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Wyświetlanie 1-15 z 1227
Tytuł:
"Red book" of the Hungarian landscapes atlas of the threaths on the natural functioning of the 229 Hungarian microregions
Autorzy:
Csorba, P.
Szabo, J.
Bodnar, R.
Szilagyi, Z.
Szabo, G.
Szabo, S.
Novak, T.
Fazekas, I.
Powiązania:
https://bibliotekanauki.pl/articles/87960.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
indexes for landscape functioning
landscape fragmentation
natural hazards
land use change
Hungary
Opis:
For the good established landscape planning landscape protection and landscape management actions have to take into consideration the actual conditions of the landscape elements. Earlier we dealt with the stability of the landscapes (Kerényi, Csorba, 1996), recently started to investigate the most important factors, which are endangers the proper functioning of the landscapes. Results are calculated for 229 microregions of the country, which are elements of the official landscape hierarchy of Hungary described in the Cadastral of Microregions of Hungary. The average size of the microregions are 100-500 km2. There are certain factors among which some have already elaborated, and others are being worked on yet. Degree of ecological fragmentation of the microregions by roads, railway lines and settlements was determined during the last year. In the case of large settlements the extent of inner parts, traffic intensities of the roads was taken into account, while in the case of railroads it was taken into consideration whether railway lines are single or double tracked. Results were purified using a weighting, where the location of the protected natural areas compared to the situation of the given settlement, roads or railroads was taken into consideration. In the calculations it was taken into account as well that the agglomeration processes of the large settlements may restrict the ecological gates and corridors of the migration of plant and animal species. From the series of maps on natural threats on microregional level, the map of the hazards of drought is presented first. The map gives a definite answer to the question, in which microregions is profitable to establish irrigation systems; and how high is the uncertainty of the rate of their utilization. Global warming, however, may modulate the map resented here remarkably in the next decades. Microregions that have been classified into transition categories with moderate or medium level of drought hazard may fall into categories of serious hazard of drought in the future. A synthesizing map has been completed by summing the seven datasets of the indicator group of natural hazards and the weighting of the subsets. Landscape planning is strongly affected by tendencies of macro economy on the present land use structure. EU agricultural policies have just started to affect strongly on Hungarian land use structure, therefore attempts have been made in order to forecast their impacts. Present Hungarian land use structure has been compared to priorities of the EU. Prospective shifts in land use structure have been determined for the 35 regions of Hungary. According to the 8-10 factors mentioned above, we shall have a detailed database to evaluate the microregions of Hungary in order to characterize the most threatened landscapes, and the most dangerous impacts on the landscape functioning.
Źródło:
Prace Komisji Krajobrazu Kulturowego; 2008, 8; 43-60
1896-1460
2391-5293
Pojawia się w:
Prace Komisji Krajobrazu Kulturowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
$[Ni(en)(H_2O)_4][SO_4] \cdot 2H_2O$ - an S = 1 Molecular Magnet with Easy-Plane Anisotropy
Autorzy:
Tarasenko, R.
Orendáčová, A.
Tibenská, K.
Potočňák, I.
Kajňaková, M.
Vlček, A.
Orendáč, M.
Feher, A.
Powiązania:
https://bibliotekanauki.pl/articles/1813818.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Et
75.30.Gw
75.40.Cx
Opis:
Structural analysis of $[Ni(en)(H_2O)_4][SO_4] \cdot 2H_2O$ was performed and it suggests that the crystal field should play a dominant role in the magnetic properties of the system. This conjecture coincides well with the specific heat and susceptibility behaviour. The analysis confirmed that the compound can be treated as a spin 1 single molecule magnet with nonmagnetic ground state introduced by easy-plane single-ion anisotropy D/$k_B$≈11 K and neglecting in-plane anisotropy E/D <0.1.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 481-484
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
$BiFeO_3$ Crystal Structure at Low Temperatures
Autorzy:
Palewicz, A.
Sosnowska, I.
Przeniosło, R.
Hewat, A.
Powiązania:
https://bibliotekanauki.pl/articles/1538869.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.fm
61.66.Fn
75.50.Ee
77.84.Bw
Opis:
The crystal and magnetic structure of $BiFeO_3$ have been studied with the use of high resolution neutron diffraction between 5 K and 300 K. The atomic coordinates in $BiFeO_3$ are almost unchanged between 5 K and 300 K.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 296-301
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D face reconstruction with region based best fit blending using mobile phone for virtual reality based social media
Autorzy:
Anbarjafari, G.
