cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Federated Cycling (FedCy): Semi-supervised Federated Learning of Surgical Phases
Creators: name: Kassem, Hasan
name: Alapatt, Deepak
name: Mascagni, Pietro
name: Consortium, AI4SafeChole
name: Karargyris, Alexandros
name: Padoy, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.10

description: Recent advancements in deep learning methods bring computer-assistance a step closer to fulfilling promises of safer surgical procedures. However, the generalizability of such methods is often dependent on training on diverse datasets from multiple medical institutions, which is a restrictive requirement considering the sensitive nature of medical data. Recently proposed collaborative learning methods such as Federated Learning (FL) allow for training on remote datasets without the need to explicitly share data. Even so, data annotation still represents a bottleneck, particularly in medicine and surgery where clinical expertise is often required. With these constraints in mind, we propose FedCy, a federated semi-supervised learning (FSSL) method that combines FL and self-supervised learning to exploit a decentralized dataset of both labeled and unlabeled videos, thereby improving performance on the task of surgical phase recognition. By leveraging temporal patterns in the labeled data, FedCy helps guide unsupervised training on unlabeled data towards learning task-specific features for phase recognition. We demonstrate significant performance gains over state-of-the-art FSSL methods on the task of automatic recognition of surgical phases using a newly collected multi-institutional dataset of laparoscopic cholecystectomy videos. Furthermore, we demonstrate that our approach also learns more generalizable features when tested on data from an unseen domain.
description: 13 pages, 6 figures
Mercury in stockpiled wastes, stream waters and sediments at an abandoned gold mine site near Trentham, Victoria
Creators: name: Hall, Rodney.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
SWAG Newsletter (April, 1980)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
On-chip ultra-compact hexagonal boron nitride topological ring-resonator in visible region
Creators: name: Wu, Min
name: Yang, Yibiao
name: Fei, Hongming
name: Lin, Han
name: Zhao, Xiaodan
name: Kang, Lijuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Ultra-compact topological ring-resonators with chirality are important devices for quantum optics. However, there are limited demonstrations of chiral resonators, especially in the visible region. We proposed a topological photonic ring-resonator based on hexagonal boron nitride (hBN) valley photonic crystal (VPC). The spin-valley locking effect in VPC allows achieving robust unidirectional transmission of edge states in the visible region (600 nm-650 nm). As a result, a high quality factor (679.3) with a free spectral range of 15.2 nm in the visible region can be achieved in a hBN all-pass filter with a compact size. In addition, we investigated the transmission properties of hBN ring-resonators with different shapes and combinations, confirming the flexibility of designing topological ring-resonators based on this principle. This design can be readily integrated with quantum photonic chips for broad applications.
description: 8 pages, 6 figures
Magnetically-regulated fragmentation of a massive, dense and turbulent clump
Creators: name: Fontani, F.
name: Commerçon, B.
name: Giannetti, A.
name: Beltrán, M. T.
name: Sánchez-Monge, Á.
name: Testi, L.
name: Brand, J.
name: Caselli, P.
name: Cesaroni, R.
name: Dodson, R.
name: Longmore, S.
name: Rioja, M.
name: Tan, J. C.
name: Walmsley, C. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Massive stars, multiple stellar systems and clusters are born from the gravitational collapse of massive dense gaseous clumps, and the way these systems form strongly depends on how the parent clump fragments into cores during collapse. Numerical simulations show that magnetic fields may be the key ingredient in regulating fragmentation. Here we present ALMA observations at ~0.25'' resolution of the thermal dust continuum emission at ~278 GHz towards a turbulent, dense, and massive clump, IRAS 16061-5048c1, in a very early evolutionary stage. The ALMA image shows that the clump has fragmented into many cores along a filamentary structure. We find that the number, the total mass and the spatial distribution of the fragments are consistent with fragmentation dominated by a strong magnetic field. Our observations support the theoretical prediction that the magnetic field plays a dominant role in the fragmentation process of massive turbulent clump.
