Sema Vatansever
Making the reasoning behind everyday decisions visible
Sourced Guides · Academy · Atlases · Free Tools
This site publishes sourced guides, step-by-step learning programmes, structured atlas records and free browser-based tools on technology, movement, nutrition, everyday life and the sky.
Every page states the method it relies on, its limits and the date it was last reviewed. Calculators return ranges rather than single figures, and nothing you type is sent to a server.
Popular starting points
- 6academy programmes
- 52lessons with knowledge checks
- 12modules
- 14trust policies
Five sections
Each section opens with introductory material, deepens through an academy programme and returns to practice through atlas records and tools.
Technology
From hardware and software concepts to account security, backups and verifying what an AI tool tells you.
Sport and Fitness
A safe start to exercise, reading programme language (sets, repetitions, RPE), cardio intensity and recovery.
Nutrition
Calories and energy balance, macronutrients, portions and label reading. No diet plans are issued.
Smart Living
Sleep, screen time, the workspace and habits — small sustainable steps instead of sweeping promises.
Sky, Mind and Culture
The astronomy behind Moon phases and Mercury retrograde, and the cognitive mechanisms that make horoscopes feel personal.
Sema Academy
Six programmes, each divided into modules and single-sitting lessons. Every lesson ends with an eight-question knowledge check and every programme with a twelve-question assessment. No certificate is issued and results stay in your browser.
Technology Literacy Academy
The Technology Literacy Academy is a three-module programme that helps you manage the devices, files and accounts you use every day with confidence. The aim is not to tur
AkademiStarting Exercise Safely Academy
Two things stop most people who want to start exercising: not knowing where to begin, and the fear of getting hurt. This programme takes both seriously, teaching the step
AkademiNutrition Literacy Academy
The Nutrition Literacy Academy is a learning programme that builds your ability to evaluate what you hear about nutrition, read food labels, and interpret portions correc
AkademiCalories and Energy Balance Academy
The Calories and Energy Balance Academy is a short learning programme that calmly explains what a calorie is, how the body spends energy, and how BMR and TDEE estimates a
AkademiScientific Reasoning and the Sky Academy
The sky is one of humanity's oldest fascinations, home at once to science and to the search for meaning. This programme aims to build your ability to weigh claims about t
AkademiSustainable Everyday Life Academy
The Sustainable Everyday Life Academy is a two-module programme that teaches you to observe your day as it really is and to design small, lasting behaviour changes. The g
Why you can rely on this site
Sources are shown
Informational content draws on official institutions, academic work and recognised professional sources. Product marketing copy does not count as a source.
The method is stated
Every calculator states its formula, assumptions and margin of error, and returns a range rather than a single figure.
Health claims are limited
Exercise, nutrition and everyday-life content is general information; it is not diagnosis, treatment or personal advice.
Your data stays with you
Tool results, favourites and learning history are stored only in your own browser and never sent to a server.
Health and safety note
The exercise, nutrition, sleep and everyday-life content on this site is general information. Calculator results are estimates and do not replace medical assessment. Anyone with pain, an injury, a chronic condition, an eating-disorder history, pregnancy or special dietary needs should seek support from the relevant professionals.