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Creator | Title | Description | Subject | Date |
| 126 |
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Miller, Jan D. | Particle size segregation on a belt conveyor | Particle size segregation is a common phenomenon in many particulate processes and has many undesirable effects. The size segregation which occurs on a belt conveyor causes a serious problem for on-line particle size measurement using image-based techniques. Whether particle size distributions mea... | Particles; Size; Belt conveyors; Modelling | 1997 |
| 127 |
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Miller, Jan D. | Magnetic separation for wastepaper recycle mills | An alternative approach to the conventional washing and flotation techniques for de-inking of mixed office waste (MOW) is magnetic separation. The use of magnetic de-inking has great potential to improve the efficiency of ink removal due to the magnetic content of toners. It is shown experimen... | Deinking; Paper pulp; Wastepaper; Magnetic separation | 1997 |
| 128 |
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Miller, Jan D. | Removal of volatile organic compounds from contaminated water using air-sparged hydrocyclone stripping technology | The air-sparged hydrocyclone (ASH) technology offers the unique opportunity to achieve efficient removal of volatile organic compounds (VOCs) from contaminated water at a high specific capacity, more than 100 times that of conventional air stripping technologies. VOC stripping is the first applicati... | Air-sparged hydrocyclone; Air stripping; Contaminated water | 1997 |
| 129 |
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Miller, Jan D. | Effect of ink types and printing processes on flotation deinking | Examination of ink types reveals that newsprint oil-based offset-cold and offset-heat inks contain substantial oil (45 to 60%) and resin (5 to 35%), water-based ink contains water (40%) and resin (polystyrene, 30%). These inks are liquids with densities around 1 g/cm3, having various viscosities... | Toners; Inks; Photocopying; Laser printing; Flotation; Deinking; Recycling; Office waste; Hyrdophobicity | 1997 |
| 130 |
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Miller, Jan D. | Direct three-dimensional liberation analysis by cone beam x-ray microtomography | Liberation of valuable minerals during size reduction is an important aspect of mineral processing technology. In practice, most quantitative information on liberation is based on the application of stereological theorems for the analysis of image data from two-dimensional polished sections. On th... | Mineral processing; Cone beam x-ray; Microtomography | 1997 |
| 131 |
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Miller, Jan D. | Surface chemistry of pulping and flotation for mixed office wastepaper | The effect of pulping reagents on the de-inking flotation of laser printed wastepaper was investigated with regard to the removal efficiency of toner and mineral filler particles at different pH values. These results show that caustic pulping causes the toner to be released from the fibers as larg... | Pulping reagents; Deinking; Toner; Mineral fillers | 1997 |
| 132 |
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Fernandez, Diego P. | Formulation for the static permittivity of water and steam at temperatures from 238 K to 873 K at pressures up to 1200 MPa, including derivatives and Debye- Hückel coefficients | A new formulation is presented of the static relative permittivity or dielectric constant of water and steam, including supercooled and supercritical states. The range is from 238 K to 873 K, at pressures up to 1200 MPa. The formulation is based on the ITS-90 temperature scale. It correlates a selec... | Static relative permittivity; Dielectric constant | 1997 |
| 133 |
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Zhdanov, Michael | Quasi-linear series in three-dimensional electromagnetic modeling | We have recently introduced a quasi-linear (QL) approximation for the solution of the three-dimension(a3l -D) electromagnetic modeling problem. In this paper we discuss an approach to improving its accuracy by considering the QL approximation so f the higher order. This approach can be considered th... | | 1997-01-01 |
| 134 |
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Chapman, David S. | Global warming - just hot air? | We know from weather station records that Earth's surface temperature has increased on average by 0.6 degrees C in the last 100 years. The 1990s have been the warmest decade on record. Over the same period, global sea level has increased by 10-20 cm. We know also that planet Earth has an atmosphere ... | Greenhouse Effect; Climate change | 1998 |
| 135 |
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Chapman, David S.; Allis, Richard George | Late Neogene exhumation patterns in Taranaki Basin (New Zealand): evidence from offset porosity-depth trends | Taranaki Basin, New Zealand, is located adjacent to the Australian-Pacific Plate boundary where the tectonic regime changes from dominantly subduction-related to the north to transpression-related along the Alpine Fault to the south. During the Neogene, burial and exhumation varied extensively, in ... | Neogene; Uplift; Exhumation; Taranaki Basin; New Zealand | 1998 |
| 136 |
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Miller, Jan D. | Further considerations of magnetic deinking for wastepaper recycling mills | Magnetic de-inking has been shown to be an efficient process for the removal of certain toner particles from mixed office waste (MOW) furnishes. It is possible to achieve a dirt removal of 96% with the WHIMS (wet high intensity magnetic separator) if all toner particles present in the furnish are at... | Magnetic deinking; Paper pulp; Wastepaper; Mixed office waste; (MOW) | 1998 |
| 137 |
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Chapman, David S. | Geothermics and climate change: 2. Joint analysis of borehole temperature and meteorological data | Long-period ground surface temperature variations contained in bore hole temperature-depth profiles form a complementary climate change record to high-frequency, but noisy surface air temperature (SAT) records at weather stations. We illustrate the benefits of jointly analyzing geothermal and meteo... | Surface air temperature; Ground surface temperature; Borehole temperatures; Geothermal observations; Heat transfer | 1998 |
| 138 |
