• Title/Summary/Keyword: lighting culture

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Effect of Light/dark Cycles on Wastewater Treatments by Microalgae

  • Lee, Kwangyong;Lee, Choul-Gyun
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.6 no.3
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    • pp.194-199
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    • 2001
  • Chlorella kessleri cultivated in artificial wastewater using diurnal illumination of 12h light/12h dark (L/D) cycles. The inoculum density was 10(sup)5 cells/mL and the irradiance in light cycle was 45$\mu$mol㎡s(sup)-1 at the culture surface. As a control culture, another set of flasks was cultivated under continuous illumination. Regardless of the illumination scheme, the total organic carbon (TOC) and chemical oxygen demand (COD) was reduced below 20% of the initial concentration within a day. However, cell concentration under the L/D lighting scheme was lower tan that under the continuous illuminating scheme. Thus the specific removal rate of organic carbon under L/D cycles was higher than that under continuous illumination. This result suggested that C. kessleri grew chemoorganotrophically in the dark periods. After 3 days, nitrate was reduced to 136.5 and 154.1mg NO$_3$-N/L from 168.1mg NO$_3$-N/L under continuous illumination and under diurnal cycles, respectively. These results indicate nitrate removal efficiency under continuous light was better than that under diurnal cycles. High-density algal cultures using optimized photobioreactors with diurnal cycles will save energy and improve organic carbon sources removal.

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Research and development of haptic simulator for Dental education using Virtual reality and User motion

  • Lee, Sang-Hyun
    • International Journal of Advanced Culture Technology
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    • v.6 no.4
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    • pp.52-57
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    • 2018
  • The purpose of this paper is to develop simulations that can be used for virtual education in dentistry. The virtual education to be developed will be developed with clinical training and actual case data of tooth extraction. This development goal is to allow dental students to learn the necessary surgical techniques at the point of their choice, not going into the operating room, away from time, space, and physical limits. I want to develop content using VR. Oculus Rift HMD, Optical Based Outside-in Tracking System, Oculus Touch Motion Controller, and Headset as Input / Output Device. In this configuration, the optimization method is applied convergent, and when the operation of the VR contents is performed, the content data is extracted from the interaction analysis formed in the VR engine, and the data is processed by the content algorithm. It also computes events and dental operations generated within the 3D engine programming and generates corresponding events through data processing according to the input signal. The visualization information is output to the HMD using the rendering information. In addition, the operating room environment was constructed by studying lighting and material for actual operating room environment. We applied the ratio of actual space to virtual space and the ratio between character and actual person to create a spatial composition at a similar rate to actual space.

Study on Space Design for Metaverse Fashion Show through Meta-Analysis of Literature (문헌 분석을 통한 메타버스 패션쇼 공간 디자인 연구)

  • Jin-Beom Pyeon;Yun-Seo Hong;Jung-Yi Kim
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.5
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    • pp.475-480
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    • 2023
  • As the digital fashion show developed through the pandemic period, this study analyzed the literature on the digital fashion show and presented basic data for the design of the metaverse fashion show space. Through keyword analysis, the flow of research was identified, and implications for space design for the metabus fashion show were derived through analysis of space, models and avatars, lighting, and communication. Through keyword analysis, it was possible to understand the conversion process of digital fashion show research in the pandemic situation. Metaverse fashion shows can express stages, avatars, and costumes that are impossible in the real world, but require design considering expressiveness. In the metaverse space, communication can be thought of as a designer's value delivery, digital marketing, and communication with customers.

A Study on the Strategy for Enhancing the Service Export linked with Manufacturing Sector : focused on Stage System and Special Lighting Service (제조-서비스 연계형 수출상품화 모델 개발전략 - 무대장치 및 특수조명서비스 수출산업을 중심으로 -)

