520 research outputs found
A multi-lepton search for new physics in 35pb⁻¹ proton-proton collisions at the LHC for a center of mass energy of √s = 7 TeV using the CMS detector
No full textThis thesis describes a model independent search for new physics with a decay signature of three or more leptons and missing transverse energy in 35pb⁻¹ of proton-proton collisions at the LHC at a center mass energy √s = 7 TeV using the CMS detector. Standard Model backgrounds are predicted using both simulations and collision data. The observed events are consistent with the Standard Model predictions. The results are interpreted using various supersymmetric models: gravity mediated symmetry breaking, gauge mediated symmetry breaking with slepton co-NLSP, and leptonic R-parity violating.Ph. D.Includes bibliographical referencesby Dmitry Hit
Outstanding Surgeon and Scientist Dmitry Alekseevich Arapov
No full textIn 2022, we are approaching 125 years since the birth of Dmitry Alekseevich Arapov, a prominent domestic surgeon, scientist, experimenter, organizer of the military medical services. Dmitry A. Arapov, one of the most prominent representatives of the S.S. Yudin scientific school, worked at the N.V. Sklifosovsky Research Institute for Emergency Medicine from 1929 till 1984. He quickly proved himself not only as an excellent doctor and a skilled surgeon, but also as a researcher, and soon became one of the closest students and associates of S.S. Yudin. Dmitry A. Arapov drafted as a field surgeon during the Soviet-Finnish war of 1939-1940, from the first to the last day he went through the Great Patriotic War, being the Head of the surgical service of the Northern Fleet in Polyarny. In this position, he significantly improved the system for providing emergency surgical care on ships and in naval hospitals, based on the experience gained over the years of work at the N.V. Sklifosovsky Research Institute for Emergency Medicine. From July 1950 Dmitry A. Arapov was Chief Surgeon of the USSR Navy, from May 1953 he was Deputy Chief surgeon of the Main Military Sanitary Directorate of the USSR Ministry of Defense, and from May 1955 again Chief Surgeon of the USSR Navy, until his retirement in October, 1968. At the same time, Dmitry A. Arapov did not leave his work at the N.V. Sklifosovsky Research Institute for Emergency Medicine until the last days of his life. Dmitry A. Arapov is the author of more than 200 research papers, including 14 monographs. Scientific interests of Dmitry A. Arapov went far beyond emergency surgery, to which he naturally paid most attention. His works are devoted to various issues of military and emergency surgery of the abdominal and thoracic organs, topical issues of burn injuries, surgical site infections, reconstructive surgery, neurosurgery, treatment of endocrine disorders, and anesthesiology and resuscitation. Also Dmitry A. Arapov successfully dealt with the problems of autotransfusion, blood reinfusion from the chest and abdomen, transfusion of fibrinolytic blood. The main directions of scientific research, laid down by Dmitry A. Arapov, are currently being continued at the Scientific Department of Emergency Surgery, Endoscopy and Intensive Care of the N.V. Sklifosovsky Research Institute for Emergency Medicine. Memory of Dmitry A. Arapov has been preserved to this day. To the 100th anniversary of the birth of D.A. Arapov, a scientific conference was held at our Institute. The naval hospital in the town of Polyarny, Murmansk region, was named after Dmitry A. Arapov, and in honor of D.A. Arapov, a memorial plaque was installed on its building. In the 70s of the twentieth century, People’s Artist of the USSR L.E. Kerbel created a sculpture of Dmitry A. Arapov, which was stored in the local history museum of the town of Polyarny. His bust portrait (by artist T.S. Smagina) is exhibited at the Scientific Department of Emergency Surgery, Endoscopy and Intensive Care of the N.V. Sklifosovsky Research Institute for Emergency Medicine. In addition, the N.V. Sklifosovsky Research Institute for Emergency Medicine owns an earlier portrait of Dmitry A. Arapov by artist F.S. Bulgak. We introduce these portraits into scientific circulation for the first time. We are confident that they will be able to tell contemporaries a lot about this scientist, surgeon and man who made a great contribution to surgery and military medicine, and rightfully entered the history of Russian medicine
Student Years of Dmitry Mushketov at St. Petersburg Mining Institute
No full textСтатья посвящена годам обучения в Горном институте в Петербурге выдающегося ученого-геолога СССР Дмитрия Ивановича Мушкетова, будущего ректора этого института (1918-1926). Раскрыіваются программа обучения, успехи в ее освоении, круг преподавателей, летние геологические практики, первые научные работы, написанные по их материалам.The article focuses on student years of the outstanding Soviet scientist and geologist Dmitry Mushketov (1918-1926), who later became the rector of St.Petersburg Mining Institute. The author gives an overview of the Institute’s curriculum and Dmitry Mushketov’s educational trajectory and describes the impact that his mentors had on his development as a scientist
Cooling rates of neutron stars and the young neutron star in the Cassiopeia A supernova remnant
