• 대한예방의학회:학술대회논문집
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• 1995.10a
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• pp.357-358
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• 1995

• Journal of architectural history
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• v.8 no.1 s.18
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• pp.9-28
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• 1999

Broadly speaking, this paper is concentrated on the trimming of the wood demanded for the palace, constructed in the 2nd half of the Choseon Dynasty. To be concrete, this is the study on the craftman and craftmanship corncerned with the trimming of the wood, its system, and terms of payment of his wages, Construction reports, financial reports, job slips, written estimates, bills for payment, and other documents in those days are examined for the study. Following conclusions have been reached through the study. 1) The operation system of whole construction office and its suboffice was very specialized and systematized from the early 19th century. 2) The craftman engaged in trimming of the wood was subdivided by work function. 3) The craftman for its first trimming, i.e. 'keojang' or 'seonjang' had been treated as a speacial labor recruited to the mid-l8th century, after that, was enrolled into the craftman. 4) A unit cost of its first trimming was firstly appropriated into the reconstruction of the Kyongwoon Palace in the early 20th century, and it was very subdivided for a personnel management. 5) Contract works were widely applied to all workers engaged in the reconstruction for an efficiency of the accomplishments.

• 보존과학연구
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• s.19
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• pp.133-158
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• 1998

There are about 2,000 species of termite in the World, but one species of termite inhabits in the southern part of Korean peninsula. Termites are social insects that live in colonies. The colonies are composed of king, queen, soldiers and workers. Termite food consists of cellulose obtained from wood. Protozoa in their digestive tracts convert the cellulose into usable food. Korean termite is a subspecies of Reticulitermes speratus Kolbe, Rhinotermitidae. It's subterranean termite and the scientic name is R. speratus kyushensis Morimoto. The subterranean termite must nest in the soil in order to survival, and infest soft-wood which contact with the soil near the nest. There are several ways which subterranean termite infestations can be noticed. Atcertain times of the year during daylight hours, king and queen termites emerge from the colonies. The propose of these flight is to establish new colonies. The termite is a decomposer of biological ecosystem, but an invader in the preservation of cultural properties as like wood buildings. There are serveral control methods for the prevention of wood building from termite's damages. Those are biological control, ecological control, physical control and chemical control. Ecological and Physical control are the best methods in the new constructing wood-building. Fumigation which is a method of chemical control, is the best method for the building damaged by the termite. After the fumigation, we have totake wood & soil treatments for the building and nearby in order not to be reinvaded by the termites.

• Journal of the Korean Wood Science and Technology
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• v.45 no.2
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• pp.159-167
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• 2017

Historical wooden buildings in Korea are being damaged by Reticulitermes speratus kyushuensis Morimoto, a type of subterranean termite, and the scale of this damage is increasing gradually because of global warming. This study evaluated the ingestion toxicity of the phenylpyrazole insecticide fipronil to R. s. kyushuensis and its applicability as termite bait with the aim of controlling termite colonies more efficiently. An ingestion toxicity assessment was conducted and the $LT_{50}$ was determined to be 4.43 day at concentrations of 10 ppm, indicating a slow-acting effect; therefore, 10 ppm was selected as an appropriate dose. A field applicability assessment was conducted in which the number of foraging workers and the rate at which the termites fed decreased 2 weeks after baiting, and termite colony activity was no longer apparent after 4 weeks demonstrating the efficacy of fipronil at eliminating colonies. Taken together, these results, indicate that low-dose fipronil eliminated R. s. kyushuensis colonies faster than insect growth regulators; therefore, it is expected to be useful when trying to conserve historical wooden buildings.

• Journal of the Korean Wood Science and Technology
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• v.47 no.5
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• pp.607-616
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• 2019

On account of the lack of education of Brazilian worker, this paper analyzed the characteristics of those professionals working in the production sector of timber houses. A sectoral survey was carried out with respective entrepreneurs to investigate the available professionals (career and contract types), evaluate the demands of skilled workers, and indicate solutions to improve the quality of labor qualification. Similarly, over 65% of sampled producers presented both direct-hired and outsourced workforce. For such contract ways, Civil Engineers and Architects were the main careers. Carpenters, Civil Engineers and Architects experienced on timber were the main sectoral demands. Timber Engineers have good potentials of service for this sector. The creation of courses on timber products can emerge as a key alternative to train people.

