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Wyświetlanie 1-15 z 3384
Tytuł:
Ocena efektywności ekonomicznej i energetycznej produkcji pszenicy ozimej i rzepaku ozimego wykorzystanych do produkcji biopaliw
Evaluation of economic effectiveness and power consumption for farming of winter rapeseed and winter wheat utilized for biofuel production
Autorzy:
Dobek, T. K.
Powiązania:
https://bibliotekanauki.pl/articles/287679.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
biopaliwo
koszt produkcji
nakłady pracy
efektywność ekonomiczna
efektywność energetyczna
biofuel
cost of production
cost of labour
economic effectiveness
power consumption
Opis:
Przeprowadzono ekonomiczną i energetyczną ocenę technologii produkcji pszenicy ozimej i rzepaku ozimego, przetworzenia płodów na biopaliwa oraz obliczenie wskaźników efektywności ekonomicznej i energetycznej produkcji biodiesla z rzepaku ozimego i bioetanolu z pszenicy ozimej. Z przeprowadzonych badań wynika, że produkcja biopaliw może być opłacalna pod warunkiem sprzedaży nie tylko biopaliwa, ale także słomy i w przypadku rzepaku - śruty poekstrakcyjnej. Dotyczy to również efektywności energetycznej produkcji biopaliw.
Economic and power consumption evaluation was conducted with reference to farming of winter rapeseed and winter wheat, processing of those crops into biofuels as well as calculation of economic and power use effectiveness for processing of diesel oil biofuel from winter rapeseed and bioethanol from winter wheat. The research indicates that the production of biofuels may be profitable if it's sale could be combined with sale of is offered in conjunction with straw, and in case rapeseed - in conjunction with extraction cake. It also pertains to the power use effectiveness in the production of biofuels.
Źródło:
Inżynieria Rolnicza; 2007, R. 11, nr 6 (94), 6 (94); 41-48
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive control scheme based on the least squares support vector machine network
Autorzy:
Mahmoud, T. K.
Powiązania:
https://bibliotekanauki.pl/articles/930155.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
modelowanie systemu
system nieliniowy
system sterowania
sieć neuronowa
maszyna wektorów wspierających
support vector machine (SVM)
neural network
nonlinear system modeling
nonlinear system control
pH control
Opis:
Recently, a new type of neural networks called Least Squares Support Vector Machines (LS-SVMs) has been receiving increasing attention in nonlinear system identification and control due to its generalization performance. This paper develops a stable adaptive control scheme using the LS-SVM network. The developed control scheme includes two parts: the identification part that uses a modified structure of LS-SVM neural networks called the multi-resolution wavelet least squares support vector machine network (MRWLS-SVM) as a predictor model, and the controller part that is developed to track a reference trajectory. By means of the Lyapunov stability criterion, stability analysis for the tracking errors is performed. Finally, simulation studies are performed to demonstrate the capability of the developed approach in controlling a pH process.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 685-696
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Criticality Due to the Topological Effects in the Hubbard Model
Autorzy:
Kopeć, T. K.
Powiązania:
https://bibliotekanauki.pl/articles/2047311.pdf
Data publikacji:
2007-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.20.Fg
71.10.Pm
Opis:
We argue that in a strongly correlated electron system collective instanton excitations of the phase field (dual to the charge) arise with a great degree of stability, governed by gauge flux changes by an integer multiple of 2π. By unraveling consequences of the nontrivial topology of the charge gauge U(2) group, we found that the pinning of the chemical potential and the zero-temperature divergence of charge compressibility define a novel "hidden" quantum criticality on verge of the Mott transition governed by the protectorate of stable topological numbers rather than the Landau paradigm of the symmetry breaking.
