• 한국식품과학회지
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• 제27권6호
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• pp.915-920
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• 1995

This study was performed to investigate the effect of aluminum compound on the aluminum contents and histological change in brain tissue of rats. Seventy five male Sprague-Dawley strains were divided into five groups consisting of the control, 250 ppm $AlCl_3$ group, 500 ppm $AlCl_3$ group, 250 ppm $Al_2(SO_4)_3$ group, 500 ppm $Al_2(SO_4)_3$ group and kept on the diet for 2 weeks. The weight gain was increased by administration of $AlCl_3$ but decreased by administration of $Al_2(SO_4)_3$ as compared to control group. The aluminum contents in brain tissue of each group; 250 ppm $AlCl_3$ group, 500 ppm $AlCl_3$ group, 250 ppm $Al_2(SO_4)_3$ group and 500 ppm $Al_2(SO_4)_3$ group were 64.63, 102.21, 132.64 and 180.41 ppm, respectively. Aluminum accumulation in brain tissue was higher with administration of $Al_2(SO_4)_3$ than with administration of $AlCl_3$. In $AlCl_3$ administration group, multiple small intracytoplasmic granules and microvacuole were seen in large pyramidal cells of cortex and granulovacuolar degeneration. In $Al_2(SO_4)_3$ administration group revealed pollagis pallor, cellular pyknosis, microcavitation resulted from edema in deeper cortical layers were observed. Blue-pigmentation which represents the accumulation of aluminum was noted In granulovacuolar degeneration site in $Al_2(SO_4)_3$ administration group.

• Fisheries and Aquatic Sciences
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• 제5권3호
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• pp.165-171
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• 2002

This study was conducted to investigate the effects of dietary lipid sources on survival, growth anc body composition of snail (Semisu1cospira gottschei). Three replicate groups of snail (average weighing 152mg) were fed the diets containing different lipid sources such as lauric acid (LA), squid liver oil (SO), linseed oil (LO), corn oil (CO), SO+ LO, SO+CO, LO+CO and SO+LO+CO for 8 weeks. Survival was not affected by dietary lipid sources (p>0.05). Weight gain of snail fed the SO, SO+LO and SO+LO+CO diets was significantly higher than that of snail fed the LA and LO diets (P<0.05), and the lowest weight gain was observed in snail fed the LA diet (P<0.05). No significant difference was found in crude lipid content of edible portion in snail fed the different diets (P>0.005). Contents of 12:0, 18:2n­6, 18:3n-3 and 20:5n-3 from snail fed the LA, CO, LO and SO diets were higher than those from snail fed the other diets, respectively (p<0.05). The highest 22:6n-3 content was observed in snail fed the SO+ LO but was not significantly different from that of snail fed the SO, SO+CO and SO+LO+CO diets (p>0.05). The n-6 highly unsaturated fatty acids such as 20:4n-6 and 22:4n-6 contents of snail were not affected by dietary lipid sources (p>0.05). These results suggested that squid liver oil and mixture of squid liver oil and linseed and/or corn oil are good dietary lipid sources for the normal growth of snail. However lauric acid may not be a good lipid source for snail diet.

• International Journal of Internet, Broadcasting and Communication
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• 제14권3호
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• pp.292-298
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• 2022

Coding education and algorithm education are essential in the era of the fourth industrial revolution. Text-oriented algorithm textbooks are perceived as difficult by students who are new to coding and algorithms. There is a need to develop educational content so that students can easily understand the principles of complex algorithms. This paper has implemented basic sorting algorithms as augmented reality contents for students who are new to algorithm education. To make it easier to understand the concept and principles of sorting algorithms, sorting data was expressed as a 3D box and the comparison of values according to the algorithms and the movement of values were produced as augmented reality contents in the form of 3D animations. In order to help with the understanding of sorting algorithms in C language, the change of variable values and the exchange of data were shown as animations according to the execution order of the code and the flow of the loop. Students can conveniently use contents through a smart phone without special equipment by being produced in a marker-based manner. Interest and immersion, as well as understanding of classes of sorting algorithms can be increased through educational augmented reality-based educational contents.

