2,777 research outputs found
RAVE III - Koordinierung der Offshore-Testfeldforschung
No full textDer erste deutsche Offshore Windpark »alpha ventus« dient neben einer rein kommerziellen Nutzung im besonderen Maße auch als Testfeld für eine breit aufgestellte Offshore-Forschung, die unter dem Dach der Forschungsinitiative »RAVE - Research at alpha ventus« zusammengeführt wird. Mehr als 40 Institute, Firmen und Behörden forschen in RAVE zu Fragen der Offshore Windenergienutzung. Das RAVE-Koordinationsprojekt stellt seit 2007 das zentrale Instrument dar, mit dem nicht nur die gesamte RAVE-Initiative koordiniert, sondern zeitgleich auch ein Netzwerk zum Erfahrungs- und Wissensaustausch geschaffen wird. Mit dem übergeordneten Ziel die Qualität der Forschung zu verbessern und nachhaltig und ressourcenschonend zu agieren übernimmt das Koordinationsprojekt unter anderem die Aufgaben organisatorische und wissenschaftliche Vernetzung, Öffentlichkeitsarbeit, Organisation des Forschungsarchivs einschließlich Zugriffsakkreditierung
The Sixth Data Release of the Radial Velocity Experiment (RAVE). I. Survey Description, Spectra, and Radial Velocities
No full textThe Radial Velocity Experiment (Rave) is a magnitude-limited (9 < I < 12) spectroscopic survey of Galactic stars randomly selected in Earth's southern hemisphere. The Rave medium-resolution spectra (R ∼ 7500) cover the Ca-triplet region (8410-8795 Å). The sixth and final data release (DR6) is based on 518,387 observations of 451,783 unique stars. Rave observations were taken between 2003 April 12 and 2013 April 4. Here we present the genesis, setup, and data reduction of Rave as well as wavelength-calibrated and flux-normalized spectra and error spectra for all observations in Rave DR6. Furthermore, we present derived spectral classification and radial velocities for the Rave targets, complemented by cross-matches with Gaia DR2 and other relevant catalogs. A comparison between internal error estimates, variances derived from stars with more than one observing epoch, and a comparison with radial velocities of Gaia DR2 reveals consistently that 68% of the objects have a velocity accuracy better than 1.4 km s-1,while 95% of the objects have radial velocities better than 4.0 km s-1. Stellar atmospheric parameters, abundances and distances are presented in a subsequent publication. The data can be accessed via the Rave website (http://rave-survey.org) or the Vizier database
Exploring Kinase Asp-Phe-Gly (DFG) Loop Conformational Stability with AlphaFold2-RAVE
No full textKinases compose one of the largest
fractions of the human
proteome,
and their misfunction is implicated in many diseases, in particular,
cancers. The ubiquitousness and structural similarities of kinases
make specific and effective drug design difficult. In particular,
conformational variability due to the evolutionarily conserved Asp-Phe-Gly
(DFG) motif adopting in and out conformations and the relative stabilities
thereof are key in structure-based drug design for ATP competitive
drugs. These relative conformational stabilities are extremely sensitive
to small changes in sequence and provide an important problem for
sampling method development. Since the invention of AlphaFold2, the
world of structure-based drug design has noticeably changed. In spite
of it being limited to crystal-like structure prediction, several
methods have also leveraged its underlying architecture to improve
dynamics and enhanced sampling of conformational ensembles, including
AlphaFold2-RAVE. Here, we extend AlphaFold2-RAVE and apply it to a
set of kinases: the wild type DDR1 sequence and three mutants with
single point mutations that are known to behave drastically differently.
