19,533 research outputs found
Fostering Student Agency to Build a Whole Child, Whole School, Whole Community Approach
In this practitioner perspective, we explore the concept of student agency through the implementation of a student government association in a laboratory middle school. Interviews with a social studies teacher and her students offer perspectives of the impact of student voice and choice for student experiences. We describe three major lessons learned through this implementation process: students learn to have healthy conflict and cooperative skills; students learn the appropriate processes to enact change in a democratic society; and students learn to conduct service for their peers, school, and community
Archiving Revolution: Historical Records Management in the Massachusetts Courts
The lengthy history of the Massachusetts courts and their establishment as courts of record means that their records of proceedings contain a wealth of information about the development and growth of the colony as part of a nascent United States. Although Massachusetts’ courts are much older than the Federal Court of Australia, they have confronted similar issues in terms of records retention and the vexed question of what constitutes a ‘significant’ record that requires permanent retention. However, through a process of determining historical context, sampling and inspection, the Supreme Judicial Court found that a definition of ‘significance’ was largely unnecessary. This chapter provides an overview of the origins of the Superior Courts’ approach. It suggests that there are elements of the Massachusetts courts’ experience in the development, implementation and maintenance of court records may be valuable in approaching similar superior courts’ collections in Australia
Control Of Flexible Structures-2 (COFS-2) flight control, structure and gimbal system interaction study
The second Control Of Flexible Structures Flight Experiment (COFS-2) includes a long mast as in the first flight experiment, but with the Langley 15-m hoop column antenna attached via a gimbal system to the top of the mast. The mast is to be mounted in the Space Shuttle cargo bay. The servo-driven gimbal system could be used to point the antenna relative to the mast. The dynamic interaction of the Shuttle Orbiter/COFS-2 system with the Orbiter on-orbit Flight Control System (FCS) and the gimbal pointing control system has been studied using analysis and simulation. The Orbiter pointing requirements have been assessed for their impact on allowable free drift time for COFS experiments. Three fixed antenna configurations were investigated. Also simulated was Orbiter attitude control behavior with active vernier jets during antenna slewing. The effect of experiment mast dampers was included. Control system stability and performance and loads on various portions of the COFS-2 structure were investigated. The study indicates possible undesirable interaction between the Orbiter FCS and the flexible, articulated COFS-2 mast/antenna system, even when restricted to vernier reaction jets
Comparison of enrollees and decliners of Parkinson disease sham surgery trials
Concerns have been raised that persons with serious illnesses participating in high‐risk research, such as PD patients in sham surgery trials, have unrealistic expectations and are vulnerable to exploitation. A comparison of enrollees and decliners of such research may provide insights about the adequacy of decision making by potential subjects. We compared 61 enrollees and 10 decliners of two phase II neurosurgical intervention (i.e., cellular and gene transfer) trials for PD regarding their demographic and clinical status, perceptions and attitudes regarding research risks, potential direct benefit, and societal benefit, and perspectives on the various potential reasons for and against participation. In addition to bivariate analyses, a logistic regression model examined variables regarding risks and benefits as predictors of participation status. Enrollees perceived lower risk of harm while tolerating higher risk of harm and were more action oriented, but did not have more advanced disease. Both groups rated hope for benefit as a strong reason to participate, whereas the fact that the study's purpose was not solely to benefit them was rated as “not a reason” against participation. Hope for benefit and altruism were rated higher than expectation of benefit as reasons in favor of participation for both groups. Enrollees and decliners are different in their views and attitudes toward risk. Although both are attracted to research because of hopes of personal benefit, this hope is clearly distinguishable from an expectation of benefit and does not imply a failure to understand the main purpose of research. © 2012 Movement Disorder SocietyPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90524/1/24940_ftp.pd
The use of discriminative belief tracking in POMDP-based dialogue systems
Statistical spoken dialogue systems based on Partially Ob-servable Markov Decision Processes (POMDPs) have been shown to be more robust to speech recognition errors by main-taining a belief distribution over multiple dialogue states and making policy decisions based on the entire distribution rather than the single most likely hypothesis. To date most POMDP-based systems have used generative trackers. However, con-cerns about modelling accuracy have created interest in dis-criminative methods, and recent results from the second Dia-log State Tracking Challenge (DSTC2) have shown that dis-criminative trackers can significantly outperform generative models in terms of tracking accuracy. The aim of this pa-per is to investigate the extent to which these improvements translate into improved task completion rates when incorpo-rated into a spoken dialogue system. To do this, the Recur-rent Neural Network (RNN) tracker described by Henderson et al in DSTC2 was integrated into the Cambridge statistical dialogue system and compared with the existing generative Bayesian network tracker. Using a Gaussian Process (GP) based policy, the experimental results indicate that the system using the RNN tracker performs significantly better than the system with the original Bayesian network tracker. Index Terms — dialogue management, spoken dialogue systems, recurrent neural networks, belief tracking, POMDP 1
KMT-2016-BLG-2052L: Microlensing Binary Composed of M Dwarfs Revealed from a Very Long Time-scale Event
We present the analysis of a binary microlensing event KMT-2016-BLG-2052, for
which the lensing-induced brightening of the source star lasted for 2 seasons.
We determine the lens mass from the combined measurements of the microlens
parallax \pie and angular Einstein radius \thetae. The measured mass
indicates that the lens is a binary composed of M dwarfs with masses of
and . The measured relative
lens-source proper motion of is smaller
than of typical Galactic lensing events, while
the estimated angular Einstein radius of \thetae\sim 1.2~{\rm mas} is
substantially greater than the typical value of .
Therefore, it turns out that the long time scale of the event is caused by the
combination of the slow and large \thetae rather than the heavy mass of
the lens. From the simulation of Galactic lensing events with very long time
scales ( days), we find that the probabilities that long
time-scale events are produced by lenses with masses and
are and 2.6\%, respectively, indicating that
events produced by heavy lenses comprise a minor fraction of long time-scale
events. The results indicate that it is essential to determine lens masses by
measuring both \pie and \thetae in order to firmly identify heavy stellar
remnants such as neutron stars and black holes.Comment: 9 pages, 11 figure
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