Results 71 to 80 of about 481,980 (190)

Assembly vs. direct launch of transfer vehicles [PDF]

open access: yes
A top level assessment is performed of the relative impacts of on-orbit assembly of the lunar or Mars transfer vehicles versus direct launch. The objective is to identify the major option paths for the Earth-to-orbit, ETO, transportation systems.
Katzberg, Stephen J.   +1 more
core   +1 more source

Pengaruh Kendaraan Berat terhadap Polusi Suara dan Getaran di Pita Getar [PDF]

open access: yes, 2017
Increasing transportation mode becomes the increase of vehicles on the roads, it will impact to the pollution. The phenomena that appear in the last few years in the study areas is the rumble strips one solution for management transportation to give ...
Idham, M. (Muhammad)
core  

Analysis of operation and emission characteristics of refrigerated-vehicles based on remote technology

open access: yesHeliyon
Remote online monitoring technology is an effective method for tracking in-use diesel vehicles. Based on remote data from the OBD system, this study compares and analyzes the operation characteristic, emissions and fuel consumption of light-, medium ...
Xionghui Zou   +6 more
doaj   +1 more source

Impact coefficient of tied arch bridges considering heavy transport vehicles [PDF]

open access: yesArchives of Civil Engineering
Analyzing the impact coefficient of tied arch bridges considering heavy transport vehicles is important for safety assessment. There are few studies on the vehicle-bridge coupled dynamic analysis involving heavy transport vehicles passing through bridges.
Shu-Qi He, De-Jian Li
doaj   +1 more source

Real Energy Efficiency of Road Vehicles

open access: yesEnergies
There is an urgent need for a method of evaluating the real energy performance of vehicles that eliminates the effects of external conditions (topography, altitude, and road conditions) and human factors (driving styles), especially in the case of heavy ...
Óscar S. Serrano-Guevara   +2 more
doaj   +1 more source

Research in Self-Boosting Disc Brakes for Heavy Vehicles

open access: yesМеханика машин, механизмов и материалов, 2008
Development of the analytical and practical scientific decisions is considered in the paper to increase the efficiency of automotive brake systems due to reduction of hysteresis losses and creation of perspective disk brake designs with self-boosting ...
D.V. Tretsiak
doaj  

Two lighter than air systems in opposing flight regimes: An unmanned short haul, heavy load transport balloon and a manned, light payload airship [PDF]

open access: yes, 1975
Lighter Than Air vehicles are generally defined or categorized by the shape of the balloon, payload capacity and operational flight regime. Two balloon systems that are classed as being in opposite categories are described.
Pohl, R. A.
core   +1 more source

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