• Journal of Obesity & Metabolic Syndrome
• /
• 제27권4호
• /
• pp.203-212
• /
• 2018

Dynamic energy balance can give clinicians important answers for why obesity is so resistant to control. When food intake is reduced for weight control, all components of energy expenditure change, including metabolic rate at rest (resting energy expenditure [REE]), metabolic rate of exercise, and adaptive thermogenesis. This means that a change in energy intake influences energy expenditure in a dynamic way. Mechanisms associated with reduction of total energy expenditure following weight loss are likely to be related to decreased body mass and enhanced metabolic efficiency. Reducing calorie intake results in a decrease in body weight, initially with a marked reduction in fat free mass and a decrease in REE, and this change is maintained for several years in a reduced state. Metabolic adaptation, which is not explained by changes in body composition, lasts for more than several years. These are powerful physiological adaptations that induce weight regain. To avoid a typically observed weight-loss and regain trajectory, realistic weight loss goals should be established and maintained for more than 1 year. Using a mathematical model can help clinicians formulate advice about diet control. It is important to emphasize steady efforts for several years to maintain reduced weight over efforts to lose weight. Because obesity is difficult to reverse, clinicians must prioritize obesity prevention. Obesity prevention strategies should have high feasibility, broad population reach, and relatively low cost, especially for young children who have the smallest energy gaps to change.

• 여성건강간호학회지
• /
• 제25권2호
• /
• pp.129-142
• /
• 2019

Purpose: The purpose of this study was to investigate the relationship between obesity, body image perception, and weight control for obesity management in adult women. Methods: The subjects of this study were 3,617 women aged over 19 years, who participated in the Seventh Korea National Health and Nutrition Examination Survey 2016. Data were analyzed through complex sampling design data analysis. Results: Right body image perception according to obesity was apparent between 70.6-81.7% of women and 76.5% of women with abdominal obesity perceived that they were normal. Obese women performed more weight control than non-obese women. Women with only abdominal obesity performed less weight control than non-obese women, and 47.3% of them performed weight control. Women who perceived themselves as obese performed more weight control than women who perceived themselves as non-obese (odds ratio, 2.08; confidence interval, 1.69-2.57), but body mass index was not observed to be associated with weight control. Conclusions: Education on abdominal obesity should be provided to increase awareness about abdominal obesity and its effective management, especially in women with only abdominal obesity. In addition, interventions for right body type perception should be provided for proper weight control along with prevention and management of obesity.

• 한국어류학회지
• /
• 제32권2호
• /
• pp.55-62
• /
• 2020

상대 무게 지수(Relative weight index, W_r)는 어류의 표준 무게와 실측 무게의 비율을 산출하는 지수로써 영양상태를 평가하는데 활용된다. 본 연구의 목적은 상대 무게 지수 활용을 위해 국내 담수어류 10종의 표준 무게 산출을 위한 길이-무게 상관관계(표준 LWRs)를 산출하는 것과, 상대 무게 지수 산출 결과에 대한 빈도 분포를 분석하는 것이다. 총 141개 조사 지점에서 798회 어류 채집을 통해 확보한 어류의 길이-무게 데이터를 활용하여 LWRs를 산출하였다. LWRs는 매개변수 a와 b값을 95% 신뢰한계(confidence limits)와 함께 제시하였으며, 모든 종에서 결정계수(r²)는 0.9 이상으로 산출되었고, b값은 Froese (2006)의 예상 범위에 포함되었다. 상대 무게 지수 산출 결과에 대한 빈도 분포 분석은 각 종별로 10~90 백분위수를 10 단위로 산출하여 제시하였으며, 이는 상대 무게 지수를 활용하여 어류의 영양상태를 정량적으로 평가하기 위한 기준으로 활용될 수 있을 것으로 판단된다.

