摘要:
In the preparation of dispersions of magnetic pigments, it was found that excellent dispersion stability is achieved when compounds which are selected from the group consisting of quaternary ammonium compounds, guanidines, piperidines, alkylated or ethoxylated amines, diamines, polyamines or mixtures thereof, ethanolic KOH solutions, metal alkoxylates, Grignard compounds and certain metal hydrides are used as codispersants. The compounds are added in an amount of 0.15-4% by weight, based on the magnetic pigment.
摘要:
In the preparation of dispersions of magnetic pigments in organic solvents, dispersants which have a sterically stabilizing effect are used. Milling results in division of the pigment aggregates, which combine again as a result of attractive forces to give secondary agglomerates in the event of poor stabilization. These flocculating materials must be removed from the dispersion by expensive filtration. If an increase in the fineness or pigment batch fluctuations lead to an increase in the secondary agglomerates, filter breakthroughs may occur, resulting in a dramatic reduction in the yield of magnetic recording medium. It was found that excellent dispersion stability is achieved when the magnetic pigments are first precoated with a long-chain dispersant. Subsequently, the use of charge-generating, low molecular weight codispersants, a charge build-up on the pigment is specifically induced by means of bases or acids. The electrostatic repulsion which additionally becomes effective leads to an increase in the dispersion stability. The charges on the pigment are monitored by means of ESA measurements (electrokinetic sound amplitude). These ESA measurements make it possible to establish the order of addition of the dispersants and the optimum amount of codispersant.
摘要:
Methods and apparatus for cell processors are disclosed. A policy module is loaded from a main memory of a cell processor into the local memory of a selected synergistic processing unit (SPU) under control of an SPU policy module manager (SPMM) running on the SPU. The policy module loads a work queue from the main memory into the local memory of the SPU. The policy module interprets and process one or more tasks from the work queue on the SPU. The selected SPU performs the task(s) and after completion or upon a pre-emption, returns control of the SPU to the SPMM.
摘要:
An overlay network uses flexible neighbor selection based on network address translation (NAT) to define routing between nodes. The NAT type is used as a flexible neighbor selection criteria, either alone or in conjunction with other criteria. A method of selecting a neighboring node for a first node in a distributed hash table network includes determining a desired key value for a node finger table entry and requesting a set of candidate neighboring nodes near this desired key value. The method determines a network address translation type of each of the set of candidate neighboring nodes and ranks the set of candidate neighboring nodes accordingly. The method selects one of the set of candidate neighboring nodes based on the ranking. The NAT types of candidate neighboring nodes are determined by sending probe messages or from data received from a central overlay network server.
摘要:
The distribution of content over a peer to peer (P2P) network can be improved by utilizing at least one broadcast of the content in order to quickly seed the P2P network. When content is first to be distributed across the network, a broadcast can be scheduled that each peer device with broadcast receiving capability and within range of the broadcast is able to receive. As soon as a peer device receives at least a portion of the broadcast content, that peer can begin redistributing the content across the P2P network. Any errors or missing portions of the received broadcast content can be corrected by requesting a copy of the missing or incorrect portion from another peer on the P2P network.
摘要:
Forward error correction may be implemented in a network having first, second and third nodes. The second node receives streaming media message packets and one or more check packets from an upstream first node. The second node transmits the message packets and check packets to a downstream third node. The second node uses the check packets to decode missing message packets and transmits the decoded missing packets to the third node before the missing message packets are to be presented by the third node. The third node may receive message packets and a first set of check packets from the second node and a second set of check packets from the first node. The third node may use check packets from both sets to decode missing message packets.
摘要:
Network bandwidth detection and distribution and prioritizing network traffic among two or more distinct channels of communication within a single application in a node configured to communicate with one or more other nodes over a network is disclosed. For a particular time quantum, a bandwidth quantum may be distributed amongst two or more communication channels according to priorities associated with those channels.
摘要:
Broadcast messages are efficiently directed to nodes of an overlay network. Broadcast messages include an End ID parameter specifying the range of key values for nodes that should receive the broadcast message. Each node of an overlay network maintains a list of finger nodes and their respective key values. Upon receiving a broadcast message, a node assigns a finger node a new End ID value based upon the End ID value of the broadcast message or the key value of an adjacent finger node. The node compares a finger node's new End ID value with the finger node's key value to determine whether to forward the broadcast message to that finger node. A broadcast message forwarded to a finger node includes an End ID parameter equal to the new End ID value determined for the finger node. Nodes can aggregate response messages from its finger nodes.
摘要:
A client device configured to interact with an interactive environment, a computer implemented method for obtaining auxiliary content in such a device, a mediation server, a computer implemented method for managing distribution of auxiliary content with such a server, an auxiliary content distribution method and an auxiliary content distribution system are disclosed
摘要:
Atomic operations may be implemented on a processor system having a main memory and two or more processors including a power processor element (PPE) and a synergistic processor element (SPE) that operate on different sized register lines. A main memory address containing a primitive is divided into a parity byte and two or more portions, wherein the parity byte includes at least one bit. A value of the parity byte determines which of the two or more portions is a valid portion and which of them is an invalid portion. The primitive is of a memory size that is larger than a maximum size for atomic operation with the PPE and less than or equal to a maximum size for atomic operation with the SPE. Read with reservation and conditional write instructions are used by both the PPE and SPE to access or update a value of the atomic.