Results 91 to 100 of about 804,787 (398)

Differences in Needle Characteristics Between Leader and Return-stroke Stages of Positive Cloud-to-ground Lightning

应用气象学报
Needle discharges, characterized by fine-scale filamentary plasma structures within lightning channels, represent a key manifestation of localized electric field intensification and intricate channel dynamics. Although previous case studies have reported
Wu Bin, Shao Xinran, Lü Weitao, Qi Qi, Lü Fanchao, Ma Ying, Chen Lüwen   +6 more
doaj   +1 more source

Väetamise mõju hariliku kuuse (Picea abies (L.) Karst) poogenditele Pauska seemlas / The effect of fertilization on Norway spruce (Picea abies (L.) Karst) grafts: a case study in Pauska seed orchard

Metsanduslikud Uurimused, 2011
Altogether 197 grafts were studied in Pauska seed orchard in South-Estonia to find out the effect of the fertilization on Norway spruce grafts. The fertilization trials were carried out in May 1988 and 2006.
Kurm Malle, Aosaar Jürgen, Kiviste Andres   +2 more
doaj   +1 more source

A Needle in a Haystack

Journal of Medical Ultrasound, 2021
Min Cheol Chang, Christopher Mares, Mathieu Boudier-Revéret   +2 more
openaire   +6 more sources

Advancing Wildfire‐Retardant Materials: Engineering Strategies for Direct and Indirect Suppression

Advanced Engineering Materials, EarlyView.
Here, the evolution, ecological impact, and performance of current fire‐retardant materials and suppression strategies are reviewed, offering an engineering perspective to address existing challenges and propose pathways for the development of more effective, scalable, and sustainable solutions to meet the demands of a changing climate. Wildfires cause
Changxin Dong, Samya Sen, Athena Kolli, Stewart G. Wilson, Eric Andrew Appel   +4 more
wiley   +1 more source

AGE-SPECIFIC CONTENT OF CONDENSED TANNINS IN THE NEEDLES OF PICEA ABIES SSP. OBOVATA (LEDEB.) DOMIN

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019
Siberian spruce (Picea abies ssp. obovata (Ledeb.) Domin) is one of the dominant species in north-taiga forests and changes in the chemical composition (e. g.
Natalia Artemkina
doaj   +1 more source

Direct Electron Detection Electron Energy‐Loss Spectroscopy: Speeding Up 2D Analytical In Situ Transmission Electron Microscopy for Aluminum Alloys

Advanced Engineering Materials, EarlyView.
Scanning transmission electron microscopy imaging techniques are an essential tool to document dynamic developments, such as precipitation in aluminum alloys, during in situ heating experiments using transmission electron microscopy. However, in many cases, chemical information is required to interpret complex nanoscale processes.
Evelin Fisslthaler, Martina Dienstleder, Judith Lammer, Moritz Theissing, Daniel Knez   +4 more
wiley   +1 more source

Study of the Effect of Process Parameters and Heat Treatment on the Formation and Evolution of Directed Energy Deposition of IN718‐CuCrZr Interface

Advanced Engineering Materials, EarlyView.
Bimetallic structures of Inconel 718 and CuCrZr are fabricated using the laser powder directed energy deposition method. The study reveals a strong dependence of interface characteristics such as width and interfusion on processing and heat treatment strategies.
Hamidreza Javidrad, Bahattin Koc
wiley   +1 more source

Microstructural Evolution and Mechanical Property Degradation of Sn0.5Ag0.7Cu5Bi Solder Joints with High Indium Alloying

Advanced Engineering Materials, EarlyView.
This study identifies 12 wt% indium (In) as the optimal composition for Sn0.5Ag0.7Cu5Bi solder joints, achieving 87% ductile fracture and 81% suppression of intermetallic compound (IMC) growth versus 4 wt% In. High‐In alloys (15–17 wt%) show abnormal IMC thickening due to thermal activation.
Liuwei Wang, Huidong Gu, Xiaojing Wang, Shanshan Cai, Saad Alshammari, Gaber A. M. Mersal, Yanlai Wang, Xulei Wu, Hanhui Lei, Juanna Ren, Mohamed M. Ibrahim, Terence X. Liu   +11 more
wiley   +1 more source

Altitudinal gradients of natural abundance of stable isotopes of nitrogen and carbon in the needles and soil of a pine forest in Nepal

Journal of Forest Science, 2003
This paper deals with natural abundance of 15N and 13C in the soil and needles of the pine forest (Pinus roxburghii, Sargent) along an altitudinal gradient. The study area lies in the elevation range of 1,200 m to 2,200 m in Kathmanduvalley of Nepal. The
S.P. Sah, R. Brumme
doaj   +1 more source

Needles, Needles, Everywhere! [PDF]

Anesthesiology, 2011
Michelle Petrovic, Lauren Berkow, William Merritt, Hugh C. Hemmings   +3 more
openaire   +3 more sources