description: 7 pages, 5 figures, 2 appendices (4 pages and 2 figures in the main text). Accepted for publication in A&A Letters
Fingerprints of modified gravity on galaxies in voids
Creators: name: Cataldi, Pedro
name: Pedrosa, Susana
name: Padilla, Nelson
name: Landau, Susana
name: Arnold, Christian
name: Li, Baojiu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We search for detectable signatures of f(R) gravity and its chameleon screening mechanism in the baryonic and dark matter (DM) properties of simulated void galaxies. The enhancement of the gravitational acceleration can have a meaningful impact on the scaling relations as well as on the halo morphology. The galaxy rotational velocity field (calculated with the velocity of the gas disc and the acceleration fields) deviates from the typical values of the Tully-Fisher Relation (TFR) in GR. For a given stellar mass, f(R) gravity tends to produce greater maximum velocities. On the other hand, the mass in haloes in f(R) gravity is more concentrated than their counterparts in GR. This trend changes when the concentration is calculated with the dynamical density profile, which takes into account the unscreened outer regions of the halo. Stellar discs interact with the overall potential well in the central regions, modifying the morphology of the screening regions and reshaping them. We find a trend for galaxies with a more dominant stellar disc to deviate further from round screening regions. We find that small haloes are less triaxial and more round in f(R) than their GR counterparts. The difference between halo morphology becomes smaller in f(R) haloes whose inner regions are screened. These results suggest possible observables that could unveil modified gravity effects on galaxies in voids in future cosmological tests of gravity.
description: 19 pages, 10 figures
Human Pose Estimation in Space and Time using 3D CNN
Creators: name: Grinciunaite, Agne
name: Gudi, Amogh
name: Tasli, Emrah
name: Uyl, Marten den
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper explores the capabilities of convolutional neural networks to deal with a task that is easily manageable for humans: perceiving 3D pose of a human body from varying angles. However, in our approach, we are restricted to using a monocular vision system. For this purpose, we apply a convolutional neural network approach on RGB videos and extend it to three dimensional convolutions. This is done via encoding the time dimension in videos as the 3\ts{rd} dimension in convolutional space, and directly regressing to human body joint positions in 3D coordinate space. This research shows the ability of such a network to achieve state-of-the-art performance on the selected Human3.6M dataset, thus demonstrating the possibility of successfully representing temporal data with an additional dimension in the convolutional operation.
description: Accepted at ECCV 2016 Workshop on: Brave new ideas for motion representations in videos
SWAG Newsletter (June, 1980)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
SWAG Newsletter (November, 1980)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
The von Zeipel-Lidov-Kozai effect inside mean motion resonances with applications to trans-Neptunian objects
Creators: name: Lei, Hanlun
name: Li, Jian
name: Huang, Xiumin
name: Li, Muzi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Secular dynamics inside MMRs plays an essential role in governing the dynamical structure of the trans-Neptunian region and sculpting the orbital distribution of trans-Neptunian objects (TNOs). In this study, semi-analytical developments are made to explore the von Zeipel-Lidov-Kozai (ZLK) resonance inside mean motion resonances (MMRs). To this end, a semi-secular model is formulated by averaging theory and then a single-degree-of-freedom integrable model is achieved based on the adiabatic invariance approximation. In particular, we introduce a modified adiabatic invariant, which is continuous around the separatrices of MMRs. During the long-term evolution, both the resonant Hamiltonian and the adiabatic invariant remain unchanged, thus phase portraits can be produced by plotting level curves of the adiabatic invariant with given Hamiltonian. The phase portraits provide global pictures to predict long-term behaviors of the eccentricity, inclination and argument of pericenter. Applications to some representative TNOs inside MMRs (2018 VO137, 2005 SD278, 2015 PD312, Pluto, 2004 HA79, 1996 TR66 and 2014 SR373) show good agreements between the numerically propagated trajectories under the full N-body model and the level curves arising in phase portraits. Interestingly, 2018 VO137 and 2005 SD278 exhibit switching behaviors during the long-term evolution and currently they are inside 2:5 MMR with Neptune.
description: 17 pages, 11 figures. Accepted for publication in AJ
Majorana-like Coulomb spectroscopy in the absence of zero bias peaks
Creators: name: Valentini, Marco
name: Borovkov, Maksim
name: Prada, Elsa
name: Marti-Sanchez, Sara
name: Botifoll, Marc
name: Hofmann, Andrea
name: Arbiol, Jordi
name: Aguado, Ramon
name: San-Jose, Pablo
name: Katsaros, Georgios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Hybrid semiconductor-superconductor devices hold great promise for realizing topological quantum computing with Majorana zero modes (MZMs). However, multiple claims of Majorana detection, based on either tunneling or Coulomb blockade (CB) spectroscopy, remain disputed. Here we devise an experimental protocol that allows to perform both types of measurements on the same hybrid island by adjusting its charging energy via tunable junctions to the normal leads. This method reduces ambiguities of Majorana detections by checking the consistency between CB spectroscopy and zero bias peaks (ZBPs) in non-blockaded transport.Specifically, we observe junction-dependent, even-odd modulated, single-electron CB peaks in InAs/Al hybrid nanowires (NWs) without concomitant low-bias peaks in tunneling spectroscopy. We provide a theoretical interpretation of the experimental observations in terms of low-energy, longitudinally-confined island states rather than overlapping Majorana modes. Our results highlight the importance of combined measurements on the same device for the identification of topological MZMs.
