• Title/Summary/Keyword: developed environmental resources

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Application of Near-Infrared Reflectance Spectroscopy to Rapid Determination of Seed Fatty Acids in Foxtail Millet (Setaria italica (L.) P. Beauv) Germplasm

  • Lee, Young Yi;Kim, Jung Bong;Lee, Sok Young;Lee, Ho Sun;Gwag, Jae Gyun;Kim, Chung Kon;Lee, Yong Beom
    • Korean Journal of Breeding Science
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    • v.42 no.5
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    • pp.448-454
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    • 2010
  • The objective of this study was to rapidly evaluate fatty acids in a collection of foxtail millet (Setaria italica (L.) P. Beauv) of different origins so that this information could be disseminated to breeders to advance germplasm use and breeding. To develop the calibration equations for rapid and nondestructive evaluation of fatty acid content, near-infrared reflectance spectroscopy (NIRs) spectra (1104-2494 nm) of samples ground into flour (n=100) were obtained using a dispersive spectrometer. A modified partial least-squares model was developed to predict each component. For foxtail millet germplasm, our models returned coefficients of determination ($R^2$) of 0.91, 0.89, 0.98 and 0.98 for strearic acid, oleic acid, linoleic acid, and total fatty acids, respectively. The prediction of the external validation set (n=10) showed significant correlation between references values and NIRs values ($r^2=0.97$, 0.91, 0.99 for oleic, linoleic, and total fatty acids, respectively). Standard deviation/standard error of cross-validation (SD/SECV) values were greater than 3 (3.11, 5.45, and 7.50 for oleic, linoleic, and total fatty acids, respectively). These results indicate that these NIRs equations are functional for the mass screening and rapid quantification of the oleic, linolenic, and total fatty acids characterizing foxtail millet germplasm. Among the samples, IT153491 showed an especially high content of fatty acids ($84.06mg\;g^{-1}$), whereas IT188096 had a very low content ($29.92mg\;g^{-1}$).

Implimentation of Smart Farm System Using the Used Smart Phone (중고 스마트폰을 활용한 스마트 팜 시스템의 구현)

  • Kwon, Sung-Gab;Kang, Shin-Chul;Tack, Han-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.11
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    • pp.1524-1530
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    • 2018
  • In this paper, we designed a product that can prevent environmental pollution, waste of resources, and leakage of foreign currency by commercializing a green IT solution by merging a used smart phone with the IoT object communication technology for the first time in the world. For the experiment of the designed system, various performance and communication condition was experimented by installing it in the actual crop cultivation facility. As a result, when a problem occurs, the alarm sound and video notification are generated by the user's smart phone, and remote control of various installed devices and data analysis in real time are possible. In this study, it is thought that the terminal management board developed for the utilization of the used smart phone can be applied to various fields such as agriculture and environment.

Study on the Promotion of Recycling of Old Fire Extinguishers (폐 소화기 재활용 촉진 방안에 관한 연구)

  • Jin, Young-Bae;Jung, Myung-won;Oh, Jung-Seok
    • Fire Science and Engineering
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    • v.33 no.1
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    • pp.156-163
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    • 2019
  • This study examined the recycling system of a foreign lung excreta system. First, the measures for promoting the recycling of a pulmonary digestive system were as follows. Second, a manual considering specialization, such as the construction of a recycling treatment system of fire extinguishers and the collection, transportation, recycling, publicity, and education of fire extinguishers, were developed. Third, an education and counseling system is needed to overcome the lack of experience and technical support for systematic and safe disposal of pulmonary digestive system. Fourth, to promote the recycling of fire extinguishers in the government and fire extinguisher related organizations, it is necessary to prevent environmental pollution and recycle parts to reduce the waste of resources and improve the fire extinguisher quality by fostering a fire safety industry and policy support.

Thematic and geometric analysis of Bangpo beach based on UAV Remote Sensing (무인항공기반 태안반도 방포해빈의 지형분석)

  • Bae, Sungji;Yu, Jaehyung;Jeong, Yong-Sik;Yang, Dongyoon;Han, Min
    • Journal of The Geomorphological Association of Korea
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    • v.23 no.1
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    • pp.117-128
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    • 2016
  • High resolution aerial photographs and digital elevation models for Bangpo beach using UAV were generated in this study to analyze the thematic and geometric characteristics of coastal features. Based on 728 aerial images acquired on September 10, 2016 by the UAV, a image mosaic at 2.2 cm spatial resolution and a digital elevation model at 4.4 cm spatial resolution were developed. This study found out that Bangpo beach consisted of intertidal zone and supratidal zone. The intertidal zone can be subdivided into lower part and upper part with distinctive geomorphological characteristics. While the lower part included sand bars and ripple marks along the coastline, the cusps and sand dunes were the major coastal features of the upper part. Part of the intertidal zone was occupied by shore platform with average slope of 0.9 degree containing various sizes of gravels. The supratidal zone slanted toward ocean with berms on the surface with an interval of 15 m. These coastal features indicated the flow intensity towards to the land and tidal effect. It validated that the UAV application in coastal research was very effective analyzing to examine coastal processes.

