스마트폰을 이용한 디지털 적립 서비스 시스템 개발

강남희,Kang, Nam-Hi 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.3

스마트폰 사용자의 증가와 다양한 마케팅 전략의 일환으로 최근 다양한 모바일 적립 서비스가 활성화 되고 있다. 적립 서비스는 사용자의 충성도를 증가시키고 구매 의욕을 극대화 시키는 대표적인 마케팅 서비스이다. 기존 오프라인 적립 서비스의 경우 사용자는 많은 수의 적립카드를 소지해야 하는 불편함이 있었다. 또한 이를 디지털화한 모바일 적립 서비스의 경우에도 많은 적립카드에서 사용 가능한 카드를 수동 검색해야 하는 검색 비용이 요구된다. 본 논문에서는 이를 해결하기 위해 사용자의 현 위치를 파악하여 사용가능한 적립 카드를 자동으로 검색할 수 있는 방안을 핵심 기능으로 하는 모바일 적립 서비스 시스템을 설계하고 개발한다. Increasing users of smart phone and various marketing strategies activate lots of mobile mileage services recently. Such a mileage service is a typical marketing service to increase brand loyalty of clients and maximize purchase motivation. However, traditional offline mileage services introduce discomfort that users have to carry lots of mileage cards physically. Also, in case of using digital mobile mileage service, users have to search specific card to use from lots of digital cards stored in his mobile device. In this paper, to solve the problems, we design and develop a mobile mileage service system that especially discover a proper card automatically based on location information of user.

존 기반 MANET에서의 주소 자동 설정 기술을 이용한 라우팅 프로토콜

박일균,강남희,김영한,Park, Ik-Kyun,Kang, Nam-Hi,Kim, Young-Han 한국정보처리학회 2006 정보처리학회논문지 C : 정보통신,정보보안 Vol.13 No.7

MANET의 규모가 커짐에 따라 라우팅 성능이 저하되는 문제를 해결하기 위해 대규모의 단일 MANET(mobile ad hoc network)을 존(zone) 이라는 이름의 여러 개의 소규모 MANET들로 분할한 계층형 구조가 제안되고 있다. 본 논문에서는 주소 자동 설정 과정을 통해 얻은 각 노드의 정보들을 MANET 라우팅 기법에 접목하여, 라우팅 프로토콜의 메시지 수를 줄이거나 라우팅 동작 절차를 간소화함으로써 MANET 노드들의 라우팅 부하를 감소시키는 기법을 제안하였다. 제안된 방법은 모의 실험을 통하여 기존 방식의 라우팅 성능을 유지하면서 라우팅 메시지 전송 부하를 줄일 수 있음을 확인하였다. In large-scale MANETs, the performance of MANET routing protocols is degraded significantly. To avoid this, zone-based hierarchical architecture is proposed. In this architecture, single large-scale MANET is divided into multiple small-scale MANETs. In this paper, we propose autoconfiguration-coupled MANET routing protocol to reduce routing overhead of mim user nodes. If MANET routing protocol utilizes the autoconfigured information of each user node, its overhead or procedure can be reduced. Proposed method shows the degradation of routing overhead of user nodes via simulation.

다수 라디오와 채널을 갖는 무선통신망에서 채널경쟁을 고려한 라우팅

고성원,강민수,강남희,김영한,Ko, Sung-Won,Kang, Min-Su,Kang, Nam-Hi,Kim, Young-Han 대한전자공학회 2007 電子工學會論文誌-TC (Telecommunications) Vol.44 No.5

무선통신망에서 단일 라디오와 채널의 사용은 무선 노드의 반이중 전송 및 경로의 내부간섭으로 통신망의 처리율 및 단대단 지연 특성을 저하시킨다. 또한, 채널경쟁기반의 무선통신망에서 임의노드 주변에 동일 채널을 경쟁하는 노드가 많으면 경쟁으로 인한 대역폭 감소와 전송 충돌로 인한 지연이 발생하여 통신망의 성능을 저하시킨다. 본 논문에서는 다수 라디오와 채널을 사용하여 무선노드의 전이중전송이 가능하게 하고 경로내부간섭을 배제할 수 있도록 라디오와 채널의 기능을 설정하고 큐잉이론의 해석모델을 이용하여 무선구간의 채널 경쟁 및 충돌을 반영한 무선구간 메트릭 ccf 및 ccf와 함께 채널변경지연, 경로내부간섭을 반영한 경로설정 메트릭 MCCR을 제안한다. MCCR과 MCR을 시뮬레이션을 사용하여 비교하였으며 MCCR을 사용하여 설정한 경로가 MCR보다 통신망 성능을 향상시키는 결과를 얻었다. In wireless communication networks, single-radio single-channel architecture degrades throughput and end-to-end delay due to half-duplex transmission of wireless node and route intra interference. Also, In contention-based MAC (Medium Access Control) architecture, channel contention reduces throughput and packet collision enlarges end-to-end delay. In this paper, we use multi-radio multi-channel architecture which will make wireless node to operate in full duplex mode, and exclude route intra interference. Based on this architecture, we propose a new link metric, ccf which reflects the characteristics of a contention-based wireless link, and propose a routing path metric MCCR considering channel switching delay and route intra interference. MCCR is compared with MCR by simulation, the performance of a route established by MCCR outperforms the performance of a route by MCR in terms of throughput and end-to-end delay.

