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Tytuł:
Fusion reaction study of halo system by quantum mechanical-based model for ⁶He+⁶⁴Zn, ⁸B+⁵⁸Ni and 8He+¹⁹⁷Au systems
Autorzy:
Abd Madhi, Maryam H.
Majeed, Fouad A.
Powiązania:
https://bibliotekanauki.pl/articles/2086832.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
semi-classical treatment
fusion barrier distribution
halo nuclei
fusion cross-section
continuum discretized coupled channels
półklasyczne działanie
dystrybucja bariery termojądrowej
jądro halo
przekrój fuzji
kanał sprzężony
Opis:
In the current work the calculations of the reaction cross-section of total fusion σ fus, the fusion barrier distribution D fus, and the probability P fus were achieved for systems ⁶He+⁶⁴Zn, ⁸B+⁵⁸Ni and ⁸He+¹⁹⁷Au which involve halo nuclei by using a semiclassical approach. The semiclassical and quantum mechanics treatments comprise the approximation of WKB for describing the relative motion among projectile nuclei and target nuclei, and the method of CDCC (Continuum Discretized Coupled Channel) for describing the intrinsic motion for the projectile and target nuclei. Our semiclassical calculations yielded findings that were compared to obtainable experimental data as well as quantum mechanics calculations. For fusion cross-sections σ fus below and above the Coulomb barrier Vb, the quantum mechanics coupled channels are very similar, according to the experimental results.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 4; e137734, 1--6
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis and evaluation of massive MIMO system
Autorzy:
Al-Rawi, Muaayed F.
Abbou, Izz K.
Al-Awad, Nasir A.
Powiązania:
https://bibliotekanauki.pl/articles/118039.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
performance analysis
MIMO
Rician fading channels
analiza wydajności
zanikający kanał Rician
Opis:
This article examines the performance of massive MIMO uplink system over Rician fading channel. The performance is estimated regarding spectral efficiency versus number of base station antennas utilizing three plans of linear detection, maximum-ratio-combining (MRC), zero forcing receiver (ZF), and minimum mean-square error receiver (MMSE). The simulation results reveal that the spectral efficiency increments altogether with expanding the quantity of base station antennas. Additionally, the spectral efficiency with MMSE is superior to that with ZF, and the last is superior to that with MRC. Furthermore, the spectral efficiency diminishes with expanding the fading parameter.
Źródło:
Applied Computer Science; 2020, 16, 2; 112-119
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PUBLIC-CIVILIAN COMMUNICATIVE NETWORK AS A PHENOMENON IN PUBLIC ADMINISTRATION
PUBLICZNA SIEĆ KOMUNIKACYJNA W ADMINISTRACJI PUBLICZNEJ
Autorzy:
Aleksandrovych Romanenko, Yevhen
Nikolaevich Коzakov, Volodymyr
Vіtalіivna Chaplay, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/567851.pdf
Data publikacji:
2017-12
Wydawca:
Międzynarodowy Instytut Innowacji Nauka – Edukacja – Rozwój w Warszawie
Tematy:
public-civilian communicative network
economic growth
modernization of thepolicy
technocratization of public administration
strengthening of the mechanisms and channels of the state-civilian communicative network
publiczna sieć komunikacyjna
wzrost gospodarczy
modernizacja polityki państwa
technokratyzacja administracji publicznej
wzmocnienie mechanizmów i kanałów państwowo-cywilnej sieci komunikacyjnej
Opis:
For many years, Ukraine is not entirely able to reverse the dangerous tendencies of growing distrust of the public to the activities of state authorities. In particular, the promises of public authorities regarding the improvement and development of information and communication technologies that are used both in the activities of state authorities, in narrow circles of specialists, and in everyday life of ordinary people are not fully fulfilled. The state-civil communicative network is one of the main directions of stimulating economic growth, employment, expansion of competition and, as a result, contributing to overcoming "digital isolation", both social and geographic. Without the state-civilian communicative network it is virtually impossible to execute management decisions, to make feedback and to correct the goals and stages of the activity of state authorities.