Źródło:
Acta Physica Polonica A; 2007, 111, 4; 527-536
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-snail infestation of Devonian crinoids and the nature of platyceratid-crinoid interactions
Autorzy:
Baumiller, T K
Powiązania:
https://bibliotekanauki.pl/articles/20265.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
USA
Silica Formation
Devonian
platyceratid-crinoid interaction
biotic interaction
crinoid
snail
Middle Devonian
paleontology
Ohio
Opis:
The well−known association of platyceratid snails and crinoids typically involves a single snail positioned on the tegmen of the crinoid host; this has led to the inference of coprophagy. Two specimens of the camerate crinoid Arthroacantha from the Middle Devonian Silica Formation of Ohio, USA, exhibit numerous snails on their tegmens. On one of these, 6 platyceratid juveniles of approximately equal size are found on the tegmen. On the second crinoid, the largest of 7 infesting platyceratids occupies the typical position over the anal vent while others are either superposed (tiered) upon it or are positioned elsewhere on the tegmen. These specimens illustrate that platyceratids (1) settled on crinoids as spat, (2) were not strictly coprophagous during life yet (3) benefited from a position over the anal vent.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molluscan fauna of abandoned crystalline limestone quarry in Rogozka (Lower Silesia, Krowiarki Range, Stronie Slaskie commune)
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/83188.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
mollusc
fauna
abandoned quarry
crystalline limestone
Rogozka village
Lower Silesian region
Krowiarki Mountains
Stronie Slaskie commune
Snieznik Massif
endangered species
ecology
succession
Calusilia parvula
Helicigona lapicida
malacofauna
quarry
Opis:
The paper deals with succession in an abandoned quarry of crystalline limestone, located in the village of Rogóżka (Krowiarki Mts near Konradów, the northern extension of the Śnieżnik Massif). Its bottom is covered by synanthropic communities of unspecified systematic rank and communities of limestone screes as well as clumps of Alnus incana and Betula sp. The following communities, gradually entering the quarry, have been distinguished: Dentario-Fagetum, Aceri-Tilietum and Carici remotae-Fraxinetum. The malacofauna collected in the quarry (45 species) constitutes 50.6% of the terrestrial snails recorded from the OEnieżnik Massif (89 species) and 43.7% of those collected in the Kłodzko Region (103 species). Seven of the 15 clausiliid species recorded from the Kłodzko Region were found in the quarry (47%), which indicates considerable diversity of the microhabitats. The most important species include Eucobresia diaphana, Semilimax semilimax, Macrogastra tumida, Helicigona lapicida, and most of all Clausilia parvula; for the last species the quarry in Rogóżka is the only extant locality in the Kłodzko Region. The fate of the quarry’s malacofauna is uncertain, since formally it has not been exluded from exploitation; measures need be taken to establish a nature reserve there.
Źródło:
Folia Malacologica; 2011, 19, 3
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Helicodonta obvoluta (O.F. Muller, 1774) (Gastropoda: Pulmonata: Helicidae) - up-dated distribution in Poland, threats and conservation status
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/84059.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
H. obvoluta is endangered within its whole distribution range. It is a C. European species, distributed from the Pyrennees and the Atlantic coast of France to southern Slovakia and northern Hungary; it occurs also in Great Britain, Schleswig-Holstein, southern part of Moravy, Albania, Bosnia, northern Serbia and in Italy. In Poland it has few localities in the central Sudetes. It is a typical forest-dweller of montane areas, associated with dead timber which is necessary for its reproduction, feeding and hibernation. Its presence in ten sites in Poland has been confirmed. The main threats for the species are clear-felling and removal of dead timber.
