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Wyświetlanie 1-15 z 1056
Tytuł:
The next 150 years begin
Autorzy:
Larson, C. R.
Powiązania:
USNI Proceedings 1996, nr 9, s. 65-69
Data publikacji:
1996
Tematy:
Akademia Marynarki Wojennej (Annapolis, Stany Zjednoczone) reformy planowanie 1996 r.
Marynarka wojenna szkolnictwo wyższe Stany Zjednoczone 1996 r.
Szkolnictwo wyższe wojskowe Stany Zjednoczone 1996 r.
Akademie wojskowe Stany Zjednoczone 1996 r.
Opis:
Perspektywy rozwoju Akademii Sił Morskich Stanów Zjednoczonych.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
A Treatise on Dragonflies (Order: Odonata, Class: Insecta) of rice ecosystems in Eastern India
Autorzy:
Satpathi, C. R.
Powiązania:
https://bibliotekanauki.pl/articles/1178310.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dragonfly
Nymph
biodiversity
conservation
index
rice
threat
weed
wings
Opis:
This study highlights the 75 species of dragonfly fauna associated with rice ecosystems in eastern India out of which 15 species were regular and rest were sporadic. From the general taxonomic point of view all the species were grouped under 5 families of under order Odonata. Comparing different body parts the double branching keys were prepared for easy identification of 15 common dragonfly species recorded in rice ecosystems of West Bengal. Each key begins with a couplet (a pair of alternative) and each of which leads to another couplet. Finally the reader reaches the specific identity of species. Free hand drawing of wings of the 50 dragonflies were also used for separate identification of these insect species. In addition to this, different studies were made on courtship and mating, egg laying habitats, nymphal development, longevity, flight capacity of dragonfly to make the study more interesting to the reader. The population build up of dragonfly, favors to certain altitude as well as availability of water which is reverse to the other group of insects. Three different localities were selected at 9.75 m (Chakdaha), 200 m (Cooch Behar) and 1250 m (Kalimpong) of which former two represent an unique physiographic ecological system in Eastern India characterized by extreme diversities of dragonfly inhabiting there. The studies on natural enemies of dragonfly along with their major threats indicated that about 2, 4 and 4 species were critically endangered, endangered and vulnerable in rice ecosystem of West Bengal. Dragonflies are very sensitive to changes in landscape and are reliable indicators of wetland health. Therefore the effective conservation of dragonfly depends entirely on conservation of their habitats. Different studies were made to estimate the role of dragonfly in integrated pest management of rice crop in West Bengal. An investigation was also carried out to find out the crop stage wise diversification of individual predator and found that dragonfly was more diverse during flowering to ripening stages of crop respectively. The values Simpson and Shanon diversity index showed that dragonflies are specific flowering to ripening stage of crop. Subsequently the value of Margalef index and Menhinick index also indicated that the aforesaid predators were more diverse in flowering stage of crop whereas it was least in vegetative stage of crop. From the Hill's diversity the number of abundant and most abundant species was calculated where maximum and minimum were obtained from dragonfly and staphylinid respectively. The studies on colonization and succession of major dragonfly taxa in the rice field indicated that it followed a uniform pattern in relation to growth stages as well different phases in the rice field. The studies on relative abundance of dragonfly in different ecosystems reflected that their population in fields could be conserved and enhanced through maintenance of rice weed flora on bund or allowing ratoon rice after the rice crop during fallow period. The fallow land has limited effect on incidence of insect predator in rice crop. The relative ranking chart of 50 important predators in rice ecosystem of West Bengal indicates that the insect belonging to Coleopteran (17) were top of the list whereas dragonfly was third (10). The validity of chart may increase over time and they will need to be updated periodically.
Źródło:
World Scientific News; 2017, 86, 2; 67-133
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New insights into the origin and relationships of blastoid echinoderms
Autorzy:
Paul, C.R.C.
