Results 71 to 80 of about 38,437 (282)
Exploring the EMCA Community: Strengths, Challenges, and Opportunities
Symbolic Interaction, EarlyView.This work explores the professional experiences, challenges, and collective identity of scholars within the Ethnomethodology and Conversation Analysis (EMCA) community. Through the analysis of survey data from 43 participants, semi‐structured interviews with 10 scholars, and the examination of relevant community documents, this research uncovers how ...
Mehmet Ali Icbay
wiley +1 more source
Design and Test of a Student Hybrid Rocket Engine with an External Carbon Fiber Composite Structure
Aerospace, 2020 The development of hybrid rockets offers excellent opportunities for the practical education of students at universities due to the high safety and relatively low complexity of the rocket propulsion system.
Francesca Heeg +3 more
doaj +1 more source
Spiral Approach for Non‐Software Product and Engineering System Development
Systems Engineering, EarlyView.ABSTRACT This article explored the spiral development process, sometimes called “evolutionary acquisition” in military sectors, and reviewed major non‐software applications in the engineering literature. The spiral development process was originally developed for the design of software while minimizing and managing risk, but the principles can be ...
Isha Amod Gujarathi +2 more
wiley +1 more source
Investigation of Performance Stability of a Nytrox Hybrid Rocket Propulsion System
AerospaceNitrous oxide is a highly suitable oxidizer for hybrid rockets due to its self-pressurizing properties, moderate cost, and high accessibility. However, its vapor pressure and density are highly dependent on ambient temperature, requiring careful ...
Shih-Sin Wei +3 more
doaj +1 more source
Conceptual design of single-stage launch vehicle with hybrid rocket engine using design informatics
Nihon Kikai Gakkai ronbunshu, 2014 A single-stage launch vehicle with hybrid rocket engine has been conceptually designed by using design informatics, which has three points of view, i.e., problem definition, optimization, and data mining.
Kazuhisa CHIBA +4 more
doaj +1 more source
Hybrid rocket performance [PDF]
A hybrid rocket is a system consisting of a solid fuel grain and a gaseous or liquid oxidizer. Figure 1 shows three popular hybrid propulsion cycles that are under current consideration.
Frederick, Robert A., Jr.
core +1 more source
conceptual design and optimization of hybrid rockets
, 2021 A framework was developed to perform conceptual multi-disciplinary design parametric and optimization studies of single-stage sub-orbital flight vehicles, and two-stage-to-orbit flight vehicles, that employ hybrid rocket engines as the principal means of propulsion.
openaire +3 more sources
IET Smart Energy Systems, EarlyView.This review focuses on the recent advances in the key research and technology development of transcritical CO2 heat pumps and integrated energy systems including sustainable ‘green’ heating, energy storage, electro‐thermal storage, waste heat recovery and disruptive electrification of renewable energy, combined heating and power, and new hybrid systems.
Lixin Cheng, Hongzhi Li, Haijun Wang
wiley +1 more source
An observation of LHR noise with banded structure by the sounding rocket S29 Barium-GEOS [PDF]
The measurement of electrostatic and obviously locally produced noise near the lower hybrid frequency made by the sounding rocket S29 Barium-GEOS is reported.
Holmgren, G. +2 more
core +1 more source
E-book readers in higher education [PDF]
, 2003 Ebook readers have received a mixed press, with some hailing them as the future of reading and others believing that they will never be popular. The study outlined here aims to understand the attitudes of, and issues of importance to, lecturers in UK ...
Wilson, R.
core +1 more source