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Posts
Pointers to Start Off Your Research Journey.
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Working on research is both challenging & interesting. Some find it really stimulating to work on these less explored novel areas to develop something unique which is more fascinating compared to conventional monotonous work. Here I would like to share some of my thoughts and experiences related to research which could provide some pointers to your early research career. (This article by no means provide guidance on higher educational aspect of Research which is beyond the level of my expertise.)
Selecting the Right Co-Founders for your Startup Venture.
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You might have a brilliant startup idea, or you may still be brainstorming for the next big product / service which you envision to build. Although how cool your idea is and how competent you are, in order to make your idea a reality you need to have a perfect team to support you along this tedious journey.
You must unlearn what you have learned!!!
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When you are solving a particular problem your knowledge or expertise plays a vital role. Problems are usually delegated towards experts in the respective domains. The experience & knowledge is key in most of these situations.
How to self improve towards living a good life. Summary & Review of The Subtle Art Of Not Giving A F$ck
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We all want to be Successful, Happy, Rich and lead a good life. It is no easy task in this immensely complex world where we try different approaches to achieve our goals. There may be different approaches to tackle this question of how to live a good life.
Enjoy the present moment by doing what you love..
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Most of us in life follow the status quo, where we get in to a university and go for the highest paid job and get stuck in the never ending loop. If you are doing something you love as your job, you wont feel any frustration. But on the contrary a majority are stuck in job’s which they hate, or somehow the job does not make them happy…
A Summary of Black Box Thinking…The Surprising Truth To Be Successful
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We all yearn to be successful. Despite the difference in the end goal which defines success for each and everyone of us, there are some simple basics which we must adhere to. You might be a Doctor, an Athlete, a Businessman…., but the concepts explained as Black Box Thinking by Matthew Syed would be really helpful for you to shape and guide your self towards success. This article would be focussing on summarizing some of the key elements presented within this valuable book.
The Art of Managing All Kinds of Relationships… Summary of How To Win Friends & Influence People.
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People are the greatest asset for any company, and the relationships that we form are of great importance. However, there are many obstacles in developing good bonds with people, and it is a different art itself. Dale Carnegie’s How to Win Friends & Influence People is a great read for anyone of you, irrespective of your occupation, age, demography. The book is a great summary analyzing the core of human nature, and how we should shape our lives to make good friends and develop great relationships.
Simple Tips on How the Rich Master the Art of Money making. Summary of Rich Dad Poor Dad
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All of us have different occupations, where earning money for a better living is one of our ultimate goals. We are qualified in our respective fields and job roles. However when it come to being rich and successful, unfortunately some miss out and the others flourish. The main reason for this is your Financial Literacy.
Summary of “Zero to One” ,Important Notes on Startups
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Peter Thiel is a popular figure when it comes to Startups. He started is startup journey Co Founding PayPal which was eventually sold to eBay. Afterwards he has founded a number of companies including Palantir Technologies, a big data company. He was the first outside investor for Facebook. This book Zero to One is based on the course he conducted on startups at Stanford University which contains the notes taken by Blake Masters.
Summary of “The Lean Startup” by Eric Ries. An important read to all young startups…
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Every passionate entrepreneur who is pursuing his / her dream startup will greatly benefit by reading The Lean Startup by Eric Ries, as it encompasses many vital aspects that we should be aware of to be successful. The statistics suggest that many startups fail. They do so due to small errors made in thinking, planning and execution. Thus its would be greatly beneficial to read and learn from the experts, and have some understanding on their experiences which would help you in your journey as an entrepreneur.
The Story of Olivescript…
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We have been receiving many messages from our viewers asking what exactly Olivescript is and what we actually do. There has been some confusion since we have been working on multiple domain. In order to provide you a better understanding lets go back few years..
Brainstorming for your next Big Startup Idea??
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Every Entrepreneur starts by thinking, about the next revolutionary startup idea he or she is going to pursue. If you are lucky you will get that unique idea spontaneously. It will be like a sudden spark in your brain leading to something really unique and innovative. The idea might also come to you through your experience in a certain field, where you observe a need / business idea, which you could capitalize on to build up your startup.
