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Wyświetlanie 1-15 z 2306
Tytuł:
Concomitant virus-induced gastrointestinal infection in dogs
Autorzy:
Saltık, H.S.
Powiązania:
https://bibliotekanauki.pl/articles/16647564.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
canine
concomitant
distemper
gastrointestinal
parvovirus
PCR
Opis:
Many viruses are involved in concomitant infections, which are prevalent in nature. In mixed infections, one or both infectious agents may be increased, reduced, or both may be increased while the other is suppressed. Canine distemper virus (CDV) and Canine parvovirus- 2 (CPV-2) are important causes of gastroenteritis in dogs. Detection of these viruses is challenging since the symptoms are very similar. CDV is a member of the morbillivirus genus in the Paramyxoviridae family, and CPV-2 is a member of the Protoparvovirus genus in the Parvoviridae family; and both predominantly affect puppies and induce gastrointestinal symptoms in dogs. The purpose of this study was to contribute to the differential diagnosis of dogs with gastrointestinal symptoms. A PCR technique with specific primers was used to identify CDV and CPV-2 infections in gastroenteric dogs, and clinical changes in the infected dogs were monitored. The VP2 structural gene of CPV and the nucleocapsid gene of CDV were partially amplified in the study. PCR amplified the partial fragments of the CDV nucleocapsid (287 bp) and CPV-2 VP2 proteins (583 bp) from feces. In total, 3 out of 36 stool samples were positive for CDV and CPV-2 in the same dogs. Gasterointestinal symptoms also supported the diagnosis of concomitant infection with CDV and CPV-2 in these dogs. Dehydration and diarrhea in dogs can be signs of various diseases, such as viral, bacterial, and parasitic infections. After the elimination of non-viral pathogens, CDV and CPV-2 should also be simultaneously investigated to establish what is causing these symptoms. This study demonstrates the potential utility of correct diagnosis for the control of viral infection in dogs, but more research with a broader use of PCR-based detections is needed to assess its impact on differential diagnosis for concomitant infections.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 203-209
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical and Optical Studies in Ge$\text{}_{100-x}$S$\text{}_{x}$ Chalcogenide Thin Films
Autorzy:
Metwally, H. S.
Powiązania:
https://bibliotekanauki.pl/articles/2027396.pdf
Data publikacji:
2001-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.Jc
78.66.Jg
Opis:
Thin films of Ge$\text{}_{100-x}$S$\text{}_{x}$ with different values of x are deposited on quartz substrates by a conventional thermal evaporation technique. The electrical conductivity of these films was measured. The experiments reveal that the electronic conduction is strongly composition dependent and is thermally activated with a single activation energy for x>40. A variable range hopping conduction mechanism seems to dominate when x=16 and 27. The optical absorption of the films is investigated using spectrophotometric measurements of the transmittance and reflectance in the wavelength range 200-3000 nm. All the studied compositions obey the Tauc relation concerning the non-direct transitions. The optical energy gap E$\text{}_{g}$ value increases with the increase in chalcogen content x. The Urbach parameter E$\text{}_{0}$ decreases from 310 meV to 149 meV as x increases from 16 to 70.
Źródło:
Acta Physica Polonica A; 2001, 99, 6; 683-690
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a new software of electromagnetic lenses (CADTEL)
Autorzy:
Hasan, H.S.
Powiązania:
https://bibliotekanauki.pl/articles/411585.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Electron lenses
Objective and projector properties
Lenses aberrations
Electron optics
Charged particle optics
Software and simulation in electron lenses
Opis:
The Computer Aided designing Tools for Electromagnetic Lenses (CADTEL) is a new software as application package of programs concept to aid both users and professionals in symmetric and asymmetric electromagnetic lenses with single, double, and multipole piece in electron microscope of electron optics field. The CADTEL software has been designed to run on several computer platforms and includes two types of design procedure. The first one named, analysis procedure (which is based on trial and error) where consist of three sorts called; H1 programs for magnetic scalar potential by solving Laplace's equation [1, 2], H2 and H3 programs for magnetic vector potential by solving Poisson's equation [3, 4] in linear and non linear media respectively. While the second part, named H4 programs for the synthesis procedure (inverse design). The previous types differ by the obtaining the magnetic flux density, and poles shape, while it is analog by compute and plot the lens properties which are operating at zero, low, high, and infinite magnification conditions (operation modes). CADTEL software consist of computational and plot steps of magnetic field, equipotential surfaces, flux lines, objective and projector properties, and poles shape for proposed lens design which are appear in auto visual interfaces, that are coded in visual basic language [5].
