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Hafez

Alaaeldin M. Hafez, Riyadh SA

Patent application numberDescriptionPublished
20110296193CODE-BASED HASHING FOR MESSAGE AUTHENTICATION CODES - Code-based hashing for message authentication code generation is described. In one aspect, a computer-implemented method receives a message and a secret key. A hash function is built based on respective portions of the secret key and a language interpreter. A formatted message is hashed using the hash function to generate a message authentication code for authentication of the message.12-01-2011

Amr N. Hafez, Cairo EG

Patent application numberDescriptionPublished
20110222067TECHNIQUE TO DETERMINE MIRROR POSITION IN OPTICAL INTERFEROMETERS - A Micro Electro-Mechanical System (MEMS) interferometer system utilizes a capacitive sensing circuit to determine the position of a moveable minor. An electrostatic MEMS actuator is coupled to the moveable minor to cause a displacement thereof. The capacitive sensing circuit senses the current capacitance of the MEMS actuator and determines the position of the moveable minor based on the current capacitance of the MEMS actuator.09-15-2011

Hisham Mohamed Hafez, London CA

Patent application numberDescriptionPublished
20120009643INTEGRATED SYSTEM FOR HYDROGEN AND METHANE PRODUCTION FROM INDUSTIAL ORGANIC WASTES AND BIOMASS - The present invention provides a system that has been devised to overcome the two most important limitations for sustained biological hydrogen production, namely contamination of the microbial hydrogen-producing cultures with methane-producing cultures necessitating frequent re-start-up and/or other methanogenic bacteria inactivation techniques, and the low bacterial yield of hydrogen-producers culminating in microbial washout from the system and failure. The system includes a continuously stirred bioreactor (CSTR) for biological hydrogen production, followed by a gravity settler positioned downstream of the CSTR, which combination forms a biohydrogenator. The biomass concentration in the hydrogen reactor is kept at the desired range through biomass recirculation from the bottom of the gravity settler and/or biomass wastage from the gravity settler's underflow. The gravity setter effluent is loaded with volatile fatty acids, as a result of microbiological breakdown of the influent waste constituents by hydrogen-producing bacteria, and is an excellent substrate for methane-forming bacteria in the downstream biomethanator.01-12-2012

Moustapha Hafez, Paris FR

Patent application numberDescriptionPublished
20080231478Solid Oxide Fuel Cell With Sealed Structure - This tactile interface includes a layer (09-25-2008
20080246737Method and Devices of Transmitting Tactile Information Description - Method of transmitting tactile information to a tactile display with a touch plate containing pads, the touch plate being controlled by a server, in which, 10-09-2008
20080307786Multi-Stable Actuator Based on Shape Memory Alloy and Touch-Sensitive Interface Using Same - The multistable actuator (12-18-2008
20100031803TACTILE OR HAPTIC DEVICE, AND A MUSICAL KEYBOARD WITH AT LEAST ONE SUCH SIMULATION DEVICE - A tactile or haptic sensation simulation device designed to oppose the movement of a manual control component with a reaction reflecting the movement of the control, where the said device has a chamber containing a magneto-rheological fluid, a mobile element interacting mechanically with the fluid and intended to be linked mechanically to the control component, where the said element is mobile between two predetermined positions, at least one sensor with a cinematic and/or dynamic range that is representative of the movement of the control component, a control component and means for the generation of a suitable magnetic field around the chamber so as to apply a magnetic field that is dependent on the dynamic characteristics to be simulated for the movement of the manual control component, and the real-time measurements, the whole being such that the apparent viscosity of the magneto-rheological fluid varies over the travel of the manual control component.02-11-2010

