• 한국통신학회논문지
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• 제38B권10호
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• pp.808-816
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• 2013

최근 들어 우리나라는 제조업 부문의 투자와 고용이 부진하여 잠재성장률이 둔화되는 가운데 신성장동력 및 일자리 창출부문으로서 지식서비스의 역할에 대한 관심이 고조되고 있다. 본 연구에서는 산출 및 고용측면에서 1995년에서 2010년까지의 기간 동안 우리나라의 지식서비스산업의 구조변화 양상을 분석함으로써 지식서비스산업이 경제성장 및 고용창출에 어느 정도의 기여를 하고 있는지를 살펴보고 지식서비스산업 육성을 위한 정책방향을 제시하였다. 지식서비스산업은 여타 산업에 비하여 총산출과 고용의 규모면에 있어서 국가전체에서 차지하는 비중은 그다지 크지 않지만, 타 산업에 비하여 가장 빠른 성장 속도를 보이고 있어서 우리나라의 총산출 증가와 고용 창출에 큰 기여를 한 것으로 나타났다. 하지만 산출증가율과 성장기여도는 점차 하락하고 있어서 지식서비스가 앞으로도 지속적으로 성장동력 및 고용창출에 기여하기 위해서는 생산성 증대를 위한 특별 대책이 요구된다.

• 드라이브 ㆍ 컨트롤
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• 제13권2호
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• pp.19-25
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• 2016

Recently, drivers have begun to regard comfort in the cabin as one of the most important factors in construction equipment like forklifts. Accordingly, it has become more important to design a forklift cabin with a better sound quality as well as lower sound level, which can make a driver more comfortable. In this paper, the correlation between subjective evaluation and Zwicker's sound quality index was analyzed through a blind test by a few workers in forklifts and other construction equipment in several countries. Correlation analysis showed that Loudness and Sharpness were ranked in sequence, and tendencies were different from country to country. Also, contribution analysis for Loudness and Sharpness using operational transfer path analysis (OTPA), which is widely used in the field of noise, vibration, and harshness (NVH), was performed. However, Loudness and Sharpness cannot be used with OTPA directly because there are no linear relationships between the sources and receivers. In this paper, both are calculated by applying the DIN 45631 method with a contribution rate (%) of 1/3 Octave Sound Pressure Level by OTPA method in addition to considering spectral masking.

• 한국토양비료학회지
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• 제42권3호
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• pp.187-191
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• 2009

'Campbell Early', a major grape cultivar, occupies more than 70% of cultivated vineyard areas, however, recommendable standard management system of soil environmental conditions has not been developed yet in Korea. The consideration for the correlation between fruit quality and soil condition in the vineyard is required in the efficient management system of soil. This study was carried out to investigate the optimum soil environmental conditions for 'Campbell Early' grape production with high quality. The results from analyses of correlation between them were used to develop soil management guideline for promoting efficiency in grape production. Soil properties were analyzed from 120 vineyards in Hawsung, Sangju, Yeongdong, Gimcheon, Yeongju, and Yeongwol, major grape production regions. Because there is neither coloring disorder nor delayed coloration in grape production of 'Campbell Early', relative contribution of soil hardness and solid phase to fruit quality and fruit weight was analyzed. Among the soil properties, while cation and soil hardness affected sugar content at the level of 39.3% and 36.8%, respectively, saturated hydraulic conductivity, solid phase, and cation exchange capacity (CEC) showed relatively low contribution to sugar content in the vineyard. The sugar content in grapes was influenced more critically by the chemical properties than the physical ones in the soil of vineyards. While soil hardness and solid phase affected grape weight at the level of 27.8% and 26.0%, respectively, phosphate content, organic matter content, and cation showed low contribution to grape weight. Grape guality such as sugar content and grape weight was affected highly by cation and organic matters. Therefore, cation and organic matter content of soil contributed to fruit quality at the level of 33.8% and 15.5%, respectively, in the vineyard.

