30 research outputs found
A Computing and Detector Simulation Framework for the HIBEAM/NNBAR Experimental Program at the ESS
The HIBEAM/NNBAR program is a proposed two-stage experiment at the European
Spallation Source focusing on searches for baryon number violation via
processes in which neutrons convert to antineutrons. This paper outlines the
computing and detector simulation framework for the HIBEAM/NNBAR program. The
simulation is based on predictions of neutron flux and neutronics together with
signal and background generation. A range of diverse simulation packages are
incorporated, including Monte Carlo transport codes, neutron ray-tracing
simulation packages, and detector simulation software. The common simulation
package in which these elements are interfaced together is discussed. Data
management plans and triggers are also described.Comment: Contribution to CHEP2021. Accepted for publication in the European
Physical Journal (EPJ) Web of Conference
A tutorial for olfaction-based multisensorial media application design and evaluation
© ACM, 2017. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in PUBLICATION, {VOL50, ISS5, September 2017} https://doi.org/10.1145/310824
Development of a High Intensity Neutron Source at the European Spallation Source: The HighNESS project
The European Spallation Source (ESS), presently under construction in Lund,
Sweden, is a multidisciplinary international laboratory that will operate the
world's most powerful pulsed neutron source. Supported by a 3M Euro Research
and Innovation Action within the EU Horizon 2020 program, a design study
(HighNESS) is now underway to develop a second neutron source below the
spallation target. Compared to the first source, located above the spallation
target and designed for high cold and thermal brightness, the new source will
provide higher intensity, and a shift to longer wavelengths in the spectral
regions of cold (2 /- 20 {\AA}), very cold (VCN, 10 /- 120 {\AA}), and ultra
cold (UCN, > 500 {\AA}) neutrons. The core of the second source will consist of
a large liquid deuterium moderator to deliver a high flux of cold neutrons and
to serve secondary VCN and UCN sources, for which different options are under
study. The features of these new sources will boost several areas of condensed
matter research and will provide unique opportunities in fundamental physics.
Part of the HighNESS project is also dedicated to the development of future
instruments that will make use of the new source and will complement the
initial suite of instruments in construction at ESS. The HighNESS project
started in October 2020. In this paper, the ongoing developments and the
results obtained in the first year are described.Comment: 10 pages, 10 figures, 14th International Topical Meeting on Nuclear
Applications of Accelerators, November 30 to December 4, 2021, Washington, D
The Development of the NNBAR Experiment
The NNBAR experiment for the European Spallation Source will search for free
neutrons converting to antineutrons with a sensitivity improvement of three
orders of magnitude compared to the last such search. This paper describes
progress towards a conceptual design report for NNBAR. The design of a
moderator, neutron reflector, beamline, shielding and annihilation detector is
reported. The simulations used form part of a model which will be used for
optimisation of the experiment design and quantification of its sensitivity.Comment: 30 pages, 26 figures, accepted for publication in Journal of
Instrumentation (JINST
Pastorale begeleiding aan die persoon met Dissosiatiewe Identiteitsversteuring
A person with Dissociative Identity Disorder (DID) is someone who was exposed to intense trauma impacting that person’s life negatively at various levels. Although dissociative identity disorder is described as a mental disorder in the DSM-IV, there are still unresolved issues regarding the phenomenon. Assistance should take place with care and sensitivity in order to guide the person with dissociative identity disorder taking into consideration integral dimensions of personal humanity. It is submitted that guidance in this respect can therefore not be unilaterally psychological or pastoral by nature. Effective assistance to the person implies an approach where different disciplines are part of a multidisciplinary support team. The question this article explores is how pastoral counselling may contribute to this approach in guidance of the person with dissociative identity disorder. A case study is discussed in which the conclusion is made that pastoral care has an effective role in the healing process of the person with dissociative identity disorder
New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source
The violation of baryon number, B, is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, such a process has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation. The program will include high-sensitivity searches for processes that violate baryon number by one or two units: free neutron-antineutron oscillation (n -> (n) over bar) via mixing, neutron-antineutron oscillation via regeneration from a sterile neutron state (n -> [n',(n) over bar'] -> (n) over bar), and neutron disappearance (n -> n'); the effective Delta B = 0 process of neutron regeneration (n ->[n',(n) over bar'] -> n) is also possible. The program can be used to discover and characterize mixing in the neutron, antineutron and sterile neutron sectors. The experiment addresses topical open questions such as the origins of baryogenesis and the nature of dark matter, and is sensitive to scales of new physics substantially in excess of those available at colliders. A goal of the program is to open a discovery window to neutron conversion probabilities (sensitivities) by up to three orders of magnitude compared with previous searches. The opportunity to make such a leap in sensitivity tests should not be squandered. The experiment pulls together a diverse international team of physicists from the particle (collider and low energy) and nuclear physics communities, while also including specialists in neutronics and magnetics.Peer reviewe
Web Tool for Creating Educational/Therapeutic Programmes.
Research has shown technology fosters learning environments that stimulate improved academic performance, learners' satisfaction and completion rates. For this reason, an increasing number of researchers focus on the development of tools and applications that support the learning process of children. The tool presented here is a web application for educators, therapists, parents, and children with and without disabilities. The core concept of this tool is aiding professionals in creating relevant educational content and motivating children by presenting learning materials and tasks in a modern, relevant and motivating way. A pilot study was performed with five professionals, daily delivering instruction to children, mostly diagnosed with Autism Spectrum Disorder, at an NGO in Bosnia and Herzegovina. The study findings show a general positive attitude towards the use of the web tool in the classroom and its functionalities for creating teaching material
Use of Student Response Systems in Higher Education in Bosnia and Herzegovina
Increased uptake of student response systems (SRS) has been fueled by fast technological advances. Such systems provide various opportunities for enhancing teaching and learning environments through increased student engagement, interaction and provision of immediate feedback. The purpose of this study was to explore the benefits and challenges of SRS use in a higher education setting in Bosnia and Herzegovina. Results show positive effect of SRS use on some elements of the learning experience such as: student engagement, interaction, review of course material and obtaining instant feedback on attained knowledge. The results also revealed positive attitude of students towards the introduction of new technologies