HNHacker News
TopNewBestAskShowJobs

draker

329 karma · joined February 5, 2013

contact: drakerHN@gmail.com
submissionscomments
draker··on Show HN: Code4Startup - Learn to code by cloning real life startups
I paid for a Team Treehouse subscription in their early days because of the quality.

I first tried a 2 week free trial, which I canceled because while good quality there was not enough content to justify paying. I returned later once there was more content (Ruby/RoR was added) I did a 50% off the first month trial and kept the subscription for 4-6 months.

I think it would be good to offer a one month 50% off discount, or maybe a similar "cancel in 2 weeks and you pay nothing" trial. With the number of products available, I was always hesitant to base my opinion on the free lessons except for maybe Code School. They were not comparable in scope to the other lessons offered and I was worried of a bait and switch, with the added kicker of being out $25-50 I could have used for another book or course.

draker··on Ask HN: Build it and they will come or 50% marketing?
>You can spend countless hours making improvements but without a user base, you have no idea if they are needed or wanted.

This is on the right track and I would say that the improvements, iterations and additons to the product should be focused towards the revenue generating users.

It can be difficult to identify this segment, but it is worth the time to do so. Every user will have suggestions for improvement but if the person never intends to pay for the product or only requires the free features then you are wasting your time improving the product for them. This doesn't mean you should ignore the non-paying users, rather you should listen primarily to their suggestions for what the product requires for them to be a paying customer. If you find that a large number of non-paying users would convert to paid if you had X feature; determine the cost and potential revenue of adding the feature.

draker··on Full-Text Search in JavaScript
Novice question: Is the "www-" just part of the given subdomain or is there something else that occurs using that syntax?

"http://nlp.stanford.edu/IR-book/" resolves to the same resource.

draker··on How tinkerers brought PID temp control to espresso machines
Commercial coffee grinders are periodically calibrated to ensure they are providing the proper grind. When new both the $100 unit and $700 unit would likely provide similar results. Over time the commercial unit (built to handle higher volume) would remain in-spec without calibration for a consumer user whereas the grind of the $100 unit would likely degrade from wear.
draker··on How the Internet works
Any recommendations that aren't textbooks?

Even the Kindle version of that book is $100.

draker··on Japanese plant experts produce 10k lettuce heads a day in LED-lit indoor farm
>It's not as if sunlight is a sparse resource (on a global scale).

Water is though, especially water that is fit for food production. This process (and others like it) makes a huge improvement on the amount of water required in comparison to traditional outdoor farming.

>The lights give them the ability to control temperature, humidity and irrigation, allowing it to cut its water usage to 1 per cent of that needed by outdoor fields, while also growing lettuces two-and-a-half times faster, the experts claim.

draker··on Small Data: Tinder-like apps are the way of the future
It isn't the mutual selection alone, but that feature in combination with swiping (basically a first impression) and inability to go back make it substantially different than dating sites.

To my knowledge dating sites usually have pages of profiles you search though. If you see someone you select, but say you go through 5 pages and no one catches your eye but you're out of matches. You may be willing to go back through and lower your standards to make some matches.

This is also aided by Tinder being a more dynamic app. The number of people that are active(discoverable) changes day to day, whereas a dating site is essentially static; with only new users adding more potential matches.

draker··on Imgur is being used to create a botnet and DDOS 8Chan
It was just announced yesterday that Hiroyuki Nishimura (founder of 2chan) is the new owner of 4chan. There are past disputes with the owner of 8chan (Jim Watkins) and Nisimura mainly due to monetizing the site (2chan).

It could be an effort to stifle 8chan in an attempt to drive users to 4chan so that it can be better monetized by Nishimura.

>After 8chan received a surge of new users, founder Fredrick "hotwheels" Brennan worked out a deal to have its content hosted by the same folks who hosted 2channel's imageboards. Last week, Brennan confirmed that he is no longer 8chan's owner but instead a paid administrator, which he claimed was due to domain-name transfers and the fact that the financial and technical support offered by the site's current owner, Jim Watkins, is the reason the site has not yet shut down.

