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Jul 3, 2019
07/19
by
Bond, R. L. (Raymond Leslie)
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xi, 311 pages 24 cm
Topics: Carbon, Porosity, Carbon, Porosity, Carbon, Practice Guideline
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Hey Lovlies!! This is my Low porosity hair rant. My hair can be a challenge to deal with at times and this video was me releasing a little steam. Me and shampoo have not been getting along lately and its been so frustrating!! I have not a come across to many videos addressing this problem. Does anyone else Hate shampoo? If you have any suggestion,solutions or questions please feel free to drop a comment below. Also Share,Like and HIT That BELL if you found this video helpful! Hair Details:...
Topics: signs of low porosity hair, low porosity hair characteristics, high porosity hair care regimen, low...
Petroleum exploration and production from shale formations have gained great momentum throughout the world in the last decade. Producing hydrocarbons from shale is challenging because of the low porosity and permeability thus requiring fracturing completion, whose successes rely on the knowledge of rock properties and insitu stress. It is imperative to investigate and understand the rock geomechanics in the shale formations. To the best of our knowledge, the freezing method is the most...
Topics: Rock Porosity, Freezing of Rock, Rock Porosity Change
iii, 118 p. :
Topics: Gas flow, Porosity
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Jun 26, 2011
06/11
by
NON
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Ethynyl terminated imidothioethers (ETIs) are prepared by the reaction of a dimercaptan, such as 4,4'-dimercaptodiphenyl ether, and an ethynyl containing maleimide, such as N-(3-ethynylphenyl)maleimide. Blends of thse ETIs and ethynyl terminated polymeric materials, such as ethynyl terminated sulfones and ethynyl terminated arylene ethers, are also prepared. These resin blends exhibit excellent processability, and the cured blends show excellent fracture toughness and solvent resistance, as...
Topics: BEADS, HALIDES, POROSITY, PATENTS
"NTS 083L, 083K, 083J, 083I, 083H, 083G, 083A, 072M, 082I."
Topics: Bituminous coal, Porosity, Coal
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May 6, 2010
05/10
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Tobias, C. W., et al
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No Abstract Available
Topics: DYNAMIC CHARACTERISTICS, ELECTRODES, POROSITY
In the current research work the optimization of process parameters of an aluminium alloy diecasting operation is discussed. The major defect causing quality issue during the manufacturing of a die casted component was identified as porosity. An analysis of variance (ANOVA) is carried out to trace the parameters with significant effects on porosity. The plunger pressure used in the die casting machine the liquid aluminium temperature are identified as significant factors after ANOVA. Afterwards...
Topics: Optimisation, ANOVA, Porosity & Regression Analysis
Alumina is a bioceramic material used in the biomedical area as implants and as drug delivery material; it is considered an inert material, presenting good mechanical properties. Drug delivery is the process of transporting and releasing drugs into the human body in a controlled manner. Due to its characteristics, alumina was chosen as a carrier, since it must have adequate porosity to store and release the drug when implanted or grafted. Starch was used as a sacrificial material to improve...
Topics: Alumina, Drug Delivery, Implants, Porosity.
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The main goal of this investigation is to develop a strong and durable pervious cement concrete (PCC) mix using different materials like Granite powder, Marble powder, Tile powder and Gypsum powder as a replacement of cement. In addition, it was aimed to compare the properties of these PCC mixes to lay concrete pavers.The properties such as compressive, flexural and Tensile strength tests were performed.
Topics: pervious, pavement, porosity, skid resistance.
The surface treatments are performed in dental implants in order to increase the chemical and mechanical connection between the implant and bone, favoring the stability of implant-supported prostheses. The aim of this study was to characterize dental implant surfaces treated with 37% phosphoric acid. Implant surfaces were evaluated divided into groups of fifty samples being distributed in: porcelain samples without treatment; metal samples without treatment; porcelain samples with treatment...
Topics: Dental implants, phosphoric acid, porosity.
Scaffolds are artificial structures that replace the natural extracellular matrix (ECM). Scaffolds are capable of supporting three dimensional tissue formations. The natural ECM performs functions, like regulating intercellular communication along with providing support to the cells. A variety of fabricating methods are adopted for preparing scaffolds from a wide range of available biomaterials. The scaffolds thus produced can function as a successful scaffold only if they satisfy the necessary...
