This paper presents the results of a Forest Products Laboratory study regarding the effects of resin content, particle size, and molding pressure upon specific gravity, strength, and water absorption of hardboard products made of wood waste treated with powdered phenolic resin. Modulus of rupture in bending was found to vary approximately as the cube of specific gravity, whereas water absorptio...

Density is one of the most prevalent physical property used to classify and characterise fluids, not only in the environmental, cosmetics, pharmaceuticals, and food and beverage industries, but also in hydrocarbon processing industry (HPI). Petroleum products are everywhere in today’s life, and have become almost natural parts of the modern world. Numerous products used on a daily basis are der...

In the experimental tests of gravity, there have been considerable interests in the possibility of intermediate-range gravity. In this paper, we use the earth-satellite measurement of earth gravity, the lunar orbiter measurement of lunar gravity, and lunar laser ranging measurement to constrain the intermediate-range gravity from λ = 1.2×10m−3.8×10m. The limits for this range are α = 10−5×10, w...

Abstract—Gravity field is of great significance in geoscience, national economy and national security, and gravitational gradient measurement has been extensively studied due to its higher accuracy than gravity measurement. Gravity gradient sensor, being one of core devices of the gravity gradient instrument, plays a key role in measuring accuracy. Therefore, this paper starts from analyzing th...

We present an approach to calculate scalar and tensor gravity utilizing the massively parallel architecture of consumer graphics cards. Our parametrization is based on rectilinear blocks with constant density within each blocks. This type of parametrization is well suited for inversion of gravity data or joint inversion with other datasets, but requires the calculation of a large number of mode...

Introduction Gravity gradiometry has come to be routinely integrated into exploration workflows, since it can provide an independent measure of the subsurface density distribution. 3D density models derived from gravity gradiometry data are used to improve velocity models used in seismic imaging of complex salt and basalt structures. The advantage of gravity gradiometry over other gravity metho...

Creatinine and specific gravity (relative density) measurements both allow differences in urine concentration to be taken into account in determining urine cotinine concentrations. In this study we demonstrate that the variance of urine cotinine measurements is reduced comparably when either creatinine or specific gravity measurements are used for correction. This reduction in variability impro...

We analyze the relationship between the speed of light ce and the speed of gravity cg in the bi-metric theory of gravity. We reveal that in this theory the speed of light is a function of the speed of gravity which is a primary fundamental constant. Thus, experimental measurement of ce in the framework of the bi-metric theory is merely a convoluted way to measure cg. PACS numbers: 04.20.Cv, 04....

one of the most remarkable basis of the gravity data inversion is the recognition of sharp boundaries between an ore body and its host rocks during the interpretation step. therefore, in this work, it is attempted to develop an inversion approach to determine a 3d density distribution that produces a given gravity anomaly. the subsurface model consists of a 3d rectangular prisms of known sizes ...

Contents 1. Introduction 2. Physical properties of peat 2.1. Decomposition degree of peat 2.2. Water retention property of peat 2.3. Specific gravity and bulk density of peat 3.