• Proceedings of the Korean Nutrition Society Conference
• /
• 1998.05a
• /
• pp.47-47
• /
• 1998

• Proceedings of the Korean Nutrition Society Conference
• /
• 2001.05a
• /
• pp.153.2-153
• /
• 2001

• Proceedings of the Korean Nutrition Society Conference
• /
• 2001.05a
• /
• pp.179.1-179
• /
• 2001

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.50 no.6
• /
• pp.369-377
• /
• 2005

Precise application of topdressing nitrogen (N) fertilizer is indispensible for securing high yield and good quality of rice and minimizing N losses to the environment as well. For precise N management, growth and nitrogen nutrition status (NNS) should be diagnosed rapidly and accurately. The objective of the study was to evaluate the applicability of vegetation index (VI) calculated from hyperspectral canopy reflectance measurement and SPAD reading to nondestructive in situ diagnosis of growth and NNS of rice. Canopy reflectance, SPAD read­ing, growth parameters, and NNS characteristics were measured from various N treatments to evaluate the relationships among them for two cropping seasons from 2001 to 2002. The correlation coefficient of VIs with variables of growth and NNS increased positively as rice canopy became more closed. Regardless of growth stages, VIs had significantly high correlations with LAI, shoot dry weight (DW), shoot N content and nitrogen nutrition index (NNI). Those correlation coefficients increased steadily before heading stage as rice grew up. However, tiller number and leaf N concentration showed significantly high correlations with VIs only at and after panicle initiation stage (PIS). Among the VIs, RVIgreen had significantly higher correlation with the measured parameters than the other VIs: it showed correlation coefficients greater than 0.8 with leaf and shoot N concentration and DW, and much higher coefficients greater than 0.9 with LAI, shoot N content, and NNI. At LAI of below 2.5, VIs had non-significant or low correlations with the growth and NNS indicators due to the background effects. SPAD reading had significantly high correlation with leaf N concentration and NNI at each growth stage. In addition, it had significant correlations with variables of growth and NNS at PIS and booting stage, particularly, at booting stage. Though SPAD reading had a significantly high correlation value at a given growth stage in each year, it showed very weak relationship with variables of growth and NNS when pooled across growth stages and years. In conclusion, RVIgreen was found to be the most reliable VI to estimate the growth and NNS of rice around at PIS, but SPAD reading had much limitations.

• Proceedings of the Korean Nutrition Society Conference
• /
• 1999.05b
• /
• pp.94-94
• /
• 1999

• Proceedings of the Korean Nutrition Society Conference
• /
• 2003.05a
• /
• pp.158.2-158.2
• /
• 2003

• Korean Journal of Ecology and Environment
• /
• v.48 no.4
• /
• pp.287-295
• /
• 2015

Akinete germination potential and algal growth potential (AGP) using Anabaena circinalis were investigated September 2014 and March 2015 at the three sites (PD-1, PD-2 and PD-3) of Lake Paldang. Nitrogen and phosphorus concentrations were higher at PD-2 than at PD-1 and PD-3. TSI (TN) values at the three field sites were in the range of 65~85, which were the level of eutrophic or hypereutrophic state. TSI (TP) also showed high values (49~68), which were the level of mesotrophic or eutrophic state. Akinete germination potential was higher at PD-2 with increased nutrient (nitrogen and phosphorus), and algal growth potential also increased with nutrient enrichment.

• Journal of agricultural medicine and community health
• /
• v.34 no.2
• /
• pp.244-255
• /
• 2009

Objectives: This study was to identify and test the health and nutritional status of grandparents in grandparents-grandchildren family in rural area. Methods: The subjects of this study were 70 grandparents of grandparents - grandchildren family in Muan-Gun. The collected data were analyzed by descriptive statistics, regression analysis. Results: The average age of grandparents was 70.1${\pm}$6.6 years old, unhealthy of the subjective health status was 55.7%, MNA score was 21.0${\pm}$3.5 points and 62.2% of the grandparents were shown to have malnutritonal status. The ADL, IADL, depression and fall index of health status were significantly related to the relationship with gender(p<.01), age(p<.05), economic(p<.01) and educational level(p<.01), and partnership(p<.01). MNA score was significantly related to the relationship with acute disease(p<.05), ADL(p<.001), IADL(p<.01), cognitive function(p<.01) and gender(p<.01). And the health status variables and general characteristics were positively correlated while the relationships were positive between health status variables and MNA score. Conclusions: With the above findings, grandparents of grandparents-grandchildren family have the problems of health and nutritional status. Then health and nutritional intervention program for grandparents-grandchildren family is needed to serve.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.17 no.6
• /
• pp.731-737
• /
• 2007

In this paper, we propose a system for analyzing nutrition status based on hierarchical fuzzy inference approach, where the hierarchical fuzzy approach used to analyze the transition process on the nutritional status from an obesity degree, the previous nutritional status, and the eating pattern with an individual. Moreover we discussed about the selection method of fuzzy membership intervals of the next layer to improve the reliability of inference results in hierarchical fuzzy system, where their intervals are modified by using statistical information of the defuzzified results obtained from the previous layer. To show the effectiveness of this system, we evaluated the nutritional status from the information of anthropometric measurement, biochemical test, and INQ on 113 people over the age of 65, and also analyzed their nutritional status.

• Journal of Nutrition and Health
• /
• v.43 no.2
• /
• pp.189-196
• /
• 2010

Malnutrition has been associated with higher hospital costs, mortality, rates of complications and longer length of hospital stay. Several nutritional screening tools have been developed to identify patients with malnutrition risk. However, many of those require much time and labor to administer and may not be applicable to a Korean population. Therefore, the aim of this study was to develop nutritional screening tool for Korean inpatients. Then we compare nutritional screening tools that developed and previously described. Seven hundred sixty-four patients at hospital admission were screened nutritional status and classified as well nourished, malnutrition stage 1 or stage 2 by the KNNRS (Kyunghee Neo Nutrition Risk Screening), PG-SGA (Patient-Generated Subjective Global Assessment) and NRS-2002 (Nutritional Risk Screening-2002). The KNNRS, PG-SGA and NRS-2002 respectively classified 28.7%, 51.3%, 48.5% of patients as malnourished status. Compared to the PG-SGA, the KNNRS had sensitivity 60.7% (95% CI 54.2-67.0) and specificity 81.2% (95% CI 75.3-85.2). Agreement was fair between KNNRS and PG-SGA (k = 0.34). Compared to the NRS-2002, the KNNRS had sensitivity 57.8% (95% CI 53.4-60.9) and specificity 64.4% (95% CI 60.2-69.8). Agreement was poor between KNNRS and NRS-2002 (k = 0.18). These result should include that the KNNRS and PGSGA have clinical relevance and fair concordance. However the rate of malnourished patients by KNNRS were less than by PG-SGA. For more effectivity of nutritional screening and management, the criteria of KNNRS would be better revised.