Results 81 to 90 of about 39,755 (280)

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

Meteoritics &Planetary Science, EarlyView.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz   +2 more
wiley   +1 more source

Numerical Method for Chemical Non-Equilibrium Plume Radiation Characteristics of Solid Rocket Motors

Aerospace
The research objectives of engine plume radiation calculation primarily encompass two aspects: (1) addressing the additional heating induced by plume radiation on rocket thermal protection systems and (2) elucidating the variation patterns of spectral ...
Ruitao Zhang, Yang Liu, Yuxuan Zou, Moding Peng, Zilong Wang, Xiaojing Yu   +5 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

A Relational Perspective on Land in Armed Conflict: Analysing the Village Guard Mobilisation in Turkey

Studies in Ethnicity and Nationalism, EarlyView.
ABSTRACT This article examines the Turkish state's Village Guard system, revived in the 1980s as part of its counterinsurgency strategy against the Kurdistan Workers Party (PKK). While often framed as a defensive militia, the Village Guards became central to the state's exceptional governance in Kurdistan, both facilitating military control and ...
Francis O'Connor, Adnan Çelik, Ayhan Işık, Joost Jongerden   +3 more
wiley   +1 more source

Initial stress approach-based finite element analysis for viscoelastic materials under generalized Maxwell model

AIP Advances
This paper introduces a conceptual framework for finite element analysis of generalized Maxwell viscoelastic materials based on the initial stress approach.
Xueren Wang, Yanchao Wang, Hongfu Qiang, Jianfang Bai, Chao Luo, Zhipeng Zhao   +5 more
doaj   +1 more source

Elements of cost comparison for planetary missions with advanced propulsion [PDF]

Cost and performance comparisons are made between chemical propulsion and nuclear electric propulsion for planetary missions at Jupiter and beyond. Nuclear rocket comparisons are made for performance only.
Stearns, J. W.
core   +1 more source

Integrated launch and emergency vehicle system [PDF]

, 1992
A heavy launch vehicle is discussed. The launch vehicle is comprised of an expendable, multi-container, propellant tank that has a plurality of winged booster propulsion modules at one end and a payload supported by adapter structure at the other end ...
Martin, James A.
core   +1 more source

Dynamics model and simulation optimization analysis of single stage water rocket

Results in Physics
The initial launch parameters of water rocket have a significant impact on its flight performance, such as speed and altitude. In this paper, the dynamic equation in the form of parameter increment was obtained through the force analysis of the ascending
Shaozhe Ding, Mengyang Fan, Longbin Liu
doaj   +1 more source

The nuclear thermal electric rocket: a proposed innovative propulsion concept for manned interplanetary missions [PDF]

, 2013
Christian Dujarric, A. Santovincenzo, Leopold Summerer   +2 more
openalex   +1 more source

Ion Propulsion for Spacecraft [PDF]

The theory of the ion-thruster propulsion system is discussed along with the Space Electric Rocket Test 1 and 2. The use of electric propulsion for stationkeeping and attitude control functions of geosynchronous satellites is described, and a comparison ...
Kerslake, W. R.
core   +1 more source