버퍼관리기술을 적용한 서비스거부 공격 탐지 기술

노희경(Noh Hee Kyeong),강남희(Kang Nam Hi) 한국통신학회 2011 한국통신학회 학술대회논문집 Vol.2011 No.11

農村住民의 傷病과 醫療實態에 관한 調査硏究

金洙明(Kim, Soo-Myong),洪鍾寬(Hong, Jong-Kwan),姜南熙(Kang, Nam-Hi) 인구문제연구소 1975 人口問題論集 Vol.- No.19

保健人力의 需給에 關한 硏究 : 看護員의 動態分析을 中心으로

許程,姜南姬,韓達鮮,文玉綸 서울大學校 保建大學院 1971 公衆保健雜誌 Vol.8 No.2

In order to obtain basic data required for the formulation of the health and medical care plan of Korea, various publications concerning the supply and demand of medical manpower were studied, and surveys were conducted on 1,334 nurses employed by hospitals and public health centers in selected areas. As the results through the analysis of collected data, the following conclusion has been reached: 1) As for the distribution of nurses by age group, the group of 20 to 24 years constituted the greatest proportion or 49.3per cent, the group of 25 to 29 years the second greatest proportion or 22.3per cent, the group of 30 to 34 years the third greatest proportion or 11.9per cent, and the group of 50 years or more 1.4per cent. 2) As for the number of family members, five-member families constituted the greatest proportion or 18.1per cent, six-member familiest the second greatest proportion or 15.0per cent, seven-member families the third greatest proportion or 14.2per cent, and familes with five or more members occupied 71.7per cent of the total number of families surveyed. 3) As for the marital status of the surveyed nurses, unmarried nurses constituted the greatest proportion or 64.6per cent, married nurses 32.2per cent, widowed nurses 0.9per cent, and divorced nurses 0.5per cent. 4) As for the occupations of their spouses, government officials and other office workers constituted the greatest proportion of 47.0per cent, those engaged in commercial business the second greatest proportion or 20.5per cent, professionals 17.2per cent, and unemployed spouses 3.3per cent. 5) The nurse who graduated from three-year-course nursing colleges constituted the greatest proportion or 49.3per cent, graduates of nursing high schools the second greatest proportion or 23.1per cent, and graduates of four-year-course nursing colleges or nursing departments of colleges the third greatest proportion or 22.9per cent. 6) 24.4per cent of the surveyed nurses had midwife licenses, and 60.7per cent did not have licenses. The proportions of nurses who had midwife licenses varied extensively among different age groups. 7) As for the period of continuous service at current places of employment, nurses who had been employed for 12 to 18 months constituted the greatest proportion or 19.9per cent, those employed for three to six months the second greatest proportion or 16.0per cent, those employed for less than three months the third greatest proportion ro 15.7per cent, and those employed for five years or more 10.4per cent. 8) The total period of professionally active life span of incumbent nurses was 130.3 months for the age group of 35 to 39 years, 113.7 months for the age group of 30 to 34 years, and 108.4 months for the age group of 40 to 44 yeras. If non-respondents(most of whom are considered to have no previous employment) are taken into account, their professional life was 97.8 months for the age group of 35 to 39 years 89.3 months for the age group of 40 to 44 years, and 79.9 months for the age group of 45 to 49 yeras. Their occupational life span would have been far shorter if retired nurses were also taken into account. By kind of nursing educatin, the professional life span of nursing high school graduates was 151.0 months (115.5 months if non-respondents are taken into account), that of three-year-course nursing college graduates 78.4 months (38.9 months if non-respondents are taken into account), and that of four-year-course nursing college graduates 99.0 months (49.8 months if non-respondents are taken into accout). 9) The greatest proportion or 47.1per cent of the surveyed nurses wished to continuously work as nurse for one or two more years, 17.1per cent wished to work for three or four more years, and 10.0per cent wished to work for life. 10) Seventy three per cent of the surveyed nurses have retired from their profession once, 22.5per cent twice, and 2.2per cent three or more times. 11) The age group of 25 to 29 years constituted 41.6per cent or the greatest proportion of those who have once retired form their occupation, and the age group of 20 to 24 years 39.3per cent or the second greatest proportion. As for reasons for their retirement, marriage accounted for the greatest proportion or 50.0per cent, the conduct of household affairs for the second greatest proportion or 23.6per cent, and their own change of profession(or place of employment) and that of their husbands respectively for 4.5per cent. 12) The age group of 30 to 40 years constituted 8.4per cent or the greatest proportion of those who have retired form their occupation twice, and the age group of 25 to 29 years 7.3per cent or the second greatest proportion. As for reasons for their retirement, the conduct of household affairs constituted the greatest proportion or 10.7per cent, the transfer of occupation (or place of employment) of their husbands the second greatest proportion or 3.9per cent, and marriage the third greatest proportio or 2.8per cent. 13) The greatest proportio or 48.7per cent of the surveyed nurses wished to work at hospital in the future, the second greatest proportio or 13.3per cent wished to work as school nurse, and the third greatest proportion or 9.0per cent wished to work at health center. The most desired places of work varied by age group. 