Results 111 to 120 of about 44,118 (256)

Dispersal Across Headwaters Determines Fish Population Structure Between Interdigitating River Systems in the Guiana Shield Highlands

open access: yesEcology and Evolution, Volume 16, Issue 5, May 2026.
The genetic population structure of riverine fishes is strongly shaped by the architecture of dendritic river networks, which can shift over both contemporary and geological timescales. Such river rearrangements are rarely incorporated into models of riverscape genetics, but they can have a profound effect on fish populations, especially when formerly ...
Thomas D. Morgan   +8 more
wiley   +1 more source

Wood restoration results in rapid conversion of a degraded plane‐bed channel, Little River, Washington

open access: yesEarth Surface Processes and Landforms, Volume 51, Issue 5, May 2026.
The authors document that wood restoration can rapidly and positively affect a number of geomorphic variables to improve habitat conditions for Pacific salmon. Abstract The loss of instream wood can create a legacy of channel incision that is detrimental to habitat formation.
Aaron Lee   +6 more
wiley   +1 more source

A helicopter handling-qualities study of the effects of engine response characteristics, height-control dynamics, and excess power on nap-of-the-Earth operations [PDF]

open access: yes
The helicopter configuration with an rpm-governed gas-turbine engine was examined. A wide range of engine response time, vehicle damping and sensitivity, and excess power levels was studied.
Corliss, L. D.
core   +1 more source

Characterisation and multiphase flow modelling of a rock avalanche turned into a supraglacial debris flow: Insights from Mt Job, British Columbia, Canada

open access: yesEarth Surface Processes and Landforms, Volume 51, Issue 5, May 2026.
Photographs before (left) and after (right) the May 2023 landslide in Mt Job, Mount Meager Volcanic Complex, British Columbia, Canada. The initial rock avalanche impacted the glacier, producing a 4.5‐km‐long debris flow that ran over it and down the valley.
Jaspreet Singh   +2 more
wiley   +1 more source

Fossil Hegemony and Capitalist Realism in Tropic of Orange

open access: yesFuture Humanities, Volume 4, Issue 1, May 2026.
ABSTRACT This article examines Karen Tei Yamashita's Tropic of Orange (1997) through the lens of Mark Fisher's influential concept ‘capitalist realism’. Scholars of petrofiction have pointed to a political ambivalence in the representation of fossil fuels, where a better understanding of fossil capital can overwhelm as much as galvanize.
Claire Ravenscroft
wiley   +1 more source

The market and the future of gas turbine engines for super heavy transport helicopters

open access: yesАвіаційно-космічна техніка та технологія
The introductory part of the article provides brief information about the main activity of Element JSC – the development and production of electronic control systems for aircraft engines, in particular, the RDC-450M ECU family for turboshaft gas turbine ...
Vadym Nerubaskyi
doaj   +1 more source

A practical approach to helicopter internal noise prediction [PDF]

open access: yes
A practical and well correlated procedure for predicting helicopter internal noise is presented. It accounts for the propagation of noise along multiple paths on an octave by octave basis.
Defelice, J. J., Levine, L. S.
core   +1 more source

Self‐Texturing Scratch‐Resistant and Bacteria‐Repellent Superhydrophobic Polypropylene Surfaces Through Extrusion‐Based Additive Manufacturing

open access: yesMacromolecular Materials and Engineering, Volume 311, Issue 5, May 2026.
One‐step 3D printing combined with in‐situ self‐assembly of behenic acid creates hierarchical polypropylene surfaces with micro‐ and nanostructures. The resulting material exhibits superhydrophobicity with a contact angle of 163 (±2)°, self‐healing, and high scratch resistance, while reducing initial bacterial adhesion by 87%. ABSTRACT Superhydrophobic
Sebastian Schächtele   +10 more
wiley   +1 more source

Helicopter cabin noise: Methods of source and path identification and characterization [PDF]

open access: yes
Internal noise sources in a helicopter are considered. These include propulsion machinery, comprising engine and transmission, and turbulent boundary layer effects.
Murray, B. S., Wilby, J. F.
core   +1 more source

Experimental implementation controlled SPWM inverter based harmony search algorithm [PDF]

open access: yes, 2017
An optimum PI controller using harmony search optimization algorithm (HS) is utilized in this research for the single-phase bipolar SPWM inverter. The aim of this algorithm is to avoid the conventional trial and error procedure which is usually applied ...
A. F. Yahaya, Jabbar   +4 more
core  

Home - About - Disclaimer - Privacy