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Edsger Wybe Dijkstra 对,就是E.W. Dijkstra. 一提到EWD,很多人就会想起找最短路径的Dijkstra Algorithm,就好像一提到Sir. Tony Hoare,就想起Quick Sort一样。其实这些个算法不过是两个牛人在他们职业生涯中最琐碎的贡献。比如Dijkstra算法,无非是戴爷爷在1956年为了展示新计算机 ARMAC的计算能力,初试身手的成果,属于他的算法处女作。据戴爷爷自述,他搞出最短路径算法的时候连纸笔都没用。当时他和他老婆在阿姆斯特丹一家咖啡厅的阳台上晒太阳喝咖啡,突然就把这个算法想出来乐。而且当时的算法研究还比较原始,牛人们忙着用计算机搞数值计算,对离散算法不屑一顾。那时连一个象样的专注于离散算法的专业期刊都没有。戴爷爷于是推迟发表这个算法。直到1959年,他才把这个算法发表在Numerische Mathematik的创刊号上,权为捧场。:-) EWD在多个领域牛气冲天,端的是理论和编程两手硬的高手。只不过他的很多工作比较深刻,学校的老先生们觉得本科生接受不了,不给本科生讲而已。戴爷爷大概因为最短路径算法一战成名,于是有人请他参加另一台计算机X1的设计工作,并且把设计实时中断系统的任务派给了他。现在看来实时中断也许不算什么,但要知到,X1前根本就没有实时中断的概念。实现它简直就是一场豪赌。戴爷爷起初还不情愿,但经不住项目负责人Bram和Carel的轮番“吹捧”:我们知道实时中断让您工作变得非常困难,但象您这样的牛人肯定能做出来的说。结果戴爷爷被糖衣炮弹彻底击穿,接下了这个烫手山芋。两三年后,他不仅搞出了实时中断,还围绕这个写出了自己的博士论文,顺利戴上博士帽。让戴爷爷真正成名立万的还是在X1上开发的Algo60,最早的高级语言之一。戴爷爷没日没夜地工作了8个月,就搞出了Algo60,也因此获得了1972年的图灵奖。因为Algo60,戴爷爷发表了一篇石破天惊的文章:Recursive Programming,于是人们才知道,原来高级语言也可以高效地实现递归,原来从此以后,所有程序员都不可避免地和戴爷爷发明的一个词(应该说是概念)打交道:堆栈。而且Algo60还让戴爷爷深入地思考多道程序设计的问题,最终发明了每个系统程序员都绕不开的概念:semaphore。当然,戴爷爷总是把他发明的概念严格形式化,极具科学家本色的说。和这些成就想比,他提出的吃饭的哲学家问题,也就没什么好说的了。说来好笑,当时的大学(忘了哪所了)还是觉得戴爷爷没有受过正统的数学训练,也不是专门搞数值分析的,所以最后不太情愿地给了他一个教职。这种小挫折并不能妨碍象戴爷爷这样的牛人创造历史。他一边教数值分析(:-D),一边开始开发一个新的操作系统,并培养计算机科学家。几年后,THE Multiprogramming System横空出世。THE是第一个支持松散耦合,显式同步的进程并由此使得严格证明系统没有死锁变得容易的操作系统。可惜戴爷爷任职的系不识货,还强行解散了他的研究小组(1972年戴爷爷给他的系主任说他得了图灵奖,系主任的第一反应是你们搞计算机就喜欢乱发奖)。这让戴爷爷相当郁闷,得了抑郁症。在极度郁闷之中,戴爷爷决定用写作来治疗自己的抑郁症。于是经典就诞生乐:Notes on Structured Programming。戴爷爷从此被尊为结构化编程的奠基人,而且他的抑郁症也被治好乐。EWD太牛,结果他的故事也太多。先到这里吧。1973起,他的故事就在美国发生了。
Atmega8 based usb-programmer for avr microcontrollers.
