• Journal of Korea Multimedia Society
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• v.21 no.12
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• pp.1481-1492
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• 2018

Musculoskeletal disorders show symptoms of pain and dysfunction caused by accumulation of minute damage on nerves and blood vessels which are related to specific body parts. This is more likely to occur in the elderly. In Korea, 40.3% of the agricultural population is over 65 years old. In these cases, the portion of musculoskeletal disorders is more than 80% in acute/chronic diseases related to agricultural work. Therefore, measures for physical health care and safety prevention of elderly farmers are needed. In this study, we intend to propose a method to measure musculoskeletal health condition through the motion recognition device and VR contents. For this, we analyze the agricultural work causing musculoskeletal disorders of farmers, and suggest a motion analysis algorithm that can measure the health condition of the musculoskeletal system. In addition, we are going to propose a training method customized for farmers on the basis of VR contents in order to prevent musculoskeletal disorders.

• International conference on construction engineering and project management
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• 2022.06a
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• pp.1255-1255
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• 2022

Recently, research on digital twins to generate digital information and manage construction in real-time using advanced technology is being conducted actively. However, in the construction industry, it is difficult to optimize and apply digital technology in real-time due to the nature of the construction industry in which information is constantly fluctuating. In addition, inaccurate information on the topography of construction projects is a major challenge for earthmoving processes. In order to ultimately improve the cost-effectiveness of construction projects, both construction quality and productivity should be addressed through efficient construction information management in large-scale earthworks projects. Therefore, in this study, a 3D digital map-based AR site management work support system for higher efficiency and accuracy of site management was proposed by using unmanned aerial vehicles (UAV) in wide earthworks construction sites to generate point cloud data, building a 3D digital map through acquisition and analysis of on-site sensor-based information, and performing the visualization with AR at the site By utilizing the 3D digital map-based AR site management work support system proposed in this study, information is able to be provided quickly to field managers to enable an intuitive understanding of field conditions and immediate work processing, thereby reducing field management sluggishness and limitations of traditional information exchange systems. It is expected to contribute to the improvement of productivity by overcoming factors that decrease productivity in the construction industry and the improvement of work efficiency at construction sites.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.750-758
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• 2009

This study research the effect that the reality therapy program reduces the occupational stress in company employee. The subjects of this research were company employees aged 30 to 49 in the A area and they work more than 2 years in company. They were divided into two groups: an experimental group of 10 company employee, and a control groups of 10 company employee. and executed the program to the experiment group. A measurement tool was used a standard occupational stress scale for korean employee that developed by The Korean Society of Occupational Stress. For the purpose of the study, it was t-test to analyze collected data. The result of the study was that the occupational stress in an experiment group which take part in the reality therapy program was meaning statistically reduced than the control group by p<.001. In the subordinate measure of occupational stress, the occupational demand, organization system, requital inappropriateness score has a significant result by p<.01 and the occupational self-regulation, relation discord, and occupational insecurity score has a significant result by p<.05. In sum, the occupational stress score of treatment group which take part in the reality program reduce significantly than the scores of control group. Thus, the reality therapy program significantly effect to reduced the company employee's occupational stress.

• Journal of Korean Society for Quality Management
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• v.20 no.2
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• pp.118-128
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• 1992

The determination of appropriate buffer capacity is an important issue in the design of the advanced manufacturing systems and closely related to the system efficiency and flexibility. Work-in-process is usually not desirable. However, in reality, maintaining some capacity of buffer storage is inevitable in compensation for the machine blocking and break down. The objective of this paper is to present analytical methods and tools for the buffer capacity planning in the Flexible Manufacturing System Environments. The effects when machine blocking is critical factor are also discussed.

• Journal of Educational Research in Mathematics
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• v.12 no.2
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• pp.193-212
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• 2002

What is radical constructivism There were many questions arose related with radical constructivism in mathematics education. In this paper, the author put seven frequentlyasked questions on radical constructivism and described each question one by one in light with constructivists' point of views. The questions included types of constructivista, radical constructivism, trivial or weak constructivism, and social constructivism; representative people in radical constructivism; matter of ontological reality; evaluation of others' work; shared meaning; social influence; and teacher's roles from the perspectives of radical constructivism. The author added his opinions ell each Question.

