摘要:
A router relays sensing data between a field network including at least one sensor node and a plant network including a management system. The routing apparatus manages a routing table in which a next address and an output interface corresponding to an extension destination address of 6 bytes and an input interface are stored and transmits sensing data to another field network or a management system using the routing table.
摘要:
Provided are a method and apparatus for controlling a shared memory, and a method of accessing the shared memory. The apparatus includes a processing unit configured to process an application program, a user program unit configured to execute a program written by a user based on the application program of the processing unit, a shared memory unit connected to each of the processing unit and the user program unit through a system bus and configured to store data interchanged between the processing unit and the user program unit, and a control unit configured to relay a control signal indicating whether the system bus, by which the data is interchanged between the processing unit and the user program unit, is occupied, and control connection of each of the processing unit and the user program unit with the system bus in response to the control signal. In the apparatus, the processing unit and the user program unit can easily interchange a large amount of messages through the shared memory unit having an abundant memory space.
摘要:
Provided are a method of mediating a plurality of radio frequency (RF) transceivers, which is performed in a sink node in order to perform multi-radio interfacing between the sink node and a plurality of sensor nodes in a wireless sensor network (WSN), and a direct memory access (DMA) based data transfer method.
摘要:
A low-power method for media access control on a semi-linear sensor network with multiple sensor nodes, includes: sensing a channel after waking up from a sleep mode by an arbitrary transmission sensor node that has obtained data; and generating a long preamble including a number of element preambles and sending to a destination sensor node after said channel sensing. This method further includes: sending said data to said destination sensor node after completion of transmission of said long preamble; and identifying duty cycle information of said destination sensor node after completion of transmission of said data and adjusting the number of said element preambles according to said duty cycle information.
摘要:
An IP packet forwarding server forwards an IP data packet between a user terminal and a machine-type communications (MTC) device allocated with a private internet protocol (IP). Such an IP packet forwarding server allocates a call identifier for connection between the user terminal and the MTC device, sets up a packet call to the MTC device and the user terminal using the call identifier, obtains packet forwarding information while setting up the packet call to the MTC device and the user terminal, and forwards an IP data packet between the MTC device and the user terminal using the packet forwarding information.
摘要:
An IP packet forwarding server forwards an IP data packet between a user terminal and a machine-type communications (MTC) device allocated with a private internet protocol (IP). Such an IP packet forwarding server allocates a call identifier for connection between the user terminal and the MTC device, sets up a packet call to the MTC device and the user terminal using the call identifier, obtains packet forwarding information while setting up the packet call to the MTC device and the user terminal, and forwards an IP data packet between the MTC device and the user terminal using the packet forwarding information.
摘要:
A dental retractor made of a shape memory material to be easily bended and restored to an initial shape under predetermined conditions is provided. The dental retractor includes a retraction portion made of nitinol or alloy including nitinol to be bendable and to have shape memory characteristics, and configured to hold gingival tissue by being supported by a tooth; a support portion connected to one side of the retraction portion to support the retraction portion; and a handle portion connected to the support part. Since the dental retractor is easily bent and variously deformed as necessary, convenience of a surgery may be increased. In addition, since the dental retractor is restored to the initial shape under the predetermined conditions after the surgery, convenience is increased.
摘要:
A dental ultrasonic tip for removing a post by continuously transmitting ultrasonic energy to the post through continuous contact with the post is provided. The dental ultrasonic tip for removing a post may include a tip body portion, and a post receiving portion integrally formed with a leading end of the tip body portion and configured to include a recess depressed into a predetermined space shape. When a post mounted in a root canal is to be removed, the post is inserted in the recess while coming into contact with an inner surface of the recess. According to the foregoing structure, ultrasonic energy may be continuously transmitted to the post and the post may be efficiently removed.
摘要:
The invention relates to a method for manufacturing an ultrasonic tip for an apicoectomy, such that the tip has a shape suitable for the shape of a tooth root, comprising the steps of: forming a feedstock by mixing a metal powder including stainless steel with a binder; injecting the feedstock to form an injection-molded part having a plurality of projections integrally formed on the surface thereof; performing debinding to remove the binder from the injection-molded part; sintering the injection-molded part; and performing annealing to increase the ductility and facilitate the bending of the sintered part.
摘要:
In a wireless sensor network system including at least one sensor network, when a network message received from a sensor node of a sensor network corresponds to a predetermined service, the wireless sensor network system forms a wireless local area network (WLAN) overlay network which is based on a WLAN system within a service area at which the sensor node is located. Data corresponding to the predetermined service is transmitted and received through the WLAN overlay network.