Już przez dłuży okres Ukraina nie jest w stanie całkowicie odwrócić niebezpiecznych tendencji rosnącej nieufności społeczeństwa do działań władz państwowych. W szczególności dotyczy to obietnic władz co do poprawy i rozwoju technologii informacyjno-komunikacyjnych, wykorzystywanych zarówno w działaniach władz państwowych, w działalności specjalistycznej, jak i w codziennym życiu zwykłych ludzi, które nie są w pełni spełniane. Publiczna sieć komunikacyjna jest jednym z głównych kierunków stymulowania wzrostu gospodarczego, zatrudnienia, rozwoju konkurencyjności co w konsekwencji przyczynia się do przezwyciężenia "cyfrowej izolacji", zarówno społecznej, jak i geograficznej. Bez publicznej sieci komunikacyjnej praktycznie niemożliwe jest podejmowanie decyzji zarządczych, przekazywanie informacji zwrotnych i korygowanie celów i etapów działalności organów państwowych.
Źródło:
International Journal of Legal Studies (IJOLS); 2017, 2(2); 287-293
2543-7097
2544-9478
Pojawia się w:
International Journal of Legal Studies (IJOLS)
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of climate changes on the Santos Harbor, São Paulo State (Brazil)
Autorzy:
Alfredini, P.
Arasaki, E.
Pezzoli, A.
Fournier, J.
Powiązania:
https://bibliotekanauki.pl/articles/117446.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Climate Changes
Santos Harbor Area (SHA)
Sao Paulo Coastline
Brazilian Coast
Access Channels
Flooding
Overall Depth Necessary for a Safe Navigation (ODSN)
safety at sea
Opis:
Santos Harbor Area (SHA) in Sao Paulo Coastline (Brazil) is the most important marine cargo transfer terminal in the Southern Hemisphere. A long term relative tidal level variability assessment shows a consistent response to relative sea level rise. A wave data base Wave Watch III was compared with a long term wave data-base generated by the ERA40-ECMWF (2003), both local validated. The current bed level of SHA Outer Channel is -15.00 m (Chart Datum or, in abbreviation, CD), maintained by dredging. According to the cargo throughput forecast, in 2025, the Access Channel will have to be deepened to level of -17.00 m. The feasibility of that choice is discussed from a technical, economical and conceptual navigation point of view in that context. A data set found from a scale model of the whole area of Santos Bay, Estuary and nearby beaches, showed the impact of maritime climate changes upon the coastal area. In the previous researches developed by the authors, it was demonstrated that the wave climate, the tides and tidal currents affect harbor and coastal structures maintenance, beaches stability, tidal inlet, sediment transport, saline intrusion and wetlands. Considering the increasing of the sea hazards and the high values of the infrastructures in that coastline, it is necessary to mitigate the risks. Hence, based on the results obtained by the authors, are highlighted guidelines strategies suggested for Access Channels dimensions, wharves free-board, jetties dimensions, dredging rates, rigid and flexible littoral defenses and land protection against flooding (including wetlands).
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 609-617
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the impact of selected communication channels on the selected city population’ opinion
Analiza wpływu wybranych kanałów komunikacji na opinię populacji wybranego miasta
Autorzy:
Bacik, R.
Mihal, J.
Fedorko, R.
Powiązania:
https://bibliotekanauki.pl/articles/404878.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska
Tematy:
marketing communication channels
public opinion
communication strategy of city
city image
kanały komunikacji marketingowej
opinia publiczna
strategia komunikacyjna miasta
wizerunek miasta
Opis:
The aim of the article is to describe specific aspects of communication media in city marketing from the perspective of city residents. The article clarifies the impact of selected marketing communication channels on building a positive image in the eyes of the population, and proposes a model of the efficient use of these channels focused on the satisfaction of citizens. In assessing the direction of the issue the article summarizes the theoretical basis of public relations in the online environment, the issue of public opinion and image. Another aim of the article is to evaluate the opportunities this issue brings for marketers while pointing out its pitfalls.
