• Asia pacific journal of information systems
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• 제22권4호
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• pp.101-123
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• 2012

Currently, Social Media, it has widely a renown keyword and its related social trends and businesses have been fastly applied into various contexts. Social media has become an important research area for scholars interested in online technologies and cyber space and their social impacts. Social media is not only including web-based services but also mobile-based application services that allow people to share various style information and knowledge through online connection. Social media users have tendency to common identity- and bond-attachment through interactions such as 'thumbs up', 'reply note', 'forwarding', which may have driven from various factors and may result in delivering information, sharing knowledge, and specific experiences et al. Even further, almost of all social media sites provide and connect unknown strangers depending on shared interests, political views, or enjoyable activities, and other stuffs incorporating the creation of contents, which provides benefits to users. As fast developing digital devices including smartphone, tablet PC, internet based blogging, and photo and video clips, scholars desperately have began to study regarding diverse issues connecting human beings' motivations and the behavioral results which may be articulated by the format of antecedents as well as consequences related to contents that people create via social media. Social media such as Facebook, Twitter, or Cyworld users are more and more getting close each other and build up their relationships by a different style. In this sense, people use social media as tools for maintain pre-existing network, creating new people socially, and at the same time, explicitly find some business opportunities using personal and unlimited public networks. In terms of theory in explaining this phenomenon, social capital is a concept that describes the benefits one receives from one's relationship with others. Thereby, social media use is closely related to the form and connected of people, which is a bridge that can be able to achieve informational benefits of a heterogeneous network of people and common identity- and bonding-attachment which emphasizes emotional benefits from community members or friend group. Social capital would be resources accumulated through the relationships among people, which can be considered as an investment in social relations with expected returns and may achieve benefits from the greater access to and use of resources embedded in social networks. Social media using for their social capital has vastly been adopted in a cyber world, however, there has been little explaining the phenomenon theoretically how people may take advantages or opportunities through interaction among people, why people may interactively give willingness to help or their answers. The individual consciously express themselves in an online space, so called, common identity- or bonding-attachments. Common-identity attachment is the focus of the weak ties, which are loose connections between individuals who may provide useful information or new perspectives for one another but typically not emotional support, whereas common-bonding attachment is explained that between individuals in tightly-knit, emotionally close relationship such as family and close friends. The common identify- and bonding-attachment are mainly studying on-offline setting, which individual convey an impression to others that are expressed to own interest to others. Thus, individuals expect to meet other people and are trying to behave self-presentation engaging in opposite partners accordingly. As developing social media, individuals are motivated to disclose self-disclosures of open and honest using diverse cues such as verbal and nonverbal and pictorial and video files to their friends as well as passing strangers. Social media context, common identity- and bond-attachment for self-presentation seems different compared with face-to-face context. In the realm of social media, social users look for self-impression by posting text messages, pictures, video files. Under the digital environments, people interact to work, shop, learn, entertain, and be played. Social media provides increasingly the kinds of intention and behavior in online. Typically, identity and bond social capital through self-presentation is the intentional and tangible component of identity. At social media, people try to engage in others via a desired impression, which can maintain through performing coherent and complementary communications including displaying signs, symbols, brands made of digital stuffs(information, interest, pictures, etc,). In marketing area, consumers traditionally show common-identity as they select clothes, hairstyles, automobiles, logos, and so on, to impress others in any given context in a shopping mall or opera. To examine these social capital and attachment, we combined a social capital theory with an attachment theory into our research model. Our research model focuses on the common identity- and bond-attachment how they are formulated through social capitals: cognitive capital, structural capital, relational capital, and individual characteristics. Thus, we examined that individual online kindness, self-rated expertise, and social relation influence to build common identity- and bond-attachment, and the attachment effects make an impact on both the willingness to help, however, common bond seems not to show directly impact on information sharing. As a result, we discover that the social capital and attachment theories are mainly applicable to the context of social media and usage in the individual networks. We collected sample data of 256 who are using social media such as Facebook, Twitter, and Cyworld and analyzed the suggested hypotheses through the Structural Equation Model by AMOS. This study analyzes the direct and indirect relationship between the social network service usage and outcomes. Antecedents of kindness, confidence of knowledge, social relations are significantly affected to the mediators common identity-and bond attachments, however, interestingly, network externality does not impact, which we assumed that a size of network was a negative because group members would not significantly contribute if the members do not intend to actively interact with each other. The mediating variables had a positive effect on toward willingness to help. Further, common identity attachment has stronger significant on shared information.

