A novel modeling technique for porous tissue scaffolds with targeting the functionally gradient variational porosity with continuous material deposition planning has been proposed. To vary the porosity of the designed scaffold functionally, medial axis transformation is used. The medial axis of each layers of the scaffold is calculated and used as an internal feature. The medial axis is then us...

While glassy materials can be made from virtually every class of liquid (metallic, molecular, covalent, and ionic), to date, formation of glasses in which structural units impart porosity on the nanoscopic level remains undeveloped. In view of the well-established porosity of metal-organic frameworks (MOFs) and the flexibility of their design, we have sought to combine their formation principle...

Laboratory bench tests have shown that porosity reduction increases the fatigue life of bone cement specimens. Clinically, however, the effect porosity reduction is subject to debate. We hypothesized that the discrepancy between clinical and experimental findings is related to differences in the stress distribution, which is typically uniform in experimental test specimens, while stress concent...

Additive manufacturing by laser sintering is able to produce high resolution metal constructs for orthopedic and dental implants. In this study, we used a human trabecular bone template to design and manufacture Ti-6Al-4V constructs with varying porosity via laser sintering. Characterization of constructs revealed interconnected porosities ranging from 15-70% with compressive moduli of 2579-369...

BACKGROUND AND PURPOSE Braided self-expandable stents and flow diverters of uniform construction may develop zones of heterogeneous porosity in vivo. Unwanted stenoses may also occur at the extremities of the device. We studied these phenomena in dedicated benchtop experiments. MATERIALS AND METHODS Five braided devices of decreasing porosity were studied. To simulate discrepancies in diamete...

[1] Model applicability to core-scale solute transport is evaluated using breakthrough data from column experiments conducted with conservative tracers tritium ðHÞ and sodium-22 ðNa Þ, and the retarding solute uranium-232 ðUÞ. The three models considered are single-porosity, double-porosity with single-rate mobile-immobile mass-exchange, and the multirate model, which is a deterministic model t...

Lithofacies classification is a process to identify rock lithology by indirect measurements. Usually, the processed manually an experienced geoscientist. This research presents automated lithofacies using machine learning method increase computational power in shortening process's time consumption. The support vector (SVM) algorithm has been applied successfully Damar field, Indonesia. input va...

This research examined the types and characteristics of soil, including porosity, water content, void ratio, degree saturation to value infiltration rate in soil located western part Semarang City, Indonesia. The test was carried out at 49 measurement points, based on a 2×2 km 2 grid division area. field using turf-tech infiltrometer. data from results were calculated estimation model Kostiakov...

The use of porosity to modify the functional properties of piezoelectric ceramics is well known in the scientific literature as well as by the industry, and porous ceramic can be seen as a 2-phase composite. In the present work, examples are given of applications where controlled porosity is exploited in order to optimise the dielectric, piezoelectric and acoustic properties of the piezoceramic...

Mercury intrusion is frequently used for the characterization of porous materials, giving assess to parameters such as porosity and pore size distribution as well as density (skeletal and bulk). In the pulp and paper technology field, measurements of wood porosity are important, for instance to anticipate the liquor impregnation ability in the pulping stage. With regard to pulp and paper, poros...