>Watkins' name figures into the story for another reason: he wrested administrative control of 2channel away from Nishimura in 2014. The site had already been run on American servers to bypass more restrictive Japanese content laws, and imageboard users have alleged that this change of ownership occurred, in part, due to how Nishimura handled—and possibly sold—users' private data. Nishimura has yet to speak on the record about such allegations, though we imagine he'll receive questions about those and his 2channel breakup during an official 4chan Q&A on Tuesday, September 22, at 8pm EST.

http://arstechnica.com/business/2015/09/imageboard-sites-4ch...

draker··on Codestarter is winding down
It is unfortunate they are shutting down, but if they were only using donations as a means of funding it seems inevitable.

Maybe a dual mission/stage program would have been better.

Use initial donations to buy laptops, rent space and pay for speakers to have a coding bootcamp type program for unemployed or disadvantaged people. If you wanted the primary focus to be on school age kids you could consider highschool juniors/seniors that were not planning to go to college.

Prepare them for a job as an entry level coder or designer. When they get a job hopefully they will donate back to the program and/or provide mentorship for the new sections.

If establish the older section (age 16+) first, you could have additional funding opportunities by having the students host, "How to use {software/product}" classes. Ask for donations or a recommended fee for those that could afford it. Also make it available for free to help other disadvanted job seekers learn the fundamentals of Windows, Office, Internet searching, etc.

Once you had some older established alumni or employees you could transition to the younger demographic by hosting coding classes and summer camps for a fee. Then use the revenue to sponsor under privileged kids to attend it as well.

The goal would be to have the kids attending for free eventually transition to junior counselers or teachers for the camps and classes.

It would take a few years, and could still fail, but would have a better chance of surviving with a revenue model that didn't focus solely on outside donations.

draker··on Popular Electronics Magazine 1954 to 1982
Popular Mechanics and Popular Science are both available as well.

Popular Science 1872-2009: http://books.google.com/books?id=2CgDAAAAMBAJ

Popular Mechanics 1905-2005: http://books.google.com/books?id=RdMDAAAAMBAJ

draker··on How a differential gear works (1937) [video]
For manually operated lockers the axle shafts have to be moving at the same speed or with very little difference in speed to be engaged.

>Only engage the Eaton ELocker™ differential while the vehicle is stationary or operating at speeds of 3 mph or less with minimal wheel slippage.

This specific locker (Eaton G80) is self-engaging up to a set speed which is intended to prevent this from happening, though it has been known to occur.

>The G80 can be very effective when used within its limitations. However its very design can lead it to failure. It requires a certain amount of speed difference between both rear wheels to operate. Basically more slip than you would ever encounter going around a turn, but it will not lock at speeds above roughly 20-30mph. This it where it earned the name "gov-lock". It has a speed governor that operates off centrifugal force inside to govern locking.

When it locks, it locks hard. Imagine one tire sitting still, and suddenly being launched to a speed of 20-25mph. That takes a great deal of force and puts a lot of strain on internals. They have a tendency to break with no warning.

Page also has photos of one that has failed.

http://www.ar15.com/forums/t_1_134/1250761_g80_differential_...

draker··on How a differential gear works (1937) [video]
I had not seen this particular video but have seen the "How a manual transmission works" from the same series.

https://www.youtube.com/watch?v=aAWxZRuBXtw

draker··on Apple takes down another indie dev
Are you trolling?

Your profile states:

>my AppleTV runs XBMC

Which breaks the terms of your Apple TV software agreement. http://images.apple.com/legal/sla/docs/appletv.pdf

>You may not, and you agree not to or enable others to, copy (except as expressly permitted by this License), decompile, reverse engineer, disassemble, attempt to derive the source code of, decrypt, modify, or create derivative works of the Apple Software or any services provided by the Apple Software or any part thereof (except as and only to the extent any foregoing restriction is prohibited by applicable law or to the extent as may be permitted by licensing terms governing use of open-source components that may be included with the Apple Software).

