Results 101 to 110 of about 248,402 (331)

Lucas' theorem: its generalizations, extensions and applications (1878--2014) [PDF]

, 2014
In 1878 \'E. Lucas proved a remarkable result which provides a simple way to compute the binomial coefficient ${n\choose m}$ modulo a prime $p$ in terms of the binomial coefficients of the base-$p$ digits of $n$ and $m$: {\it If $p$ is a prime, $n=n_0 ...
Meštrović, Romeo
core  

Ruddlesden–Popper Structured Sr3Fe2O7−δ as Redox‐Activated CO2 Sorbents for Green Hydrogen Production

Advanced Energy and Sustainability Research, EarlyView.
A‐site and B‐site doped strontium ferrite‐type Ruddlesden–Popper oxides are evaluated as CO2 sorbents for glycerol‐based hydrogen production via sorption‐enhanced steam reforming. A Sr1.4Ca0.6Fe0.9Ni0.1O4−δ composition forms an active Sr3Fe2O7 phase, achieving ≈95 vol% H2 purity and over sixfold longer CO2 prebreakthrough time (tpb) than its perovskite
Mahe Rukh, Runxia Cai, Seyedamin Razavi, Sam Portillo, Yuge Yao, Luke Neal, Fanxing Li   +6 more
wiley   +1 more source

Moving Objects Detection in Video Sequences [PDF]

, 2011
Tato práce se zabývá problematikou rozpoznávání a detekce objektů a osob ve video sekvenci i ve statickém obraze. Navržená aplikace využívá kombinaci detekce pohybu pomocí background modelu, rozpoznání osob pomocí histogramů orientovaných gradientů a ...
Havelka, Jan
core  

Integers represented by Lucas sequences

The Ramanujan Journal
Abstract In this paper, we study the sets of integers which are n-th terms of Lucas sequences. We establish lower- and upper bounds for the size of these sets. These bounds are sharp for n sufficiently large. We also develop bounds on the growth order of the terms of Lucas sequences that are independent of the parameters of the sequence ...
Lajos Hajdu, R. Tijdeman
openalex   +3 more sources

Hi‐LabSpermTracking: A Novel and High‐Quality Sperm Tracking Dataset with an Advanced Ensemble Detection and Tracking Approach for Real‐World Clinical Scenarios

Advanced Intelligent Systems, EarlyView.
This study presents Hi‐LabSpermTracking, a long‐duration, expert‐annotated sperm motility dataset for detection and tracking. It evaluates You Only Look Once version 8, Real‐Time Detection Transformer, and Simple Online and Realtime Tracking with a Deep Association Metric in three scenarios. The mean ensemble method improves tracking performance. Sperm
Abdulsamet Aktas, Gorkem Serbes, Hakkı Uzun, Merve Huner Yigit, Nizamettin Aydin, Hamza Osman Ilhan   +5 more
wiley   +1 more source

Two‐Stage Catalytic Conversion of Carbon Dioxide Into Aromatics Via Methane

Angewandte Chemie, EarlyView.
The development of a two‐stage process for converting CO2 via CH4 to C6H6 using a Ni/TiO2 catalyst in stage 1 and a Mo/ZSM‐5 catalyst stage 2. Thermodynamic calculations as well as experimentally varying parameters, aided in finding the optimal reaction conditions and reducing the coke deposition in stage 2.
Josepha J. G. Kromwijk, Angela E. M. Melcherts, Luke de Jong, Jules F. van Leusden, Joris C. L. Janssens, Ramon Oord, Ward van der Stam, Matteo Monai, Bert M. Weckhuysen   +8 more
wiley   +2 more sources

Co‐flowering with congeners does not affect buzz‐pollinator specialization and pollination performance in Rhexia mariana, but does affect floral trait variance

American Journal of Botany, EarlyView.
Abstract Premise Pollinator‐mediated plant‐plant interactions may be negative (i.e., competition, reproductive interference) or positive (i.e., facilitation). Especially when co‐flowering with close relatives (e.g., congeners), negative interactions through reproductive interference may be strong and result in floral trait divergence and increased ...
Agnes S. Dellinger, Karolina Gwardiak, Ash Kerber, Viktoria C. Wieser, Karen D. Pérez‐Arroyo   +4 more
wiley   +1 more source

The congruence of Wolstenholme and generalized binomial coefficients related to Lucas sequences [PDF]

, 2014
Using generalized binomial coefficients with respect to fundamental Lucas sequences we establish congruences that generalize the classical congruence of Wolstenholme and other related stronger congruences.Comment: 23 ...
Ballot, Christian
core  

Exonic Variation and Its Clinical Impact in 7221 Old Order Amish

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT The Amish of Lancaster County, PA has been the focus of genetic studies for many years due to its demographic history and unique genetic makeup that includes a historical bottleneck event and subsequent genetic drift, resulting in a marked decrease in genetic diversity and increased frequency of some variants that have substantially shaped the
Braxton D. Mitchell, Ebuka Onyenobi, Joshua P. Lewis, Brady Gaynor, James A. Perry, Kristin Maloney, Jeffrey R. O'Connell, Jessica Tiner, Amber L. Beitelshees, Cristopher V. Van Hout, Patrick F. McArdle, Huichun Xu, Erik G. Puffenberger, Karlla W. Brigatti, Melanie Daue, Hilary B. Whitlatch, Anna Alkelai, Alejandro A. Schäffer, John Overton, Elizabeth A. Streeten, Toni I. Pollin, Alan R. Shuldiner   +21 more
wiley   +1 more source

The degree sequence of Fibonacci and Lucas cubes

Discrete Mathematics, 2011
The Fibonacci cube $\Gamma_n$ is the subgraph of the $n$-cube induced by the binary strings that contain no two consecutive 1's. The Lucas cube $\Lambda_n$ is obtained from $\Gamma_n$ by removing vertices that start and end with 1. It is proved that the number of vertices of degree $k$ in $\Gamma_n$ and $\Lambda_n$ is $\sum_{i = 0}^k \binom{n-2i}{k-i} \
Sandi Klavar, Marko Petkovšek, Michel Mollard   +2 more
openaire   +3 more sources