127results about How to "Constant time" patented technology

A computer filing system includes a data access and allocation mechanism including a directory and a plurality of indexed data files or hash tables. The directory is preferably a radix tree including directory entries which contain pointers to respective ones of the hash tables. Using a plurality of hash tables avoids the whole database ever having to be re-hashed all at once. If a hash table exceeds a preset maximum size as data is added, it is replaced by two hash tables and the directory is updated to include two separate directory entries each containing a pointer to one of the new hash tables. The directory is locally extensible such that new levels are added to the directory only where necessary to distinguish between the hash tables. Local extensibility prevents unnecessary expansion of the size of the directory while also allowing the size of the hash tables to be controlled. This allows optimisation of the data access mechanism such that an optimal combination of directory-look-up and hashing processes is used. Additionally, if the number of keys mapped to an indexed data file is less than a threshold number (corresponding to the number of entries which can be held in a reasonable index), the index for the data file is built with a one-to-one relationship between keys and index entries such that each index entry identifies a data block holding data for only one key. This avoids the overhead of the collision detection of hashing when it ceases to be useful.

A method and system for brewing a desired volume of coffee at a selected brew time, in which a volume of water corresponding to the desired volume of coffee is heated and directed into contact with coffee grounds in a brewing chamber. Contact between at least a portion of the heated water and the coffee grounds is maintained for approximately the selected brew time to form brewed coffee. The brewing time, however, is substantially independent of the desired volume of coffee to be brewed and is controlled by control of the rate at which heated liquid flows into or out of the brewing chamber. At the expiration of the brewing time, brewed coffee is released through an opening in the brewing chamber and into an underlying receptacle.

The present invention provides a photodiode comprising a p-i-n or pn junction at least partly formed by first and second regions (2) made of semiconductor materials having opposite conductivity type, wherein the p-i-n or pn junction comprises a light absorption region (11) for generation of charge carriers from absorbed light. One section of the p-i-n or pn junction is comprises by one or more nanowires (7) that are spaced apart and arranged to collect charge carriers generated in the light absorption region (11). At least one low doped region (10) made of a low doped or intrinsic semiconductor material provided between the nanowires (7) and one of said first region (1) and said second region (2) enables custom made light absorption region and/or avalanche multiplication region of the active region (9).

There is provided an imaging device including, an operating portion on which are input a recording start instruction and a recording stop instruction, a recording portion that records onto a recording medium moving images that are picked up during a recording period from the recording start instruction to the recording stop instruction, a thumbnail generation portion that generates a plurality of thumbnail images that represent each of sections obtained by time division of the moving images, and a display control portion that displays a recorded image verification screen on a display portion immediately after the recording stop instruction, the plurality of thumbnail images being arranged in chronological order on the recorded image verification screen.

A motion picture camera arrangement comprises a motion picture camera and a display device, wherein the motion picture camera has an image sensor for taking images at a variable frame rate and wherein the display device displays the taken images at a settable display rate. A method of operating the motion picture camera arrangement comprises the steps of: selecting a frame rate; determining a setting value for the display rate of the display device, wherein the setting value corresponds, in dependence on the selected frame rate, either to the selected frame rate or to a product or quotient of the selected frame rate and a whole-number multiplier or divisor; operating the image sensor at the selected frame rate; and operating the display device using the determined setting value for the display rate.

The present invention is directed to a seed discharge system is that employs a pair of rotating belts spaced from one another to receive the seeds from a seed metering device and to direct the seeds into the desired location within a trench over which the discharge system is positioned. The seeds are received within a gap formed between the belts and are clamped and held between the belts as the belts move, consequently moving the seeds from the seed metering device to the discharge opening of the discharge system. The constant engagement of the seeds with the belts through the discharge system prevents the seeds from bouncing, thereby maintaining a constant residence time for the seeds within the discharge system.

The modem of a portable computer device draws a portion of its required power from the telephone line using a low noise switching power supply. The switching power supply can alternatively or additionally assist in keeping the battery of the portable computer device charged. The generation or propagation of electrical noise on the input telephone line is minimized by actively maintaining a constant input impedance from the telephone line to the modem. In one embodiment, a switchable shunt impedance is placed in parallel with the input to a PWM switching power supply and actively controlled to maintain the impedance of the input of the PWM switching power supply constant to the extent that a constant current draw is maintained. Thus, the net input impedance of the modem as sensed by the telephone line is stable and balanced despite the chopping of the current on the telephone line due to the switching of the PWM switching power supply, thus minimizing or eliminating the generation of electrical noise back to the telephone line. In another embodiment, a constant current regulator is placed in series with a PWM switching power supply to maintain a constant input impedance to the modem as sensed by the telephone line.

The invention discloses a fast data package filtering method, including the processing courses: preprocessing all the filtering rules and generating the index tables at all stages; according to a determined recurrence table-look-up route, making operations of inquiry and aggregation on the index tables at all stages to obtain the final data processing mode information, completing classifying data packages. It can meet the filter processing requirement of line speed packages on high-speed routers. When the number of filtering rules increases, it is obviously prior to a linear table-look-up mode, the larger the number is, the more obvious the advantage is; the filter matching time is constant when transmitting packages, and the delay time is short without stability and reliability of the network. It can be applied to firewall, network access server, four-layer exchanger, and other applications in need of fast filtering packages.

