Results 131 to 140 of about 582,984 (315)

Fibonacci Sums Modulo 5

Annales Mathematicae Silesianae
We develop closed form expressions for various finite binomial Fibonacci and Lucas sums depending on the modulo 5 nature of the upper summation limit. Our expressions are inferred from some trigonometric identities.
Adegoke Kunle, Frontczak Robert, Goy Taras   +2 more
doaj   +1 more source

Moduli space of filtered λ-ringstructures over a filtered ring

International Journal of Mathematics and Mathematical Sciences, 2004
Motivated in part by recent works on the genus of classifying spaces of compact Lie groups, here we study the set of filtered λ-ring structures over a filtered ring from a purely algebraic point of view. From a global perspective, we first show that this
Donald Yau
doaj   +1 more source

Recurrence relations for binomial-Eulerian polynomials

, 2017
Binomial-Eulerian polynomials were introduced by Postnikov, Reiner and Williams. In this paper, properties of the binomial-Eulerian polynomials, including recurrence relations and generating functions are studied. We present three constructive proofs of the recurrence relations for binomial-Eulerian polynomials.
Ma, Jun, Ma, Shi-Mei, Yeh, Yeong-Nan
openaire   +2 more sources

The Importance of Environmental Heterogeneity in Evaluating the Conservation Status of Two Frog Species in a Changing Amazonian Interfluve

Animal Conservation, EarlyView.
Identifying the most effective criterion to assess the conservation status of vulnerable species in threatened tropical regions is crucial to evaluate recovery plans. We investigated the influence of environmental heterogeneity on the extent of occurrence (EOO), area of occupied habitat (AOH), and density variation of two Amazonian riparian frog ...
Rafael F. Jorge, Pedro Aurélio Costa Lima Pequeno, William E. Magnusson, Albertina Pimentel Lima   +3 more
wiley   +1 more source

Polynomial Boundary Perturbation for Optimal Plastic Design of Heads of Plane Tension Members

Engineering Transactions, 1996
The paper presents the boundary perturbation method applied to optimaI plastic shape design. Perfect plasticity is assumed. The procedure consists of two steps: determination of a class of fully plastic solutions in the limit state, and then the choice ...
W. Egner
doaj  

Evaluation of Computing Symmetrical Zolotarev Polynomials of the First Kind [PDF]

Radioengineering, 2017
This report summarize and compares with each other various methods for computing the symmetrical Zolotarev Polynomial of the first kind and its spectrum. Suitable criteria are suggested for the comparison.
J. Kubak, P. Sovka, M. Vlcek
doaj  

Effects of soil physical properties on dung beetle assemblages in pasture landscapes of the Brazilian Cerrado

Agricultural and Forest Entomology, EarlyView.
We assessed the effect of the type of soil texture (loamy sand and sandy loam) and its physical properties on dung beetle species assemblages in a pastureland region of the Brazilian Cerrado. We found a reduction in the total and paracoprid beetle abundances in loamy sand soil. Furthermore, the increase of soil compaction negatively affected the entire
César Murilo de Albuquerque Correa, Renato Portela Salomão, Anderson Puker, Fernando Z. Vaz‐de‐Mello, Alfredo Raúl Abot   +4 more
wiley   +1 more source

The Nasal Microbiome and Associations With Environmental Exposures and Respiratory Health

Allergy, EarlyView.
This study evaluates the association of the nasal microbiome with air pollutants, meteorological conditions, and respiratory health in adolescents. Bacterial diversity is positively associated with hay fever and short‐term NO2 exposure, and negatively with temperature. A Moraxella‐dominated nasotype is linked to lower O3 exposure and higher temperature
Javier Perez‐Garcia, Anne K. Bozack, Sheryl L. Rifas‐Shiman, Yanjiao Zhou, Joanne Sordillo, Brent Coull, Heike Luttmann‐Gibson, Joel Schwartz, Marie‐France Hivert, Emily Oken, Diane R. Gold, Andres Cardenas   +11 more
wiley   +1 more source

Vitamin D levels and biomarkers of male fecundity: A study from the Danish National Birth Cohort

Andrology, EarlyView.
Abstract Background Vitamin D is metabolised throughout the male reproductive system, suggesting a direct regulatory role of vitamin D in male reproduction. Objectives To investigate the association between plasma vitamin D levels at sperm ejaculation and during spermatogenesis and biomarkers of male fecundity in young men.
Anne Gaml‐Sørensen, Nis Brix, Sandra Søgaard Tøttenborg, Christian Lindh, Karin Sørig Hougaard, Siri Eldevik Håberg, Gunnar Toft, Jens Peter Ellekilde Bonde, Cecilia Høst Ramlau‐Hansen   +8 more
wiley   +1 more source

Regression Extensions of the New Polynomial Exponential Distribution: NPED-GLM and Poisson–NPED Count Models with Applications in Engineering and Insurance

Computation
The New Polynomial Exponential Distribution (NPED), introduced by Beghriche et al. (2022), provides a flexible one-parameter family capable of representing diverse hazard shapes and heavy-tailed behavior. Regression frameworks based on the NPED, however,
Halim Zeghdoudi, Sandra S. Ferreira, Vinoth Raman, Dário Ferreira   +3 more
doaj   +1 more source