Abstract: The present invention relates to a medium cultivation system including: a cultivation bed in which plants are placed and which allows the plants to be cultivated by means of a nutrient solution; a nutrient solution tank in which the nutrient solution to be supplied to the cultivation bed is stored; and an apparatus for sterilizing a nutrient solution which sterilizes waste nutrient solution, discharged from the cultivation bed, for reuse or disposal or sterilizes the nutrient solution stored in the nutrient solution tank for supply to the cultivation bed, wherein the apparatus for sterilizing the nutrient solution is provided with a sterilizing unit, which sterilizes the nutrient solution to be sterilized, by supplying a sterilizing gas in the form of bubbles to the nutrient solution to be dissolved therein, and a sterilizing gas generator, which generates the sterilizing gas.

Abstract: Disclosed herein relates to a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and since the positive electrode contains a first positive electrode active material including an iron phosphate compound and a second positive electrode active material including a lithium composite metal oxide in a multi-layered positive electrode mixture layer, it is possible to display a large voltage deviation for each state of charge (SOC) of a secondary battery. Therefore, when applying a secondary battery, there is an advantage in that the state of charge (SOC) can be easily estimated and/or measured with high reliability.

Abstract: Disclosed herein relates to a lithium secondary battery, and the lithium secondary battery contains a ternary compound containing nickel (Ni), cobalt (Co), manganese (Mn), etc. as a positive electrode active material, and at the same time, contains a small amount of an iron phosphate compound and a silicon-based oxide in a positive electrode and a negative electrode, respectively, in the outermost part of a mixture layer adjacent to a separator, so not only has an excellent energy density of the battery, but also has a relatively low electrical conductivity of the positive electrode surface and the negative electrode surface, so that the amount of short circuit current during an internal short circuit of the secondary battery can be reduced, thereby having an advantage of improving the safety due to an internal short circuit of the secondary battery.

Abstract: A positive electrode for a lithium secondary battery includes a positive electrode current collector and a plurality of positive electrode mixture layers on the first electrode mixture layer. Each of the plurality of positive electrode mixture layers includes a first positive electrode active material comprising an iron phosphate compound, and a second positive electrode active material comprising a lithium composite metal oxide. A first positive electrode mixture layer of the n positive electrode mixture layers is in contact with the positive electrode current collector. A content ratio of the second positive active material in each of the n positive mixture layers decreases from the first positive electrode mixture layer to nth positive electrode mixture layer of the n positive electrode mixture layers.

Abstract: Disclosed herein relates to a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, and since the positive electrode contains a first positive electrode active material including an iron phosphate compound and a second positive electrode active material including a lithium composite metal oxide in a multi-layered positive electrode mixture layer, it is possible to display a large voltage deviation for each state of charge (SOC) of a secondary battery. Therefore, when applying a secondary battery, there is an advantage in that the state of charge (SOC) can be easily estimated and/or measured with high reliability.

Abstract: An apparatus for measuring radon and thoron using an ionization chamber is proposed. The apparatus includes: a pump for air inflow suctioning and sending external air to at least one channel; a first sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (?) particles discharged from radon and thoron; an air inflow delay module delaying air for a predetermined delay time and then outputting the air; a second sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (?) particles discharged from radon and thoron; and a control module discriminating normal or abnormal alpha particle detection signals, counting the normal alpha particle detection signals discriminated for a predetermined measurement time, and calculating radioactive ray concentration values on the basis of the counted number of times of the normal alpha particle detection signals.

Abstract: An elastic member according to an embodiment includes a first surface and a second surface opposite to the first surface and a first region and a second region, wherein a first direction in a length direction and a second direction in a width direction are defined, the first region is defined as a folding region, and the second region is defined as an unfolding region, a first pattern portion having an intaglio shape and a second pattern portion having an embossed shape are formed in the first region, the second pattern portion includes a plurality of first patterns and a plurality of second patterns that are spaced apart from each other, and a length of the first pattern extends in a second direction, and a length of the second pattern extends in the first direction.

Abstract: Disclosed herein relates to a positive electrode for a lithium secondary battery, wherein the positive electrode not only has an excellent energy density by containing a ternary compound containing nickel (Ni), cobalt (Co), manganese (Mn), etc. as a positive electrode active material, but also has an advantage of improving safety due to internal short circuit of a secondary battery by including an iron phosphate compound in the outermost part with respect to a positive electrode current collector.

Abstract: Methods are provided. A method includes announcing to a network meta information describing each of a plurality of distributed data sources. The method further includes propagating the meta information amongst routing elements in the network. The method also includes inserting into the network a description of distributed datasets that match a set of requirements of the analytics task. The method additionally includes delivering, by the routing elements, a copy of the analytics task to locations of respective ones of the plurality of distributed data sources that include the distributed datasets that match the set of requirements of the analytics task.

Abstract: A provenance method, system, and non-transitory computer readable medium for a plurality of eidetic systems having logs, include crawling the logs of each node of a plurality of nodes of the eidetic systems to cluster segments across the logs of temporally correlated events into clustered segments and analyzing the correlated segments to interleave an order of processes in the logs and assign a probability to the order of the processes occurring.

