cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Advanced potential field data inversion with ℓp-norm regularization
Creators: name: Fournier, Dominique
Publisher: name: University of British Columbia
Year: 2019

description: The study of gravity and magnetism has a long history in Earth sciences and continues to play an important role in exploration geophysics. Fundamental knowledge about our planet has been gained from the processing of potential field data at all scales: from large tectonic processes, down to the size of mineral deposits. Attempting to model density and magnetization through the inverse process remains challenging however as it is a highly non-unique problem. Conventional unconstrained inversions generally yield either smooth models with poor edge definition or sparse and compact models that are too simplistic to represent subtle features. In this doctoral dissertation, I provide three technical innovations to enhance the capabilities of potential data inversion. First, I propose to explore a wider range of solutions by independently varying the sparsity assumption imposed on the model values and its gradients. At the core of this research is the use of mixed ℓp-norm regularization solved by a scaled Iterative Re-weighted Least Squares algorithm. I provide a path to extract dominant features from the solution space with a Principal Component Analysis and pattern recognition strategy. Secondly, I provide modification to the magnetic vector inversion in spherical coordinates to process magnetic field data affected by remanent magnetization. I tackle long-lasting issues related to the non-linear trigonometric coordinate transformation with an iterative sensitivity re-weighting strategy. The spherical formulation allows me to impose sparsity constraints on the amplitude and orientation of the magnetization vector independently. The algorithm can recover anomalies with a coherent magnetization direction. Lastly, I incorporate soft geological information in the inversion through the rotation of the objective function. Combined with sparsity assumptions, the rotated regularization improves the imaging of orientated geological contacts. Rotation angles are either interpolated from structural measurements or inferred from the data through a learning process. I demonstrate the benefits of structural constraints on gravity and magnetic datasets acquired over the Kevitsa Ni-Cu-PGE deposit, Finland. The recovered density model is compared to a seismic reflection profile for validation and to complement the geological interpretation of the deposit. Accurate modelling of the magnetization vectors yields insights about past tectonic deformations.
title: Spinal Vascular Malformations: A Primer for Diagnostic Radiologists
Creators: name: Herega, Tomislav
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: CNS
subject: Interventional vascular
subject: Neuroradiology spine
subject: Catheter arteriography
subject: MR
subject: MR-Angiography
subject: Diagnostic procedure
subject: Arteriovenous malformations
subject: Fistula

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: This presentation aims to illustrate characteristic imaging findings of spinal vascular malformations (SVMs) at non-invasive imaging, mainly magnetic resonance imaging (MRI) and MR angiography (MRA). We present a pictorial review of cases from our...
Metallic liquid hydrogen and likely Al2O3 metallic glass
Creators: name: Nellis, W. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Dynamic compression has been used to synthesize liquid metallic hydrogen at 140 GPa (1.4 million bar) and experimental data and theory predict Al2O3 might be a metallic glass at ~300 GPa. The mechanism of metallization in both cases is probably a Mott-like transition. The strength of sapphire causes shock dissipation to be split differently in the strong solid and soft fluid. Once the 4.5-eV H-H and Al-O bonds are broken at sufficiently high pressures in liquid H2 and in sapphire (single-crystal Al2O3), electrons are delocalized, which leads to formation of energy bands in fluid H and probably in amorphous Al2O3. The high strength of sapphire causes shock dissipation to be absorbed primarily in entropy up to ~400 GPa, which also causes the 300-K isotherm and Hugoniot to be virtually coincident in this pressure range. Above ~400 GPa shock dissipation must go primarily into temperature, which is observed experimentally as a rapid increase in shock pressure above ~400 GPa. The metallization of glassy Al2O3, if verified, is expected to be general in strong oxide insulators. Implications for Super Earths are discussed.
description: 8 pages, 5 figures, 14th Liquid and Amorphous Metals Conference, Rome 2010
title: Barriers to recruitment and participation in physical rehabilitation research: a mixed methods study among people with multiple sclerosis
Creators: name: Pretty, Ryan W.
Publisher: name: Memorial University of Newfoundland
Year: 2021