Development of virtual upcycling fashion design based on 3-dimensional digital clothing technology (디지털 클로딩 기술 기반 가상착의 업사이클링 패션디자인)

  • Chen, Tianyi;Yang, Eun Kyoung;Lee, Younhee
    • The Research Journal of the Costume Culture
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    • v.29 no.3
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    • pp.374-387
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    • 2021
  • The purpose of this study is to develop up-cycling fashion design methods centered on discarded denim material for the study of original up-cycling design methods. Up-cycling fashion design work was developed using digital clothing technology. This is a recent hot topic among sustainable fashion design methods. Up-cycling fashion design expression methods (categorized as dismantlement, collages, dépaysement, grafting, weaving, and tearing) were centered on design methods. These methods create various three-dimensional modeling effects in planar forms, whereby five pieces can be applied to the fabric and digitally produced. The results are as follows: First, the use of discarded denim fabric for the development of up-cycling fashion design pieces enabled the recycling of existing resources, provided solutions to environmental pollution problems, and provided expansion opportunities for design processes for sustainable fashion products that expand the design value of denim products and their utility. Second, new eco-friendly fashion designs that attempt to achieve diversity in modern fashion trends could be presented through formative contemporary fashion produced by up-cycling work products. Third, up-cycling fashion design work is expected to provide opportunities for eco-friendly fashion design methods. This will expand the value of sustainable fashion design by recycling simple waste materials through the use of three-dimensional digital clothing technology and further through the presentation of expanded life cycles that extend product planning, production, and life cycles.

Deep Learning-Based, Real-Time, False-Pick Filter for an Onsite Earthquake Early Warning (EEW) System (온사이트 지진조기경보를 위한 딥러닝 기반 실시간 오탐지 제거)

  • Seo, JeongBeom;Lee, JinKoo;Lee, Woodong;Lee, SeokTae;Lee, HoJun;Jeon, Inchan;Park, NamRyoul
    • Journal of the Earthquake Engineering Society of Korea
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    • v.25 no.2
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    • pp.71-81
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    • 2021
  • This paper presents a real-time, false-pick filter based on deep learning to reduce false alarms of an onsite Earthquake Early Warning (EEW) system. Most onsite EEW systems use P-wave to predict S-wave. Therefore, it is essential to properly distinguish P-waves from noises or other seismic phases to avoid false alarms. To reduce false-picks causing false alarms, this study made the EEWNet Part 1 'False-Pick Filter' model based on Convolutional Neural Network (CNN). Specifically, it modified the Pick_FP (Lomax et al.) to generate input data such as the amplitude, velocity, and displacement of three components from 2 seconds ahead and 2 seconds after the P-wave arrival following one-second time steps. This model extracts log-mel power spectrum features from this input data, then classifies P-waves and others using these features. The dataset consisted of 3,189,583 samples: 81,394 samples from event data (727 events in the Korean Peninsula, 103 teleseismic events, and 1,734 events in Taiwan) and 3,108,189 samples from continuous data (recorded by seismic stations in South Korea for 27 months from 2018 to 2020). This model was trained with 1,826,357 samples through balancing, then tested on continuous data samples of the year 2019, filtering more than 99% of strong false-picks that could trigger false alarms. This model was developed as a module for USGS Earthworm and is written in C language to operate with minimal computing resources.

Improvement of Drought Operation Criteria in Agricultural Reservoirs (농업용 저수지 이수관리를 위한 저수율 가뭄단계기준 개선)

  • Mun, Young-Sik;Nam, Won-Ho;Woo, Seung-Beom;Lee, Hee-Jin;Yang, Mi-Hye;Lee, Jong-Seo;Ha, Tae-Hyun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.64 no.4
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    • pp.11-20
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    • 2022
  • Currently, the operation rule of agricultural reservoirs in case of drought events follows the drought forecast warning standard of agricultural water supply. However, it is difficult to preemptively manage drought in individual reservoirs because drought forecasting standards are set according to average reservoir storage ratio such as 70%, 60%, 50%, and 40%. The equal standards based on average water level across the country could not reflect the actual drought situation in the region. In this study, we proposed the improvement of drought operation rule for agricultural reservoirs based on the percentile approach using past water level of each reservoir. The percentile approach is applied to monitor drought conditions and determine drought criteria in the U.S. Drought Monitoring (USDM). We applied the drought operation rule to reservoir storage rate in extreme 2017 spring drought year, the one of the most climatologically driest spring seasons over the 1961-2021 period of record. We counted frequency of each drought criteria which are existing and developed operation rules to compare drought operation rule determining the actual drought conditions during 2016-2017. As a result of comparing the current standard and the percentile standard with SPI6, the percentile standard showed severe-level when SPI6 showed severe drought condition, but the current standard fell short of the results. Results can be used to improve the drought operation criteria of drought events that better reflects the actual drought conditions in agricultural reservoirs.

