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Analysis of E2E Latency for Data Setup in 5G Network (5G 망에서 Data Call Setup E2E Latency 분석)

  • Lee, Hong-Woo;Lee, Seok-Pil
    • Journal of Internet Computing and Services
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    • v.20 no.5
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    • pp.113-119
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    • 2019
  • The key features of 5G mobile communications recently commercialized can be represented by High Data Rate, Connection Density and Low Latency, of which the features most distinct from the existing 4G will be low Latency, which will be the foundation for various new service offerings. AR and self-driving technologies are being considered as services that utilize these features, and 5G Network Latency is also being discussed in related standards. However, it is true that the discussion of E2E Latency from a service perspective is much lacking. The final goal to achieve low Latency at 5G is to achieve 1ms of air interface based on RTD, which can be done through Ultra-reliable Low Latency Communications (URLLC) through Rel-16 in early 20 years, and further network parity through Mobile Edge Computing (MEC) is also being studied. In addition to 5G network-related factors, the overall 5G E2E Latency also includes link/equipment Latency on the path between the 5G network and the IDC server for service delivery, and the Processing Latency for service processing within the mobile app and server. Meanwhile, it is also necessary to study detailed service requirements by separating Latency for initial setup of service and Latency for continuous service. In this paper, the following three factors were reviewed for initial setup of service. First, the experiment and analysis presented the impact on Latency on the Latency in the case of 1 Data Lake Setup, 2 CRDX On/Off for efficient power, and finally 3H/O on Latency. Through this, we expect Low Latency to contribute to the service requirements and planning associated with Latency in the initial setup of the required services.

CLASSIFICATION OF THE EQUIVARIANT LINE BUNDLES OVER $S^1$ (원 위에서의 EQUIVARIANT LINE BUNDLE 의 분류)

  • Kim, Seong-Suk
    • The Journal of Natural Sciences
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    • v.5 no.1
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    • pp.1-3
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    • 1992
  • G가 compact Lie 군이고 $\pi$ : $E to S^1$$S^1$ 상의 G-line bundle 일때, 군 작용이 없다면, 부드러운 trivial G-line bundle $E to S^1$ 은 S(V) $\times$ $\delta to S(V)$ 와 동치이고 부드러운 nontrivial G-line bundle $E to S^1$ 은 S(V) $\times$$z_2$ $\delta to S(V)$/$Z_2$=P(V)와 동치 이다.

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Differential Role of Ethanol, Glycerol, 4-Methylpyrazole and Isoniazid on Human CYP2E1 Activity in Intact HepG2 Cells (HepG2 세포에서 Ethanol, Glycerol, 4-Methylpyrazole 및 Isoniazid에 의한 Human CYP2E1 활성변화)

  • 최달웅
    • Toxicological Research
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    • v.19 no.3
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    • pp.235-240
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    • 2003
  • The modification of CYP2E1 activity is of considerable interest because of its role in the metabolic activation of a variety of toxic chemicals. In the present studies, the time-course of changes in human CYP2E1 activities was determined after treatment with ethanol, glycerol, 4-methylpyrazole or isoniazid using intact HepG2 cells transfected by human CYP2E1. Hydroxylation of chlorzoxazone was chosen for the measurement of CYP2E1 activity. CYP2E1 protein levels were increased upon cultivation of cells in the presence of ethanol, glycerol, 4-methylpyrazole or isoniazid for 24 hr. After 24 hr cultivation, ethanol or glycerol increased CYP2E1 activities, whereas 4-methylpyrazole or isoniazid inhibited. This different effect of the chemical inducers on CYP2E1 activi-ties persisted to subsequent 24 hr. Competitive inhibition study suggested that 4-methylpyrazole or isoniazid has stronger binding affinity to CYP2E1 than ethanol or glycerol. These results demonstrate that different binding affinity of the chemical inducers to the active site of CYP2E1 plays important role in determining real CYP2E1 activity in intact cells after treatment with the chemical inducers. Present study would be helpful in precise understanding of human CYP2E1-mediated toxicity.