Powiązania:
https://bibliotekanauki.pl/articles/2082286.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Blastozoa
Glyptocystitoida
Hemicosmitoida
Coronata
Blastoidea
homology
phylogeny
ontogeny
Opis:
“Pan-dichoporites” (new informal term) is proposed to unite Cambrian blastozoans, such as Cambrocrinus, Ridersia, and Sanducystis, glyptocystitoid and hemicosmitoid rhombiferans, coronates, blastoids, and Lysocystites. Pan-dichoporite ambulacra have double biserial main axes with brachiole facets shared by pairs of floor (glyptocystitoids), side (blastoid) or trunk (hemicosmitoids, coronates) plates. These axial plates are the first two brachiolar plates modified to form the ambulacral axes. In glyptocystitoids the first brachiole facet in each ambulacrum is shared by an oral and another plate. Hence, these are also two modified brachiolar plates and part of the axial skeleton under the Extraxial Axial Theory (EAT). Pan-dichoporites are also characterized by thecae composed of homologous plate circlets. The unique glyptocystitoid genus Rhombifera bears ambulacral facets on five radial plates, which alternate with five orals. The oral area of Lysocystites (blastoid sensu lato) is very similar, which suggests that rhombiferan radials are homologous with “ambulacrals” of Lysocystites and hence with blastoid lancet plates. This implies derivation of blastoids from glyptocystitoids and suggests that blastoid and coronate radials and deltoids are homologous with rhombiferan infralaterals and laterals. Thus, homologous plate circlets occur in all pan-dichoporites, which strengthens the validity of a pan-dichoporite clade. Under Universal Elemental Homology (UEH), deltoids were homologized with rhombiferan orals, but this is inconsistent with the EAT. Deltoids bear respiratory pore structures and so are perforate extraxial skeletal plates, whereas rhombiferan orals are axial skeleton. The new plate homologies also explain why only five plates form the oral frames of coronates, blastoids and Lysocystites, whereas glyptocystitoids (except Rhombifera) have six oral frame plates; all glyptocystitoids have only five laterals. Hemicosmitoids arose by paedomorphic ambulacral reduction, but the paedomorphosis also affected the thecal plates and stem. Paedomorphosis poses special problems for cladistic character analysis, since the new characters often appear to be plesiomorphic.
Źródło:
Acta Palaeontologica Polonica; 2021, 66, 1; 41-62
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Afghanistan’s Civil War (1979-1989): Illegal and Failed Foreign Interventions
Autorzy:
Terry, Patrick C. R.
Powiązania:
https://bibliotekanauki.pl/articles/706873.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Nauk Prawnych PAN
Tematy:
Afghanistan
Soviet Union
USRR
civil war
Opis:
For about ten years now people in NATO member states have, on a daily basis, been confronted with the faltering attempts by their troops to create a semblance of stability in Afghanistan. It is now widely recognized that Afghanistan has become an intractable international problem. This article, however, focuses on previous attempts to impose solutions. Beginning in the late 1970s and continuing throughout the 1980s, the two Cold War superpowers, the USSR and the USA, intervened in Afghanistan’s affairs. In this article the legality, under international law, of those efforts is examined. This requires an extensive analysis of international law as applicable to external interventions in civil wars. It will be demonstrated that neither the USSR’s invasion of Afghanistan, nor the USA’s massive support of the Afghan rebels, was reconcilable with international law. Considering the fact that these ill-advised interventions in Afghanistan backfired on both superpowers, they constitute a good object lesson to demonstrate that the prohibition of external interventions in civil wars not only reflects what international law demands, but is also simple common sense. Recent interventions in Bahrain and Libya are also briefly examined as to their legality, and this examination includes projections whether the unsatisfactory results of the Afghanistan interventions will be replicated there.
Źródło:
Polish Yearbook of International Law; 2011, 31; 107-164
0554-498X
Pojawia się w:
Polish Yearbook of International Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Star Coloring of Subcubic Graphs
Autorzy:
Karthick, T.
