scholarly journals Asteroid Evolution: Role of Geotechnical Properties

2015 ◽  
Vol 10 (S318) ◽  
pp. 111-121 ◽  
Author(s):  
Paul Sánchez
Keyword(s):  
Planetary Science ◽  
Geotechnical Properties ◽  
Science Community ◽  
Numerical Tools ◽  
Rubble Pile

AbstractThis paper presents a brief review and latest results of the work that has been carried out by the Planetary Science community in order to understand the role of the geotechnical properties of granular asteroids (commonly known as “rubble-pile” asteroids) in their formation, evolution and possible disruption. As such, we will touch in aspects of the theoretical and numerical tools that have been used with this objective and how the obtained results compare to the observed asteroids.

Gaia spectroscopic view of the asteroid main belt and beyond

2021 ◽  
Author(s):  
Marco Delbo ◽  
Laurent Galluccio ◽  
Francesca De Angeli ◽  
Paolo Tanga ◽  
Alberto Cellino ◽  
...  
Keyword(s):  
Solar System ◽  
Preliminary Investigation ◽  
Planetary Science ◽  
Reflectance Spectra ◽  
Physical Parameters ◽  
The Novel ◽  
Main Belt ◽  
Compositional Gradient ◽  
Solar System Object ◽  
Science Community

<div class="">Asteroids reflectance spectra in the visible light will be one of the novel products of the Gaia Data Release 3 (DR3). These spectra are produced from Gaia observations obtained by means of the blue and red photometers — the so-called BP and RP, respectively. We will review the strategy adopted to produce asteroid reflectance spectra from BP-RP data, focusing on the choice of spectro-photometric calibrations computed taking into account solar system object astrometry and suitable lists of solar-analog stars.</div> <div class=""> </div> <div class="">Our preliminary investigation shows that we will be able to obtain reflectance spectra for asteroids as small as some km in the main belt, by exploiting the fact that each object has been observed multiple times by Gaia. We will show the capability of Gaia to probe the detailed compositional gradient of the main belt down to small sizes and to study correlations between spectral classes and other asteroid physical parameters, such as albedo and size.</div> <div class=""> </div> <div class="">Concerning the brightest asteroids, we expect to have substantial signal at wavelengths shorter than 450 nm, allowing Gaia to examine this region of the spectrum that has been poorly investigated by ground-based asteroid spectroscopic surveys. This region is characterised by the presence of a reflectance downturn that is diagnostic for the composition of classes of primitive asteroids, for instance those including the parent bodies of carbonaceous chondrites. These asteroids may have played an important role for the delivery of prebiotic compounds to Earth during the early phases of solar system' s history and, as such, are at the center of attention of the planetary science community. </div>

scholarly journals REFLEKSI EPISTIMOLOGI DALAM METODOLOGI PENELITIAN (Suatu Kontemplasi atas Pekerjaan Penelitian)

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Saifullah Saifullah
Keyword(s):  
Research Methodology ◽  
Positive Impact ◽  
Research Process ◽  
Central Position ◽  
Building Science ◽  
Scientific Disciplines ◽  
Science Community ◽  
Quality Of Research

