Archives-June... 

Application of biological mechanisms or employment of microorganisms is in practise for many years in the treatment of sewage. In the present study selected microorganisms (Pseudomonas sp., Klebsiella sp., E.coli, Lactobacillus sp., and Candida sp., were employed to treat the sewage of a local hospital. This sewage is found to contain considerable quantity of alcohol and phenol. The efficiency of the above cultures either separately or in different combinations was studied. The original levels of BOD (285 mg O2/l) and COD (680 mg O2/l) of the sewage were reduced to 16.4 O2/l and 260 O2/l respectively in 72 h when sterile sewage was incorporated with Pseudomonas sp. at a level of 26 X 10 5 CFU/ml. The corresponding BOD and COD in the control was 79 mg O2/l and 655 mg O2/l. The Candida sp., at an incorporation level of 35 X 105 CFU/ml reduced the BOD and COD of the sewage to 18.3 mg O2/l and 240 mg O2/l respectively. E.coli, Lactobacillus sp., Klebsiella sp., at an incorporation level of 28 X 10 5, 27 X 10 5 CFU/ml reduced BOD to 23.6, 19.9, 26.5 mg O2/l respectively. From the original value of 160 mg/l, nitrate reduced to 8.9, 46.8, 4.3, 49.2 and 6.8 mg/l respectively when Pseudomonas sp., Klebsiella sp., E.coli, Lactobacillus sp., and Candida sp., were incorporated separately in the sewage. The value in control was 135 mg/l mg/l at 72 /h of incubation. The phosphate was reduced to 4.7, 3.9, 2.8, 5.3 and 2.9 mg/l respectively. The value in the control was 10.8 mg/l. The above said cultures (Pseudomonas sp., Klebsiella sp., E.coli, Lactobacillus sp., and Candida sp.,) were mixed at a ratio of 26:23:28:27:35 and incorporated in the sewage at a mixed population of 120 X 10 5 CFU/ml which reduced the BOD to 14.2 mg O2/l and COD to 138 mg O2/l in 48 h of incorporation. Thus it was found that the efficiency of mixed cultures found to be higher than the individual cultures.

The purpose of this article is to compute the reliability measures of an automobile assembly plant. An automobile assembly plant consists of five sub-systems working in series as: Vendor (supply steel metal and body parts), Weld shop, Paint shop, Assembly shop and Quality department. Weld shop and Assembly shop has the configuration 2-out-of -3: G and 1-out-of-3: F. Considered system can completely fail due to failure of any of the subsystems. It is also assumed that the system can fail due to machine failures. Machine failures can be major or minor. All failures follow exponential time distribution whereas all repairs follow general time distribution. Preventive maintenance policy has been applied to reduce the failure in the system. Risk analysis has been made which may occur due to the mistake of quality department in quality checks. Various reliability characteristics such as transition state probabilities, steady state behaviour, reliability, availability, M.T.T.F, sensitivity analysis and the cost analysis have been obtained using supplementary variable technique and Gumbel-Hougaard copula methodology. We also perform a parametric investigation which provides numerical results to show the effects of different system parameters to the reliability and MTTF which may be helpful to managerial staff of the industry in the decision making.

VLSI Industry is moving at high speed towards miniaturization. With miniaturization it faces a problem of power and heat dissipation. Thus we need a superior technology that circumvents this problem. Solution is implementing Reversible logic. A lot of research has been already done in the field of reversible computing. This paper presents a review of such reversible sequential circuits in literature from basic elements to complex circuits.

Rotation and radiation effects on MHD flow through porous media past an impulsively started vertical plate with variable temperature is studied here. The fluid considered is gray, absorbing-emitting radiation but a non- scattering medium. The governing equations involved in the present analysis are solved by the Laplace transform technique. The velocity, temperature and skin friction are studied for different parameters like Thermal Grashof number, Prandtl number, magnetic field parameter, rotation parameter, radiation parameter, permeability of porous media and time.

The present study investigated the relationship between attachment to school and Creativity. Study population of research is of all primary school students in Harsin city in iran that those were enrolled in the academic year from 2011 to 2012. And a sample of 120 subjects was selected by multistage random sampling. The tools used in this study include: Scale of attachment to school that measures dimensions of school attachment, peer attachment, and attachment to the teacher. For data analysis, software spss18, Pearson correlation and multiple regression techniques were used. The results showed there are significant positive correlation between the independent and dependent variables.

Electrocoagulation is an emerging water treatment technology that has been applied successfully to treat various wastewaters such as potable water, urban wastewater, heavy metal laden wastewater, restaurant wastewater, and colored water. Electrocoagulation offers possibility of anodic oxidation and in situ generation of adsorbents (such as hydrous ferric oxides, hydroxides of aluminum) on which As(III) might be oxidized to As(V) gets adsorbed on to the metal hydroxides (HFO) generated. Therefore, electrocoagulation would be a better choice for arsenic removal from water. In the present study an attempt has been done to develop a simple process employing electrocoagulation with iron electrodes and separation of HFO has been achieved by cloth filtration. Arsenic laden water is passed through a double layer cotton cloth in 2 L volume beaker at flow rate 44ml/min with current 0.2 ampere at pH 7.0. Results show that arsenic levels below 50 ?g/L would e achieved which is drinking water standard in India and Bangladesh.

Solitary fibrous tumor (TFS) is a rare tumor. It is localized preferentially at the pleura. Other locations have been described. These are peritoneal, bronchopulmonary, orbital and mediastinal locations. We report the case of a 49-year-old patient followed for parathyroid adenoma who presented with bone pain, muscle pain, fatigue, dry cough and dyspnea. The clinical examination was without abnormality. Chest X-ray showed a superior mediastinal opacity. Cervicothoracic computed tomography indicated a mass at the lower right pole of the thyroid and a tissue process of the upper mediastinum. A cervicotomy was performed for the removal of the parathyroid adenoma. On the other hand, an attempt at dissection of the mediastinal mass by the cervical route was inconclusive, and a manubriotomy was necessary for its extraction. The histo-pathological study confirmed the parathyroid adenoma for the cervical mass; and solitary fibrous tumor for the mass of the superior mediastinum.

In this article, the homotopy perturbation method (HPM) and Kamal transform are introduced for obtaining the approximate analytical solution of the Linear and Nonlinear Schrodinger Equations. The proposed method is an elegant combination of the new integral transform “Kamal Transform” and the homotopy perturbation method.

This article study believes of the birth and the new born. Some of them tell us how to support and take care of a pregnant woman and some believes tell us how to recognize whether the fetus is boy or girl. They believe according to child behavior and appearance, they can predict child future. Doing magic and resorting to wizardry for preventing the bad event which may happen to the mother and the newborn in this research is so noticeable.

A subgroup is said to be weakly -normal in a group if there exists a subnormal subgroup such that and is -quasinormally embedded in . We give some conditions for supersolvability of finite groups .