Topics: Biodegradability, Cytotoxicity, Porosity, Proliferation, Scaffolds.
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Jul 9, 2010
07/10
by
Eastwood, La Verne Winfield, 1904-
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Bibliography: p. 92-96
Topics: Aluminum founding, Porosity, Aluminium, Porosité
As a civil engineer and human being it’s our prime duty prime to save environment, because lack of water absorption and air permeability of common concrete pavement, rain water is not entered in to the ground directly. It will reduce ground water table, plants are difficult to grow normally, difficult to maintain temperature and humidity of earth. To minimize such affects, the research on pervious concrete pavement widely done for road way application. In this study, determine...
Topics: Compressive Strength, Pervious Concrete, Porosity etc.
Raichur district is located in the northern region of Karnataka state, which is drought prone and falls in the arid tract of the country. The climate of the district is characterized by dryness for the major part of the year and a very hot summer. The low and highly variable rainfall renders the district liable to drought. Hence, increasing the soil water‐holding capacity has been a major issue in this area. This study was conducted to find the threshold limit of SOC with respect to soil...
Topics: WHC, Porosity, Infiltration, Aggregation and SOC
Journal of Research of the National Bureau of Standards
Topics: porosity, thoria, Young's modulus, shear modulus, temperature
Pervious concrete is one of the effectual concrete pavement mixes to address a number of important environmental issues, such as recharging groundwater and reducing storm water runoff. Pervious concrete is produced by eliminating most or all of the fine aggregate in the mix, which allows unified void spaces to be formed in the hardened matrix. These interconnected void spaces allow the concrete to transmit water at relatively high rates. 10mm, 20mm, 40mm maximum size aggregates and 43 grade OPC...
Topics: Pervious Concrete, Compressive Strength, Density, Porosity & Permeability
Crude oil reservoirs have different formation types according to their environmental and geological conditions. Sandstone is one of the most common formations of crude oil reservoir, which has high oil bearing capacity than carbonate formation. In this research article, oil field sandstone was collected and analysed through porosity and permeability. The sandstone was visually observed for the classification of sandstone. The porosity of the sandstone was determined by porosimeter equipment and...
Topics: Carbonate, Permeability, Porosity, Recovery, Sandstone & Water Flooding
The nanocrystalline particles of Aluminium Al doped nickel Ni ferrites with general formula NiAlxFe2 xO4 x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were synthesized by sol gel auto combustion technique. The formation of single phase cubic spinel was confirmed by X ray diffraction analyses. Morphological features of the samples are studied by Scanning Electron Microscopy SEM to examine the particle size, shape and homogeneity of sample. The magnetic hysteresis graphs were obtained to understand their...
Topics: Sol-gel, Crystallize Size, Porosity, Magnetic Properti
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1.0
Jan 12, 2021
01/21
by
Bakhronov Koshim Shayimovich | Khudoiberdieva Nazora Sharofovna | Yunusova Sitora Tolib qizi
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The results of experimental studies on the study of the expansion of the fluidized bed are presented. It is noted that the general picture of the expansion of the fluidized bed of polydisperse granular materials differs from monodisperse systems, and at the same time the porosity value of the pseudo-fluidized bed corresponds to the results of calculations according to the equations available in the literature Bakhronov Koshim Shayimovich, Khudoiberdieva Nazora Sharofovna and Yunusova Sitora...
Topics: fluidized bed, polydisperse granular materials, porosity, equtions
iii, 98 leaves : 28 cm
Topics: Gas wells -- Testing, Reservoir oil pressure -- Testing, Porosity
Design optimization casting emergency stop valve steam turbine, has been done with casting simulation using Magmasoft v5 software. By simulation, some casting design parameters are changed to get more optimal results. Optimization of the design of castings in this study, obtained by improving the design through changes in pouring system using bottom pouring and optimization of riser design. The result of four design casting simulation ESV housing versus filling velocity, solidification, and...
Topics: Design optimization, Casting simulation, Filling Velocity, Solidification, Porosity.
