Reflectance and color prediction of dental material monolithic samples with varying thickness

2022 ◽  
Author(s):  
María Tejada-Casado ◽  
Razvan Ghinea ◽  
María M. Perez ◽  
Henning Lübbe ◽  
Ioana S. Pop-Ciutrila ◽  
...  
Keyword(s):  
Dental Material ◽  
Varying Thickness ◽  
Color Prediction

Color prediction based on individual characterizations of ink layers and print support

2018 ◽  
Vol 2018 (8) ◽  
pp. 165-1-165-6
Author(s):  
Théo Phan Van Song ◽  
Christine Andraud ◽  
Luis Ricardo Sapaico ◽  
Maria V. Ortiz Segovia
Keyword(s):  
Color Prediction

Elementos fisiológicos y fisiopatológicos en la Fluorosis dental

2018 ◽  
Vol 2 (2) ◽  
pp. 2
Author(s):  
Silvia Alexandra Cáceres Correa ◽  
Elena Hernández Navarro ◽  
Lizette Elena Leiva Suero
Keyword(s):  
Dental Material ◽  
Revisión Sistemática

La Fluorosis dental es una enfermedad grave que implica además un problema estético, caracterizada por una anomalía de las piezas dentales, que es el primer signo de que la persona ha estado expuesta a niveles elevados de flúor, en el Ecuador su prevalencia es mayor en la región andina. Objetivo: Realizar una revisión sistemática y crítica de la literatura sobre la Fluorosis dental. Material y Métodos: Se efectuó una revisión sistemática y crítica de la literatura, usando motores de búsqueda de artículos indexados en Scopus, Latindex, Scielo sobre el tema Fluorosis Dental. Resultados: La revisión sistemática de la Literatura  permitió analizar 20 artículos publicados en revistas indexadas sobre el tema Fluorosis Dental, evidenciándose que es una condición irreversible causada por la ingestión excesiva de fluoruros presentes en el medio ambiente, alimentos, pastas dentales, agua, enjuagues, que afecta no solo a la estética sino fundamentalmente a la formación y maduración normal de las estructuras del esmalte en dentición temporal y definitiva en grupos etarios comprendidos entre 1 - 18 años. Se analizó la documentación y se evidenció que entre los factores determinantes de la salud para esta patología tenían mayor relevancia los biológicos, sociales, medio ambientales y la asistencia sanitaria estableciendo que el patrón común de la patología era el suministro de agua y de ahí su posibilidad de prevención. Por ser el agua la fuente principal de fluoruros y su fluorización, hace varios años, se constituyó en estrategia, asumida por varios países como medio de prevención de caries, hoy por el contrario se prohíbe, al considerar que el consumo de alimentos y bebidas embotelladas, los efectos aditivos de los dentífricos y suplementos fluorados son suficientes y están dentro del límite establecido de aporte al organismo. Conclusiones: La Fluorosis dental puede ser evitable regulando la fluorización del agua de consumo en las comunidades andinas.

scholarly journals Intelligent manufacturing of color blended yarn: Color matching algorithm and manufacturing process through computer numerically controlled ring spinning system

2021 ◽  
Vol 16 ◽  
pp. 155892502110065
Author(s):  
Peng Cui ◽  
Yuan Xue ◽  
Yuexing Liu ◽  
Xianqiang Sun
Keyword(s):  
Intelligent Manufacturing ◽  
Prediction Algorithm ◽  
Ring Spinning ◽  
Blended Yarn ◽  
Spun Yarn ◽  
Computer Numerically Controlled ◽  
Ring Spun Yarn ◽  
High Production ◽  
Color Prediction ◽  
Textile Products

Yarn-dyed textiles complement digital printing textiles, which hold promise for high production and environmentally friendly energy efficiencies. However, the complicated structures of color-blended yarns lead to unpredictable colors in textile products and become a roadblock to developing nonpollution textile products. In the present work, we propose a framework of intelligent manufacturing of color blended yarn by combining the color prediction algorithm with a self-developed computer numerically controlled (CNC) ring spinning system. The S-N model is used for the prediction of the color blending effect of the ring-spun yarn. The optimized blending ratios of ring-spun yarn are obtained based on the proposed linear model of parameter W. Subsequently, the CNC ring-spinning frame is used to manufacture color-blended yarns, which can configure the constituent fibers in such a way that different sections of yarn exhibit different colors.

