Instrument fracture is a procedural mishap that prevents efficient cleaning and shaping of the root canal. When bypassing the fracture fails, the fragment must be removed. Many techniques and devices ...have been described to remove fragments from the root canal. The Masserann Kit is a widely used instrument for the removal of fragments. These clinical cases describe use of the Masserann Kit to remove separated instruments blocking the entire canal in posterior teeth.
Researchers have independently documented the effects of land use on rivers and threats to river management institutions, but the relationship between changes in institutional context and river ...condition is not well described. This study assesses the connections between resource management institutions, land use, and rivers by integrating social science, geospatial analysis, and geomorphology. In particular, we measured hydraulic geometry, sediment size distributions, and estimated sediment yield for four rivers in northern Tanzania and conducted semistructured interviews that assessed corresponding resource management institutions. Communities managed rivers through both customary (traditional, nonstate) and government institutions, but the differences in the resource management policies and practices of the study rivers themselves were fairly subtle. Clearer differences were found at broader scales; the four watersheds exhibited substantial differences in land-cover change and sediment yield associated with the location of settlements, roadways, and cultivation. Unexpectedly, these recent land-use changes did not initiate a geomorphic response in rivers. The long history of grazing by domestic and wild ungulates may have influenced water and sediment supplies such that river channel dimensions are more resistant to changes in land use than other systems or have already adjusted to predominant changes in boundary conditions. This would suggest that not all rivers will have the anticipated responses to contemporary land-use changes because of antecedent land-use patterns; over long time scales (centuries to millennia), the presence of grazers may actually increase the ability of rivers to withstand changes in land use. Our findings point to a need for further interdisciplinary study of dryland rivers and their shifts between system states, especially in areas with a long history of grazing, relatively recent changes in land use, and a dynamic social and institutional context.
In this paper we analyse the optimal management of a renewable resource (groundwater) with stock‐dependent extraction cost and a backstop substitute, facing two‐sector linear demands. Application to ...the Kiti region in Cyprus demonstrates the model's performance and is used to test for the difference between optimal and myopic behaviour. It is found that the presence of a backstop resource diminishes the importance of optimal dynamic behaviour, whereas in the absence of backstop the optimal control solution yields a value for social welfare significantly larger than the myopic policy.
This 11th century Byzantine church was erected over
the ruins of an Early Christian basilica. The original apse of the basilica has survived together with one of the finest pieces of Byzantine art, a ...rare 6th century mosaic of Virgin and Child between the two archangels Michael and Gabriel.
This 11th century Byzantine church was erected over
the ruins of an Early Christian basilica. The original apse of the basilica has survived together with one of the finest pieces of Byzantine art, a ...rare 6th century mosaic of Virgin and Child between the two archangels Michael and Gabriel.
Kiti Dam (Tremithos) Υπουργείο Γεωργίας, Αγροτικής Ανάπτυξης και Περιβάλλοντος (Κυπριακή Δημοκρατία), Τμήμα Αναπτύξεως Υδάτων; Ministry of Agriculture Rural Development and Environment (Republic of Cyprus), Water Development Department
1964
Image
Capacity: 1.614.000 m3
Year of Operation: 1964
Type: Eartfill
Category: Largal Dam
Designed by: II Nuovo Castoro, Italy
Constructed by: Water Development Department
Kiti Dam (Tremithos) Υπουργείο Γεωργίας, Αγροτικής Ανάπτυξης και Περιβάλλοντος (Κυπριακή Δημοκρατία), Τμήμα Αναπτύξεως Υδάτων; Ministry of Agriculture Rural Development and Environment (Republic of Cyprus), Water Development Department
1964
Image
Odprti dostop
Capacity: 1.614.000 m3
Year of Operation: 1964
Type: Eartfill
Category: Largal Dam
Designed by: II Nuovo Castoro, Italy
Constructed by: Water Development Department
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