• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.7
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• pp.1405-1409
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• 2004

This paper is studied new block mode decision algorithm for H.264/AVC. The fast block mode decision algorithm is consist of block range decision algorithm. The block range decision algorithm classifies the block over 8$\times$8 size or below for 16${\times}$16 macroblock to decide the size and type of sub blocks. As the sub blocks of 8$\times$8, 8r4, 4$\times$8 and 4$\times$4, which are the blocks below 8$\times$8 size, include important motion information, the exact sub block decision is required. RDC(RDO cost) is used as the matching parameter for the exact sub block decision. RDC is calculated with motion strength which is the mean value of neighbor pixels of each sub block. The sub block range decision reduces encoding arithmetic amount by 34.62% on the average more than the case not using block range decision. The block mode decision using motion strength shows improvement of PSNR of 0.05[dB].

• Journal of Digital Contents Society
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• v.14 no.2
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• pp.247-254
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• 2013

Storage Class Memory(SCM), such as PRAM, FRAM and MRAM, are expected to be comparable to DRAM in terms of access speed and to Flash memory in terms of capacity in a near future. In this paper, assuming that not only the secondary storage (HDD or Flash memory) but also the primary memory (DRAM) will be replaced by SCM in the future computer systems, we propose an efficient file access framework for the SCM based computer systems. The proposed framework do not assign exclusive area in the SCM to the file system and uses various memory-related techniques, such as unified data access path, zero-copy data read using file mapping, copy-on-write, and multiple page pre-faulting for file management. Based on the preliminary experimental results, we could conclude that the proposed framework can be an efficient baseline for designing a new operating system for the SCM based computer systems.

• Korean Journal of Environment and Ecology
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• v.15 no.1
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• pp.39-56
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• 2001

본 연구는 국토의 친환경적 개발을 위한 제도적 장치 중 하나인 환경성검토의 강화방안을 마련하고자 경기도 남양주시 오남면 팔현리 일대의 골프장개발예정자를 대상으로 한 환경성검토서를 분석하였으며, 또한 대상지의 정확한 평가를 위해 현존식생도, 녹지자연도, 군집의 발달기원, 천이단계, 군집의 희소성, 식물의 희소성 판단의 6개 항목을 선정, 적용한 결과 본 대상지는 개발계획읜 축소. 조정항목으로 판단되었다. 친환경적인 개발을 위한 환경성검토 강화방안을 계획적인 측면에서는 적정대상지의 선정과 이식수목의 산정을 제도적인 측면에서 표토보존 및 이용에 관한 법률과 자연훼손보상제도를 제안하였다. 추가조상대상지역(면적: 1.436, DGN 7이 254, 587$\m^2$. DGN7(8)이 207,235$\m^2$ DGN 5가 163,259$\m^2$, DGN 2는 184,129$\m^2$로 나타나 대상지와 추가조사지역 일부를 포함한 적정대상지를 선정하였다. 이식수종은 성상별로 소나무 1종, 낙엽활엽교목 19종, 낙엽활엽아교목 11종, 낙엽관목 30종, 만경목 11종이었고, 이식가능면적은 639,310$\m^2$이었으나, 보존지역을 제외한 실제 이식가능한 지역은 275, 366$\m^2$으로 나타났다. 대상지의 내 이용가능한 표토량은 137.681㎥이었으며, 보존지역 중 불가피한 훼손면적은 43,938$\m^2$로 나타나 이에 상응하는 가치의 습지나 소생물권 등을 조성하여야 할 것이다.

• Sijohaknonchong
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• v.44
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• pp.237-254
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• 2016

It is by presenting the how to read of Manhoengcheongnyu(만횡청류) in this article. Premise of how to read of Manhoengcheongnyu(만횡청류), the meaning of the lyrics is inconsequential. And yet reading, at the same time, it is a singing of drinking. Such characteristic is one that is found in reading substances and singing thereof. Premise of how to read of Manhoengcheongnyu (만횡청류), to the statement of the encounter and farewell between men and women when considering these points, 'Ijeneunmotbogedo(이제는못보게도~)' is reflected the heart of the speaker is called "do not want to parting". Speaker, want their own appearance has reached the lover through the children. Lover is the speaker can be left laughing would could spend laughing after all.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.42 no.4 s.304
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• pp.133-142
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• 2005

In this paper, two digital video scrambling methods are proposed as simple means of the digital content protection techniques. One is inter block scrambling using motion vector, the other is intra block scrambling using intra prediction mode. The proposed inter block scrambling method distorts the original sequences by swapping horizontal and vertical components of motion vector. This method can be applied on most common video coding techniques such as MPEG-1, 2, 4, H.264, etc. The proposed intra block scrambling method distorts the original sequences by modifying intra prediction mode that is property of H.254 video coding technique. Both methods do not cause my bit rate increase after scrambling. Moreover, they have low complexity because they need only simple operation like XOR. Especially, the proposed intra block scrambling does not distort inter blocks directly. But inter blocks are distorted by error propagation effect as much as intra blocks. This paper introduces two new digital video scrambling method and verifies its effectiveness through simulation.

