Results 1 to 10 of about 883,904 (117)

Examining Metal Additives in a Marine Hybrid-Propellant, Water-Breathing Ramjet [PDF]

Journal of Marine Science and Engineering, 2022
This research focuses on theoretically and experimentally evaluating the performance of a metallized hybrid-propellant, water-breathing ramjet. The aluminum and/or magnesium particles added to a polymeric (polyester) fuel grain are hydro-reactive, using ...
Nachum E. Eisen, Alon Gany
doaj   +5 more sources

Open-Sea Testing of Two-Phase Marine Ramjet Propulsion

Journal of Marine Science and Engineering, 2023
Open-sea testing of a two-phase marine ramjet vehicle has been conducted. This experimental phase was accomplished following comprehensive theoretical research. The concept of two-phase marine ramjet propulsion consists of a submerged propulsor acquiring
Shlomit Valensi, Alon Gany
doaj   +5 more sources

Multiphase Marine Ramjet Using Liquefied Gas as a Source of Bubbles [PDF]

Journal of Marine Science and Engineering, 2020
An innovative variant of a multiphase marine ramjet is investigated analytically and experimentally. Pressure liquefied gas (LG) is injected, boiling under superheat conditions in the water stream within the propulsion unit, and serving as an on-board ...
Herman D. Haustein, Alon Gany, Ezra Elias   +2 more
doaj   +5 more sources

Theoretical Performance Evaluation of a Marine Solid Propellant Water-Breathing Ramjet Propulsor [PDF]

Journal of Marine Science and Engineering, 2019
This work analyzes and presents theoretical performance of a marine water-breathing ramjet propulsor. A conceptual scheme of the motor is shown, the equation of thrust is presented, and the dependence on cruise velocity and depth are discussed. Different propellant compositions, representing a wide variety of formulations suitable for propelling a ...
Eisen, Gany
openaire   +2 more sources

Dynamic Testing of a Hybrid-Propellant Water-Breathing Ram Rocket in Underwater Cruise Conditions

Journal of Marine Science and Engineering
High-speed submerged marine vehicles, such as torpedoes, traveling at velocities of an order of 100 m/s and above, require powerful propulsion to overcome the tremendous hydrodynamic drag.
Sagi Dinisman, Nachum E. Eisen, Alon Gany   +2 more
doaj   +2 more sources

Historical and current usage of per‐ and polyfluoroalkyl substances (PFAS): A literature review

American Journal of Industrial Medicine, Volume 66, Issue 5, Page 353-378, May 2023., 2023
Abstract Background Per‐ and polyfluoroalkyl substances (PFAS) have uniquely useful chemical and physical properties, leading to their extensive industrial, commercial, and consumer applications since at least the 1950s. Some industries have publicly reported at least some degree of information regarding their PFAS use, while other industries have ...
Linda G. T. Gaines
wiley   +1 more source

Impacts of Climate Change on Marine Foundation Species.

Annual Review of Marine Science, 2023
Marine foundation species are the biotic basis for many of the world's coastal ecosystems, providing structural habitat, food, and protection for myriad plants and animals as well as many ecosystem services.
T. Wernberg, Mads S Thomsen, Julia K Baum, Melanie J Bishop, John F Bruno, Melinda A Coleman, Karen Filbee‐Dexter, Karine Gagnon, Qiang He, Daniel Murdiyarso, Kerrylee Rogers, Brian R Silliman, Dan A Smale, S. Starko, Mathew A Vanderklift   +14 more
semanticscholar   +1 more source

Biological Impacts of Marine Heatwaves.

Annual Review of Marine Science, 2022
Climatic extremes are becoming increasingly common against a background trend of global warming. In the oceans, marine heatwaves (MHWs)-discrete periods of anomalously warm water-have intensified and become more frequent over the past century, impacting ...
Kathryn E. L. Smith, M. Burrows, A. Hobday, Nathan G. King, P. Moore, A. Sen Gupta, M. Thomsen, T. Wernberg, D. Smale   +8 more
semanticscholar   +1 more source

Novel Bioactive Compounds From Marine Sources as a Tool for Functional Food Development

Frontiers in Marine Science, 2022
The marine environment is a relatively unexplored source of functional ingredients that can be used in food processing, storage, and fortification in a variety of ways.
Susmita Ghosh, Tanmay Sarkar, S. Pati, Z. Kari, H. Edinur, R. Chakraborty   +5 more
semanticscholar   +1 more source

Marine Collagen: A Promising Biomaterial for Wound Healing, Skin Anti-Aging, and Bone Regeneration

Marine Drugs, 2022
Marine organisms harbor numerous bioactive substances that can be utilized in the pharmaceutical and cosmetic industries. Scientific research on various applications of collagen extracted from these organisms has become increasingly prevalent.
Sarah Geahchan, Parnian Baharlouei, A. Rahman   +2 more
semanticscholar   +1 more source