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    Wyświetlanie 1-23 z 23
    Tytuł:
    Morphogenetic features of talus cones in northwestern Wedel Jarlsberg Land, Spitsbergen
    Autorzy:
    Nitychoruk, Jerzy
    Dzierżek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2053231.pdf
    Data publikacji:
    1988
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Spitsbergen
    geomorphology
    talus cones
    Źródło:
    Polish Polar Research; 1988, 9, 1; 73-85
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dalsze badanie struktur w okolicach Wyszkowa – wyniki prac terenowych
    Further investigation of structures near Wyszkow – field research results
    Autorzy:
    Walesiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033139.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    crater
    impact
    oblique
    planar deformation features
    shatter cones
    shocked quartz
    Opis:
    There are specified criteria used to verify if some geological structure was developed during hypervelocity impact. Some of them are related to the passage of a shock wave through rocks, so are considered as definitive. Porządzie, Jaszczulty & Ochudno are structures discovered in 2014 (based on LiDAR data). They have many features suggesting possible impact origin. In shape of Porządzie there can be even recognized possible traces of shock waves, similar to those present during hypersonic flow (similar to observed e.g. in an airburst shape of extraordinary bright meteors). Unfortunately, this kind of observations (morphometry) on Earth is still considered as not enough to confirm the crater. The aim of recent study was to search for additional traces, which may help to prove that mentioned structures were created during common oblique impact event. Initially there were chosen 3 locations for outcrops, but finally samples were collected from 6 smaller pits. In Porzadzie structure there were discovered cemented rocks with various shape and size (concretions or lithic, parautochtonous breccias) and 2 rocks with possibly shocked quartz, having basal sets of thin and straight lamellae. On once surface there were recognized hierarchal branched (including spoon-like) structures resembling shatter cones. In uprange, at depth of about 50–70 cm, soil was rich in small charcoal pieces (like in other relatively small craters: e.g. Campo del Cielo, Whitecourt, Kaali, Ilumetsa, Morasko). All these observations, taken together with previous results, are about to confirm impact origin of Porzadzie crater.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2019, 10; 168-192
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability of the hop bitter acids during long-term storage of cones with different maturity degree
    Autorzy:
    Skomra, Urszula
    Koziara-Ciupa, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/2148476.pdf
    Data publikacji:
    2020-03-31
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    hop
    alpha acids
    beta acids
    storage temperature
    cones maturity
    Opis:
    The aim of the study was to assess the dynamicsof changes in the content of hop bitter acids during long-termstorage of cones that vary in maturity degree under differenttemperature conditions. The impact of the degree of maturityof hop cones on the stability of bitter acids during storage islittle known so far, and it is important, because due to the systematicincrease of the hop growing area on individual farms, thecone harvesting period is extended beyond the optimal phase oftechnological maturity. Hop cultivars belonging to two groupswere included in the study: bitter (Magnat, Magnum) and aroma(Puławski, Sybilla). Cones were collected on a few dates duringvegetation season, starting from the phase in which they reachedmaximum size until the beginning of physiological maturity.The dried cones were stored at +5 °C and +20 °C for 12 monthsand tested every three months for alpha and beta acid contentusing HPLC. Studies have shown that too early a hop harvestadversely affected bitter acid content. Storage temperature hadsignificant impact on the degradation of alpha and beta acids. Ata higher temperature the decrease in the content of these compoundswas greater. The tested hop cultivars were characterized bydifferent stability of bitter acids. The highest stability of alphaacids was observed for Sybilla, while the lowest for Magnat.The stability of alpha and beta acids during long-term storageof the raw material, especially at + 20oC, depended on the degreeof cones maturity. The aging rate of hop cones was not thesame throughout the storage period. For the first 3–6 months ata temperature of +5oC, the bitter acid content remained at a levelsimilar to the initial one, later a relatively rapid decrease in thecontent of these metabolites occurred. At higher temperatures,the bitter acid stabilization period was shorter.
