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11.
N. K. Srinivasan 《Resonance》2001,6(4):69-77
Most systems involve parameters and variables, which are random variables due to uncertainties. Probabilistic methods are powerful in modelling such systems. In this second part, we describe probabilistic models and Monte Carlo simulation along with ‘classical’ matrix methods and differential equations as most real situations are complex (with several variables) and involve uncertainties. 相似文献
12.
AbstractThis article describes work being done at Ahfad University for Women in Omdurman, Sudan, to document and catalog indigenous knowledge (IK) materials. The recognition and appreciation of IK taps into the intellectual resources associated with it. Librarians, as major workers in the knowledge society, have to recognize their roles in the incorporation of IK into the “scientific knowledge system” with which they are familiar. 相似文献
13.
Long before the complex pressure-temperature phase diagram of plutonium (shown below) was determined, Cyril Stanley Smith’s
suggestion that adding small amounts of some impurity atoms to liquid plutonium might retard its undesirable transformation
to the brittle alpha phase enabled the fabrication of the world’s first nuclear device tested successfully in New Mexico on
July 16, 1945. 相似文献
14.
Pratibha Dixit Shally Awasthi Nutan Maurya Sarita Agarwal M. Srinivasan 《Indian journal of clinical biochemistry : IJCB》2015,30(1):35-42
Cystic Fibrosis Trans membrane conductance regulator (CFTR) gene is an asthma susceptibility gene. In the present study we investigated the possible association of CFTR gene mutations in Indian asthmatic children as compared to controls. The study included 250 asthmatics and 250 age and sex matched controls. Case to control ratio for sample size was 1:1. Genotyping was performed for 24 CFTR gene mutations by ARMS-PCR and PCR–RFLP method. Among 24 CFTR gene mutations, heterozygous allele of R553X mutation was found in 4 (1.6 %) asthmatic cases and 2 (0.8 %) controls. Value of FVC and FEV1/FVC ratio were significantly lower in heterozygous individuals (p value <0.05). No significant difference was observed in the genotype and allele frequency of R553X mutation (OR = 1.339, 95 % CI = 0.755–2.374, p value = 0.685). Furthermore, all wild type homozygous alleles were observed in remaining 23 CFTR gene mutations. Our data concludes that R553X mutation was not significantly associated in Indian asthmatic children. 相似文献
15.
Srinivasan Natarajan 《Resonance》2000,5(5):95-100
Conclusions As can be seen from the above, due to the marginally higher half-life of Bh, some experiments could be carried out to find
out about the chemical nature of the element. Since the elements are produced in extremely small quantities (a few atoms in
many cases), it is difficult to confirm the stability of most of these elements. If the half-lives are as long as predicted
(region of stability), and there are sufficient yields, there are exciting possibilities for chemical studies of the super-heavy
elements. It is likely that the heavy elements may also have multiple oxidation states. In this context, 10–100 atoms of the
super-heavy species are needed depending on the half-life. If, on the other hand, we are limited to a few atoms of these super-heavy
species, it is likely that any further use of them would be very restricted. However, the Holy Grail of super-heavy elements
has been one in which one began by creating a handful of atoms and perhaps, one day we may learn to produce them in sufficient
quantity for real chemical investigations. 相似文献
16.
Hariprasad G Srinivasan A Vedakumari Y 《Indian journal of clinical biochemistry : IJCB》2011,26(1):82-83
Clinical proteomics encompasses the study of the proteins in the human body at different settings to understand the various
physiological and pathological pathways. The processing of the samples for electrophoresis based proteomics is a challenge
to any researcher. Salt in particular can have an array of effects during the electrophoretic separation of proteins. There
is a definite need to determine the concentration of salts in the samples and the effectiveness of salt removing protocols
on small volume samples. A simple-cost effective technique to know the salt concentration in the clinical proteomics samples
has been highlighted in the report. The application will be of value in a developing country such as India. 相似文献
17.
18.
Hierarchical Text Categorization Using Neural Networks 总被引:8,自引:1,他引:7
This paper presents the design and evaluation of a text categorization method based on the Hierarchical Mixture of Experts model. This model uses a divide and conquer principle to define smaller categorization problems based on a predefined hierarchical structure. The final classifier is a hierarchical array of neural networks. The method is evaluated using the UMLS Metathesaurus as the underlying hierarchical structure, and the OHSUMED test set of MEDLINE records. Comparisons with an optimized version of the traditional Rocchio's algorithm adapted for text categorization, as well as flat neural network classifiers are provided. The results show that the use of the hierarchical structure improves text categorization performance with respect to an equivalent flat model. The optimized Rocchio algorithm achieves a performance comparable with that of the hierarchical neural networks. 相似文献
19.
Tangirala Malati D. Murali Mohan Krishna V. R. Srinivasan V. Shantharam 《Indian journal of clinical biochemistry : IJCB》1992,7(2):138-142
Glycosylated Hemoglobin (GHb) was estimated using cation exchange resin binding method in 50 non diabetic healthy controls and 500 maturity onset diabetics. Percentage of glycosylated hemoglobin levels in controls was 7.27±0.456 (range 6.0–8.04) and 9.47±0.98 (range 8.2–13.63) in diabetic group. Glycosylated hemoglobin levels remain unaffected inspite of transient rise of serum glucose levels during an oral glucose tolerance test. Significantly elevated GHb A1. Furthermore significant elevation of GHb A1 was noticed in diabetics with all secondary complications suggesting poor glycemic control in these patients. The diabetics having retinopathy, nephropathy or diabetic foot had relatively higher GHb levels compared to patients having coronary artery disease or hypertension. 相似文献
20.
Bharati V. Badami 《Resonance》2008,13(11):1041-1048
Green chemistry is the utilization of a set of principles that will help reduce the use and generation of hazardous substances
during the manufacture and application of chemical products. Green chemistry aims to protect the environment not by cleaning
up, but by inventing new chemical processes that do not pollute. It is a rapidly developing and an important area in the chemical
sciences. Principles of green chemistry, developments in this field and some industrial applications are discussed. 相似文献