Results 121 to 130 of about 419,560 (212)

Heat Transfer Comparison of Varied Pebble Sizes and Packing Arrangements in a Pebble-Bed Reactor [PDF]

, 2018
Pebble bed reactors are more cost efficient when heat transfer is optimized. In a pebble-bed reactor, optimizing heat transfer involves the analysis of complex flow.
Spangler, Julian
core  

Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
The Holocene Tiwai Spit on Foveaux Strait is a 12 km by 2 km gravel‐dominated strand plain, ∼10 m above present sea level. Gravel clasts are dominated by well‐rounded quartz cobbles, pebbles and granules derived from Otago Schist 200 km to the north in evolving river drainage systems during late Cenozoic.
Marshall Palmer, Dave Craw
wiley   +1 more source

Reconnaissance Investigation of Sedimentation Patterns in a Small Modern Anthropogenically Influenced Inlet, Otūwhero Estuary, Abel Tasman National Park, New Zealand

New Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 3, September 2026.
The structurally controlled Otūwhero estuary on the SE boundary of Abel Tasman National Park is a small partially filled incised valley. The small size, limited number of fluvial inputs, accessibility and surrounding land use made it an ideal candidate on which to investigate potential climate‐induced estuarine behaviour. Surficial sediment samples and
Mark J. F. Lawrence, Henry J. L. Gard, Barbara Lyndsell, Salman Ashraf, Steven Rosenberg   +4 more
wiley   +1 more source

Steady-state and transient thermal-hydraulic analysis for pebble-bed modular high temperature gas cooled reactor

四川大学学报. 自然科学版
The pebble-bed modular high-temperature gas-cooled reactor （HTGR） is one of the most promising technologies for meeting the requirements of fourth-generation nuclear energy systems.
ZHANG Feng, LIU Wei, WANG Lang, LI Xuelin, GOU Chengjun, GE Li   +5 more
doaj  

Effects of Engineered Dam Releases on Benthic Assemblages During Drought and Comparison With Unregulated Reaches

River Research and Applications, Volume 42, Issue 7, Page 1442-1458, September 2026.
ABSTRACT River regulation following damming is often associated with deleterious downstream effects, in large part due to reduced total discharge and disruption of seasonal flooding. These effects would be expected to be exacerbated by drought, particularly extended drought.
Jeffrey G. Holmquist, Jutta Schmidt‐Gengenbach   +1 more
wiley   +1 more source

Infragravity Waves Across a Steep‐Sloping Rough Rocky Seabed on the Inner Shelf

Journal of Geophysical Research: Oceans, Volume 131, Issue 9, September 2026.
Abstract Observations of infragravity (IG) waves were conducted from June to October 2023 along the rocky shores off China Rock, CA, on the inner shelf at depths of 8–13 m. The study examines inner‐shelf IG wave dynamics over rough, steep rocky shores and compares them with those over smoother, gentler sandy shores and coral reefs. IG energy correlated
Jamie MacMahan, Falk Feddersen, Ad J. H. M. Reniers, Edward B. Thornton, Olavo B. Marques   +4 more
wiley   +1 more source

Hydrologic Retention and Sediment Redistribution Following Beaver Dam Analog (BDA) Installation in a Flashy, Ephemeral, Stormwater‐Impacted Stream

Water Resources Research, Volume 62, Issue 9, September 2026.
Abstract In many watersheds, urbanization and agriculture have altered stream hydrology and morphology, increasing flow variability, and sediment transport imbalances. Beaver dam analogs (BDAs) offer a process‐based alternative to conventional gray or hard‐engineered stormwater infrastructure to slow flow, promote sediment deposition, and enhance ...
Siobhan L. Fathel, Daniel Ressler, Matthew Wilson   +2 more
wiley   +1 more source

Conceptual Model of the Debarking Process of Large Wood in Rivers

Water Resources Research, Volume 62, Issue 9, September 2026.
Abstract When transported in rivers by short‐term episodic events such as floods and debris flows, large wood interacts with the flow, sediment, and river boundaries, leading to physical degradation such as weathering, abrasion, and breakage. This degradation, manifested as mass loss and structural alteration, weakens wood stability, increases mobility,
Jiangtao Yang, Frank Seidel, Virginia Ruiz‐Villanueva, Hervé Piégay, Mário J. Franca   +4 more
wiley   +1 more source

Authigenic Be Isotopes Record Circumpolar Deep Water Inflow and Subglacial Outflow in Antarctic Shelf Sediments

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract The Antarctic Ice Sheet (AIS) has recently undergone accelerating mass loss driven primarily by basal melting associated with Circumpolar Deep Water (CDW) inflow onto the continental shelf. However, temporal variability in CDW inflow and its role in mass loss from the AIS over longer timescales remain uncertain because the duration of the ...
Yuri Yamazaki, Yusuke Suganuma, Takuya Itaki, Atsuko Amano, Takeshige Ishiwa, Daisuke Hirano, Motohiro Hirabayashi, Hiroyuki Matsuzaki, Takeyasu Yamagata, Yuki Tokuda, Takeshi Sugimura, Takeshi Tamura, Kazuya Kusahara, Jun'ichi Okuno, Kosei E. Yamaguchi   +14 more
wiley   +1 more source

Pebble Bed Reactor Program. Coolball: A Machine Code for Thermal Analysis of Pebble Bed Reactor Cores

COOLBALL is an IBM 650 machine program designed to calculate local gas and ball temperatures, gas flow, and pressure loss as induced by nonuniform power generation and voidage within an axial flow pebble-bed reactor core.

core