Jeroen Van Goey

At the time that I built it (back in 1986), my options for measuring the projectile speed were very limited - basically, no media capable computers and digital cameras existed, and I didn't even have an oscilloscope. But I measured the speed of the projectile by shooting a marble up into a ball of plasticine. The marble became stuck in the plasticine, and I measured how high the plasticine ball was thrown up. From that, I was able to calculate its speed, and thus its momentum, and from the weight of the plasticine and the marble, I was able to calculate how fast the marble must have hit the ball to give it that momentum. The muzzle velocity for a marble is 67 meters per second, which, it turned out, worked out to 150 mph even (I don't use MPH normally, but I remembered that figure because it worked out so evenly). That's way out of slingshot territory, but still only about half as much as the marble shooting airgun I built 17 years later. - Jeroen Van Goey

The core of the invention is a modification of the divide by two flipflop to retain the marble that falls off the right side, and keep it until the flipflop is flipped to the left by the next marble. See the small diagram above right. The retention of this extra marble allows the state of the marble accumulator to be dumped. The adder would just as well add without it, but the number would have to be read off by the position of the rockers, rather than have the device dump the count out. Really, if such an adder were integrated into a hypothetical marble computer, reading out the result as a series of marbles would be an essential element - Jeroen Van Goey

I didn't have a lot of money when I first got into photography in highschool back in the 1980's, but I wanted a tripod so I could experiment with longer exposures in low light. But I didn't want to spend a lot of money. So I set out to build my own. So I built a tripod out of wood, and later a more refined tripod. This page details some of the things I figured out and hints if you want to build your own wooden tripo - Jeroen Van Goey

"> Ok, now how do I get it to rotate the video 90 degrees for when people hold the camera sideways to shoot video? mencoder -vf rotate=1 -ovc lavc -oac copy "$1" -o "$1"-rot.avi" - Jeroen Van Goey

As many as three passwords may be needed for any ThinkPad computer: the Power-on password, the Hard drive password (master and user), and the Supervisor password. - Jeroen Van Goey

I think I've figured it out. It gets re-enabled due to the new "disable touchpad while typing" feature, which turns it back on AFTER you stop typing. I unchecked that in System > Preferences > Mouse > Touchpad, and now the touchpad stays off after disabling in either gpointing-device-settings or gsynaptics. - Jeroen Van Goey

Sinds 2003 begeleidt en adviseert de 3coach Wim De Doncker duursporters van alle niveau’s uit alle windhoeken van ons land. Talloze atleten hebben reeds dankzij de 3coach grenzen verlegd, doelen gehaald en de lat opnieuw hoger ingesteld. Sinds oktober 2007 wordt hij ook bijgestaan door naamgenoot Wim van de Wielle die met evenveel passie atleten helpt in het verwezelijken van hun doelstellingen. In februari 2009 tenslotte maakt Christiaan Meuser van het bestaande duo een trio en zijn de 3coachers letterlijk en figuurlijk met drie ! - Jeroen Van Goey

SCIENTIFIC COMPUTING WITH PYTHON WEBINARS - Jeroen Van Goey

Luxe vakantie huis Nisramont Tussen La Roche-en-Ardenne en Houffalize ligt boven op een 400m hoge heuvel het pittoreske dorpje Nisramont. Daar bevindt zich aan de rand van het dorp en op een steenworp van het stuwmeer van Nisramont deze gloednieuwe ( 2008) luxueuze, moderne ***** villa voorzien van alle comfort. Het 360° panoramische uitzicht is geweldig, zo ook vanaf de jacuzzi (5 pers) op het overdekte terras. - Jeroen Van Goey

Disease relevance of Attention Deficit Disorder with Hyperactivity Catechol O-methyltransferase gene variant and birth weight predict early-onset antisocial behavior in children with attention-deficit/hyperactivity disorder [1]. In a child with minimal brain dysfunction, we found that chorea was related to the major central effect of methylphenidate and probably to the effect of the drug on central catecholaminergic systems [2]. BACKGROUND: Impulsivity is a common feature of attention-deficit/hyperactivity disorder (ADHD), and evidence suggests that impulsivity traits may be an indicator of poor prognosis for individuals with bulimia nervosa [3]. The mouse mutant coloboma (Cm/+), which exhibits profound spontaneous hyperactivity and bears a deletion mutation on chromosome 2, including the gene encoding synaptosomal protein SNAP-25, has been proposed to model aspects of attention-deficit hyperactivity disorder [4]. - Jeroen Van Goey