>BY USING YOUR APPLE TV, YOU ARE AGREEING TO BE BOUND BY THE TERMS OF THIS LICENSE, UNLESS YOU RETURN THE APPLE TV IN ACCORDANCE WITH APPLE’S RETURN POLICY. IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENSE, DO NOT USE THE APPLE TV.

So, like it or not, it's what you agree to when buying an Apple TV. You should probably return or not use your Apple TV

draker··on I banned email at my company
The problems with email in this article are nearly the same as those given by Klink founder Leerom Segal in an INC magazine article about Outlawing Email. Though Klink opted to build their own workflow management system to address these issues.

http://www.inc.com/jeff-haden/the-company-that-outlawed-emai...

Key highlights from INC article:

>“While email makes for a decent communication tool with clients, internally it doesn’t facilitate collaboration and basic workflow. Email has no intelligent mechanisms for prioritization, lacks context, lacks a framework for knowledge management, and saps accountability.”

>“We’ve all been on an e-mail thread where people are answering questions but really just creating more confusion,” Segal says, “or maybe referencing some missing yet critical attachment. So we looked for tools to help us better manage our basic workflow.”

>Knowledge can get lost in a person’s mailbox and prioritization is basically nonexistent since inboxes assume that most recent equals most important.

draker··on Failed many times before raising $13M on Kickstarter
In his prototype he used an 18v angle grinder, which I think would do a decent job blending. Given the blender setup seems to be one of the key features, I think more of the feature budget will go towards the blender. If they upgrade to a higher rpm motor for production, I believe it would be sufficient for making drinks.

Prototype build: http://www.instructables.com/id/Cooler-with-Blender-and-Blue...

draker··on Town Becomes a Beer Ad, but Residents Don’t Feel Like a Party
The reason they are calling it, "Whatever, USA" is this contest is part of the "Up For Whatever" campaign. Another event in this campaign was the Superbowl commercial where they take a guy out for "the night of his life", after agreeing to someone asking him if he, "was up for whatever happens next".

I understand the negative and dismissive feeling "whatever" conveys, though it makes sense in the context of the campaign.

draker··on Don’t Want Me to Recline My Airline Seat? You Can Pay Me
Are you tired of the passenger behind you on flights always disrupting your flight? Ms. Hacker or Mr. Business bouncing your seat as they decided the tray table is a laptop desk? Being unable to recline your seat as s/he's using the Knee Defender?

Do we have the product for you! Introducing, the Tray Oppressor!

A convenient strap to stop the tray table attached to YOUR seat from opening. You paid for this seat, enjoy it without the Knee Defender impeding your recline or those unnerving tray tremors.

Simply place the Tray Oppressor around your seat ensuring to overlap the tray, tighten and enjoy a great flight!

It's FAA regulation that tray tables must be up during takeoff so no need to worry about boarding early, just wait for takeoff and stop that tray.

draker··on NY Times releases military surplus gear data on GitHub
Patrick Air Force Base is in Brevard County.

"Headquartered at Patrick Air Force Base, Florida, the 920th Rescue Wing is the Air Force Reserve Command's premier combat search and rescue (CSAR) unit. The wing consists of over 1,500 Airmen, trained and equipped to locate and recover U.S. Armed Forces personnel during both peacetime and wartime military operations."

http://en.wikipedia.org/wiki/920th_Rescue_Wing

draker··on Ask HN: Review my startup – itripd.com
I have a recommendation though don't want to share publicly as it's competitively sensitive. Contact me (email in profile) when you have a chance.

Edit: John, your server is rejecting my reply to your email. Check your settings or contact using a different email.

draker··on LOLCODE
Unary: convert Brainfuck programs to unary number system source code.

http://esolangs.org/wiki/Unary

draker··on Why Seven Hours of Sleep Might Be Better Than Eight
I often do the same though I have found different lighting levels to help set myself into a "preparing for sleep state". I try to mirror the same settings I would use if reading a paper book, even when reading on iPad.

Ceiling lights on, bed made: awake time.

