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Wyświetlanie 1-15 z 20
Tytuł:
Development and research of additional parameters of steganographic systems
Autorzy:
Afanasyeva, O.
Powiązania:
https://bibliotekanauki.pl/articles/135452.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
steganosystem
digital environment
hiding messages
parameter of data concealing
steganogram
Opis:
This paper contains research on and methods of determining values for basic parameters of steganographic systems. In particular, a parameter of concealing the presence of information in a digital environment is researched. Using this particular parameter increases the degree of protection of a message introduced into a digital environment. This parameter is one of the fundamental ones in case of implementation of a steganalysis system. Besides that, this paper contains a review of parameters of redundancy of a digital environment and the parameter of steganogram resistance to technological transformations in digital environments.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 48 (120); 161-170
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatio-temporal pattern of phytoplankton and pigment composition in surface waters of sSsouth-Eastern Black Sea
Autorzy:
Agirbas, E.
Koca, L.
Aytan, U.
Powiązania:
https://bibliotekanauki.pl/articles/48419.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
phytoplankton
pigment composition
environment parameter
surface water
nutrient
Baltic Sea
high performance liquid chromatography
microscopic analysis
Opis:
Phytoplankton community, diatom to dinoflagellate ratio and pigment composition in surface waters with nutrient data from April 2013 to March 2014 were monitored in the south-eastern (SE) Black Sea using high performance liquid chromatography (HPLC) and microscopic analyses. Microscopic examination revealed a total of 71 species that consist of dinoflagellate (58%), diatoms (25%) and other groups (17%). Microscopy and HPLC-based pigment analyses revealed almost similar results which suggest that the phytoplankton community is mainly composed of diatoms, dinoflagellates and coccolithophores. Fucoxanthin (mean 0.35 ± 019 μg L−1), peridinin (mean 0.18 ± 0.14 μg L−1) and 19-hexanoyloxyfucoxanthin (mean 0.24 ± 0.15 μg L−1) are prominent pigments which showed significant correlation with Diatom-C (r2 = 0.63–0.71, p < 0.05), Dinoflagellate-C (r2 = 0.49–0.80, p < 0.05) and Coccolithophore-C (r2 = 0.72–0.82, p < 0.05), respectively. Mean carbon biomass of diatoms (36.50 ± 9.72 μg L−1) was higher than that of dinoflagellates (33.32 ± 9.05 μg L−1). Significant differences were also observed in nutrient ratio (N:P and Si:N) (One-way ANOVA, p < 0.05). Results illustrate that HPLC-based pigment approach can be used for taxonomic characterisation of phytoplankton groups in the SE Black Sea. Moreover, relatively high dinoflagellate species dominancy and significant correlations between Phyto-C and marker pigments indicate that phytoplankton community composition is shifting towards much smaller groups in SE coasts of the Black Sea.
Źródło:
Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehkologicheskaja kharakteristika raboty solnechnykh i vetrovykh ehlektrostancijj
Environmental characteristic of solar and wind power plants
Autorzy:
Bekirov, Eh.
Furcenko, N.
Powiązania:
https://bibliotekanauki.pl/articles/76940.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
environmental safety
renewable energy
power plant
wind power plant
solar power plant
energy conservation
energy source
environment parameter
Opis:
Environmental safety characteristics of solar and wind power plants during the construction and operation are investigated. Issues of a solar cells production and a land allocation for renewable energy sources are discussed.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-term variation of zooplankton community in Cintra Bay (Northwest Africa)
Autorzy:
Berraho, A.
Abdelouahab, H.
Baibai, T.
Charib, S.
Larissi, J.
Agouzouk, A.
Makaoui, A.
Powiązania:
https://bibliotekanauki.pl/articles/49175.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
short-term variability
copepod
diversity index
environment parameter
spatial-temporal distribution
Cintra Bay
Africa
Źródło:
Oceanologia; 2019, 61, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vanadium pentoxide application for the synthesis of NaVO3 in the presence of oxygen
Autorzy:
Białowicz, K.
Trypuć, M.
Mazurek, K.
Kiełkowska, U.
Powiązania:
https://bibliotekanauki.pl/articles/779433.pdf
Data publikacji:
2008
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
środowisko
synteza
identyfikacja parametrów
metawanadan sodu
environment
synthesis
parameter identification
unit operations
sodium metavanadate
Opis:
Investigation was carried out on the optimal conditions of the synthesis of NaVO3 and Cl2 from NaCl and V2O5 in the presence of the atmospheric oxygen. The influence of the excess of NaCl relative to V2O5 was investigated. Also the effect of the quartz sand introduced into the reaction mixture on the yield of the NaVO3 synthesis was determined. The obtained product of synthesis was isolated from the post-reaction mixture.
