Abstract: A material selection method using an optimized machine learning prediction model that learns the correlation between materials and environmental factors includes acquiring material properties, test conditions, and BRS noise data required for model training, generating a Gaussian process regression model using Bayesian optimization based on the training data, predicting an affective quality index for each dissimilar material using the model, and selecting an optimal material by synthesizing the indices. The optimal material may be selected based on predicting a BRS noise signal and an affective quality index value that may occur for each condition through a machine learning model, identifying the principle of BRS noise occurrence, and identifying the range of material properties and environmental factors in a training database according to the design criteria using a predicted value of the machine learning model.

Abstract: Proposed is a micropump. The micropump includes a head portion including a first and second movement guides and a first tip, and includes a body portion having at least a portion thereof accommodated in the head portion, the body portion including a core, a winding body, a first permanent magnet, a second permanent magnet, a first fixing guide, and a second fixing guide. The first movement guide and the first fixing guide are famed so as to correspond to each other, the second movement guide and the second fixing guide are formed so as to correspond to each other, a pole of the first permanent magnet faces or opposes a lower end contact surface of the core, and a facing direction of a pole of the second permanent magnet is same as a facing direction of the first permanent magnet.

Abstract: A stick-slip measurement apparatus includes: a friction test unit configured to provide variable friction conditions to test specimens; a measurement unit configured to acquire vibration and sound pressure data based on the friction conditions; and a data processing unit configured to convert the data transmitted from the measurement unit into a level value. The level value is a single feature value indicating a magnitude based on a signal processing technique. Additionally, the apparatus includes a display unit configured to display information converted using the level value converted by the data processing unit as a response curve equation graph. A vibration level value or a sound pressure level value for untested friction conditions is predicted using the response curve.

Abstract: An apparatus includes a velocity application unit configured to generate horizontal friction between a pair of test specimens, a load application unit configured to generate vertical friction between the pair of test specimens, and an impact application unit connected to the load application unit. The impact application unit is configured to regulate the distance between the pair of test specimens and to provide impact at a specific velocity. The apparatus also includes a measurement unit configured to measure the intensity of one or both of noise or vibration generated by friction and impact provided to the pair of test specimens. The apparatus additionally includes a controller configured to process noise and vibration data measured by the measurement unit.

Abstract: The solenoid valve includes a valve housing having a fluid flow path defined therein and having a fluid inlet and a fluid outlet fluid-communicating with the fluid flow path; a first magnetic portion received in the valve housing and having a partial annular shape having a hollow defined therein; a first coil portion received in the hollow of the first magnetic portion; a second magnetic portion received in the valve housing and having a partial annular shape having a hollow defined therein; a mover received in the valve housing and configured to perform a pivotal or translational motion under a magnetic force applied from the first magnetic portion or the second magnetic portion; and a permanent magnet received in the valve housing and disposed on the first coil portion so as to contact the first coil portion.

Abstract: The method for verifying the axial flux motor design variable includes: a first step of converting a cylindrical coordinate system design variable of the axial flux motor into an orthogonal coordinate system design variable; a second step of deriving a orthogonal coordinate system magnetic field from the orthogonal coordinate system design variable; a third step of deriving a cylindrical coordinate system magnetic field from the derived orthogonal coordinate system magnetic field; a fourth step of deriving one or more verification target physical quantities selected from a group consisting of magnetic flux linkage, counter electromotive force, inductance, and torque from the cylindrical coordinate system magnetic field; and a fifth step of comparing the verification target physical quantity with a predetermined reference value and determining whether a verification condition thereon is achieved, based on the comparing result.

Abstract: A linear motor design variable verification method and a linear motor design variable optimization method are disclosed. The linear motor design variable verification method includes a first step of deriving a magnetic permeability matrix of a linear motor from a linear motor design variable; a second step of deriving a Maxwell matrix of the linear motor from the magnetic permeability matrix of the linear motor via LU decomposition; a third step of deriving, from the Maxwell matrix of the linear motor, at least one verification target physical quantity selected from a group including a force of the linear motor, a magnetic flux linkage passing through each of coils of a stator of the linear motor, a counter electromotive force of the linear motor, and an inductance of the linear motor; and a fourth step of comparing the derived verification target physical quantity with a predetermined reference value, and determining whether a target verification condition is satisfied, based on the comparing result.

