background: astronauts will be exposed to both chronic space radiation and acute high doses of energetic radiation of solar particle events in long-term deep space missions. the application of radioprotectors in space missions has basic limitations such as their very short time window as well as their acute toxicity and considerable side effects. the aim of the present study was to investigate ...

Title of Dissertation: ANALYSIS AND MITIGATION OF ELECTROMAGNETIC NOISE IN RESONANT CAVITIES AND APERTURES Lin Li, Doctor of Philosophy, 2004 Dissertation directed by: Associate Professor Omar Ramahi, Mechanical Engineering The trend of low voltage in electronics circuits and boards makes them vulnerable to electromagnetic interference (EMI). Furthermore, higher speed (clock rate) leads to fast...

The Reconfigurable Hardware in Orbit (RHinO) project is focused on creating a set of design tools that facilitate and automate design techniques for reconfigurable computing in space, using SRAM-based field-programmable-gate-array (FPGA) technology. In the final year of the project, design tools that have been created to visualize and analyze an FPGA circuit for radiation weaknesses and power i...

Protection of the hematopoietic system from radiation damage, and/or mitigation of hematopoietic injury are the two major strategies for developing medical countermeasure agents (MCM) to combat radiation-induced lethality. In the present study, we investigated the potential of 7, 8-diacetoxy-4-methylthiocoumarin (DAMTC) to ameliorate radiation-induced hematopoietic damage and the associated mor...

this paper presents a new control method for a three-phase four-wire unified power quality conditioner (upqc) to deal with the problems of power quality under distortional and unbalanced load conditions. the proposed control approach is the combination of instantaneous power theory and synchronous reference frame (srf) theory which is optimized by using a self-tuning filter (stf) and without us...

It was unknown if a mitochondria-targeted nitroxide (JP4-039) could augment potentially lethal damage repair (PLDR) of cells in quiescence. We evaluated 32D cl 3 murine hematopoietic progenitor cells which were irradiated and then either centrifuged to pellets (to simulate PLDR conditions) or left in exponential growth for 0, 24, 48 or 72 h. Pelleted cells demonstrated cell cycle arrest with a ...

The use of radiation in medicine is now pervasive and routine. From their crude beginnings 100 years ago, diagnostic radiology, nuclear medicine and radiation therapy have all evolved into advanced techniques, and are regarded as essential tools across all branches and specialties of medicine. The inherent properties of ionizing radiation provide many benefits, but can also cause potential harm...

The flexibility combined with the computational capabilities of FPGAs make them a very attractive solution for space-based computing platforms. However, SRAM-based FPGAs are susceptible to radiation effects, including Single Event Upsets. In order to increase the fault tolerance of FPGA designs, fault mitigation techniques, such as Triple Module Redundancy, can be applied. Such techniques, howe...

Background: Astronauts will be exposed to both chronic space radiation and acute high doses of energetic radiation of solar particle events in long-term deep space missions. The application of radioprotectors in space missions has basic limitations such as their very short time window as well as their acute toxicity and considerable side effects. The aim of the present study was to investigate ...

This tutorial paper provides an overview of design considerations for semiconductor radiation detectors and electronics in high radiation environments. Problems specific to particle accelerator applications are emphasized and many of the presented results originated in extensive studies of radiation effects in large scale particle detectors for the SSC and LHC. Basic radiation damage mechanisms...