  • Park, Moon-Suh
    • International Commerce and Information Review
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    • v.10 no.4
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    • pp.457-491
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    • 2008
  • As stage equipment export markets along with special lighting service lack the attraction for already globally established businesses, such markets can be viewed as an advantageous opportunity for SMEs as in general. In reality, global businesses tend to focus on large construction projects and this indicates relatively less substantial markets such as stage equipment and special lighting service export are more suitable for SME businesses. However, possible problems may be recognized as following; doubtful capabilities by such businesses to join in the vast and competitive global market and pursue manufacturing and service based export. This point is also supported by the fact that such in general SME businesses have substantially less experience in exporting products and services abroad. Realizing the distinctive features of the Korean economy, it is unarguable that every sector and area of global market must be regarded and monitored closely. Hence, it can be argued that there is an imminent need for establishment of supportive institution to assist export process of combination of stage equipments and special lighting service. This study emphasizes the need to improve export process of stage equipments, special lighting services as well as other related products and services which have been focused in domestic market only until now. Further, it also analyzed the potential prospect of such direction reconciling current crisis our manufacturing industry is facing. Even though it maybe regarded as one of the niche market for export of Korea in the short term view, stage equipment and special lighting service industry may rapidly grow as the global cultural industries have grown along with the increase of national income earnings overall. Due to such advantageous features, it can be expected that such industries will show strong growth in the near future. After analyzing the fact that Korea's plants (eg. powerplants) export sector is at its boom, there is a need to transform stage equipment and special lighting service export market into a primary market from a secondary(niche) market for SMEs. This study is viewed from the Korean economic and export sector aspect in the aim of seeking a solution to conquest our realistic limit in our export sector by developing a suitable export model. There have been cases of very few attempts to expand abroad by SMEs who have failed miserably due to their failure to adapt to foreign culture, practice and languages as well as substantial lack in experience in export marketing. Despite this, neglecting our manufacturing industry as it is which is showing its limit and problems is out of option therefore, it is imminent that we come up with an effective measure to address this problem and service export can be suggested as one of them. This study reveals manufacturing-service export model of stage equipment and special lighting service and its related areas is recognized as a field with a very strong future and furthermore, it is expected to bring synergy effects in manufacturing and services sector as well. Further, the operation strategy contains combination, composition and fusion(convergence) of manufacturing and service sectors which could derive various of export products which displays greater success probability or this export model. The outcome of this research is expected to become a useful source for enterprises related to such industry which are seeking a possible global expansion. Furthermore, it is also expected to become a catalyst which fastens the process of global expansion and not only that, we are firmly assured that this study will become an opportunity to improve our current policies and institutions related to this area's export market.

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Simultaneous Treatment of Carbon Dioxide and Ammonia by Microalgal Culture (조류배양을 통한 이산화탄소 및 암모니아의 동시처리)

  • ;;Bohumil Volesky
    • KSBB Journal
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    • v.14 no.3
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    • pp.328-336
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    • 1999
  • A green microalga, Chlorella vulgaris UTX 259, was cultivated in a bench-scale raceway pond. During the culture, 15%(v/v) $CO_2$ was supplied and industrial wastewater discharged from a steel-making plant was used as a culture medium. In a small scale culture bottle, the microalga grew up to 1.8 g $dm^{-3}$ of cell concentration and ammonia was completely removed from the wastewater with an yield coefficient of 25.7 g dry cell weight $g^{-1}\;NH_3-N$. During the bottle-culture, microalga was dominant over heterotrophic microorganisms in the culture medium. Therefore, the amount of carbon dioxide fixation could be estimated from the change of dry cell weight. In a semi-continuous operation of raceway pond with intermittent lighting (12 h light and 12 h dark), increase of dilution rate resulted in increase of the ammonia removal rate as well as the $CO_2$ fixation rate but the ammonia removal efficiency decreased. Ammonia was not completely removed from the medium (wastewater) of raceway pond which was operated in a batch mode under a light intensity up to 20 klux. The incomplete removal of ammonia was believed due to insufficient light supply. A mathematical model, capable of predicting experimental data, was developed in order to simulate the performance of the raceway pond under the light intensity of sun during a bright daytime. Simulation results showed that the rates of $CO_2$ fixation and ammonia removal could be enhanced by increasing light intensity. According to the simulation, 80 mg $dm^{-3}$ of ammonia in the medium could be completely removed if the light intensity was over 60 klux with a continuous lighting. Under the optimal operating condition determined by the simulation, the rates of carbon dioxide fixation and ammonia removal in the outdoor operation of raceway pond were estimated as high as $24.7 g m^{-2} day^{-1}$ and $0.52 g NH_3-N m^{-2} day^{-1}$, respectively.

