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Tytuł:
Bio-demographic characteristics of households and risk factors for Down Syndrome in Morocco
Autorzy:
Oulmane, Z.
Cherkaoui, M.
Belahsen, R.
Hilali, M.K.
Powiązania:
https://bibliotekanauki.pl/articles/28763554.pdf
Data publikacji:
2023
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. The most studied risk factors for Down Syndrom (DS) were: region of residence, exposure to chemicals, parents’ education level, cigarette and alcohol use by father or mother or both, and oral contraceptive (OC) use. Objective. The aim of this study was to compare certain variables considered as risk factors on DS such as parental age at birth, OC use, child’s sex, and rank of birth between children with DS and their siblings without DS as well as to determine the socio-bio-demographic characteristics of the families studied compared with the general Moroccan population. Material and Methods. We conducted a cross-sectional analysis of 277 families with 925 siblings and at least one child with DS (279 with DS) between 2014 and 2017. The data are collected using a standardized questionnaire in Marrakech-Safi region. Data were entered and analyzed using the statistical program SPSS statistics software for Windows (version 20.0). Chi-square (χ2) and Student t tests were used for testing statistical significance. Differences were considered significant when the p-value <0.05. Results. The binary logistic regression analysis between DS and non-DS children in their bio-demographic characteristics studied (sex, maternal age at birth, paternal age at birth, oral contraceptive (OC) use, length of oral contraceptive use before pregnancy and rank of birth) showed that only maternal age and paternal age at birth and OC use were associated with DS birth (OR= 1.16; 95% CL: 1.11-1.21, OR= 1.05; 95%CL: 1.01-1.09 and OR= 0.01; 95%CL: 0.00-0.003, respectively). In the other hand, the comparison between socio and bio-demographic characteristics of households studied with data from National Population Survey and Family health (2018) showed a higher level of education in women and men in our sample. Similar results were shown in rate of men and women in paid employment, the rate of smoking and alcohol consumption among men and the rate of OC use before pregnancy among women. Conclusion. These results will help to sensitize the Moroccan population about risk factors for DS.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2023, 74, 4; 415-420
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contamination of the Šar Mountains Aquatorium – Kosovo with Depleted Uranium
Autorzy:
Stanojević, Nenad Z.
Đokić, Jelena V.
Lazarević, Đorđe R.
Nikezić, Dušan P.
Osmokrović, Predrag V.
Powiązania:
https://bibliotekanauki.pl/articles/27315741.pdf
Data publikacji:
2023
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
environmental risk
health risk assessment
soil contamination
water contamination
depleted uranium
radiation survey
Kosovo
Opis:
The main objective of this study was to estimate the environmental and health risk of the Šar Mountains (Kosovo) for depleted uranium contamination. The risk assessment of the contamination is needed since, in the spring of 1999, conflict with bombarding took place in the territory of the Western Balkans, during which depleted uranium ammunition was used. In Serbia and Montenegro, such tests were performed; based on them, some territories were decontaminated. Šar Mountains is particularly important as it is one of the few water-rich areas in Kosovo. Therefore, soil and water samples were taken from characteristic places in the Šar Mountains aquatorium. Tests of the samples were performed under well-controlled conditions. The measurement uncertainty was less than 5%. Based on the obtained results, it was concluded that there was no contamination of the Šar Mountains with depleted uranium. This conclusion can be extended to the broader area around the Šar Mountains, as it is a safe area surrounded by high mountains
Źródło:
Rocznik Ochrona Środowiska; 2023, 25; 1--8
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Historyczne dziedzictwo lwowskiej uczelni weterynaryjnej na Ziemi Podkarpackiej
Autorzy:
Strokoń, R.
Wróblewski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/28763371.pdf
Data publikacji:
2023
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
weterynaria
Szkola Weterynaryjna we Lwowie
dziedzictwo
Podkarpacie
lekarze weterynarii
absolwenci
praca
Olbrycht Piotr
Olbrycht Tadeusz Maria C.
Ladyzynski Bohdan
Haspel Mieczyslaw
Ojak Kazimierz Alojzy
Ojak Ziemowit
Ojak-Zwirn Monika
biografie
Źródło:
Życie Weterynaryjne; 2023, 98, 06; 376-382
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics models of hydrogen sulphide adsorption from hydrogel biochar derived from empty fruit bunch (EFB)
Autorzy:
Alias, A.B.