Źródło:
Folia Malacologica; 2003, 11, 1-2
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie aktywnej immunizacji na rozmieszczenie Toxoplasma gondii w gałce ocznej płodu i myszy dojrzałej
The effect of active immunization on the distribution of Toxoplasma gondii inneyballs of the foetus and mature mice
Znachenie aktivnojj immunizacii dlja razmeshhenija Toxoplasma gondii v glaznom jabloke zaradysha i zrelojj myshi
Autorzy:
Niebrój, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/2176804.pdf
Data publikacji:
1972
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Wiadomości Parazytologiczne; 1972, 18, 2-3; 243
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Klinika toksoplazmowych schorzeń oczu
The clinic of ophtalmic diseases caused by Toxoplasma gondii
Klinika toksoplazmaticheskikh zabolevanijj glaz
Autorzy:
Niebrój, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/2176858.pdf
Data publikacji:
1972
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Wiadomości Parazytologiczne; 1972, 18, 2-3; 299-305
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Life cycle of Helicodonta obvoluta
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/83099.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
life cycle
Helicodonta obvoluta
species distribution
reproductive period
egg
animal reproduction
shell size
snail
Źródło:
Folia Malacologica; 1999, 07, 4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ślimaki (Gastropoda) Kotliny i Pogórza Wałbrzyskiego
Gastropods of the glen Kotlina Walbrzyska and highlands Pogorze Walbrzyskie
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/83451.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
The gastropod fauna of the glen Kotlina Wa³brzyska and highlands Pogórze Wa³brzyskie was studied in 1993–1995. A total of 89 species were collected from 63 localities. The following species are rare in the Sudetes: Segmentina nitida (O. F. Müll.), Succinea elegans Risso, Vertigo antivertigo (Drap.), Arion silvaticus Lohmander, Vitrea contracta (Wstld), Daudebardia rufa (Drap.), Tandonia rustica (Millet), Clausilia parvula Fér., Balea perversa (L.), Helicodonta obvoluta (O. F. Müll.) and Causa holosericeum (Studer). The fauna of the glen KotlinaWa³brzyska differs from that of the highlands PogórzeWa³brzyskie, the former being much poorer as a result of the strong anthropopressure. Zoogeographically, widely distributed species (Holarctic, Palaearctic, Eurosiberian, European) constitute most of the studied fauna (51.6%).
Źródło:
Folia Malacologica; 1999, 07, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Life cycle and population dynamics of Helicodonta obvoluta (O.F.Muller, 1774) (Gastropoda: Pulmonata: Helicidae)
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/83552.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
Lifecycleof Helicodonta obvoluta (O. F. Müll.) was studied in the field and in laboratory. Mating lasts 2–3 hrs and includes: meeting of the partners, recognition, courtship dance, copulation, resting phase and parting. No spermatophores were observed upon dissection of a total of 90 adult individuals which seems to indicatethat H. obvoluta does not produce them. The egg-laying snail embeds anterior part of its body 4–6 mm deep in rotting timber. The egg-laying lasts from about a dozen hours to two days. Freshly laid eggs are white, calcified, slightly translucent and get opaque in a few days. They are slightly oval, of 2.10–2.85 mm major and 2.00–2.60 mm minor diameter. In laboratory, eggs are laid in spring (March-June) and autumn (August-November), in the field, the egg-laying periods are somewhat shorter (April-beginning of June, end of August-beginning of October). Most laboratory snails laid eggs only once in their lifetime, the maximum number of egglaying periods was four. The percentage of hatching eggs in laboratory is ca. 59%. The number of eggs per clutch ranges from 9 to 27. The incubation period ranges from 14 to 31 days, and is shorter for spring (14–18 days) compared to autumn (19–23 days) clutches. Hatching is asynchronous, lasting from 1 to 4 days. With approaching hatching, thewhitecolour of thee gg disappears, so that theyoung snail is surrounded only by a translucent membrane, which gets broken as a result of its movements. Newly-hatched snails have shells of 1 whorl, devoid of periostracal hairs. No egg cannibalism was observed. Out of 174 young hatched in laboratory, 159 reached maturity. During numerous dissections of adult individuals no eggs were found in the reproductive tracts; if there is an egg-retention, it must be very short-lasting. Placing eggs in rotting timber and covering them with mucus protects them from drying-out, ensures a more favourable temperature and limits accessibility to predators. The number, relative and absolute size of eggs, number of clutches per year