• 경영정보학연구
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• 제13권3호
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• pp.123-139
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• 2011

본고는 국내 통신상품 결합전략을 도출하기 위해서 각 상품들을 소비자들이 어떻게 평가하는가를 분석하였다. 이를 위해서 각 상품의 가치에 영향을 미치는 다양한 속성을 서비스 특성, 서비스 가격, 그리고 기업이미지로 크게 분류하고 소비자들이 이들 개별상품의 가치를 평가할 때 각 속성들을 중요시하는 정도를 측정하였다. 따라서 본고의 연구주제는 결합되기 이전, 이후의 각사 서비스들의 인지가치 속성별로 기업 및 결합상품에 대해 중요하게 생각하고 있는지 논의하였으며, 마지막으로 통신 3사의 결합 시나리오에 따른 평가와 기업들의 대응 전략 방향에 대해 논의하였다. 결론적으로 각 통신 상품들은 그 구성 상품들의 속성에 따라 소비자들에 의해 다르게 평가되고 있으므로 각 기업들은 자신과 경쟁자들의 소비자 가치의 비교에 의해 자신들의 경쟁력을 극대화하기 위한 결합전략 시나리오를 도출하거나, 자신들의 상품 속성 중에서 가장 시급하게 보완해야하는 부분을 파악할 수 있다. 국내 통신 3사의 사례에서는 B사와 A, C사의 전략에 차별점이 있었으며, A, C사는 기업이미지와 서비스 특성에 대한 소비자의 평가를 향상시키기 위한 노력이 필요한 것으로 나타났다. 또한, 결합상품 확장의 6가지 시나리오분석에서는 전반적으로 A사의 QPS 확장이 가장 유리하였으나, B, C사의 강점을 활용한 DPS의 확장시 순차적인 시나리오로 가합성의 급격한 하락을 방지 할 수 있을 것으로 분석되었다. 상기와 같은 결과는 각 영역에서 고른 지배력을 보유한 기업도 있으나, 특정분야 강점이 있는 기업이 상대적인 약점을 보완하며 순차적인 차별화를 이룰 경우 경쟁력의 강화에 기여할 수 있음을 보여주는 것으로 기존의 연구에 비해 이론적, 실무적 공헌점이 크다고 볼 수 있다. 또한, 소비자들의 평가에 의한 가합성 지수가 각 기업들의 노력에 의해서 변화될 수 있음을 가정할 때 이러한 시나리오 플래닝은 각 상품의 속성별로 각 기업들의 투자와 홍보가 동시에 고려되어야 함을 보여주는 연구 성과라고 할 수 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권3호
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• pp.355-365
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• 2010

The aim of this study was to investigate the effect of supplemental recombinant bovine somatotropin (rbST) and cooling with misters and fans on renal function in relation to regulation of body fluids in different stages of lactation in crossbred Holstein cattle. Ten, 87.5% crossbred Holstein cattle were divided into two groups of 5 animals each, housing in a normal shaded barn (NS) and in a shaded barn with a mister-fans cooling system (MF). The experiment in each group was divided into 3 phases, early- (Day 75 postpartum), mid- (Day 135 postpartum), and late stage of lactation (Day 195 postpartum). The pre-treatment study was conducted on the starting day of each stage of lactation and the treatment study was performed after the end of the pre-treatment, during which the animal was injected with 500 mg of rbST (POSILAC) every 14 days for three times. During the study, ambient temperature at the hottest period daily in the MF barn was significantly lower, while relative humidity was higher than that of the NS barn. The temperature humidity index (THI) in both barns ranged from 79-85 throughout the periods of study. Cows in the MF barn showed a lower rectal temperature and respiration rate as compared with cows in the NS barn. The effect of rbST administration increased both rectal temperature and respiration rates of cows housed in either the NS or MF barn. Milk yield significantly increased in cows treated with rbST in all stages of lactation. Increases in mammary blood flow, accompanied by increases of total body water (TBW), extracellular fluid (ECF), blood volume (BV) and plasma volume (PV), were observed in both groups of cows receiving rbST in all stages of lactation. No alterations of renal blood flow and glomerular filtration rate were observed in cows receiving rbST, but decreases in urinary excretion and fractional excretion of sodium, potassium and chloride ions appeared to correlate with reduction in the rate of urine flow and osmolar clearance during rbST administration. These results suggest that the effect of rbST supplementation to cows housed either in NS or MF barns on body fluid volume expansion is attributable to changes in the rate of electrolyte excretion by the kidney. The increased availability of renal tubular reabsorption of sodium, potassium and chloride ions during rbST treatment was a major factor in retaining body water through its colligative properties in exerting formation of an osmotic force mechanism.

