• International Journal of Industrial Entomology and Biomaterials
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• 제12권2호
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• pp.75-80
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• 2006

Changes in the levels of protein and free amino acids in the haemolymph of three selected races of the silkworm, Bombyx mori viz., PM, $NB_4D_2$ and $CSR_2$, were investigated during 4th moult, 5th instar and pupal period. The levels of total protein in the haemolymph, increased from first day of 5th instar till sixth day. From seventh day till spinning, the protein levels decreased in all the three races. A sustained decrease in the haemolymph proteins was observed during the pupal development in all the three races. The levels of free amino acids, which were high during 4th moult, declined through the 5th age of larval development till spinning. PM showed a relatively higher free amino acid level (3.192 mg/ml) in haemolymph followed by $NB_4D_2$ (2.601 mg/ml) and $CSR_2$ (2.35 mg/ml). The free amino acid levels decreased gradually from prepupal stage but increased again at the end of pupal period. Racial differences in the changes in the levels of protein and free amino acids in the haemolymph were observed in the larvae and pupae when subjected to two high temperature regimes of $30^{\circ}C$ and $35^{\circ}C$. The results showed that high temperature induces specific changes in the metabolism (reversible thermal stress) that have different adaptive value in different races of the silkworm. Relatively higher increase in the free amino acid levels in the haemolymph of Pure Mysore presumably provides protective cover to tissues against high temperature by an increase in osmolarity and reduction in evaporative water loss. The absence of such a mechanism may be responsible for temperature susceptibility of the bivoltine races like $NB_4D_2$ and $CSR_2$.

• 한국안전학회지
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• 제36권5호
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• pp.1-9
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• 2021

With the convergence of the information and communication technologies, a new age of technological civilization has arrived. This is the age of intelligent revolution, known as the 4th industrial revolution. The 4th industrial revolution is based on technological innovations, such as robots, big data analysis, artificial intelligence, and unmanned transportation facilities. This revolution would interconnect all the people, things, and economy, and hence will lead to the expansion of the industry. A high-density, high-capacity energy technology is required to maintain this interconnection. As a next-generation energy source, lithium-ion batteries are in the spotlight today. However, lithium-ion batteries can cause thermal runaway and fire because of electrical, thermal, and mechanical abuse. In this study, thermal runaway was induced in 72.5 Ah NCM pouch-type lithium-ion batteries because of thermal abuse. The surface of the pouch-type lithium-ion batteries was heated by the hot plate heating method, and the effect of the rate of increase in the surface temperature on the thermal runaway trigger time was analyzed using Minitab 19, a statistical analysis program. The correlation analysis results confirmed that there existed a strong negative relationship between each variable, while the regression analysis demonstrated that the thermal runaway trigger time of lithium-ion batteries can be predicted from the rate of increase in their surface temperature.

• International Journal of Industrial Entomology and Biomaterials
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• 제14권1호
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• pp.45-50
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• 2007

Ethanol extract of 20 botanicals in 3 concentrations i.e., 2.5%, 5% and 10% were evaluated for their efficacy to improve reproductive performance of mulberry silkworm (Bombyx mod L.) through feeding botanical enriched mulberry leaves during $2^{nd}$ day of $4^{th}$ age as well as $1^{st}$ and $3^{rd}$ day of $5^{th}$ age larvae. The preliminary screening was done by ranking the botanicals based on influence in most important reproductive contributing parameters such as single cocoon weight, effective rate of rearing, pupation rate, fecundity and recovery of eggs/kg cocoon. Five botanicals viz., Asparagus recemosus, Achyranthes aspera, Tribulus terrestris, Withania somnifera, Parthenium histerophorus ranked first were further evaluated at 8% 5% and 3% concentrations to confirm their effectiveness and standardize effective concentration. Among the rearing parameters, mature larval weight, shell ratio and number of cocoons/kg were not significantly influenced by the treatments. However, reproductive parameters such as effective rate of rearing (wt), pupation rate (%), fecundity (No.) and egg recovery (g)/kg cocoon were significantly (P<0.05) influenced by the botanicals. Higher fecundity and egg recovery were obtained on treatment with Withania somnifera irrespective of concentrations. However at 5% concentration, pupation rate, fecundity as well as egg recovery were found significantly higher than that of other concentrations, confirming its effectiveness for improving reproductive efficiency.

• 한국게임학회 논문지
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• 제18권1호
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• pp.73-82
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• 2018

제 4차 산업혁명으로 일컬어지는 첨단기술 주도의 시대적 상황 속에서 게임 산업의 시장성은 지속적으로 확대되어 왔으며, 미래에 대한 전망이 밝다. 그러나 국내 게임 산업은 여전히 사회 문화적 이슈로 인하여 산업 활성화에 제약을 받고 있다. 이에 본 연구에서는 현재 국내 게임 산업이 마주하고 있는 사회 문화적 장벽수준을 파악하고자, 게임이용자에 대한 편견과 게임콘텐츠의 성 상품화에 대하여 살펴보았다. 연구결과, 응답자의 대부분이 여전히 남성 게임이용자 중심이었던 과거 게임시장의 편견에서 벗어나고 있지 못하였으며, 게임콘텐츠의 성 상품화가 게임 산업을 저해하는 요인으로서 이에 대한 규제가 필요하다고 응답하였다.

