HEALTH MAINTENANCE OF WORKERS EXPOSED TO HAZARDOUS INDUSTRIES AS A POSSIBLE FACTOR IN THE PREVENTION OF OCCUPATIONAL PATHOLOGY

2021 ◽  
Author(s):  
T.Yu. Obukhova ◽  
◽  
L.N. Budkar ◽  
V.B. Gurvich
Keyword(s):  
Mathematical Model ◽  
Early Diagnosis ◽  
Occupational Medicine ◽  
Preventive Measures ◽  
Occupational Activity ◽  
Health Maintenance ◽  
Occupational Risks ◽  
Somatic Diseases ◽  
Relationship Of ◽  
The Relationship

Abstract: Recent researches in the occupational medicine demonstrate a significant occurrence of cardiovascular and metabolic pathology. They are often associated with occupational activity in workers exposed to hazardous industries. The aim of the paper is to study the condition of somatic health in workers exposed to hazardous industries to identify the trends of preventive measures. Research methods. We studied the influence of somatic diseases in workers of aluminum, refractory and asbestos-processing industries for the development of occupational pathology. Results. The study has identified the relationship of some somatic diseases with work, as well as their influence on the development of occupational pathology: fluorosis, asbestos and silicosis. A predictive mathematical model of the development of arterial hypertension in workers exposed to hazardous industries is created. Conclusion. Therefore, an early diagnosis and prevention of the development of somatic diseases in workers is one of the key areas of current measures to reduce occupational risks.

Еarly diagnosis of multiple sclerosis: experience with the use of class G oligoclonal immunoglobulin

2021 ◽  
Vol 26 (3) ◽  
pp. 34-39
Author(s):  
Z. A. Goncharova ◽  
Y. Y. Pogrebnova ◽  
N. M. Yarosh ◽  
S. M.M. Sehweil
Keyword(s):  
Multiple Sclerosis ◽  
Early Diagnosis ◽  
Literature Review ◽  
Demyelinating Disease ◽  
Mcdonald Criteria ◽  
Mri Features ◽  
Oligoclonal Igg ◽  
Relationship Of ◽  
The Relationship

The article presents the literature review and our experience in early diagnosis of multiple sclerosis based on the updated McDonald criteria of 2017. The study included 256 patients with clinic symptoms of probable idiopathic infl ammatory demyelinating disease, including rare and atypical forms of demyelination. As a result of the study the sensitivity and specifi city of the determination of oligoclonal immunoglobulin G in the population of Rostov-on-Don was described for the fi rst time, including dependence of the duration of the disease. The relationship of clinical and MRI features of the fi rst attack of the disease with the probability of determining oligoclonal IgG in the cerebrospinal fl uid is refl ected

scholarly journals Relationship of Depression, Aging and Immune System During Covid-19 Pandemic: A Review

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Farah Iylia Binti Fauzi ◽  
Siti Fatimah Binti Salleh ◽  
Mohammad Shahadat Hossen
Keyword(s):  
Mental Health ◽  
Immune System ◽  
Elderly People ◽  
Social Isolation ◽  
Mental Health Problems ◽  
Preventive Measures ◽  
Coping Mechanisms ◽  
Depression And Anxiety ◽  
Relationship Of ◽  
The Relationship

COVID-19 is a highly contagious virus that first appeared in China in December 2019. It has affected over 157 million people and killed over 3.2 million. The paper reviews the function of the immune system for COVID-19 prevention, depression, and anxiety due to COVID-19 and their effects on the immune system and the relationship of aging with the immune system and depression and anxiety. It has been found that several elderly people lack the coping mechanisms required to deal with the stress caused by COVID-19. Hence, identifying the factors and mechanisms that lead to this resilience will aid in the development of preventive measures for certain elderly people and groups with more severe mental health problems. Additionally, it would be beneficial to understand how technology could be leveraged to accomplish this goal. During the pandemic, various steps such as social isolation, quarantine, and self-isolation are needed to be implemented properly to slow the spread of the virus. Meanwhile, to help halt the pandemic, everybody must be vaccinated as soon as possible until any bans on social gatherings and social isolation can be removed, allowing other sectors such as schooling, social activities, and life to resume normalcy.

