Abstract: A system can include a memory device and a processing device operatively coupled with the memory device, to perform operations including recording, in a change log associated with a snapshot of a data object, an entry reflecting a change made by a first host application to the data object, wherein the entry contains information reflecting a current state of a part of the data object; receiving a request to read the part of the data object; determining whether the request is received from the first host application; and responsive to determining that the request is received from the first host application, retrieving the part from the entry of the change log.

Abstract: A system can include a memory device and a processing device operatively coupled with the memory device, to perform operations including recording, in a change log associated with a snapshot of a data object, an entry reflecting a change made by a first host application to the data object, wherein the entry contains information reflecting a current state of a part of the data object; receiving a request to read the part of the data object; determining whether the request is received from the first host application; and responsive to determining that the request is received from the first host application, retrieving the part from the entry of the change log.

Abstract: A system can include a memory device and a processing device operatively coupled with the memory device, to perform operations including receiving, from a first host application, a data object to store on the memory device and associating an object identifier with physical address ranges. The operations can further include associating the object identifier with a snapshot identifier to define a snapshot and mapping the physical address ranges to corresponding virtual address ranges of a second host application. The operations can also include responsive to receiving, from the first host application, a request to write to the data object recording, in a change log, an entry reflecting a change made to the data object, and responsive to receiving, from the first host application, a request to read a part of the data object, retrieving the part from the entry of the change log.

Abstract: A system can include a memory device and a processing device operatively coupled with the memory device, to perform operations including receiving, from a first host application, a data object to store on the memory device and associating an object identifier with physical address ranges. The operations can further include associating the object identifier with a snapshot identifier to define a snapshot and mapping the physical address ranges to corresponding virtual address ranges of a second host application. The operations can also include responsive to receiving, from the first host application, a request to write to the data object recording, in a change log, an entry reflecting a change made to the data object, and responsive to receiving, from the first host application, a request to read a part of the data object, retrieving the part from the entry of the change log.

Abstract: A method and assay are described for measuring the interaction between a ligand and an analyte. The assay can include a suspension of colloidal particles that are associated with a ligand of interest. The colloidal particles are maintained in the suspension at or near a phase transition state from a condensed phase to a dispersed phase. An analyte to be tested is then added to the suspension. If the analyte binds to the ligand, a phase change occurs to indicate that the binding was successful.

Abstract: This invention provides a novel class of substituted macrocyclic metallic complexes. The complexes are useful as peroxynitrite decomposition catalysts. Pharmaceutical compositions, and methods of making and using the compounds, or a pharmaceutically acceptable salt, hydrate, prodrug, or mixture thereof are also described.

Abstract: A method and system for fault isolation within a network element in an optical network is described. A single fault in the system can give rise to multiple alarms detected at multiple points. Finding the root cause alarm corresponding to the fault that has triggered these alarms is important for fault isolation and is the focus of attention for this invention. The network element is modeled by a directed acyclic graph that captures the interactions among various components in the network element. Using a graph-based technique the invention analyzes the various topological faults raised and their locations for identifying root cause alarms and masking all correlated alarms.