Subramanian, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/30146582.pdf
Data publikacji:
2013-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
vertex coloring
star coloring
subcubic graphs
Opis:
A star coloring of an undirected graph G is a coloring of the vertices of G such that (i) no two adjacent vertices receive the same color, and (ii) no path on 4 vertices is bi-colored. The star chromatic number of G, χs(G), is the minimum number of colors needed to star color G. In this paper, we show that if a graph G is either non-regular subcubic or cubic with girth at least 6, then χs(G) ≤ 6, and the bound can be realized in linear time.
Źródło:
Discussiones Mathematicae Graph Theory; 2013, 33, 2; 373-385
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induced acyclic tournaments in random digraphs: Sharp concentration, thresholds and algorithms
Autorzy:
Dutta, Kunal
Subramanian, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/31232000.pdf
Data publikacji:
2014-08-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
random digraphs
tournaments
concentration
thresholds
algorithms
Opis:
Given a simple directed graph $D = (V,A)$, let the size of the largest induced acyclic tournament be denoted by $mat(D)$. Let $D ∈ \mathcal{D}(n, p)$ (with $p = p(n)$) be a random instance, obtained by randomly orienting each edge of a random graph drawn from $\mathcal{G}(n, 2p)$. We show that $mat(D)$ is asymptotically almost surely (a.a.s.) one of only 2 possible values, namely either $b^\ast$ or $b^\ast + 1$, where $b^\ast = ⌊2(log_rn) + 0.5⌋$ and $r = p^{−1}$. It is also shown that if, asymptotically, $2(log_rn) + 1$ is not within a distance of $w(n)//(ln n)$ (for any sufficiently slow $w(n) → ∞$) from an integer, then $mat(D)$ is $⌊2(log_rn) + 1⌋$ a.a.s. As a consequence, it is shown that $mat(D)$ is 1-point concentrated for all $n$ belonging to a subset of positive integers of density 1 if $p$ is independent of $n$. It is also shown that there are functions $p = p(n)$ for which $mat(D)$ is provably not concentrated in a single value. We also establish thresholds (on $p$) for the existence of induced acyclic tournaments of size i which are sharp for $i = i(n) → ∞$. We also analyze a polynomial time heuristic and show that it produces a solution whose size is at least $log_rn + Θ(\sqrt{log_rn})$. Our results are valid as long as $p ≥ 1//n$. All of these results also carry over (with some slight changes) to a related model which allows 2-cycles.
Źródło:
Discussiones Mathematicae Graph Theory; 2014, 34, 3; 467-495
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intersection Dimension and Graph Invariants
Autorzy:
Aravind, N.R.
Subramanian, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/32083820.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
circular dimension
dimensional properties
forbidden-subgraph colorings
Opis:
We show that the intersection dimension of graphs with respect to several hereditary properties can be bounded as a function of the maximum degree. As an interesting special case, we show that the circular dimension of a graph with maximum degree Δ is at most \(O\Big(\Delta\frac{log\Delta}{log log\Delta}\Big)\). It is also shown that permutation dimension of any graph is at most $\Delta(log \Delta)^{1+o(1)}$. We also obtain bounds on intersection dimension in terms of treewidth.
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 153-166
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recurrent neural identification and control of a continuous bioprocess via first and second order learning
Autorzy:
Baruch, I.
Mariaca-Gaspar, C. R.
Powiązania:
https://bibliotekanauki.pl/articles/385133.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
backpropagation learning
direct adaptive neural control
indirect adaptive sliding mode control
Kalman filter recurrent neural network identifier
Levenberg-Marquardt learning
Opis:
This paper applies a new Kalman Filter Recurrent Neural Network (KFRNN) topology and a recursive Levenberg-Mar quardt (L-M) learning algorithm capable to estimate para meters and states of highly nonlinear unknown plant in noisy environment. The proposed KFRNN identifier, learned by the Backpropagation and L-M learning algorithm, was incorporated in a direct and indirect adaptive neural con trol schemes. The proposed control schemes were applied for real-time recurrent neural identification and control of a continuous stirred tank bioreactor model, where fast convergence, noise filtering and low mean squared error of reference tracking were achieved.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 4; 37-52
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of sewage sludge biogas fermentation with different temperatures and addition of maize silage
Porównanie wydajności biogazowej osadów ściekowych, w tym z dodatkiem kiszonki z kukurydzy w różnych temperaturach
Autorzy:
Carmona, P. C. R.