• 대한지역사회영양학회지
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• 제12권6호
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• pp.724-741
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• 2007

This study was carried out to investigate the body weight controls and eating disorders of university students in Gunsan. The subject of the present study included 229 male students (53.8%) and 197 female students (46.2%), totalling 426 students from Kunsan University. The subjects consisted of 56 underweight (13.1%), 265 with normal weight (62.2%), and 105 overweight (24.6%). Especially, in females, 20.8% of them were underweight, which is 6.6% higher than males, showing a significant difference (p<0.001). Regarding body image, 21.8% of the males thought they were fat, while 40.6% of the females thought they were fat. Regarding the perceived body type, shown in the difference between their own size and the ideal size, males recorded 0.03, while females recorded 1.75, showing a major significant difference (p<0.001). Regarding body satisfaction, 33.2% of the males were unsatisfied, while 52.8% of the females were unsatisfied (p<0.001). The social expectations of the male subjects' sizes and weights recorded 2.04, while that of females recorded -2.51, showing that people's opinions expected the female subjects' bodies to be thinner (p<0.001). Additionally, the social expectation of the subjects' weight control recorded an average of 15.22 (13.92 for males, 16.73 for females), showing that the female subjects' felt that people's opinions wished them to lose their weight (p<0.001). Regarding the recognition on weight control, interested males were 49.4%, while interested females were 86.8%, showing the females superior rate (p<0.001). The beliefs in relation to weight control recorded an average of 62.01, with the score of females of 67.89 being significantly higher than that of males which was 56.96. The subjects showed a relatively positive response towards weight control (p<0.001). EAT-26 score was employed to determine the eating attitudes in relation to gender. Here, the final score of males was 15.46, which was significantly lower than that of females, which was 22.21 (p<0.001). Furthermore, regarding the score of eating attitudes in relation to obesity index, the eating disorder scale scores on the questions related to bulimia and diets to lose weight as weight increases were high. However, the eating disorder scale score on oral control, which actually controls food, was low. To control the expansion of excessive weight control attempts and their side effects, the recognition of the students' body types needs to be corrected, and nutrition education programs on eating habits and eating disorders to foster proper weight loss are deemed necessary.

• 한국응용과학기술학회지
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• 제37권2호
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• pp.192-205
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• 2020