Say you take a person with a performance orientation ("Paul") and one with a mastery orientation ("Matt"). Give them each an easy puzzle, and they will both do well. Paul will complete it quickly and smile proudly at how well he performed. Matt will complete it quickly and be satisfied that he has mastered the skill involved. Now give them each a difficult puzzle. Paul will jump in gamely, but it will soon become clear he cannot overcome it as impressively as he did the last one. The opportunity to show off has disappeared, and Paul will lose interest and give up. Matt, on the other hand, when stymied, will push harder. His early failure means there's still something to be learned here, While a performance orientation improves motivation for easy challenges, it drastically reduces it for difficult ones. And since most work worth doing is difficult, it is the mastery orientation that is correlated with academic and professional success, as well as self-esteem and long-term happiness - Jeroen Van Goey

"Make sure to submit your picture to the [astrometry](http://www.flickr.com/groups...) group on Flickr. The stars in your picture will then be analyzed by the “ [blind astrometry server](http://code.flickr.com/blog...: a program which from the unique star positions figures out what part of the sky was photographed and what interesting planets, galaxies or nebulae are contained within. The program will then make a comment on your picture, giving a high-quality description of what’s in your photo and the main Astrometry.net project gets a new image to add to its storehouse of knowledge." - Jeroen Van Goey

Attention-deficit hyperactivity disorder (ADHD) is frequently found in childhood and persists in about 50% of cases into adulthood. Several studies demonstrate a relationship between ADHD, circadian rhythmicity and sleeping disturbances in unmedicated ADHD patients. Since ADHD is a very complex disease with a high genetic load involving multiple genes of moderate effect, we hypothesized a link between adult ADHD and genes involved in the circadian timekeeping system. A 3'-UTR polymorphism of the circadian locomotor output cycles protein kaput (CLOCK) gene, rs1801260, has been linked to disturbed sleep patterns, although both the C-allele and more controversially the T-allele have been proposed as risk factors for different measures of evening preference. This study compared self-rating and interview based measures of ADHD psychopathology of 143 subjects with and without ADHD with their rs1801260 genotype to test the hypothesis that ADHD is linked to one of the alleles - Jeroen Van Goey

The most extreme example is Parkinson's disease, where less than 1% of the likelihood of developing the condition can be attributed to genetic factors. Sensibly, I think, deCODEme doesn't report a genetic risk for this condition. But 23andMe makes a point of highlighting a result that will have almost zero meaning for the vast majority of its customers. (An exception is Google mogul Sergey Brin, husband of 23andMe founder Anne Wojcicki, who carries a rare SNP that predisposes to Parkinson's). Still, some SNPs carry greater significance. One of the most worrying things that you can learn from a genome scan concerns a gene called APOE. About 2% of people of European ancestry carry two copies of an APOE variant known as ɛ4, which greatly increases their susceptibility to Alzheimer's disease. Indeed, when James Watson, co-discoverer of the double-helix structure of DNA, had his genome sequenced, APOE was the one region that he chose not to reveal. - Jeroen Van Goey

How does one find a gene of interest and determine that gene's structure? Once the gene has been located on the map, how does one easily examine other genes in that same region? How can sequence-tagged sites within a DNA sequence be identified? During a positional cloning project aimed at finding a human disease gene, linkage data have been obtained suggesting that the gene of interest lies between two sequence-tagged site markers. How can all the known and predicted candidate genes in this interval be identified? What BAC clones cover that particular region?A user wishes to find all the single nucleotide polymorphisms that lie between two sequence-tagged sites. Do any of these single nucleotide polymorphisms fall within the coding region of a gene? Where can any additional information about the function of these genes be found?Given a fragment of mRNA sequence, how would one find where that piece of DNA mapped in the human genome? Once its position has been determined,... - Jeroen Van Goey

28. Rogaev FJ656215(Emperor Nicholas) Haplogroup T2 27-FEB-2009 A73G A263G 315.1C G709A A750G A1438G A1842G G1888A A2706G T2850C T4216C A4769G A4917G G6257A T7022C C7028T G8697A A8860G T10463C A11251G G11719A A11812G G13368A T13965C A14233G A14687G C14766T G14905A A15326G C15452A A15607G G15928A T16126C C16169Y C16294T C16296T T16519C - Jeroen Van Goey

R1b (M269 positive) is the most commonly observed haplogroup in individuals of European descent. R1b reaches a frequency of over 90% in parts of Iberia and Western Ireland and decreases eastward towards the Near East, although is present in parts of Central Asia. R1b is considered a marker of Palaeolithic European hunter-gatherer ancestry. These products will be of interest to those who have strong evidence from previous DNA testing (Y-SNP designation or 10+ STRs) suggesting they belong to the R1b haplogroup. - Jeroen Van Goey

