• 산업공학
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• 제14권3호
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• pp.296-301
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• 2001

The focus of this study is to redesign the Korean license plate by comparing the USA's plate with European plate formed by 1-line system in order to increase a read rate of Korea license plate. And we have compared the read rate of the new design license plate with that of the present license plate and that of the license plate studied so far. As an experimental method (used in a precedent research), we use three kinds of methods that are the measurement of the read-distance, the measurement reading-rate under the short-term exposure and the measurement of the reading-rate when driving. First, three kinds of measurements for plates of five nations are performed. Then we redesign the new Korean license plate under the base of read rates obtained by five nation's plate. As alternatives, we choose five license plates. Those alternatives are the redesigned license plate, the present license plate, the license plate studied so far, and two types of eternity license plates made by the Korea Transport Institute. When we compare results of the read-distance, there is no significant in term of different the read-distance between the alternatives. But there is a significant difference in term of the misreading-rate and the read-rate when diving. Therefore, it is necessary to redesign the present license plates because of a high misreading-rate.

• 대한간호학회지
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• 제35권2호
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• pp.390-398
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• 2005

Purpose: This study was aimed at providing basic data for developing a nursing intervention program which enables systematic and correct visual acuity care by discovering out visual acuity conditions, prevalence rate of myopia, and the factors related to myopia with Preschool children. Method: The subjects of this study consisted of 519 children between 3 and 6 years of age from 12 kindergartens in Seoul which were selected through multiple cluster sampling. Myopia was defined as the spherical equivalent (SE) of more than -0.5 diopters (D) in the right eye. The data was analyzed by t-test, 2-test, ANOVA, and logistic regression by using the SAS program. Result: The prevalence rate of myopia was $8.7\%$. the odds ratio of child myopia when one parent had myopia was 2.2 times higher than when neither parent had myopia. The odds ratio of child myopia when reading more than three books per week was 0.27 times higher than reading less than three books. Conclusion: Myopia should be continuously and intensively managed from the age of 3.

• 음성과학
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• 제13권4호
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• pp.107-126
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• 2006

The aim of this study is to analyze the tonal structures of Korean conjunctive phrases produced by Daegu dialect speakers and show that there are distinctive intonational patterns between dialogic and reading styles. In the experiment, we examined the pitch contour at the edge of conjunctive phrases including '-ko', $'-(i)my{\partial}n'$, $'-(a){\partial}s{\partial}'$, '-(nin)de', '-do' in the base which is made a coordinate and subordinate conjunctive sentence according to the relation of pre-phrase and post-phrase. The results of this study show that '-ko' has L%, $'-(i)my{\partial}n'$ has LH%, $'-(a){\partial}s{\partial}'$ has HL% and '-(nin)de' has LH%, '-do' has LH% in Daegu Dialect. And the results show the conjunctive sentences were about 20% longer when they produced in a dialogic style than in a reading style. The dialogic style has various durations, the duration of the reading style is slower than the dialogic style by a rate of 20%. This suggests that the dialogic style is more dynamic than the reading style, which may be due to the communicative interaction between speakers and listeners.

• 한국식물학회:학술대회논문집
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• 한국식물학회 1999년도 춘계학술발표대회:발표논문요지록
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• pp.18-18
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• 1999

We characterized a cDNA clone for a low molecular weight heat-shock protein (LMW HSP) from tobacco named TLHS-l. Nucleotide sequence determination of TLHS-1 identified an open reading frame for 159 amino acids. To the upstream of the open reading frame, a sequence of 124 nucleotides was determined. To the 3' downstream of the open reading frame, 212 nucleotides were identified which carried poly(A)-tail. Comparison of the open reading frame and hydropathy plot of TLHS-1 with the previously reported class I LMW HSPs showed high identity which classified TLHS-1 as a class I LMW HSP cDNA clone. We proposed that there are six consensus regions in class I LMW HSPs. RNA blot hybridization for TLHS-1 showed a typical expression pattern of heat-shock-inducible gene from three common tobacco cultivars. The open reading frame of TLHS-1 was overexpressed in Escherichia coli. TLHS-1 protein confers thermal protection of other proteins in vitro and in vivo. Thermal induced aggregation of citrate synthase was reduced by purified TLHS-1 protein, and thermal death rate at $50^{\circ}C$ was reduced in E. coli expressing TLHS-l. From these data, we can expect that TLHS-1 acts as a molecular chaperone.perone.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.317-319
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• 2009