    Źródło:
    Polish Journal of Agronomy; 2020, 40; 16-24
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the existence of nonnegative radial solutions for p-Laplacian elliptic systems
    Autorzy:
    Jiang, Daqing
    Liu, Huizhao
    Powiązania:
    https://bibliotekanauki.pl/articles/1294162.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    elliptic system
    nonnegative radial solution
    existence
    fixed point theorem in cones
    Opis:
    The existence of nonnegative radial solutions for some systems of m (m ≥ 1) quasilinear elliptic equations is proved by a simple application of a fixed point theorem in cones.
    Źródło:
    Annales Polonici Mathematici; 1999, 71, 1; 19-29
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advances in cone-based preference modeling for decision making with multiple criteria
    Autorzy:
    Wiecek, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/375937.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    cones
    preferences
    nondominated solutions
    Pareto solutions
    multiple criteria
    decision making
    Opis:
    Decision making with multiple criteria requires preferences elicited from the decision maker to determine a solution set. Models of preferences, that follow upon the concept of nondominated solutions introduced by Yu (1974), are presented and compared within a unified framework of cones. Polyhedral and nonpolyhedral, convex and nonconvex, translated, and variable cones are used to model different types of preferences. Common mathematical properties of the preferences are discussed. The impact of using these preferences in decision making is emphasized.
    Źródło:
    Decision Making in Manufacturing and Services; 2007, 1, 1-2; 153-173
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Second-order optimality conditions in nonsmooth vector optimization
    Autorzy:
    Yadav, Priyanka
    Powiązania:
    https://bibliotekanauki.pl/articles/31342762.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    vector optimization
    cones
    nonsmooth second-order cone-convexity
    second-order optimality
    duality
    Opis:
    In this paper, we introduce new classes of nonsmooth second-order cone-convex functions and respective generalizations in terms of first and second-order directional derivative. These classes encapsulate several already existing classes of cone-convex functions and their weaker variants. Second-order KKT type sufficient optimality conditions and duality results for a nonsmooth vector optimization problem are proved using these functions. The results have been supported by examples.
    Źródło:
    Control and Cybernetics; 2023, 52, 1; 35-51
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two Funerary Cones of Padineith Found in the Theban Tomb MMA 1152
    Autorzy:
    Kopp, Edyta
    Powiązania:
    https://bibliotekanauki.pl/articles/484087.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN
    Tematy:
    funerary cones
    reused objects
    Padineith
    Asasif
    Theban necropolis
    Late Period Egypt
    Opis:
    This article is an Egyptological study of two funerary cones of the otherwise well known Theban official of the Twenty-sixth Dynasty, Padineith, majordomo of the Divine Consorts of Amun, who was buried in the tomb TT 197 on the Asasif cemetery. These two cones, however, were found in the structures of another Theban Tomb – MMA 1152 – turned into a hermitage by Christian monks – among objects, obviously brought back from peregrinations of these men all over through the Theban West Bank, most probably with intention to use them for some other secondary purpose.
    Źródło:
    Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences); 2014, 27; 195-199
    2084-6762
    2449-9579
    Pojawia się w:
    Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences)
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A reassessment of the Pennsylvanian lycophyte cone Triplosporite Brown
    Autorzy:
    Thomas, B. A.
    Bek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/138841.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Lepidostrobus
    Lycospora
    in situ spores
    Triplosporite
    Cones
    Carboniferous
    zarodniki
    szyszka
    karbon
    Opis:
    The type collection of the lycopsid cone species Triplosporite brownii Unger was re-examined to assess its in situ spores. The cones are monosporangiate with only microspores that possess both cingulum and zona. They equate to the dispersed miospore genus Lycospora and would be identified as Lycospora cf. pseudoannulata. Therefore, the genus Triplosporite Brown is shown to be a junior synonym to Lepidostrobus and a species emendation is given. A comparison is given with the other Lepidostrobus cones which yielded similar in situ microspores of the Lycospora pellucida Group.
