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Tytuł:
Comparasion of Crop Water Stress Index (CWSI) and Water Deficit Index (WDI) by using Remote Sensing (RS)
Autorzy:
Tanriverdi, C.
Atilgan, A.
Degirmenci, H.
Akyuz, A.
Powiązania:
https://bibliotekanauki.pl/articles/101434.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
water stress index
crop water stress index
water deficit index
remote sensing
Opis:
Drought, water scarcity and climate changes are very important threats for agriculture on a global basis. Remote Sensing (RS) is accepted as a technique to collect data and determine water stress indices. Water Stress Indices (WSI) are useful tools to prevent drought and determine irrigation scheduling. The water stress indices are primarily identified as the Crop Water Stress Index (CWSI) and the Water Deficit Index (WDI). The effect of soil background is major problem to establish CWSI especially during early growth stage measurements of canopy temperature (Ts). Hence, WDI is a better index when it comprised with CWSI because of Ts. CWSI and WDI can be determined by two different techniques. These are determined by using measured by using traditional components to collect data and estimated methods by applying RS components to collect necessary data. Estimated method has many advantages when this method compared with measured method. However, estimated method needs some RS components which are infrared gun (IR), sling psychrometer, Spectro radiometer. With the help of these tools, the necessary data are obtained and WDI is determined. By using Spectro radiometer vegetation indices are defined. Among the many vegetation indices, the Normalized Difference Vegetation Index (NDVI) is mostly used one. By using NDVI determination of vegetation cover is easy and accurate technique to establish WDI. Establishing these both stress indices with less fieldwork and by saving money, time and labor conveys the necessary information for agriculturists using remotely sensed data especially for large agricultural fields.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 879-894
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Derinkuyu dry bean irrigation planning in semi-arid climate by utilising crop water stress index values
Autorzy:
Uçak, Ali B.
Atılgan, Atılgan
Korytowski, Mariusz
Kocięcka, Joanna
Liberacki, Daniel
Stachowski, Piotr
Saltuk, Burak
Rolbiecki, Roman
Powiązania:
https://bibliotekanauki.pl/articles/28411640.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
dry bean
crop water stress index
CWSI
irrigation time
plant water stress index
Turkey
Opis:
This study was conducted to determine crop water stress index (CWSI) values and irrigation timing in the case of Derinkuyu dry bean (Phaseolus vulgaris L.). In 2017, dry beans were grown as the main crop according to the field design consisting of plots divided into randomised blocks. Irrigation treatment comprised full irrigation (I100) and irrigation issues with three different levels of water stress (I66, I33, I0). This study applied 602 mm of water under the I100 irrigation. The yield of Derinkuyu dry beans was equal to 3576.6 kg∙ha-1 in I100 irrigation. The lower limit (LL) value, which is not necessary for the determination of CWSI, was obtained as the canopy-air temperature difference (Tc - Ta) versus the air vapour pressure deficit (VPD). The upper limit (UL) value, at which the dry beans were wholly exposed to water stress, was obtained at a constant temperature. The threshold CWSI value at which the grain yield of dry beans started to decrease was determined as 0.33 from the measurements made with an infrared thermometer before irrigation in I66 irrigation treatment. As a result, it can be suggested that irrigation should be applied when the CWSI value is 0.33 in dry beans. Furthermore, the correlation analysis revealed a negative correlation between grain yield and crop water stress index and a positive correlation between yield and chlorophyll content. According to variance analysis, significant relationships were found between the analysed parameters at p ≤ 0.01 and p ≤ 0.05.
Źródło:
Journal of Water and Land Development; 2023, 59; 145--152
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defining Irrigation Scheduling Based on Crop Water Stress Index and Physiological Parameters for Hybrid Corn in Semi-Arid Climate
Autorzy:
Ucak, Ali Beyhan
Saltuk, Burak
Rolbiecki, Roman
Atilgan, Atilgan
Powiązania:
https://bibliotekanauki.pl/articles/2174923.pdf
Data publikacji:
2022
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
corn
crop water stress index
irrigation time
correlation
Opis:
The goal of this study is to determine the crop water stress index (CWSI) and irrigation scheduling based on CWSI values, as well as to examine the correlations between CWSI, physiological parameters and grain yield of hybrid corn P31A34 in semi-arid climate conditions. In 2014 and 2015, the upper limit (UL) temperatures at which plants were entirely exposed to water stress were 1.178°C and 2.38°C, respectively. When the corn grain yield began to decline, the CWSI threshold value was 0.34, indicating the yield limit. Grain yield, crop water consumption, crop water stress index, chlorophyll content, water use efficiency and leaf area index were found to have negative correlations (p ≤ 0.01) with CWSI values in both years of the study. The findings revealed that in semi-arid climate conditions, a maximum of 30% water deficit could be used during the growing period of the corn compared to full irrigation (I100) for water savings and that a water deficit greater than 30% results in considerable grain yield losses. In areas with limited water resources, the moderate water deficit (I70) may be a viable alternative to the I100.
