A Survey on Sensor Networks
... SMP is a management protocol that provides the software operations needed to perform the following administrative tasks: – introducing the rules related to data aggregation, attribute-based naming and clustering to the sensor nodes, – exchanging data related to the location ...
... SMP is a management protocol that provides the software operations needed to perform the following administrative tasks: – introducing the rules related to data aggregation, attribute-based naming and clustering to the sensor nodes, – exchanging data related to the location ...
Manual
... Free Space: Predicts received signal strength when the transmitter and receiver have a clear, unobstructed line-of-sight path between them. Received power decays as a function of the T-R separation distance. Rayleigh Fading Distribution: The Rayleigh Fading Distribution is used to describe the stati ...
... Free Space: Predicts received signal strength when the transmitter and receiver have a clear, unobstructed line-of-sight path between them. Received power decays as a function of the T-R separation distance. Rayleigh Fading Distribution: The Rayleigh Fading Distribution is used to describe the stati ...
Chord: A Scalable Peer-to-peer Lookup Service for Internet Applications Ion Stoica
... mapping documents to nodes, and Freenet-style query routing [18]. As a result, it shares some of the weaknesses of Freenet. Archival Intermemory uses an off-line computed tree to map logical addresses to machines that store the data [3]. The Globe system [2] has a wide-area location service to map o ...
... mapping documents to nodes, and Freenet-style query routing [18]. As a result, it shares some of the weaknesses of Freenet. Archival Intermemory uses an off-line computed tree to map logical addresses to machines that store the data [3]. The Globe system [2] has a wide-area location service to map o ...
Chord: A Scalable Peer-to-peer Lookup Service for Internet Applications Ion Stoica
... mapping documents to nodes, and Freenet-style query routing [18]. As a result, it shares some of the weaknesses of Freenet. Archival Intermemory uses an off-line computed tree to map logical addresses to machines that store the data [3]. The Globe system [2] has a wide-area location service to map o ...
... mapping documents to nodes, and Freenet-style query routing [18]. As a result, it shares some of the weaknesses of Freenet. Archival Intermemory uses an off-line computed tree to map logical addresses to machines that store the data [3]. The Globe system [2] has a wide-area location service to map o ...
Document
... • Much of the research and development that led to the UNIX operating system came from the Multiplexed Information and Computing Service (MULTICS) project that was started in 1965 by the Massachusetts Institute of Technology (MIT), General Electric (GE), and AT&T Bell Laboratories • Ken Thompson, on ...
... • Much of the research and development that led to the UNIX operating system came from the Multiplexed Information and Computing Service (MULTICS) project that was started in 1965 by the Massachusetts Institute of Technology (MIT), General Electric (GE), and AT&T Bell Laboratories • Ken Thompson, on ...
Chapter 8: Virtual Memory
... Invalid reference abort, terminate the process Valid reference page it in when it is not in memory 2. Find a free frame (taking one from the free-frame list) 3. Schedule a disk operation to read the desired page into the new frame 4. Reset tables to indicate the page is now in memory: Set va ...
... Invalid reference abort, terminate the process Valid reference page it in when it is not in memory 2. Find a free frame (taking one from the free-frame list) 3. Schedule a disk operation to read the desired page into the new frame 4. Reset tables to indicate the page is now in memory: Set va ...
Total cost of ownership – Linux vs. QNX realtime operating system
... to demonstrate that the code's presence does not affect the operation of the system. Proving a negative such as that is quite difficult. These are all likely major areas of focus and areas needing control within your project. ...
... to demonstrate that the code's presence does not affect the operation of the system. Proving a negative such as that is quite difficult. These are all likely major areas of focus and areas needing control within your project. ...
Detecting Wormhole Attacks in Wireless Sensor Networks
... Indeed, a wormhole attack is feasible even when the network infrastructure provides confidentiality and authenticity, and the attacker does not have the cryptographic keys. Several methods have been proposed for detecting wormhole attacks in ad hoc networks and WSNs. However, these methods usually r ...
... Indeed, a wormhole attack is feasible even when the network infrastructure provides confidentiality and authenticity, and the attacker does not have the cryptographic keys. Several methods have been proposed for detecting wormhole attacks in ad hoc networks and WSNs. However, these methods usually r ...
Threading
... allow multiple executions of streams. In many respect, threads are popular way to improve application through parallelism. The CPU switches rapidly back and forth among the threads giving illusion that the threads are running in parallel. Like a traditional process i.e., process with one thread, a t ...
... allow multiple executions of streams. In many respect, threads are popular way to improve application through parallelism. The CPU switches rapidly back and forth among the threads giving illusion that the threads are running in parallel. Like a traditional process i.e., process with one thread, a t ...
ch8
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the ...
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the ...
