Novel Class of Heterometallic Cubane and Boride Clusters
... number of different clusters with both main group and transition metal elements. Over the past few decades, extensive efforts have been made to synthesize mixed-metal chalogenide clusters of high nuclearity, and exploitation of new cluster components continues to be an imperative stage for accomplishi ...
... number of different clusters with both main group and transition metal elements. Over the past few decades, extensive efforts have been made to synthesize mixed-metal chalogenide clusters of high nuclearity, and exploitation of new cluster components continues to be an imperative stage for accomplishi ...
- Spiral - Imperial College London
... swer to this question. While the regime of the TSI variability over the 11-year cycle is well-established – it varies in phase with solar activity (see e.g. Fröhlich 2006; Ball et al. 2012; Solanki et al. 2013, and references therein), the regime of the solar variability in the visible part of the ...
... swer to this question. While the regime of the TSI variability over the 11-year cycle is well-established – it varies in phase with solar activity (see e.g. Fröhlich 2006; Ball et al. 2012; Solanki et al. 2013, and references therein), the regime of the solar variability in the visible part of the ...
Cataclysmic Variables
... near 80 minutes is reached. After this point, the structure of the secondary again changes (becoming degenerate) and the orbital period increases. A cataclysmic variable is usually identified by its variability on timescales of minutes (from flickering) to hours (from orbital variations) to weeks- ...
... near 80 minutes is reached. After this point, the structure of the secondary again changes (becoming degenerate) and the orbital period increases. A cataclysmic variable is usually identified by its variability on timescales of minutes (from flickering) to hours (from orbital variations) to weeks- ...
The magnetic field and wind confinement of b Cephei: new clues for
... pulsation periodogram as an ‘ ¼ 2 mode (which would apparently require the star to have an effective temperature and/or luminosity inconsistent with the observed values). However, it appears that the dashed tracks in Shibahashi & Aerts’s (2000) fig. 2 (indicating the locus of stellar models that can ...
... pulsation periodogram as an ‘ ¼ 2 mode (which would apparently require the star to have an effective temperature and/or luminosity inconsistent with the observed values). However, it appears that the dashed tracks in Shibahashi & Aerts’s (2000) fig. 2 (indicating the locus of stellar models that can ...
Dressing and Charbonneau, 2013 - Harvard
... tracks and isochrones are available electronically4 and ...
... tracks and isochrones are available electronically4 and ...
3D LTE spectral line formation with scattering in red giant stars
... ISM in their envelopes, allowing detailed studies of nucleosynthesis processes and Galactic chemical evolution (e.g., Beers & Christlieb 2005). Most abundance studies of metal-poor stars rely either on 1D LTE or on 1D non-LTE syntheses. The effects of 3D line formation have not yet been fully explore ...
... ISM in their envelopes, allowing detailed studies of nucleosynthesis processes and Galactic chemical evolution (e.g., Beers & Christlieb 2005). Most abundance studies of metal-poor stars rely either on 1D LTE or on 1D non-LTE syntheses. The effects of 3D line formation have not yet been fully explore ...
Doppler effect
... EXAMPLE: A Doppler weather radar is a specialized radar that makes use of the Doppler effect to produce velocity data about objects at a distance. It does this by beaming a microwave signal towards a desired target and listening for its reflection, then analyzing how the frequency of the returned si ...
... EXAMPLE: A Doppler weather radar is a specialized radar that makes use of the Doppler effect to produce velocity data about objects at a distance. It does this by beaming a microwave signal towards a desired target and listening for its reflection, then analyzing how the frequency of the returned si ...
Wavelength Division Multiplexing of a Fibre
... through the FBG was directd through the DWDM, with the output of the relevant channel (31) going to the first input on the TRDS. The signal reflected from the FBG, was then directed to the second DWDM filter via a circulator. Again the output from channel 31 was used, and connected to the second inp ...
... through the FBG was directd through the DWDM, with the output of the relevant channel (31) going to the first input on the TRDS. The signal reflected from the FBG, was then directed to the second DWDM filter via a circulator. Again the output from channel 31 was used, and connected to the second inp ...
