• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.1417-1420
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• 2004

The combination of Fast-Handoff and Hierarchical Mobile IPv6 (F-HMIPv6) allows the anticipation of the layer3 handoff such that data traffic can be efficiently redirected to the mobile node's new location before it moves there. However, after moving to the new Access Router (NAR), if the mobile node (MN) sends the Local Binding Update (LBU) to the Mobility Anchor Point (MAP) before receiving all of the buffered packet from the NAR, the MN may receive the general packet from the MAP. That is, the MN may simultaneously receive two types of packet which has different sequence number. These cause the confusion in packet order, and the MN sends the dup ack for the packet retransmission to the CN. It results in the degradation of the TCP performance. Therefore, we propose the scheme for minimizing the out-of-sequence packet in F-HMIPv6.

• Bulletin of the Korean Chemical Society
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• 제24권3호
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• pp.389-392
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• 2003

• Environmental Engineering Research
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• 제20권1호
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• pp.51-57
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• 2015

As expected, the expression of denitrifying genes in a Typha wetland (relatively stagnant compared to other ponds), showing higher nitrogen removal efficiency in summer, was affected by temperature. The abundance and gene transcripts of nitrate reductase (narG), nitrite reductase (nirS), nitric oxide reductase (norB), and nitrous oxide reductase (nosZ) genes in seasonal sediment samples taken from the Acorus and Typha ponds of free surface flow constructed wetlands were investigated using quantitative polymerase chain reaction (Q-PCR) and quantitative reverse transcription PCR (Q-RT-PCR). Denitrifying gene copy numbers ($10^5-10^8$ genes $g^{-1}$ sediment) were found to be higher than transcript numbers-($10^3-10^7$ transcripts $g^{-1}$ sediment) of the Acorus and Typha ponds, in both seasons. Transcript numbers of the four functional genes were significantly higher for Typha sediments, in the warm than in the cold season, potentially indicating greater bacterial activity, during the relatively warm season than the cold season. In contrast, copy numbers and expression of denitrifying genes of Acorus did not provide a strong correlation between the different seasons.

• Bulletin of the Korean Chemical Society
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• 제31권11호
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• pp.3279-3282
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• 2010

The reaction rates of 4-X-2,6-dinitrochlorobenzenes (X = $NO_2$, CN, $CF_3$) with Y-substituted benzylamines (Y = p-$OCH_3$, p-$CH_3$, H, p-Cl) in MeOH-MeCN mixtures were measured by conductometry at $25^{\circ}C$. It was observed that the rate constant increased in the order of X = $NO_2$ > CN > $CF_3$ and in the order of Y = p-$OCH_3$ > p-$CH_3$ > H > p-Cl. When the solvent composition was varied, the rate constant increased in the order of 100% MeOH < 50% (v/v) MeOH-MeCN < 100% MeCN. These results may be ascribed to the formation of hydrogen bonds between the alcoholic hydrogen and nitrogen of benzylamines in groud state (GS). We conclude that the reaction takes place via $S_NAr$ base on the transition state parameters ${\rho}x$, ${\rho}Y$, $\beta_{nuc}$, and solvent effects.

• 대한영양사협회학술지
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• 제8권3호
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• pp.240-249
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• 2002