• Journal of Nutrition and Health
• /
• 제30권2호
• /
• pp.155-169
• /
• 1997

This study investigated the effect of weight control by using the commercial appetite suppressant ((-)-hydroxycitric acid(HCA) formula) and nutrition education on 72 obese women over a period of 8 weeks. During the study it conducted nutritional education for women to control their weight, thus analyzed their changes in anthropometric variables. All obese women were randomized in a double-blind method to consume either HCA(HCA group : experimental group) or placebo(placebo group : control group). Two groups were also divided randomly into 2 groups combined with commercial formula diet in 1 meal a day(HD group and PD group : HCA + gormula diet and placebo + formula diet) or not(HO group and conducted with 4 groups(HD, HO, PD, and PO group). All subjects were assigned to consume 800-1500kcal/d balanced diet which is 500kcal less than their usual energy requirement. To evaluate the effect of the weight control program, weight, percent of body fat, waist and hip circumferences, and 5 skinfold thickness were measured up to 5 times in all obese women. The mean weight of the subjects at the onset of the study was 76.5$\pm$10.6kg. The mean body mass index(BMI) wa 30.1$\pm$3.8 and it was in the upper 5 percentile of mean BMI of Korean women. At the end of the program, mean weight loss was 3.5kg after 2 weeks(p<0.001), and 5.8kg after 4 weeks(p<0.001). The waist, hip ratio(WHR) and skinfold thickness measurements of biceps, triceps, subscapular, suprailiac and abdominum showed significant reduction over the entire study period(p<0.05). These outcome were evaluated by effect of nutritional education and counselling. The reduction of % of body fat was significantly different among the 4 groups. Women who administrated HCA demonstrated more change in weight, BMI than the placebo group. There was also significant reduction in body composition (% of body fat, WHR, and skinfold thickness) than the other groups. The HD group which was administrated HCA combined with formula diet was more decreased than other groups. It showed that this program using commercial HCA and formula diet induced not only a change in weight but also a change in body composition. The outcome of this study suggests that HCA has a more effctive change on weight control which is carried out with nutritional education and counselling.

