Veena Hegde - Academia.edu (original) (raw)

Papers by Veena Hegde

Traitement du Signal, 2022

The Electromagnetic (EM) waves are impinging on the base station from all the directions, Equally... more The Electromagnetic (EM) waves are impinging on the base station from all the directions, Equally Spaced Uniform Linear Antenna Array (ESULA) are used to process these incoming EM waves to Detect and Estimate the directions of the mobile transmitters. After the process of Detection and Estimation, Electronic Beamforming is used to provide the narrow sharper beam towards the detected user. This Detection, Estimation and Beamforming plays a key role in variety of use cases like Radar, Wireless Communication and Sonar based systems. Smart Antenna Systems are implemented using two strategies namely Direction of Arrival (DoA) and Beamforming (BF). Direction of Arrival is a mechanism of Detecting and Estimating the directions of the mobile transmitters. Beamforming on the other hand is a process of transmission of the EM waves towards the source in a specific direction and providing the Spectral Nulls to other Interfering users. To increase the user capacity and to enhance the user experi...

2021 International Conference on Electrical, Computer and Energy Technologies (ICECET), 2021

2015 International Conference on Advances in Computing, Communications and Informatics (ICACCI), 2015

The aim of this paper is to develop a hardware Random Number Generator (RNG) by using an optical ... more The aim of this paper is to develop a hardware Random Number Generator (RNG) by using an optical Theremin. Theremin is a noncontact electronic musical instrument based on the principle of heterodyne. It has two antennas to control volume and pitch of the sound which form a pair of resonant RLC oscillators. In the presented system, optical sensors (Photodiodes) have been used to produce the notes of the Theremin by varying the intensity of incident light beam. Two photodiodes have been used for this purpose to control gain and pitch of the sound notes. These sound waves are then sampled to give amplitude levels which forms the desired Random Number Sequence and is unique for every tune produced by the Theremin. Since random numbers are at the core of all encryption algorithms and network security such as SSH/SSL, generating high-entropy random numbers is the prime need of the hour.

2015 International Conference on Smart Technologies and Management for Computing, Communication, Controls, Energy and Materials (ICSTM), 2015

This project presents an engineering low cost solution to a contemporary issue of speech recognit... more This project presents an engineering low cost solution to a contemporary issue of speech recognition in a headphone. The “Smart Headphone” has been brought out as a prototype design in which two principles of Active Noise Cancellation (ANC) have been achieved using a Digital Signal Processor (TMS320C5416). The system will detect the surrounding environment in real time and process the significant information to the user and thereby reducing the risk of accidents. It can warn users of incoming traffic (e.g. fire engines and ambulances) nearby and surrounding danger. It can be controlled by the user's voice commands; such as increasing or decreasing volume with the help of an interface controlled by a microcontroller (MSP430F2013) and the voice recognition module VR 3.1. The multifunction intelligent headphone will also notify the user if someone is trying to talk to them. The system presented here has profound implications for future studies of Wearable Computing and would help the society in a great way reducing the amount of traffic accidents suffered by people due to wearing headphones while driving or walking unaware of the surroundings.

The Journal of Indian Prosthodontic Society, 2009

... Author: Prabhu Nayana ; Kumar Sandeep ; D′souza Marriete ; Hegde Veena. Abstract: Edentulousn... more ... Author: Prabhu Nayana ; Kumar Sandeep ; D′souza Marriete ; Hegde Veena. Abstract: Edentulousness falls in a special category among the various conditions of dental origin. Tooth loss is the dental equivalent of mortality. ...

The Journal of Indian Prosthodontic Society, 2007

The development of sophisticated surgical techniques and procedures in the past decade has greatl... more The development of sophisticated surgical techniques and procedures in the past decade has greatly enhanced the rehabilitation of congenital cleft palate patients. However, some of these patients may present oral and / or systemic factors contraindicating surgical intervention. In addition, since total elimination of surgical failure has not yet become a reality, there exists a patient population for whom rehabilitation must be approached with the help of a prosthodontist. The function of a prosthodontist is to restore the basic vital functions of mastication, deglutition and speech production. To accomplish this, the prosthodontist is most concerned with the preservation of residual teeth, the health of the periodontium, the physiology of residual soft palate musculature and the activity of the anatomic structures identified with the palatopharyngeal sphincters. This article provides an overview of palatopharyngeal incompetence.

2015 International Conference on Computing and Network Communications (CoCoNet), 2015

More than 10% of the population in developing countries suffers from blindness. Those impaired ca... more More than 10% of the population in developing countries suffers from blindness. Those impaired can be suffering from birth or eventually might have lost their sight. The `Foresight', a novel technology brought out in this paper provides a new, multiple sensor facility with a distance and speed prediction algorithm to aid the visually impaired. A five independent Ultrasonic sensors with a distance and speed detection of the obstacles will help the blind person to navigate the path as he moves. The averaging algorithm proposed will make spurious dynamic changes in the obstacles to be more measurable and help to develop a robust system. The technology proposed in developing the aid for visually impaired has been transferred on to a set of customized microcontroller target boards in the form of a wearable device. The product has been tested on visually impaired children in blind school and the ease of movement of the blind while wearing the proposed device and the other existing devices have been compared.

