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Tytuł:
An Enhanced Approach for Image Edge Detection Using Histogram Equalization (BBHE) and Bacterial Foraging Optimization (BFO)
Autorzy:
Kumar, Praveen
Jindal, Tanvi
Raj, Balwinder
Powiązania:
https://bibliotekanauki.pl/articles/2200715.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
edge detection
bacterial foraging optimization
BBHE
images processing
graphics
Opis:
The Edge detection is a customarily task. Edge detection is the main task to perform as it gives clear information about the images. It is a tremendous device in photograph processing gadgets and computer imaginative and prescient. Previous research has been done on moving window approach and genetic algorithms. In this research paper new technique, Bacterial Foraging Optimization (BFO) is applied which is galvanized through the social foraging conduct of Escherichia coli (E.coli). The Bacterial Foraging Optimization (BFO) has been practice by analysts for clarifying real world optimization problems arising in different areas of engineering and application domains, due to its efficiency. The Brightness preserving bi-histogram equalization (BHEE) is another technique that is used for edge enhancement. The BFO is applied on the low level characteristics on the images to find the pixels of natural images and the values of F-measures, recall(r) and precision (p) are calculated and compared with the previous technique. The enhancement technique i.e. BBHE is carried out to improve the information about the pictures.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 4; 875--880
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tidewater glaciers as feeding spots for the Black-legged Kittiwake (Rissa tridactyla): A citizen science approach
Autorzy:
Dragańska-Deja, Katarzyna
Błaszczyk, Małgorzata
Deja, Kajetan
Węsławski, Jan Marcin
Rodak, Jan
Powiązania:
https://bibliotekanauki.pl/articles/2041837.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
glacial bays
seabirds
gulls
foraging
Źródło:
Polish Polar Research; 2020, 41, 1; 69-93
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of temperature on the development of Thrips nigropilosus Uzel (Thysanoptera: Thripidae) on Mentha x piperita L. and the impact of pest on the host plant
Autorzy:
Kucharczyk, H.
Kucharczyk, M.
Winiarczyk, K.
Lubiarz, M.
Tchórzewska, D.
Powiązania:
https://bibliotekanauki.pl/articles/12682489.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant cultivation
greenhouse cultivation
mint
Mentha piperita
herbal plant
host plant
plant morphology
plant anatomy
morphological change
anatomical change
pest
plant pest
Thysanoptera
Thripidae
Thrips nigropilosus
foraging
life cycle
temperature effect
Opis:
Thrips nigropilosus Uzel is a polyphagous species occurring mainly in temperate climates. Its life cycle depends on photoperiodic and temperature conditions. T. nigropilosus feeds on different plant species, but it is considered one of the most serious pests of pyrethrum plants causing serious economic problems. However, several additional agricultural host plants have been affected by T. nigropilosus, including spearmint, cucumber, and lettuce, indicating that this insect can significantly widen its habitats and occurs especially frequently in greenhouses. We report that T. nigropilosus massively attacked Mentha × piperita L. cultivated in greenhouses in central Poland and destroyed the entire mint crops within a short time. The study provided insight into the harmful effect of the thrips and showed that the length of the thrips developmental cycle was reduced with temperature increases from 18 to 26.6°C. The lower threshold temperatures were 13.7, 10.2, 5.0, and 10.1 for eggs, larvae, pupae, and total development, respectively, and the thermal constant for the same developmental stages was 65.9, 90, 132.5, and 284.9-degree days. Both parameters were estimated by linear regression analysis. During our experiment, T. nigropilosus developed by thelytokous parthenogenesis. The morphological and anatomical changes in damaged plants were associated with the fact that the insect began feeding on the lower lamina surface close to the leaf midribs, but no damage to vascular bundles and glandular cells was observed.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 3; 219-233
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The multi-constrained multicast routing improved by hybrid bacteria foraging-particle swarm optimization
Autorzy:
Sahoo, Satya Prakash
Kabat, Manas Ranjan
Powiązania:
https://bibliotekanauki.pl/articles/305674.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
QoS routing
multicasting
bacteria foraging optimization
particle swarm optimization (PSO)
Opis:
To solve multicast routing under multiple constraints, it is required to generate a multicast tree that ranges from a source to the destinations with minimum cost subject to several constraints. In this paper, PSO has been embedded with BFO to improve the convergence speed and avoid premature convergence that will be used for solving QoS multicast routing problem. The algorithm proposed here generates a set of delay compelled links to every destination present in the multicast group. Then the Bacteria Foraging Algorithm (BFA) selects the paths to all the destinations sensibly from the set of least delay paths to construct a multicast tree. The robustness of the algorithm being proposed had been established through the simulation. The efficiency and effectiveness of the algorithm being proposed was validated through the comparison study with other existing meta-heuristic algorithms. It shows that our proposed algorithm IBF-PSO outperforms its competitive algorithms.
