
Venture sprints
Explore an opportunity, challenge the assumptions, and work out what’s worth building next.
Founder, author
I’m Rishal. I build, write, and help people make sense of technology. Fifteen years in, I’m still learning.
From Brain food · Jun 2023
A blank canvas is vessel for expressive artwork, insightful knowledge, innovative solutions, and anything that our minds can imagine
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Second edition · An illustrated guide
A practical, visual guide to the algorithms that power search, machine learning, neural networks, LLMs, and generative AI.
Explore the bookAt Viszen, we help clients explore new ventures, make technology decisions, and build the skills to put AI to work.
Work with Viszen

Explore an opportunity, challenge the assumptions, and work out what’s worth building next.

Assess where your technology is today and find a direction that supports your business goals.

Help engineering teams and product leaders apply agentic AI thoughtfully in their everyday work.
Products we've created for people who fly, train, and build businesses.

A flight companion for recreational pilots, with live instruments, weather, route planning, and 3D replays. Stay connected with fellow pilots and let friends and family follow your flights.

Build a routine around your goals, log your lifts, and know what to aim for next. Track your progress over time and build the consistency that makes a difference.

Find prices that make sense in each country. Compare local purchasing power, account for your costs and margins, and bring your app, subscription, or game within reach of more customers.


Make solo training more varied with spoken cues for strikes and movement. Tailor your rounds for boxing, kickboxing, Muay Thai, or Capoeira, and keep moving to your own music.

Keynotes, talks, and workshops on AI, design, product strategy, and leadership through practical, visual, and relatable experiences

By learning about disparate concepts in the world, one can build an intuition and deeper understanding of the interconnectivity of everything; and hopefully use that more-informed view to make a positive difference.

Facilitating meetings and workshops can be daunting and somewhat stressful. Moreover, attendees are often quiet, disengaged, and feel like the session is a waste of their time <cue joke about useless meetings>.

Like other machine learning algorithms, a reinforcement learning model needs to be trained before it can be used. The training phase centers on exploring the environment and receiving feedback, given specific actions performed in specific circumstances or states.

Reinforcement learning (RL) is an area of machine learning inspired by behavioral psychology. The concept of reinforcement learning is based on cumulative rewards or penalties for the actions that are taken by an agent in a dynamic environment.

Artificial neural networks (ANNs) are versatile and can be designed to address different problems. Specific architectural styles are useful for solving certain problems. Think of the architecture as being the fundamental configuration of the network.

To explore the workings of multi-node ANNs, consider an example dataset related to car collisions. Suppose that we have data from several cars at the moment that an unforeseen object enters the path of their movement.