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Featured
Europe's future in space
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
17.02.2017
Co-author:
Caption:
Made by euronews, the most watched news channel in Europe. euronews knowledge brings you a fresh mix of the world's most interesting know-hows, directly from space and sci-tech experts.
"Futuris" reaches for the sky with the wings of the future
Engineering (Civil engineering)
Date of upload:
08.03.2019
Co-author:
Caption:
Made by euronews: the most watched news channel in Europe
Race to build Ariane 6 rocket launch pad
Engineering (Civil engineering)
Date of upload:
04.05.2018
Co-author:
Caption:
The space race to build the new Ariane 6 rocket pad in French Guiana is underway. euronews knowledge brings you a fresh mix of the world's most interesting know-hows, directly from space and sci-tech experts. Made by euronews, the most watched news channel in Europe.
Magnetic field inference in spicules and coronal rain clumps | Matheus Aguiar-Kriginsky Silva
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
24.05.2021
Co-author:
Caption:
In this seminar, we aim to present the results of two recent works centred at the use of spectropolarimetric data obtained with the CRISP instrument at the SST in the Ca II 845.2 nm line. With these observations, we obtain information about the magnetic field present in chromospheric spicules and coronal rain clumps. For this purpose, we have used the Weak-field approximation (WFA), which albeit being computationally simple to implement, needs careful assessment of the conditions of the plasma to be correctly applied. Magnetic fields of the order of hundreds of Gauss are inferred. We also combine the Ca II 845.2 nm observations with simultaneous Hα observations to estimate the temperature and non-thermal velocity of the plasma in coronal rain and spicules using the observed Doppler amplitu
Quasi-periodic pulsations in stellar flares
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
10.09.2015
Co-author:
Chloe Pugh, Valery Nakariakov
Abstract:
Quasi-periodic pulsations (QPPs) are a common feature of solar flares that are observed in many different wavelengths. Although QPPs appear not to be as abundant in white light Kepler flare light curves as they are in solar flares, albeit in different wavelengths the structure of the pulsations are strikingly similar, hinting that the same underlying processes govern both solar and stellar flares. Here we consider a special case, observed on KIC9655129, which shows evidence of multiple periodicities. We speculate that the presence of multiple periodicities is a good indication that the QPPs were caused by magnetohydrodynamic oscillations, further strengthening the case that the physical processes in operation during stellar flares are at least analogous to those in solar flares.
Accurate numerical solutions to the forward problem of local helioseismology
Natural Sciences (Mathematics)
Date of upload:
14.07.2016
Co-author:
Michael Leguèbe, Damien Fournier, Aaron C. Birch, Laurent Gizon in Collaboration with Inria team Magique3D
Abstract:
We compute acoustic Green’s functions in an axisymmetric solar background model, which may include a meridional flow and differential rotation. The wave equation is solved in the frequency domain using a finite element solver. A transparent boundary condition for the waves is implemented in the chromosphere, which represents a great improvement in computational efficiency compared to implementations based on ’sponge layers’. We perform various convergence studies that demonstrate that wave travel times can be computed with an accuracy of 0.001 s. This high level of numerical accuracy is required to interpret travel times in the deep interior, and is achieved thanks to a refined mesh in the near surface layers and around the source of excitation. The wave solver presented here lays the ground for future iterative inversion methods for flows in the deep solar interior.
Observations of Red Giants with SONG
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
03.08.2016
Co-author:
Abstract:
One of the outstanding and unforeseen results from the Kepler mission is our new insight and understanding of red giant stars. These highly evolved stars, which are in the last stages of their life, provide extremely useful information when trying to develop stellar evolutionary models. Furthermore, they show stochastically excited oscillations thus allowing to use asteroseismic techniques to derive conditions of the most internal layers. Bright giants stars are well suited to be studied with the 1m telescopes in the Stellar Observations Network Group project (SONG) using a high resolution echelle spectrograph performing high precision measurements of their the radial velocity. The prototype node- the Hertzsprung SONG telescope- was inaugurated in October 2014 and is located at the Teide Observatory on Tenerife and providing continuous and high quality observations since then, When selecting the best targets for SONG, a precision of 1-2 m/s per point is reachable using the iodine method and a number of red giants have been observed with the SONG telescope since scientific operation started. In this talk we present the first results of these specific campaigns for a few red giants in which eigenmodes have been identified and their global seismic parameters derived.
Comparison of damping mechanisms for transverse waves in coronal loops.
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
22.01.2017
Co-author:
I. Arregui
Abstract:
Damping of transverse waves in different solar coronal structures is a commonly observed property and a source of information about coronal conditions. Although resonant damping seems to be the most accepted mechanism for damping of transverse waves, there are other possible mechanisms. We have carried out a Bayesian analysis comparing three different models which could explain the damping in coronal loops. Our results indicate that resonant absorption is the most probable mechanism for low ratios between damping time and wave period, while the wave leakage mechanism is the best candidate for high ratios. Nonetheless, the evidence for one model against another shows a strong dependence on the data errors.