    Źródło:
    Acta Geologica Polonica; 2014, 64, 2; 139-145
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of thinning on Pinus pinea L. development and physico-chemical soil characteristics in northwestern Tunisia: modeling of radial growth under thinning intensity
    Autorzy:
    Jaouadi, W.
    Mechergui, K.
    Riahi, M.A.
    Khouja, M.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077939.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Pinion pine
    silviculture
    thinning intensity
    stem volume
    radial growth
    cones production
    Opis:
    In this study, the potential beneficial impacts that the thinnings intensity on stand behavior and soil properties are also studied. This study was designed to test the hypothesis that thinning to various stand densities at young age enhance productivity of wood, cones and the physicochemical characteristics of the soil in Pinus pinea stands. We based our study on four thinning intensity (30, 40, 50 and 65%) in comparison with the control plot. The study was supplemented by a haracterization of radial growth of trees under the four thinning intensity. It was based on a complete randomized experimental field installed in 1994 in Tabarka forest, in Tunisia. For the radial growth analysis, three cores were taken from 125 trees at a rate of one tree per plot.The study showed that thinning has a significant effect on all dendrometric parameters. They revealed that a thinning intensity of 65% produces the best wood production (180.710 m3/ha), in annual growth in volume (4.634 m3/ha/year) and cone production (1211 cones/ha) compared to other thinning and control plot. Associated vegetation was also influenced by thinning intensities. The physicochemical characteristics of the soil were improved by thinning compared with the control. Signif- icant radial growth thinning was recorde especially in a thinning of 65% intensity (increases of 3.5 to 6.1 mm/year) compared to the control (1.1 to 2 mm/year). A strong relationship between radial growth and age was recorded at Thinning 4 (R2 = 0.923). These results can be used as an initial basis to refine silvicul- ture of pinion pine in order to improve stand productivity in Tunisia in wood and especially in cones given their importance on the world market.
    Źródło:
    Dendrobiology; 2018, 80; 70-80
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Synthesis and Modification of Conical Ni Structures by One-Step Method
    Autorzy:
    Skibińska, K.
    Semeniuk, S.
    Kutyła, D.
    Kołczyk-Siedlecka, K.
    Jędraczka, A.
    Żabiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049399.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrodeposition
    one-step method
    crystal modifier
    nickel cones
    free-standing structures
    Opis:
    In this work the conical Ni structures were obtained from an electrolyte containing NH4Cl as a crystal modifier. This process is called one-step method and allows to cover large areas with micro- and nanostructures during a single electrodeposition. Presence of NH4Cl promotes a vertical direction of structure growth in order to block a horizontal one. Additionally, this method does not require using chromic acid solution, which is dangerous for the environment. Due to the ferromagnetic properties of Ni, obtained coatings could be applied as magnetic devices. The influence of the parameters such as a preparation of copper substrate, a composition of electrolyte and electrodeposition conditions (time, the electrolyte temperature and current density) was investigated in this work.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 861-869
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On localizing global Pareto solutions in a given convex set
    Autorzy:
    Drwalewska, Agnieszka
    Gajek, Lesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1338686.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    sufficient and necessary conditions for optimality
    Pareto optimal solutions
    dual cones
    feasible directions
    Opis:
    Sufficient conditions are given for the global Pareto solution of the multicriterial optimization problem to be in a given convex subset of the domain. In the case of maximizing real valued-functions, the conditions are sufficient and necessary without any convexity type assumptions imposed on the function. In the case of linearly scalarized vector-valued functions the conditions are sufficient and necessary provided that both the function is concave and the scalarization is increasing with respect to the cone generating the preference relation.
    Źródło:
    Applicationes Mathematicae; 1999, 26, 4; 383-394
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimality conditions for a class of relaxed quasiconvex minimax problems
    Autorzy:
    Diem, H. T. H.
