Analysis of the Efficiency PETSc and PETIGA Libraries in Solving the Problem of Crystal Growth

We present an analysis of high performance computational method for solving the problem of crystal grows. The method uses PETSc and PETIGA C-language based libraries and supports parallel computing. The evolution of calculation process was studied in series of special computations are obtained on innovative mobile cluster platform, which provides exclusive system tuning abilities. The results of research confirm the high efficiency of the proposed algorithm on multi-core computer systems and allow us to recommend the use of PETSc and PETIGA for solving high order differential equations

ENERGY EFFICIENT WAY OF PARAFFIN OIL PRODUCTION AND TRANSPORT SYSTEMS

В работе рассмотрены основные вопросы, связанные с транспортом парафинистой нефти. Определены основные энергозатратные этапы процессов добычи и транспорта нефти. Показаны перспективы решения этих вопросов.The paper is aimed to main problem decision connected with paraffin oil production and transport. The main energy consuming stages both of these processes are determined. Perspective view for all these problems solution is shown

Integrated solution for very high cardiovascular risk patients. Rationale and design of a pilot study

Coronary artery disease (CAD) is the most common cardiovascular disease and the leading cause of morbidity and mortality. Acute coronary syndrome (ACS) as an abrupt destabilization of CAD, multiplies the risk of cardiovascular events. To reduce the incidence of recurrent cardiovascular events, timely tackling potentially reversible risk factors such as hypertension and/or hyperglycemia is imperative. However, a solid basis for a secondary prevention lies in the treatment of dyslipidemia and begins in the first hours of hospital admission. Despite considerable evidence regarding the efficacy and safety of lipid-lowering therapy, averagely only one third of patients maintain control of lipids. The main challenges are low adherence, poor continuity of medical care, and the lack of an ambulatory routine follow-up. Telehealth solutions are believed to address these barriers and may be considered as an add-on to in-person patient care. Telemonitoring of vital and laboratory parameters, remote patient counseling can be introduced into routine care delivery. Telemedicine shows promise for fostering better clinical effect, and provides health-related quality of life improvement.It is planned to conduct a pilot observational study aimed to create and to test an integrated solution, i.e. telemonitoring and remote counseling in patients of very high cardiovascular risk with ACS followed by myocardial revascularization. The goal is to determine the clinical effectiveness, i.e achievement of target values of blood pressure, lipid profile and glycemia, and patient-centeredness of this approach

Synthesis of a new DTTA-and 5-phenyl-2,2′-bipyridine-based ditopic ligand and its Eu3+ complex

A new ditopic ligand based on diethylenetriamine-N,N,N'',N''-tetraacetate (DTTA) and 5-phenyl-2,2′-bipyridine has been synthesized. The improved method for the synthesis of DTTA tert-butyl ester has been developed. The water-soluble Eu3+∗DTTA complex of this ligand has been prepared, and its photophysical properties have been studied. Due to the presence of an extra chelating unit, 5-phenyl-2,2′-bipyridine, this Eu3+∗DTTA complex demonstrated a strong fluorescence response to the Zn2+ cation (fluorescence enhancement) and the simultaneous fluorescent and phosphorescent response (fluorescence and phosphorescence quenching) to the Cu2+ or Ni2+ cations in aqueous solutions. © 2016 Published by NRC Research Press

The effectiveness of parallelizing an algorithm of the PFC equation solution using PetIGA library

The paper presents an algorithm for solving the equation of Phase Field Crystal (PFC) in a hyperbolic statement that allows to describe the phase transitions of metastable or unstable state at the nuclear density scale, described by a differential equation of the sixth order with respect to the space variable and the second order with respect to the time variable. The algorithm is based on the method of isogeometric analysis (IGA) and is implemented by PetIGA library. The resulting code allows parallel computations, which significantly speeds up the process of solving a problem. The effectiveness of used instruments during the calculations on high-performance computing clusters is evaluated. An analysis of the effectiveness of the current algorithm is carried out for heterogeneous computer systems

