• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권6호
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• pp.2513-2533
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• 2018

In cognitive radio technology, the overall efficiency of communications systems can be improved without allocating additional bands by allowing a secondary system to utilize the licensed band when the primary system, which has the right to use the band, does not use it. In this paper, we propose a fast and reliable common channel initialization protocol without any exchange of initialization messages between the cluster head and the member nodes in cognitive ad-hoc networks. In the proposed method, the cluster and member nodes perform channel-based spectrum sensing. After sensing, the cluster head transmits a system activation signal through its available channels with a predetermined angle difference pattern. To detect the cluster head's transmission channels and to join the cluster, each member node implements fast Fourier transform (FFT) and computes autocorrelation for the angle difference sequence of the received signal patterns. This is compared to the predetermined reference angle difference pattern. The join-request and channel-decision procedures are presented in this paper. Performance evaluation of the proposed method is presented in the simulation results.

• International Journal of Computer Science & Network Security
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• 제22권4호
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• pp.111-118
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• 2022

This research article presents the work that is related to the application of different machine learning based similarity techniques on religious text for identifying similarities and differences among its various translations. The dataset includes 10 different English translations of verses (Arabic: Ayah) of two Surahs (chapters) namely, Al-Humazah and An-Nasr. The quantitative similarity values for different translations for the same verse were calculated by using the cosine similarity and semantic similarity. The corpus went through two series of experiments: before pre-processing and after pre-processing. In order to determine the performance of machine learning based similarities, human annotated similarities between translations of two Surahs (chapters) namely Al-Humazah and An-Nasr were recorded to construct the ground truth. The average difference between the human annotated similarity and the cosine similarity for Surah (chapter) Al-Humazah was found to be 1.38 per verse (ayah) per pair of translation. After pre-processing, the average difference increased to 2.24. Moreover, the average difference between human annotated similarity and semantic similarity for Surah (chapter) Al-Humazah was found to be 0.09 per verse (Ayah) per pair of translation. After pre-processing, it increased to 0.78. For the Surah (chapter) An-Nasr, before preprocessing, the average difference between human annotated similarity and cosine similarity was found to be 1.93 per verse (Ayah), per pair of translation. And. After pre-processing, the average difference further increased to 2.47. The average difference between the human annotated similarity and the semantic similarity for Surah An-Nasr before preprocessing was found to be 0.93 and after pre-processing, it was reduced to 0.87 per verse (ayah) per pair of translation. The results showed that as expected, the semantic similarity was proven to be better measurement indicator for calculation of the word meaning.

• Journal of applied mathematics & informatics
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• 제36권3_4호
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• pp.271-283
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• 2018

In this paper, we introduce various first order (p, q)-difference equations. We investigate solutions to equations which are linear (p, q)-difference equations and nonlinear (p, q)-difference equations. We also find some properties of (p, q)-calculus, exponential functions, and inverse function.

• 한국환경복원기술학회지
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• 제22권6호
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• pp.27-39
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• 2019

The object of this research is to compare zoology and botany name caused by language and science differences of South and North Korea since division. Biological data are collected North Korea biological information (flora and fauna, an illustrated flora and fauna book of North Korea, Etc.) and compared both side data based on national species list of korea, National Institute of Biological Resources. We could built 3,903 species of flora and 1,487 species flora on biological database. The criteria for comparative method is 5 types (korean name difference, scientific name difference, same species, similar species, North Korea endemic species). As a results, plants were identified korean name difference (911 species), scientific name difference (614 species), same species (880 species), North Korea endemic species (1,037 species) of 3,903 species, and animals were korean name difference (685 species), scientific name difference (104 species), same species (199 species), North Korea endemic species (226 species) of the 1,492 species. This results are expected to be in application with cooperation study for recovering bioinformatics differences of South and North Korea.

• 경영과정보연구
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• 제32권2호
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• pp.47-58
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• 2013

본 연구는 부산에 소재하는 한 대학병원의 건강검진센터에서 건강검진을 받은 이용자들의 검진금액에 대해 성별, 연령별, 지역별로 차이가 있는지를 분석하였으며 그 결과는 다음과 같이 요약할 수 있다. 첫째, 성별 분석의 경우 남성과 여성간의 검진금액에는 차이가 없는 것으로 나타났다. 둘째, 연령별 분석의 경우 50 60대의 연령군이 건강검진을 위해 가장 많은 금액을 지불하고 있는 것으로 나타났으며, 사후 검증과 집단별 검증을 추가로 한 결과 30대 미만과 30대 그리고 60대와 70대 이상의 연령군을 제외한 연령군에서 유의적인 차이를 보였으며, 집단별로는 40대 미만집단, 40대 집단 50대 이상 집단의 3개 집단 간 유의적이 차이를 보여 검진금액에 대한 연령집단군별 차이가 있는 것으로 나타났다. 셋째, 검진금액에 대한 지역별 차이분석에 대한 사후 검증 결과 부산과 울산 경남 지역만 통계적으로 유의한 차이를 보여주었을 뿐 나머지 지역 간에는 통계적으로 유의한 차이를 제시하지 못하였다. 이러한 연구 결과는 의료기관의 건강검진 센터의 효율적 운영에 대한 기초적 정보를 제공할 수 있을 것이다.