Celem artykułu jest przedstawienie określonych aspektów środków komunikacji w marketingu miasta z perspektywy mieszkańców miasta. Artykuł objaśnia wpływ wybranych kanałów komunikacji marketingowej na budowanie pozytywnego wizerunku w oczach społeczeństwa i proponuje model efektywnego wykorzystania tych kanałów skoncentrowanych na zadowoleniu mieszkańców. Artykuł podsumowuje teoretyczne podstawy public relations w środowisku online, kwestie opinii publicznej i wizerunku. Innym celem artykułu jest ocena możliwości, jakie daje to marketingowcom, zwracając jednocześnie uwagę na związane z tym pułapki.
Źródło:
Polish Journal of Management Studies; 2015, 12, 2; 7-14
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Telewizyjne kanały tematyczne w Polsce w kontekście przemian technologicznych i dominacji nowych mediów
Autorzy:
Bańburski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1186995.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
thematic television channels
TV
Polish television market
media groups
viewership data
viewership
terrestrial television
cable TV
satellite TV
Opis:
In the article, a broad topic of thematic channels on the Polish market has been taken up. Thematic channels, increasingly popular and obtaining more and more media coverage, fit well into the landscape of television, gaining a large audience and changing the way television is perceived by Poles. The author proposes various ways of categorizing thematic channels, because of: the type of concessions, thematic segments, television signal sources, media groups, financing methods. He provides information on viewership of the station. He also focuses on alternative (to traditional television) ways of receiving audio content (videotapes, DVD players, home video systems, smart TVs, hybrid TVs, on-demand services), and defines how they have influenced the shape of contemporary television as well as the development of thematic channels.
Źródło:
Załącznik Kulturoznawczy; 2017, 4; 177-200
2392-2338
Pojawia się w:
Załącznik Kulturoznawczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of water quality in open channels flowing through Beni-Mellal City (Morocco)
Ocena jakości wody w otwartych kanałach płynących przez miasto Beni-Mellal (Maroko)
Autorzy:
Barakat, A.
El Baghdadi, M.
Meddah, R.
Rais, J.
Nadem, S.
Afdali, M.
Powiązania:
https://bibliotekanauki.pl/articles/292626.pdf
Data publikacji:
2013
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
urban channels
physicochemical parameters
wastewater
water quality
jakość wody
kanały miejskie
parametry fizyczno-chemiczne
ścieki
Opis:
The water quality of the open channels (Foughal, OumDhar and Tamagnounte) flowing into Beni-Mellal city were assessed in a bid to determine impacts of anthropogenic activities. Physicochemical and bacteriological parameters comprising temperature, pH, alkalinity, electrical conductivity, oxidizability, total hardness, ammonia, nitrite, nitrate, total coliforms, fecal coliforms and geochemical analyses were determined for the channels water before reaching the irrigation areas. While biological parameters demonstrated substantial variability, other parameters showed relatively little spatial variations. The spatial variations in water quality may be attributed to the effects of the urban wastewater discharge in the channels and to surface urban and agricultural runoff. Compared with drinking water quality standards of Moroccan and WHO, the results indicated that the channels water was suitable for drinking purpose with prior treatment. Various determinants such as electrical conductivity, residual sodium carbonate, total dissolved solids and hardness revealed that all water samples were suitable for irrigation.
Oceniono wpływ działalności człowieka na jakość wody w otwartych kanałach (Foughal, OumDhar i Tamagnounte), dostarczających wodę do miasta Beni-Mellal. Zmierzono takie parametry fizyczne, chemiczne i bakteriologiczne, jak: temperatura, pH, alkaliczność, przewodnictwo elektrolityczne, utlenialność, twardość całkowitą, jony amonowe, azotyny, azotany, całkowitą liczbę bakterii coli, bakterie pochodzenia kałowego oraz przeprowadzono analizy geochemiczne w wodzie kanałów przed jej wprowadzeniem do systemów nawadniających. Podczas gdy parametry biologiczne wykazywały znaczną zmienność, pozostałe parametry cechowała stosunkowo niewielka zmienność przestrzenna. Na zmienność jakości wody w przestrzeni mogą wpływać ścieki miejskie spuszczane do kanałów oraz powierzchniowy spływ z terenów miejskich i obszarów rolniczych. Uzyskane wyniki porównane do norm jakości wody pitnej obowiązujących w Maroku i norm WHO pokazują, że woda w kanałach nadaje się do spożycia po wstępnym uzdatnieniu. Różne wskaźniki, takie jak przewodnictwo elektrolityczne, stężenie węglanu sodu, ilość całkowitej zawiesiny i twardość dowodzą, że analizowane wody nadają się do nawodnień.
