• Journal of Scientific & Technological Knowledge Infrastructure
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• s.8
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• pp.107-112
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• 2002

이 글에서는 많은 연구자들이 찾고자하는 예방 및 치료법의 대상이 되는 질병 중에서 유전질환에 대해서 말하고자 한다. 먼저, 어떤 질병이든지 그 질병에 대한 종합적인 분석이 바탕이 되어야 치료법 및 약이 개발될 수 있다. 유전질환도 마찬가지이다. 유전질환의 발병 및 증상에 대한 자료들이 체계적으로 수집되고 종합적으로 관리되어야 그 예방 및 치료법 개발을 위한 기반이 마련되는 것이다. 특히 유전질환은 지역이나 인종에 따라 그 양상이 다를 수가 있어 한국인의 민족적 유전 특성에 따른 질환 특이성이 고려된 유전질환의 종류와 발생 빈도, 유전자 변이에 대한 연구가 필요하다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2018.10a
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• pp.130-130
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• 2018

• Journal of the Korean Ceramic Society
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• v.42 no.2 s.273
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• pp.81-87
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• 2005

The compositions for LTCC embedded capacitors based on $BaTiO_3$ ceramics with $5\~15\;wt\%$ of lithium-borosilicate glass frits were studied. After the glass frits, which is chemically stable and has acceptable ability of low-temperature sintering, were added to the host dielectric materials, the sintering behavior and dielectric properties were evaluated. As for $BaTiO_3$, relative density of >$95\%$, permittivity 990, and dielectric loss $3.1\%$ were obtained when sintered at $925^{\circ}C$ with 5 wt$\%$ of glass frits. As for $(Ba,Ca)(Ti,Zr)O_3$ ceramics, relative density of >$95\%$, open porosity <$0.5\%$, permittivity 700, and dielectric loss $2\%$ were obtained when sintered at $875^{\circ}C$ with 10 wt$\%$ of glass frits.

• Journal of Animal Science and Technology
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• v.50 no.6
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• pp.733-740
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• 2008

The purpose of this study was to assess the genetic variation and establish the relationship amongst Hanwoo, Angus and Holstein breed. The genetic characteristics and variability within Hanwoo(300), Angus(80) and Holstein(50) were estimated on the basis of relationships determined using the 10 kinds of microsatellite, which is located on different chromosomes. Frequencies of microsatellites markers were used to estimate heterozygosities, polymorphic information content(PIC) and genetic distances. The PICs ranged from 0.604 to 0.872(Hanwoo), from 0.562 to 0.812(Angus) and from 0.471 to 0.828(Holstein). Observed heterozygosity and PIC of Hanwoo are the highest among the analyzed breeds. Additionally, Estimates of genetic distance can be utilized to identify genetic relationships between Hanwoo and the other breed. Genetic distances(0.233) between Hanwoo and Angus was lower than distances between Hanwoo and Holstein(2.283). Also, Genetic distances between Angus and Holstein was shown for(2,400). The other side, each individuals were not ramified to different group and were spread evenly in phylogenetic dendrogram about all the populations.

• Journal of Advanced Navigation Technology
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• v.13 no.6
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• pp.838-845
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• 2009

In order to obtain magneto-dielectrics with various permmittivity and permeability which could be used as the antenna substrate, various magneto-dielectrics compounded of dielectric materials(such as silicon and epoxy resin) and magnetic materials(such as carbonyl iron, barium and strontium powder) were fabricated. The relative permittivity and permeability of those were measured by use of HP 4291B impedance analyzer. Based upon the measured results, inverted-F meander monopole antennas(IFA) which were printed on the magneto-dielectric substrates fabricated as film type were designed and fabricated to investigate into variations of antenna characteristics such as the resonant frequency and impedance bandwidth in comparison with use of dielectric substrate. Some simulated and measured results for the designed IFA were presented. Characteristics of magneto-dielectrics which are different according as the choice of magnetic material or the composition ratio between magnetic material and dielectric material is different have been discussed.

• Composites Research
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• v.14 no.1
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• pp.30-38
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• 2001

As fiber reinforced composite materials are widely used in aircraft, space structures and robot arms, the on-line cure monitoring during the cure process of the composite materials has become an important research area for the better quality and productivity. In this paper, the dielectric circuit of the Wheatstone bridge type for measuring the dissipation factor during cure of thermsetting resin matrix composite materials was designed and manufactured. Also, the dielectric sensor for the cure monitoring of high temperature cure composites was developed and tested. The residual thermal stresses of the dielectric sensor during high temperature cure were analyzed by the finite element method and its dielectric characteristics at high temperature cure were analyzed by the finite element method and its dielectric characteristics at high temperature were evaluated. The on-line cure monitoring of the BMI(Bismaleimide) resin was performed using the developed Wheatstone bridge type circuit and the high-temperature dielectric sensor.

• Journal of the Korean Institute of Telematics and Electronics
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• v.27 no.10
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• pp.10-15
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• 1990

Theory and experimental results of measuring the microwave dielectric characteristics of low-loss materials by using dielectric rod resonator method are presented. The $TE_{011}$ mode resonance frequency was adapted to minimize the effect of the air gap between the rod and the conducting plates. The dielectric properties were computed from the resonance frequency, sample geometry and 3 dB bandwidth. The error of measurements was within ${\pm}3{\%}$ for dielectric constant and was within ${\pm}12{\%}$ for dielectric loss.

• KOGO NEWS
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• v.3 no.1
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• pp.6.2-6.2
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• 2003

• Journal of the Korean Society for Marine Environment & Energy
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• v.15 no.1
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• pp.22-24
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• 2012

Depending on the status of the engine oil, the dielectric constant is changed. Dielectric constant of oil is related to the characteristic impedance of the probe and the characteristic impedance of the probe determines the reflected signal. In this paper, we derive an equivalent circuit of the probe and using the dielectric constant obtained by measuring the capacitance, the theoretical reflection coefficient of the probe was calculated. In the results, if the engine oil is deteriorated, we can see that the reflection coefficient is increased.

• Korean Journal of Materials Research
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• v.5 no.5
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• pp.518-524
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• 1995

BST 박막을 Pt/Si$O_{2}$/Si 기판위에 co-sputtering 방법으로 형성할 때 열처리 조건이 BST 박막의 결정성과 전기적 특성에 미치는 영향에 관하여 연구하였다. BST 박막의 특성은 급속 열처리나 관상로 열처리과 같은 후열처리 온도보다 증착시의 기판온도에 따라서 민감하게 변화하였고, 기판 온도를 55$0^{\circ}C$로 하여 증착할대 Perovskite상이 가장 안정적으로 성장하여 유전율 1100, 유전손실계수 0.02로 우수한 유전특성을 나타내는 막을 형성할 수 있었다. BST 박막은 기판온도를 증가하면 정합에너지와 표면에너지를 최소로하는 (111) 방향으로 우선방위를 나타내었고 결정립의 조대화 현상으로 누설전류가 증가하였다.