Some stochastic Property of topological action semigroups

Under suitable conditions, with respect to some property on a random iterated function system(RIFS), it is shown how the system satisfies in this property almost surely.Comment: 9 page

The topological fundamental group and free topological groups

The topological fundamental group $\pi_{1}^{top}$ is a homotopy invariant finer than the usual fundamental group. It assigns to each space a quasitopological group and is discrete on spaces which admit universal covers. For an arbitrary space $X$, we compute the topological fundamental group of the suspension space $\Sigma(X_+)$ and find that $\pi_{1}^{top}(\Sigma(X_+))$ either fails to be a topological group or is the free topological group on the path component space of $X$. Using this computation, we provide an abundance of counterexamples to the assertion that all topological fundamental groups are topological groups. A relation to free topological groups allows us to reduce the problem of characterizing Hausdorff spaces $X$ for which $\pi_{1}^{top}(\Sigma(X_+))$ is a Hausdorff topological group to some well known classification problems in topology.Comment: 33 page

Analytical-Toxicological Studies of Environmental Importance.

Part One. Acidity and chemical composition of precipitation in Baton Rouge, Louisiana; The synergistic effects of acidity and aluminum on fish. Acid precipitation which consists of both wet precipitation and dry deposition has recently become a significant environmental problem. It has been shown that the effects of acid rain are deleterious to soil, vegetation, aquatic life and buildings. Wet-precipitation-only samplers were used to collect acid rainfalls in the vicinity of Louisiana State University, Baton Rouge and subjected to appropriate chemical analysis for the purpose of characterization of general composition and acidity. About 50% of precipitation is within pH range of 4.0-5.0. Acidity is largely due to the presence of sulfuric and nitric acid. There is seasonal variation in acidity of precipitation, namely rain water is more acidic in summer than winter. Study of pH of rainfall versus wind directions indicated no correlation between average pH and any specific local wind directions. Light showers yielded much higher values of conductance than did large storms. The concentration of the major anions (SO\sb4\sp{-2}, NO\sb3\sp-, Cl\sp{-}) and major cations (Na\sp{+}, NH\sb4\sp{+}, K\sp{+}) were measured utilizing ion chromatography. Inductively coupled plasma was utilized in determination of minor trace metals in the precipitation. Addition of aluminum ion to acidified waters caused increased toxicity to aquatic life, especially in the pH range of 4.5-5.0. Part Two. Electrochemical preconcentration of trace mercury on carbon fiber for atomic absorption analysis; Capillary GC-AA for speciation of mercury compounds. Speciation is critically important in assessing the potential toxic effects of a specific element on susceptible organisms and ecosystems. Mercury and its compounds are highly toxic and organomercury compounds are far more toxic than elemental or inorganic mercury. A capillary gas chromatographic interfaced atomic absorption unit has been developed and used for the speciation and determination of volatile mercury compounds in environmental samples. Use of AA as a specific detector for GC combines the high resolving power of chromatography with specificity, selectivity and sensitivity of AA for the determination of organometallic compounds in environmental samples. Mercuric chloride, methyl mercuric chloride, and dimethyl mercury were separated. Resolution was excellent and reproducibility is within 5-10%. 100 pg of mercury can easily be detected. (Abstract shortened with permission of author.)

Investigating the Effective Factors on Electronic Trade by Viral Marketing (Case Study: Clients of Websites in Iran)

While the process of viral marketing is often perceived as a random phenomenon with marketers having little or no control over the process, getting your customers to spread your brand messages throughout a widespread network of buyers makes good business and marketing sense. This paper uses case study examples to explore a number of strategies underpinning this apparently chaotic phenomenon. Further, several suggestions are offered for marketers seeking to use viral marketing to position brands or change a brand’s image, encourage new product trials and increase product uptake rates. In this article, we want to investigate the effect of External factors such as: capturing the imagination, Targeting credible sources, Leveraging combinations of technology and Easy to use product and also internal factors such as: inclusion (the need to be part of a group, the need to be different)and affection on viral marketing. So, our population statistical is client of websites in Iran and the amount of sample according to Cochran formula is 140 person. For testing the data, we use from SPSS 19 with correlation and regression, according to finding all of the hypothesis are accepted