Rocket plume temperature distribution plays an important role on the heat transfer analysis of launch carriers. Thus, a non-intrusive IR scanner is used in this paper to analyze the influence of spin motion on plume centerline temperature measurements of spinning solid-propellant rockets. Results show that the average error of temperature measurement is below 3.5% even with a 10% error of estim...

In this paper, we consider uplink channel sounding in time division duplex (TDD) orthogonal frequency division multiplexing (OFDM)-based cellular systems. The channel information provided by uplink sounding may be necessary to exploit closed loop transmission techniques in TDD-OFDM systems. However, conventional sounding schemes may suffer from large sounding overhead, significantly restricting...

Custom experiment setups in physics often require control electronics to execute actions and measurements on a small time scale. When further constraints limit the experiment's environment, for example when is inside sounding rocket, conventional network systems will not suffice those because of weight, heat or budget limitations. This paper proposes architecture with resolution less than 1 ns ...

In this paper, we consider a new channel sounding scheme for opportunistic scheduling with the use of reduced channel information in the uplink of orthogonal frequency division multiplexing (OFDM)-based wireless systems. To reduce signaling overhead for the sounding, we propose a two step channel sounding process considering the correlation characteristic in the time and frequency domain; calle...

Wild rocket [Diplotaxis tenuifolia (L.) DC.] belongs to the Brassicaceae family and has its origin in the Mediterranean region. The effect of conventional and integrated cultivation practices on the nutritional properties and benefits of wild rocket [Diplotaxis tenuifolia (L.) DC.] were studied. Bioactive molecules content (vitamin C, quercetin, lutein), antioxidant properties and bioactivity o...

T H E engineering fundamentals, potentialities and problems associated with the alapli,cat'ion .of nuclear energy to rocket propulsion ,have been .reporte.d. 3,4,s,~1,24,2~,2~ Work on nuclear rocket propulsion 'has been underway at the Los Alamos Scientific LaSoratory for a number .o,f years under the code name Project Rover. ~ An inherent advantage of nuclear prop.ulsion is t'he unlimited ener...

The Cosmic Infrared Background Experiment (CIBER) is a suite of four instruments designed to study the near infrared (IR) background light from above the Earth’s atmosphere. The instrument package comprises two imaging telescopes designed to characterize spatial anisotropy in the extragalactic IR background caused by cosmological structure during the epoch of reionization, a low resolution spec...

This paper reports on a small pilot project undertaken during May 2000 at the Department of Information Science, Loughborough University. The study considers student and staff evaluation of two electronic reader products which are available for purchase in the United Kingdom – NuvoMedia’s Rocket eBook (hardware and software) and Glassbook Inc’s Glassbook (software). As the paper concludes, alth...

Abstract In this study, the nucleation and growth characteristics of equiaxed dendrites in near-isothermal solidification experiments, performed during two sounding rocket missions, MAPHEUS-6 7, are investigated. Two samples composition Al–15 wt pct Cu one sample Al–46 Ge were processed microgravity several on ground. situ X-radiography was to observe dynamics microstructure evolution 200 µ m t...