• 디지털산업정보학회논문지
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• 제12권1호
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• pp.97-106
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• 2016

3D virual reality technique develop rapidly such as parts of education, health, national defense, etc. This paper implements an education contents utilizing 3D virtual reality based on HMD. In this paper, contents make up Changdeokgung Palace using to 3Dmax and Unity program, it shows on implemented Helmet Mounted Display. HMD obtain dynamic image from the target source of smart phone. Also, contents consist of service senerio through divided palace position and King's a day's journey especially. Above all, this paper indicate improving performance according to reduced cybersickness and immersion enlargement. And memory capacity reduced by various technique such that file type, compressed file, minimized resource. Proposed technique can obtain dynamic 3D image by HMD implementation at real time basis so that it is possible to use simultaneously multi-source. From the various and practical experiment, it is confirm that proposed 3D VR education system is useful for experience of virtual reality practically.

• 한국콘텐츠학회논문지
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• 제14권3호
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• pp.94-102
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• 2014

21세기에 들어 입체영상에 대한 대중의 관심을 다시 집중시킨 곳은 극장이었다. 2009년을 기점으로, 입체영상에 대한 관심은 폭발적으로 증가했지만, 콘텐츠 부재 문제는 여전히 해결되지 못했다. 그러나 TV 방송 시장에서의 전망이 불투명한 반면, 입체영화는 할리우드를 중심으로 꾸준히 제작되고 있다. 또한 탄탄한 스토리텔링을 갖춘 영화들은 흥행에서도 괄목할만한 성적을 기록했는데, 이들의 공통점은 입체영상이 주는 공간감이 내러티브 몰입을 효과적으로 보조하고 있다는 점이다. 따라서 입체영상 기술은 극장을 중심으로 내러티브 몰입을 강화할 수 있는 시각기술로서 유용할 것으로 전망한다. 그래서 본 연구에서는 몰입과 입체영상의 관계를 살펴보고, 그에 대한 논의를 바탕으로 내러티브 몰입을 효과적으로 보조할 수 있는 입체영상의 공간연출 프로세스를 제안하였다.

• 한국식품영양학회지
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• 제8권3호
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• pp.199-205
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• 1995

The study was carried out to compare the factors of overall preference In the sensory test to the analyzation of some compositions in the 7 kinds of old grasses : An Evening Primerose, a Spiderworts, the flower of a Convolvulus, So Ru Jang Yl, Shoe Bl Rum.O Yi Pul, Jip Sean Na Mul. Results were summaries as follows. 1. The Tannin contents of fresh sample and cooked samples were determined as 0.27~2.4g%, 0.25~1.439% respectively. The largest amount of fresh samples was contained In a Shoe Bi Rum. The smallest amount of them was in an Evening Primerose. The highest level of cooked samples was found in a Shoe Bi Rm, and the lowest was in the O Yi Pul. These results were similar to sensory test. 2. The free amino acid contents of 2 kinds of samples were determined as 25.15~179.5mg%, 1.86~13. 6mg% respectively. The largest amount of sweet taste of them was 0 Yi Pul and So Ru Jaeng Yl respectively. But So Ru Jaeng Yi is not appeared sweety becase this have much tannin. The smallest amount of sweet taste was a Spiderwort. The highest level of bitter taste was So Ru Jaeng Yl the and lowest was Jip Sean Na Mul. Among of them Jlp Sean Na Mul is similar to organoleptic test but So Ru Jaeng Yi is not strong bitter taste in sensory evaluation. The highest level of sour taste of cooked samples was So Ru Jaeng Yi and the lowest of them was Shoe Bi Rum. The reducing sugar contents of fresh sample and cooked samples were determined as 1.80~ 4.9g%, 1.84 ~3.579% respectively. The largest of fresh samples were So Ru Jaeng Yl and the lowest was Shoe Bi Rum. The highest of cooked samples were an Evening Primerose and the lowest was a Convolvulus. Among of these results an Evening Primerose was not similar to sensory test because it has much other components. The level of chlorophyll of fresh samples and cooked samples were determined as 11.7~39mg%, 11.3~40.3mg% respectively. The highest of fresh samples was Shoe Bl Rum and the lowest was J ip Sean Na Mul. The largest of cooked samples was So Ru Jaeng Yi and the lowest was a Jlp Seu Na Mul.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2015년도 춘계 종합학술대회 논문집
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• pp.321-322
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• 2015

현재 한국인 3명중 1명이 매일같이 접속하여 즐기는 국민 콘텐츠로 '웹툰'을 들 수 있다. 웹툰에 플래시를 활용하여 무빙카툰식의 절제된 애니메이션 타이밍 포즈를 연구하고 그 자체의 재미와 움직임의 재미를 더해 여러 콘텐츠에 활용할 수 있다고 본다.

