• International Journal of Safety
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• v.1 no.1
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• pp.36-42
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• 2002

This paper is aimed at predicting the life of rubber insulating gloves under normal operating stresses from relatively rapid test performed at higher stresses. Specimens of rubber insulating gloves are subject to multiple stress conditions, i.e. combined electrical and thermal stresses. Two modes of electrical stress, step voltage stress and constant voltage stress are used in specimen aging. There are two types of test for electrical stress in this experiment: the one is Breakdown Voltage (BDV) test under step voltage stress and thermal stress and the other is lifetime test under constant voltage stress and temperature stress. The ac breakdown voltage defined as the break-down point of insulation that leakage current excesses a limit value, l0mA in this experiment, is determined. Because the very high variability of aging data requires the application of statistical model, Weibull distribution is used to represent the failure times as the straight line on Weibull probability paper. Weibull parameters are deter-mined by three statistical methods i.e. maximum likelihood method, graphical method and least squares method, which employ SAS package, Weibull probability paper and FORTRAN, respectively. Two chosen models for predicting the life under simultaneous electrical and thermal stresses are inverse power model and exponential model. And the constants of life equation for multistress aging are calculated using numerical method, such as Gauss Jordan method etc.. The completion of life equation enables to estimate the life at normal stress based on the data collected from accelerated aging test. Also the comparison of the calculated lifetimes between the inverse power model and the exponential model is carried out. And the lifetimes calculated by three statistical methods with lower voltage than test voltage are compared. The results obtained from the suggested experimental method are presented and discussed.

• Journal of Korean Society for Atmospheric Environment
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• v.34 no.3
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• pp.493-507
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• 2018

Due to high spatio-temporal variability of amount and optical/microphysical properties of atmospheric aerosols, satellite-based observations have been demanded for spatiotemporal monitoring the major aerosols. Observations of the heavy aerosol episodes and determination on the dominant aerosol types from a geostationary satellite can provide a chance to prepare in advance for harmful aerosol episodes as it can repeatedly monitor the temporal evolution. A new geostationary observation sensor, namely the Advanced Himawari Imager (AHI), onboard the Himawari-8 platform, has been observing high spatial and temporal images at sixteen wavelengths from 2016. Using observed spectral visible reflectance and infrared brightness temperature (BT), the algorithm to find major aerosol type such as volcanic ash (VA), desert dust (DD), polluted aerosol (PA), and clean aerosol (CA), was developed. RGB color composite image shows dusty, hazy, and cloudy area then it can be applied for comparing aerosol detection product (ADP). The CALIPSO level 2 vertical feature mask (VFM) data and MODIS level 2 aerosol product are used to be compared with the Himawari-8/AHI ADP. The VFM products can deliver nearly coincident dataset, but not many match-ups can be returned due to presence of clouds and very narrow swath. From the case study, the percent correct (PC) values acquired from this comparisons are 0.76 for DD, 0.99 for PA, 0.87 for CA, respectively. The MODIS L2 Aerosol products can deliver nearly coincident dataset with many collocated locations over ocean and land. Increased accuracy values were acquired in Asian region as POD=0.96 over land and 0.69 over ocean, which were comparable to full disc region as POD=0.93 over land and 0.48 over ocean. The Himawari-8/AHI ADP algorithm is going to be improved continuously as well as the validation efforts will be processed by comparing the larger number of collocation data with another satellite or ground based observation data.

• International Journal of Industrial Entomology and Biomaterials
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• v.31 no.2
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• pp.62-69
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• 2015

The Asian cavity-nesting honeybee, Apis cerana (Hymenoptera: Apidae), has been extensively studied for its biogeography and genetic diversity, but the molecules utilized in past studies were mainly ~90 bp long mitochondrial non-coding sequences, located between $tRNA^{Leu}$ and COII. Thus, additional molecular markers may enrich our understanding of the biogeography and genetic diversity of this valuable bee species. In this study, we reviewed the public genome database to find introns of cDNA sequences, with the assumption that these introns may have less evolutionary constraints. The six introns selected were subjected to preliminary tests. Thereafter, two introns, titled White gene and MRJP9 gene, were selected. Sequencing of 552 clones from 184 individual bees showed a total of 222 and 141 sequence types in the White gene and MRJP9 gene introns, respectively. The sequence divergence ranged from 0.6% to 7.9% and from 0.26% to 17.6% in the White gene and the MRJP9 introns, respectively, indicating higher sequence divergence in both introns. Analysis of population genetic diversity for 16 populations originating from Korea, China, Vietnam, and Thailand shows that nucleotide diversity (π) ranges from 0.003117 to 0.025837 and from 0.016541 to 0.052468 in the White gene and MRJP9 introns, respectively. The highest π was found in a Vietnamese population for both intron sequences, whereas the nine Korean populations showed moderate to low sequence divergence. Considering the variability and diversity, these intron sequences can be useful as non-mitochondrial DNA-based molecular markers for future studies of population genetics.