Źródło:
Polish Journal of Chemical Technology; 2008, 10, 4; 4-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Baltic Sea circumstances significant for its critical infrastructure networks
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069028.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
Baltic Sea
geographic characteristic
abiotic parameter
climate and weather
environment protection
critical infrastructure
Opis:
The paper is an overview of the Baltic Sea and its basin characteristic. The geographical location and climate and weather of the Baltic Sea region according to its zones and seasons were described. Moreover, the abiotic parameters of water such as salinity, oxygen concertation and temperature distribution in the water column were explained. Some of these characteristic parameters has influence on the critical infrastructure networks existed in the Baltic Sea region as well as the critical infrastructure objects activity has significant impact on these parameters changes and consequently the environmentally quality of the region. Finally, the Baltic Sea as the sensitive area is presented.
Źródło:
Journal of Polish Safety and Reliability Association; 2016, 7, 2; 37--42
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of LabView environment for the bulding of supervision system controlling the climatic and technical parameters in farm rooms
Wykorzystanie srodowiska LabView do budowy systemu nadzoru kontrolujacego parametry klimatyczne i techniczne w pomieszczeniach w gospodarstwie rolnym
Autorzy:
Buczaj, M.
Sumorek, A.
Powiązania:
https://bibliotekanauki.pl/articles/792957.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
control system
supervising system
LabView environment
climatic parameter
technical parameter
building
farm building
electrical installation
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive ant-colony algorithm for semantic query routing
Autorzy:
Gómez Santillán, C.
Cruz Reyes, L.
Schaeffer, E.
Meza, E.
Rivera Zarate, G.
Powiązania:
https://bibliotekanauki.pl/articles/384885.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
parameter tuning
search algorithm
peer-to-peer
adaptive algorithm
local environment
ant colony algorithms
Opis:
The most prevalent P2P application today is file sha ring, both among scientific users and the general public. Afundamental process in file sharing systems is the search mechanism. The unstructured nature of real-world largescale complex systems poses a challenge to the search me thods, because global routing and directory services are impractical to implement. This paper presents a new antcolony algorithm, Adaptive Neighboring-Ant Search (AdaNAS), for the semantic query routing problem (SQRP) in a P2P network. The proposed algorithm incor porates an adaptive control parameter tuning technique for runtime estimation of the time-to-live (TTL) of the ants. AdaNAS uses three strategies that take advantage of the local environment: learning, characterization, and explo ration. Two classical learning rules are used to gain ex perience on past performance using three new learning functions based on the distance traveled and the resources found by the ants. The experimental results show that the AdaNAS algorithm outperforms the NAS algorithm where the TTLvalue is not tuned at runtime.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 1; 85-94
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotifer trophic state indices as ecosystem indicators in brackish coastal waters
Autorzy:
Gutkowska, A.
Paturej, E.
Kowalska, E.
Powiązania:
https://bibliotekanauki.pl/articles/49197.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
rotifer
trophic status
chemical parameter
physical parameter
salinity
brackish water
coastal water
indicator species
zooplankton
Vistula Lagoon
environment condition
biological monitoring
Źródło:
Oceanologia; 2013, 55, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of climate change on the Curonian Lagoon water balance components, salinity and water temperature in the 21st century
Autorzy:
Jakimavicius, D.
Kriauciuniene, J.
Sarauskiene, D.
Powiązania:
https://bibliotekanauki.pl/articles/47688.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
climate change
Curonian Lagoon
shallow water
water balance
water temperature
water salinity
coastal environment
meteorological parameter
Źródło:
Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Summer distribution patterns of Trichodesmium spp. in the Changjiang (Yangtze River) Estuary and adjacent East China Sea shelf
Autorzy:
Jiang, Z.
Chen, J.
Zhou, F.
Zhai, H.
Zhang, D.
Yan, X.