We show that AlphaFold2-RAVE is able to efficiently recover the changes
in relative stability using transferable learned order parameters
and potentials, thereby supplementing AlphaFold2 as a tool for exploration
of Boltzmann-weighted protein conformations (Meller, A.; Bhakat, S.;
Solieva, S.; Bowman, G. R. Accelerating Cryptic Pocket Discovery Using
AlphaFold. J. Chem. Theory Comput. 2023, 19, 4355–4363)
RAVE stars in K2: I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1
No full textWe present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This data set provides a useful benchmark for testing the gravities provided in RAVE data release 4 (DR4), and is key for the calibration of the RAVE data release 5 (DR5). The RAVE survey collected medium-resolution spectra (R = 7500) centred in the Ca II triplet(8600 Å) wavelength interval, which although being very useful for determining radial velocity and metallicity, even at low S/N, is known be affected by a log (g)-Teff degeneracy. This degeneracy is the cause of the large spread in the RAVE DR4 gravities for giants. The understanding of the trends and offsets that affects RAVE atmospheric parameters, and in particular log (g), is a crucial step in obtaining not only improved abundance measurements, but also improved distances and ages. In the present work, we use two different pipelines, GAUFRE and Sp-Ace, to determine atmospheric parameters and abundances by fixing log (g) to the seismic one. Our strategy ensures highly consistent values among all stellar parameters, leading to more accurate chemical abundances. A comparison of the chemical abundances obtained here with and without the use of seismic log (g) information has shown that an underestimated (overestimated) gravity leads to an underestimated (overestimated) elemental abundance (e.g. [Mg/H] is underestimated by ∼0.25 dex when the gravity is underestimated by 0.5 dex). We then perform a comparison between the seismic gravities and the spectroscopic gravities presented in the RAVE DR4 catalogue, extracting a calibration for log (g) of RAVE giants in the colour interval 0.50 < (J-KS) < 0.85. Finally, we show a comparison of the distances, temperatures, extinctions (and ages) derived here for our RAVE K2-C1 sample with those derived in RAVE DR4 and DR5. DR5 performs better than DR4 thanks to the seismic calibration, although discrepancies can still be important for objects for which the difference between DR4/DR5 and seismic gravities differ by more than ∼0.5 dex. The method illustrated in this work will be used for analysing RAVE targets present in the other K2 campaigns, in the framework of Galactic Archaeology investigations
Rave transition: memories of Zagreb scene in 1990's
No full textOvaj rad opisuje prvenstveno duh rave scene koja je ušla na velika vrata u Zagreb početkom devedesetih godina. Nudi se povijesni pregled i pozadina rave supkulture; fokus rada je na glazbenim pravcima, plesu kao sastavnom dijelu scene i načinu ekspresije. U radu se prikazuju zaključci etnografskog istraživanja (osobno sudjelovanje s promatranjem) u kombinaciji s intervjuima osoba koje posjećuju rave partije. Cilj rada je prikazati promjene unutar scene nakon procesa tranzicije i pružiti nova saznanja o zagrebačkoj undergound sceni.This thesis primarily describes the spirit of the scene that made a great entrance in Zagreb in the early 1990s. It provides a historical overview and background of rave subculture; the main focus is on music subgenres and dance as an integral part of the subculture and the way of expression. This thesis presents conclusions of ethnographic research combined with interviews with people that are involved in party scene. The aim of the thesis is to show overall process within the scene after the transition and to provide new insights into the underground scene in Zagreb
The Radial Velocity Experiment (RAVE): First data release
No full textWe present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity, and surface gravity) of up to one million stars using the Six Degree Field multiobject spectrograph on the 1.2 m UK Schmidt Telescope of the Anglo-Australian Observatory. The RAVE program started in 2003, obtaining medium-resolution spectra (median R = 7500) in the Ca-triplet region (8410-8795 Å) for southern hemisphere stars drawn from the Tycho-2 and SuperCOSMOS catalogs, in the magnitude range 9 < I < 12. The first data release is described in this paper and contains radial velocities for 24,748 individual stars (25,274 measurements when including reobservations). Those data were obtained on 67 nights between 2003 April 11 and 2004 April 3. The total sky coverage within this data release is ∼4760 deg 2. The average signal-to-noise ratio of the observed spectra is 29.5, and 80% of the radial velocities have uncertainties better than 3.4 km s -1. Combining internal errors and zero-point errors, the mode is found to be 2 km s -1. Repeat observations are used to assess the stability of our radial velocity solution, resulting in a variance of 2.8 km s -1. We demonstrate that the radial velocities derived for the first data set do not show any systematic trend with color or signal-to-noise ratio. The RAVE radial velocities are complemented in the data release with proper motions from Starnet 2.0, Tycho-2, and SuperCOSMOS, in addition to photometric data from the major optical and infrared catalogs (Tycho-2, USNO-B, DENIS, and the Two Micron All Sky Survey). The data release can be accessed via the RAVE Web site. © 2006. The American Astronomical Society. All rights reserved
Rave subkultura in zagonetna devetdeseta