• Journal of Digital Convergence
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• v.11 no.1
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• pp.249-254
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• 2013

The number of channels are increased into several hundreds of channels when coming out the digital broadcasting era. In this environment, viewers searching for programs will be very difficult to do. In addition, recent popularization of smart devices are receiving the services that they previously had not been given to. A TV program recommended a system that has been studied as a way to solve these problems. However, most studies have been studied in most web-based research results when applied to broadcast TV for TV program recommendations. In particular, the combination of the current members who watch TV are not considered. In this paper, the environment and TV viewers are considering a combination of the members of the TV program's recommended system proposal. In order to make a group deal successful, we employ the face recognition.

• The Journal of the Acoustical Society of Korea
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• v.24 no.5
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• pp.248-254
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• 2005

In this Paper, the structure of a split bandwidth wideband speech coder and its highband coder for tone qualify elevation are Proposed. The lowband and highband by the split bandwidth method are encoded independently applying the G.729E and MLT (Modulated Lapped Transform) residual model. In the highband structure which is encoded by low bit rate of 4kbps, the MLT residual signals are distinguished to voice and unvoice signal . The voice signals are applied to MLT peak picking method by lowband pitch period. Because transformed MLT residual signals are represented by periodic signal that have periodic peak. The unvoice signals are applied to MLT which linear prediction spectral response is added and do vector quantization. Performance for proposed 15.8kbps wideband speech coder was verified through subjective listening test.

• Journal of the Korean Magnetics Society
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• v.8 no.5
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• pp.249-254
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• 1998

In relation to the application of magnetic method to the evaluation of irradiation damage (embrittlement) changes in the magnetic parameters(hysteresis loop and Barkhausen noise) and Vickers microhardness due to neutron irradiation and heat treatment were measured and compared. In the case of irradiation $(2.3{\times}10^{19}\;n/cm^2,\; E{\ge}1\;Mev,\; 288{\circ}C)$ hysteresis loop measurements show that susceptibility decreases as coercivity increase. Saturation magnetization do not show any change. Barkhausen noise amplitude and Barkhausen noise energy have decreased while Vickers microhardness has increased. For isothermally heat treated condition of irradiated specimen at 470 $^{\circ}C$ and 540 $^{\circ}C$, Barkhausen noise energy has increased while Vickers microhardness has decreased. Results of BNE and Vickers microhardness are reversed to the results on irradiated condition. All these consistent changes in magnetic parameter and Vickers microhardness measurement, which are thought to be resulted from the interaction between irradiation-induced defects and dislocation, and magnetic domain, respectively, show a possibility that magnetic measurement may be used to the evaluation of material degradation and recovery due to neutron irradiation and heat treatment, respectively, if a relevant large database in prepared.

• Journal of Astronomy and Space Sciences
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• v.19 no.4
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• pp.243-254
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• 2002

Various uncertainties involved in ionospheric conductivity estimation utilizing the electron density profile obtained from the Sondrestrom incoherent scatter radar are examined. First, we compare the conductivity which is based on raw electron density and the one based on corrected electron density that takes into account the effects of the difference between the electron and ion temperatures and the Debye length. The corrected electron density yields higher Pedersen and Hall conductivities than the raw electron density does. Second, the dependence of collision frequency model on the conductivity estimation is examined. Below 110 km conductivity does not depend significantly on collision frequency models. Above 110 km, however, the collision models affect the conductivity estimation. Third, the influence of the electron and ion temperatures on the conductivity estimation is examined. Electron and ion temperatures carrying an error of about 10% do not seem to affect significantly the conductivity estimation. Fourth, also examined is the effect of the choice of the altitude range of integration in calculating the height-integrated conductivity, conductance. It has been demonstrated that the lower and upper boundaries of the integration are quite sensitive to the estimation of the Hall and Pedersen conductances, respectively.

• The Journal of Korean Society for School & Community Health Education
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• v.20 no.2
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• pp.81-91
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• 2019

Objectives: It helps dental clinic to work 1:1 consulting and select the properties of the Kakao Talk message. The study was designed to determine the influence of users cognitive and emotional responses by message attribute that affect intention of use of dental clinic. Methods: This study targeted 297 peple Kakao Talk users aged 20-50 s, in Seoul, Gyeonggi-do and Incheon from, February 6 to April 7, 2017. We analyzed the data with frequency analysis, t-test, one-way ANOVA, and multiple regression analysis by using SPSS ver 24.0(SPSS Inc, Chicago, USA). The significance level for significance was set at 0.05. Results: Among the user's responses about the event type Kakao talk message, the ease(${\beta}=0.121$, p<0.01), usefulness(${\beta}=0.148$, p<0.001), affinity(${\beta}=0.471$, p<0.001), satisfaction(${\beta}=0.249$, p<0.001). affected intention of use of dental clinic. Among the user's responses about the dental information type, the ease(${\beta}=0.150$, p<0.05), expertise(${\beta}=0.151$, p<0.05), satisfaction(${\beta}=0.237$, p<0.001) affected intention of use of dental clinic(p<0.05). Among the user's responses about the general public relations type, the expertise(${\beta}=0.254$), affinity(${\beta}=0.193$), satisfaction(${\beta}=0.474$) affected intention of use of dental clinic(p<0.001). Conclusion: It is necessary to elicit a positive intention of use of dental clinic through a highly emotional response from the users to improve the image of the dental clinic and to attract patients.