Gas towards the Gamma­-ray-­Emitting Supernova Remnant W28 (and others)
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
21.12.2015
Co-author:
Gavin Rowell, Matthieu Renaud, Phoebe de Wilt, Fabien Voisin, Yasuo Fukui, Michael Burton, Andrew Walsh, Akiko Kawamura, Andrew Walsh, Akiko Kawamura, Felix Aharonian
Abstract:
We present the results of molecular spectral line observations towards Supernova Remnants such as W28, RX J1713.7-3946 and HESS J1731-347. These remnants exhibit TeV gamma-ray emission, beacons for the presence of enhanced populations of high energy particles. It follows that these objects may accelerate Galactic cosmic-ray protons via the diffusive shock mechanism, but knowledge of the environment local to such remnants is required to constrain such scenarios. The Mopra radio telescope is ideal for probing the interstellar environments of HESS gamma-ray sources through large-scale molecular line surveys. Mopra can be employed to hunt for dense gas-tracing CS and NH3 transitions to identify potential cosmic-ray target material, while simultaneously searching for shock-tracing SiO emission lines which can directly highlight shock-disrupted gas. Furthermore, spectral line width gives an insight into gas dynamics and Mopra is capable of measuring this at a ~1' resolution over degree-scale regions. We present results from recent 7 and 12mm surveys towards the above-mentioned TeV-emitting Supernova Remnants and discuss the implications for distance, the diffusion of cosmic-rays and the high energy gamma-ray spectrum.
Survival and activity of bacteria in air: Why do we care?
Natural Sciences (Biology)
Date of upload:
25.04.2016
Co-author:
Kai Finster, Meilee Ling, Maher Sahyoun, Morten Dreyer, Stine Holm, Martin Rasmussen, Stephanie Pilgaard
Abstract:
The presentation deals with activity of airborne microbial cells and how this is important for expanding our understanding of habitability and biosignatures.
Field line helicity as a tool for coronal physics
Natural Sciences (Physics)
Date of upload:
22.11.2017
Co-author:
G. Hornig, M.H. Page
Abstract:
What if there were a way to identify **where** the magnetic helicity is concentrated within a three- dimensional magnetic field? At first sight this question appears meaningless, since magnetic helicity is an integral over the whole volume of the magnetic field. But, in fact, it is possible to decompose this total helicity as an integral over individual "field line helicities" for each magnetic field line in the domain. All of these are ideal-invariant, topological quantities, and they allow us to quantify in a meaningful way how magnetic helicity is distributed within the domain. In this talk, I will show how this idea can be practically applied to typical extrapolations of the Sun's coronal magnetic field that are used in solar physics.
Development of instrumentation for solar observations at the Brazilian National Institute for Space
Natural Sciences (Physics)
Date of upload:
15.11.2018
Co-author:
Abstract:
The solar electromagnetic and corpuscular emissions are strongly modulated by the evolution of the magnetic structure of the solar atmosphere, which is imprinted in the solar surface. The evolution of the magnetic structure leads to gradual changes in the solar activity (space climate) as well as violent events (space weather) that affect the whole Heliosphere. In particular, the solar output affects the ionized and neutral components of the Earth’s atmosphere that have a direct impact on human activities from agriculture to high-technological systems. The solar magnetism is driven by the energy transport from the inner layers to the solar atmosphere. Although systematic observations have revealed several features related to the evolution of solar activity, there is not a complete explanation of the physical processes that lead to solar activity cyclic variability and its long-term changes. Here we present a brief description of the development of a magnetograph and visible-light imager instrument to study the solar dynamo processes through observations of the solar surface magnetic field distribution. The instrument will provide measurements of the vector magnetic field and the line-of-sight velocity in the solar photosphere. As the magnetic field anchored at the solar surface produces most of the structures and energetic events in the upper solar atmosphere and significantly influences the Heliosphere, the development of this instrument plays an essential role in reaching the scientific goals of The Atmospheric and Space Science Coordination (CEA) at the Brazilian National Institute for Space Research (INPE). In particular, the INPE’s Space Weather program will benefit most from the development of this technology. Additionally, we expect that this project will be the starting point to establish a robust research program on Solar System Research at INPE. The proposed instrument has been designed to operate on the ground, but with a conceptual design flexible enough to be adapted to work on a balloon and space-based platforms. In this way, our main aim is acquiring know-how progressively to build state-of-art solar vector magnetograph and visible-light imagers for space-based platforms to contribute to the efforts of the solar-terrestrial physics community to address the main unanswered questions on how our nearby Star works.