• 마케팅과학연구
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• 제18권1호
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• pp.1-31
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• 2008

신뢰는 인간관계에서 동서고금을 통해 언제나 주목을 받아온 주제였으며, 신뢰의 중요성은 경영학 분야는 물론 인간생활의 모든 분야에서 이미 오랜 전부터 인식되어 왔다. 그러나 대부분의 연구는 주로 개인 간의 신뢰인 종업원에 대한 신뢰에만 집중하는 단일 차원적 관점에서 연구되어 왔다. 본 연구는 이와 같이 지금까지 주로 단일차원으로 연구되어 온 신뢰 대상을 판매원, 제품/서비스, 그리고 기업의 3차원으로 다차원화하여 이들 신뢰 대상이 재구매 의도에 미치는 영향을 검증하였다. 서울, 대구 경북지역의 거주자로 백화점에서 구매 경험이 있는 남녀 고객을 대상으로 수집된 자료를 분석한 결과, 기존 연구들에서 주로 다루어진 판매원신뢰뿐만 아니라 기업신뢰와 제품/서비스신뢰 또한 고객신뢰의 중요한 대상으로 나타나, 신뢰 대상은 다차원적인 구성개념임이 밝혀졌다. 이들 3차원의 신뢰는 모두 재구매 의도에 유의한 영향을 미치는 것으로 나타났으며, 특히 기업신뢰가 판매원신뢰와 제품/서비스신뢰보다 재구매 의도에 더 영향을 미치는 것으로 나타났다. 판매원신뢰와 제품/서비스신뢰의 영향요인으로 역량과 선의를, 기업신뢰의 영향요인으로 기업 평판과 물리적 환경을 설정하여 검증한 결과 역량과 선의는 판매원신뢰와 제품/서비스신뢰 모두에 유의한 영향을 미치는 것으로 나타났다. 기업신뢰의 경우, 평판은 유의한 영향을 미치는 것으로 나타났으나, 물리적환경은 유의한 영향을 미치지 않은 것으로 나타났다.

• 마케팅과학연구
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• 제18권2호
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• pp.19-45
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• 2008

본 연구는 인터넷쇼핑몰 비주얼 머천다이징의 주요차원을 고객이 쇼핑몰에 진입한 후 정보탐색과 대안평가를 거치는 등의 쇼핑과정을 토대로 AIDA모형 관점에서 점포, 제품, 촉진에 초점을 맞추었다. VMD의 주요차원(primary dimensions)으로는 점포디자인, 머천다이징, 그리고 머천다이징단서로 구분하였다. 선행연구 결과를 토대로 점포다자인의 하위차원으로는 차별성, 간결성, 위치확인성을, 머천다이즈의 하위차원으로는 제품구색, 명성, 정보성을, 그리고 머천다이징단서의 하위차원으로는 제품추천 및 링크를 설정하여 VMD태도와의 관계를 탐색적으로 조사하였다. 연구결과 이들 세 차원은 종속변수에 유의한 정의 영향을 미치는 것으로 나타났다.

• 한국가정과교육학회지
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• 제24권2호
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• pp.117-134
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• 2012

본 연구의 목적은 가정과교육에서 창의 인성 교육에 대한 가정과 교사의 관심 단계와 실행 수준, 그리고 실행 실태를 알아보는데 있다. 연구 자료는 전국의 중학교 가정과 교사를 대상으로 체계적 표집과 편의 표집을 하여 우편과 이메일을 통해 설문지를 배포하고 회수된 187부를 최종 분석에 사용하였다. 조사 도구는 주로 Hall(1987)이 개발한 혁신에 대한 교사의 관심도와 실행 수준에 대한 질문지를 수정 보완하여 사용하였고 그 외는 선행연구를 기초하여 개발하였으며 타당도와 신뢰도를 검증하였다. 자료는 SPSS/window(12.0) 프로그램을 이용하여 빈도, 백분율, 평균, 표준편차, t-test, ANOVA를 실시하였다. 본 연구를 통해 밝혀진 결과를 요약하면 다음과 같다. 첫째, 창의 인성 교육에 대한 가정과 교사의 관심 단계는 정보적 관심 단계(85.51)가 가장 높았으며 다음으로 개인적 관심 단계(85.18), 운영적 관심 단계(81.88), 지각적 관심 단계(82.15), 강화적 관심 단계(68.80), 협동적 관심 단계(61.97), 그리고 결과적 관심단계(59.76)의 순으로 나타났다. 둘째, 창의 인성 교육에 대한 가정과 교사의 실행 수준은 기계적 실행 수준(수준 3; 21.4%)이 가장 많았으며, 다음으로 탐색 수준(수준 1; 20.9%), 정교화 수준(수준 5; 17.1%), 사용하지 않는 수준(수준 0; 15.0%), 준비 수준(수준 2; 10.2%), 통합 수준(수준 6; 5.9%), 갱신 수준(수준 7; 4.8%), 일상화 수준(수준 4; 4.8%) 순이었다. 셋째, 창의 인성 교육에 대한 가정과 교사의 실행 실태를 조사한 결과, 반 이상의 가정과 교사(56.1%)는 가정과 수업에서 인성 교육에 치중하고 있으며, 31.0%의 교사는 창의 인성 교육을 모두 실행한다고 응답하였다. 반면 소수의 교사(6.4%)는 창의성 교육을 실행한다고 응답하였고 같은 수의 교사(6.4%)는 창의성과 인성 교육 어느 것도 실행하지 않는다고 응답하였다. 가정과 교사의 창의 인성 교육 요소의 실행 정도를 조사한 결과, 창의 인성 교육 요소의 실행은 평균은 5점 만점에서 3.76이었고 창의성 요소의 평균은 3.59, 인성 요소의 평균은 3.94로 보통보다 높았다. 창의성 교육 요소의 실행 정도에 대해서, 개방성/민감성(3.97)을 가장 많이 실행하였고 다음으로 문제해결능력(3.79), 호기심/흥미(3.73), 비판적 사고(3.68), 논리/분석적 사고(3.63), 문제발견능력(3.61), 독창성(3.57), 유추성(3.47), 유창성/융통성(3.46), 정교성(3.46), 상상력(3.37), 몰입/공감(3.37)의 순으로 실행하였다. 인성 교육 요소는 실천력(4.07)을 가장 많이 실행하였고, 다음으로 협동/배려/공정(4.06), 자기관리능력(4.04), 시민의식(4.04), 진로개발능력(4.03), 환경친화능력(3.95), 책임(감)/소유(3.94), 의사결정능력(3.89), 신뢰/정직/약속(3.88), 자율성(3.86), 글로벌역량(3.55)의 순으로 실행한 것으로 나타났다. 창의 인성 교육을 실행할 때 어려운 점으로, 많은 가정과 교사(64.71%)는 창의 인성 교육을 실행할 수업 자료가 부족한 데 있다고 하였으며, 40.11%의 교사는 창의 인성 교육의 연수 기회가 적은데 있다고 응답하였다. 한편 38.50%의 가정과 교사는 창의 인성 교육에 대한 평가 기준을 설정하거나 평가 도구를 개발하는 것이 어렵다고 응답하였고, 25.67%의 교사는 창의 인성 교육 방법을 모른다고 응답하였다. 창의 인성 교육 실행을 위해서 필요한 지원에 대해서, '창의 인성 교육과 관련된 학생들의 체험활동의 확대'(4.34), '창의성과 인성을 중시하는 가정과 수업 문화 조성'(4.29), '학생 발달 단계에 적합한 창의 인성 교육 내용'(4.27), '창의 인성 교육을 담당할 교수 인력 확보'(4.21), '창의 인성 교육의 개념과 가치 확립'(4.09), '지역 사회 기업 등과 연계한 창의 인성 교육 추진'(3.94)의 순으로 응답하였다.