Dach, J.
Powiązania:
https://bibliotekanauki.pl/articles/357151.pdf
Data publikacji:
2015
Wydawca:
Politechnika Śląska
Tematy:
biogaz
osad ściekowy
kiszonka z kukurydzy
fermentacja mezofilowa
fermentacja termofilowa
biogas
sewage sludge
maize silage
fermentation
mesophilic
thermophilic
Opis:
Kiszonka z kukurydzy jest podstawowym surowcem wykorzystywanym w polskich biogazowniach. Jednak ze względu na coraz wyższe ceny tego substratu oraz wahania cen zielonych certyfikatów, koniecznym staje się poszukiwanie różnych substratów do produkcji biogazu. Z drugiej strony, duża ilość osadu wyprodukowanego w oczyszczalniach ścieków, tworzy poważny problem dla środowiska w Polsce. Stosowanie osadów ściekowych jako źródła energii odnawialnej może zmniejszyć ilość składowanych osadów i poprawić bezpieczeństwo środowiska. Problemem podczas beztlenowej fermentacji osadu ściekowego jest konieczność wystąpienia odpowiedniego stosunku C:N na poziomie 20-30. Dlatego ważne jest aby dodać do osadów innych, bogatych w węgiel materiałów. Przemawia również za tym fakt iż sam osad nie jest wydajnym substratem do produkcji biogazu. Zastosowanie ko-substratów pomoże maksymalnie wykorzystać potencjał fermentacyjny, reguluje kinetykę fermentacji metanowej poprzez poprawę stosunku C:N, zwiększa wydajność i opłacalność ekonomiczną procesu. Celem pracy było znalezienie synergii pomiędzy osadami ściekowymi oraz kiszonką z kukurydzy w dwóch różnych temperaturach: 39ºC (zakres mezofilowy) i 55ºC (zakres termofilowy).
Maize silage is the primary feedstock utilized in biogas plants in Poland. However, due to the increasingly high price of that substrate and the volatile prices of green certificates, it is necessary to search for different substrates for the biogas production. On the other hand, the large amount of sewage sludge produced in wastewater treatment plants creates an important environmental problem in Poland. The use of sewage sludge as a source of renewable energy reduces the amount of stored sludge and improves environmental safety. The problem during anaerobic digestion of sewage sludge is to provide a suitable C:N ratio in the range 20-30. Therefore, it is important to add to the sludge substances rich in carbon. It is because the sludge itself is an inefficient substrate in terms of biogas production. The use of co-substrates ensures maximum use of the potential of the digester, regulates the kinetics of methane fermentation by improving the C:N ratio, increasing its efficiency and economic viability. The aim of this paper is to find synergy between sewage sludge and maize silage in two different temperatures: 39ºC (mesophilic range) and 55ºC (thermophilic range).
Źródło:
Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2015, 17, 3; 61-72
1733-4381
Pojawia się w:
Archiwum Gospodarki Odpadami i Ochrony Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Delineation of EMS-induced genetic variability in some agronomic traits in mungbean, Vigna radiata (L.) Wilczek.
Autorzy:
Singh, Rupinder
Agarwal, M.
Kole, C. R.
Powiązania:
https://bibliotekanauki.pl/articles/2199155.pdf
Data publikacji:
2008-06-22
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
EMS
genetic variability
Mungbean
Vigna radiata
Opis:
The investigation involved treatment of pre-soaked seeds (11h) of a mungbean cutivar, PUSA 9072 with five doses of ethyl methane suphonate (EMS) at 0.1, 0.25, 0.5, 0.75 and 1% for 4hr under dark. Observation on field grown mutagenized population with regard to 14 agronomic characters evidenced for induction of the variability in the M1 generation itself. The CV values of the traits for mutagenised population were stupendously higher for most of the test characters to the tune of 57% cases as compared to the untreated (control) plants...