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Using Ensemble Learning Algorithm and AI Facial Expression Recognition, Healing Service Tailored to User's Emotion (앙상블 학습 알고리즘과 인공지능 표정 인식 기술을 활용한 사용자 감정 맞춤 힐링 서비스)

  • Yang, seong-yeon;Hong, Dahye;Moon, Jaehyun
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.11a
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    • pp.818-820
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    • 2022
  • The keyword 'healing' is essential to the competitive society and culture of Koreans. In addition, as the time at home increases due to COVID-19, the demand for indoor healing services has increased. Therefore, this thesis analyzes the user's facial expression so that people can receive various 'customized' healing services indoors, and based on this, provides lighting, ASMR, video recommendation service, and facial expression recording service.The user's expression was analyzed by applying the ensemble algorithm to the expression prediction results of various CNN models after extracting only the face through object detection from the image taken by the user.

The Effects of the Transgenic Aspergillus oryzae Supplementation on Performance, Egg Quality and Intestinal Microflora of Layers (형질 전환 Aspergillus oryzae의 첨가가 산란계의 생산성, 계란 품질 및 장내 미생물 변화에 미치는 영향)

  • Jung, B.Y.;Park, S.W.;Paik, I.K.;Cho, K.J.;Lee, S.S.
    • Journal of Animal Science and Technology
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    • v.47 no.4
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    • pp.547-554
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    • 2005
  • An experiment was conducted to investigate the dietary effects of a transgenic Aspergillus oryzae(AO) culture on the performance, egg quality and intestinal microflora of layers. A total of 840 Hy-line Brown layers of 39wks old were assigned to one of the following 7 dietary treatments: control(C), C+0.2% AO culture, C+0.5% AO culture, C+0.2% transgenic AO culture, C+0.5% transgenic AO culture, C+0.2% transgenic mutant AO culture, and C+0.5% transgenic mutant AO culture. The transgenic AO was made by inserting Salmonella gallinarum gene to AO. And the transgenic mutant AO was made by inserting Salmonella gallinarum gene to mutant AO which was mutated by UV irradiation. Each treatment was replicated six times with 20 birds housed in 2 bird cage. Twenty birds units were arranged according to completely randomized block design. Feeding trial lasted for 8wks under 16 hour lighting regimen. Laying performance and egg quality were significantly(P<0.05) affected by the treatments. Transgenic AO culture supplementation at the level of 0.2% significantly increased egg production, while its egg weight was significantly decreased compared to that of the control. Feed intake and feed conversion ratio(FCR) were not significantly different among the AO treatments and the control. The eggshell strength of the AO treatments was significantly higher than that of the control. Transgenic mutant AO culture supplemented at the level of 0.5% significantly increased egg yolk color. Intestinal microflora were significantly(P<0.05) affected by the treatments. The cfu of Lactobacilli spp. significantly increased and those of Salmonella species and E. coli decreased in the AO treatments. The transgenic AO and transgenic mutant AO culture were more effective than the AO culture in reducing the cfu of Salmonella species and E. coli. It is concluded that supplementation of the transgenic AO culture at the level of 0.2% could be recommended for the improvement of egg production. Supplementation of transgenic AO or transgenic mutant AO culture at 0.2% level effectively controlled intestinal Salmonella species population.

A Study on Costume of Arctic Circles in Pacific Coast (태평양 연안 지역 북극권 복식 특성 연구)

  • 김문숙
    • The Research Journal of the Costume Culture
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    • v.7 no.3
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    • pp.35-49
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    • 1999
  • The North Pacific Arctic region has common factors such as climatic characteristics and similarity of animals inhabiting the region. But also there exists geographical barriers that separates the tribes, different languages between the tribes. Although there are such differences, the clothing and ornaments of the region have relatively similar design and style. And above all possess the ‘spirit’. The tribes find the motives of such ‘spirit’ in human, animal, and soul\`s adaptability to change and in grafting such changes of forms into clothing. Especially as means of pleasing the animal that they vitally rely on, the tribes made the clothing as beautiful as the nature itself and they tried to connect the humans and animals universally through such clothing that have social, artistic, and enchantic conditions. The supply of raw materials of animals has elevated the creativeness one step up and the precise knowledge about fur show their superior techniques in making fur clothing. The use of gutskin has is an excellent example of such knowledge, which is very unique of the region. The gutskin has moderate plasticity and thus can be cut into all sorts of pattern. It harmonizes the functionality and practicality. The worldwide fashion trend is dominated by Western style, but the clothing of this region is still keeping its distinctive folk identity. At the start of the research, Kayak and itelmen tribes of Asia, the tribes of Amur river and Aleut and Tlingit tribes of North America seems to be geographically too far from each other and therefore searching theoretical background for common cultural origins seems to be immoderate. But lighting the fact that geographical adjacency that can be perceived through costume cultural history, is the most important factor that gives mutual influences to costume culture between the neighboring tribes, cultural relative similarity of the costume is influenced by geographical location rather than physical distance between the tribes. Also humans\` adaptability to their environment is seriously contaminated with man-made products. This study on North Pacific Arctic region is telling us many things about our past, present and future.

