Archive

Posts Tagged ‘atlanta’

EVO 4g : So what is that 4g like? in the ATL

June 15th, 2010 Stephen No comments

Sprint’s marketing strategy behind the EVO was to give it data access to 4g, which it has access to through it’s >50% stake in Clear wireless, that sells WiMax as a general internet access point for people tired of DSL, tired of cable, who want some freedom or some other type of service.

Sprinst Cool 4g Commcercial Shot

Sprinst Cool 4g Commcercial Shot

Sprint and Clear’s WiMax is the only current implementation of a network potentially capable of 4g specs (100mbps target) as AT&T, Verizon, and the world are trying to figure out how to do 4g better with  LongTermEvolution.

WiMax has a few differences:

  • Runs at 2.5ghz instead of 700mhz (basically meaning less penetration, but higher quality)
  • It’s Microwave (so Sprint Nextel already owned a bunch of towers and frequency ranges) :: remember push to talk?
  • Longer Range
  • Mobile switching is difficult (so when you’re driving at <40mph and moving from one tower to another, you’re going to be disconnected.

So far, I’m pretty disappointed with my 4g coverage.

  • First of all, I don’t get any 4g at my house in the suberbs (Roswell) even though I know that plenty of people in this area and north of me have Clear.
  • In the knoll at PiedmontPpark (Piedmont and 12th St) , I barely got a 4g signal.
  • In any building where I can’t see closely out of the window. I don’t get 4g coverage.
  • It can be very spotty. In the office, on the 34th floor, I get 2 bars with the phone to the left of me, I get 1 bar with the phone to the right of me. I get zero bars in front of me closer to my computer.
  • Shopping for houses at 5th and Argonne, I almost got it, but not really (tree cover?)

But the throughput is pretty amazing. We’re talking 3.5 ->4mbps speed to speedtest.net. and 1.5mbps whenever you have 1 bar coming in and out. On the phone, this means that in downtown Roswell, I could watch HQ youtube clips waiting in line at the barber with less load time that my comcast connection.  It means that I can watch videos on Marta, and load web pages as quickly as they would load on my wifi.

Some spots are great:

  • Highway 92 (Roswell, Norcross)
  • Georgia 400 (Exit 8 -> Midtown)
  • Buckhead near Lenox (not in Lenox)
  • Up high in buckhead
  • Midtown on 5th Street / Peachtree
  • Midtown on 15th street / West Peachtree

A final thought here for the physics people; so 2.5ghz takes more cpu to process, but signal travels farther (through air) – also, higher bandwidth means fewer packets (when you’re intense) so which will be more battery efficient? 3g or 4g? Because bettery on a smartphone seems important And when I leave 4g on in standyby, it doesn’t seem to kill the battery that much.

But also, yeah, If I lived in San Francisco where there isn’t any 4g coverage and there might not be for a while, I’m not sure that I’d care for an EVO, because that 4g can be nice, and is obviously a key feature of the phone.

Finally, I’d love if somebody wanted to hack their EVO apart and try to figure out how easy it might be to add a 2.4ghz hdtv or portable phone type antenna to boost the signal.

Categories: Computers, EVO Tags: , , , , ,

Driving on Ice

January 9th, 2010 Stephen No comments

This Thursday in Atlanta it snowed and so there has been ice on the roads Friday and Saturday – which the news seemed to have a lot of fun covering.

This reminds me that I wish every driver out there had to autocross (SCCA $35) before they get their actual license.

Driving in ice is a lot like racing. There I said it. It all has to do with traction: in either situation when your wheels aren’t actually getting traction, you’re best off if you wait for traction to be restored before trying to change input. This means that if you try braking, turning, and accelerating you are just getting farther and farther away from traction.

On ice, or the track:
* Don’t out-brake your tires. Locking up is bad and will likely result in a spin when a locked up wheel does grip.
*Don’t try to steer when you’re sliding. Turning your wheels sideways just means that they are farther away from traction.
*Watch the acceleration. Don’t be sudden on (or off)

A great suggestion that I have is to try out sliding on the ice. If you have a wide flattish street and a patch of ice with no other cars. Try a slow speed version of slamming on your brakes, accelerating hard (I don’t actually suggest turning here.)

That’s it.

I am not responsible for any damages this advice may cause.

I’m at Bar Camp Atl 3

October 24th, 2009 Stephen No comments

Tonight I am camping downtown at the ATDC in the Centergy building of Gatech 5th street after a fun 6 hours listening and learning about various cool subjects.

The night started with barbecue before the opening credits to the cool sponsors like Microsoft, ATDC, TechDrawl, and an insurance co.

I was a little confused at first with the room setup (there were 8 rooms available – but better to be prepared) and scheduling was sort of quick and on the fly.  So on the fly that my seminar got moved to the front when somebody needed a projector later on (on the bright side, I got to see Sherry’s presentation on social media (more to come later.)

