Manganese-coated IRIS to document reducing soil conditions

Iron-coated indicatorof reduction in soils (IRIS) devices have been used for nearly two decades to help assess and document reducing conditions in soils, and official guidance has been approved for interpreting these data. Interest in manganese (Mn)-coated IRIS devices has increased because Mn oxides are reduced under more moderately reducing conditions than iron (Fe) oxides (which require strongly reducing conditions), such that they are expected to be better proxies for some important ecosystem services like denitrification. However, only recently has the necessary technology become available to produce Mn-coated IRIS, and the need is now emerging for guidance in interpreting data derived from Mn IRIS. Ninety-six data sets collected over a 2-yr period from 40 plots at 18 study sites among eight states were used to compare the performance of Mn-coated IRIS with Fe-coated IRIS and to assess the effect of duration of saturation and soil temperature as environmental drivers on the reduction and removal of the oxide coating. It appears that the current threshold prescribed by the National Technical Committee for Hydric Soils for Fe-coated IRIS is appropriate for periods when soil temperatures are warmer (\u3e11 °C), but is unnecessarily conservative when soil temperatures are cooler (5–11 °C). In contrast, Mn-coated devices are particularly useful early in the growing season when soil temperatures are cool. Our data show that when using a threshold of 30% removal of Mn oxide coatings there is essentially 100% confidence of the presence of reducing soil conditions under cool (\u3c11 °C) conditions

Metastatic breast carcinoma of the masseter: Case report

Skeletal muscle metastases are considered quite unusual.1-3 Autopsy series have reported incidences of 0.8%4 to 52.4%,5 depending on the number of muscles and type of malignant neoplasms studied, but clinically apparent involvement is very rare.1,6,7 The literature consists mainly of isolated case reports.1-3,6-13. Clinical presentation of intramuscular metastases is nonspecific. Diagnosis is established by microscopic examination, which reveals nodular1,14 or diffuse3,5-8,10,15 infiltration of the connective tissue between muscle bundles by neoplastic cells. A case of metastatic breast carcinoma presenting as a firm enlargement of the masseter is reported. The histology of the lesion was unusual, as neoplastic cells were seen infiltrating individual myofibers. © 1992

Software development for the digital processing of existing's roads geometric allignment

173 σ.Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η εύρεση των γεωμετρικών χαρακτηριστικών υφιστάμενης οδού και συγκεκριμένα η εύρεση της οριζοντιογραφίας και της μηκοτομής αυτής , μέσω των συντεταγμένων (Χ,Υ,Ζ) τοπογραφικής αποτύπωσης, με σκοπό την υποβοήθηση του ελέγχου οδικής ασφάλειας. Δημιουργήθηκε ένα νέο πρόγραμμα σε κώδικα FORTRAN που επεξεργάζεται την τρισδιάστατη πληροφορία του τοπογραφικού υποβάθρου της υφιστάμενης οδού και με τη βοήθεια στατιστικών μεθόδων (μέθοδος γραμμικής παλινδρόμησης) παράγεται η οριζοντιογραφία και η μηκοτομή της , με την καλύτερη δυνατή προσέγγιση. Το πρόγραμμα αυτό αποτελεί επέκταση του λογισμικού οδοποιίας Η12 και η λειτουργία του βασίζεται στις βασικές αρχές του γεωμετρικού σχεδιασμού των οδών, καθώς και σε έναν αριθμό απλοποιήσεων και παραδοχών.The object of this paper is to find the existing road geometric characteristics, namely to find the horizontal and vertical allignment, through the road surveying coordinates (X,Y,Z) in order to assist the road safety audit. A new program in FORTRAN code, which processes the information of three-dimensional topographic background of an existing road, extracts the orizontal and vertical allignment, approached as accurate as possible by using statistical methods (linear regression). This program is an extension of the road design software H12 and its operation is based on the principles of geometric road design, as well as a number of simplifications and assumptions.Άγγελος Α. Βασιλά

Subpontic osseous hyperplasia: report of two cases

Subpontic osseous hyperplasia is a non-neoplastic growth of bone under the pontics of fixed partial dentures, whose pathogenesis is unknown. It is considered a common, not well-known and under-diagnosed lesion. Its clinical and radiographic features are diagnostic, and its recognition will help avoid diagnostic or therapeutic procedures unnecessary to the patients. We present two cases of subpontic osseous hyperplasia and discuss its differential diagnosis and current concepts on pathogenesis and management. © 2017 The British Association of Oral Surgeons and John Wiley & Sons Lt

Mn-Coated IRIS to Document Reducing Soil Conditions

Iron-coated indicator of reduction in soils (IRIS) devices have been used for nearly two decades to help assess and document reducing conditions in soils, and official guidance has been approved for interpreting these data. Interest in manganese (Mn)-coated IRIS devices has increased because Mn oxides are reduced under more moderately reducing conditions than iron (Fe) oxides (which require strongly reducing conditions), such that they are expected to be better proxies for some important ecosystem services like denitrification. However, only recently has the necessary technology become available to produce Mn-coated IRIS, and the need is now emerging for guidance in interpreting data derived from Mn IRIS. Ninety-six data sets collected over a 2-yr period from 40 plots at 18 study sites among eight states were used to compare the performance of Mn-coated IRIS with Fe-coated IRIS and to assess the effect of duration of saturation and soil temperature as environmental drivers on the reduction and removal of the oxide coating. It appears that the current threshold prescribed by the National Technical Committee for Hydric Soils for Fe-coated IRIS is appropriate for periods when soil temperatures are warmer (\u3e11 °C), but is unnecessarily conservative when soil temperatures are cooler (5–11 °C). In contrast, Mn-coated devices are particularly useful early in the growing season when soil temperatures are cool. Our data show that when using a threshold of 30% removal of Mn oxide coatings there is essentially 100% confidence of the presence of reducing soil conditions under cool (\u3c11 °C) conditions