• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.90-90
• /
• 2022

Nicaragua is located in Central America, climatic conditions are considered tropical dry forest. Statistics reflex that in Nicaragua exits 24,000 rice farmers. National rice production only covers 73% of the national consumption. It exists two sowing system: irrigation and rainfed. Varieties used in both systems are mid-late maturity (120-135 days), there are 14 released varieties for irrigation, eight for rainfed, and eight landraces used in rainfed. The current breeding system (introduction of lines from Colombia) has increased the national production, however, has some limitation due to the lack of enough variability, reducing the proability of finding good genotypes and therefore the possibility of satisfying 100% of the demand. The purpose of this study was to analyze the problems that must be resolved in the short and long term to improve rice productivity in Nicaragua. In this paper we explain some proposal for an improvement plan. The selection of varieties with high adaptability to various cultivation environmental conditions it is necessary, also to thoroughly manage seed purity to supply certified seeds. In rice cultivation technology, it needs to improve seedling standing and weeding effect by improving soil leveling and water-saving cultivation technology. Also, proper fertilization and planting density must be established in irrigated and rain-fed areas. Furthermore, capacity must be strengthened by collecting and training with the most recent agricultural technology information, as well as by revitalizing the union rather than the individual farmer. It is necessary to develop varieties highly adaptable to the Nicaraguan cultivation environment, as well as to expand irrigation facilities and cultivation technology suitable for weather conditions in rain-fed areas. Last, it is necessary to maintain the consistency of agricultural policy for continuous and stable rice production in response to climate change events such as drought or intermittent heavy rain.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
• /
• pp.324-327
• /
• 2008

Microwave remote sensing has great potential, especially in monsoon Asia, since optical observations are often hampered by cloudy conditions. The radar backscattering characteristics of rice crop were investigated with a ground-based automatic scatterometer system. The system was installed inside a shelter in an experimental paddy field at the National Institute of Agricultural Science and Technology (NIAST) before transplanting. The rice cultivar was a kind of Japonica type, called Chuchung. The scatterometer system consists of X-band antennas, HP8720D vector network analyzer, RF cables, and a personal computer that controls frequency, polarization and data storage. This system automatically measures fully-polarimatric backscattering coefficients of rice crop every 10 minutes, accompanied by a digital camera that takes pictures in a fixed position with the same interval. The backscattering coefficients were calculated by applying a radar equation. Plant variables, such as leaf area index (LAI), biomass, plant height and weather conditions were measured periodically throughout the rice growth season. We have performed polarimetric decomposition of paddy data such as single, double and volume scattering to extract the scattering information effectively. We investigated the relationships between backscattering coefficients and the plant variables.

• International Journal of Computer Science & Network Security
• /
• 제23권4호
• /
• pp.103-110
• /
• 2023

Financial inclusion is the safe and timely access of formal financial services to people at affordable costs. Various barriers of legacy financial system hinder the involvement of all segments of populations in the financial sector. The journey from financial exclusion to financial inclusion has to be achieved with the implementation of technological breakthroughs. Covid-19 has also raised the need for technology in all sectors of the economy. This research paper introduces the concept of intelligent financial inclusion which is the provision of financial services to people with the help of intelligent systems. This intelligent system will take the concepts from the human mind, cognitive sciences, and artificial intelligence tools and techniques. For achieving the optimal level of financial inclusion, economies must shift their financial sector from traditional means to intelligent financial systems. In this way, intelligent financial inclusion will achieve the target of involving all people in the financial sector.

• 한국군사과학기술학회지
• /
• 제12권3호
• /
• pp.344-353
• /
• 2009

In this paper, I have proposed a design of process support system based on CMMI process which can support integrated management and repository for CMMI model processes. The system assists small organization to improve business process and offers institutionalized automatic environment to users for use of CMMI processes. The proposed system also can enhance quality and productivity of project by including features such as convenience of project management, planned project administration and steady process improvement.

