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Design and Implementation of a Real-time Bio-signal Obtaining, Transmitting, Compressing and Storing System for Telemedicine (원격 진료를 위한 실시간 생체 신호 취득, 전송 및 압축, 저장 시스템의 설계 및 구현)

  • Jung, In-Kyo;Kim, Young-Joon;Park, In-Su;Lee, In-Sung
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.45 no.4
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    • pp.42-50
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    • 2008
  • The real-time bio-signal monitoring system based on the ZigBee and SIP/RTP has proposed and implemented for telemedicine but that has some problems at the stabilities to transmit bio-signal from the sensors to the other sides. In this paper, we designed and implemented a real-time bio-signal monitoring system that is focused on the reliability and efficiency for transmitting bio-signal at real-time. We designed the system to have enhanced architecture and performance in the ubiquitous sensor network, SIP/RTP real-time transmission and management of the database. The Bluetooth network is combined with ZigBee network to distribute traffic of the ECG and the other bio-signal. The modified and multiplied RTP session is used to ensure real-time transmission of ECG, other bio-signals and speech information on the internet. The modified ECG compression method based on DWLT and MSVQ is used to reduce data rate for storing ECG to the database. Finally we implemented a system that has improved performance for transmitting bio-signal from the sensors to the monitoring console and database. This implemented system makes possible to make various applications to serve U-health care services.

Modified Atmosphere Packaging of Shiitake Mushroom Packed with Perforated Film and Ceramic Films (기공필름과 광물질 연입 필름 포장한 표고버섯의 MAP효과)

  • 정문철;남궁배;이호준;임정호
    • Food Science and Preservation
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    • v.8 no.1
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    • pp.47-53
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    • 2001
  • In order to investigate the effect of two type of ceramic film(15% SiO$_2$ incorporated LDPE, 10% zeolite incorporated LDPE), perforated film and LDPE film on freshness of shiitake mushroom, weight loss, surface color and marketability of mushroom were measured during MA storage at 5 $\^{C}$ and 20$\^{C}$. The effect of packaging films on weight loss and marketability index of shiitake mushroom at 20$\^{C}$ was negligible due to its rapid physiological changes. However, the effect of packaging films on surface color of shiitake mushroom was significant at 20$\^{C}$ storage, but not at 5$\^{C}$ storage. During MA storage of shiitake mushroon, discoloration were reduced effectively by ceramic films and weight loss were by LDPE film, but they had little difference between packaging 51ms. However, there were significant differences among the packaging films in marketability of mushroom induced by water vapor inside package and accelerate its spoilage and browning. Ceramic film(15% SiO$_2$ incorporated LDPE) showed best result to maintain marketability of shiitake mushroom and zeolite incorporated film, perforated film, LDPE film in order.

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An Empirical Study on the Strategy and Implications of M&A in Korea IT companies (한국 IT 기업의 M&A 전략과 시사점)

  • Son, Myung-Sub;Seo, Yong-Mo;Hyun, Byung-Hwan
    • Journal of the Korea Convergence Society
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    • v.8 no.3
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    • pp.245-252
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    • 2017
  • The purpose of this study is to analyze the effects of mergers and acquisitions of domestic IT companies on strategic aspects of internal capacity enhancement. Empirical analysis applied to this study analyzed the business performance in the market through the merger of Daum Communications and Kakao Group. After Daum pursued the merger with Kakao, it showed that the platform business of kakao is expanding to the domain of the existing portal site. The merger was completed, and the total value of the stocks went up to the highest level, but soon its value declined. The merger shows that the growth potential of the enterprise is temporarily declining, which seems to be the internal cost of the merger. Even in the case of profitability, the merger did not show positive results. In the case of stability, the expectation due to the merger was reflected and slightly increased. The following two companies were interested in the kakao when they viewed the merger through a chronological analysis. However, after the merger, the interest of the next kakao was similar. This is seen as a result of the expansion of kakao's diverse platform business rather than the following search sites. From the results of this study, it is suggested that domestic IT companies should approach by analyzing the strategic factors that generate synergy when pursuing M & A to strengthen their resources or capabilities.

