1,105,410 research outputs found
Reconciliation of object interaction models
This paper presents Reconciliation+, a
tool-supported method which identifies overlaps
between models of different object interactions
expressed as UML sequence and/or collaboration
diagrams, checks whether the overlapping elements
of these models satisfy specific consistency rules,
and guides developers in handling these
inconsistencies. The method also keeps track of the
decisions made and the actions taken in the process
of managing inconsistencies
Construction of Latent Descriptor Space and Inference Model of Hand-Object Interactions
Appearance-based generic object recognition is a challenging problem because
all possible appearances of objects cannot be registered, especially as new
objects are produced every day. Function of objects, however, has a
comparatively small number of prototypes. Therefore, function-based
classification of new objects could be a valuable tool for generic object
recognition. Object functions are closely related to hand-object interactions
during handling of a functional object; i.e., how the hand approaches the
object, which parts of the object and contact the hand, and the shape of the
hand during interaction. Hand-object interactions are helpful for modeling
object functions. However, it is difficult to assign discrete labels to
interactions because an object shape and grasping hand-postures intrinsically
have continuous variations. To describe these interactions, we propose the
interaction descriptor space which is acquired from unlabeled appearances of
human hand-object interactions. By using interaction descriptors, we can
numerically describe the relation between an object's appearance and its
possible interaction with the hand. The model infers the quantitative state of
the interaction from the object image alone. It also identifies the parts of
objects designed for hand interactions such as grips and handles. We
demonstrate that the proposed method can unsupervisedly generate interaction
descriptors that make clusters corresponding to interaction types. And also we
demonstrate that the model can infer possible hand-object interactions
Interaction-free measurement with an imperfect absorber
In this paper, we consider interaction-free measurement (IFM) with imperfect
interaction. In the IFM proposed by Kwiat et al., we assume that interaction
between an absorbing object and a probe photon is imperfect, so that the photon
is absorbed with probability 1-\eta (0\leq\eta\leq 1) and it passes by the
object without being absorbed with probability \eta when it approaches close to
the object. We derive the success probability P that we can find the object
without the photon absorbed under the imperfect interaction as a power series
in 1/N, and show the following result: Even if the interaction between the
object and the photon is imperfect, we can let the success probability P of the
IFM get close to unity arbitrarily by making the reflectivity of the beam
splitter larger and increasing the number of the beam splitters. Moreover, we
obtain an approximating equation of P for large N from the derived power series
in 1/N.Comment: 6 pages, 3 eps figures, latex2e; v2: minor corrections; v3: the title
is change
Controlling Quantum State Reduction
Every measurement leaves the object in a family of states indexed by the
possible outcomes. This family, called the posterior states, is usually a
family of the eigenstates of the measured observable, but it can be an
arbitrary family of states by controlling the object-apparatus interaction. A
potentially realizable object-apparatus interaction measures position in such a
way that the posterior states are the translations of an arbitrary wave
function. In particular, position can be measured without perturbing the object
in a momentum eigenstate.Comment: 9 pages, REVTe
"Interaction-Free" Imaging
Using the complementary wave- and particle-like natures of photons, it is
possible to make ``interaction-free'' measurements where the presence of an
object can be determined with no photons being absorbed. We investigated
several ``interaction-free'' imaging systems, i.e. systems that allow optical
imaging of photosensitive objects with less than the classically expected
amount of light being absorbed or scattered by the object. With the most
promising system, we obtained high-resolution (10 \mu m), one-dimensional
profiles of a variety of objects (human hair, glass and metal wires, cloth
fibers), by raster scanning each object through the system. We discuss possible
applications and the present and future limits for interaction-free imaging.Comment: 10 pages, 6 encapsulated Postscript figure files, accepted for
publication in Physical Review
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