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Tytuł:
4-Transitive Digraphs I: The Structure of Strong 4-Transitive Digraphs
Autorzy:
Hernández-Cruz, César
Powiązania:
https://bibliotekanauki.pl/articles/30146649.pdf
Data publikacji:
2013-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
digraph
transitive digraph
quasi-transitive digraph
4-transitive digraph
k-transitive digraph
k-quasi-transitive digraph
Opis:
Let D be a digraph, V (D) and A(D) will denote the sets of vertices and arcs of D, respectively. A digraph D is transitive if for every three distinct vertices u, v,w ∈ V (D), (u, v), (v,w) ∈ A(D) implies that (u,w) ∈ A(D). This concept can be generalized as follows: A digraph is k-transitive if for every u, v ∈ V (D), the existence of a uv-directed path of length k in D implies that (u, v) ∈ A(D). A very useful structural characterization of transitive digraphs has been known for a long time, and recently, 3-transitive digraphs have been characterized. In this work, some general structural results are proved for k-transitive digraphs with arbitrary k ≥ 2. Some of this results are used to characterize the family of 4-transitive digraphs. Also some of the general results remain valid for k-quasi-transitive digraphs considering an additional hypothesis. A conjecture on a structural property of k-transitive digraphs is proposed.
Źródło:
Discussiones Mathematicae Graph Theory; 2013, 33, 2; 247-260
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arbitrarily Partitionable {2K2, C4}-Free Graphs
Autorzy:
Liu, Fengxia
Wu, Baoyindureng
Meng, Jixiang
Powiązania:
https://bibliotekanauki.pl/articles/32361721.pdf
Data publikacji:
2022-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
arbitrarily partitionable graphs
arbitrarily vertex decomposable
threshold graphs
{2 K 2, C 4 }-free graphs
Opis:
A graph G = (V, E) of order n is said to be arbitrarily partitionable if for each sequence λ = (λ1, λ2, …, λp) of positive integers with λ1 + … +λp = n, there exists a partition (V1, V2, … , Vp) of the vertex set V such that Vi induces a connected subgraph of order λi in G for each i ∈ {1, 2, …, p}. In this paper, we show that a threshold graph is arbitrarily partitionable if and only if it admits a perfect matching or a near perfect matching. We also give a necessary and sufficient condition for a {2K2, C4}-free graph being arbitrarily partitionable, as an extension for a result of Broersma, Kratsch and Woeginger [Fully decomposable split graphs, European J. Combin. 34 (2013) 567–575] on split graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2022, 42, 2; 485-500
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of Al2O3/4H-SiC and Al2O3/SiO2/4H-SiC MOS structures
Autorzy:
Taube, A.
Guziewicz, M.
Kosiel, K.
Gołaszewska-Malec, K.
Król, K.
Kruszka, R.
Kamińska, E.
Piotrowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/953063.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum oxide
MOS
silicon carbide
4H-SiC
high-K dielectrics
tlenek glinu
węglik krzemu
dielektryki high-k
Opis:
The paper presents the results of characterization of MOS structures with aluminum oxide layer deposited by ALD method on silicon carbide substrates. The effect of the application of thin SiO2 buffer layer on the electrical properties of the MOS structures with Al2O3 layer has been examined. Critical electric field values at the level of 7.5–8 MV/cm were obtained. The use of 5 nm thick SiO2 buffer layer caused a decrease in the leakage current of the gate by more than two decade of magnitude. Evaluated density of trap states near the conduction band of silicon carbide in Al2O3/4H-SiC MOS is about of 1×1013 eV−1cm−2. In contrast, the density of the trap states in the Al2O3/SiO2/4H-SiC structure is lower about of one decade of magnitude i.e. 1×1012 eV−1cm−2. A remarkable change in the MOS structure is also a decrease of density of electron traps located deeply in the 4H-SiC conduction band below detection limit due to using of the SiO2 buffer layer.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 3; 537-551
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detecting abuses in archaeological areas using k-mean clustering analysis and UAVs/drones data
Autorzy:
Qubaa, Abdalrahman
Al-Hamdani, Saja
Powiązania:
https://bibliotekanauki.pl/articles/35525451.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
unmanned aerial vehicles
k-mean clustering
unsupervised classification
Pix4D
remote sensing
archaeological survey
Opis:
Unmanned aerial vehicles (UAVs) or drones have made great progress in aerial surveys to research and discover heritage sites and archaeological areas, particularly after having developed their technical capabilities to carry various sensors onboard, whether they are conventional cameras, multispectral cameras, and thermal sensors. The objective of this research is to use the drone technology and k-mean clustering algorithm for the first time in Nineveh Governorate in Iraq to reveal the extent of civil excesses and random construction, as well as the looting and theft that occur in the archaeological areas. DJI Phantom 4 Pro drone was used, in addition to using the specialized Pix4D program to process drone images and make mosaics for them. Multiple flights were performed using a drone to survey multiple locations throughout the area and compare them with satellite images during different years. Drone’s data classification was implemented using a k-means clustering algorithm. The results of the data classification for three different time periods indicated that the percentage of archaeological lands decreased from 90.31% in 2004 to 25.29% in 2018. Where the work revealed the extent of the archaeological area’s great violations. The study also emphasized the importance of directing authorities of local antiquities to ensure the use of drone’s technology to obtain statistical and methodological reports periodically to assess archaeological damage and to avoid overtaking, stolen and looted of these sites.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2021, 30, 1; 182-194
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dopuszczalność orzekania kary wolnościowej na podstawie art. 37a k.k. a instytucja występku o charakterze chuligańskim
Admissibility Rule of Libertarian Punishment on the Basis of Article 37a of the Criminal Code and the Institution of Vice Hooligan
Autorzy:
Bernal, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/596872.pdf
Data publikacji:
2016
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
art. 37a k.k.
art. 58 § 4 k.k.
ustawowe zagrożenie
dyrektywy wymiaru kary
zamiana kary pozbawienia wolności
Article 37a Criminal Code
Article 58 § 4 Criminal Code
statutory risk
directive sentencing
commutation of the sentence of imprisonmen
Opis:
W artykule omówiono problematykę dotyczącą możliwości zastosowania art. 37a k.k., przewidującego możliwość zamiany kary pozbawienia wolności na kary o charakterze wolnościowym, który obowiązuje od 1 lipca 2015 roku, w wypadku popełnienia występku o charakterze chuligańskim. Analizie poddano wprowadzony art. 37a k.k., a w szczególności kwestie dotyczące charakteru tego przepisu jako normy przednawiasowej wpływającej na zagrożenie ustawowe przepisów zrębowych. W konkluzji wskazano, że poprzez eliminację art. 58 § 4 k.k. i wprowadzanie art. 37a k.k. jest możliwe zastosowanie grzywny albo kary ograniczenia wolności w przypadku sprawców występków o charakterze chuligańskim.
The article discusses the issues concerning the applicability of Article 37a Criminal Code, providing the possibility of commutation of the sentence of imprisonment for a penalty to be libertarian, which came into force on 1 July 2015, in case of committing a transgression of a hooligan. A new Article 37a Criminal Code, and in particular the issues concerning the nature of that provision as a standard of “beforebracket” influencing the threat of statutory regulations of the framework. The conclusion was that by eliminating Article 58 § 4 Criminal Code and the introduction of Article 37a Criminal Code it is possible to use fines and penalties of restriction of liberty for perpetrators of crimes of a hooligan.
Źródło:
Studia Prawno-Ekonomiczne; 2016, XCIX; 11-27
0081-6841
Pojawia się w:
Studia Prawno-Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of MOSFETs with crystalline high-k gate-dielectrics: device simulation and experimental data
Autorzy:
Zaunert, F.
Endres, R.
Stefanov, Y.
Schwalke, U.
Powiązania:
https://bibliotekanauki.pl/articles/308785.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
crystalline high-k gate dielectric
rare-earth oxide
praseodymium oxide
gadolinium oxide
damascene metal gate
CMP
CMOS process
TSUPREM4
MEDICI
interface state density
carrier mobility
remote coulomb scattering
Opis:
The evaluation of the world's first MOSFETs with epitaxially-grown rare-earth high-k gate dielectrics is the main issue of this work. Electrical device characterization has been performed on MOSFETs with high-k gate oxides as well as their reference counterparts with silicon dioxide gate dielectric. In addition, by means of technology simulation with TSUPREM4, models of these devices are established. Current-voltage characteristics and parameter extraction on the simulated structures is conducted with the device simulator MEDICI. Measured and simulated device characteristics are presented and the impact of interface state and fixed charge densities is discussed. Device parameters of high-k devices fabricated with standard poly-silicon gate and replacement metal gate process are compared.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 2; 78-85
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FANET Drone’s 4K Data Applications, Mobility Models and Wi-Fi IEEE802.11n Standards
Autorzy:
QasMarrogy, Ghassan A.