Źródło:
Rocznik Ochrona Środowiska; 2022, 24; 231--245
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic parameters assessment of siliquae associated with stress indices in rapeseed cultivars
Ocena parametrów genetycznych łuszczyn roślin w odniesieniu do wskaźników stresu w odmianach rzepaku
Autorzy:
Rameeh, V.
Powiązania:
https://bibliotekanauki.pl/articles/11236547.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
genetic parameter
assessment
stress index
plant stress
rapeseed
plant cultivar
heritability
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2012, 67, 4; 35-44
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of stress susceptibility index of silage corn and sorghum crops
Autorzy:
Keten, Mualla
Değirmenci, Hasan
Powiązania:
https://bibliotekanauki.pl/articles/2131636.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
maize
sorghum
yield
stress susceptibility index
Opis:
Drought is an important factor that causes a decrease in yield and quality in regions where second crop silage plants are grown. One of the biggest problems in animal husbandry is feed. Especially silage feed production tends to decrease in areas with increasing water deficit and where water needs cannot be met. The high water requirement of the corn plant requires irrigation in arid and semi-arid regions. However, in order to continue the production of silage fodder in regions where water resources are insufficient with the increase of drought, it will be necessary to grow forage plants that can be an alternative to corn plant. In previous studies, it has been discussed whether the sorghum plant is an alternative to the corn plant. The aim of this study is to determine the drought sensitivity index based on the yield values of both plants in wet and dry conditions. Thus, it will be determined whether the sorghum plant will be an alternative to the corn plant in terms of drought. The identification and selection of drought-resistant cultivars and species is possible using various indices. In this study, second crop silage maize and sorghum crops were grown in Kahramanmaraş conditions for two years (2018 and 2019), dry and irrigated. Stress sensitivity index (SSI) was used to determine the drought tolerance of silage maize and sorghum crops. 'Colonia' variety was used for silage corn and 'Es Foehn' variety was used for sorghum. When the STI values are examined, the corn and sorghum values for 2018 were 0.55 and 0.53, respectively, while the d values for 2019 were found as 0.33 in corn and 0.54 in sorghum. these values are very close to the YSI values. While the 2018 values in both indices were not determinative in terms of drought resistance, the value of sorghum in 2019 was 64% higher than corn (this value was found to be 61% for YSI). This also showed that there is a direct correlation between YSI and STI indices.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2022, nr I/1; 21-28
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CropSyst model for wheat irrigation water management with fresh and poor quality water
Model CropSyst do zarządzania nawadnianiem pszenicy wodą słabej jakości
Autorzy:
Ouda, S. A.
Noreldin, T.
Mounzer, O. H.
Abdelhamid, M. T.
Powiązania:
https://bibliotekanauki.pl/articles/292497.pdf
Data publikacji:
2015
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
agricultural drainage water
deficit irrigation
fresh water
water stress index
deficyt nawodnień
indeks stresu wodnego
wody drenarskie
wody naturalne
Opis:
CropSyst model can be used as irrigation water management tool to increase wheat productivity with poor quality water. The objective of this study was to calibrate CropSyst model for wheat irrigated with fresh and agricultural drainage water. To do so, three field experiments were conducted during three successive seasons in Nubaria Agricultural Research Station, Egypt representing the newly reclaimed calcareous soils. In the first season the treatments were 100% crop evapotranspiration (ETc) of fresh water (FW) and 100% ETc of agricultural drainage water (DW), while in the second and the third seasons, the treatments were 100% ETc of FW, 100% ETc of DW, 120% ETc of DW and 130% ETc of DW. From these results one can concluded that deducting 5% of the applied water to all treatments reduced yield by 3, 5 and 7% in the first, second and third growing season, respectively as a result of heat stress existed in the 2nd and 3rd seasons during reproductive phase. Furthermore, deducting 5% of the applied water from all treatments in the vegetative phase only resulted in lower yield losses. Thus, using CropSyst model could guide us to when we could reduce the applied irrigation water to wheat to avoid high yield losses.
Model CropSyst może znaleźć zastosowanie jako narzędzie w zarządzaniu systemem nawodnień wodą niskiej jakości w celu zwiększenia produkcji pszenicy. Przedmiotem przedstawionych badań było skalibrowanie modelu CropSyst do nawodnień pszenicy wodą naturalną i wodą z rolniczych systemów drenarskich. W tym celu przeprowadzono trzy eksperymenty polowe w trzech kolejnych sezonach realizowane w Nubaria Agricultural Research Station w Egipcie na ostatnio zmeliorowanych glebach wapiennych. W pierwszym sezonie warianty eksperymentalne obejmowały: 100% ewapotranspiracji (ETc) wody naturalnej (FW) i 100% ETc wody z systemów drenarskich (DW); w drugim i trzecim sezonie wariantami eksperymentalnymi były: 100% ETc z użyciem FW, 100% ETc z użyciem DW oraz 120% i 130% ETc z zastosowaniem DW. Uzyskane wyniki dają podstawy do wnioskowania, że zmniejszenie ilości wody zastosowanej do nawodnień o 5% we wszystkich wariantach zmniejszyło plony o 3, 5 i 7% odpowiednio w pierwszym, drugim i trzecim sezonie wskutek stresu termicznego, jaki wystąpił w drugim i trzecim sezonie w fazie reprodukcji. Ponadto, zmniejszenie ilości stosowanej wody o 5% jedynie w trakcie fazy wegetatywnej skutkowało mniejszymi stratami plonu. Podsumowując, zastosowanie modelu CropSyst umożliwia nam stwierdzenie, kiedy można ograniczyć ilość wody do nawodnień i uniknąć znaczących strat w plonie pszenicy.