Źródło:
Computer Science; 2019, 20 (2); 245-269
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Habitat preference and resource utilization of avifauna in Kuldiha Wildlife Sanctuary, Odisha, India: Role of eco-ethological gradients
Autorzy:
Ghosh, Srinjana
Paria, Santu
Mardaraj, Prakash Chandra
Chakraborty, Susanta Kumar
Powiązania:
https://bibliotekanauki.pl/articles/1177424.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Avifaunal diversity
Conservation
Foraging guilds
Kuldiha Wildlife Sanctuary (KWS)
Tropical deciduous forest
Opis:
The present study has attempted to highlight the avifaunal diversity in two contrasting seasons (pre and post monsoons) from a protected tropical mixed deciduous forest (Kuldiha Wildlife Sanctuary, KWS) in the state of Odisha, India. Through modified line transect method, a total of 107 species of birds belonging to 49 families under 15 orders have been reported. Among them, 12 are winter visitors, 3 are summer visitors, 1 is near threatened and 1 is vulnerable species. Insectivores and frugivores constitute major foraging guilds. Closed canopy forests, forest edges, woodland areas and wetlands provide suitable habitats to all those avifauna. Lower canopy level was found to act as the major microhabitat for several species for meeting major ecobiological attributes of avifauna. The pre-monsoon and monsoon periods have appeared to be the ideal nesting seasons for most of the avian members. Canopy foliage and tree holes were seen to offer the most suitable nesting sites. Significant differences in respect of species richness have been observed among different habitats in different seasons (F5.91 ,p ≤ 0 in premonsoon, F6.53, p ≤ 0 in post monsoon). The highest Shannon Weiner diversity index (H′) was recorded from the forest edge (3.8) during premonsoon and that of lowest in orchard or plantation areas (2.96) during post monsoon. Species Dominance value (D) was observed to be highest both for grassland and orchards and plantation areas (0.06). The field based study attempts to assess avian diversity (qualitative and quantitative) in the light of global conservation programme. Though this area is prone to varying levels of anthropogenic interventions particularly the tourism activities, an overall healthy bird diversity has been found to exist, the knowledge on which is expected to be utilized for the holistic eco-management of forest ecosystem in general and Kuldiha wildlife sanctuary in particular. A number of hypothesis have been proposed in respect of avifaunal habitat selection, diversity and acclimation with wildlife friendly human association for their successful coexistence.
Źródło:
World Scientific News; 2018, 103; 32-64
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aktywność żerowiskowa nietoperzy w różnych fazach rozwojowych drzewostanów sosny zwyczajnej
Foraging activity of bats in Scots pine stands in different growth stages
Autorzy:
Węgiel, A.
Grzywiński, W.
Ciechanowski, M.
Jaros, R.
Kmiecik, A.
Kmiecik, P.
Wegiel, J.
