• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.21-24
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• 2005

This study explains the procedure that should be taken to develop a successful wind park project. It Provide guideline for activities and studies to be done step by step solution. This study follow a chronological flow through the development process. They cover Technical consideration, Assessment of Wind Energy Resource, Wind park siting and Energy yield calculation. It's build on the experience gained by the Youngduk Wind Park project and give the playa role in the development of wind energy projects. It is important to understand all theses issues if a new project is to be successfully completed.

• International Journal of Internet, Broadcasting and Communication
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• 제7권1호
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• pp.20-22
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• 2015

Recently, the study of smart phone user habits has become a highly focused topic due to the rapid growth of the smart phone market. Indeed, sequential pattern analysis methods were efficiently used for web-based user habit mining long time ago. However, by means of simulations, it has been observed that these methods might fail for smart phone-based user habit mining. In this paper, we propose a novel approach that leads to a considerably increased performance of the traditional sequential pattern analysis methods by reasonably cutting off each chronological sequence of user logs on a device into shorter ones, which represent the sequential user activities in various periods of a day.

• 대한정형외과학회지
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• 제52권1호
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• pp.73-82
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• 2017

목적: 화학요법만으로 치료한 소아 척추 결핵 환아들에서의 후만의 경시적 변화를 분석하였다. 대상 및 방법: 2세부터 15세 사이의 101명을 대상으로 하여 후향적으로 단순 방사선 영상과 소수에게서 자기공명영상을 이용하여 치료 시작 시와 치료 종결 시의 잔존 성장판에 의한 후만 변형의 변화를 살폈다. 결과: 영상상 초진 시 추간판의 완전 파괴로 판정한 예들은 경추의 경우 40명 중 2명(5.0%), 흉추 내에서는 30명 중 8예(26.7%), 그리고 요천추에서는 31명 중 6명(19.4%)이었다. 나머지 예들에서는 성장판이 완전하게 또는 부분적으로 잔존하는 것으로 판정하였다. 101명 중 후만 변형이 변치 않고 유지된 경우는 20명(19.8%), 후만각 감소 예는 14명(13.9%), 그리고 후만각의 증가 예는 67명(66.3%)에서 관찰되었다. 결론: 반수 이상의 환아에서 치료 시작 시점에서 이미 병이 심히 진행되었던 것을 알 수 있었다. 후만 변형의 진행 여부는 일차적으로 치료 시작 시점에서 예측 가능하나 그 정확도가 떨어지므로 후만 변형의 변화의 보다 정확한 증거를 확인할 수 있는 투약 종료 시점에서 실시할 것을 권한다. 진행형과 자연 교정군에서는 성장 종료 시까지의 추적 관찰이 필요하다.

• 한국지구과학회지
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• 제27권5호
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• pp.521-527
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• 2006

CHIME 연대측정을 위한 전자현미분석(EPMA)에서는 통상적으로 핵 연료 물질 등 구하기 어렵고 관리에 민감한 표준 물질을 사용하므로 이를 구하지 못하는 실험실에서는 적용에 어려움이 있다. 이 연구에서는 이러한 표준 물질을 대신할 수 있는 새로운 실험실 표준법을 제시한다. CHIME 연대 측정이 원활하게 이루어지고 일련의 표준 물질이 잘 구비된 실험실에서 X선 세기가 균질함이 확인된 모나자이트와 같은 광물편을 대상으로 보정 상수를 정확히 구하고, Th, U 등의 특성 X선 세기를 측정해두면, 다른 실험실에서는 단지 광물편의 특성 X선 세기를 측정하는 것만으로 바로 사용할 수 있는 표준 물질로 활용할 수 있다. 이 기법은 전자 현미 분석에서 화학성분과 X선 간섭 보정 계수의 결정에 필요한 표준 물질로 모두 활용이 가능하며, 광물 표준 물질의 복잡한 화학 성분에 대해 독립적이다.

