• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.555-560
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• 2022

In this study, the insertion loss and phase delay according to the multi-layer structure radome parameters were analyzed using the boundary value solution approach, and the multi-layer structure and hexa mesh structures with low-loss electrical characteristics for the Ku-band transmission/reception frequency of 10.7 ~ 14.5 GHz were designed and manufactured. A hexa mesh was applied to minimize radio wave transmission and scattering, which lowered the transmittance refractive index according to the radio incident angle and minimized dielectric loss through high-density foam. Similar to the simulation result, the transmission loss obtained the gain in a specific receiving frequency band, and in the transmission frequency band, an excellent low loss characteristic was obtained with an insertion loss of 0.8dB or less. The results of this study can be used in radio transmission radomes of low-weight, low-cost end-system protection devices.

• Food Quality and Culture
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• 제1권1호
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• pp.46-57
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• 2007

The purpose of the present study was to examine the nutrient intake status of elderly dementia patients. We surveyed the dietary intake of 50 demented elderly patients receiving a regular diet, who were hospitalized in a geriatric hospital in Yongin, Gyeonggi-do. The average age of the subjects was $79.6{\pm}6.5$ for the males and $80.5{\pm}6.3$ for the females. The average heights were $169.5{\pm}6.0\;cm$ (males) and $154.6{\pm}5.2\;cm$ (females), and the average weights were $58.5{\pm}7.4$ (males) and $51.7{\pm}8.9\;kg$ (females). Depending on the type of dementia, the male patients showed significant differences in their intakes of vegetable protein, fiber, total iron, and non-heme iron between the Alzheimer's disease (AD) and the vascular dementia (VD) groups, and the female patients showed significant differences in their intakes of total protein, phosphorus, zinc, and vitamin $B_6$ between the two groups. The male patients showed significant differences in their intakes of animal-source calcium and carotene according to ability to self-feed. According to physical activity, the male patients showed significant differences in vegetable fat and vitamin A intake, and the females showed significant differences in their intakes of total protein, animal protein, fiber, ash, total calcium, vegetable-source calcium, animal-source calcium, phosphorous, total iron, non-heme iron, heme iron, sodium, vitamins $B_1$, $B_2$, $B_6$, niacin, vitamin C, folate, and potassium. We found that the patients consumed excessive protein, but low amounts of calcium, vitamin $B_2$, and folate. Also, the patients' physical activity abilities appeared to affect their nutrient intakes.

• Asian-Australasian Journal of Animal Sciences
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• 제17권12호
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• pp.1652-1656
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• 2004

The aim of this study was to obtain mature ova or embryos at a single cell stage, which can be used in avian transgenesis and nuclear transfer through multiple ovulations, in vitro fertilization and culture. Chicken anterior pituitary extract (CAPE) or acetone-dried chicken anterior pituitary extract (ACAPE) was used to induce multiple ovulations in hens pretreated with pregnant mare' serum gonadotrophin (PMSG). In vitro fertilization of the multiple ovulated ova was performed by inseminating sperm onto the germinal disks in m-Ringer' solution and incubating the ova at 41$^{\circ}C$, 5% $CO_2$ for 10 h in DME-F12 medium containing 20% liquid albumen. The in vitro fertilization process was observed using an environmental scanning electron microscope. When normal laying hens (white Leghorn) were administered daily with PMSG (100 IU), egg laying ceased in most hens within 3 to 8 days. Ovulation began to occur about 7.5 h after injection of CAPE and ACAPE. The number of ovulated ova was 1.00${\pm}$0.00, 2.33${\pm}$0.52 and 2.20${\pm}$0.45, respectively, after receiving 100, 200 and 300 mg CAPE. The number of ovulated ova was 2.00${\pm}$0.00, 2.86${\pm}$0.69 and 3.00${\pm}$1.22, respectively, after receiving 10, 15 and 20 mg ACAPE. The fertilized and cultured ova were able to develop into embryos up to the 32 cell stage. The present experiments demonstrated that multiple ovulations can be induced by CAPE and ACAPE successfully, and the ova resulted from the treatment retained the capability for further fertilization and embryonic development. These data provide new information to support the establishment of an in vitro culture system for future avian transgenesis studies.

• 문화기술의 융합
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• 제9권1호
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• pp.347-353
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• 2023

현재 軍(육군) 입대 장병은 신병훈련소에서 신체에 대한 치수 측정(자동, 수동) 및 샘플 피복을 착용해 본 후, 희망하는 치수로 피복을 지급받고 있다. 하지만, 민간 평상복보다 상대적으로 매우 세분화된 치수 체계를 적용하고 있는 軍에서는 이와 같은 치수 측정 과정에서 발생하는 측정된 치수의 낮은 정확도로 인해 지급받은 피복이 제대로 맞지 않아 피복을 교체하는 빈도가 매우 빈번히 발생하고 있다. 뿐만 아니라 서구적으로 변화된 MZ 세대의 체형변화를 반영하지 않고, 10여 년 전(前)에 수집된 구세대 체형 데이터 기반의 치수 체계를 적용함으로써 재고량이 비효율적으로 관리되는 문제점이 있다. 즉, 필요한 규격의 피복은 부족하고 불필요한 규격의 피복재고는 다수 발생하고 있다. 따라서, 피복 교체빈도를 감소시키고 재고관리의 효율성을 향상하기 위해 딥러닝 기반의 신체 치수 자동측정과 빅데이터 분석 및 머신러닝 기반의 "입대 장병 개인 맞춤형 피복 자동 추천 시스템"을 제안한다.

• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.236-248
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• 2024

This study aims to empirically analyze the effects of leadership level and toxic leadership on leadership performance results among male and female military leaders in the Army, and to verify whether the leader's gender has a moderating effect in this process. Additionally, by comparing and analyzing the leadership level, toxic leadership, and leadership performance results of female military leaders by position, this study seeks to examine the characteristics of female military leadership according to position. The research model was established with leadership level and toxic leadership as independent variables, leadership performance results as the dependent variable, and the leader's gender as a moderating variable. Data were collected through a survey of 216 male and female officers serving in the positions of platoon leader, company commander, and battalion commander in the Army. The collected data were analyzed using descriptive statistics, reliability analysis, correlation analysis, and hierarchical regression analysis. The results showed that leadership level had a significant positive effect on leadership performance results, while toxic leadership had a significant negative effect. The leader's gender moderated the relationship between leadership level and leadership performance results, with female leaders receiving lower evaluations than male leaders at the same level of leadership competency. Gender also moderated the relationship between toxic leadership and leadership performance results, with female leaders exhibiting the same level of toxic leadership receiving lower performance evaluations than male leaders. In the comparative analysis of female military leadership characteristics by position, the leadership level of the platoon leader and company commander groups was not significantly different from that of male soldiers, but the battalion commander group showed slightly lower leadership competency compared to male soldiers. Based on these results, this study suggests ways to improve the leadership level of female military leaders, reduce toxic leadership, and prepare support measures to strengthen the leadership competency of female military officers at the battalion commander level and above from policy, institutional, and educational perspectives.

• Asian-Australasian Journal of Animal Sciences
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• 제15권2호
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• pp.188-194
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• 2002

To study the effect of wheat bran and lactic acid producing bacteria (LAB) on the performance of calves, 20 crossbred male cattle calves (day old), distributed into two groups were fed on calf starters containing 50 or 0% maize grain, along with green berseem ad libitum and milk as per body weight. Each group was further divided into two sub groups and one subgroup of each group was supplemented with mixed culture of LAB (Lactobacillus acidophilus L. casei, L. Jugarti). Milk feeding was discontinued after 8 weeks of age. The addition of culture increased (p<0.05) DM intake in calves receiving grainless diet from eighth week to the thirteenth one. There was about 21% higher body weight gain and 14% lower feed : gain ratio in culture supplemented calves. DM digestibility was significantly lower (p<0.05) in calves getting grain without culture. The crude protein NDF and ADF digestibility was higher (p<0.05) in grainless than the grain fed group. No major change on rumen fermentation pattern among different treatments was found. The concentration of total volatile fatty acids (TVFA) and protozoa count was higher (p<0.05) in grain fed group. However, lactic acid concentration was higher and rumen pH was lower due to culture feeding. The incidence as well as severity of diarrhoea was reduced in culture supplemented group. The results indicate that crossbred calves can be reared successfully on grainless diet and berseen fodder. The performance of calves was also improved by LAB supplementation.

• 한국양식학회지
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• 제13권3호
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• pp.259-265
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• 2000

Four experimental diets were formulated to contain white fish meal (WFM) andvor BAIFA-M as the main animal protein source to determine the optimum BAIFA-M level to replace WFM protein. The diets contained 100% WFM + 0% BAIFA-M in the diet M$_0$ (control) . 70%, WFM+30%, BAIFA-M in the diet M$_{30}$, 55 % WFM+45 % BAIFA-M in the diet M$_{45}$, ; 40 % WFM+60 % BAIFA-M in the diet M$_{60}$. The four groups of rockfish (232 g), receiving the four different diets, were fed for 8 weeks. Groups receiving M$_0$, M$_{30}$ and M$_{45}$/ diets did not show significant (P>0.05) difference in growth and feed efficiency; however, the group fed on M$_{60}$/ showed significantly slower growth and lower feed efficiency than the others. Body composition showed no significant difference among the four dietary groups. WFM protein can be replaced by BAIFA-M up to 45 % in the diet of the rockfish.