• Journal of Animal Science and Technology
• /
• 제65권2호
• /
• pp.365-376
• /
• 2023

Pig breeding management directly contributes to the profitability of pig farms, and pregnancy diagnosis is an important factor in breeding management. Therefore, the need to diagnose pregnancy in sows is emphasized, and various studies have been conducted in this area. We propose a computer-aided diagnosis system to assist livestock farmers to diagnose sow pregnancy through ultrasound. Methods for diagnosing pregnancy in sows through ultrasound include the Doppler method, which measures the heart rate and pulse status, and the echo method, which diagnoses by amplitude depth technique. We propose a method that uses deep learning algorithms on ultrasonography, which is part of the echo method. As deep learning-based classification algorithms, Inception-v4, Xception, and EfficientNetV2 were used and compared to find the optimal algorithm for pregnancy diagnosis in sows. Gaussian and speckle noises were added to the ultrasound images according to the characteristics of the ultrasonography, which is easily affected by noise from the surrounding environments. Both the original and noise added ultrasound images of sows were tested together to determine the suitability of the proposed method on farms. The pregnancy diagnosis performance on the original ultrasound images achieved 0.99 in accuracy in the highest case and on the ultrasound images with noises, the performance achieved 0.98 in accuracy. The diagnosis performance achieved 0.96 in accuracy even when the intensity of noise was strong, proving its robustness against noise.

• 식품과학과 산업
• /
• 제41권2호
• /
• pp.5-15
• /
• 2008

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.633-636
• /
• 2007

The objective of this study is to measure backscattering coefficients of paddy rice using L, C, X-bands scatterometer system during a rice growth period. The measurement was conducted at an experimental field located in National Institute of Agricultural Science and Technology (NIAST), Suwon, Korea. The rice cultivar was a kind of Japonica type, called Chuchung. The scatterometer system consists of dual-polarimetric square horn antennas, HP8720D vector network analyzer (20MHz ${\sim}$ 20GHz), RF cables, and a personal computer that controls frequency, polarization and data storage. The scatterometer system is calibrated using a calibration kit (3.5mm, 85052D). The backscattering coefficients were calculated by applying radar equation for the measured at incidence angles between $20^{\circ}$ and $60^{\circ}$ for four polarization (HR, VV, HV, VH), respectively, and compared with rice growth data such as plant height, stem number, biomass, dry weight and LAI that were collected at time of each scatterometer measurement simultaneously.

• 한국물환경학회지
• /
• 제23권2호
• /
• pp.260-265
• /
• 2007

This study was carried out to complement water quality standards and to establish new concept for water quality standards reflecting current state of water quality in small streams. By this purpose, discriminant analysis was performed and Water Quality Level Model (WQLM) was developed using the data such as EC, BOD, $COD_{Mn}$, SS, T-N, T-P, $NH_3-N$ in 224 agricultural streams. To give water quality level for water quality parameters, it divided into 20% respectively in the order of excellent water quality. On the basis of the lowest water quality level, water quality level of small streams is granted. As a result of it, number of stream corresponding to Level I was no, Level II was 2 streams, Level III was 22 streams, Level IV was 70 streams, and Level V was 130 streams. Average of water quality in each level was the highest in Level V. EC, SS, and T-N of 7 parameters were selected in variance concerned water quality level. By standardized canonical discriminant function coefficient, EC of three variances was the highest in 0.625 at the discriminant power. The next was T-N (0.509), SS (0.414). By discriminant function for water quality level, Level II was equal to $-2.973+19.376{\times}(EC)+0.647{\times}(T-N)+0.009{\times}(SS)$, Level III was equal to $-3.288+19.190{\times}(EC)+0.733{\times}(T-N)+0.041{\times}(SS)$, Level IV was equal to $-4.462+27.097{\times}(EC)+0.792{\times}(T-N)+0.053{\times}(SS)$, and Level V was equal to $-9.117+40.040{\times}(EC)+1.305{\times}(T-N)+0.111{\times}(SS)$. As a result of test at real agricultural watershed of Jeongan and Euidang in Gongju city, the fitness of WQLM was high to 88.78%. But, to get accomplished water quality assessment more exactly in agricultural streams, we had to concentrate and get vast data, and WQLM was modified and complemented continually.

