scholarly journals TAKING INTO ACCOUNT THE PARAMETERS OF AEROSOL EMISSIONS IN THE DEVELOPMENT TECHNOLOGICAL SOLUTIONS TO REDUCE THE IMPACT ON THE ENVIRONMENT

2021 ◽  
pp. 3-10
Author(s):  
Ivan Koziy ◽  
Leonid Plyatsuk ◽  
Larysa Hurets ◽  
Inna Trunova
Keyword(s):  
High Efficiency ◽  
Selection Process ◽  
Morphological Characteristics ◽  
Literary Sources ◽  
Reasonable Choice ◽  
Aerosol Emissions ◽  
Physical And Chemical ◽  
The Impact ◽  
Selection Of

The article discusses the issues of studying the parameters of various origins aerosol emissions in order to make a reasonable choice of appropriate technological solutions to reduce the impact on the environment. Based on the analysis of literary sources, a classical approach to the existing classification of aerosols considered: by the nature of the formation; by dispersion; by the state of aggregation of the dispersed phase; by morphological characteristics of particles; by particle concentration; by the nature of the impact on a person. Refinement of existing classifications was conducted based on the most important physical and chemical characteristics such as cohesiveness of particles, hygroscopicity, and ability to absorb additional substances from the environment which in turn is an important factor in the selection process of environmental solutions. Based on the analysis of aerosols classifications concluded possible solutions of the problem of selection of high-efficiency and reliable equipment capable for trapping fine dust with various physical and physicochemical parameters

Modeling to support physicochemical enhancement techniques

2021 ◽  
pp. 79-90
Author(s):  
Т. A. Pospelova
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil And Gas ◽  
Chemical Modeling ◽  
Comparative Structure ◽  
Water Cut ◽  
Physical And Chemical ◽  
Oil And Gas Companies ◽  
The Impact ◽  
Selection Of

The article discusses ways to increase the oil recovery factor in already developed fields, special attention is paid to the methods of enhanced oil recovery. The comparative structure of oil production in Russia in the medium term is given. The experience of oil and gas companies in the application of enhanced oil recovery in the fields is analyzed and the dynamics of the growth in the use of various enhanced oil recovery in Russia is estimated. With an increase in the number of operations in the fields, the requirements for the selection of candidates inevitably increase, therefore, the work focuses on hydrodynamic modeling of physical and chemical modeling, highlights the features and disadvantages of existing simulators. The main dependences for adequate modeling during polymer flooding are given. The calculation with different concentration of polymer solution is presented, which significantly affects the water cut and further reduction of operating costs for the preparation of the produced fluid. The possibility of creating a specialized hydrodynamic simulator for low-volume chemical enhanced oil recovery is considered, since mainly simulators are applicable for chemical waterflooding and the impact is on the formation as a whole.

scholarly journals THE WAYS OF COOPERATION BETWEEN DOCTORS OF THE UKRAINIAN DIASPORA IN CANADA AND DOCTORS IN UKRAINE IN THE CONDITIONS OF MODERN CHALLENGES

2021 ◽  
pp. 67-72
Author(s):  
Myroslava Marushchenko
Keyword(s):  
International Cooperation ◽  
High Efficiency ◽  
Local Level ◽  
State Regulation ◽  
Political Life ◽  
Practical Training ◽  
Fellowship Program ◽  
Charitable Organizations ◽  
The Impact ◽  
Selection Of

In the article, the current state of cooperation between Canadian Ukrainians and Ukrainian doctors analyzes. The urgency of modern challenges for cooperation is determined, in particular: pandemic restrictions due to the rapid spread of Covid-19 virus and a sharp restriction of direct professional contacts; the politicization of professional international cooperation in the conditions of Russian aggression; bureaucracy on the part of the management of medical institutions of Ukraine, unfinished state regulation of charitable organizations and international cooperation; insufficient development of charity in Ukraine. The activity of the main Cooperation programs between doctors Canadian Ukrainians and Ukrainian doctors is analyzed. The main focus of the article is on the analysis of the effectiveness of the Canadian-Ukrainian Pediatric Fellowship Program. The Medical Director of the Program is Professor James Rutka, and the Program Coordinator is Professor Myroslava Romach. The stages of organizing training meetings within the Program are indicated: planning and preparation for the meeting (goal setting and detailed planning); choice of locations, according to pre-thought-out criteria; the meeting itself (lectures and practical training, joint operations in 7 cities of Ukraine); further observation, assessment of the impact and results of the meeting, as well as planning of long-term cooperation. Analysis of the concrete results of cooperation is one of the most important stages of international cooperation, as it not only increases its efficiency but also ensures the targeted use of funds. It is determined that important factors that increase the effectiveness of interstate programs in the field of medicine are awareness of cooperation at the diplomatic level, coordinated cooperation at the local level, selection of reliable partners for cooperation, systematic contacts, activities, targeted, premeditated assistance, careful selection of applicants, changes in the means of communication in today's challenges. The work of the above-mentioned medical Ukraine Paediatric Fellowship Program can serve as an example of the organization of international cooperation in various directions of social and political life of modern Ukraine, and a guarantee of its high efficiency in clear strategic planning.