Haamer, R. E.
Lüsi, I.
Tikk, T.
Valgma, L.
Powiązania:
https://bibliotekanauki.pl/articles/202117.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
facial modeling
morphing
stretching
computer vision
similarity calculation
deformable model
3D faces
virtual reality
blendshape
modelowanie twarzy
morfing
rozciąganie
wizja komputerowa
model odkształcalny
twarze 3D
wirtualna rzeczywistość
Opis:
The use of virtual reality (VR) has been exponentially increasing and due to that many researchers have started to work on developing new VR based social media. For this purpose it is important to have an avatar of the user which look like them to be easily generated by the devices which are accessible, such as mobile phones. In this paper, we propose a novel method of recreating a 3D human face model captured with a phone camera image or video data. The method focuses more on model shape than texture in order to make the face recognizable. We detect 68 facial feature points and use them to separate a face into four regions. For each area the best fitting models are found and are further morphed combined to find the best fitting models for each area. These are then combined and further morphed in order to restore the original facial proportions. We also present a method of texturing the resulting model, where the aforementioned feature points are used to generate a texture for the resulting model.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 125-132
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A breakthrough in the efficiency of contact DNA insecticides: rapid high mortality rates in the sap-sucking insects Dynaspidiotus britannicus Comstock and Unaspis euonymi Newstead
Autorzy:
Gal`chinsky, N.
Useinov, R.
Yatskova, E.
Laikova, K.
Novikov, I.
Gorlov, M.
Trikoz, N.
Sharmagiy, A.
Plugatar, Y.
Oberemok, V.
Powiązania:
https://bibliotekanauki.pl/articles/2082776.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antisense oligonucleotides
DNA insecticides
insect pest control
sap-sucking
insects
28S ribosomal RNA
Opis:
In this short communication describing experiments carried out on the larvae of two insects, Unaspis euonymi Comstock (feeding on Euonymus japonicus Thunb.) and Dynaspidiotus britannicus Newstead (feeding on Laurus nobilis L.), we evaluate for the first time the efficiency of using DNA insecticides in the control of sap-sucking insects, including armored scale insects. Over a period of 10 days, high insect mortality was detected in both U. euonymi and D. britannicus, accompanied by a significant decrease in the concentration of target RNAs. At the same time, no visible changes were observed when the leaves of the host plants were subjected to treatment with DNA insecticides for one month. The results show the high efficiency of DNA insecticides used against hemipteran insect pests. It is noteworthy that the high efficiency of DNA insecticides and their low cost in comparison with RNA preparations provides a safe and extremely promising potential vehicle for the control of sap-sucking insects.
Źródło:
Journal of Plant Protection Research; 2020, 60, 2; 220-223
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A COLREGs-compliant decision support tool to prevent collisions at sea
Autorzy:
Martelli, M.
Žuškin, S.
Zaccone, R.
Rudan, I.
Powiązania:
https://bibliotekanauki.pl/articles/24201449.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
analysis of ship collision
collision avoidance
collision avoidance decision making
collision avoidance system
anti-collision maneuvering
autonomous control unit
autonomous ship
autonomous navigation system
Opis:
Groundings and collisions still represent the highest percentage of marine accidents despite the current attention on Maritime Education and Training and the improvement of sensor capability. Most of the time, a collision is caused by a human error with consequences ranging from moderate to severe, with a substantial impact on both environment and life safeguarded at sea. In this paper, a brief statistical data regarding human element as a root cause of marine incidents together with collision regulations misunderstanding is presented as a background chapter. Furthermore, the present work discusses a decision support system architecture to suggest an appropriate action when the risk of a potential collision is detected. The proposed architecture system is based on various modules integrated with proper sensor input data regarding the surrounding navigation area. As a result, the tool can support the Officers of Watch in the decision-making process providing an early suggestion in compliance with the COLlision REGulations. The proposed system is intended to be used onboard independently from the degree of automation of the ship, and it is based on AIS, which is mandatory, making it widely applicable. The proper use of the system can considerably reduce the number of collisions, as demonstrated by the obtained results.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 347--353
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative analysis of plant growth- -promoting traits of Pseudomonas and Bacillus strains isolated from Lolium perenne rhizospheric soil in Vojvodina (Serbia) and their effect on the plant yield
Autorzy:
Stamenov, D.R.
Hajnal-Jafari, Y.I.
Najvirt, B.
Anđelković, S.
Tomić, J.
Đurić, S.S.