    Khanh, P. Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/205919.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    minimax problem
    optimality conditions
    convex sublevel sets
    normal cones
    star subdifferentials
    adjusted subdiffer- entials
    Opis:
    A class of minimax problems is considered. We approach it with the techniques of quasiconvex optimization, which includes most important nonsmooth and relaxed convex problems and has been intensively developed. Observing that there have been many contributions to various themes of minimax problems, but surprisingly very few on optimality conditions, the most traditional and developed topic in optimization, we establish both necessary and sufficient conditions for solutions and unique solutions. A main feature of this work is that the involved functions are relaxed quasi- convex in the sense that the sublevel sets need to be convex only at the considered point. We use star subdifferentials, which are slightly bigger than other subdifferentials applied in many existing results for minimization problems, but may be empty or too small in various situations. Hence, when applied to the special case of minimization problems, our results may be more suitable. Many examples are provided to illustrate the applications of the results and also to discuss the imposed assumptions.
    Źródło:
    Control and Cybernetics; 2014, 43, 2; 249-260
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of selected supercritical CO2 plant extract addition on user properties of shower gels
    Autorzy:
    Vogt, Otmar
    Sikora, Elżbieta
    Ogonowski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/778999.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    supercritical CO2 extract
    black currant seeds
    strawberry seeds
    hop cones
    mint leafs
    shower gel
    Opis:
    The formulations of washing cosmetics i.e. shower gels, containing extracts obtained during supercritical CO2 extraction process as active ingredient, were developed. The subject of the study was the analysis of the physicochemical and user properties of the obtained products. In the work supercritical CO2 extracts of black currant seeds, strawberry seeds, hop cones and mint leafs were used. The formulation contains a mixture of surfactants (disodium cocoamphodiacetate, disodium laureth sulfosuccinate, cocoamide DEA, cocoamidepropyl betaine, Sodium Laureth Sulfate). Various thickener agents were applied to the obtained desired rheological properties of the cosmetics. Among others, sorbitol acetal derivatives, methylhydroxypropylcellulose and C10-30 alkyl acrylate crosspolymer were used. For stable products, the effect of extracts addition (black currants seeds, strawberries seeds, mint and hops, obtained from supercritical CO2 extraction process) on the cosmetics properties, such as pH, viscosity, detergency and foam ability, were determined. The obtained results showed that the extracts could be used as components of shower gels.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 4; 51-54
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie morfologiczne szyszek daglezji zielonej (Pseudotsuga menziesii [Mirb.] Franco) w Polsce
    Morphological differentiation of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) cones in Poland
    Autorzy:
    Klimko, M.
    Zygmunt, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1035852.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szyszki
    Pseudotsuga menziesii
    botanika lesna
    daglezja zielona
    lesnictwo
    zroznicowanie morfologiczne
    drzewa lesne
    pseudotsuga menziesii
    variability
    cones
    Opis:
    The paper presents results of studies on population variability of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) cones. The studies were based on statistical analysis of cone morphological characteristics, seed scales and bract of populations originating from 12 sites. The analysis proved morphological variability of cones and scales. They did not show geographical variation and did not clearly confirm their demographic variation. The edaphic conditions and genetic diversity were found to affect the demonstrated variability.
    Źródło:
    Sylwan; 2003, 147, 10; 54-65
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dendrochronologiczna analiza przyrostów rocznych świerka pospolitego (Picea abies (L.) Karsten) poza naturalnym zasięgiem a cechy biometryczne szyszek
    Dendrochronological analysis of annual increments of Norway spruce [Picea abies [L.] Karsten] outside its natural range in comparison to biometric features of the cones
    Autorzy:
    Koprowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013533.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szyszki
    dendrochronologia
    cechy biometryczne
    Picea abies
    lesnictwo
    przyrosty roczne
    swierk pospolity
    drzewa lesne
    dendrochronology
    norway spruce
    cones
    statistical analysis
    Opis:
    Dendrochronological analysis and measurements of selected features of the cones allowed to describe the influence of the over−regional factors and the origin of trees on the increment pattern of Norway spruce growing in north−western Poland outside its natural range. Trees from study sites in the Świerczyna Forest District that is located farther southwards than the others characterise different course of tree growth. One of these sites stands out from the analysed group in terms of biometric features of the cones. The origin of the trees seems to decide on the spatial distribution of the increment pattern in a little way.
