• Title, Summary, Keyword: normal structure

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RESEARCH ON NORMAL STRUCTURE IN A BANACH SPACE VIA SOME PARAMETERS IN ITS DUAL SPACE

  • Gao, Ji
    • Communications of the Korean Mathematical Society
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    • v.34 no.2
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    • pp.465-475
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    • 2019
  • Let X be a Banach space and $X^*$ be its dual. In this paper, we give relationships among some parameters in $X^*$: ${\varepsilon}$-nonsquareness parameter, $J({\varepsilon},X^*)$; ${\varepsilon}$-boundary parameter, $Q({\varepsilon},X^*)$; the modulus of smoothness, ${\rho}_{X^*}({\varepsilon})$; and ${\varepsilon}$-Pythagorean parameter, $E({\varepsilon},X^*)$, and weak orthogonality parameter, ${\omega}(X)$ in X that imply uniform norm structure in X. Some existing results are extended or approved.

Oscillator Strength of Normal-incidence Intersubband Absorption in Conduction Bands of Si and Ge Quantum Wells Using Polarization

  • Lee, Chanho
    • Journal of Electrical Engineering and information Science
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    • v.3 no.1
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    • pp.80-85
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    • 1998
  • A theoretical calculation and an optical measurement method of normal-incidence absorption are proposed. By using a waveguide structure, optical interference and the problem of low level signal can be avoided in the measurement of normal-incidence absorption. The oscillator strength of intersubband absorption for a waveguide structure is calculated in Si(001), Si(110), and Ge(001) quantum wells. The polarization angle dependence of the measured and the calculated absorption strength can be obtained with the same waveguide structure, and be compared after normalization. The normal-incidence absorption in Si(110) and Ge(001) quantum wells is shown theoretically, and can be observed in the optical measurement using waveguide structures at the polarization angle of 90$^{\circ}$.

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A CEPHALOMETRIC AND COMPUTERIZED STUDY ON THE CRANIOFACIAL PATTERN IN ADULT WITH NORMAL OCCLUSION (두부방사선계측사진(頭部放射線計測寫眞)과 컴퓨터그래프상(像)을 이용(利用)한 성인정상교합자(成人正常咬合者)의 두개안면형태(頭蓋顔面形態)에 관(關)한 연구(硏究))

  • Kim, Kwang-Won;Lee, Dong-Joo
    • The korean journal of orthodontics
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    • v.20 no.1
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    • pp.87-100
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    • 1990
  • This study was designed to compare the craniofacial structure of orthodontic patients with that of normal adult. For that purpose, 61 male and 64 female adults with normal occlusion were selected and utilizing the cephalogram that had taken under the natural head position and computerized graphic image, the special position of each anatomical structure against true horizontal and vertical reference plane was investigated. The following results were obtained. 1. The absolute special positions of each anatomic structure were calculated. 2. The inclination of Sella-Nasion plane to true horizontal plane was $8.3^{\circ}{\pm}3.9$ in male and $9.3^{\circ}{\pm}3.2^{\circ}$ in female. 3. The inclination of Frankfort horizontal plane to true horizontal plane was $1.3^{\circ}{\pm}3.0^{\circ}$ in male and $1.7^{\circ}{\pm}3.0^{\circ}$ in female. 4. The dimensions of Nasion-sella and Nasion-Anterior nasal spine to be used as the basic units of mesh diagram were $70.7mm{\pm}3.1mm$, $61.8mm{\pm}2.7mm$ in male and $67.8mm{\pm}3.3mm$, $57.0mm{\pm}2.6mm$ in female respectively. 5. The standard templates of craniofacial structure of male and female adult normal group were constructed. 6. The mesh diagrams of craniofacial structure of male and female adult normal group were constructed.

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Biomineralization Strategy of Biocomposites on Regenerated Shell: Chitin Synthesis and Regenerated Shell Formtation by Deformed Oyster Shell (생체복합체의 재생패각 합성전략: 참굴 패각의 변형에 따른 키틴 합성 및 패각재생)

  • Lee, Seungwoo;Park, Seungbin;Yeong, Donghee;Choi, Cheongsong
    • Korean Chemical Engineering Research
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    • v.46 no.3
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    • pp.529-534
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    • 2008
  • The normal shell and the regenerated oyster shell, Crassostrea gigas, are separated according to the characteristics of inner shell morphology. To study characteristics of chitin obtained from the regenerated shell, chitin prepared by acid and alkali process is analyzed by FT-IR (Fourier transform infrared spectrometer) and XRD (X-ray Diffractometer). The content of insoluble protein in the normal shell was more than doubled as compared with that in the regenerated shell. A comparison of secondary structure of the normal shell and the regenerated shell revealed that the content of random of the regenerated shell was above 47%, indicating an amount in the structural unordered state. Through amino acid composition analysis and secondary protein structure of soluble protein isolated from the normal shell and the regenerated shell, it was found that there are differences in biomineralization strategy of the regenerated shell as compared to the normal shell. The relatively low hardness of the regenerated shell is caused by the change of amino acid composition and ordered secondary protein structure as compared to hardness of the normal shell.