Confused about critical decisions about your future ? Try this Method!
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Decisions. Decisions are tough to make when there are lot at stake. It might be about your career, which job to accept?, which stream to pursue your studies or another important life decision. You may be presented with numerous paths, with different levels of risk, benefits and opportunities, where you need to decide with the limited information you possess about the dynamic unpredictable future. Yes, its hard.
What you should think before planning to work for a startup ?
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Selecting the correct job is really important as ultimately you would be dedicating a significant potion of your life to that particular company or startup. Working 5 days a week 8-9 hours each day is a tedious task. And if you do the math you will understand that the time left for your family and yourself is pretty minimal. In that case you should select a job where you would enjoy. If not you would be miserable a significant portion of your life!
Flexible Strategies.
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True artists of strategy, will design flexible strategies to converge towards their goals in the most unexpected and beautiful routes.The delightful feeling of freeness is hard to come by if you are a person with great rigidity or inflexibility. You can always choose to Be Solid as a Rock or flow freely like water… But to feel the bliss of freeness, you should follow something I like to reference as a !exible strategy towards life.
Measure of Success
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When you have an inspired audience with applause and standing ovation does that make you successful? If you are the best student with all the glorified academic and other achievements are you successful? Does being a wealthy entrepreneur make you truly successful?
Memories at Rotaract…
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The lovely memories at Rotaract Mora cannot be summarized to a single sheet, or a couple of paragraphs, when it truly comprises of a number of chapters in my Book of Life…
Be Solid as a Rock or Flow Freely like Water
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We are taught to be strong in life, to be strong as a rock or to standup like a mountain in tough situations. So that we would be immovable during times of stress, pain and agony. Standing strong in such situation will ultimately result in you having the better of the tough tight situation you are put in. But we never talk of the reverse possibility. What if you loose, what if you shatter into pieces like a rock!!..
Legend, Legacy, wait for it….. Legendary!!!!
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We are all fascinated by the stories of Legends, their success stories, the motivation that they bring in, the image they have created. We start looking at them in a new eye, some start worshiping them…. There would always be legends in what ever the field we talk we about. You just need to stand up from the rest of your competitors. In essence it is also another competition where the strongest, the most successful crowned as the Legend. Thus to be a legend you should just be different, unique and successful than the rest. Anyone can at least try to be a Legend right? In life always there is always much more we fail to see.
Failures in the past, worries of the future…
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When you look back in life have you felt how stupid you was ? the blunders you wish that you never made. Its quite common we all do make mistakes, but if we are unable to accept it we run into multiple issues. The controversial decisions you made in the past may seem a disaster or idiotic now but at that moment it might have not felt so. You might have thought it through and took a decision which may seem a mistake now but we cannot blame the past us. Its easy to analyze something which has already happened but its not easy to take a decision with limited information or facts. So its not intelligent of you to blame yourself for decisions you have made some time back…..
See the Good in people or the Real in people ?
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Someone once told me that we should try to see the good in people. True, its how the strong people look at the world. In a positive manner always giving people chances. We are never complete or perfect. We all have our own strengths and weaknesses. We go through good times we go through bad times. But no matter how hard you try some people will only see the negativity or the bad in you.
fear of failing!!
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The goals we set ourself, the effort and hard work we put in can all be undone by fear & guilt. We set ourself goals and work towards it but at times we are afraid to set ourself higher goals. We are afraid to reach too high with the fear of falling. Sometimes this fear restricts us from dreaming and pursuing dreams which might well be the next great invention. Doing something which has never been done needs courage and as well as you need to overcome fear. So its quite evident that fear is a crucial limiting factor of success.
The Artificial Bubble
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The world is a busy place filled with different people not only based on their color, caste or creed but also regarding their attitudes and behavior. It’s a real complex aspect to identify these behavioral aspects of the society. In such a situation it is an interesting to investigate the driving aspects of these behavioral patterns. The Darwinian view of life can be identifies as the survival of the fittest. Life evolved sequentially and only the fittest survived. The species who were able to embrace change and thus the life evolved. I do not wish to brag on the scientific facts of this view but rather relate it to the modern day society where those who possess wealth and power are regarded as the fittest. In such a scenario it would be quite interesting to identify the behavior of the society relating to these factors.