A Study on the Effect of Pro-Environmental Consumers on Environmental Education Utilizing Value-Attitude-Behavior Model (가치-태도-행동모델(VAB)을 활용한 친환경 소비자의 환경교육의 조절효과 연구)

  • Hwang, Youn-Sung;Seo, Yong-Mo
    • Journal of the Korea Convergence Society
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    • v.8 no.7
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    • pp.273-282
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    • 2017
  • This empirical study is to verify the moderating effects of environmental education on pro-environmental consumers. For this purpose, we used Value-Attitude-Behaviro Model(VAB). In addition, as an environmental education method, the environmental education method using 7 environmental movies by the multimedia with excellent learning effect in order to increase the interest and educational commitment of the learners was utilized. A total of 116 subjects were divided into experimental group and control group, and the experiment was designed based on Pretest-Posttest Control Group Design to grasp the effect of environmental education after conducting environmental education to the experiment group. The results of the analysis showed that environmental education had no effect on environmental values but it had a positive effect on improving the attitude and the pro-environmental behavior. This study proved that the sustainable environmental education could form pro-environmental behavior, even though the environmental sense of values had not been formed in adolescence, and furthermore, the earlier researches had been mainly focused on the effect of the environmental education for the adolescent.

Germanische Resonantengemination und Laryngaltheorie (게르만어의 공명음 중복현상과 후두음이론)

  • Jeon Soon-Hwan
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.5
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    • pp.1-22
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    • 2002
  • 본 논문의 목적은 게르만제어(예를들어 고트어, 고대북구어, 고고지독일어, 고대영어 등)에 나타나는 공명음중복 현상이 원-인도유럽어시기의 후두음에 기인함을 보이는 것이다. 고트어의 ddj/ggw, 고대북구어의 ggi/ggr, 고고지독일어 ij/uw (이상 소위 '예음화현상'으로 불림)와 그 외 게르만제어에 공통적으로 나타나는 공명음들의 중복, -rr-, -ll-, -nn-, -mm- 등은 원-게르만어시기에 각각 $\ast-ii-,\;\ast-uu-,\;\ast-rr-,\;\ast-ll-,\;\ast-nn-,\;\ast-mm-$ 등으로 소급된다. 그러나 이러한 자음군이 게르만어 이외의 다른 인도유럽어들( 대표적으로 고대인도이란어, 고전희랍어, 라전어 등)과 비교되어 원-인도유럽어시기로 소급되는 경우, 각각 $\ast-iH-,\;\ast-uH-,\;\ast-rH-,\;\ast-lH-,\;\ast-nH-,\;\ast-mH-$ 등으로 재구된다. 따라서 원-게르만어의 자음중복 현상이 후두음의 영향으로 나타난 것으로 해석되는데, 아마도 후두음이 선행하는 공명음에 동화되어 일어난 것으로 보인다. 소쉬르(1987)이래 발전해 온 후두음이론은 현재 그 이론적 틀을 확립한 상태이다. 이 이론은 고전 인도유럽어학에서 설명하지 못했던 여러 언어현상들을 설명하였고, 현대 인도유럽어 역사비교언어학에서 언어변화에 대한 필수적인 설명기재로서 사용되고 있다. 원-인도유럽어의 많은 특징들을 계승한 전형적인 다른 고대 인도유럽어들과는 달리, 시기적으로 늦은 고대 게르만어에서 음운론적 층위에서 공명음중복 현상이 후두음에 기인함은 인도유럽어 역사비교언어학에서 뿐만 아니라 게르만어학에서도 큰 의미를 갖는다고 볼 수 있다.간접으로 본동사 앞에 놓여 있어야 되는 모든 문장성분과 부문장 때문에, 즉 한국어의 전면적인 전위수식 현상으로 흔히 큰 부담/복잡함을 야기한다는 데에 그 원인이 있다. 이러한 상황에서 동사는 가능한 한 그의 문장성분을 줄이려 한다. 통사적으로 보장되어 이미 있으니 말이다. 그래서 한국어 동사의 부정성은 일종의 부담해소 대책으로 간주될 수 있을 것이다. $\ast$ 두 비교 대상에서의 핵 및 최소문장 가능성은 역시 원자가에 대한 비구속성에서 비롯된다. $\ast$ 우리 한국인이 빨리 말할 때 흔히 범하는 부정성으로 인한 인칭변화에서의 오류는 무엇보다도 정형성/제한성을 지닌 독일어 정동사가 인칭 변화하는 데 반해 한국어에서는 부정성/비구속성을 지닌 동사가 그것과는 무관한 페 기인한다. 동사의 속성을 철저히 분석함으로써 이런 과오를 극복해야 할 것이다. 한국어 동사의 부정성은 지금까지 거의 연구되지 않았다. 이 문제는 또한 지속적으로 수많은 다른 자연어들과의 비교분석을 통해 관찰돼야 할 것이다. 이 논문이 이런 연구와 언어습득을 위한 작업에 도움이 되기를 바란다.적 성분구조가 다르다는 것을 알 수 있다. 우리는 이 글이 외국어로서의 독일어를 배우는 이들에게 독일어의 관용구를 보다 올바르게 이해할 수 있는 방법론적인 토대를 제공함은 물론, (관용어) 사전에서 외국인 학습자를 고려하여 관용구를 알기 쉽게 기술하는 데 도움을 줄 수 있기를 바란다.되기 시작하면서 남황해 분지는 구조역전의 현상이 일어났으며, 동시에 발해 분지는 인리형 분지로 발달하게 되었다. 따라서, 올리고세 동안 발해 분지에서는 퇴적작용이, 남황해 분지에서는 심한 구조역전에 의한 분지변형이 동시에 일어났다 올리고세 이후 현재까지, 남황해