More infos at blog.gut-man.de/2009/10/04/usbasp-usb-avr-programmer/
PCB
4x 4051
1x 74hc137
1x74hc59
6x 16Pin Sockets
2x 1*10 Male/Female Connectors
4x 2*5 Connectors
5x 100N Caps
1x R220
1x Yellow Square LED
1x EmbarassingYelloWire(tm)
First saw this funny yet true photo 10 years ago titled "What The Customer Really Needed". :D #programming #projectmanagement #developers #it #programmers #meme #funnymemes #innovation #project #tree #swing #client #designer #graphicdesign #expectations
Programmers gathered to discuss their ideas about Emory & Henry College's radio station, WEHC 90.7 FM. Visit www.wehcfm.com for more information and to listen to a live stream. Locally sourced. Globally connected.
Dr. Zoltan was voted #1 Drum Programmer of 2007 by Drum Programmer Magazine for his superior work in Toontrack's Drumkit From Hell. Dr. Zoltan's new album, "Why I Am So Wise, Why I Am So Clever, And Why I Write Such Good Songs..." will be released in 2008 with a guest appearance by Marco Minnemann. Article translated from Swedish.
Tigger decided that she wanted to write programs, too. Unfortunately, she only knows Cobol and I write in C and C# so she was out of luck.
I've been programming a lot of ATtinys for my TinyTX sensors so made up this ZIF programming shield using a scrap of stripboard to make things easier.
I made a one sided pcb of ladyada'a USBtiny avr programmer. It works like a charm, and it's easier to make at home.
The board was made with toner transfer method, also I did the silkscreen by using the same method.
I can provide the eagle project if anybody is interested.
Detailed Product Description Programmer keys for MB ("smart key") The new Mercedes device working with smart key (old and new) using in car since 1997 up to 2005
This is a CPU programmer I designed in early 1985. It burns 68705, 68701 and family devices, pretty much all across the (then) current Motorola spectrum. I did the electronic design as a takeoff from a Motorola application note, and also the PCB layout. The case was done by the company. The PCB was a bit of fun because I had to plan for components on both sides; the ZIF socket mountings didn't leave a lot of clearance between the PCB and the top of the case.
Canon EOS 50D [modified IR response in Hα range], Canon EF-S 18-55mm ƒ/3.5-5.6 IS zoom [ø58mm], several secs exposure, two shots composed in WinImages, RAW to JPEG processing in Aperture. Available light, tripod, 10s shutter delay.
A fashion buyer at her desk.
He was once a senior computer programmer, but today he heads an online fashion platform that has 100 million registered female users.
Meilishuo CEO Xu Yirong, believes that technology is the driving force in the modern fashion industry. Beijing, China, 12/02/2015
We have a Team of practiced, proficient and knowledgeable PHP developers/PHP Programmers in our offshore PHP development /PHP Programming hub in India. Our PHP Development Team Outsource the PHP development Service from past 10 years and they have outsoure LAMP Technology, WAMP Technology, Magento Based Service, Drupal Projects
NEC PROGRAMMER
Keterangan :
COM konektor dan dukungan konektor USB juga,Mileage koreksi º C reset jarak tempuh Anda dengan langsung input data;
Bekerja pada CPU menggunakan papan NEC, dukungan userself upgration.
Berlaku model :
• Citroen Xsara Picasso( NEC MCU in BSI )
• Citroen Xsara 2000-2001 ( NEC MCU in dash )
• Citroen Berlingo 2003 ( NEC MCU in BSI )
• Citroen Saxo ( NEC MCU in BSI )
• Citroen- X-Picasso ( NEC MCU in BSI )
• Peugeot Partner 2003 ( NEC MCU in BSI )
• Peugeot 307 all ( NEC MCU in dash )
• Hyundai- Terrcan JEEP ( NEC MCU in dash )
• Hyundai- KIA ( NEC MCU in dash )
• Hyundai Terracan ( NEC MCU in dash)
• Hyundai Elantra ( NEC MCU in dash)
• Hyundai Sonata ( NEC MCU in dash )
• Honda Civic 2002 ( NEC MCU in dash )
• Honda accord 3.0 (NEC MCU in dash)
• Suzuki Wagon-R ( NEC MCU in dash )
• Renault Clio Sagem Mod2000 ( NEC MCU in dash )
• Renault- Scenic ( NEC MCU in dash )
• Renault Megane Sagem Mod2000 ( NEC MCU in dash )
• Opel Movano Sagem ab Mod2002 ( NEC MCU in dash )
• Opel Agila ( NEC MCU in dash )
• Opel- Corsa ( NEC MCU in dash )
• Alfa 147 ( NEC MCU in dash )
• Chevrolet Caprice-LT2 ( NEC MCU in dash )
• Chevrolet Explore SUV ( NEC MCU in dash)
Description:
COM connector and support USB connector as well, Mileage correction ºC reset your the mileage by directly input the data;
Works on CPUs use NEC board, support userself upgration.
