Results 111 to 120 of about 66,745 (254)

Orbital transfer vehicle oxygen turbopump technology. Volume 1: Design, fabrication, and hydrostatic bearing testing [PDF]

The design, fabrication, and initial testing of a rocket engine turbopump (TPA) for the delivery of high pressure liquid oxygen using hot oxygen for the turbine drive fluid are described.
Buckmann, P. S., Hayden, W. R., Lorenc, S. A., Sabiers, R. L., Shimp, N. R.   +4 more
core   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

Strategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani, Mariano Mastrogiorgio, Giuseppe Carignani   +2 more
wiley   +1 more source

RELIABILITY OF THERMO-MECHANICAL EQUIPMENT IN POWER PLANTS – ELEMENTS WITH HIGH FAILURE R [PDF]

Analele Universităţii "Constantin Brâncuşi" din Târgu Jiu: Seria Inginerie, 2019
Thermal power plants are complex systems with many inter-dependence links and several critical elements that condition the operation of the whole plant. Failure of critical elements such as feed water pump results in a general shut down of the whole unit.
Bogdan Diaconu, Adriana Tudorache, Corina Diana Kaiser   +2 more
doaj  

Efficient Harvesting of Irregular and Low‐Frequency Mechanical Energy via Hybridized Electromagnetic‐Triboelectric Systems

Small, EarlyView.
ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han, Ju‐Hyuck Lee, Hong‐Joon Yoon   +2 more
wiley   +1 more source

Multiobjective Optimization of a Counterrotating Type Pump-Turbine Unit Operated at Turbine Mode

Advances in Mechanical Engineering, 2014
A multiobjective optimization for improving the turbine output and efficiency of a counterrotating type pump-turbine unit operated at turbine mode was carried out in this work.
Jin-Hyuk Kim, Risa Kasahara, Toshiaki Kanemoto, Toru Miyaji, Young-Seok Choi, Joon-Hyung Kim, Kyoung-Yong Lee, Ahmed Mohamed Galal   +7 more
doaj   +1 more source

Renewable Energy‐Driven Green Electricity Supplement for Empowering Blue Economy

SusMat, EarlyView.
In order to support the blue economy to expand to the distant sea, this work proposes the framework driven by renewable energy. It integrates flexible perovskite solar cells, triboelectric nanogenerator‐supercapacitors, grid‐forming control strategies, and AI‐driven digital engines.
Ruibo Fan, Kai Feng, Tiankai Zhang, Heng Wu, Lei Feng, Xiangzhou Yuan   +5 more
wiley   +1 more source

Sargassum Lung Syndrome: Air Flow Obstruction and Bronchial Inflammation Are Observed After Prolonged Exposure to Sargassum Gas Emissions in the Eastern Caribbean

Environmental Toxicology, EarlyView.
ABSTRACT Sargassum inundation of Caribbean and American shorelines is a growing environmental hazard. Hydrogen sulfide (H2S) and ammonia (NH3) produced by decomposing Sargassum could be involved in airway obstruction and bronchial inflammation. The study was undertaken to evaluate the effects of exposure to H2S and NH3 gases emitted during Sargassum ...
Rishika Banydeen, Jonathan Florentin, Maxime Boutourlinsky, Remi Nguyen, Fatima Radouani, Moustapha Agossou, Gary Lutin, Thierry Lebrun, Remi Neviere, Dabor Resiere   +9 more
wiley   +1 more source

Prospects for Developing Compressed Air Energy Storage in Saudi Arabia

IET Smart Energy Systems, EarlyView.
Under Saudi Arabia's Vision 2030, this paper analyses the supporting role of Compressed Air Energy Storage in high‐penetration renewable energy systems and, in light of the local geological resources and grid conditions, demonstrates its feasibility for deployment and future development prospects.
Mingzhong Wan, Jun Li, Xiaoping Wang, Size Li, Jingcui Li, Priyank Lathwal, Zhide Zhu   +6 more
wiley   +1 more source

Introduction: Towards a linguistic anthropology of AI Introduction : vers une anthropologie linguistique de l'IA

Journal of the Royal Anthropological Institute, EarlyView.
This essay introduces the themed cluster of articles, ‘Towards a linguistic anthropology of AI’. The advent of artificial intelligence (AI), especially in large language models capable of producing coherent discourse mimicking conversational interaction, is exerting unprecedented pressure on prevailing concepts of language, personhood, and the human ...
Webb Keane, Constantine V. Nakassis
wiley   +1 more source

A study on various methods of supplying propellant to an orbit insertion rocket engine [PDF]

Various types of pumps and pump drives were evaluated to determine the lightest weight system for supplying propellants to a planetary orbit insertion rocket engine. From these analyses four candidate propellant feed systems were identified. Systems Nos.
Boretz, J. E., Huniu, S., Lewis, J., Pagani, M., Paul, D., Paulsen, B., Thompson, M.   +6 more
core   +1 more source