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Relationships between osteoporosis, alveolar bone density and periodontal disease in postmenopausal women (골다공증과 악골의 골밀도 및 치주 질환과의 상관 관계)

  • Han, E.Y.;Rhyu, I.C.;Lee, Y.M.;Ku, Y.;Han, S.B.;Choi, S.M.;Shin, J.Y.;Yang, S.M.;Chung, C.P.
    • Journal of Periodontal and Implant Science
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    • v.31 no.3
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    • pp.565-571
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    • 2001
  • The purpose of this study is to determine if a relationship exists among osteoporosis, alveolar bone density and periodontal disease in postmenopausal osteoporotic women and postmenopausal healthy women. Twenty-two women were evaluated for this study. They were attending the postmenopausal clinic, Seoul National University Hospital and generally healthy except osteoporosis. They had experienced menopause not less than one year when we began to examine them. Bone densities of lumbar area(L2-L4) was determined by DEXA(LUNAR-expert Co,. U.S.A). We diagnosed osteoporosis when T-score was below -2.5 and healthy state when T-score was over -1. Osteoporotic(10 female), not hormone-treated group and healthy control group(12 female) were asked for their age, menopausal age, menopausal period and the number of remaining teeth and examined clinically for plaque index(PI), gingival index(GI), clinical attachment loss(CAL) on their 6 Ramfjord index teeth. Intraoral radiographs were taken in maxillary anterior zone. All films were equally exposed and developed. Each films was digitized and analysed using image processing software, Scion image. Alveolar bone regions of interest were selected and Intensity of each pixel was quantized in the array ranging from 0(white) to 255(black). The two groups were comparable with respect age, menopausal age, menopausal period and number of remaining teeth. The osteoporotic women had significantly lower alveolar bone density than controls in maxilla. But no significant difference was found with respect clinical attachment loss, plaque index and gingival index. Supported by the Ministry of Public Health and Welfare, Korea (HMP-00-CH-10-0009).