• 농약과학회지
• /
• 제12권2호
• /
• pp.141-147
• /
• 2008

최근 국제적으로 화학물질에 대하여 분류체계를 단일화하기 위하여 "화학물질의 분류표지 등에 대한 세계 조화시스템(Globally Harmonized classification system, GHS)" 분류체계를 도입하고 있고, 또한 동물보호법에 따라 실험동물수를 축소한 급성경구독성시험법-고정용량법, 급성독성등급법(acute toxic class method, ATC), Up-and Down법을 새롭게 적용하고 있다. 본 시험은 국내 농약 등록시 수행하고 있는 급성경구독성시험인 $LD_{50}$ 시험법과 개정된 시험법 중 급성독성등급법(ATC)을 비교하여 새로운 시험법 적용과 GHS 분류체계 도입여부를 평가하기 위하여 실시하였다. 시험 농약은$LD_{50}$이 GHS 분류기준의 경계부분에 있는 농약 13종을 선발하여 $LD_{50}$ 시험법과 급성독성등급법을 동시에 수행한 결과 Methidathion EC, Parathion-ethyl의 $LD_{50}$은 $LD_{50}$ 시험법은 각각 57.3, $60\;mg\;kg^{-1}$ 이었고, 급성독성등급법은 $200\;mg\;kg^{-1}$ 으로 $LD_{50}$ 차이가 있었으나, GHS 분류체계의 독성구분 결과 모두 3급으로 동일하게 분류되었고, Carbofuran GR은 $LD_{50}$ 시험법은 $310\;mg\;kg^{-1}$, 급성독성등급법은 $300\;mg\;kg^{-1}$ 으로 비슷하였으나 GHS 분류 3급 기준이 $300\;mgvkg^{-1}$이하이므로 각각 4등급, 3등급으로 분류되었으며, Phosphamidon SL, Endosulfan EC, EPN EC, Dimethoate EC, Phenthoate EC, Zeta-cypermethrin EW, Bifenthrin EC, Fenthion EC, Carbaryl WP, Chlorpyrifos.Diflubenzuron WP의 $LD_{50}$ 은 두 시험 모두 비슷하였고, GHS 독성분류도 동일하였다. 이상의 결과 농약 등록시 급성경구독성시험에 급성독성등급법과 GHS 분류체계에 대한 적용가능성을 제시하고 있다.

• 농약과학회지
• /
• 제20권1호
• /
• pp.1-6
• /
• 2016

농약의 효율적인 방제효과를 얻기 위해서는 적절한 시기에 원하는 작물체의 부위에 균일하게 부착되도록 하는 것이 중요하다. 농약 살포기술(application technology)은 노즐의 형태 및 종류와 같은 미세 조절이 가능한 기계적인 인자가 약효 발현과 작물 잔류성에 영향을 미치는 중요한 요인으로 작용하고 있다. 본 연구에서는 감귤의 더뎅이병에 사용되는 디티아논 액상수화제를 이용하여 감귤 과원에서 사용중인 약제 살포방식 차이에 따른 감귤 잎의 부착량 분포도를 조사하여 살포 방식의 효율성을 비교하였다. 이를 위해 기계식 살포기를 대조구로 하고 노즐 및 살포 방식에 변화를 준 sprinkler 살포시스템 및 speed spray 분사 방법에 대한 감귤잎 부착량을 비교 평가하였다. 시험은 제주도에 위치한 감귤시험장 감귤과원에서 진행하였으며, 감귤잎의 높이 위치별 부착량, 전후면 부착량을 알아보기 위하여 디티아논 43% 액상수화제 1,000배 희석 액을 살포한 후 filter paper와 나뭇잎을 상, 중, 하로 높이로 채취하여 실험에 사용하였다. Speed spray 방식이 engine type spray 방식보다 부착량 및 부착균일성 우수하였고, 모든 살포방식이 잎 뒷면의 부착량을 증가 할 수 있는 방식으로 개선되어야 하며 감귤의 상부 위치의 부착량 평가에서는 마른안개 sprinkler 방식이 가장 우수하였다.