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국내 이동통신서비스의 주파수 대역별 전환수요 예측에 관한 연구
정우수(Woo-Soo Jeong),조병선(Byoung-Sun Cho),하영욱(Young-Wook Ha) 한국경영과학회 2008 經營 科學 Vol.25 No.1
In the mobile communication service market, this study represents an attempt to forecast the subscribers of the IMT-2000 service market using the questionnaire of experts which is the qualitative technique is used. In this study, by using the substitution model of next generations among products in order to analyze the IMT-2000 demand of service, a demand was predicted. And by estimating the market demand prospect in which it becomes the important factor of the IMT-2000 service diffusion according to each bandwidth frequency the politically necessary approaching direction about the frequency was presented. It will be able to become the important part to not only the business carrier but also the policy maker to examine a prospect toward the subscriber of the IMT-2000 service. As a result, the market demand was exposed to be most big when the SKT 800MHz, and the KTF 800(900)MHz were used as the additional frequency. And it was likely to reach to the IMT-2000 number of subscribers to about 35,750 thousand peoples in the future at 2015.
김문구(MoonKoo Kim),박종현(JongHyun Park),이승민(Seungmin, Lee),하영욱(Young Woo Ha),최문정(Moonjung Choi),지수영(Sooyoung Chi),임현(Yim, Hyun),오지선(Jee-Sun Oh) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
디지털 기술의 발전에 따라 디지털 역기능 역시 다양한 양상으로 전개되어 개인의 삶과 사회적 행태에 커다란 영향을 미칠 것으로 전망된다. 이에 본 연구에서는 2030년 미래 디지털 역기능을 전망하고 인공지능, 메타버스, 블록체인, 지능형 로봇으로 선정된 대표디지털 기술이 세부 역기능에 미치는 영향을 분석하고자 하였다. 국내 디지털 기술 관련 전문가에 대해 심층 온라인 조사를 분석한 결과, 현재에 비해 미래 사회에서 디지털 역기능은 심각히 전개되고 이에 따른 사회적·경제적 부담이 상당할 것으로 전망되었다. 디지털 역기능의 세부 항목들은 그 속성에 따라 미래 심각성 정도가 달랐으며 디지털 기술의 특성이 반영되어 세부 디지털 역기능에서 다르게 발현될 것으로 나타났다. 조사결과를 바탕으로 디지털 역기능에 선제적으로 대응하기 위한 방향을 제언하였다.
강창수,민병우,편영식,송광순,하영욱 대한골절학회 1994 대한골절학회지 Vol.7 No.1
The best method of treatment for displaced comminuted fractures of the radial head is still controversial. Early excision of the fractured radial head has been favored by a number of authors. but problems such as chronic pain in the elbow, forearm or wrist, restricted movement of the elbow, late subluxation of the distal radio-ulnar joint can ensue. So prosthetic replacement of the radial head had been advocated either for acute treatment of a fracture or for delayed treatment, when conservative treatment has failed. We analyzed 10 patients with comminuted radial head fracture treated by silastic prosthesis replacement shortly after injury from Jan. 1988 to Dec. 1992. The results were as follows. l. Age distribution at operation was varied from 19 to 57 year with the average at 40.9 year. 2. The average time interval between initial radial head fracture and silastic prosthetic replacement was about 10 days(range 4 days to 18 days) 3. 6 patients(60%) were free of elbow, pain 2 patients(20%) had intermittent mild pain especially at night and 2 patients(20%) had mild pain only after heavy work. 4. All patients were free of wrist pain. 5. There was no patient of breaking or tilting of prosthesis radiologically. 6. Overall assessment showed excellent in 4 patients (40%), good in 4 patients(40%) and poor in 2 patients (20%).