Źródło:
Plant Breeding and Seed Science; 2008, 57; 21-24
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dehydrofreezing of fruit using direct osmosis as concentration process
Zamrażanie owoców częściowo odwodnionych przez bezpośrednią osmozę
Autorzy:
Pinnavaia, G.
Dallarosa, M.
Lerici, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/1399330.pdf
Data publikacji:
1988
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Opis:
Proces zamrażania w stanie częściowego odwodnienia (ang. dehydrofreezing) obejmuje częściowe osuszenie produktu przed mrożeniem. Niższa zawartość wody w produkcie podczas mrożenia daje następujące korzyści: - niższe zużycie energii na jednostkę świeżego produktu w czasie etapu mrożenia i późniejszego składowania, - obniżenie punktu krioskopowego, zmniejszenie ilości wody wymrażanej i wzrost szybkości mrożenia i rozmrażania. Bezpośrednia osmoza była przebadana jako technika odwodnieniowa dla wielu rodzajów owoców. Uzyskano ponadto następujące korzyści: - obniżenie zapotrzebowania na energię w procesie suszenia, - wzrost ogólnej zawartości składników suchej masy w produkcie z utrzymaniem konsystencji. - pobranie cukrów z syropu, lepsze zachowanie aromatu i lepsze zachowanie barwy, - obniżenie kwasowości i polepszenie właściwości organoleptycznych, - obniżenie skłonności do enzymatycznego brunatnienia.
Źródło:
Acta Alimentaria Polonica; 1988, 14(38), 1; 51-57
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osteological correlates for quadrupedality in ornithischian dinosaurs
Autorzy:
Maidment, S.C.R.
Barrett, P.M.
Powiązania:
https://bibliotekanauki.pl/articles/20234.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
The evolution of quadrupedality from bipedal ancestors is an exceptionally rare transition in tetrapod evolution, but it has occurred several times within the herbivorous dinosaur clade Ornithischia. Stegosauria, Ankylosauria, and Ceratopsidae are all uncontroversially quadrupedal, while basal ornithischians and basal ornithopods are uncontroversially bipedal. However, stance in iguanodontian ornithopods, including the hadrosaurs, and in non-ceratopsid ceratopsians is debated because robust osteological correlates of quadrupedality have not been identified. We examine a suite of characteristics that have been previously proposed as osteological correlates for bipedality or quadrupedality in dinosaurs. These include both discrete anatomical features, which we assess as correlates for quadrupedality using character optimization onto a composite cladogram, and proportional ratios, which we assess as correlates by reconstructing nodal ancestral states using squared-change parsimony, followed by optimization. We also examine the correlation of these features with body size. An anterolateral process on the proximal ulna, hoof-shaped manual unguals, a transversely broadened ilium, a reduced fourth trochanter and a femur longer than the tibia are found to be robust correlates of quadrupedality in ornithischian dinosaurs. Along the ceratopsid “stem” lineage, quadrupedal characters were acquired in a stepwise fashion, with forelimb characters developing prior to changes in the hind limb. In contrast, iguanodontid ornithopods display a mosaic of character states, indicating varying degrees of facultative quadrupedality that probably arose for a variety of different reasons. Hadrosaurs are found to possess all character states associated with quadrupedality and were probably predominantly quadrupedal. In general, quadrupedal ornithischians do not appear to have been constrained by their bipedal ancestry to a particular order of character acquisition.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity of Blastocystis spp. in the human population of the Olsztyn area
Autorzy:
Lepczynska, M.
Dzika, E.
Stensvold, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/5729.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
genetic diversity
Blastocystis
enteric protist
host
human population
Olsztyn region
Źródło:
Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1056

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