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Gelo, Chrysanthou Mylona, 1, Limassol (2026)

22/07/2023

🧠 Understanding our Core Metrics - iAF and iAPF

Gelo sheds light on two core metrics - iAF and iAPF - forming the basis for all subsequent calculations.

🚀 The Roar of the Neuro-Engine

In our lively moments, we experience a wide range of sensations. From everyday routines, effortlessly transitioning between tasks, to deep immersion in focused work, each individual has a unique tendency. By analyzing EEG activity, we use iAF - individual alpha frequency (7 to 13Hz in the Alpha range) as our compass. It reveals personal inclinations towards multitasking (iAF closer to 7-9Hz) or delving into intricate challenges for hours (iAF closer to 11-13Hz).

🚗 Accelerate or Brake - iAPF Signals

During a drive, pressing the gas pedal or applying brakes changes the engine's sound and speed. Similarly, our brain's state is depicted in the iAPF - individual alpha peak frequency. This frequency peak is unique to each individual and varies based on current conditions. Comparing the individual peak (iAPF) to the normal frequency (iAF) helps determine the brain's "freshness/rested state."

💡 Real-World Applications

Anticipating fatigue early on, these markers prompt timely breaks, relaxation, and rejuvenation, enhancing team productivity. Allocating roles and tasks effectively becomes simpler, as individuals with low iAF excel at multitasking (e.g., product managers), while those with high iAF excel at deep focus (e.g., analysts). Those with moderate iAF often make effective managers, bridging communication and diverse tasks.

🔍 API Metrics and Dynamic Tracking

Our API measures iAF and iAPF after each calibration before starting work. Stay tuned for future posts detailing derived metrics for dynamic monitoring. Join the neuro-tech journey with Gelo BCI!

17/07/2023

FPG sensors.
The PRO versions of Neiry headphones and bands have FPG, gyroscope and accelerometer sensors in addition to EEG. While most people are familiar with the latter, the FPG is worth a closer look.
FPG (photoplethysmography) is a method of measuring blood volume in blood vessels using light radiation. FPG is widely used in medical and sports devices such as pulse oximeters, fitness bracelets, smart watches, etc.
The FPG works on the principle of determining tissue density. An emitter illuminates the skin on one side and a photodetector records the reflected and transmitted light through the skin. When the heart contracts, the volume of blood in the vessels increases, and when it relaxes, it decreases. This causes fluctuations in the intensity of the reflected light that can be detected by the FPG sensor. From these fluctuations, the intervals between heartbeats can be determined. The sampling frequency of FPG signal measurement in Neiry devices is 100 Hz.
FPG allows you to determine not only heart rate, but also heart rate variability (HRV).
HRV is natural changes in the intervals between heartbeats (duration of cardiac cycles) of normal sinus rhythm of the heart. HRV reflects the state of the autonomic nervous system, which regulates heart function. HRV can be evaluated by various parameters such as mean, standard deviation, spectral analysis, non-linear methods, etc.
High heart rate variability indicates good adaptation to changing conditions and low risk of heart disease, while low HRV indicates impaired heart rate regulation and increased risk of complications. Also HRV can be related to the emotional state of a person, as emotions affect the activity of the autonomic nervous system. For example, joy and pleasure increase HRV, while anger, fear and other types of stress decrease it.
Thus we get additional methods of measuring the user's state, applicable where EEG is insufficient. Or they can be used in combination for a synergistic effect.

17/07/2023

What is EEG and why do we use it?
🧠 An EEG is a method of examining the electrical activity of the brain using electrodes on the surface of the head. It is a quick and safe way to find out what is going on inside our most complex organ.
EEG can help in the diagnosis and prevention of various conditions such as epilepsy, persistent sleepiness, dementia, stroke and others. EEG can also be used to study cognitive processes such as attention, memory, learning, problem solving and creativity. EEG can provide feedback on the state of the brain and help with training certain states or relaxation. EEG can also serve as the basis for neurocomputer interfaces that allow a computer or robot to be controlled by the power of thought.
🔌 How does EEG work?
The brain is made up of billions of neurons that exchange signals using ions and chemical mediators. When neurons are active, they create electric fields that can be recorded externally. When many neurons work synchronously, we can get the resulting EEG signal and from it understand the parameters of their work.
To measure the EEG, we need to attach electrodes to the head with a special cap or tape. The electrodes are connected to an amplifier and a computer that records and analyzes the signal. The EEG signal has a very low amplitude (microvolts) and is affected by various noises (e.g. from facial muscles or electrical devices). Therefore, it is necessary to use filters, statistical methods and machine learning algorithms to clean and interpret the signal.
EEG signals can be categorized into two types: rhythmic and evoked signals. Rhythmic signals are oscillations of a certain frequency that are associated with different brain states (e.g., alpha rhythm when the eyes are closed). Evoked signals are responses to specific stimuli (e.g., a P300 potential that helps you select a desired object from a series of other objects on a screen flashing at different frequencies). Rhythmic and evoked signals can be used to classify user states or intentions in neurocomputer interfaces.

11/04/2023

This is our Gelo Mind Tracker.

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11/04/2023

There are two forms: headband and headphones.

Which one is better? You decide!

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11/04/2023

By training the power of alpha waves, you can learn to turn anxious thoughts off and reduce stress levels.

Hence, you will learn to automatically keep your body and mind relaxed and direct all your energy to the task at hand.

Mind Tracker allows training your brain how to maintain a high alpha rhythm while you work, study or perform other challenging tasks.

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11/04/2023

Gelo Mind Tracker helps fight stress and retain lengthy focus on complicated tasks to reach any ambitious goals.

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