• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.5A
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• pp.846-854
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• 2001

본 논문에서는 무선통신로 채널상에 존재하는 가우스 잡음을 포함한 협대역 A급 임펄스 잡음과 나카가미 페이딩 환경에서 하이브리드 DS/FH-CDMA MFSK 시스템의 성능을 비교 분석하고, 성능 개선 기법으로 MRC 다이버시티 수신 기법과 부호화 기법을 동시에 채용함으로써 고려되어진 시스템의 성능을 개선시켰다. 결과에 의하면 임펄스 지수가 강할수록 또한, 페이딩 지수가 작을수록 하이브리드 DS/FH-CDMA 시스템에서는 성능이 더욱 열화됨을 알 수 있었고, 성능 개선 기법으로 BCH 부호화 기법을 채용했을 경우 페이딩 지수가 증가할수록 성능개선의 폭이 큼을 알 수 있었다. 페이딩 지수가 작은 열악한 환경에서는 MRC 다이버시티 수신 기법을 채용하였을 경우 시스템 성능이 우수하였지만, 페이딩 영향이 감소할수록 BCH 부호화 기법을 채용하였을 경우 시스템 성능이 우수함을 알 수 있었다. 또한, 레일리 페이딩 환경에서 각각의 성능개선 기법을 단독으로 채용하였을 경우, 음성서비스 품질($10^{-3}$)에 도달할 수 없지만, BCH 부호화 기법과 MRC 다이버시티를 동시에 채용함으로써 강한 임펄스 잡음 하에서도 24dB 이상에서 음성서비스 기준 오율을 만족하는 성능 개선 효과를 얻을 수 있었고, 페이딩 지수가( $m_{i}$=3) 이상에서는 강한 임펄스 잡음이 부가되어도 21dB에서 $10^{-3}$을 만족하고 28dB 이상에서는 데이터 서비스 기준($10^{-5}$) 오율을 만족하는 우수한 성능 개선 효과를 보임으로써 다이버시티 가지수와 부호화의 이득에 의한 에러 성능이 향상되었다.

• Korean Journal of Social Welfare
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• v.65 no.3
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• pp.131-153
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• 2013

This study examine the selection criteria for recruiting social workers, commonly agreed by the persons in charge of human resources. We visited 46 social welfare facilities and performed interviews individually with them. Thirty three items belong to 7 different areas (ability, career, suitability and agreement to the facility, characteristics, recommendation, religion) were made based on the results of interviews, and these items were sent to social welfare facilities in 16 different cities in Korea for asking questions (from Oct, 2012 to Apr, 2013). One hundred and sixty cases were collected and among them 45 cases exhibiting consistency rate less than 0.2 were finally selected. Superior scope and subordinate scope were extracted and comparisons between day care centers and living institutions were made. Results demonstrated that ability of social workers was the most important for superior scope and suitability and agreement of social workers to both day care centers and living institutions were the most important factor for recruiting workers.

• 해운
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• no.11 s.22
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• pp.2-17
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• 2005

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.5
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• pp.1005-1015
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• 2000

In this paper, the performance of Hybrid CDU MFSK system has been analyzed in the environment that narrowband Class-A impulsive noise include Gaussian noise in wireless communication channel and Nakagami fading. The performance of system improved to adopting both of technique MRC diversity and BCH channel coding. The results show that there is substantial degraded in Hybrid CDMA system performance by impulse index is stronger and the fading index is smaller. But also improvement can be obtained when BCH coding techniques are adopted. Additional MRC diversity techniques is more improvement than BCH coding techniques when degraded environment with the low fading index. But BCH coding techniques is more improvement than MRC diversity techniques when fading index has been increased. The Hybrid CDMA MFSK system is incomplete to voice communication standard BER$(10^{-3})$ in Rayleigh fading by independent each adopting techniques BCH coding and MRC diversity. But it's satisfy(improvement can be obtained) to voice communication standard BER in strong impulse noise(24dB over) by adopting techniques BCH coding and MRC diversity at a time. Additional it's a substantial enhancement $(10^{-3})$satisfaction) in fading index (m=3, 22dB) in addition to strong impulse noise and 24dB over with data service standard $(10^{-5})$ BER satisfaction. This result show that there is error performance improved by diversity branch and coding advantage.

• Therapeutic Science for Rehabilitation
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• v.9 no.2
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• pp.39-53
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• 2020

Objective : This study aims to identify the job market for occupational therapists by analyzing recruitment advertisements for occupational therapists from 2011 to 2018. Methods : A total of 15,869 job placement notices posted on the portal site(http://otbrain.com/) were collected to analyze the job market for occupational therapists based on their regions, employment types, salary levels, employment times, and recruitment fields. Results : The total number of annual recruitment advertisements for occupational therapists was 544 which was higher than the number of people who passed the national exam. According to the region, recruitments were concentrated in the Seoul and Gyeonggi Province. According to employment type, the employment rate of permanent workers was on the decline but that of temporary workers showed an increasing trend. The salary level was the highest with the annual salary ranging from 20 million won to 25 million won or less, and the recruitment fields were found to have about 4.6 times more offerings in the adult and senior fields than in the pediatric fields. Conclusion : These study results can be used as a basic data for identifying the job market for occupational therapists.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.15 no.1
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• pp.209-224
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• 2020