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 4; 46-55
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Barrier-free environment formation in the current urban landscape
Autorzy:
Shostak, H. S.
Powiązania:
https://bibliotekanauki.pl/articles/370636.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
route
people with limited mobility
urban space
architectural environment
adaptation
Opis:
An analysis of practical and scientific experiences in foreign countries on the barrier-free urban environment formation was made. It was identified that creating a barrier-free social spaces is possible only in context of a constant dialogue between the city administration, architects and disabled persons. The model of the route for people with limited mobility and the method of its` formation were developed on the basis of practical and scientific experience. Formation of this route is an important step towards humanization of the environment in relation to people with limited mobility.
Źródło:
Przestrzeń i Forma; 2018, 33; 195-204
1895-3247
2391-7725
Pojawia się w:
Przestrzeń i Forma
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of artificial neural network and genetic algorithm to healthcarewaste prediction
Autorzy:
Arabgol, S.
Ko, H. S.
Powiązania:
https://bibliotekanauki.pl/articles/91848.pdf
Data publikacji:
2013
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
artificial neural network
ANN
application
hospital
genetic algorithm
GA
healthcare waste
Opis:
Prompt and proper management of healthcare waste is critical to minimize the negative impact on the environment. Improving the prediction accuracy of the healthcare waste generated in hospitals is essential and advantageous in effective waste management. This study aims at developing a model to predict the amount of healthcare waste. For this purpose, three models based on artificial neural network (ANN), multiple linear regression (MLR), and combination of ANN and genetic algorithm (ANN-GA) are applied to predict the waste of 50 hospitals in Iran. In order to improve the performance of ANN for prediction, GA is applied to find the optimal initial weights in the ANN. The performance of the three models is evaluated by mean squared errors. The obtained results have shown that GA has significant impact on optimizing initial weights and improving the performance of ANN.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2013, 3, 4; 243-250
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A model to determine quantitative effects of light and temperature on organic tomato seedlings
Autorzy:
Sarıbaş, H.Ş.
Uzun, S.
Powiązania:
https://bibliotekanauki.pl/articles/12685761.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Turkey
plant cultivation
organic cultivation
greenhouse cultivation
tomato
Solanum tuberosum
seedling
light
temperature
quantitative effect
mathematical model
growth model
Opis:
The present study was conducted to determine the quantitative effects of light and temperature on growth and development of organic tomato (Solanum lycopersicum L.) seedlings in a glasshouse under ecological conditions of Samsun Province of Turkey. Seedlings were grown in four different periods (seeds sown on 29 September for 1st period; 2 December for 2nd period; 18 March for 3rd period and 6 July for 4th period). In order to create different light intensities, shading material having a shading capacity of 50% in 1, 2 and 3 layers was used in each period after seeding. The effects of light and temperature on plant growth and development (leaf area, stomatal conductivity, leaf chlorophyll content, plant height, stem diameter and total plant vegetative dry weight) and the number of days from sowing to plantation of seedlings, were investigated. Obtained results revealed decreasing number of days from sowing to seedling plantation with increasing light intensities. Finally, the number of days from sowing to seedling plantation to be used in organic tomato seedling production was modeled based on the variations in temperature and light intensity (r2 = 0.92).
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 3; 175-185
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Temperature and Carbon Nanocapsules (CNCs) on the Production of Poly(D,L-lactic acid) (PLA) Nonwoven Nanofibre Mat
Wpływ temperatury i nanokapsułek węglowych (CNCs) na produkcję mat wykonanych z nanowłókien PLA
Autorzy:
Chien, H S
Wang, C
Powiązania:
https://bibliotekanauki.pl/articles/233036.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
nonwovens
nanofibres
carbon nanocapsules
nanowłókna PLA
nanokapsułki węglowe CNCs
produkcja mat
Opis:
Solution viscosity can be regarded as the most important factor in determining the morphology of the product obtained in electrospinning. Viscosity can be adjusted for a given solution by tuning the solution temperature or by adding fillers to the solution prepared. The electrospinning of PLA solution was performed at a temperature ranging from 25 to 100 °C to determine the effects of temperature on fiber morphology. For the solution of sufficiently high entanglement density (i.e., 20 wt%), the as-spun fiber diameter was in the range of 330 ± 20 nm because the electrospinning was conducted at elevated temperatures. In contrast, for the solution without sufficient entanglement density (i.e., 13 wt%), the solution entanglement density was enhanced by the addition of fillers, which caused the as-spun fibers to become smooth. The fiber diameter obtained was in the range of 90 ± 10 nm. By varying the solution temperature, the chain entanglement status existing in the solution remained intact. In contrast, the chain entanglement density could be enhanced by the addition of fillers. However, both temperature and fillers significantly altered the solution viscosity. Therefore a complete understanding of the temperature and filler effect on the solution and electrospinning gave rise to a feasible route for manipulating the as-spun fiber diameter.
