Deano’s answer to: “Where are the best sandwiches in San Francisco?”

Couple of decent sandwiches, including a killer burger, to be had at Absinthe.

Order the spicy fried chickpeas while you wait. No regrets.

Bonus – pretty dead weekdays until pre-dinner, but open for lunch.

398 Hayes Street – absinthe.com

This answer originally appeared on Quora: Where are the best sandwiches in San Francisco?

Deano’s answer to: “How are IP addresses mapped to location?”

At the top of the Internet addressing food chain, the Internet Assigned Numbers Authority (IANA) keeps track of IP addresses assigned across the globe, and meted out through the various Regional Internet Registries (RIRs).

(Photo courtesy Cisco Systems)

Internet Service Providers (ISPs) are the ones who assign IP addresses to a given customer, in a given place.

For smaller ISPs, their total service area is very geo-specific to a given city/county, which means that all of their IP address pool, purchased and assigned from an upstream “backbone provider” (also an ISP in most cases), will also be specific to that location/area.

Larger ISPs, which are more likely to “own their own backbone”, purchase their IP address space from one or more RIRs or National Internet Registries (NIRs) and could centrally manage their entire IP address space from a single location… But they too choose to sub-divide their address pool into smaller, localized service areas. This serves several purposes:

  • It enables the ISP techs to associate issues with an IP address to a physical service map in case an on-site tech need be assigned,
  • distributes the number of points of failure, and works in concert with their Disaster Recovery and Redundancy plans to ensure outages are localized as much as possible, and
  • it allows the ISP to easily absorb smaller, more local ISPs through acquisition in a smoother manner (making these customers part of a new – if redundant – local service area, rather than adding them to some larger base of users, and confusing them with existing service plans/infrastructure.

IP address geo-mapping companies simply take the information on file with ISPs, NIRs, RIRs, and the IANA; they then create mappings between IP addresses and country/state/city/neighborhood/node locations.

This information used to be highly erratic and outdated, especially once one went “below country level”. These days, however, everyone along the IP assignment chain understands the value in having accurate IP maps in place, even down the the individual node level (at least, this is true in developed countries) – and as such, this information tends to be updated exclusively electronically, from the on-site technician on up the chain.

As a result, you’re now easier to track, service, and yes, even prosecute based on your IP address alone. Thank heavens for the neighbor’s unprotected WiFi!

Answer originally appeared on Quora: How are IP addresses mapped to location?

Deano’s answer to: “Is visiting Japan safe?”

A quick look at one of several radiation/disaster effect maps of Japan shows that the key areas to worry about are all North/Northeast of Tokyo. A wedding South of Tokyo would likely source the majority of its foodstuffs and other supplies from Southern-side sources, and of course the stigma of using foods and components from the affected Fukushima region will likely ensure that it is the case.

Overall, visiting Japan is safe as ever, perhaps in some ways more expensive, and even now still a bit harder to get from point A to B than it used to be, depending on where you’re going. Outside Tokyo, especially to the South, things should be fairly “pre-tsunami” normal… But depending on the date of the wedding itself, the monsoon season, or the near-tropical summer clime might aggravate your experience a bit, or even cause direct safety issues (flooding, heat exhaustion, etc).

Long story short: if you can go, go. It’ll be safe, and you’ll be in one of the most amazing countries to visit as a tourist, for a once in a lifetime event with friends. What could be better?

This answer originally appeared on Quora: Is visiting Japan safe?

Deano’s answer to: “Where can I have carbon dating done, and how much does it cost?”

There are numerous companies on the Internet that will do carbon dating (and/or various other related dating methods) upon request and payment of a fee, including:

For simple radiocarbon dating of common household objects, costs start above $200 per sample, and vary based on turnaround time, material, dating methods, etc.

Sample sizes can be as little as one milligram of material, though you should check with the testing service for guidelines based on your specific test subject.

Where can I have carbon dating done, and how much does it cost?

Deano’s answer to: “What diet produces the least feces?”

To me this is two different questions – which produces the least feces, and which is most absorbed.

There are various real-life situations in which reducing fecal output is a necessity. In those situations, a diet that induces extreme constipation will, in the most literal sense, "produce the least feces", for a while, at least (potentially days up to a week or more). Banana Fried Rice, anyone?

The latter case, diets in which foods are most absorbed, are really much more likely to be "diets in which most of your food is water"… Things like watermelon, or celery (remove the strings first). Though there are some standouts in the "real foods" category – rare red meat, eggs, and goat's milk are all highly nutritive and add little to your "southbound mass". Raw, as opposed to cooked corn is also said to be highly digestible, though I refuse to believe it based on local outputs during the season. Certain starches, like potatoes (peeled), also have some potential to approach a high absorption ratio, though a lot of it depends on the means of preparation. Oh yes, and blending just about anything down to liquid form will help, you know, a LOT (though really you're just trading the door for the window, so to speak).

I'm hesitant to work up anything approaching a full diet plan, though careful study of the Atkins and South Beach diets should get you about 2/3s of the way there… Then just work to balance what they see as the "gainers" with those foods that are hard to absorb. And, you know, don't do it!

There's a great reason your body wants to push waste through you on a regular basis, and when gamed for long periods, colo-rectal health issues may arise. I'm not a doctor(*), but with the exception of avoiding embarrassment during an imminent anal porn shoot, there are very few – if any – good reasons to use fecal reduction as a goal in one's diet.

What diet produces the least feces?