Powiązania:
https://bibliotekanauki.pl/articles/12713377.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
The objective of this work was to do a comparative study of Pseudomonas and Bacillus isolates for their plant growth-promoting (PGP) potential, monitoring the impact of selected isolates on the yield of English ryegrass (Lolium perenne). Isolation, physiological and biochemical characterization, in vitro assay of enzymatic and plant-growth promoting activities of isolates were done. Pseudomonas isolates have been shown to have the ability to use different sources of carbon, to live in the condition of low pH as well as temperature and to produce siderophore. On the other hand, Bacillus isolates have the ability to solubilize phosphate, to produce a greater amount of indol-3-acetic acid (IAA) than Pseudomonas isolates and have an inhibitory effect on the growth of phytopathogenic fungi. In other investigated traits, isolates were similar. The use of Pseudomonas sp. P12 and Bacillus sp. B1 isolates had a positive effect on the plant mass and total yield, which indicate that the use of these isolates can result in a better yield of forage crops.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 3; 37-45
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison for Grain Size Calculation of Cu-Zn Alloys with Genetic Programming and Neural Networks
Autorzy:
H. Karahan, İ.
Özdemir, R.
Powiązania:
https://bibliotekanauki.pl/articles/1402491.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.05.Mh
81.15.Pq
Opis:
Neural Networks (NN) and Genetic Programming (GP) were used as a new method for formulation of grain size of electrodeposited $Cu_{1-x}Zn_x$ alloys as a function of Zinc and Copper content both electrolyte and the alloy films produced by electrodeposition technique. To predict grain size a great number of different expression models genetic programming and neural network were conducted. Each model differs from the other with their linking function, number of genes, head size, and chromosomes. To generate databases for the new grain size formulations, testing and training sets in total of 134 samples were selected at different Zn and Cu ratios of components. 6 different input parameters were selected and the output parameter was grain size of the electrodeposited Cu-Zn alloys. The testing and training sets consisted of randomly selected 106 and 28 for the proposed models. All results in the models indicated an applicable performance for predicting grain size of the alloys and found reliable. The predicted model showed that all of the input parameters effected on the resulting grain size. The NN and GEP based formulation results are compared with experimental results and found to be quite reliable with a very high correlation (R2 = 0.995 for GEP and 0.999 for NN).
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-427-B-431
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Different Estimation Methods for Hysteresis Modelling
Autorzy:
Jastrzębski, R.
Chwastek, K.
Biondić, I.
Miličević, K.
Powiązania:
https://bibliotekanauki.pl/articles/1030241.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.-d
75.60.Ej
Opis:
The paper focuses on the estimation techniques for a low-dimensional phenomenological model of ferromagnetic hysteresis proposed by the Brazilian research group GRUCAD. The description is expressed with an ordinary differential equation and some auxiliary relationships. It describes both irreversible and reversible magnetization processes and addresses some problems inherent in the well-known Jiles-Atherton model. It is found that the differential evolution method is the most competitive technique for recovery of optimal model parameters.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1228-1231
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Two Methods of Determining Thermal Properties of Footwear
Autorzy:
Kuklane, K.
Holmer, I.
Afanasieva, R.
Powiązania:
https://bibliotekanauki.pl/articles/90826.pdf
Data publikacji:
1999
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
standard
thermal insulation
footwear
thermal foot model
stopy
obuwie
izolacja cieplna
Opis:
The present European Standard for footwear testing (Standard No. EN 344:1992; European Committee for Standardization [CEN], 1992) classifies footwear thermally by a temperature drop inside the footwear during 30 min at defined conditions. Today, other methods for footwear thermal testing are also available. The aim of this study was to compare EN 344:1992 with a thermal foot method. Six boots were tested according to both methods. Additional tests with modified standard tests were also carried out. The methods ranked the footwear in a similar way. However, the test according to standard EN 344:1992 is a pass-or-fail test, whereas data that is gained from the thermal foot method gives more information and allows further use in research and product development. A change of the present standard method is suggested.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1999, 5, 4; 477-484
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A control system based on the DC-DC converter for stand-alone vertical-axis wind turbines
Układ sterowania działający w oparciu o przekształtnik DC-DC dla autonomicznych elektrowni wiatrowych z osią pionową
Autorzy:
Shchur, I. Z.
Turlenko, O. R.