scholarly journals Relation between swine weight and morphometric measurements

2020 ◽  
Vol 9 (9) ◽  
pp. e891998013
Author(s):  
Mônica Calixto Ribeiro de Holanda ◽  
Marco Aurélio Carneiro de Holanda ◽  
Leandro Ricardo Rodrigues de Lucena
Keyword(s):  
Mathematical Model ◽  
Body Weight ◽  
Regression Models ◽  
Hip Circumference ◽  
Morphometric Measurements ◽  
Large White ◽  
Male And Female ◽  
Lactation Phase ◽  
Relationship Of ◽  
The Relationship

Objective was to define a mathematical model that better explain the relationship of the animals weight depending not only on the animals age but also on the animals morphometric measurements. 40 piglets, half Duroc-Large White blood, were used, 20 males and 20 females, from 3 to 35 days of age (lactation phase) initially weighing 1.518 ± 0.121 kg and from 36 to 66 days of age (calving phase) with a body weight of 7.010 ± 0.704 kg. The animals were weighed weekly on a digital balance. The relationship of animal weight, age and morphometric measurements of male and female piglets were performed using regression models: existing, linear and power. The models were evaluated according to nine criterialinear model was the most adequate to explain the weight of male pigs, while for female pigs was the power. The age of the pig, the shank and palette length, as well as the circumference of the shank jointly explain the weight of the male piglets. The weight of females is explained jointly by age, body length, thorax and hip circumference.

Establishment of Relatively Unified Mathematical Model for Spiral Surface Based on Movement Characteristics of Particle

2010 ◽  
Vol 455 ◽  
pp. 1-5
Author(s):  
L.Z. Song ◽  
S.L. Guo ◽  
Chun Jiang Xiang ◽  
Qi Hong
Keyword(s):  
Mathematical Model ◽  
Surface Shape ◽  
Movement Characteristics ◽  
Spiral Surface ◽  
Relationship Of ◽  
First Time ◽  
The Relationship

From the viewpoint of the forming principle of spiral curve and classification from the kinematics, established relatively unified mathematical model of spiral curve based on the movement characteristics of particle and the forming principle of space surface shape, and in turn relying on relatively unified mathematical model of spiral curve, combined the similarity of forming movement between spiral curve and spiral surface, derived the relatively unified mathematical model of spiral surface with the concept of sequence of operator presented for the first time. The relatively unified mathematical model has been validated that it not only expressed the relationship of movement synthesis for commonly spiral surface’s forming movement, but also depicted new spiral surface to be required or named through changing parameters.

Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control

2012 ◽  
Vol 490-495 ◽  
pp. 1441-1445 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Li Zhe Guan ◽  
Kang Kang Li
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Rotary Valve ◽  
Exciting Frequency ◽  
Working Principle ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Valve Control

A kind of hydraulic exciter based on rotary valve control was studied in this paper, the composition of the exciter and its working principle were introduced, and the mathematical model of the system was established. The characters of the system were simulated using MATLAB. From the results of the simulation, we get the relationship of the amplitude of Vibration oil cylinder between the system’s pressure and the exciting frequency. The results can provide theoretical bases to design the hydraulic exciter.

