scholarly journals 3D phase diagram in vectorcardiography

2016 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Valeri Goussev
Keyword(s):  
Myocardial Infarction ◽  
Phase Diagram ◽  
Phase Diagrams ◽  
The Body ◽  
Dipole Strength ◽  
Statistical Parameters ◽  
Lead System ◽  
3D Space ◽  
Time Signals ◽  
Charge Movements

The article is intended to propose the new technique for analysis and visualization of vectorcardiograms based on the 3D phase diagrams. The regular Frank 3D lead system was considered as the signal source to construct 3D vector space. The three cardio signals from the lead system, representing the currents in the body, and the three integrated in time signals, representing the corresponding charge flows, were used to form 3D phase diagram. This diagram is considered as a new compact description of the dipole object properties in the 3D space, combining simultaneously information about the charge movements and the changes in values and orientation of the current. The regular properties, like the angular momentum of the charge flow and the dipole strength vectors and their covariance can be evaluated from the real vectorcardiogram. Based on the set of vectorcardiograms for 8 healthy controls and 7 myocardial infarction patients the 3D phase diagrams and their statistical parameters are evaluated and discussed. An example is given of the technique implementation for the comparison of the 3D phase diagrams in a control and a myocardial infarction patient.

scholarly journals Phase Diagram of Binary Alloy Nanoparticles under High Pressure

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2929
Author(s):  
Han Gyeol Kim ◽  
Joonho Lee ◽  
Guy Makov
Keyword(s):  
Phase Diagram ◽  
Phase Diagrams ◽  
Interaction Parameter ◽  
Excess Volume ◽  
Eutectic Temperature ◽  
Calphad Method ◽  
Alloy Nanoparticles ◽  
Thermodynamic Conditions ◽  
Nanoparticle System ◽  
Pressure Phase

CALPHAD (CALculation of PHAse Diagram) is a useful tool to construct phase diagrams of various materials under different thermodynamic conditions. Researchers have extended the use of the CALPHAD method to nanophase diagrams and pressure phase diagrams. In this study, the phase diagram of an arbitrary A–B nanoparticle system under pressure was investigated. The effects of the interaction parameter and excess volume were investigated with increasing pressure. The eutectic temperature was found to decrease in most cases, except when the interaction parameter in the liquid was zero and that in the solid was positive, while the excess volume parameter of the liquid was positive. Under these conditions, the eutectic temperature increased with increasing pressure.

Calculation of phase diagrams and thermodynamic properties of 14 additive and reciprocal ternary systems containing Li2CO3, Na2CO3, K2CO3, Li2SO4, Na2SO4, K2SO4, LiOH, NaOH, and KOH

1984 ◽  
Vol 62 (3) ◽  
pp. 457-474 ◽  
Author(s):  
A. D. Pelton ◽  
C. W. Bale ◽  
P. L. Lin
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Molten Salt ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Ternary Systems ◽  
Maximum Error ◽  
Critical Assessment

Phase diagrams and thermodynamic properties of five additive molten salt ternary systems and nine reciprocal molten salt ternary systems containing the ions Li+, Na+, [Formula: see text], OH− are calculated from the thermodynamic properties of their binary subsystems which were obtained previously by a critical assessment of the thermodynamic data and the phase diagrams in these binary systems. Thermodynamic properties of ternary liquid phases are estimated from the binary properties by means of the Conformal Ionic Solution Theory. The ternary phase diagrams are then calculated from these thermodynamic properties by means of computer programs designed for the purpose. It is found that a ternary phase diagram can generally be calculated in this way with a maximum error about twice that of the maximum error in the binary phase diagrams upon which the calculations are based. If, in addition, some reliable ternary phase diagram measurements are available, these can be used to obtain small ternary correction terms. In this way, ternary phase diagram measurements can be smoothed and the isotherms drawn in a thermodynamically correct way. The thermodynamic approach permits experimental data to be critically assessed in the light of thermodynamic principles and accepted solution models. A critical assessment of error limits on all the calculated ternary diagrams is made, and suggestions as to which composition regions merit further experimental study are given.

