Showing papers by "Tomsk Polytechnic University published in 2016"
Perimeter Institute for Theoretical Physics1, Niigata University2, CERN3, University of Connecticut4, Leiden University5, Korea Astronomy and Space Science Institute6, Federico Santa María Technical University7, University of California, Santa Barbara8, University of Maryland, College Park9, Claude Bernard University Lyon 110, University of Lyon11, Northwestern University12, University of Victoria13, University of Manchester14, University of Bonn15, Technische Universität München16, École Polytechnique Fédérale de Lausanne17, Stony Brook University18, Autonomous University of Madrid19, Centre national de la recherche scientifique20, University of Paris21, Moscow Institute of Physics and Technology22, Autonomous University of Barcelona23, University of Copenhagen24, Université libre de Bruxelles25, University of La Serena26, University of Valencia27, Taras Shevchenko National University of Kyiv28, Heidelberg University29, Yonsei University30, Princeton University31, Harvard University32, University of Geneva33, University of Tübingen34, Tomsk State University35, Tomsk Polytechnic University36, University of Washington37, University of Florida38, University of Hamburg39, TRIUMF40, University of Iowa41, University of Grenoble42, International Centre for Theoretical Physics43, Hokkai Gakuen University44, University of Illinois at Urbana–Champaign45, Durham University46, University of Melbourne47, University of Naples Federico II48, York University49, Lawrence Berkeley National Laboratory50, University of California, Berkeley51
TL;DR: It is demonstrated that the SHiP experiment has a unique potential to discover new physics and can directly probe a number of solutions of beyond the standard model puzzles, such as neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation.
Abstract: This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (search for hidden particles) experiment is intended to hunt for new physics in the largely unexplored domain of very weakly interacting particles with masses below the Fermi scale, inaccessible to the LHC experiments, and to study tau neutrino physics. The same proton beam setup can be used later to look for decays of tau-leptons with lepton flavour number non-conservation, $\tau \to 3\mu $ and to search for weakly-interacting sub-GeV dark matter candidates. We discuss the evidence for physics beyond the standard model and describe interactions between new particles and four different portals—scalars, vectors, fermions or axion-like particles. We discuss motivations for different models, manifesting themselves via these interactions, and how they can be probed with the SHiP experiment and present several case studies. The prospects to search for relatively light SUSY and composite particles at SHiP are also discussed. We demonstrate that the SHiP experiment has a unique potential to discover new physics and can directly probe a number of solutions of beyond the standard model puzzles, such as neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation.
842 citations
University of Paris1, Université Paris-Saclay2, Pierre-and-Marie-Curie University3, University of Reims Champagne-Ardenne4, College of William & Mary5, Centre national de la recherche scientifique6, California Institute of Technology7, University of Grenoble8, University of Paris-Sud9, University College London10, Université catholique de Louvain11, university of lille12, University of Massachusetts Lowell13, University of Leicester14, University of Science and Technology of China15, University of Castilla–La Mancha16, Russian Academy of Sciences17, University of Colorado Boulder18, Tomsk Polytechnic University19, University of Cologne20, University of Oslo21, Karlsruhe Institute of Technology22, University of Lethbridge23, University College Cork24, Université libre de Bruxelles25
TL;DR: The GEISA database (Gestion et Etude des Informations Spectroscopiques Atmospheriques: Management and Study of Atmospheric Spectroscopic Information) has been developed and maintained by the ARA/ABC(t) group at LMD since 1974.
347 citations
TL;DR: An up-to-date literature overview on relevant approaches for controlling circuital characteristics and radiation properties of dielectric resonator antennas (DRAs) is presented in this paper.
Abstract: An up-to-date literature overview on relevant approaches for controlling circuital characteristics and radiation properties of dielectric resonator antennas (DRAs) is presented The main advantages of DRAs are discussed in detail, while reviewing the most effective techniques for antenna feeding as well as for size reduction Furthermore, advanced design solutions for enhancing the realized gain of individual DRAs are investigated In this way, guidance is provided to radio frequency (RF) front-end designers in the selection of different antenna topologies useful to achieve the required antenna performance in terms of frequency response, gain, and polarization Particular attention is put in the analysis of the progress which is being made in the application of DRA technology at millimeter-wave frequencies
194 citations
TL;DR: In this paper, a mathematical model of MHD free convection in an inclined wavy enclosure filled with a Cu-water nanofluid in the presence of an isothermal corner heater has been carried out.
179 citations
TL;DR: A review of metal-organic polyhedra self-assembly can be found in this article, where the authors focus on each and every application with various unprecedented examples and highlight few challenges still need to be addressed.