description: Background: Quality medical treatment requires research that applies to clinical practice. Unfortunately, research participants do not represent the population seeking treatment, with Multiple Sclerosis (MS) rehabilitation research excluding those who have had a recent relapse and those with physical disability; two groups who often seek rehabilitation. There is likely a subset of people with MS who are being excluded from rehabilitation research. Purpose: To categorize those who are not willing to participate in MS rehabilitation research, and to identify facilitators and barriers to participation. Methods: We analyzed registry data collected during an MS clinic visit and a physical performance assessment. Participants had the option of consenting to one, both, or neither of these visits. Those who did not agree to the physical assessment were termed ‘non-participators’, and regression determined predictors of this decision. Interviews explored barriers to participation described by ‘non-participators’, and a patient engagement session with ‘participators’ considered their views on reported barriers. Results: There were 109 participators and 27 non-participators. Non-participators scored lower in cognition, and were more likely to live in an urban area. Those without cognitive impairment were 3.45 times more likely to participate in rehabilitation research. Interviews (n=8) revealed four themes: (1) fear and uncertainty regarding testing, (2) negative perceptions of research, (3) frustrations with healthcare, and (4) physical impairment as a barrier to participation. Patient engagement event (n=7) revealed three themes: (1) frustrations with healthcare, (2) perceiving participation as beneficial, and (3) interest in holistic treatment. Conclusion: About 19% of the sample were non-participators. Cognitive impairment predicted rehabilitation research non-participation. Fear and uncertainty, physical barriers and negative perceptions of research and healthcare influenced decisions among non-participators, while participators in physical rehabilitation research prioritized the overall benefits of research for themselves and to the community. For rehabilitation research to be applicable to the patients as intended, researchers must identify and overcome barriers and engage patients in the research process.
On the necessity of the revisions for the cosmological matter perturbations from the general relativity
Creators: name: Matsumoto, Jiro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The differential equations, which are used for matter perturbations, are usually derived from the Newton gravity and the Euler equation in the expanded universe. In this paper, by the explicit calculations of metric perturbation theory in $Λ$CDM model, we derive the general relativistic corrections exactly for the equations and show that the differential equations derived from the Newton gravity and the Euler equation are valid in the small scale region from non-relativistic matter dominant era onwards. However the corrections are not negligible in radiation dominant era.
description: 8 pages, LaTeX; the arguments in section 3 are corrected and the results are changed
title: CTH and OEF perfusion parameters in patients with carotid artery stenosis
Creators: name: Brzeska, Beata
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Head and neck
subject: Neuroradiology brain
subject: MR
subject: MR-Diffusion/Perfusion
subject: Stents
subject: Haemodynamics / Flow dynamics

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Cerebral blood flow is closely tied to brain metabolism, and an intricate vascular network mediates its regulation. With severe carotid stenosis, collateral blood flow prevents restriction of blood flow. However, when cerebral perfusion pressure...
Modeling of diffusion of injected electron spins in spin-orbit coupled microchannels
Creators: name: Zarbo, Liviu P.
name: Sinova, Jairo
name: Knezevic, Irena
name: Wunderlich, J.
name: Jungwirth, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on a theoretical study of spin dynamics of an ensemble of spin-polarized electrons injected in a diffusive microchannel with linear Rashba and Dresselhaus spin-orbit coupling. We explore the dependence of the spin-precession and spin-diffusion lengths on the strengths of spin-orbit interaction and external magnetic fields, microchannel width, and orientation. Our results are based on numerical Monte Carlo simulations and on approximate analytical formulas, both treating the spin dynamics quantum-mechanically. We conclude that spin-diffusion lengths comparable or larger than the precession-length occur i) in the vicinity of the persistent spin helix regime for arbitrary channel width, and ii) in channels of similar or smaller width than the precession length, independent of the ratio of Rashba and Dresselhaus fields. For similar strengths of the Rashba and Dresselhaus fields, the steady-state spin-density oscillates or remains constant along the channel for channels parallel to the in-plane diagonal crystal directions. An oscillatory spin-polarization pattern tilted by 45$^{\circ}$ with respect to the channel axis is predicted for channels along the main cubic crystal directions. For typical experimental system parameters, magnetic fields of the order of Tesla are required to affect the spin-diffusion and spin-precession lengths.
description: Replaced with final version (some explanations and figures improved). 8 pages, 6 figures
Intrinsic geometry approach to surface kinetic roughening
Creators: name: Rodriguez-Laguna, Javier
name: Santalla, Silvia N.
name: Cuerno, Rodolfo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: A model for kinetic roughening of one-dimensional interfaces is presented within an intrinsic geometry framework that is free from the standard small-slope and no-overhang approximations. The model is meant to probe the consequences of the latter on the Kardar-Parisi-Zhang (KPZ) description of non-conserved, irreversible growth. Thus, growth always occurs along the local normal direction to the interface, with a rate that is subject to fluctuations and depends on the local curvature. Adaptive numerical techniques have been designed that are specially suited to the study of fractal morphologies and can support interfaces with large slopes and overhangs. Interface self-intersections are detected, and the ensuing cavities removed. After appropriate generalization of observables such as the global and local surface roughness functions, the interface scaling is seen in our simulations to be of the Family-Vicsek type for arbitrary curvature dependence of the growth rate, KPZ scaling appearing for large sytems sizes and sufficiently large noise amplitudes.
Quantum critical point shifts under superconductivity: the pnictides and the cuprates
Creators: name: Moon, Eun Gook
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We compare the position of an ordering transition in a metal to that in a superconductor. For the spin density wave (SDW) transition, we find that the quantum critical point shifts by order |Delta|, where Delta is pairing amplitude, so that the region of SDW order is smaller in the superconductor than in the metal. This shift is larger than the ~ |Delta|^2 shift predicted by theories of competing orders which ignore Fermi surface effects. For Ising-nematic order, the shift from Fermi surface effects remains of order |Delta|^2. We discuss implications of these results for the phase diagrams of the cuprates and the pnictides. We conclude that recent observations imply that the Ising-nematic order is tied to the square of the SDW order in the pnictides, but not in the cuprates.
description: 11 pages, 8 figures
title: Effect of Saharan Dust Intrusions on Precipitation Chemistry in Bulgaria
Creators: name: Georgieva, Emilia
name: Hristova, Elena
name: Veleva, Blagorodka
Publisher: name: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 467-479
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: The objective of this work is to investigate the influence of Saharan dust events on the chemical composition of rain samples collected at three sites in Bulgaria during 2017-2018. Saharan dust intrusions were identified through a combination of satellite retrieved aerosol data and results from dust forecasting models and from backward trajectory model. The chemical composition of the samples (acidity pH, conductivity EC, main ions and elements) is analysed in view of the direction of the approaching air masses – “direct” influence (south-west), and “indirect” influence from other directions and regions, already impacted by Saharan dust. All samples were characterised by elevated values of pH (max 7.4), EC (max 202 µS.cm-1) and Si, Ca, Fe, Mg concentrations. For cases with direct influence Si and Ca values were up to 1.5 and 25 mg.l-1. In most of the indirect cases increased concentrations of sulphate, nitrate and ammonium were observed (up to 39.5, 23.1 and 8.3 mg.l-1).
description: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 467-479
Heat curing method and laboratory performance evaluation of subgrade soil stabilized with bentonite and magnesium alkalinization
Creators: name: Sabrin, Sohana
Publisher: name: University of British Columbia
Year: 2019