No full textRave gibanje je za družboslovce, ki jih zanimajo fenomeni popularne kulture, zanimivo vsaj iz dveh razlogov. Prvič, pojavilo se je v trenutku, ko se je zdelo, da je velikih subkulturnih zgodb za vselej konec in s tem postavilo na glavo številna razmišljanja o sami naravi subkulturnih dogajanj, in drugič, rave kot pojav, vezan na mlado, s preteklostjo neobremenjeno, generacijo odpira zanimive možnosti za uvid v nekatere morda bistvene zančilnosti sodobnega sveta, ki se nam v toku naših vsakdanjih življenj modra ne kažejo zelo jasno. Avtor poskuša v članku razmišljati v obeh nakazanih smereh. Najprej umestiti rave kulturo v tradicijo preučevanja mladinskih subkultur, kjer opozori, da bi bilo plodneje poskušati razumeti kritičnost subkulturnih vsebin skozi perspektivo Webrovega svarila o iracionalnosti racionalizacije, kot vztrajati na angleški (neo)marksistični poziciji z njenim enostranskim poudarkom na problemu emancipacije podrejenih. Temu sledi pregleden opis fenomena rave zabave in glasbe same, svoje pisanje pa avtor zaokroži s kritičnim razmišljanjem o vprašanju, kaj nam lahko pove rave o svetu v katerem živimo
Mixed messages: resistance and reappropriation in rave culture
No full textBrian Ott was a professor in the Department of Speech Communication at Colorado State University.Includes bibliographical references (pages 268-270).This essay concerns the dynamic tension between resistance and reappropriation in the youth subcultural practice of raving. We argue that the transgressive potential of underground rave culture lies primarily in its privileging of communion, which is facilitated along the intersecting axes of social space, authorship, the body, and the drug Ecstasy. The commodification of rave culture is demonstrated to be linked to a shifting consciousness reflected in changing attitudes toward Ecstasy, the relocation of dance culture into clubs, and the redefinition of the DJ as artist and superstar. A concluding section considers the implications of resistance and reappropriation in rave culture for social change and the exercise of power
RAVE stars in K2: I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1
No full textWe present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This data set provides a useful benchmark for testing the gravities provided in RAVE data release 4 (DR4), and is key for the calibration of the RAVE data release 5 (DR5). The RAVE survey collected medium-resolution spectra (R = 7500) centred in the Ca II triplet(8600 Å) wavelength interval, which although being very useful for determining radial velocity and metallicity, even at low S/N, is known be affected by a log (g)-Teff degeneracy. This degeneracy is the cause of the large spread in the RAVE DR4 gravities for giants. The understanding of the trends and offsets that affects RAVE atmospheric parameters, and in particular log (g), is a crucial step in obtaining not only improved abundance measurements, but also improved distances and ages. In the present work, we use two different pipelines, GAUFRE and Sp-Ace, to determine atmospheric parameters and abundances by fixing log (g) to the seismic one. Our strategy ensures highly consistent values among all stellar parameters, leading to more accurate chemical abundances. A comparison of the chemical abundances obtained here with and without the use of seismic log (g) information has shown that an underestimated (overestimated) gravity leads to an underestimated (overestimated) elemental abundance (e.g. [Mg/H] is underestimated by ∼0.25 dex when the gravity is underestimated by 0.5 dex). We then perform a comparison between the seismic gravities and the spectroscopic gravities presented in the RAVE DR4 catalogue, extracting a calibration for log (g) of RAVE giants in the colour interval 0.50 < (J-KS) < 0.85. Finally, we show a comparison of the distances, temperatures, extinctions (and ages) derived here for our RAVE K2-C1 sample with those derived in RAVE DR4 and DR5. DR5 performs better than DR4 thanks to the seismic calibration, although discrepancies can still be important for objects for which the difference between DR4/DR5 and seismic gravities differ by more than ∼0.5 dex. The method illustrated in this work will be used for analysing RAVE targets present in the other K2 campaigns, in the framework of Galactic Archaeology investigations
Thomas Adés’s ‘Freaky, Funky Rave’.
No full textThe reception of "Asyla" since its premiere in 1997 by Sir Simon Rattle and the CBSO has been staggering. Instantly hailed as a classic, "Asyla" won the 1997 Royal Philharmonic Society Award for Large-Scale Composition. Simon Rattle included "Asyla" in his farewell concert with the CBSO in 1998, and introduced it to Berlin audiences in his first concert as principal conductor of the Berlin Philharmoniker (2001). An internationally-acclaimed recording made of the work was nominated for the 1999 Mercury Music Prize, and in 2000, Adès became the youngest composer (and only the third British compser) to win the Grawemeyer prize, for "Asyla". "Ecstasio", the third movement of the work, draws heavily on gestures and forms of rave music in a manner analogous to the use of contemporary dance genres in the Romantic scherzo. Although not the first orchestral work to include material derived from rave music, "Asyla"’s spectacular history means that it is almost certainly the most prominent. The relative novelty of the rave idiom in the symphonic repertoire has resulted in early critics of the work focussing their attention on the unusual gestures and forms that are alluded to in "Ecstasio". The resulting emphasis on the social, political and physical implications of rave music promotes an oversimplified picture of the movement; no mention is made of those symphonic processes that comment on, conflict with, and ultimately compromise the projected ‘rave voice’. In this paper I will show how the elements that are used to signify the rave voice in "Ecstasio" are created, combined and eventually nullified by more traditional symphonic elements. The resulting dysphoric narrative questions and contradicts early readings of the movement, suggesting instead an ambiguous yet probing artistic position towards rave music
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