Slow ventricular activation detected on the body surface in patients with ventricular tachycardia after myocardial infarction

1981 ◽  
Vol 47 ◽  
pp. 498 ◽  
Author(s):  
Michael Simson ◽  
Scott Spielman ◽  
Leonard Horowitz ◽  
Mark Josephson ◽  
Alden Harken ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Ventricular Tachycardia ◽  
Body Surface ◽  
The Body ◽  
Ventricular Activation

scholarly journals Fear of body symptoms and sensations in patients with panic disorders and patients with somatic diseases

2009 ◽  
Vol 137 (11-12) ◽  
pp. 659-663 ◽  
Author(s):  
Milan Latas ◽  
Danilo Obradovic ◽  
Marina Pantic
Keyword(s):  
Myocardial Infarction ◽  
General Population ◽  
Panic Disorder ◽  
Somatic Symptoms ◽  
The Body ◽  
Panic Attacks ◽  
Somatic Illness ◽  
History Of ◽  
Body Sensations ◽  
High Level

Introduction. A cognitive model of aetiology of panic disorder assumes that people who experience frequent panic attacks have tendencies to catastrophically interpret normal and benign somatic sensations - as signs of serious illness. This arise the question: is this cognition specific for patients with panic disorder and in what intensity it is present in patients with serious somatic illness and in healthy subjects. Objective. The aim of the study was to ascertain the differences in the frequency and intensity of 'catastrophic' cognitions related to body sensations, and to ascertain the differences in the frequency and intensity of anxiety caused by different body sensations all related to three groups of subjects: a sample of patients with panic disorder, a sample of patients with history of myocardial infarction and a sample of healthy control subjects from general population. Methods. Three samples are observed in the study: A) 53 patients with the diagnosis of panic disorder; B) 25 patients with history of myocardial infarction; and C) 47 healthy controls from general population. The catastrophic cognitions were assessed by the Agoraphobic Cognitions Questionnaire (ACQ) and the Body Sensations Questionnaire (BSQ). These questionnaires assess the catastrophic thoughts associated with panic and agoraphobia (ACQ) and the fear of body sensations (BSQ). All study subjects answered questionnaires items, and the scores of the answers were compared among the groups. Results. The results of the study suggest that: 1) There is no statistical difference in the tendency to catastrophically interpret body sensations and therefore to induce anxiety in the samples of healthy general population and patients with history of myocardial infarction; 2) The patients with panic disorder have a statistically significantly more intensive tendency to catastrophically interpret benign somatic symptoms and therefore to induce a high level of anxiety in comparison to the sample of patients with the history of serious somatic illness (myocardial infarction) and the sample of healthy general population. Conclusion. The tendency to catastrophically interpret benign somatic symptoms and therefore to induce a high level of anxiety in patients with panic disorder, confirms the cognitive aetiology model of panic disorder and suggests that it should be the focus of prophylactic and therapeutic management of patients with panic disorder.

scholarly journals Phase diagram of the selfinteracting particle­-antiparticle boson system

2021 ◽  
Vol 29 (1) ◽  
pp. 5-14
Author(s):  
D. Anchishkin ◽  
V. Gnatovskyy ◽  
D. Zhuravel ◽  
V. Karpenko
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Phase Diagrams ◽  
Canonical Ensemble ◽  
Bose Condensate ◽  
Mean Field ◽  
Thermodynamic Quantities ◽  
Boson System ◽  
The Mean

A system of interacting relativistic bosons at finite temperatures and isospin densities is studied within the framework of the Skyrme­like mean­field model. The mean field contains both attractive and repulsive terms. The consideration is taken within the framework of the Canonical Ensemble and the isospin­density dependencies of thermodynamic quantities is obtained, in particular as the phase diagrams. It is shown that in such a system, in addition to the formation of a Bose­Einstein condensate, a liquid­gas phase transition is possible. We prove that the multi­boson system develops the Bose condensate for particles of high­density component only.

scholarly journals Thermodynamic reassessment of the Mn-Ni-Si system

2015 ◽  
Vol 51 (2) ◽  
pp. 125-132 ◽  
Author(s):  
B. Hu ◽  
Y. Du ◽  
J.J. Yuan ◽  
Z.F. Liu ◽  
Q.P. Wang
Keyword(s):  
Experimental Data ◽  
Phase Diagram ◽  
Phase Diagrams ◽  
Thermodynamic Parameters ◽  
Ternary Phase ◽  
Sublattice Model ◽  
Diagram Approach ◽  
Measured Phase

Iased on the new experimental data available in the literature, the Mn-Ni-Si system has been reassessed using the CALPHAD (CALculation of PHAse Diagram) approach. Compared with the previous modeling, the ?8 and ?12 ternary phases were treated as the same phase according to the new experimental data. The Mn3Si phase was described with two sublattice model (Mn, Ni)3(Si)1. The reported new ternary phase ? was not considered in the present work. Comprehensive comparisons between the calculated and measured phase diagrams showed that a set of thermodynamic parameters of the Mn-Ni-Si system obtained in this work was more accurate than the previous one.