• 대한의용생체공학회:의공학회지
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• 제6권2호
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• pp.1-8
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• 1985

The wall shear stress in the vicinity of end-to end anastomoses under steady flow conditions was measured using a flush-mounted hot-film anemometer(FMHFA) probe. The experimental measurements were in good agreement with numerical results except in flow with low Reynolds numbers. The wall shear stress increased proximal to the anastomosis in flow from the Penrose tubing (simulating an artery) to the PTFE: graft. In flow from the PTFE graft to the Penrose tubing, low wall shear stress was observed distal to the anastomosis. Abnormal distributions of wall shear stress in the vicinity of the anastomosis, resulting from the compliance mismatch between the graft and the host artery, might be an important factor of ANFH formation and the graft failure. The present study suggests a correlation between regions of the low wall shear stress and the development of anastomotic neointimal fibrous hyperplasia(ANPH) in end-to-end anastomoses. 30523 T00401030523 ^x Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70$\pm$1.32mmHg/min)compared to CF dialyzers(4.32$\pm$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers. 30527 T00401030527 ^x For quantitative measurement of reflected light from a clinical diagnostic strip, a prototype old reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate reflectance parameters. The strip was illuminated at 45˚c through optical fiber and the intensity of reflected light was determined at rectanguLat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500, 550, 570 and 610nm) for blood glucose strip. For higher concentration than 300mg/41 about glucose, a saturation state of abforbance was observed at 500, 550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm. 30535 T00401030535 ^x Radiation-induced fibrosarcoma tumors were grown on the flanks of C3H mice. The mice were divided into two groups. One group was injected with Photofrin II, intravenously (2.5mg/kg body weight). The other group received no Photofrin II. Mice from both groups were irradialed for approximately 15 minutes at 100, 300, or 500 mW/cm2 with the argon (488nm/514.5 nm), dye(628nm) and gold vapor (pulsed 628 nm) laser light. A photosensitizer behaved as an added absorber. Under our experimental conditions, the presence of Photolfrin II increased surface temperature by at least 40% and the temperature rise due to 300 mW/cm2 irradiation exceeded values for hyperthermia. Light and temperature distributions with depth were estimated by a computer model. The model demonstrated the influence of wavelength on the thermal process and proved to be a valuable tool to investigate internal temperature rise. 30536 T00401030536 ^x We investigated the structural geometry of thirty-eight Korean femurs. The purpose of this study is to identify major geometrical differences between Korean femurs 3nd others that we believe belong to Caucasians so that we would be able to get insights into the femoral component design that fits Asians including Koreans. We utilized computerized tomography (CT) images of femurs extracted from cadavers. The CT images were transformed into bitmap data by using a film scanner, and then analyzed by using a commercially available software called Image v.1.0 and a Macintosh IIci computer.The resulting data were compared with already published data. The major results show that the geometry of the Korean femurs is significantly different from that of Caucasians: (1) the anteversion angle and the canal flare index are greater by the amount of approximately 8˚ and 0.5, respectively, (2) the shape of the isthmus cross section is more round, and (3) the distance between the teaser trochanter and the proximal border of the isthmus is shelter by about 15 mm. The results suggested that the femoral component suitable for Asians should be different from the currently-used components designed and manufactured mostly by European or American companies. 30537 T00401030537 ^x It is well known that nonlinear propagation characteristics of the wave in the tissue may give very useful information for the medical diagnoisis. In this paper, a new method to detect nonlinear propagation characteristics of the internal vibration in the tissue for the low frequency mechanical vibration by using bispectral analysis is proposed. In the method, low frequency vibration of f0( = 100Hz) is applied on the surface of the object, and the waveform of the internal vibration x (t) is measured from Doppler frequency modulation of silmultaneously transmitted probing ultrasonic waves. Then, the bispectra of the signal x (t) at the frequencies (f0, f0) and (f0, 2f0) are calculated to estimate the nonlinear propagation characteristics as their magnitude ratio, w here since bispectrum is free from the gaussian additive noise we can get the value with high S/N. Basic experimental system is constructed by using 3.0 MHz probing ultrasonic waves and the several experiments are carried out for some phantoms. Results show the superiority of the proposed method to the conventional method using power spectrum and also its usefulness for the tissue characterization. 30541 T00401030541 ^x This paper describes the implementation of a computerized radial pulse diagnosis by aids of a clinical expert. On this base, we composed of the radial pulse diagnosis system in korean traditional medicine. The system composed of a radial pulse wave detection system and a radial pulse diagnosis system. With a detection system, we detected Inyoung and Cheongu radial pulse wave and processed it. Then, we have got the characteristic parameters of radial pulse wave and also quantified that according to the method of Inyoung-Cheongu Comparison Radial Pulse Diagnosis. We defined the jugement standard of radial pulse diagnosis system and then we confirmed the possibility for realization of automatic radial pulse diagnosis in korean traditional medicine. 30545 T00401030545 ^x Microspheres are expected to be applied to biomedical areas such as solid-phase immunoassays, drug delivery systems, immunomagnetic cell separation. To synthesize microspheres for biomedical application, "two stage shot growth method" was developed. The uniformity ratio of synthesized microspheres was always smaller than 1.05. And the surface charge density (or the number of ionizable functional groups) of the microspheres synthesized by "two stage shot growth method" was 6~13 times higher than that of the microspheres synthesized by conventional seeded batch copolymerization. As a previous step for biomedical application, adsorption experiments of bovine albumin on microspheres were carried out under various conditions. The maximum adsorbed amount was obtained in the neighborhood of pH 4.5. Isoelectric point of bovine albumin is pH 5.0, so experimental result shows that it shifted to acid area. The adsorption isotherm was obtained, the plateau region was always reached at 2.Og/L (bulk concentration of bovine albumin).The effect of the kind and the amount of surface functional group was also examined. 