description: Alkalinization of problematic soils with silica and alumina rich material to improve their mechanical properties has become a popular practice globally. However, the application of alkalinization process to improve road bases and subbases namely subgrades are limited. Besides, the properties and performance of alkalinization process are dominated by several factors mainly initial curing conditions, concentration of alkaline activators and composition of materials. This study is aimed to investigate the effect of curing condition (temperature and duration) on unconfined compressive strength, elastic modulus (E50), microstructure and freeze thaw durability of silty sand subgrade soil stabilized with bentonite magnesium alkalinization. The selected curing temperatures and durations included ambient temperature, 40°C, 60°C and 80°C for 1 day and up to 3 days. Results revealed that curing at ambient temperature or as low as 40°C is not enough to achieve desirable strength while further increase in temperature favored substantial strength development. However, the properties of samples cured at elevated temperature for longer duration significantly deteriorated at later age (60 days) compared to the properties of samples cured at a slightly lower temperature. The optimal development of unconfined compressive strength and E50 observed when samples cured at 60°C for 3 days and the degree of improvement is 7 times compared to the natural soil. In addition, the scanning electron microscopy (SEM) images revealed presence of cementitious gel resulted from stabilization process. The data from energy-dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA) confirmed the presence of cementitious gel magnesium silicate hydrate (M-S-H) and calcium silicate hydrate (C-S-H) which made the samples more compacted and stable with time. Finally, higher unconfined compressive strength loss was observed during freeze thaw durability test but the samples were capable to withstand all 12 freeze thaw cycles.
title: ÐÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ Ð¸Ð½ÑÐµÑÑÐµÐ¹ÑÐ° Ð¾Ð±ÑÑÐ°ÑÑÐ¸Ñ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼
title: Problems of e-learning interface perception
Creators: name: ÐÐ¸ÑÐ¸Ð½Ð°, ÐÐµÑÐ°
name: "Ð¡Ð¸ÑÑÐµÐ¼Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð² Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸", Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½Ð°Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ (27; 2023; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ðµ Ð¸Ð½ÑÐµÑÑÐµÐ¹ÑÐ°
Ð¾Ð±ÑÑÐ°ÑÑÐ°Ñ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼Ð°
Ð´Ð¸Ð·Ð°Ð¹Ð½ Ð¾Ð±ÑÑÐ°ÑÑÐ¸Ñ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼
interface perception
e-learning platform
design of e-learning platforms