• Journal of Embryo Transfer
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• v.31 no.4
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• pp.349-353
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• 2016

This study was carried out to evaluate the influencing factors that affect the reproductive performance of cows at the Monirampur upazila in Jessore district of Bangladesh. A total of 224 cows were brought to the upazila livestock hospital for artificial insemination (AI). The cows were inseminated between 12 to 18 hours from the onset of estrus and data was obtained from the owner. Out of 224 cows, 133 became pregnant and 91 were non pregnant. In this study, the overall pregnancy rate was 59.29%. Among the age variability, the highest pregnancy rate (70.27%) was at the age of 4 years old. In case of breed variation, the highest pregnancy rate was observed in local breed (69.07%) compared with other crossbred cows. Hence the breed variations significantly influence the conception rate of cows. According to the parity, we found that the pregnancy rate was increasing with their parity but decreasing after 4th parity. The highest conception rate was observed in 3rd parity (67.74%) which was significantly higher than that of heifers (Parity-0). Here we also found that the types of bull semen used for AI had no significant effect for pregnancy rate. The skills of AI technician for AI to cows were significantly affecting the pregnancy rate. However, this study is not enough for rating and comment about the reproduction performance of cows. Therefore, further extensive study is needed for rating and recommendation for the cattle up gradation at that particular area.

• Journal of the Korean Society of Food Culture
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• v.33 no.4
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• pp.382-393
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• 2018

This study investigated Balgis (the record of the court)in the Joseon Dynasty pertaining to table settings for Sangsik (the meals for the dead). Sangsik are the records of daily meals for kings and key figures. In this study,14 pieces of Sangsikbalgi from 1890 to 1920, including two pieces from an unspecified period, were investigated to determine the composition and types of daily meals in the court. Meals consisted of a minimum of 10 dishes to a maximum 21 dishes, which basically included rice and soup. 'Jochi' was the term to refer to jjigae (stew) in the court. In Sangsikbalgi Bokgi, Gamjang, Jochi, Jjim, Suk, and Cho were all considered Jochi, which were recorded before Jeok or Jeon, where the side dishes were listed after rice and soup. This corresponded with the record of the royal tables in Wonhaeng-Ulmyo-Jeongri-Uigwe (圓行乙卯整理儀軌), in which Jochi included Jabjangjeon, Bokgi, Jabjang, and Cho. Whitebait and fruit, which are used as ingredients for Tang (soup) and Jeon, showed seasonal characteristics however, no other observed dishes showed seasonal variability. Additionally, beef and internal organs of animals were frequently used,regardless of seasons. When dishes in Sangsik were classified into basic dishes and additional cheop dishes (side dishes) based on Siuijeonseo (are recipe book of unknown authorship written in the late Joseon Dynasty), from five to nine Cheop dishes were set on the table, with seven being most common. Further comprehensive study needs to be conducted through undisclosed documents and private collections. Moreover, additional study of Judarye (anestral rites during the day for the royal) and cooking methods that were not investigated in detail in this study are needed.

• Korean Institute of Interior Design Journal
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• v.25 no.5
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• pp.55-62
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• 2016

This study was to research and study whether the types of interaction design perform the effective functions and roles as the exhibition space that audiences want centered in the digital media exhibition space. It was to suggest effective space characteristics through analyzing how the interaction design was expressed at the exhibition space and its application. For the analysis, it completes theoretical inquiry on the classification of the space characteristics according to the concept type of interaction and design characteristics. Based on it, it directly visited the exhibition space that reflected the interaction design centered in Seoul City, experienced the given experience, and designed the analyzing frame by composing a checklist after the observation research. Through the designed analysis, it performed a site questionnaire to audiences. It induced the conclusion as follows after analyzing the case space that reflected the interaction design type. First, the program analysis of the space that has the variability is necessary through a variety of digital analysis as there is a limitation that the characteristic of digital media has. Second, in the concept type of the interaction design, it needs the interaction stage among people that can communicate with audiences and stimulate their senses through vidual factors. Third, in the characteristic of the interaction design, it should try to use effective contents to get over the limitation of the space through the interaction in the designated space in case of exhibition. In the following research, it needs to study on the variety of stage plans in detail by supplying contents to audiences and grafting to the exhibition space continuously through using the interaction design that uses digital media at there.

