• Title/Summary/Keyword: NFT

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Effects of Nutrient Solution Composition and Cutting Size on Growth of Virus-free Sweet Potato Plant in Nutrient Film Technique (NFT 수경재배에서 양액 종류 및 삽수 크기가 고구마 바이러스 무병주 생육에 미치는 영향)

  • Yoo, Kyoung-Ran;Lee, Seung-Yeob;Bae, Jong-Hyang
    • Horticultural Science & Technology
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    • v.30 no.6
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    • pp.686-693
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    • 2012
  • To develop a technique for mass-propagation of virus-free sweet potato [Ipomoea batatas (L.) Lam.] plant using nutrient film technique (NFT), the growth characteristics of 4 cultivars as affected by nutrient solution composition and cutting size were investigated. 72 cells (35 mL/cell) plug trays filled with vermiculite and perlite (1:1, v/v) were used. Vine length, fresh and dry weights of virus-free plants were the greatest in the nutrient solution recommended by National Horticultural Research Station in Japan, followed by that recommended by National Institute of Horticultural & Herbal Science in Korea, and Yamazaki's nutrient solution for lettuce. The growth of uppershoot cuttings was the best among 4 subsections of cutting. Vine length, and fresh and dry weights increased in the longer cutting treatments, and were better in 'Shinzami' and 'Yeonhwangmi' than those in 'Mannami' and 'Shincheonmi'. Vine diameter and length of the longest root were not significantly affected by the cutting size and cutting source. The growth characteristics of the single node cutting were not significantly different from those in 2-node cutting. The efficiency of rapid mass-propagation could be promoted with single node cuttings and uppershoot cuttings grown in NFT system.

Effects of Diurnal Alternation of Nutrient Solution Salinity on Growth and Fruit Quality of Tomatoes Hydroponically Grown in NFT System (NFT 수경재배시스템에서 주/야 양액농도변환이 토마토의 생육 및 품질에 미치는 영향)

  • Kim Ki-Deog;Lee Eung-Ho;Lee Jae-Wook;Lee Byoung-Yil;Son Jung-Eek;Chun Chang-Hoo
    • Journal of Bio-Environment Control
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    • v.15 no.1
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    • pp.53-68
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    • 2006
  • This experiment was conducted to investigate the effects of diurnal alternation of nutrient solution salinity on growth and fruit quality of tomatoes (Lycoperisicon esculentum cv. 'House momotaro') hydroponically grown in root intercept bag-NFT (RIB-NFT) system. Plant height was the lowest in the high concentration during daytime (6/1 $dS\;m^{-1}$, day/night). Yield was very high in the concentration of 1/1 $dS\;m^{-1}$, it decreased with increasing the concentration of nutrient Yield was higher at low concentration (4/1 $dS\;m^{-1}$) at nighttime compared to the same concentration (4/4 $dS m^{-1}$) at daytime and nighttime, and the reverse (1/4 $dS\;m^{-1}$) was similar to the control (perlite culture). Yield was greatly reduced by higher concentration at daytime than nighttime, and the decrease was alleviated by lower concentration at nighttime. With increasing the concentration of nutrient solution during daytime, sugar content of tomato fruit was increased, but yield was decreased. In the other experiment, tomato plants were hydropoically cultured in NFT system diurnally alternated between Aichi's solution and $Ca(NO_3)_2$ solution. $Ca(NO_3)_2$ solution was supplied for 4 hours from 10:00 to 14:00 at daytime and from 22:00 to 2:00 at nighttime, respectively, and Aichi's solution was supplied for the time except the 4 hours. Ca content of leaves and sugar content of fruit were increased by supplying $Ca(NO_3)_2$ solution at daytime compared to nighttime, but plant growth was greatly suppressed by supplying $Ca(NO_3)_2$ solution with the concentration of 4 $dS\;m^{-1}(4/4^{Ca}\;dS\;m^{-1})$ at nighttime.