Powiązania:
https://bibliotekanauki.pl/articles/194118.pdf
Data publikacji:
2010
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
turbina wiatrowa
pionowa oś
wirnik turbiny wiatrowej
PMSG
DC-DC przekształtnik
sterowanie optymalne
wind turbine
vertical axis
wind turbine rotor
DC-DC converter
optimal control
Opis:
In this paper the investigation of uncontrollable and adjustable by the boost DC-DC converter systems of autonomous wind turbines are conducted on the basis of computer simulation. To achieve the maximum efficiency of energy transference and conversion at different wind speeds, the optimal combination of regulated and unregulated modes is proposed. The developed control system allows taking off the maximum power from wind without a wind sensor.
W niniejszej pracy są przedstawione wyniki badań układu sterowania autonomicznej elektrowni wiatrowej z osią pionową, który wykorzystuje przekształtnik DC-DC. Badania przeprowadzono za pomocą symulacji komputerowej. Aby osiągnąć maksymalną skuteczność przesyłania i konwersji energii przy różnych prędkościach wiatru zaproponowano optymalną kombinację regulowanych i nieregulowanych trybów pracy. Opracowane sterowanie umożliwia maksymalne wykorzystanie mocy wiatru bez stosowania czujnika prędkości wiatru.
Źródło:
Zeszyty Naukowe. Elektrotechnika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy; 2010, 15; 53-65
0209-0570
Pojawia się w:
Zeszyty Naukowe. Elektrotechnika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A convergent approach for the synthesis of new pyrazolyl bipyridinyl substituted coumarin derivatives as antimicrobials
Autorzy:
Bhila, V. G.
Chovatiya, Y. L.
Patel, C. V.
Giri, R. R.
Brahmbhatt, D. I.
Powiązania:
https://bibliotekanauki.pl/articles/411982.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Coumarin
Bipyridine
Pyrazole
Kröhnke’s reaction
antimicrobial activity
Opis:
Some new 3-[3-(1-phenyl-3-aryl-1H-pyrazol-4-yl)acryloyl]coumarins 3a-f were synthesized (coumarin chalcones) by the condensation of various 3-acetyl coumarins 1 and appropriate 1-phenyl-3-aryl-1H-pyrazole-4-carbaldehyde 2. These coumarin chalcones 3a-f were then employed for the synthesis of pyrazolyl bipyridinyl substituted coumarins 7a-f, 8a-f, and 9a-f under Krohnke’s reaction condition. The characterization of all the synthesized compounds was carried out by elemental analysis, IR, 1H-NMR, 13C-NMR, DEPT-135 and mass spectral analysis. In addition to that, in vitro antimicrobial competency of the title compounds was assessed against selected pathogens. Compounds 3b, 3e, 7b, 8b, 8c and 9b exhibited excellent antimicrobial activity and said to be the most proficient members of the series.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 40; 1-16
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A database supported 3d-geometric model for computer based assessment and volumetric calculations of hard coal deposits in the donets basin; results of a joint Ukrainian-German project
Autorzy:
Juch, D.
Thomsen, A.
Spirina, O.
Karlashenko, I.
Piskovaya, T.
Ryabcev, R.
Powiązania:
https://bibliotekanauki.pl/articles/1204915.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coal deposits
database
computer 3D-modelling
Donets Basin
Opis:
In an attempt to make use of scientific potential for geological evaluation like resource management, a join German-Ukrainian project was carried out during the last four years. The aim of this project was the introduction and application in the Donets Basin of a computer based coal resources assessment method originally developed for the assessment of the German hard coal deposits and was called KVB-model. The combination and adaptation of the old conception of the KVB-model with modern graphic allows for the combination of the 3D structure plans of the seams with different attributes like seam and coal property data (thickness, ash, sulphur, metamorphism, rank), state of exposure (mining zone, prospective), gas content of coal, etc. A further extension of the system may consist of the interpretation of the rocks in addition to the seams already represented in the stratigraphic profile. This would allow the application be used for stratified geological units of any kind.
Źródło:
Polish Geological Institute Special Papers; 2002, 7; 119-124
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A massive freshwater mussel bed (Bivalvia: Unionidae) in a small river in Ukraine
Autorzy:
Protasov, A.
Sylaieva, A.
Morozovska, I.
Lopes-Lima, M.
Sousa, R.
Powiązania:
https://bibliotekanauki.pl/articles/84492.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
freshwater mussel
density
conservation
mussel
Unio tumidus
Unio pictorum
Anodonta anatina
Bivalvia
Unionidae
river
small river
Ukraine
Źródło:
Folia Malacologica; 2015, 23, 4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1227

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