S. Korea's Approach Strategy through Policy Analysis of Major Countries to Promote the Use of Forest Biomass as Renewable Energy (재생에너지로서 산림바이오매스 활용 촉진을 위한 주요국의 정책분석을 통한 한국의 접근전략)

  • Lee, Seung-Rok;Park, Sehun;Koh, Moon-Hyun;Han, Gyu-Seong
    • New & Renewable Energy
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    • v.18 no.3
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    • pp.10-22
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    • 2022
  • Forest biomass energy is based on scientific evidence in response to carbon neutrality and the climate crisis, international consensus, and environmental-geographic characteristics of each nation. In this study, the authors aimed to analyze macroscopic forest biomass energy policies for ten major countries. They categorized them into six detailed categories (Sustainable utilization, Cascading Uutilization, Replacement of fossil fuel/Carbon intensive products, Utilization of forest by-products/residues as the source of energy, Contribution to carbon-neutral/climate change, and Biomass combined with CCS/CCUS ). In addition, the surveyed nations have developed a policy consensus on the active use of forest biomass with sustainable forest management except for the cascading utilization category. Furthermore, the authors evaluated the mid to long-term plans of the Korean government for improvements in the policy and legal aspects. As a result, the authors derived four major directions that South Korea should approach strategically in the future (1) secure financial resources for sustainable forest management and stimulating investment in the timber industry, (2) promote unified policies to establish a bio-economy, (3) enhancement of the forest biomass energy system, and (4) reorganization and promotion of strategy centered on the opinions of field experts in internal and external instability.

A Study to Evaluate and Remedy Universal Soil Loss Equation Application for Watersheds and Development Projects (범용토양유실공식의 유역단위 및 개발사업에 대한 적용방안 검토 및 보완에 관한 연구)

  • Woo, Won Hee;Chae, Min Suh;Park, Jong-Yoon;Lee, Hanyong;Park, Youn Shik
    • Journal of The Korean Society of Agricultural Engineers
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    • v.65 no.3
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    • pp.29-42
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    • 2023
  • Universal Soil Loss Equation (USLE) is suggested and employed in the policy to conserve soil resources and to manage the impact of development, since soil loss is very essential to nonpoint source pollution management. The equation requires only five factors to estimate average annual potential soil loss, USLE is simplicity provides benefits in use of the equation. However, it is also limitation of the model, since the estimated results are very sensitive to the five factors. There is a need to examine the application procedures. Three approaches to estimate potential soil loss were examined, In the first approach, all factors were prepared with raster data, soil loss were computed for each cell, and sum of all cell values was determined as soil loss for the watersheds. In the second approach, the mean values for each factor were defined as representing USLE factors, and then the five factors were multiplied to determine soil loss for the watersheds. The third approach was same as the second approach, except that the Vegetative and Mechanical measure was used instead of the Cover and management factor and Support practice factor. The approaches were applied in 38 watersheds, they displayed significant difference, moreover no trends were detected for the soil loss at watersheds with the approaches. Therefore, it was concluded that there is a need to be developed and provided a typical guideline or public systems so that soil loss estimations have consistency with the users.

Surface erosion of MICP-treated sands: Erosion function apparatus tests and CFD-DEM bonding model

  • Soo-Min Ham;Min-Kyung Jeon;Tae-Hyuk Kwon
    • Geomechanics and Engineering
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    • v.33 no.2
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    • pp.133-140
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    • 2023
  • Soil erosion can cause scouring and failures of underwater structures, therefore, various soil improvement techniques are used to increase the soil erosion resistance. The microbially induced calcium carbonate precipitation (MICP) method is proposed to increase the erosion resistance, however, there are only limited experimental and numerical studies on the use of MICP treatment for improvement of surface erosion resistance. Therefore, this study investigates the improvement in surface erosion resistance of sands by MICP through laboratory experiments and numerical modeling. The surface erosion behaviors of coarse sands with various calcium carbonate contents were first investigated via the erosion function apparatus (EFA). The test results showed that MICP treatment increased the overall erosion resistance, and the contribution of the precipitated calcium carbonate to the erosion resistance and critical shear stress was quantified in relation to the calcium carbonate contents. Further, these surface erosion processes occurring in the EFA test were simulated through the coupled computational fluid dynamics (CFD) and discrete element method (DEM) with the cohesion bonding model to reflect the mineral precipitation effect. The simulation results were compared with the experimental results, and the developed CFD-DEM model with the cohesion bonding model well predicted the critical shear stress of MICP-treated sand. This work demonstrates that the MICP treatment is effective in improving soil erosion resistance, and the coupled CFD-DEM with a bonding model is a useful and promising tool to analyze the soil erosion behavior for MICP-treated sand at a particle scale.