REMARKS ON NONSPECIAL LINE BUNDLES ON GENERAL κ-GONAL CURVES

  • CHOI, YOUNGOOK;KIM, SEONJA
    • Journal of the Korean Mathematical Society
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    • v.52 no.5
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    • pp.991-1001
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    • 2015
  • In this work we obtain conditions for nonspecial line bundles on general ${\kappa}$-gonal curves failing to be normally generated. Let L be a nonspecial very ample line bundle on a general ${\kappa}$-gonal curve X with ${\kappa}{\geq}4$ and $deg\mathcal{L}{\geq}{\frac{3}{2}}g+{\frac{g-2}{{\kappa}}}+1$. If L fails to be normally generated, then L is isomorphic to $\mathcal{K}_X-(ng^1_{\kappa}+B)+R$ for some $n{\geq}1$, B and R satisfying (1) $h^0(R)=h^0(B)=1$, (2) $n+3{\leq}degR{\leq}2n+2$, (3) $deg(R{\cap}F){\leq}1$ for any $F{\in}g^1_k $. Its converse also holds under some additional restrictions. As a corollary, a very ample line bundle $\mathcal{L}{\simeq}\mathcal{K}_X-g^0_d+{\xi}^0_e$ is normally generated if $g^0_d{\in}X^{(d)}$ and ${\xi}^0_e{\in}X^{(e)}$ satisfy $d{\leq}{\frac{g}{2}}-{\frac{g-2}{\kappa}}-3$, supp$(g^0_d{\cap}{\xi}^0_e)={\phi}$ and deg$(g^0_d{\cap}F){\leq}{\kappa}-2$ for any $F{\in}g^1_k$.

RANDOMLY ORTHOGONAL FACTORIZATIONS OF (0,mf - (m - 1)r)-GRAPHS

  • Zhou, Sizhong;Zong, Minggang
    • Journal of the Korean Mathematical Society
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    • v.45 no.6
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    • pp.1613-1622
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    • 2008
  • Let G be a graph with vertex set V(G) and edge set E(G), and let g, f be two nonnegative integer-valued functions defined on V(G) such that $g(x)\;{\leq}\;f(x)$ for every vertex x of V(G). We use $d_G(x)$ to denote the degree of a vertex x of G. A (g, f)-factor of G is a spanning subgraph F of G such that $g(x)\;{\leq}\;d_F(x)\;{\leq}\;f(x)$ for every vertex x of V(F). In particular, G is called a (g, f)-graph if G itself is a (g, f)-factor. A (g, f)-factorization of G is a partition of E(G) into edge-disjoint (g, f)-factors. Let F = {$F_1$, $F_2$, ..., $F_m$} be a factorization of G and H be a subgraph of G with mr edges. If $F_i$, $1\;{\leq}\;i\;{\leq}\;m$, has exactly r edges in common with H, we say that F is r-orthogonal to H. If for any partition {$A_1$, $A_2$, ..., $A_m$} of E(H) with $|A_i|=r$ there is a (g, f)-factorization F = {$F_1$, $F_2$, ..., $F_m$} of G such that $A_i\;{\subseteq}E(F_i)$, $1\;{\leq}\;i\;{\leq}\;m$, then we say that G has (g, f)-factorizations randomly r-orthogonal to H. In this paper it is proved that every (0, mf - (m - 1)r)-graph has (0, f)-factorizations randomly r-orthogonal to any given subgraph with mr edges if $f(x)\;{\geq}\;3r\;-\;1$ for any $x\;{\in}\;V(G)$.

Effect of administration with fat-free diet and dietary iron on polyunsaturated fatty acid, vitamin E and their derivatives in male rats (Rat에 있어서 탈지사료 및 철분투여가 다불포화 지방산, vitamin E 및 그 유도체에 미치는 영향)