Shaping Law and Motion Design in NC-ECM under Effect of Twiste Angle

2011 ◽  
Vol 128-129 ◽  
pp. 1010-1014
Author(s):  
Rui Wu ◽  
Dan Wen Zhang ◽  
Juan Sun
Keyword(s):  
Mathematical Model ◽  
Electrochemical Machining ◽  
Experimental Results ◽  
Working Face ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Motion Design

The twiste angle has a great effect on shaping law and stability of Numerical Controlled Electrochemical Machining (NC-ECM) process. In order to avoid the disadvantages caused by twiste angle, a methode of study shaping law by dispersing cathode working face in NC-ECM was proposed, and a mathematical model of the shaping law with the effects of twiste angle has been established in this paper. The mathematical model disclosed the relationship of twiste angle β, feeding velocity vf and thickness of removal material h in NC-ECM. Theoretical and experimental results show the the mathematical model of shaping law described in this paper can be considered as a useful reference and is helpful for the analysis of the NC-ECM and general ECM process.

scholarly journals Speckle-tracking echocardiography in early diagnosis of lipotoxic myocardial damage in epicardial obesity

2021 ◽  
Vol 27 (3) ◽  
pp. 269-278
Author(s):  
O. V. Gritsenko ◽  
G. A. Chumakova ◽  
E. V. Trubina
Keyword(s):  
Insulin Resistance ◽  
Early Diagnosis ◽  
Diastolic Dysfunction ◽  
Myocardial Fibrosis ◽  
Plasma Levels ◽  
Speckle Tracking ◽  
Myocardial Damage ◽  
Lv Diastolic Dysfunction ◽  
Relationship Of ◽  
The Relationship

Epicardial obesity (EO) can lead to lipotoxic myocardial damage with the development of myocardial fibrosis, which underlie the impairment of left ventricular (LV) diastolic function. The identification of markers of lipotoxic myocardial damage is important at an early preclinical stage for preventive measures. Objective. To study the relationship of plasma levels of markers of insulin resistance and lipotoxic fibrosis with the parameters of LV mechanics in patients with EO. We hypothesized that there are significant differences in plasma levels of markers of insulin resistance and myocardial fibrosis and that they are associated with the parameters of LV mechanics in EO. Design and methods. The study included 143 men. Inclusion criteria: general obesity I–III degree. Exclusion criteria: type 2 diabetes mellitus, hypertension, LV diastolic dysfunction based on echocardiography (Echo). Patients were divided into 2 groups: EO (+) with epicardial fat thickness (tEAT) ≥ 7 mm (n = 70); EO (–) with tEAT < 7 mm (n = 31). All patients were assessed for glucose, blood insulin, profibrotic factors and free fatty acids (FFA) using enzyme-linked immunosorbent assay. HOMA-IR insulin sensitivity index was calculated as (insulin × glucose)/22,5. With the help of speckle-tracking Echo, the mechanics of LV were studied (LV twisting, LV twisting ratio, time to LV twisting peak, LV untwisting ratio, time to LV untwisting peak). Results. The patients with EO (+) showed a statistically significant increase in the level of FFA up to 0,82 (0,39; 1,30) mmol/L (< 0,0001) and HOMA-IR index up to 3,89 (2,02; 5,76) (< 0,0001) in comparison with the group EO (–). There was a statistically significant effect of tEAT on the level of FFA (F = 7,90; p = 0,006) and on the development of insulin resistance (F = 14,85; p < 0,001). The correlation analysis in the EO (+) group showed the relationship between FFA and type III collagen (r = 0,29, p = 0,01) and procollagen type I carboxy-terminal propeptide (PICP) (r = 0,26, p = 0,03), as well as between HOMA-IR and MMP-3 (r = 0,30, p = 0,01). In the EO (–) group, the relationship of profibrotic factors with the level of FFA and HOMA-IR was not found. There was also a significant relationship between LV untwisting ratio and level of FFA (r = 0,24, p = 0,04) in the group EO (+). Conclusions. Thus, an increase in the level of FFA in patients with EO may be accompanied by an increase in the level of some profibrotic factors and a LV untwisting violation determined by speckle-tracking Echo. Our data supports the need for assessing the FFA level and speckle-tracking Echo for the early diagnosis of LV diastolic dysfunction in patients with EO.