Morphometric analysis of myofibre development in the adductor femoris muscle of single and twin fetal lambs

2000 ◽  
Vol 12 (6) ◽  
pp. 329 ◽  
Author(s):  
S. A. McCoard ◽  
W. C. McNabb ◽  
S. W. Peterson ◽  
S. N. McCutcheon ◽  
P. M. Harris
Keyword(s):  
Sampling Site ◽  
Muscle Growth ◽  
Morphological Characteristics ◽  
Distal Region ◽  
Fetal Life ◽  
Cross Sectional ◽  
The Impact ◽  
Femoris Muscle ◽  
Selection Of

Cellular development of the adductor femoris muscle from twin and single fetuses was studied at 140 days gestation to evaluate the effect of moderate fetal growth retardation on myofibre development. Twin fetuses had lower bodyweights (13%) and disproportionately small adductor femoris muscle weights (22%) compared with single fetuses. Reduced muscle mass was associated with smaller myofibre cross-sectional areas (CSA) and lower DNA content (22%), indicative of fewer myonuclei and retarded myofibre hypertrophy. Myofibre number and the phenotypic maturation of the myofibres were similar between twins and singletons. These results indicate that even modest growth restriction during fetal life can negatively influence myofibre hypertrophy, highlighting the importance of fetal nutrition for muscle growth. Large muscles, such as the adductor femoris, have intrafascicularly terminating myofibres, which necessitates accurate sampling of the muscle when investigating possible perturbations in morphological characteristics (e.g. between singletons and twins). The second objective of the present study was to investigate the impact of the sampling site on the morphological parameters of the adductor femoris muscle. The apparent total myofibre number decreased from the proximal to the distal region of the adductor femoris muscle. The apparent number of slow-twitch fibres also decreased from the proximal to the medial region, but was not different between the medial and distal regions of the muscle. Similarly, myofibre CSA differed between the medial and distal regions. These results indicate that, particularly with large muscles, such as the adductor femoris, which has intrafascicularly terminating myofibres, single site sampling for the determination of morphological fibre characteristics may generate misleading results and that careful selection of the sampling area may be necessary.

scholarly journals Effect of single tube sections on the structural safety of Chinese solar greenhouse skeletons

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xingan Liu ◽  
Zhenkun Li ◽  
Lei Zhang ◽  
Yu Liu ◽  
Yiming Li ◽  
...  
Keyword(s):  
Material Selection ◽  
Selection Process ◽  
Load Condition ◽  
Structural Features ◽  
Structural Safety ◽  
Element Analysis ◽  
Cross Sectional ◽  
Single Tube ◽  
The Impact ◽  
Selection Of

AbstractIn recent years, the use of single-tube skeletons for the construction of Chinese solar greenhouses has increased. As a consequence, during the selection of the construction materials, the safety of these structures has become an important issue. The single tube section has various forms, but there is no scientific theory to guide the selection process. To the best of our knowledge, the scientific analysis of the impact of single pipe cross section on the safety of greenhouse skeleton has not been addressed so far. In this context, the finite element analysis software was used to calculate and analyze the stress elements, displacement of round tube, Ω tube, elliptic tube and square tube under the same load conditions. We used the Chinese Standard values as a reference and analyzed structural features of different sizes and thicknesses of the greenhouse steel skeleton sections under non-uniform snow load. The results showed that, under the same load condition, the maximum stress in the four skeleton materials was all located at the connection of the transverse tension bar and the front roof. In addition, under same load condition, the greenhouse skeleton with elliptic tube presented the smallest cross-sectional displacement between the different materials tested. The effect of increasing the size of the greenhouse frame was better than that of increasing the greenhouse material thickness. All this work will provide theoretical guidance to the material selection of this structure.

scholarly journals Automatic Classification of Chickpea Varieties Using Computer Vision Techniques

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 672 ◽  
Author(s):  
Pourdarbani ◽  
Sabzi ◽  
García-Amicis ◽  
García-Mateos ◽  
Molina-Martínez ◽  
...  
Keyword(s):  
Computer Vision ◽  
Morphological Characteristics ◽  
Texture Features ◽  
Correct Classification Rate ◽  
Classification Rate ◽  
Swarm Optimization ◽  
Visual Classification ◽  
Image Patches ◽  
Selection Of