  • Huh, Rhin-sou;Kim, Young-hong;Kim, Sung-hoon;Do, Jae-cheul;Lee, Young-ho;Choi, Yeon-shik
    • Korean Journal of Veterinary Research
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    • v.30 no.4
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    • pp.407-412
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    • 1990
  • This study was designed to elucidate the effects of administration with dietary iron and fat-free diet on the contents of unsaturated fatty acid in phospholipid molecules, vitamin E contents and malondialdehyde contents in liver, kidney, muscle and testis of the male rats. The rats were divided into 3 experimental groups, namely, control, iron injection and fat-free diet administration groups. The control group was fed with normal diet, iron injection group injected intraperitoneally 20mg of ferric hydroxide/100g of body weight 20 times every 3 days and fat-free diet group administered lipid extraction diet with hexane in normal diet. All experimental groups were maintained for 60 days with feeding on the respective ration. The results obtained were summarized as follows: 1. In the mean contents of unsaturated fatty acid in phospholipid of liver, kidney, muscle and testis among groups, control group was 21.31mg/g, 19.38mg/g, 1.67mg/g, 13.68mg/g, iron injection group was 13.83mg/g, 16.53mg/g, 0.71mg/g, 10.11mg/g and fat-free diet group was 21.07mg/g, 19.38mg/g, 1.49mg/g and 13.40mg/g, respectively. 2. In the mean contents of vitamin E in liver, kidney, muscle and testis among groups, control group was 6.77mg/g, 1.93mg/g, 0.12mg/g, 0.17mg/g, iron injection group was 3.16mg/g, 0.86mg/g, 0.07mg/g, 0.09mg/g and fat-free diet group was 7.41mg/g, 1.50mg/g, 0.11mg/g and 0.16mg/g, respectively. 3. In the mean contents of malondialdehyde in liver, kidney, muscle, testis and serum among groups, control group was 11.29nM/0.1g, 23.25nM/0.1g, 42.47nM/0.1g, 7.01nM/0.1g, 4.33nM/ml, iron injection group was 34.98nM/0.1g, 40.55nM/0.1g, 72.21nM/0.1g, 12.26nM/0.1g, 11.27nM/ml and fat-free diet group was 8.07nM/0.1g, 20.63nM/0.1g, 39.92nM/0.1g, 6.95nM/0.1g and 4.27nM/ml, respectively.

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Structural and optical properties of Ni-substituted spinel $LiMn_2O_4$ thin films (니켈 치환된 스피넬 LiMn2O4 박막의 구조적, 광학적 성질)

  • Lee, Jung-Han;Kim, Kwang-Joo
    • Journal of the Korean Vacuum Society
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    • v.15 no.5
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    • pp.527-533
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    • 2006
  • Spinel $LiNi_xMn_{2-x}O_4$ thin films were synthesized up to x = 0.9 by a sol-gel method employing spin-coating. The Ni-substituted films were found to maintain cubic structure at low x but to exhibit tetragonal structure for $x{\geq}0.6$. Such cubic-tetragonal phase transition indicates that $Ni^{3+}(d7)$ ions with low-spin $(t_{2g}^6,e_g^1)$ state occupy the octahedral sites of the compound, thus being subject to the Jahn-Teller distortion. By x-ray photoelectron spectroscopy both $Ni^{2+}$ and $Ni^{3+}$ ions were detected. Optical properties of the $LiNi_xMn_{2-x}O_4$ films were investigated by spectroscopic ellipsometry (SE) in the visible?ultraviolet range. The measured dielectric function spectra by SE mainly consist of broad absorption structures attributed to charge-transfer (CT) transitions, $O^{2-}(2p){\rightarrow}Mn^{4+}(3d)$ for 1.9 $(t_{2g})$ and $2.8{\sim}3.0$ eV $(e_g)$ structures and $O^{2-}(2p){\rightarrow}Mn^{3+}(3d)$ for 2.3 $(t_{2g})$ and $3.4{\sim}3.6$ eV $(e_g)$ structures. Also, sharp absorption structures were observed at about 1.6, 1.7, and 1.9 eV, interpreted as due to d-d crystal-field transitions within the octahedral $Mn^{3+}$ ion. The strengths of these absorption structures are reduced by the Ni substitution. Rapid reduction of the CT transition strength involving the eg states for x = 0.6 is attributed to the reduced wavefunction overlap between the $e_g$ and the $O^{2-}(2p)$ states due to the tetragonal extension of the lattice constant by the Jahn-Teller effect.

Laser Cooling and Pumping of Multilevel Atoms (다준위 원자의 레이저 냉각 및 펌핑)

  • Jang, Soo;Kwon, Taek-Yong;Lee, Ho-Sung;Minogin, V.G.
    • Proceedings of the Optical Society of Korea Conference
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    • 2000.08a
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    • pp.64-66
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    • 2000
  • Theoretical foundations of atom dynamics in laser fields are reviewed in relation with applications to laser spectroscopy, control of atomic motion, atom traps and frequency standards. Quasiclassical kinetic equations are applied to multilevel atomic schemes interacting with counter-propagating laser waves to describe the properties of atomic populations and coherence and the time evolution of atomic distribution function. Basic types of the dipole radiation forces on atoms are discussed for the realistic cases of multilevel dipole interaction schemes such as 3(g)+5(e), 3(g)+3(e), 5(g)+3(e), 5(g)+7(e), 3(g)+3(e)+5(e) and 1(g)+3(g)+3(e)+5(e).