Powiązania:
https://bibliotekanauki.pl/articles/989345.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
sosna zwyczajna
Pinus sylvestris
fazy rozwojowe
zreby
uprawy sosnowe
drzewostany sredniowiekowe
drzewostany dojrzale
nietoperze
Chiroptera
roznorodnosc gatunkowa
aktywnosc zerowania
chiroptera
foraging activity
habitat use
forest management
pinus sylvestris
western poland
Opis:
Scots pine (Pinus sylvestris L.) is economically the most important tree species in Polish forestry. Congeneric pine stands have a quite low level of biodiversity, and logging with clear sites may even cause their further decline. It is very important to discover the influence of clear−cuttings in managed pine stands on different groups of organisms. One of them are bats which play an important role in forest biotopes as a regulator of insect pests. The aim of this paper is to compare the foraging activity of bats in pine stands of different stages of growth. The study was carried out in three complexes of pine forests in western Poland: Drawska Forest, Notecka Forest and Dolnośląskie Forests. Four types of growth phases were studied: clear−cut sites (Z), young plantations in the age 2−5 years (U), 41−60−years−old stands (III) and mature stands in the age over 80 years (V). The study of the foraging bat activity was conducted with broadband ultrasound detectors Pettersson D−1000X within 3 hours after sunset in summer periods of 2013 and 2014. The recordings were analyzed with BatSound software. Total 19 180 bat passes were recorded on all 120 sampling plots. 11 bat species: Nyctalus noctula, Pipistrellus pipistrellus, Eptesicus serotinus, P. nathusii, Myotis myotis, P. pygmaeus, M. nattereri, Barbastella barbastellus, N. leisleri, E. nilssonii and Vespertilio murinus and four groups of species: NEV (Nyctalus, Eptesicus, Vespertilio), MSP (Myotis), PSP (Pipistrellus), and PLE (Plecotus) were recognized (tab. 1). The dominant was common noctule N. noctula (71.5%). The highest foraging activity of bats was recorded in open areas: clear sites and plantations (fig. 1), next in mature stands and middle−aged stands. The obtained results suggest that bats can adapt to a mosaic of habitats created by clear−cutting harvesting system in managed pine forests.
Źródło:
Sylwan; 2016, 160, 09; 767-776
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Żerowanie konika polskiego w strefie brzegowej siedlisk leśnych o różnym zwarciu koron
Browsing of the Polish koniks within the forest edge of habitats with various canopy closure
Autorzy:
Klich, D.
Grudzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/989672.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Roztoczanski Park Narodowy
koniki polskie
zerowanie
ekotony
ekoton las-pastwisko
siedliska lesne
bor mieszany
ols porzeczkowy
bor bagienny
zgryzanie
intensywnosc zerowania
horse
foraging
ecotone
browse
shrubs
Opis:
The study assessed the intensity of Polish konik browsing in mixed coniferous forest (BM), alder swamp forest (OL) and pine swamp forest (BB) of different canopy closure and shrub or ground vegetation cover. The study was conducted in Polish konik enclosure situated in the Roztoczański National Park (eastern Poland) in August 2011. We examined mean browsing intensity and the tendency of horses to browse along 100 m zone from the pasture. The field study was conducted at three parallel transects set in 40 m intervals in each analysed forest habitat, starting at the forest edge and oriented towards the forest interior. Along the transects, 5×2 m plots were established in 10 m intervals. Within each plot the untouched current twigs and twigs browsed by koniks (up to 2 m above the ground) were counted separately, and categorized by a tree and shrub species. For each species 30 samples of complete twigs and twigs browsed by koniks were collected. Twigs were dried by 72 h in 60°C and weighted with accuracy up to 0.001 g. We estimated the dry mass of shoots available within the plot and taken by horses. Generally, koniks were using each studied forest stand proportionally to the mean browse mass. A factorial regression indicates that regardless to the available mass in a given forest stand, horses foraging intensity towards the forest interior was varying significantly. Koniks entered further into the forest the more willingly the more open the forest canopy was. Openness of the forest habitat could indirectly influence the pattern of forest penetration by horses, because of the grazed ground vegetation there.
Źródło:
Sylwan; 2016, 160, 01; 49-56
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena aktywności żerowej Cervus elaphus na zrewitalizowanych łąkach śródleśnych na podstawie analizy intensywności zgryzania runi
Evaluation of Cervus elaphus foraging activity on revitalised mid-forest meadows based on analysis of sward browsing intensity
Autorzy:
Daszkiewicz, J.
Goliński, P.
Powiązania:
https://bibliotekanauki.pl/articles/372373.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
jeleń europejski
łąki śródleśne
renowacja runi
aktywność żerowa
intensywność zgryzania runi
red deer
mid-forest meadows
sward renovation
foraging activity
sward browsing intensity
Opis:
Celem niniejszej pracy jest ocena aktywności żerowej jelenia europejskiego na łąkach śródleśnych poddanych renowacji z wykorzystaniem różnych metod. Badania przeprowadzone na obiektach doświadczalnych wykazały, że zdecydowana większość aktywności żerowej zwierząt miała miejsce na powierzchniach odnowionych przy pomocy metody pełnej uprawy połączonej z wysiewem specjalistycznych mieszanek nasiennych. Stosunkowo niewielki efekt dało zastosowanie metody podsiewu. Żerowa-nie na obiektach kontrolnych miało charakter incydentalny, co pozwala wnioskować, że ruń tych powierzchni łąk nie spełniała wymagań pokarmowych jelenia europejskiego.
