• 한국식품조리과학회지
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• 제26권5호
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• pp.559-566
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• 2010

This study was performed to confirm of characteristics of Sulgidduk containing different amounts of black garlic extract: 0% (T0), 1% (T1), 5% (T5), 10% (T10) or 15% (T15). Samples were analyzed for their physicochemical characteristics and antioxidant activities. According to the results, increasing the level of black garlic extract in the formulation caused the moisture contents of the sample to decrease (38.66~36.79%). Additionally, the L value decreased while the a and b values increased as the contents of black garlic extract in sample increased. Analysis of the texture of Sulgidduk containing different amounts of black garlic extract, found that hardness, gumminess, and adhesiveness decreased, whereas springiness increased; cohesiveness and chewiness did not significantly change. The antioxidant activities of Sulgidduk containing different amounts of black garlic extract were evaluated by measuring 1,1-diphenyl-2-picrylhydrazyl (DPPH) and, 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid (ABTS) radical scavenging activities. In these assays, the Sulgidduk containing different amounts of black garlic extract presented significant radical scavenging activities in a dose-dependent manner.

• Journal of Biosystems Engineering
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• 제20권4호
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• pp.323-332
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• 1995

The horizontal compression test of some selected corrugated fiberboards was performed to determine the cushioning properties of them. Creep behavior of the corrugated fiberboard boxes, which have been widely used in rural area for packaging fruits and vegetables, was tested. The flute crushing stress of the corrugated fiberboard depended upon mainly the basic weight of the corrugated medium, comparing with the combined basic weight of corrugated fiberboard. When moisture content of the corrugated fiberboards was increased about 8% (d.b.), the flute crushing stress of them was decreased at the rate of 44%~64%. The cushion factor of the sample fiberboards showed much higher value at the lower moisture content of them. These trends appeared to be more obvious at the lower applied stress levels. Also, the cushion factors of the double wall corrugated fiberboards(DW) were observed to be little higher than those of the single wall corrugated fiberboards(SW). The creep behavior of the sample boxes was found to be highly moisture and static load dependent. The creep behavior of the corrugated fiberboard boxes could be well analyzed by the asymptotic slope derived from the creep model.

• 한국농공학회논문집
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• 제55권5호
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• pp.9-16
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• 2013

This study finds the characteristics of long-term settlement of Bottom Ash and to review the application of Singh-Mitchell creep equation and Burgers Model to the creep behavior of Bottom Ash. In the undrained state, it was confirmed that creep behavior appeared in the range to 30-80 % of the maximum deviator stress by applying condition in other three stresses through triaxial compression test after isotropically consolidation. By using sieve analysis, it was compared to each sample that was passed through 9.5 mm, 2 mm, 0.25 mm sieves. Also, using Singh-Mitchell creep equation and Burgers Model, it was compared between the theoretical behavior and the observed behavior for each sample. In the result, it is found that creep behavior of Bottom Ash is similar to the theoretical behavior of Singh-Mitchell creep equation and Burgers Model in early stage and it is possible to predict creep behavior of Bottom Ash by these models.

• 한국생활과학회지
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• 제21권6호
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• pp.1211-1222
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• 2012

This research studied the effects of Backryeoncho (Opuntia ficus-indica var. saboten) extract as an additive in kimchi in various amounts (0%, 0.4%, 0.8%, 1.2%), and its acceptance by middle school students in the Jeonju area. The treated kimchi had a higher pH than the untreated kimchi without extract, and the titratable acidity of the kimchi decreased with the addition of the Backryeoncho extract. The degree of salinity decreased in kimchi with the added Backryeoncho extract in a dose-dependent manner. The cutting force and compression force were higher in kimchi where the extract was added during the fermentation period resulting in improved texture of the kimchi. The addition of the extract slowed growth of total bacteria (1.83~2.12 log CFU/mL) and lactic acid bacteria (1.4 log CFU/mL) as compared with the control sample. In the sensory evaluation of overall taste, kimchi with 0.8% extract added demonstrated higher evaluation in overall categories. The acceptability of Backryeoncho extract as an additive in kimchi among middle school students was higher than in the control sample, with an optimum additive of 0.4% extract, based on the lowest volume of leftovers.

• Advanced Composite Materials
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• 제16권3호
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• pp.245-258
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• 2007

The single-modal Weibull model has been assessed on Tyranno ZMI Si-Zr-C-O fiber if a set of shape and scale parameters accurately reproduced the effect of the size of the diameter on strength. The tensile data of a single fiber have been divided into two expedient groups as 'small diameter' group and 'large diameter' group in deriving the parameters, which should be consistent if the Weibull model accurately reproduced the size effect. However, the derived Weibull parameters were inconsistent between the two groups. Thereby the authors have concluded that the parameters of the single-modal Weibull model are dependent on the fiber diameter, so that the model is inadequate to reproduce the strength size effect. On the other hand, Weibull parameters were found consistent between the two groups by excluding the data of 'large mirror zone' sample, which was defined as the sample around 10% mirror zone area of the fracture surface. What is more, the exclusion reduced the strength variance more drastically in the 'large diameter' group than in the 'small diameter' group, even though the 'large mirror zone' samples were found identical in the percentage between the two groups. The authors therefore conclude that diameter limitation to the 'small diameter' group level can lead to drastically less distributed strength values than the estimated strength through the Weibull scaling on the present Tyranno ZMI Si-Zr-C-O fiber.