본 연구의 목적은 학업 스트레스가 높다고 대답한 우리나라 서울지역 대학생의 자기효능감, 자아존중감 및 삶의 만족도 사이에서 경험적으로 구조적 관계를 검증하는데 있다. 연구의 목적을 달성하기 위하여 SPSS 23.0 및 AMOS 21.0을 사용하였다. SPSS 23.0에서는 인구 통계학적 특성 분석을 위한 빈도 분석, 설문지 척도 간의 다중 공선성을 검증하기 위한 상관관계 분석, 설문지 질문의 신뢰성을 판단하기 위한 신뢰도 검증이 실시되었다. AMOS 21.0에서는 요인간의 구성타당도를 확인하고 변수 간의 인과 관계를 확인하기 위해 확인적 요인 분석을 수행하였다. 모형의 적합도를 확인하기 위해 𝑥² 검정과 적합도 지수를 기본으로 하는 구조방정식 모형을 사용하였다. 연구의 결과는 다음과 같다. 첫째, 높은 학업 스트레스를 가지며 수영 수업을 수강한 대학생의 자기효능감은 자아존중감에 정의 영향을 미치는 것으로 나타났다. 둘째, 높은 학업 스트레스를 가지며 수영 수업을 수강한 대학생의 자기 효능감은 삶의 만족도에 정의 영향을 미치는 것으로 나타났다. 셋째, 높은 학업 스트레스를 가지며 수영 수업을 수강한 대학생의 자아존중감은 삶의 만족도에 정의 영향을 미치는 것으로 나타났다. 이 연구의 결과를 토대로하여 한국 대학생의 학업 스트레스 문제를 해결하고, 더 나아가 우리나라 입시 제도의 사각이라 할 수 있는 체육 교과 문제 해결 방안의 마련에 중요하게 기여할 수 있을 것으로 기대하는 바이다.

• 한국전통조경학회지
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• 제35권3호
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• pp.94-104
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• 2017

본 연구는 문화재청이 2016년도에 지역문화재 활용사업으로 추진하는 살아 숨 쉬는 향교 서원문화재 만들기 사업의 예산지원을 받은 전국 77개 향교 서원문화재 활용 사업을 대상으로 문화재 활용에 대한 이해를 갖고 있는 전문 인력을 중심으로 전문가 현장평가 및 컨설팅과 일반인 모니터링 그리고 관람객 만족도 조사를 진행하였다. 이에 사업의 계획 운영 실적 성과 연차별 특별지표 부문에 종합평가는 모두 양호 수준으로 나타났다. 사업의 종합적인 성과 중 우수한 점으로는 첫째, 지역의 문화재 향유권 신장, 둘째, 지역 내 문화재 활용 인적 네트워크 확대, 셋째, 지역 내 커뮤니티 공간으로 활용, 넷째, 자유학기제 연계 사업을 통한 문화재 활용 교육콘텐츠의 다양화 등이 있었다. 반면 미흡한 점으로는 첫째, 프로그램 품질 저하, 둘째, 사업계획 대비 실행 부족, 셋째, 지자체의 관심 및 참여 미흡, 넷째, 홍보부족, 다섯째, 자유학기제의 경우 지역 문화재 특성이 반영된 교육콘텐츠 부족 등이 있었다. 사업의 발전 방안으로는 첫째, 향교 서원문화재의 특성을 살린 프로그램 개발, 둘째, 외국인 대상 프로그램 개발, 셋째, 전문 인력 양성, 넷째, 홍보 확대, 다섯째, 새로운 강의 기법 개발, 여섯째, 지역 내 열린 공간으로 활용, 일곱째, 공간별 활용 계획, 여덟째, 평가제도 개선, 아홉째, 관람객 의견 반영 강화, 열 번째, 사업별 집중 컨설팅을 제안하였다.

• Imaging Science in Dentistry
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• 제34권2호
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• pp.75-79
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• 2004

Purpose: To compare the proliferation potential of the epithelial cells between unicystic ameloblastoma (UA), dentigerous cyst (DC), and odontogenic keratocyst (OKC) and to correlate this proliferation potential with the radiographic features of these three pathoses. Materials and Methods: Immunohistochemical expression of PCNA, Ki-67, and cytokeratin as a proliferation marker were assessed for 15 cases of UA, 15 cases of DC, and 15 cases of OKC. The degree of immunochemical expression of three proliferation markers were correlated with the radiographic features, especially cortical expansion (negative and positive) and shape of border (scalloped and round). Results: Using PCNA and Ki-67, OKC showed the highest proliferation potential and UA the lowest. Statistically significant differences were found between the OKC and the UA (p < 0.05). However, no statistically significant difference was present according to the radiographic features in all pathoses. Using cytokeratin, there was no significant differences of proliferation potential among three pathoses. Conclusions : OKC epithelium has the most intense proliferation potential, followed by the dentigeous cyst and then unicystic ameloblastoma. There is no significant relation between the radiographic features and the proliferation potential of epithelium of these three pathoses.