<p>Research methodology is the application of epistemology in philosophical which is realized by logico hypotetico verificative-deducto hypothetico verificative. The results of the evaluation of the quality of the research methodology that gave rise buildings recently become a standard formula valid and tested public. In this context it is necessary scrutiny of the functioning and the importance of pre usability, and value the benefits of the research process so that the quality of research produced a positive impact on building science researchers. The role of the researcher holds a central position of being able to adjust the ground circumstances. Benefit value for the benefit of life as the goal of research in theory and practical should be explicitly and implicitly always accompanies every step of research. A consequence of the value of the benefits of scientific research which is undertaken is delivering research results to the user community. The use of research methodologies in the study strongly influenced the extent of the ability of researchers and scientists at the clump science community are able to map the identity of the building a distinctive methodology of scientific disciplines that is useful for subsequent research.</p> <p>Metodologi Penelitian merupakan penerapan epistimologi secara filsafati yang diwujudkan dengan logico  hypotetico  verificative-deducto  hypothetico  verificative.  Hasil  evaluasi terhadap  kualitas  bangunan  metodologi  penelitian  yang  memunculkan  formula  baru menjadi standar yang valid dan teruji publik. Dalam konteks ini maka perlu pencermatan tentang fungsi dan kegunaan akan pentingnya pra, proses dan nilai manfaat riset agar kualitas riset yang dihasilkan berdampak positif pada bangunan keilmuan peneliti. Peran peneliti  memegang  posisi  sentral  karena  mampu  menyesuaikan  situasi  dan  kondisi lapangan. Nilai kemanfaatan bagi kemaslahatan hidup sebagai tujuan riset secara teoritis dan praktis sebaiknya secara eksplisit dan implisit selalu menyertai setiap langkah riset. Konsekuensi ilmiah dalam nilai manfaat riset yang dilakukan adalah menyampaikan hasilhasil riset ke masyarakat pengguna. Penggunaan metodologi penelitian dalam riset sangat dipengaruhi sejauhmana kemampuan peneliti dan komunitas ilmuan pada rumpun ilmu mampu memetakan jati diri bangunan metodologi disiplin keilmuan yang khas sehingga bermanfaat bagi peneliti berikutnya.</p>

Phonons in deformable microporous crystalline solids

2019 ◽  
Vol 234 (7-8) ◽  
pp. 513-527 ◽  
Author(s):  
Bogdan Kuchta ◽  
Filip Formalik ◽  
Justyna Rogacka ◽  
Alexander V. Neimark ◽  
Lucyna Firlej
Keyword(s):  
Periodic Structures ◽  
Structural Transformations ◽  
Crystalline Solids ◽  
Predictive Tool ◽  
Crystalline Materials ◽  
Numerical Tools ◽  
Collective Vibrations ◽  
First Time

Abstract Phonons are quantum elastic excitations of crystalline solids. Classically, they correspond to the collective vibrations of atoms in ordered periodic structures. They determine the thermodynamic properties of solids and their stability in the case of structural transformations. Here we review for the first time the existing examples of the phonon analysis of adsorption-induced transformations occurring in microporous crystalline materials. We discuss the role of phonons in determining the mechanism of the deformations. We point out that phonon-based methodology may be used as a predictive tool in characterization of flexible microporous structures; therefore, relevant numerical tools must be developed.

scholarly journals Fluid deformable surfaces

2019 ◽  
Vol 878 ◽  
pp. 1-4 ◽  
Author(s):  
A. Voigt
Keyword(s):  
Lipid Membranes ◽  
Shape Change ◽  
Governing Equations ◽  
Tight Coupling ◽  
Tangential Flow ◽  
Deformable Surfaces ◽  
Bending Elasticity ◽  
Natural Element ◽  
Numerical Tools

Lipid membranes are examples of fluid deformable surfaces, which can be viewed as two-dimensional viscous fluids with bending elasticity. With this solid–fluid duality any shape change contributes to tangential flow and vice versa any tangential flow on a curved surface induces shape deformations. This tight coupling between shape and flow makes curvature a natural element of the governing equations. The modelling and numerical tools outlined in Torres-Sánchez et al. (J. Fluid Mech., vol. 872, 2019, pp. 218–271) open a new field of study by enabling the exploration of the role of curvature in this context.

Assessment by Audiences Shows Little Effect of Science Communication Training

2020 ◽  
pp. 107554702097163
Author(s):  
Margaret A. Rubega ◽  
Kevin R. Burgio ◽  
A. Andrew M. MacDonald ◽  
Anne Oeldorf-Hirsch ◽  
Robert S. Capers ◽  
...  
Keyword(s):  
Science Communication ◽  
Vital Role ◽  
Communication Training ◽  
Communication Course ◽  
Good Communication ◽  
Public Science ◽  
The Public ◽  
Before And After ◽  
Science Community

As the science community has recognized the vital role of communicating to the public, science communication training has proliferated. The development of rigorous, comparable approaches to assessment of training has not kept pace. We conducted a fully controlled experiment using a semester-long science communication course, and audience assessment of communicator performance. Evaluators scored the communication competence of trainees and their matched, untrained controls, before and after training. Bayesian analysis of the data showed very small gains in communication skills of trainees, and no difference from untrained controls. High variance in scores suggests little agreement on what constitutes “good” communication.