Experimental results for infrared aberration tracking using a correlation algorithm on two star extended field
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
20.10.2015
Co-author:
Paulo Garcia, Antonio Amorim, Paulo Gordo and GRAVITY consoritum
Abstract:
We report an experimental results of different correlation algorithms for an extended source wavefront sensor.
Characterization of Physicochemical and Spectroscopic Properties of Biofield Energy Treated Bio Peptone
Natural Sciences (Biology)
Date of upload:
20.12.2016
Co-author:
Mahendra Kumar Trivedi, Dahryn Trivedi, Gopal Nayak, Khemraj Bairwa, Snehasis Jana
Abstract:
Bio peptone is a combination of enzymatic digest of animal tissues and casein; and generally used for the growth of several varieties of microbes. The aim of present study was to investigate the impact of biofield energy treatment on the physicochemical and spectroscopic properties of bio peptone. The present study was carried out in two groups i.e. control and treated. The control group was kept without treatment, while the treated group was subjected to Mr. Trivedi’s biofield energy treatment. Subsequently, both the samples were assessed using numerous analytical techniques. The X-ray diffractograms (XRD) showed the halo patterns of XRD peaks in both the samples. The particle size analysis exhibited about 4.70% and 17.58% increase in the d50 (average particle size) and d99 (particle size below which 99% particles are present), respectively of treated bio peptone as compared to the control. The surface area analysis revealed the 253.95% increase in the specific surface area of treated sample as compared to the control. The differential scanning calorimetry (DSC) analysis showed the 29.59% increase in the melting temperature of treated bio peptone sample as compared to the control. Thermogravimetric analysis (TGA) showed the increase in onset of degradation temperature by 3.31% in the treated sample with respect to the control. The Fourier transform infrared (FT-IR) study revealed the changes in the wavenumber of functional groups such as O-H stretching from 3066 cm-1 to 3060 cm-1; C-H stretching from 2980, 2893, and 2817 cm-1 to 2970, 2881, and 2835 cm-1, respectively; N-H bending from 1589 cm-1 to 1596 cm-1; C=C stretching from 1533 cm-1 to 1525 cm-1; and P=O stretching from 1070 cm-1 to 1078 cm-1 in treated sample as compared to the control. The UV-vis spectroscopy showed the similar patterns of absorbance maxima (λmax) i.e. at 259 nm and 257 nm in both the control and treated samples, respectively. Overall, the analytical results suggested that Mr. Trivedi’s biofield energy treatment has substantial effect on physicochemical and spectral properties of bio peptone. Owing to this, the treated bio peptone might be more effective as culture medium than the corresponding control.
Evaluation of the Energy of Consciousness Healing Treated Withania Somnifera (Ashwagandha) Root Extract Using LC-MS, GC-MS, and NMR Spectroscopy
Natural Sciences (Analytical Chemistry, Method Development (Chemistr)
Date of upload:
06.07.2017
Co-author:
Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Alan Joseph Balmer, Dimitrius Anagnos, Janice Patricia Kinney, Joni Marie Holling, Joy Angevin Balmer, Lauree Ann Duprey-Reed, Vaibhav Rajan Parulkar, Parthasarathi Panda, Kalyan Kumar Sethi, Snehasis Jana
Abstract:
Withania somnifera (Ashwagandha) root extract is very useful herbal medicine since from ancient time. The current study designed to investigate the impact of The Trivedi Effect® - Energy of Consciousness Healing Treatment on the structural properties of the ashwagandha root hydroalcoholic extract using LC-MS, GC-MS, and NMR spectroscopy. Ashwagandha root extract was divided into two parts – one part was control (without treatment), while other part was treated with the Energy of Consciousness Healing Treatment remotely by seven renowned Biofield Energy Healers and defined as the Biofield Energy Treated sample. The LC-MS analysis revealed that the retention time of the phytoconstituents remained same in both the control and treated samples, whereas the peak area % at respective retention time was significantly altered. The peak area% of the treated sample at Rt of 5.3, 5.5, 6.4, 6.5, 6.8, 6.9, 7.1, 7.3, 7.8, 7.9, 8.0, 8.2, 8.4, 8.6, 8.8, 9.0, 9.1, and 10.1 minutes were significantly reduced by 0.57% to 38.10% compared to the control sample. In addition, the peak area% of the treated sample at Rt of 5.7, 6.7, and 8.1 minutes were significantly increased by 16.00%, 244.44% and 19.62%, respectively compared with the control sample. A total of 21 withanolides such as withanoside IV, coagulin Q, viscosa lactone B, withanolide A, withaferin A, withanone, withanolide D, ixocarpalactone A and withanolide sulfoxide, ixocarpalactone A, withanolide sulfoxide, withanolide B, etc. were proposed with their structure from the molecular mass at m/z 783, 569, 621, 489, 473, 767, 471, 505, 992, and 455 at retention times of 6.4, 6.5, 6.8, 7.1, 7.9, 8.1, 8.4, 9.1, and 10.1 minutes with the help of GC-MS and NMR data of both the control and Biofield Energy Treated samples. There were significant changes observed in the peak intensity values at the same retention time in the Biofield Energy Treated sample in the range of -75.32% to 108.51% compared with the control sample. These findings suggest that The Trivedi Effect® - Energy of Consciousness Healing Treatment could be beneficial for altering the concentration of the phytoconstituents in the ashwagandha root extract by modifying their intrinsic physicochemical properties, which might be helpful to improve the bioavailability of active constituents of W. somnifera extract that might provide better therapeutic response against inflammatory diseases, immunological disorders, stress, arthritis, cancer, diabetes, sexual disorders, aging and other chronic infections.