description: Ð ÑÑÐ°ÑÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÑÑÑÑ Ð°ÐºÑÑÐ°Ð»ÑÐ½ÑÐµ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ Ð¸Ð½ÑÐµÑÑÐµÐ¹ÑÐ¾Ð² Ð¾Ð±ÑÑÐ°ÑÑÐ¸Ñ Ð¿Ð»Ð°ÑÑÐ¾ÑÐ¼. ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¾ Ð½Ð° Ð°Ð½Ð°Ð»Ð¸Ð·Ðµ Ð¿ÐµÐ´Ð°Ð³Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ Ð¸ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ñ Ð°ÑÐ¿ÐµÐºÑÐ¾Ð² Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ Ð¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°ÑÐµÐ»ÐµÐ¹ Ñ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÐ¼Ð¸ ÑÐµÑÑÑÑÐ°Ð¼Ð¸. ÐÑÐ¾Ð±Ð¾Ðµ Ð²Ð½Ð¸Ð¼Ð°Ð½Ð¸Ðµ ÑÐ´ÐµÐ»ÐµÐ½Ð¾ Ð²ÑÑÐ²Ð»ÐµÐ½Ð¸Ñ ÑÐ°ÐºÑÐ¾ÑÐ¾Ð², Ð²Ð»Ð¸ÑÑÑÐ¸Ñ Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ, Ð¸ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¹ Ð´Ð»Ñ Ð¾Ð¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ Ð¾Ð¿ÑÑÐ°.
description: The article discusses current problems of perception of learning platform interfaces. The study is based on an analysis of the pedagogical and technical aspects of user interaction with educational resources. Particular attention is paid to identifying factors that influence the quality of perception and offering practical recommendations for optimizing the user experience.
Dual Superconformal Symmetry of N=6 Chern-Simons Theory
Creators: name: Huang, Yu-tin
name: Lipstein, Arthur E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that the four and six-point tree-level amplitudes of N=6 superconformal Chern-Simons theory (ABJM) enjoy OSp(6|4) dual superconformal symmetry if one enlarges the dual superspace to include three additional Grassmann-even coordinates which correspond to an abelian isometry of CP3. The inclusion of these coordinates enables us to match the nontrivial dual superconformal generators with level-one Yangian generators when acting on on-shell amplitudes. We also discuss some implications of dual conformal symmetry for loop-level amplitudes.
description: 32 pages; v3: minor changes, published in JHEP
A potential theoretic characterization of compactness of the dbar-Neumann problem
Creators: name: Sahutoglu, Sonmez
Publisher: name: arXiv
Year: 2010
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32W05

description: We give a potential theoretic characterization for compactness of the dbar-Neumann problem on smooth bounded pseudoconvex domains in C^n.
description: 6 pages
Optimal Meshes for Finite Elements of Arbitrary Order
Creators: name: Mirebeau, Jean-Marie
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Given a function f defined on a bidimensional bounded domain and a positive integer N, we study the properties of the triangulation that minimizes the distance between f and its interpolation on the associated finite element space, over all triangulations of at most N elements. The error is studied in the Lp norm and we consider Lagrange finite elements of arbitrary polynomial degree m-1. We establish sharp asymptotic error estimates as N tends to infinity when the optimal anisotropic triangulation is used, recovering the earlier results on piecewise linear interpolation, an improving the results on higher degree interpolation. These estimates involve invariant polynomials applied to the m-th order derivatives of f. In addition, our analysis also provides with practical strategies for designing meshes such that the interpolation error satisfies the optimal estimate up to a fixed multiplicative constant. We partially extend our results to higher dimensions for finite elements on simplicial partitions of a domain of arbitrary dimension. Key words : anisotropic finite elements, adaptive meshes, interpolation, nonlinear approximation.
description: 34 pages, 5 figures
Библиография Шевченко В.В.
Creators: name: Владимировна, Шевченко Валентина
Publisher: name: Zenodo
Year: 2019
Subjects: Шевченко Валентина Владимировна
библиография
Шевченко Валентина Володимирівна
бібліографія
Shevchenko Valentina V.
bibliography

description: Список научных трудов Шевченко Валентины Владимировны

(на языке оригинала - на русском, украинском и английском). https://doi.org/10.5281/zenodo.2604854

Список наукових праць Шевченко Валентини Володимирівни

(мовою оригіналу - російською, українською та англійською).

List of scientific papers Shevchenko Valentina V.

(in the original language - in Russian, Ukrainian and English).
title: Evaluation of the effect of breast implants on the accuracy of the CT attenuation Correction (CTAC) map for SPECT/CT myocardial perfusion imaging: A phantom study
Creators: name: Alanezi, Abdullah
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Molecular imaging
subject: Nuclear medicine
subject: Radiation physics
subject: PET-CT
subject: PET-MR
subject: SPECT-CT
subject: Radionuclide therapy
subject: Quality assurance