• 말소리와 음성과학
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• 제11권4호
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• pp.9-18
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• 2019

본고는 한국인 피험자를 대상으로 지각 실험을 진행하여 화자의 실제 연령(Chronological age)과 지각 연령(Perceived age) 간의 상관관계를 살피고, 한국인 피험자가 얼마나 정확하게 익명의 화자의 연령을 지각할 수 있는지를 밝히고자 한다. 또한, 이러한 연령 지각에 음성적 단서가 되는 음높이와 발화 속도와 지각 연령 간의 영향 관계를 검토하고자 한다. 이를 위해, 성인 80명을 대상으로 3가지 과제로 구성된 지각 실험을 진행하였다. 실험 자극은 표준어 화자 40명에게서 추출되었으며, 자유 발화, 낭독 발화, 모음 연장 발성으로 구성되었다. 각 실험은 10초 내외의 음성을 듣고 연령을 구체적인 숫자로 답하는 방식으로 진행되었다. 분석 결과, 한국인 피험자들은 상당히 높은 판단 정확도를 보였으며, 모음 연장 발성을 들었을 때보다 자유 발화와 낭독 발화를 들었을 때 화자의 연령을 더욱 정확하게 짐작하였다. 이러한 결과는 음성이 포함하고 있는 정보량의 차이에 기인한 것으로 보인다. 또한, 음성 분석을 수행한 결과 피험자들은 화자의 음높이와 발화 속도를 참고하여 화자의 연령을 추정하는 것으로 나타났으며, 음높이보다는 발화 속도가 연령 지각에 더 적극적으로 기여한 것으로 나타났다.

• 한국실내디자인학회논문집
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• 제33호
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• pp.36-45
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• 2002

The purpose of this study is to investigate the chronological characteristics of the strategy for the house marketing in terms of the apartment lots for sale advertisements appeared to be from 1970's to 1990's in Busan·Kyungnam area. For the analysis of the newspaper advertisement, a new residence environmental indication is introduced to this research as referring to the existing research data. With this indication, therefore, this study is to examine what contents of the advertisements are. Moreover, as analyzing how frequently the advertisements have been inserted in the newspaper, it shows the characteristics which the construction industry has planned for sale of apartment in lots. The results are as follows; First, the frequency of the appearance in the newspaper about each unit and block in an apartment complex has been on the decrease. On the other hand, the importance about the surrounding area has been on the increase during the period. It shows that consumer require more about the surrounding area issues than each unit itself. Second, in the case of the outdoor space in the apartment complex, the frequency of the appearance in the newspaper has been kept a certain levels during the period. It is clear that the consumers have been concerned about the outdoor space throughout the period. Third, the most important issue is the qualify of site location, such as the benefits of the traffic, the levels of the education environment, the natural environment of the apartment complex and so forth. The frequency of the appearance in the newspaper has been kept increasing since 1970's in the advertisement. It clearly shows that this issue has been standardized for purchasing a house.

• Journal of Information Technology Applications and Management
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• 제26권1호
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• pp.21-38
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• 2019

This study starts from the question, "Are people of the age 60 and over equally 'old?' "As the aging population has rapidly become a global issue, it is a timely question to think about whether it is appropriate to classify people aged 60 and over as senior citizens monolithically based on their chronological age. Thanks to the advancement of medical technology and ever-increasing life expectancy, there may be more differences than we thought in terms of cognitive and behavioral patterns among the elderly population. In order to further investigate this question, this study focuses on technology acceptance behavior of 132 participants over the age of 60 towards a wearable healthcare device. The results show that there were interesting behavioral differences among participants depending on their cognitive capabilities. More specifically, participants with high cognitive capability (Superagers) consider the usefulness and the social aspects (social norm and image) of using wearable healthcare technology. Whereas for those with relatively low cognitive capability (non-Superagers), usefulness of using the technology was not a significant factor, and they mainly considered social norm and image. Our findings imply that the current monolithic application of chronological age to classify the elderly population should be carefully reconsidered because people aged over 60 years old may not always share homogeneous cognitive and behavioral patterns.

