• Journal of Biomedical Engineering Research
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• v.26 no.5
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• pp.309-317
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• 2005

It is expected that fully-implantable middle-ear hearing devices (FIMEHDs) will soon be available with the advantages of complete concealment, easy surgical implantation, and low power operation to resolve the problems of semi-implantable middle-ear hearing devices (SIMEHDs) such as discomfort of wearing an external device and replacement of battery. Over the last 3 years, a Korean research team at Kyungpook National University has developed an FIMEHD called ACRHS-1 based on a differential floating mass transducer (DFMT). The main research focus was functional improvement, the establishment of easy surgical procedures for implantation, miniaturization, and a low-power operation. Accordingly, this paper reviews the overall system architecture, functions, and experimental results for ACRHS-1 and its related accessories, including a wireless battery charger and remote controller.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.223-226
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• 2003

Devices of diversion gate used at irrigation canal, as a irrigation structures of agriculture, have shown serious problems such as corrosion, defect, inconvenience of operation, etc. Accordingly, handy devices of diversion gate have been developed and then tested in the laboratory. The operating types of the prototype were a rack-and-pinion type, an improved screw type that only gate plate was moved up and down while the screw axis was unmoved, and a remote control type which can be controlled from 50m away using a remote control system. Those 3 types were developed, and the improved screw type was shown the best operation through the laboratory tests.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1109-1112
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• 2003

Information technology has enabled mass standards calibration to be performed through internet. For this, an automatic weight handler was manufactured. During the operation the images of weight operation and the system are provided via the measurement system and a web server. The measurement system consists of a balance, a weight handler, instruments for environment measurement and a PC. The weight handler automatically loads and unloads weights on and from the weighing pan. The weight handler allows 6 series weights to be operated for weight calibration of 100-50-20-20-10-10 gram series weight. This capability could be used for "remote training" for series weight calibration.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.59-61
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• 2019

In unmanned lighthouse unmanned construction, it is necessary to establish a standardized system for efficient management and operation, and RTU standard protocols for condition monitoring and control are used to efficiently manage rotary lighters as the management system for the most important lighthouses. It is enacted to ensure the safety of maritime traffic through efficient management.

• Proceedings of the KIEE Conference
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• 2001.10a
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• pp.293-295
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• 2001

In this paper, a control algorithm of a stand-alone type photovoltaic/wind/diesel hybrid power system for operation in a remote island, is proposed in detail. Power controllers are used to combine two different power outputs of photovoltaic and wind-power generations into DC output, which is converted into AC power to meet load while charging the storage battery for later use. In the event that the whole power load cannot be met by photovoltaic and wind power only, power stored in the battery cell is supplied and if even this power run out, diesel generator will be applied. Certain portion of diesel power is used to cover the load and the other to charge the battery.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.564-567
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• 2005

For the application of monitoring system of the machine tool to industry, the requirements such as high reliability and low cost need to be satisfied. In this study, a reliable but inexpensive monitoring method for machine tool is introduced. To improve the monitoring reliability, several kinds of information related to machining and operation are selected; real-time video clip from USB camera, operation data and signal from CNC and feed motor torque. Especially, to improve the quality of real-time video clip, a camera housing is developed, it can significantly reduce the vibration effect and prevent from coolant and chip. The collected information are transferred to the monitoring terminals in remote sites using OPC and TCP/IP protocol over Ethernet, which give us convenience of development and interoperability.

• Korean Journal of Remote Sensing
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• v.12 no.2
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• pp.97-110
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• 1996

In this paper, we describe the structure, function, and the operation method of the high resolution CCD camera system on the KITSAT-3, which will be launched in 1998. We have developed the camera system with the University of Stellenbosch in the Republic of South Africa. Currently we are doing the environmental test for the engineering model of the camera system. The main purposes of the system are the technology acquisition and operation test. The around resolution of the system is 15 m at the 800 Km earth orbit.

• Korean Journal of Remote Sensing
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• v.19 no.3
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• pp.263-269
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• 2003

This research examined the capabilities of KOMPSAT-1 EOC images for the application of urban environment, including the urban changes of the study areas. This research is constructed in three stages: Firstly, for the application of change detection techniques, which utilizes multi-temporal remotely sensed data, the data normalization process is carried out. Secondly, the change detection method is applied for the systematic monitoring of land-use changes. Lastly, using the results of the previous stages, the land-use map is updated. Consequently, the patterns of land-use changes are monitored by the proposed scheme. In this research, using the multi-temporal KOMPSAT-1 EOC images and land-use maps, monitoring of urban growth was carried out with the application of land-use changes, and the potential and scope of the application of the EOC images were also examined.

• IEMEK Journal of Embedded Systems and Applications
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• v.17 no.2
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• pp.109-114
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• 2022

This paper proposes a 2D joystick and LoRa-based teleoperation system for the Ackermman steering mobile robot. The proposed joystick mapping algorithm reduces the linear speed of the robot when the joystick is steered in the direction of the maximum steering angle in the high-speed driving state of a mobile robot to reduce the risk of rollover. The LoRa-based remote operation system is designed for remote operation of mobile robots that require long range communication with relatively little data transmission and low power. The proposed system is implemented and the experimental results demonstrate the effectiveness of the teleoperation system with respect to the stability of communication strength and the robot motion.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.221-222
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• 2023

국제해사기구(IMO)는 자율운항선박(MASS)의 안전한 운항을 위해 해사안전위원회(MSC), 법률위원회(LEG) 및 해상교통간소화위원회(FAL)에서 협약규정식별작업(RSE)을 완료하고 각 위원회별로 MASS의 안전한 운항을 위한 조치방안에 대해 검토 중에 있다. RSE 결과를 반영하여 향후 MASS Code 개발과정에서 원격운항자(Remote Operator)가 중요한 검토사항이 될 것으로 식별됨에 따라 원격운항자가 갖추어야 할 최저역량에 대해 제시하였다. 또한 MASS Code 개발과정에서 논의될 운항모드(Mode of Operation)에서 원격운항자에게 필요한 역량에 대해서도 검토하였다.