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Bassam Hassan,Marcus Greven,Daniel Wismeijer 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.5
PURPOSE. To integrate extra-oral facial scanning information with CAD/CAM complete dentures to immediately rehabilitate terminal dentition. MATERIALS AND METHODS. Ten patients with terminal dentition scheduled for total extraction and immediate denture placement were recruited for this study. The patients were submitted to a facial scanning procedure using the in-office PritiMirror scanner with bite registration records in-situ. Definitive stone cast models and bite records were subsequently submitted to a lab scanning procedure using the lab scanner (iSeries DWOS; Dental Wings). The scanned models were used to create a virtual teeth setup of a complete denture. Using the intra-oral bite records as a reference, the virtual setup was incorporated in the facial scan thereby facilitating a virtual clinical evaluation (teeth try-in) phase. After applying necessary adjustments, the virtual setup was submitted to a CAM procedure where a 5-axis industrial milling machine (M7 CNC; Darton AG General) was used to fabricate a full-milled PMMA immediate provisional prosthesis. RESULTS. Total extractions were performed, the dentures were immediately inserted, and subjective clinical fit was evaluated. The immediate provisional prostheses were inserted and clinical fit, occlusion/articulation, and esthetics were subjectively assessed; the results were deemed satisfactory. All provisional prostheses remained three months in function with no notable technical complications. CONCLUSION. Ten patients with terminal dentition were treated using a complete digital approach to fabricate complete dentures using CAD/CAM technology. The proposed technique has the potential to accelerate the rehabilitation procedure starting from immediate denture to final implant-supported prosthesis leading to more predictable functional and aesthetics outcomes.
Verification of Reduced Order Modeling Based Uncertainty/Sensitivity Estimator (ROMUSE)
Bassam Khuwaileh,Brian Williams,Paul Turinsky,Donny Hartanto 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.4
This paper presents a number of verification case studies for a recently developed sensitivity/uncertaintycode package. The code package, ROMUSE (Reduced Order Modeling based Uncertainty/SensitivityEstimator) is an effort to provide an analysis tool to be used in conjunction with reactor core simulators,in particular the Virtual Environment for Reactor Applications (VERA) core simulator. ROMUSE has beenwritten in Cþþ and is currently capable of performing various types of parameter perturbations andassociated sensitivity analysis, uncertainty quantification, surrogate model construction and subspaceanalysis. The current version 2.0 has the capability to interface with the Design Analysis Kit for Optimizationand Terascale Applications (DAKOTA) code, which gives ROMUSE access to the various algorithmsimplemented within DAKOTA, most importantly model calibration. The verification study isperformed via two basic problems and two reactor physics models. The first problem is used to verify theROMUSE single physics gradient-based range finding algorithm capability using an abstract quadraticmodel. The second problem is the Brusselator problem, which is a coupled problem representative ofmulti-physics problems. This problem is used to test the capability of constructing surrogates viaROMUSE-DAKOTA. Finally, light water reactor pin cell and sodium-cooled fast reactor fuel assemblyproblems are simulated via SCALE 6.1 to test ROMUSE capability for uncertainty quantification andsensitivity analysis purposes
Surrogate based model calibration for pressurized water reactor physics calculations
Bassam A. Khuwaileh,PAUL J. TURINSKY 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.6
In this work, a scalable algorithm for model calibration in nuclear engineering applications is presentedand tested. The algorithm relies on the construction of surrogate models to replace the original modelwithin the region of interest. These surrogate models can be constructed efficiently via reduced ordermodeling and subspace analysis. Once constructed, these surrogate models can be used to performcomputationally expensive mathematical analyses. This work proposes a surrogate based model calibrationalgorithm. The proposed algorithm is used to calibrate various neutronics and thermal-hydraulicsparameters. The virtual environment for reactor applications-core simulator (VERA-CS) is used tosimulate a three-dimensional core depletion problem. The proposed algorithm is then used to constructa reduced order model (a surrogate) which is then used in a Bayesian approach to calibrate the neutronicsand thermal-hydraulics parameters. The algorithm is tested and the benefits of data assimilationand calibration are highlighted in an uncertainty quantification study and requantification after thecalibration process. Results showed that the proposed algorithm could help to reduce the uncertainty inkey reactor attributes based on experimental and operational data.
CROPWAT 모델을 이용한 기후 변화에 따른 이라크의 밭작물 관개용수량 및 관개계획 모델링
( Bassam Mohammed Hussein ),남원호 ( Won-ho Nam ) 한국농공학회 2019 한국농공학회 학술대회초록집 Vol.2019 No.-
The objective of this study is to determine the impacts of potential climate change on daily and total crop water requirement (CWR) of citrus trees in Iraq (Three provinces; Baghdad, Sallah Aldeen, Wasit) using crop modeling (CROPWAT 8.0) in conjunction with the climate scenarios derived GCMs. Baseline climate is based on the 30 years period from 1989 to 2019 of the mean daily normal, and two time periods in the future years (2020 to 2050). The climate parameters of the temperature, precipitation, relative humidity, sunshine duration and wind speed were downscaled using the GCMs methods. To determine the future crop water requirements (CWR), the CROPWAT model (FAO, 1992) was used to simulate the daily and the season total CWR and irrigation requirements for the present and the future decades. Crop evapotranspiration (ET) and Reference crop evapotranspiration (ET) for crop were determined using CROPWAT 8.0. The enable efficient use of water and better irrigation practices irrigation scheduling as the supply of water through rainfall is limited in these areas. The study will show that effective water requirement and irrigation scheduling for the crop (citrus tree) in Iraq. the first results show for historical 30 years to Baghdad station the total Etc (1442.3mm/dec) and the total effective rainfall (143.5mm/dec) and the total water irrigation requirement is (1298.8mm/dec) for 12 months to citrus trees. Hence irrigation requirement is needed to satisfy crop water requirement. That lead us the effective water is enough to compensate crop water requirement and the how much we need water for irrigation during the season or during the growth and optimum yield and extension and increase the orchard (citrus trees) without any economic loss. The main problem irrigation in Iraq includes declining of water quality, shortage of water resources after new dams along two rivers in Turkey and Syria are developed, climate changes and low water productivity in the unit area. This study will give us the great knowledge in water requirement and irrigation scheduling to get a high production and horizontal expansion. The CROPWAT model allows the development of irrigation schedule for different management conditions and the calculation of scheme water supply for different areas under different crops.