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  • Title/Summary/Keyword: D/N value

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Predictive Value of Baseline Plasma D-dimers for Chemotherapy-induced Thrombocytopenia in Patients with Stage III Colon Cancer: A Pilot Study

  • Tanriverdi, Ozgur
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.1
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    • pp.293-297
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    • 2013
  • Background: : Chemotherapy-induced thrombocytopenia (CIT) is an important cause of morbitity in patients with cancer. Aim: To investigate the effect of the baseline plasma D-dimer level, an important marker for thrombotic activity, on chemotherapy-induced thrombocytopenia in patients with stage III colon cancer. Materials and Methods: A total of 43 (28 men) eligible patients were divided into two groups according to whether they exhibited chemotherapy-induced thrombocytopenia: Group 1 (n=21) and Group 2 (n=22). Comparison was made using demographic, histopathologic, and laboratory variables. Additionally, baseline plasma D-dimer levels underwent receiver operation characteristics curve analysis, and areas under the curve were calculated. Sensitivity, specificity, and positive and negative likelihood rates were then determined. Results: The incidence of chemotherapy-induced thrombocytopenia had a significant correlation with baseline platelet count (r=0.568, P=0.031) and baseline plasma D-dimer levels (r=0.617, P=0.036). When the cut-off point for the latter was set as 498 ng/mL, the area under the curve was 0.89 (95%CI: 0.74-0.93), the sensitivity was 91.4%, the specificity was 89.7%, the positive likelihood rate was 3.64 and the negative likelihood rate was 0.24 for chemotherapy-induced thrombocytopenia diagnosis. Conclusions: The baseline level of plasma D-dimer could help to differentiate high-risk patients for chemotherapy-induced thrombocytopenia.

CHARACTERIZATIONS BASED ON THE INDEPENDENCE OF THE EXPONENTIAL AND PARETO DISTRIBUTIONS BY RECORD VALUES

  • LEE MIN-YOUNG;CHANG SE-KYUNG
    • Journal of applied mathematics & informatics
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    • v.18 no.1_2
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    • pp.497-503
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    • 2005
  • This paper presents characterizations on the independence of the exponential and Pareto distributions by record values. Let ${X_{n},\;n {\ge1}$ be a sequence of independent and identically distributed(i.i.d) random variables with a continuous cumulative distribution function(cdf) F(x) and probability density function(pdf) f(x). LetYn=maxX1,X2,,Xn for n \ge 1. We say Xj is an upper record value of Xn,n1,ifYj>Yj1,j>1. The indices at which the upper record values occur are given by the record times {u(n)}, n \ge 1, where u(n) = minj|j>u(n1),Xj>Xu(n1),n2 and u(l) = 1. Then F(x) = 1exa, x > 0, σ>0 if and only if Xu(n)Xu(n+1)andXu(n+1),n1, are independent. Also F(x) = 1xθ,x>1,θ>0 if and only if Xu(n+1)Xu(n)andXu(n),n1, are independent.

Evaluation of Piezoelectric Properties in Pb(Zr1Ti)O3-PVDF Composites for Thick Film Speaker Application (후막 스피커 응용을 위한 Pb(Zr1Ti)O3-PVDF 복합체의 압전 특성 평가)

  • Son Yong-Ho;Kim Sung-Jin;Kim Young-Min;Jeong Joon-Seok;Ryu Sung-Lim;Kweon Soon-Yong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.19 no.10
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    • pp.966-970
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    • 2006
  • We reported on characteristics of the piezoelectric ceramic-polymer composite for the application of the thick-film speaker. The PVDF-PZT composites were fabricated to incorporate the advantages of both ceramic and polymer with various mixing ratios by 3-roll mill mixer. The composite solutions were coated by the conventional screen-printing method on ITO electrode coated PET (Polyethylene terephthalate) polymer film. After depositing the top-electrode of silver-paste, 4 kV/mm of DC field was applied at 120C for 30 min to poling the composite films. The value of d33 (piezoelectric charge constant) was increased when the PZT weight percent was increased. The maximum value of the d33 was 24 pC/N at 70 wt% PZT. But the g33 (piezoelectric voltage constant) showed the maximum value of 32mVm/N at 65 wt% of PZT powder. The SPL (sound pressure level) of the speaker fabricated with the 65:35 composite film was about 68 dB at 1 kHz.