    Źródło:
    Sylwan; 2008, 152, 03; 50-57
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative quantitative study on phytochemical contents of hops (Humulus lupulus L.)
    Chmiel (Humulus lupulus l.) jako surowiec o właściwościach prozdrowotnych - zawartość fitozwiązków w wybranych odmianach chmielu
    Autorzy:
    Telichowska, Aleksandra
    Kobus-Cisowska, Joanna
    Stachowiak, Barbara
    Byczkiewicz, Szymon
    Zawadzka, Agnieszka
    Szulc, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1685740.pdf
    Data publikacji:
    2020-12-30
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    hops
    hop cones
    bioactive compounds
    polyphenolic acids
    chlorophyll
    carotenoids
    proanthocyanidis
    chmiel
    szyszki chmielowe
    związki bioaktywne
    polifenolokwasy
    chlorofil
    karotenoidy
    proantocyjanidyny
    Opis:
    Hop cones (Humulus lupulus L.) are mainly used as the main flavoring ingredient in beer production. Cones contain ac-tive compounds that determine not only the aromatic characteristic, but also functional properties. The aim of this study was to determine the basic anatomical characteristics of hops of the following varieties: Marynka, Lubelski, Magnum, and the assessment of the content of selected phytochemicals in water extracts. The different level of the content of chlorophyll depending on the cultivar studied was shown. The cones of the Marynka variety (0.49 mg/g) had the highest content of to-tal chlorophylls. All tested hop cone extracts showed a similar content of carotenoid pigments. The highest amount of pol-yphenolic acids was found in extracts prepared from the Lubelski variety cones (5.22 mg chlorogenic acid/g), and the lowest in the cones of Marynka variety (3.36 mg chlorogenic acid/g). Based on the research, it was shown that hop cones can be a good raw material for the production of water extracts due to the high content of biologically active compounds. Hop cones can be a raw material for the production of functional food.
    Szyszki chmielowe (Humulus lupulus L.) wykorzystywane są głównie jako podstawowy składnik aromatyzujący w produkcji piwa. Zawierają one bowiem związki aktywne, które decydują nie tylko o walorach organoleptycznych, ale także o właściwościach prozdrowotnych. Celem niniejszej pracy była podstawowa charakterystyka towaroznawcza szyszek chmielu odmian Marynka, Lubelski i Magnum, a także ocena zawartości wybranych fitozwiązków w wodnych ekstraktach z szyszek. Wykazano zróżnicowanie zawartości chlorofilu w zależności od badanej odmiany. Najwyższą zawartością sumy chlorofili charakteryzowały się ekstrakty z szyszek odmiany Marynka (0,49 mg/g). Wszystkie badane ekstrakty z szyszek chmielowych wykazały podobną zawartość barwników karotenoidowych. Polifenolokwasy w największej ilości znajdowały się w ekstraktach sporządzonych z szyszek odmiany Lubelski (5,22 mg kwasu chlorogenowego/g), a w najmniejszej w szyszkach odmiany Marynka (3,36 mg kwasu chlorogenowego/g). Na podstawie wykonanych badań wykazano, że szyszki chmielu mogą stanowić dobry surowiec do wytwarzania ekstraktów wodnych z uwagi na wysoką zawartość związków bio-logicznie aktywnych. Szyszki chmielu mogą stanowić również surowiec do produkcji żywności funkcjonalnej.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2020, 65, 2; 18-23
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Equivalence of second order optimality conditions for bang-bang control problems. Part 2 : Proofs, variational derivatives and representations
    Autorzy:
    Osmolovskii, N. P.
