Results 1 to 10 of about 11,560,820 (354)

Colourings of (k-r,k)-trees [PDF]

open access: yesOpuscula Mathematica, 2017
Trees are generalized to a special kind of higher dimensional complexes known as \((j,k)\)-trees ([L. W. Beineke, R. E. Pippert, On the structure of \((m,n)\)-trees, Proc. 8th S-E Conf. Combinatorics, Graph Theory and Computing, 1977, 75-80]), and which
M. Borowiecki, H. P. Patil
doaj   +2 more sources

Survey of qualitative and quantitative characteristics of local Populus spp. trees (Case study: Kurdistan province) [PDF]

open access: yesمجله جنگل ایران, 2021
Due to the lack of documentation on local poplar farms, 50 sample plots in Kurdistan province were random-systematically- selected and their habitat and vegetative characteristics were recorded in 2018.
B. Yousefi, M. Kalagari
doaj   +1 more source

The “AI + R” - tree: An Instance-optimized R - tree

open access: yes2022 23rd IEEE International Conference on Mobile Data Management (MDM), 2022
To appear in the proceedings of The 23rd IEEE International Conference on Mobile Data Management (2022)
Abdullah Al-Mamun 0003   +3 more
openaire   +2 more sources

Hyperbolic spaces and directional contractions [PDF]

open access: yesBulletin of Mathematical Sciences, 2019
The axiomatic approach to metric convexity goes back to the pioneering work of Karl Menger in 1928. This is an overview of this concept and the role it plays in metric fixed point theory especially in conjunction with spaces possessing a “hyperbolic ...
W. A. Kirk, Naseer Shahzad
doaj   +1 more source

IN VITRO SHORT-TERM GERMPLASM PRESERVATION OF Myrtus communis L [PDF]

open access: yesJournal of Plant Production, 2007
Shoot tips were obtained from Myrtus communis tissue cultured shootlets and in vitro preserved either by cryopreservation protocols (through vitrification, encapsulation-dehydration) or by cold preservation (4°C), as well as control storage at culture ...
Ranya Abdel Salam   +3 more
doaj   +1 more source

Novel Viroid‐Like RNAs Naturally Infect a Filamentous Fungus

open access: yesAdvanced Science, 2023
To date, viroids have been found to naturally infect only plants, resulting in substantial losses for some crops. Whether viroids or viroid‐like RNAs naturally infect non‐plant hosts remains unknown.
Kaili Dong   +10 more
doaj   +1 more source

EFFECT OF IRRIGATION WATER REGIME ON NAVEL ORANGE YIELD, FRUIT QUALITY AND SOME WATER RELATIONS IN THE NORTH MIDDLE NILE DELTA REGION [PDF]

open access: yesJournal of Plant Production, 2012
A field experiment was carried out during the two successive growing seasons 2009/2010 and 2010/2011at a private orchard located at, Motobus, Kafr El Sheikh Governorate, Egypt, on twenty years old Navel orange (Citrus sinensis, Osbeck) to study the ...
M. Gabr, E. Moursi, A. El-Abd
doaj   +1 more source

Regular matching problems for infinite trees [PDF]

open access: yesLogical Methods in Computer Science, 2022
We study the matching problem of regular tree languages, that is, "$\exists \sigma:\sigma(L)\subseteq R$?" where $L,R$ are regular tree languages over the union of finite ranked alphabets $\Sigma$ and $\mathcal{X}$ where $\mathcal{X}$ is an alphabet of ...
Carlos Camino   +4 more
doaj   +1 more source

Efficiency of different summary statistics in modelling spatial point patterns of Christ's thorn jujube trees (Ziziphus spina-christi (L.) Wild.) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2015
Understanding the ecological processes underlying the spatial distribution of trees is enabled by simulation of their spatial structure within stands.
Seyyed Yousef Erfanifard   +1 more
doaj   +1 more source

Algorithm to Construct Node-independent Spanning Trees in Data Center Network BCDC [PDF]

open access: yesJisuanji kexue, 2022
As the foundation of cloud computing technology,the communication performance of data center networks has become a research hotspot in recent years.And as an important infrastructure of data center networks,independent spanning trees(ISTs) attract much ...
PAN Zhi-yong, CHENG Bao-lei, FAN Jian-xi, BIAN Qing-rong
doaj   +1 more source

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