• 정보관리학회지
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• 제22권3호
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• pp.379-408
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• 2005

본 연구는 광복이후 최근 60년간 발표된 우리나라문헌정보학 논문의 주제 및 간행시기별 분포를 조사하고, 이곳에 인용된 외국 문헌정보학 문헌의 주제 및 인용시기별 분포와 그 반감기를 조사함과 동시에 타 학문 분야와의 관련성을 추적함으로써 우리나라 문헌정보학 연구의 동향 및 문헌정보학과 타 학문 분야와의 연계성을 밝히고자 하였다. 그 결과 첫째, 우리나라 문헌정보학 연구의 핵심 주제는 시간의 흐름에 따라 주된 연구 주제가 출현하고 쇠퇴하며, 논문의 주제와 간행시기 사이에 상관성이 있음을 입증하였다. 둘째, 피인용 외국 문헌정보학 문헌의 주제는 인용시기 간에 상관성이 존재하며, 반감기는 평균 10년 미만이지만 주제에 따라 그 반감기에 차이가 있음을 밝혔다. 셋째, 피인용 타 학문 분야문헌의 주제는 인용시기 사이에 상관성이 있으며, 반감기는 평균 10년 미만이지만 주제에 따라 그 반감기에 차이가 있음을 밝혔다.

• 의료커뮤니케이션
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• 제13권2호
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• pp.233-241
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• 2018

Purpose: The purpose of this study was to investigate effects of providing written information for coronary artery disease on health behavior compliance related self-efficacy, knowledge of disease, anxiety, and educational satisfaction depending on patients' health literacy. Methods: The participants in this study were 40 patients who underwent coronary angiography or coronary intervention, and depending on the level of health literacy 30 patients were high group and 10 patients were low group. Each group was evaluated on health behavior compliance related self-efficacy, knowledge of disease, anxiety, and educational satisfaction with providing written information. Results: By providing written information in the group with high health literacy, there was a significant difference in health behavior compliance related self-efficacy, knowledge of disease, but there was no significant difference in anxiety variable. On the other hand, there was no significant difference in health behavior compliance related self-efficacy, knowledge of disease, and anxiety by providing written information in the group with low health literacy. Also, there was no significant difference in the educational satisfaction between high and low group of health literacy after providing written information. Conclusion: It is necessary to develop educational materials that can be applied to clinical nursing field with considering health literacy of patients with coronary artery disease. In addition to providing written information, it is also necessary to develop other educational intervention programs such as video and personalized counseling that may be helpful for coronary patients with low health literacy and investigate their effectiveness.

• 한국병원경영학회지
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• 제7권2호
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• pp.80-98
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• 2002

The purpose of this study was to investigate user satisfaction at Defense Medical Information System as it has been utilized as a part of National Defense Information Strategies since Aug. 2000. The subjects of this study were nurse officers and army surgeons of a hospital with 1,000 beds. The results of this study are as follows; First, according to the characteristics of the subjects, there was statistically significant difference in system satisfaction, job satisfaction and information satisfaction at Military Hospital Information System. Second, according to the intention of participation, there was a statistically significant difference in user satisfaction at Military Hospital Information System. Third, according to a level of dexterity at Military Hospital Information System, there was statistically significant difference only in job satisfaction. Fourth, factors to influence system satisfaction were one's duty, using period of Military Hospital Information System, and a level of dexterity at Military Hospital Information System. Factors to influence job satisfaction were a level of dexterity at Military Hospital Information System, one's duty and intention of participation. Factors to influence information satisfaction were one's duty, a level of dexterity at Military Hospital Information System, and intention of participation. As the first study on user satisfaction at Military Hospital Information System, this study suggests the followings. First, a plan to inspire users with intention of participating in information system should be prepared. Second, it is necessary to provide policy activities for job standardization of Military Hospital Information System and legal system improvement.

• 한국통신학회논문지
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• 제41권11호
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• pp.1463-1471
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• 2016

본 논문에서는 Wi-Fi환경에서 실내 위치추정의 성능 향상을 위해 이동 Wi-Fi 환경에서 핑거프린트 기반의 Difference Means를 이용한 실내 위치추정 알고리즘 (Algorithm using the Difference Means based on Fingerprint, DMFPA)을 제안하였다. 그리고 자체 개발한 실내 위치추정 시뮬레이터를 사용하여 제안한 DMFPA의 성능을 일반적인 핑거프린트 알고리즘 (OFPA), 가우시안 분포를 핑거프린트 알고리즘 (GDFPA)의 성능을 서로 비교하였다. 성능분석 항목은 각 참조구역에서의 평균위치추정 정확도, 발생된 오차의 평균오차 누적거리와 최대오차 누적거리, 그리고 평균측정시간으로 정의하였다.

• 한국정보통신학회논문지
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• 제7권4호
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• pp.758-766
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• 2003

본 논문에서는 효율적인 비디오 데이터베이스를 구축하기 위하여 카메라와 객체 파라미터를 이용한 트리-기반 계층형 영상 모자이크 시스템을 제시한다. 장면 전환 검출을 위하여 그레이-레벨 히스토그램 차이와 평균 명암도 차이를 이용한 방법을 제시하였다. 카메라 파라미터는 최소 사각형 오류 기법과 어파인 모델을 이용하여 측정하고, 두 입력 영상의 유사성을 측정하기 위하여 차영상을 이용한다. 또한 동적 객체는 매크로 블록 설정에 의하여 검색되고 영역 분할과 4-분할 탐색에 의하여 추출한다. 동적 객체의 표현은 동적 궤도 평가 함수에 의하여 수행되고 블러링을 통하여 부드럽고 완만한 모자이크 영상을 구축한다.