No full textWe explore the thermal state of the neutron star in the Cassiopeia A supernova remnant using the recent result of Ho & Heinke that the thermal radiation of this star is well described by a carbon atmosphere model and the emission comes from the entire stellar surface. Starting from neutron star cooling theory, we formulate a robust method to extract neutrino cooling rates of thermally relaxed stars at the neutrino cooling stage from observations of thermal surface radiation. We show how to compare these rates with the rates of standard candles – stars with non-superfluid nucleon cores cooling slowly via the modified Urca process. We find that the internal temperature of standard candles is a well-defined function of the stellar compactness parameter x=rg/R, irrespective of the equation of state of neutron star matter (R and rg are circumferential and gravitational radii, respectively). We demonstrate that the data on the Cassiopeia A neutron star can be explained in terms of three parameters: f?, the neutrino cooling efficiency with respect to the standard candle; the compactness x; and the amount of light elements in the heat-blanketing envelope. For an ordinary (iron) heat-blanketing envelope or a low-mass (? 10?13 M?) carbon envelope, we find the efficiency f?? 1 (standard cooling) for x? 0.5 and f?? 0.02 (slower cooling) for a maximum compactness x? 0.7. A heat blanket containing the maximum mass (?10?8 M?) of light elements increases f? by a factor of 50. We also examine the (unlikely) possibility that the star is still thermally non-relaxe
Author response
No full textThe DEAH-box NTPase Prp43 and its cofactors Ntr1 and Ntr2 form the NTR complex and are required for disassembling intron-lariat spliceosomes (ILS) and defective earlier spliceosomes. However, the Prp43 binding site in the spliceosome and its target(s) are unknown. We show that Prp43 fused to Ntr1's G-patch motif (Prp43_Ntr1GP) is as efficient as the NTR in ILS disassembly, yielding identical dissociation products and recognizing its natural ILS target even in the absence of Ntr1's C-terminal-domain (CTD) and Ntr2. Unlike the NTR, Prp43_Ntr1GP disassembles earlier spliceosomal complexes (A, B, B(act)), indicating that Ntr2/Ntr1-CTD prevents NTR from disrupting properly assembled spliceosomes other than the ILS. The U2 snRNP-intron interaction is disrupted in all complexes by Prp43_Ntr1GP, and in the spliceosome contacts U2 proteins and the pre-mRNA, indicating that the U2 snRNP-intron interaction is Prp43's major target
The image of Dmitry Zhilunovich in the 20th century Belarusian literature: conceptual level and poetics
No full textThe author of the article discusses an individual strategy of presenting the image of Dmitry Zhilunovich in the 20th century Belarusian literature (based on a documentary novel “Without an epitaph”). The picture is created by a system of artistic devices which depend on the features of the selected genres. Quotations of archival material, historians’ opinions, friends’ and relatives’ comments and memories built an elementary layer of the text of a documentary.Nalotowa Natalla (Налëтава Наталля) – magister nauk filologicznych, doktorantka Katedry Literatury Białoruskiej, Witebski Państwowy Uniwersyt im. P. M. Maszerawa.Witebski Państwowy Uniwersytet im. P. M. MaszerawaÂlugìn È., Bez èpìtafìì: dakumental’naâ apovesc’, Mìnsk 1989 [Ялугiн Э. В., Без эпiтафii: дакументальная аповесць, Мiнск 1989].Elìseeŭ A., Zmìcer Žylunovìč: palìtyk, tvorca, čalavek, “Belaruskaâ dumka” 2019, № 2 [Елiсееў А. Б, Змiцер Жылуновiч: палiтык, творца, чалавек, “Беларуская думка” 2019, № 2].Gulyga A., Èstetika istorii, Moskva 1974 [Гулыга А. В., Эстетика истории, Москва 1974].Hodzìn S. M., Kul’tura belaruskaga naroda, Mìnsk 1997 [Ходзiн С. М., Культура беларускага народа, Мiнск 1997.1131131
Robert Burns in the perception of the soviet writer Afanasy Koptelov
No full textAn essay of the Soviet novelist, researcher of Mountainous Altai, Afanasy Lazarevich Koptelov, about the life and work of Robert Burns, published on the pages of the Siberian journal «Siberian Lights» in 1959 is firstly systematized and comprehended in the article. The essay, written on the occasion of the 200th anniversary of the birth of Robert Burns, presents the writer’s impressions after a trip to Scotland, the birthplace of the great poet. Describing the nature of mountain landscapes, scenery of numerous lakes, forests and fields flashing outside the window that once inspired R. Burns to create amazing examples of Scottish poetry, the author of the article focuses on the unfair division of land between the citizens of one state, regrets that nothing has changed since the days when the Scottish bard himself wrote about hard farming activities and endless financial dependence on wealthy landowners. A.L. Koptelov focuses in the article on the universal recognition of the art of the Scottish poet, a fighter for freedom and justice, the rights of workers and peasants oppressed by hard work, gives information about the numerous architectural monuments and museums dedicated to the creativity of Robert Burns, in his homeland, in Scotland, the question of the genre diversity of the work of the «bard of Caledonia» is revealed, some testimonies of contemporaries about the «second life» of the works of R. Burns in Russia are given, which became possible due to the talented interpretations of S. Y. Marshak
Corrigendum to ‘Cu-substituted La2NiO4+δ as oxygen electrodes for protonic ceramic electrochemical cells’ [Ceram. Int.](S0272884219312362)(10.1016/j.ceramint.2019.05.127)
No full textThe authors regret that in the published version of this article the middle initial of the author Dmitry Medvedev was shown as ‘M’ instead of ‘A’. The author name is shown correctly as Dmitry A. Medvedev above. The authors would like to apologise for any inconvenience caused. © 2019 Elsevier Ltd and Techna Group S.r.l
Geotechnical consulting at the stages of design and full repair: A case study of village school in Minusinsk region, Russia
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