Exploring the Growing Role of Terrestrial Carbon Across North Atlantic Fjords

2020 ◽  
Author(s):  
Craig Smeaton ◽  
William Austin
Keyword(s):  
Organic Carbon ◽  
Marine Environment ◽  
North Atlantic ◽  
Planetary Science ◽  
Terrestrial Environment ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Fjord Sediments

&lt;p&gt;Fjords are recognized as globally significant hotspots for the burial (Smith et al., 2015) and long-term storage (Smeaton et al., 2017) of marine and terrestrially derived organic carbon (OC). By trapping and locking away OC over geological timescales, fjord sediments provide a potentially important yet largely overlooked climate regulation service. The proximity of fjords to the terrestrial environment in combination with their geomorphology and hydrography results in the fjordic sediments being subsidized with organic carbon (OC) from the terrestrial environment. This terrestrial OC (OC&lt;sub&gt;terr&lt;/sub&gt;) transferred to the marine environment has traditionally be considered lost to the atmosphere in the form of CO&lt;sub&gt;2&lt;/sub&gt; in most carbon (C) accounting schemes yet globally it is estimated that 55% of OC trapped in fjord sediments is derived from terrestrial sources (Cui et al., 2016). So is this terrestrial OC truly lost? Here, we estimate the quantity of OC&lt;sub&gt;terr&lt;/sub&gt; held within North Atlantic fjords with the aim of better understanding the recent and long-term role of the terrestrial environment in the evolution of these globally significant sedimentary OC stores. By understanding this subsidy of OC from the terrestrial to the marine environment we can take the first steps in quantifying the terrestrial OC stored in fjords and the wider coastal marine environment.&lt;/p&gt;&lt;p&gt;Cui, X., Bianchi, T.S., Savage, C. and Smith, R.W., 2016. Organic carbon burial in fjords: Terrestrial versus marine inputs.&amp;#160;&lt;em&gt;Earth and Planetary Science Letters&lt;/em&gt;,&amp;#160;&lt;em&gt;451&lt;/em&gt;, pp.41-50.&lt;/p&gt;&lt;p&gt;Smeaton, C., Austin, W.E., Davies, A., Baltzer, A., Howe, J.A. and Baxter, J.M., 2017. Scotland's forgotten carbon: a national assessment of mid-latitude fjord sedimentary stocks.&amp;#160;&lt;em&gt;Biogeosciences&lt;/em&gt;.&lt;/p&gt;&lt;p&gt;Smith, R.W., Bianchi, T.S., Allison, M., Savage, C. and Galy, V., 2015. High rates of organic carbon burial in fjord sediments globally.&amp;#160;&lt;em&gt;Nature Geoscience&lt;/em&gt;,&amp;#160;&lt;em&gt;8&lt;/em&gt;(6), p.450.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

Channelling Our Efforts: Europlanet in Social Media

2020 ◽  
Author(s):  
Helen Usher ◽  
Sarah Roberts ◽  
Anita Heward
Keyword(s):  
Social Media ◽  
Data Collection ◽  
Planetary Science ◽  
Communication Strategy ◽  
Media Communication ◽  
Mailing Lists ◽  
The Social ◽  
Science Community ◽  
Social Media Communication

&lt;div dir=&quot;ltr&quot;&gt;The (small) Europlanet social media team has agreed aims of: Informing, Enthusing, Engaging, Encouraging and Celebrating the European Planetary Science Community and the wider community too.&amp;#160; Their work supplements the more traditional channels of website, newletters and mailing lists.&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;&amp;#160;&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;But how can this be done most effectively?&amp;#160; What channels should be used?&amp;#160; What content? What frequency?&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;&amp;#160;&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;If the needs of the communities are to be met, they first need to be identified.&amp;#160; There is currently a lack of data for this.&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;&amp;#160;&lt;/div&gt; &lt;div dir=&quot;ltr&quot;&gt;The proposed interactive poster will pose some questions for the community to consider during EPSC2020, link to a survey for data collection, and use the interactive, virtual nature of the meeting to stimulate a wide discussion.&amp;#160; The data and views of the community will then be used to inform the social media communication strategy for the remainder of the Europlanet 2024 RI Programme.&lt;/div&gt;

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