• 제목/요약/키워드: High-frequency interchange

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다중 스펙트럼 객체 감지를 위한 고주파 교환 네트워크 (High-Frequency Interchange Network for Multispectral Object Detection)

  • 박선후;윤준석;유석봉;한승회
    • 한국정보통신학회논문지
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    • 제26권8호
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    • pp.1121-1129
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    • 2022
  • RGB 이미지를 활용하는 다양한 객체 인식 분야에서 조도가 어둡거나 특정 물체에 의해 가려진 환경에서의 RGB 이미지는 객체 인식 성능 저하를 일으킨다. IR 이미지는 가시광선이 아닌 적외선 파동을 감지하기 때문에 이러한 환경에서 강인한 객체 인식 성능을 가질 수 있고, RGB-IR 이미지 쌍을 가지고 각자의 강점을 결합 하는 것을 통해 객체 인식 성능을 향상시킬 수 있다. 본 논문에서는 RGB-IR 이미지 쌍의 강점만을 결합하여 객체 인식 성능을 향상시키는 다중 스펙트럼 융합 모델인 high-frequency interchange network (HINet)을 제안한다. HINet은 RGB-IR 이미지 간 주요 정보를 교환하기 위해 두 가지 객체 인식 모델을 mutual high-frequency transfer (MHT)를 이용하여 연결하였다. MHT에서는 RGB-IR 이미지 쌍 각각을 discrete cosine transform (DCT) 스펙트럼 도메인으로 변환하여 고주파 정보를 추출한다. 추출된 고주파 정보는 서로의 네트워크에 전달되어 객체 인식성능 향상을 위해 활용되어 진다. 실험 결과는 제안하는 네트워크의 우수성을 보이며 다중 스펙트럼 객체 인식 성능을 향상시키는 것을 확인할 수 있다.

농촌노인의 사회적 지원망에 관한연구 (A Study About Social Support Network of the Rural Elderly)

  • 서병숙;김유정
    • 가정과삶의질연구
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    • 제11권1호
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    • pp.80-92
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    • 1993
  • The purpose of this study is to provide information of the structure of the social support network and life interchange with the social support network which influence the life satisfaction in the rural elderly. The sample of this study was selected from the elderly living in Korea rural areas. 350 out of 363 respondents were finally selected as datum sources. The methodological instrument was the questionnaire. The major findings of this study can be summarized as follows: First most of rural elderly had the relationship all kinds of social support network-family kin neighbors & friend. And the family was the primary source of support network. The com-mon size of the social support network was 1-3 persons. Second the frequency of the contact with the family the neighbors & the friends were almost daily and they were interacting in a near distance. The interchange with the social support network was high. Life satisfaction of the rural elderly was low. Third the interchange with the family and the kin the emotional interchange had the effect upon life satisfaction. Also the economic service support was significant in the kin and the neighbors.

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노후적응에 관한 연구 - 생활만족도 및 가족의 교류도를 중심으로- (A study on the adjustment problems of the aged)

  • 서병숙
    • 대한가정학회지
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    • 제27권2호
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    • pp.133-148
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    • 1989
  • This study attempts of analyze empirically the living status of the elderly in Korea by finding out the problems of it in the family and by clarifying the influences of the family environmental variables and the values on the adjustment of the aged. To carryout the aim of this study, the causes and the patterns of the problems for the aged had been found out through the review of literature. Based on them the questionnaire was prepared including the questions of the values, family environmental vriables as well as the degree of satisfaction of thier liver and the extent of life interchange. The former variables were taken as independent and the latter were taken as dependent variables, so that the relationship between the two variables could be exemplified. The 400 aged over 60 living in Seoul and the other cities were selected through the purposive sampling and interviewed. The answers of the 376 respondents, 94% of the sample, were analyzed for this study. The following results have been found out through the various statistical analysis such as frequency distribution, chi-square test, pearson's correlation, analysis of variance and cluster analysis. At first, the results from the examination of the frequency distribution regarding the living status of the aged are; I) sixteen percent of the respondents living with their married offspring were receiving economical support, though they pointed out the problems of the extended family are the inconveniences with their children (60%) and simpleness (20%) of their livers. It seems that the aged in Korea are poor and have negative opinion on the relationship with their offspring even if they live in the same house. Secondly, it has been found out that the family environmental variables, especially such as sex, occupation, residence, education, level, living ability and the family type, play and important role not only on the degree of satisfaction of their liver but also on the extent of interchange of their lives. However, the variables such as religion and whether the spouse is alive or not do not play and important role. Thirdly, the reported main reasons of their delightness were healthy life (1.87%), the well-being of their offspring (2.08%), the spouse's long life (3.38%), religious activity (5.05%), the hobby activity (4.31%) and the participation in the social activity (5.05%). While, they mainly concern about the illness (1.98%), offspring (2.00%), econmic difficulties (3.39%), inharmonious home (3.81%) and the despicable treatment (3.81%). The respondents wer classified into two groups, they are dependent and independent, using cluster analysis. Health, social activity, offspiring, religion, couple's long life among the factors which lead them to be delighted were turned out to be statistically signhificant at 0.01 significance level between the two groups. As far as their worrisome matters are concerned, health and economic difficulties were significantly different between the two groups. Fourthly, regarding the life interchange, it has been proved that there is a statistically significant differences betwwen the two groups in the economic and the emotional satisfaction, help for ordinary life, status in the family, subjective and objective relationship with offspring, but not in economic dependency and the activity status. Fifthly, it has been noted that there is a high correlation between the degree of life's satisfaction and the extent of life interchange. On the basis of the results mentioned above, it could be concluded taht; i) The majority of the aged in Korea are not economically active, and thus they live with their married offspring even of they have a negative opinion on the subjective relationship with them. This can be pointed out as the main problem of the aged and thus it needs to be studied further. ii) the environmental variables such as age, sex education level, family type and occuption (which can not be changed by their effrot) turned out to give an important effect on the extent of the life interchange among the aged. iii) The respondents who are identified as independent group have a higher degree of life satisfaction and family status than the group identified as defendent. Thus, it can be inferred that it is possible for them to adjust their life by making an effort to modify themselves. iv) The high correlation between the extent of life interchange and the degree of life satisfaction indicates that the elderly themselves can adjust in order to obtain the higher degree of life satisfaction. Therefore, the following suggestions are derived from this study. First of all, the aged should try to be psychologically independent. Second, they need to control themselves in order to achieve self-assurance. Third, the community have to prepare a program of self-development for the aged. Fourth, the social welfare policy that can solve the problem of illness and poverty of the elderly should be introduced, so that their minimum requirements can be satisfied.