30575 T00401030575 ^x A medical image workstation was developed using multimedia technique. The system based on PC-486DX was designed to acquire medical images produced by medical imaging instruments and related audio information, that is, doctors' reporting results. Input information was processed and analyzed, then the results were presented in the form of graph and animation. All the informations of the system were hierarchically related with the image as the apex. Processing and analysis algorithms were implemented so that the diagnostic accuracy could be improved. The diagnosed information can be transferred for patient diagnosis through LAN(local area network). 30592 T00401030592 ^x In the conventional infrared imaging system, complex infrared lens systems are usually used for directing collimated narrow infrared beams into the high speed 2-dimensional optic scanner. In this paper, a simple reflective infrared optic system with a 2-dimensional optic scanner is proposed for the realization of medical infrared thermography system. It has been experimentally proven that the intfrared thermography system composed of the proposed optic system has the temperature resolution of 0.1˚c under the spatial resolution of lmrad, the image matrix size of 256 X 240, and tile imaging time of 4 seconds. 30593 T00401030593 ^x In this paper, MIIS (Medical Image Information System) has been designed and implemented using INGRES RDBMS, which is based on a client/server architecture. The implemented system allows users to register and retrieve patient information, medical images and diagnostic reports. It also provides the function to display these information on workstation windows simultaneously by using the designed menu-driven graphic user interface. The medical image compression/decompression techniques are implemented and integrated into the medical image database system for the efficient data storage and the fast access through the network. 30594 T00401030594 ^x In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality. 30608 T00401030608 ^x Laboratory information system (LIS) is a key tool to manage laboratory data in clinical pathology. Our department has developed an information system for routine hematology using down-sized computer system. We have used an IBM 486 compatible PC with 16MB main memory, 210 MB hard disk drive, 9 RS-232C port and 24 pin dot printer. The operating system and database management system were SCO UNIX and SCO foxbase, respectively. For program development, we used Xbase language provided by SCO foxbase. The C language was used for interface purpose. To make the system use friendly, pull-down menu was used. The system connected to our hospital information system via application program interface (API), so the information related to patient and request details is automatically transmitted to our computer. Our system interfaced with fwd complete blood count analyzers(Sysmex NE-8000 and Coulter STKS) for unidirectional data tansmission from analyzer to computer. The authors suggests that this system based on down-sized computer could provide a progressive approach to total LIS based on local area network, and the implemented system could serve as a model for other hospital's LIS for routine hematology. 30609 T00401030609 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atelocollagen was produced: The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength. 30618 T00401030618 ^x This paper is a study on the design of adptive filter for QRS complex detection. We propose a simple adaptive algorithm to increase capability of noise cancelation in QRS complex detection with two stage adaptive filter. At the first stage, background noise is removed and at the next stage, only spectrum of QRS complex components is passed. Two adaptive filters can afford to keep track of the changes of both noise and QRS complex. Each adaptive filter consists of prediction error filter and FIR filter The impulse response of FIR filter uses coefficients of prediction error filter. The detection rates for 105 and 108 of MIT/BIH data base were 99.3% and 97.4% respectively. 30619 T00401030619 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed and produced a composite that is consisted of calcium phosphate and collagen. Human umbilical cord origin pepsin treated type I atelocollagen was used as the structural matrix, by which sintered or non-sintered carbonate apatite was encapsulated to form an inorganic-organic composite. With cross linking atelocollagen by UV ray irradiation, the resistance to both compressive and tensile strength was increased. Collagen degradation by the collagenase induced collagenolysis was also decreased. 30620 T00401030620 ^x We have developed a monoleaflet polymer valve as an inexpensive and viable alternative, especially for short-term use in the ventricular assist device or total artificial heart. The frame and leaflet of the polymer valve were made from polyurethane, To evaluate the hemodynamic performance of the polymer valve a comparative study of flow dynamics past a polymer valve and a St. Jude Medical prosthetic valve under physiological pulsatile flow conditions in vitro was made. Comparisons between the valves were made on the transvalvular pressure drop, regurgitation volume and maximum valve opening area. The polymer valve showed smaller regurgitation volume and transvalvular pressure drop compared to the mechanical valve at higher heart rate. The results showed that the functional characteristics of the polymer valve compared favorably with those of the mechanical valve at higher heart rate. 30621 T00401030621 ^x Explosive evaporative removal process of biological tissue by absorption of a CW laser has been simulated by using gelatin and a multimode Nd:YAG laser. Because the point of maximun temperature of laser-irradiated gelatin exists below the surface due to surface cooling, evaporation at the boiling temperature is made explosively from below the surface. The important parameters of this process are the conduction loss to laser power absorption (defined as the conduction-to-laser power parameter, Nk), the convection heat transfer at the surface to conduction loss (defined as Bi), dimensionless extinction coefficient (defined as Br.), and dimensionless irradiation time (defined as Fo). Dependence of Fo on Nk and Bi has been observed by experiment, and the results have been compared with the numerical results obtained by solving a 2-dimensional conduction equation. Fo and explosion depth (from the surface to the point of maximun temperature) are increased when Nk and Bi are increased.To find out the minimum laser power for explosive evaporative removal process, steady state analysis has been also made. The limit of Nk to induce evaporative removal, which is proportional to the inverse of the laser power, has been obtained. 