179 citations
TL;DR: In this article, a two-dimensional numerical model was developed to simulate the evolution of grain structure observed during the laser additive manufacturing process, where a cellular automata method was used to describe grain growth and the Goldak heat source model was adopted to calculate the heat input during laser melting.
165 citations
TL;DR: In this paper, a numerical investigation is performed on the unsteady natural convection of water-based nanofluid within a wavy-walled cavity under the influence of a uniform inclined magnetic field using the mathematical nano-fluid model proposed by Buongiorno.
Abstract: A numerical investigation is performed on the unsteady natural convection of water based nanofluid within a wavy-walled cavity under the influence of a uniform inclined magnetic field using the mathematical nanofluid model proposed by Buongiorno. The left vertical wavy and right vertical flat walls of the cavity are kept at constant but different temperatures whereas the top and bottom horizontal walls are adiabatic. All boundaries are assumed to be impermeable to the base fluid and nanoparticles. The mathematical model formulated in dimensionless stream function, vorticity and temperature variables is solved using implicit finite difference schemes of the second order. The governing parameters are the Hartmann number, undulation number, wavy contraction ratio, inclination angle of the magnetic field relative to the gravity vector and dimensionless time. The effects of these parameters on the average Nusselt number along the hot wavy wall, as well as on the streamlines, isotherms and isoconcentrations are analyzed.
141 citations
TL;DR: Flow of a spatially coherent, in some regions >1-km thick, central Arctic Ocean ice shelf dated to marine isotope stage 6 is revealed, resurrecting the concept of an ice shelf extending over the entire central Arctic ocean during at least one previous ice age.
Abstract: The hypothesis of a km-thick ice shelf covering the entire Arctic Ocean during peak glacial conditions was proposed nearly half a century ago. Floating ice shelves preserve few direct traces after their disappearance, making reconstructions difficult. Seafloor imprints of ice shelves should, however, exist where ice grounded along their flow paths. Here we present new evidence of ice-shelf groundings on bathymetric highs in the central Arctic Ocean, resurrecting the concept of an ice shelf extending over the entire central Arctic Ocean during at least one previous ice age. New and previously mapped glacial landforms together reveal flow of a spatially coherent, in some regions >1-km thick, central Arctic Ocean ice shelf dated to marine isotope stage 6 (∼ 140 ka). Bathymetric highs were likely critical in the ice-shelf development by acting as pinning points where stabilizing ice rises formed, thereby providing sufficient back stress to allow ice shelf thickening.
140 citations
TL;DR: In this article, a numerical analysis of MHD natural convection in a wavy open porous tall cavity filled with a Cu-water nanofluid in the presence of an isothermal corner heater has been carried out.
140 citations
TL;DR: In this paper, measurements of seawater chemistry reveal that the extreme acidity of the East Siberian Arctic Shelf is driven by terrestrial organic matter and freshwater inputs, which contributes to ocean acidification.
Abstract: Uptake of atmospheric CO2 contributes to ocean acidification. Measurements of seawater chemistry reveal that the extreme acidity of the East Siberian Arctic Shelf is driven by terrestrial organic matter and freshwater inputs.
133 citations
TL;DR: In this article, the authors studied free convection in an inclined wavy open porous cavity filled with a nanofluid under an influence of the uniform magnetic field in the presence of right bottom corner heater of the constant temperature.
TL;DR: In this article, the authors provide a concise review of composite NDT using TNDT in combination with other inspection techniques, providing an opportunity for data fusion, especially for composite materials.
Abstract: Thermal nondestructive testing (TNDT) may be considered to be a more widely applicable method than many traditional techniques, such as X ray, ultrasonic, eddy current, liquid penetrant, etc. It can be applied to both metals and non-metals containing subsurface defects such as cracks, foreign inclusions, disbonds, delaminations, variations in thermal properties, etc. This is especially true for composite materials, and TNDT is very appropriate for screening purposes. TNDT test results may be analyzed by advanced image processing algorithms. This paper provides a concise review of composite NDT using TNDT in combination with other inspection techniques, providing an opportunity for data fusion.
TL;DR: In this article, a nanoparticle formation mechanism caused by the coagulation of the primary particles generated in the early stages of the electrical explosion of the wires has been proposed, and the as-prepared samples were characterized by transmission electron microscopy, energy dispersive X-ray microanalysis, Xray diffraction and Brunauer-Emmett-Teller specific surface area measurements.
TL;DR: Though the ability of silver nanoparticles to control an ongoing RVFV infection in the conditions tested was limited, the incubation of virus with Argovit before the infection led to a reduction of the infectivity titers both in vitro and in vivo.
