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Wyświetlanie 1-10 z 193
Tytuł:
Prognostic Crown Diameter equations for a Mixed Species Plantation in Southern Nigeria
Autorzy:
Buochuama, A.
Oyebade, B. A.
Powiązania:
https://bibliotekanauki.pl/articles/1113007.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
crown
crown diameter
mixed species plantation
model
Opis:
The dimension of a tree crown has an apparent effect on and is strongly linked with the growth of the tree and its diverse parts. Crown information is an important part of numerous growth and yield models. Hence, empirical predictive equations for crown diameter of a mixed species plantation in Southern Nigeria were developed and evaluated in this study. In studying this phenomenon, total enumeration of the selected species in the mixed species plantation was carried out. Moreover, major growth attributes of 185 trees of six species, namely; Khaya ivorensis, Entandrophragma angolense, Terminalia ivorensis, Tectona grandis, Treculia africana and Mansonia altissima were measured and estimated using mensurational methods. Descriptive, correlation, regression and residual analyses were then applied to the quantitative data obtained from the mixed species plantation. For all the species, the best adjudged model with the best fit indices was Ln(cd) = Ln(b0) + b1·CPA·dbh, R2 = 0.936, SEE = 0.037; an indication of parsimonious potential of a predictive exponential model. This paper, therefore, revealed the possibilities of predicting crown diameter for a mixed species plantation in Nigeria with ample prospects for sustainable planning and management decisions that are relevant for any mixed species plantation.
Źródło:
World News of Natural Sciences; 2018, 16; 117-129
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cykliczne tia- i oksatiaetery o prostej budowie chemicznej
Cyclic thia-and oxathiaethers with simple chemical structure
Autorzy:
Kuś, Piotr
Hellwig, Hubert
Powiązania:
https://bibliotekanauki.pl/articles/1409942.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
tiaetery koronowe
oksatiaetery koronowe
thia-crown-ethers
oxathia-crown-ethers
Opis:
Cyclic thiaethers and oxathiaethers, more often found in the chemical literature as sulfur or sulfur-oxygen analogs of crown ethers (and appearing most often under such names), are an interesting group of organic compounds with large complexing potential, and hence - their application possibilities. However, they are not common research object. This may be due to the fact that many of these compounds are obtained with rather low yields, and moreover, compounds with harmful and dangerous effects on living organisms are sometimes used in their synthesis. Methylene-sulfur cyclic derivatives were very often obtained as random products on the occasion of the preparation of other compounds. Similarly, their complexes have not been presented in large numbers in the chemical literature. The next two groups of compounds: ethylene-sulfur and ethylene-oxysulfur cyclic derivatives are much more frequent and more numerous in the literature. This may be due to the fact that these compounds are similar in structure to the very well-known oxygen crown ethers. All the compounds discussed here have potential possibility and form complexes with a wide variety of metal ions - from alkali to lanthanoid ions. They also form bimetallic complexes, as well as the so-called coordination polymers. The type of complex formed and the central ion with which the complex is formed depends on the type of ligand used for its synthesis. The article presents the current state of knowledge about these dependencies. Attempts to use complexes of these compounds in microelectronics, phototherapy or photodiagnostics, photography and solid phase separation of ions were also presented.
Źródło:
Wiadomości Chemiczne; 2021, 75, 5-6; 653-674
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ksztaltowanie z wiekiem dlugosci korony olszy czarnej [Alnus glutinosa [L.]Gaertn.]
Autorzy:
Dmyterko, E.
Powiązania:
https://bibliotekanauki.pl/articles/973050.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
wiek drzew
olsza czarna
Alnus glutinosa
drzewa lesne
względna długość korony
leśnictwo
długość korony
długość absolutna
absolute crown length
relative crown length
primary crown
secondary crown
Opis:
The paper provides research results concerning the relationship between age, absolute height and relative crown length of black alder. Analysis of the ratio of relative crown length to tree height of black alder trees allowed to develop a crown length model. Alder is capable of producing a secondary crown, which entails the shortening of the non−branched section of the trunk. A relationship has been found between the length of the primary crown and the length of the secondary crown depending on elongation of the secondary crown at the cost of shortening of the primary crown.
Źródło:
Sylwan; 2003, 147, 11; 47-53
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crowdsourcing – what it is, works and why it involves so many people?
Autorzy:
Świeszczak, Marika
Świeszczak, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1189007.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
crowdsourcing
crown
task
definitione
Web
Opis:
Crowdsourcing is a recent concept, very popular in companies’ practice and literature. In literature there are many definitions of this concept, but some of them are inconsistent and incomplete. In this paper, existing definitions of crowdsourcing are analyzed to extract common elements and to establish the basic characteristics of any crowdsourcing initiative. Based on these existing definitions, an exhaustive and consistent definition for crowdsourcing is presented and contrasted in thirty two cases.
