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by rralph
December 23rd, 2008, 9:54 am
Forum: Careers Forum
Topic: Experienced Product Controller looking for a change
Replies: 0
Views: 44323

Experienced Product Controller looking for a change

<t>Hi All,I'm looking for any views on what my next career step should be. Open to all comments.I've been working for an IB for 10 years (6 years perm, 4 years contract), first in Financial Control, then in Product Control. I've got experience working in rates, equities, and fund-linked products. Fo...
by rralph
December 17th, 2008, 3:01 pm
Forum: Brainteaser Forum
Topic: Thrones
Replies: 13
Views: 47134

Thrones

<t>I hope you all enjoyed this as much as I did.Apologies for the subterfuge, but I am quite interested in the answer. I thought that if I was a bit more cryptic about the setup then it was more likely to peak peoples interest.If anyone still cannot work out what I am talking about, let me know and ...
by rralph
December 17th, 2008, 2:57 pm
Forum: Brainteaser Forum
Topic: Thrones
Replies: 13
Views: 47134

Thrones

Correct!I thought I'd leave another clue floating around for people to get a sniff of.
by rralph
December 17th, 2008, 11:10 am
Forum: Brainteaser Forum
Topic: Thrones
Replies: 13
Views: 47134

Thrones

<t>Each king selects a throne a time at random each day and selects a throne at random every day.The wizard visits both thrones at the same time once a day (a random time each day). Assume that he always gets to visit each throne (if a throne is occupied when he visits, then he waits until the king ...
by rralph
December 16th, 2008, 5:16 pm
Forum: Brainteaser Forum
Topic: Thrones
Replies: 13
Views: 47134

Thrones

<t>In a magical palace there are 50 "kings", and two thrones. Each king is allowed to sit once a day on one of the thrones for 5 minutes. This happens at a random time each day and the throne is picked at random.One of the kings in the palace is cursed. If the cursed king sits on one of the thrones,...
by rralph
December 16th, 2008, 12:55 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>I apologise, I may have come across a bit strong. Novel ideas should always be welcomed. Personally I am turned off by ideas which strike me as over engineered, but that is a personal preference.How about this:Dig a large holeAllow the lake to drain into the holeCount the fish as they go pastIf y...
by rralph
December 16th, 2008, 9:56 am
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>I'm extremely surprised that anyone would try to argue that "a fleet of robotic submarines" and a computer that has the capability to identify and distiguish between individual fish are easier to implement than a random sample of the population. The concept of genetically sampling the water to id...
by rralph
December 15th, 2008, 12:29 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>QuoteOriginally posted by: Traden4AlphaQuoteOriginally posted by: quantystHere's another crazy, but exorbitantly costly (and possibly a scifi), approach: dispatch a squadron (or army) of robotic submarines to photograph all the fish (several times over, if need be), have the photographs analyzed ...
by rralph
December 15th, 2008, 12:26 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>QuoteOriginally posted by: alphaquantumrralph, your methods remind me about similar problem: you have a tiger in the field, and you have to capture it. Describe how would you do that. 1) Shoot it. Any method works fine - gun, rocket, grenade etc. (not an elegant math solution )2) WLOG assume that...
by rralph
December 15th, 2008, 12:15 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>QuoteOriginally posted by: ppauperthrow a stick of dynamite in the lake and count the number of dead fish that results.Use that to estimate the densityThink I already had that one.To be honest, only my first solution was intended to be serious. All my later suggestions were attempts to think outs...
by rralph
December 12th, 2008, 5:24 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>QuoteOriginally posted by: MCarreiraHow do you take into account the (eally small) newborn fish ? They supposedly cannot be caught with methods intended for larger fish.The population should flutuate a lot (Predator-Prey cicles), so your range should be quite wide.Small fry - Do you care? I would...
by rralph
December 12th, 2008, 3:09 pm
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>Couple of ideas:Analyse the entire foodchain (nutrients, available energy, water depth, predator/prey relationship, lifecycle etc) and build a mathematical modelGet a line of boats with fish finder sonar to do a sweep of the whole lake and see what echo returns they getGet the boats to sweep drif...
by rralph
December 12th, 2008, 11:02 am
Forum: Brainteaser Forum
Topic: Fish in a Lake
Replies: 22
Views: 49129

Fish in a Lake

<t>Randomly catch a number of fish, say 100. Tag each one and release them back into the lake.Call the total number of fish in the lake N. Then the proportion of fish in the whole lake that are now tagged is 100/N.Wait a week and then randomly catch 100 fish. Count the number of tagged fish, call th...
by rralph
November 13th, 2006, 8:02 am
Forum: General Forum
Topic: wilmottwiki
Replies: 17
Views: 90974

wilmottwiki

<t>The software behind the site is the same as wikipedia, so I would guess that wilmott.com intends the content to be covered by some version of the GFDL. I think this should be clearly stated somewhere. This is a perfect topic to post on the main page discussion tab. I will start a thread on there....
by rralph
November 2nd, 2006, 6:56 am
Forum: General Forum
Topic: wilmottwiki
Replies: 17
Views: 90974

wilmottwiki

Goto "Special Pages" (left side / toolbox) and then "All articles".I agree that there should be something on the main page. See my comments on the discussion page.
GZIP: On