Źródło:
Journal of Water and Land Development; 2015, 27; 41-50
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reactive oxygen metabolitesin alpha-herpesvirus-seropositive Mediterranean buffaloes (Bubalus bubalis): a preliminary study
Autorzy:
Tafuri, S.
Marullo, A.
Ciani, F.
Della Morte, R.
Montagnaro, S.
Fiorito, F.
De Martino, L.
Powiązania:
https://bibliotekanauki.pl/articles/2087691.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Bubalus bubalis
Bubaline herpesvirus 1 (BuHV-1)
Bovine herpesvirus 1 (BoHV-1)
reactive oxygen metabolites (ROM)
oxidative stress index (Osi)
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 3; 639-642
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-contact video-based remote photoplethysmography for human stress detection
Autorzy:
Nikolaiev, Sergii
Telenyk, Sergii
Tymoshenko, Yury
Powiązania:
https://bibliotekanauki.pl/articles/385232.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
video processing
web cameras
stress index
remote photoplethysmography
rPPG
heart rate
heart rate variability
Predictive
Preventive
Personalized Medicine
Participatory Medicine
Opis:
This paper presents the experimental results for stress index calculation using developed by the authors information technology for non-contact remote human heart rate variability (HRV) retrieval in various conditions from video stream using common wide spread web cameras with minimal frame resolution of 640x480 pixels at average frame rate of 25 frames per second. The developed system architecture based on remote photoplethysmography (rPPG) technology is overviewed including description of all its main components and processes involved in converting video stream of frames into valuable rPPG signal. Also, algorithm of RR-peaks detection and RR-intervals retrieval is described. It is capable to detect 99.3% of heart contractions from raw rPPG signal. The usecases of measuring stress index in a wide variety of situations starting with car and tractor drivers at work research and finishing with students passing exams are presented and analyzed in detail. The results of the experiments have shown that the rPPG system is capable of retrieving stress level that is in accordance with the feelings of experiments’ participants.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 2; 63-73
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Indeks stresu na rynku zbywalnych instrumentów finansowych w Polsce
Stress Index in the Negotiable Financial Instruments Market in Poland
Autorzy:
Kravchuk, Igor
Powiązania:
https://bibliotekanauki.pl/articles/525928.pdf
Data publikacji:
2017-05-30
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
indeks stresu
rynek zbywalnych instrumentów finansowych
stabilność finansowa
płynność rynkowa
zmienność rynku
stress index
negotiable financial instruments market
financial stability
market liquidity
market volatility
Opis:
Celem badania jest weryfikacja zakłóceń na rynku zbywalnych instrumentów finansowych w Polsce na podstawie szacunków kompozytowego indeksu stresu, który obejmuje wskaźniki dotyczące rynku akcji (zmienność, płynność, CMAX na podstawie indeksu giełdowego WIG), rynku obligacji (zmienność rentowności 10-letnich obligacji skarbowych, ich płynność, spread suwerenny oraz krzywej rentowności) i rynku derywatów (zmiana liczby otwartych pozycji oraz wolumenu na rynku kontraktów terminowych i opcji). Przeprowadzona analiza wartości indeksu w latach 2007–2015 potwierdza skuteczność indeksu stresu (FIMSI) w rozpoznaniu zakłóceń na rynku (kiedy wartość indeksu przekracza trend długoterminowy więcej niż o jedno odchylenie standardowe).
The aim of the study is to verify the turbulence in the negotiable financial instruments market in Poland, by evaluating the composite stress index, which includes indicators concerning the stock market (volatility, liquidity, CMAX based on stock index WIG), the bond market (volatility of 10-year Treasury bonds, their liquidity, the sovereign spread and the yield curve spread) and the derivatives market (the change in the number of open positions and volume in the futures and options market). The analysis of index values for the years 2007–2015 confirms the robustness of the stress index (FIMSI) in the diagnosis of stresses in the market (when the index value exceeds the long-term trend by more than 1 standard deviation).