Special points on the phase diagrams of langbeinites. The case of (x,T)-phase diagram of mixed K2xRb2(1−x)Cd2(SO4)3crystals

2014 ◽  
Vol 88 (2) ◽  
pp. 192-200
Author(s):  
Bohdan Zapeka ◽  
Andriy Say ◽  
Oxana Vlokh ◽  
Myroslav Kostyrko ◽  
Iryna Martynyuk-Lototska ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Diagrams ◽  
Special Points ◽  
T Phase

Abstract 3809: Cardiac-Specific Overexpression of EcSOD Using an AAV9 Vector in Combination with the Cardiac Troponin-T Promoter Inhibits LV Remodeling after Myocardial Infarction

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Konkal-Matt R Prasad ◽  
Ronald J Beyers ◽  
Yaqin Xu ◽  
Brent A French
Keyword(s):  
Myocardial Infarction ◽  
Cardiac Troponin ◽  
Troponin T ◽  
Left Ventricular ◽  
The Body ◽  
Cardiac Troponin T ◽  
Sod Activity ◽  
Western Blots ◽  
Systemic Injection ◽  
Lv Remodeling

Introduction: The wide tissue tropism exhibited by AAV provides for efficient gene transfer throughout the body, but targeting gene expression to cardiomyocytes is desirable for cardiac gene therapy. We hypothesized that targeted overexpression of extracellular superoxide dismutase (EcSOD) via the cardiac Troponin-T (cTnT) promoter would suffice to minimize left ventricular (LV) remodeling after myocardial infarction (MI). Methods: An AAV9 vector expressing EcSOD from the cTnT promoter (AcTnTEcSOD) was injected into 5 wk-old C57 mice via jugular vein (3x10 11 vp/mouse). Western blots, immunohistochemistry & in vitro SOD assays were used to measure EcSOD expression, distribution and activity. Cardiac magnetic resonance (CMR) imaging was performed at baseline (5 wks post-vector injection) and at days 1, 7 & 28 after MI to assess LV volumes (vol) & ejection fraction (EF) as compared to WT mice (n=4). Infarct (IF) sizes were also compared by DE on D1. Results: Systemic injection of the vector (AcTnTEcSOD) provided uniform EcSOD overexpression within cardiomyocytes (Panels A&B) and elevated total cardiac SOD activity by 5.6 fold (p<0.05). On D1 post-MI, IF sizes were similar in vector & WT groups (p=ns). The vector group had significantly lower end-diastolic vol at D7, D28 and lower end-systolic vol at D28 (all p<0.05 by ANOVA, Panels C&D), resulting in improved D28 EF over controls (p=0.02). Conclusions: Cardiac-specific overexpression of therapeutic genes can be achieved by combining highly-efficient AAV9 vectors with cardiac-specific promoters. AAV-mediated, cardiac-restricted overexpression of EcSOD from the cTnT promoter significantly reduces post-MI LV remodeling.

The Capabilities of Haematology Analysers for Assessing the Bodyʼs Physiological and Pathological Conditions (Review)

2021 ◽  
pp. 89-101
Author(s):  
Aliya R. Shamratova ◽  
◽  
Valentina G. Shamratova ◽  
Aliya F. Kayumovа ◽  
Klara R. Ziyakaeva
Keyword(s):  
Blood Cell ◽  
The Body ◽  
Cellular Heterogeneity ◽  
Statistical Characteristics ◽  
Cell Populations ◽  
Asymmetry Coefficient ◽  
Statistical Parameters ◽  
Pathological Conditions ◽  
Different Populations ◽  
Volume Characteristics

Haematology analysers have become an intrinsic part of contemporary medical practice and are used by specialists in various fields of medicine to diagnose diseases and predict their course and outcome. Moreover, the readings of these devices are currently in demand in experimental biology and medicine, toxicology, and veterinary medicine. This review examines the capabilities of modern models of haematology analysers and prospects for their use. New technical approaches combined with already known methods and statistical calculation parameters allow us to significantly expand the range of analyser output. It is shown that the introduction of programs for statistical calculations of a large number of indices and parameters of the distribution of cell populations by their volumes opens up new prospects for describing and evaluating not only pathological, but also physiological states of the body. We analysed both Russian and foreign literature on the use of erythrocyte and platelet indices to diagnose cardiovascular and other pathologies. Taking into account the indicators of corpuscular volume based on histograms and analysing statistical parameters of blood cell distribution enhance our understanding of the structure of blood cell populations, significantly increase the information content of research and can serve as an additional criterion for quantitative assessment of the bodyʼs conditions and diagnosis of diseases. Statistical characteristics such as asymmetry coefficient, kurtosis, and standard deviation of empirical erythrograms and leukograms allow us to assess the degree of anisocytosis and cellular heterogeneity, as well as the ratio of different populations. Studying the volume characteristics of blood cells based on histogram analysis significantly improves the effectiveness of using haematology analysers in evaluating various pathological and physiological conditions of the body.

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