EXPERIMENTAL STUDY OF THERMOSYPHONES AT HEAT OF FLUE GASES UTILIZATION

The work is aimed at studying transients in thermosyphons. The calculated dependencies for determining the main temperature characteristics of the control object are obtained. Therefore, the thermal resistances of the main elements of the thermosyphon were determined. The equations for calculating the saturation temperature in thermosyphon depending on the design and operating parameters of the heat exchanger are proposed.Работа направлена на изучение переходных процессов в термосифонах. Получены расчетные зависимости для определения основных температурных характеристик объекта регулирования. Для этого были определены термические сопротивления основных элементов термосифона. Предложены уравнения для расчета изменения температуры насыщения в термосифоне в зависимости от конструктивных и режимных параметров теплоутилизатора

Usage of thermosiphons for recycling of high-temperature gases heat

The work is aimed at studying of transient processes in thermosyphons. The calculated dependences for determining the basic temperature characteristics of the controlled object are obtained. Equations for calculating the change in saturation temperature in a thermosyphon are proposed. These changing are strongly depends on the design and operating parameters of the heat exchanger. Calculations of the change in the saturation temperature in a thermosyphon with a linear decrease in the temperature of gases are shown. For these investigations the changes in the temperature of gases and the saturation temperature in thermosyphons were held. Comparison of the calculated and experimental data show a satisfactory agreement.Работа направлена на изучение переходных процессов в термосифонах. Получены расчетные зависимости для определения основных температурных характеристик объекта регулирования. Предложены уравнения для расчета изменения температуры насыщения в термосифоне в зависимости от конструктивных и режимных параметров теплоутилизатора. Получены выражения для постоянной времени и коэффициента усиления при ступенчатом увеличении температуры газов. Приведены расчеты изменения температуры насыщения в термосифоне при линейном уменьшении температуры газов. Сопоставление расчетных и экспериментальных данных показывает удовлетворительное совпадение

Combination of Endobronchial Ultrasound and Modern Cytological Diagnosis in Patients With Intrathoracic Lesions

Objective: To evaluate the effectiveness of endobronchial (EBUS) and endoscopic ultrasound (EUS) in cytomorphological verification of a malignant process using the transbronchial needle aspiration (TBNA) of the lymph nodes and mediastinal organs.Materials and methods: In 2017–2019 we analyzed the cytological samples (standard and cell block) of 172 patients (115 males and 57 females) with an average age of 61 years (25–82 years) in the clinical diagnostic laboratory of Scientific Research Institute – Ochapovsky Regional Clinical Hospital No. 1 (Krasnodar, Russian Federation). Of them 111 were used for immunocytochemical analysis. The majority of the studies (77) were performed in patients with lung cancer in order to identify the stage of the disease. We used combined bronchoscopy under general anesthesia in the operating room with high-frequency ventilation and a rapid on-site evaluation (ROSE).Results: We found the lymph node and mediastinal invasion in 140 (81%) patients who underwent EBUS-EUS TBNA. The non-diagnostic results were obtained in 32 (19%) patients. The combination of EUS and EBUS with TBNA showed the highest effectiveness in the mentioned clinical cases. The sensitivity, specificity, and accuracy of the cytologic analysis during EBUS and EUS with TBNA and no ROSE were 89%, 100%, and 90%, respectively. ROSE reduced the rate of non-diagnostic results and increased the sensitivity (96%), specificity (100%), and accuracy (97%) of the cytologic evaluation.Conclusions: According to the obtained results, we recommend using EBUS-EUS TBNA modalities for morphological verification of the mediastinal lymph nodes as a routine invasive diagnosis component of the preoperative evaluation in patients with lung cancer

Scaling of Particle and Transverse Energy Production in 208Pb+208Pb collisions at 158 A GeV

Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (N_{part}) and the number of binary nucleon-nucleon collisions (N_{coll}) in 158 A GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as N_{part}^{1.08 \pm 0.06} and N_{coll}^{0.83 \pm 0.05} is observed. For the charged particle pseudorapidity density at midrapidity we find a scaling as N_{part}^{1.07 \pm 0.04} and N_{coll}^{0.82 \pm 0.03}. This faster than linear scaling with N_{part} indicates a violation of the naive Wounded Nucleon Model.Comment: 13 pages, 16 figures, submitted to European Physical Journal C (revised results for scaling exponents