Investigation on Silicon-Glass Electrostatic Bonding Time Experiment

2011 ◽  
Vol 483 ◽  
pp. 78-82
Author(s):  
Xiao Wei Liu ◽  
Jia Lu Tang ◽  
Rong Yan Chuai ◽  
Hai Feng Zhang ◽  
Xi Lian Wang
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Bonding Process ◽  
Bonding Time ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Electrostatic Bonding

In this paper, we make a detail analysis of some factors, which affects the electrostatic bonding process. According to the electrical properties of glass, combined with the principle of electrostatic bonding, we analysed the relationship of critical bonding time, voltage and temperature as well as the factors which affect electrostatic bonding. Then we come up with the mathematical model of the intensity and temperature of electrostatic bonding. In accordance with the above-mentioned formula and the experimental data, we can get the following conclusions: the intensity of electrostatic bonding is much greater between 280°C to 370°C; the best temperature for this bonding is about 350°C; however, when the temperature is below 280°C,the intensity of electrostatic bonding is lower due to the great impact of particles under low temperature; but when the temperature is higher than 370°C,the mismatch of coefficient of thermal expansion of silicon and glass gets larger, then as a result, the intensity of this bonding has a significant decrease with the increasing of temperature.

Effect of Tongue and Lip Motor Training for Cognitive Function in Older People: -The Relationship of Oral Function and Cognitive Function

2021 ◽  
Vol 5 (7) ◽  
Author(s):  
Minoru Innami ◽  
Masayo Okumura ◽  
Junichi Otogoto ◽  
Eiji Kondo ◽  
Norio Sogawa ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Older People ◽  
Whole Body ◽  
Motor Training ◽  
Health Maintenance ◽  
Occlusal Force ◽  
Oral Function ◽  
Masticatory Function ◽  
Relationship Of ◽  
The Relationship

Introduction: The oral function with many teeth affects the health maintenance of the whole body and brain activation of the older people. This study investigates the relationship between cognitive and oral functions, and the effect of tongue and lip motor training on cognitive function. Methods: One hundred subjects (age > 65) were investigated Mini-Mental State Examination (MMSE), their number of present teeth, masticatory function, occlusal force, and oral diadochokinesis (ODK), and correlations between their MMSE scores and the other factors were discussed. Fifteen subjects (5 non-impairment group: NIG, 10 impairment group: IG) participated in tongue and lip motor training three times daily for 15 months. Their MMSE scores, masticatory function, occlusal force, and ODK times were measured every three months. Results: Their MMSE scores correlated with age, number of present teeth, masticatory function, and ODK. Furthermore, multiple regression analysis showed that MMSE scores were strongly related to age and ODK. MMSE scores of IG were significantly higher after 15 months of pronunciation than before training and three months after training started. In both groups, ODK times after 15 months of training were significantly higher than before the training and three months training started. Their masticatory function and occlusal force in the IG showed no significant differences during the 15 months of training. Conclusions: The findings suggest that cognitive function may be related to oral function, especially pronunciation, and those 15 months of tongue and lip motor training is effective in improving cognitive and pronunciation functions.

Effect of cutting width on the optimum size of bars and boards when cutting sawlogs with sawing three bars of equal thickness and four pairs of side boards

10.12737/4517 ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 128-135 ◽  
Author(s):  
Агапов ◽  
Aleksandr Agapov
Keyword(s):  
Mathematical Model ◽  
Objective Function ◽  
Optimality Criterion ◽  
Constraint Equations ◽  
First Pass ◽  
Method Of Lagrange Multipliers ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Equal Thickness

There is a task of cutting optimization of sawlogs considering the width of cut. Output of sawn timber produced after the first pass of cutting sawlogs is chosen as optimality criterion. The objective function is represented as the sum of the cross-section of bars and planks. Such a mathematical model of the objective function establishes a relationship between size of bars and planks. Constraint equations represent the relationship of sawlogs diameter with the size of bars and boards, as well as the width of the cut. To solve the mathematical model the method of Lagrange multipliers is used.

Sign in / Sign up

Export Citation Format

Share Document