1,439 research outputs found
Bose-Einstein Condensates with Large Number of Vortices
We show that as the number of vortices in a three dimensional Bose-Einstein
Condensate increases, the system reaches a "quantum Hall" regime where the
density profile is a Gaussian in the xy-plane and an inverted parabolic profile
along z. The angular momentum of the system increases as the vortex lattice
shrinks. However, Coriolis force prevents the unit cell of the vortex lattice
from shrinking beyond a minimum size. Although the recent MIT experiment is not
exactly in the quantum Hall regime, it is close enough for the present results
to be used as a guide. The quantum Hall regime can be easily reached by
moderate changes of the current experimental parameters.Comment: 4 pages, no figure
Criterion for bosonic superfluidity in an optical lattice
We show that the current method of determining superfluidity in optical
lattices based on a visibly sharp bosonic momentum distribution
can be misleading, for even a normal Bose gas can have a similarly sharp
. We show that superfluidity in a homogeneous system can be
detected from the so-called visibility of that must
be 1 within , where is the number of bosons. We also show that
the T=0 visibility of trapped lattice bosons is far higher than what is
obtained in some current experiments, suggesting strong temperature effects and
that these states can be normal. These normal states allow one to explore the
physics in the quantum critical region.Comment: 4 pages, 2 figures; published versio
Two-component Bose-Einstein Condensates with Large Number of Vortices
We consider the condensate wavefunction of a rapidly rotating two-component
Bose gas with an equal number of particles in each component. If the
interactions between like and unlike species are very similar (as occurs for
two hyperfine states of Rb or Na) we find that the two components
contain identical rectangular vortex lattices, where the unit cell has an
aspect ratio of , and one lattice is displaced to the center of the
unit cell of the other. Our results are based on an exact evaluation of the
vortex lattice energy in the large angular momentum (or quantum Hall) regime.Comment: 4 pages, 2 figures, RevTe
Determinants of active aging and quality of life among older adults : systematic review
Peer reviewedPublisher PD
Pengaruh Kepemimpinan, Motivasi dan Disiplin Kerja Terhadap Kinerja Guru SMP Negeri di Kabupaten Minahasa Tenggara
Teacher performance is very important for achieving educational goals. This research was conducted with the aim of assessing the influence or impact of leadership, motivation, and work discipline on the performance of state junior high school teachers in Southeast Minahasa Regency. The quantitative method was used by taking a sample of 80 public junior high school teachers from a total population of 398 teachers. Multiple linear regression analysis was performed using SPSS 25. The results showed that leadership had no effect on teacher performance. Meanwhile, work motivation and discipline have a significant positive effect on teacher performance. This finding confirms the importance of increasing the motivation and work discipline of teachers to improve their performance in the research area.Kinerja guru sangat penting demi tercapainya tujuan pendidikan. Penelitian ini dilakukan dengan tujuan menilai pengaruh atau dampak kepemimpinan, motivasi, dan disiplin kerja terhadap kinerja guru SMP Negeri di Kabupaten Minahasa Tenggara. Metode kuantitatif digunakan dengan mengambil sampel dari 80 guru SMP Negeri dari total populasi 398 guru. Analisis regresi linear berganda dilakukan dengan SPSS 25. Hasil penelitian menunjukkan bahwa kepemimpinan tidak berpengaruh terhadap kinerja guru. Sedangkan motivasi dan disiplin kerja memiliki pengaruh positif yang signifikan terhadap kinerja guru. Temuan ini menegaskan pentingnya meningkatkan motivasi dan disiplin kerja guru untuk meningkatkan kinerja mereka di wilayah penelitian
Addressing Rogue Vehicles by Integrating Computer Vision, Activity Monitoring, and Contextual Information
In this paper, we address the detection of rogue autonomous vehicles using an integrated approach involving computer vision, activity monitoring and contextual information. The proposed approach can be used to detect rogue autonomous vehicles using sensors installed on observer vehicles that are used to monitor and identify the behavior of other autonomous vehicles operating on the road. The safe braking distance and the safe following time are computed to identify if an autonomous vehicle is behaving properly. Our preliminary results show that there is a wide variation in both the safe following time and the safe braking distance recorded using three autonomous vehicles in a test-bed. These initial results show significant progress for the future efforts to coordinate the operation of autonomous, semi-autonomous and non-autonomous vehicles
Are you using test log-likelihood correctly?
Test log-likelihood is commonly used to compare different models of the same
data or different approximate inference algorithms for fitting the same
probabilistic model. We present simple examples demonstrating how comparisons
based on test log-likelihood can contradict comparisons according to other
objectives. Specifically, our examples show that (i) approximate Bayesian
inference algorithms that attain higher test log-likelihoods need not also
yield more accurate posterior approximations and (ii) conclusions about
forecast accuracy based on test log-likelihood comparisons may not agree with
conclusions based on root mean squared error.Comment: Presented at the ICBINB Workshop at NeurIPS 202
ASGS: an alternative splicing graph web service
Alternative transcript diversity manifests itself a prime cause of complexity in higher eukaryotes. The Alternative Splicing Graph Server (ASGS) is a web service facilitating the systematic study of alternatively spliced genes of higher eukaryotes by generating splicing graphs for the compact visual representation of transcript diversity from a single gene. Taking a set of transcripts in General Feature Format as input, ASGS identifies distinct reference and variable exons, generates a transcript splicing graph, an exon summary, splicing events classification and a single line graph to facilitate experimental analysis. This freely available web service can be accessed at
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