Aim of this study is evaluation of red deer foraging activity on renovated mid-forest meadows using different methods. Research, carried out on experimental sites, showed, that most of grazing activity of animals falls on areas renovated by full tillage method combined with sowing of specialised seed mixtures. Relative low effect occurs by using of oversowing method. Foraging activity on control areas was very low, this allow to conclude that sward of this mid-forest meadows didn’t fulfil nutritional needs of red deer.
Źródło:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2015, 158 (38); 66-75
1895-7323
Pojawia się w:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie sezonowe składu pokarmu sarny europejskiej na terenie Żytomierskiego Polesia Ukrainy
The diet of the roe deer (Capreolus capreolus) in the forest ecosystems of Zhytomirske Polesie of the Ukraine
Autorzy:
Krasnov, V.
Shelest, Z.
Boiko, S.
Gulik, I.
Sieniawski, W.
Powiązania:
https://bibliotekanauki.pl/articles/1310939.pdf
Data publikacji:
2015
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Ukraina
Polesie Zytomierskie
fauna
sarna europejska
Capreolus capreolus
sklad pokarmu
zmiany sezonowe
foraging ecology
stomach content analysis
diet components
Opis:
The botanical composition of the European roe deer diet in the radioactively contaminated forest ecosystems of Zhytomirske Polesie of the Ukraine was investigated. Deer were caught monthly over a two–year period on three plots in forest habitats typical for Zhytomirske Polesie (fresh and moist mixed coniferous forests and mixed broadleaved forests). An analysis of the stomach contents of hunted deer showed that they consumed leafy as well as leafless stems, grasses, fruits and mushrooms depending on the season and availability of forest plants. Each season was characterized by one major dietary component. In the spring, the main component of the deer diet was the stems of woody plants. 44 species of vascular plants (3% of the natural flora of the region) were identified in the roe deer diet including 41 species of Magnoliophyta, of which 34 species of Magnoliopsida and 7 species of Liliopsida, 2 species of Polipodiophyta and one species of Pinophyta. Species such as aspen (Populus tremula), oak (Quercus robur), blackberry (Rubus nessensis) and bilberry (Vaccinium myrtillus) were consumed year-round.
Źródło:
Leśne Prace Badawcze; 2015, 76, 2; 184-190
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flowering, pollen characteristics and insect foraging on Campanula bononiensis (Campanulaceae), a protected species in Poland
Kwitnienie, cechy pyłku oraz owady wizytujące kwiaty chronionego gatunku Campanula bononiensis (Campanulaceae)
Autorzy:
Denisow, B.
Wrzesien, M.
Bozek, M.
Jezak, A.
Strzalkowska-Abramek, M.
Powiązania:
https://bibliotekanauki.pl/articles/27174.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
flowering
pollen
quantity
population size
pollen viability
grassland
insect foraging
Campanula bononiensis
Campanulaceae
protected species
Polska
Opis:
This study investigated the floral biology and pollen quantity and quality of Campanula bononiensis L. (Campanulaceae), a protected species in Poland. Observations and measurements were made during the years 2007–2009 in natural phytocoenoses from the Festuco-Brometea class situated within the Lublin area, SE Poland. A considerable decrease (approx. 87%) in population density was observed. Significant variations both in the amount of pollen (18.5%–34.8 % of pollen in the total anther dry weight, i.e. 0.5–1.5 mg per 10 anthers) and in pollen viability (38.8–97.0%) were noted. Both a low amount of pollen and low pollen viability may reduce the reproductive success of individuals. The most frequent visiting insects were bees (Apoidea), including solitary bees 45.7%, honeybees 20.4%, and bumblebees 11.4%. Dipterans, coleopterans (weevils), lepidopterans and ants were also recorded, implying a strong impact of C. bononiensis on insect biodiversity within grasslands.