TL;DR: A survey and discussion of N-heterocyclic carbene precursor-containing MOFs and their various applications are provided in this paper, where the carbenic carbon in Nhetercycleclic carbenes enhances the potential of MOFs synthesized from azolium-containing linkers.
TL;DR: In this paper, a numerical study of a partially open trapezoidal cavity filled with a CuO nanofluid under the effect of uniform magnetic field of various orientations has been carried out.
TL;DR: In this paper, the main physicochemical coefficients of the components and of the tested coal-water slurry containing petrochemicals (CWSP) have been collected, and the viscosity, mixture stability, density, ash content, humidity, flash and ignition temperatures, and enthalpy of combustion of tested CWSP are reported.
Abstract: The main physicochemical coefficients of the components and of the tested coal–water slurry containing petrochemicals (CWSP) have been collected. The viscosity, mixture stability, density, ash content, humidity, flash and ignition temperatures, and enthalpy of combustion of the tested CWSP are reported. The temperatures of combustion of fuel compositions with different concentrations of solid and liquid components have been measured, as well as the important parameters: the ignition time delays of droplets (radius 0.25–2.5 mm) and the times required to reach their complete burning. The study allows determination of the optimal fuel compositions yielding the shortest ignition time delays, the longest times to complete burning, the highest temperatures of combustion, and the maximum enthalpy of combustion. It is found that the viscosity of CWSP is dependent almost proportionally on the moisture content of components. It is shown that the calorific value of CWSP is dependent proportionally on the calorific v...
TL;DR: In this article, the effect of the dimensionless time, thermal dispersion parameter and solid volume fraction parameter of nanoparticles on the fluid flow and heat transfer characteristics of a porous wavy-walled cavity filled with a nanofluid has been studied numerically.
TL;DR: Based on the described principles, new devices can be designed which will be reliable, cheap, and radiation resistant due to the absence of any lumped components.
Abstract: The paper describes the ultra-wideband (UWB) pulse decomposition in simple printed structures aimed at low-cost and effective protection. The structure of an asymmetrical modal filter without resistors is considered, and the possibility of the attenuation by a factor of 55 is shown. Another structure—a turn of a meander line (ML)—is described, and the possibility of the attenuation by a factor of 2.5 is shown. Simulations without and with frequency-dependent losses in conductors and dielectrics are compared with experimental results. Based on the described principles, new devices can be designed which will be reliable, cheap, and radiation resistant due to the absence of any lumped components.
TL;DR: In this paper, the authors synthesize binary metallic nanoparticles by the electrical explosion of two twisted wires from immiscible elements (i.e., Cu/Ag, Сu/Pb, and Al-Pb) and the distribution of metallic components in the nanoparticles depended on the melting temperature, metal density and degree of initial wire superheating.
TL;DR: An experimental study of the macroscopic laws of the ignition of coal-water slurry containing petrochemicals (CWSPs) based on coal and flammable liquids processing waste is presented in this article.
TL;DR: In this article, an improved understanding of how matrix association affects the redistribution and degradation of terrigenous organic carbon (TerrOC) during cross-shelf transport in the Siberian m...
Abstract: This study seeks an improved understanding of how matrix association affects the redistribution and degradation of terrigenous organic carbon (TerrOC) during cross-shelf transport in the Siberian m ...
TL;DR: In this article, an extension of the Starobinsky model, whose parameters are functions of an extra scalar field, is considered and the scalar potential has a flat direction with respect to mixing scalaron with another (matter) scalar fields.
Abstract: We consider an extension of the Starobinsky model, whose parameters are functions of an extra scalar field. Our motivation is to test the robustness (or sensitivity) of the Starobinsky inflation against mixing scalaron with another (matter) scalar field. We find that the extended Starobinsky model is (classically) equivalent to the two-field inflation, with the scalar potential having a flat direction. For the sake of fully explicit calculations, we perform a numerical scan of the parameter space. Our findings support the viability of the Starobinsky-like two-field inflation for a certain range of its parameters, which is characterized by the scalar index $$n_s=0.96\pm 0.01$$
, the tensor-to-scalar ratio $$r<0.06$$
, and a small running of the scalar index at $$|\alpha _s|<0.05$$
.
TL;DR: The results suggest that PF-C may indeed have been an important source of CO2 across the extensive permafrost domain and challenge current paradigms on the post-glacial CO2 rise.
