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Entropy changes in the clustering of galaxies in an expanding universe

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Natural Science 2011年第1期3卷 65-68页

作者： Naseer Iqbal Mohammad Shafi Khan tabasum masood 不详

In the present work the approach-thermody- namics and statistical mechanics of gravitating systems is applied to study the entropy change in gravitational clustering of galaxies in an expanding universe. We derive analytically the expressions for gravitational entropy in terms of temperature T and average density n of the particles (galaxies) in the given phase space cell. It is found that during the initial stage of clustering of galaxies, the entropy decreases and finally seems to be increasing when the system attains virial equilibrium. The entropy changes are studied for different range of measuring correlation parameter b. We attempt to provide a clearer account of this phenomena. The entropy results for a system consisting of extended mass (non-point mass) particles show a similar behaviour with that of point mass particles clustering gravitationally in an expanding universe.

关键词： Gravitational Clustering Thermodynamics Entropy Cosmology

Study of impact materials of akhnoor meteor crater in Jammu and Kashmir (India)

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Natural Science 2011年第6期3卷 426-429页

作者： Naseer Iqbal Ajaz Ahmad tabasum masood M. N Vahia Department of Physics University of Kashmir Srinagar India

A sample of Akhnoor meteor crater, which fell on 2nd January 2009 in Jammu District, Jammu & Kashmir, India, has been analyzed for ele-mental composition by Spectroscopic tech-niques. Concentrations of 17 major, minor and trace elements were determined. The authentic-ity of the meteorite sample was established by comparing its composition with those of stan-dard meteorites/chondrite. The classification of the sample has been made by comparing the abundances and concentration ratios of ele-ments with other known meteorites.

关键词： Meteor Impact Creator Stony Meteorite

An Empirical Approach to Get the Vitality of a Genotype to Water Stress Tolerance in Yield and Yield Contributing Traits

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American Journal of Plant Sciences 2013年第5期4卷 999-1003页

作者： Ijaz Rasool Noorka Saba tabasum Department of Plant Breeding and Genetics University College of Agriculture University of Sargodha Sargodha Pakistan Molecular and Cytogenetics Lab University of Leicester Leicester UK.

Conventional methods of plant breeding and agronomic practices remained a successful tool to maintain the pace of food production for centuries but due to changing climatic conditions and the challenges of 21st century like population growth, pollution, declining biodiversity and food security have shaken the previous policies. This situation compelled the agriculturist towards the judicious management of natural resources to combat the poverty, disasters and increased food demands. The present study was initiated to check wheat varieties in two water provision conditions. The results revealed that environmental stresses played negative role by minimizing the yield and yield contributing traits. However the severity of water stress was depleted by some promising genotypes by showing minimum hazard effects and by having capability to contribute to conserving biodiversity, ensuring sustainability, combating food insecurity and increasing economic benefits. The minimum effect of moisture stress on grain yield was shown by genotypes C-518 (12.97%) while the genotype Shakar, Pari-73 and Uqab-2000 showed maximum decline percentage. The global warming and population explosion will further induce commodity shortage and law and order situation in the world. The prevailing International tension can be cooled down by the provision of marshal aids by the developed countries to the effected or threatened countries.

关键词： Climate Disaster Water Stress Poverty Sustainable Wheat

Water Stress Tolerance, Its Relationship to Stem Reserve Mobilization and Potence Ratio in Spring Wheat

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American Journal of Plant Sciences 2013年第2期4卷 231-237页

作者： Ijaz Rasool Noorka Amarah Batool Sultan AlSultan Saba tabasum Amjed Ali Qassim University College of Agriculture Al Qassim KSA University College of Agriculture University of Sargodha Sargodha Pakistan

Twelve wheat (Triticum aestivum L.) cultivars and their sixteen direct and reciprocal crosses were evaluated for heterosis, heterobeltiosis and potence ratio to determine the potential of wheat genotypes under contrasting water regimes. The highest positive heterosis and heterobeltiosis was observed in cross combination Sehr-06 × Pasban-90 under both water regimes for the trait stem reserve mobilization (SRM). While in trait 1000-grain weight the cross-combination Pari-73 × C-273 (Normal irrigation) and Fsd-08 × SA-42 (water stress) showed highest heterosis and Pari-73 × C-273(Normal irrigation) and Fsd-08 × Chenab-70(water stress) showed highest value of heterobeltiosis. The potence ratio in both traits expressed overdominance estimates exhibiting the presence of transgressive segregants, may be exploited for on-ward selection in the bread wheat improvement. The genotypes showing better SRM based 1000-grain weight in the absence of photosynthesis indicates relative water stress tolerance. This procedure paved an indirect way to screen the wheat genotypes to withhold water stress situation and sustain wheat production.