Inside a Peltier

Inside a Peltier

The first thing to know about my presentation is that I planned to have maybe 5 minutes to present with a projector and a quick q&a, but instead, I had 30 minutes to present (luckily I undid this by finding the room about 5 minutes late.) My presentation was on Peltier Junctions, thermo couples, and an ideation session into Micro-tech producing a ceramic paint with magnetically align-able junctions.  Unfortunately, I only had two attendees and one was a little on the ADHD side of things. The important thing though is that we were involved in the exchange of ideas; one of my guests expressed a great idea where peltiers could be used: water towers – because the water is chilled (and this takes energy, and the top of the tower is exposed to sunlight – a peltier could insulate and help provide electricity at the same time!

Next, @sherryheyl from concept hub inc showed us her ideas on social media marketing and different revenue models. Some of the more interesting ideas were that “Knowledge is no longer power”, “Knowledge is free” based on the example of Good Will Hunting learning all that he knew for $1.50 in late charges from the local library.  She also talked about the issue of financial advisors not knowing how to use technology, so monetize advisors by training them and certifying them to use your site.

Here you see the blue and black corset with a zipper.

Here you see the blue and black corset with a zipper.

Then I went to the Duct Tape Corset session (how to make duct tape clothing)

which was over-hyped on twitter by the likes of Stephen Fleming (the competing session) and Keith McGregor, but was still interesting with the 3 people who did show up to discuss it, including a man wanting to make a vest. I think that using paper towels or cotton for the foundation for these is a much better idea for breath though (than a trashbag.)

Next, I went to a more casual conversation on micro appliances where THE MICROSOFT HATER (he yelled against the MSFT sponsor to start the night) presented us with three of his more mobile devices – a nokia mini laptop, a psp type device, and the gameboy mini (showing how the loader would load any

rom catridge inserted. These discussions lead to topics concerning screen size, typability, batter life, and I even talked about my netbook. BTW, I got a lot of comments about my mini 10, and a lot of people are impressed by its size and the hd decoder chip. The conversation was really educational, and the guy presenting works with the it at GPC.

The Microsoft Hater passing around his cool mini devices.

The Microsoft Hater passing around his cool mini devices.

Chris, somebody that I’ve met through Ajai and the GT Young Entrepreneurs and SOBreakfasts from Fandomu.com who runs MomoCon (a free anime convention held near gatech) presented on creating more community with your social network. We did sidetrack a little into getting together a “skeptics” group and a lot of the ideas were based on little things that people will save for to spend on at a convention and using local resources, having short inventory items (food/tshirts) and working with similar ideas to co-op or otherwise provide adequate spacing to provide.

It was about 11 now, and I walked in on the “end” of @stephenfleming’s QA session on the energy grid, alternative energy, and solar power on the tail of the  Hydrogen Myth. My question as to whether we really should look at the smart grid technology or more toward independent generation led to an interesting discussion with Michael about the Russian micro nuclear generators that were liquid lead cooled (so automatically contained if overheated) that could power a neighborhood, be plenty safe and maintenance free underground for ~ 20 years in the size of a meeting table. The conversation continued until the 11:30 spot and ventured into how Georgians want Atlanta destroyed in flooding and a history lesson into Milton County (which I contend if it does split off again will only be doomed to eventually repeat history eventually because Atlanta is where all of the people complaining about being taxed from work – I don’t care how long ago something happened, if it happened for a legitimate reason, that could legitimately happen again – these citizens shouldn’t complain about supporting the lower half of the county now, when 70 years ago it was the opposite, because 70 years can happen again pretty easily. ) Then we talked about the brain train and the idea that it might take 25 years for the beltline to be really begun, when the property and old tracks are already there and just need some cement trucks to get started.

Chris Talking

Chris Talking

The last session I went to was Tim talking showing how reverse engineering with IDA can help find security issues or otherwise audit programs to ensure, or just see what types of comparisons and api calls a given program is making. We reverse engineered code, found a map to where a comparison occurred in a password program, and then rewrote that line to accept any password. One example is to bust the myth of paranormal activity sensors for iphones … see if they’re just random or if they do actually call api functions to the gps, microphone, or g sensor.

A few suggestions for the event would be a chance to get to the schedule, groupthink with people and decide which presentations would be best. I’m not sure than an online schedule would work the best, but it could, so I could figure out who i want to go listen to while listening to a presentation.

Some presentations that I hear were good were “How to Stare at Women” by Sean, a craft homebrew beer session by MSFT Hater dude, a MakeBot cheap 3d printing (plastic) presentation by http://www.ericweinhoffer.com – and Michael Mealling’s space talk.

Late night is getting late (and dang, wordpress wants an update. ) Here I am camping in the middle of the ATDC room, with somebody snoring nearby. Goodnight, I look forward to tomorrow. Maybe I will present about using ffmpeg for your multimedia application/ service tomorrow.

Other late night activities included talking about histories and hobbies with guns (yeah I talked about my 5 in a dime with a 22 and shooting a black powder rifle) under the veil of the Zombie Apocalypse and playing some Call of Duty 4 with some startup modded Xbox controller (sometimes I really wish that I was into video games.)

Finally, a big thanks to the sponsors, Microsoft, the insurance group, tech draw, and ATDC. Learning a lot.

Support Our Sponsor, Check Out Windows 7

Support Our Sponsor, Check Out Windows 7