The objective of this study was to identify water pollution problems and obtain useful information for the sustainable extraction of water from the Culiacan River aquifer. Data from 6 sampling sites were used in the period from 2012 to 2019. A spatial geostatistical analysis was carried out to describe the water quality of the aquifer by using isoconcentration contours. Likewise, a hydrogeochemical evaluation was carried out using seven water quality indices for irrigation purposes (SAR, CSR, SSP, KR, % Na, MH, PI). Finally, a multivariate statistical analysis was obtained through the analysis of principal components, Pearson correlation and cluster analysis identified the most important water quality variables in the Culiacan River aquifer based on their variability. The water quality index showed that the aquifer water quality was good in five sampling sites and excellent in one sampling site. Based on average concentrations, the ion content was Na2+ >HCO3- >Ca2+ >Mg2+ >Cl- >SO42- >K+, which did not present any ecological or public health risk. Finally, Sample Point 1 (SP1) was the location most affected by anthropogenic contamination. This site is within an urban area and is the shallowest sampling well.
We shall present a new idea of search problems that is the Coordinated search\nfor a randomly moving target on a line according to a stochastic process. We have two searchers start together looking for the lost target from the origin. In this paper we give the necessary and sufficient condition for existence of a finite search plan
Today, numerous illnesses by the consumption of chemical products has caused that people tend to consume natural products. Hence, in addition to respect environmental problems, companies have to regard consumer’s health in producing their products. The aim of present paper is to study the affecting factors on intent to by skin and hair organic cosmetic products by using theory on planned behavior. \nIn terms of purpose, this is an applied research while it is a descriptive – survey (correlation) and a field study in terms of methodology nature. Needed information is gathered by a questionnaire while Pearson’s correlation, regression analysis and SPSS software packages are used to analyze data. To this end, a 384 – subject sample was estimated and for more confidence, 400 questionnaires were distributed among Arak’s citizens. Finally, 360 questionnaires were returned and analyzed. \nThe findings indicate that attitude toward skin and hair organic cosmetic products, consumer’s perceived behavioral control and past pleasant experiences on consuming organic products impact on his/her intent to buy positively and directly while the hypothesis regarding the impact of consumer’s subjective norms on intent to buy skin and hair organic cosmetic products are not supported. \nConcerning research limitations, one can point that many people were unfamiliar with organic product terms despite of consuming it and it enforced the author to get them familiar with such products initially. Likewise, lack of organic cosmetic product shops made delays in questionnaire collection process. Finally, producers are recommended to take decisions and strategies to change consumers’ attitudes toward consuming skin and hair organic cosmetic products. \nBy extending the theory of planned behavior, present paper studies affecting factors on skin and hair organic cosmetic products; so, it is considered as a novel study in this regard.