MORPHOLOGICAL CLASSIFICATION OF GALAXIES INTO
... and 650,000 neurons. Their method does not use any feature extraction at all and the only preprocessing they do is to scale down the variable sized image of the dataset into 256 x 256 fixed sized images. The neurons are trained on the raw RGB values of the pixels. The authors reported results using ...
... and 650,000 neurons. Their method does not use any feature extraction at all and the only preprocessing they do is to scale down the variable sized image of the dataset into 256 x 256 fixed sized images. The neurons are trained on the raw RGB values of the pixels. The authors reported results using ...
pdf
... first order and he focuses on the water window, C K (0.28 keV) to O K (0.53 keV), where phase-blazed gratings can be made from Cr, Cu, Ni, and Ge. Finally, it is important to note that the general theory of zone plates12 shows that they obtain an angular resolution equal to that of a comparable lens ...
... first order and he focuses on the water window, C K (0.28 keV) to O K (0.53 keV), where phase-blazed gratings can be made from Cr, Cu, Ni, and Ge. Finally, it is important to note that the general theory of zone plates12 shows that they obtain an angular resolution equal to that of a comparable lens ...
Debris disks from an astronomical and an astrobiological viewpoint Gianni Cataldi
... We shall first have a brief look on the history of debris disks in astronomy. Advances in our understanding of debris disks have often been connected to new opportunities of observing the sky in the infrared (IR) portion of the electromagnetic spectrum, since the dust making up the disk thermally ra ...
... We shall first have a brief look on the history of debris disks in astronomy. Advances in our understanding of debris disks have often been connected to new opportunities of observing the sky in the infrared (IR) portion of the electromagnetic spectrum, since the dust making up the disk thermally ra ...
Stellar activity in exoplanet hosts Enrique Herrero Casas
... stars for a targeted transit search was presented. A search within this subset would have an expected rate of findings increased in a factor of 2 o 3 with respect to a search on the initial sample (Herrero et al. 2012). The high precision photometry provided by the space missions Kepler and CoRoT has ...
... stars for a targeted transit search was presented. A search within this subset would have an expected rate of findings increased in a factor of 2 o 3 with respect to a search on the initial sample (Herrero et al. 2012). The high precision photometry provided by the space missions Kepler and CoRoT has ...
The Celestial Sphere CHAPTER 1
... Figure S2.2: Results for Problem 2.16. 2.17 (Note: Orbit can be downloaded from the companion web site at http://www.aw-bc.com/astrophysics.) (a) See Fig. S2.3. (b) See Fig. S2.3. (c) Figure S2.3 shows that the orbit of Mars is very close to a perfect circle, with the center of the circle slightly o ...
... Figure S2.2: Results for Problem 2.16. 2.17 (Note: Orbit can be downloaded from the companion web site at http://www.aw-bc.com/astrophysics.) (a) See Fig. S2.3. (b) See Fig. S2.3. (c) Figure S2.3 shows that the orbit of Mars is very close to a perfect circle, with the center of the circle slightly o ...
An analogy strategy for transformation optics Yao Chen Liu
... Transformation optics has aroused interest from a wide spectrum of scientific communities [1–10]. The term was coined based on the fact that Maxwell’s equations are form-invariant under coordinate transformations [2], meaning electromagnetic waves in one coordinate system can be mapped into another o ...
... Transformation optics has aroused interest from a wide spectrum of scientific communities [1–10]. The term was coined based on the fact that Maxwell’s equations are form-invariant under coordinate transformations [2], meaning electromagnetic waves in one coordinate system can be mapped into another o ...
University of Groningen Photo-ionization studies of nebulae
... Abstract — A parameter study of the spectral evolution of a typical post-AGB star, with particular emphasis on the evolution of the infrared colors, is presented. The models are based on the latest evolutionary tracks for hydrogen burning post-AGB stars. For such tracks the evolutionary rate is very ...
... Abstract — A parameter study of the spectral evolution of a typical post-AGB star, with particular emphasis on the evolution of the infrared colors, is presented. The models are based on the latest evolutionary tracks for hydrogen burning post-AGB stars. For such tracks the evolutionary rate is very ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.