Late Quaternary climatic variations on the Latium and Campanian Margin of the Tyrrhenian Sea

A multidisciplinary investigation was carried out on two cores, MC 82-12 (Palinuro intraslope basin) and ML 83-21 (Pontinia intraslope basin), recovered during a cruise carried out in 1983, in the eastern part of the Tyrrhenian Sea, funded by C.N.R. Quantitative analyses of planktonic foraminifers, along with oxygen and carbon stable isotopes analyses, and mineralogical and petrological studies on tephra layers allowed to recognize and date, by means of isotopic stratigraphy, the main climatic events of the Late Quaternary: the Last Glacial Maximum, the Younger Dryas event, as well as Termination IA and IB. The planktonic assemblages recognized in the two cores correlate well between them and with the oxygen isotopic signal, even if there are some discrepancies, related to oceanographic factors other than temperature influencing the foraminifers distributio

Karst landforms in an interior layered deposit within the Coprates Chasma, Mars

The Coprates Chasma forms part of the backbone of the Valles Marineris canyon system. In the westernmost part of the chasma in an embayment on the northern wall a mound of layered material rises from the chasma floor and displays a characteristic dome-shaped morphology. The mineralogical characteristics of the dome and its surroundings have been determined by analysis of the CRISM (Compact Reconnaissance Imaging Spectrometer for Mars) data (image HRL00003752). The unit shows the clear signatures of kieserite, an evaporite mineral also found on Earth. Through analysis of the M.RO. HiRISE (Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment images) we have investigated the dome landforms and the possible processes involved in their formation and shaping in great detail. The analysis shows that the landforms observed clearly indicate the presence of solutional processes that made those karst landforms. The results of our observation also suggest that liquid water must have existed on the dome in the past for long enough for the solution features to be formed, and that the karst landforms investigated exhibit an older erosional age or shorter than the same landforms studied in a similar kieserite dome located within Tithonium Chasma, another graben of the Valles Marineris system

Karst Landforms in a Martian Evaporitic Dome

The Tithonium Chasma is the northern trench of the western troughs of Valles Marineris (Mars). In the eastern part of the canyon system a mountain displaying a dome shape morphology is located. According to OMEGA mineralogical data (OMEGA data orbit 531_3) and further studies the dome appears to consist of magnesium sulphate (kieserite), an evaporitic mineral also found on the Earth. Previous works highlighted the presence of karst-like landforms and morphologies that strongly resemble the evaporitic karst morphologies found on the Earth. Through the analysis of the new MRO HiRISE images we have investigated the Martian landform and the possible processes involved in their formation and shaping in great detail. The analysis carried out show that the landforms observed clearly indicate the presence of solutional processes that also acted in a selective way, highlighting that the Martian dome can be formed of dfferent materials (minerals, grain-size, ect.) with different solutional properties. The results of our observation also suggest that on the dome liquid water must have existed in the past for enough time so that the solution features we investigated could be formed

The effect of the Teamsters Union on small trucking firms in the Boston area

Thesis (M.S.)--Massachusetts Institute of Technology, School of Industrial Management, 1959.Includes bibliographical references (leaves 127-128).by James John Samuel Forese.M.S

Planet Hunting: Searching for Long Period Exoplanets Utilizing the Transiting Exoplanet Survey Satellite and the Hungarian-made Automated Telescope

The science of extra-solar planets (or exoplanets) has taken off in the past three decades or so, and shows no sign of slowing. Astronomers have hopes to eventually be able to measure the abundances of elements in exoplanetary atmospheres in the near future. However, the sample of planets shows a bias towards large, small-orbit planets, likely due to the nature of the methods used to detect them. In this senior thesis, we attempt to address part of this selection bias by developing the methods to detect long-period exoplanets, with periods up to 100 days. We do so by combining the light curves produced from images in the Transiting Exoplanet Survey Satellite (TESS) and the Hungarian-made Automated Telescope-South (HATSouth), and then running a Box-fitting Least-Squares algorithm to look for periodic dips in brightness within that data. The results from that algorithm were then fed into a Random Forest Classifier as features, used to determine which sources may necessitate follow-up observation or analysis. The classifier returned 69 sources as objects of interest, three of which had already been noted by astronomers using data from TESS. We concluded by noting 14 objects of interest on which follow-up observations and analysis would be particularly interesting due to the potential presence of exoplanets

Il respiro della Terra.. Dialogo tra un ragazzo e il suo maestro sulle origini e i misteri del nostro pianeta

LIBRO (PIEMME ED.