and per lifetime, and the life span seem to be correlated with size rather than with phylogenetic position of the species. No uniparental reproduction was observed. In laboratory the time elapsing between hatching and maturity (lip completely formed) ranged from 140 to 624 days; it varied between individuals hatched in particular years and seasons, e.g. young of the spring 1997 grew much faster (mean 354 days) than those of the spring 1999 (mean 442 days). The time required to reach full size was not correlated with the ultimate number of whorls. The growth shows three distinct phases: a quick initial phase of 3–4 months, a slow phase, and a short quick phase preceding lip formation. The monthly increment depends on the growth phase: 1.15 whorl in phases 1 and 3, 0.30 whorl in phase2. Thegrowth ratein thefie ld is similar to that observed in laboratory, though with a wider scatter within growth phases and some differences between years and seasons. Depending on weather conditions, theyounge st ageclass (1) appears from April till Juneor from May till July, and from thee nd of August till the beginning of October. Thus each season two new generations are produced: spring and autumn. The spring generation, depending on the month of hatching, may complete its growth in the same season and winter as adults, or reach stage 4 or 5 and complete their growth next spring. The autumn generation always winters as immature snails which complete their growth in late spring next year. Adult snails (c. 1 year old) dominatein all themonthly samples, whileolde r individuals arefe w. In laboratory, thelifespan ranged from 516 to 1,187 days; thus thelifespan of someindividuals exceeds 3 years. Thee stimateof lifespan in the field, based on marking-release-recapture, is less exact, but on the whole the oldest snails in the field lived slightly over 3 years, whilelifespan of somewas only 2 years. In laboratory and in thefie ld, thesnails reproducein spring and autumn. In laboratory, they areactive(fe eding, crawling) throughout theye ar, but in winter resting periods of a few days at a time are observed, with the aperture covered by a thin epiphragm. In the field, the snails enter winter torpor at the end of October/beginning of November, having penetrated rotting logs from below, and stay in rotting wood with their apertures covered with thick, calcified epiphragms. Depending on weather, they get active at the beginning or end of April. Under conditions of constant temperature and humidity (indoors) adult snails show two activity peaks: late evening and early morning, with a resting period during theday . Immatureindividuals aremoreactive , with a constant high activity sinceafte rnoon till mid-morning, and most remain activeduring theday . In conditions of variablete mperatureand humidity (out- oors), the activity of all age classes depends on humidity and temperature, the immature snails, like in constant conditions, being generally more active. The mobility of H. obvoluta is rather high, individual snails cover the distance of 4–5 or even 7 metres during a month.
Źródło:
Folia Malacologica; 2003, 11, 3-4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reproductive system development and annual cycle of gonad activity in Helicodonta obvoluta (O.F.Muller, 1774) (Gastropoda: Pulmonata: Helicidae s. Lat.)
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/84228.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
The reproductive system structure in H. obvoluta follows the helicid pattern except for the dart sac which is absent. In juvenile snails the gonad is the first to develop; the later development of male and female reproductive organs is synchronous. At the stage of lip formation the reproductive system is fully developed. At an initial stage of the gonad development (3 and 4 whorls) mitotically dividing cells prevail, and the first pools of oocytes and spermatocytes in meiotic prophase appear. At the stage of 5 whorls the number of mitoses decreases, while the number of cells in meiotic prophase increases considerably, resulting in an increase in the gonad volume. The first growing oocytes appear, while spermatids and mature spermatozoa are absent. The gonad in lip-building snails contains all the cells characteristic of mature hermaphroditic gland. In mature gonad oocytes and spermatozoa are present throughout the year. The number and size of oocytes vary seasonally. Large vitellogenic oocytes are present from April till the beginning of July and from the end of August till October. The pool of growing oocytes appears in August and in November-December. The intensity of divisions leading to formation of the respective gametes changes in a similar way. The development of female lineage cells seems to determine the timing of reproduction, since spermatozoa are present throughout the year.