The Basic Overview of the PPG Technology
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The term PPG could be a bit of a new term for some of us, which stands for photoplethysmography. In most simple terms it can be identified as a light based technology which aims to identify the blood flow or the blood volume change in the human vascular system. Through detecting this variation, we could obtain PPG signals which can be identified as a form of a bio – signal generated within the human body. Normally the PPG signals are obtained from areas of the human body such as the fingertips, the earlobe or the toes where a concentration of blood vessels could be identified.
keep it simple
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Think how complex we are, our lives, we have thousands of things to do lectures to attend, work at the office, social commitments and the list just goes on. Well guess we have become more and more complex with evolution, we don’t just full fill our basic needs as the people in the stone age. Instead we have thousands of other needs. We adding more and more as we evolve social media, fashion needs, technological needs etc. We are evolving towards a complex race but would the most intelligent species be complex or simple.
portfolio
Clardia - Prediction of Diabetes Using Non Invasive Photoplethysmography (PPG) Measurements & Physiological Characteristics.
Photoplethysmography (PPG) can be identified as a non invasive, inexpensive, optic technique which measures the blood volume changes in blood vessels through which oxygen saturation, blood pressure, cardiac output could be measured. In recent researches it has been identified that PPG is a promising technique towards early screening of diseases as the PPG waveform possess significant information embedded within.
Flisma - A Wearable Device to Predict Injuries Due to Throwing
The modern sports arena in comparison to early days have become intensely competitive in nature, which has enhanced the focused on integrating technology towards sports enhancement. The amalgamation of technology with sports could be mainly identified in the areas of sports performance enhancement & sports injury prevention. This project focuses on using existing technologies and concepts to develop a wearable system which could be used for early injury prediction of athletes.
Clardia - A Comprehensive Family Health Assistant
Clardia is a Comprehensive Family Health Assistant which can extract health parameters such as the Weight, Body Fat, Heart Rate, Blood Oxygen Levels, Temperature and the PPG Signal of the user. Each family member is just required to stand on top of the Clardia device for 20 seconds. The obtained parameters are thus analyzed to identify diseases symptoms in advance and identify the possibility of potential diseases.
Analyzing Skewed Distributions
We use different data analyzing techniques to extract meaningful information. These techniques could vary from statistical methods, machine learning methods etc. In some cases we assume the normal distribution of data but in reality the data we obtain may not possess these ideal characteristics that we assume. In such cases some sought of a transformation is required to convert the real data to a normal distribution so that we could carry out the analysis. The practical distributions could be in the forms such as Right skewed, Left skewed , or with a couple of peaks.This article is mainly focussing on skewed distributions, and methods to convert them to a normal distribution.
Gym Tracker – An IoT weight scale to record the weight of Gym User’s
Gym Tracker, as the name suggests is a device capable of recording the weight of the users in order to identify the weight changes based on the requirements of the user. The system is able to identify the user via the RFID in the Gym Membership card and thus record the value of the particular user and communicate through wifi to record the data in the cloud server. The user is able to track the movement of his weight through the iWeight application developed.
Rampage – Not another Conventional Line Following Robot
The task was set to design an Analog Line Following Robot without the use of any Micro controllers. This was a quite straight forward task which requires the use of a closed loop feedback from line sensors (usually a combination of a LED/LDR), which is used by the Controller which includes a comparator. But me and my team thought of a different method to achieve the required task by thinking of a new design.
publications
Identifying the Optimum Region of the Human Sole to Extract the PPG Signal for Pulse Rate Estimation
Published in Proceedings of the 9th International Conference on Signal Processing Systems, 2017
Photoplethysmography (PPG) can be identified as a non invasive technique which measures the blood volume changes in the blood vessels, through which key health indicators could be identified and used for abnormality detection. PPG has been integrated in numerous modern applications. This research is conducted in order to evaluate the possibility of applying PPG to the human sole and identifying the optimum regions of measurement. The research calculates the normalized cross correlation between the PPG extracted from the finger and different regions of the sole, and develops an algorithm for Pulse Rate estimation.
