivia Tulgetske, Christian Zorman   +21 more
doaj   +1 more source

Cardiac‐Derived ECM Microspheres for Enhanced hiPSC‐CMs Maturation

Advanced Functional Materials, EarlyView.
Cardiac extracellular matrix microspheres derived from decellularized porcine heart provide a biomimetic 3D microenvironment for human induced pluripotent stem cell–derived cardiomyocytes (hiPSC‐CMs). This platform supports short‐ and long‐term culture, enhances structural organization, and promotes electrophysiological and functional maturation of ...
Jiazhu Xu, Joel Aboagye, Marcella Edwards, Nick Rogozinski, Yufeng Wen, Angello Huerta Gomez, Zui Pan, Ge Zhang, Huaxiao Yang, Yi Hong   +9 more
wiley   +1 more source

Sun, Earth and Moon. Relative movements and their consequences

Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2011
Cuando se pregunta a los estudiantes por la causa de las estaciones suelen responder: “en verano estamos más próximos al Sol y en invierno estamos más lejos del Sol”.
Cardenete García, Sebastián
doaj  

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

, 2013
We report photometric observations of the eclipsing close binary CSS21055 (SDSS J141126+200911) that strongly suggest that the companion to the carbon-oxygen white dwarf is a brown dwarf with a mass between 0.030 and 0.074 Msun.
Backhaus, U., Beuermann, K., Boesch, A., Dreizler, S., Hessman, F. V., Husser, T. -O., Nortmann, L., Schmelev, A., Springer, R.   +8 more
core   +1 more source

Dense Nanofibrillar Collagen–Silica Hybrids with High Strength and ECM‐Mimetic Tissue Integration

Advanced Functional Materials, EarlyView.
Dense nanofibrillar collagen–silica hybrids are engineered by synchronizing collagen fibrillogenesis with silica condensation, producing printable scaffolds that unexpectedly approach native extracellular matrix organization and strength. These cell‐free constructs guide endogenous cell‐infiltration, enable localized matrix remodeling, and integrate ...
Norein Norein, Shima Tavakoli, Philipp Wolf, Xie Ling, Veronica Rondahl, Klaus Leifer, Gry Hulsart‐Billström, Jöns Hilborn   +7 more
wiley   +1 more source

3D‐Printed Porous Hydroxyapatite Formed via Enzymatic Mineralization

Advanced Functional Materials, EarlyView.
Bone combines lightness, strength, and the ability to heal, inspiring new materials design. This work introduces a room‐temperature, enzyme‐mediated 3D printing method to create porous hydroxyapatite scaffolds. The process avoids energy‐intensive sintering, preserves bioactivity, and allows control over porosity and mineralization.
Francesca Bono, Anna Puiggalí‐Jou, Greta Cocchi, Mariangela Miccoli, Katharina Maniura‐Weber, Marcy Zenobi‐Wong, Esther Amstad   +6 more
wiley   +1 more source

Multi‐Frequency SuperDARN HF Radar Observations of the Ionospheric Response to the October 2023 Annular Solar Eclipse

Geophysical Research Letters
An annular solar eclipse was visible on 14 October 2023 from 15:00–21:00 UT as its path traveled across North, Central, and South America. In this letter, we present the first multi‐frequency Super Dual Auroral Radar Network (SuperDARN) observations of ...
E. G. Thomas, S. G. Shepherd, B. S. R. Kunduri, D. R. Themens   +3 more
doaj   +1 more source