• 한국심리학회지 : 문화 및 사회문제
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• 제8권2호
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• pp.105-135
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• 2002

이 연구의 주된 목적은 IMF시대 이후 한국 학생과 부모의 스트레스 경험과 대처양식 및 사회적 지원을 토착심리학적 접근을 통해 분석하는데 있다. 최종분석대상은 1,476명으로서, 학생 634명(초 135명, 중 118명, 고 168명, 대 213명), 부모 842명(부 421명, 모 421명)이었다. 고통스러운 스트레스 경험으로 학생은 학업과 인간관계를, 아버지는 경제적 문제를, 어머니는 가정생활 스트레스를 가장 많이 지적하였다. 가정생활 스트레스에 포함되는 대표적인 내용은 가족관계 갈등과 자녀교육 문제였다. 스트레스 대처방법으로는 학생과 부모 모두 스스로 노력하고 인내하는 자기조절 대처를 가장 많이 하고, 그 다음으로 포기/회피 대처를 많이 하였다. 스트레스 상황에서 도움을 준 사람으로, 학생은 친구를, 부모는 배우자를 중심으로 하는 가족을 가장 많이 지적하였다. 초등학생에서 대학생으로 됨에 따라 사회적 지원의 제공자로서 친구의 중요성이 점차 부각되었다. 과반수 이상의 학생과 부모가, 사회적 지원의 내용으로서 격려와 위로로 대표되는 정서적 도움이 가장 중요하다고 응답하였다. 이러한 정서적 도움은 학업, 인간관계, 가정생활, 경제문제 등 학생과 성인의 대표적인 스트레스 경험에서 일관되게 가장 중요한 것으로 나타났다. 그동안 IMF시대 이전과 IMF지원을 받은 직후에 토착심리학적 접근방법을 통해 연구한 누적된 결과들과 이 연구에서의 결과를 종합하여, 스트레스 경험, 대처양식 및 사회적 지원에 관련하여 한국 사람들이 갖고 있는 사회적 표상을 정리하였다. 이러한 한국 사람의 스트레스 관련 토착심리에 관한 논의를 토대로, 다양한 후속연구의 방향이 모색되었다.

• 한국의류학회지
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• 제30권3호
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• pp.458-469
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• 2006

복식문화교류의 사례분석을 통해 교류가 복식변화의 한 요인임을 밝히고, 나아가 현재와 미래의 복식 변화에 대한 이해를 돕고자 하는 목적을 가지고 본 연구에서는 정치적 요인에 의한 교류를 중심으로 사례분석 하였다. 복식문화교류를 분석할 수 있는 이론을 제시하기 위해 문화교류, 복식문화에 대해 고찰하고, 이를 근거로 전파, 선택, 재해석의 세 단계로 구성된 복식문화교류 과정의 모델을 제시하였다. 제시한 복식문화교류 과정 모델에 근거해 정치적 요인에 의한 복식문화교류 사례 4가지를 분석하였다. 복식이 기호로 표현 가능하다는 것을 정치적으로 이용한 교류는 강제적이거나 반강제적인 경우가 대부분이었다. 침략자들은 자신들의 우위성을 강조하기 위해 자국의 복식을 피전파지에 강제 수용시켰다. 단순한 물질로서의 복식을 이입시킨 것이 아니라 자신들의 가치관과 삶의 방식을 이입시키고자 한 것이다. 결과를 통해 얻을 수 있는 결론은 교류가 복식문화를 변화시키는 중요한 원동력이라는 것이다. 모든 교류가 전파와 수용 방식에 크게 영향 받지 않고 융합이라는 수용의 결과를 얻었으며, 융합은 기존의 복식과 외래의 복식이 서로 건설적인 방향으로 혼합되어 새로운 복식문화를 만들어 나아갔다.

• Tuberculosis and Respiratory Diseases
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• 제42권4호
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• pp.447-454
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• 1995

Cytokine release from alveolar macrophages and subsequent interaction of these cytokines with the bronchial epithelium can induce epithelial cells to release inflammatory mediators. Nitric oxide(NO), a highly reactive gas formed from arginine by nitric oxide synthase(NOS), is known to be involved in inflammation and edema formation, and the inducible form of NOS(iNOS) can be increased by cytokines. In this context, we hypothesized that lung epithelial cells could be stimulated by cytokines released by alveolar macrophages to express iNOS. To test this hypothesis, the murine lung epithelial cell line, LA-4, or the human lung epithelial cell line, A549, were stimulated with culture supernatant fluids from alveolar macrophages. NO production was assessed by evaluating the culture supernatant fluids for nitrite and nitrate, the stable end products of NO. Both murine and human cell culture supernatant fluids demonstrated an increase in nitrite and nitrate which were time- and dose-dependent and attenuated by $TNF{\alpha}$ and IL-$1{\beta}$ antibodies(p<0.05, all comparisons). Consistent with these observations, cytomix a combination of $TNF{\alpha}$, IL-$1{\beta}$, and $\gamma$-interferon, stimulated the lung epithelial cell lines as well as primary cultures of human bronchial epithelial cells to increase their NO production as evidenced by an increase in nitrite and nitrate in their culture supernatant fluids, an increase in the iNOS staining by immunocytochemistry, and an increase in iNOS mRNA by Northern blottin(p<0.05, all comparisons). The cytokine effects on iNOS were all attenuated by dexamethasone. To determine if these in vitro observations are reflected in vivo, exhaled NO was measured and found to be increased in asthmatics not receiving corticosteroids. These data demonstrate that alveolar macrophage derived cytokines increase iNOS expression in lung epithelial cells and that these in vitro observations are mirrored by increased exhaled NO levels in asthmatics. Increased NO in the lung may contribute to edema formation and airway narrowing.