Ariffin, A.Y.
Norain, N.M.R.
Rashid, Z.A.
Powiązania:
https://bibliotekanauki.pl/articles/24200629.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
hydrogen sulphide
adsorption
kinetics models
empty fruit bunch
hydrogel
siarkowodór
adsorpcja
modele kinetyki
pusta kiść owoców
hydrożel
Opis:
Purpose: This research aims to investigate the detailed state of adsorption kinetics modelling and research on the application of hydrogen sulfide adsorption by hydrogel derived from empty fruit bunch (EFB), the determination of the kinetics parameters, and the comparison between models in a selection of the best-fit model. Design/methodology/approach: The kinetics modelling used are pseudo-first-order and pseudo-second-order models. The correlation coefficient was used to evaluate the suitability of the equation R2. After obtaining the results, the comparison was made by comparing the R2 of each model. The pseudo-second-order model has a higher value of correlation coefficient, R2, making it the most suitable kinetics model for adsorption systems. Findings: The R2 for pseudo-first-order on the effect of dry bed height was 0.8814, whereas its effect on powder bed height was 0.9537, and that of the wet bed height was 0.9607. Meanwhile, the R2 for pseudo-second-order on the effect of dry bed height was 0.89, on the effect of the powder bed height was 0.99, and on the effect of the bed height of wet was 0.99, the highest among kinetic models. Based on the results, the pseudo-second-order model best describes the adsorption of hydrogen sulfide (H2S) by hydrogel biochar. Research limitations/implications: The kinetics modelling used are pseudo-first-order, and pseudo-second-order models for hydrogen sulfide adsorption by hydrogel originating from empty fruit bunches (EFB). Practical implications: Based on the results, the pseudo-second-order model best describes the adsorption of hydrogen sulfide (H2S) by hydrogel biochar. Kinetic studies are important in understanding the reactions and design of the process. Originality/value: The authenticity results of this article were found to be 17% similar. The novelty of this paper is the kinetics study of the new adsorbent developed based on EFB to adsorb H2S.
Źródło:
Archives of Materials Science and Engineering; 2023, 120, 1; 15--21
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of laminar-to-turbulent transition in a separated boundary layer subjected to an external acoustic forcing
Autorzy:
Kubacki, S.
Rarata, Z.
Drózdz, A.
Gnatowska, R.
Sokolenko, V.
Elsner, W.
Powiązania:
https://bibliotekanauki.pl/articles/38697107.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
laminar-to-turbulent transition
separated boundary layer
acoustic excitation
algebraic intermittency model
Opis:
The new Reynolds-averaged Navier–Stokes (RANS)-based method has been developed for taking into account, in an approximate manner, the effect of external acoustic forcing on laminar-to-turbulent transition in a separated boundary layer. Experimental studies [33] report an increase of the turbulent shear stress within the separated boundary layer under the influence of acoustic forcing. Enhancement of flow disturbances in a reversed flow region was also reported in our experiment. Experimental findings stimulated the development of a reduced-order aero-acoustic strategy. The effect of acoustic forcing was incorporated into the modelling framework of an algebraic intermittency model. The model component was tuned based on our experimental data and validated on reference experiments. The results show the feasibility of the proposed model to simulate flow over a flat plate and the NACA0018 profile.
Źródło:
Archives of Mechanics; 2023, 75, 5; 591-616
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence and predictive determinants of overweight and obesity in children aged 0-24 months in Morocco: a cross-sectional study
Autorzy:
Benayad, F.Z.
El Hilali, S.
Razine, R.
Idrissi, K.S.
Abouqal, R.
Belhaj, H.
Kharbach, A.
Obtel, M.