Applicable models :
• Citroen Xsara Picasso( NEC MCU in BSI )
• Citroen Xsara 2000-2001 ( NEC MCU in dash )
• Citroen Berlingo 2003 ( NEC MCU in BSI )
• Citroen Saxo ( NEC MCU in BSI )
• Citroen- X-Picasso ( NEC MCU in BSI )
• Peugeot Partner 2003 ( NEC MCU in BSI )
• Peugeot 307 all ( NEC MCU in dash )
• Hyundai- Terrcan JEEP ( NEC MCU in dash )
• Hyundai- KIA ( NEC MCU in dash )
• Hyundai Terracan ( NEC MCU in dash)
• Hyundai Elantra ( NEC MCU in dash)
• Hyundai Sonata ( NEC MCU in dash )
• Honda Civic 2002 ( NEC MCU in dash )
• Honda accord 3.0 (NEC MCU in dash)
• Suzuki Wagon-R ( NEC MCU in dash )
• Renault Clio Sagem Mod2000 ( NEC MCU in dash )
• Renault- Scenic ( NEC MCU in dash )
• Renault Megane Sagem Mod2000 ( NEC MCU in dash )
• Opel Movano Sagem ab Mod2002 ( NEC MCU in dash )
• Opel Agila ( NEC MCU in dash )
• Opel- Corsa ( NEC MCU in dash )
• Alfa 147 ( NEC MCU in dash )
• Chevrolet Caprice-LT2 ( NEC MCU in dash )
• Chevrolet Explore SUV ( NEC MCU in dash)
My career as a computer programmer/analyst gives me an occasional chance to prepare charts and graphs. There is a much an art as there is a science to preparing these; a good one should give a complete and accurate picture on its own. The most famous example of this is French mapmaker Charles Joseph Minard’s map of Napoleon’s unsuccessful campaign into Russia; it not only shows the route Napoleon’s into Russia and back, but the number of Napoleon’s troops, distance, temperature, location, and direction relative to specific dates.
en.wikipedia.org/wiki/Charles_Joseph_Minard
Back in 2013, I thought it would be neat to take my lineup of Taurus models, and grow it into a “3-D chart” that shows the evolution of Ford cars going back to 1903, in roughly 1/64 scale.
It is hard to see the bands of color; but they represent various eras of Ford design evolution, from the Brass era and Vintage era of the Model T, through the pre- and post-World War II era; on up to the Kinetic Design era of today. The gradual shading shows that design changes did not occur overnight, but through succeeding releases of different models. My breaking up of the timeline to fit on three matts had an unexpected outcome – the first matt shows the early history of Ford cars when Henry Ford was alive, the latter the “Jellybean years”, and the one in the middle represents when Ford stopped placing its trademark blue oval on its cars, and instead used a herald and/or the F O R D name in all caps. Hence, the logos in the corner of each matt. The different rows show the rise of Ford of Europe and the Mustang, along with the various models through the years. The vertical component are the cars themselves; showing how they evolved in style and size over the years; for example, the SUVs/CUVs of today are roughly the same height as Fords prior to 1955.
www.flickr.com/photos/75105572@N08/15971293049/
What was most amazing about the project was the availability of so many models and marks. There are some I actually had to leave out because of space constraints – a 2002 Ranger by Motor Max and an EXP by Etrl, just to name two – because there simply was not enough space. There are also 15 paper models; see if you can spot all 15 of them.