2017 5th IEEE International Conference on MOOCs, Innovation and Technology in Education (MITE)

Project based learning (PBL) in Engineering is an alternate for traditional pedagogy in which the... more Project based learning (PBL) in Engineering is an alternate for traditional pedagogy in which the learner will gain knowledge and skills by developing a solution for an authentic problem in a specified duration. Since it can be framed as continuous engaging activity, the number of topics of the course syllabi gets delivered in the process. A case study approach for a course titled ‘Digital Signal Processing (DSP)’ is presented, as an example for PBL. The problem statement chosen for the PBL implementation is to illustrate a novel concept of Smart Headphones using Active Noise Cancellation and speech recognition. The PBL project is designed to address the contemporary issue of speech recognition in multimedia headphone to make it smart at a low cost. The prototype design based on principles of Active Noise Cancellation (ANC) is achieved using a processor, TMS320C5416. The sub tasks of this project are correlated to different topics of the course of DSP syllabus. The sub task implementation, evaluation and mapping help to attain the outcomes of the course by means of PBL. The hands on experiments carried out with the DSP processor in implementing the proposed project in stages provide the better and ease of understanding of the course. An evaluation of stage wise implementation as compared to the corresponding evaluation modules of traditional DSP course delivery has been presented.

Innovations in Computer Science and Engineering

This paper presents classification of an image as shirt, T-shirt or trouser for a specific object... more This paper presents classification of an image as shirt, T-shirt or trouser for a specific objective by training a convolutional neural network (CNN). The classifier implemented is a significant component of the assistive instrument developed to help people with dementia become more independent with dressing. The work presented in this paper brings out tuning the hyperparameters of the CNN used in the system. A dataset was prepared for the three classes of clothing by capturing the images, pre-processing and labelling the images. Data augmentation was performed on a subset of the original dataset to reduce the overfitting problem. A standard architecture was chosen with convolution, max-pooling and dropout filters which help in dimension reduction, thus enabling faster training of the model. Upon evaluation of the model on the testing dataset, an accuracy of 93.31% was achieved. In order to describe the performance of the classification model, a confusion matrix was plotted.

2017 14th IEEE India Council International Conference (INDICON), 2017

A person on an average spends nearly a year on the process of folding clothes. In this paper, we ... more A person on an average spends nearly a year on the process of folding clothes. In this paper, we sought to reduce the human effort and time involved in the process by automating it. Any process of folding garments essentially requires the clothes to be brought to a standard or recognizable form to identify corners, collars or stitches. This is the innate difficulty in mechanizing the process. Our paper aims to transform a heap of clothes to a folded stack by means of simple mechanisms and electronic control systems. The work is divided into three sections based on the objectives to be attained at the end of each. The first stage involves isolating a single cloth from a heap. The next stage focuses on unfurling the cloth to a recognizable form and orienting it in a way that is compatible with the final stage. The last section of the project folds the clothes. In addition to these three main functions, automating the process also requires the clothes to be transferred between these st...

2016 IEEE Region 10 Humanitarian Technology Conference (R10-HTC)

Lakes are important part of urban ecosystem. They are small aquatic bodies, but perform significa... more Lakes are important part of urban ecosystem. They are small aquatic bodies, but perform significant environmental, social and economic functions. Their contribution ranges from being a source of drinking water, recharging groundwater, acting as sponges to control flooding, supporting biodiversity and providing livelihoods. Many economic sectors such as agriculture, domestic applications consider lakes as easily available source of water for their day to day needs. Lakes may be man-made or natural, fresh water or brackish; but they play a very vital role in maintaining environmental sustainability particularly in urban environments. In today's urbanization, especially in contexts when the cities are facing the challenges of enhanced traffic and pollution, lakes and freshwater bodies are the hopes for restoring the ecosystem. At present, in India, lakes and wetlands are in extremely bad shape and are suffering from varying degrees of environmental degradation. Despite knowing their environmental, social and economic significance, city planners have given least importance to protect them and have even destroyed these water bodies. Due to unplanned industrialization, much of the landscape around the lakes in urban area and their surroundings has been covered by impervious surfaces. As a result, instead of rainwater, it is the sewage and effluents that are filling up urban water bodies. Once the known sponges of urban area, today urban lakes have turned into hazards needing utmost attention, that get choked even with low rainfall and overflow into the blocked canals during high rainfall. In recent times, during the rainy season, the lakes and fresh water bodies have become reasons for causing floods in the city. The cities are witnessing eventual disappearance of these sponges that has exacerbated floods and sharpened the pain of droughts. In an attempt to provide a solution to this complex problem, our paper presents a model and testing mechanism towards bringing the awareness about the lake water health monitoring. Our system consists of sensors including temperature, Total Dissolved Solids (TDS) and pH sensor to calculate the water quality index and create the mathematical model to predict the variation of the parameters in the future. The system will help the stakeholders and public to be aware of the condition of the lakes and take corrective actions to prevent further degradation.

