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Sedimentation and deposition --- Clearwater Lake (Mo.)

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This master thesis focuses on the development of a solution which makes possible the 3D printing of medicines. In fact, it is very difficult or even impossible to use the pharmaceutical materials with classical 3D printers. For this purpose, a new extrusion head is developed for a FDM 3D printer. The idea behind the new solution is the one of an extruder but very smaller. Such a solution was never mentioned in literature. Consequently, the mechanical, thermal and flow behaviour of the system had to be deeply studied. Once the design was fixed, the first prototype was fabricated. Extrusion tests were performed and the system was approved for one of the pharmaceutical materials. It could thus be integrated on the 3D printer to start the real printing tests.

3D printing --- Medicines --- Polymer extrusion --- Fused Deposition Modelling --- Precision Extrusion Deposition --- Ingénierie, informatique & technologie > Ingénierie mécanique

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The authors have developed models for predicting beach changes applicable to various problems on real coasts. One of them is the contour-line-change model to predict long-term beach changes caused by the imbalance in longshore sand transport, which is a kind of N-line model. Because the calculation of the nearshore current is not needed in this model, and the computational load is small, it has an advantage in the prediction of long-term topographic changes on an extensive coast. However, the handling of boundary conditions becomes difficult when offshore coastal structures are constructed in a complicated manner, and in this regard the so-called 3D model has an advantage. Taking this point into account, the authors developed a morphodynamic model (BG model) by applying the concept of the equilibrium slope and the energetics approach, in which depth changes on 2D horizontal grids are calculated.

Oceanography. --- Sedimentation and deposition --- Mathematical models. --- Deposition and sedimentation --- Sedimentary processes --- Physical geology --- Oceanology --- Thalassography --- Earth sciences --- Marine sciences --- Life Sciences --- Earth Science --- Oceanography --- Environmental Sciences

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Sulfur --- Nitrogen --- Atmospheric deposition --- Forest health --- Great Smoky Mountains National Park (N.C. and Tenn.)

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"The Chesapeake Bay impact structure is a well-documented example of a small group of multi-layer, marine-target impacts formed in continental shelves or beneath epeiric seas. New sedimentological and stratigraphical data and results--mainly from Chesapeake Bay brim cores (Watkins School, Langley, and Bayside)--are compared to and compiled with key crater core data"--

Sedimentation and deposition --- Impact craters --- Geology, Stratigraphic --- Chesapeake Bay (Md. and Va.)