• 대한간호학회지
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• 제32권6호
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• pp.803-811
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• 2002

This study was to identify priority areas of nursing research in Korea. Method: A data analysis was done for the PhD subjects (n=133) who responded at the national level two-rounds delphi survey. Subjects were asked to assign a score from 1 to 7 for 29 nursing research areas regarding 3 aspects: the degree of nurses research leadership; the degree of contribution to nursing professions; and the degree of contribution to health and welfare of patients/clients. Result: For the overall three aspects, research area on clinical nursing practice was identified as the first priority, followed by nursing education, home health nursing, nursing research, and chronic disease. For nursing research leadership, research area on clinical nursing practice, nursing education, home health nursing, nursing research, and nursing diagnosis were identified. Concerning contribution to the nursing profession, the first priority was nursing education, followed by clinical nursing practice, nursing research, nursing policy, and home health nursing. Concerning contribution to the health/welfare of patients, clinical nursing practice, home health care, geriatric nursing, chronic disease, and symptom management were ranked as top 5 research priorities. Conclusion: The findings of this national survey will assist in building insights into the research needs of nurses practicing in Korea.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2010년도 춘계학술대회 논문집
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• pp.123-125
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• 2010

As the exterior noise emitted by a vehicle is getting more and more attention, simulated pass-by measurements become more important. This well established method provides information about the total noise emitted by the vehicle. For a vehicle manufacturer it is not only interesting to know about the total noise but also to know how this total exterior noise is composed of different contributions, such as for example the contribution of the engine, the intake or exhaust system. Transfer path analysis (TPA) provides a separation of these contributions for each of the pass-by microphones alongside the track. Presented is a method for fast and efficient determination of the contributions of multiple sources using operational transfer path analysis (OTPA). The calculation of the transfer characteristics between the reference measurement points on the vehicle and the corresponding response points of both microphone lines are carried out while operation of the vehicle. As result of the contribution analysis from operational transfer path analysis, the characteristic noise level as function of the covered distance is displayed for all individual sound sources, thus providing in depth information for sound quality engineering.

• 한국경영과학회지
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• 제30권4호
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• pp.15-25
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• 2005

As implied by the terms of IT productivity Paradox, measuring the Information technology contribution to economic performance has been one of the challenging issues to both policy makers and business professionals. As such, diverse attempts with sophisticate analyses have been reported in the literature to analyze the effect of IT contributions. In this paper, we follow Growth Accounting Method to measure the IT contribution effect to manufacturing firm's economic performance in Korea. Various regression methods and statistical analyses are applied with fourteen years of industry Panel data. Using the Cobb-Douglas function, time lag analysis is made to understand IT effect to economic growth. Instead of capturing data from individual firm, industry level data from the National Statistics Bureau is used for IT capital, non-IT capital, and so on. Statistical analysis following the panel unit test and Panel co-integration test was performed to reveal the exact effect of IT contribution to economic performance. Empirical testing results for non-stationary nature of IT investment effect are reported as well as IT contribution to manufacturing industry's economic performance.

• 디지털융복합연구
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• 제11권1호
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• pp.61-74
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• 2013

수출은 국가 경제 성장에 빠질 수 없는 가장 중요한 요소 중 하나로 자리하고 있어 앞으로 수출을 장려하기 위한 정책의 중요성은 더욱 강조될 것으로 보인다. 기업들이 수출에 어느 정도 기여하고 있으며 어느 경로를 통해 이루어지고 있는지를 파악하는 일은 매우 중요하다. 이를 통해 수출장려 정책을 수립하고 실증적인 근거를 마련할 수 있다. 중소기업이 수출에 미치는 기여도나 경로를 정확하게 파악을 해야 중소기업을 대상으로 수출 장려 정책을 전개할 수 있지만 그렇지 못하면 한계에 부딪칠 수밖에 없을 것이다. 본 연구의 목적은 우리나라 중소기업이 수출에 기여하는 정도를 측정하고 중소기업의 수출 경로를 파악하여 향후 개선 방안을 찾는데 있다. 또한 중소기업의 수출을 활성화하기 위해 적절한 정책방안을 제시하고자 한다.