Źródło:
World Scientific News; 2016, 48; 32-40
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimum Coverings of Crowns with Cycles and Stars
Autorzy:
Lin, Jenq-Jong
Jou, Min-Jen
Powiązania:
https://bibliotekanauki.pl/articles/32361751.pdf
Data publikacji:
2022-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
cycle
star
covering
decomposition
crown
Opis:
Let F, G and H be graphs. A (G, H)-decomposition of F is a partition of the edge set of F into copies of G and copies of H with at least one copy of G and at least one copy of H. For R ⊆ F, a (G, H)-covering of F with padding R is a (G, H)-decomposition of F + E(R). A (G, H)-covering of F with the smallest cardinality is a minimum (G, H)-covering. This paper gives the solution of finding the minimum (Ck, Sk)-covering of the crown Cn,n−1.
Źródło:
Discussiones Mathematicae Graph Theory; 2022, 42, 1; 81-88
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zdobienie ksiąg metryki koronnej za czasów kanclerstwa Jerzego Ossolińskiego
Ornamentation of Crown Metrica books during the chancellorship of Jerzy Ossoliński
Autorzy:
Górny, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/1076650.pdf
Data publikacji:
2019
Wydawca:
Archiwum Główne Akt Dawnych
Tematy:
Metryka Koronna
Jerzy Ossoliński
kancelaria koronna
propaganda polityczna
Crown Metrica
crown chancery
political propaganda
Opis:
Since mid-17th century a new practice can be observed, concerning ornamentation of title pages of the books of inscription of the Crown. Two such ornamented sheets remain from the time when Jerzy Ossoliński held the office of the chancellor. The extant sheets complement the Chancellor’s political agenda, presented in his thanksgiving speeches, delivered upon receiving the seal. This is an example of using the crown chancery to promote political ideas. Additionally, this practice is aligned with the belief that the image is inextricably linked with the text; at the same time, it is a manifestation of Ossoliński’s ambition and hubris
Źródło:
Miscellanea Historico-Archivistica; 2019, 26; 27-34
0860-1054
Pojawia się w:
Miscellanea Historico-Archivistica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of benzene moiety fused with macrocyclic ring on the proton affinity of crown ethers studied in MS/MS experiment
Autorzy:
Frański, R.
Gierczyk, B.
Powiązania:
https://bibliotekanauki.pl/articles/346947.pdf
Data publikacji:
2008
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
crown ethers
proton affinity
mass spectrometry
Opis:
In this paper we address the question how the presence of an aromatic moiety affects the proton affinity of crown ethers. In order to compare the proton affinities of crown ethers studied (M), we compared the abundances of protonated crown ethers ([M + H]+ ions) with the abundance of the ion [NH2-B15C5 + H]+ (formally also protonated crown ether). Both [M + H]+ and [NH2-B15C5 + H]+ were formed as a result of decomposition of [NH2-B15C5 + H + M]+. The presence of a benzene moiety fused with a macrocyclic ring strongly decreases the ratio [M + H]+/[NH2-B15C5 + H]+. Thus, the higher ring strain caused by the benzene moiety leads to a substantial lowering of the proton affinity of crown ethers. It is also suggested that for protonated benzocrown ethers the ring strain is partly compensated by the proton-đ interaction. The presence of an NO2 group decreases the electron density on the aromatic ring and, consequently, the proton-đ interaction is suppressed. As expected, the proton affinity of benzo-crown ethers increases with increasing size of their cavity since the ring strain is lower for larger molecules. An unexpectedly high proton affinity of dicyclohexano-18-crown-6 (DC18C6) has been observed.
Źródło:
Ars Separatoria Acta; 2008, 6; 61-68
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Документ і влада на Галицькій Русі пізнього середньовіччя (У зв’язку з монографією Sven Jaros, Integrationen im Grenzraum. Akteure und Felder multikonfessioneller Herrschaftsaushandlung in Kronruthenien (1340–1434), Berlin–Boston 2021 [Europa im Mittelalter, Bd. 41])
Document and Power in Late Medieval Halych Rus’ (Review: Sven Jaros, Integrationen im Grenzraum. Akteure und Felder multikonfessioneller Herrschaftsaushandlung in Kronruthenien (1340–1434), Berlin–Boston 2021 [Europa im Mittelalter, Bd. 41])
Autorzy:
Зазуляк, Юрій
Powiązania:
https://bibliotekanauki.pl/articles/28713770.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Gdański. Wydawnictwo Uniwersytetu Gdańskiego
Tematy:
Rus’
Crown Rus’
nobility
charters
donation policy
Opis:
The article provides an overview of the recent book written by the German historian Sven Jaros which examines the history of the political process, local elites, and the documentary culture in Halych Rus’ (Red Ruthenia) during the period of the 1340s – 1430s. The book offers a new interpretation of the power relations and the formation of the local elites in the region with a focus on the detailed analysis of the charters issued by the rulers from the Piast, Anjou, and Jagiellon dynasties, as well as by their governors for the local noblemen, townsmen, and commoners. In his analysis Jaros discusses the composition of the groups of the recipients of charters according to their ethnic, social, and geographic origin. The analysis continues with an examination of the mobility of the rulers, governors, and recipients. It seeks to trace the connections between the geographies of the issue of a charter, the property granted, and the residence of the recipients. The book contains short excursions on the beginnings of the Latin Church and the state of the Orthodox Churches in Crown Rus’ under the rule of Casimir III, the Great, as well as on the practices of cura animarum in the region. Jaros concludes that the continuity and changes in the forms of local political communication and the political order, as reflected in the rulers’ charters for Crown Rus’, determined the political and institutional space for the formation of the local nobility as a supra-ethnic and supra-confessional community. The second part of the book consists of a register (repertorium) of all known charters and their deperdita issued for the region’s recipients by the rulers and their governors during the given period. The register is accompanied by observations on the main characteristics of the available corpus of diplomas and charters for the history of Galicia, which highlights the institutional means of their preservation, the correlation between the surviving originals and copies, the mentions of lost documents, etc. The review also offers alternative explanations of some problems raised in the book, such as how some local knightly clans were formed, or the nature of military service and property rights in the lands of Halych Rus’ and its relations to the written documents issued to confirm such rights.