Źródło:
Problemy Zarządzania; 2017, 1/2017 (66), t.2; 193 - 206
1644-9584
Pojawia się w:
Problemy Zarządzania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk assessment during the transportation of dangerous goods considering the functional state of the driver
Autorzy:
Fornalchyk, Yevhen
Afonin, Maksym
Postranskyy, Taras
Boikiv, Mykola
Powiązania:
https://bibliotekanauki.pl/articles/2203853.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
functional state of the driver
traffic conditions
road conditions
stress index
traffic route
risk
dangerous goods
stan funkcjonalny kierowcy
warunki ruchu drogowego
warunki drogowe
wskaźnik stresu
szlak komunikacyjny
ryzyko
towary niebezpieczne
Opis:
Increase in motorization and densification of populations in cities have led to the use of more resources both for the construction of different objects and for the service and operation of automotive vehicles. As a result, volumes of freight transportation, which are related to the construction and servicing of these objects, increase. New scientifically applied tasks that are related to the safety of freight transportation have emerged. Special attention is being paid to those that are related to dangerous tasks. It is obvious that traffic safety and the quality of the transportation process significantly depend on the behaviors and actions of the driver. The driver, as it is known, is the main chain of the “driver - automobile - road - environment” (DARE) system. With improvements in the technical and operational parameters of vehicles and road characteristics, the study of the functional state (FS) of the driver and the reliability of his skills become more important every time. The specific importance of this becomes clear when drivers operate vehicles that transport dangerous goods. Therefore, research on the interaction of chains of the DARE system (using improved existing and developed methods by the authors) is carried out in this paper, taking into account the indicators of drivers’ FS in different situations (stress index, which consists in evaluation of the heart and brain operations). The results obtained provide an opportunity to predict their behavior in different road situations and, as a consequence, to determine possible risks during the transportation of dangerous goods. The authors improved the methodology of determining the levels of possible risks of accidents and assessment of their consequences, taking into account the peculiarities of transportation routes, traffic conditions, and psychophysiological indicators of the driver`s body during the transportation of dangerous goods within settlements and on the roads between them.
Źródło:
Transport Problems; 2021, 16, 1; 139--152
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coal permeability change caused by mining-induced stress
Autorzy:
Zhang, Lulu
Li, Bo
Wei, Jianping
Wen, Zhihui
Ren, Yongjie
Powiązania:
https://bibliotekanauki.pl/articles/89077.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining-induced stress
permeability
unloading path
sensitivity index
effective stress
Opis:
To study coal permeability evolution under the influence of mining actions, we conducted a sensitivity index test on permeability to determine the influence of axial and confining stresses on coal permeability. Loading and unloading tests were performed afterward, and the differences between loading and unloading paths in terms of strain and permeability were studied. A permeability evolution model was built in consideration of absorption swelling and effective stress during modeling. An effective stress calculation model was also built using axial and confining stresses. The calculation results of the two models were compared with experimental data. Results showed that permeability were more sensitive to confining stress than axial stress, and effective stress placed a large weight on confining stress. Large axial and radial deformations at peak strength were observed during unloading. In the unloading phase, the permeability of coal began to increase, and the increment was enhanced by large initial axial stress when confining stress was loaded. permeability sensitivity to axial and confining stresses were used to explain these permeability changes. The calculation results of the models fitted the experimental data well. Therefore, the proposed models can be used to calculate effective stress on the basis of axial and confining stresses and describe permeability change in coal under the influence of mining actions.
Źródło:
Mining Science; 2019, 26; 203-222
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Regional Bioclimatic Contrasts in Poland
Autorzy:
Blażejczyk, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2035473.pdf
Data publikacji:
2011-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
bioclimate differences
acclimatisation
bioclimatic index
bioclimatic stress
Opis:
Traveling is one of most popular tourism activity. Usually it is associated with the change of climate conditions. In a short time we can move to different environment and our organisms are under great pressure of atmospheric stimuli which have diverse level and range of variability in comparison to home location. The general climate information seem to be insufficient to be prepared to new conditions. The paper presents new complex index which can be used to assess contrasts of bioclimatic conditions (BCI). It was applied to compare differences in bioclimatic conditions in six stations represented various bioclimate regions of Poland: Koszalin (Coastal region), Białystok (North-East region), Warszawa and Wrocław (Central region), Rzeszów (South-East region) and Hala Gąsienicowa (Tatras, Carpathians region).
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2011, 15; 79-91
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat Stress Analysis Using the Discomfort Index Method: Impact on Macro Environmental in Yogyakarta
Autorzy:
Nurmaya, E. M.
Abidin, A. U.
Hasanah, N. A. I.