Lepkość roztworu można uznać za najważniejszy czynnik dla określenia morfologii produktu otrzymanego w procesie elektroprzędzenia. Lepkość może być dostosowana do danego roztworu przez regulację temperatury roztworu lub przez dodanie wypełniaczy do przygotowanego wcześniej roztworu. Elektroprzędzenie roztworu PLA prowadzono w zakresie temperatur od 25 do 100 °C w celu wyznaczenia wpływu temperatury na morfologię włókien. Przy roztworach o wysokim stopniu splatania łańcuchów polimeru (np., 20 wt%), dzięki prowadzeniu procesu przędzenia w wysokiej temperaturze udało się zredukować średnicę włókien do 330 ± 20 nm. Przy mniejszym stopniu splatania łańcuchów polimeru (np. 13 wt%) dodawano wypełniacze i uzyskiwano średnice włókien 90 ± 10 nm. Pełne zrozumienie wpływu temperatury i zastosowanych wypełniaczy na roztwór i proces elektroprzędzenia jest ważny dla otrzymywania określonej średnicy przędzonych włókien.
Źródło:
Fibres & Textiles in Eastern Europe; 2013, 1 (97); 72-78
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uplink NOMA Scheme for Wi-Fi Applications
Autorzy:
Ghazi, H. S.
Wesołowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/226180.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
5G
Non-Orthogonal Multiple Access
NOMA
Successive Interference Cancellation
SIC
Opis:
Non-Orthogonal Multiple Access (NOMA) with Successive Interference Cancellation (SIC) is one of the promising techniques proposed for 5G systems. It allows multiple users with different channel coefficients to share the same (time/frequency) resources by allocating several levels of (power/code) to them. In this article, a design of a cooperative scheme for the uplink NOMA Wi-Fi transmission (according to IEEE 802.11 standards) is investigated. Various channel models are exploited to examine the system throughput. Convolutional coding in conformance to IEEE 802.11a/g is applied to evaluate the system performance. The simulation results have been addressed to give a clear picture of the performance of the investigated system.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 4; 481-485
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Fe Content on the Contact Resistance of Electroplated Au-Fe Alloy Layers
Autorzy:
Park, H. S.
Son, I.
Powiązania:
https://bibliotekanauki.pl/articles/352468.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electroplating
Au-Fe alloy
contact resistance
thermal aging
Opis:
In this study, variations in the contact resistance of electroplated Au-Fe alloy layers with Fe content were investigated. The contact resistance of electroplated Au-Fe alloy layers that were subject to thermal aging at 260°C in the atmosphere, tended to increase significantly with an increase in the Fe content. Through an analysis method employing X-ray photoelectron spectroscopy (XPS/ESCA) and Auger electron spectroscopy (AES), Ni oxides, such as NiO and Ni2O3, on the surface of the thermally aged electroplated Au-Fe alloy layers were observed. It is believed that the Ni oxide existing on the surface diffused from the underlying electroplated Ni layers to the surface through the grain boundaries in the electroplated Au-Fe layers during the thermal aging. As the Fe content in the electroplated Au-Fe layers increased, the grain size decreased. As the grain size decreases, more Ni oxide was detected on the surface. Therefore, with a rise in the Fe content, more Ni diffuses to the surface via grain boundaries, and more Ni oxide is formed on the surface of the electroplated Au-Fe layers, increasing the contact resistance of the electroplated Au-Fe alloy layers.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1503-1507
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The new, parametrised IPTV Model for Determining the Quality in the IPTV Service
Autorzy:
Uhl, T.
Jürgensen, H. S.
Powiązania:
https://bibliotekanauki.pl/articles/201479.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
communication networks
communication services
IP transport platform
QoS measurement techniques
sieci komunikacyjne
usługi komunikacyjne
platforma transportowa IP
techniki pomiarowe QoS
Opis:
This paper describes a new measurement method for determining the quality of the IPTV (Television over IP) service. This method uses the latest IPTV Model and is one of a number of parameter-based measuring techniques (offline operation, i.e. without intrusive measurement). It delivers results that come very close to those of the corresponding Perceptual Evaluation of Video Quality (PEVQ) curves. The method is quickly and easily implemented - one of the great advantages of using this method to measure QoS.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 495-500
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 2306

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