Źródło:
Journal of Water and Land Development; 2013, no. 19 [VII-XII]; 3-11
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transmembrane segment M2 of glycine receptor as a model system for the pore-forming structure of ion channels.
Autorzy:
Bednarczyk, Piotr
Szewczyk, Adam
Dołowy, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1043689.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
black lipid membrane
ion channels
glycine receptor
Opis:
The glycine receptor belongs to the ligand-gated ion channel superfamily. It is a chloride conducting channel composed of four transmembrane domains. It was previously shown that the second transmembrane domain (M2) of the glycine receptor forms an ion conduction pathway throught lipid bilayers. The amino-acid sequence of the transmembrane segment M2 of the glycine receptor has a high homology to all receptors of the ligand-gated ion channel superfamily. In our report, we have used a synthetic M2 peptide. It was incorporated into a planar membrane of known lipid composition and currents induced by M2 were measured by the Black Lipid Membrane technique. When the planar lipid bilayer was composed of 75% phosphatidylethanolamine and 25% phosphatidylserine, the reversal potential measured in a 150/600 mM KCl (cis/trans) gradient was -19 mV suggesting that the examined pore was preferential to anions, PK/PCl = 0.25. In contrast, when 75% phosphatidylserine and 25% phosphatidylethanolamine was used, the reversal potential was +20 mV and the pore was preferential to cations, PK/PCl = 4.36. Single-channel currents were recorded with two predominant amplitudes corresponding to the main-conductance and sub-conductance states. Both conductance states (about 12 pS and 30 pS) were measured in a symmetric solution of 50 mM KCl. The observed single-channel properties suggest that the selectivity and conductance of the pore formed by the M2 peptide of the glycine receptor depend on the lipid composition of the planar bilayer.
Źródło:
Acta Biochimica Polonica; 2002, 49, 4; 869-875
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jezioro Aralskie - największa katastrofa ekologiczna minionego stulecia
Aral sea - the bigger ecological disaster of the century
Autorzy:
Bielecki, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/471691.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
jezioro reliktowe
delta Amu-darii
delta Syr-darii
kanały nawadniające
pustynnienie
relict lake
Amu-Darya delta
Syr-Darya delta
irrigation channels
deserfitication
Opis:
One of the best examples of environmental risk arising as a result of inefficient management of environmental resources is the disappearance of the Aral Sea. Aral Sea extends into the territories of Kazakhstan and Uzbekistan. About 10 thousand years ago, this vast body of water was under the influence of water from melting mountain glaciers, flowing directly into the Aral Basin. However, the climate change which started about 3500 years ago contributed to the drying process of the tank. This process became stronger in character at the beginning of the 1960s, when due to the planned economy of the USSR, it was decided to develop large-scale cultivation of cotton in areas too dry to be suitable for such crops. Therefore, the water from the rivers Syr-Darya and Amu-Darya, flowing into the Aral Sea, was directed to irrigation, without worrying about the ecological balance. Consequently, this led to irreversible environmental changes. The Aral Sea Area decreased by 40% and its volume decreased by two-thirds. Water level dropped about 13 feet and is still falling. Historically, the reservoir was fed by more than 60 km3 of water per year; currently it is only about 5 km3. There were years when the lake received virtually no water as a result of these processes. In 1988 a division of the lake into two parts was carried out: the Big Aral Sea in the south and the Small Aral Sea in the north. The salinity of water remaining in the basin has increased roughly three fold ,which has disastrous consequences for the world’s flora and fauna. The Aral Sea region’s economy disappeared completely, e.g. the fisheries and associated processing industries, a sin water with such high salt content no organisms are able to survive. As the lake shrank and large parts of it are now dry, when strong winds blow across the land, they carry huge amounts of tiny particles of salt remaining after the water has evaporated. It has been calculated that in the year after such a dust storm around 75 million tonnes of sand mixed with salt was spread. The toxic dust destroys settlings, fields, and plants, and it is difficult to find a way to counteract this process.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis Studia Geographica; 2010, 1 Dynamika zmian środowiska geograficznego pod wpływem antropopresji; 6-13
2084-5456
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis Studia Geographica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin and electron density redistribution upon binding of non-innocent ligand by iron in enzymatic environment: challenges for quantum chemistry
Autorzy:
Brocławik, E.