• 한국식품조리과학회지
• /
• 제13권2호
• /
• pp.147-156
• /
• 1997

성인 남녀를 비만도에 따라 저체중군의 체형, 표준 체중군의 체형, 과체중군의 체형으로 구분하여 체형에 대한 인식, 기호습관, 식습관, 건강에 대한 관심도, 체중 조절에 대한 태도 등을 조사한 결과는 다음과 같다. 1. 조사대상자 중 저체중군의 체형이 7.9%,표준체중의 체형이 55.2%, 과페중군의 체형이 36.9%로 나타났으며, 저체중군은 마르고 키가 크고, 과체중군은 뚱뚱하고 키가 작은 경향을 보였다. 또한 자신의 실제체형과 자신이 이상형이라고 생각하는 체형과는 차이가 있는 것으로 나타났으며 이런 경향은 남자보다는 여자가 더욱 심한 것으로 나타났다(p < 0.001). 남자의 42.6%, 여자의 21.5%만이 자신의 체형에 대해 만족하는 것으로 나타났다(p < 0.01). 여자는 체중이 적을수록 자신의 체형에 대한 만족도가 증가하였으며 체형과 상관없이 모두 마른 체형을 선호하는 것으로 나타났다(P < 0.001). 2. 남자의 86.5%, 여자의 49.0%가 술을 마시는 것으로 나타났으며(p < .0.001) 저체중군 남자와 표준체중군 여자가 술을 가장 많이 마시는 것으로 조사되었다. 음주횟수는 1주일에 한 두 번 마신다가 가장 많았다. 남자의 64%가 담배를 피우는 것으로 조사되었으며 여자들은 대부분 흡연하지 않는 것으로 조사되었다(p < 0.001). 기호음료 중에서 남녀 모든 군에서 커피의 선호도가 가장 높게 나타났으며(p .0.01) 남자의 51.0%, 여자의 45.0%가 건강(보조)식품이나 영양제를 먹는다고 응답하였다. 3. 남자의 57%,여자의 45%가 식사를 항상 규칙적으로 하는 것으로 나타났으며 과체중군 여자를 제외하고 모든 체형에서 식사를 항상 규칙적으로 하는 비율이 높게 나타났다. 전혀 규칙적이 아니라고 답한 비율은 표준체중군 여자에게서 가장 높게 나타났다. 3끼의 식사량에 있어서는 남녀 모두 적당하게 먹는다고 응답한 비율이 가장 높았으며 배부르게 먹는 경우는 과체중군에서 높게 나타났다(p < 0.001). 음식의 간에 있어서 남녀 모든 군에서 적당하게 먹거나 싱겁게 먹는다고 답한 비율이 대부분을 차지하였다. 남자의 78.7%, 여자의 92.0%가 간식을 먹는 것으로 조사되었으며(p < 0.01), 저체중군의 간식율이 가장 높게 나타났다. 편식을 안한다고 답한 비율은 남자가 여자보다 높게 나타났으며(p < 0.05), 저체중군의 편식율이 가장 높게 나타났다. 한편, 식사의 질에 대하여 식사를 고칠 필요가 있다고 답한 비율은 남자가 40.4%, 여자가 56.3%로 나타났으며 (p < .0.01), 다른 군에 비하여 저체중군 남자와 과체중군 여자에게서 높게 나타났다. 4. 수면 시간은 남자는 평균 6.92시간, 여자는 6.53시간으로 조사되었으며, 과체중군 남자가 가장 길었으며, 저 체중군 여자가 가장 짧은 것으로 조사되었다. 수면시간에 관해서 남녀 모두 적당하다는 비율이 가장 높았다. 한편 하루 중 노동, 운동, 휴식, 식사의 균형에 관해서 남녀 모두 가끔 그렇다고 응답한 비율이 높게 나타났으며 전혀 아니라고 응답한 비율도 모든 체형에서 24%이상으로 나타났다. 남자의 70.2%,여자의 52.3%는 운동을 하고 있는 것으로 조사되었으며(p < 0.001) 남자는 체형과 상관없이 운동을 가끔하는 비율이 가장 높았으며, 전혀 운동을 하지 않는 비율도 24% 이상으로 나타났다. 여자의 경우 운동을 항상 하고 있는 비율은 저체중군에서, 가끔 하는 비율은 과체중군에서 높게 나타났다. 자각적 건강 상태에 관하여 남녀 모두 과반수 이상이 그저 그렇다고 응답하였으며 건강하여 문제가 없다는 남자에게서, 항상 피곤하고 건강 장애가 있다는 여자에게서 높게 나타났다(p < 0.05). 항상 피곤하고 건강 장애가 있다고 응답한 경우는 과체중군 남자와 표준체중군 여자에게서 가장 높게 나타났다. 5. 남자의 53.9%, 여자의 83.2%가 체중 조절에 관심이 있다고 하였으며(p < 0.001) 남녀 모두 체중이 증가할수록 체중 조절에 대한 관심도가 높아졌다(p < 0.01). 체중 조절에 대한 시도 경험에 대해서는 남자는 생각없다가, 여자는 과거에 몇 차례 해 본 경험이 있다가 가장 높게 나타났다(p < 0.001). 현재도 체중조절을 하고 있다는 응답자는 10% 정도로 조사되었다. 체중 조절 시도 방법에 있어서 남자의 저체중군은 체중을 늘이는 방향으로 과체중군은 체중을 줄이는 방향으로 시도하였으며, 여자의 경우에는 모두 체중을 줄이는 방향으로 시도하는 비율이 높게 나타났다(p < 0.001). 체중조절을 위한 좋은 방법으로는 남자의 경우 음식량의 조절보다는 운동을 많이 한다가 가장 많았으며 여자들은 음식물의 섭취량을 줄인다와 음식 량의 조절보다는 운동을 많이 한다고 답한 비율이 비슷하게 나타났다(P < 0.001).

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2004년도 춘계학술대회 논문집
• /
• pp.209-214
• /
• 2004

This paper deals with tipping over of hydraulic excavator's crane work. If excavator lift too heavy weight, excavator tipped up. This is 38% of whole excavator accidents. In this paper, tipping over load which is maximum load of excavator can lift with displacement of excavator links, real load and tipping over rate are calculated with Zero Moment Point. We designed the tipping-over stability criterion algorithm considering the dynamic characteristics to which ZMP theory is applied and discussed the usefulness of the proposed algorithm compared with the moment equilibrium equation through the simulation and the actual test.