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Coronary artery disease (CAD) typically arises as a result of a blockage in the arteries supplying oxygenated blood to the heart. A partial blockage can lead to decreased myocardial blood flow to the heart, which is commonly experienced in the form...
Formation of partial energy gap below the structural phase transition and the rare-earth element substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)
Creators: name: Dong, T.
name: Chen, Z. G.
name: Yuan, R. H.
name: Hu, B. F.
name: Cheng, B.
name: Wang, N. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Single crystals of LaFeAsO, NdFeAsO, and SmFeAsO have been prepared by means of a NaAs flux growth technique and studied by optical spectroscopy measurements. We show that the spectral features corresponding to the partial energy gaps in the spin-density-wave (SDW) state are present below the structural phase transition. This indicates that the electronic state below the structural phase transition is already very close to that in the SDW state. We also show that in-plane infrared phonon modes display systematic shifts towards high frequency upon rare-earth element substitutions for La, suggesting a strong enhancement of the bonding strength. Furthermore, an asymmetric line-shape of the in-plane phonon mode is observed, implying the presence of an electron-phonon coupling effect in Fe-pnictides.
description: 6 pages
Detection of interstellar hydrogen peroxide
Creators: name: Bergman, P.
name: Parise, B.
name: Liseau, R.
name: Larsson, B.
name: Olofsson, H.
name: Menten, K. M.
name: Güsten, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The molecular species hydrogen peroxide, HOOH, is likely to be a key ingredient in the oxygen and water chemistry in the interstellar medium. Our aim with this investigation is to determine how abundant HOOH is in the cloud core ρ Oph A. By observing several transitions of HOOH in the (sub)millimeter regime we seek to identify the molecule and also to determine the excitation conditions through a multilevel excitation analysis. We have detected three spectral lines toward the SM1 position of ρ Oph A at velocity-corrected frequencies that coincide very closely with those measured from laboratory spectroscopy of HOOH. A fourth line was detected at the 4σ level. We also found through mapping observations that the HOOH emission extends (about 0.05 pc) over the densest part of the ρ Oph A cloud core. We derive an abundance of HOOH relative to that of H_2 in the SM1 core of about 1\times10^(-10). To our knowledge, this is the first reported detection of HOOH in the interstellar medium.
description: 5 pages, 4 figures, accepted for publication in Astronomy & Astrophysics, new version corrects a typo in Table 1 (and consequently in Fig 4)
title: Effects of red blood cell content and retraction on Hounsfield units in artificial thrombi
Creators: name: Viltužnik, Rebeka
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Arteries / Aorta
subject: Interventional vascular
subject: Vascular
subject: CT
subject: Diagnostic procedure
subject: Experimental investigations
subject: Technical aspects
subject: Arteriosclerosis
subject: Embolism / Thrombosis
subject: Obstruction / Occlusion

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: The purpose of this study is to see how well CT can distinguish between different haematocrit levels and how thrombi red blood content and their retraction effects CT characteristics in single energy and dual energy imaging...
Analysis of the scalar and axial-vector heavy diquark states with QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we study the mass spectrum of the scalar and axial-vector heavy diquark states with the QCD sum rules in a systematic way. Once the reasonable values are obtained, we can take them as basic parameters and study the new charmonium-like states as the tetraquark states.
description: 16 pages, 24 figures, slight revision
title: PBL Vertical Structure During Extreme Wind Events at Seaside Region of Southern Bulgaria
Creators: name: Barantiev, Damyan
name: Batchvarova, Ekaterina
name: Kirova, Hristina
name: Gueorguiev, Orlin
Publisher: name: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 480-490
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: Ground-based remote sensing (GBRS) data collection with Scintec Sodar MFAS was performed in southern Bulgarian Black Sea side from August 2008 until October 2016. These high spatial (10 m) and temporal (10 minutes with averaging time of 20 minutes) resolution measurements of wind and turbulent parameters have been used to explore the vertical structure of the coastal boundary layer during extreme wind events. For this purpose, the ninety-percentile of the two-parameter Weibull distribution of the wind speed at every sodar measurement level from 30 up to 600 m is used as a criterion to define the “rare” values within their statistical distributions and to identify a theoretical extreme wind speed profile (reference profile). On this basis, the extreme profiles during the reviewed period have been determined and their multiple time series have been then used to derive averaged profiles of twelve sodar output parameters under extreme winds conditions.
description: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 480-490
Thermodynamic Stability of Warped AdS3 Black Holes
Creators: name: Birmingham, Danny
name: Mokhtari, Susan
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the thermodynamic stability of warped black holes in three-dimensional topologically massive gravity. The spacelike stretched black hole is parametrized by its mass and angular momentum. We determine the local and global stability properties in the canonical and grand canonical ensembles. The presence of a Hawking-Page type transition is established, and the critical temperature is determined. The thermodynamic metric of Ruppeiner is computed, and the curvature is shown to diverge in the extremal limit. The consequences of these results for the classical stability properties of warped black holes are discussed within the context of the correlated stability conjecture.
description: 10 pages
title: Black Sea Holocene Environmental Setting in Respect of Ostrea Edulis Appearance and Loss
Creators: name: Genov, Ivan
name: Slavova, Krasimira
name: Nonova, Tzvetana
name: Koleva-Rekalova, Elena
Publisher: name: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 491-500
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: Geological and palaeoclimatic Holocene setting in the Black Sea has been traced. This research suggests that the appearance of Ostrea edulis in the Black Sea during the Middle Holocene, not immediately after the invasion of Mediterranean waters, is due to the dynamics of interconnected climate and abiotic parameters of the basin. Although the reasons for the decrease in abundance of the Black Sea population of flat oysters are still uncertain, we attempts, through a comparative analysis of key abiotic factors in the past and today, to suggest that it is quite possible marine ecosystems to respond to modern changes of key climaterelated drivers and pollution by changing their habitat and/or extinction. Geological approaches were used to study the abiotic factors of the environment (salinity and temperature) back in time.
description: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 491-500
The Mod-2 Cohomology Ring of the Third Conway Group is Cohen-Macaulay
Creators: name: King, Simon A.
name: Green, David J.
name: Ellis, Graham
Publisher: name: arXiv
Year: 2010
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20J06 (Primary) 20-04, 20D15 (Secondary)

