International Journal of Advanced Research in

Science and Technology (IJARST)


Volume 4 - Issue 5 | 2015


01. Evaluation of Physico-Chemical Parameters to Assess the Water Quality of Fox Sagar Lake, Jeedimetla, Hyderabad, India.

Mohamemed Kadhem Abid* and Praveen Raj Saxena

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Highlights

Physico-chemical characteristic study has been carried out on Fox Sagar Lake water of Hyderabad City, Telangana State. Lake water from 14 different locations were collected and analyzed for parameters like pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Total Alkalinity (TA), Total Hardness (TH), Calcium (Ca2+), Magnesium (Mg2+), Sulphate (SO42-), Nitrate (NO32-), Fluoride (F-) and chloride (Cl) levels. The analytical results indicated that lake waters are slightly acidic to alkaline in nature and found that the physico-chemical parameters of lake waters are higher than the prescribed standard limits for drinking purposes (IS 10500: 2012).

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02. Calcium, phosphate and hydroxyproline as bone turnover markers in adults of 45 to 60 years age group.

V. Bhavani* and G. Uma Ramani

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The present study is an attempt to monitor the role of bone biochemical markers (calcium, phosphorous and hydroxy proline) in males and females of 45 to 50 years age group and compare their levels with osteoporotic condition. Blood and urine samples was collected from the individuals and subjected to marker analysis. Significantly higher levels of calcium, phosphorous and hydroxy proline were observed in osteoporotic patients compared to normal patients. Female osteoporotic patients possess higher levels of calcium, phosphorous and hydroxy proline compared to male. Assessment of bone biochemical markers provides the valuable information about the risk of the individual towards bone diseases.

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03. Floral Phenology of Delonixregia(Boj. Ex Hook) Raf. (Family: Caesalpiniaceae).

G. Sujan Chandar*, K. Ella Rao, M. Bhupathi Rayalu and J.B. Atluri

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The various parameters included in the study are blooming phenology at the population, individual and inflorescence levels, floral dynamics like timing of anthesis, and anther dehiscence, floral architecture, mode of pollen presentation, pollen number per anther, pollen-ovule ratio, pollen viability, stigma receptivity, nectar secretion and quantity. Based on the data relating to these parameters of Delonixregia(Boj. ex Hook.) Raf. described and discussed. The trees of D. regia bloomed after leaf shedding. It flowers during March – September. The period of blooming extended over 128.5 (R = 97 - 158) days. The flowers per raceme were 11-14. They matured intermittently in acropetal succession; the gap was 2-3 days between the maturation of flowers. Flowering life of an inflorescence varied from 16-19 days, with actual flowering occurring on 6-8 days. On any day 1-3 flowers opened, two being more common.

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04. Some investigations into the sinker type EDM of hybrid alsic MMC using RSM approach.

H. K. Amarnath, S. C. Kulkarni* and Kiran B. Menasagi

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The present study deals with preparation of metal matrix composites(MMC), Aluminium (Al 6061) used as base material is reinforced with 3wt. % silicon carbide and 3wt. % Aluminium oxide (3wt. %SiC+3wt. %Al2O3) by stir casting method. The objective of this project is to investigate the effect of process parameters such as current (I), pulse on time (Pon) and pulse off time (Poff) on material removal rate (MRR) and tool wear rate (TWR) during electrical discharge machining (EDM) process. The tool used here is copper-tungsten. In this paper mathematical models are prepared by response surface methodology (RSM) and central composite design (CCD) for different combinations of process parameters. Analysis of variance (ANOVA) is used to check the significance of the model.

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05. To Detect and Isolate the Selective Packet Drop Attack in MANET

Anumati Thakur*, Max Bhatia and Bikramjit kaur

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The wireless ad hoc network is the self-configuring network; mobile nodes can leave or join the network when they want. These types of networks are much vulnerable to security attacks. Such type of active and passive attacks is possible in Ad hoc network. Among all the possible active attacks, Selective Packet Drop attack is the most common and harmful attack. The attack is triggered by the malicious node which is present in the network. In this research work, novel technique is proposed to detect and isolate malicious nodes from the network which are responsible for triggering the attack. In selective forward attack during transmission some packets gets dropped by the malicious node and that node will be acts as genuine node within the network. So incomplete data will be reach up to the destination. Therefore to detect and isolate malicious node from the network is difficult work to do. In previous work DSR Protocol was used to detect It by calculating the Energy Factor but not able to remove it completely. So, in this research work AODV protocol has been used. The new technique which is used in it is based on the Monitor Mode Approach. Through monitor mode technique messages would be flood across the channel in AODV mode and if any malicious node would be present, then instant acknowledgement would be given to source for retracing the path. This technique enhances the throughput level up to desired extent i.e. approx. 77% and other parameters like delay and packet loss also get reduced.

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06. Temporal variation of radioactivity at NARL, Gadanki.

