1,847,316 research outputs found
Analisi spettroscopica della prima cometa interstellare 2I/Borisov
No full textLa scoperta del passaggio di oggetti interstellari attraverso il Sistema
Solare ci permette di poter studiare processi chimici e fisici in corpi sconosciuti. Lo studio di questi corpi permette anche di investigare le condizioni di formazione
nel loro luogo d'origine e di formulare ipotesi sui processi che hanno portato alla loro dispersione nel mezzo interstellare. 2I/Borisov è la prima cometa interstellare
ad essere stata osservata. Scoperta il 30 Agosto 2019 da Gennady Borisov, questa cometa è già stata oggetto di numerosi studi che ne hanno delineato delle prime proprietà. Lo scopo di
questa tesi è quello d fornire un'analisi spettroscopica preliminaredi 2I/Borisov e di sperimentare alcune tecniche di riduzione degli spettri. Nel capitolo 1 vengono descritte le proprietà fisiche e chimiche finora conosciute delle comete appartenenti al Sistema Solare. Vengono descritte anche le varie classificazioni dinamiche. Nel capitolo 2 si riassumono le principali scoperte sulla cometa interstellare 2I/Borisov, già pubblicate in numerosi articoli. Nel terzo capitolo si descrivono i passaggi effettuati nell'analisi spettroscopica che portano ad una discussione finale dei risultati.ope
GUEST ARTIST RECITAL ROBERTA RUST, Piano Thursday, January 24, 1991 8:00 p.m. in Hamman Hall
No full textPresented as part of the All-Prokofiev Program in Honor of the 1991 Prokofiev CentenaryRecording ends on Side A before performance finishes.Program: Sonata no. 1 in F minor, op. 1, Sergey Prokofiev (1891-1953) -- Romeo and Juliet (excerpts), Sergey Prokofiev (1891-1953) -- Suggestion diabolique, op. 4, no. 4, Sergey Prokofiev (1891-1953) -- Sonata no. 9 in C major, op. 103, Sergey Prokofiev (1891-1953) -- Visions fugitives: nos. 2, 16, 11, 7 6, 17, Sergey Prokofiev (1891-1953) -- Sonata no. 7 in B♭ major, op. 83, Sergey Prokofiev (1891-1953)
The fireman’s ball in Bulgaria? A comparison between Sergey Stanishev and Boyko Borisov
No full textThis chapter analyzes the case of Bulgaria by comparing the leaderships of Sergey Stanishev, leader of the major center-left Bulgarian Socialist Party (2001–2014), and Boyko Borisov, leader of the main center-right party, Citizens for European Development of Bulgaria (2010 onwards). The study shows that their personality traits have a noticeable negative impact on the electoral support, internal party cohesion and activity, especially in periods when these leaders concentrated power around themselves. In contrast, it was the times when both leaders shared internal and/or external authority that were of major electoral and organizational benefit for the two parties. Furthermore, this chapter shows that the impact of the leaders’ personality traits could not be understood without analyzing also their roles as officeholders. In Stanishev’s and Borisov’s cases their positions as prime ministers and leaders of the opposition illuminated their personality weaknesses and had significant effects for their parties
The class of the affine line is a zero divisor in the Grothendieck ring
No full textWe show that the class of the affine line is a zero divisor in the Grothendieck ring of algebraic varieties over complex numbers. The argument is based on the Pfaffian-Grassmannian double mirror correspondence.Peer reviewe
Supplementary Data for Modeling and Conservation of Wildlife Populations in Managed Landscapes: A Trade-Off Between Effort and Results, Ph.D. Dissertation
No full textThe two files contain excerpts of codes written in Program R (Version 3.1.1) to determine the accuracy and precision of statistical population reconstruction (Chapter 4) and to explore the effectiveness of localized management on the spread of chronic wasting disease (Chapter 5). The files can be opened by any text editors. To run the codes, R environment is required.The data included here are supplemental R codes associated with the dissertation "Modeling and Conservation of Wildlife Populations in Managed Landscapes: A Trade-Off Between Effort and Results" by Sergey S. Berg. The dissertation explores the trade-off between effort and the validity or impact of results in a variety of ecological systems. The data are being released with the publication of the dissertation.Berg, Sergey S.. (2016). Supplementary Data for Modeling and Conservation of Wildlife Populations in Managed Landscapes: A Trade-Off Between Effort and Results, Ph.D. Dissertation. Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D6S59P
CV Sergey González-Mejía
No full textThe curriculum vitae of Sergey González-Mejía, contains information about academic education and experience as a professor researcher, and professional, and also includes the distinctions awarded
Unusual polarimetric properties for interstellar comet 2I/Borisov
No full textSo far, only two interstellar objects have been observed within our Solar System. While the first one, 1I/‘Oumuamua, had asteroidal characteristics, the second one, 2I/Borisov, showed clear evidence of cometary activity. We performed polarimetric observations of comet 2I/Borisov using the European Southern Observatory Very Large Telescope to derive the physical characteristics of its coma dust particles. Here we show that the polarization of 2I/Borisov is higher than what is typically measured for Solar System comets. This feature distinguishes 2I/Borisov from dynamically evolved objects such as Jupiter-family and all short- and long-period comets in our Solar System. The only object with similar polarimetric properties as 2I/Borisov is comet C/1995 O1 (Hale-Bopp), an object that is believed to have approached the Sun only once before its apparition in 1997. Unlike Hale-Bopp and many other comets, though, comet 2I/Borisov shows a polarimetrically homogeneous coma, suggesting that it is an even more pristine object.This work is based on observations made with ESO Telescopes at the La Silla Paranal Observatory thanks to Director Discretionary Time under programme ID 2104.C-5003. The work of T.S.-R. was carried out through grant APOSTD/2019/046 by Generalitat Valenciana (Spain). This work was supported by the MINECO (Spanish Ministry of Economy) through grant RTI2018-095076-B-C21 (MINECO/FEDER, UE)
A JOURNEY FROM THE OCTONIONIC P2 TO A FAKE P2
No full textWe discover a family of surfaces of general type with K2 = 3 and pg = q = 0 as free C13 quotients of special linear cuts of the octonionic projective plane OP2. A special member of the family has 3 singularities of type A2, and is a quotient of a fake projective plane. We use the techniques of earlier work of Borisov and Fatighenti to define this fake projective plane by explicit equations in its bicanonical embedding
A journey from the octonionic P2 to a fake P2
No full textWe discover a family of surfaces of general type with K2=3
and pg=q=0 as free C13 quotients of special linear cuts of the octonionic projective plane OP2. A special member of the family has
3 singularities of type A2, and is a quotient of a fake projective plane. We use the techniques of earlier work of Borisov and Fatighenti to define this fake projective plane by explicit equations in its bicanonical embedding
Professor Aleksandr Evgenevich Borisov (on the 70th anniversary of the birth).
No full textAlexander Evgenievich Borisov – head of the Department of surgery named after N. D. Monastyrskii (Available at: https://www.livelib.ru/author/733938/series-aleksandr-borisov
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