W pracy przedstawiono wyniki badań dotyczą- ce aspektów kwitnienia, cech ilościowych i jakościowych pyłku Campanula bononiensis L. (Campanulaceae), gatunku objętego w Polsce ustawową ochrony. Obserwacje prowadzono latach 2007–2009, w naturalnej fitocenozie z klasy Festuco-Brometea zlokalizowanej w Lublinie. Zanotowano znaczny, ok. 87% spadek zagęszczenia populacji. Poza procesami sukcesyjnymi, prowadzącymi do zarastania murawy, zanikanie populacji C. bononiensis może być związane z wewn ętrznymi czynnikami biologicznymi, np. ilością i jakością wytwarzanego pyłku. W latach badań zanotowano znaczne wahania w ilości produkowanego pyłku (18.5%–34.8 % suchej masy pylników, tj. 0.5–1.5 mg z 10 pylników) oraz istotne zróżnicowanie jego żywotno ści (38.8-97.0%). Najczęściej obserwowanymi owadami wizytuj ącymi kwiaty były owady pszczołowate (Apoidea). Pszczoły samotnice stanowiły 45.7% ogólnej liczebno ści owadów, 20.4% wyniósł udział pszczoły miodnej, a 11.4% stanowiły różne gatunki z rodzaju Bombus. Obserwowano również muchówki, chrząszcze – ryjkowce, motyle oraz mrówki, co świadczy o dużym wpływie C. bononiensis na bioróżnorodność owadów w obrębie muraw ciepłolubnych.
Źródło:
Acta Agrobotanica; 2014, 67, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WTHD minimisation in hybrid multilevel inverter using biogeographical based optimisation
Autorzy:
Kavitha, R.
Thottungal, R.
Powiązania:
https://bibliotekanauki.pl/articles/141212.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biogeographical based optimisation
BBO
genetic algorithm
GA
bacterial foraging algorithm
BFA
weighted total harmonics distortion
WTHD
optimal minimisation of total harmonic
OMTHD
selective harmonic elimination
SHE
Opis:
Harmonic minimisation in hybrid cascaded multilevel inverter involves complex nonlinear transcendental equation with multiple solutions. Hybrid cascaded multilevel can be implemented using reduced switch count when compared to traditional cascaded multilevel inverter topology. In this paper Biogeographical Based Optimisation (BBO) technique is applied to Hybrid multilevel inverter to determine the optimum switching angles with weighted total harmonic distortion (WTHD) as the objective function. Optimisation based on WTHD combines the advantage of both OMTHD (Optimal Minimisation of Total Harmonic Distortion) and SHE (Selective Harmonic Elimination) PWM. WTHD optimisation has the benefit of eliminating the specific lower order harmonics as in SHEPWM and minimisation of THD as in OMTHD. The simulation and experimental results for a 7 level multilevel inverter were presented. The results indicate that WTHD optimization provides both elimination of lower order harmonics and minimisation of Total Harmonic Distortion when compared to conventional OMTHD and SHE PWM. Experimental prototype of a seven level hybrid cascaded multilevel inverter is implemented to verify the simulation results.
Źródło:
Archives of Electrical Engineering; 2014, 63, 2; 187-196
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolutionary computing approaches to optimum design of fuzzy logic controller for a flexible robot system
Autorzy:
Subudhi, B.
Ranasingh, S.
Powiązania:
https://bibliotekanauki.pl/articles/230107.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flexible manipulator
fuzzy logic
genetic algorithm
bacteria foraging optimization
tip position tracking
Opis:
This paper presents the design of a Fuzzy Logic Controller (FLC) whose parameters are optimized by using Genetic Algorithm (GA) and Bacteria Foraging Optimization (BFO) for tip position control of a single link flexible manipulator. The proposed FLC is designed by minimizing the fitness function, which is defined as a function of tip position error, through GA and BFO optimization algorithms achieving perfect tip position tracking of the single link flexible manipulator. Then the tip position responses obtained by using both the above controllers are compared to suggest the best controller for the tip position tracking.
Źródło:
Archives of Control Sciences; 2013, 23, 4; 395-412
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust design of power system stabilizer using bacterial foraging algorithm
Autorzy:
Abdul Hameed, K.
Palani, S.
