267 research outputs found
Color Intensity Projections: A simple way to display changes in astronomical images
To detect changes in repeated astronomical images of the same field of view
(FOV), a common practice is to stroboscopically switch between the images.
Using this method, objects that are changing in location or intensity between
images are easier to see because they are constantly changing. A novel display
method, called arrival time color intensity projections (CIPs), is presented
that combines any number of grayscale images into a single color image on a
pixel by pixel basis. Any values that are unchanged over the grayscale images
look the same in the color image. However, pixels that change over the
grayscale image have a color saturation that increases with the amount of
change and a hue that corresponds to the timing of the changes. Thus objects
moving in the grayscale images change from red to green to blue as they move
across the color image. Consequently, moving objects are easier to detect and
assess on the color image than on the grayscale images. A sequence of images of
a comet plunging into the sun taken by the SOHO satellite (NASA/ESA) and Hubble
Space Telescope images of a trans-Neptunian object (TNO) are used to
demonstrate the method.Comment: 9 pages, 2 figures. Accepted for publication in Publications of the
Astronomical Society of the Pacific. The quality of figure 1 been improved
from the previous posted versio
Stochastic Matrix Product States
The concept of stochastic matrix product states is introduced and a natural
form for the states is derived. This allows to define the analogue of Schmidt
coefficients for steady states of non-equilibrium stochastic processes. We
discuss a new measure for correlations which is analogous to the entanglement
entropy, the entropy cost , and show that this measure quantifies the bond
dimension needed to represent a steady state as a matrix product state. We
illustrate these concepts on the hand of the asymmetric exclusion process
Quantum entanglement theory in the presence of superselection rules
Superselection rules severly constrain the operations which can be
implemented on a distributed quantum system. While the restriction to local
operations and classical communication gives rise to entanglement as a nonlocal
resource, particle number conservation additionally confines the possible
operations and should give rise to a new resource. In [Phys. Rev. Lett. 92,
087904 (2004), quant-ph/0310124] we showed that this resource can be quantified
by a single additional number, the superselection induced variance (SiV)
without changing the concept of entanglement. In this paper, we give the
results on pure states in greater detail; additionally, we provide a discussion
of mixed state nonlocality with superselection rules where we consider both
formation and distillation. Finally, we demonstrate that SiV is indeed a
resource, i.e., that it captures how well a state can be used to overcome the
restrictions imposed by the superselection rule.Comment: 16 pages, 5 figure
A simple derivation and classification of common probability distributions based on information symmetry and measurement scale
Commonly observed patterns typically follow a few distinct families of
probability distributions. Over one hundred years ago, Karl Pearson provided a
systematic derivation and classification of the common continuous
distributions. His approach was phenomenological: a differential equation that
generated common distributions without any underlying conceptual basis for why
common distributions have particular forms and what explains the familial
relations. Pearson's system and its descendants remain the most popular
systematic classification of probability distributions. Here, we unify the
disparate forms of common distributions into a single system based on two
meaningful and justifiable propositions. First, distributions follow maximum
entropy subject to constraints, where maximum entropy is equivalent to minimum
information. Second, different problems associate magnitude to information in
different ways, an association we describe in terms of the relation between
information invariance and measurement scale. Our framework relates the
different continuous probability distributions through the variations in
measurement scale that change each family of maximum entropy distributions into
a distinct family.Comment: 17 pages, 0 figure
Campus Vol V N 1
Rounds, Dave. Cover. Picture. 0.; Rounds, Dave. Untitled. Picture. 2.
Olwin, Lynn. homecoming . Prose. 4.; Trimble, John. To Denison . Picture. 6.
Cover, Frank. A Remembrance of Things Past. Or, Gee, I\u27d Give the World to See That Ol\u27 Gang of Mine . Prose. 8.
Opteker, Pat. New Boy . Prose. 10.
Gould, Jim. Untitled. Prose. 11.
Rounds, Dave. Untitled. Cartoon. 11.
