846 research outputs found
A Gravity Dual and LHC Study of Single-Sector Supersymmetry Breaking
We propose a gravitational dual of ``single-sector'' models of supersymmetry
breaking which contain no messenger sector and naturally explain the scale of
supersymmetry breaking and the fermion mass hierarchy. In five dimensions these
models can be given a simple interpretation. Inspired by flux-background
solutions of type IIB supergravity, a metric background that deviates from
AdS_5 in the IR breaks supersymmetry, while the fermion mass hierarchy results
from the wavefunction overlap of bulk fermions with a UV-confined Higgs field.
The first and second generation squarks and sleptons, which are localized near
the IR brane, directly feel the supersymmetry breaking and obtain masses of
order 10 TeV. These are interpreted as composite states of the dual 4D theory.
The gauginos and third generation squarks and sleptons are elementary states
that obtain soft masses of order 1 TeV at the loop level via direct gauge
mediation. This particle spectrum leads to distinctive signatures at the LHC,
similar to the usual gauge mediation with a neutralino NLSP that decays
promptly to a gravitino LSP, but with lower event rates. Nevertheless we show
that with 1-10 fb^{-1} of LHC data "single-sector" models can easily be
detected above background and distinguished from conventional gravity and gauge
mediation.Comment: 35 pages, 6 figures, LaTe
Implementing Learning Principles with a Personal AI Tutor: A Case Study
Effective learning strategies based on principles like personalization,
retrieval practice, and spaced repetition are often challenging to implement
due to practical constraints. Here we explore the integration of AI tutors to
complement learning programs in accordance with learning sciences. A
semester-long study was conducted at UniDistance Suisse, where an AI tutor app
was provided to psychology students taking a neuroscience course (N=51). After
automatically generating microlearning questions from existing course materials
using GPT-3, the AI tutor developed a dynamic neural-network model of each
student's grasp of key concepts. This enabled the implementation of distributed
retrieval practice, personalized to each student's individual level and
abilities. The results indicate that students who actively engaged with the AI
tutor achieved significantly higher grades. Moreover, active engagement led to
an average improvement of up to 15 percentile points compared to a parallel
course without AI tutor. Additionally, the grasp strongly correlated with the
exam grade, thus validating the relevance of neural-network predictions. This
research demonstrates the ability of personal AI tutors to model human learning
processes and effectively enhance academic performance. By integrating AI
tutors into their programs, educators can offer students personalized learning
experiences grounded in the principles of learning sciences, thereby addressing
the challenges associated with implementing effective learning strategies.
These findings contribute to the growing body of knowledge on the
transformative potential of AI in education.Comment: 17 pages, 7 figure
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