• Safety and Health at Work
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• v.9 no.1
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• pp.25-29
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• 2018

Background: The understanding of the relationship between risk perception, knowledge, and protective behaviors could play a major role in occupational risk control and management. Research exploring how workers perceive, recognize, and react to risks in different occupational settings is scarce in Thailand. The aim of this study was to assess the relationship of noise-related risk perceptions and knowledge to the use of hearing protective devices (HPDs) among sawmill workers in Thailand. Methods: Sawmill workers (n = 540) from four factories in Trang, Southern Thailand, participated in a questionnaire interview from December 2015 to January 2016. Descriptive statistics and linear regression models were used to explore the risk factors related to HPD use. Path diagram analysis was demonstrated and used to evaluate associations. Results: Risk perception was significantly correlated with HPD use (p < 0.01), HPD training (p = 0.01), and the number of years of work experience (p = 0.03). Sawmill workers were likely to use HPDs based on their risk perception and HPD training. However, HPD training was inversely correlated with age and the number of years of work experience. Conclusion: The study highlights the importance of risk perceptions and knowledge, and these factors should be emphasized in the design and implementation of any personal safety intervention program for sawmill workers.

• Journal of the Korea Safety Management & Science
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• v.10 no.2
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• pp.95-103
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• 2008

The package loading process of the lumbering industry is an operation that after a pair of workers bind three or six lumbers into one unit and cut both ends of the lumbers, transports the weight cargo of 30-50kg by one meter, pack and load at a height of 1.2 meters. This package loading process causes lots of noise and wood dust when workers carry out the heavy work as the above. Therefore we developed the monolithic both ends cutting package loading equipment in order to prevent from getting musculoskeletal disease. An loading bar working system of this equipment is improved from pneumatic pressure system to oil pressure system, furnished the newly designed flow dividers, and developed the new system that a both end array is loaded identically. Also we developed the safety equipment of loading bar in order to prevent workers mistake and overload from malfunction during the package loading process. The main cause of job evasion on working place could be solved by preventing the musculoskeletal disease and improving the working environments.

• Proceedings of the Safety Management and Science Conference
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• 2008.04a
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• pp.135-147
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• 2008

The package loading process of the lumbering industry is an operation that after a pair of workers bind three or six lumbers into one unit and cut both ends of the lumbers, transports the weight cargo of 30-50kg by one meter, pack and load at a height of 1.2 meters. This package loading process causes lots of noise and wood dust when workers carry out the heavy work as the above. Therefore we developed the monolithic both ends cutting package loading equipment in order to prevent from getting musculoskeletal disease. An loading bar working system of this equipment is improved from pneumatic pressure system to oil pressure system, furnished the newly designed flow dividers, and developed the new system that a both end array is loaded identically. Also we developed the safety equipment of loading bar in order to prevent workers mistake and overload from malfunction during the package loading process. The main cause of job evasion on working place could be solved by preventing the musculoskeletal disease and improving the working environments.

• Journal of the Semiconductor & Display Technology
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• v.21 no.2
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• pp.117-122
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• 2022

This paper proposes a method for evaluating the work of manufacturing workers using MediaPipe as a risk factor for musculoskeletal diseases. Recently, musculoskeletal disorders (MSDs) caused by repeated working attitudes in industrial sites have emerged as one of the biggest problems in the industrial health field while increasing public interest. The Korea Occupational Safety and Health Agency presents tools such as NIOSH Lifting Equations (NIOSH), OWAS (Ovako Working-posture Analysis System), Rapid Upper Limb Assessment (RULA), and Rapid Entertainment Assessment (REBA) as ways to quantitatively calculate the risk of musculoskeletal diseases that can occur due to workers' repeated working attitudes. To compensate for these shortcomings, the system proposed in this study obtains the position of the joint by estimating the posture of the worker using the posture estimation learning model of MediaPipe. The position of the joint is calculated using inverse kinetics to obtain an angle and substitute it into the REBA equation to calculate the load level of the working posture. The calculated result was compared to the expert's image-based REBA evaluation result, and if there was a result with a large error, feedback was conducted with the expert again.

• Korean journal of applied entomology
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• v.16 no.2 s.31
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• pp.105-113
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• 1977

In this paper have been examained the relation of tssk performance to body size. the variation of venation of males, sex ratio, breeding by forms of worker's pupae and structure by forms of workers's colony to nest size in polymorphism of polydomous red wood ant, Formica rufa truncicola var. yessoensis Forel in Korea. 1. The workers are classified into three forms, in which small form mainly performs itself the task of nursing in the nest and the visit to aphid from the outside of the nest, medium and large form mainly do not only the stinct of prey carrying from the outside of the nest and nest structure, but the task of protecting colony of outside. But the small forms visiting to aphid is not always fixed but seems to be changed with season. 2. The variation forms of venation of males are fourteen, generally, they have various variations of the discoidal. 3. Generally, sex ratio of Formica rufa truncicola var. yessoensis Forel is the same proportion, but it seems that there are some difference according to its characteristic of colony in each nest and polydomous colony structure in its habitat. 4. In summer season the medium form makes a colony in high proportion without any relations with the size of nest but. during hibernation, small form coasists in small nest, medium in medium nest and large in large nest. And so the structure of worker's colony by forms according to their nest size seems to be changed with season.