Studies on the Water Consumption and Growth of Vegetables Cultivated by Hydroponics in' the Green House (시설채소의 수경재배방법별 소비수량과 생육에 관한 연구)

  • 김시원;이경희;김유현;김선주;임창영
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.31 no.1
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    • pp.31-44
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    • 1989
  • In the vinyl house cultivation, the water consumption, evapotnanspirafion ratio, growth condifion by the growing stages and yields of tomato and cucumber were investigated when they cultivated by nutriculture, rice hull charcoal culture and NFF culture. The results obtained are summarized as follows: 1. The mean air temperature in the vinyl house during the experimental perica j was 1.9$^{\circ}$C higher than the outdoor air temperature, the rrnocirnum and minimum air temperature in the vinyl house was 4.6C and 1.7$^{\circ}$C higher than the outdoor temperature, respectively, and the mean daily evaporation in the vinyl house during the experimental period was 4.3rnm that is 02rnrn more than the outdoor evaporation 2. In the tomato cultivation, the growth of rice hull charcoal culture was the best among the three methods, and the growth of NFT culture and nutriculture were worse than the soil cultivation which is standard, and among the nutriculture, the growth of EC 1.3m.mho plot was the best. 3. In the cucumber cultivation, the growth of rice hull charcoal culture was the best, and while the growth condition of NFT culture was worse than the standard soil cultivation, the growth of nutriculture was better than the standard soil cultivation, and the growth of EC 1.3m.mho plot was the highest among the different treatments in the nutriculture. 4. In the tomato cultivation, the total water consumption of rice hull charcoal culture plot was 1107.5rnm which is the highest amount among the three methods, and in the nutriculture, the total water consumption of EC 1.3m.mho plot was 22lAmm which is the highest among the three different treatments. 5. In the cucumber cultivation, the total water consumption of rice hull charcoal culture was 11762rnm which is the highest, and the total water consumption of EC 1.3m.mho plot was 284.9rnm which is more than the 278.9mm of EC 1.Smmho plot and 262.9mm of EC 1.7rnmho plot. 6. The crop coefficient(Kc) of tomato was 0.82 in NFT culture, 4.67 in rice hull charcoar culture and 0.86~0.91 in nutriculture. 7. The crop coefficient(Kc) of cucumber was higher than tomato as 1.13 in NFT culture, 520 in rice hull charcoal culture and 1.08~1.19 in nutriculture. 8. The evapotranspiration ratio in the mid and late season were higher than the beginning and elongation stage, and the average evaportranspiration ratio of tomato and cucumber was 3.81 and 424, respectively, in the rice hull charcoal culture plot. 9. In the tomato cultivation, the total yield per plant of rice bull charcoal culture was 1443.Og which is the highest, and in the nutriculture, their yields were worse because of the damage of downy nidew disease. 10. In the cucumber cultivation, the total yield per plant of rice hull charcoal culture was 1965.7g which is the highest, and while the yield of NFT culture was ahout 25% lower than the stadard soil cultivation, the yield of nutriculture was higher than the standard soil cultivation, and among the treatments in the nutriculture, the yield of EC 1.3m.mho plot was the highest.

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Development of an Aeroponics-NFT(Nutrient Film Technique) Nutriculture System Using Microcomputer for Greenhouse Melon (마이크로컴퓨터를 이용한 온실멜론의 분무경 -박막순환식 양액재배 시스템 개발)

  • 유수남;서상룡;정종훈
    • Journal of Biosystems Engineering
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    • v.23 no.2
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    • pp.167-178
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    • 1998
  • An Aero-NFT nutriculture system using microcomputer for cultivation of greenhouse melon was developed and the performance of the system was evaluated through experiments. The system could control temperature, EC and pH of the nutrient solution within the error ranges of $\pm$ 0.2$^{\circ}C$, $\pm$ 0.2 mS/cm, $\pm$ 0.1 pH, respectively. The results of cultivation experiment showed that temperature, EC and pH of the nutrient solution were generally controlled within the setting ranges during cultivation period. The growth results were good until pinching, but the fruit quality of melons was not high except sweetness and shape. To optimize performance of the system, more techlical information for nutriculture of greenhouse melon was needed.

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Web 3.0 Reboot: Issues and Prospects (웹 3.0의 재부상: 이슈 및 전망)

  • Park, J.R.;Choi, S.S.
    • Electronics and Telecommunications Trends
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    • v.37 no.2
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    • pp.73-82
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    • 2022
  • Web 3.0 is a new web paradigm that aims to overcome the excessive commercialism and influence of big tech companies. Web 3.0 can be defined as a user-centered decentralized Internet environment, and Web 3.0 is a mixture of various terms and technologies such as blockchain, cryptocurrency, NFT, artificial intelligence, and metaverse. When new technology fields emerge, it is common to have positive and negative evaluations. As a result, rather than deciding which position is correct, it is necessary to investigate the causes and directions of change and prepare to seize the opportunity. In light of this, the present study examines the change in the web paradigm and the context of the emergence of Web 3.0, investigates the characteristics and major cases of Web 3.0, and discusses future issues and prospects.