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Immunological Study of the Gami-sopunghwalhyeol-tang ($Ji{\={a}}w{\`{e}}i-sh{\={u}}f{\={e}}nghu{\`{o}}xu{\`{e}}-tang$: GSHT) on Rheumatoid Arthritis in Human Fibroblast-like Synoviocytes (가미소풍활혈탕(加味疎風活血湯)이 류마토이드 관절염에 미치는 실험적 연구)

  • Kim, Tae-Young;Song, Young-Il;Oh, Min-Suck;Yoon, Il-Ji
    • The Journal of Korean Medicine
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    • v.27 no.3 s.67
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    • pp.88-106
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    • 2006
  • Objectives: This study was carried out to find the immune responses of the Gami-sopunghwalhyeol-tang $(Ji{\={a}}w{\`{e}}i-sh{\={u}}f{\={e}}nghu{\'{o}}xu{\`{e}}-tang)$ (hereinafter referred to GSHT) to the human fibroblast-like synoviocytes (hFLSs) isolated from patients with rheumatoid arthritis. Methods: Experiments were performed to measure the cytotoxity against hFCs and the production of pro-inflammatory cytokines in hFLSs and the production of NO, ROS. Results: 1. The gene expression of TNF-a, IL-6, IL-8 in hFLSs was effectively reduced at $100{\mu}g/ml$, whereas IL-1 $\beta$ was effectively reduced at 100 and $10{\mu}g/ml$ of GSHT. 2. The gene expression of ICAM-1, MMP-3 in hFLSs was effectively inhibited at 100 and $10{\mu}g/ml$ of GSHT, whereas TIMP-1 was effectively increased at 100 and $10{\mu}g/ml$ of GSHT. 3. The gene expression of NOS-II in hFLSs was effectively inhibited at $100{\mu}g/ml$ of GSHT. 4. The production of NO and ROS in hFLSs was inhibited at 100 and $10{\mu}g/ml$ of GSHT. 5. The proliferation of hFLSs was significantly inhibited at $100{\mu}g/ml$ of GSHT. Conclusions: Comparison of the results for this study showed that Gami-sopunghwalhyeol-tang ($Ji{\={a}}w{\`{e}}i-sh{\={u}}f{\={e}}nghu{\'{o}}xu{\`{e}}-tang$: GSHT) had immunomodulatory effects of suppressing or enhancing.

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Optimization of Supercritical Fluid Extraction of Tocotrienol from Grape Seed (초임계유체 추출을 이용한 포도씨 tocotrienol 추출조건 최적화)

  • Kim, Kyeong-Mi;Woo, Koan Sik;Hwang, In-Guk;Lee, Youn-Ri;Lee, Jun-Soo;Jeong, Heon-Sang
    • Korean Journal of Food Science and Technology
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    • v.41 no.1
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    • pp.37-41
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    • 2009
  • In this study, supercritical carbon dioxide extraction (SFE) was utilized for the extraction of tocotrienol from grape seeds. The optimal conditions for vitamin E and tocotrienol extraction were determined via response surface methodology (RSM). Central composite design was utilized to assess the effects of oven temperature (30-$50^{\circ}C$, X1), operating pressure (17-25 MPa, X2), and extraction time (1-5 hr, X3) of supercritical fluid extraction. Vitamin E and tocotrienol contents were 8.65 mg/100 g and 7.88 mg/100 g at $40^{\circ}C$, 20MPa and 5 hr, respectively. The predicted extraction condition was validated via actual experimentation. The predicted extraction conditions were $40^{\circ}C$, 3.8 hr, and 20.7MPa. The vitamin E and tocotrienol contents under these conditions were 8.20 mg/100 g and 7.42 mg/100 g, respectively. The vitamin E and tocotrienol contents of solvent extraction with hexane were 8.18 mg/100 g and 7.24 mg/100 g, respectively.