• 대한간호학회지
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• 제28권3호
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• pp.625-637
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• 1998

To determine factors affecting self-care behavior of diabetics, the relationships of hardiness, family support, demographic and medical variables to self-care behavior were investigated in 180 samples with non-insulin dependent diabetes mellitus. In stepwise multiple regression analysis, 26.76% of the variance in self-care behavior was accounted for by family support(15.52%), age(7.76%), and clinical history (2.07%). To compare the magnitude of predictor's significance by gender, stepwise multiple regression was conducted seperatively by gender group. In the male sample 25.22% of the variance in self-care behavior was accounted for by family support, age, and challenge. In the female sample family support, age, and committment were significant predictors in self-care behavior with 28.82% of the variance. The results highlight the value of family support in self-care behavior in diabetics regardless of gender difference. According to the finding of this study, family support is the most significant predictor of self-care behavior in NIDDM. This implicates that in future diabetic care, a family member should be encouraged to participate in the patient education process. Also as hardiness is not supported by a unidimensional construct, more empirical studies are recommended to differentiate the conceptual traits for the three subconcepts of hardiness.

• 한국자기학회지
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• 제1권2호
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• pp.55-59
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• 1991

희토류-3d 천이원소인 비정질${[{(Fe_{80}CO_{20})}_{0.98}RE_{0.02}]}_{80}B_{20}(RE=Nd,\;Sm,\;Gd,\;Tb)$ 합금 리본시료에 대한 자기적 성질을 조사하기 위하여 시료진동형 자력계(vibrating sample magnetometor)를 이용하여 77 K부터 900 K까지의 온도 영역에서 포화자화 값을 온도의 함수로 측정 한후, Curie 온도 ($T_{c}$)와 Bloch 상수등을 추정하였다. 이들로 부터 spin wave stiffness 상수, 교환상호작용(exchange interaction)의 범위와 평균자승거리($$)등을 계산하였으며 각 희토류 원소에 대한 치환효과를 비교 분석하였다.

• Carbon letters
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• 제7권3호
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• pp.196-200
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• 2006

Graphite has hexagonal closed packing structure with two bonding characteristics of van der Waals bonding between the carbon layers at c axis, and covalent bonding in the carbon layer at a and b axis. Graphite has high tolerant to the extreme conditions of high temperature and neutron irradiations rather than any other materials of metals and ceramics. However, carbon elements easily react with oxygen at as low as 400C. Considering the increasing production of today of hydrogen and electricity with a nuclear reactor, study of oxidation characteristics of graphite is very important, and essential for the life evaluation and design of the nuclear reactor. Since the oxidation behaviors of graphite are dependent on the shapes of testing specimen, critical care is required for evaluation of nuclear reactor graphite materials. In this work, oxidation rate and amounts of the isotropic graphite (IG-110, Toyo Carbon), currently being used for the Koran nuclear reactor, are investigated at various temperature. Oxidation process or principle of graphite was figured out by measuring the oxidation rate, and relation between oxidation rate and sample shape are understood. In the oxidation process, shape effect of volume, surface area, and surface to volume ratio are investigated at $600^{\circ}C$, based on the sample of ASTM C 1179-91.

• 한국간호교육학회지
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• 제10권2호
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• pp.252-261
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• 2004

Purpose: This study attempts to develop the basic data of Constipation reduction program for institutionalized elderly by surveying the constipation and the ADL (Activities of Daily Living) of them. Method: Data are collected by nurses caring for four hundreds five institutionalized elderly during May through July in 2004. Questionnaire contains a bowel assessment, constipation control intervention, and ADL. Result: The constipation rate was found to be 43%. The 82.5% of the study sample was treated with laxatives, and a 59.9% of the sample was practicing enema. The average score of the ADL was 38.32(range: 0 - 100). According to surveying on the ADL in relation to the function of the constipation, ADL is found to be higher in the non-constipation group than the constipation group (t=-2.786, p=.006). Conclusions: The institutionalized elderly tended to have a high rate of constipation. The elderly having constipation was almost dependent on laxatives and enema for relaxing constipation. The high rate of constipation was related to the low performance of the ADL.

• 한국수학교육학회지시리즈A:수학교육
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• 제45권3호
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• pp.251-262
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• 2006

This study investigates 628 high school students' math dislike tendencies by their math achievement levels. The findings show that, firstly, as the sample students' math achievement level decreases, the number of dislike factors increase. Secondly, students' math dislike factors are differentiated by their math achievement levels. Math high achievers show high math disliking tendency by teacher factor. Middle achievers show high math disliking tendency by complex application and relation factors. Low achievers show high math disliking tendency by comprehension factor. Finally the math disliking factors affecting the level of math achievement are influenced by schools and grades that students' attend. While math disliking factors such as comprehension factor, teacher factor, affection factor are generally present among sample schools, exceptionally JS high school students(high achieving students) are only affected by mentality factor. In addition, mentality factor affects the second grade students only. The implications of the study argue that students' math disliking tendencies could be systematically reduced by paying attention to such dependent variables students' achievement levels, grade, school characteristics, and independent variables including teacher, application, mentality, comprehension, and affection.