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산업용 플랜트 및 상업용 시설물 전력계통의 안정도에 대한 연구 (A STABILITY STUDY FOR INDUSTRIAL PLANTS AND COMMERCIAL FACILITIES)

  • 김기택;윤덕로
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 전기설비
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    • pp.19-21
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    • 2005
  • The purpose of power system design is, in a word, to provide a good quality of electric power. The design of reliable industrial and commercial power distribution system is important because of the high costs associated with power outage. Three major factors for realization of the purpose are: (1) To hold system frequency at or very close to a specified nominal value(e.g. 60Hz) by control of frequency-effective power. (2) To maintain the correct value of interchange power between power and local generators. (3) To hold system voltage at or very close to a specified nominal value by control of voltage-reactive power. Within the past decade, numbers of industrial and commercial facilities installed with local generation, large motors or both, are increasing. This means that system stability is of concern to a growing number of industrial plant electrical engineers and consultants.

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MOBA based design of FOPID-SSSC for load frequency control of interconnected multi-area power systems

  • Falehi, Ali Darvish
    • Smart Structures and Systems
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    • 제22권1호
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    • pp.81-94
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    • 2018
  • Automatic Generation Control (AGC) has functionally controlled the interchange power flow in order to suppress the dynamic oscillations of frequency and tie-line power deviations as a perturbation occurs in the interconnected multi-area power system. Furthermore, Flexible AC Transmission Systems (FACTS) can effectively assist AGC to more enhance the dynamic stability of power system. So, Static Synchronous Series Compensator (SSSC), one of the well-known FACTS devices, is here applied to accurately control and regulate the load frequency of multi-area multi-source interconnected power system. The research and efforts made in this regard have caused to introduce the Fractional Order Proportional Integral Derivative (FOPID) based SSSC, to alleviate both the most significant issues in multi-area interconnected power systems i.e., frequency and tie-line power deviations. Due to multi-objective nature of aforementioned problem, suppression of the frequency and tie-line power deviations is formularized in the form of a multi-object problem. Considering the high performance of Multi Objective Bees Algorithm (MOBA) in solution of the non-linear objectives, it has been utilized to appropriately unravel the optimization problem. To verify and validate the dynamic performance of self-defined FOPID-SSSC, it has been thoroughly evaluated in three different multi-area interconnected power systems. Meanwhile, the dynamic performance of FOPID-SSSC has been accurately compared with a conventional controller based SSSC while the power systems are affected by different Step Load Perturbations (SLPs). Eventually, the simulation results of all three power systems have transparently demonstrated the dynamic performance of FOPID-SSSC to significantly suppress the frequency and tie-line power deviations as compared to conventional controller based SSSC.

대학이 지역발전에 미치는 영향 -천안시를 중심으로- (An Analysis on the Effect of the University in Area Development)

  • 박종관
    • 한국콘텐츠학회논문지
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    • 제11권6호
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    • pp.360-371
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    • 2011
  • 이 연구는 천안지역을 대상으로 대학이 지역발전에 미치는 영향을 다루었다. 본 연구는 문헌조사와 실증분석을 병행하였다. 설문지는 유효한 133부만을 SPSS 15.0버전으로 빈도분석을 실시하였다. 대학이 지역사회에 미치는 긍정적 효과는 지역사회에 원활한 인적자본의 공급, 지역소득의 증가, 교육기회 확대로 인한 지역 이미지 개선, 각종 대학시설의 지역사회에 제공 등이 있다. 부정적 효과는 양질의 교육을 받은 지역젊은이들이 다른 지역으로 떠나면서 생기는 지역격차의 확대, 지역고유의 문화와 새로운 문화의 충돌로 인한 갈등발생이 있다. 지역발전을 위한 대학의 역할은 보조 자문 역할, 상징적 역할, 교육적 역할 등 여러 가지가 있다. 그러나 가장 중요시 되는 역할은 대학이 지역발전을 주도적으로 이끌어나가는 선도적 역할이다. 마지막으로, 지역 사회 발전을 위한 대학의 활성화 방안은 산학간 인적자원의 이동을 활성화 시켜 고급인력과 운영방식의 교류를 이루어나가는 것이다.