• 한국패류학회지
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• 제27권3호
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• pp.181-190
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• 2011

본 연구는 백합과 이매패류인 바지락, Ruditapes philippinarum을 노닐페놀에 노출시켰을 때, 생식 및 조직학적 지표 변화에 대해서 조사하였다. 실험기간은 16주였다. 실험구는 1개의 대조구와 3개의 노닐페놀 노출구인 0.05, 0.1, $0.2 mg\;NP\;L^{-1}$였다. 생식소지수는 암컷의 경우, 대조구보다 노출구에서 더 높았으며, 수컷의 경우, 대조구보다 노출구에서 더 낮았다. 이성생식세포 발현율은 14.56%였으며, 수컷에서의 발현율이 더 높았다. 기관계 가운데 외투막에서 혈림프동의 확장, 내부상피층 자유면에 발달하는 선조연의 탈락과 박리, 점액세포의 변성이 관찰되었다. 아가미에서는 정단섬모와 측면섬모의 부분적 소실, interlamella junction 붕괴, 점액세포의 변성이 확인되었다. 발에서는 상피세포의 증식, 선조연의 소실 및 섬모가 탈락되었다. 지방갈색소 축적은 노닐페놀에 농도 의존적으로 높았다. 본 연구결과 노닐페놀은 바지락의 낮은 생존율과 조직병리학적 변화 및 이성생식세포 발현을 유도하며, 더욱이 생식과 관련하여 estrogenic effector로서 가능성을 확인하였다.

• Geomechanics and Engineering
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• 제19권5호
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• pp.421-434
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• 2019

It is of great significance to study the mechanical properties and failure mechanism of the defected rock for geological engineering. The defected sandstone modeling with power-law distribution of pre-cracks was built in this paper by Particle Flow Code software. Then the mechanical properties of sandstone and the corresponding failure process were meticulously analyzed by changing the power-law index (PLI) and the number of pre-cracks (NPC). The results show that (1) With the increase of the PLI, the proportion of prefabricated long cracks gradually decreases. (2) When the NPC is the same, the uniaxial compressive strength (UCS) of sandstone increases with the PLI; while when the PLI is the same, the UCS decreases with the NPC. (3) The damage model of rock strength is established based on the Mori-Tanaka method, which can be used to better describe the strength evolution of damaged rock. (4) The failure mode of the specimen is closely related to the total length of the pre-crack. As the total length of the pre-crack increases, the failure intensity of the specimen gradually becomes weaker. In addition, for the specimens with the total pre-crack length between 0.2-0.55 m, significant lateral expansion occurred during their failure process. (5) For the specimens with smaller PLI in the pre-peak loading process, the concentration of the force field inside is more serious than that of the specimens with larger PLI.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.183-183
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• 2017