CMTO: An Inquiry into the Activation for Real Estate Security Token of the Digital Asset Hour (CMTO: 디지털 자산 시대의 부동산 토큰 증권 활성화 방안 연구)

  • Jeongmin Lee;Minhyuk Lee
    • Journal of Information Technology Services
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    • v.22 no.4
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    • pp.81-95
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    • 2023
  • The emergence of Security Token has revolutionized the way assets are traded, bringing efficiency, transparency, and accessibility to the market. However, the Real Estate Security Token market faces challenges, particularly in terms of liquidity. The CMTO(Collateralized Mortgage Token Obligation) model addresses this issue by introducing a novel approach that combines the benefits of NFT(Non-Fungible Token), STO(Security Token Offering), and CMO(Collateralized Mortgage Obligation) techniques to enhance liquidity and promote investment in Real Estate Security Token. The CMTO framework functions by allowing DABS token investors to leverage their tokens as collateral for loans. These token-collateralized loans are pooled together and form the basis for issuing Sequential CMO named CMTO. The CMTO represent a diversified portfolio of token-collateralized loans, providing investors with options based on their financial goals and risk preferences. By implementing CMTO, the Real Estate Security Token market can overcome liquidity challenges, attract a broader range of investors, and unlock the full potential of digital assets in the real estate industry.

Examining Portraits in Digital Fashion Art Non-Fungible Tokens (NFTs) through Baudrillard's Simulation

  • Yoon Kyung Lee
    • Journal of the Korean Society of Clothing and Textiles
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    • v.47 no.5
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    • pp.929-942
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    • 2023
  • Web 3.0 enables people and machines to connect, evolve, share, and use knowledge on an unprecedented scale and in new ways, drastically improving our Internet experience. The metaverse is a collective, virtual shared space supporting all digital activities. Prompted by the rapid growth of digital art and digital fashion, this theoretical analysis explores using Jean Baudrillard's simulation concept to create unique digital art non-fungible tokens (NFTs), allowing them to express and communicate ideas like real-world art. Specifically, this study analyzes 120 digital fashion portraits of humans and animals and classifies them under three types of simulacra covering four stages of Baudrillard's simulation process. The result shows that NFT fashion artworks reflect the core features of a digital reality by connecting and transcending the boundaries of cultures, genders, and nationalities. However, in the final simulation stage (the fourth step), the simulacrum can only coexist in the virtual world as a hyperreal object (the Type III of simulacrum): an object more real than reality.

Investigating the Effects of Art Product's NFT Characteristics on Purchase Intention for Self and Others

  • Seung-Ho Ryu;Hyeon-Cheol Kim
    • International journal of advanced smart convergence
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    • v.12 no.4
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    • pp.334-343
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    • 2023
  • A research model was developed in this study from previous research to illustrate the relationship among perceived scarcity, assumed expensiveness of art products, perceived functional value, perceived symbolic value as well as purchase for self and others. 639 valid cases who have experienced NFT art products have been collected for data analyses. The R software has been chosen for analysis. The results have revealed that perceived scarcity was positively related to perceived functional value and perceived symbolic value, but it was assumed that the expensiveness of art products was not significantly related to perceived functional value or perceived symbolic value. Moreover, functional value was significantly related to the purchase intention of both self and others, while symbolic value only was significantly affected by the purchase intention of others. The results of this study have provided managerial implications for future studies.

Estimation of Transpiration Rate with a Metering Pump and its Application in Soilless Culture System (정량펌프를 이용한 무토양재배시스템의 증산량 추정 및 그 응용)

  • Son, Jung-Eek;Park, Jong-Seok
    • Horticultural Science & Technology
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    • v.16 no.1
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    • pp.25-26
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    • 1998
  • Nutrient supplying by a metering pump often produces the inaccuracy in the rate of inflow than expected. In this study, we developed the transpiration estimation system using the metering pump to measure the continuous supplying rate as well as to estimate the accurate transpiration rate. The system showed the stable characteristics by eliminating the fluctuations in the head loss of nutrient tank. The direct proportionality between the supplying time and the supplied nutrient solution was obtained. The exact correlation between the integrated solar radiation and the transpiration rate using the system was calculated, and correlation coefficients between the two factors were 0.98 in the NFT system and 0.92 in the aggregate system. This results suggest that the integrated solar radiation was an important factor to directly decide the supplying volume of nutrient solution in soilless culture system. The deveolped system using the metering pump in the study was able to control the supply of the nutrient solution to the crops adjusting to the variation of solar radiation.

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