• 정보과학회 논문지
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• 제42권6호
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• pp.791-800
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• 2015

본 논문은 다중 홉 무선 네트워크 환경에서 브로드캐스트 전송 효율성 뿐 아니라 신뢰도도 우수한 기여도 기반 기회적 플러딩 기법을 제안한다. 브로드캐스트 트리를 전송 결과와 관련 없이 미리 결정하면, 무선 네트워크의 내재적 불안정성으로 지정된 릴레이 노드가 패킷을 수신하지 못할 수 있다. 본 논문에서 제안하는 기여도 기반 기회적 플러딩 기법은 릴레이 노드를 전송 결과를 기반으로 선택하는 기회적 전송의 개념을 사용하여 신뢰도를 제고하였다. 또한 전체 네트워크에 대한 단말 기여도에 따라 릴레이 우선 순위를 조정하여 불필요한 릴레이를 제거하고 전송 효율을 높였다. NS-3 시뮬레이터를 활용하여 제안 기법을 블라인드 플러딩, 그리고 도미넌트 프루닝과 비교하였다. 성능 분석 결과 제안 프로토콜은 블라인드 플러딩에 비해 릴레이 횟수에 기초한 효율 관점에서 35%, 도미넌트 프루닝에 비해 수신 노드 수에 기초한 신뢰도 관점에서 20~70% 수준의 성능 향상을 얻었다.

• Journal of Information Technology Applications and Management
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• 제24권2호
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• pp.39-54
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• 2017

At present, various technologies are rapidly advancing, centering on the concept of virtuality. From the technology of virtual reality, which allows us to experience the senses as if they existed, to the technology of augmented reality, which provides new information or services based on reality, they are no longer strange things for ourselves because we experience them every day and night. Even though the concept of virtual is very familiar in terms of technology, it is not known how individuals accept the concept of virtuality, how they change our way of thinking, and how their behavior changes. This study aims to approach virtuality perceived by the individual from the viewpoint of individual's information processing. Virtuality is defined as the degree to which the situation facing an individual is far from actual reality. An individual can judge the degree of virtuality easily, which is considered to be a psychological distance which is an important factor in personal information processing. In this study, we have confirmed whether the argument is applied to the real world in the context of advertisement. According to the construal level theory, when an individual feels virtuality at a high level, the individual thinks that the situation they are facing is psychologically distant and accordingly has a high level construal. Therefore, it is more influenced by 'advertisement emphasizing symbolic appeal' which is matching with higher level. On the other hand, when an individual feels a low level of virtuality, the individual thinks that the situation they are facing is psychologically near and thus has a low level construal. Therefore, respondents are more sensitive to functional appeal, which is related to lower level. This study has the theoretical contribution in terms that the degree of virtuality affects the psychological distance of the individual. In addition, the results of this study have practical contribution in terms of being able to be actively used in the information delivery strategy centered on the advertisement.

• 한국환경보건학회지
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• 제49권5호
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• pp.262-274
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• 2023

Background: Exposure levels for heavy metals such as lead (Pb), mercury (Hg), and cadmium (Cd) have increased due to human activities. They are known to be a public health concern. Objectives: This study aimed to determine the exposure levels to heavy metals in the blood and urine of South Korean adults and to present the contribution rate of exposure pathways using an exposure algorithm for men aged 19~64, women aged 19~64, and all seniors aged 65 or older. Methods: We analyzed data from the Korean National Environmental Health Survey (KoNEHS) Cycle 4 (2018~2020). A total of 2,646 participants aged ≥19 years were included. Multiple regression analysis was performed to determine the factors affecting heavy metal concentrations. The contribution rate was calculated by applying three exposure algorithms for ingestion, inhalation, and dermal exposure. Results: Factors that commonly affect heavy metal concentrations in blood and urine were gender and age. The main influencing factors for Pb and Cd were education level and smoking status, while frequency of fish consumption and of alcohol consumption were indicated to be the main influencing factors for mercury. The contribution rates of lead and cadmium from food ingestion were 78.03~79.62% and 88.39~92.89%, respectively. Additionally, the highest contribution for mercury was accounted for by food at 81.69~85.77%. As a result of the risk assessment, cadmium was found to pose a potential health risk a with total cancer risk (TCR) of more than 1×10^-6. Conclusions: The KoNEHS could be an important study for determining the level of exposure to heavy metals and their influencing factors. Integrated exposure to heavy metals could assess the main exposure pathways, and this methodology could be applied to exposure management of heavy metals.