• Journal of Preventive Medicine and Public Health
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• 제5권1호
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• pp.25-35
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• 1972

From May 1st to November 30th, 1971, a study was conducted by authors on the health status of industrial workers through applying the modified Cornell Medical Index forwards a total of 4,565 labourers working in Busan City. The obtained results were as follows : 1. The largest number of industries and labourers was in Busanjin Gu, 9 and 2,386 (52.2%), respectively. 2. Total numbers of labourers subjected to the survey were 2,355 (51.6%) in male, 2,210(48.4%) in female. 3. By age and sex distribution, the largest was seen with the age group of 25-34, 1,260 in male, otherwise with under the age group of 24, 1,994 in female labourers. 4. The highest average number of complaints by section among all age groups and industries was as follows; In case of male labourers, textile was the highest with numbering 3.7 (35-39 age group) in the section of physical complaints, in the section of mental and total complaints, food industry was the highest with numbering 8.2 and 16.4, respectively, both under 19 age group, otherwise in case of female labourers, food industry was the highest with numbering 12.3 (physical), 10.3 (mental) and 22.7 (total complaints) with all in 20-24 age group. 5. The lowest average number of complaints by section among all age groups and industries was as follows; In case of male labourers, other industry was the lowest with numbering 0.4 (55 and over) in the physical, 0.3 (19 and under) in the mental and 0.7 (55 and over) in the section of total complaints, otherwise in case of female labourers, basic metal was the lowest in the all sections with all in 50-54 age groups.

• 한국산업보건학회지
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• 제31권4호
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• pp.484-493
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• 2021

Objectives: The purpose of this study is to understand and explain the meaning and nature of post-traumatic stress among industrially injured workers. Methods: In this study, Colaizzi's phenomenological research method and an in-depth interview were used, and data were collected from 8 industrially injured workers among adult men and women over the age of 20, those who are able to express their opinions, have experienced injuries due to industrial accidents, and those who have been injured for more than 6 months who had participated in the study from 1st May 2021 to 30th September. The in-depth interview with research participants took approximately 30 minutes to 90 minutes on average. Results: The research results were classified into five categories, eleven thematic collections, and 27 themes. The Five categories were 'maze with no exit', 'erased existence', 'impenetrable barrier', 'tightly closed iron gate', and 'overcoming reality hurdles'. Conclusions: This study can help understand and describe the experiences of post-traumatic stress among workers who have experienced industrial accidents by taking a phenomenological approach. It suggests the need for program intervention and institutional improvement for psychosocial rehabilitation as well as an institutional approach toward these targets.

• 산업기술연구
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• 제21권B호
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• pp.325-330
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• 2001

In this research, the early-age movements of joint at JPCP(Jointed Plain Concrete Pavement) were measured by field tests. The field tests were carried out for 5 days just after concrete placement, for 1 day after 52 and 72 days on Chung-Ang Expressway construction site in Dan-yang on the 28th and 29th of May 2001. The joint movements were measured by demec gauge and clip gauge. The results of regression analysis for the data measured during early 5 days showed that the joints of No.4, No.5, No.6, No.10, No.13, and No.15 could be considered as a moving joint. From data analysis on july 20, the joints of No.2, No.9, and No.10 showed the significant correlations from the minus value of coefficient of regression. As a result of regression data on August 8, joint movements occurred at all joints. Joint freezing and closure could be judged from the regression analysis using joint opening and total temperature measured at field tests.

• 한국직업건강간호학회지
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• 제10권1호
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• pp.66-73
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• 2001

In health promotion program, the fear of gaining weight is often given as a reason for giving up smoking cessation by the participants. The purpose of this study is to compare drinking habit, exercise and BMI distribution according to smoking habits. The subjects of this study were 83 industrial workers in Gu-mi. Data collection was conducted from Sep. 18th to Sep. 24th 2000. The method was self-reported questionnaire survey, consisted of general characterisics, smoking habits and its relevant questions. The results are as follows : 1. Fifty-nine percents of the subjects were currently smoking. 2. Smoking habits were significantly related with drinking(p=.049). More smokers(81.6%) reported drinking habit than non-smokers(61.7%). 3. Forty-one point two percents of the non-smoker and 34.7% of the smoker perceived their body type as "fat". 4. The mean values of BMI were 22.0 in smokers with 1-9 cigarettes/day, 24.2 in 10-19 cigarettes/day smokers and 24.0 in smokers with over 20 cigarettes/day. There are no statistically significant differences in BMI among smoking habits. 5. BMI among different smoking habit groups was not significant different in age, drinking habit, exercise, and smoking habit.

• 한국멀티미디어학회논문지
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• 제22권10호
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• pp.1208-1214
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• 2019

4th industrial age! 5G-based video content has changed rapidly. How do you view and understand VR/AR/MR/holograms in the age of convergent technology media represented by digital convergence in the 21st century beyond the modern visual system of Descartes? It predicts extension to an interactive visual system. This study proposes a methodology to visualize the Lacanian visual acuity after applying it to the L-System and to understand the visual system of the 21st century.

• 한국군사과학기술학회지
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• 제23권6호
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• pp.591-601
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• 2020

After North Korea's sixth nuclear test, the operational environment on the Korean Peninsula has fundamentally changed, and the South Korean military faces various security challenges, including a reduction in military service resources and shorter military service periods. In particular, the South Korean military is seeking a new paradigm in military construction amid changes in the defense acquisition environment linked to the push for defense reform 2.0 and the utilization of the fourth industrial revolution. Therefore, this study considered strategies for improving the operational test and evaluation of weapons systems suitable for changes in the defense acquisition environment to effectively prepare for existing military threats and future warfare patterns. For this purpose, external environment analysis and internal capabilities were diagnosed using PEST Analysis and SPRO Analysis, and improvement strategies were derived through SWOT analysis.