The rCRS sequence below is the Cambridge Reference Sequence Anderson et al 1981 as revised by Andrews et al 1999. It differs from the original CRS and other complete hmtdna GenBank sequences in that it has eighteen corrected or confirmed nucleotides as annotated below. See the summary table of the reanalysis by Andrews et al. * Seven nucleotides are considered to be rare polymorphisms and were determined to be correct as originally sequenced (J01415 gi:337188). . The seven rare polymorphisms are shown below in bold green capital letters. * Eleven nucleotide errors in the original CRS have been corrected by re-sequencing the original placental material. The errors in the original Cambridge sequence have been attributed to sequencing errors (8 instances) and to the inclusion of bovine (2 instances) or HeLa (1 instance) DNA. See summary table. *3107del is maintained in this revised sequence with the gap represented by an 'N'. - Jeroen Van Goey

"You can find some pics [on her blog](http://www.jetsetblog.com/about...)." - Jeroen Van Goey

Homo sapiens isolate Emperor Nicholas II mitochondrion, complete genome. ACCESSION FJ656215 - Jeroen Van Goey

Haplogroup T is an Indo-European haplogroup that separated from B,U,F,HV about 40,000 ybp, and from J, maybe 15,000 ybp. - Jeroen Van Goey

R1b1b2a1a L11/S127, L52, P310/S129, P311/S128 - Jeroen Van Goey

1 probandus 2 ouder vader moeder 3 grootouder grootvader grootmoeder 4 overgrootouder Etc. Etc. 5 betovergrootouder 6 oudouder 7 oudgrootouder 8 oudovergrootouder 9 oudbetovergrootouder 10 stamouder 11 stamgrootouder 12 stamovergrootouder 13 stambetovergrootouder 14 stamoudouder 15 stamoudgrootouder 16 stamoudovergrootouder 17 stamoudbetovergrootouder 18 edelouder 19 edelgrootouder 20 edelovergrootouder 21 edelbetovergrootouder 22 edeloudouder 23 edeloudgrootouder 24 edeloudovergrootouder 25 edeloudbetovergrootouder 26 edelstamouder 27 edelstamgrootouder 28 edelstamovergrootouder 29 edelstambetovergrootouder 30 edelstamoudouder 31 edelstamoudgrootouder 32 edelstamoudovergrootouder 33 edelstamoudbetovergrootouder 34 voorouder 35 voorgrootouder 36 voorovergrootouder 37 voorbetovergrootouder 38 vooroudouder 39 vooroudgrootouder 40 vooroudovergrootouder 41 vooroudbetovergrootouder 42 voorstamouder - Jeroen Van Goey

maternal: T2b2 Haplogroup T is thought to have originated in Mesopotamia and/or the Fertile Crescent (modern Syria and Turkey) approximately 10,000-12,000 years ago, and then moved northwest in to Europe In his popular book The Seven Daughters of Eve, Bryan Sykes, who is himself in Haplogroup T, named the originator of this group "Tara," which means rocky hill in Gaelic. Sykes believes that: "Tara herself lived 17,000 years ago in the northwest of Italy among the hills of Tuscany and along the estuary of the river Arno. "The mitochondrial Haplogroup T is best characterized as a European lineage. With an origin in the Near East greater than 45,000 years ago, the major sub-lineages of Haplogroup T entered Europe around the time of the Neolithic 10,000 years ago. Once in Europe, these sub-lineages underwent a dramatic expansion associated with the arrival of agriculture in Europe. Today, we find Haplogroup T*, the root Haplogroup for Haplogroup T, widely distributed in Europe." - Jeroen Van Goey

Every year since 2005, I’ve spent the better part of a week in late December planning my life for the next year. Overall, this is probably the best decision I’ve made in terms of working towards multiple goals simultaneously. The idea is to create a road map for the year ahead – not a rigid daily schedule, but an overall outline of what matters to me and what I hope to achieve in the next year. I complete this process in bits and pieces over several days, partly because of my ADD brain but also because it helps to think about it slowly. Some of you who have the ability to concentrate on one thing for hours at a time may prefer to do this all at once. - Jeroen Van Goey

Welcome to the Art of Non-Conformity site, a home for unconventional people doing remarkable things. I'm glad you're here. - Jeroen Van Goey

reading Buffett's letters is like getting a "poor man's MBA." - Jeroen Van Goey

If you’re visiting from today’s Marketwatch.com article, welcome. I’m a recent Stanford grad and this is a blog on personal finance and personal entrepreneurship for college students, recent college grads, and everyone else. (Featured in the Wall Street Journal, New York Times, US News & World Report online, etc.) This blog is me ranting about a few things and trying to get the points across. Getting started is more important than being the smartest person in the room. Making mistakes is ok. Action is more important than reading 50 blogs. Ordinary actions get ordinary results. And there’s a difference between being sexy and being Rich. - Jeroen Van Goey

SubReddit Finder - Jeroen Van Goey