Biofield Energy Healing Treatment on Physicochemical, Thermal and Behavioral Properties of Ashwagandha (Withania somnifera) Root Extract
Natural Sciences ()
Date of upload:
19.07.2017
Co-author:
Mahendra Kumar Trivedi, Alice Branton, Gopal Nayak, Alan Joseph Balmer, Dimitrius Anagnos, Janice Patricia Kinney, Joni Marie Holling, Joy Angevin Balmer, Lauree Ann Duprey-Reed, Vaibhav Rajan Parulkar, Parthasarathi Panda, Kalyan Kumar Sethi, Snehasis Jana
Abstract:
Ashwagandha (Withania somnifera) is a well-known traditional medicinal herb and its root extract have a broad range of pharmacological activities. The current study aimed to explore the impact of The Trivedi Effect® - Energy of Consciousness Healing Treatment (Biofield Energy Healing Treatment) on the physicochemical, thermal and behavioral properties of ashwagandha root extract using PXRD, PSD, FT-IR, UV-vis spectroscopy, TGA, and DSC analysis. Ashwagandha root extract was divided into two parts – one part was control without any Biofield Energy Treatment and another part was treated with the Consciousness Energy Healing Treatment remotely by seven renowned Biofield Energy Healers and defined as The Trivedi Effect® treated sample. The PXRD analysis exhibited that both the treated and control samples were amorphous in nature. The particle size distribution values of the treated sample at d10, and d50 were increased by 16.94% and 8.01%, respectively, whereas at d90 particle size value was decreased by 7.02% compared with the control sample. The surface area analysis revealed that the surface area of the treated sample was decreased by 4.17% compared with the control sample. The FT-IR analysis indicated the alteration of the force constant for the functional groups of the treated sample compared with the control sample. The UV-vis analysis revealed that the wavelength for the maximum absorbance of the control and treated samples were at 205.2 nm. The TGA analysis revealed that the total weight loss was decreased by 1.13% in the treated sample as compared to the control sample. Similarly, the DTG analysis revealed that the maximum thermal degradation temperature in the treated sample was increased by 0.14% compared to the control the sample. The DSC analysis indicated that the vaporization temperature and the latent heat of vaporization of the treated sample were increased by 1.45% and 11.30%, respectively as compared to the control sample. Similarly, onset, peak, endset melting temperature and the latent heat of fusion of the treated sample were significantly increased by 18.90%, 18.86%, 20.18%, and 511.11%, respectively compared to the control sample. This indicated that the treated sample was thermally more stable as compared to the control sample. The Trivedi Effect® - Energy of Consciousness Healing Treatment might lead to have better powder flowability and long-term storage stability compared with the control sample. Thus, the treated ashwagandha root extract might provide better therapeutic response against inflammatory diseases, immunological disorders, stress, arthritis, cancer, diabetes, sexual disorders, aging and other chronic infections.
Seismology of the Sun and the Distant Stars 2016
Natural Sciences (Astrophysics and Astrononmy)
Start date:
10.07.2016
End date:
14.07.2016
Location:
Angra do Heroísmo, Terceira-Açores, Portugal
Towards a Multimodal Construction Grammar
Humanities (Linguistics)
Start date:
09.03.2016
End date:
11.03.2016
Location:
Osnabrück, Germany
The Physics of the Sun from the Interior to the Outer Atmosphere
Natural Sciences (Astrophysics and Astrononmy)
Start date:
14.01.2017
End date:
19.01.2017
Location:
Arrecife, Lanzarote, Spain
Helicity Thinkshop 3
Natural Sciences (Astrophysics and Astrononmy)
Start date:
19.11.2017
End date:
24.11.2017
Location:
Tokyo (Japan)
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