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A Literature Review of on the Eumchungru in the Royal Palace of Joseon Dynasty (조선왕조 궁중음식(宮中飮食) 중 음청류(飮淸類)의 문헌적 고찰)

  • Oh, Soonduk
    • The Journal of the Convergence on Culture Technology
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    • v.3 no.2
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    • pp.1-13
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    • 2017
  • This article examines the types of Eumchungru as recorded in 16 royal palace studies of the Joseon dynasty (1392-1909). The types of Eumchungru during the Joseon dynasty appeared Hwachae(花菜), Sujunggwa(水正果), Isug(梨熟), Sumyeon(水麵), Sangseolgo(霜雪膏), Gareun-sujeonggwa(假蓮水正果), Hwamyeon (花麵), Cheongmyeon(淸麵), Semyeon(細麵), Saeng-isug(生梨熟), Osaeg-sudan(五色水團), Sudan(水團), Maeg-sudan(麥水團), Bogbunjago(覆盆子膏), Milsu(蜜水). The frequency of the Eumchungru types during the Joseon dynasty in order were; Hwachae(花菜) 26.4%, Sujunggwa(水正果) 20.7%, Isug(梨熟) 17%, Sumyeon(水麵) Sangseolgo(霜雪膏) each 5.6%, Gareun-sujeonggwa(假蓮水正果) Hwamyeon(花麵) Cheongmyeon(淸麵) each 3.8%, Semyeon(細麵) Saeng-isug(生梨熟) Osaeg-sudan(五色水團) Sudan(水團) Maeg-sudan(麥水團) Bogbunjago(覆盆子膏) Milsu(蜜水) each 1.9%. Through this study, through new lighting and menu development for hwachae used as a basis for hope to contribute to the globalization of Korean food.

A Literature Review of on the Sujeonggwa in the Royal Palace of Joseon Dynasty (조선왕조 궁중음식(宮中飮食) 중 수정과류(水正果類)의 문헌적 고찰)

  • Oh, Soonduk
    • The Journal of the Convergence on Culture Technology
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    • v.1 no.4
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    • pp.1-11
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    • 2015
  • This article examines the types of Sujeonggwa as recorded in 15 royal palace studies of the Joseon dynasty (1392-1909). The types of Sujeonggwa during the Joseon dynasty appeared Sujeonggwa(水正果), Geunsi-Sujeonggwa, Saengri-Sujeonggwa(生梨水正果), Weigamja-Sujeonggwa(倭柑子水正果), Gareun-Sujeonggwa(假蓮水正果), Yuja-Sujeonggwa(柚子水正果), Jabgwa-Sujeonggwa(雜果水正果), Duchung-Sujeonggwa (杜沖水正果), Yukyeldo-Sujeonggwa(六月桃水正果), Bokbunja-Sujeonggwa(覆盆子水正果), Aengdo-Sujeonggwa(櫻桃水正 果), Sansa-Sujeonggwa(山査水正果. The frequency of the Sujeonggwa types during the Joseon dynasty in order were; Geunsi-Sujeonggwa(20%), Saengri-Sujeonggwa(生梨水正果)r(15%), Sujeonggwa(水正果)(10%), Weigamja-Sujeonggwa(倭柑子水正果)(10%), Gareun-Sujeonggwa(假蓮水正果)(10%). The other Sujeonggwa each(5%). Through this study, through new lighting and menu development for Sujeonggwa used as a basis for hope to contribute to the globalization of Korean food.