The purpose of this study was to investigate the effects of alcohol intake on nutritional intake status among the college students. The subjects were divided three groups; no-alcohol group(n=78), alcohol group(n=113), and high-alcohol group(n=82) according to intake and frequency of alcohol. And they were observed characteristics of alcohol drinking, dietary behavior and attitude, and nutrient intakes using questionnaires. The frequency of skipping meals in breakfast in high-alcohol group were higher than in other two groups(p<0.01). There were no significant differences in frequency of skipping meals of lunch and supper, reason why skipped meals, and total score of dietary attitude among three groups. However, the score of dietary attitude about no heavy drinking and smoking in high-alcohol group was higher than in other two groups(p<0.01). There were significant difference in vitamin B2 intake, alcohol intake, and energy intakes from carbohydrate, lipid, and alcohol among three groups(p<0.05, p<0.05, p<0.01, p<0.05, p<0.05). Compared energy intake of high-alcohol group with other two groups, intake from carbohydrate was low and intakes from lipid and alcohol were high. In the nutrient density, plant protein and carbohydrate in no-alcohol group, lipid and vitamin B2 in alcohol group, and animal lipid in high-alcohol group were highest among three groups. NAR and MAR were not significant difference among three groups except that NAR of P in alcohol group is highest among three groups(p<0.05). In conclusion, students high consuming alcohol have unhealty dietary behaviors in the light of high frequency of skipping breakfast, undesirable dietary attitude of alcohol drinking and smoking, and low energy inake from diet. Therefore, this results should be considered in meal management and nutritional education for student of high alcohol consumption.

• Journal of Nutrition and Health
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• 제45권2호
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• pp.140-149
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• 2012

본 연구에서는 성인 여성을 대상으로 비만 여부에 따른 영양소 및 식품 섭취의 질을 평가하고, 식사의 질과 비만지표와의 관련성에 대하여 분석하였다. 총 3,565명의 대상자 (정상군 2,841명, 비만군 724명)가 분석에 포함되었고, 그 결과를 요약하면 다음과 같다. 1일 총 섭취 열량에서는 정상군이 1,707.81 kcal로 비만군의 1,634.94 kcal에 비해 유의적으로 높게 나타났으며 (p = 0.0199), 또한 섭취 열량 1,000 kcal당 영양소 섭취량을 분석한 결과 정상군은 비만군에 비해 탄수화물 (p = 0.0298) 및 나트륨 (p = 0.0169)의 섭취량은 유의적으로 낮았던 반면 칼슘 (p = 0.0261)의 섭취량은 유의적으로 높게 나타났다. 칼슘의 경우 정상군에서 권장섭취량 대비 섭취율이 비만군에 비해 유의적으로 높았으며 (p = 0.0178), 평균필요량에 미달되게 섭취하는 대상자의 비율은 유의적으로 낮게 나타났다 (p = 0.0152). 영양소별 NAR 및 MAR을 분석한 결과, 정상군에서 칼슘의 NAR이 0.63으로 비만군의 0.60에 비해 유의적으로 높게 나타났으며 (p = 0.0158), 영양소별 NAR의 평균치인 MAR의 경우 정상군이 0.80, 비만군이 0.79로 두군간 유의한 차이를 보이지 않았다. 또한 1일 총 식품 섭취량은 정상군 1,297.36 g, 비만군 1,271.28 g으로 두군간 유의한 차이를 보이지 않았으나, 우유 및 유제품의 섭취량에서 정상군이 비만군에 비해 유의적으로 높게 나타났다 (p = 0.0162). DDS는 전체 대상자에서 3.753점으로 나타났으며, 정상군이 3.769점으로 비만군의 3.686점 보다 유의적으로 높은 것으로 나타났다 (p = 0.0253). 또한 전체 연구대상자의 DVS는 30.07개로 나타났으며, 정상군과 비만군 각각 30.41개, 28.63개로 나타나 유의적인 차이를 보였다 (p = 0.0003). 식품섭취와 관련된 식사의 질 지수 (DDS, DVS)와 비만과 관련된 신체계측치 (체질량지수, 허리둘레)와의 관계를 분석한 결과, DVS가 많은 대상자들의 허리둘레 및 체질량지수가 더 낮은 경향을 보였으며 (p for trend < 0.01), 이 결과는 연령, 음주 상태, 신체활동 정도 및 열량 섭취량을 보정한 후에도 같은 양상으로 나타났다 (p for trend < 0.01). 이상의 결과를 종합하면, 비만한 성인 여성의 경우 정상 체중인 여성에 비해 칼슘 섭취 및 유제품 섭취의 질이 유의적으로 낮았으며, DDS 및 DVS가 유의적으로 낮아 다양하지 못한 식품 섭취 양상을 보이는 것으로 나타났고, DVS는 체질량지수 및 허리둘레와 유의적인 음의 관계를 보였다. 따라서 이와 같은 결과를 비만한 성인 여성을 대상으로 한 비만 관리에 적용할 때 고른 영양 섭취를 위해 식품군의 구성, 섭취하는 식품의 가짓수 등 영양균형에 중점을 두어 식사지도를 해야 할 것으로 생각되며, 칼슘 섭취의 질과 비만과의 인과관계를 명확히 분석하기 위하여 한국인을 대상으로 한 전향적인 코호트 연구 및 추가 분석이 필요하다고 사료된다.

