Effect of welding position on porosity formation in aluminum alloy welds

Program investigates the effects of varied welding positions on weld qualities. Progressive changes in bead geometry occur as the weld plane angle is varied from upslope to downslope. The gravitational effect on the weld puddle varies greatly with welding position

The worsening impacts of land reclamation assessed with Sentinel-1: The Rize (Turkey) test case

Massive amounts of land are being reclaimed to build airports, new cities, ports, and highways. Hundreds of kilometers are added each year, as coastlines are extended further out to the sea. In this paper, this urbanization approach is monitored by Persistent Scatterer Interferometry (PSI) technique with Sentinel-1 SAR data. The study aims to explore this technology in order to support local authorities to detect and evaluate subtle terrain displacements. For this purpose, a large 3-years Sentinel-1 stack composed by 92 images acquired between 07/01/2015 to 27/01/2018 is employed and stacking techniques are chosen to assess ground motion. The test site of this study, Rize, Turkey, has been declared at high risk of collapse and radical solutions such as the relocation of the entire city in another area are been taken into consideration. A media fact-checking approach, i.e. evaluating national and international press releases on the test site, is considered for the paper and this work presents many findings in different areas of the city. For instance, alerts are confirmed by inspecting several buildings reported by the press. Critical infrastructures are monitored as well. Portions of the harbor show high displacement rates, up to 1 cm/year, proving reported warnings. Rural villages belonging to the same municipality are also investigated and a mountainous village affected by landslide is considered in the study. Sentinel-1 is demonstrated to be a suitable system to detect and monitor small changes or buildings and infrastructures for these scenarios. These changes may be highly indicative of imminent damage which can lead to the loss of the structural integrity and subsequent failure of the structure in the long-term. In Rize, only a few known motion-critical structures are monitored daily with in-situ technologies. SAR interferometry can assist to save expensive inspection and monitoring services, especially in highly critical cases such as the one studied in this paper

Sustainable worm control in sheep

Deciding on the best worm control program for your farm can be a complex matter, but guidelines in this article by Robert Wroth should make it simpler

Losses causes by and control of important seed-borne virus diseases affecting productivity of annual pasture legumes.

Trial90V1 and 90W1 Assessment of pasture productivity in subterranean clover pastures infected with SCMV. Location: Woogenellup, Vasse and Wokalup. These trials measure SCMV disease progress, herbage and seed production losses in Woogenellup pasture swards which are: (i) initially artificially infected by using infected transplants in the first year; and ii) naturally infected via seed transmission of the virus in year two. Trials are grazed by sheep throughout the season, maintaining the pasture height at less than 20 cm. Trial 90PE5 Assessment of sensitivity/resistance to subterranean clover mottle virus in selected subterranean clover cultivars. Location: Pemberton Subterranean clover cultivars, recommended for growing in areas where SCMV has been found, and known to be susceptible to the SCMV following sap-inoculation in the glasshouse were assessed for susceptibility to SCMV. Included are measurements of herbage and seed productivity loss due to the disease. Seed transmission of SCMV in newly germinated progeny seedling from infected plants is also examined. Trial 89GL17 The effect of AMV on nodulation of burr medic. To date, there is no information comparing virus concentrations in the nodules and shoots to determine preferred sites for virus multiplication or whether virus concentration declines in shoots and nodules as plants age. The aims of this experiment were to examine which of these factors limited nitrogen fixation in burr medic nodules infected with \u27AMV

Neanderthal plant use and phytolith taphonomy in the Middle Paleolithic of Southwest France

The role of plants in Neanderthal subsistence is less well known than the role of animals due to differences in preservation and a subsequent lack of study. Phytoliths, the silica infillings of plant cells, are more durable than organic components of plants and can be used to reconstruct human activities, local plant ecology, and diagenetic alteration of archaeological sediments. This dissertation, comprising three articles, examines the relationship between Neanderthals and plants during the Middle Paleolithic (ca. 100,000-40,000 BP) of southwest France using phytolith analysis. The first article provides an analysis of the phytoliths recovered from the cave site of Roc de Marsal, relating phytolith concentrations and identifications to environmental change, natural deposition, and Neanderthal pyrotechnology. The analysis of 115 phytolith samples provides evidence for spatial patterning in plant remains related to hearth features and diachronic change in plant use coincident with a shift from warm stadial to cold glacial conditions. The second article applies morphometric statistics to a specific class of phytoliths, grass cells known as bilobates, to understand the range of variation within and among grass genera and to compare these results with an archaeological phytolith assemblage. More than 200 archaeological bilobates from Roc de Marsal are compared with those from seven modern reference specimens to assess these links. The analysis of the modern material indicates that some species are good candidates for morphometrics, but others should be avoided. The range of variation and lack of patterning in the archaeological assemblage suggest that Neanderthals at this site used multiple grass species. The third article presents the analysis of 102 phytolith samples from Pech de l’Azé IV in comparison to those from Roc de Marsal. The two sites are similar in terms of chronology, stratigraphy, artifacts, and preserved combustion features, but there are key differences in the structure/morphology of hearths and phytolith densities. The comparison of these two sites highlights variation in Neanderthal pyrotechnology and fuel use. The analysis also indicates that different phytolith recovery protocols are needed to maximize phytolith extraction due to differences in formation processes between sites and should be evaluated on a site by site basis.2019-11-27T00:00:00

Vincent L. McKusick and the Maine Rules of Civil Procedure: A Thirty-Five Year Perspective

The Editorial Board and Staff of Volume 43 of the Maine Law Review enthusiastically dedicate this issue to Vincent L. McKusick, Chief Justice of the Maine Supreme Judicial Court. Chief Justice McKusick took the oath of office on September 16, 1977, having been appointed the previous month by Governor James B. Longley, and will retire on February 28, 1992. As the following tributes make clear, the contributions he has made to the betterment of state and national legal institutions during his tenure evidence the same qualities of integrity and excellence that have been the hallmarks of his long and distinguished career. We are proud to honor a native son whose labors have so well served the ends of justice

The effects of video modeling on complimentary behaviors towards children with disabilities in typically developing children: A case study

Video modeling has been an effective instructional tool to teach children with disabilities, however, there is less research on the effectiveness of video modeling to teach typically developing children. The participants of this study were two typically developing children, and they were siblings of child with a disability. This study used an ABAB experimental design to graph, and visually determine differences between control and intervention sessions. The purpose of this study was to evaluate the effectiveness of video modeling to teach typically developing children verbal complimentary behaviors in an inclusive physical activity setting. The results of this study found video modeling to be an ineffective tool to teach typically developing children verbal complimentary behaviors. Possible reasons for these results include: participant population, varying social opportunities, and small sample size. Therefore, future research should evaluate the effectiveness of video modeling to teach affective skills to a larger sample size of typically developing children, and evaluate the effectiveness of video modeling to teach this population both gross and fine motor skills