Effect of metakaolin and alccofine in high strength concrete

High strength concrete is defined as concrete with characteristic cube strength above 40 MPa. The applications of high strength concrete are bridges, aqueducts, dams, high rise buildings etc. This work involves the comparative study of various mineral admixtures such as alccofine and metakaolin on high strength concrete. Alccofine is a new generation micro fine concrete material which is beneficial with respect to workability as well as strength. The desirable properties of Metakaolin make it mostly preferred additives in high strength concrete. In this study, cement is partially replaced with alccofine, metakaolin at 5, 10 and15%. The mechanical properties like compressive strength, flexural strength and split tensile strength are evaluated and compared. The strength properties are maximum for the concrete mix with alccofine

A Study of Reconnection Poleward of the Cusp: Cluster and Polar

Asymmetries in plasma density and the presence of a guide field significantly alter the structure of the ion diffusion region (IDR) in symmetric, collisionless reconnection. These features have been shown by numerical simulations under moderate density asymmetries (~10), and theoretical analyses. However, very few studies have addressed these issues with in-situ observations, particularly at high magnetic latitudes. By the structure of the IDR we refer to features such as the non-colocation of the X-line and stagnation line, the distortion of the Hall magnetic and electric fields, outflow speed, outflow density etc. We have compiled a collection of Cluster crossings of the high-latitude magnetopause poleward of the cusp under northward interplanetary magnetic field in the years 2001−2008. We identified 18 events that fulfilled the criteria that was used as plausible evidence for an IDR crossing. A wide range of guide fields (6 to 74%) and very high density asymmetries (over three orders of magnitude) were present in this event list. The total DC electric field ranged from 10 mV/m-72 mV/m. We compared theoretical predictions for ion outflow speed and density against measured values for events with least magnetic shear and found good agreement. Peak values of both measured quantities agreed better than the average values. The separation between the X and S-lines were measured for two events. The separation was in the order of ~2 ion inertial lengths. We presented a detailed analysis of a current sheet crossing hallmarked by a density asymmetry of 2 orders of magnitude (~140) [Muzamil et al., 2014, JGR]. This event was measured by the Polar spacecraft, also at high latitudes poleward of the cusp. Data agreed well with simulation results, especially the observation of density cavities together with isolated electric fields in the normal direction at both separatrices. This has not been observed in previous observational studies. Effect of the guide field on both sides of the X-line was examined using two events with jet reversals and similar guide fields. A sunward-tailward asymmetry in the Hall magnetic field structure was observed due to the guide field in the two outflow regions. The Hall field was weakened and changed polarity in the vicinity of the X-line due to an electron velocity shear layer. Using three other crossings with high guide fields, we measured a 40-60% enhancement in the Hall magnetic field showing consistency with simulations. We then presented a case study of large episodic magnetic field depressions in the magnetosheath boundary layer region near the magnetic separatrix. We identified specific characteristics and compared them to possible generating mechanisms. The most plausible one was kinetic Alfvén waves. Thus, we have provided observational evidence for the structure of the IDR in poleward of the cusp under several different asymmetric conditions and guide fields

Effect of plant growth regulators on the quality of bast fibres in Abelmoschus esculentus (Linn.) Moench.

Abelmoschus esculentus (Linn) Moench. vernacularly variously called okra, bhindi or ladies’ fingers, is a vegetable crop and a source of soft fibre which has not been commercially exploited. The use of its fibre as an admixture with jute and also in paper and cardboard manufacture is already documented. The present investigation highlights the effect of plant growth regulators like gibberelic acid (GA) and naphthalene acetic acid (NAA) on the quality of bast fibres in A. esculentus. The fibre quality was best in GA100 + NAA 50 g mL–1 treatment. Fibre macerate studies showed an increase in fibre length and the slenderness ratio was also high. The Runkel ratio for the above treated fibre was between 1 and 2 rendering it suitable for the textile industry. Proximate analysis of retted fibres revealed a lower moisture and ash content and an increase in wax content. Fourier transform infra-red (FTIR) spectroscopy analysis registered a high crystallinity index. The physico- -mechanical properties showed considerable improvement of fibre quality. Considering the above criteria, GA100 + NAA 50 g mL–1 treatment brought about advantageous changes for improving the quality of fibres. This study is significant in promoting the exploitation of a non-conventional bast fibre source for use in textile industry

Assessment of Neuropharmacological Profile of Ethanolic Extract of Lawsonia Inermis Flowers

