SRM University-AP celebrated the 75th Independence Anniversary of the nation in all its pomp and glory. As India has surpassed 75 years of independence and is propelling towards a glorious future of many more accomplishments, the nation was painted with the colours of courage, peace, and prosperity as part of the Har Ghar Tiranga campaign launched by the Prime Minister. In keeping with the vibe and vigour of freedom celebrations resonating all over the nation, the SRMAP NSS unit and the Department of Student Affairs visited houses in the nearby villages to promote the campaign.
The celebrations started off with the hoisting of the National Flag ceremony by the honourable Vice-Chancellor Prof VS Rao. He conveyed his Independence Day greetings to all and paid homage to all the brave warriors of our nation including Mahatma Gandhi, Subash Chandra Bose, Chandra Shekhar Azad, and all other known and unknown heroes of the land who lived, fought, and died for the nation.
Prof V S Rao also highlighted the role of Science & Technology in taking the country forward along the paths of sustainable and inclusive development. ”From green revolution and nuclear technology to our space missions, entrepreneurial evolution, and contribution to covid abatement, Science & Technology has effectively spread to every possible sector”, he remarked. He urged the student community to mould themselves up to be active collaborators in the process of nation-making. He also accentuated that SRM-AP is replete with opportunities for students to navigate their skills in all possible ways.
Students staged a colourful array of cultural programmes including songs and dance performances expressing their patriotic spirits. Prof VS Rao felicitated students who have brought laurels to the institute for their outstanding skills in various curricular and extra-curricular activities. Certificates were distributed to the participants of the Blood Donation camp. And the celebration came to a closure with the prize distribution ceremony to the winners of various games and sports events conducted on campus as part of the Azadi ka Amrit Mahotsav celebrations.
Tummala Bhuvitha, Computer Science Engineering student at SRM University-AP showed exceptional talent in the 22nd state-level rifle shooting competition organised at Hyderabad Central University under the aegis of the National Rifle Association of India. She won the first position and 3 gold medals in the 10m air rifle shooting competitions held in senior, junior and youth categories, respectively.
More than 100 shooters from Andhra Pradesh took part in the competition held from the 4th to 7th of this month. Participating in the competition from SRM AP, Bhuvitha stunned the organisers by winning three gold medals in a row. Bhuvitha had won gold medals twice in the past in state and national level rifle shooting competitions held in different places. According to her father, Bhuvitha learned shooting techniques from Subrahmanyeshwar Rao, the coach at the Indian Academy of Shooting Sports in Vijayawada.
“I grew passionate about rifle shooting because it is an individual sport that requires so much concentration and focus”, says Ms Bhuvitha while sharing the joy of her success. University President Dr P Satyanarayanan, Vice-Chancellor Prof V S Rao and Registrar Dr R Premkumar praised Bhuvitha for winning three gold medals consecutively in state-level competitions.
The Department of Physics is glad to announce that Assistant Professor Dr Soumyajyoti Biswas and his PhD scholar Ms Diksha have published their article “Prediction of imminent failure using supervised learning in a fiber bundle model” in the Q1 journal, Physical Review E. Prediction of breakdown in disordered solids under external loading is a question of paramount importance to the stability of buildings and bridges to earthquakes. The researchers used numerical simulations of a model of disordered solids and recorded the time series of the avalanche sizes and energy bursts. They propose that a systematic analysis of these time series using supervised machine learning can predict the time of failure. Interestingly, the most important feature for such predictions turns out to be the measures of how unequal the avalanche sizes are.
Applying external stress on disordered materials beyond their mechanical limits results in their fracture. Hence it is important to know the limit or how the material behaves as it approaches the limit and the factors that influence it. The failure properties of materials are very distinct from other properties such as elasticity, in the sense that their predictions are not always straightforward. Predicting the failure in driven disordered systems is a long-standing problem in physics, engineering, and earth sciences. So, for understanding the fracture process and predicting the failure properties of the materials, a mathematical model (fibre bundle model) has been used.
They introduced the disorder to the system and generated the time series of avalanche size and energy bursts. Some inequality indices i.e., Hirsch index (h), Gini index (g) and recently introduced Kolkata index (k) were measured for the response statistics of the driven systems. These social inequalities are usually represented by the Lorenz function L(p), where p fraction of the population (events) possesses L(p) fraction of total wealth (avalanche mass) when the population (avalanche events) are arranged in the ascending order of their wealth (size). Based on these time series, the machine learning algorithm can predict the prior failure time of the system. So, they have used a supervised machine learning algorithm (with the above-mentioned indices as some of the features) to predict the failure time of the model. They observed that these inequality measures play an important role in making predictions.