Abstract: Disclosed is a core for a current transformer, which forms an upper core in a round shape, and is disposed at a position lower than the center of a power line having both ends of the upper core received, thereby minimizing the stress of a magnetic path, and increases the permeability, thereby enhancing the magnetic induction efficiency. The disclosed core for the current transformer includes an upper core curved in a semi-circular shape to have a receiving groove formed therein, and having both ends extended downwards to be disposed to be spaced apart from each other and a lower core disposed on the lower portion of the upper core, and having both ends extended upwards to be disposed to face both ends of the upper core.

Abstract: Embodiments are disclosed for a method for a wearable secure data device. The method includes setting an operational mode for the wearable secure data device that stores a plurality of secure data items. The method also includes receiving a request for at least one of the secure data items from a client device that is communicating with a third-party device. Additionally, the method includes determining if the operational mode is associated with allowing access to the secure data items. Further, the method includes providing a response based on the determination.

Abstract: An elastic member according to an embodiment comprises a first area and a second area, wherein the first area is defined as a folding area and the second area is defined as an unfolding area, wherein the elastic member comprises: a first direction defined as a width direction of the elastic member; and a second direction defined as a length direction of the elastic member, wherein the first area comprises a 1-1 area close to a folding axis, and a 1-2 area that is further from the folding axis than the 1-1 area, wherein the first area comprises a first pattern portion extending in the first direction, the first area comprises a bridge portion extending the first pattern portion in the second direction, and the number of the bridge portion in the 1-1 area is 50% or less than the number of bridges in the 1-2 area in the first area.

Abstract: Disclosed is an apparatus and method for controlling power of a parallel multi pack system. The power control apparatus includes first to nth sensor units measuring operation characteristic values of first to nth battery packs connected in parallel; a power management unit controlling a power consumed in a load or a power provided by a charging device; and a multi pack management unit that: determines a pack resistance of each of the battery packs based on the operation characteristic value of each battery pack received from the sensor units, determines a minimum available power among available powers respectively corresponding to the pack resistances of the battery packs, determines a total power of the parallel multi pack system so the pack power of a battery pack having a lowest pack resistance becomes identical to the minimum available power, and transmit the determined total power to the power management unit.

Abstract: An elastic member according to an embodiment comprises: a first area; and a second area, the first area being defined as a folding area and the second area being defined as an unfolding area, wherein the elastic member comprises a first layer, a second layer on the first layer, and a third layer between the first layer and the second layer, the first layer comprises a metal, the second layer comprises a metal or plastic, the first layer comprises a plurality of pattern portions having a hole or groove shape, the third layer has a storage modulus of 29-150 kPa, and the third layer contacts the first layer with a first adhesive strength and contacts the second layer with a second adhesive strength, and the first adhesive strength and the second adhesive strength are 400-1800 gf/in.

Abstract: A system and method for efficient communication bus arbitration in a communication protocol are provided. The system and method for efficient communication bus arbitration are a system and method for slave communication bus arbitration in multi-drop communication, and provide efficient and fast communication speed by improving the packet structure in a manner in which a slave controller sequentially responds to a query of a master controller.

Abstract: A computer-implemented method, a computer program product, and a computer system for incremental and decentralized pruning of a machine learning model in federated learning. A federated learning system determines a serial sequence of participating in model pruning by agents in the federated learning system. A server in the federated learning system sends, to a first agent in the serial sequence, an initial model to trigger a federated pruning process for the machine learning model. The each of agents in the serial sequence prunes the machine learning model. The each of agents in the serial sequence generates an intermediately pruned model for an immediately next agent to prune. A final agent in the serial sequence prunes the machine learning model and generates a finally pruned model. The final agent sends the finally pruned model to the server.

Abstract: A training process of a machine learning model is executed at the edge node for a number of iterations to generate a model parameter based at least in part on a local dataset and a global model parameter. A resource parameter set indicative of resources available at the edge node is estimated. The model parameter and the resource parameter set are sent to a synchronization node. Updates to the global model parameter and the number of iterations are received from the synchronization node based at least in part on the model parameter and the resource parameter set of edge nodes. The training process of the machine learning model is repeated at the edge node to determine an update to the model parameter based at least in part on the local dataset and updates to the global model parameter and the number of iterations from the synchronization node.

Abstract: A data mining method, system, and non-transitory computer readable medium, include defining a set of filter constraints as a filter function for clustering users' private records of data of a private domain, selecting a subset of users' public records of data from a filtered set of data from a public domain that is common with the users' private records of data, and creating a data file including the matched user of the private domain to the public records of the user of the private domain, where the set of the filter constraints comprises a function that captures the subset of the users' public records of data who are of interest to the private domain, and only performs data mining with that set of information from the public domain.

Abstract: A mobile device for measuring radon in groundwater is proposed. The mobile device for measuring radon in groundwater has an effect in that the mobile device enables a user to achieve the same level of reliability as the conventional technology, a previously applied separate dehumidifying device is not required in measuring the radon concentration in groundwater, and while moving from site to site, the user is able to quickly measure the radon concentration in groundwater by the mobile device with a simple configuration and low cost.