Źródło:
Folia Malacologica; 2003, 11, 1-2
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shell variation in Helicodonta obvoluta (O.F. Muller, 1774) (Gastropoda: pulmonata: Helicidae s. lato)
Autorzy:
Maltz, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/84542.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Opis:
Biometrical analysis of the material of 668 adult shells of Helicidonta obvoluta (Müll.) from Great Britain, Spain, Italy, Switzerland, Germany, Poland, the Czech Republic, Slovakia and Hungary showed a high inter-population variation. Similarity analysis revealed two clusters of populations: one from the centre of the range, another inhabiting its fringes. Snails from the Abruzzi Mts (Central Apennines) had shells similar to those from the central populations, though the area is located on the southern fringe of the distribution range.
Źródło:
Folia Malacologica; 2007, 15, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topological Criticality on Brink of the Mott Transition in High-T$\text{}_{c}$ Superconductors
Autorzy:
Kopeć, T. K.
Powiązania:
https://bibliotekanauki.pl/articles/2046733.pdf
Data publikacji:
2006-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.20.-z
74.20.Fg
71.10.Pm
Opis:
The concept of topological excitations and the related ground state degeneracy are employed to establish an effective theory of the superconducting state evolving from the Mott insulator for high-T$\text{}_{c}$ cuprates. The theory includes the effects of the relevant energy scales with the emphasis on the Coulomb interaction $U$ governed by the electromagnetic U(1) compact group. The results are obtained for the layered t-t'-t$\text{}_{⊥}$-U-J system of strongly correlated electrons relevant for cuprates. Casting the Coulomb interaction in terms of composite-fermions via the gauge flux attachment facility, we show that instanton events in the Matsubara "imaginary time", labelled by a topological winding numbers, governed by gauge flux changes by an integer multiple of 2π, are essential configurations of the phase field dual to the charge. The impact of these topological excitations is calculated for the phase diagram, which displays the "hidden" quantum critical point on verge of the Mott transition that is given by a divergence of the charge compressibility.
Źródło:
Acta Physica Polonica A; 2006, 109, 4-5; 499-506
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie rentowności z wynajmu lokali mieszkalnych w czterech miastach wojewódzkich południowej Polski
Comparison of the profitability of rental housing in the four provincial capitals of Southern Poland
Autorzy:
Grabowski, T.K.
Powiązania:
https://bibliotekanauki.pl/articles/868357.pdf
Data publikacji:
2013
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Tematy:
Polska Poludniowa
miasta
mieszkania
najem
rentownosc
analiza porownawcza
Krakow
Polska
mieszkalnictwo
Opis:
Celem badań było porównanie rentowności wynajmu lokali mieszkalnych na rynku pierwotnym i wtórnym w czterech miastach wojewódzkich południowej Polski: Krakowie, Katowicach, Kielcach oraz Rzeszowie w latach 2006-2012. Zakup mieszkania na wynajem w tych miastach jest rozważany przez bardzo wielu inwestorów. Przez długi czas najpopularniejszym miejscem takich inwestycji był Kraków, jednak zmieniająca się sytuacja rynkowa powoduje powolne odejście inwestorów do Katowic i Rzeszowa. Wraz ze wzrostami czynszów, wzrosła również rentowność wynajmu lokali mieszkalnych w Rzeszowie. W przypadku zakupu mieszkań z drugiej ręki i ich wynajmu, w Katowicach inwestor może uzyskać zwrot kapitału już po 12 latach, a w Krakowie dopiero po 21.
The aim of the research was to compare profitability of renting flats on both, primary and secondary market in four provincial capitals in the south of Poland: Kraków, Katowice, Kielce and Rzeszów in the period of 2006-2012. Purchase of a flat in order to rent in these cities is considered by numerous investors. Kraków was the most popular place of such investments for a long time. However, due to changes on the market investors slowly leave to Katowice and Rzeszów. Along with rentals increase in Rzeszów, profitability of renting flats increased as well. In case of purchasing a flat at second-hand and then renting it in Katowice an investor may obtain payback after 12 years, whereas in Kraków after 21 years.
Źródło:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2013, 15, 6
1508-3535
2450-7296
Pojawia się w:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
Dostawca treści:
Biblioteka Nauki
Artykuł
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