30622 T00401030622 ^x N1 and N2 gross neural action potentials were measured from the round window of the guinea pig cochlea at the onset of the acoustic stimuli. N1-N2 audiograms were made by means of regulating stimulant intensities in order to produce constant N1-N2 potentials as criteria for different input tone pip frequencies. The lowest threshold was measured with an input tone pip I5 dB SPL in intensity and 12 KHz in frequency when the animal was in normal physiological condition. The procedure of experimental measurements is explained in detail. This experimental approach is very useful for the investigation of the Cochlear function. Both noN1inear and active functions of the Cochlea can be monitored by N1-N2 audiograms. 30623 T00401030623 ^x In electrical impedance tomography(EIT), we use boundary current and voltage measurements toprovide the information about the cross-sectional distribution of electrical impedance or resistivity. One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.77 NMR machine. We implemented a resistivity mage reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the mage reconstruction algorithm and furture direction of the research. 30624 T00401030624 ^x A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid eland cells image that was diagnosed as normal and abnormal (two types of abnormal: follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. A9 a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11% was obtained for Thyroid Gland cells. 30625 T00401030625 ^x An electrical stimulator was designed to induce locomotion for paraplegic patients caused by central nervous system injury. Optimal stimulus parameters, which can minimize muscle fatigue and can achieve effective muscle contraction were determined in slow and fast muscles in Sprague-Dawley rats. Stimulus patterns of our stimulator were designed to simulate electromyographic activity monitored during locomotion of normal subjects. Muscle types of the lower extremity were classified according to their mechanical property of contraction, which are slow muscle (msoleus m.) and fast muscle (medial gastrocneminus m., rectus femoris m., vastus lateralis m.). Optimal parameters of electrical stimulation for slow muscles were 20 Hz, 0.2 ms square pulse. For fast muscle, 40 Hz, 0.3 ms square pulse was optimal to produce repeated contraction. Higher stimulus intensity was required when synergistic muscles were stimulated simultaneously than when they were stimulated individually. Electrical stimulation for each muscle was designed to generate bipedal locomotion, so that individual muscles alternate contraction and relaxation to simulate stance and swing phases. Portable electrical stimulator with 16 channels built in microprocessor was constructed and applied to paraplegic patients due to lumbar cord injury. The electrical stimulator restored partially gait function in paraplegic patients. 30626 T00401030626 ^x Two-Dimensional modelling of the Cochlear biomechanics is presented in this paper. The Laplace partial differential equation which represents the fluid mechanics of the Cochlea has been transformed into two-dimensional electrical transmission line. The procedure of this transformation is explained in detail. The comparison between one and two dimensional models is also presented. This electrical modelling of the basilar membrane (BM) is clearly useful for the next approach to the further. Development of active elements which are essential in the producing of the sharp tuning of the BM. This paper shows that two-dimension model is qualitatively better than one-dimensional model both in amplitude and phase responses of the BM displacement. The present model is only for frequency response. However because the model is electrical, the two-dimensional transmission line model can be extended to time response without any difficult. 30627 T00401030627 ^x A method has been proposed for the fully automatic detection of left ventricular endocardial boundary in 2D short axis echocardiogram using geometric model. The procedure has the following three distinct stages. First, the initial center is estimated by the initial center estimation algorithm which is applied to decimated image. Second, the center estimation algorithm is applied to original image and then best-fit elliptic model estimation is processed. Third, best-fit boundary is detected by the cost function which is based on the best-fit elliptic model. The proposed method shows effective result without manual intervention by a human operator. 30628 T00401030628 ^x The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan's method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements. 30638 T00401030638 ^x A new neural network architecture for the recognition of patterns from images is proposed, which is partially based on the results of physiological studies. The proposed network is composed of multi-layers and the nerve cells in each layer are connected by spatial filters which approximate receptive fields in optic nerve fields. In the proposed method, patterns recognition for complicated images is carried out using global features as well as local features such as lines and end-points. A new generating method of matched filers representing global features is proposed in this network. 30659 T00401030659 ^x An implementation scheme of the magnetic nerve stimulator using a switching mode power supply is proposed. By using a switching mode power supply rather than a conventional linear power supply for charging high voltage capacitors, the weight and size of the magnetic nerve stimulator can be considerably reduced. Maximum output voltage of the developed magnetic nerve stimulator using the switching mode power supply is 3, 000 volts and switching time is about 100 msec. Experimental results or human nerve stimulations using the developed stimulator are presented. 30768 T00401030768 ^x In this paper, we describe the design methodology and specifications of the developed module-based bedside monitors for patient monitoring. The bedside monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and SpO2 with Plethysmograph.SpO2 with Plethysmograph.