신체불수 장애인들은 다양한 종류의 보조 장치를 사용하고 있고 독서 보조 장치도 여러 종류 연구되고 개발되어 있다. 하지만 현재 개발되어 시판되고 있는 신체적 장애인을 위한 독서 보조 장치는 기능이 단순히 책장을 넘겨주는데 국한되어 있다. 본 논문에서는 신체적 장애인의 독서를 보조할 수 있는 장치의 프로토타입 모델을 Lego Mindstorm NXT를 이용하여 구현한 하드웨어의 책장 넘김 성공률 향상을 위해 설계를 수정하고 PDA와 같은 모바일 기기를 연동하여 보다 편리하고 유용한 기능 및 서비스를 구현한다. 그리고 장애인만을 위한 독서 보조 장치가 아니라 일반인들도 유용하게 사용할 수 있는 유니버셜 디자인 관점의 도구가 될 수 있는지 모색해본다.

• 한국융합학회논문지
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• 제9권3호
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• pp.249-256
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• 2018

연구의 목적은 외국어 읽기의 유창성과 정확성의 언어습득적 의의를 고찰하고, 효율적인 영어 학습 패러다임을 연구하는데 있다. 언어습득 측면에서, 제 2언어학습의 정확성과 유창성사이에서 무엇을 우선 가르치느냐의 문제는 중요한 이슈가 되어왔다. 제 1언어와 제 2언어의 교실상황에서, 많은 언어연구가들의 관심 때문에, 유창성은 중요한 요소로 대두되고 있다. 정확성과 유창성은 둘 다 중요하지만, 외국어의 경우, 유창성 중심의 학습에서 정확성 중심의 학습으로 점진적인 학습 패러다임의 전환이 있어야 한다. 이런 관점에서, 본 연구는 외국어의 유창성 개발을 위한 대안으로 자발적다독법을 제시하고 있다. 빠르고 정확한 단어 인지 기술과 읽기 유창성이 없으면, 좋은 읽기 능력을 가질 수 없다. 그러므로 유창성 개발을 위한 방법들이 개발되어야 하며, 이것에 대한 해법으로, 자발적다독법이 외국어 교육상황에서 읽기유창성을 위한 효과적인 연구방법론임을 입증하고 있다.

• 한국인터넷방송통신학회논문지
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• 제11권1호
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• pp.29-34
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• 2011

본 논문에서는 자동 원격검침을 위한 전력선 통신에서의 등화기 기법인 zero-forcing (ZF)와 minimum mean square error (MMSE) 기법을 제안하고 분석하였다. 전력선 통신을 이용한 효율적인 AMR 시스템 구현을 위해서 임펄스 노이즈와 다중경로 채널의 영향들은 완화되어야 한다. 이러한 영향들을 극복하기 위해, 앞서 말한 등화기 기법들을 사용하였다. 시스템 성능은 비트오류율 (BER)에 의해서 평가되어진다. 모의실험 결과로부터 등화기가 전력선 통신 시스템의 BER 성능을 현저하게 향상시키고 MMSE가 ZF보다 더 나은 성능을 제공함을 확인하였다. 본 논문의 실험 결과는 AMR 시스템뿐만 아니라, 다양한 스마트 그리드 서비스에도 적용될 수 있다.