Asmara, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/2025782.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
discomfort index
environmental assessment
heat stress
impact heat stress
thermal comfort
Yogyakarta
Opis:
A growing urban development pattern can have both positive and negative impacts. One of them is the thermal discomfort in the form of heat stress. Heat stress is the maximum condition of the human body to receive the heat exposure to various activities. This study analyzed the thermal comfort in Yogyakarta City based on the Discomfort Index (DI) method. The DI method is commonly used in tropical climates using the parameters that include average air temperature and humidity. The data consists of secondary data obtained from Geophysics Station Gamping in 2004-2020 and Climatology Station Mlati in 2017-2020. The result of DI indicated that the highest value occurred in the wet moon climate type in April, with 25.63 °C. Therefore, the conditions showed that more than 50% of people in the city of Yogyakarta fall into an uncomfortable category with an average index of 24.97 °C, which can lead to heat stress. Environmental engineering can be employed to decrease the heat stress potential and improve the thermal comfort for Yogyakarta’s urban community, which is public and private open space, plant road shade vegetation, implement a green façade (vertical garden), as well as improve people’s living behavior and use appropriate clothing.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 286-295
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The psychological trait among fitness center goers during home quarantine and its relationship to the body mass index
Autorzy:
Zureigat, Ayed
Fattah, Osama Abdel
El Kailani, Ghazi
Powiązania:
https://bibliotekanauki.pl/articles/1933074.pdf
Data publikacji:
2021-07-07
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
Psychological stress
Motivation
Body mass index
Home quarantine
Coronavirus
Opis:
Background: The Corona pandemic imposed on the countries of the world to take many strict measures to limit the spread of this virus, as home quarantine. Objective: this study aimed to identify the psychological aspects level among the fitness center goers during home quarantine and the differences in these aspects level according to the gender variable. As well as, the relationship between the psychological stress and motivation level, in addition, to the relationship between some psychological aspects and the body mass index, finally the differences in the body mass index before and after home quarantine. Design: To achieve this, the researchers used the descriptive approach on a sample consisting of (510), selected using randomly sample technique with the average age of (24±2.6) years. Because of the home quarantine and to reduce face-to-face interaction, the researchers used a questionnaire by using the Google form. The study tool consisted of (11) paragraphs associated with stress and (11) paragraphs associated with motivation. The researchers used means, standard deviations, paired and independent sample T-test by using SPSS version 24 with a confidence level of 95% (p value < 0.05). Results: The results of the study have shown that the psychological stress level among the study sample came with a high average (4.03) and moderate average (2.83) for motivation domain without any statistically significant differences according to the gender variable. As well as, a statistically significant association between the level of psychological stress and motivational in males and females with a higher percentage of body mass index (BMI) for males and females after home quarantine and a higher percentage of females. While the results of the study showed a statistically significant correlation between psychological aspects and body mass index. Conclusion: In light of these results, the urgent need to activate the role and importance of psychological self-care for individuals during home quarantine and work to find a balance between leisure time and other life activities.
Źródło:
Physical Activity Review; 2021, 2, 9; 1-10
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of stress annealing on the electrical and the optical properties of MOS devices
Autorzy:
Rzodkiewicz, W.
Kudła, A.
Rawicki, Z.
Przewłocki, H. M.
Powiązania:
https://bibliotekanauki.pl/articles/308838.pdf
Data publikacji:
2005
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
stress
MOS
Si-SiO2 system
electrical parameters
refractive index
Opis:
In this paper we show the results of a study of the effects of high-temperature stress annealing in nitrogen on the refraction index of SiO2 layers and electrical properties in metal-oxide-semiconductor (MOS) devices. We have experimentally characterized the dependence of the reduced effective contact potential difference (ECPD), the effective oxide charge density (Neff), and the mid-gap interface trap density (Dit) on the annealing conditions. Subsequently, we have correlated such properties with the dependence of the refraction index and oxide stress on the annealing conditions and silicon dioxide thickness. Also, the dependence of mechanical stress in the Si-SiO2 system on the oxidation and annealing conditions has been experimentally determined. We consider the contributions of the thermal-relaxation and nitrogen incorporation processes in determining changes in the SiO2 layer refractive index and the electrical properties with annealing time. This description is consistent with other annealing studies carried out in argon, where only the thermal relaxation process is present.
Źródło:
Journal of Telecommunications and Information Technology; 2005, 1; 115-119
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Winter UTCI variability in Poland in the 21st century
Autorzy:
Wereski, Sylwester
Krzyżewska, Agnieszka
Dobek, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/946933.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
UTCI
Universal Thermal Climate Index
biothermal conditions
cold stress
winter season
Polska
Opis:
The study analyses spatial and temporal variability of the UTCI index during winter seasons in Poland in the 21st century. The most frequent UTCI thermal stress category was moderate cold stress with a frequency varying from 45.8% in Łeba (Coastal region) to 66.1% in Zielona Góra (Central region). In mountain areas, this class was less frequent (7.3-12.3%). The second most frequent class was strong cold stress with values from 11.1% in Zakopane (Carpathian region) to 43.4% in Suwałki (North-East region). In mountain areas, very strong cold stress and extreme cold stress occurred frequently (25.0-35.5% and 17.7-52.0%, respectively). Few cases of extreme cold stress were observed on other Polish stations. Thermoneutral zone was not recorded in the mountain area, although on other Polish stations its frequency ranged from 0.1% in Chojnice, Suwałki and Białystok located in northern part of Poland to 4.3% in Zakopane (Carpathian region).
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2020, 24, 3; 128-137
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential influence of urban sprawl and changing land surface temperature on outdoor thermal comfort in Lagos State, Nigeria
Autorzy:
Obiefuna, Jerry N.
Okolie, Chukwuma J.
Nwilo, Peter C.
Daramola, Olagoke E.
Isiofia, Lawrence C.