Mendeley Climate Change Library
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Jul 5, 2019
07/19
by
María A. Díaz; Horacio E. Bown; Juan P. Fuentes; Amanda M. Martínez
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Carbon dioxide (CO2) and methane (CH4) are greenhouse gases (GHG), which sustained increase in the atmosphere contribute to global warming and climate change. The GHG fluxes of soils are strongly controlled by water content, temperature, plant and microbial communities and soil management. The Chilean sclerophyllous ecosystem is a global biodiversity hotspot historically and increasingly threatened by human activity. The aim of this study was to compare soil CH4 (and CO2) fluxes, under...
Topics: Air filled porosity, Carbon dioxide, Methane, Sclerophyllous, Soils
Journal of Research of the National Institute of Standards and Technology
Topics: dissolution rate, calcium phosphate cement, mannitol crystal, porosity
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221
Jun 19, 2010
06/10
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Bakalyuk, Ya. KH.; Kadaner, L. I.; Masik, A. KH.; Peregudov, F. M
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Increased cohesive strength of metallic coatings by preliminary passivation
Topics: COHESION, METAL COATINGS, PASSIVITY, POROSITY, COHESION, METAL COATING
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May 30, 2011
05/11
by
Chuang, Kathy C.; Meador, Mary Ann B.; HardyGreen, DeNis
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This viewgraph presentation gives an overview of the structure-property relationship in high glass transition temperatures (T(sub g)) thermosetting polyimides. The objectives of this work are to replace MDA in PMR-15 with 2,2-substituted benzidine and to evaluate the thermo-oxidative stability and mechanical properties of DMBZ-15 against PMR-15. Details are given on the T(sub g) of polyimide resins, the x-ray crystal structure of 2,2-Bis(trifluoro)benzidine (BFBZ), the isothermal aging of...
Topics: POROSITY, AIRFOILS, COMPUTERIZED SIMULATION, LIFT AUGMENTATION, STATORS, NOISE REDUCTION
Many issues are involved in laser welding of any kind of aluminum alloy, in addition to typical ones addressed when considering conventional welding techniques. The aim of this paper is to give a comprehensive view about key-hole related dynamics as well as possible ways to enhance joint quality in disk-laser welding of 2024 aluminum alloy
Topics: Aluminum Alloy, Laser Welding, Disk-laser, Porosity, Key-hole
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3D modelling has been used to gain understanding of reservoir uniqueness in Awe field, Eastern Niger Delta. A qualitative and quantitative approach was adopted to characterize and model the hydrocarbon bearing sands in the study area. Deviation/survey data, 3D seismic volume, wireline logs for five wells and checkshot data were used for this study. Reservoir zone G and I were delineated and correlated across the 5 wells using reservoir modelling software. The deterministic model adopted...
Topics: Deterministic model, Porosity, Permeability, Channel fill, Shoreface, Niger Delta
The present study is to investigate the heat transfer enhancement in a cylindrical heat exchanger using porous media. The heat exchanger is modelled by a cylindrical cavity (Shell) with inlet and outlet thermally insulated ports and five tubes which contain hot water and cold water flows in shell. The effect of porosity on heat transfer enhancement is studied at different mass flow rate 0.15, 0.2, 0.25 and 0.30 Kg/sec. The study about effect of porosity on heat transfer enhancement is done by...
Topics: Porous medium, Heat exchanger, CFD, porosity, mass flow rate.
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Jun 19, 2010
06/10
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Nagler, R. G
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Conductive heat transfer in porous carbonaceous chars of degraded phenolic nylon sample
Topics: CHARRING, CONDUCTIVE HEAT TRANSFER, NYLON (TRADEMARK), POROSITY, CHAR, NYLON
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This study analyzes and evaluates the petrophysical responses of the reservoir sands of ‘B’ field, onshore western Niger Delta. Petrophysical parameters such as permeability, porosity, net-to-gross, water saturation, volume of shale, and reservoir thickness were derived from well logs and their distributions across the reservoir were evaluated with the use of cross-plot relationship to characterize the petrophysical distribution of the study field. T he average of computed gamma ray...
