Abstract: Processes and systems for quenching an effluent. In certain embodiments, the process can include contacting a pyrolysis effluent and a first quench medium to produce a first quenched effluent. A bottoms stream that can include tar and an overhead stream that can include ethylene and propylene can be obtained from the first quenched effluent. The first quench medium can include a first portion of the bottoms stream that can include a first portion of the tar. In certain embodiments, the process can also include hydroprocessing a second portion of the bottoms stream that can include a second portion of the tar to produce a hydroprocessed product. A hydroprocessed bottoms stream can be obtained from the hydroprocessed product. In certain embodiments, the process can also include contacting at least a portion of the hydroprocessed bottoms stream and the first portion of the bottoms stream to produce the first quench medium.

Abstract: The present disclosure relates to processes, methods, systems, and apparatus for steam cracking hydrocarbon in a pyrolysis furnace having a convection zone and a radiant zone. The convection zone includes three heat exchangers in series with a serpentine arrangement. A fluid source is disposed each heat exchanger to provide steam into the heat exchangers. The present disclosure further relates to a process of adjusting the stream flow rate for each fluid source to control operating conditions such as flue gas temperature, stack temperatures, and temperatures of other components of the furnace.

Abstract: Methods, computer-readable storage media and systems are described for constructing a three-dimensional electronic library of simulated decays of the diffusion-weighted 1H2O MR signal in b-space. Methods, computer-readable media, and systems are described for preparing a parametric tissue map for tissue in a subject. Computer readable media, having an electronic library of simulated decays of the diffusion-weighted 1H2O signal in b-space and method of using such a library.

Abstract: Methods, computer-readable storage media and systems are described for constructing a three-dimensional electronic library of simulated decays of the diffusion-weighted 1H2O MR signal in b-space. Methods, computer-readable media, and systems are described for preparing a parametric tissue map for tissue in a subject. Computer readable media, having an electronic library of simulated decays of the diffusion-weighted 1H2O signal in b-space and method of using such a library.

Abstract: Provided herein are methods and apparatuses for determining a level of cellular metabolic activity for a region of interest in order to detect and map on-going gliovascular unit metabolic activity using high-resolution 1H2O MRI. In one example approach, a computer-implemented method includes receiving a first set of DCE-MRI time-course data for a region, wherein a contrast agent is administered prior to imaging, identifying a region of interest from the first set of DCE-MRI time-course data for further analysis, performing shutter-speed pharmacokinetic analysis of the time-course data associated with the region of interest using computer-implemented software to obtain a finite and non-zero mean water molecule capillary lifetime in the region of interest, and indicating a level of cellular metabolic activity in the brain based on the mean water molecule capillary lifetime.

Abstract: Disclosed are methods and systems for calculating a contrast reagent (CR) extravasation rate constant and generating a contrast reagent leakage corrected relative cerebral blood volume (rCBV) image map of a brain region from dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI) time-course image data based on pharmacokinetic first principles. In one example approach, a computerized method may include performing a linearization transform of a DSC MRI time-course equation which accounts for an intravascular contribution and an extravasating component, and calculating CR leakage from a slope of a linear portion of the transformed data.

Abstract: This invention relates to solvents for extracting C1 to C4 carboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a phosphonium cation and an arylcarboxylate anion. The extraction solvents may further include one or more non-ionic liquid organic solvents as an enhancer. The extraction solvents are useful for extracting aqueous mixtures containing one or more lower carboxylic acids, such as monocarboxylic acids, alkoxycarboxylic acids, and halogen-containing carboxylic acids.

Abstract: Disclosed are methods and systems for calculating a contrast reagent (CR) extravasation rate constant and generating a contrast reagent leakage corrected relative cerebral blood volume (rCBV) image map of a brain region from dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI) time-course image data based on pharmacokinetic first principles. In one example approach, a computerized method may include performing a linearization transform of a DSC MRI time-course equation which accounts for an intravascular contribution and an extravasating component, and calculating CR leakage from a slope of a linear portion of the transformed data.

Abstract: Provided herein are methods and apparatuses for determining a level of cellular metabolic activity for a region of interest in order to detect and map on-going gliovascular unit metabolic activity using high-resolution 1H2O MRI. In one example approach, a computer-implemented method includes receiving a first set of DCE-MRI time-course data for a region, wherein a contrast agent is administered prior to imaging, identifying a region of interest from the first set of DCE-MRI time-course data for further analysis, performing shutter-speed pharmacokinetic analysis of the time-course data associated with the region of interest using computer-implemented software to obtain a finite and non-zero mean water molecule capillary lifetime in the region of interest, and indicating a level of cellular metabolic activity in the brain based on the mean water molecule capillary lifetime.

