objectives: wheelchairs are the prime mobility aid of persons with spinal cord injuries. manual wheelchair propulsion puts a lot of demand on the cardiopulmonary as well as the skeletal system. the main purpose of the study was to compare the effects of both arm ergometry training and progressive resistance exercise training of upper limbs on resting heart rate and distance covered during wheel...

The interest in interplanetary space travel has stimulated much discussion on the desirability of using nuclear, rather than chemical, energy for the spacecraft propulsion. Comparisons of the relative merits of various propulsion systems have been extensively discussed in the literature. The results of such studies yield a diversity of conclusions, depending on the assumptions which are made in...

Submitted to the Department of Nuclear Science and Engineering in Partial Fulfillment of the Requirements for the Degree of Bachelor of Science in Nuclear Science and Engineering at the Massachusetts Institute of Technology ASSANUSETTS INS E OF TECHNOLOGy June 2013 JUL 1 6 2013 k LBRA RIES Martin Goycoolea. All rights reserved @ The author hereby grants to MIT permission to reproduce and to dis...

In the safeguards agreements between non-nuclear-weaponstate members of the Nuclear Nonproliferation Treaty and the International Atomic Energy Agency, there is a possibility for non-nuclear weapon states, acting with the approval of the agency’s board of governors, to remove from safeguards nuclear materials to be used in non-proscribed military activities such as naval nuclear propulsion. Thi...

a new approach for propulsion system layout that increases power and enhances the efficiency of submarine propulsion system is proposed.using our method,the efficiency and power of the system enhances without increasing volume and weight. this layout improves the performance compared to the usual layout, which employs double-armature motors in cruise speed where efficiency is more critical. thi...

Nuclear fission has been used as a reliable source for utility power in the United States for decades. Even in the 1940’s, long before the United States had a viable space program, the theoretical benefits of nuclear power as applied to space travel were being explored [Humble, et. al.]. These benefits include long-life operation and high performance, particularly in the form of vehicle power d...