Nightstand light on, 2 pillows propped again headboard to lay/sit up more: reading time.

Lights off, 1 pillow: sleep time.

draker··on My Critique of HealthKit as Both iOS Dev and Registered Nurse
After looking further at HealthKit I agree it solves the dashboard, and sensor calculation methods (to the extent of supported hardware types).

The physician review of this data would still take time from the visit. While this can be corrected with changes to the consultation procedure, that in itself has side-effects (longer consultation -> fewer appointments/day -> longer time until next available appointment && increased cost).

If the API integrates with the EHR backend and the doctor can receive this data prior to your appointment and have this data stored in the EHR then these problems are mitigated. Though, these issues still stand, "with zero EHR integration".

draker··on My Critique of HealthKit as Both iOS Dev and Registered Nurse
> Just gathering sensor data and showing it to your doctor at your next visit could be extremely useful, even with zero EHR integration.

I disagree. The two problems with this would be primarily from the doctor's perspective.

1. Doctor arrives to exam room, "Doc I have been using XYZ app, take a look at this data."

- Doctor has to figure out interface if s/he hasn't used before.

- Has to locate the meaningful data in this "hyper-detailed log book" and interpret.

- Doctor has to assess whether this information is valid; does this app use proper calculation methods (algorithms, formulas, significant digits) and are the sensors accurate.

- Doctor has to adjust schedule to account for time to interpret this new data, as s/he has no ability to review prior.

2. Assuming no problems with the first point. Doctor has this data and identifies a trend, let's say high blood pressure. Doctor prescribes medication and sends you on your way. The doctor has a huge liability as a medication has been prescribed and there is no documentation of the data used to make the diagnosis. If there is an adverse reaction and a malpractice suit is filed, the burden of proof is on the physician.

draker··on How I got a dev job at Khan Academy without a CS degree or dev work experience
> grill you on CS fundamentals

Could you provide some examples of questions you were asked?

I majored in entrepreneurship so my idea of "CS fundamentals" may be different from yours, but I took Harvard's CS50 class and felt that it provided a very good introduction to CS.

draker··on Show HN: The Rap Test
My thought was that he may be able to use the iTunes 30 second previews but after looking into it further I think this would qualify as "the main focus [..] of a web experience".

> 5. Song previews can only be used to promote the track. They cannot be used for entertainment independent of that purpose, or as the main focus of an App or web experience.

http://www.apple.com/itunes/affiliates/resources/blog/song-p...

draker··on Programming Language Breakdown for the HealthCare.gov Website
I've got to work on my submission titles.

> Healthcare.gov developer provides estimate in response to "500M lines of code" 5 hours ago

The chart from the submitted blog post does provide a nice visual perspective of the breakdown that you don't get from the source alone.

http://www.randalolson.com/wp-content/uploads/healthcare-gov...

draker··on Teaching Entrepreneurship Gets an Incomplete
Article if you hit paywall:

Teaching Entrepreneurship Gets an Incomplete

Colleges are churning out entrepreneurial-minded students, but there's no evidence of benefits yet.

By: Carl Scramm

Many colleges and universities across the country offer courses and programs in "entrepreneurship." Are they worthwhile? Entrepreneurship is apparently an occupational category now, yet when it comes to judging the value of what they teach, its practitioners are flying blind. They and their students could learn a lot from how the medical field evolved.

A century ago, nobody had ever evaluated physicians based on patient outcomes. Then Dr. Ernest Codman proposed in 1914 that Harvard University, where he taught, host an annual conference on morbidity and mortality so that medical innovations could be evaluated by their effectiveness. The suggestion was unwelcome. But Dr. Codman kept meticulous records on his surgical patients and reported his results publicly, calling his method the "end results theory." Harvard dismissed him from the faculty.

In 1974, Dr. David Eddy of Duke medical school discovered that only a handful of studies supported the widely taught approach to breast-cancer surgery. He then began looking into the empirical basis for many standard treatment methods, and found that much of the course material for medical school lacked reliable evidence, such as results of a controlled clinical study. A decade later, thanks to Dr. Eddy's pioneering research, nearly every therapeutic act—from prescribing drugs to recommending surgery—was subject to scrutiny. Using empirical evidence to predict outcomes is now the standard in modern medicine.