A Study on the Electrical Properties of xPb(R1/2Ta1/2)O3(1x)Pb(Zr0.52Ti0.48)O3(R=Al,Y) Ceramics (xPb(R1/2Ta1/2)O3(1x)Pb(Zr0.52Ti0.48)O3(R=Al, Y) 세라믹스의 전기적 특성에 관한 연구)

  • Kang, Do-Won;Park, Tae-Gone
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.05c
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    • pp.157-160
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    • 2001
  • We have investigated the Dielectric and Piezoelectric properties of xPb(R1/2Ta1/2)O3(1x)Pb(Zr0.52Ti0.48)O3 (R=Al,Y) solid solutions in which R ions are substituted for Al and Y ions. The maximum value of electromechanical coupling factor kp of 55% and 51% were obtained at the composition of 5mol% PAT and 5mol% PYT. However mechanical quality factor(Qm) had a minimum value of 44 and 69 at the composition of 5mol% PAT and 5mol% PYT. Also, the maximum value of piezoelectctric constant of d33(329[pC/N]) and d33(310[pC/N]) were obtained at the composition of 5mol% PAT and 5mol% PYT.

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Dietary phosphorus deficiency impaired growth, intestinal digestion and absorption function of meat ducks

  • Xu, Huimin;Dai, Shujun;Zhang, Keying;Ding, Xuemei;Bai, Shiping;Wang, Jianping;Peng, Huanwei;Zeng, Qiufeng
    • Asian-Australasian Journal of Animal Sciences
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    • v.32 no.12
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    • pp.1897-1906
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    • 2019
  • Objective: An experiment was conducted to investigate the effects of dietary non-phytate phosphorus (nPP) deficiency on intestinal pH value, digestive enzyme activity, morphology, nutrient utilization, and gene expression of NaPi-IIb in meat ducks from 1 to 21 d of age. Methods: A total of 525 one-d-old Cherry Valley ducklings were fed diets (with 7 pens of 15 ducklings, or 105 total ducklings, on each diet) with five levels of nPP (0.22%, 0.34%, 0.40%, 0.46%, or 0.58%) for 21 d in a completely randomized design. Five experimental diets contained a constant calcium (Ca) content of approximately 0.9%. Body weight (BW), body weight gain (BWG), feed intake (FI), and feed to gain ratio (F:G) were measured at 14 and 21 d of age. Ducks were sampled for duodenum and jejunum digestion and absorption function on 14 and 21 d. Nutrient utilization was assessed using 25- to 27-d-old ducks. Results: The results showed ducks fed 0.22% nPP had lower (p<0.05) growth performance and nutrient utilization and higher (p<0.05) serum Ca content and alkaline phosphatase (ALP) activity. When dietary nPP levels were increased, BW (d 14 and 21), BWG and FI (all intervals), and the serum phosphorus (P) content linearly and quadratically increased (p<0.05); and the jejunal pH value (d 14), duodenal muscle layer thickness (d 14), excreta dry matter, crude protein, energy, Ca and total P utilization linearly increased (p<0.05); however, the serum ALP activity, jejunal Na+K+-ATPase activity, and duodenal NaPi-IIb mRNA level (d 21) linearly decreased (p<0.05). Conclusion: The results indicated that ducks aged from 1 to 21 d fed diets with 0.22% nPP had poor growth performance related to poor intestinal digestion and absorption ability; but when fed diets with 0.40%, 0.46%, and 0.58% nPP, ducks presented a better growth performance, intestinal digestion and absorption function.

The Effect of Particle Shape and Size on the Settling Characteristics in Suspension (서스펜션 중에서 입자의 형태와 크기가 침강특성에 미치는 영향)

  • Lee, Ji-Jong
    • Korean Journal of Materials Research
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    • v.4 no.8
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    • pp.927-933
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    • 1994
  • The effect of particle shape and size on the settling characteristics in monodisperse suspensions of non-spherical particles was investigated. The slope index n values which was obtained from the plot of logarithm of settling rate vs. voidage were increased with the decrease of particle size because different amount of liquid could be adsorbed on irregular particle shape and/or size at same volume concentration. From the experimental results, an equation, ni=n(a+b/dv) where n is value of spherical particles, dv is minimum particle diameter and a, b are constants for characteristic of particles.

