249 research outputs found
Remaining Socially Responsible in the Age of Smart Sustainable Production
This paper explores the transformations necessary in the field of social responsibility and social accountability employed by manufacturing companies as they transition to a model of smart and sustainable production. A focus group of managers in production companies has been interviewed concerning the challenges and support they derive for their environmental and community approaches, as the firms deploy advanced Industry 4.0 tools such as the internet of things, digital twins and virtual reality to upgrade their manufacturing systems and processes. The results are presented and discussed based on a set of ranked objective indicators, and proposals for a future implementation scenario are advanced
EPIC 201702477b: A TRANSITING BROWN DWARF FROM K2 IN A 41 DAY ORBIT
We report the discovery of EPIC 201702477b, a transiting brown dwarf in a long period (40.73691 ± 0.00037 day) and eccentric (e = 0.2281 ± 0.0026) orbit. This system was initially reported as a planetary candidate based on two transit events seen in K2 Campaign 1 photometry and later validated as an exoplanet candidate. We confirm the transit and refine the ephemeris with two subsequent ground-based detections of the transit using the Las Cumbres Observatory Global Telescope 1 m telescope network. We rule out any transit timing variations above the level of ~30 s. Using high precision radial velocity measurements from HARPS and SOPHIE we identify the transiting companion as a brown dwarf with a mass, radius, and bulk density of 66.9 ± 1.7 MJ, 0.757 ± 0.065 RJ, and 191 ± 51 g cm[superscript −3] respectively. EPIC 201702477b is the smallest radius brown dwarf yet discovered, with a mass just below the H-burning limit. It has the highest density of any planet, substellar mass object, or main-sequence star discovered so far. We find evidence in the set of known transiting brown dwarfs for two populations of objects—high mass brown dwarfs and low mass brown dwarfs. The higher-mass population have radii in very close agreement to theoretical models, and show a lower-mass limit around 60 MJ. This may be the signature of mass-dependent ejection of systems during the formation process
Ruling out the orbital decay of the WASP-43b
We present 15 new transit observations of the exoplanet WASP-43b in the
,, and filters with the 1.0-m telescopes of Las Cumbres Observatory
Global Telescope (LCOGT) Network and the IAC80 telescope. We combine our 15 new
light curves with 52 others from literature, to analyze homogeneously all the
available transit light curves of this exoplanet. By extending the time span of
the monitoring of the transits to more than , and by analyzing the
individual mid-times of 72 transits, we study the proposed shortening of the
orbital period of WASP-43b. We estimate that the times of transit are
well-matched by our updated ephemeris equation, using a constant orbital
period. We estimate an orbital period change rate no larger than , which is fully consistent with a constant period. Based on
the timing analysis, we discard stellar tidal dissipation factors
. In addition, with the modelling of the transits we update the
system parameters: , and
, noticing a difference in the relative size of the planet
between optical and NIR bands.Comment: Accepted for publication in A
International Cooperation for Smart and Sustainable Agriculture
This chapter presents international best practices, realized within Europe, and focuses on cooperation for developing innovation support mechanisms and approaches in the area of smart agriculture. Specific situations are presented and analyzed in detailed regarding the requirements of smart agriculture and the possibilities to implement its percepts. As a consequence, solutions are proposed both in the technical and management domains to help speed up the transition from classical agriculture techniques to technology infused approaches, suitable for the current needs of this sector. Also, policy recommendations are developed based on the scientific findings in alignment with the evolution of the competitive pressures
A Consistent Orbital Stability Analysis for the GJ 581 System
We apply a combination of N-body modeling techniques and automated data
fitting with Monte Carlo Markov Chain uncertainty analysis of Keplerian orbital
models to radial velocity data to determine long term stability of the
planetary system GJ 581. We find that while there are stability concerns with
the 4-planet model as published by Forveille et al. (2011), when uncertainties
in the system are accounted for, particularly stellar jitter, the hypothesis
that the 4-planet model is gravitationally unstable is not statistically
significant. Additionally, the system including proposed planet g by Vogt et
al. (2012) also shows some stability concerns when eccentricities are allowed
to float in the orbital fit, yet when uncertainties are included in the
analysis the system including planet g also can not be proven to be unstable.
We present revised reduced chi-squared values for Keplerian astrocentric
orbital fits assuming 4-planet and 5-planet models for GJ~581 under the
condition that best fits must be stable, and find no distinguishable difference
by including planet g in the model. Additionally we present revised orbital
element estimates for each assuming uncertainties due to stellar jitter under
the constraint of the system being gravitationally stable.Comment: 26 pages, 8 figures, 6 tables, accepted for publication in the
Astrophysical Journa
Modalities to Implement the Multilinguality in Web DYNPRO ABAP
The integrated platform SAP Netweaver is a platform that offers support in realizing Web bussiness applications that use the Model View Controller (MVC) concept. The Multilinguality being a property of this platform. The purpose of this article is to highlight the modality to internationalize a Web Dynpro ABAP project The techniques used for the internationalization of a Web Dynpro ABAP application are: the OTR [Online Text Repository] translations, the implementation of the assistance class and the technique of information internationalization in a database. The case study has been performed on the trial “SAP Netweaver 7.0 Application Server ABAP” that offered the possibility to log-in in English and German languages.Computer programes, software
An HST/STIS Optical Transmission Spectrum of Warm Neptune GJ 436b
GJ 436b is a prime target for understanding warm Neptune exoplanet
atmospheres and a target for multiple JWST GTO programs. Here, we report the
first space-based optical transmission spectrum of the planet using two
HST/STIS transit observations from 0.53-1.03 microns. We find no evidence for
alkali absorption features, nor evidence of a scattering slope longward of 0.53
microns. The spectrum is indicative of moderate to high metallicity (~100-1000x
solar) while moderate metallicity scenarios (~100x solar) require aerosol
opacity. The optical spectrum also rules out some highly scattering haze
models. We find an increase in transit depth around 0.8 microns in the
transmission spectra of 3 different sub-Jovian exoplanets (GJ 436b, HAT-P-26b,
and GJ 1214b). While most of the data come from STIS, data from three other
instruments may indicate this is not an instrumental effect. Only the transit
spectrum of GJ 1214b is well fit by a model with stellar plages on the
photosphere of the host star. Our photometric monitoring of the host star
reveals a stellar rotation rate of 44.1 days and an activity cycle of 7.4
years. Intriguingly, GJ 436 does not become redder as it gets dimmer, which is
expected if star spots were dominating the variability. These insights into the
nature of the GJ 436 system help refine our expectations for future
observations in the era of JWST, whose higher precision and broader wavelength
coverage will shed light on the composition and structure of GJ 436b's
atmosphere.Comment: 20 pages, 11 figures, 5 tables, Accepted to AJ. A full version of
table 1 is included as table1_mrt.tx
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