I R T R ECHNICAL
... be achieved for a given channel bandwidth of W bits/sec. Under the same conditions, they demonstrate that O(W/2N ) is asymptotically feasible. Then authors introduce clustering where this time base stations are placed on equally separated grid points. Each sensor directs its traffic towards the clos ...
... be achieved for a given channel bandwidth of W bits/sec. Under the same conditions, they demonstrate that O(W/2N ) is asymptotically feasible. Then authors introduce clustering where this time base stations are placed on equally separated grid points. Each sensor directs its traffic towards the clos ...
overlay network - Communications
... • Overlay Manager: Server for storing and downloading overlay configurations Next version (parts are done, release in Summer 2004): – “MessageStore”: Enhanced data services, e.g., end-to-end reliability, persistence, streaming, etc. – HyperCast for mobile ad-hoc networks on handheld devices – Servic ...
... • Overlay Manager: Server for storing and downloading overlay configurations Next version (parts are done, release in Summer 2004): – “MessageStore”: Enhanced data services, e.g., end-to-end reliability, persistence, streaming, etc. – HyperCast for mobile ad-hoc networks on handheld devices – Servic ...
Chapter 9 - cse.sc.edu
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the interrupted ...
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the interrupted ...
Chap. 9, Virtual Memory Management
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the interrupted ...
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the interrupted ...
15-744: Computer Networking
... • Updates handled by signing indirect file with public/private key • Collisions for insert of new indirect file handled specially check to ensure same key used for signing ...
... • Updates handled by signing indirect file with public/private key • Collisions for insert of new indirect file handled specially check to ensure same key used for signing ...
Routing-distancevector
... • Solution 2: Never advertise the cost to a neighbor if this neighbor is the next hop on the current path (Split Horizon) – Example: A would not send the first routing update to B, since B is the next hop on A’s current route to C – Split Horizon does not solve count-to-infinity in all cases! ...
... • Solution 2: Never advertise the cost to a neighbor if this neighbor is the next hop on the current path (Split Horizon) – Example: A would not send the first routing update to B, since B is the next hop on A’s current route to C – Split Horizon does not solve count-to-infinity in all cases! ...
Silberschatz, Galvin and Gagne ©2011 Operating System Concepts
... Invalid reference abort, terminate the process Valid reference page it in when it is not in memory Find a free frame (taking one from the free-frame list) Schedule a disk operation to read the desired page into the new frame Reset tables to indicate the page is now in memory: Set validation ...
... Invalid reference abort, terminate the process Valid reference page it in when it is not in memory Find a free frame (taking one from the free-frame list) Schedule a disk operation to read the desired page into the new frame Reset tables to indicate the page is now in memory: Set validation ...
Chapter 1 – 15 Essay Question Review
... 8. Describe two approaches to provide direct sharing of resources in a virtual-machine concept. Ans: First, it is possible to share a minidisk, and thus to share files. This scheme is modeled after a physical shared disk, but is implemented by software. Second, it is possible to define a network of ...
... 8. Describe two approaches to provide direct sharing of resources in a virtual-machine concept. Ans: First, it is possible to share a minidisk, and thus to share files. This scheme is modeled after a physical shared disk, but is implemented by software. Second, it is possible to define a network of ...
Chord: A Scalable P2P Lookup Service for Internet Applications
... servers. DNS names are structured to reflect administrative boundaries; Chord imposes no naming structure. DNS is specialized to the task of finding named hosts or services, while Chord can also be used to find data objects that are not tied to particular machines. The Freenet peer-to-peer storage s ...
... servers. DNS names are structured to reflect administrative boundaries; Chord imposes no naming structure. DNS is specialized to the task of finding named hosts or services, while Chord can also be used to find data objects that are not tied to particular machines. The Freenet peer-to-peer storage s ...
ppt - UCI
... Multicast Communication •Transport mechanism and network layer must support multicast •Internet multicast limited to UDP (not TCP) Unreliable: No acknowledgements or other error recovery schemes (perhaps at application level) Connectionless: No connection setup (although there is routing informat ...
... Multicast Communication •Transport mechanism and network layer must support multicast •Internet multicast limited to UDP (not TCP) Unreliable: No acknowledgements or other error recovery schemes (perhaps at application level) Connectionless: No connection setup (although there is routing informat ...
Distributed operating system
A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system. Each subset is a composite of two distinct service provisioners. The first is a ubiquitous minimal kernel, or microkernel, that directly controls that node’s hardware. Second is a higher-level collection of system management components that coordinate the node's individual and collaborative activities. These components abstract microkernel functions and support user applications.The microkernel and the management components collection work together. They support the system’s goal of integrating multiple resources and processing functionality into an efficient and stable system. This seamless integration of individual nodes into a global system is referred to as transparency, or single system image; describing the illusion provided to users of the global system’s appearance as a single computational entity.