Recommended citation: Hettiarachchi, Chirath, Buddhishan Manamperi, and Dilshan Uthpala. "Identifying the Optimum Region of the Human Sole to Extract the PPG Signal for Pulse Rate Estimation." Proceedings of the 9th International Conference on Signal Processing Systems. ACM, 2017. http://chirathyh.github.io/files/paper1.pdf
A Machine Learning Approach to Predict Diabetes Using Short Recorded Photoplethysmography & Physiological Characteristics.
Published in 17th Conference on Artificial Intelligence in Medicine (AIME) - Poland 2019, 2019
Diabetes is a global epidemic, which leads to severe complications such as heart disease, limb amputations and blindness, mainly occurring due to the inability of early detection. Photoplethysmography (PPG) signals have been used as a non-invasive approach to predict dia- betes. However, current methods use long, continuous signals collected in a clinical setting. This study focuses on predicting Type 2 Diabetes from short (~2.1s) PPG signals extracted from smart devices, and readily available physiological data such as age, gender, weight and height. As this kind of PPG signals can be easily extracted using mobile phones or smart wearable technology, the user can get an initial prediction without entering a medical facility. Through the analysis of morphological features related to the PPG waveform and its derivatives, we identify features related to Type 2 Diabetes and establish the feasibility of predicting Type 2 Diabetes from short PPG signals. We cross validated several classification models based on the selected set of features to predict Type 2 Diabetes, where Linear Discriminant Analysis (LDA) achieved the highest area under the ROC curve of 79%. The successful practical implementation of the proposed system would enable people to screen themselves conveniently using their smart devices to identify the potential risk of Type 2 Diabetes and thus avoid austere complications of late detection.
Recommended citation: Hettiarachchi, Chirath, and Charith Chitraranjan. "A Machine Learning Approach to Predict Diabetes Using Short Recorded Photoplethysmography and Physiological Characteristics." Conference on Artificial Intelligence in Medicine in Europe. Springer, Cham, 2019. http://chirathyh.github.io/files/AIME_2019_paper_89.pdf
A Wearable System to Analyze the Human Arm for Predicting Injuries Due to Throwing
Published in 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) - Berlin 2019, 2019
There is limited understanding on factors that contribute to throwing related injuries that frequently occur in sports such as Baseball, Cricket and Javelin throwing. This preliminary study focuses on the development of a real time wearable system focusing on extracting key parameters related to potential upper arm injuries associated with the throwing action in the game of Cricket. A wearable system is developed to analyze Electromyography (EMG) signals for detecting muscle activity and Inertial Measurement Unit (IMU) data for monitoring the arm motion. The extracted parameters are then used for analysis, focusing on detecting established indicators of potential injuries. Additionally, an unsupervised learning algorithm is developed towards identifying novel relationships indicating potential injuries.
Recommended citation: Hettiarachchi, Chirath, et al. "A Wearable System to Analyze the Human Arm for Predicting Injuries Due to Throwing." 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2019. http://chirathyh.github.io/files/EMBC19_0212_FI.pdf
talks
On-policy Reinforcement Learning Algorithm Concepts
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Table of Contents
Eigen Vectors/Values/Frequencies/Modes
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The glucose regulation task is formulated as a continuous control problem.
On-policy State Distributions & Optimisation Objectives for Episodic / Continuing (Average-Reward, Discounting Settings) Tasks
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This article summarises concepts related to on-policy Reinforcement Learning (RL) algorithms. Specifically the focus is on looking at the optimisation objectives, on-policy distributions and compare between different RL task settings.
teaching
Teaching experience 1
Undergraduate course, University 1, Department, 2014
This is a description of a teaching experience. You can use markdown like any other post.
Teaching experience 2
Workshop, University 1, Department, 2015
This is a description of a teaching experience. You can use markdown like any other post.