Abstract: Proposed is a micropump. The micropump includes a head portion including a first and second movement guides and a first tip, and includes a body portion having at least a portion thereof accommodated in the head portion, the body portion including a core, a winding body, a first permanent magnet, a second permanent magnet, a first fixing guide, and a second fixing guide. The first movement guide and the first fixing guide are famed so as to correspond to each other, the second movement guide and the second fixing guide are formed so as to correspond to each other, a pole of the first permanent magnet faces or opposes a lower end contact surface of the core, and a facing direction of a pole of the second permanent magnet is same as a facing direction of the first permanent magnet.

Abstract: On-platform pumps provide greater flexibility and design freedom and are a key feature of organs-on-chip platforms. On-platform electromagnetic (EM) pumps have been developed for use with the organ-on-chip platforms. The EM pump uses electrical energy, which may be supplied by a battery, making the pump portable. The EM pump uses an EM actuator having a low energy consumption. The actuator's low energy consumption is achieved by a latching design which requires only a short pulse of energy to switch its state and where springs store some of the actuator kinetic energy, which is then recovered in the reverse stroke. This further reduces the energy consumption of the actuator. Also provided are injection-molded, single-use platforms with onboard diaphragm micro-pumps and various valve and pump geometries. The EM actuators easily integrate with these platforms, demonstrating pumping at a constant flowrate, no measurable temperature rise, and valve sealing against varying back-pressure.

Abstract: The present invention relates to a liquid crystal alignment composition that not only exhibits high degree of imidization and excellent film strength when manufacturing a liquid crystal alignment film, but also can realize improved alignment property and electrical properties, a method for preparing a liquid crystal alignment film using the same, a liquid crystal alignment film and a liquid crystal display using the same.

Abstract: The present invention relates to a liquid crystal alignment composition for the preparation of a liquid crystal alignment film having enhanced alignment property and stability and exhibiting a high voltage holding ratio, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.

Abstract: The present invention relates to a liquid crystal alignment composition comprising first liquid crystal alignment polymer; second liquid crystal alignment polymer; and a cross-linking agent compound, a method for preparing a liquid crystal alignment film using the same, a liquid crystal alignment film and a liquid crystal display using the same.

Abstract: A liquid crystal aligning agent composition for preparing a liquid crystal alignment film having enhanced stability and exhibiting excellent electrical characteristics, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.

Abstract: A liquid crystal alignment film comprising a polymer, having an excellent alignment property, stability, and high film strength, and thus exhibiting excellent durability and a high residual image characteristic, and a liquid crystal display device using the liquid crystal alignment film.

Abstract: A liquid crystal aligning agent composition for forming a liquid crystal alignment film having improved electrical characteristics and high reliability while exhibiting excellent alignment properties and durability, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.

Abstract: The present invention relates to a liquid crystal alignment agent composition comprising degradable liquid crystal alignment polymer; and a catalyst precursor compound of a specific structure, a method for preparing a liquid crystal alignment film, a liquid crystal alignment film using the liquid crystal alignment agent composition and a liquid crystal display using the liquid crystal alignment film.

Abstract: Provided are a composition for a liquid crystal alignment agent, a manufacturing method of a liquid crystal alignment film, a liquid crystal alignment film using the same, and a liquid crystal display device including the liquid crystal alignment film. More specifically, there are provided the manufacturing method of a liquid crystal alignment film capable of providing the liquid crystal alignment film in which light irradiation energy is able to be reduced, and alignment characteristic and stability are excellent and the voltage holding ratio and electrical characteristics are also excellent through a simple process including applying and drying the composition for a liquid crystal alignment agent on the substrate, directly performing light irradiation to conduct alignment treatment while a high-temperature heat treatment process is omitted, followed by curing by heat treatment, the liquid crystal alignment film, and the liquid crystal display device including the same.

Abstract: A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.

Abstract: The present invention provides a liquid crystal aligning agent composition that has excellent storage stability, can secure a high imidization rate, and can produce a liquid crystal alignment film having improved film strength together with liquid crystal alignment properties, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.

Abstract: High force and low noise linear fine-tooth motors are described herein. Such motors can include armatures having fine teeth separated by narrow slots such that a ratio of a pitch between teeth and a pitch between permanent magnet poles is less than that of a conventional iron-core linear motor. In one embodiment, such a linear motor can include a first component having an armature including a plurality of iron cores surrounded by coil windings, and a second component having a plurality of permanent magnets with alternating polarity. The plurality of iron cores can be spaced apart from one another by an iron core pitch distance and the plurality of permanent magnets can be spaced apart from one another by a permanent magnet pole pitch distance, and a ratio of the iron core pitch to the magnetic pole pitch can be less than 1.33.