• Journal of Korea Multimedia Society
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• v.12 no.2
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• pp.231-243
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• 2009

Currently interests of embedded software in various areas such as automotive field, ship field, robot field is increasing according to expand market of embedded systems. Various researches such as embedded operating systems, embedded software modeling technique, embedded software testing, and so on are going in progress. However systematic engineering approach in embedded system development is poor because embedded areas focus on hardware parts until now. Furthermore, framework-based de sign technique considering reusability is not reflected in embedded system development. Those development results in many of dead codes scattered in system, and results in poor reusability of system. This paper suggests a framework of embedded system for reusability and a static meta-model for reuse framework. Proposed meta-model expresses not only the structure of reuse framework, but also allows a designer to extend and design easily models of embedded system based on reuse framework according to various embedded system types.

• Journal of Korean Library and Information Science Society
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• v.46 no.1
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• pp.345-372
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• 2015

Most academic journals in the world today typically require submission of journal article titles in English. However, most authors and reviewers are insensitive to the fact that cultural differences at a national level exist in writing titles. In this paper, journal article titles that have been published in the United States and Korea were compared in order to find cross-national cultural characteristics in these titles. To conduct this study, sample titles in the field of social sciences were obtained from two bibliographic databases-Scopus and RISS. A frequency count on number of variables was used: length of title, types of titles and n-gram phrases. In addition, a variety of similarities and differences found from this study including the type of words and phrases that Korean authors tend to favor in journal articles. The results showed that there is a considerable amount of cultural related variability in the construction of journal article titles. This study suggests that cross national characteristics of journal article titles should be emphasized in the future.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.36 no.3
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• pp.239-246
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• 2003

We have examined the 16S-23S rRNA intergenic spacer region (ISR) of Vibrio vulnificus KCTC 2959. ISRs were amplified by primers complementary to conserved regions of 16S and 23S rRNA genes. ISR amplicons were cloned and sequenced. Analysis of the ISR sequences showed that V. vulnificus KCTC 2959 contains five types of polymorphic ISRs. Size of ISRs ranged from 424 to 741 bp in length and the number of tRNA genes ranged from one to four. The ISRs were designated as ISR-E $(tRNA^{Glu}),\;ISR-IA\;(tRNA^{Ile}-tRNA^{Ala})$, ISR-EKV $(tRNA^{Glu}-tRNA^{Lys}-tRNA^{Val})$, ISR-IAV $(tRNA^{Ile}-tRNA^{Ala}-tRNA^{val})$ and ISR-EKAV $(tRNA^{Glu}-tRNA^{Lys}-tRNA^{Ala}-tRNA^{Val})$ based on their tRNA genes. Multiple alignment of representative sequences from different Vibrio species revealed several domains of high sequence variability. We used the sequences of variable domains to design species-specific primer for detection PCR. Specificity of the primers was examined using genomic DNA prepared from 18 different Vibrio species. The results showed that the PCR using primers designed in this study can be used to detect V. vulnificus from other Vibrio species.

• The Journal of Fisheries Business Administration
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• v.50 no.4
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• pp.29-44
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• 2019

This paper examines the trend of restructuring and direction of management response in the Large Purse Seine Fishery. The large-scale fishing industry is one of the most popular fishing areas in the coastal area, and it has been developed by providing exclusive supplies of many types of catchy fish, such as mackerel and horse mackerel through physical productivity in fleet operations. However, the Large Purse Seine Fishery has been declining in profitability due to the deterioration of the business environment since 2000. It is at a crossroads whether it will disappear or regenerate as it is. The Large Purse Seine Fishery's current problems are: firstly, the continued deterioration of the fishery business balance and worsening labor problems, secondly, insufficient freshness management and quality control after landing, and thirdly, import competition. The fourth is the intensification of the market competition, which is the evolution of fishing variability and the increase in the proportion of small fish. The fifth is the reduction of the operating fishing ground due to the suspension of mutual fishing in Korea and Japan. To address these problems and suggest management response directions for the survival of large-scale fishing businesses is as follows. First, a sustainable production system should be established through strengthening resource management and promoting international fisheries cooperation. Second, the profitability of fishing management should be improved by introducing a low-cost supplier system and securing a stable labor force. Third, we should improve the leading and quality control of catch, improve the high value-added value of catch through brand development, and secure competitive advantage with imported produce. Finally, the government should establish a cooperative system among private sector, government, and research institutes to push ahead with these tasks and strengthen the competitiveness of the front and rear industries.