Results 51 to 60 of about 2,497 (152)

A Comprehensive Study of Biohopanoid Production in Alphaproteobacteria: Biosynthetic, Chemotaxonomical, and Geobiological Implications

Geobiology, Volume 23, Issue 6, November/December 2025.
ABSTRACT Bacteriohopanepolyol derivatives (BHPDs) and dia‐ and catagenetic products formed from these bacterial membrane modifiers are extensively used as biomarkers in molecular ecological and geoscience studies. Some BHPDs can be assigned to specific phylogenetic bacterial groups. With the vastly increasing availability of complete bacterial genomes,
Jaap S. Sinninghe Damsté, Michel Koenen, Vera Thiel, Nora Richter, Ellen C. Hopmans, Nicole J. Bale   +5 more
wiley   +1 more source

A Stabilized Incompressible SPH Method by Relaxing the Density Invariance Condition

Journal of Applied Mathematics, 2012
A stabilized Incompressible Smoothed Particle Hydrodynamics (ISPH) is proposed to simulate free surface flow problems. In the ISPH, pressure is evaluated by solving pressure Poisson equation using a semi-implicit algorithm based on the projection method.
Mitsuteru Asai, Abdelraheem M. Aly, Yoshimi Sonoda, Yuzuru Sakai   +3 more
doaj   +1 more source

Numerical Study of Impulsive Wave Overtopping at Rigid Hydraulic Structures Using Incompressible Smoothed Particle Hydrodynamics Model [PDF]

Journal of Hydraulic Structures
Understanding the behavior of wave overtopping at hydraulic structures is critical for ensuring the stability and longevity of dams and coastal defenses.
Rasoul Memarzadeh
doaj   +1 more source

Evaluatoin of Incompressible and Compressible SPH Methods in Modeling Dam Break Flows

International Journal of Coastal and Offshore Engineering, 2018
Smoothed Particle Hydrodynamic (SPH) is an attractive Lagrangian tool for simulating flows with large displacement at free surface boundary. Two widely used subcategories of this method are Weakly compressible SPH (WCSPH) and truly Incompressible SPH ...
Hassan Akbari
doaj  

Extrapolation Boundary Conditions for 2‐D Smoothed Particle Hydrodynamics

International Journal for Numerical Methods in Fluids, Volume 97, Issue 9, Page 1248-1279, September 2025.
This paper introduces novel inflow, outflow, and wall boundaries for the WCSPH method. Utilising innovative concepts from finite volume methods, fluid properties of sequential dynamic particles with varying distances to boundaries are extrapolated to ghost and wall particles using first‐order Taylor series expansion.
Hossein Mahdizadeh, Colin D. Rennie, Benedict D. Rogers, Abolghasem Pilechi   +3 more
wiley   +1 more source

2D Numerical ISPH Wave Tank for Complex Fluid-Structure Coupling Problems [PDF]

, 2016
In this paper, we provide a hybrid incompressible Smoothed Particle Hydrodynamics (ISPH) model for fluid-structure interactions. The numerical algorithms include the mirroring treatment of solid boundary, free surface tracking, wave damping using sponge ...
Shao, S., Tan, S., Liu, X., Lin, P.
core   +1 more source

Heterogeneity of provider preferences for HIV Care Coordination Program features: latent class analysis of a discrete choice experiment

HIV Research & Clinical Practice
The PROMISE study assessed revisions designed to facilitate implementation of an HIV care coordination program (CCP) addressing gaps in care and treatment engagement among people living with HIV in New York City (NYC). Through latent class analysis (LCA)
Chunki Fong, Madellena Conte, Rebecca Zimba, Jennifer Carmona, Gina Gambone, Abigail Baim-Lance, McKaylee Robertson, Mary Irvine, Denis Nash   +8 more
doaj   +1 more source

Distinguishing passive and driven trait evolution in the presence of boundaries

Methods in Ecology and Evolution, Volume 16, Issue 9, Page 2067-2081, September 2025.
Abstract Quantifying the dynamics of macroevolutionary trends, such as changes in body size and complexity, is vital for understanding the processes that have shaped patterns of extant and extinct biodiversity. For example, whilst maximum body size may tend to increase within lineages (the Cope‐Depéret rule), it is still unclear whether such patterns ...
Elliot M. Butterworth, Tim Rogers, Matthew A. Wills   +2 more
wiley   +1 more source

Comparative Genomics Insights Into the Evolutionary Disparities Between Nitroplast‐Evolved Ecotype UCYN‐A2 and Its Closest Relative UCYN‐A1

Ecology and Evolution, Volume 15, Issue 7, July 2025.
This paper conducted comparative genomic analyses among seven UCYN‐A strains in genome content, gene structure, and key metabolic protein genes. In general, our results demonstrated considerable disparities between UCYN‐A1 and UCYN‐A2, providing insights into the evolution of UCYN‐A and nitroplast.
Shiyun Han, Sijia Zhang, Wen Ge, Jianke Yang, Hui Peng, Jinming Gao, Mengsa Zhang, Yingying Xiao, Dongsheng Du, Xianzhao Kan   +9 more
wiley   +1 more source

مدل‌سازی عددی جریان به روش ISPH در مسائل شکست سد، جریان از روی سرریز و عملکرد همزمان دریچه و سرریز [PDF]

هیدرولیک, 2012
مدل‌سازی جریان‌های سطح آزاد با استفاده از نسل جدید روش‌های عددی موسوم به روش‌های بدون المان و به طور خاص روش هیدرودینامیک ذرات هموار1 (SPH) یکی از مسائل مورد توجه در حال حاضر است.
زهرا قدم پور, ناصر طالب بیدختی, سید محمدرضا هاشمی, امیر حسین نیک سرشت   +3 more
doaj   +1 more source