• Advances in materials Research
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• 제13권2호
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• pp.129-140
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• 2024

This study evaluates the ratio of Toluene di-isocyanate (TDI) functional group isocyanate (NCO) to the binder functional hydroxyl group (OH) in HTPB/AP/Al-based propellants on their mechanical properties, flow rate, and viscosity to determine the limitations of NCO/OH in the composition of solid propellants. The propellants consisted of hydroxyl-terminated polybutadiene (HTPB) polyurethane (PU), aluminum (Al) and tri-modal ammonium perchlorate (AP). The tri-modal AP consisted of 30% of coarse AP, 30% of medium AP, and 8% of fine AP. The ratio of NCO/OH varies from 0.73 to 0.85, with two binder percentages of 10.5% and 12%. An increase in NCO/OH ratio with 10.5% binder provided 20%, 95%, and 8 to 9% increments in UTS, modulus, and hardness, respectively. However, the propellant elongation, density, and flow rate decreased by 170%, 0.2%, and 11-12%, respectively. Viscosity increased 20% based on initial hour reading. The 12% binder provides 27%, 47%, and 5~6% an increment of UTS, modulus and hardness respectively. However, the propellant elongation, density, and flow rate decreased by 47%, 0.17% and 27%, respectively. The viscosity increased 30% based on initial hour reading. This study suggests the NCO/OH value of 0.77 and 10.5~11% binder content in propellant based on the mechanical properties, flow rate, and viscosity for better processing and pot life.

• Journal of Acupuncture Research
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• 제19권6호
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• pp.221-233
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• 2002

Background and Purpose : MRI(Magnetic Resonance Imaging) has become one of the most sensitive diagnostic tool no evaluate problems of the knee, because it enables us to identify not only osseous tissue but also soft tissues including muscle, fascia, tendon, ligament, meniscus and fat around the knee joint. Objective : To compare between MRI reading and pain, duration, physical examination in patients with pain of knee joint. Methods : 20 patients with pain of knee joint included in this study. This study researched pain-degree, duration, physical examination with pain of knee joint. Using MRI(Horizon Lx 1.0T-GE), we obtained the results. Results : 1. In the distribution of sex; Female rate was 80.0% and male rate was 20.0%. In the distribution of age, above sixty group was the largest group by each 55.0%. 2. In the distribution of MRI reading; 'Meniscus horm tear' was 70.0%, 'Osteoarthritis' was 55.5%, 'ACL partial tear' was 15.0%, 'Bone bruise at tibia, femur' was 15.0%. 3. Correlation between duration of pain and MRI reading showed that acute and subacute stage related various MRI reading, that chronic stage related 'Osteoarthritis' and 'Meniscus horn tear' by each 69.2%, 92.3%. 4. Correlation between pain and MRI reading showed that severe pain(GVI) related 'ACL partial tear, PCL partial tear' by each 100%, that mild pain(GII) related 'Osteoarthritis, Meniscus horn tear' by each 70.0%, 80.0%. 5. Correlation between physical examination and MRI reading showed that Drawer test related ACL partial tear by each 60.0%, that McMurray test related 'Meniscus horn tear' by each 75.0%. 6. Correlation between effect of treatment and MRI reading showed that 'Osteoarthritis, Meniscus horn tear' related good effect, that ACL partial tear related poor effect. Conclusions : These results suggest that acute and sever pain relate 'ACL partial tear, PCL partial tear', that chronic and mild pain related 'Osteoarthritis, Meniscus horn tear'. So it is responsibility to use MRI as a sensitive diagnostic tool in the knee problems.

• 한국컴퓨터산업학회논문지
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• 제2권6호
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• pp.827-836
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• 2001

데이터는 컴퓨터 시스템에서 파일구조로 나타난다. 그러나 파일의 크기는 매우 커지고, 그것을 제어하고 전송하기에 어려운 점이 있다. 그래서 최근에 데이터 압축에 대한 새로운 알고리즘이 개발되고 있다. 그래서 본 논문에서는 허프만 압축기법의 단점을 보완하여 새로운 동적 압축 기법을 제안하고자 한다. 허프만 압축 기법에는 두 가지 단점이 있다. 첫 번째로 처음 파일내의 문자의 빈도수를 구할 때와 실제로 압축하기 위해서 동작할 때, 파일을 두 번 읽어들인다는 것과, 두 번째로, 트리에 대한 정보를 같이 저장해야되기 때문에, 그 만큼 압축 효율이 떨어진다는 것이다. 이러한 단점은 본 논문에서 제시한 방법은, 동적인 형태로 재배치된 데이터를 한번에 읽어들일 수 있고, 파이프라인 구조로 트리의 정보를 저장할 수 있기 때문에, 새로운 동적 재배치 방법으로 해결할 수 있다.