• 대한지역사회영양학회지
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• 제27권4호
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• pp.321-340
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• 2022

Objectives: This study established a practical direction for the prevention and management of metabolic syndrome by evaluating the health status, nutrition intake level, and diet quality according to metabolic syndrome and related drug treatment in Korean adults. Methods: The data from the 2017 KNHANES (Korea National Health and Nutrition Examination Survey) was analyzed. The analysis included 2,978 adults, classified into the normal, metabolic syndrome (MetS), metabolic syndrome with medicines (MetS-M), and without medicines (MetS-noM) groups. The nutrient intake, NAR (nutrient adequacy ratio), INQ (index of nutritional quality), and DDS (dietary diversity score) were analyzed. Results: The mean BMI was significantly higher in the MetS group than in the normal group for all subjects. Subjects of the MetS group tended to consume less energy and major nutrients, while males aged 50 ~ 64 and all females showed less intake of nutrients in the MetS-M group. The energy intake ratio was within 55 ~ 65 : 7~ 20 : 15 ~ 30 of KDRI (Korean Dietary Recommended Intake), but the carbohydrate energy ratio of all subjects aged 50 to 64 was over 65%. The NAR of the major nutrients was lower in the MetS-M group, the average INQ was around 0.8, especially the INQ of calcium and vitamin A was less than 1, and the total DDS score was less than 4 points. Conclusions: This study confirmed that the nutrient intake and diet quality differed among subjects diagnosed with metabolic syndrome and managed with medical care. The intakes of energy and many nutrients, the quality of diets, and the diversity of food groups in the MetS-M group were lower than in the normal group. Therefore, these will be an important basis for establishing a specific direction of diet education for preventing and managing metabolic syndrome according to gender, age, metabolic syndrome, and drug treatment.

• 한국식품영양학회지
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• 제29권4호
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• pp.456-464
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• 2016

The purpose of this study was to compare the quantitative and qualitative assessment of dietary intake between patients with metabolic syndrome (MetS) and healthy subjects and to investigate dietary factors related to MetS. Anthropometric measurements, blood analysis, and dietary intake as assessed by 24-hour recall were conducted in MetS patients (n=15) and healthy subjects (n=25). In order to assess the quantity and quality of dietary intake, daily nutrient intake, nutrient density, nutrient intake to dietary reference intake (DRI), nutrient adequacy ratio (NAR), food intake, dietary diversity score (DDS), and dietary variety score (DVS) were analyzed. The statistical differences between MetS patients and controls were analyzed using the SAS software program. Daily energy intake and food intake were not significantly different between the two groups (2,154.3 kcal vs. 1,872.9 kcal; 1,280.0 g vs. 1,261.6 g). There were also no significant differences in daily nutrient intake, nutrient intake ratio to DRI, NAR, or DVS between the MetS group and the control group. However, daily intake of eggs and milk in MetS patients was significantly lower than in the control group (9.0 g/day vs. 30.3 g/day, p<0.05; 0 g/day vs. 49.7 g/day, p<0.05). These results indicate that low intake of eggs and dairy products may be related to the development of MetS.

• Bulletin of the Korean Chemical Society
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• 제31권3호
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• pp.708-711
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• 2010

• Bulletin of the Korean Chemical Society
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• 제32권spc8호
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• pp.3145-3148
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• 2011