• Journal of Korean Society of Industrial and Systems Engineering
• /
• 제18권33호
• /
• pp.135-141
• /
• 1995

Hearing protection devices (HPDs) are currently the most common countermeasure against occupational noise-induced hearing loss. Use of HPD is only effective when they are properly Worn. However, industrial workers often do not very them, posing a serious under protection. This paper analyzes several motivational strategies which might be applied improve HPD use in the field. It was concluded that such methods could readily be implemented in the workplace to protect workers exposed to hazardous industrial noises.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.245-245
• /
• 2022

• Journal of Drive and Control
• /
• 제20권4호
• /
• pp.115-122
• /
• 2023

This study utilized a discrete element method (DEM) simulation, as one of the virtual field trials, to predict the impact of tillage depth on the rotary blade shaft during rotavator tilling. The virtual field for the simulation was generated according to soil properties observed in an actual field. Following the generation of particles for the virtual field, a sequence of calibration steps followed to align the mechanical properties more closely with those of real soil. Calibration was conducted with a focus on bulk density and shear torque, resulting in calibration errors of just 0.02% for bulk density and 0.52% for shear torque. The prediction of the load on a rotary tiller's blade shaft involved a three-pronged approach, considering shaft torque, draft force, and vertical force. In terms of shaft torque, the values exhibited significant increases of 42.34% and 36.91% for every 5-centimeter increment in tillage depth. Similarly, the vertical force saw substantial growth by 40.41% and 36.08% for every 5-centimeter increment. In contrast, the variation in draft force based on tillage depth was comparatively lower at 18.49% and 0.96%, indicating that the effect of tillage depth on draft force was less pronounced than its impact on shaft torque and vertical force. From a perspective of agricultural machinery research, this study provides valuable insights into the DEM soil modeling process, accounting for changes in soil properties with varying tillage depths. These findings are expected to be instrumental in future agricultural machinery design studies.

• JOURNAL OF ELECTRICAL WORLD
• /
• 2호통권158호
• /
• pp.14-17
• /
• 1990

• 월간산업보건
• /
• 통권62호
• /
• pp.46-46
• /
• 1993

• 대한공업교육학회지
• /
• 제45권2호
• /
• pp.108-130
• /
• 2020

In order to cope with the rapid changes in science and technology and various societies and complex economies with the advent of the 4th Industrial Revolution, intellectual property education is essential above all. In this study, therefore, intellectual property and the required competences were derived and verified for each field. As for the research method, Delphi technique was used twice for literature review and experts, and the conclusions of the research are as follows. First, the field of intellectual property required in the era of the 4th Industrial Revolution was classified, through literature review and Delphi technique, in eleven sections such as IP-R & D consulting, IP information search analysis, IP entitlement, IP strategic planning, IP transaction, IP finance, IP value evaluation, IP management, global IP management, IP commercialization, and IP disputes, of which validity was verified. Second, It was analyzed that the validity of required competencies derived from each field of intellectual property was reliable. Third, it is generally appropriate to nurture manpower in each field of intellectual property in universities or graduate schools. In addition, it is judged that regular job training of industries such as enterprises and public institutions is necessary regardless of the field.

• Convergence Security Journal
• /
• 제19권5호
• /
• pp.3-9
• /
• 2019

The importance of Industrial Security is continuously growing along with the rapid development of convergence technologies. Accordingly, it is expected for the gap between the supply and demand of industrial security professional personnel to grow every year. In order to reduce the supply and demand of industrial security, it is important to not only train professional qualifications but at the same time, secure a professional qualification acquisitor. In this regard, South Korea has introduced the Industrial Security Expert qualification as a non-governmental qualifications ince 2010. From 2017, promoted as nation-certified qualification and has supported activities as expert in industrials ecurity field. However, it is reality that Industrial Security Expert qualification has not yet to be recognized as professional qualification in the field of industry, have low rate of utilization as academic research is also shown the sign of stagnation. Based on these background, this research set goal in deducing a activation method for industrial security professional qualification concentrating on Industrial Security Expert qualification. The analysis on operation condition of Industrial Security Expert qualification and related precedent research was conducted and raised four types of activation method, which are organizational aspect, certification system improvement and operation aspect, certification acquisitors' utilization aspect and professionalism enhancement aspect.

