Topic
State (computer science)
About: State (computer science) is a research topic. Over the lifetime, 24436 publications have been published within this topic receiving 225733 citations.
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28 Sep 1984
TL;DR: Dual port memory as mentioned in this paper enables consecutive access operations from an arbitrary address, which includes a memory array, a random access peripheral circuit for effecting random access to the array, and a counter, a setting circuit for setting the counting state of the counter at an optional value.
Abstract: Dual port memory which enables consecutive access operations from an arbitrary address. The memory includes a memory array, a random access peripheral circuit for effecting random access to the array, a counter, a setting circuit for setting the counting state of the counter at an optional value, a selection circuit for consecutively selecting the array in response to the output of the counter, and a control circuit for advancing the state of the counter in response to a shift pulse.
81 citations
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TL;DR: It is shown that an attacker that compromises the communication infrastructure of a single control center in an interconnected power system can successfully perform a denial-of-service attack against state-of theart distributed SE, and consequently, it can blind the system operators of every region.
Abstract: State estimation (SE) plays an essential role in the monitoring and supervision of power systems. In today's power systems, SE is typically done in a centralized or in a hierarchical way, but as po ...
81 citations
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14 Jun 2002
TL;DR: In this article, the authors present a method and apparatus for maintaining a networked computer system including first and second nodes and an event processing server, the method comprising the first two nodes detecting changes in state, the event processor receiving notification of the changes in states from the first and the second nodes, and the event process server correlating changes in detected in the first node and executing a maintenance decision which affects the second node.
Abstract: The invention provides method and apparatus for maintaining a networked computer system including first and second nodes and an event processing server, the method comprising the first and second nodes detecting changes in state, the event processing server receiving notification of the changes in state from the first and second nodes, the event processing server correlating changes in state detected in the first and second nodes, and the event processing server executing a maintenance decision which affects the first and second nodes The detecting, transmitting, correlating, and executing occurs without human intervention
81 citations
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02 Jun 1994TL;DR: In this article, a memory device with m possible states, where m is at least 2, is described, and the memory device includes a multiplexed pair of output paths, wherein each output path is coupled to sense the state of a memory cell and includes a read path circuit, a column load circuit, and a comparator.
Abstract: A memory device is disclosed which includes memory cells having m possible states, where m is at least 2. The memory device includes a multiplexed pair of output paths, wherein each output path is coupled to sense the state of a memory cell and includes a read path circuit, a column load circuit, and a comparator. Provided between the pair of output paths is a switching circuit for coupling the comparators to one another in response to a control signal. For single-bit read operations, each output path senses and outputs the data of the associated memory cell, and the control signal is inactive. When the control signal is active, the read path circuit and column load circuit of one of the output paths is disabled and the switching circuit couples the other read path circuit to the second comparator such that the state of the memory cell is sensed by two comparators.
81 citations
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04 Aug 1997
TL;DR: In this paper, the authors present a system that automatically and securely executes registered programs immediately prior to a transition to a reduced energy consumption state using a registry table specifying registered programs and a secure modification detection value for each registered program.
Abstract: A computer system that automatically and securely executes registered programs immediately prior to a transition to a reduced energy consumption state. A registrar table specifying registered programs and a secure modification detection value for each registered program are maintained in system management mode memory or other secure memory space in the computer system. A system management interrupt is generated following a request to remove power from the computer system or the occurrence of an event that triggers an energy saving mode. The system management interrupt handler routine then generates a current modification detection value for each registered program. The current modification detection values are compared with the secure modification detection values. Execution of a registered program is permitted if the values match. After all registered programs have been executed, the computer system automatically powers down or enters an energy saving mode. The computer system thereby allows secure and convenient execution of programs or commands that would typically interfere with normal computer use.
81 citations