description: By explicit machine computation we obtain the mod-2 cohomology ring of the third Conway group Co_3. It is Cohen-Macaulay, has dimension 4, and is detected on the maximal elementary abelian 2-subgroups.
description: 12 pages; writing style now more concise
title: Shear wave elastography of early rectal cancer
Creators: name: Loft, Martina
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Oncology
subject: Elastography
subject: Ultrasound
subject: Staging
subject: Cancer

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: To access the performance of endorectal ultrasound (ERUS) and the ability of shear wave elastography (SWE) to discriminate between rectal adenoma and early rectal cancer (ERC, i.e....
Some Aspects of Quantum Cryptography and Network Security
Creators: name: Sen, Jaydip
name: Chowdhury, Piyali Roy
name: Sengupta, Indranil
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Quantum mechanics is the current best description of the world as we know it. Experiments have shown that quantum predictions are accurate up ten places of decimal. In quantum cryptography much work has been devoted to the study of Quantum Key Distribution (QKD). The purpose of QKD is to securely distribute secret keys between the users in a network. As a result, several quantum cryptographic protocols have been implemented and tested after the advent of quantum computing. In this paper, we have given a brief overview of QKD, and some practical networks that integrate QKD in the current Internet security architecture. We have also discussed some aspects of quantum network security with particular attention to Byzantine Agreement Protocol.
description: This was withdrawn because the key distribution figures Figure 1 and 3 in the paper are technically incorrect
The National Outstanding Organization Award (OOA), the National Certificate of Honor, Peking, China. (Siming Zheng)_For CUHK.
Creators: name: Siming Zheng
Publisher: name: figshare
Year: 2020
Subjects: Digital Humanities

description: Regarding this National Outstanding Organization Award, Certificates of Honor:
I was on behalf of my Guangzhou University, South China Institute of Software Engineering and awarded by the first award with second prize of "National Honor of Certificate" on Jun 3, 2013. All the awarding activities were held in China Digital Science and Technology Museum (CDSTM) of Peking City, China.
Awarding Bodies:
1). China Association for Science and Technology, Peking, China
2). Department of Science and Technology, Ministry of Education, Peking, China
3). Ministry of Education of the People's Republic of China, Peking, China
4). Communist Youth League of China, Peking, China

Basis of Award: Election and Nomination.
Thank you for your attention.
Applicant name: Siming Zheng
Written date: Nov 20th, 2020.
Best regards.
Liberalismus und Pluralismus
Creators: name: Klatt, Stefan
Publisher: name: Zenodo
Year: 2011

description: Plakat zum Workshop "Liberalismus und Pluralismus" der DFG-Kolleg-Forschergruppe "Theoretische Grundfragen der Normenbegründung in Medizinethik und Biopolitik" am 31. Mai 2011
Economic Analysis of Pro-Vitamin A Cassava Variety: Atipof Health benefits Among Consumers
Creators: name: Udemezue, J.C.
name: Ekwuye, B.M.
name: Nweke, J.O.
Publisher: name: gjrpublication
Year: 2024

