Results 91 to 100 of about 330,769 (355)

Digital Technologies Disclosure and the Cost of Capital: The Mediating Role of Sustainability Performance

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines the economic consequences of Digital Technologies Disclosure (DTD), focusing on its impact on the cost of capital. The increasing significance of digital transformation in shaping corporate strategies and market perceptions motivates the study.
Hussein Mohsen Saber Ahmed, Awad Elsayed Awad Ibrahim, Khaldoon Albitar   +2 more
wiley   +1 more source

Advanced ramjet concepts program [PDF]

Uniquely advantageous features, on both the performance and weight sides of the ledger, can be achieved through synergistic design integration of airbreathing and rocket technologies in the development of advanced orbital space transport propulsion ...
Leingang, J. L.
core   +1 more source

Effects of Fe3O4 Nanoparticle Stress on the Growth and Development of Rocket Eruca sativa

Journal of nanomaterials, 2019
Plants exposed to stress use the variety of gene regulatory mechanisms to achieve cellular homeostasis, including posttranscriptional regulation of gene expression where microRNAs (miRNAs) play a pivotal role.
Ilona Plaksenkova, Marija Jermaļonoka, Linda Bankovska, I. Gavarāne, V. Gerbreders, Ē. Sļedevskis, J. Sniķeris, I. Kokina   +7 more
semanticscholar   +1 more source

Three‐Dimensional Highly Thermally Conductive Graphene Blocks by Multiscale Blending and Multistage Pressure Induction

Carbon Energy, EarlyView.
An expandable‐thickness graphene block (GPB) with high thermal conductivity synthesized through multiscale blending and multistage pressure induction (MBP) achieves a record thickness of 12.1 mm, which is more than 10 times that of existing graphene materials. The maximum thermal diffusion ability of GPB‐MBP reaches 6.3 W/K, which offers a new approach
Liyu Zhang, Haitao Hu, Xuan Li, Haihan Xu, Xiaoying Gao, Ruishi Lin, Yingze Meng, Jiaxin He, Shoujin Chang, Guoliang Ding   +9 more
wiley   +1 more source

Overview of Al-based nanoenergetic ingredients for solid rocket propulsion

Defence Technology, 2018
The introduction of nano-sized energetic ingredients first occurred in Russia about 60 years ago and arose great expectations in the rocket propulsion community, thanks to the higher energy densities and faster energy release rates exhibited with respect
L. DeLuca
semanticscholar   +1 more source

In Situ Methanation on Mars: A Process Concept Study on the Impact of H2/CO2 and Recycle Ratio

Chemie Ingenieur Technik, EarlyView.
The rocket propellant methane can be produced on Mars by in situ resource utilization. The H2/CO2 ratio is decisive, and excess H2 is favored for providing sufficient propellant purity. The operation mode—with or without recycling of unreacted reactants—depends on the resource availability of the selected landing site. Abstract For return missions from
Franz Braun, Thomas‐Oliver Nagel, Samuel Prinz, Jens Friedland, Robert Güttel   +4 more
wiley   +1 more source

Robust two stages federated learning for sensor based human activity recognition with label noise

Scientific Reports
Federated learning is widely used for collaborative training of human activity recognition models across multiple devices with limited local data. However, label noise caused by human and time constraints during data annotation is common and severely ...
Haifeng Sun, Junping Yao, Xiaojun Li, Yanfei Liu, Hongyang Gu   +4 more
doaj   +1 more source

Numerical Analysis of Solid Rocket Motor Instabilities With AP Composite Propellants [PDF]

, 1999
A non-steady model for the combustion of ammonium perchlorate composite propellants has been developed in order to be incorporated into a comprehensive gasdynamics model of solid rocket motor flow fields.
Beddini, Robert A., Cohen, Norman S., Culick, Fred E. C., Roh, Tae-Seong   +3 more
core  

Plasmakristall‐4 Experiment: 10 Years of Operation in Orbit

Contributions to Plasma Physics, EarlyView.
ABSTRACT Plasmakristall‐4 (PK‐4) is a microgravity complex plasma laboratory operated for 10 years on board the International Space Station. Its main purpose is the particle‐resolved investigation of generic condensed matter phenomena using strongly coupled suspensions of microparticles immersed in low‐pressure gas‐discharge plasmas.
M. Pustylnik, H. M. Thomas, M. Kretschmer, M. Thoma   +3 more
wiley   +1 more source

Wavelet convolutional neural network and dual-channel feature extraction for automatic modulation classification

Journal of King Saud University: Computer and Information Sciences
Automatic Modulation Classification (AMC) identifies modulation formats to ensure correct signal demodulation and interference signal recognition for wireless communication.
Wenke Yang, Xiaoyan Sun, Kai Kang, Jingke Dai, Peng Zhao   +4 more
doaj   +1 more source