Abstract: Recent hypotheses, based on atmospheric records and models, suggest that permafrost carbon (PF-C) accumulated during the last glaciation may have been an important source for the atmospheric CO2 rise during post-glacial warming. However, direct physical indications for such PF-C release have so far been absent. Here we use the Laptev Sea (Arctic Ocean) as an archive to investigate PF-C destabilization during the last glacial-interglacial period. Our results show evidence for massive supply of PF-C from Siberian soils as a result of severe active layer deepening in response to the warming. Thawing of PF-C must also have brought about an enhanced organic matter respiration and, thus, these findings suggest that PF-C may indeed have been an important source of CO2 across the extensive permafrost domain. The results challenge current paradigms on the post-glacial CO2 rise and, at the same time, serve as a harbinger for possible consequences of the present-day warming of PF-C soils.
TL;DR: The mineralogy of many of the major unconventional hydrocarbon shale reservoirs in the USA, which span practically the whole spectrum of Phanerozoic time, is reviewed from a survey of relevant published literature.
TL;DR: In this article, the authors present an experimental study of the ignition conditions and characteristics of the single droplets of organic coal-water fuels, examining suspension compositions based on low grade coals, typical (with various characteristics of combustion) coal processing wastes (filter cakes obtained after the filtration of crushed coal), waste oils, water-oil emulsions.
TL;DR: Pseudocyclic hypervalent iodine derivatives are characterized by the presence of additional intramolecular non-covalent coordination at the iodine center, which leads to significant alteration of their physical and chemical properties.
Abstract: Hypervalent iodine compounds have found wide practical application as versatile, efficient, and sustainable reagents for organic synthesis. Pseudocyclic hypervalent iodine derivatives are characterized by the presence of additional intramolecular non-covalent coordination at the iodine center, which leads to significant alteration of their physical and chemical properties. In comparison with common hypervalent iodine reagents, these pseudocyclic compounds have higher thermal stability, better solubility, and improved reactivity. In recent years, pseudocyclic hypervalent iodine reagents are increasingly used in organic synthesis as environmentally friendly selective oxidants and electrophiles. Furthermore, numerous enantioselective reactions mediated by chiral pseudocyclic hypervalent iodine species have been recently developed. In the present review, the preparation and structural features of pseudocyclic iodine(III) and iodine(V) derivatives are discussed, and recent developments in their synthetic applications are summarized.
TL;DR: In this article, the authors presented an optimization of a palladium-catalyzed Heck-Matsuda reaction using an optimization algorithm in a multidimensional space and demonstrated the power of their modified algorithm through the optimization of multivariable reaction involving the arylation of a deactivated olefin with an arenediazonium salt.
TL;DR: In this article, the effects of the Rayleigh number, Stefan number, Hartmann number, magnetic field inclination angle and dimensionless time on streamlines, isotherms and Nusselt number at the heat source surface have been analyzed.
TL;DR: This paper describes five theories in relationship to the model of the regulation of reward-seeking vs. misery-avoiding behaviors and suggests that reversal or compensation of these neuroplastic adjustments may explain the effects of biological therapies in treating depression.
Abstract: According to our model of the regulation of appetitive-searching versus distress-avoiding behaviors, the motivation to display these essential conducts is regulated by two parallel cortico-striato-thalamo-cortical, re-entry circuits, including the core and the shell parts of the nucleus accumbens, respectively. An entire series of basal ganglia, running from the caudate nucleus on one side, to the centromedial amygdala on the other side, controls the intensity of these reward-seeking and misery-fleeing behaviors by stimulating the activity of the (pre)frontal and limbic cortices. Hyperactive motivation to display behavior that potentially results in reward induces feelings of hankering (relief leads to pleasure). Hyperactive motivation to exhibit behavior related to avoidance of misery results in dysphoria (relief leads to happiness). These two systems collaborate in a reciprocal fashion. In clinical depression, a mismatch exists between the activities of these two circuits: the balance is shifted to the misery-avoiding side. Five theories have been developed to explain the mechanism of depressive mood disorders, including the monoamine, biorhythm, neuro-endocrine, neuro-immune, and kindling/neuroplasticity theories. This paper describes these theories in relationship to the model (described above) of the regulation of reward-seeking versus misery-avoiding behaviors. Chronic stress that leads to structural changes may induce the mismatch between the two systems. This mismatch leads to lack of pleasure, low energy, and indecisiveness, on one hand, and dysphoria, continuous worrying, and negative expectations on the other hand. The neuroplastic effects of monoamines, cortisol, and cytokines may mediate the induction of these structural alterations. Long-term exposure to stressful situations (particularly experienced during childhood) may lead to increased susceptibility for developing this condition. This hypothesis opens up the possibility of treating depression with psychotherapy. Genetic and other biological factors (toxic, infectious, or traumatic) may increase sensitivity to the induction of relevant neuroplastic changes. Reversal or compensation of these neuroplastic adjustments may explain the effects of biological therapies in treating depression.