Slashdot: News for Nerds


Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!



Scientists Find Olfactory "Memory" Passed Between Generations In Mice

belphegore Re:They did not pass "aversion" to their grandkids (118 comments)

Yes, for the initial test group. But two things (quotes from blog not TFP):

1. "startle" is not necessarily aversion

For example, the researchers didn’t do a control experiment where the F0 animals are exposed to the fruity odor without the shock. So it’s unclear whether the “memory” they’re transmitting to their offspring is a fear memory, per se, or rather an increased sensitivity to an odor.

and 2. not for the group where they used IVF to create the offspring to eliminate some possible biases:

To control for these possibilities, the researchers performed an in vitro fertilization (IVF) experiment in which they trained male animals to fear acetophenone and then 10 days later harvested the animals’ sperm. They sent the sperm to another lab across campus where it was used to artificially inseminate female mice. Then the researchers looked at the brains of the offspring. They had larger M71 glomeruli, just as before. (The researchers couldn’t perform behavioral tests on these animals because of laboratory regulations about animal quarantine.)

about 8 months ago

Scientists Find Olfactory "Memory" Passed Between Generations In Mice

belphegore They did not pass "aversion" to their grandkids (118 comments)

The grandkids had enhanced receptors for that particular smell. They specifically did not test for, and point out in the paper that they do not claim that the AVERSION was passed on, only that F1 and F2 had structures in the brain that are enlarged compared to control, and that are associated with the sense of smell for the chemical that was used to prime the F0 generation.

Much better science-savvy writeup by my cousin on the Nat Geo blog:

about 8 months ago

Duke Univ. Device Converts Stray Wireless Energy Into Electricity For Charging

belphegore Re:Too bad (216 comments)

It's not totally missing. Max legal wifi xmit power is 100mW at the source. Conversion at the receiver is ~37% efficient. So if you're directly on top of the xmitter, capturing ALL the (generally omni-radiated) energy, you'd get 37mW of power. USB on newer devices is like ~10W.

And of course if you're not capturing 100% of the signal in all directions, and if you're away from the source (remember friends: inverse square power dropoff), then you'll be lucky to get even a mW.

about 8 months ago

How Your Compiler Can Compromise Application Security

belphegore Meanwhile, THEIR code is sketchy (470 comments)

Checked out their git repo and did a build. They have a couple sketchy-looking warnings in their own code. A reference to an undefined variable; storing a 35-bit value in a 32-bit variable...

lglib.c:6896:7: warning: variable 'res' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
lglib.c:6967:10: note: uninitialized use occurs here
plingeling.c:456:17: warning: signed shift result (0x300000000) requires 35 bits to represent, but 'int' only has 32 bits [-Wshift-overflow]

about 9 months ago

"Slingatron" To Hurl Payloads Into Orbit

belphegore Re:Limited cargo use (438 comments)

Space burial! Now with free pudding!

Sign me up.

about a year ago

"Slingatron" To Hurl Payloads Into Orbit

belphegore Re:Cargo is expensive (438 comments)

Let's take some of the nastiest, most explosive and poisonous stuff we know of, load it into a container, then spin it round and round and round at insane speeds, then when it's pointed in what we hope is roughly the right direction, let go...

What could possibly go wrong?

about a year ago

HTTP 2.0 Will Be a Binary Protocol

belphegore Re:Worth the tradeoff.. (566 comments)

...unless you're on an embedded platform for which you don't have a compiler, and maybe busybox might build in this fancy new binary HTTP client tool in a few decades, but it'll be another few decades after that before manufacturers enable it and ship it.

1 year,12 days

Teenage League of Legends Player Jailed For Months For Facebook Joke

belphegore Grammar nazis (743 comments)

Jailing someone for misplaced comma? If it were a bad use of the apostrophe, I could understand. But a comma?

1 year,24 days

George Albercook Teaches Kids About Space with High-Altitude Balloons (Video)

belphegore Re:Easy to see curvature (21 comments)

You don't need a lot of magnification to see with your eyes the tops, but not the bottoms, of things whose base is beyond the horizon.

about 2 years ago

George Albercook Teaches Kids About Space with High-Altitude Balloons (Video)

belphegore Easy to see curvature (21 comments)

The earth's curvature is very easy to see even down on the surface. It's called "the horizon".

about 2 years ago

AT&T Expects Data-Only Phone Plans Within 2 Years

belphegore Uh.... like the existing iPad plans? (97 comments)

I guess the dude never heard of his own company's iPad plans, which are ALREADY DATA ONLY

more than 2 years ago

Engelbart's Keyboard Available For Touchscreens

belphegore Re:IIRC (160 comments)

The picture at Wikipedia is of the Microwriter, not the Microwriter AgenaA. Try this page:

There's a picture on there under that name which is the device I remember -- the AgendA that is, not the Microwriter below it.

more than 2 years ago

Engelbart's Keyboard Available For Touchscreens

belphegore Re:IIRC (160 comments)

I think the poster below is correct, it's a Microwriter AgendA. The picture at Wikipedia is of some other Microwriter device. This page has a picture of the AgendA:

My friend had one around the same time I had my Psion Organizer II, ~1989 or so in highschool in the UK.

more than 2 years ago

World IPv6 Day: Most-watched Tech Event Since Y2K

belphegore Why only HTTP servers? (243 comments)

$ host -t mx mail is handled by 5 mail is handled by 10 mail is handled by 20 mail is handled by 30 mail is handled by 40
$ host has address$ host -t mx mail is handled by 10 mail is handled by 10 mail is handled by 10 mail is handled by 10 mail is handled by 10 mail is handled by 10 mail is handled by 15 mail is handled by 20
$ host has address
$ ...etc

more than 3 years ago

Ask Slashdot: What To Do With Other People's Email?

belphegore Re:Tell the person (619 comments)

This is exactly what I do. I have 3 people who commonly misuse my gmail address, and all share my name. One is a retired Air Force colonel in Virginia, one is a real estate agent in Texas whose wife uses his email address for her clothing design business a lot, and the most recent is an Australian whose daughter has recently gone off to college and uses her dad's email address for some reason. I enjoy vicariously living part of these 3 folks lives. I have found all 3 of their real email addresses, fairly easily, and I forward their mail to them. Generally this encourages them to be more careful about not mis-entering their email addresses on web forms, etc. and in insisting on the correct spelling when giving their addresses to others, thereby reducing the future burden on me. I think all 3 of them greatly appreciate it when I do forward the mis-directed mail to them, and generally I don't twice get misdirected mail from the same source: they do fix the sender's problems for me. If the 3 of them weren't so geographically spread it might be harder -- but there are almost always clues in the email as to whether the intended recipient is in Texas, Virginia, or Australia -- or whether a teen girl, retired AF colonel, or realtor/clothing designer.

more than 3 years ago

Why Are We Losing Vertical Pixels?

belphegore Re:incorrect (1140 comments)

It can take a 1920x1080 signal and use its scaler to render to its panel. Yes. But can any of those TVs actually properly render the thin vertical lines in a test pattern like this one:
I've not seen one yet that can.
I believe that the "resolution" that they're advertising is the INPUT resolution, not the number of actual pixels on the panel.

more than 3 years ago


belphegore hasn't submitted any stories.


belphegore has no journal entries.

Slashdot Account

Need an Account?

Forgot your password?

Don't worry, we never post anything without your permission.

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>
Create a Slashdot Account