Prediction of imminent fracture has its implications in a wide range of disciplines, including stability of mechanical structures (buildings, aircraft, bridges etc.), extraction of oil (fracking) to the largest scale of mechanical failure i.e., earthquakes. Here a supervised machine learning approach is used to make such predictions in numerical models. However, with the important features identified here for such predictions, such research can carry out similar predictions for experimental data. A follow-up of this work is being carried out by Ms Diksha with a group in Spain regarding the experimental verification. Their future research plans include applications of the methods developed here to be applied to real-life physical structures for their stability analysis and predictions of impending catastrophes.
Illustration 1: A schematic diagram of the Lorenz function L(p)is shown, where L(p) denotes the cumulative fraction of the avalanche mass contained in the smallest p fraction of avalanches. If all avalanches were equal in size, this would be a diagonal straight line, called the equality line. The area between the equality line and the Lorenz curve (shaded area),therefore, is a measure of the inequality in the avalanche sizes. Two quantitative measures of such inequality are extracted from here, the ratio of the shaded area and that under the equality line (Gini index, g) and the crossing point of the opposite diagonal – from (0,1) to (1,0), shown in dashed line,and the Lorenz curve, giving the Kolkata index, k. 1 − k fraction of avalanches contain k fraction of the cumulative avalanche mass.
The Department of Electronics and Communication Engineering is glad to announce that Assistant Professor Dr Sunil Chinnadurai and his research scholar Mr Shaik Rajak have published a paper titled “Energy Efficient MIMO-NOMA aided IoT Network in B5G Communications” in the Q1 journal Computer Networks having an Impact Factor of 5.5. With an intent to accelerate the development of future intelligence wireless systems, the paper proposes an energy-efficient massive multiple-input-multiple-output (MIMO)- non-orthogonal multiple access (NOMA) aided internet of things (IoT) network to support the massive number of distributed users and IoT devices with seamless data transfer and connectivity.
Abstract of the research
Massive MIMO has been identified as a suitable technology to implement the energy efficient IoT network beyond 5G (B5G) communications due to its distinct characteristics with a large number of antennas. However, providing fast data transfer and maintaining hyperconnectivity between the IoT devices in B5G communications will bring the challenge of energy deficiency. Hence, they considered a massive MIMO-NOMA aided IoT network considering imperfect channel state information and practical power consumption at the transmitter. The far users of the base stations are selected to investigate the power consumption and quality of service. Then, they calculated the power consumption which is a non-convex function and non-deterministic polynomial problem. To solve the above problem, fractional programming properties are applied which converted the polynomial problem into the difference of convex function. And then they employed the successive convex approximation technique to represent the non-convex to convex function. Effective iterative-based branches and the reduced bound process are utilized to solve the problem. Numerical results observed that their implemented approach surpasses previous standard algorithms on the basis of convergence, energy efficiency, and user fairness.
Explanation of the research in layman’s terms
- A cost-effective (i.e., energy efficient) maximization problem for the multiple cells NOMA heterogeneous network scheme is explored when meeting the transmission power and data necessity of far users. The singular value uncertainty model (SVUM) is deliberated to add the errors with the transmitted signal. Since it’s a non-convex problem and challenging to solve, they used the properties of fractional programming to convert it into its corresponding mathematical terms. ITS needs higher data rate and seamless connectivity to operate with maximum speed and safety.
- SCA methods are then applied to change the optimisation problem. After that, an effective iterative scheme is employed based on Branch and Reduced Bound (BRB) that resolves the energy-efficient SVUM problem and satisfies the convergence criteria.
- The proposed iterative BRB method enhances user fairness and decreases inter-tier interference (ITI). IRS has been recognised as the key enabling technology to provide the data required by the ITS with less power consumption.
- Energy efficiency achieved by the proposed BRB method is examined with the help of numerical results and found that the proposed algorithm provides better efficacy than the majorisation minimisation (MM) method and the well-known OMA scheme.
Practical implementations of the research
- To provide high data rates to wireless sensors and the internet of things (IoT), future communication systems can ultimately be advanced by implementing NOMA, small cell, and heterogeneous networks (HetNets) along with MIMO.
- An energy-efficient massive MIMO-NOMA aided IoT network to support the massive number of distributed users and IoT devices with seamless data transfer and connectivity between them in B5G communications.
Future research plans
- To explore the energy efficiency of AI-driven IoT networks for applications such as intelligent health care and intelligent vehicular communications.
- MIMO-NOMA with IRS elements to reduce power consumption and improve the connectivity between the users.