Borowski, T.
Radoń, M.
Powiązania:
https://bibliotekanauki.pl/articles/1954255.pdf
Data publikacji:
2022-02-01
Wydawca:
Politechnika Gdańska
Tematy:
N,O ligand
Fe
DFT
electron density transfer channels
kanały transferu gęstości elektronowej
Opis:
The quality of the description of a chemical bond between the metal (active site) and the ligand (substrate) critically depends on the electronic processes accompanying the bond formation. However, as far as transition metal centers (TM) in enzymes are considered, most of the properties related to their electronic structure are extremely challenging for quantum chemistry. Especially severe problems appear for the bonding of NO to ferrous sites, e.g. in myoglobin or non-heme enzymes. Therefore, special care has to be shown in the assessment of a quantum chemical method employed with respect to its power in describing the properties of interest. In this work we discuss spin-resolved Fe-NO charge transfers and their relation to the metal spin state, with special attention paid to the interpretation of the bonding between NO and the transition metal center in terms of dative or covalent contributions; furthermore, the impact of spin and the electron transfer on the reactivity of the center is discussed. The stress is put on the role of the coordinating environment in controlling the reaction mechanism via fine-tuning of the spin and the oxidation status of the metal core. This goes in line with the high significance of spin in enzymatic reaction mechanisms (cf. multi-state reactivity proposed for iron enzymes).
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2014, 18, 3; 255--263
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and measurement studies of the VDES system’s terrestrial component
Autorzy:
Bronk, Krzysztof
Koncicki, Patryk
Lipka, Adam
Rutkowski, Dominik
Wereszko, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/258780.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
maritime radiocommunications
E-navigation
VHF Data Exchange System
VDE-TER
Maritime VHF channels
Opis:
In the paper, the measurement and simulation results of the VDES (VHF Data Exchange System) terrestrial component are discussed. It is anticipated that VDES will be one of the major solutions for maritime communications in the VHF band and its performance will be sufficient to fulfill the requirements of the e-navigation applications. The process of the VDES standardization (ITU R, IALA) has not been officially completed yet, but substantial amount of technical information about the future system’s terrestrial component (VDE-TER) is already available. The paper is divided into three general parts: (a) theoretical presentation of the system’s physical layer and the radio channels applicable to VDES, (b) simulation results (BER, BLER, channel delay between two propagation paths and its influence on bit rates) and (c) measurement results (useful ranges, BER). It turned out that in real maritime conditions, the VDES system can offer ranges between 25 and 38 km for the configurations assumed during the measurement campaign. Those results are generally compliant with the theoretical data in the line-of-sight conditions. In the NLOS scenarios, where fading becomes the dominant phenomenon, the discrepancies between the measurements and the theoretical results were more significant. The obtained results confirmed that VDES provides a large coding gain, which significantly improves the performance of data transmission and increases the bit rate compared to the existing maritime radiocommunication solutions. It should be noted that the results presented in the article were used by the IALA while developing the current version of the VDES specification.