Yearling, Joe. Pigskin greats of Yesteryear . Prose. 14.
Gould, Jim. Untitled. Prose. 16.
Gould, Jim. Freshman Foto Quiz . Picture. 18.
Hawk, Pete. Home Was Never Like This . 20.
Pierson, Pete. Homecoming 1950 . cartoon. 12.
Pierson, Pete. A View of the Campus . Cartoon. 23
High resolution quantization and entropy coding of jump processes
We study the quantization problem for certain types of jump processes. The
probabilities for the number of jumps are assumed to be bounded by Poisson
weights. Otherwise, jump positions and increments can be rather generally
distributed and correlated. We show in particular that in many cases entropy
coding error and quantization error have distinct rates. Finally, we
investigate the quantization problem for the special case of
-valued compound Poisson processes.Comment: Preprint (submitted), 34 page
Mix 'n Match: Integrating Text Matching and Product Substitutability within Product Search
Two products are substitutes if both can satisfy the same consumer need. Intrinsic incorporation of product substitutability - where substitutability is integrated within latent vector space models - is in contrast to the extrinsic re-ranking of result lists. The fusion of text matching and product substitutability objectives allows latent vector space models to mix and match regularities contained within text descriptions and substitution relations. We introduce a method for intrinsically incorporating product substitutability within latent vector space models for product search that are estimated using gradient descent; it integrates flawlessly with state-of-the-art vector space models. We compare our method to existing methods for incorporating structural entity relations, where product substitutability is incorporated extrinsically by re-ranking. Our method outperforms the best extrinsic method on four benchmarks. We investigate the effect of different levels of text matching and product similarity objectives, and provide an analysis of the effect of incorporating product substitutability on product search ranking diversity. Incorporating product substitutability information improves search relevance at the cost of diversity
Campus Vol IV N 3
Hawk, Bob. Adventures of a Private Eye . Prose. 3.
Gillies, Jean. The Fine Arts . Prose. 4.
Hauser, Bill. After Hours Almanac . Prose. 5.
Chase, Dick. Admirals of the Inland Lake . Prose. 6.
Runkle, Pete. They Float Through the Air With the Greatest . Prose. 8.
Barton, Rusty. Threads For the Female . Prose. 10.
Crocker, Larry. Innocents Abroad . Prose. 11.
Wilson, Bob. The Drums of Port Au Prince . Prose. 12.
Johnston, Ed. Threads For the Male . Prose. 14.
Kreuger, Ben. Column For Contributors . 15.
Rounds, Dave. Untitled. Cartoon. 21.
Taggart, Marilou. Nightmare . Poem. 22.
Thompson, Rolan. Cover. Picture. 0.
Cover, Frank and John Trimble. Campus Congratulates Emotion . Picture. 2.
Rees, Tom. Our March Pin-Up Girl . Picture. 7.
Rees, Tom. They Fly Through the Air With the Greatest . Picture. 8.
McGlone, Joe and Tom Rees. Threads for Females . Picture. 10
Natural Law and Vengeance:Jurisprudence on the Streets of Gotham
Batman is allied with modern natural law in the way he relies upon reason to bring about his vision of ‘true justice’, operating as a force external to law. This vision of justice is a protective one, with Batman existing as a guardian—a force for resistance against the corruption of the state and the failures of the legal system. But alongside his rational means, Batman also employs violence as he moves beyond the boundaries of the civilised state into the dark and violent world outside law’s protection. He thus sacrifices his own safety to ensure the safety of others—he is a Dark Knight, a sentinel, fighting the nasty and brutish underworld of criminality in his effort to bring rational order to the world and protect the people of Gotham from criminal harm. This fight for justice is fuelled by a deeply private trauma: the murder of Bruce Wayne’s parents: a private desire for vengeance that Batman transcends. In navigating Batman’s jurisprudential dimensions, we are ultimately reminded that private desires and motivations are enfolded within the public structures of justice
- …