220 results about "Critical system" patented technology

The present application is directed to a host-based IDS on an HP-UX intrusion detection system that enhances local host-level security within the network. It should be understood that the present invention is also usable on, for example, Eglinux, solaris, aix windows 2000 operating systems. It does this by automatically monitoring each configured host system within the network for possible signs of unwanted and potentially damaging intrusions. If successful, such intrusions could lead to the loss of availability of key systems or could compromise system integrity.

The invention provides a method and system for caching information objects transmitted using a computer network. A cache engine determines directly when and where to store those objects in a memory (such as RAM) and mass storage (such as one or more disk drives), so as to optimally write those objects to mass storage and later read them from mass storage, without having to maintain them persistently. The cache engine actively allocates those objects to memory or to disk, determines where on disk to store those objects, retrieves those objects in response to their network identifiers (such as their URLs), and determines which objects to remove from the cache so as to maintain sufficient operating space. The cache engine collects information to be written to disk in write episodes, so as to maximize efficiency when writing information to disk and so as to maximize efficiency when later reading that information from disk. The cache engine performs write episodes so as to atomically commit changes to disk during each write episode, so the cache engine does not fail in response to loss of power or storage, or other intermediate failure of portions of the cache. The cache engine also stores key system objects on each one of a plurality of disks, so as to maintain the cache holographic in the sense that loss of any subset of the disks merely decreases the amount of available cache. The cache engine also collects information to be deleted from disk in delete episodes, so as to maximize efficiency when deleting information from disk and so as to maximize efficiency when later writing to those areas having former deleted information. The cache engine responds to the addition or deletion of disks as the expansion or contraction of the amount of available cache.

Techniques are described for identifying a root cause of a pattern of performance data in a system including a plurality of services. Embodiments provide dependency information for each of the plurality of services, where at least one of the plurality of services is dependent upon a first one of the plurality of services. Each of the plurality of services is monitored to collect performance data for the respective service. Embodiments further analyze the performance data to identify a cluster of services that each follow a pattern of performance data. The first one of the services in the cluster of services is determined to be a root cause of the pattern of performance data, based on the determined dependency information for each of the plurality of services.

The invention relates to an on-orbit autonomous management system for a satellite and an autonomous management method. Through a method of innovatively leading a bus data monitoring unit and performing state data issuing through unified scheduling for a sub-system on each satellite, state information is directly collected to the bus data monitoring unit, and data extraction by a satellite mission central computer is not required. The bus data monitoring unit directly combines related information for forming alarm information and transmits the alarm information to the satellite mission central computer, thereby saving time in time-sharing acquisition remote sensing and state information data extraction, buying expensive time for treating the fault in time, and improving a fault treating efficiency. A distributed data management method is used for optimizing the operation process of the satellite mission central computer and can simultaneously treat multiple fault alarms which simultaneously occur, thereby realizing intelligent operation for sequencing according to the damage degree and emergency degree of the fault, and maximally ensuring in-time recovery of key system states such as satellite energy and satellite gesture when multiple faults simultaneously occur.

Systems and methods which provide a new application security assessment framework that allows auditing and testing systems to automatically perform security and compliance audits, detect technical security vulnerabilities, and illustrate the associated security risks affecting business-critical applications.

There is provided a system and method for a modular central plant. In one implementation, the inventive system includes a chiller unit and cooling tower that are designed to be modularly assembled, transported, and interconnected, thereby decreasing system cost and assembly time, increasing system maintainability, and improving scalability for increasing capacity at a future date. The removable wall panels and roof of an embodiment of the present invention aid in maintainability by providing enhanced access to critical system components such as the chiller assembly. The modular architecture of the present invention allows for speedy delivery and installation, and with only external electrical and water connections needed, the system can become rapidly operational.

A control system for a subsurface safety valve addresses normal open and closed operation and a failsafe operation if key system components fail. It features a single control line from the surface that splits at the subsurface safety valve and goes to one end of two discrete piston chambers that are aligned and isolated from tubing pressure. The piston in one chamber is larger than in the other and the pistons are connected for tandem movement. Each side of the unbalanced system's piston has a seal mounted to it and another for the rod attached to it that exits the chamber. A jumper line connects the chambers at a point between the seals in each chamber and features a large reservoir. The jumper line is filled with a compressible fluid. Fail safe closure of the valve occurs if any of the four seals fail.