Źródło:
Polish Maritime Research; 2019, 1; 95-106
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheodynamics non-viscous medium in long (cylindrical) pipes: using the Ostwald-De Ville model
Autorzy:
Brovatets, Oleksandr
Chоvniuk, Yuiry
Moskvitina, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1833884.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
rheodynamics
nonlinear viscous medium
long channels
round channel sections
rectangular channel sections
Ostwald-de Waele model
heat transfer
non-isothermal flow
heat exchangers
polyethylene glycol
ethylene glycol
Opis:
While heating the soil in greenhouses, ground heat exchangers are used, as well as when accumulating heat in soil massifs for further use of heat by heat pumps, or when accumulating heat from solar collectors in heat accumulators. In such cases, a coolant moves in the heat exchangers, which will not freeze or boil, most often these are solutions polyethylene/ethylene glycol, which belong to nonlinear viscous fluids. In this work, the nonisothermal motion of a nonlinear-viscous fluid (within the framework of the Ostwald - de Ville model) in a flat channel with a given heat flow on the wall is investigated. A characteristic feature of the flow of such media is their high thermal sensitivity due to phase and structural transformations. Therefore, with a change in temperature, there is a sharp change in rheological properties. For a number of materials, for example, for polyethylene glycol (ethylene glycol) mixtures, for glycerol solutions, these changes can occur in a fairly narrow temperature range. The flow in a channel is considered, the length of which is much greater than the length of the hydrodynamic and thermal initial sections. The case is investigated when the temperature changes along the channel. Channels of arbitrary cross-section (and, in particular, rectangular and circular) are considered. The situation is analyzed when the temperature changes along the channel, and this change is rather weak in relation to the temperature change along the channel walls (in the transverse direction, that is, in the plane of symmetry). To describe the state of the system, the so-called state diagram (dependence of the temperature on the axis of symmetry of the channel on the heat flux).
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2020, 9, 2; 19--22
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANALGESIC AND ANTI-INFLAMMATORY ACTIVITY OF NEW ANALOGUES OF HC-030031: A TRPA1 CHANNEL ANTAGONIST
Autorzy:
Bryła, Adrian
Ślusarczyk, Marietta
Zygmunt, Małgorzata
Chłoń-Rzepa, Grażyna
Kazek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/895336.pdf
Data publikacji:
2020-02-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
inflammation
pain
TRPA1 channels
HC-030031 analogues
Opis:
One of our study direction is research in the group of compounds affecting the TRPA1 ion channel which can perform an important function in pain (including neuropathic pain) and inflammation for example in asthma and other chronic respiratory diseases. The aim of this study was to evaluate the analgesic and anti-inflammatory activity of two analogues of HC-030031 analogues belonging to nitrogen derivatives of heterocyclic system: xanthine (cmpd 1) and benzimidazole (cmpd 2) with hydrazide and amide moieties respectively In this paper, for two derivatives (cmpd 1 and cmpd 2) potential analgesic and anti-inflammatory/anti-edematous activities were evaluated in animal models of pain in mice (writhing response test, formalin test) and inflammation in rats (carrageenan-induced paw edema test). Both the tested compounds 1 and 2 showed a significant analgesic and anti-inflammatory activity.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 113-119
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of the riverbed of river Dniester using GIS technologies
Monitoring koryta rzeki Dniestr z wykorzystaniem technologii GIS
Autorzy:
Burshtynska, K.
Halochkin, M.
Tretyak, S.
Zayats, I.
Powiązania:
https://bibliotekanauki.pl/articles/130314.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
channel processes
monitoring
flooding
displacement of channels
space image
topographic maps
procesy koryt rzecznych
powodzie
meandrowanie rzek
zdjęcia satelitarne
mapy topograficzne
Opis:
The paper analyses the causes of riverbeds shifts and meandering of Dniester. Among such reasons are mostly climatic, geographical and anthropogenic factors, such as frequent floods semi-stable rocks and soils, deforestation and removal of gravel and sand material from the river bed. The research is carried out on the lowland of the Dniester along the 100 km section over the 100 years period. Topographic maps (1910, 1923, 1976 years), and satellite images from Landsat 5 (1986) Landsat 7 (2000) Sentinel (2017) and special soil maps was taken as initial information. The Dniester meandering research shows significant correlation in horizontal riverbed movements for the periods from 1910 till 1986 and from 1984 till 2017. Correlation rate variate within the limits 0.97 – 0.99 respectively that corresponds to the almost full dependence in the riverbed displacement configuration. Beside that the maximum horizontal deviations can reached up to 800 meters. In addition, it was revealed that sediment processes caused significant increase in the area of the river islands from 1910 to 1976 by 2.4 times, and from 1976 to 2017 the island areas somewhat reduced. Nearly the largest island River channel is divided into two branches. Sinuosity coefficient is 2.3 over the test site. The analysis of soil maps shows prevailing bleached soils and loamy on alluvial deposits soils in areas with highest sinuosity coefficient.