Kamsali Nagaraja*, K Charan Kumar, B Pramodh, T Rajendra Prasad, T Narayana Rao and M Venkat Ratnam

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The activity concentrations of radon were measured using AlphaGuard PQ-2000PRO along with meteorological parameters at NARL, Gadanki, India. The diurnal and monthly variations of activities of radon show maxima in the early morning hours when the turbulence mixing is minimum; whereas in the afternoon the turbulence mixing is maximum and concentrations exhibit minima. The arithmetic mean of radon concentration is 11.67 ± 2.4 Bq m-3 for the year 2012. The diurnal variations have reached the maximum concentration of 26 Bq m-3 in December 2012. Observations show an increase in the concentration of radon during nighttime compared to the daytime values. Also observed is the diurnal variation of radon that exhibits a positive correlation with the relative humidity and is negatively correlated with ambient temperature of the atmosphere.

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07. Stature Estimation From Hand Prints: A Study in Rajasthan.

Sangeeta Dey*, Vijeta Choudhary and A.K Kapoor

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The Stature prediction occupies relatively central place both in identification and anthropological research, necessitated by the medico-legal experts. This paper attempts to establish identity from partial evidences to carry out further investigation in forensic and police examination. The study was conducted among Bhils of Udaipur, Rajasthan. The objective of the present study was to formulate regression equation to predict the stature from hand length and hand breadth (Direct & indirect from prints) and to find gender differences for estimation of stature among Bhil (males and females) of Rajasthan. From the present study, it has been observed that Hand length has come out as a better predictable variable to estimate the stature and the parameters are more efficient predictors in stature estimation for females than males. Thus, It can be said that more studies on various ethnic groups of India on the said topic be initiated for a proper data base and this will help in identifying the person on the basis of these measurements.

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08. Modeling of Leadscrew using stepper motor.

Priyabrata Biswal*, Girija Sankar Rath and Jagdish Chandra Pati

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Recent developments on actuator in the field of mechatronics leads to customization of various applications such as precision movement of robot arm or position control either in hardness testing machine or removing a work piece from conveyor. The design of stepper motor provides a constant holding torque without need for the motor to be powered & provided that the motor is used within its limits, positioning error don’t occur, since stepper motors have physically predefined stations. This communication provides the different dynamic performance analysis of two phase bipolar permanent magnet hybrid stepper motor under no load, rated load & overload conditions along with modelling Leadscrew. The model implemented using Matlab/Simulink tool and the results analyse operating conditions for the stepper motor. The angular & linear displacement of Leadscrew are controlled by the actuator. The performance characteristics of lead screw are good with theoretical aspects.

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09. Implementation of a 4T DRAM element for faster digital system applications.

Vamsi. J* and B. Rambabu

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This paper deals with analysis of average power consumption of dram cell designs for the nanometer scale memories. These DRAMs are used in many modern processors’ internal memory. The major contributor of power in dram is the off state leakage current. Improving the power efficiency of a dram cell is critical for the improvement in average power consumption of the overall system. 3T dram cell, 4T dram cells are designed by using TANNER EDA tool and their average power consumption are compared. Average power consumption, write access time, read access time and retention time of 4T, 3T DRAM cell are simulated and compared on 32 nm technology.

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10. Spatial and Temporal Distribution of Echinoderms in the Intertidal Waters of Massawa.

Prabhu. H. V., Lakshmipathi M.T., Kidane Teum, Michael Angesom and A. T. Ramachandra Naik

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In this paper distribution patterns of echinoderms, sediment textural analysis and physical parameters were dealt in three study sites, Gurgussum, Hirgigo and Tiwalet at the lower intertidal and upper subtidal waters for three months (February, March and April, 2012). Echinoderms distribution and abundance (no/m2) varies from site to site during sampling periods. The three sites also differ in species composition. The highest total density of Oreasteridae (4/m2) was recorded in Tiwalet and it was nil for the same group in Gurgussum and Hirgigo. The most common groups that were seen in Gurgussum are Ophicomidae (107/m2) and Echinomertridae (87/m2) and completely absent in Hirgigo and Tiwalet. The highest in diversity of echinoderms was Tiwalet consisting of four families (i.e. Oreasteridae, Ophiuroidae, Scutellidae and Holothuriidae). However, Hirgigo was completely devoid of any of these groups. Both water temperature and salinity were recorded in all three sites for the three months. It was observed that there was negligible temporal and spatial variation with respect to the two physical parameters. Textural analysis of sediment (sand, silt and clay) showed that sand was dominant fraction in Hirgigo than Tiwalet, while silt is comparatively more in Tiwalet than in Hirgigo. The clay fraction was distributed uniformly in very low percentage in both the sites. But, the site Gurgussum is entirely a hard substratum. In general, echinoderms showed negative correlation with sand and silt whereas positive correlation with clay.

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