Powiązania:
https://bibliotekanauki.pl/articles/1050781.pdf
Data publikacji:
2021-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Landsat imageries
land cover changes
heat stress
outdoor thermal comfort
universal thermal climate index
Opis:
The continuous monitoring of the relationship between land surface temperature (LST) and land cover change is imperative for an inquiry into the potential impact of LST on human well-being, including urban outdoor thermal comfort in Lagos State, Nigeria. Using Landsat imagery, this study assessed land cover and LST changes from 1984 to 2019. Land cover was extracted, LST was determined from Landsat imageries and the land cover changes were linked to LST using the contribution index (CI). Afterwards, the universal thermal climate index (UTCI) was calculated to determine the heat stress levels. Findings confirm the presence of urban sprawl and new growth areas in previously rural Local Government Areas (LGAs) eastward, northward and westward of Lagos metropolis and in regions which lie on the fringe of the state’s border with Ogun State. Also, a very strong link between high LST intensities and increasing concentration of urban areas in rapidly growing LGAs has been observed. This link further confirms the increased warming of the state, with an increase in mean LST of 2.16°C during 1984–2019. The UTCI which was used to gauge the influence of LST on outdoor thermal comfort ranged from moderate to strong heat stress levels. This study helps to strengthen the case for definite policies and actions which should be aimed at achieving moderate urban development through increased urban tree canopy/green infrastructure provision and carbon sequestration activities in urban design/landscape design, in Lagos State.
Źródło:
Quaestiones Geographicae; 2021, 40, 1; 5-23
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of paclobutrazol on the growth and photosynthesis of Sequoia sempervirens seedlings
Autorzy:
Ju, S.
Xu, D.
Zhan, C.
Ji, L.
Yin, T.
Li, Z.
Lu, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1969.pdf
Data publikacji:
2019
Wydawca:
Instytut Ogrodnictwa
Tematy:
paclobutrazol
plant growth regulator
photosynthetic activity
Sequoia sempervirens
seedling
morphological index
chlorophyll fluorescence
environmental stress
Źródło:
Journal of Horticultural Research; 2019, 27, 1
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health monitoring of composite car roof failure under effect of different impact velocity
Autorzy:
Madeh, Ahmed Raee
Abd-Ali, Nabel Kadum
Powiązania:
https://bibliotekanauki.pl/articles/27313827.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
failure index
Tsai-Wu
health monitoring
car roof
stress analysis
wskaźnik uszkodzeń
dach samochodu
analiza naprężeń
uderzenie
Opis:
During this work, the roof of the car was used as an engineering application to study and monitor the occurrence of failures under the influence of various loads. The shells are made of multilayer composite materials using epoxy resin reinforced with carbon fiber and aluminium oxide granules as reinforcing materials to increase the impact resistance that vehicles may be exposed to while driving, in addition to other loads and conditions such as vibration and constant exposure to moisture and sunlight. The simulation program was used the finite elements method through software Abaqus program in addition to the program MATLAB v.2020a to process the data obtained from the method that used in this study. The results showed that the specified failure criteria work well for predicting the overall structural response such as strain, stress, maximum force and displacement. The losses of energy of impact collision increase as an increase in impact velocity. The dissipation of energy which depend on the stress and strain distribution during elastic deformations. The effect of thickness of the lamina plays an important role in health monitoring the structure.
Źródło:
Diagnostyka; 2023, 24, 4; art. no. 2023406
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exogenous regulation of the potatoes’ adaptive potential when using bio stimulants
Autorzy:
Shitikova, Aleksandra V.
Abiala, Adewale A.
Tevchenkov, Alexander A.
Bazhenova, Svetlana S.
Lazarev, Nikolay N.
Kurenkova, Evgeniya M.
Powiązania:
https://bibliotekanauki.pl/articles/2174370.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
abiotic stress
antioxidant
biopolymer chitosan
growth regulators
potato
N-tester
near infrared
normalized difference vegetation index
NDVI
Opis:
Potato from the Solanaceae family is one of the most important crops in the world and its cultivation is common in many places. The average yield of this crop is 20 Mg·ha-1 and it is compatible with climatic conditions in many parts of the world. The experiment studied the possibility of exogenous regulation of the adaptive potential available for four potato cultivars through the use of growth stimulants with different action mechanisms: 24-epibrassinolide (EBL) and chitosan biopolymer (CHT). The results allowed us to establish significant differences in growth parameters, plant height, leaf index, vegetation index, chlorophyll content, and yield structure. Monitoring growth and predicting yields well before harvest are essential to effectively managing potato productivity. Studies have confirmed the empirical relationship between the normalised difference vegetation index (NDVI) and N-tester vegetation index data at various stages of potato growth with yield data. Statistical linear regression models were used to develop an empirical relationship between the NDVI and N-tester data and yield at different stages of crop growth. The equations have a maximum determination coefficient (R2) of 0.63 for the N-tester and 0.74 for the NDVI during the flowering phase (BBCH1 65). NDVI and N-tester vegetation index positively correlated with yield data at all growth stages.