GaAs Thin Films Grown on Conducting Glass by Hot Wall Epitaxy for Solar Cell

  • Tu, Jielei;Chen, Tingjin;Zhang, Chenjing;Shi, Zhaoshun;Wu, Changshu
    • Journal of Korean Vacuum Science & Technology
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    • v.6 no.2
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    • pp.71-75
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    • 2002
  • GaAs polycrystalline thin films with good performance were prepared on conducting glass by hot wall epitaxy (HWE), which were used for solar cell. Electron probe micro-analyzer (EPMA) was applied for the composition, morphology of surface and cross-section of grown films, and X-ray diffraction (XRD) for their phase structure; Raman scattering spectum (RSS) and photoluminescence (PL) were used for evaluating their optical characteristics. The results show that, there is textured structure on the surface of grown GaAs polycrystalline films, which is greatly promised to be suitable for the candidate of solar cell with low cost and high efficiency. It is concluded that the source and substrate at temperature of 900 ~ 930 $\^{C}$ and 500 $\^{C}$ respectively would be beneficial for such films.

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NOTE ON NORMAL EMBEDDING

  • Yi, Seung-Hun
    • Bulletin of the Korean Mathematical Society
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    • v.39 no.2
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    • pp.289-297
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    • 2002
  • It was shown by L. Polterovich ([3]) that if L is a totally real submanifold of a symplectic manifold $(M,\omega)$ and L is parallelizable then L is normal. So we try to find an answer to the question of whether there is a compatible almost complex structure J on the symplectic vector bundle $TM$\mid$_{L}$ such that $TL{\cap}JTL=0$ assuming L is normal and parallelizable. Although we could not reach an answer, we observed that the claim holds at the vector space level. And related to the question, we showed that for a symplectic vector bundle $(M,\omega)$ of rank 2n and $E=E_1{\bigoplus}E_2$, where $E=E_1,E_2$are Lagrangian subbundles of E, there is an almost complex structure J on E compatible with ${\omega}$ and $JE_1=E_2$. And finally we provide a necessary and sufficient condition for a given embedding into a symplectic manifold to be normal.

The Main Problems of Internal Professional Structure of Mathematics Teachers in Middle Schools

  • Li Miao;Yu Ping
    • Research in Mathematical Education
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    • v.9 no.2
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    • pp.97-113
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    • 2005
  • Investigating mathematics teachers in middle schools by questionnaire and interview, we find some problems of internal professional structure of mathematics teachers in middle schools. These are reflected in five aspects: professional theory, professional knowledge, professional ability, professional morality, reflection and innovative consciousness.

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Relationship Between the Structure and the Superconductivity in LaFeAsO

  • Jung, Dongwoon;Cho, Sungwoo;Lee, In-Ja
    • Bulletin of the Korean Chemical Society
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    • v.34 no.3
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    • pp.912-916
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    • 2013
  • The electronic structure of LaFeAsO was analyzed by tight-binding band calculation based upon the normal and shrunk lattices. A strong Fermi surface nesting was found in the normal LaFeAsO, while most of the nesting area was disappeared in the shrunk LaFeAsO. It was found, therefore, high pressure atmosphere is required to become a superconductor for LaFeAsO by suppressing the SDW (spin density wave) state through the disappearance of the Fermi surface nesting.

The Change in Exercise Capacity, Cardiac Structure and Function in Pre-Metabolic Syndrome Adults

  • Shin, Kyung-A;Kim, Young-Joo;Park, Sae-Jong;Oh, Jae-Keun
    • Biomedical Science Letters
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    • v.17 no.4
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    • pp.321-328
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    • 2011
  • This study divided a group of healthy adults aged 20 or older who had a health examination at J General Hospital in Gyeonggi Province into three groups according to the degrees of metabolic syndrome risk factors. They include the normal group (n=58), the pre-metabolic syndrome group (n=112) and the metabolic syndrome group (n=32). They were compared in exercise capacity and cardiac structure and function and impacts of exercise capacity on the cardiac diastolic function. All the groups took echocardiography to have their cardiac structures and functions examined and an exercise stress test to have their exercise capacity measured. The research findings were as follows: There were differences in exercise capacity, cardiac structure, and diastolic heart function among three groups. Between exercise capacity and diastolic heart function was found to be related. It turned out exercise capacity affected the cardiac diastolic functions. In conclusion, there were significant differences in exercise capacity between the normal group and the metabolic syndrome group and in the cardiac structure and function among the normal, metabolic syndrome, and pre-metabolic syndrome group. In addition, METs (metabolic equivalents) and heart rate recovery of exercise capacity turned out to affect cardiac diastolic functions.