• Journal of the Korean housing association
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• v.20 no.1
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• pp.113-122
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• 2009

In the work of contemporary spatialization, the meaning of program is being an important conceptual element beyond simple functional dimension. The design of this diagram allows to balance among changing programs, and it comes into the spotlight as a medium, which links the virtual to the reality as embodying the virtual, which is not embodied realistically, realistically through the design process. In other words, this method is attracting the public attention as a design tool which can concentrate on design process rather than a fixed tool. This study focuses on the role of balancing among mixed programs and the diagram as a design tool. Therefore, the purpose of this study is to analyze and research the work of spatialization, which apply to diagrams of contemporary designers, is to identify operating mechanism and then is to examine the characteristics and importance of them.

• Journal of the Korean Society of Safety
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• v.30 no.2
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• pp.35-40
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• 2015

It is a tendency for enterprises in the domestic construction field to harness the system scaffolding with an aim to securing safety, despite slight increase in terms of the construction cost. Nevertheless, given that putting the system into service in reality is not accurately surveyed by far and that safety standards and methods for safe work therewith are not yet established, hazardous factors involving the system scaffolding remain latent leaving unrecognized. In this regard, the current study attempts to understand the status of implementation and use of the system scaffolding in the local construction sites as for the year 2009 and the year 2013 through questionnaire surveying and in-depth interviewing, while further proposing, based on the result thereof, ways for activating introduction of the system scaffolding in an effective and systematic manner.

• Korean Journal of Computational Design and Engineering
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• v.4 no.1
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• pp.12-18
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• 1999

A deformable non-Uniform Rational B-Spline (NURBS) based volume is programed for the force reflecting exoskeleton haptic device. In this work, a direct free form deformation (DFFD) technique is applied for the realistic manipulation. In order to implement the real-time deformation, a nodal mapping technique is used to connect points on the virtual object with the NURBS volume. This geometric modeling technique is ideally incorporated with the force reflecting haptic device as a virtual interface. The results in this work introduce details for the complete set-up for the realistic virtual clay modeling task with force feedback. The force reflecting exoskeleton haptic manipulator, coupled with a supporting PUMA 560 manipulator and the virtual clay model are integrated with the graphics display, and results show that the force feedback from the realistic physically based virtual environment can greately enhance the sense of immersion.

• Korean Institute of Interior Design Journal
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• no.32
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• pp.13-20
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• 2002

This study is purposed to find fundamental characteristics in Grassi's architecture which has architectural principles in architecture itself and in the general frame of the historical facts of architecture. His architectural theories can be explained for rationality, historicity, universality. The method of architectural composition can be divided into urban morphological characteristic and compositional characteristic of architecture. The characteristics of the former are the reconstruction of the urban structure by the readjustment of an urban axis which is based on historical continuity of the city, the open court which is a passage transformed from colonnade that is the historical vernacular type and the respect for the city-line which goes with historical context. The characteristics of the latter are the use transformed of nine square which gives consideration to centrality and typology at the same time and the hierarchic division of the principal space and the subordinate space for the functional typical purpose. This analysis shows that Grassi's architecture is on the base of historical continuity and urban reality and for him architectural work is mental work which conflict with the real world for the reconstruction of the city.

• Safety and Health at Work
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• v.12 no.1
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• pp.28-34
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• 2021

Background: Safety management is required to ensure health and safety of personnel in Norwegian fish farming. However, few studies have addressed the status and practical relevance of this risk-reducing measure. Methods: This article provides new knowledge through interviews with 35 employees at different company levels, addressing perceptions of various safety management activities according to managers and operational personnel. Results: The interviews show that managers and operational personnel at fish farms agree that the quantity of measures aimed to improve safety has increased in recent years. However, some activities are perceived to have higher practical relevance than others. In general, measures that fit well with the practical reality are well received by the employees at the fish farms. Conclusion: Suggested improvements include involving operational personnel in the design of procedures, considering all risk dimensions that may affect occupational health and safety, and challenging the value of specific safety activities based on a detailed knowledge of the distinctive characteristics of work practice in fish farming.