Results 71 to 80 of about 342 (196)

Using Rubber Fillers to Fabricate Strain Gradient Material—An Excellent Approach for Developing High‐Toughness Cement‐Based Composites

Engineering Reports, Volume 8, Issue 3, March 2026.
Strain gradient cement‐based composites (SGCC) were fabricated by using rubber fillers in this study. This design of SGCC can realize the function of stress redistribution, multi‐crack dissipation, and efficient energy to improve the toughness of concrete structures.
Keliang Wang, Chuanli Zhong, Zhide Huang, Yueqiang Qi, Gangnian Xu   +4 more
wiley   +1 more source

Experimental Research into an Innovative Green Propellant Based on Paraffin–Stearic Acid and Coal for Hybrid Rocket Engines

Inventions
This study focuses on an innovative green propellant based on paraffin, stearic acid, and coal, used in hybrid rocket engines. Additionally, lab-scale firing tests were conducted using a hybrid rocket motor with gaseous oxygen as the oxidizer, utilizing ...
Grigore Cican, Alexandru Paraschiv, Adrian Nicolae Buturache, Andrei Iaroslav Hapenciuc, Alexandru Mitrache, Tiberius-Florian Frigioescu   +5 more
doaj   +1 more source

Multiphysics Modelling of a Hybrid Rocket Engine [PDF]

14th WCCM-ECCOMAS Congress, 2021
Ferrero, A., Masseni, F., Muscarà, L., Pastrone, D.   +3 more
openaire   +2 more sources

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

Validation of Integral Method for Numerical Prediction of Hybrid Rocket Internal Ballistics

Journal of Fluid Science and Technology, 2013
In order to design hybrid rocket engines, we developed a numerical prediction method which describes the internal ballistics, thus the solid fuel regression rate. In order to obtain a fast code, simple but efficient models have been implemented.
Yuki FUNAMI, Toru SHIMADA
doaj   +1 more source

Launch support: Managing complementor bottlenecks in the disruptive innovation of small satellites

Strategic Management Journal, Volume 47, Issue 3, Page 758-803, March 2026.
Abstract Research Summary Through both qualitative and quantitative analyses of large‐rocket providers' support for small‐satellite manufacturers before the emergence of small rockets, we examine how disruptors to an incumbent ecosystem gain support from complementors of the incumbent technology.
Yue Song, Yue Maggie Zhou, Xiaoping Zhao
wiley   +1 more source

Harnessing Satellite Constellations as Signals of Opportunity for an Enhanced Specification of the Satellite Drag Environment in the Critical LEO Regime

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Enhancing the accuracy of orbit predictions for low‐Earth orbit (LEO) satellites and debris is vitally important for satellite owner/operators dedicated to ensuring the safety and sustainability of the LEO environment. Presently, the largest source of error in orbit predictions stems from uncertainties in the estimation of thermospheric mass ...
D. J. Fitzpatrick, E. K. Sutton, M. D. Pilinski, S. E. Palo   +3 more
wiley   +1 more source

A theoretical study on throttle ranges of O/F controllable hybrid rocket propulsion systems

Journal of Fluid Science and Technology, 2018
The characteristics of several O/F control methods for hybrid rocket propulsion have been discussed and theoretically analyzed from the physical properties of propellants and fuel regression behavior.
Kohei OZAWA, Toru SHIMADA
doaj   +1 more source

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

Hybrid Rocket Engine Burnback Simulations Using Implicit Geometry Descriptions

Aerospace
The performance of hybrid rocket engines is significantly influenced by the fuel geometry. Burnback simulations, to determine the fuel surface and fluid volume, are therefore an important tool for preliminary design.
Jan Erik Zeriadtke, Joël Martin, Viola Wartemann   +2 more
doaj   +1 more source