    Maurer, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/969736.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    bang-bang control
    second order necessary and sufficient conditions
    critical cones
    equivalence of quadratic forms
    representation of the Hessian of the Lagrangian
    Opis:
    In Part 1 of this paper (Osmolovskii and Maurer, 2005), we have summarized the main results on the equivalence of two quadratic forms from which second order necessary and sufficient conditions can be derived for optimal bang-bang control problems. Here, in Part 2, we give detailed proofs and elaborate explicit relations between Lagrange multipliers and elements of the critical cones in both approaches. The main analysis concerns the derivation of formulas for the first and second order derivatives of trajectories with respect to variations of switching times, initial and final time and initial point. This leads to explicit representations of the second order derivatives of the Lagrangian for the induced optimization problem. Based on a suitable transformation, we obtain the elements of the Hessian of the Lagrangian in a form which involves only first order variations of the nominal trajectory. Finally, a careful regrouping of all terms allows us to find the desired equivalence of the two quadratic forms.
    Źródło:
    Control and Cybernetics; 2007, 36, 1; 5-45
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ owadów na zdrowotność nasion jodły pospolitej (Abies alba Mill.) na przykładzie Nadleśnictwa Łosie (RDLP w Krakowie)
    Impact of insects on health of fir (Abies alba Mill.) seeds exemplified by the Forest District Łosie (the Kraków Forest Region)
    Autorzy:
    Skrzypczyńska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023993.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    jodla pospolita
    owady
    zdrowotnosc nasion
    szkodniki nasion
    nasiona
    RDLP Krakow
    Abies alba
    lesnictwo
    Nadlesnictwo Losie
    drzewa lesne
    insects
    abies alba
    cones seed losses
    Opis:
    The paper contains results of the study concerning infestation of cones of fir Abies alba Mill. by insects. They were represented by conophages: Barbara herrichiana Obr. (Lepidoptera: Tortricidae), Dioryctria abietella (Fabr.) (Lepidoptera: Pyralidae) and Earomyia impossibile Morge (Diptera: Lonchaeidae), and seminiphages: Megastigmus suspectus Borr. (Hymenoptera: Torymidae) and Resseliella piceae Seitn. (Diptera: Cecidomyiidae). The cones were collected in the Forest District Łosie (the Kraków Forest Region) in 1999, 2000 and 2003.
    Źródło:
    Sylwan; 2004, 148, 09; 29-33
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convex-like inequality, homogeneity, subadditivity, and a characterization of $L^p$-norm
    Autorzy:
    Matkowski, Janusz
    Pycia, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/1311612.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    functional inequality
    subadditive functions
    homogeneous functions
    Banach functionals
    convex functions
    linear space
    cones
    measure space
    integrable step functions
    $L^p$-norm
    Minkowski's inequality
    Opis:
    Let a and b be fixed real numbers such that 0 < min{a,b} < 1 < a + b. We prove that every function f:(0,∞) → ℝ satisfying f(as + bt) ≤ af(s) + bf(t), s,t > 0, and such that $limsup_{t → 0+} f(t) ≤ 0$ must be of the form f(t) = f(1)t, t > 0. This improves an earlier result in [5] where, in particular, f is assumed to be nonnegative. Some generalizations for functions defined on cones in linear spaces are given. We apply these results to give a new characterization of the $L^p$-norm.
    Źródło:
    Annales Polonici Mathematici; 1994-1995, 60, 3; 221-230
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planes tangent simultaneously to three spheres
    Płaszczyzny jednocześnie styczne do trzech kul
    Autorzy:
    Łapińska, C.
