28,093 research outputs found

    Digital image correlation (DIC) analysis of the 3 December 2013 Montescaglioso landslide (Basilicata, Southern Italy). Results from a multi-dataset investigation

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    Image correlation remote sensing monitoring techniques are becoming key tools for providing effective qualitative and quantitative information suitable for natural hazard assessments, specifically for landslide investigation and monitoring. In recent years, these techniques have been successfully integrated and shown to be complementary and competitive with more standard remote sensing techniques, such as satellite or terrestrial Synthetic Aperture Radar interferometry. The objective of this article is to apply the proposed in-depth calibration and validation analysis, referred to as the Digital Image Correlation technique, to measure landslide displacement. The availability of a multi-dataset for the 3 December 2013 Montescaglioso landslide, characterized by different types of imagery, such as LANDSAT 8 OLI (Operational Land Imager) and TIRS (Thermal Infrared Sensor), high-resolution airborne optical orthophotos, Digital Terrain Models and COSMO-SkyMed Synthetic Aperture Radar, allows for the retrieval of the actual landslide displacement field at values ranging from a few meters (2–3 m in the north-eastern sector of the landslide) to 20–21 m (local peaks on the central body of the landslide). Furthermore, comprehensive sensitivity analyses and statistics-based processing approaches are used to identify the role of the background noise that affects the whole dataset. This noise has a directly proportional relationship to the different geometric and temporal resolutions of the processed imagery. Moreover, the accuracy of the environmental-instrumental background noise evaluation allowed the actual displacement measurements to be correctly calibrated and validated, thereby leading to a better definition of the threshold values of the maximum Digital Image Correlation sub-pixel accuracy and reliability (ranging from 1/10 to 8/10 pixel) for each processed dataset

    Application of chiral nuclear forces to light nuclei

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    In these proceedings, we discuss the current status of nuclear bound state predictions based on chiral nuclear interactions. Results of ordinary ss- and pp-shell nuclei and light hypernuclei are shown.Comment: 12 pages, 2 figures, corrected typos in Table 5, version as publishe

    MS – 230: Young Men’s Christian Association of Pennsylvania College Papers, 1867-1872

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    In 1867, President H. L. Baugher appointed Tutor Henry Eyster Jacobs (Class of 62) to chair a student committee to draw up a constitution for an organization through which students could learn about and support Christian missions. March 16, 1867, the Young Men’s Christian Association of Pennsylvania College was formed with Edward S. Breidenbaugh (Class of 1868) as its first president. With an early membership of 40, the association meet monthly, then quickly moved to weekly programs including prayer meetings, bible study, and lectures. Over the years, they supported the work of the Y. M. C.A. of Pennsylvania, several foreign missions, conducted services in the local poorhouse, held public lectures, and worked for temperance The Y.M.C.A. was the precursor to the Student Christian Association that functioned on this campus until 1965 when it merged with the Chapel Council to become one body. Chiefly an organization for inquiry concerning missions, the Y. M. C. A. of Pennsylvania College members wrote letters to foreign missionaries requesting details of mission work. Folder 1 contains letters from missionaries in Indian, Japan, Syria, Turkey, and China, as well as a “home missionary” in St. Louis, Missouri. Some respondents wrote of the importance of the work in general and a few wrote details of their personal missionary work. The rest of the papers contain business correspondence with Executive Committee of the Y.M.C.A. of Pennsylvania and other Y.M.C.A. organizations, as well as letters from local ministers contacted to speak before the group. These records, 1867-1872, are the only extant records of the association until 1946-1965, For those papers, see Record Group 3.4 Office of the Chaplain, Series I: Student Christian Association. Special Collections and College Archives Finding Aids are discovery tools used to describe and provide access to our holdings. Finding aids include historical and biographical information about each collection in addition to inventories of their content. More information about our collections can be found on our website http://www.gettysburg.edu/special_collections/collections/.https://cupola.gettysburg.edu/findingaidsall/1196/thumbnail.jp
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