134 research outputs found
A note on the values of the weighted q-Bernstein polynomials and modified q-Genocchi numbers with weight alpha and beta via the p-adic q-integral on Zp
The rapid development of q-calculus has led to the discovery of new
generalizations of Bernstein polynomials and Genocchi polynomials involving
q-integers. The present paper deals with weighted q-Bernstein polynomials and
q-Genocchi numbers with weight alpha and beta. We apply the method of
generating function and p-adic q-integral representation on Zp, which are
exploited to derive further classes of Bernstein polynomials and q-Genocchi
numbers and polynomials. To be more precise we summarize our results as
follows, we obtain some combinatorial relations between q-Genocchi numbers and
polynomials with weight alpha and beta. Furthermore, we derive an integral
representation of weighted q-Bernstein polynomials of degree n on Zp. Also we
deduce a fermionic p-adic q-integral representation of product weighted
q-Bernstein polynomials of different degrees n1,n2,...on Zp and show that it
can be written with q-Genocchi numbers with weight alpha and beta which yields
a deeper insight into the effectiveness of this type of generalizations. Our
new generating function possess a number of interesting properties which we
state in this paper.Comment: 10 page
A note on the (h,q)-Zeta type function with weight alpha
The objective of this paper is to derive symmetric property of (h,q)-Zeta
function with weight alpha. By using this property, we give some interesting
identities for (h,q)-Genocchi polynomials with weight alpha. As a result, our
applications possess a number of interesting property which we state in this
paper.Comment: 7 page
Aetiology and Clinical Presentation of Pneumonia in Hospitalized and Outpatient Children in Northeast Brazil and Risk Factors for Severity
Data on presentation, aetiology, and prognostic indicators of childhood
pneumonia, which can help design strategies for controlling the
disease, are generally scarce in developing countries. In this paper,
the distribution of aetiologic agents, clinical presentation, and
evolution of pneumonia cases are described, and the factors associated
with duration of pneumonia episode and of hospital admission examined.
During June 1994-June 1995, 472 children, aged 6-59 months, with
clinical diagnosis of pneumonia, who were admitted to hospital or
treated as outpatients, were investigated in Recife, Northeast Brazil.
Pneumonia, in most cases, was confirmed by radiology. A combination of
methods was used for investigating the aetiology of pneumonia. Data
obtained on a large number of clinical, socioeconomic and biological
variables were analyzed to determine the prognostic factors for the
severity and outcome of pneumonia. Bacteria were identified in 26.7% of
the cases, while viruses and mixed infections accounted for 8.4% and
2.7% respectively. Haemophilus influenzae (18.9%), Streptococcus
pneumoniae (6.4%), and respiratory syncytial virus (5.0%) were most
often identified. The pneumonia case-fatality rate was 0.8%. The best
clinical predictors of severity were: lung complications at baseline,
tachypnoea (for duration of episode), and chest-indrawing (for duration
of hospital admission). Young age, low birth-weight, and prolonged
fever prior to admission to the study also predicted a more prolonged
illness, and under-nutrition was a predictor of longer hospital stay.
While the development of new vaccines is an important measure for
reducing morbidity and mortality due to pneumonia, emphasis on
appropriate case management needs to be maintained, with particular
attention to children who show the identified risk factors for a poor
prognosis
Development of Photonic Crystal Fiber Based Gas/ Chemical Sensors
The development of highly-sensitive and miniaturized sensors that capable of
real-time analytes detection is highly desirable. Nowadays, toxic or colorless
gas detection, air pollution monitoring, harmful chemical, pressure, strain,
humidity, and temperature sensors based on photonic crystal fiber (PCF) are
increasing rapidly due to its compact structure, fast response and efficient
light controlling capabilities. The propagating light through the PCF can be
controlled by varying the structural parameters and core-cladding materials, as
a result, evanescent field can be enhanced significantly which is the main
component of the PCF based gas/chemical sensors. The aim of this chapter is to
(1) describe the principle operation of PCF based gas/ chemical sensors, (2)
discuss the important PCF properties for optical sensors, (3) extensively
discuss the different types of microstructured optical fiber based gas/
chemical sensors, (4) study the effects of different core-cladding shapes, and
fiber background materials on sensing performance, and (5) highlight the main
challenges of PCF based gas/ chemical sensors and possible solutions
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