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Obvious Solution
"... •! Programmers are not perfect>! Write programs that perform outofbounds references>! All of these are questionable; some are malicious •! Technology for avoiding outofbounds references is easy>! Bounds check each reference>! 1970s compilers could insert such checks (PL/I) •! Code wi ..."
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with checking runs slowly>! Obvious opportunity for optimization>! We need compilers that implement this kind of checking!! Buffer overflow attacks & other subtle bugs •! PL.8 philosophy: check everything & optimize checks COMP 512, Spring 2009! 2! Obvious Solution Add a dynamic check to each
The Obvious Solution to Semantic Mapping – Ask an Expert
, 2011
"... Version 1.1 Abstract: The semantic mapping problem is probably the main obstacle to computertocomputer communication. If computer A knows that its concept X is the same as computer B’s concept Y, then the two machines can communicate. They will in effect be talking the same language. This paper de ..."
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Version 1.1 Abstract: The semantic mapping problem is probably the main obstacle to computertocomputer communication. If computer A knows that its concept X is the same as computer B’s concept Y, then the two machines can communicate. They will in effect be talking the same language. This paper describes a relatively straightforward way of enhancing the semantic descriptions of Web Service interfaces by using online sources of keyword definitions. Method interface descriptions can be enhanced using these standard dictionary definitions. Because the generated metadata is now standardised, this means that any other computer that has access to the same source, or understands standard language concepts, can now understand the description. This helps to remove a lot of the heterogeneity that would otherwise build up though humans creating their own descriptions independently of each other. The description comes in the form of an XML script that can be retrieved and read through the Web Service interface itself. An additional use for these scripts would be for adding descriptions in different languages, which would mean that human users that speak a different language would also understand what the service was about.
Hitting the Memory Wall: Implications of the Obvious
 Computer Architecture News
, 1995
"... This brief note points out something obvious something the authors "knew" without really understanding. With apologies to those who did understand, we offer it to those others who, like us, missed the point. We all know that the rate of improvement in microprocessor speed exceeds the ra ..."
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Cited by 385 (1 self)
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This brief note points out something obvious something the authors "knew" without really understanding. With apologies to those who did understand, we offer it to those others who, like us, missed the point. We all know that the rate of improvement in microprocessor speed exceeds
An obvious solution would be running S1 and S2 in parallel:
, 2006
"... Write a program that terminates if the total function f has a (positive or negative) zero proceeds indefinitely otherwise. Assume we have a program that looks for positive zeros: S1 = found: = false; x: = 0; while (not found) do x: = x+1; found: = (f(x) = 0) od Starting from the above, we can build ..."
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Write a program that terminates if the total function f has a (positive or negative) zero proceeds indefinitely otherwise. Assume we have a program that looks for positive zeros: S1 = found: = false; x: = 0; while (not found) do x: = x+1; found: = (f(x) = 0) od Starting from the above, we can build the program looking for negative zeros. S2 = found: = false; y: = 0; while (not found) do y: = y1; found: = (f(y) = 0) od
Gravity with Gravitas: a Solution to the Border Puzzle
, 2001
"... Gravity equations have been widely used to infer trade ow effects of various institutional arrangements. We show that estimated gravity equations do not have a theoretical foundation. This implies both that estimation suffers from omitted variables bias and that comparative statics analysis is unfo ..."
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Cited by 610 (3 self)
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Gravity equations have been widely used to infer trade ow effects of various institutional arrangements. We show that estimated gravity equations do not have a theoretical foundation. This implies both that estimation suffers from omitted variables bias and that comparative statics analysis is unfounded. We develop a method that (i) consistently and ef ciently estimates a theoretical gravity equation and (ii) correctly calculates the comparative statics of trade frictions. We apply the method to solve the famous McCallum border puzzle. Applying our method, we nd that national borders reduce trade between industrialized countries by moderate amounts of 20–50 percent.
For Most Large Underdetermined Systems of Linear Equations the Minimal ℓ1norm Solution is also the Sparsest Solution
 Comm. Pure Appl. Math
, 2004
"... We consider linear equations y = Φα where y is a given vector in R n, Φ is a given n by m matrix with n < m ≤ An, and we wish to solve for α ∈ R m. We suppose that the columns of Φ are normalized to unit ℓ 2 norm 1 and we place uniform measure on such Φ. We prove the existence of ρ = ρ(A) so that ..."
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Cited by 560 (10 self)
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that for large n, and for all Φ’s except a negligible fraction, the following property holds: For every y having a representation y = Φα0 by a coefficient vector α0 ∈ R m with fewer than ρ · n nonzeros, the solution α1 of the ℓ 1 minimization problem min �x�1 subject to Φα = y is unique and equal to α0
Mining Generalized Association Rules
, 1995
"... We introduce the problem of mining generalized association rules. Given a large database of transactions, where each transaction consists of a set of items, and a taxonomy (isa hierarchy) on the items, we find associations between items at any level of the taxonomy. For example, given a taxonomy th ..."
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Cited by 577 (7 self)
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that says that jackets isa outerwear isa clothes, we may infer a rule that "people who buy outerwear tend to buy shoes". This rule may hold even if rules that "people who buy jackets tend to buy shoes", and "people who buy clothes tend to buy shoes" do not hold. An obvious
Closedform solution of absolute orientation using unit quaternions
 J. Opt. Soc. Am. A
, 1987
"... Finding the relationship between two coordinate systems using pairs of measurements of the coordinates of a number of points in both systems is a classic photogrammetric task. It finds applications in stereophotogrammetry and in robotics. I present here a closedform solution to the leastsquares pr ..."
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Cited by 973 (4 self)
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Finding the relationship between two coordinate systems using pairs of measurements of the coordinates of a number of points in both systems is a classic photogrammetric task. It finds applications in stereophotogrammetry and in robotics. I present here a closedform solution to the least
A solution to Plato’s problem: The latent semantic analysis theory of acquisition, induction, and representation of knowledge
 PSYCHOLOGICAL REVIEW
, 1997
"... How do people know as much as they do with as little information as they get? The problem takes many forms; learning vocabulary from text is an especially dramatic and convenient case for research. A new general theory of acquired similarity and knowledge representation, latent semantic analysis (LS ..."
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Cited by 1772 (10 self)
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How do people know as much as they do with as little information as they get? The problem takes many forms; learning vocabulary from text is an especially dramatic and convenient case for research. A new general theory of acquired similarity and knowledge representation, latent semantic analysis (LSA), is presented and used to successfully simulate such learning and several other psycholinguistic phenomena. By inducing global knowledge indirectly from local cooccurrence data in a large body of representative text, LSA acquired knowledge about the full vocabulary of English at a comparable rate to schoolchildren. LSA uses no prior linguistic or perceptual similarity knowledge; it is based solely on a general mathematical learning method that achieves powerful inductive effects by extracting the right number of dimensions (e.g., 300) to represent objects and contexts. Relations to other theories, phenomena, and problems are sketched.
Symmetry and Related Properties via the Maximum Principle
, 1979
"... We prove symmetry, and some related properties, of positive solutions of second order elliptic equations. Our methods employ various forms of the maximum principle, and a device of moving parallel planes to a critical position, and then showing that the solution is symmetric about the limiting plan ..."
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Cited by 539 (4 self)
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We prove symmetry, and some related properties, of positive solutions of second order elliptic equations. Our methods employ various forms of the maximum principle, and a device of moving parallel planes to a critical position, and then showing that the solution is symmetric about the limiting
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