• 중소기업연구
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• 제31권2호
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• pp.103-120
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• 2009

창업보육센터는 창업을 준비하는 예비창업자 및 신규 창업자에게 사업을 영위하는데 필요한 자원 및 서비스를 제공하고, 사업을 수행하는 과정에서 발생되는 다양한 문제의 해결에 도움을 주고 있다. 그러나 이러한 지원은 상황에 따라 기업의 자생력을 높이기보다는 창업보육센터에 대한 의존도를 높이는 경향이 있다. 본 연구는 창업보육서비스를 제공형태에 따라 인프라 지원, 네트워크 연계 지원, 직접 지원으로 분류한 후에 이들 서비스의 제공이 입주기업의 창업보육센터 의존도에 미치는 영향관계를 살펴보고, 아울러 입주기간에 따른 조절효과를 살펴보았다. 연구결과 세 가지 보육서비스 모두 의존도에 영향을 미치는 것으로 파악되었으며, 입주기간에 따른 조절효과는 기간이 늘어날수록 네트워크 연계 지원서비스에 정의 효과가 있는 반면 직접 지원서비스는 부의 효과가 있는 것으로 파악되었다. 이러한 결과는 입주기간이 늘어감에 따라 직접 지원서비스의 경우에는 입주기업이 센터의 자원을 흡수하여 기업의 역량으로 만들어 가지만, 네트워크 연계 지원서비스는 기업의 센터에 대한 의존도를 높이고 있다는 것을 보여준다. 따라서 신생기업이 자생력을 갖기 위해서는 보육서비스를 보육기간에 따라 차별적으로 제공해야 한다는 시사점을 제시하고 있다.