• 한국환경농학회지
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• 제15권3호
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• pp.348-354
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• 1996

This study was carried out to investigate factors influencing on the groundwater quality at controlled horticulture in Honam area in 1995. The deeper groundwater sampling, the lower concentrations of $NH_4-N$ and $NO_3-N$ were observed. There was no difference in concentrations of $SO_4\;^{2-}$ and $Na^+$ in the groundwater below 15m. Contents of $NH_4-N$, $NO_3-N$ and $PO_4\;^{3-}$ in groundwater were the highest at rice transplanting season(the late May) and that of $SO_4\;^{2-}$, $Na^+$ and $Cl^-$ were the highest at dry season(the mid-February). Continuous cultivation of horticultural crops showed higher concentration of $NH_4-N$, $NO_3-N$, $PO_4\;^{3-}$, $Na^+$ and $Cl^-$ in groundwater than rotational culture with rice. The longer cultivation years with horticultural crops, the higher concentrations of $NO_3-N$, $PO_4\;^{3-}$, $SO_4\;^{2-}$ and $Cl^-$ were shown, and constitutional ratio of $NO_3-N$ among the anions increased gradually. Nitrate-N level, exceeded 20mg/l, the critical level for agricultural usage, frequently at Yongjinmyeon Wanju and Janglockdong Kwangju, and $PO_4\;^{3-}$ levels were higher at Seogtandong Iksan than the other places.

• Environmental Engineering Research
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• 제21권3호
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• pp.241-246
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• 2016

This paper discusses the influence of organic matter contained in aggregate on the emission characteristic of ammonia ($NH_3$) from cement mortar. $NH_3$ can be released to indoor-outdoor environment through diffusion in mortar (or concrete) and have resulted in the increasing air pollution, and especially well known as a harmful gas for the human body. The concentration of $NH_3$ released from cement concrete was then compared to the contents of organic matter contained in the aggregate. The result indicates that the contents of organic matter in the aggregate significantly differ with types of aggregate from different areas of production. The organic matter becomes organic nitrogen through the process of microbial breakdown for a certain period and pure ammonium ion ($NH_4{^+}$) is produced from the organic nitrogen. The $NH_4{^+}$ was reacted with alkaline elements in the cement and released as $NH_3$ from cement concrete through a volatile process. The released $NH_3$ was proportional to the contents of $NH_4{^+}$ adsorbed in the aggregate from different areas of production and the concentrations of $NH_3$ emission from cement mortar according to the aggregate differ by more than 4 times.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권6호
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• pp.628-646
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• 2009

Users want to browse and search various web contents with mobile devices which can be used anywhere and anytime without limitations, in the same manner as desktop. But mobile devices have limited resources compared to desktop in terms of computing performance, network bandwidth, screen size for full browsing, and etc, so there are many difficulties in providing support for mobile devices to fully use desktop-based web contents. Recently, mobile network bandwidth has been greatly improved, however, since mobile devices cannot provide the same environment as desktop, users still feel inconvenienced. To provide web contents optimized for each user device, there have been studies about analyzing code to extract blocks for adaptation to a mobile environment. But since web contents are divided into several items such as menu, login, news, shopping, etc, if the block dividing basis is limited only to code or segment size, it will be difficult for users to recognize and find the items they need. Also it is necessary to resolve interface issues, which are the biggest inconvenience for users browsing in a mobile environment. In this paper, we suggest a personalized adaptation system that extracts item blocks from desktop-based web contents based on user interests, layers them, and adapts them for users so they can see preferred contents first.