• 대한치과교정학회지
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• 제52권5호
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• pp.345-353
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• 2022

Objective: To investigate airway volumes using cone-beam computed tomography (CBCT) by skeletal patterns, sex, and cervical vertebral maturation (CVM) stages in Korean adolescents. Methods: The sample consisted of pretreatment CBCT and cephalograms of 95 adolescents (aged 12-19) obtained out of 1,611 patients examined for orthodontic treatment from 2018 to 2020 in Kyungpook National University Dental Hospital. The samples were classified into two sex groups; three skeletal pattern groups, four chronological age groups and four CVM stages. Nasopharyngeal volumes (NPV), oropharyngeal volumes (OPV), total pharyngeal airway volume (TAV) and minimum cross-sectional area (MCA) measurements were taken from the CBCT. Multiple linear regression analyses to find out which one of the independent variables are good predictors for airway variables. Significant factors were analyzed by two-way multivariate analysis of variance (MANOVA) then multiple comparisons were analyzed using a t-test, and Fisher least significant difference. Results: Age, sex, CVM, and Sella-Nasion-B point have significant influence on airway variable. Males and females showed similar patterns of change in chronological age groups 1-3; however, males had larger NPV, OPV, and MCA at CVM in group 4. According to CVM stages, males had larger OPV, TAV, and MCA at CVM stage 6 (p-value: 0.019, 0.021, 0.015, respectively) and no sex differences at CVM stages 3, 4, and 5. Conclusions: Skeletal patterns have an effect on airway volume. Sex differences were found in CVM 6.

• 지역사회간호학회지
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• 제33권3호
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• pp.269-278
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• 2022

Purpose: This study analyzed the retention factors of Korean community health practitioners who sustained over 20 years based on a multi-dimensional framework. This study suggests global implications for nurses working in rural or remote areas, even during a worldwide pandemic. Methods: The participants were 16 Korean community health practitioners who worked in rural or remote locations for over 20 years. This study identified nurses' key retention factors contributing to long service in rural and remote areas. This is a qualitative study based on the narrative method and analysis was conducted using grounded theory. A semi-structured questionnaire was conducted based on the following: the life flow of the participants' first experience, episodes during the work experience, and reflections on the past 20 years. Results: First, personal 'financial needs' and 'callings' were motivation-related causal conditions. The adaptation of environment-work-community was the contextual condition leading to intervening conditions, building coping strategies by encountering a lifetime crisis. The consequences of 'transition' and 'maturation' naturally occurred with chronological changes. The unique factors were related to the 'external changes' in the Korean primary health system, which improved the participants' social status and welfare. Conclusion: Considering multi-dimensional retention factors was critical, including chronological (i.e., historical changes) and external factors (i.e., healthcare systems), to be supportive synchronously for rural nurses. Without this, the individuals working in the rural areas could be victimized by insecurity and self-commitment. Furthermore, considering the global pandemic, the retention of nurses is crucial to prevent the severity of isolation in rural and remote areas.

• 대한치과교정학회지
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• 제53권4호
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• pp.232-240
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• 2023

Objective: This study aimed to evaluate the zygomaticotemporal suture (ZTS) maturation, analyze the age distribution patterns of ZTS maturation stages, and investigate the relationship between ZTS and cervical vertebral maturation (CVM). Methods: A total of 261 patients who underwent cone-beam computed tomography (112 males, mean age, 13.1 ± 3.3 years; 149 females, mean age, 13.7 ± 3.1 years) were examined to evaluate the ZTS stages. The ZTS stages were defined based on a modified method from previous studies on zygomaticomaxillary sutures. Differences between groups and correlations between indicators were analyzed using the Spearman correlation test, intraclass coefficient of correlation (ICC), one-way analysis of variance and rank sum test. Statistical significance was set at p < 0.05. The diagnostic value of CVM stages in identifying ZTS maturation stages was evaluated using positive likelihood ratios (LRs). Results: A positive relationship was found between the ZTS and CVM stage (r = 0.747, ICC = 0.621, p < 0.01) and between the ZTS stage and chronological age (r = 0.727, ICC = 0.330, p < 0.01). Positive LRs > 10 were found for several cervical stages (CSs), including CS1 and CS2 for the diagnosis of stage B, CS1 to CS3 for the diagnosis of stages B and C, and CS6 for the diagnosis of stages D and E. Conclusions: The ZTS maturation stage may be more relevant to the CVM stage than to the chronological age. The CVM stages can be good indicators for clinical decisions regarding maxillary protraction, except for CS4 and CS5.