Powiązania:
https://bibliotekanauki.pl/articles/141194.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bacterial foraging algorithm
power system stabilizer
power system stability
Opis:
In this paper, a novel bacterial foraging algorithm (BFA) based approach for robust and optimal design of PID controller connected to power system stabilizer (PSS) is proposed for damping low frequency power oscillations of a single machine infinite bus bar (SMIB) power system. This paper attempts to optimize three parameters (Kp, Ki, Kd) of PID-PSS based on foraging behaviour of Escherichia coli bacteria in human intestine. The problem of robustly selecting the parameters of the power system stabilizer is converted to an optimization problem which is solved by a bacterial foraging algorithm with a carefully selected objective function. The eigenvalue analysis and the simulation results obtained for internal and external disturbances for a wide range of operating conditions show the effectiveness and robustness of the proposed BFAPSS. Further, the time domain simulation results when compared with those obtained using conventional PSS and Genetic Algorithm (GA) based PSS show the superiority of the proposed design.
Źródło:
Archives of Electrical Engineering; 2013, 62, 1; 141-152
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wild food plants used in the villages of the Lake Vrana Nature Park (northern Dalmatia, Croatia)
Autorzy:
Luczaj, L.
Fressel, N.
Perkovic, S.
Powiązania:
https://bibliotekanauki.pl/articles/58034.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
wild plant
edible plant
village
ethnobotany
wild vegetable
foraging
ethnomycology
Lake Vrana Nature Park
Dalmatia
Croatia
Opis:
Croatia is a country of diverse plant use traditions, which are still insufficiently documented. The aim of this study was to document local traditions of using wild food plants around Lake Vrana (northern Dalmatia, Zadar region). We interviewed 43 inhabitants of six traditional villages north of Lake Vrana. On average 12 species were listed, which in total produced an inventory of 55 food plants and 3 fungi taxa. Wild vegetables were most widely collected, particularly by older women who gathered the plants mainly when herding their flocks of sheep. Wild fruits and mushrooms were rarely collected. The former used to be an important supplementary food for children, or for everyone during times of food shortage, and the latter were relatively rare due to the dry climate and shortage of woods. The most commonly collected plants are wild vegetables: Cichorium intybus, Foeniculum vulgare, Sonchus oleraceus, Asparagus acutifolius, Papaver rhoeas, Rumex pulcher, Daucus carota, Allium ampeloprasum and Silene latifolia.
Źródło:
Acta Societatis Botanicorum Poloniae; 2013, 82, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dental microwear texture analysis of the Mio-Pliocene hyaenids from Langebaanweg, South Africa
Autorzy:
Stynder, D.D.
Ungar, P.S.
Scott, J.R.
Schubert, B.W.
Powiązania:
https://bibliotekanauki.pl/articles/23002.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
dental microwear texture
Mio-Pliocene
Hyaenidae
Langebaanweg
South Africa
Mammalia
durophagy
diet
foraging strategy
Hyaenictitherium namaquensis Ikelohyaena abronia
Chasmaporthetes australis
Hyaenictis hendeyi
Crocuta crocuta
Acinonyx jubatus
Panthera leo
paleontology
hyaenid species
Opis:
Hyaenids reached their peak diversity during the Mio−Pliocene, when an array of carnivorous species emerged alongside dwindling civet−like and mongoose−like insectivorous/omnivorous taxa. Significantly, bone−cracking morphological adaptations were poorly developed in these newly−emerged species. This, their general canid−like morphology, and the absence/rarity of canids in Eurasia and Africa at the time, has led researchers to hypothesise that these carnivorous Mio−Pliocene hyaenas were ecological vicars to modern canids. To shed further light on their diets and foraging strategies, we examine and compare the dental microwear textures of Hyaenictitherium namaquensis, Ikelohyaena abronia, Chasmaporthetes australis, and Hyaenictis hendeyi from the South African Mio−Pliocene site of Langebaanweg with those of the extant feliforms Crocuta crocuta, Acinonyx jubatus, and Panthera leo (caniforms are not included because homologous wear facets are not directly comparable between the suborders). Sample sizes for individual fossil species are small, which limits confidence in assessments of variation between the extinct taxa; however, these Mio−Pliocene hyaenas exhibit surface complexity and textural fill volume values that are considerably lower than those exhibited by the living hyaena, Crocuta crocuta. Dental microwear texture analysis thus supports interpretations of craniodental evidence suggesting low bone consumption in carnivorous Mio−Pliocene hyaenas.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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