Topics: Petrophysics, well logs, correlation, porosity, permeability, Greater Ughelli depobelt.
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1.0
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x, 299 p. : 25 cm
Topics: Groundwater flow -- Mathematical models -- Congresses, Porosity -- Mathematical models -- Congresses
Journal of Research of the National Institute of Standards and Technology
Topics: calcium phosphate, absorption, calcium phosphate cements, mechanical properties, porosity
Metal foam development is being very challenging process due to the problems incurred during the processing. Various methods have been developed since the 1950’s but the commercialization of these processes are still not possible, because of the foams obtained are of inconsistent properties, cost of production, non homogeneous distribution of pores. Obtaining the near net shape (NNS) is another problem in the metal foam production. Although lot of problems involved in the development of metal...
Topics: Al Foams, Density, NaCl, Porosity, Space Holder, Sand Balls
Journal of Research of the National Bureau of Standards
Topics: porosity, elastic properties, resonance method, Young's modulus, thoria specimen
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419
Jun 17, 2010
06/10
by
Wright, R. H
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No Abstract Available
Topics: BLOCKING, OPTIMIZATION, PERFORATION, POROSITY, TRANSONIC SPEED, TRANSONIC WIND TUNNELS
Self-compacting concrete (SCC) is relatively a recent development in the construction world. SCC is defined basically by two properties: Deformability and segregation resistance. It flows under its own weight while remaining homogeneous in composition. This research is aimed at examining the feasibility of using Rice Husk Ash as supplementary cementations material. In this research, the main variables are the proportion of rice husk ash (0%, 10%, 15%, 20%) and cement content.All the results...
Topics: RHA, SCC, Split Tensile strength, Compressive strength, Porosity, Civil Engineering
Porosity is a measure of the void spaces in a material and is a fraction of the volume voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Many methods have been developed for determining porosity. Most of the methods developed have been designed for small samples, it is the need to determine the bulk volume, pore volume and the volume of its solid matrix for the sample. The direct and indirect methods are based on volume determination and measuring of some...
Topics: Measuring Porosity, CFD, Fuzzy Logic Control System & Aerodynamic Sensor
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8.0
Mar 23, 2020
03/20
by
ACI Avances en Ciencias e Ingenierías
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Influence of the scale range width on the determination of the hydraulic conductivity and effective porosity. The case of a porous aquifer in southern italy Influencia de la amplitud del intervalo de escala en la determinación de la conductividad hidráulica y la porosidad efectiva. El caso de un acuífero poroso del sur de italia Carmine Fallico, Samuele De Bartolo, María Fernanda Rivera-Velásquez, Mario Ianchello *Autor para correspondencia/Corresponding author: carmine.fallico@unical.it...
Topics: Scaling law, Hydraulic conductivity, Effective porosity, Laboratory measurement, Field measurement.
In this research the effect of porosity is studied at three different holding times(1.5, 1 and 0.5 hours) for the first sintering stage, to fixing aluminium in its solid state phase at temperatures (500°C), of the memory alloy based on copper. The powder metallurgy method has been used to manufacture 3 samples for this alloy with(83%Cu,13%Al,4 %Ni). To make sure of the generation phases for Marten site and Austenite, physical tests (Optical microscopy, XRD, and SEM) were carried out before and...
Topics: (Cu-Al-Ni) Smart Alloys, Powder Metallurgy, Porosity, XRD & SEM
The objective of this work is to study the influence of volume fraction, size of particulates, formation of precipitates at the matrix/particle interface, particle cracking, voids/porosity, and clustering of particulates on the strength and stiffness of7020/SiCp metal matrix composites. Tensile strength and stiffness, increase with an increase in the volume fraction of SiC particulates. The tensile strength and stiffness decrease with increase in size of the particulates, presence of porosity,...
Topics: 7020, Tensile Strength, SiC, Clustering, Particle Cracking, Porosity, Interface Bonding
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In investigation aims to analyse the effect of transverse surface roughness on the squeeze film performance between porous rectangular plates. The associated differential equation is stochastically averaged making use of stochastic averaging method of Christensen and Tonder for transverse surface roughness. The equation is solved with appropriate boundary conditions to obtain the pressure and consequently the load bearing. The graphical results suggest that the bearing suffers because of...