Za główne przyczyny przemieszczenia się i meandrowania koryta rzek uznaje się zjawiska klimatyczne, a także czynniki geograficzne i antropogeniczne. Częste powodzie, określone rodzaje skał i gruntów, wylesienia i wymywanie żwiru i piasku z łożyska powodują przemieszczenie rzeki. Prezentowane badania przemieszczeń dotyczą równinnej części rzeki Dniestr. Analiza została przeprowadzona na odcinku rzeki długości około 100 km i dotyczy okresu minionych 100 lat. Do badań wykorzystano mapy topograficzne z lat 1910, 1923, 1976 i zdjęcia satelitarne z satelity Landsat 5 (1986), Landsat 7 (2000) i Sentinel (2017), a także mapy gruntów. Z badań meandrowania rzeki Dniestr w okresach 1910-1986 i 1984-2017 określono związki korelacyjne między przemieszczeniami sytuacyjnymi, które wyrażone w formie współczynnika korelacji wynoszą odpowiednio 0.99 i 0.97, co świadczy o prawie całkowitym związku kształtów łożysk. Jednocześnie wyjaśniono że maksymalne przemieszczenia łożyska rzeki na odcinkach 1 i 2 wynoszą blisko 800 m, a na odcinku 5 do 100 m. Wyjaśniono, że zwiększenie niesionych osadów spowodowało w latach od 1910 do 1976 znaczny wzrost powierzchni wysp (około 2,4 razy), a w latach od 1976 do 2017 powierzchnia wysp zmniejszyła się, jednak w miejscu największej wyspy koryto podzieliło się na dwa rękawy. Ogółem krętość koryta na badanym fragmencie wynosi 2.3, co świadczy o tym że koryto jest meandrujące. Analiza mapy gruntów w miejscach maksymalnego meandrowania wskazuje, że głównymi typami gruntów są gleby łąkowe bielicowe i oglejone na złożach naniesionych.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2017, 29; 25-36
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Programy wyspecjalizowane jako zadanie w realizacji misji publicznej nadawcy publicznego
Autorzy:
Chałubińska-Jentkiewicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2231127.pdf
Data publikacji:
2014-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Public service broadcasting
theme channels
the mission of PSB
The State aid
The State financing of public service broadcasters
public services
non-public service
Opis:
The remit of public service broadcasting includes the obligation of universal programming, which covers all kinds of programmes such as culture, news, entertainment and sport. Several European Union documents stress the special role of Public Service Broadcasting (PSB) in society and acknowledge a far-reaching autonomy of Member States to define and finance their national system of public service broadcasting. All European countries have defined remits for their public service broadcasters. The definition of the mission of PSB in Poland is only related to the activity of the public radio and television. Also the way PSB gives account for its programme activities, and the control of the way PSB fulfils its remit. Theme channels are part of the remit of public service broadcasting. These channels are considered as important and almost self-evident activities of PSB. Nevertheless there is a need for such provisions to define the mission of PSB in Poland. This is necessary to further specify the criteria used to determine whether a service of theme channels which are transmitted by the public television is of an economic or a non-economic nature. This is the most important because of the requirements of state financing of public service broadcasters. These transparency requirements are internal accounts corresponding to different activities – public service and non-public service activities must be separated.
Źródło:
Themis Polska Nova; 2014, 1(6); 124-142
2084-4522
Pojawia się w:
Themis Polska Nova
Dostawca treści:
Biblioteka Nauki
Artykuł

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