Results 91 to 100 of about 120,407 (285)

Drop Hammer Impact Test on Concrete Well Walls After Combined Action of Compressive Load and Sulfate Erosion

Buildings
The long-term safety of concrete shaft walls in deep mines faces severe challenges from the coupled effects of stress, chemical erosion, and dynamic disturbances. This study conducted coupled loading and sulfate erosion tests on concrete and investigated
Tongxing Guo, Guoqiang Xu, Wei Zhang, Chenggang Shen   +3 more
doaj   +1 more source

Study on the effect of RDX content on the properties of nitramine propellant

Defence Technology, 2017
Four kinds of nitroamine propellants with different RDX contents (10%, 20%, 30% and 40%) were prepared to study the effect of RDX content on the mechanical properties and combustion properties of nitroamine propellant.
Fen ZHANG, Deng-pan ZHU, Qiong LIU, Zhi-tao LIU, Ping DU   +4 more
doaj   +1 more source

An HST Search for Lyman Continuum Emission From Galaxies at z=1.1--1.4

, 2003
If enough of their Lyman limit continuum escapes, star-forming galaxies could be significant contributors to the cosmic background of ionizing photons. To investigate this possibility, we obtained the first deep imaging in the far ultraviolet of eleven ...
Deharveng J.-M., Freyer T., Giallongo E., Glazebrook K., Kunth D., Madau P., Matthew Malkan, Quinn Konopacky, Rozas M., Seaton M., Sethi S., Tamura N., Wayne Webb   +12 more
core   +1 more source

A Note on Solid-State Maxwell Demon [PDF]

, 2004
Starting from 2002, at least two kinds of laboratory-testable, solid-state Maxwell demons have been proposed that utilize the electric field energy of an open-gap n-p junction and that seem to challenge the validity of the Second Law of Thermodynamics ...
A. Knutson, A.S. Buch
core   +1 more source

Investigation of Energy Absorption in Aluminum Foam Sandwich Panels By Drop Hammer Test: Experimental Results

, 2017
The sandwich panel structures with aluminum foam core and metal surfaces have light weight with high performance in dispersing energy. This has led to their widespread use in the absorption of energy. The cell structure of foam core is subjected to plastic deformation in the constant tension level that absorbs a lot of kinetic energy before destruction
Damghani, Mohammad, Gonabadi, Mohammadzadeh   +1 more
openaire   +1 more source

Gleaning the Rocky Shore? 2500 Years of Coastal Resource Use at Red Bluff 1, GunaiKurnai Country, SE Australia

Archaeology in Oceania, EarlyView.
ABSTRACT Shell middens in Gippsland along the eastern half of Victoria's coastline have usually been characterised as small, short‐duration camp sites with relatively low shell densities and low taxonomic diversity. Here we present new excavation results from a dense, high‐diversity site at Red Bluff near the eastern end of GunaiKurnai Country, a ...
Patrick Faulkner, Bruno David, David M. Kennedy, Fiona Petchey, Joanna Fresløv, Ashleigh J. Rogers, Jillian Garvey, Rachel Kirby, Runjie Yuan, Russell Mullett, John Stanisic, Kyne Krusic‐Golub, V. Ruth Pullin, Matthew C. McDowell, Robert J. Skelly, Anthony Romano, Vanessa N. L. Wong, GunaiKurnai Land and Waters Aboriginal Corporation   +17 more
wiley   +1 more source

An Experimental Study of the Feasibility of Identifying the Impact Damages of Reinforced Concrete Piers Using a Modal Frequency Method

Advances in Civil Engineering, 2020
In this research study, horizontal impact tests were carried out on five reduced scale pier models using China’s most advanced multifunctional ultrahigh heavy drop hammer impact test system and DHDAS dynamic signal acquisition and analysis system. Due to
Xiwu Zhou, Wenchao Zhang, Yushen Gao, Guoxue Zhang, Mengdan Wen   +4 more
doaj   +1 more source

Spartan Daily, April 26, 1978 [PDF]

, 1978
Volume 70, Issue 53https://scholarworks.sjsu.edu/spartandaily/6345/thumbnail ...
San Jose State University, School of Journalism and Mass Communications
core   +1 more source

Diagnosis of Centrifugal Pump Faults Using Vibration Methods [PDF]

, 2012
Pumps are the largest single consumer of power in industry. This means that faulty pumps cause a high rate of energy loss with associated performance degradation, high vibration levels and significant noise radiation.
Al Thobiani, Faisal, Albraik, A., Ball, Andrew, Gu, Fengshou   +3 more
core   +1 more source

Overview of Encapsulated Lysine and Methionine and Their Impacts on Transition Cow Performance and Health

Animal Research and One Health, EarlyView.
The transition period in dairy cows, spanning 3 weeks before and after calving, is a critical phase characterized by increased nutrient demands, reduced dry matter intake (DMI), and elevated risk of metabolic disorders such as negative nutrient balance (NNB), lipolysis, proteolysis, and oxidative stress.
Mohammed S. Seleem, Samy A. Elsaadawy, Zhaohai Wu, Lu Ma, Todd R. Callaway, Dengpan Bu   +5 more
wiley   +1 more source