The present invention discloses a mm-wave radar sensor to be deployed in the vehicles for seat occupation detection applications. The key system relevant components are utilization of mm-wave integrated radar, specific planar high-gain antenna radiation pattern, and analyzing of the heartbeat and optionally also respiratory dynamics. The method of operation calculates probability of the seat occupation event regarding: detection of the passenger on the seat, detection of a baby or a child on the seat, detection of the presence of a baby or a child in the vehicle after the driver has left the vehicle, detection of the human or animal presence of intrusion in specific vehicle environment. In case that probability is above a predefined threshold, typically the interaction with vehicle control system is initiated using arbitrary automotive interfaces. Corresponding predefined actions are taken in that case. The predefined actions could be one or combination of the following: audio signal alerts to driver, inside cabin light condition change, engine operation condition change, opening of the windows or corresponding communication using arbitrary wireless means to outside vehicle environment. Optionally, the system is utilizing additional parameters like vehicle cabin temperature and/or timing information about engine stop and driver leaving the car. Preferably, the system is using 60 GHz or 77-79 GHz integrated radar front end working in Doppler operation mode, with 4×4 Tx and Rx planar radiation elements, with physical size typically in the range 4×2×1 cm, or smaller.

A laser interference lithography system with a pattern locking function comprises a laser, a reflector, a beam splitter, a substrate stage, a substrate and a pattern locking device. A laser beam emitted by the laser is split into an exposure beam and a reference beam by a spectroscope; the exposure beam passes through the beam splitter, and is reflected to the substrate on the substrate stage by the reflector to realize interference; the interference patterns can realize pattern record transfer by exposing the substrate; and the patterns are locked by the pattern locking device to prevent pattern drift during exposure. The pattern locking device includes a null phase meter, an electronic signal processing component, a controller, a driver and a phase modulation executing, wherein the null phase meter is used for measuring pattern phase drift; the pattern phase drift is fed back to the controller through the signal processing component; and the controller controls the phase modulation executer to realize phase locking through the driver. The laser interference lithography system provided by the invention has the advantages of simple structure, high pattern locking accuracy and the like, and is a key system for realizing large-area high-accuracy grating fabrication.

The invention relates to a multiple-redundancy variable master-slave fire alarm monitoring system and method. The multiple-redundancy variable master-slave fire alarm monitoring system solves the problems that a monitoring system in the prior art is weak in real-time performance, is free of key prevention and control differentiation, and fails to work easily when a fault occurs. The system comprises a plurality of control nodes, a master monitoring master computer, a database and a node configuration terminal. Each control node comprises a controller module, a double-redundancy network module, a USB module, a storage module and a fire monitoring module. Each double-redundancy network module is provided with two network interfaces, each network interface is connected to one network exchange unit, the node configuration terminal is connected with the USB module of each control node, the database is connected with the node configuration terminal and the master monitoring master computer respectively, and the master monitoring master computer is connected with the two network exchange units respectively. The system can automatically adjust master-slave relationships according to fault situations and automatically switch the network interfaces and the network exchange units, and therefore the reliability and stability of key systems like the fire alarm monitoring system are greatly improved.

A computing system and architecture is provided that affects and extends services exported through application libraries. The system has an operating system having an operating system kernel having OS critical system elements (OSCSEs) for running in kernel mode; and, a shared library having critical system elements (SLCSEs) stored within the shared library for use by the software applications in user mode. The SLCSEs stored in the shared library are accessible to the software applications and when accessed by a software application forms a part of the software application. When an instance of an SLCSE provided to an application from the shared library it is ran in a context of the software application without being shared with other software applications. The other applications running under the operating system each have use of a unique instance of a corresponding critical system element for performing essentially the same function, and can be run simultaneously.

The invention discloses a time-triggered embedded task scheduling device and a time-triggered embedded task scheduling method. The device comprises a static time schedule storage module, a distributed bus time interruption module, a computer local clock interruption module and a task scheduler module. The device and the method disclosed by the invention have the advantages that the task scheduler module is used for switching attributes of a time point according to all tasks predefined in a static time schedule, realizing synchronous execution of distributed nodes by utilization of the distributed bus time interruption module, and monitoring whether task execution time is beyond the worst execution time or not by utilization of the computer local clock interruption module, so that the certainty of the operation of a safety-critical system is guaranteed by utilization of less system overhead.

A method for automatically decomposing a dynamic system model into separate submodels for ultimate execution on diverse target platforms is provided. Embodiments of the invention provide a way for a system designer to indicate which portions of a previously-specified system model are to become submodels. Optionally, the designer may also indicate the associated target platform for the execution of each submodel. A system submodel for each portion designated by the designer is generated, keeping all critical system-level information consistent throughout the entire system model. Each of these system submodels may then be employed to generate a software version of each system submodel. Each software submodel may then be transferred to its specified target platform and executed in cooperation with the other software submodels to effect an overall system simulation executing across the associated target platforms. Alternately, one or more system submodels may be replaced by the actual components of the dynamic system represented by those system submodels.