83 research outputs found
STREAM DEPTH SIGNIFICANCE DURING IN‐SITU SEDIMENT OXYGEN DEMAND MEASUREMENTS IN SHALLOW STREAMS
Ninety-one sediment oxygen demand (SOD) samples from six designated sites along the stretch of Lower Rapid Creek, South Dakota, were conducted using an in-situ SOD chamber. Inside the chamber, readings of dissolved oxygen (DO), water temperature, pH, and specific conductance were recorded every minute for more than one hour using the Datasonde 3 Hydrolab. Initial readings of such parameters were recorded for the overlaying water before the deployment of the SOD chamber. Characteristics of the stream conditions, air temperature, barometric pressure, average flow velocity of the stream, depth of the stream, and the flow velocity by the chamber were recorded. Single and multiple linear regression analyses on all parameters indicated that the velocity of the stream is the least critical parameter for SOD in shallow streams
Assessment of the Use of Household Chemicals in Al-Karak Governate, Jordan
The objective of this study was to evaluate the major factors that influence the correctness of household chemical utilization in the Jordanian households. The practices in the use of household chemicals of 1200 women in Al-Karak Governate of the country of Jordan were surveyed through a quantitative questionnaire in 2009. The results were analyzed in population sets grouped by different demographic relationships (i.e., age, level of education, family size, number of working members and geographic location). Analysis of Variation (ANOVA) of the population means based on these groupings was conducted. The results indicated that age, level of education, family size and number of working members were all important and statistically significant factors in the proper use of household chemicals in the study area. The means of the population sets based on geographic distribution did not vary significantly indicating that education on the proper use of household chemicals is needed throughout Jordan
Shape invariant potential formalism for photon-added coherent state construction
An algebro-operator approach, called shape invariant potential method, of
constructing generalized coherent states for photon-added particle system is
presented. Illustration is given on Poschl-Teller potential
A functional approach to estimation of the parameters of generalized negative binomial and gamma distributions
The generalized negative binomial distribution (GNB) is a new flexible family
of discrete distributions that are mixed Poisson laws with the mixing
generalized gamma (GG) distributions. This family of discrete distributions is
very wide and embraces Poisson distributions, negative binomial distributions,
Sichel distributions, Weibull--Poisson distributions and many other types of
distributions supplying descriptive statistics with many flexible models. These
distributions seem to be very promising for the statistical description of many
real phenomena. GG distributions are widely applied in signal and image
processing and other practical problems. The statistical estimation of the
parameters of GNB and GG distributions is quite complicated. To find estimates,
the methods of moments or maximum likelihood can be used as well as two-stage
grid EM-algorithms. The paper presents a methodology based on the search for
the best distribution using the minimization of -distances and
-metrics for GNB and GG distributions, respectively. This approach, first,
allows to obtain parameter estimates without using grid methods and solving
systems of nonlinear equations and, second, yields not point estimates as the
methods of moments or maximum likelihood do, but the estimate for the density
function. In other words, within this approach the set of decisions is not a
Euclidean space, but a functional space.Comment: 13 pages, 6 figures, The XXI International Conference on Distributed
Computer and Communication Networks: Control, Computation, Communications
(DCCN 2018
An integrative review of facilitators and barriers influencing collaboration and teamwork between general practitioners and nurses working in general practice
Understanding the tourist phenomenon : an analysis of 'west'-'south' tourism : towards sustainable tourism development strategies for Third World tourism destination
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