Minnaar
Hugo R. Minnaar, Kempton Park ZA
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20100120619 | Agricultural Composition With PH Colour Indicators - The present invention provides a concentrate for dilution with water in the preparation of an agricultural composition for application to crops, soil or animals. The concentrate is recommended for use with agricultural chemicals whose agricultural activity varies with the pH of the water. It comprises an active ingredient and a combination of pH indicators for colouring the water, the pH indicators being selected so as to indicate different colours of spray water at different pH levels. The proportions of active ingredient and pH indicators are selected so that when the concentrate is added to water, the pH indicators indicate visually upper and lower pH limits for optimum activity of the agricultural chemical. | 05-13-2010 |
Karel Minnaar, Houston, TX US
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20100005864 | Method To Measure Tearing Resistance - At least one method, structure and apparatus used to measure tearing resistance of a commercial member. The method includes the use of full-scale testing methods and apparatuses to obtain unloading compliance measurements, which are used to generate a tearing resistance curve that includes the effects of geometry and considers data beyond the yield point of the commercial member. The commercial member may be a pipeline for carrying hydrocarbons. | 01-14-2010 |
20100006545 | Welding of Pipeline to Enhance Strain Performance - A method and apparatus utilized in forming weld joint is described. In the method, a strength weld between two members is formed by a first welding process and a first weld metal. Then, one or more strain welds are formed by depositing a second weld metal adjacent to the strength weld using a second welding process. The strain welds are configured to form a weld joint having a specific minimum height and width to handle tensile strain to a specific strain capacity. | 01-14-2010 |
20100042379 | Framework to Determine the Capacity of A Structure - A framework for determining or predicting the capacity of a structure. The framework includes predicting the capacity of the structure utilizing a physics-based prediction model. The prediction model may be constructed from a variety of numerical analysis approaches. The prediction model further incorporates at least one material physics process, at least one geometry description, and at least one limit state. The limit states may include collapse, tensile fracture, and buckling. The framework calls for validation of the predicted capacity of the structure via experimental verification or other methods. In some embodiments, the structure is a pipeline for producing hydrocarbons and the modes of operation may include parametric studies, Monte-Carlo type distributions, or stand-alone values. | 02-18-2010 |
Mark Minnaar, Pretoria ZA
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20090309274 | ORBITAL IMPLANT - An orbital implant includes a body of bioactive material having macropores of at least 400 μm, and a cap of bioactive material having substantially no pores or only micropores smaller than 50 μm. The cap covers a portion of the body. | 12-17-2009 |
Pauli Minnaar, Smorum DK
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20150110310 | METHOD FOR REPRODUCING AN ACOUSTICAL SOUND FIELD - The application relates to a method of reproducing an acoustical sound field to a listener at a first location, to a method of testing a hearing assistance system, and to a hearing assistance test system. The method comprises 1) Determining a transfer function from each loudspeaker unit of the loudspeaker array to all microphone units of the microphone array, thereby providing a set of transfer functions; 2) Inverting the set of transfer functions and determining a system of optimal filters; 3) Placing the microphone array in a possible, intended position of the listener's head in a particular sound scene at a second location and recording sound of the particular sound scene at the second location; 4) Determining the loudspeaker signals of the particular sound scene configured to be played to the listener at the first location by the loudspeaker array by convolving the inverted system of optimal filters with the recorded signals. | 04-23-2015 |
Pauli Minnaar, Aalborg DK
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20080212788 | Recording, Synthesis And Reproduction Of Sound Fields In An Enclosure - The invention relates to simulation of sound fields in enclosures, for instance for application in listening tests, where test subjects assess the sound quality or other sound perception characteristics of the sound field. According to a specific embodiment, the system comprises a binaural synthesis portion which synthesises sound for instance from a sound-reproduction equipment based on measured impulse responses of an actual room stored in a data base ( | 09-04-2008 |
Pauli Minnaar, Smørum DK
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20150063612 | HEARING AID DEVICE WITH IN-THE-EAR-CANAL MICROPHONE - A hearing aid device is disclosed. The hearing aid device comprises a receiver configured to be arranged in the ear canal. The hearing aid device comprises a directional microphone system comprising two microphones or one microphone having two sound inlets. The hearing aid device comprises means for counteracting acoustic feedback on the basis of sound signals detected by the two microphones or the two sound inlets. The hearing aid device comprises an “open fitting” providing ventilation. The two microphones or the two sound inlets of the directional microphone (forming part of a directional system) are arranged in the ear canal at the same side of the receiver and sound is allowed to propagate freely between the microphones or between the inlets of the directional microphone and the receiver. Preferably, the hearing aid device comprises a procedure (such as an adaptive procedure) for optimising the directional system of the hearing aid device. An improved feedback reduction is thereby achieved, while allowing a relatively large gain to be applied to the incoming signal. | 03-05-2015 |
Paulus Jacobus Minnaar, Copenhagen DK
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20100215192 | METHOD AND DEVICE FOR EXTENSION OF LOW FREQUENCY OUTPUT FROM A LOUDSPEAKER - A method and device for enhancing low frequency content of an input signal (X), e.g. bass boosting of an audio signal. An overdriving (ODR) of a low frequency signal part (LS | 08-26-2010 |
Sanet Helena Minnaar, Randburg ZA
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20100120123 | Accelerated Heat Generation in Heap Bioleaching By Controlled Carbon Dioxide Addition - A microbial leaching process is carried out on a heap of particulate chalcopyrite ore by adding carbon dioxide to an air stream directed into the heap at least when the heap is at mesophilic temperatures, to stimulate growth, and to achieve a sufficiently high concentration, of mesophilic microbial strains in the heap so as to generate heat, at moderate thermophilic temperatures, at a rate which exceeds the rate of heat loss from the heap. | 05-13-2010 |
Susanna Helena Minnaar, Johannesburg ZA
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20110023662 | High Temperature Leaching Process - A method of conducting a bioleaching process including the steps of forming a main heap, culturing at least one microorganism which exhibits bioleaching activity in a predetermined temperature range, monitoring the temperature in the main heap, which is a result, at least, of microbial leaching activity and inoculating the heap with the cultured microorganism at least before the temperature reaches the predetermined range. | 02-03-2011 |