Powiązania:
https://bibliotekanauki.pl/articles/47907.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Trichodesmium
Yangtze River
estuary
China Sea
trichome
biogeochemistry
environment parameter
sea surface temperature
salinity
Opis:
To examine the distribution of Trichodesmium relative to physicochemical factors during summer in the Changjiang (Yangtze River) Estuary and adjacent East China Sea shelf, three cruises were conducted separately in June 2009, July 2011, and August 2009. Trichodesmium species found were T. thiebautii, T. erythraeum, and T. hildebrandtii. The population was dominated by T. thiebautii, which accounted for >85% of the samples found. Most of them were free trichomes. Colonial forms were rarely observed (approximately 10% of our samples), occurring only in offshore waters. The depth integrated abundances of Trichodesmium were 308 × 103, 1709 × 103, and 3448 × 103 trichomes m−2 in June, July, and August, respectively. Trichodesmium was distributed abundantly in the southern or southeastern part of our study area, where nutrients were low and light penetration, temperature, and salinity were high, which were influenced by the Taiwan Warm Current (TWC) and Kuroshio. Trichodesmium was found in low abundance in inshore, eutrophic, low-salinity waters, which were mainly controlled by the Changjiang Diluted Water (CDW) and coastal current. These results suggest that spatiotemporal changes in the summer Trichodesmium distribution correlate highly with the variations in physicochemical properties that are primarily controlled by the TWC, Kuroshio, and CDW. The summer N2 fixation rate of Trichodesmium was estimated at 12.3 μmol N m−2 d−1 in our study area, contributing >50% of biological N2 fixation.
Źródło:
Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatio-temporal variations in sulfur-oxidizing and sulfate-reducing bacterial activities during upwelling, off South-West coast of India
Autorzy:
Kamaleson, A.S.
Gonsalves, M.-J.
Kumar, S.
Jineesh, V.K.
LokaBharathi, P.A.
Powiązania:
https://bibliotekanauki.pl/articles/47551.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
spatio-temporal variability
sulphate reduction
sulphur oxidation
bacterial activity
microbial degradation
environment parameter
upwelling
Arabian Sea
India
coastal water
Źródło:
Oceanologia; 2019, 61, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of morphometric leaf traits in small-leaved linden [Tilia cordata Mill.] under the influence of air pollution
Autorzy:
Kosiba, P
Powiązania:
https://bibliotekanauki.pl/articles/59075.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
bioindicator
morphometry
biometric analysis
air pollution
metal content
Tilia cordata
variability
botany
leaf parameter
leaf
small-leaved linden
pollution level
environment pollution
Opis:
The study concerns the ecological responses of Tilia cordata Mill. to pollution and describes the advantages of estimating of the degree of environmental pollution. The aim was, to find out whether the degree of pollution conforms to the contents of the investigated elements in leaves, the assessment of variability of morphometric leaf traits and the cationic equilibrium values. The study has shown a statistically significant differentiation between the analysed sites in respect of dust fall, concentrations of elements in soils and leaves, morphometric traits of leaves and the cationic equilibrium. The hierarchical tree plot of cluster analysis qualified the sites as polluted and non-polluted. In polluted sites the contents of metals in leaves were significantly higher and the cationic equilibrium in leaves was disturbed. The surface, width and asymmetry of leaves, and also the variability of these measures were higher in polluted sites. In sites, which are not directly affected by pollution the cationic equilibrium is close to the const. value, whereas leaf traits have shown the lowest values and a considerably lower variability. The investigations show that leaf traits and cationic equilibrium correspond to the level of pollution and can be used as a tool for evaluation of the environment status.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and fate of polycyclic aromatic hydrocarbons (PAHs) in recent sediments from the Gulf of Gdańsk (SE Baltic)
Autorzy:
Lubecki, L.
Kowalewska, G.
Powiązania:
https://bibliotekanauki.pl/articles/48378.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic Sea
Gdansk Gulf
Vistula River
anthropogenic stress
distribution
environment parameter
hydrocarbon
marine area
organic carbon
pollution
polycyclic aromatic hydrocarbon
sediment
water
Źródło:
Oceanologia; 2010, 52, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of physicochemical parameters on zooplankton in the brackish, coastal Vistula Lagoon
Autorzy:
Paturej, E.
Gutkowska, A.
Koszalka, J.
Bowszys, M.
Powiązania:
https://bibliotekanauki.pl/articles/48536.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
physicochemical parameter
zooplankton
brackish water
Vistula Lagoon
environment condition
canonical correspondence analysis
temperature
salinity gradient
Opis:
This paper analyzes whether physicochemical properties significantly influence the occurrence of zooplankton in a brackish reservoir. The studies were carried out on the Vistula Lagoon in August and September from 2006 to 2009 at 32 research sites. The environmental conditions in the Vistula Lagoon varied widely. At the time of the investigation, 17 species of rotifers, six species of Cladocera, and ten species of Copepoda were noted, and the total density of plankton fauna ranged from 145 to 765 ind. dm3. Statistical analysis demonstrated a significant correlation between the occurrence of some zooplankton species and certain environmental parameters, whereas the sampling sites were grouped according to study years. The zooplankton systems recorded at the research sites in 2006 constitute the most disparate group. Thus, it can be concluded that physicochemical properties might significantly impact both individual species (depending on their environmental demands) and entire zooplankton clusters.
Źródło:
Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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