• 시큐리티연구
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• 제40호
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• pp.209-242
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• 2014

이 연구는 사회적 문제로 부각되고 있는 초등학교 범죄예방을 위해 학부모를 대상으로 범죄예방설계(CPTED)요소 인식에 대한 분석을 통해 CPTED의 전략적 요소들이 학생들의 대상 범죄를 효과적으로 예방하는데 도움이 될 수 있는지 이해하고 정책적 제언과 방향 제시에 필요한 기초자료를 제공하려는데 그 목적이 있다. 그러한 연구목적의 달성을 위해 이 연구에서는 핵심적인 틀(Framework)로써 중요도-실행도 분석(IPA: Importance-Performance Analysis)을 선택하였다. 연구의 대상자는 1차 조사 집단은 2010년 경주시 초등학교 학부모 203명과 2차 조사 집단은 2014년 동 지역 초등학교 학부모 297명을 유목적 표집(Purposeful Sampling)으로 선정하였다. 이 연구에서 사용한 설문지는 Martilla & James(1977)가 제시하였던 "중요도-실행도 분석(Important-Performance Analysis: IPA)" 기법을 적용하여 초등학생 학부모들을 대상으로 학생의 범죄예방을 위한 CPTED 전략요소에 대한 인식을 분석하였다. 중요도의 신뢰도(Cronbach's ${\alpha}$)는 1차 집단 0.886, 0.920, 0.895와 2차 집단 0.880, 0.906, 0.878 이었으며, 실행도의 신뢰도는 1차 집단 0.880, 0.917, 0.878과 2차 집단 0.735, 0.840, 0.830이었다. 자료의 분석은 빈도 분석, 신뢰도 분석, 기술통계 분석 및 대응표본 t-Test를 실시하였다. IPA 실행격자를 통해 분석한 바, 초등학교 학부모들의 CPTED 전략요소에 대한 중요도는 전반적으로 매우 높았지만 그 성취도는 구성요소에 따라 편차가 있는 것으로 나타났다. 연구결과, 초등학교 건물 내 외부에서 학생을 대상으로 한 범죄의 불안감을 해소할 수 있는 범죄예방 설계(CPTED)의 중요한 전략요소는 1차 집단의 기계적 감시, 조직적 감시, 그리고 영역성 강화이며 2차 집단의 조사에서 기계적 조직적 요인으로 나타났으며, 경비인력 확충과 정문에 범죄예방 중요요소들 높은 중요도 비해 실행도가 낮아서 시급히 투자가 요청되고 있다고 하겠다. 이 연구의 분석결과는 학생들의 범죄예방을 위해 범죄예방 설계(CPTED) 전략요소를 규명하고 향후 초등학교에서 CPTED의 구성요소를 효과적으로 적용하는 정책적 방향 제시에 기초자료를 활용될 수 있기를 기대한다.

• 대한간호학회지
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• 제25권1호
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• pp.61-79
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• 1995

When children are admitted to hospital, they have to adapt to new and unfamiliar stimuli. Children may respond with fear to stimuli such as pain or unfamiliar experiences. One goal of nursing is to help hospitalized children to adapt effectively to their hospital experience. Accordingly, nurses need to assess childrens' fears of their hospital experience to contribute to the planning of care to alleviate these fears. The problem addressed by this study was to identify and measure hospital-related fears(hereafter called HRF) in hospitalized school-aged children. The study was conceptualized with Roy's model. A descriptive qualitative approach was used first, followed by a quantitative approach. This study was conducted from November 30, 1989 to January 12, 1991. The sample consisted of 395 hospitalized school-aged children selected through an allocated sampling technique in nine general hospitals. The HRF questionnaire (three point likert scale ) was developed by a delphi technique. The data were analyzed by an SAS program. Factor analysis was used for the examination of component factors. Differences in the HRF related to demographic variables were examined by t-test, analysis of variance and the Scheffe test. The crude scores of the HRF scale were transformed into T- scores to calculate the standard scores. The results included the following : 1. Forty-four items were derived from 188 statements identifying the childrens' hospital-re-lated fears. These items clustered into 14 factors, fear of injections, operations, bodily harm others' pain, medical rounds, physical examinations, medical staff, disease process, blood and X-rays, drugs and cockroaches, tests, harsh discipline from parents or staff, being absent from school, and separation from family. The 14 factors was classified into four categories,'pain','the unfamiliar','the un-known' and 'separation'. 2. The reliability of the HRF instruments was .92(Cronbach's alpha). In the factor analysis, Cronbach's alpha coefficients for the 14 factors ranged from .84 to .86 and Cronbach's alpha coefficients for the four categories ranged from .70 to .84. Pearson correlation coefficient scores for relationships among the 14 factors ranged from ,11 to .50, and among the four categories, from ,44 to ,63, indicating their relative independence. 3. The total group HRF score ranged from 45 to 130 in a possible range of H to 132, with a mean of 74.51. The fears identified by the children were, in order, injections, harsh discipline by parents or staff, bodily harm, operations, medical staff, disease process, and medical rounds ; the least feared was others' pain. The fear item with the highest mean score was surgery and the lowest was examination by a doctor. HRF scores were higher for girls than for boys, and for grade 1 students than for grade 6 students. HRF scores were lower for children whose fathers were over 40 than for those whose fathers were in the 30 to 39 age group, and whose mothers were over 35 than for those whose mothers were in the 20 to 34 age group. HRF scores were lower when the mother rather than any other person stayed with the child. The expressed fear of pain, the unfamiliar, the un-known and of separation directs nurses' concern to the threat felt by hospitalized children to their concept of self. This study contributes to the assessment of fears of hospitalized children and of stimuli impinging on those fears. Accordingly, nursing practice will be directed to the alleviation of pain, pre-admission orientation to the hospital setting and routines, initiation of information about procedures and experiences and arrangments for mothers to stay with their children. Recommendations were made for further research in different settings and for development and testing of the instrument.