14) Of the surveyed nurses 46.8per cent did not want to continously work as nurse after they got married, while only 17.5per cent wished to continuously work. 15) The monthly income of the greatest proportion or 24.3per cent was 15,000 to 20,000, that of the second greatest proportion or 24.1per cent 25,000 to 30,000, and the third greatest proportio or 15.1per cent 20,000 and 25,000. On the basis of the above conclusion, the following recommendation is made: (1) Most of the nurses wish to cease working as nurse upon getting married. Unless special measures are worked out to extend their short prefessional life span, their professional service is considered to be far below the amount of investment in their training, and the supply of nurses seriously short of demand in the future. (2) The salaries ofnurses are obviously extremely small in consideration of their work volume and occupational function and in comparion with employees in other professions of the comparable level. It is considered urgent to improve their treatment. 16) The estimated data concerning the supply and demand of physicians is the fundamental factor in estimating the supply and demand of medical manpower as a whole. The demand for physicians in 1986 was estimated at 40,028, and the supply of physicians at 32,465 or 81.1per cent of the demand, thereby showing a shortage of 7,563 physicians. 17) The demand for dentists was estimated at 8,053 or one fifth of that for physicians, and their supply at 6,102, thereby showing a shortage of 1,951 dentists. 18) On the premise that two nurses would be needed per physician, the demand for nurses was estimated at 80,592 while their supply was estimated at 62,445, thereby showing a shortage of 18,147 nurses. 19) On the premise that one pharmacist would be needed for every two physicians, the demand for pharmacists was estimated at 26,793, while their supply was estimated at 27,809 thereby showing and anticipated exessive supply. This points to the necessity of readjusting the authorized enrollment and departments of colleges. 20) The demand for medical assistants was estimated at a total of 30,410, and their supply at 20,607 or 67.8per cent of the demand, thereby showing a shortage of 9,803 medical assistants. a. The demand for X-ray technicians was estmated at 2,680, and their supply at 1,461 or 54.5per cent of the demand, thereby showing a shortage of 1,219 technicians. b. The demand for clinical pathologists and sanitary experimenters was estimated at a total of 3,090 and their supply at a total of 2,890 or 93.6per cent of their demand, thereby showing a total shortage of 200 clinical pathologists and sanitary experimenters. c. The demand for dental craftsmen was estimated at 1,051 and their supply at 1,160 or 110.5per cent of their demand, thereby showing an excessive supply. d. The demand for dental hygienists was estimated at 670, but no dental hygienist is expected to be supplied at all. e. The demand for nursing aids was estimated at 20,800 and their supply at 13,484 or 64.8per cent of their demand, thereby showing a shortage of 7,315 nursing aids. f. The demand for sanitarians was estimated at 1,400 and their supply at 1,270 or 90.7per cent of their demand, thereby showing a shortage of 7,315 sanitarians. g. The demand for physiotherapists and work therapists was estimated at a total of 720, and their supply at a total of 340 ro 47.2per cent of their total demand. In short, the supply of physicians, dentists, nurses and medical assistants is expected to be short of their respective estimated demand, while the supply of pharmacists is expected to surpass their demand. The imbalance between supply and demand reflects defects involved in the current system and its related policy. Therefore, the following measures are recommended to be worked out and implemented in order to eradicate the imbalance: 1) Step-by-step increase in the supply of professional: A step-by-step increase is desirable under a reasonable medical manpower plan. However, this will take a long period of time. 2) Replacement with assistants: It is believed that the productivity of professional personnel should be elevated through an extensive delegatio of non-specialized low-level technical work to assistants. In order to cover the above-mentioned anticipated shortage of medical assistants, therefore, it is recommended that authorities take bold systemic actions.