Źródło:
Journal of Water and Land Development; 2022, 54; 234--238
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bodźcowość warunków biometeorologicznych we Wrocławiu
Stimulating qualities of biometeorological conditions in Wrocław
Autorzy:
Bryś, Krystyna
Ojrzyńska, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/578455.pdf
Data publikacji:
2016
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
wskaźnik obciążeń cieplnych człowieka UTCI
stres ciepła
stres chłodu
Wrocław
składowe całkowitego bilansu promieniowania słonecznego
Universal Thermal Climate Index UTCI
heat stress
cold stress
component of solar radiation balance
Opis:
Bodźcowość warunków biometeorologicznych we Wrocławiu przeanalizowana została na podstawie wartości wskaźnika oceny obciążeń cieplnych człowieka UTCI (Universal Thermal Climate Index) w latach 2008–2014. Wyliczono je z danych o kroku godzinowym otrzymanych z Obserwatorium Agro- i Hydrometeorologii Uniwersytetu Przyrodniczego we Wrocławiu, z uwzględnieniem składowych całkowitego bilansu promieniowania słonecznego. Analizie poddane zostały roczne i wieloletnie przebiegi wartości wskaźnika UTCI oraz częstość występowania klas wartości wskaźnika odpowiadających określonej bodźcowości (stres ciepła i zimna). Dla wybranych okresów fal ciepła i chłodu porównano przebiegi głównych meteorologicznych determinant wskaźnika UTCI. Potwierdzono słabą bodźcowość warunków biometeorologicznych Wrocławia. Wykazano, że warunki biometeorologiczne wrocławskich przedmieść charakteryzują się znaczną frekwencją braku obciążeń cieplnych. Zaznaczono, że w ostatnich latach wzrasta liczba sytuacji ze stresem zimna, co w obszarach o stosunkowo niskiej szorstkości podłoża spowodowane jest dynamiką ruchu powietrza w częściej występujących sytuacjach cyklonalnych.
Stimulating qualities of biometeorological conditions of Wrocław were analyzed on the basis of the values of the Universal Thermal Climate Index (UTCI) of the years 2008–2014. UTCI values were calculated from 1-hour data with the use of components of solar radiation balance, measured in the Agro- and Hydrometeorological Observatory of Wrocław University of Environmental and Life Science. Annual and long-standing courses of UTCI and the occurrence frequency of UTCI levels corresponding to a specific stimulating condition (heat and cold stress) were analyzed. For the selected coldwave and heat-wave, the courses of the main meteorological determinants of UTCI were compared. It was demonstrated that the biometeorological conditions of Wrocław suburbia are characterized by a considerable frequency of heat load deficit. It was remarked that the number of incidents of cold stress has increased in recent years. In in the areas of relatively smal l surface roughness, the reason can be attributed to the dynamics of the wind in more frequently occurring cyclonic circulation.
Źródło:
Acta Geographica Lodziensia; 2016, 104; 193-200
0065-1249
Pojawia się w:
Acta Geographica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Integrated Yoga Program on Energy Outcomes as a Measure of Preventive Health Care in Healthy People
Autorzy:
Kushwah, Kuldeep Kumar
Nagendra, Hongasandra Ramarao
Srinivasan, Thaiyar Madabusi
Powiązania:
https://bibliotekanauki.pl/articles/1054658.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Electro Photonic Imaging Technique EPI
Gas Discharge Visualization GDV
General Health Index and Disorderliness
Integrated Yoga Program IYP
Stress
Opis:
The aim of this study was to measure the changes in stress, general health index and disorderliness in human energy pattern through Integrated Yoga Practices (IYP). Ninety four healthy volunteers (male 55 and female 39), age (mean ± sd 26.70 ±8.58) were assessed before and after four weeks of IYP. The experiment was conducted four times and the assessment was done by utilizing the Electro Photonic Imaging (EPI) technique. Comparisons were made to ascertain whether energy homeostasis diverges based on genders. The parameters considered for analysis were Activation Coefficient (AC ), Integral Area (IA) and Integral Entropy (IE). Reduction in stress levels (AC ), increase in general health index (IA) and decrease in disorderliness (IE) on the left side parameters were found reproducible in all four experiments. The results also revealed a highly significant reduction in stress levels and highly significant improvement in the health indices at the psycho-physiological level. The subgroup analysis of both male and female demonstrated a significant reduction in stress levels and significant improvement in health index (psycho-physiological). Baseline comparisons between males and females showed significant difference in general health index at both psychophysiological and physiological levels. In conclusion, IYP regulates, improves and prolongs energy homeostasis of an organism. Therefore, it helps in prevention of ill health and also preserves health. The EPI outcomes are reproducible. Further, the present study also found that the energy pattern differs with gender. Hence, it is suggested that studies with male and female participants may be conducted separately.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2015, 12, 4; 61-71
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of wheat grain in relation to internal cracks
Autorzy:
Wozniak, W.
Powiązania:
https://bibliotekanauki.pl/articles/26299.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
strain
spring wheat
wheat
endosperm structure
wheat grain
moisture treatment
moisture content
internal crack
elasticity
stress
mechanical property
damage index
Źródło:
International Agrophysics; 2001, 15, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overweight in relation to motor activity and stress level of university students
Nadwaga w stosunku do aktywności fizycznej i poziomu stresu studentów wyższych uczelni
Autorzy:
Zuskova, K.
Bukova, A.
Bakalar, P.
Brtkova, M.
Vojtasko, L.
Hancova, M.
