Abstract: Proposed is an apparatus and method for contactlessly sensing a biological signal and recognizing a user's physiological information using same. The operating method of the sensing apparatus for contactlessly sensing biological signals may include a process of performing an initial setting in a contactless sensing apparatus, a process of obtaining video data from the contactless sensing apparatus, a process of removing noise from the video data, a process of extracting only a region of interest from the video data, and a process of estimating information on biological activity by analyzing the region of interest.

Abstract: The present disclosure relates to the technical field of magnesium metallurgy, and in particular to a device and method for magnesium smelting by vacuum carbothermal reduction of calcined dolomite. The device includes a reaction chamber, a condensation chamber, a first temperature regulation module and an air pressure regulation module, and the reaction chamber is communicated with the condensation chamber via a gas-guide tube. In the present disclosure, different condensation zones are utilized to sequentially condense gaseous products based on dew points, effectively preventing impurities from entering the condensation process of magnesium.

Abstract: A blockchain sharding method combining spectral clustering and a reputation value mechanism includes: obtaining, every other account grouping cycle Ta, account transaction data recorded during operation of a blockchain to generate an account transaction graph; obtaining an adjacency similarity matrix W and a degree matrix D based on the account transaction graph; generating a Normalized Laplace matrix L based on the adjacency similarity matrix W and the degree matrix D, performing dimension reduction on L to obtain a feature matrix F, and then clustering the feature matrix F with a clustering dimension of k by row through a K-means clustering method; and dividing blockchain accounts into k groups based on an obtained clustering result, and allocating accounts in the k groups to k blockchain shards.

Abstract: Data Integrity Field (DIF) is used to implement compression verification. When a write IO operation is received, the write IO operation is divided into data blocks, and a respective DIF is created and appended to each data block. When the write IO is compressed, the data blocks and respective DIF are collectively compressed to form compressed data. The compressed data is divided into compressed data blocks, and a respective second DIF is created and appended to each respective data block of compressed data. To verify that the compressed data is able to be decompressed, a copy of the compressed data is decompressed to restore the original data blocks and respective DIF. Each respective DIF is used to verify the content of its respective data block. In response to a determination that respective DIF match the respective data blocks, the decompression process is deemed to be verified.

Abstract: A Ransomware Activity Detection System (RADS) characterizes historic read/write IO activity on a storage volume, and also characterizes historic data characteristics of the storage volume, such as the percentage reducibility of the data held in the storage volume. The RADS monitors the storage volume to identify differences between current read/write IO activity and historic read/write IO activity, as well as difference between current data characteristics of the storage volume and historic data characteristics of the storage volume. When the RADS detects a significant difference in read/write IO activity on a storage volume, that is coupled with a significant changes to the data characteristics of the storage volume, the RADS protects the storage volume and generates an alert of the possible occurrence of a ransomware attack. Protection may occur prior in connection with any bulk read operation to proactively protect storage volumes against ransomware attacks.

Abstract: Disclosed are a blockchain sharding method and system based on a convolutional neural network-long short-term memory (CNN-LSTM) prediction model. The method includes: using a double-layer chain system architecture, namely a vehicle layer and an edge layer; and using a delegated byzantine fault tolerance (DBFT) as a consensus protocol of a network at the vehicle layer and using proof of authority (POA) as a consensus protocol at the edge layer. Load balancing of the blockchain sharding system is optimized through a CNN-LSTM prediction model. A transaction status of the entire sharding network in a next period is predicted. Hot accounts are effectively allocated through a designed account allocation algorithm. The blockchain sharding method can maintain load balancing of shards, reduce cross-shard transactions, and implement effective utilization of resources. Malicious behavior of nodes is restricted. Security of the network is ensured.

Abstract: One or more aspects of the present disclosure relate to performant destaging of write pending (WP) data to disk. In embodiments, an input/output (IO) workload is received at a storage array. Additionally, the IO workload can include an IO request with a random write request. Further, a write destage context for write-pending (WP) data corresponding to the random write request can be generated by a data services engine of the storage array. In addition, using the write destage context, a disk adapter (DA), at a backend of the storage array, is enabled to destage write-pending (WP) data without reading from a target write location of the random write request on a storage device on the storage array.

Abstract: In a storage system where Front-End (FE) tracks do not correspond to Back-End (BE) tracks on a one-to-one basis, a Logical Entry (LE) table is implemented in the BE processes to enable masking to occur on BE Logical Entry values rather than on BE tracks. An LE watch table is used to correlate LE values with BE tracks. When a RAID slice destage is initiated to move data from the FE tracks to BE tracks implementing the RAID slice, the LE watch table is used to identify a respective set of LE values that correspond to each respective RAID slice BE track. Entries of the BE mask corresponding to the LE values identified from the LE watch table are used to identify FE tracks that contain data to be included in the RAID slice destage. Metadata is retrieved for each identified FE track, and the RAID slice destage is implemented.

Abstract: A heating, ventilation, and/or air condition (HVAC) system includes a heat exchanger with at least one spring tube wound in a geometric configuration formed around a geometric axis. A passage through the spring tube is configured to transport a working fluid therethrough to facilitate heat exchange between the working fluid and air directed over an exterior of the at least one spring tube.