There are about 90 different varieties of chickpeas around the world. In Iran, where this study takes place, there are five species that are the most popular (Adel, Arman, Azad, Bevanij and Hashem), with different properties and prices. However, distinguishing them manually is difficult because they have very similar morphological characteristics. In this research, two different computer vision methods for the classification of the variety of chickpeas are proposed and compared. The images were captured with an industrial camera in Kermanshah, Iran. The first method is based on color and texture features extraction, followed by a selection of the most effective features, and classification with a hybrid of artificial neural networks and particle swarm optimization (ANN-PSO). The second method is not based on an explicit extraction of features; instead, image patches (RGB pixel values) are directly used as input for a three-layered backpropagation ANN. The first method achieved a correct classification rate (CCR) of 97.0%, while the second approach achieved a CCR of 99.3%. These results prove that visual classification of fruit varieties in agriculture can be done in a very precise way using a suitable method. Although both techniques are feasible, the second method is generic and more easily applicable to other types of crops, since it is not based on a set of given features.

Small-bioreactor platform technology as a municipal wastewater additive treatment

2013 ◽  
Vol 69 (3) ◽  
pp. 504-510 ◽  
Author(s):  
Ofir Menashe ◽  
Eyal Kurzbaum
Keyword(s):  
Biological Treatment ◽  
Municipal Wastewater ◽  
Selection Process ◽  
Study Results ◽  
Different Types ◽  
Selective Forces ◽  
The Stability ◽  
Physical And Chemical ◽  
The Impact ◽  
The Relationship

The bioaugmentation treatment approach presents both an economical and environmentally friendly solution for wastewater treatment. However, the use of exogenous bacterial cultures presents several limitations: negative interaction between microorganisms and adaptation to new physical and chemical composite environment. These selective forces create a significant challenge for the introduced culture to achieving the required biomass in order to conduct the target biological treatment. Small-bioreactor platform (SBP) technology is aimed at introducing exogenous bacterial culture with some protection to reduce some of the natural selection process. The current study was aimed at validating the use of SBP technology to improve biological treatment, especially during a stress period, by using macro-encapsulated bioaugmentation treatment. The study results indicate that the use of SBP technology elevates the stability of biological treatment, improving operational factors such as the reduction of foaming phenomena and sludge accumulation. Still, a significant study needs to be conducted to understand the potential of this technology; especially the impact on biological treatment by using different types of microorganisms for different types of wastewaters and the relationship between the biomass within the SBP capsules and the natural microorganisms.

scholarly journals On-line Detection and Classification of PMSM Stator Winding Faults Based on Stator Current Symmetrical Components Analysis and the KNN Algorithm

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1786
Author(s):  
Przemyslaw Pietrzak ◽  
Marcin Wolkiewicz
Keyword(s):  
High Efficiency ◽  
Dynamic Properties ◽  
Stator Winding ◽  
Electric Motors ◽  
Permanent Magnet Synchronous Motors ◽  
K Nearest Neighbors ◽  
Short Circuits ◽  
Drive Systems ◽  
The Impact

The significant advantages of permanent magnet synchronous motors, such as very good dynamic properties, high efficiency and power density, have led to their frequent use in many drive systems today. However, like other types of electric motors, they are exposed to various types of faults, including stator winding faults. Stator winding faults are mainly inter-turn short circuits and are among the most common faults in electric motors. In this paper, the possibility of using the spectral analysis of symmetrical current components to extract fault symptoms and the machine-learning-based K-Nearest Neighbors (KNN) algorithm for the detection and classification of the PMSM stator winding fault is presented. The impact of the key parameters of this classifier on the effectiveness of stator winding fault detection and classification is presented and discussed in detail, which has not been researched in the literature so far. The proposed solution was verified experimentally using a 2.5 kW PMSM, the construction of which was specially prepared for carrying out controlled inter-turn short circuits.

scholarly journals Single-cell analysis reveals selection of TP53-mutated clones after MDM2 inhibition

2022 ◽  
Author(s):  
Nabih Maslah ◽  
Emmanuelle Verger ◽  
Stéphane Giraudier ◽  
Mathias Chea ◽  
Ronald Hoffman ◽  
...  
Keyword(s):  
Single Cell ◽  
Single Cell Analysis ◽  
Selection Process ◽  
Myeloproliferative Neoplasms ◽  
Clonal Evolution ◽  
In Vitro Test ◽  
Tp53 Mutations ◽  
The Impact ◽  
Selection Of

