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이준세,최진국 한국항공운항학회 2019 한국항공운항학회지 Vol.27 No.4
EPTA(English Proficiency Test for Aviation) was not very aviation realistic test before2019. Testee needed pass listening test first. Then testee could take speaking test. There were20sets of speaking test. If the testee memorize well, he or she could pass the test easilyeven though he or she was not very good at English. So the pilot and the authority agreedto change the format of EPTA since 2016. Through development of new EPTA format, theKorea Transportation Safety Authority started new EPTA test since January, 2019. It hasbeen one year since the new format of EPTA started. Now I try to survey satisfaction ofnew EPTA through questionnaire.
이준세,서길웅 충남대학교 농과대학 2003 논문집 Vol.- No.9
지금까지 살펴본바 사슴의 권역별 기후대에 따른 분포와 사슴의 종별 그리고 생육방법 등을 알아보았다. 국내의 사슴 사육농가가 갈수록 많이 늘고 있는 추세이므로 관상용 혹은 식품으로서의 사슴 사육이 권장되고 훌륭한 수입원이 되었으면 하는 바램이다. 다양한 사슴종이 있으나 국내에선 주로 꽃사슴과 엘크사슴의 사육이 주종을 이루고 있어서 본 논문의 내용이 참고가 되어 전업 축산농가에 보탬이 되고, 열악한 국내 축산농업기반을 다져 친 환경적인 우리네 산업으로 자리매김했으면 한다.
이준세,최진국,강민정,전호성 한국항공운항학회 2019 한국항공운항학회지 Vol.27 No.3
Pilot has been fighting to get over fatigue during flight and thought it as a hinderance for safe flight. The fatigue related problem has been the biggest obstacle for aviation safety so far. Even though pilots and airlines try their best to overcome fatigue during flight, they couldn’t overcome this problem. So the airliners let the pilot sleep during flight if pilots are too tired with the report. It is controlled rest used and managed by several European airliners. So this study tries to get Korean airline pilots’ fatigue information and figure out the cause and reduce it.
고등학교 1학년 학생들의 변수 개념에 관한 이해도 조사
이중권,이준세 동국대학교 자연과학연구원 2008 자연과학연구 논문집 Vol.9 No.-
The purpose of this study is to investigate understanding ability of high school first grade students in the variable concepts. For this, following questions were established. ? What level is understanding ability of high school first grade students in the variable concepts? ? What is interrelation between the variable concepts that high school first grade students are understanding? To solve the problems above, we selected 120 high school first graders from a high school located in the D city. We created a test used in this study on the basis of questionnaires (Kim, 1992) that was established to study understanding ability of students in the variable concepts based on various theories from conceptual analysis of variables. For the result analysis, we categorized question into four ranging from first step to fourth step, and recorded the percentage of correct answers, the percentage of wrong answers and the percentage of blank answers for each question. In addition, to understand correlation between question categories, we added one point for a correct answer and none for a wrong/blank answer, and then we encoded the total; then we calculated Pearson correlation coefficient by using SPSS/PC+ for analysis of the encoded total. We earned the following conclusion by the study results. The purpose of this study is to explore what level understanding ability of high school first graders in the variable concepts is and what interrelationship the variable concepts has. As a result of this study, we could reach the following conclusion. First, students failed to understand the various types and meaning of variables in algebraic expressions. Majority of students recognized variable as ?changing number?, but the students failed to recognize variables in the algebraic expressions. Especially, students had a difficulty in understanding indeterminate as in generalized algebraic expressions. Second, students understood randomness of variable symbols in sets and functions in general. As a result of comparison to previous studies, the special feature from conclusion appearing from the second question category was a big difference in randomness of variable symbols in sets because high school first graders review the concept of a set in the beginning so that they are assumed to have more knowledge in sets compared to middle school third graders. Third, students showed decreased ability in interpreting the meaning of variables, but they showed a great performance in calculating expressions of characters with simple knowledge. For example, they were very tactful in using and expressing variables in the case that the corresponding expression used variables or in the simple sentence without characters. However, students have shown 45% in the percentage of the right answer for the problem asking if characters can be dealt as generalized numbers or variables. Fourth, there were positive correlation between the variable concepts for students.
확률기하학을 이용한 LoRa 기반의 저궤도 위성네트워크 가시성과 연결성 분석
정수엽,유준규,이준세 한국통신학회 2024 韓國通信學會論文誌 Vol.49 No.1
Various applications through Low-Earth Orbit (LEO) satellite networks are considered in next-generation communication. Especially, IoT services using the broad coverage of low-orbit satellite networks have been widely considered in many areas. Long Range (LoRa) is an essential technique to compensate for the Doppler effect due to the fast mobility of LEO satellites or to support low-power communication for IoT services. This paper analyzes the visibility and connectivity of the network viewed from the user's perspective on the ground when the LoRa technique is applied to LEO satellite networks. We assume that the spreading factor, an essential physical layer parameter for LoRa-based communication, is determined based on the distance from the user. Then, we present analyses of the network environment experienced by the user using stochastic geometry. The main results provide intuitions on the interrelationship between network parameters and performances. Finally, we present some numerical results which verify that our analyses are consistent with the simulations.