Powiązania:
https://bibliotekanauki.pl/articles/28765152.pdf
Data publikacji:
2023
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. Preventing overweight and obesity in early childhood is a priority for healthcare systems worldwide due to the harmful effects on health and economy over the medium and long term. Objective. The aim of this study is therefore the identification of the determinants predictive of overweight and obesity during the first 24 months of a child’s life. Material and Methods. From May 2021 to January 2022, 1012 mother-child pairs were included in this study and were interviewed at urban and rural health centers in the Skhirat-Temara in Morocco prefecture using a questionnaire. The anthropometric measurements of the children were also taken according to World Health Organization standards. Results. The prevalence of overweight and obesity in children aged 0-24 months was 16.5%. This prevalence increased with age (12.5% for the 0-6 months group, and 15.5% and 21.5% respectively for the 7-12 months and 13-24 months groups). Cesarean delivery (aOR=1.78; 95%CI: 1.26-2.51; p=0.001), more than two living siblings in the household (aOR=1.48; 95%CI: 1.03-2.12; p=0.03), male gender (aOR=1.56; 95%CI: 1.10-2.20; p=0.01), and child age (aOR=0.94; 95%: 0.92-0.97; p<0.001) are significant predictors of overweight and obesity. Paternal smoking (aOR=2.16; 95%CI: 1.15- 4.06; p=0.01), short sleep duration (aOR=4.05; 95%CI: 1.27-12.88; p=0.01) in children aged 7-12 months, and combined breastfeeding (aOR=5.88; 95%CI: 2.07-16.72; p<0.001) during the first six months in children aged 13-24 months are also predictive determinants for this problem. Conclusion. The identification of early predictors of overweight and obesity can be used by public health decision-makers as a roadmap for action to prevent and improve health.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2023, 74, 4; 395-406
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of remote sensing data sources and GIS in fire protection planning in Biebrza National Park, with special attention to non-forest ecosystems
Autorzy:
Korzybski, D.
Mielcarek, M.
Szczygieł, R.
Kwiatkowski, M.
Piasecka, Ż.
Guderski, K.
Kurpiewska, S.
Kuśnierz, H.
Powiązania:
https://bibliotekanauki.pl/articles/28407562.pdf
Data publikacji:
2023
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2023, 65, 1; 48-54
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Boosting-based model for solving Sm-Co alloy’s maximum energy product prediction task
Autorzy:
Trostianchyn, A.M.
Izonin, I.V.
Duriagina, Z.A.
Tkachenko, R.O.
Kulyk, V.V.
Havrysh, B.M.
Powiązania:
https://bibliotekanauki.pl/articles/24200577.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
Sm-Co alloy
ensemble learning
gradient boosting
prediction accuracy
Stop Sm-Co
uczenie zespołowe
dokładność przewidywania
Opis:
Purpose: This paper aims to decide the Sm-Co alloy’s maximum energy product prediction task based on the boosting strategy of the ensemble of machine learning methods. Design/methodology/approach: This paper examines an ensemble-based approach to solving Sm-Co alloy’s maximum energy product prediction task. Because classical machine learning methods sometimes do not supply acceptable precision when solving the regression problem, the authors investigated the boosting ML model, namely Gradient Boosting. Building a boosting model based on several weak submodels, each of which considers the errors of the prior ones, provides substantial growth in the accuracy of the problem-solving. The obtained result is confirmed using an actual data set collected by the authors. Findings: This work demonstrates the high efficiency of applying the ensemble strategy of machine learning to the applied problem of materials science. The experiments determined the highest accuracy of solving the forecast task for the maximum energy product of Sm-Co alloy formed on the boosting model of machine learning in comparison with classical methods of machine learning. Research limitations/implications: The boosting strategy of machine learning, in comparison with single algorithms of machine learning, requires much more computational and time resources to implement the learning process of the model. Practical implications: This work demonstrated the possibility of effectively solving Sm-Co alloy’s maximum energy product prediction task using machine learning. The studied boosting model of machine learning for solving the problem provides high accuracy of prediction, which reveals several advantages of their use in solving issues applied to computational material science. Furthermore, using the Orange modelling environment provides a simple and intuitive interface for using the researched methods. The proposed approach to the forecast significantly reduces the time and resource costs associated with studying expensive rare earth metals (REM)-based ferromagnetic materials. value: The authors have collected and formed a set of data on predicting the maximum energy product of the Sm-Co alloy. We used machine learning tools to solve the task. As a result, the most increased forecasting precision based on the boosting model is demonstrated compared to classical machine learning methods.
Źródło:
Archives of Materials Science and Engineering; 2022, 116, 2; 71--80
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcium (Ca2+) expression and intensity in cumulus-oocyte complex (COCs) in Kacang goat after vitrification
Autorzy:
Widjiati, W.
Faizah, Z.
Darsini, N.
