• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.1004-1011
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• 1996

This paper covers the technology developmental stage work for the automatic ammunition loading system mainly focusing on the controller design of the electro-hydranlic type direct drive multi-axis manipulator. Mathematical model of the plant derived and PIDM servo-controller structured. Comparative study between the analytical and experimental work has been carried out to help understand the response property of the direct dine multi-axis robot. In the direct drive robot, non-negligible amount of disturbance and load Induced dynamics variation are transmitted to the drive axis and nonlinearity is highly observed. Thereupon a robust controller Implementing time-delay control law is proposed, and computer simulation confirms the possibility for the time-delay control application against the unpredictable disturbance and load-Induced dynamics variation.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.5 s.182
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• pp.93-102
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• 2006

This paper proposes a controller design analysis for three-axis CNC systems considering both contouring and tracking performance. The proposed analysis inclusively combines axial controllers for each individual feed drive system together with cross-coupling controller at the beginning design stage as an integrated manner. These two controllers used to be separately designed and analyzed since they have different control objectives. The proposed scheme includes a stability analysis for the overall control system and a performance analysis in terms of contouring and tracking accuracy. Computer simulation is performed and the results show the validity of the proposed methodology. Further, the results can be used as a basic guideline in systematic and comprehensive controller design for multi-axis CNC systems.

• IMMUNE NETWORK
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• v.20 no.1
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• pp.7.1-7.11
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• 2020

Cancer immunotherapy, in the form of vaccination, adoptive cellular transfer, or immune checkpoint inhibitors, has emerged as a promising practice within the field of oncology. However, despite the developing field's potential to revolutionize cancer treatment, the presence of immunotherapeutic-resistant tumor cells in many patients present a challenge and limitation to these immunotherapies. These cells not only indicate immunotherapeutic resistance, but also show multi-modal resistance to conventional therapies, abnormal metabolism, stemness, and metastasis. How can immunotherapeutic-resistant tumor cells render multi-malignant phenotypes? We reasoned that the immune-refractory phenotype could be associated with multi-malignant phenotypes and that these phenotypes are linked together by a factor that acts as the master regulator. In this review, we discussed the role of the embryonic transcription factor NANOG as a crucial master regulator we named "common factor" in multi-malignant phenotypes and presented strategies to overcome multi-malignancy in immunotherapeutic-resistant cancer by restraining the NANOG-mediated multi-malignant signaling axis. Strategies that blunt the NANOG axis could improve the clinical management of therapy-refractory cancer.

• Journal of architectural history
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• v.14 no.2 s.42
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• pp.41-55
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• 2005

Temple with Multi-Buddha's Pavilions is a temple consisting of more than 2 Buddha's Pavilions. Individual Buddha's Pavilions tend to form distinguished area, or to keep independent axis from other Buddha's Pavilions. This study is to understand the philosophy of layout of individual Buddha's Pavilions located in the Temple with Multi-Buddha's Pavilions. To investigate a relationship to layout of individual Buddha's Pavilions on the basis of Buddhism doctrine makes us to understand philosophies about temple layout which temple constructors had. Bulkooksa, a temple having several pavilions placed in parallel, integrates diverse philosophies such as Vairocana Buddha-Ksetra from Vairocana Buddha's Pavilion, Sakyamuni Buddha-Ksetra from both Sakyamuni Buddha's Pavilion and two stupa, and Amitayus Buddha-Ksetra (Sukhavati) from Amitayus Buddha-Ksetra Pavilion. Sakyamuni Buddha's Pavilion and Amitayus Buddha's Pavilion are placed east to west in parallel, and Vairocana Buddha's Pavilion is placed behind them. Beobjusa, a temple having several pavilions placed cross axis, combines three axes such as the first, main axis linking Kumkang Gate - Chunwang Gate - Palsang Pavilion - Amitayus Buddha's Pavilion - Sakyamuni Buddha's Pavilion, the second axis linking Palsang Pavilion -Maitreya Pavilion, and the third axis linking Amitayus Buddha's Pavilion - Avalokiteshvara Pavilion. Relationship among each Buddha's land is clearly expressed by means of this cross axis layout of Buddha's Pavilions, reflecting a philosophy of rebirth in Nirvana that Wonhyo and Eusang propagated. Buseoksa, a temple having several pavilions placed the before and the behind, combines three Buddha's lands such as Maitreya Buddha-Ksetra, Amitayus Buddha-Ksetra and Vairocana Buddha-Ksetra, by means of arrangement of Maitreya Pavilion, Anyang Pavilion and Amitayus Buddha's Pavilion at bended axis, and east facing Amitayus Buddha. By investigating the philosophy of Temple layout with Multi-Buddha's Pavilions in this study, Buddha's Land conception, for people, that ancient Korean temples have, is understood.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2674-2676
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• 2004

In this paper, web based monitoring systems are implemented for multi-axis force control systems of an intelligence robot. A web based monitoring system is implemented by porting Linux at embeded systems which include Xscale processors. A divice driver is developed to receive data from multy-axis force sensors in Linux operation systems. To control this device driver, a soket program for web browser is also developped.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.455-458
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• 2002

In recent years, precision positioning stage is demanded fur some industrial fields such as semi conductor lithography, ultra precision machining and fabricating of nano structure. In this research, precision multi-axis positioning stage, which consists of pzt actuator, flexure, and capacitance gauge, is designed and developed. The performance of it such as 3-axis positioning, characteristic of motion and resolution is verified.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.1
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• pp.9-14
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• 2015

To build a high precision machine tool and increase its productivity, structural analysis needs to be carried out for vibration and stiffness of the machine tools before any detailed design. Therefore, in this paper, static and dynamic analysis is carried out to evaluate 8-axis multi tasking machining beds for automotive power train shafts; then, selection of an appropriate device is made for application to bed design. The results of structural and modal analysis confirmed the structural characteristics of the 8-axis multi tasking machine for automotive power train shaft beds: and the second shape bed is the safest is considered secure.

• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.1
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• pp.1-9
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• 2004

In this paper, an efficient modeling method of Horizontal-Axis Wind Turbine(HAWT) system is proposed. This method Is based on representing a HAWT system as a multi-body system with several rigid bodies i.e. rotor blade, low/high speed shaft, gear system, md generator. Also, simulation software WINSIM is developed to evaluate performance of wind turbine system. Simulation results show that the proposed modeling method and simulation software are efficient and reliable.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.993-994
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.863-864
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• 2012