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- Newsgroups: comp.parallel
- Path: sparky!uunet!gatech!hubcap!fpst
- From: magnus@solaris.astro.uu.se (Magnus Selhammar)
- Subject: Re: parallel search
- X-Char-Esc: 38
- Message-ID: <1992Sep14.123012.16414@hubcap.clemson.edu>
- X-Charset: ASCII
- Sender: fpst@hubcap.clemson.edu (Steve Stevenson)
- Nntp-Posting-Host: solaris.astro.uu.se
- Organization: Astronomiska Observatiet i Uppsala
- Date: 13 Sep 1992 12:43:01 GMT
- Approved: parallel@hubcap.clemson.edu
- Lines: 131
-
- > From: UPSALA::"rodrigue-joe@CS.YALE.EDU" 13-SEP-1992 04:31:21.96
- > To: magnus@solaris.astro.uu.se (Magnus Selhammar)
- > CC:
- > Subj: Re: parallel search
- >
- >>> I am looking for references to Parallel search algorithms on
- >>> ordered/partially ordered structures.
- >
- >> I am also looking for search algoritms, even though my interest is in almost
- >> ordered structures. What surprises me is that it's so difficult to find
- >> such methods on searching. Yes, the field is new, but it's a very general
- >> problem that should interest many persons.
- >
- > how do you define this problem? thanks.
-
-
- I hope you don't mind that I post your reply. I am very grateful for it since
- you are the only one who replied.
-
- In a volume of N particles, find the n spatially nearest neighbours,
- to every particle. Assume that the nn's to a particle p are ordered
- around p in the computer memory according to, say, a Gaussian law. This
- implies a higher probability to find a nn close to p in the memory than far
- away in the memory.
- This is a problem in N-body methods where p interact with all other particles
- in a finite volume around p, where this volume depends on the distances to
- these nn's.
- I am doing this on a Connection Machine. With almost ordered I mean that it's
- possible to order the particles in the memory according to their spatial
- coordinates, but that it is not possible to do it exact.
-
- This is a description of my special problem. I am interested to hear or read
- posts from others on searching in structures.
-
- Magnus Selhammar
-
-
- From: magnus@solaris.astro.uu.se (Magnus Selhammar)
- Path: solaris.astro.uu.se!magnus
- Newsgroups: comp.parallel
- Distribution: world
- Followup-To:
- Organization:
- Subject:
- Keywords:
-
- > From: UPSALA::"rodrigue-joe@CS.YALE.EDU" 13-SEP-1992 04:31:21.96
- > To: magnus@solaris.astro.uu.se (Magnus Selhammar)
- > CC:
- > Subj: Re: parallel search
- >
- >>> I am looking for references to Parallel search algorithms on
- >>> ordered/partially ordered structures.
- >
- >> I am also looking for search algoritms, even though my interest is in almost
- >> ordered structures. What surprises me is that it's so difficult to find
- >> such methods on searching. Yes, the field is new, but it's a very general
- >> problem that should interest many persons.
- >
- > how do you define this problem? thanks.
-
-
- I hope you don't mind that I post your reply. I am very grateful for it since
- you are the only one who replied.
-
- In a volume of N particles, find the n spatially nearest neighbours,
- to every particle. Assume that the nn's to a particle p are ordered
- around p in the computer memory according to, say, a Gaussian law. This
- implies a higher probability to find a nn close to p in the memory than far
- away in the memory.
- This is a problem in N-body methods where p interact with all other particles
- in a finite volume around p, where this volume depends on the distances to
- these nn's.
- I am doing this on a Connection Machine. With almost ordered I mean that it's
- possible to order the particles in the memory according to their spatial
- coordinates, but that it is not possible to do it exact.
-
- This is a description of my special problem. I am interested to hear or read
- posts from others on searching in structures.
-
- Magnus Selhammar
-
-
- From: magnus@solaris.astro.uu.se (Magnus Selhammar)
- Path: solaris.astro.uu.se!magnus
- Newsgroups: comp.parallel
- Distribution: world
- Followup-To:
- Organization:
- Subject:
- Keywords:
-
- > From: UPSALA::"rodrigue-joe@CS.YALE.EDU" 13-SEP-1992 04:31:21.96
- > To: magnus@solaris.astro.uu.se (Magnus Selhammar)
- > CC:
- > Subj: Re: parallel search
- >
- >>> I am looking for references to Parallel search algorithms on
- >>> ordered/partially ordered structures.
- >
- >> I am also looking for search algoritms, even though my interest is in almost
- >> ordered structures. What surprises me is that it's so difficult to find
- >> such methods on searching. Yes, the field is new, but it's a very general
- >> problem that should interest many persons.
- >
- > how do you define this problem? thanks.
-
-
- I hope you don't mind that I post your reply. I am very grateful for it since
- you are the only one who replied.
-
- In a volume of N particles, find the n spatially nearest neighbours,
- to every particle. Assume that the nn's to a particle p are ordered
- around p in the computer memory according to, say, a Gaussian law. This
- implies a higher probability to find a nn close to p in the memory than far
- away in the memory.
- This is a problem in N-body methods where p interact with all other particles
- in a finite volume around p, where this volume depends on the distances to
- these nn's.
- I am doing this on a Connection Machine. With almost ordered I mean that it's
- possible to order the particles in the memory according to their spatial
- coordinates, but that it is not possible to do it exact.
-
- This is a description of my special problem. I am interested to hear or read
- posts from others on searching in structures.
-
- Magnus Selhammar
-
-
-
-
-