Abstract: I/O measurement data for channels attached to logical control unit queues is obtained related to a plurality of logical control unit queues. A store secondary queue measurement data instruction specifies a range of queues for which extended secondary measurement blocks derived from the I/O measurement data are stored at a memory address specified by the store secondary queue measurement data instruction.

Abstract: An Extended Input/output (I/O) measurement block facility is emulated. The facility provides for the collection of relevant I/O measurement data, and the storing for later efficient retrieval of that data in an extended measurement block. The stored data relates to the performance of an I/O subchannel.

Abstract: A combined PET/MRI scanner generally includes a magnet for producing a magnetic field suitable for magnetic resonance imaging, a radiofrequency (RF) coil disposed within the magnetic field produced by the magnet and a ring tomograph disposed within the magnetic field produced by the magnet. The ring tomograph includes a scintillator layer for outputting at least one photon in response to an annihilation event, a detection array coupled to the scintillator layer for detecting the at least one photon outputted by the scintillator layer and for outputting a detection signal in response to the detected photon and a front-end electronic array coupled to the detection array for receiving the detection signal, wherein the front-end array has a preamplifier and a shaper network for conditioning the detection signal.

Abstract: I/O measurement data associated with the performance of an I/O operation process is gathered during the I/O process. The I/O measurement data is saved in an IRB memory location specified by a test subchannel instruction. An I/O interrupt signals the completion of the I/O operation process.

Abstract: Systems and arrangements to adjust resource accessibility based upon usage modes are contemplated. Embodiments may include a supervisor instance such as an operating system that is adapted to select one or more supervisor keys from a set of supervisor keys available to the host node or platform upon which the supervisor instance is operating. The supervisor instance may select the supervisor key(s) based upon an association of the supervisor instance with a usage mode represented by a supervisor key name. In many embodiments, supervisor key names may be associated with resources via with one or more of the supervisor keys based upon the resources needed when operating in the usage modes by a system administrator. Once the supervisor instance is initialized, the supervisor instance may issue client keys that allow access to subsets of the resources available to the supervisor instance based upon usage modes of the clients.

Abstract: A method and apparatus for the production of hydrogen-rich gas are provided. The method and apparatus prevent over-reduction of iron oxide-based shift catalyst by introducing an oxidative stream along with a carbon monoxide containing gaseous feed stream from a catalytic steam reformer to the catalyst bed region and thereby limits structural deterioration of the catalyst. Various sources may provide the oxidative stream including a shift catalyst bed region and a selective oxidation catalyst region.

Abstract: I/O adapters, such as InfiniBand™ host channel adapters (HCAs) or iWarp remote network interface cards (RNICs) use work requests to pass information to a queue pair and work completions to determine when a work request has completed. Timing information in various stages of processing of these work requests allow a workload manager to identify sources of delay that impacts transaction processing. Work requests request processing that can be marked with a timestamp. Processing stages include: (1) the time when the work request is posted to the send queue, (2) the time when the first packet is sent on the link for that work request, (3) the time at which the work request has completed its processing, and (4) the time when the work completion is retrieved by the software. By comparing the timestamps, the workload manager determines the processing and transaction times.

Abstract: A method for authenticating a requesting entity in a communications environment. In an exemplary embodiment, the method includes determining a client identification of a client node associated with the requesting entity, and determining whether the requesting entity associated with the client node is acting in a supervisor capacity. A key to the requesting entity is returned from a resource provider node upon determining that the client identification of the client node indicates that the client node is permitted to access one or more resources of the provider node, and that the client node is acting in a supervisor capacity.

Abstract: A method for supervisor partitioning of client resources in a communications environment includes receiving, at a client node, an allocated set of resources over a communications network, and partitioning the allocated set of resources among one or more applications associated with the client node using a local authority. Following the partitioning, communication requests are issued from the one or more applications to a shared resource provider node without inspection by the local authority.

Abstract: An Input/output (I/O) measurement block facility is provided that creates subchannel measurement blocks (comprising device busy values) related to performance of an I/O operation of a subchannel, wherein a device busy time value is a sum of time intervals when the subchannel is device busy during an attempt to initiate any one of a start function or a resume function at the subchannel.

Abstract: A method, apparatus, and computer program product are disclosed for collecting data about the transmission of network packets that are associated with specified applications. The packets are transmitted through a communications network fabric that is used to couple data processing systems together. A particular existing single bit in a frame header definition is selected. The bit is defined as part of the standard frame header by a communication protocol as an available bit in the frame header. The standard protocol is unchanged by the selection of this bit. An application is specified to be monitored. The selected bit is then set in each network packet that is generated by the specified application. The fabric collects performance data for each packet that has the bit set. Thus, the fabric collects performance data about a transmission of each packet that is generated by the application when that application is setting the bit.