关键词： Stem Reserve Mobilization Direct Reciprocal

An Efficient IIoT-Based Smart Sensor Node for Predictive Maintenance of Induction Motors

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Computer Systems Science & Engineering 2023年第10期47卷 255-272页

作者： Majida Kazmi Maria tabasum Shoaib Arshad Aziz Hashim Raza Khan Saad Ahmed Qazi Faculty of Electrical and Computer Engineering NED University of Engineering and TechnologyKarachi75270Pakistan Neurocomputation Lab National Center of Artificial IntelligenceKarachi75270Pakistan Department of Electrical Engineering PNECNational University of Sciences and Technology(NUST)Karachi75350Pakistan

Predictive maintenance is a vital aspect of the industrial sector,and the use of Industrial Internet of Things(IIoT)sensor nodes is becoming increasingly popular for detecting motor faults and monitoring motor *** integrated approach for acquiring,processing,and wirelessly transmitting a large amount of data in predictive maintenance applications remains a significant *** study presents an IIoT-based sensor node for industrial *** sensor node is designed to acquire vibration data on the radial and axial axes of the motor and utilizes a hybrid approach for efficient data processing via edge and cloud *** initial step of signal processing is performed on the node at the edge,reducing the burden on a centralized cloud for processing data from multiple *** proposed architecture utilizes the lightweight Message Queue Telemetry Transport(MQTT)communication protocol for seamless data transmission from the node to the local and main *** broker’s bridging allows for data backup in case of connection *** proposed sensor node is rigorously tested on a motor testbed in a laboratory setup and an industrial setting in a rice industry for validation,ensuring its performance and accuracy in real-world industrial *** data analysis and results from both testbed and industrial motors were discussed using vibration analysis for identifying *** proposed sensor node is a significant step towards improving the efficiency and reliability of industrial motors through realtime monitoring and early fault detection,ultimately leading to minimized unscheduled downtime and cost savings.

关键词： IIoT sensor node condition monitoring fault classification predictive maintenance MQTT

Chemical Control of Monocot Weeds in Wheat (<i>Triticum aestivum</i>L.)

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American Journal of Plant Sciences 2014年第9期5卷 1272-1276页

作者： Zia Mehmood Muhammad Ashiq Ijaz Rasool Noorka Amjed Ali Saba tabasum Muhammad Shahid Iqbal Ayub Agricultural Research Institute Faisalabad Pakistan Department of Agronomy University College of Agriculture University of Sargodha Sargodha Pakistan Department of Plant Breeding and Genetics University College of Agriculture University of Sargodha Sargodha Pakistan Plant Physiology Section Ayub Agricultural Research Institute Faisalabad Pakistan

Due to similar growth pattern and morphology, monocot weeds offer more severe competition with wheat. A field experiment was conducted to screen herbicides most suitable for the control of monocot weeds in wheat. Seven herbicides viz., Puma super 69EW @ 862.5 g a.i. ha-1, Bristle 69 EW @ 1250 ml, Topik 15WP @ 37.05 g a.i. ha-1, Safener15WP @ 247g, Certain 80WD @ 395.2 g and Tremor 24EC @ 247 ml/ha were used. Weedy check where no weed control was practiced was kept as control. All herbicides were sprayed as post-emergence with second irrigation 38 days after crop sowing. The best weed control was accomplished by Safener 15WP 247 g ha-1 as significantly lower weed counts per m2 (11.0) and higher percent weed control (73.4%) were noted after 21 days of its spray. Wheat growth parameters like plant height, number of tillers per m2, spike length and number of spikelets per spike remained statistically at par among various treatments. Significantly higher number of grains per spike (55.67) and 1000 grain weight (36 g) were noted with Puma Super 69EW @ 1250 ml ha-1 and Certain 80WD 395.2 g ha-1, respectively. Although treatments did not differ significantly with respect to wheat grain and biological yields, yet the highest grain yield (3708.3 kg ha-1) and biological yield (10208.3 kg ha-1) were produced by Puma Super 69EW @ 1250 ml ha-1. Based on better weed control and wheat yield, Safener 15WP @ 395.2 ml ha-1 and Puma Super 69EW @ 1250 ml ha-1 were proved to be better in areas where wheat fields are predominantly infested by monocot weeds. Puma super, Bristle Tremore, Safener and Certain were found effective against Avena fatua and Polypogon monspelliensis, less effective against Phalaris minor and ineffective against Poaannua grass.

关键词： Screening Herbicides Contributing Traits Infestation Yield