Powiązania:
https://bibliotekanauki.pl/articles/1839466.pdf
Data publikacji:
2021
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
4K data transmission
FANET
mobility models
UAV
Opis:
With growing popularity of unmanned aerial vehicles (UAVs), the importance of flying ad-hoc networks (FANETs) is enhanced by such applications as 4K video recording, communications in search and rescue missions and goods deliveries, to name just a few. This, in turn, stimulates research on different topologies of networks existing between UAVs, with studies in this field being essential to improving performance of such networks. Several problems must be solved to effectively use UAVs in order to offer stable and reliable massive data transmission capabilities, taking into consideration quickly changing FANET topologies, types of routing, security issues, etc. In this paper, a comprehensive evaluation of FANETs used by UAVs is presented in terms of communication network challenges, data types, mobility models and standards applied in order to achieve best performance. The evaluation presented herein covers such areas as data throughput, retransmission attempts and delay.
Źródło:
Journal of Telecommunications and Information Technology; 2021, 1; 51-55
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FANET Drone’s 4K Data Applications, Mobility Models and Wi-Fi IEEE802.11n Standards
Autorzy:
QasMarrogy, Ghassan A.
Powiązania:
https://bibliotekanauki.pl/articles/1839485.pdf
Data publikacji:
2021
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
4K data transmission
FANET
mobility models
UAV
Opis:
With growing popularity of unmanned aerial vehicles (UAVs), the importance of flying ad-hoc networks (FANETs) is enhanced by such applications as 4K video recording, communications in search and rescue missions and goods deliveries, to name just a few. This, in turn, stimulates research on different topologies of networks existing between UAVs, with studies in this field being essential to improving performance of such networks. Several problems must be solved to effectively use UAVs in order to offer stable and reliable massive data transmission capabilities, taking into consideration quickly changing FANET topologies, types of routing, security issues, etc. In this paper, a comprehensive evaluation of FANETs used by UAVs is presented in terms of communication network challenges, data types, mobility models and standards applied in order to achieve best performance. The evaluation presented herein covers such areas as data throughput, retransmission attempts and delay.
Źródło:
Journal of Telecommunications and Information Technology; 2021, 1; 51-55
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
H3K4 histone methylation in oral squamous cell carcinoma
Autorzy:
Mancuso, Marta
Matassa, Danilo
Conte, Mariachiara
Colella, Giuseppe
Rana, Gina
Fucci, Laura
Piscopo, Marina
Powiązania:
https://bibliotekanauki.pl/articles/1040528.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
oral squamous carcinoma
histone methylation
H3K4
Opis:
Methylation of specific lysine residues in histone tails has been proposed to function as a stable epigenetic marker that directs biological functions altering chromatin structure. Recent findings have implicated alteration in heterochromatin formation as a contributing factor in cancer development. In order to verify whether changes in the overall level of H3K4 histone methylation could be involved in oral squamous carcinoma, the levels of H3K4me1, me2 and me3 were measured in oral squamous carcinoma, leukoplakias and normal tissues. The levels of H3K4me2 and me3 were significantly different in oral squamous cell carcinoma in comparison with normal tissue: the level of H3K4me2 was increased while that of H3K4me3 decreased. No significant differences could be found between the two types of tissues in the level of H3K4me1. A similar trend was found in the leukoplakias that appeared more like the pathological than normal tissue. These results support the idea that alteration of chromatin structure could contribute to oncogenic potential.
Źródło:
Acta Biochimica Polonica; 2009, 56, 3; 405-410
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low frequency of spontaneous rearrangements during plasmid incorporation in CHO-K1 mutant cells defective in DNA repair
Autorzy:
Kruszewski, M.
Kruszewska, H.
Mori, M.
Eguchi-Kasai, K.
Inaba, H.
Zakierska, I.
Hayata, I.
