• Journal of the Korea Society of Computer and Information
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• v.26 no.10
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• pp.1-7
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• 2021

Recently, since most of the research on correcting speech recognition errors is based on English, there is not enough research on Korean speech recognition. Compared to English speech recognition, however, Korean speech recognition has many errors due to the linguistic characteristics of Korean language, such as Korean Fortis and Korean Liaison, thus research on Korean speech recognition is needed. Furthermore, earlier works primarily focused on editorial distance algorithms and syllable restoration rules, making it difficult to correct the error types of Korean Fortis and Korean Liaison. In this paper, we propose a context-sensitive post-processing model of speech recognition using a LSTM-based sequence-to-sequence model and Bahdanau attention mechanism to correct Korean speech recognition errors caused by the pronunciation. Experiments showed that by using the model, the speech recognition performance was improved from 64% to 77% for Fortis, 74% to 90% for Liaison, and from 69% to 84% for average recognition than before. Based on the results, it seems possible to apply the proposed model to real-world applications based on speech recognition.

• Korean Journal of Social Welfare Studies
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• v.42 no.1
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• pp.371-397
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• 2011

Field practicum is the core of Social Work education and plays a key role in the integration of theory and practice. To maximize the effectiveness of field education, it is important that both the faculty field liaison and field instructor are cooperated. However, the current field education is almost dependent on the supervision by field instructors. This study explores the perception on the areas of supervision by using the Q-methodology. As a result, the perception of faculty field liaison was categorized into three types and field instructors' was two. Their types of perception were partially overlapped rather than contrast. Findings of the study suggested the need for greater collaboration between academia and agencies.

• Journal of electromagnetic engineering and science
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• v.10 no.1
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• pp.28-34
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• 2010

This paper introduces a new U.S. ultra-wideband(UWB: 3.1~10.6 GHz) 1:2 power divider based on a single section Wilkinson type configuration. The divider provides very flat in-band power splitting, high isolation, low insertion loss, sharp roll-off bandpass filtering, and DC blocking characteristics. The circuit consists of a $\lambda$/4 Y resonator, three capacitively coupled $\lambda$/2 short-circuited lines, and a resistor between the two output ports. The circuit structure was simulated with ADS and HFSS, and realized with low-temperature co-fired ceramic(LTCC) green tape, which has a dielectric constant of 7.8. $|S_{11}|$ better than 10 dB, $|S_{21}|$ and $|S_{31}|$ less than 3.2 dB, with both $|S_{22}|$ and $|S_{32}|$ measured as better than 12 dB for the whole UWB band. Measurement results agree closely with HFSS simulation results. The power divider has a compact size of $4\times9\times0.6mm^3$.

• 한국사회복지학회:학술대회논문집
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• 2004.04a
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• pp.535-559
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• 2004

While the endeavor to introduce the service activity in the college education is enlarged, the object of this study is to introduce the concept of service learning in social work education. The 'content centered service-learning' is focusing on the practical education, the liaison and participation in community and the promotion of civil awareness which are very important in social work education that focuses on the interest and participation in the human and social problem as practical study. This study contemplates the educational effect of the course of social work combined with service learning. This study verifies the self-efficacy, the altruism, the change of social responsibility of students and the effect by carrying out the course of social welfare and service activities side by side. To evaluate the effect of service learning, pre and post test and qualitative analysis in journal of service activity, the discussion during the class and the mid and final term evaluation were done. Through the service learning, students showed the promotion in self-esteem, the altruism, the social responsibility, the self insights as a social worker and were able to have the chance to consider their future job. From the view point of local centers, it was evaluated that the service activity of students was helpful to the institutions and the clients, and that the liaison between the community agency and the college and the experience of integration of service learning and the course of social welfare was helpful too. Based on the above mentioned results, this study provide some recommendations in implementation of service-learning as the teaching methodology of social work.

• Journal of Korean Society for Atmospheric Environment
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• v.18 no.E3
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• pp.129-142
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• 2002

This paper provides a long-term perspective for ozone concentrations at 20 national air quality monitoring sites in Seoul from 1989 to 1998, which were managed by the Korean Ministry of Environment. Ozone episodes occurred more frequently in the east areas (Bangi, Guui, Seongsu, and Ssangmun) than in the west area (Guro and Oryu). When an ozone episode happened, hourly ozone concentrations over 80 ppb continued for an average of 4.0 hours at all sites. Annual variations in daily mean and maximum oBone concentrations showed broadly consistent upward trends at Ssangmun and Gwanaksan. Monthly mean ozone concentrations were the highest from May to June and the 99$^{th}$ and 95$^{th}$ percentile levels appeared higher during June, July, and August. The diurnal patterns of hourly mean ozone levels in urban areas showed typical photochemical formation and destruction, while the flat diurnal shape before 1996 at Gwanaksan indicated few significant photochemical reactions due to a lack of precursors of ozone. The occurrence of ozone over 80 ppb was ascribed to meteorological conditions such as high temperature, strong solar radiation, low relative humidity, and low wind speed with winds most frequently in a westerly direction.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.21 no.7
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• pp.394-401
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• 2009

A manipulator is operated for the motion of mechanical hands or arms. When a cup including liquid inside is shifted by a manipulator, it is important to know how a free surface of the liquid moves. In this study, non dimensional parameters have been found that affect the rise of the free surface in a cup moving with constant acceleration. The non-dimensional parameters are the dimensionless time, the ratio of inertia effect to viscous effect (the Reynolds number), the aspect ratio of the liquid inside the cup and the acceleration ratio (the Froude number). Through this study, the height of the free surface rise in a cup has been predicted and the detailed velocities in the liquid have been examined. Generally, the maximum rise of the free surface is dependent on the Reynolds number and Froude number strongly, but on the aspect ratio weakly. However, the influence of the aspect ratio on the maximum rise of the free surface is not negligible in the range of 10 < Re < 100.

• Elastomers and Composites
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• v.41 no.4
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• pp.238-244
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• 2006

Functionalization of montmorillonite clay has been done using 3-aminopropyltriethoxy silane using water as a dispersing medium. Qualitative evidence of the presence or silane attached to the clay surface has been identified using Fourier transform infrared spectroscopy (FT-IR). Increase in silane concentration decreases the adsorbed/intercalated ratio calculated using differential thermogravimetric analysis (DTG). Average d-spacing calculated using X-ray diffraction initially increases with silane concentration and decreases slightly at higher silane concentration. The influence of processing temperature on the silane functionalization of clay has also been investigated and it shows that chemical grafting of silane on the clay surface is observed with increasing processing temperature.

• Proceedings of the Korean Society for Information Management Conference
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• 2003.08a
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• pp.389-395
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• 2003

현재, 다수의 조직에서 개별적으로 메타데이터 표준을 제시하고 구축하고 있다. 이로 인해 메타데이터 상호간 호환성의 문제가 발생하게 되고 각기 분산되어 구축된 메타데이터 이용 또한 원활하지 않게 되고 있다. 이를 해결하기 위해 본고에서는 메타데이터 레지스트리를 적용하여 국내 문헌정보 DB의 메타데이터 표준 유지와 통합 검색을 통한 연계 활용 모형을 구축하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.377-378
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• 2006

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.437-439
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• 2001

The plan of intercomparison test for high-current system was discussed concretely in the technical committee of STL in 2000. This paper describes the present state of the world, the plan & procedure of intercomparison test and test expenses for high-current system. In conclusion, this mentioned the matters that our country should prepare urgently.