Where's the Dr. Eddy of entrepreneurship? Thousands of institutions—universities, community colleges, even high schools—offer courses that purport to prepare students for careers as entrepreneurs. Yet there is no employer demand for people trained in the "art" of entrepreneurship, nor does the training offer any recognized value in other jobs. Indeed, one can receive a Ph.D. in entrepreneurship even though there is no academic consensus on what works for starting a new business. Not surprisingly, as the number of entrepreneurship teachers grows, the number of new businesses continues to decline.

At least part of the problem stems from the content of courses, which were invented by business-school professors. The first entrepreneurship course was offered at Babson College in 1967. There are now at least 1,957 full-time professors of entrepreneurship, according to 2014 membership data from the Academy of Management. The teaching approach, cobbled together from strategic-planning and venture-finance insights, is more prescriptive than objective, telling entrepreneurs what they should do instead of teaching business basics. For instance, there is now a narrative about how a new business should begin. Success, it is taught, hinges on writing a business plan. But most of history's exemplary businesses didn't have a plan when they began.

Most guides to entrepreneurship presume new businesses will need venture capital. Yet venture financing is important to a very small percentage of startups. Everyone knows, the textbooks say, that college-aged students are the progenitors of all great startups. (That may explain why it's an undergraduate course.) In reality, the nation's fastest-growing businesses are started by 40-year-olds. Nearly 75% of new entrepreneurs are over 35, according to a 2012 report on entrepreneurial activity by the Kauffman Foundation (an organization I used to run). And while Silicon Valley gurus believe a startup must begin in California, the same Kauffman Foundation report showed that in 2012 there were more startups per capita in Montana, Vermont and Nevada than all other states.

Case studies are commonly accepted as the best way to teach entrepreneurship. Case studies were the preferred teaching method in medicine before Dr. Eddy figured out that you need statistical evidence to test the validity of what's being taught. Teachers of entrepreneurship can cherry pick cases to find examples that conform to their beliefs about how businesses should start. Yet just like in the days before evidence-based medicine, there are no significant data to confirm that graduates of entrepreneurship programs go on to start successful businesses.

It is time for an evidence-based revolution. Entrepreneurs are the only doctors who can nurse the economy back to health, creating jobs and wealth. That makes what future business builders are taught all the more important—and right now it isn't clear that the student entrepreneur or society is getting a good return on investment.

Mr. Schramm is University Professor at Syracuse University.

draker··on Show HN: SecurityOverboard, a job board for information security positions
You should create a tagline that uses "jumping ship" to play off of overboard.

"Current job making you want to jump ship? Find the security position you want and get back on board quickly with SecurityOverboard."

draker··on Ask HN: What's the best programming book you've read recently?
Those two books are recommended in this blog post; there are a few other resources mentioned you may want to look into.

http://javascriptissexy.com/learn-intermediate-and-advanced-...

draker··on Ask HN: Charity to pair tech mentors with interns to dive into non-profits
I think this is a great idea and is exactly how capstone projects were generated for my entrepreneurship major.

A form was available for local businesses to request help for strategic planning. The owner would submit their proposed project and expected outcome. The professor gave students a survey to get a general idea of sectors and topics the students were interested in. He would take the survey results into account and select enough companies for every team to have 3-5 people.

A brief of each company was written with the general project scope and distributed to students. Students would rank the top 3 projects they wished to work on and were then assigned teams.

Mentors with experience in each businesses particular industry would be assigned to teams to provide expert opinion.

I think the problem would be the need to have projects that were "capstone level" if you intended to have computer science majors doing this. Apps, scheduling widgets and other technical projects may satisfy this but website creation or redesign would not.

A better avenue might be to work with coding bootcamps; as they would have mentors in place and are focused on more entry level websites and applications.

← PreviousPage 2 of 3Next →