description: Hunger and malnutrition have not been able to be successfully addressed for a number of years in Africa, and these led to poor diet, which is the foremost among the causes of micronutrient deficiencies in the continent. Vitamin A deficiency is an important micronutrient deficiency prevailing in Asia and Sub-Saharan Africa; this imposed threats to children and pregnant women in the continents as well. As a result of this, efforts have been made to develop and distribute vitamin-A-enriched cassava varieties across continents through a process known as biofortification. Biofortification is an innovative process of enhancing the micronutrient composition of food crops to caution against the effects of micronutrient deficiencies. Boi-fortified cassava is, therefore, not just a food crop but as a major source of health benefits and cash income for producers in comparison with other staple crops. It contributes positively to poverty alleviation by generating income for the vast number of households. Industrial applications for cassava include the production of starch, high-quality cassava flour, ethanol, cassava chips, and dried pellets. Cassava leaves are nutritious vegetables and can be used as animal feed. Pro-vitamin A cassava varieties have a high potential to reduce poverty and malnutrition among the smallholder farm households in Nigeria. In light of the above, this paper used available literature to look into the following: analysis of pro-vitamin A cassava enterprise: implications to health benefits, diffusion and consumption update of pro-vitamin A cassava varieties released in Nigeria, and challenges of delivering pro-vitamin A cassava to the end users.
title: Effect of Organic Matter Loading on Nutrient and Oxygen Fluxes at the Sediment-Water Interface in Different Sedimentary Habitats in Sozopol Bay (Sw Black Sea): a Laboratory Experiment
Creators: name: Klayn, Stefania
name: Berov, Dimitar
name: Karamfilov, Ventzislav
Publisher: name: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 501-511
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: Coastal benthic sediments play an important role in regulating water column nutrient concentrations and primary production via nutrient regeneration and exchanges at the sediment-water interface. This study aimed to characterize the diffusive benthic fluxes of NH4 + , NO3 – , PO4 -3, and O2 in some of the most common shallow sedimentary habitats (fine and coarse sands, seagrass beds, and unvegetated patches within the seagrass beds) along the Bulgarian coast, and their changes under organic loading, through a laboratory experiment. Nutrient fluxes were dominated by a release of NH4 + to the water column in all sediment types, and a parallel uptake of NO3 – by the sediments; both fluxes increased under organic loading, possibly indicating stimulation of nitrate reduction within the sediments. The PO4 -3 fluxes were smaller, and the sediments mostly acted as a source for phosphorus under organic loading. O2 was taken up from the overlying water in all treatments and sediment types, and this flux increased under organic loading, probably in relation to the decomposition of the organic matter and spontaneous chemical oxidation of sulphide ions, released during sulphate reduction within the sediments. The study contributes towards the understanding of nutrient cycling and the role of the benthic compartment in Black Sea coastal soft-bottom habitats.
description: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 501-511
title: Atypical Solid Nodules on HRCT Images: A Type of Solid Nodule with a Favorable Prognosis
Creators: name: Liu, Mengwen
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Lung
subject: Oncology
subject: Thorax
subject: CT
subject: CT-High Resolution
subject: Image manipulation / Reconstruction
subject: Screening
subject: Staging
subject: Surgery
subject: Cancer
subject: Pathology
subject: Radiation oncology in Developing Nations

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Lung cancer is the most common cause of death, with approximately 350 people dying from lung cancer per day [1]. Solid component correlates with cancer staging and prognosis [2,4]. Solid nodules with multiple regional air spaces on high-resolution...
Very special relativity as relativity of dark matter: the Elko connection
Creators: name: Ahluwalia, D. V.
name: Horvath, S. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the very special relativity (VSR) proposal by Cohen and Glashow, it was pointed out that invariance under HOM(2) is both necessary and sufficient to explain the null result of the Michelson-Morely experiment. It is the quantum field theoretic demand of locality, or the requirement of P, T, CP, or CT invariance, that makes invariance under the Lorentz group a necessity. Originally it was conjectured that VSR operates at the Planck scale; we propose that the natural arena for VSR is at energies similar to the standard model, but in the dark sector. To this end we provide an ab initio spinor representation invariant under the SIM(2) avatar of VSR and construct a mass dimension one fermionic quantum field of spin one half. This field turns out to be a very close sibling of Elko and it exhibits the same striking property of intrinsic darkness with respect to the standard model fields. In the new construct, the tension between Elko and Lorentz symmetries is fully resolved. We thus entertain the possibility that the symmetries underlying the standard model matter and gauge fields are those of Lorentz, while the event space underlying the dark matter and the dark gauge fields supports the algebraic structure underlying VSR.
description: 19 pages. Section 5 is new. Published version (modulo a footnote, and a corrected typo)
title: Application value of multiphase CTA color-code map for acute ischemic stroke with distal branch artery occlusion
Creators: name: Dong, Lijun
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Vascular
subject: CT-Angiography
subject: Diagnostic procedure
subject: Obstruction / Occlusion

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Most previous studies have focused solely on large arterial occlusions in the anterior circulation, with less attention paid to distal branch artery occlusions. With the development of software, technology has emerged to fuse and color code...
An Empirical Reappraisal of the Level of Traffic Stress Framework.
Creators: Cabral, Laura
Kim, Amy M.
Publisher: name: University of Alberta Library
Year: 2022

