A distribution of impact factors of journals in the area of software: An empirical study

Data from two bibliographic databases i.e. COMPENDEX and INSPEC have been collected on the broad subject software and related topics. The titles of the journals were extracted from the database. The impact factors of the titles were also collected in order to study the distribution of impact factors. An attempt has been made to identify a suitable model to describe a distribution of impact factors. It has been observed that a Gamma distribution fits the observed data very well with one of the parameters as mean of the distribution and other parameter as 1. Further it has been observed that the researchers are now publishing their articles in high impact factor journals.     

Hepatic Enzyme’s Reference Intervals and Their Modulating Factors in Western Indian Population

The reference intervals (RIs) of serum aminotransferases and Gamma-glutamyl transferase (GGT) have been established many years ago. Recent RIs are not available. The prospective study was conducted to re-evaluate the RIs of liver enzymes and the effect of demographic and anthropometric variables on them in western Indian population. A total of 1059 blood donors comprised the study population. Anthropometry and serum liver enzymes levels were measured. Subjects were categorized into normal weight and overweight by using body mass index (BMI) and waist circumference (WC). For RI determination, non-parametric methodology recommended by IFCC/CLSI was adopted. Mann–Whitney test and Spearman’s rank correlation were used for statistical analysis. Upper limit of normal reference value of liver enzymes were lower in female compared to male. (ALT—23.55 F vs 36.00 M, GGT—34.58 F vs 36.20 M) When RI of liver enzymes were calculated according to body mass index, the upper limit of normal of ALT and GGT were higher in overweight group compared to normal weight group. (ALT—38.00 vs 27.00 IU/L and GGT—37.59 vs 35.26 IU/L). In both male and female, liver enzymes correlated significantly with age. WC and BMI were positively correlated with AST, ALT and GGT in both subgroups and the correlation was stronger in male. Demographic factors should be considered for making liver enzyme tests more clinically relevant. Gender based partitioning should be adopted for serum alanine aminotransferase (ALT) and GGT reference values for Western Indian population.     

多调和算子Dirichlet特征值下界的一种估计

通过构造热核函数的部分和,我们给出了多调和算子Dirichlet特征值的一个新的下界估计,新的估计式推广了已有的特征值估计的结果。     

复Gamma函数的定义形式及其等价证明的探讨

Gamma函数在复分析中占据了一定的地位。由于复数的复杂性,复分析中的Gamma函数产生了许多与数学分析中的Gamma函数不同的性质。Gamma函数的定义形式不唯一,它在复分析中主要有四种定义形式。试图系统地给出这四种定义形式的等价证明（其中,④■①为本人自己尝试给出的证明）。     

两类风险过程总理赔量的Bower的Gamma函数近似

考虑了含两个类的风险过程,首先介绍了复合Poisson分布的一些性质,在此基础上给出了含两个类的风险过程的总理赔量的Bower的Gamma函数近似．     

两类风险过程总理赔量分布的平移伽玛近似

考虑了含两个类的风险过程,首先介绍复合Poisson分布的一些性质,在此基础上给出了含两个类的风险过程总理赔量分布的近似,并对指数理赔分布的情形给出数值计算结果。     

新型农村合作医疗的医疗费用分布模型研究

文章简述福建省莆田市荔城区某镇的新型农村合作医疗制度发展的状况,研究在区级及区级以下的医院设置0起付线和较高补偿比下、医疗费用取对数后出现双峰分布现象,用混合对数伽玛分布模型去按拟合,探索医疗费用收支运营的稳定性和可行性。     

Studies of biochemical parameters in breast cancer with and without metastasis

The study includes 102 confirmed cases of carcinoma breast with and without metastasis and 25 healthy non-pregnant females. They were evaluated for blood levels of Ferritin, GSH, LDH, ALP, GGT and Hb before and 21 days after mastectomy. A significant increase (p<0.001) was observed in ferritin, LDH and GSH levels in cancer patients without metastasis in comparison to normal control subjects. Patients with metastasis had further elevated (p<0.001) levels of Ferritin, ALP and GGT as compared to non-metastatic patients. Mastectomy in both the cases i.e. with and without metastasis resulted in non-significant decrease in all the biochemical parameters suggesting that longer follow up could confirm post surgery decrease in the biochemical parameters. The results of the study suggest cost effective, usefulness of Ferritin, ALP, GGT and GSH/Hb ratio in differentiating breast cancer patients with and without metastasis which can be assayed in smaller laboratories.     

Urinary N-acetyl beta glucosaminidase and gamma glutamyl transferase as early markers of diabetic nephropathy.

Albumin and enzymes-N-acetyl-beta-glucosaminidase (NAG) and gamma glutamyl transferase (GGT) were estimated in the morning random urine samples of 196 albustix negative diabetic patients to evaluate the clinical utility of these urinary enzymes as early markers of diabetic nephropathy. Albumin was estimated by immunoturbidimetric method and enzymes by linetic essay within six hours of voiding of urine. The urinary albumin and urinary enzyme concentration was calculated in terms of ratio with respect to urinary creatinine. Correlation coefficient (r) bewween urinary albumin and urinary enzymes in normoalbuminuric, microalbuminuric and overall diabetic cases was 0.23, 0.32 and 0.40 respectively for NAG, and 0.08, 0.06 and 0.18 respectively for GGT. NAG excretion was found increased in 34%, 63.7% and 49.5% of normoalbuminuric, microalbuminuric and overall diabetic cases respectively while GGT in 6.4%, 24.5% and 15.8%. The correlation coefficient between urinary albumin and NAG in normoalbuminuric, microalbuminuric, and overall diabetic patients with increased NAG excretion was found only 0.31, 0.27 and 0.35 respectively. No correlation was found between duration of diabetes and enzyme excretion. The study suggests that urinary NAG or GGT or both together do not have any clinical significance as an early marker of diabetic nephropathy.     

国产LaBr3：Ce晶体性能表征

作为近年来发展起来的新晶体,LaBr3：Ce有着很高的发光产额（~60000p/MeV）和较快的发光衰减时间常数（~16ns）,因而成为研究热点。国内对LaBr3：Ce晶体的研究还不多,仅少数几家单位具备研究生产条件。本工作采用北京华凯龙电子有限公司生产的LaBr3：Ce晶体（晶体尺寸为椎30mm×20mm）,配合XP20D0光电倍增管,采用单光电子方法测量得到其光电子产额为16800p.e/MeV;并测量了其发光衰减曲线,计算得到上升时间为5.6ns,发光衰减时间常数为21ns;其对137Cs的能量分辨率为3.3%。采用两块椎30mm×20mm的LaBr3：Ce晶体与两只XP20D0光电倍增管,测量得到对2 Na的符合时间分辨率为191ps;这些表征为国产LaBr3：Ce晶体的酌谱仪研究工作提供了重要参考。