Powiązania:
https://bibliotekanauki.pl/articles/5128.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
body mass index
obesity
overweight
weight reduction
health
life quality
life style
motor activity
physical activity
stress level
university student
Opis:
A current problem of the population nowadays appears to be the lack of motor activity, the increase in BMI and the growth in stressogenic factors in the way of life of the population. This in turn affects the quality of human life and health. On a sample of university undergraduates (794 men and 1,169 women) we were observing the relation between overweight, namely the level of BMI gained via somatometric measurement, and the amount of subjectively evaluated level of motor activity, in their relation to the subjectively perceived extent of stress in their lifestyle, using the method of questionnaire. The results in both genders confirmed the existing relationship between BMI values and the degree of physical activity as well as the correlation between motor activity and subjectively perceived stress. As a result, the relationship between the variables motor activity and stress level did not prove significant.
Współcześnie obserwuje się narastanie problemu deficytu aktywności fizycznej, wzrost wskaźnika BMI oraz coraz większy udział czynników stresu w sposobie życia społeczeństwa. Tendencje te z kolei wpływają negatywnie na jakość życia i zdrowie człowieka. Badaniom somatometrycznym poddano grupę studentów wyższych uczelni (794 mężczyzn i 1169 kobiet), aby określić związek pomiędzy nadwagą – konkretnie wysokim poziomem BMI – a stopniem aktywności fizycznej i subiektywnie postrzeganym poziomem stresu. Opinie na ten temat zebrano w badanej grupie za pomocą kwestionariusza. Wyniki – uporządkowane wg kryterium płci – potwierdziły związek między BMI i stopniem aktywności fizycznej oraz subiektywnym postrzeganiem stresu, nie stwierdzono natomiast związku między aktywnością fizyczną a poziomem stresu.
Źródło:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna; 2013, 12, 2
1895-8680
Pojawia się w:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry matter and protein yields and leaf greenness index (SPAD) of alfalfa and festulolium depending on cultivation method and soil moisture level
Plon suchej masy i białka oraz indeks zieloności liścia (SPAD) lucerny i festulolium w zależności od sposobu uprawy i poziomu wilgotności gleby
Autorzy:
Staniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/334864.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
legumes
grass
drought stress
yield
SPAD index
mixture
pure stand
bobowate
trawy
stres suszy
plon
SPAD indeks
mieszanka
siew czysty
Opis:
The aim of the study was to assess the influence of water deficiency in the soil and cultivation method on dry matter and protein yields as well relative chlorophyll content of alfalfa and festulolium leaves. The pot experiment was conducted in the years 2012-2014 in the greenhouse of IUNG-PIB in Puławy, in a completely randomized system, in 4 repetitions. The research included alfalfa and festulolium cultivated in pure stand and in a mixture, at two soil moisture levels: 70% field water capacity (optimal humidity) and 40% FWC (drought stress). The study showed that long-term drought stress significantly reduced the dry matter yield of alfalfa and festulolium, with the highest loss in pure alfalfa stand (by 39.8% on average), lower in the mixture (by 29.1%), and lowest in pure festulolium stand (by 13.6%). Regardless of the soil moisture conditions, the highest total protein yield was obtained from alfalfa grown in pure stand, and lower by only 12% from the mixture. The protein yield from festulolium cultivated in pure stand was, on average, lower by 68% in comparison with the yield of alfalfa. The greenness index of the alfalfa leaf was significantly higher than that of the hybrid festulolium, regardless of the soil moisture conditions. The water requirement in the soil and the method of cultivation did not significantly differentiate the relative content of chlorophyll in the leaves of the tested plant species.
Celem badań była ocena wpływu niedoboru wody w glebie oraz sposobu uprawy na plon suchej masy i białka oraz względną zawartość chlorofilu w liściach lucerny i festulolium. Doświadczenie wazonowe przeprowadzono w latach 2012-2014 w hali wegetacyjnej IUNG-PIB w Puławach, w układzie kompletnie zrandomizowanym, w 4 powtórzeniach. W badaniach uwzględniono lucernę siewną i festulolium uprawiane w siewach czystych i w mieszance, przy 2 poziomach wilgotności gleby: 70% polowej pojemności wodnej (wilgotność optymalna) i 40% ppw (stres suszy). W badaniach wykazano, że długotrwały stres suszy istotnie redukował plon suchej masy lucerny i festulolium, przy czym największą stratę wykazano w czystym zasiewie lucerny (średnio o 39.8%), mniejszą u mieszanki (o 29.1%), a w najmniejszą u mieszańca festulolium (o 13.6%). Niezależnie od warunków wilgotnościowych gleby, największy łączny plon białka ogólnego uzyskano z uprawy lucerny w siewie czystym, a tylko o 12% mniejszy z uprawy mieszanki. Plon białka z uprawy festulolium w siewie czystym był średnio o 68% mniejszy w porównaniu do plonu lucerny. Indeks zieloności liścia (SPAD) lucerny był istotnie większy w porównaniu do mieszańca festulolium, niezależnie od warunków wilgotnościowych gleby. Niedobór wody w glebie i sposób uprawy nie różnicowały istotnie względnej zawartości chlorofilu w liściach badanych gatunków roślin.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2018, 63, 3; 92-97
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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