The Level of Traffic Stress (LTS) framework is widely used to assess the suitability of roadway environments for cycling. Its main strength is the identification of infrastructure characteristics that meet the needs of different cyclist groups. The four levels of infrastructure ratings, LTS 1 to LTS 4, roughly map to the cyclist types defined by the Four Types of Cyclist typology. Despite its popularity, the LTS framework has several limitations, including reliance on a cyclist typology that was developed subjectively, and a lack of empirical evidence to define thresholds between levels. This work builds on our previous empirically-based findings that cyclists form three groups rather than four: Uncomfortable or Uninterested, Cautious Majority, and Very Comfortable Cyclists. We use survey data from Edmonton, Canada, to update the LTS framework such that levels match the three types of cyclists. Direct infrastructure ratings, binary logistic regression, and route choice data provide the empirical foundation to determine infrastructure characteristics that are suitable for the three types of cyclists. This adjusted framework is called Level of Cycling Comfort (LCC). We apply the framework to Edmonton and compare connectivity outcomes using both LTS and LCC frameworks. Overall, the LCC framework yields more conservative estimates of connectivity.
Coming to the table as a regional food system : mapping and building a network
Creators: name: Lang, Eva-Lena
Publisher: name: University of British Columbia
Year: 2019

description: Currently farmers and other food system actors in the North Okanagan face numerous challenges. Relationships between some stakeholders within the regional food system do exist; however, there are also silos separating the stakeholders (food producers, processors, wholesalers/distributors, retailers and chefs as well as local government, non-profits and academics) and coordination is lacking. Inspired by the success story of Vermont, a small group began a process that resulted in Land to Table (L2T), a Collective Impact network whose goal is to develop a North Okanagan food system that is economically prosperous, environmentally sustainable and socially accessible. My Research Aim, therefore, was to facilitate a group of stakeholders to further strengthen their regional food system network. To address this aim, an approach combining Community Based Participatory Research and Deliberative Dialogue was used to engage with a Community Advisory Committee and four focus groups. Two customized methods were used. One, called participatory network mapping, was developed to map and analyze the current state of the food system network. The other, called the build the network framework, aimed at developing recommendations for building a network that is more connected, aligned, productive and healthy. Through the mapping exercise, both the strengths and the weaknesses of the current food system network were revealed. The stakeholders that participated noted strong connections between some network members, but they also commented on the absence of certain key members, a number of missing connections and the need for more strategic coalitions within the network. The build the network framework, combined with a carefully designed Deliberative Dialogue that integrated portions of text (literature synthesis) with the results of the mapping exercises (research evidence), proved effective in developing recommendations for building a network. Overall, the Community Based Participatory Research approach was useful for guiding the research, with the Community Advisory Committee providing invaluable input as well as continuity in building from research question to research question, while the focus groups added important perspectives to the mapping. To conclude, this research methodology was effective in engaging stakeholders to further strengthen the North Okanagan food system network and appears to have potential for application elsewhere.
title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÐ¿Ð»Ð¾Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ Ð¸ Ð¾Ð¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ñ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ Ð¿Ð¾ÑÑÐ½Ñ ÑÐ¾ÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð´Ð¸Ð·ÐµÐ»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Research of the heat-stressed state and optimization of the design of the piston of a forced internal combustion engine
Creators: name: Ð¨Ð¸Ð»Ð¾Ð², ÐÐ½ÑÐ¾Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ Ð¿Ð¾ÑÑÐ½Ñ
ÑÐµÐ¿Ð»Ð¾Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð½Ð¾Ðµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ðµ
ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
piston structure
heat-stressed state
numerical simulation

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¾Ð¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿Ð¾ÑÑÐ½Ñ Ð´Ð¸Ð·ÐµÐ»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð245. ÐÐ°Ð´Ð°ÑÐ¸, ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÐµÑÐ°Ð»Ð¸ÑÑ Ð² ÑÐ¾Ð´Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ: 1. ÐÐ·ÑÑÐµÐ½Ð¸Ðµ Ð²Ð¸Ð´Ð¾Ð² Ð¸ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐµÐ¹ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¹ Ð¿Ð¾ÑÑÐ½ÐµÐ¹ Ð´Ð¸Ð·ÐµÐ»ÐµÐ¹. 2. ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ðµ ÑÐµÑÑÐµÐ¶ÐµÐ¹ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÐ¼ÑÑ Ð½Ð°Ð¼Ð¸ Ð¿Ð¾ÑÑÐ½ÐµÐ¹. 3. Ð Ð°ÑÑÑÑ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ½ÑÑ Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ðµ Ð¸ Ð´ÐµÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¹ Ð² Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ ÐÐÐ RP-TOX. 4. ÐÐ¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ðµ Ð³ÑÐ°Ð½Ð¸ÑÐ½ÑÑ ÑÑÐ»Ð¾Ð²Ð¸Ð¹ Ð² Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ SOLIDWORKS SIMULATION.
description: This work is devoted to the study of the optimization of the piston of the D245 diesel engine. Tasks that were solved during the study: 1. Studying the types and design features of diesel pistons. 2. Design and construction of drawings of the pistons we are studying. 3. Calculation of thermal stresses and deformations in the PMK RP-TOX program. 4. Modeling and construction of boundary conditions in the SOLIDWORKS SIMULATION program.