Powiązania:
https://bibliotekanauki.pl/articles/147124.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
CHO-K1
Pa13
Pb4
plasmid incorporation
xrs6
Opis:
pLrec plasmid DNA was introduced into Chinese hamster cell lines defective in DNA repair (Pa13, Pb4, xrs6) and the parental CHO-K1 cell line. Clones with stable integrated plasmid were isolated and integrity of the incorporated DNA was checked by Southern blotting and PCR. Intact pLrec plasmid was found in 11% of the isolated CHO-K1 clones. In contrast, intact plasmid copies were found in 68.8%, 50%, 35.7% clones of Pa13, Pb4 and xrs6 cell lines, respectively. We conclude that certain DNA repair defects may facilitate intact plasmid integration. The higher frequency of integration of the intact vector into the genome of cell lines defective in DNA repair as compared to the parental cell line points to two possibilities, not mutually exclusive: (1) these cells possess a mechanism that facilitates the process of plasmid incorporation and hence, plasmid DNA is incorporated into the genome before extrachromosomal recombination takes place; (2) the vector is inserted into a less recombination prone site in the genome.
Źródło:
Nukleonika; 2002, 47, 1; 7-11
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular dynamics simulation of histone H3 and H4 N-terminal tail conformation in the presence and absence of nucleosome core
Autorzy:
Zhang, R.
Erler, J.
Langowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1954427.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska
Tematy:
histone tail
REMD
H4K 16 acetylation
nucleosome
Opis:
Histone N (C)-terminal tails play an important role in chromatin remodeling and gene regulation. Posttranslational modifications (PTMs) of histone tails are known to be correlated to distinct states of gene activity, but the molecular mechanism of these processes is largely unknown. PTMs alter the electrostatic environment and conformation of histone tails, as w ell as their interaction with other components. Here we performed extensive Replica Exchange Molecular Dynamics (REMD) simulations for the H4 and H3 tails, isolated and with inclusion of a nucleosome. Our results agree with the predictions of previous the teoretical studies for the secondary structure of isolated tails, but show strong dependence on the force field used. In the presence of the nucleosome, the secondary structure of histone tails is destabilized. Furthermore, H4K16 is found to insert into the DNA minor groove, whereas the acetylated H4K16 stays on the surface of DNA .
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2014, 18, 3; 281--288
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mundur i medycyna
Autorzy:
Stępniak, Roman.
Data publikacji:
2000
Wydawca:
Warszawa : nakł. aut.
Tematy:
Dzierżykray-Rogalski, Tadeusz "Mściwoj"
Stępień, Jan "Szymon"
Szopiński, Jan "Szopa"
Stawiński, Jerzy S. "Łącki"
Armia Krajowa. Okręg Warszawa. Obwód V Warszawa-Mokotów. Pułk "Baszta". Batalion "Karpaty". Kompania K-4 łączność pamiętniki
Węgrzy 1944 r. pamiętniki
Opis:
Wspomnienia żołnierza Kompanii Łączności pułku "Baszta" AK: nawiązanie kontaktu z Węgrami stacjonującymi w Zalesiu w pobliżu Lasów Chojnowskich.
S. 23-26, Węgrzy.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Mundur i medycyna
Autorzy:
Stępniak, Roman.
Data publikacji:
2000
Wydawca:
Warszawa : nakł. aut.
Tematy:
Stawiński, Jerzy S. "Łącki"
Armia Krajowa. Okręg Warszawa. Obwód V Warszawa-Mokotów. Pułk "Baszta". Batalion "Karpaty". Kompania K-4 łączność pamiętniki
Powstanie warszawskie (1944)
Łączność
Pamiętniki i wspomnienia
Opis:
Wspomnienia z Kompanii Łączności (K-4) pułku "Baszta" AK.
S. 18-48, Czas Powstania.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Odbieraki prądu stosowane na europejskiej sieci kolejowej
Current collectors used in European railway network
Autorzy:
Kaniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/253787.pdf
Data publikacji:
2004
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
Dyrektywa 96/48 [4]
europejska sieć kolejowa
firma Faiveley
firma Stemmann-Technik GmbH
norma EN 50206-1 [1]
norma PN-K-91001 [2]
odbierak prądu
pantograf
Opis:
System zasilania energią elektryczną pojazdów szynowych składa się z podsystemów: urządzenia zasilające (podstacje, kabiny sekcyjne, hamowanie odzyskowe), sieć trakcyjna (sieć jezdna), w skład którego wchodzą górna sieć jezdna i sieć powrotna oraz odbierak prądu (pantograf). Dla zapewnienia interoperacyjności systemu kolejowego konieczna jest standaryzacja rozwiązań technicznych objętych tymi podsystemami.
Źródło:
TTS Technika Transportu Szynowego; 2004, 11, 1-2; 61-65
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł

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