• Journal of Fisheries and Marine Sciences Education
• /
• 제14권2호
• /
• pp.229-248
• /
• 2002

The primary objective of this study is to firstly survey and analyze the working environment and actual condition, secondly know their problems, and then provide the basic data about how to improve their working conditions. The specific study items for getting the goal above is as follows: 1. How does the industrial company connect with highschool vocational education well? 2. How does the mechanical technical highschool graduate apply with industrial field? The result of study is as follows: 1. In case of employment's information and the industrial educationed cooperation, the workers who has the working history in less than 5 years takes short to find the job. National high school graduates and those who get the job through the school and the teacher changed their job at short period compared to other. 2. There was no benefit about the same major's worker at industrial field. The workers admitted that there is the exemption fo military service and the certification's allowance, only for which is related to their job. The longer the workers stay their job, the more they had the chance to get the exemption of military service. National highschool were carried out the curriculum well as planed especially for their major subjects. Whereas, the public and private highschools weren't. The seniors of their job and the coworkers are very helpful for learning the actual knowledge. The workers said that the school's curriculum and club activity weren't effective applying with their working field. 3. The study says that the important things of their job is the knowledge of their major. Those who 80% answered that the worker must improve the knowledge of their major to be a good engineer. Learning from their senior in working field was very helpful. The question above was ranked as the first. 4. The answer says that the new changed job's pay is more than the previous job. That is, the reason of leaving the job is the pay gap. The most dissatisfaction and problems in present job was the environment of working and the working condition. 5. Regarding to asking next year's plan, the answer says that keeping the job was ranked as the first. That answer means that they conservative.

• Korean Journal of Soil Science and Fertilizer
• /
• 제50권5호
• /
• pp.472-481
• /
• 2017

Agricultural field near at the abandoned metal mine and industrial area has a high possibility to be polluted by heavy metals. However, concern about chemical properties including heavy metal concentration has been increased and biological properties such as soil respiration has been minimal in heavy metal polluted field. Therefore, main objective of this research was to evaluate soil respiration as an indicator of heavy metal pollution in agricultural field. Total of 60 sampling sites including each 30 sites of abandoned metal mine and industrial area were selected and heavy metal concentration, soil respiration, and chemical properties were measured. Results showed that heavy metal concentration in metal mine area was ranged Cu: $6.21~85.23mg\;kg^{-1}$, Pb: $23.84{\sim}1,044.72mg\;kg^{-1}$, As: $1.88{\sim}691.44mg\;kg^{-1}$, Zn: $18.72{\sim}527.55mg\;kg^{-1}$, Cd: $0.58{\sim}4.27mg\;kg^{-1}$, and Cu: $0.29{\sim}30.62mg\;kg^{-1}$, Pb: $4.41{\sim}19.77mg\;kg^{-1}$, As: $2.23{\sim}11.76mg\;kg^{-1}$, Zn $39.98{\sim}109.59mg\;kg^{-1}$, Cd $0.29{\sim}0.57mg\;kg^{-1}$ for industrial area respectively. While no sampling site was exceed the threshold value of each heavy metals in industrial field, metal mine area was highly polluted with Pb, As, Zn, and Cd. Soil respiration in the metal mine and industrial area was ranged $12.05{\sim}299.80mg\;O_2\;kg^{-1}$ and $27.68{\sim}330.94mg\;O_2\;kg^{-1}$, respectively. Correlation analysis between heavy metal concentration in soil and soil respiration showed that negative correlation was observed in metal mine area while no correlation was observed in industrial area. This result might indicate that as heavy metal concentration was increased, microbial activity in soil was decreased resulting decrease of soil respiration rate. Overall, soil respiration can be used as indicator of heavy metal pollution in soil and more biological properties need to be evaluated to better understand heavy metal pollution in soil.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• 제15권2호
• /
• pp.838-844
• /
• 2014

This study was carried out to measure and analyze impact of Jeju field citrus industry by FTA between China and Korea. Previous research has some limitation to find impacts of Jeju citrus industry according to effectuation of Korea-China FTA. In this study, Supply-Demand equilibrium model and 4 scenarios is specified to find more detail impacts of Jeju field citrus industry. According to the results, the decrement of total revenue of Jeju field citrus industry after 15 years from effectuation of Korea-China FTA will be about 440.7 billion Won.