Abstract: An indoor positioning system and a method thereof using reflected light is proposed. The system and the method are configured to use an optical signal transmitter and receiver and a reflector array composed of retroreflectors whose angle of incidence of each optical signal is equal to an angle of reflection thereof to calculate a distance to the reflector array on the basis of reception information of each optical signal and calculate an absolute location of the user on the basis of the distance information and absolute location information of each reflective surface of the reflector array, so as to solve the problems of indoor positioning systems and methods using reflected light of the related art that has a limitation that reflective surfaces should reflect the reflected light at respective frequencies different from each other and sensors satisfying sufficient sensitivity distances and communication speeds to detect the reflected light are required.

Abstract: Disclosed are an ionic liquid, an electrolyte including the ionic liquid, and a lithium secondary battery including the same. The ionic liquid is capable of forming a film having high ionic conductivity on an anode upon reductive decomposition of cations contained therein, and delaying the decomposition of anions.

Abstract: Disclosed herein is a frame apparatus for an agricultural work vehicle. The frame apparatus includes: an engine frame configured to support the engine of an agricultural work vehicle; a front frame connected to each of a front work machine and the engine frame to support the front work machine mounted in front of the agricultural work vehicle; a center case spaced apart from the front frame based on a first axis direction, and disposed behind the engine frame; a rear axle case coupled to the rear of the center case; side frames each coupled to each of the front frame and the rear axle case on both sides of the agricultural work vehicle; and a crossbar coupled to the side frames while connecting the side frames on both sides based on a second axis direction perpendicular to the first axis direction.

Abstract: An encapsulating composition and an organic electronic device comprising the same, and the encapsulating composition which is capable of effectively blocking moisture or oxygen penetrating into the organic electronic device from the outside to secure the lifetime of the organic electronic device, implementing a top-emitting organic electronic device, being applied in an inkjet method, and providing a thin display.

Abstract: The present disclosure relates to a photocurable polysiloxane composition for 3D printing and a dental model including the same. In regard to the photocurable composition for 3D printing, including a novel polysiloxane compound according to one aspect, the cured product thereof exhibits excellent properties in terms of hardness, strength, elongation, coloring resistance against heat, coloring resistance against light, flexural properties, and biocompatibility, and thus the cured product is appropriate for use as a dental material. In addition, since the photocurable composition is liquid and thus the molecular weight and viscosity thereof is easily controllable, the photocurable composition is suitable for a 3D printing process.

Abstract: A turret punch includes a first body, a second body, a third body, a pin, a first resilient member, a turret, function members, a second resilient member and a connector. The second rail portion of the third body is linearly movable along the first rail portion of the first body. When operating the first and second bodies, the function member that is located corresponding to the first function end moves linearly so as to be engaged with or to be disengaged from the first function end of the first body, such that the holes are punched along a straight line.

Abstract: A turret punch includes a first body, a second body, a third body, a pin, a first resilient member, a turret, function members, a second resilient member and a connector. The second rail portion of the third body is linearly movable along the first rail portion of the first body. When operating the first and second bodies, the function member that is located corresponding to the first function end moves linearly so as to be engaged with or to be disengaged from the first function end of the first body, such that the holes are punched along a straight line.

Abstract: The present invention relates to a portable assembly type flat bench, and more particularly, to a portable assembly type flat bench in which a plurality of supports are spaced apart from each other by an equal spacing in the front and rear directions and left and right directions, and interconnected through a connection panel, to thereby reduce the volume of the bench and to thus enable easy carrying and storage, and easy assembly and disassembly, and to enable the size of the bench to be freely adjusted.

Abstract: The present invention discloses a woundable and unidirectional torque wrench which comprises a driving head, a first gearwheel, a second gearwheel, a woundable member, a resilient tube and a gripping member. The driving head includes a body, a rotating member, a pawl and a control structure. The first gearwheel is fixed to the rotating member. The second gearwheel is rotatably provided inside a pivot hole of the body and engages with the first gearwheel by teeth. One end of the woundable member can be driven by external force, and the other end is connected to the second gearwheel. The resilient tube accommodating the woundable member is connected to the body. The gripping member includes a bar member having two joint members provided at its two ends, and a third joint member couples with a connecting grip of the body.

Abstract: The present invention relates to a wire-tying tool having clutch mechanism which includes a housing unit, an active member, a passive member, a resilient member and a clamping gadget. The housing unit includes an outer tube and an inner tube. The outer tube and the inner tube can be mutually screw-thread-coupled, and make a relative stretch to each other. The active member and the passive member are positioned inside the housing unit on a movable and rotating status. One end of said active member has a first joint unit. Another end has a first disengagement face. One end of passive member has a second joint unit extending to the outside. Another end has a second disengagement face. When the first disengagement face closely contacts the second disengagement face, the active member and the passive member can make synchronic rotation. When the first disengagement face is apart from the second disengagement face, the active member and the passive member cannot make synchronic rotation.

Abstract: The present invention relates to a non-contact, non-destructive measuring apparatus that measures thickness profile and refractive index distribution of a single or multiple layers of thin films by means of the principle of reflectometry. According to the present invention, by employing more than one narrow band-pass optical filters and a two-dimensional array of CCD sensors, and by finding an optimal solution for the nonlinear functional relationship between the thickness of said thin film or thin films and the corresponding refractive indexes by using an iterative numerical computation method, said apparatus simultaneously measures local area-wise thickness profile and refractive index distribution among others of said a single layer or multiple layers of thin films on a substrate.

Abstract: A vertical alignment liquid crystalline compound containing a laterally substituted aromatic cyclic moiety. The liquid crystalline compound has a wide temperature range of the nematic phase, a high optical anisotropy and a high negative dielectric anisotropy. In addition, since the rotation viscosity and the K33/K11 ratio of the liquid crystalline compound are maintained at a low level, the liquid crystalline compound can be effectively used as a liquid crystalline medium having good image quality and a high response speed even when applied to thin liquid crystalline cells.

Abstract: A novel liquid crystalline compound having a negative dielectric anisotropy and a high optical anisotropy. Since the rotation viscosity and the elasticity coefficient (K11/K33) of the liquid crystalline compound are maintained at a low level, the liquid crystalline compound can be effectively used as a liquid crystalline medium having good image quality and high response speed even when applied to thin liquid crystalline cells.

Abstract: A centering punch includes a first body, a second body, a punching head, an elastic body, an elastic member, a push member, and a spring. Thus, the tapered portion of the punching head is moved along the tapered face of the first body, and the punching head is moved radially in the receiving chamber of the first body by guidance of the tapered face of the first body, so that the push portion of the push member is in alignment with the control hole of the punching head easily and exactly.

Abstract: The present invention relates to a non-contact, non-destructive measuring apparatus that measures thickness profile and refractive index distribution of a single or multiple layers of thin films by means of the principle of reflectometry. According to the present invention, by employing more than one narrow band-pass optical filters and a two-dimensional array of CCD sensors, and by finding an optimal solution for the nonlinear functional relationship between the thickness of said thin film or thin films and the corresponding refractive indexes by using an iterative numerical computation method, said apparatus simultaneously measures local area-wise thickness profile and refractive index distribution among others of said a single layer or multiple layers of thin films on a substrate.