The present invention relates to a method for insulating an aircraft cabin 6 and for the cooling or heating of cabin air in an aircraft, respectively with the method comprising the steps of: introducing aircraft cabin air into an aircraft cabin wall 6; guiding this aircraft cabin air along a section of this aircraft cabin wall 6; and leading this aircraft cabin air away from the aircraft cabin wall 6.

A locating system of oxidation/reduction potential of the electrolysis water and the constant output method of calibration and compensation thereof are disclosed. Thus, the voltage of the electrolytic bath can be regulated so as to control an electrolytic current of the electrolytic bath exactly, so that the electrolytic current of the electrolytic bath is maintained at a constant value.

A method and apparatus are disclosed for performing software guided prostate biopsy to extract cancerous tissue. The method significantly improves on the current system by accelerating all computations using a graphical processing unit (GPU) keeping the accuracy of biopsy target locations within tolerance. The result is the computation of target locations to guide biopsy using statistical priors of cancers from a large population, as well as based on previous biopsy locations for the same patient, and finally via mapping protocols with predefined needle configurations onto the patient's current ultrasound image.

A system and method for rotating multiple plants through light on a continual basis and feeding plants while they are rotated. This system is able to provide the plants with food and water at levels inputted into its control panel. The water which runs through the system can be re-circulated and used by the plants. The system aerates the water in the re-circulation chamber before it is put back onto the plants. This system also has the capabilities to test the pH and nutrient level of the growing media which can include but is not limited to one or more of the following: spun rock, clay pellets, soil, or any other hydroponic growing media.

An apparatus for and a method of operating an array of pixels of an image sensor, where each pixel includes at least a photosensor, an associated storage device and a floating diffusion region and the array of pixels is configured in a plurality of rows and columns. The photosensors associated with the pixels are reset and charges are accumulated in the photosensor. The accumulated charges are then globally transferred to storage devices associated with the pixels. A rolling double reset is used to reduce the deleterious effects on the accumulated charges stored in the storage devices. The accumulated charges stored in the storage devices are transferred to floating diffusion regions associated with the pixels and the charges residing in the floating diffusion region are read out. In a second embodiment the storage device is eliminated and the rolling double reset is used to reduce the deleterious effects on the accumulated charges stored in the floating diffusion region.

The invention provides an image reading apparatus that produces a precise image of an original document to prevent the read image from having distortion or irregular density, by driving a DC motor, which drives an image reading unit in a scanning direction, at a constant speed suitable for a document to be read. In addition, the image reading apparatus prevents position errors or misalignment at the start of the image reading, or at a restart of the image reading after the image reading is paused. A speed control circuit provides feedback to a DC motor to synchronize a time interval detected by a pulse interval detecting circuit with a time interval set by an interval setting register, so that the DC motor is operated at a constant speed. A counter counts the number of signals output from an encoder. After the speed of the DC motor is stabilized, a timing of signals output from a CCD drive unit to the image reading unit is synchronized with a timing of the signals generated by the encoder. As a count in the counter reaches a predetermined number, an actual image reading is started. Thus, the position errors or misalignment are prevented in the produced image.

An object of the present invention is to provide a liquid crystal display device which is capable of preventing single-image prolonged-display screen burn while keeping an image constantly on display.

The liquid crystal display device includes a liquid crystal panel provided with groups of pixel formation portions disposed in a matrix pattern, and a backlight which is capable of turning ON/OFF of lighting for each region which includes a predetermined number of scanning lines. Each frame period for an entered video signal is divided into a first sub-frame period and a second sub-frame period. In the first sub-frame period, the liquid crystal panel is supplied with a data signal based on the entered video signal as the scanning lines are selected. In the second sub-frame period a data signal based on a refresh data for prevention of screen burn is supplied. Each region as a unit of backlight ON/OFF state control is supplied with lighting when pixel formation portion group on the scanning lines served by the region are supplied with data signal based on the entered video signal while lighting is not supplied when data signal based on the refresh data is supplied.

The present invention provides an image printing apparatus which comprises registration roller unit which convey an image recording sheet toward an image transfer position at which the toner image is transferred onto the image recording sheet, a sensor which is provided between the registration roller unit and the image transfer position to detect the image recording sheet, and a control unit which controls driving of the registration roller unit. In order to make the time required for each image recording sheet to reach the image transfer position constant, the image printing apparatus is adapted to start the driving of the registration roller unit at the first sheet convey speed higher than the linear speed of the surface of the image carrier, measure the time required until the leading end of a conveyed image recording sheet is detected by the sensor after a driving signal for the registration roller unit is output, and reduce the sheet convey speed of the registration roller unit to the second sheet convey speed at the timing based on the measurement result.

The use of lipopeptides as inducers of NF-κB for the protection of mammals from the effects of apoptosis is described.

Terminals #1 to #3 which have already been connected and a terminal #4 which wants to make a new connection send packets to a base station in that order. The base station queues the packets from the terminals #1 to #3 at a non-priority queue and the packet from the terminal #4 at a priority queue. For example, a predetermined amount of packets from a new connection is queued at the priority queue. Packets in the priority queue are dequeued with priority. Therefore, the packet sent from the terminal #4 is first sent to a base-station controller, and then the packets sent from the terminals #1 to #3 are sent to the base-station controller. As a result, the base-station controller first receives the packet sent from the terminal #4, and the period of time required for the terminal #4 to establish a connection is reduced.