Effects of Organic Load on Basic Geotechnical Properties of Compacted Sand-kaolinite Mixture

In the laboratory, four PVC sand-kaolinite mixture columns, each of 150 cm depth and 15 cm diameter, were fed with solutions of sodium acetate equivalent to 20,000 p.p.m., 30,000 p.p.m., 40,000 p.p.m., and 50,000 p.p.m. BOD (biochemical oxygen demand). Soil physical and chemical properties, such as Atterberg limits, specific gravity, soil pH and soil organic content, altered markedly within 40 days of continuous feeding. The results showed that feed with higher BOD values increased the soil organic content as well as soil pH; and thereby the specific gravity and Atterberg limits were lowered

Three-dimensional modulation instability of dust-ion-acoustic waves and rogue waves in warm nonthermal magnetized plasmas

A theoretical investigation has been made to study the modulation stability/instability of three-dimensional dust-ion-acoustic wave packets in the warm magnetized complex plasma system in the presence of nonthermal distributed electrons and positrons species. The set of equations describing our plasma system has been reduced to a (3+1)-dimensional nonlinear Schr\"odinger equation by using the reductive perturbation method that is valid for finite but small amplitude limits. It is observed that both nonlinear and dispersive coefficients of (3+1)-dimensional nonlinear Schr\"odinger equation are significantly modified by the external magnetic field and transverse velocity perturbation. The regions of stable and unstable for the modulated dust-ion-acoustic waves have been examined numerically. Moreover, the dependence of modulation instability and rogue waves on the relevant plasma parameters is discussed. The implications of our theoretical results in space and laboratories magnetized dusty plasma medium is briefly discussed.Comment: 7 pages, 9 figures, original articl

Investigation on The Factors Affecting Lifestyle of Professionals in The Construction Industries (Kerala and Tamil Nadu)

One of the vital assets of any industry is human resources. In general, the majority of works are carried out by humans in the construction industries. Study on the assessment of quality of civil engineering construction professionals’ lifestyle is very limited and hence the motto of this study is to understand the lifestyle of construction professionals and to assess the various factors affecting the lifestyle of them. To analyze the effects of societal behavior and to develop a model to study the impact of various factors in a construction professional’s lifestyle; a mixed approach had been adopted in this study. The instrument used in the study was a questionnaire survey conducted from 180 construction professionals working in different firms in Kerala and Tamil Nadu states of India and these were analyzed using structural equation modeling techniques. Factors affecting the construction professional’s lifestyle are: financial factors, organizational factors, quality, health and environmental factors, work-related factors, and social factors. Hence by foreseeing the factors and adopting favorable changes in a construction professional’s life, they may attain a better lifestyle. This study recommends the strategy to be considered for the improvements of lifestyle of the construction professional especially for “Civil Engineersâ€