Results 1 to 10 of about 582,363 (267)

Several generalizations on Wolstenholme Theorem [PDF]

open access: yesMATEC Web of Conferences, 2022
This paper generalizes Wolstenholme theorem on two aspects. The first generalization is a parameterized form: let p > k + 2, k ≥ 1, ∀t ∈ ℤ, then ${{(pt + p - 1)!} \over {(pt)!}}\mathop \sum \limits_{m = 0}^{k - 1} {( - 1)^m}\mathop \sum \limits_{1 \le {
Zhu Yuyang   +3 more
doaj   +1 more source

Automated Surface Runoff Estimation with the Spectral Unmixing of Remotely Sensed Multispectral Imagery

open access: yesRemote Sensing, 2023
This work presents a methodology for the hydrological characterization of natural and urban landscapes, focusing on accurate estimations of infiltration capacity and runoff characteristics.
Chloe Campo   +2 more
doaj   +1 more source

Effects of the Number of Layers and Thickness Ratio on the Impact Fracture Behavior of AA6061/AA7075 Laminated Metal Composites

open access: yesCrystals, 2023
The initial thickness ratio and number of layers of dissimilar metal components greatly influence the impact performance of laminated metal composites. In this paper, positive and lateral impact tests of 5-layer composite sheets with thickness ratios of ...
Zejun Chen   +4 more
doaj   +1 more source

Assessment of Cytotoxic and Genotoxic Effect of Modern Dental Materials in vivo

open access: yesActa Stomatologica Croatica, 2023
Objectives: The aim of the study was to assess the biocompatibility of modern composite and amalgam dental fillings. Material and Methods: The research was conducted on 150 healthy patients between the ages of 10 and 20 who had amalgam and composite ...
Milena Trutina Gavran   +8 more
doaj   +1 more source

Pembuatan dan Karakterisasi Sifat Fisis Komposit Multilayer Serat Rami

open access: yesJPFT (Jurnal Pendidikan Fisika dan Teknologi), 2021
The use of composites as an innovative new material is increasing. Composites are made from two or more materials that have different properties. This research was conducted to make multilayer composites and determine the effect of variations in the ...
Naila Hilmiyana Syifa   +2 more
doaj   +1 more source

Relation between Prime and Composite Number

open access: yesBibechana, 2018
This article was not peer-reviewed. No abstract available.
Raju Ram Thapa
doaj   +3 more sources

Residual Flexural Performance of Double-Layer Steel–RLHDC Composite Panels after Impact

open access: yesBuildings, 2023
The mechanical behavior of steel–concrete–steel (SCS) sandwich composite structures under low- or high-velocity impact loading has garnered increasing attention from researchers in recent decades.
Zhenyu Huang   +3 more
doaj   +1 more source

Analytical and Numerical Solution of Heat Transfer Equation in Rectangular Composite Fins [PDF]

open access: yesMechanics of Advanced Composite Structures, 2022
Today, the use of composites has received widespread attention due to their special properties that cannot be found in alloys. Kevlar-Epoxy composite is one of the most widely used materials. In this paper, we analyze the heat transfer in rectangular fin
Mohsen Hajinejad Sorkhi   +1 more
doaj   +1 more source

Impact of the number of coupling points on values of composite beams deformations [PDF]

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2011
Technological development, thanks to which high-performance materials were produced, allowed engineers to design elegant structures, which in the total load have smaller share of dead weight.
Tarić Mirsad, Maslak Emir
doaj   +1 more source

Gaps of size 2, 4, and (conditionally) 6 between successive odd composite numbers occur infinitely often [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics
The infinite sequence of gaps (first differences) between successive odd composite numbers contains only the numbers 2, 4, and 6. We prove that, for any natural number k, the sequence of gaps contains infinitely many k-tuplets of consecutive gaps all ...
Joel E. Cohen, Dexter Senft
doaj   +1 more source

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