• 대한치과보철학회지
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• 제45권2호
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• pp.169-181
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• 2007

Statement of problem: Titanium is well known as a proper metal for the dental restorations, because it has an excellent biocompatibility, resistance to corrosion, and mechanical property. However, adhesion between titanium and dental porcelains is related to the diffusion of oxygen to the reaction layers formed on cast-titanium surfaces during porcelain firing and those oxidized layers make the adhesion difficult to be formed. Many studies using mechanical, chemical and physical methods to enhance the titanium-ceramic adhesion have been actively performed. Purpose: This study meant to comparatively analyse the adhesion characteristics depending on different titanium surface coatings after coating the casts and wrought titanium surfaces with Au and TiN. Material and method: In this study, the titanium specimens (CP-Ti, Grade 2, Kobe still Co. Japan) were categorized into cast and wrought titanium. The wrought titanium was cast by using the MgO-based investment(Selevest CB, Selec). The cast and wrought titanium were treated with Au coating($ParaOne^{(R)}$., Gold Ion Sputter, Model PS-1200) and TiN coating(ATEC system, Korea) and the ultra low fusing dental porcelain was fused and fired onto the samples. Biaxial flection test was done on the fired samples and the porcelain was separated. The adhesion characteristics of porcelain and titanium after firing and the specimen surfaces before and after the porcelain fracture test were observed with SEM. The atomic percent of Si on all sample surfaces was comparatively analysed by EDS. In addition, the constituents of specimen surface layers after the porcelain fracture and the formed compound were evaluated by X-ray diffraction diagnosis. Result: The results of this study were obtained as follows : 1. The surface characteristics of cast and wrought titanium after surface treatment(Au, TiN, $Al_2O_3$ sandblasting) were similar and each cast and wrought titanium showed similar bonding characteristics. 2. Before and after the biaxial flection test, the highest atomic weight change of Si component was found in $Al_2O_3$ sandblasted wrought titanium(28.6at.% $\rightarrow$ 8.3at.%). On the other hand, the least change was seen in Au-Pd-In alloy(24.5at.% $\rightarrow$ 9.1at.%). 3. Much amount of Si components was uniformly distributed in Au and TiN coated titanium, but less amount of Si's was unevenly dispersed on Al2O3 sandblasting surfaces. 4. In X-ray diffraction diagnosis after porcelain debonding, we could see $Au_2Ti$ compound and TiN coating layers on Au and TiN coated surfaces and $TiO_2$, typical oxide of titanium, on all titanium surfaces. 5. Debonding of porcelain on cast and wrought titanium surface after the biaxial flection is considered as a result of adhesion deterioration between coating layers and titanium surfaces. We found that there are both adhesive failure and cohesive failure at the same time. Conclusion: These results showed that the titanium-ceramic adhesion could be improved by coating cast and wrought titanium surfaces with Au and TiN when making porcelain fused to metal crowns. In order to use porcelain fused to titanium clinically, it is considered that coating technique to enhance the bonding strength between coating kKlayers and titanium surfaces should be developed first.

• 한국작물학회지
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• 제65권4호
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• pp.346-352
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• 2020

본 연구는 2017년과 2018년의 기상을 가지고 연도별에 따른 대원, 대풍2호, 풍산나물콩의 생육 및 수량구성요소와 종자 크기, 지방, 단백질 함량을 분석하였다. 두 연도별 생육 시기를 보면 대원과 대풍2호에서 2018년이 2017년보다 생육 시기가 빠른 경향을 보였으나 풍산나물콩은 큰 차이가 없었다. 생육 기간 중 R1~R5에서 평균기온은 모든 품종에서 2018년이 2017년보다 높은 반면에 강수량은 풍산나물콩을 제외한 모든 품종에서 2018년이 2017년보다 적었다. 수분모형으로 각 연도의 일별 토양수분함량을 예측한 결과 2018년이 2017년보다 한발 기간이 길었고 개화시부터 종실비대기 이전까지 한발이 지속된 것으로 예측되었다. 종실 수량과 백립중은 2017년이 2018년보다 더 컸으며, 종실 크기는 2017년의 종실이 2018년보다 큰 경향을 나타내었다. 지방 함량은 모든 품종에서 2017년의 지방함량이 2018년보다 많았고 대풍2호, 대원이 연도별 기상에 따른 큰 차이를 보였다. 반면 단백질 함량은 2018년이 2017년보다 높은 경향을 보였지만 품종별 차이를 나타내었다. 결과적으로 2018년의 개화시부터 종실비대시 이전 기간이 2017년보다 평균기온이 높고 강수량이 적은 기상으로 인하여 콩의 수량, 지방 및 단백질 함량에 영향을 주었다. 이번 연구를 통하여 고온과 한발에 내성이 있음과 동시에 품질 감소가 저하되는 콩 품종 개발 및 재배 연구가 활발하게 이루어질 것이라 생각된다.