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MARKOV-BERNSTEIN TYPE INEQUALITIIES FOR POLYNOMIALS

  • Kwon, K.H.;Lee, D.W.
    • Bulletin of the Korean Mathematical Society
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    • v.36 no.1
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    • pp.63-78
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    • 1999
  • Let μ(x) be an increasing function on the real line with finite moments of all oeders. We show that for any linear operator T on the space of polynomials and any interger n 0, there is a constant γn(T)0, independent of p(x), such that Tp∥≤γn(T)P, for any polynomial p(x) of degree n, where We find a formular for the best possible value Γn(T)ofγn(T) and estimations for Γn(T). We also give several illustrating examples when T is a differentiation or a difference operator and dμ(x) is an orthogonalizing measure for classical or discrete orthogonal polynomials.

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A study on new soil investigation method using seismic waves generated by dynamic penetration blows

  • Saito Hideki
    • 한국지구물리탐사학회:학술대회논문집
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    • 2005.09a
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    • pp.3-9
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    • 2005
  • In order to obtain more reliable data for the information on the ground, a new site Investigation method is proposed, in which seismic waves (S-waves) generated by the Swedish Ram Sounding Test (SRS) are used. It is indicated that the energy transferred from the hammer to the rod in SRS's is much more stable, compared to SPT's. A series of SRS with measurements of seismic waves at the ground surface were carried out to clarify the characteristics of seismic wave propagation in the ground. As the results of comparison between seismic S-wave amplitudes and Nd (blow count for 20 cm penetration in SRS), it was found that amplitudes of S-waves generated by SRS correlate well with Nd. The amplitude of the S-wave is thought to be more adequate parameter for the soil strength and rigidity than Nd.

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A NEW PROOF ABOUT THE DECIMATIONS WITH NIHO TYPE FIVE-VALUED CROSS-CORRELATION FUNCTIONS

  • Kim, Han-Doo;Cho, Sung-Jin
    • Journal of applied mathematics & informatics
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    • v.30 no.5_6
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    • pp.903-911
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    • 2012
  • Let {u(t)} and {u(dt)} be two maximal length sequences of period 2n1. The cross-correlation is defined by $C_d({\tau})=\sum{_{t=0}^{2^n-2}}(-1)^{u(t+{\tau})+v(t)$ for τ=0,1,,2n2. In this paper, we propose a new proof for finding the values and the number of occurrences of each value of Cd(τ) when d=2k2(2k+3), where n=2k, k is a positive integer.

Comparison of fracture strength, surface hardness, and color stain of conventionally fabricated, 3D printed, and CAD-CAM milled interim prosthodontic materials after thermocycling

  • Mesut Yildirim;Filiz Aykent;Mahmut Sertac Ozdogan
    • The Journal of Advanced Prosthodontics
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    • v.16 no.2
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    • pp.115-125
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    • 2024
  • PURPOSE. The purpose of this in vitro study was to investigate the fracture resistance, surface hardness, and color stain of 3D printed, CAD-CAM milled, and conventional interim materials. MATERIALS AND METHODS. A total of 80 specimens were fabricated from auto polymerizing polymethyl methacrylate (PMMA), bis-acryl composite resin, CAD-CAM polymethyl methacrylate resin (milled), and 3D printed composite resin (printed) (n = 20). Forty of them were crown-shaped, on which fracture strength test was performed (n = 10). The others were disc-shaped specimens (10 mm × 2 mm) and divided into two groups for surface hardness and color stainability tests before and after thermal cycling in coffee solution (n = 10). Color parameters were measured with a spectrophotometer before and after each storage period, and color differences (CIEDE2000 [DE00]) were calculated. The distribution of variables was measured with the Kolmogorov Smirnov test, and one-way analysis of variance (ANOVA), Tukey HSD, Kruskal-Wallis, Mann-Whitney U tests were used in the analysis of quantitative independent data. Paired sample t-test was used in the analysis of dependent quantitative data (P < .05). RESULTS. The highest crown fracture resistance values were determined for the 3D printed composite resin (P < .05), and the lowest were observed in the bis-acryl composite resin (P < .05). Before and after thermal cycling, increase in mean hardness values were observed only in 3D printed composite resin (P < .05) and the highest ΔE00 value were observed in PMMA resin for all materials (P < .05). CONCLUSION. 3D printing and CAD-CAM milled interim materials showed better fracture strength. After the coffee thermal cycle, the highest surface hardness value was again found in 3D printing and CAD-CAM milled interim samples and the color change of the bis-acryl resin-based samples and the additive production technique was higher than the PMMA resin and CAD-CAM milled resin samples.