Results 131 to 140 of about 129,371 (270)
Trophic Changes off Southwest Greenland During the Holocene and Their Influence on Carbon Burial
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Organic carbon (OC) burial in sediments is partly controlled by catabolic biodegradation and remineralization by heterotrophic bacteria, but long‐term records of these bacterially‐mediated processes have not been available. Here, we use stable hydrogen isotope ratio of the saturated C16 fatty acid (δ2HC16:0) as a proxy of the prevalence of ...
Estelle Allan +6 more
wiley +1 more source
Atmospheric Dynamics of IR‐Active Particles Released From Mars' Surface
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Surface release of radiatively active particles, with high infrared‐ (IR‐)to‐visible extinction ratios, has been proposed as a method of warming Mars. However, to warm Mars using aerosols, particles released locally must disperse globally. Here we provide an initial reference study in a plume tracking, dry Martian atmospheric model to address ...
Mark I. Richardson +9 more
wiley +1 more source
Upgrading of vibrating compactor of the railway track ballast of VPO-3000 machine [PDF]
Transport Problems, 2012 In the course of work a new vibrating compactor with single-direction inertial forces according to the authors’ innovative license is applied. Examination of possible dependence on substantiation of the new vibrating device parameters is shown.
Sergey LEE +3 more
doaj
A LTA flight research vehicle [PDF]
, 1975 An Airship Flight Research Program is proposed. Major program objectives are summarized and a Modernized Navy ZPG3W Airship recommended as the flight test vehicle. The origin of the current interest in modern airship vehicles is briefly discussed and the
Nebiker, F. R.
core +1 more source
Assessing the Impact of Sand-Induced Ballast Fouling on Track Stiffness and Settlement
GeotechnicsThis study investigates the impact of sand-induced ballast fouling on railway track performance, focusing on track stiffness (modulus), settlement, and overall degradation.
Mohammed A. Alzhrani +2 more
doaj +1 more source
Evaluation of the Wadden Sea Particularly sensitive Sea Area. On behalf of the Common Wadden Sea Secretariat. [PDF]
, 2010 The purpose of this document is to present the high level outcomes for the evaluation of the effectiveness of the Wadden Sea PSSA, seven years after its designation by the IMO.
Butt, Nickie +4 more
core +1 more source
Electric arc apparatus Patent [PDF]
, 1968 Electric arc heater with supersonic nozzle and fixed arc length for use in high temperature wind ...
Shepard, C. E. +2 more
core +1 more source
Ecosystem Shock: The Devastating Impacts of Invasive Species on the Great Lakes Food Web [PDF]
, 2004 Gives an account of the changes to the Great Lakes ecosystem brought about by non-native aquatic species. Assesses the current and future impacts on fish communities and commercial fisheries.
Gwen White +2 more
core
Frontiers in Marine ScienceMarine plastic pollution poses a significant and escalating threat to ocean ecosystems, with microbial colonization on plastics playing a critical role in determining their environmental fate.
Gregory M. Joern +4 more
doaj +1 more source
Economic Incentives for Controlling Trade-Related Biological Invasions in the Great Lakes [PDF]
Ballast water from commercial ships engaged in international trade has been implicated as the primary invasion pathway in over 60 percent of new introductions of invasive alien species (IAS) in the Great Lakes since 1960.
Horan, Richard D., Lupi, Frank
core +1 more source