Health
-

Background: Some workplaces provide snacks for their employees, and employees frequently find it very difficult to avoid constantly snacking on these delicious treats. The Issue: It is hard to avoid snacking, especially when snacks are free. Proposal: The solution is simple (Figure 1): just wear a shirt that says “I’ll give you $20 if you…
-

Background: In some climbing gyms, there are introductory climbing walls for children where the climbable hand holds are shaped like a recognizable object (Figure 1), instead of a random-looking piece of stone. Using the 26-letter (capital letters only) English alphabet, we can assemble a reasonably sized climbing wall wall without using any duplicate letters. The…
-

The Issue: The human body is relatively fragile and generally does not like collisions with pointy things. Unfortunately, in the modern world, there are a huge variety of dangerous objects with sharp edges, metal spikes, thorns, and more (Figure 1)! Although it is theoretically easily avoidable by paying attention, a person must be on guard…
-

Background: In the United States, the phrases “castle doctrine” and “home defense” most often refer to the idea of using guns to defend oneself from potential home invaders (specifically, by shooting them). However, despite the castle-related terminology, what is strangely lacking is any actual home defense (in the sense of medieval fortifications). See Figure 1…
-

Background: When arranging furniture in a house, people generally tend to just put tall furniture (bookshelves, wardrobes, etc…) against a wall and just sort of hope that none of it falls over. Normally, this is a reasonable assumption, except during rare situations such as earthquakes or small children climbing up a bookshelf like a ladder.…
-
Background: Small children are generally not known for strict adherence to hygiene or to biosafety protocols, and may have a not-fully-calibrated immune system. As a result, when dozens of children are co-mingled at a daycare, it’s highly likely that they’ll be constantly bringing diseases back to their own homes, causing their parents / siblings /…
-

Background: When disaster strikes, it’s useful to have a set of easily-accessible emergency supplies that can be brought by a person fleeing danger. This is the concept of a “go” bag: a backpack full of common supplies that a person might need if they had to temporarily abandon their home due to a natural disaster.…
-

Background: People frequently leave notes around the house, either as reminders to themselves or as reminders to family members or roommates. For example: “Remember to push the fridge door shut, or it stays open!” or “Remember to lock the top lock when you leave the house!“ The Issue: These reminders are all fine and good,…
-

Background: One classic cause of civilization-ending apocalypse in science fiction is AI-initiated nuclear war, as variously depicted in Wargames (1983), Terminator (1984), Battlestar Galactica (2003), and other media. The Issue: Generally, humans don’t fare well in a post-nuclear-apocalypse setting, and would like to avoid it when possible. Unfortunately, security around nuclear launches may be inadequate (Figure 1): it…
-

Background: Frequently, residential houses have areas that are dangerous in some way: perhaps a railing that is a little wobbly (but will probably stay attached), a garage door that is missing the “don’t crush a person” electric eye sensor, or a bookshelf with a three-hundred-pound vase that is perilously perched on the top shelf. The…