Patent applications by Moustapha Hafez, Paris FR

Moustapha Hafez, Arcueil FR

Patent application numberDescriptionPublished
20100283724DAMPING DEVICE CAPABLE OF PROVIDING INCREASED STIFFNESS - Damping device to impose a reaction to the displacement of a manual operating device (11-11-2010
20110128135HAPTIC INTERFACE WITH INCREASED BRAKING FORCE - A haptic interface including an element that interacts with a user; a rotation shaft with a longitudinal axis to which the user interaction element is fixed in rotation; a fluid interaction element, the fluid interaction element being fixed in rotation to the shaft, the fluid being of magneto-rheological type, a system generating magnetic field in the fluid; and a control unit capable of generating orders to magnetic field generation system so as to modify the magnetic field. The interaction element includes a cylindrical wall of revolution with a longitudinal axis, including through openings and/or patterns in relief.06-02-2011
20110181405FORCE FEEDBACK INTERFACE WITH IMPROVED SENSATION - An haptic interface including a knob manipulated by a user, a rotation shaft with a longitudinal axis to which the knob is fixed in rotation, an interaction element with a magneto-rheological fluid in rotation with the shaft, the fluid, a system for generating a magnetic field in the fluid, and a control unit capable of generating orders to the system for generating the magnetic field to modify the magnetic field. The system includes a coil type mechanism generating a variable magnetic field, and a permanent magnet type mechanism generating a permanent magnetic field.07-28-2011
20110228252DEVICE AND METHOD FOR MEASURING THE POSITION OF AT LEAST ONE MOVING OBJECT IN A THREE-DIMENSIONAL GRID - A device for measuring the position of at least one moving object in a three-dimensional grid. The device comprises: at least one optical head comprising an independent laser sources array outputting collimated laser beams, arranged about a central photodetector with a single sensitive cell; at least one movable base with two rotational degrees of freedom whereto said array is secured; and control electronics.09-22-2011

Tareq Hafez, Marsfield AU

Patent application numberDescriptionPublished
20090132690On-Demand Download Network - A device retrieves only the application software that is missing on the device and is currently required to perform a certain function. An object-request module sends a request that identifies only the needed application.05-21-2009

Walid M. Hafez, Portland, OR US

Patent application numberDescriptionPublished
20090242998PENETRATING IMPLANT FOR FORMING A SEMICONDUCTOR DEVICE - A semiconductor device and method to form a semiconductor device is described. The semiconductor includes a gate stack disposed on a substrate. Tip regions are disposed in the substrate on either side of the gate stack. Halo regions are disposed in the substrate adjacent the tip regions. A threshold voltage implant region is disposed in the substrate directly below the gate stack. The concentration of dopant impurity atoms of a particular conductivity type is approximately the same in both the threshold voltage implant region as in the halo regions. The method includes a dopant impurity implant technique having sufficient strength to penetrate a gate stack.10-01-2009
20100163952Flash Cell with Integrated High-K Dielectric and Metal-Based Control Gate - A semiconductor device is described having an integrated high-k dielectric layer and metal control gate. A method of fabricating the same is described. Embodiments of the semiconductor device include a high-k dielectric layer disposed on a floating gate. The high-k dielectric layer defines a recess. A metal control gate is formed in the recess.07-01-2010
20100164603Programmable fuse and anti-fuse elements and methods of changing conduction states of same - A programmable anti-fuse element includes a substrate (07-01-2010
20110147837DUAL WORK FUNCTION GATE STRUCTURES - A semiconductor chip having a transistor is described. The transistor having a gate electrode disposed over a gate dielectric. The gate electrode comprised of first gate material disposed on the gate dielectric and second gate material disposed on the gate dielectric. The first gate material being different than the second gate material. The second gate material also located at a source region or drain region of said gate electrode.06-23-2011
20110215422PENETRATING IMPLANT FOR FORMING A SEMICONDUCTOR DEVICE - A semiconductor device and method to form a semiconductor device is described. The semiconductor includes a gate stack disposed on a substrate. Tip regions are disposed in the substrate on either side of the gate stack. Halo regions are disposed in the substrate adjacent the tip regions. A threshold voltage implant region is disposed in the substrate directly below the gate stack. The concentration of dopant impurity atoms of a particular conductivity type is approximately the same in both the threshold voltage implant region as in the halo regions. The method includes a dopant impurity implant technique having sufficient strength to penetrate a gate stack.09-08-2011

Patent applications by Walid M. Hafez, Portland, OR US

Zachary Hafez, Columbia, MO US

Patent application numberDescriptionPublished
20110313392STEERABLE EPIDURAL CATHETER - A steerable catheter device which can be steered to locations within the epidural space, as well as methods of use and manufacture are disclosed. The steerable catheter provides a site-specific drug delivery system for accessing the epidural space. The catheter devices includes a steerable wire or a liner extending from a proximal end of the catheter to the catheter's distal end. Forces applied to the wire or the liner cause the distal end to deflect and/or rotate to reach a targeted epidural site.12-22-2011