Hendrawan, V.F.
Karima, H.N.
Chotimah, C.
Sumitro, S.B.
Yustinasari, L.R.
Kasman, A.A.M.N.
Ntoruru, J.M.
Luqman, E.M.
Powiązania:
https://bibliotekanauki.pl/articles/16539072.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Calcium (Ca2+)
confocal laser scanning microscope
cumulus-oocyte complex (COCs)
food production
Kacang goat
Opis:
The process of vitrification of the cumulus-oocyte complex (COCs) often results in cold shock. When warming, heat shock occurs which can disrupt the balance of intracellular calcium (Ca2+) intensity. Drastic changes in temperature cause Reactive Oxygen Species (ROS), affecting changes on Ca2+ in COCs. The role of calcium is needed for oocyte activation in the fertilization process. The purpose of this study was to measure the expression of Ca2+ and the intensity of Ca2+ in COCs after vitrification. The study was divided into 2 groups, the control group (C) of fresh COCs, and the treatment group (T) of COCs after vitrification. After vitrification for 24 hours, then thawing, the expression of Ca2+ was examined using the Immunocytochemistry (ICC) method and the intensity of calcium (Ca2+) with a Confocal Laser Scanning Microscope (CLSM). The research data obtained were analyzed statistically by T-Test. The results showed that the expression of Ca2+ in the control group (12.00±0.00) was different from the treatment group (0.35±0.79). The intensity of Ca2+ in the control group (1059.43±489.59) was different from the treatment group (568.21±84.31). The conclusion of this study is that cryopreservation affects calcium in COCs; there were differences in the expression and the intensity of Ca2+ between fresh COCs and COCs after vitrification. Ca2+ intensity of COCs after vitrification was concentrated in the nucleus, while in fresh COCs it was concentrated in the cytoplasm.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 1; 19-26
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of hydrogel- and xerogel-based sorbent from Empty Fruit Bunch (EFB)
Autorzy:
Alias, A.B.
Qarizada, D.
Malik, N.S.A.
Noraini, N.M.R.
Rashid, Z.A.
Powiązania:
https://bibliotekanauki.pl/articles/24200604.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
biomass
hydrogel
empty fruit bunch
xerogel
sorbent
biomasa
hydrożel
pusta kiść owoców
kserożel
Opis:
Purpose: This paper focuses on the synthesis and comparison of hydrogel- and xerogel-based sorbents from EFB. Design/methodology/approach: Hydrogels were synthesised by polymerisation of EFB biochar with acrylamide (AAm) as a monomer, N, N'-Methylenebisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as initiator, as well as by internal gelation method of sodium alginate, empty fruit bunch (EFB), calcium carbonate (CaCO3), and glucono delta-lactone (GDL). From the alginate hydrogels obtained, xerogels were synthesised via the oven-drying method. Then, EFB-based hydrogel and xerogel sorbents were analysed and compared based on characterisation analysis by using scanning electron microscopy (SEM), Brunauer− Emmett−Teller (BET), Fourier-Transform Infrared Spectroscopy (FTIR), and thermogravimetric analysis (TGA). Findings: The xerogel-based EFB is a better adsorbent than the hydrogel-based EFB because it has a larger pore volume (0.001449 cm3/g), larger pore size (63.7987 nm), higher moisture content (7.97%), lower ash content (12.55%), and is more thermally stable. Research limitations/implications: The research is to compare two new adsorbents, namely Hydrogel and Xerogel, from EFB in terms of their characteristics. Practical implications: Both adsorbents show a highly toxic material uptake, especially EFB xerogel. This adsorbent is comparable with the other commercialised adsorbent. Thus, this product can be a highly potential adsorbent for gas and wastewater adsorption. Originality/value: The authenticity results of this article were found to be 15% similar. The novelty of this paper is to compare the two adsorbents, namely hydrogel and xerogel, that originated from EFB.
Źródło:
Archives of Materials Science and Engineering; 2022, 118, 2; 49--60
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of conditions for loss of bearing capacity of underground ammonia pipelines based on the monitoring data and flexible search algorithms
Autorzy:
Mysiuk, R.V.
Yuzevych, V.M.
Yasinskyi, M.F.
Kniaz, S.V.
Duriagina, Z.A.
Kulyk, V.V.