On preliminary basis neuropharmacological profile of ethanolic extract of flowers of Lawsonia inermis was carried out. For assessing the activity of flowers on central nervous system locomotor activity using actophotometer, muscle relaxant activity using rotarod apparatus, pentobarbital-induced hypnosis and anticonvulsant activity by maximal electroshock test was performed.  Ethanolic extract of flowers of Lawsonia inermis decreased the motor activity by 48.63 % and showed 49.03% noteworthy muscle relaxation along with 127.73% potentiation of pentobarbital-induced sleeping time and 66.67% decreased the duration of tonic hind leg extension of seizures activity.  The results conclude that the extract of flowers of Lawsonia inermis has significant central nervous system depressant activity. Further investigations are, however, necessary to explore mechanism(s) of action involved in these pharmacological activities

An Overview Study on Awareness of Global Warming Among the Graduate Teacher Trainees

Nowadays global warming is considered as a burning problem and it is being a challenge to the entire world and its scientific society. Global warming is a worldwide environmental problem by which there is an abnormal increase to the level of temperature, particularly in a natural environment. Global warming is not only affecting the nature, but it affects the life and homes of millions of people. The changes of global warming is visible from the highest mountains to deep in the oceans and it extinguished different parts of the earth and it's also creates rich bio-diversity. To identify the level of awareness global warming and to enhance the same among future secondary school teachers, the Authors decided to conduct the present research study of awareness on global warming among graduate Teacher trainees of college of education. Further, the study may also help the student teachers of secondary schools to create awareness on global warming among students studying in secondary schools in future. Keywords: global warming, climatic Change, green house effect, environmental refugees, and 3R

Efficient Data Gathering and Aggregation for Multiple Applications in Wireless Sensor Networks

Data aggregation in wireless sensor networks refers to acquiring the sensed data from the sensors to the gateway node. It reduces the amount of power consumed during data transmission between the sensor nodes. Generally homomorphic encryptions have been applied to conceal communication during aggregation. Since enciphered data can be aggregated algebraically without decryption. Here adversaries are able to forge aggregated results by compromising them. However, these schemes are not satisfying multi-application environments, provide insecure transmission and do not provide secure counting for unauthorized aggregation attacks. In this paper, we propose a new concealed data aggregation scheme extended from homomorphic privacy encryption system. The proposed scheme designed for a multi-application environment, mitigates the impact of compromising attacks in single application environments and also it can avoid the damage from unauthorized aggregations by the privacy homomorphic encryption scheme.Comment: 14 pages, 4 figure

Incidental gynaecological malignancy in women who underwent hysterectomy for utero-vaginal prolapse: a 3-year institutional case study

Background: Pelvic organ prolapse is common is almost 50% of women over the age of 50years. The objective of the present study was to estimate the number of incidental gynaecological malignancies in women who underwent hysterectomy for utero-vaginal prolapse.Methods: 354 women who presented with asymptomatic utero-vaginal prolapse were included in this study. Women who were symptomatic with bleeding per vaginum, lower abdominal pain or excessive white discharge and preoperative screening tests such as VIA/VILI, colposcopy, Pap smear and radio-imaging showing any gynaecological lesions were excluded from this study.Results: Histopathological examination of the hysterectomy specimen showed premalignant lesion in 13 cases accounting to 3.7% (11 cases of CIN I, 1 case of CIN II, 1 case of CIN III) and malignant lesions in 5cases accounting for 1.4% (4 cases of endometrial adenocarcinoma and 1 case of cervical squamous cell carcinoma).Conclusions: Asymptomatic women with utero-vaginal prolapse may have pre-existing premalignant and malignant lesions. Therefore, all women undergoing hysterectomy should be preoperatively screened with transvaginal ultrasound, endometrial biopsy and pap smear to rule out malignancy, as the management differs for patients with co-existing gynecological malignancies

Fabrication and Characterization of Electrospun Silver Nanofibers with Unmatched Porosity

Herein we describe the fabrication and characterization of free standing silver nanofibers with very high porosity using electrospun polymer nanofibers as template. Silver (Ag) metal was deposited on these porous nanofibers using thermal evaporator. The polymer nanofibers (template) and silver nanofibers were characterized using scanning electron microscopy, XRD and cyclic voltammetry. The Ag nanofibers showed high electrical conductivity

By using Internet of Things Analysis of Waste Monitoring System

Metropolitan territories in urban areas are confronting poor strategy for waste administration. Since there is quick increment of urban populace unhygienic conditions are winning. To maintain a strategic distance from this condition and to enhance the personal satisfaction powerful waste administration is utilized. In proposed framework, squander container is checked with the sensors and GSM framework. An android application is utilized to screen data with respect to squander independent of area. By this squanders are expelled effectively