Topics: Load carrying capacity, Porosity, Pressure distribution, Reynolds equation, Surface roughness
Self-compacting concrete (SCC) is relatively a recent development in the construction world. SCC is defined basically by two properties: Deformability and segregation resistance. It flows under its own weight while remaining homogeneous in composition. This research is aimed at examining the feasibility of using Rice Husk Ash as supplementary cementations material. In this research, the main variables are the proportion of rice husk ash (0%, 10%, 15%, 20%) and cement content.All the results...
Topics: RHA, SCC, Split Tensile strength, Compressive strength, Porosity, Civil Engineering
The experiment was conducted to evaluate the effect of irrigation systems, planting methods and irrigation intervals on soil porosity and soil electrical conductivity and potato yields for fall season of 2016 in Yousufia Area. Three irrigation systems included Sprinkler Irrigation (S), Drip irrigation (D),and Furrow Irrigation (F), two different irrigation intervals included (4 day irrigation interval (I1) and 8 day irrigation interval (I2)) and two methods of planting included (Mechanical...
Topics: Sprinkler Irrigation, drip irrigation, soil porosity, mechanical planting, irrigation interval.
Self-compacting concrete (SCC) is relatively a recent development in the construction world. SCC is defined basically by two properties: Deformability and segregation resistance. It flows under its own weight while remaining homogeneous in composition. This research is aimed at examining the feasibility of using Rice Husk Ash as supplementary cementations material. In this research, the main variables are the proportion of rice husk ash (0%, 10%, 15%, 20%) and cement content.All the results...
Topics: RHA, SCC, Split Tensile strength, Compressive strength, Porosity, Civil Engineering
In the present research, effects of titanium addition as grain refiner combined with casting parameters on the porosity in the AlSi9 alloy was studied. Porosity was investigated via TATUR test. The casting parameters studied are: pouring temperature and initial mold temperature. The total porosity was experimentally quantified by densimetry method. A small decrease in porosity value was observed with increasing the pouring temperature from 700 to 800 °C. It has been found that the effect of...
Topics: Porosity, Aluminum-Silicon Alloy, TATUR Test, Grain Refinement & Casting Parameters
Power electronic packaging highly demands the innovative light-weight heat dissipation materials with a combination of the low coefficient of thermal expansion (CTE) and the high thermal conductivity. In this study, the high-performance carbon based aluminium thermal management composite has been successfully developed by infiltrating porous carbon matrix with Al at high-pressure conditions. It is found that Al can be effectively injected into the matrix tiny pores as small as 40 – 50 nm,...
Topics: C-Al Composite, Thermal Conductivity, Low CTE, Porosity, High-Pressure Impregnation
In this paper, finite element heat transfer analysis of a 3D orthogonal woven C-SiC composite is presented. Thermal transport properties of the composite are predicted in the three orthogonal directions. The effect of different manufacturing porosity types on thermal transport characteristics of the composite is also determined, which is achieved by using four unit cells constructed at different length scales. The predictive capability of the finite element models is benchmarked against the...
Topics: CMC, 3D C-SiC Composite, Finite Element Modelling, Thermal Characteristics, Porosity
In this paper, finite element heat transfer analysis of a 3D orthogonal woven C-SiC composite is presented. Thermal transport properties of the composite are predicted in the three orthogonal directions. The effect of different manufacturing porosity types on thermal transport characteristics of the composite is also determined, which is achieved by using four unit cells constructed at different length scales. The predictive capability of the finite element models is benchmarked...
Topics: CMC, 3D C-SiC Composite, Finite Element Modelling, Thermal Characteristics, Porosity
NDT has evolved as an essential demand in much modern engineering design in aircraft applications. The performance levels and reliability of the NDE is more important to the end use of the object being inspected. Failure is the primary threat to the integrity, safety and performance of aircraft structure. The aero grade material AA 2014 was taken for this project in the form of plate and welded by Tungsten Inert Gas welding TIG . The following NDT methods was done on this material Penetrant...
Topics: Mechanical Engineering, X-Ray Radiography, porosity, TIG-Welding and AA2014 plates
