4,335,122 research outputs found
Content-based Video Retrieval by Integrating Spatio-Temporal and Stochastic Recognition of Events
As amounts of publicly available video data grow the need to query this data efficiently becomes significant. Consequently content-based retrieval of video data turns out to be a challenging and important problem. We address the specific aspect of inferring semantics automatically from raw video data. In particular, we introduce a new video data model that supports the integrated use of two different approaches for mapping low-level features to high-level concepts. Firstly, the model is extended with a rule-based approach that supports spatio-temporal formalization of high-level concepts, and then with a stochastic approach. Furthermore, results on real tennis video data are presented, demonstrating the validity of both approaches, as well us advantages of their integrated us
ANALISIS CLUSTERING DENGAN K-MEANS UNTUK PENGELOMPOKKAN PENJUALAN PRODUK PADA HOTEL NEWTON
Customer satisfaction is the main goal of many companies wants to achieve. One of the business fields that focus on customer satisfaction is hotel business. Apart from serving accommodation for customers, hotels also provide variety of products for sale. Inventory management is very important is hotel business because one of many ways to maintain customer satisfaction is by keeping stock so no items are empty when needed. In addition, a good inventory management will not let the company to experiences losses due to outdated inventory. Using data mining K-means clustering algorithm, we can group goods based on the salable goods and the less salable goods. This research aims to assist hotel Newton to improve their inventory management. Data that was used is sales that have been made which divided into 3 trimesters. Data also will be evaluated using RapidMiner application. The results obtained from the research are 3 clusters where the clusters consist of very salable goods, medium salable goods and not salable goods
First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass
In this paper we quantify the temporal variability and image morphology of
the horizon-scale emission from Sgr A*, as observed by the EHT in 2017 April at
a wavelength of 1.3 mm. We find that the Sgr A* data exhibit variability that
exceeds what can be explained by the uncertainties in the data or by the
effects of interstellar scattering. The magnitude of this variability can be a
substantial fraction of the correlated flux density, reaching 100\% on
some baselines. Through an exploration of simple geometric source models, we
demonstrate that ring-like morphologies provide better fits to the Sgr A* data
than do other morphologies with comparable complexity. We develop two
strategies for fitting static geometric ring models to the time-variable Sgr A*
data; one strategy fits models to short segments of data over which the source
is static and averages these independent fits, while the other fits models to
the full dataset using a parametric model for the structural variability power
spectrum around the average source structure. Both geometric modeling and
image-domain feature extraction techniques determine the ring diameter to be
as (68\% credible intervals), with the ring thickness
constrained to have an FWHM between 30\% and 50\% of the ring diameter.
To bring the diameter measurements to a common physical scale, we calibrate
them using synthetic data generated from GRMHD simulations. This calibration
constrains the angular size of the gravitational radius to be
\mathrm{\mu as}, which we combine with an independent
distance measurement from maser parallaxes to determine the mass of Sgr A* to
be M.Comment: 65 pages, 35 figures, published in The Astrophysical Journal Letters
on May 12, 2022. See the published paper for the full authors lis
Improvising with the threnoscope: integrating code, hardware, GUI, network, and graphic scores
Live coding emphasises improvisation. It is an art practice that merges the act of musical composition and performance into a public act of projected writing. This paper introduces the Threnoscope system, which includes a live coding micro-language for drone-based microtonal composition. The paper discusses the aims and objectives of the system, elucidates the design decisions, and introduces in particular the code score feature present in the Threnoscope. The code score is a novel element in the design of live coding systems allowing for improvisation through a graphic score, rendering a visual representation of past and future events in a real-time performance. The paper demonstrates how the systemâs methods can be mapped ad hoc to GUI- or hardware-based control
Extracting Event Dynamics from Event-by-Event Analysis
The problem of eliminating the statistical fluctuations and extracting the
event dynamics from event-by-event analysis is discussed. New moments
(for continuous distribution), and (for anomalous distribution) are
proposed, which are experimentally measurable and can eliminate the Poissonian
type statistical fluctuations to recover the dynamical moments and
. In this way, the dynamical distribution of the event-averaged
transverse momentum \bar{\pt} can be extracted, and the anomalous scaling of
dynamical distribution, if exists, can be recovered, through event-by-event
analysis of experimental data.Comment: 15 pages, 2 eps figures, Phys. Rev. C accepte
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