• International journal of advanced smart convergence
• /
• 제9권3호
• /
• pp.253-259
• /
• 2020

Most of today's large-scale cloud systems and enterprise data centers are distributing resources to improve scalability and resource utilization. NVMe-over-Fabric protocol allows submitting NVMe commands to a remote NVMe SSD through RDMA (Remote Direct Memory Access) network. It is attracting attention recently because it is possible to construct a disaggregation storage system with low latency through the protocol. However, the current I/O stack of NVMe-over-Fabric has an inefficient structure for maintaining compatibility with the traditional I/O stack. Therefore, in this paper, we propose a new mechanism to reduce I/O latency and CPU overhead by modifying I/O path of NVMe-over-Fabric to pass through legacy block layer. According to the performance evaluation results, the proposed mechanism is able to reduce the I/O latency and CPU overhead by up to 22% and 24% compared to the existing NVMe-over-Fabrics protocol, respectively.

• 한국수정란이식학회지
• /
• 제8권2호
• /
• pp.97-103
• /
• 1993

This study was conducted to determine the main effects of the parity and farrowing season on gestation length and newborn pigs on the basis of the data obtained from 234 litters of Landrace breeds raised at an integrated swine farm in Kyunggy province from January 1991 to December 1992. The results obtained are summarized as follows ; 1. The average gestation length was 115.37 days, and 114.64 days of 8th parity and over was shorter than those of other parities. 2. The averages of litter size and litter size alive per sow were 9.91 and 9.50 heads. The litter size horn at 1st parity was smaller than at other parities, and the litter size in spring was larger than in summer, autumn or winter. 3. The averages of birth weight per litter and pig were 13.53 kg and 1.37 kg. The effect of farrowing season for each litter weight(p<0.01) and pig weight(p<0.05) at birth was significantly higher in spring than other seasons. 4. Incidence of malformation and stillbirth at birth was 4. 10%, and it at 8th parity and over showed the highest rate(7.50%).

• 유체기계공업학회:학술대회논문집
• /
• 유체기계공업학회 2000년도 유체기계 연구개발 발표회 논문집
• /
• pp.373-378
• /
• 2000

The crevice corrosion of local corrosion occur when the gap exist on metal surface. This crevice corrosion happen to region such as flange of pipe, contact part of casing, under gasket and packing, between valve disk and seat of pump etc. Especially The crevice corrosion of mild steel(SS 400) get serious. This paper was studied on the crevice corrosion of SS 400 in fluid environment. In $0\%,\;2\%,\;3.5\%,\;5\% NaCl$ solution, the aspect of the crevice corrosion and polarization behavior under the crevice corrosion was investigated. And Weight loss rate of SS 400 with crevice and non-crevice was measured according to the NaCl concentration. The main results obtained are as follows : 1) Under crevice corrosion, the corrosion potential become less noble as the concentration of NaCl solution increased. 2) The current density under open circuit potential was high drained as concentration of NaCl solution increased by $3.5\%$ but the concentration increased over $3.5\%$, the current density was low drained. 3) The weight loss rate of SS 400 was increased as concentration of NaCl solution Increased by $3.5\%$, but the concentration increased over $3.5\%$, that of SS 400 was decreased. 4) Effect of oxygen for crevice corrosion in the concentration of $3.5\%$ NaCl solution become sensitive than that $0\%$ NaCl solution.

• Macromolecular Research
• /
• 제13권5호
• /
• pp.391-396
• /
• 2005

The polymerization of methyl methacrylate (MMA) was carried out using CuBr/bidentate phosphorus ligand catalyst systems. MMA polymerization with CuBr/phosphine-phosphinidene (PP) exhibited high conversion ($\~80\%$) in 5 h at $90^{\circ}C$ along with a linear increase of ln($[M]_0/[M]$) versus time, indicating constant concentration of the propagating radicals during the polymerization. The molecular weight of the prepared PMMA tended to increase with conversion, suggesting the living polymerization characteristic of the system. On the other hand, a large difference between the measured and theoretical molecular weight and a broad molecular weight distribution were observed, implicating possible incomplete control over the polymerization. This may have been caused by the low deactivation rate constant ($\kappa_{deact}$) of the system. The low $\kappa_{deact}$, would result in irreversible generation of radicals instead of reversible activation/deactivation process of ATRP. Polymerizations performed at different ligand to CuBr ratios and different monomer to initiator ratios did not afford better control over the polymerization, suggesting that the controllability of CuBr/phosphorus ligand system for ATRP is inherently limited.