    Ogorzałek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/119052.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Geometrii i Grafiki Inżynierskiej
    Tematy:
    common tangents to two circles
    axis
    vertex angle of cone
    planes tangent to cones
    cone circumscribed on sphere
    wspólne styczne do dwóch okręgów
    oś
    kąt wierzchołkowy stożka
    płaszczyzny styczne do stożków
    stożek opisany na kuli
    Opis:
    The authors show in simple steps how to reduce the problem of determing planes simultaneously tangent to three spheres for easier construction of tangent planes at the same time to two cones. The method presented here is of great educational importance: it develops spatial thinking by combining different types of surfaces (sphere and cones) an d shows how to use previously known properties to analyze new problems.
    Autorki pokazują w kolejnych krokach jak sprowadzić problem wyznaczania płaszczyzn stycznych jednocześnie do trzech danych kul do łatwiejszej konstrukcji płaszczyzn jednocześnie stycznych do dwóch stożków. Prezentowana metoda ma duże walory dydaktyczne: rozwija myślenie przestrzenne analizując związki pomiędzy różnymi rodzajami powierzchni (łącząc stożki i kule) oraz pokazuje, jak w analizie nowego problemu wykorzystać własności poznane wcześniej.
    Źródło:
    Journal Biuletyn of Polish Society for Geometry and Engineering Graphics; 2017, 30; 33-39
    1644-9363
    Pojawia się w:
    Journal Biuletyn of Polish Society for Geometry and Engineering Graphics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards historical roots of necessary conditions of optimality: Regula of Peano
    Autorzy:
    Dolecki, S.
    Greco, G. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/970285.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    różniczkowalność
    zbiór wypukły
    differentiability
    convex set
    Kuratowski limit of sets
    tangent cones
    condition of optimality
    mean value theorem
    Peano remainder
    Peano's regula
    strict derivability
    Peano's Formulario Mathematico
    Peano's Geometric Calculus
    Grassmann's Ausdehnungslehre
    Opis:
    At the end of 19th century Peano discerned vector spaces, differentiability, convex sets, limits of families of sets, tangent cones, and many other concepts, in a modern perfect form. He applied these notions to solve numerous problems. The theorem on necessary conditions of optimality (Regula) is one of these. The formal language of logic that he developed, enabled him to perceive mathematics with great precision and depth. Actually he built mathematics axiomatically based exclusively on logical and set-theoretic primitive terms and properties, which was a revolutionary turning point in the development of mathematics.
    Źródło:
    Control and Cybernetics; 2007, 36, 3; 491-518
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Owady uszkadzające szyszki i nasiona jodły pospolitej Abies alba Mill. w wybranych drzewostanach Puszczy Solskiej
    Insects damaging cones and seeds of silver fir Abies alba Mill. in the selected stands of the Solska Forest
    Autorzy:
    Skrzypczyńska, M.
    Lipiński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009054.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Solska
    drzewa lesne
    jodla pospolita
    Abies alba
    szkodniki szyszek
    szkodniki nasion
    barbarowka jodloweczka
    Barbara herrichiana
    szyszen pospolity
    Dioryctria abietella
    chylka jodlowka
    Earomyia impossible
    reseliowka jodlowka
    Resseliella piceae
    znamionek jodlowiec
    Megastigmus suspectus
    damage insects
    abies alba
    cones
    seeds
    Opis:
    Paper presents results of the study on infestation of cones of Abies alba Mill. by insects. They were represented by conophages: Barbara herrichiana Obr. (Lepidoptera: Tortricidae), Dioryctria abietella (Den. et Schiff.) (Lepidoptera: Pyralidae) and Earomyia impossibile Morge (Diptera: Lonchaeidae) as well as seminiphages: Megastigmus suspectus Borr. (Hymenoptera: Torymidae) and Resseliella piceae Seitn. (Diptera: Cecidomyiidae). The cones were collected in the Solska Forest in years 2007−2008.
    Źródło:
    Sylwan; 2010, 154, 10; 676-683
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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