The mechanisms of transformation of chronic myeloproliferative neoplasms (MPN) to leukemia are largely unknown but TP53mutations acquisition is considered a key event in this process. P53 is a main tumor suppressor but mutations in this protein per se do not confer a proliferative advantage to the cells and a selection process is needed for the expansion of mutant clones. MDM2 inhibitors may rescue normal p53 from degradation and have been evaluated in a variety of cancers with promising results. However the impact of these drugs on TP53 mutated cells is underexplored. We report herein evidence of a direct effect of MDM2 inhibition on the selection of MPN patients' cells harboring TP53 mutations. To decipher whether these mutations can arise in a specific molecular context we used a DNA single cell approach to determine the clonal architecture of TP53 mutated cells. We observed that TP53 mutations are late events in MPN mainly occurring in the driver clone while clonal evolution frequently consists of sequential branching instead of linear consecutive acquisition of mutations in the same clone. At the single cell level the presence of additional mutations does not influence the selection of TP53 mutant cells by MDM2 inhibitor treatment. Also, we describe an in vitro test allowing to predict the emergence of TP53 mutated clones. Altogether, this is the first demonstration that a drug treatment can directly favor the emergence of TP53-mutated subclones in MPN.

scholarly journals Improvement of Convolutional Neural Network Accuracy on Salak Classification Based Quality on Digital Image

2019 ◽  
Vol 13 (2) ◽  
pp. 189 ◽  
Author(s):  
Muhammad Faqih Dzulqarnain ◽  
Suprapto Suprapto ◽  
Faizal Makhrus
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Digital Image ◽  
Selection Process ◽  
Noise Removal ◽  
Classification Model ◽  
Accuracy Improvement ◽  
Zero Padding ◽  
Selection Of

Salak is a seasonal fruit that has high export value. The success of salak fruit exported is influence by selection process, but there is still a problem in it. The selection of salak still done manually and potentially misclassified. Research to automate the selection of salak fruit has been done before. The process of selection this salak fruits used convolutional neural network (CNN) based on image of salak fruits. The resulting of accuracy value from previous research is 70.7% for four class classification model and 81.45% for two class classification model. This research was conducted to increase accuracy value the classification of salak exported based on previous research. Accuracy improvement by changing the noise removal process to produce a better image. The changing also occur in the CNN architecture that layer convolution is more deep and with additional parameters such as Stride, Zero Padding, and Adam Optimizer. This change hopefully can increase the accuracy value of the salak classification. The results showed an accuracy value increased 22.72% from 70.70% to 93.42% for the category of four classes CNN models and increased 13,29% from 81.45% to 94.74% for category two classes.

Wired and Cable Networks of Fire-hazardous Zones

2021 ◽  
pp. 63-68
Author(s):  
G.I. Smelkov ◽  
◽  
V.A. Pekhotikov ◽  
A.I. Ryabikov ◽  
A.A. Nazarov ◽  
...  
Keyword(s):  
Fire Protection ◽  
Fire Hazard ◽  
Correct Selection ◽  
Federal State ◽  
Normative Documents ◽  
Electric Equipment ◽  
Civil Defence ◽  
The Impact ◽  
Selection Of

The urgency of the issue to be considered is conditioned by the high fire hazard of electric cables of the voltage up to 1000 V. As a result of fires associated with this type of products at the industrial and storage units in 2020 in Russia, the volume of direct loss exceeded 68 % comparing to the fires caused by all other types of cable lines occurred at enterprises. The high fire hazard of industrial facilities is mainly associated with numerous fire-hazardous premises containing combustible media capable of inflammation under the impact of ignition sources. In order to reduce their fire hazard, two independent and mutually reinforcing systems of fire-hazardous premise classification applied at designing such units are developed: Identification of fire-hazardous zone’s class to ensure correct selection of electric equipment and level of its fire-protection. Categorization of buildings and premises as fire-hazardous to ensure fire protection for both for buildings and attending employees. The main regulatory document where the requirements to fire-hazardous zone classification and selection of relevant fire-protected equipment were initially stipulated is the Rules for electric installations (1980). In 2008, the updated version of the Rules was incorporated into the text of the Federal Law of June 22, 2008 № 123-FZ «The technical regulation on fire safety requirements». The studies conducted by the experts of The Federal State Budgetary Establishment «All-Russian Research Institute for Fire Protection of the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters» of Russia serves as a basis to develop normative documents regulating categorization of fire-hazardous premises and classification of fire-hazardous zones as well as the recommendations on the scope of application of some electric equipment in fire-hazardous zones. The adopted classification of fire-hazardous zones is unique and has no analogues in global practices.

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