1,309 research outputs found
Universal property of the information entropy in fermionic and bosonic systems
It is shown that a similar functional form holds approximately
for the information entropy S as function of the number of particles N for
atoms, nuclei and atomic clusters (fermionic systems) and correlated
boson-atoms in a trap (bosonic systems). It is also seen that rigorous
inequalities previously found to hold between S and the kinetic energy T for
fermionic systems, hold for bosonic systems as well. It is found that
Landsberg's order parameter is an increasing function of N for the
above systems. It is conjectured that the above properties are universal i.e.
they do not depend on the kind of constituent particles (fermions or correlated
bosons) and the size of the system.Comment: 6 pages, 2 EPS figures, LaTe
The effect of continuous, nonlinearly transformed visual feedback on rapid aiming movements
We investigated the ability to adjust to nonlinear transformations that allow people to control external systems like machines and tools. Earlier research (Verwey and Heuer 2007) showed that in the presence of just terminal feedback participants develop an internal model of such transformations that operates at a relatively early processing level (before or at amplitude specification). In this study, we investigated the level of operation of the internal model after practicing with continuous visual feedback. Participants executed rapid aiming movements, for which a nonlinear relationship existed between the target amplitude seen on the computer screen and the required movement amplitude of the hand on a digitizing tablet. Participants adjusted to the external transformation by developing an internal model. Despite continuous feedback, explicit awareness of the transformation did not develop and the internal model still operated at the same early processing level as with terminal feedback. Thus with rapid aiming movements, the type of feedback may not matter for the locus of operation of the internal model
Preferential attachment during the evolution of a potential energy landscape
It has previously been shown that the network of connected minima on a
potential energy landscape is scale-free, and that this reflects a power-law
distribution for the areas of the basins of attraction surrounding the minima.
Here, we set out to understand more about the physical origins of these
puzzling properties by examining how the potential energy landscape of a
13-atom cluster evolves with the range of the potential. In particular, on
decreasing the range of the potential the number of stationary points increases
and thus the landscape becomes rougher and the network gets larger. Thus, we
are able to follow the evolution of the potential energy landscape from one
with just a single minimum to a complex landscape with many minima and a
scale-free pattern of connections. We find that during this growth process, new
edges in the network of connected minima preferentially attach to more
highly-connected minima, thus leading to the scale-free character. Furthermore,
minima that appear when the range of the potential is shorter and the network
is larger have smaller basins of attraction. As there are many of these smaller
basins because the network grows exponentially, the observed growth process
thus also gives rise to a power-law distribution for the hyperareas of the
basins.Comment: 10 pages, 10 figure
Quantum-Information Theoretic Properties of Nuclei and Trapped Bose Gases
Fermionic (atomic nuclei) and bosonic (correlated atoms in a trap) systems
are studied from an information-theoretic point of view. Shannon and Onicescu
information measures are calculated for the above systems comparing correlated
and uncorrelated cases as functions of the strength of short range
correlations. One-body and two-body density and momentum distributions are
employed. Thus the effect of short-range correlations on the information
content is evaluated. The magnitude of distinguishability of the correlated and
uncorrelated densities is also discussed employing suitable measures of
distance of states i.e. the well known Kullback-Leibler relative entropy and
the recently proposed Jensen-Shannon divergence entropy. It is seen that the
same information-theoretic properties hold for quantum many-body systems
obeying different statistics (fermions and bosons).Comment: 24 pages, 9 figures, 1 tabl
Addressing Diversity In Medical Laboratory Science Education: Perceptions And Practices
Multicultural Education and Culturally Responsive Teaching methods have been available to assist educators in addressing diversity for a long time. However, the literature fails to address how diversity is being incorporated in laboratory science educational programs. The purpose of this study was to better understand Medical Laboratory Science (MLS) and Medical Laboratory Technician (MLT) educators’ perceptions and practices. To understand what diversity in MLS and MLT education looks like, the following research questions were identified:
1. What are MLS and MLT instructors’ perceived levels of importance for addressing the needs of an increasingly diverse student population?
2. How do MLS and MLT educators develop their understanding of cultural diversity?
3. How do MLS and MLT educators define and/or implement culturally relevant pedagogy?
4. How do MLS and MLT educators prepare their students to communicate with culturally diverse patients and members of the health care team?
In response to the research questions, the participants of this study asserted that addressing the needs of all students was important. The participants and related textbooks described many methods for addressing diversity in the classroom. However, most the participants felt that more could be done to prepare MLS and MLT students to work in a diverse workforce and interact with a diverse patient population. Therefore, there is critical need to develop resources that can assist laboratory science educators as they work to improve multicultural competence and effective communication skills in MLS and MLT professionals which will ultimately contribute to a stronger laboratory workforce and the betterment of healthcare
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