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Experimental Study on the Acellular Dermal Matrix Graft for the Root Coverage in Dog (성견에서 ADM(acellular dermal matrix)의 치근피개 효과에 관한 실험적 연구)

  • Cho, Min-Young;Lee, Seoung-Ho;Han, Keum-Ah;Lee, Jun-Young;Jeon, Hye-Ran;Kang, Na-Ra;Kim, Myung-Rae
    • Journal of Periodontal and Implant Science
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    • v.36 no.1
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    • pp.239-251
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    • 2006
  • 결합조직이식을 이용한 치근피개 술식에 많은 관심이 집중되고 있다. 최근에는 acellular dermal matrix가 자가 결합조직 이식편의 대체물로써 소개되었다. 본 실험의 목적은 치근피개를 위해 acellular dermal matrix을 사용시, 그 임상 효과 빚 조직 치유 양상을 평가하고, 이를 자가 결합조직 이삭시의 결과와 비교하기 위함이다. 3마리의 성견에 인위적인 치은 퇴축부 형성을 위해서, 상악 좌우견치의 협측에서 각화치은을 모두 제거하고, 법랑백악경계부로부터 12mm 정도 치조골을 삭제한 후에 판막을 봉합하였다. 그 후 35일을 치유 기간으로 부여하였다. 총 6 부위의 결손부가 실험에 포함되었고, 각각 3 부위씩이 대조군과 실험군으로 분류되었다. 실험군에서는 acellular dermal matrix 이식과 치관측 변위 판막을 시행하였고, 대조군에서는 치은 퇴축부위에 자가 결합조직 이식과 치관측 변위 판막을 시행하였다. 치주낭 깊이, 임상적 부착 수준, 치은 퇴축 높이, 각화조직 높이 등을 인위적 결손부 형성전, 치은 피개술 시행 직전, 피개술 시행후 4주 경과시에 각각 측정하였다. 술후 4주시에, 상악 좌우 견치 부위에서 시편을 얻어 조직학적으로 관찰하고 Wilcoxon signed rank test 와 Mann-Whitney U test으로 통계처리하였다. 임상결과 관찰시, 대조군과 실험군 모두에서, 술전과 비교시 치은 퇴축 감소와 각화조직의 증가, 임상 부착수준의 개선이 나타났다.(p ( 0.05) 평균 치근 피개율은 실험군에서 61.33(5.67%(n=3), 대조군에서 55.67(5.67%(n=3) 이었고, 대조군과 실험군에서 임상결과에서는 통계학적으로 유의성 있는 차이는 없었다.(p ( 0.05). 조직학상으로는, 두 군 모두에서 이식편이 수여부에 잘 융화되어 있었고 비슷한 치유 양상을 보였다. 이상의 실험결과에 의하면, Acellular dermal matrix은 치근피개술 시행시에 결합조직 이식편의 대용품으로 사용할 수 있고 비슷한 피개 결과를 얻을수 있었다.

INFLUENCE OF LIGHT SOURCE AND CURING TIME ON SURFACE HARDNESS OF RESIN COMPOSITES (중합 광원과 중합 시간이 복합레진의 표면 경도에 미치는 영향)

  • Bae, Sang-Man;Lee, Kwang-Hee;Kim, Dae-Eup;Ahn, Ho-Young
    • Journal of the korean academy of Pediatric Dentistry
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    • v.28 no.2
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    • pp.199-206
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    • 2001
  • The purpose of study was to compare the plasma arc light with the halogen light in compostie resin curing. Three composite resin materials(Z-100, 3M, USA; Tetric Ceram, Vivadent, Liechtenstein; SureFil, Dentsply, USA) were filled in the teflon molds (4mm in diameter and 2, 3, 4, 5mm in thickness) and cured with either the conventional low-intensity light curing unit with a halogen lamp (Optilux 360, Demetron, U.S.A.) for duration of 40 seconds or with the high-intensity light curing unit with a plasma arc lamp (Flipo, Lokki, France) for duration of 3, 6, and 9 seconds. The intensity of halogen light was about $370mW/cm^2$ and that of plasma light was about $1,900mW/cm^2$. After one week, the surface hardnesses of both the top and the bottom of the resin samples were measured with a microhardness tester(MXT70, Matsuzawa, Japan). There were significant differences in the hardness between the top and the bottom of the resin samples except the 2mm thickness samples cured by halogen light for 40s or by plasma light for 9s. There was no significant difference between the hardness values of the top surfaces of the thickness groups. The hardness values of the bottom surfaces decreased as the curing time decreased and as the thickness of resin samples increased, and the three kinds of resin composites showed similar patterns. The results suggest that the halogen light for 40 seconds might be able to cure greater depth of resin composites than the plasma light for 3, 6, or 9 seconds.