Powiązania:
https://bibliotekanauki.pl/articles/24200550.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
underground ammonia pipeline
pump station
thermal background
corrosion current
data processing
cloud computing
podziemny rurociąg amoniaku
stacja pomp
tło termiczne
prąd korozyjny
przetwarzanie danych
chmura obliczeniowa
Opis:
Purpose: The study aims to diagnose the corrosion current density in the coating defect on the outer surface of the ammonia pipe depending on the distance to the pumping station, taking into account the interaction of media at the soil-steel interface and using modern graphical data visualization technologies and approaches to model such a system. Design/methodology/approach: The use of an automated system for monitoring defects in underground metallic components of structures, in particular in ammonia pipelines, is proposed. The use of the information processing approach opens additional opportunities in solving the problem of defect detection. Temperature and pressure indicators in the pipeline play an important role because these parameters must be taken into account in the ammonia pipeline for safe transportation. The analysis of diagnostic signs on the outer surface of the underground metallic ammonia pipeline is carried out taking into account temperature changes and corrosion currents. The parameters and relations of the mathematical model for the description of the influence of thermal processes and mechanical loading in the vicinity of pumping stations on the corresponding corrosion currents in the metal of the ammonia pipeline are offered. Findings: The paper evaluates the corrosion current density in the coating defect on the metal surface depending on the distance to the pumping station and the relationship between the corrosion current density and the characteristics of the temperature field at a distance L = 0…20 km from the pumping station. The relative density of corrosion current is also compared with the energy characteristics of the surface layers at a distance L = 0…20 km from the pumping station. An information system using cloud technologies for data processing and visualization has been developed, which simplifies the process of data analysis regarding corrosion currents on the metal surface of an ammonia pipeline. Research limitations/implications: The study was conducted for the section from the pumping station to the pipeline directly on a relatively small data set. Practical implications: The use of client-server architecture has become very popular, thanks to which monitoring can be carried out in any corner of the planet, using Internet data transmission protocols. At the same time, cloud technologies allow you to deploy such software on remote physical computers. The use of the Amazon Web Service cloud environment as a common tool for working with data and the ability to use ready-made extensions is proposed. Also, this cloud technology simplifies the procedure of public and secure access to the collected information for further analysis. Originality/value: Use of cloud environments and databases to monitor ammonia pipeline defects for correct resource assessment.
Źródło:
Archives of Materials Science and Engineering; 2022, 115, 1; 13--20
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a grinding device for producing coal powder-raw materials of coal-water fuel
Autorzy:
Kurytnik, Igor P.
Khassenov, Ayanbergen K.
Nussupbekov, Ulan B.
Karabekova, Dana Z.
Nussupbekov, Bekbolat R.
Bolatbekova, Madina
Powiązania:
https://bibliotekanauki.pl/articles/2172769.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coal-water fuel installation
electric pulse installation
grinding device
degree of coal
grinding
electrode
instalacja paliwowa węgiel-woda
instalacja impulsów elektrycznych
urządzenie do szlifowania
stopień węgla
szlifowanie
elektroda
Opis:
This article proposes a method for grinding coal based on the use of the energy of a pulsed shock wave resulting from a spark electric discharge in a liquid. The main purpose of the scientific work is the development of an electric pulse device for producing coal powder, the main component of coal-water fuel. The diameter of the initial coal fraction averaged 3 mm, and the size of the resulting product was 250 μm. To achieve this goal, the dependence of the length of a metal rod electrode (positive electrode) on the length and diameter of its insulation is investigated. Various variants of the shape of the base (bottom) of the device acting as a negative electrode are considered, and an effective variant based on the results of coal grinding is proposed. An experimental electric pulse installation is described, the degree of coal grinding is determined depending on the geometric parameters. The optimal characteristics of the obtained coal powder have been established.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 2; 259--268
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy state feedback with double integrator and anti-windup for the Van de Vusse reaction
Autorzy:
Márquez-Vera, C. A.
Màrquez-Vera, M. A.
Yakoub, Z.
Ma’arif, A.
Castro-Montoya, A. J.
Cázarez-Castro, N. R.
