A 53-year-old woman who had undergone aortic valve replacement with a Starr-Edwards (S-E) valve (Model 1260) and open mitral commissurotomy 28 years previously was hospitalized with cardiac failure. Echocardiography showed mitral stenosis, mitral regurgitation, and a normally functioning S-E prosthesis. At reoperation, the mitral and aortic valves were replaced with St Jude bileaflet mechanical...

Preparations for lunar missions involve the extensive use of simulants of lunar surface materials. Since many planned operations engage the mechanical properties of the regolith, it is of utmost importance to assure that the simulants adequately represent the engineering properties of actual lunar materials. To address this critical issue, we are conducting an experimental and modeling effort t...

Lunar meteorites provide a wider sampling of the lunar surface compared to the samples collected during the Apollo and Luna Missions. Apatite is the main hydroxyl-bearing (proxy for water) mineral in lunar samples, especially in basaltic rocks. Apatite is also amenable to in-situ U-Pb age dating studies. The ages of lunar basaltic meteorites also span over a larger range compared to basaltic sa...

Introduction: Lunar meteorites arguably provide a wider sampling of the lunar surface compared to the samples collected during the Apollo and Luna Missions. Apatite is the main hydroxyl-bearing (proxy for water) mineral in lunar samples, especially in basaltic rocks. The ages of lunar basaltic meteorites also span a larger range compared to basaltic samples collected during Apollo and Luna miss...

The lengthy period since the Apollo landings limits present-day engineers attempting to draw from the experiences of veteran Apollo engineers and astronauts in the design of a new lunar lander. In order to circumvent these limitations, content analyses were performed on the voice transcripts of the Apollo lunar landing missions. The analyses highlighted numerous inefficiencies in the design of ...

Introduction: Most of the lunar surface is covered with a thick layer of regolith composed of rock fragments and dust that have evolved through billions of years of constant destructive meteoroid bombardment. From the Apollo mission experiences, it is clear that long term lunar surface experiments and human activities, as anticipated for the Constellation program, must necessarily deal with the...

Description of the effort: We address technology for an optically based power infrastructure in the region extending from Earth to, and including, the lunar surface. The constraints imposed by physical laws are distinguished from constraints imposed by need for maturation of technology. We conclude such an infrastructure is feasible, in a prototypical sense, within 10-40 years. We develop a des...

The Moon is Earth’s nearest neighbor and the only other planetary body that has been visited by human beings. It is believed to have formed through a collision between the young Earth and an impactor ~ 4500 million years ago. The geological history of the Moon seems to be intimately associated with that of our own Earth. Therefore, through lunar studies, we can also gain further understanding o...

Since 1963 Astronomical Observatory of Kyiv National Taras Shevchenko University was the regional centre of occultation coordination. The collected results of observations of lunar occultations of stars and planets during 38 years are compiled in computer database [1]. The base included more than 24 thousand of observation results of 580 observers from 77 sites on The assembled material is anal...

A number of conventional hypotheses relative to the Moon and the terrestrial planets deserve both questioning and unconventional thought based on the profound advances in planetary research in recent years. For example, elemental and isotopic data on the lower mantle of the Moon suggest that lunar origin by Giant Impact is unlikely. The apparent existence of a relatively undifferentiated lunar ...