Abstract: An example methodology includes provisioning memory of a storage array with cache memory including a plurality of cache slots and reading data from the memory of the storage array into a first cache slot of the plurality of cache slots, wherein the data in the first cache slot is in a first data format, the first data format being the format of data in the memory of the storage array. The method also includes converting the data in the first cache to a second data format distinct from the first data format and placing the data in the second data format into a second cache slot of the plurality of cache slots.

Abstract: One or more aspects of the present disclosure relate to performant destaging of write pending (WP) data to disk. In embodiments, an input/output (IO) workload is received at a storage array. Additionally, the IO workload can include an IO request with a random write request. Further, a write destage context for write-pending (WP) data corresponding to the random write request can be generated by a data services engine of the storage array. In addition, using the write destage context, a disk adapter (DA), at a backend of the storage array, is enabled to destage write-pending (WP) data without reading from a target write location of the random write request on a storage device on the storage array.

Abstract: An energy efficient heat pump for a heating, ventilation, and air conditioning (HVAC) system includes a vapor compression circuit, a first heat exchanger of the vapor compression circuit configured to place a working fluid in a first heat exchange relationship with a first air flow directed across the first heat exchanger, a second heat exchanger of the vapor compression circuit configured to place the working fluid in a second heat exchange relationship with a second air flow directed across the second heat exchanger, and a valve system of the vapor compression circuit.

Abstract: A latch assembly may include a guide base configured to fixedly couple to a circuit board and having a guiding feature, an axis configured to rotatably couple to the circuit board and having a driving feature, and a sliding latch including a guide feature configured to mechanically engage with the guiding feature to constrain movement of the sliding latch in a linear direction relative to the circuit board and a drive feature configured to mechanically engage with the driving feature such that in a first rotational position of the axis relative to the circuit board, the driving feature mechanically drives the sliding latch to a first position relative to a connector of the circuit board and in a second rotational position of the axis relative to the circuit board, the driving feature mechanically drives the sliding latch to a second position relative to the connector.

Abstract: One or more aspects of the present disclosure relate to distributing write destaging amongst a storage array's boards. In embodiments, an input/output (IO) workload is received at a storage array. In addition, a write IO request in the IO workload is directed to a target board of a plurality of boards of the storage array based on one or more performance-related hyperparameters of each board. Further, write data of the write IO request to a storage device is destaged by the target board.

Abstract: Emulation modules running on a single-board compute node have allocations of cores of a multi-core processor. The emulation modules are configured to donate underutilized cores or available CPU cycle units to a shared pool that can be used by other emulation modules running on the board. Emulation modules that require additional processing resources borrow cores or CPU cycle units from the shared pool. The emulation modules dynamically donate and retract cores or CPU cycle units from the shared pool based on utilization of allocated cores.

Abstract: In an aspect of the present disclosure, a bidirectional interaction providing device is provided. The device includes a real-time performance unit that transmits real-time performance information through a real-time performance information session to each user terminal participating in a performance channel related to the real-time performance; an interactive reception unit that receives interaction feedback from a first user terminal through an interaction transmission session; and an interaction transmission unit that transmits the interaction feedback to a destination of the interaction feedback by referring to information on the destination.

Abstract: A storage system is configured to accept subsequent versions of write data on a given track to multiple respective slots of shared global memory. A track index table presents metadata at the track level, and can hold up to N slots of data. All slots of shared global memory holding data owed to the source volume and to snapshots of the source volume are bound to the track in the track index table. Each time a write occurs on a track, the track index table is used to determine when a write pending slot for the track is owed to a snapshot copy of the storage volume. When a write pending slot contains data that is owed to a snapshot copy of the source volume, a new slot is allocated to the write IO and bound to the track in the track index table.

Abstract: An energy efficient heat pump for a heating, ventilation, and air conditioning (HVAC) system includes a vapor compression circuit, a heat exchanger of the vapor compression circuit configured to place a working fluid in a heat exchange relationship with an air flow directed across the heat exchanger, and a valve system of the vapor compression circuit. The valve system is adjustable between a first configuration and a second configuration, the heat pump is configured to operate in a cooling mode with the valve system in the first configuration and in a heating mode with the valve system in the second configuration, and the valve system is configured to direct the working fluid into the heat exchanger to place the working fluid in a counterflow heat transfer arrangement with the air flow in the first configuration and in the second configuration.

Abstract: A heterojunction bipolar transistor includes: a substrate; a base mesa disposed on the substrate, wherein the base mesa includes a collector layer and a base layer disposed on the collector layer, and wherein in a top view, the base layer includes a first edge and a second edge opposite to the first edge; an emitter layer disposed on the base layer; a base electrode disposed on the substrate and connected to the base layer; a dielectric layer disposed on the base electrode, wherein a first via hole is formed in the dielectric layer at the first edge of the base layer, and a second via hole is formed in the dielectric layer at the second edge of the base layer; and a conductive feature disposed on the dielectric layer, wherein the conductive feature is connected to the base electrode through the first via hole and the second via hole.

Abstract: A storage system is configured to accept subsequent versions of write data on a given track to multiple respective slots of shared global memory. A track index table presents metadata at the track level, and can hold up to N slots of data. All slots of shared global memory holding data owed to the source volume and to snapshots of the source volume are bound to the track in the track index table. Each time a write occurs on a track, the track index table is used to determine when a write pending slot for the track is owed to a snapshot copy of the storage volume. When a write pending slot contains data that is owed to a snapshot copy of the source volume, a new slot is allocated to the write IO and bound to the track in the track index table.