Results 91 to 100 of about 14,190 (245)

C/C-SiC Composites for Nozzle of Solid Propellant Ramjet

Journal of Aeronautical Materials, 2017
Carbon fiber reinforced carbon and silicon carbide matrix composites for nozzle inner of solid propellant ramjet were prepared by using the hybrid process of "chemical vapor infiltration + precursor impregnation pyrolysis (CVI+PIP)".
WANG Lingling, JI Alin, GAO Yaqi, CUI Hong, YAN Liansheng, PANG Fei   +5 more
doaj   +1 more source

Scaling‐Aware Rating of Poisson‐Limited Demand Forecasts

Journal of Forecasting, Volume 45, Issue 2, Page 787-805, March 2026.
ABSTRACT Forecast quality should be assessed in the context of what is possible in theory and what is reasonable to expect in practice. Often, one can identify an approximate upper bound to a probabilistic forecast's sharpness, which sets a lower, not necessarily achievable, limit to error metrics.
Malte C. Tichy, Illia Babounikau, Nikolas Wolke, Stefan Ulbrich, Michael Feindt   +4 more
wiley   +1 more source

Mars Ascent Vehicle - Payload?, Spacecraft?, Launch Vehicle? - A Systems Approach to MAV [PDF]

Significant effort has been expended over the past few years in order to examine propulsion technologies for an eventual robotic Mars Ascent Vehicle (MAV).
Bishop, Karen, Frame, Kyle, Jackman, Angie, Ma, Peter   +3 more
core   +1 more source

Design, Manufacture and Experimental Study of a Hydrogen Peroxide-HTPB Hybrid Rocket Motor [PDF]

فصلنامه علوم و فناوری فضایی, 2013
The application of the hydrogen peroxide as the oxidizer of a HTPB-based prototype hybrid motor is investigated in this paper. First of all, by studying the thermochemical characteristics of the propellant,operation range of different compositions is ...
Hojat Ghassemi, Mohammad Nadafi – Pour Meibody, Keyvan Shaabani, Isa Asghari, Ebrahim Zanjirian   +4 more
doaj  

The Role of Creativity and Innovation Management Research in Times of Changing Security and Defence Realities

Creativity and Innovation Management, Volume 35, Issue 1, Page 84-90, March 2026.
ABSTRACT Geopolitical uncertainties and the resurgence of security and defence needs present both opportunities and challenges for creativity and innovation management. At both the organizational and the individual levels, we are confronted with multiple ethically challenging choices. Given the changing global security and defence realities, we outline
Mette Præst Knudsen, Carsten Schultz, Søren Salomo, Max von Zedtwitz, Jennie Björk   +4 more
wiley   +1 more source

Space Transportation Materials and Structures Technology Workshop [PDF]

The Space Transportation Materials and Structures Technology Workshop was held on September 23-26, 1991, in Newport News, Virginia. The workshop, sponsored by the NASA Office of Space Flight and the NASA Office of Aeronautics and Space Technology, was ...
Cazier, Frank W., Jr., Gardner, James E.
core   +1 more source

Formulation, Casting, and Evaluation of Paraffin-Based Solid Fuels Containing Energetic and Novel Additives for Hybrid Rockets [PDF]

, 2012
This investigation studied the inclusion of various additives to paraffin wax for use in a hybrid rocket motor. Some of the paraffin-based fuels were doped with various percentages of LiAlH4 (up to 10%).
Borduin, Russell, Boyer, Eric, Brady, Brian B., Curtiss, Thomas J., Desain, John D., Koo, Joseph H., Kuo, Kenneth K., Larson, Daniel B., Story, George, Wachs, Trevor   +9 more
core   +1 more source

Tandem Takeoff: Powering Tomorrow with Industrial‐Grade Perovskite/Silicon Solar Cells

Advanced Energy Materials, Volume 16, Issue 5, 4 February 2026.
Perovskite/silicon tandem solar cells have recently achieved certified power conversion efficiencies of 34.85%, far exceeding the Shockley‐Queisser limit for single‐junction silicon and standalone perovskite cells. This review highlights the latest advances in the design, integration, and optimization of perovskite top cells for monolithic tandem ...
Maria Vasilopoulou, Di Huang, Jue Gong, Faming Li, Hao Zhang, Yinqing Sun, Lin Mao, Ermioni Polydorou, Ioannis G. Aviziotis, Leonidas C. Palilis, Onurcan Kaya, Stephan Roche, Jordi Arbiol, Dimitrios Davazoglou, Emmanuel Kymakis, Lei Liu, Kuan Sun, Abd Rashid bin Mohd Yusoff, Mingzhen Liu, Mohammad Khaja Nazeeruddin   +19 more
wiley   +1 more source

From Earth to Orbit: An assessment of transportation options [PDF]

The report assesses the requirements, benefits, technological feasibility, and roles of Earth-to-Orbit transportation systems and options that could be developed in support of future national space programs.
Blond, Edmund, Brill, Yvonne C., Budiansky, Bernard, Cooper, Robert S., Demisch, Wolfgang H., Gavin, Joseph G., Jr., Hawk, Clark W., Kerrebrock, Jack L., Lichtenberg, Byron K., Mager, Artur   +9 more
core   +1 more source

Economic and Technical Assessment of Wind Potential Using SARIMAX Time Series Models: Wind Speed Forecasting and Analysis

Energy Science &Engineering, Volume 14, Issue 2, Page 973-998, February 2026.
The wind energy potential of Khaf was evaluated for 2025 using 15 years of wind data combined with advanced forecasting models, SARIMAX and Prophet. This integrated framework enables precise estimation of wind power density and optimal turbine selection, paving the way for the efficient and sustainable development of wind farms in the region.
Mohammad Amin Valizadeh, Iman Khorsandi Shamir, Abolfazl Ahmadi, Mojtaba Mirhosseini   +3 more
wiley   +1 more source