Powiązania:
https://bibliotekanauki.pl/articles/2134892.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy state feedback
LMIs
Van de Vusse reaction
double integrator
anti-windup
Opis:
Chemical processes use to be non-minimum phase systems. Thereby, they are a challenge for control applications. In this paper, fuzzy state feedback is applied in the Van de Vusse reaction that has an inverse response. The control design has an integrator to enhance the control performance by eliminating the steady-state error when a step reference is applied. An anti-windup action is used to reduce the undershoot in the system response. In practice, it is not possible to have always access to all the state variables. Thus, a fuzzy state observer is implemented via LMIs. Frequently, the papers that show similar applications present some comments about disturbance rejection. To eliminate the steady-state error when a ramp reference is used, in this work, a second integrator is aggregated. Now, the anti-windup also reduces the overshoot generated due to the usage of two integrators in the final application.
Źródło:
Archives of Control Sciences; 2022, 32, 2; 383--408
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge, attitudes and practices related to COVID-19 among health professionals in El Jadida Province, Morocco
Autorzy:
Ahizoune, S.
Belrhiti, Z.
Benkirane, R.
El Hiyani, M.
Alaoui, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/28765548.pdf
Data publikacji:
2022
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. During the COVID-19 pandemic, concerns were raised about the lack of knowledge and awareness of health workers (HW) in hampering the implementation of COVID-19 preventive strategies in hospitals. Objective. This cross-sectional study aims to explore the knowledge, attitudes, and practices (KAP) of the health workers related to COVID-19 in Moroccan hospitals and health facilities. Materials and methods. We administered an adapted questionnaire to 242 HW working in Azemmour and El Jadida hospital (two sites) and in 41 health centers in El Jadida province. We carried out a bivariate analysis and used contingency tables and logistic regression models to identify factors associated with different KAP levels. Results. We found that 90.1%, 8.3% and 60.3% of HW had respectively high levels of knowledge, risk perception attitudes and preventive practices towards COVID-19. High level of knowledge was associated with gender (OR: 0.267; 95% CI: 0.113-0.634; p=0.002), and professional profile (p<0.001). Levels of attitudes were associated with gender (OR: 17.143; 95% CI: 5.450-53.932; p<0.001) whereas levels of preventive practices were associated with position of the HW in COVID-19 (frontline or not frontline) (OR: 0.404; 95% CI: 0.236-0.691; p=0.001) and the overworked status of the HW (OR: 0.421; 95% CI: 0.242-0.730; p=0.002). Conclusion. Professionals' knowledge and practice levels were higher than their COVID-19 risk perception attitudes. Therefore, efforts should be made to improve the attitudes of health professionals.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2022, 73, 4; 475-483
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular screening of gastric Helicobacter pullorum recovered from different avian species in Egypt
Autorzy:
Elhelw, R.
Elhariri, M.
Salem, H.M.
Khalefa, H.S.
Hamza, D.A.
Ahmed, Z.S.
Powiązania:
https://bibliotekanauki.pl/articles/16539461.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Helicobacter pullorum
PCR
sequencing
chicken
resident wild birds
zoonoses
Egypt
Opis:
Helicobacter pullorum ( H. pullorum) is a bacterium that colonizes the intestines of poultry and causes gastroenteritis. Because these species are known as human and/or animal pathogens, identification of H. pullorum is becoming increasingly necessary. The bacterium has been linked to colitis and hepatitis in humans after being transmitted by infected meat consumption. Misdiagnosis of other enteric zoonotic pathogens such as Campylobacter and other Helicobacter species makes the diagnosis of H. pullorum extremely difficult. This study focused on the molecular detection of H. pullorum from the stomach (proventriculus and gizzard) of different avian species as new target organs for detection and transmission between avian species. Proventriculus and gizzards were obtained from 40 freshly dead chickens and resident wild birds (n=40). Diarrhea was found in the farms that were surveyed. DNA was extracted from all collected samples to conduct PCR amplification. The samples were screened for Helicobacter genus-specific 16s using C97 and C05 primers. To confirm the existence of H. pullorum, the positive samples were sequenced. H. pullorum was recorded in two out of 40 chicken samples. In addition, H. pullorum was recorded in one out of 40 resident wild birds. The 16S rRNA gene sequence for Helicobacter genus-specific in poultry and wild birds showed a 100% homology. In conclusion, broiler chickens and resident wild birds are possible reservoirs for H. pullorum, according to this report, and possibly act as a source of infection for humans via the food supply.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 3; 369-374
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1469

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