This study started from the question of whether the preference of corporate recruitment can be achieved without any difference between the start-up experiencer and the general job seekers. Therefore, the purpose of the study is to identify the factors related to start-ups that affect the preference of job seekers for companies, and to analyze the differences in the factors related to start-ups between general job seekers and job seekers with start-up experience. Third, it is to see the difference in the preference for employment between job seekers with start-up experiences and general job seekers. The independent variables of the research model were entrepreneurship, motivation for start-up (job search), and characteristics of the job seekers (founder). The dependent variables were job preference, and the moderating variables were presented as job seekers' classification (job seekers with start-up experience vs. general job seekers). The subjects of the study were personnel managers of 100 companies with more than 5 years of establishment and 100 new companies with less than 5 years of establishment. The questionnaire was distributed in two types, and 189 respondents, including 101 job seekers with start-up experiences and 88 general job seekers, were finally used for analysis. The results of the study were as follows. First, as a result of multiple regression analysis on both experienced start-up experiencers and general job seekers, only entrepreneurship had an effect on preference for recruitment. Second, the moderating effect of job seekers' classification was found only in the relationship between motivation for start-up and preference for employment. Third, the result of multiple regression analysis based on the start-up experiencers showed that the relationship between the motivation for start-up, the preference for recruitment, the characteristics of founders and the preference for recruitment was statistically significant. On the other hand, the characteristics of the founder and the preference for employment were rejected. Fourth, the results of the study based on general job seekers showed that the motivation for job search decreased the preference for employment. The study did not provide the results of differences in recognition between different industries, traditional enterprises and venture businesses due to the limitation of small examples. There is no clear definition of start-up experiencers either. However, it is meaningful to suggest the implications of what preparations should be made when the start-up experiencers close their start-ups and turn their career into employment and to help them to accurately recognize the importance of entrepreneurship. It also provides the preference of the general job seekers for the company, the preparation for successful employment, and the implications for the direction of the future start-up revitalization.

• Fire Science and Engineering
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• v.21 no.4
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• pp.88-98
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• 2007

This study put the purpose to contribute in the way of complementing a qualification of the opened examination for the fire service to improvement of disposition and specialty of a firemen, and to development of a fire department. The subjects of the opened examination for the fire service are mostly same as those of general civil service examination, and they incite indiscreet competition. As a result, firemen morale became declining. On the basis of every kind of documents and data and the analysis of a questionnaire with students of the department of fire safety supervision, we should solve the problems of lack of qualification and professionality causing stress from work by the unit completion system, which qualifies those who complete prescribed unit in the opened examination for the fire service. It must promote the specialty of a fire fighter so that we can step up to the advanced fire department.

• 동물약계
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• no.31
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• pp.2-3
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• 1996

1. 신규허가 2. 제조(수입)업 허가사항 변경 3. 동물약사 감시결과 안내 4. 기술검토 자료제출 철저 5. 세미나 개최 6. 안전축산물 생산운동 창립총회 7. 안전성$\cdot$유효성 심사규정집 발간 8. 무역업무자동화(EDI) 관련 안내 9. 조합직원 신규채용 10. 배합사료제조용 동물약품 사용기준 잠정조치 11. 통합공고 개정안내 12. 업체별 유당배정량 변경 13. EDI 협조요청

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.1
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• pp.211-218
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• 2000

This paper describes the improvement of broadband radio channel characteristics using a MMSE adaptive equalization technique as a fundamental study of high transmission rates in indoor radio channel. First, the performance of 16-QAM system that employs a MMSE linear adaptive equalizer in Rayleigh fading channel is analyzed. Next, in order to improve broadband radio channel characteristics, we apply an adaptive equalization technique employing the MMSE algorithm to the radio channel measured by using circularly polarized antenna under indoor NLOS(non-line-of sight) environment. Consequently, for 16-QAM with adaptive equalizer, we can achieve the improvement of about 13 dB at $10^{-3}$ error rate as compared with general 16-QAM. Moreover, it was found that the adaptive equalization technique could improve broadband radio channel characteristics over the all measured areas. Also, it was found that the employing both adaptive equalization and polarization diversity technique together could improve broadband radio channel characteristics and reduce fading more effectively.

• Journal of the Society of Disaster Information
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• v.9 no.1
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• pp.87-96
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• 2013

The purpose of this research is to suggest specialization measures of student protecting manpower for the prevention of school violence in Korea. Therefore, student protecting manpower's legal limitation, insufficiency of professionalism, insufficiency of recruitment standard's suitability, insufficiency of educational training, cooperative problem with related institutions and ethical problems were drawn as the problems of student protecting manpower. The measures for improving those problems are as follows. The first is to revise laws related to school protecting manpower and strengthen systems. The second is to prepare proper standard to recruit student protecting manpower. The third is to establish professional training institution of student protecting manpower. The fourth is to establish close cooperation system with institutions related to student protection. The fifth is to legislate ethics codes of student protecting manpower.