The cheapest 02 sensors that I know of are around $50 each, and have a shelf life of 1-2 years. Average price for a decent sensor is closer to $90. And digital solid state O2 sensors go for $400+.
*Edit*: google dive gear express O2 sensors to see these.
I use them for technical scuba diving. In particular with a rebreather, which is capable of mixing oxygen with other gases such as nitrogen and helium. And as the gas is recirculated CO2 is scrubbed away.
CO2 sensors are also available for rebreathers but are not always reliable (same for O2 sensors, so a minimum of 3 are used). The human body is actually quite sensitive to CO2, and it determines our breathing rate. So there are ways to know if you're likely being exposed to elevated CO2 levels by being aware of your breathing rate, paranoia, etc.
There is no management pressure. The article mentions that the artist took it upon himself to start making the signs. So I'm under the impression he does so within his free time.
I think experience plays a role. From my own experience; what I considered high demand 10 years ago is now low demand. Such as resolving a production incident at 10am.
In my past I would switch jobs every couple years. Not due to the stress, but because I was alarmed at how the intensity of work was decreasing at a company. I equated that with slow professional growth.
Now I'm finding several opportunities for growth, but doing so with a calm mindset. Several of my colleagues don't seem calm at all. Yet the majority of us have more control over burnout and "work chaos" than we are lead to believe.
It's a fairly common problem across several makes of cars. Replaced my ignition switch once because of this, and since then have used a separate clip for my house and work keys.
Intention is relevant. What if I was mentally ill and mistaken your backdoor for my own? Or it was was the only feasible escape route from a murderer that was in pursuit of me? Of course this doesn't apply directly to the OP, because this house analogy doesn't hold water. BUT, intent is very relevant when it comes to law.
I'm close to launching a memory trainer for remembering Names and Faces. It uses a spaced repetition algorithm based on Super Memo 2 (Anki does as well, but I'm not sure how far it has evolved from its SM2 roots): http://www.supermemo.com/english/ol/sm2.htm
I recently spent about 20 minutes setting up c3 (http://c3js.org/) for a commercial product I'm developing. Great library, but its footprint is fairly hefty. Looking forward to giving this a try, if it is just as quick to implement.
I just negotiated 4 weeks. Wasn't too difficult, you just have to ask. The funny thing is... I'm likely to pass on the job opportunity, while I stay with my French girlfriend in Paris, building and testing product ideas for a few months =)
Just sounds like it was a bad deal for you all around, not all start-ups are out to "sucker" employees. If you are making a disgracefully low salary, you should of been asking for sizable percentage of equity. And you really should have been insanely excited to work there, and not "slaving" away. I've been fortunate enough to work for some great start-ups. One paid me about 20% lower than market, but a couple years later I was able make 10x off my stock options. At another, I was able to cash out on some of my equity within a year, while making above market. Even if my options ended up being worth nothing, it was a very good decision for me. As an employee, the wealth of experience I gained from working at start-ups has actually doubled my market value within a very short time period.
I really appreciate this post. I'm going through a very similar experience myself. Was at a startup, which was recently acquired by a larger corporation. Since I've previously worked at both small(and fast growing) and large companies in the past, I thought I possibly had the experience to make the new larger team I would be working with more "agile". But taking months to do what I normally accomplish in a week or two definitely is hurting personal morale. I'll try to achieve some daily small wins though=)