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International Airfares and Application of Competition Laws (국제항공운임과 국내 경쟁법규의 적용)

  • Shin, Dong-Chun
    • The Korean Journal of Air & Space Law and Policy
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    • v.26 no.1
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    • pp.93-125
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    • 2011
  • The International Civil Aviation Convention (Chicago Convention) has been a backbone of international air transport system whereby air transport between States should be based on bilateral agreements, and in particular, international airfares, which are set up through IATA(International Air Transport Association) rate-fixing machinery could be approved by the governments concerned. International airfares are fares for transporting passenger and freight and their conditions between two or more countries. However, since U.S. pursued th deregulation policy in 1978 whereby routes, capacity and fares could be freely determined by airlines, many States have been following so called open-skies agreements. In many cases, aeronautical and competent authorities have been reviewing whether airlines' commercial activities including air fares could possibly conflict with free competition rules envisaged in relevant laws and regulations. As competition among airlines gets intense, airlines often resort to cooperation with other airlines in the forms such as equity exchange, M&A, code-sharing, fares consultation and resource pooling, mainly with a view to effectively use resources available and to avoid monopoly situation resulting from excessive and destructive competition among players. Whereas bearing in mind that application of competition laws is important to secure consumers' interests by preventing airlines's malpractices such as bargaining exorbitant fares, it is also important to comprehensively consider as many factors as possible, from that unilateral measure by governments may bring about retaliatory measures by the governments affected, to that airlines' cooperative practices may rather increase consumers' benefits by lowering air fares.

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A Study on Mental Injury Suffered by Passengers in International Air law (국제항공법상 정신적 손해에 관한 연구)

  • Cho, Hong-Je;Ahn, Jin-Young
    • The Korean Journal of Air & Space Law and Policy
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    • v.25 no.1
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    • pp.55-95
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    • 2010
  • The meaning and application of 'lesion corporelle' in the context of a variety of mental or psychic injuries is less clear, while there is very little disagreement about its literal translation. U.S. Court decisions since Floyd allow recovery for a range of claims involving emotional injury under Article 17; in some cases there is no recovery, while in others there is full recovery, depending on the allegations and the nexus between the alleged injury and any related or accompanying physical injury. Courts are in agreement that pure emotional injury is not compensable under the Convention. Most courts agree that emotional injury is not compensable in those cases where it has resulted only in physical manifestations such as weight loss or sleeplessness. At the same time, most courts generally agree that emotional injury is compensable if it proximately flows from a physical injury. The issue as to whether the courts would associate PTSD with bodily injury as envisioned in the present Warsaw structure or even the new regime reflected in the Convention proposed by ICAO would largely depend on the extent to which courts would be ready to embrace the compelling scientific findings with regard to mental distress and its application within the term 'bodily injury'. Taken together, these points when the current under Article 17 of the Warsaw Convention, 'physical injury' notion of 'mental injury' is to be extended. Of course, the current terms of the Warsaw Convention have been maintaining a precedent for many countries appear to have a statue of the original purpose of the treaty does not contribute to the diffusion. Therefore, in future treaties 'bodily injury', the term 'injury', the term 'personal injury' or 'health undermined' the term should be replaced or revised.

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