Abstract We developed a modified topography prestack time migration (PSTM) scheme that can improve the imaging resolution by applying effective Q to migration. The computation of traveltime at each location in is based on floating datum smoothed rugged topography. Unlike common quality factor Q, only determines frequency-dependent amplitude and single location, which enables us establish model ...

Aortic root (AoR) components provide synchronous and precise 3D deformation of the aortic root during the cardiac cycle in order to ensure closure and opening of the three leaflets over a lifetime. Any deviation from the natural 3D morphology, such as with AoR annulus dilatation, enlarged sinuses and/or dilatation of the sinotubular junction, as in the case of ascending aortic dilatation, may r...

Three-dimensional (3D) ultrasonography (US) is rapidly gaining popularity as it moves out of the research environment and into the clinical setting. This modality offers several distinct advantages over conventional US, including 3D image reconstruction with a single pass of the US beam, virtually unlimited viewing perspectives; accurate assessment of long-term effects of treatment; and more ac...

Abstract This research focuses on the 2D and 3D geospatial analysis of Ryukyu Trench, a deep-sea trench located in western Pacific Ocean between Japan Taiwan. The aim is to visualize regional differences topography southern (S) northern (N) parts trench. Technically, methodology based using Generic Mapping Tools (GMT) scripting toolset, for modelling General Bathymetric Chart Oceans (GEBCO), Ea...

Although the scanning microwave microscope (SMM) is based on atomic force (AFM), SMM differs from AFM by being able to sense subsurface electromagnetic properties of a sample. This makes promising for in-depth nondestructive characterization nanoelectronic structures. However, raw data are convoluted with sample topography, making it especially challenging quantitative nonplanar In this paper, ...

Overflows play an important role in the downwelling limb of the oceanic thermohaline circulation. In light of the recognition that some overflows are not homogenous but exhibit a vertical density structure, and details of topography influence the pathways of some overflows, the impact of topographic roughness on the product property distribution is explored using the 3D non-hydrostatic spectral...

Indonesian peatlands are one of the largest near-surface pools of terrestrial organic carbon. Persistent logging, drainage and recurrent fires lead to huge emission of carbon each year. Since tropical peatlands are highly inaccessible, few measurements on peat depth and forest biomass are available. We assessed the applicability of quality filtered ICESat/GLAS (a spaceborne LiDAR system) data t...

The tribological behaviour of the bearing surface in hip arthroplasty is greatly influenced by its surface roughness. During cemented hip arthroplasty, bone cement may contaminate the bearing surface. Hence, the aim of this study was to investigate the effect of cement polymerization on a highly cross-linked polyethylene(HCLP) bearing surface as any process influences the surface roughness of t...

Three Dimensional City Model (3DCM) research becomes a hot area in GIS field in recent years. The 3DCM research also has great significance in traffic, land, mine, surveying and mapping, and other fields, especially in urban plan. The difficulty of acquiring 3D data is the key hamper for the development of 3DCM. Airborne LIDAR, which integrates GPS, INS and scanning laser rangefinder, can rapid...

Micromilling is one of the most suitable technologies for the direct manufacturing of freeform micro components as well as for the generation of complex geometries typical of micro mould manufacturing. In this context, a detailed knowledge of the surface topography is fundamental to deal with quality control and tolerances to meet the parts functionality. However, in many cases, the reduced acc...