In the early part of rice growth, root volume primarily limits the amount of plant-accessible nitrogen (N). Therefore, knowledge of the root development is important for modeling N uptake of rice. The timing when the volume of rhizosphere cover the whole soil is also important to carry out timely top dressing. However, information about initial root expansion and associated N uptake is limited due to intrinsic technical difficulties in assessing below-ground processes. Some studies, however, showed a close relationship between below-ground root and above-ground leaf development, suggesting a possibility that above-ground attributes could serve as surrogates for the root processes. In this study, we investigated the relationship between below-ground and above-ground development of rice. Field experiments were conducted where we cultivated Koshihikari (a leading cultivar in Japan) for four different cropping schedules in 2012. In 2016, Gimbozu (HEG4) and three flowering time mutant lines of Gimbozu (X61 (se13), HS276 (ef7), DMG9 (se13, ef7)) were examined for a single season. Experiments were performed with three replications in a completely randomized design. We monitored ammonium-N concentration ([NH4+-N]) in soil solution by repeatedly taking samples from a porous tubing (10-cm long) vertically inserted at the most distant point from surrounding rice hills. Samples were taken in triplicate (= triplicate tubes) and every three days from transplanting in each experimental unit. For above-ground attributes, leaf area index (LAI) was measured in 2012, whereas soil coverage ratio was estimated by image processing in 2016. Results showed that [NH4+-N] increased gradually after transplanting and then rapidly decreased from a certain day. This distinct drop in [NH4+-N] informed us the timing at which the rice root system reached the point of porous tubing and thus essentially covered the whole soil volume. The LAI at the dropping point was about 0.43 regardless of the cropping schedules in 2012 experiment. In 2016, the coverage ratio at the N dropping point was within the range of 0.12 to 0.19 for four genotypes having different growth durations. In addition, the coverage ratios at seven weeks after the transplanting showed a good correspondence to LAI across the four genotypes. We therefore conclude that both LAI and coverage ratio may serve as robust indicators for root development and might be useful to estimate the timing when the root system fully cover the soil volume. Results obtained here will also contribute to develop models that can predict not only above-ground canopy development but also associated below-ground processes.

• Archives of Plastic Surgery
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• 제38권3호
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• pp.295-299
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• 2011

Purpose: It is generally believed that alopecia is caused by various factors such as scars, stress, genetical factors, androgens, etc. Androgenic alopecia is one of the most common cause of alopecia and found mainly in males. Propecia (Merck & Co., USA) and Minoxidil (McNEIL-PPC, Inc, USA) were the drugs approved from FDA for treatment of androgenic alopecia. Surgical treatments such as flap, tissue expansion, scalp reduction and hair transplantation can be considered if necessary. Hair micrograft techniques were developed for natural hair shapes and minimal adverse effect. There were attempts to measure the length of the forehead of the Korean young adults. However attempts to classify the shape and location of forehead hairline were rare. This study attempted to find out standard hairlines of young adults in their 20s & 30s and the result would be the guideline of the hairline in hair replacement surgery of male patients in their 40s & 50s. Methods: 200 male adults in 20s and 30s were photographed and measured the length of 11 vertical index lines to determine hairline. The indexes are the distances from hairline to intercanthal midpoint (A), to medial canthus (B), to upper eyelid fissure (C), to lower eyelid fissure (D), to lateral canthus (E) and distance from lateral highest point to medial lowest point, if the hairline is M-shape (F). Additionally, we classified the hairlines into 4 groups, M, horizontal, inverted U and irregular shapes. Results: The most common hairline of male adults in their 20s is inverted U-shape (53.3%), followed by horizontal-shape, M-shape, irregular-shape. In their 30s, inverted U-shape (59%) is followed by irregular-shape, M-shape, horizontal-shape. The M-shape is more frequently found in males in 30s than those in 20s. The mean values of the indexes in their 20s are as follows: A (76.14 mm), B (Rt: 75.78 mm, Lt:76.41 mm), C (Rt: 69.43 mm, Lt: 69.92 mm), D (Rt: 76.92 mm, Lt:77.46 mm), E (Rt: 64.16 mm, Lt: 64.73 mm), F (4.09 mm). Those in their 30s are as follows: A (76.13 mm), B (Rt: 76.114 mm, Lt: 76.02 mm), C (Rt: 69.87 mm, Lt: 70.37 mm), D (Rt: 77.37 mm, Lt: 77.58 mm), E (Rt: 69.63 mm, Lt: 69.85 mm), F (6.14 mm). Conclusion: The knowledge about human body measurement is indispensable to plastic surgeons. In this study, inverted U shape is the most common type of hairline in 30s, and similar distribution is found in 20s. The percentage of M shape in their 30s is elevated more than 10% compared to that in their 20s. The study of hairline shapes and 11 indexes of hairlines can be useful for planning of the hair transplantation and postoperative evaluation. This study being based on photogrammetry, there may be differences between actual distance of curved face and projected distance on flat photographs.