2017 5th IEEE International Conference on MOOCs, Innovation and Technology in Education (MITE), 2017

Assessment of Learning Outcomes are important for successful implementation of Outcome Based Educ... more Assessment of Learning Outcomes are important for successful implementation of Outcome Based Education (OBE). The learning outcomes on a long run are reflected in Program Educational Objectives (PEOs), by the graduates of a program, spread in different knowledge spheres. This paper represents a case study implementation for PEO evaluation. An approach for evaluating PEO as an indirect means is being proposed in this case study. The method emphasizes on evaluation and attainment of PEOs. This is accomplished through alumni and employer surveys. These surveys are carried out more systematically by an online process to collect feedback from various stakeholders once in a year. The model proposed here is for obtaining the response for survey questionnaire at the institutional level through alumni association in coordination with placement cell, Industry Institution Interaction cell (IIIC). Further the survey includes inputs from professional bodies as well. Based on the quantitative and...

As engineers, we can analyze and mathematically relate the behaviors present in all life sciences... more As engineers, we can analyze and mathematically relate the behaviors present in all life sciences. For example, a brain can be modelled as a neural network, or a heart can be modelled as a closed loop control system. Similarly, entities from the world of arboriculture or the plant kingdom as a whole can be modelled and fitted into mathematical models. With the increased use of high speed computers in recent years, process models have a high scope for getting transformed to their digital twins. The performance analysis of such digital twins can be carried out using various techniques and the future behaviour of these systems can be predicted. The non-linear and stochastic behaviour of inputs for these models can be weighed based on the history of their occurrences and the priority level can be assigned to obtain the performance evaluations. This concept has been applied here in this work, to predict the characteristics of trees in terms of their lifespan and strength. The methods of ...

Cities are changing because of movement of people out from the centre, increased suburbanization ... more Cities are changing because of movement of people out from the centre, increased suburbanization and desire for spacious residences and job opportunities. This change has created an impact on journey-to-work by choosing a public mode of transport system to convenient to travel, affordable travel by car. There is a demand for parking spaces as a part of space management. It is found that lack of knowledge of motorists regarding valid parking spaces cause increased traffic congestion. As we know, awareness of any system is necessary for efficient utilization of that system, the knowledge of infrastructure availability of parking avenues is first step towards facilitating parking space. The paper presents a solution to the driver, which is capable of analyzing the availability of vacant slots in a given parking space based on digital image processing techniques combined with an Internet of Things (IoT) technology. Further analytics of the solution are used to create interfaces that can...

Journal of University of Shanghai for Science and Technology

Information about the health can be obtained by measuring various physiological parameters such a... more Information about the health can be obtained by measuring various physiological parameters such as Heart Rate, Heart Rate Variability (HRV), Nerve conduction, brain activity, blood oxygen saturation level etc. The useful information resulted from the systematic analysis of these physical parameters are helpful for clinicians to make better decisions. HRV reflects the state of the Autonomic Nervous System (ANS) defined as the variance in the time between successive heartbeats expressed in milliseconds. The various factors that affects HRV are diet, nutrition, age, alcohol, gender, cardiac rhythm, sleep habits, genetics etc. The analysis of HRV is helpful in stress assessment and also in identifying the diseases at the early stage. This paper discusses the fundamentals of HRV, analysis of HRV, and the role of HRV in stress detection.

2016 IEEE Annual India Conference (INDICON), 2016

This paper presents a low cost eye based Human Computer Interface (HCI) developed for amputees an... more This paper presents a low cost eye based Human Computer Interface (HCI) developed for amputees and paralyzed persons. The system is a computer interface that provides the functionality of an input device like mouse based on eye actions such as eye blink, eye-gaze and gaze control. For initialization, the subject just holds his/her head still for a few seconds: using involuntary blinks that would naturally occur during this time, the system both locates the user's eye pair as well as forms online templates of the open and shut eyes of the specific user, valid for the rest of that session. The located eyes are tracked in real time using template matching and histogram back projection. Reasonable amount of head motion, carried out at reasonable speeds, are automatically detected and compensated. Automatic re-initialization of the system occurs if the user goes out of frame or during excessive rapid head movement. When the eyes are detected as more than 70% open, the iris tracker module is triggered. In order to detect the iris, the eye image is subjected to image conditioning to eliminate the eyelashes and eyebrow. The iris is detected on the basis of colour and shape, and the Hough transform is used on the region to determine its centre and radius. Iris detection is continuously repeated whenever the eye is open, so that it is continuously tracked. Later on, continuous gaze does the mouse clicking action replacing the mouse of the computer with this HCI.

Validity of Crown to Root Ratio As a Prognostic Tool in Clinical Practice, Dec 29, 2014

Journal of Engineering Education Transformations, 2015