Źródło:
Studia z Dziejów Średniowiecza; 2023, 26; 423-438
2544-2562
Pojawia się w:
Studia z Dziejów Średniowiecza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kancelaria koronna w świetle ksiąg wpisów za Władysława IV
Crown chancery in light of books of inscription during Ladislaus IV reign
Autorzy:
Dąbrowski, Janusz S.
Powiązania:
https://bibliotekanauki.pl/articles/1076646.pdf
Data publikacji:
2019
Wydawca:
Archiwum Główne Akt Dawnych
Tematy:
Władysław IV Waza
Korona
kancelaria koronna
Metryka Koronna
księgi wpisów
Ladislaus IV Vasa the king of Poland (1633–1648)
Crown (Polish)
crown chancery
Crown Metrica (Metrica Regni)
inscription books
Opis:
The paper presents preliminary results of research on the crown chancery of Ladislaus IV Vasa based on 12 books of inscription of the Crown Metrica (Metrica Regni), which reflect one particular aspect of the chancery’s work, namely recording the acts issued by the Office of the King. The offices of chancellor and deputy chancellor were held consecutively by six persons, most prominently by J. Zadzik, P. Gembicki, and J. Ossoliński. The chanceries had retained their modus operandi since the reign of Sigismund III. Every new deputy chancellor took staff members over from the departing chancellor. With time, small groups of royal secretaries in the chanceries grew in importance, the volume of recorded documents decreased, and more documents were made in Polish (14%) as compared to the dominant Latin. Anyway, throughout the reign of Ladislaus IV the chancery created a total of 70000 documents, being most active during the Diet’s sessions
Źródło:
Miscellanea Historico-Archivistica; 2019, 26; 9-16
0860-1054
Pojawia się w:
Miscellanea Historico-Archivistica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strażnicy koronny i wojskowy w dobie Jana Sobieskiego (1667–1696). Kilka uwag o osobach odpowiedzialnych za organizowanie przemarszów armii koronnej
Offices of Grand and Field Guardian in Jan Sobieski period (1667–1696). A few remakes about persons who organised the Crown Army marches
Autorzy:
Hundert, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/688677.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
strażnik wielki koronny
strażnik wojskowy koronny
Jan III Sobieski
armia koronna 1667–1696
Grant Crown Guardian
Field Crown Guardian
king Jan III Sobieski
the Crown Army 1667–1696
Opis:
Offices of Grand and Field Guardian (strażnik wielki and strażnik polny) existed in Polish army since 16th century. Since first half of the 17th century they also have their equivalent in Lithuanian army. One of the main role of such officers was to take care of security of the marching army. During Sobieski’s time (as hetman and then king) this office was held by very experienced and well respected officers, who at the same time were politically connected to Sobieski. Politics could also affect and limit the role, as it happened with Grand Crown Guardian Stefan Bidziński after 1683, when he was in open conflict with Grand Crown Hetman Stanisław Jan Jabłonowski.
Urzędy strażnika wielkiego i wojskowego (polnego) w wojsku koronnym istniały od XVI w. Od pierwszej połowy XVII w. miały one także swoje odpowiedniki w armii Wielkiego Księstwa Litewskiego. Jednym z głównych zadań osób sprawujących te stanowiska było ubezpieczanie maszerujących armii. W czasach Sobieskiego urzędy strażników pełniły osoby o dużym doświadczeniu wojskowym i autorytecie w armii, ale także osoby zależne politycznie od osoby hetmana, a później króla Jana Sobieskiego. Od czynnika politycznego zależne było także ograniczenie prerogatyw strażnika wielkiego Stefana Bidzińskiego po 1683 r., albowiem znajdował się on w otwartym konflikcie z ówczesnym hetmanem wielkim koronnym Stanisławem Janem Jabłonowskim.
Źródło:
Acta Universitatis Lodziensis. Folia Historica; 2017, 99; 149-170
0208-6050
2450-6990
Pojawia się w:
Acta Universitatis Lodziensis. Folia Historica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 193

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