Exact solution for free vibration analysis of linearly varying thickness FGM plate using Galerkin-Vlasov’s method

2020 ◽  
pp. 146442072098049
Author(s):  
V Kumar ◽  
SJ Singh ◽  
VH Saran ◽  
SP Harsha
Keyword(s):  
Free Vibration ◽  
Variable Thickness ◽  
Vibration Analysis ◽  
Shear Deformation Theory ◽  
Free Vibration Analysis ◽  
Functionally Graded ◽  
Constant Thickness ◽  
Engineering Structures ◽  
Property Variation ◽  
Varying Thickness

The present paper investigates the free vibration analysis for functionally graded material plates of linearly varying thickness. A non-polynomial higher order shear deformation theory is used, which is based on inverse hyperbolic shape function for the tapered FGM plate. Three different types of material gradation laws, specifically: a power (P-FGM), exponential (E-FGM), and sigmoid law (S-FGM) are used to calculate the property variation in the thickness direction of FGM plate. The variational principle has been applied to derive the governing differential equation for the plates. Non-dimensional frequencies have been evaluated by considering the semi-analytical approach viz. Galerkin-Vlasov’s method. The accuracy of the preceding formulation has been validated through numerical examples consisting of constant thickness and tapered (variable thickness) plates. The findings obtained by this method are found to be in close agreement with the published results. Parametric studies are then explored for different geometric parameters like taper ratio and boundary conditions. It is deduced that the frequency parameter is maximum for S-FGM tapered plate as compared to E- and P-FGM tapered plate. Consequently, it is concluded that the S-FGM tapered plate is suitable for those engineering structures that are subjected to huge excitations to avoid resonance conditions. In addition, it is found that the taper ratio is significantly affected by the type of constraints on the edges of the tapered FGM plate. Some novel results for FGM plate with variable thickness are also computed that can be used as benchmark results for future reference.

Influence of anisotropy on creep in functionally graded variable thickness rotating disc

2021 ◽  
pp. 030932472199997
Author(s):  
Kishore Khanna ◽  
Vinay Kumar Gupta ◽  
Neeraj Grover
Keyword(s):  
Axial Direction ◽  
Functionally Graded ◽  
Strain Rates ◽  
Lower Yield ◽  
Rotating Disc ◽  
Creep Response ◽  
Varying Thickness ◽  
Disc Material ◽  
Lower Yield Strength ◽  
Tangential Directions

The study is carried out to develop a mathematical model to analyze creep response of a varying thickness rotating disc made of anisotropic functionally graded 6061Al-SiCw.composite. The thickness and content of reinforcement (SiCw) in the disc are assumed to decrease radially according to power law. The yielding of disc material is according to Hill’s criterion and creeping as per threshold stress based law. The developed model is used to obtain the creep stresses and strain rates in the disc for various types of materials’ anisotropy. The stresses and strain rates are noticed to depend on the materials’ anisotropy. The study reveals that the presence of kind of anisotropy wherein the disc material exhibits lower yield strength toward the radial and tangential directions than the axial direction is beneficial in reducing the creep stresses and creep rates in the disc, in comparison to isotropic FGM disc. An anisotropic FG disc, which has highest and the lowest yield strengths, respectively, along the axial and radial directions shows superior creep response.

Study of modes and deflection for ring shaped plate with varying thickness

2021 ◽  
Author(s):  
Manu Gupta ◽  
Ankit Kumar ◽  
Ajendra Kumar ◽  
Robin ◽  
Anuj Kumar
Keyword(s):  
Varying Thickness

The Base and Top of the Coral-rock in Barbados

1937 ◽  
Vol 74 (8) ◽  
pp. 337-359 ◽  
Author(s):  
C. T. Trechmann
Keyword(s):  
Sea Level ◽  
The South ◽  
The West ◽  
East Part ◽  
Varying Thickness ◽  
South West ◽  
New Information ◽  
Main Portion ◽  
Coral Rock

1. The coral-rock commences nearly everywhere with a basal bed of varying thickness containing a fauna of pre-Pleistocene aspect among which the genus Haliotis (absent from these coasts at the present day), Pleurotomaria, Meiocardia, etc., are noticeable. This faunule may have lived at a depth of 700–1,000 feet.2. The supposition that the southerly anticlines are a later uplift than the main portion of Barbados is supported by the absence of ravines, and the presence of post-coral-rock beds which occur as coastal veneers at low altitudes, and in greater thickness in the south-east corner near Whitehaven.3. The south-east part of the island from Consett Point to Ragged Point has probably extended further seawards in comparatively recent times ; the series of converging faults and dislocations in the cliff sections suggest that the thrusts from the west or south-west may have been resisted by this part of the island.4. The relative claims of fault-scarping or marine erosion in production of the rising terraces is discussed ; and new information regarding the thickness of the coral-rock at sea-level from a boring is detailed.5. The finding of a faunule with Pliocene or possibly Miocene affinities at the base of the coral-rock puts the Oceanic series further back, into the Miocene.

Interest of Raman spectroscopy for the study of dental material: The zirconia material example

IRBM ◽  
2010 ◽  
Vol 31 (5-6) ◽  
pp. 257-262 ◽  
Author(s):  
C. Wulfman ◽  
M. Sadoun ◽  
M. Lamy de la Chapelle
Keyword(s):  
Raman Spectroscopy ◽  
Dental Material
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