Transition of Space Propulsion and Challenge to the Future -Breakthrough of Propulsion Technology

The distance to a stellar system is very immense, therefore the travel to the fixed star nearest to the Earth using the present propulsion technology will require tens of thousands years. In order to overcome such a limit of the space travel between fixed stars, research and development of a new propulsion theory and navigation theory are indispensable.This paper describes the historical transition and future prospects of space propulsion technology, that is, new space propulsion and space navigation concept (Laser thruster, Continuum mechanics of Space-Time, Space drive propulsion, Hyper-Space navigation etc.) based on the published article so far by author. The prospects of various applications of laser thruster, ion thruster as electric propulsion and solar sail are introduced. A field propulsion which surpasses conventional propulsion is then discussed as well as the possibility of realistic interstellar travel by applying field propulsion to navigation theory.Space propulsion physics such as propulsion theory and navigation theory give us a concrete theoretical method toward galaxy exploration.

Numerical Model and Forecasting Potential of Aircraft Weather Hazards over Kenya

The study investigated the forecasting potential of aircraft weather hazards over Kenya using numerical model. The various causes of accidents/incidents were identified using analyzed investigated weather-related aviation hazards data obtained from Kenya Civil Aviation Authority database system from 2008 through 2014. The parameters analyzed included the Winds, Temperature, Relative humidity, Convective Available Potential Energy (CAPE), Lifted Index (LI) and Dew Point Temperature. Their combined effect was able to provide the means of identifying the areas of strong convection. The model was run on a grid point distance resolution of 10 km and runs finite differencing scheme, based on Taylor series. Grid Analysis and Display System (GrADS) which is embedded on the model upon installation, was used as the default post processing tool. Key findings revealed that Wind, Fog, Turbulence, Heavy rain showers, and low ceiling influenced aircraft operations. It was shown that the majority of the hazards were linked with cumulonimbus clouds. Landing phase of flight affected aviation most.

Novelty Additional Layer Planning A. H. Nasution Road Norht Sumatera with Range with Hrodi Method

Condition of damaged road on A.H.Nasution road to Padang Bulan Which appears: subtle fractures, wavy bits, and descending road surface. All of these are caused by resistance factors from road users that can have an adverse impact on the development of the surrounding area. This paper describes the planning of road surface thickness. Process this plan uses Hot Rolled Overlay Design for Indonesia(HRODI), where the method and outline of planning activities consist of: Data collection and data analysis. The results show that the thickness of the surface layer (ply adjacent) of the path obtained varying results, ranging from 3 cm, 7 cm to 9 cm are mixed HRS (Hot Rolled Sheet) and ATBL (Asphalt Treated Base Leveling).