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Chapman, David S. | Geothermics and climate change: 1. Analysis of borehole temperatures with emphasis on resolving power | Temperature-depth data from six boreholes in western Utah and nine boreholes in southeastern Utah are reanalyzed for evidence of ground surface temperature (GST) histories. We invert the temperature-depth data using the functional space inverse algorithm of Shen and Beck [1991, 1992] which we prefer... | Surface air temperature; Ground surface temperature; Borehole temperatures; Geothermal observations; Geothermics | 1998 |
| 139 |
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Jewell, Paul | Geochemical variations in an alpine lake and watershed underlain by siliciclastic bedrock, Uinta Mountains, Utah | A small watershed which includes several small lakes in the Uinta Mountains of northern Utah is underlain by monolithologic Precambrian siliciclastic rock with extremely limited buffering capacity. In spite of this, s\ stematic spatial and temporal variations in alkalinity, pH, and major elements oc... | | 1998-01-01 |
| 140 |
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Miller, Jan D. | Treatment of cyanide by using the Mexican modification of the Merrill-Crowe process | Cyanide consumption can be a major factor which contributes to operating cost for cyanidation. Also after extraction and recovery of precious metals substancial amounts of cyanide are delivered to tailings ponds which creates environmental problems due to the toxicity of cyanides. In this regard, th... | Cyanidation; Merrill-Crowe process; Air-sparged hydrocyclone; Cyanide recovery; Cyanide destruction; Chlorine dioxide | 1999 |
| 141 |
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Miller, Jan D. | Effect of pH on pulping and flotation of mixed office wastepaper | The effect of pulping reagents on the deinking flotation of laser-printed wastepaper was investigated with regard to the removal efficiency of toner and mineral filler particles at different pH values. These results show that caustic pulping causes the toner to be released from the fibres as larger... | Wastepaper; Deinking; pH values; Pulp production processes | 1999 |
| 142 |
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Miller, Jan D. | Internal reflection spectroscopy for FTIR analysis of carboxylate adsorption by semi-soluble salt minerals | Flotation chemists have long sought to unravel the mechanisms of carboxylate collector adsorption by semi-soluble salt minerals. In particular, the adsorption density of adsorbed carboxylates, adsorption kinetics, speciation (chemisorbed, physisorbed), orientation, and conformation are of interest.... | Carboxylate collector adsorption; Salt minerals; Internal reflection spectroscopy | 1999 |
| 143 |
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Chandran, Ravi | Evolution of microstructure and phases in in-situ processed Ti-TiB composites containing high volume fractions of TiB whiskers | A series of titanium composites, with varying volume fractions of titanium monoboride (TiB) whiskers, were made by mixing various proportions of titanium (Ti) and titanium diboride (TiB2) powders followed by hot pressing. The phases present were identified by x-ray diffraction. | Morphology; diffraction; relative intensity | 1999 |
| 144 |
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Brown, Francis Harold | The evolution of neogene terrestrial ecosystems in Europe | The Pliocene-Pleistocene chronology of hominid and other vertebrate evolution in East Africa is largely constrained by isotopic dating and regional intercorrelation of volcanic ash layers. Some eruptions were of sufficient magnitude or duration that their widespread tephra dispersal defines a serie... | | 1999 |
| 145 |
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Miller, Jan D. | Free and emulsified oil removal by bubble accelerated flotation (BAF) | Operational data from full-scale field applications and pilot tests using the Bubble Accelerated Flotation ( B A R system for the treatment of wastewater are presented. The compact BAF system based on the air-sparged hydrocyclone technology was designed to remove pollutants from industrial waste and... | Bubble accelerated flotation; Air-sparged hydrocyclone; Flocculants; Oil-in-water emulsion | 1999 |
| 146 |
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Zhdanov, Michael S. | Focusing geophysical inversion images | A critical problem in inversion of geophysical data is developing a stable inverse problem solution that can simultaneously resolve complicated geological structures. The traditional way to obtain a stable solution is based on maximum smoothness criteria. This approach, however, provides smoothe... | Focusing; Geophysical inversion images; Minimum gradient support functionals; MGS | 1999 |
| 147 |
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Chapman, David S. | Regional heat-flow variations across the sedimented Juan de Fuca Ridge eastern flank: constraints on lithospheric cooling and lateral hydrothermal heat transport | Seafloor heat flow has been estimated continuously along a transect on the sedimented eastern flank of the Juan de Fuca Ridge to provide constraints on the scale and rate of lateral heat and fluid transport in the upper igneous crust, and on the total flux from the young lithosphere beneath. The ... | Juan de Fuca Ridge; Seafloor; Lithospheric cooling; Hydrothermal heat transport | 1999 |
| 148 |
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Zhdanov, Michael S. | Three-dimensional quasi-linear electromagnetic modeling and inversion | The quasi-linear (QL) approximation replaces the (unknown) total field in the integral equation of electromagnetic (EM) scattering with a linear transformation of the primary field. This transformation involves the product of the primary field with a reflectivity tensor, which is assumed to vary slo... | | 1999-01-01 |
| 149 |
 |
Zhdanov, Michael S. | Parameter estimation for 3-D geoelectromagnetic inverse problems | Parameter estimation in geoelectromagnetics aims to obtain the most important parameters of a well-defined conductivity model of the Earth. These parameters are features of typical geological structures, such as depth and size of conductive or resistive targets, angle of dike inclination and its le... | | 1999-01-01 |
| 150 |
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Miller, Jan D. | Evaluation of plantwide control strategies for coal preparation plants | The quality of cleaned products from coal preparation plants is often variable due to natural fluctuations in the washability characteristics of the plant feed. To combat this problem, many modern plants have installed on-line analyzers that provide feedback for the real-time control of product q... | Circuit; Yield; Optimization | 2000 |