SWAG Newsletter (December, 1980)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
Predicting biosignatures for nutrient limited biospheres
Creators: name: Nicholson, A. E.
name: Daines, S. J.
name: Mayne, N. J.
name: Eager-Nash, J. K.
name: Lenton, T. M.
name: Kohary, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: With the characterisations of potentially habitable planetary atmospheres on the horizon, the search for biosignatures is set to become a major area of research in the coming decades. To understand the atmospheric characteristics that might indicate alien life we must understand the abiotic characteristics of a planet and how life interacts with its environment. In the field of biogeochemistry, sophisticated models of life-environment coupled systems demonstrate that many assumptions specific to Earth-based life, e.g. specific ATP maintenance costs, are unnecessary to accurately model a biosphere. We explore a simple model of a single-species microbial biosphere that produces CH4 as a byproduct of the microbes' energy extraction - known as a type I biosignature. We demonstrate that although significantly changing the biological parameters has a large impact on the biosphere's total population, such changes have only a minimal impact on the strength of the resulting biosignature, while the biosphere is limited by H2 availability. We extend the model to include more accurate microbial energy harvesting and show that adjusting microbe parameters can lead to a regime change where the biosphere becomes limited by energy availability and no longer fully exploits the available H2, impacting the strength of the resulting biosignature. We demonstrate that, for a nutrient limited biosphere, identifying the limiting nutrient, understanding the abiotic processes that control its abundance, and determining the biosphere's ability to exploit it, are more fundamental for making type I biosignature predictions than the details of the population dynamics of the biosphere.
description: 18 pages, 17 figures
Lactate dehydrogenases of the Australian freshwater blackfish, gadopsis marmoratus, Richardson : identification of isoenzymes and immunochemical comparison of blackfish LDH M4 with the homologous enzyme from proposed related species
Creators: name: Thompson, Robert James.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
SWAG Newsletter (March, 1981)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
One hundred years ago Alfred Landé unriddled the Anomalous Zeeman Effect and presaged Electron Spin
Creators: name: Schmidt-Böcking, Horst
name: Friedrich, Bretislav
Publisher: name: arXiv
Year: 2022
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: In order to commemorate Alfred Landé's unriddling of the anomalous Zeeman Effect a century ago, we reconstruct his seminal contribution to atomic physics in light of the atomic models available at the time. Landé recognized that the coupling of quantized electronic angular momenta via their vector addition within an atom was the origin of all the apparent mysteries of atomic structure as manifested by the anomalous Zeeman effect. We show to which extent Landé's ideas influenced the development of quantum physics, particularly Wolfgang Pauli's path to the exclusion principle. We conclude with Landé's brief biography.
Phase-controlled bistability of a dark soliton train in a polariton fluid
Creators: name: Goblot, Valentin
name: Nguyen, Hai Son
name: Carusotto, Iacopo
name: Galopin, Elisabeth
name: Lemaître, Aristide
name: Sagnes, Isabelle
name: Amo, Alberto
name: Bloch, Jacqueline
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We use a one-dimensional polariton fluid in a semiconductor microcavity to explore the rich nonlinear dynamics of counter-propagating interacting Bose fluids. The intrinsically driven-dissipative nature of the polariton fluid allows to use resonant pumping to impose a phase twist across the fluid. When the polariton-polariton interaction energy becomes comparable to their kinetic energy, linear interference fringes transform into a train of solitons. A novel type of bistable behavior controlled by the phase twist across the fluid is experimentally evidenced.
description: 5 pages Main + 4 pages Supplementary, 8 figures
A Natural Model of Spontaneous CP Violation
Creators: name: Girmohanta, Sudhakantha
name: Lee, Seung J.
name: Nakai, Yuichiro
name: Suzuki, Motoo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the possibility of building a natural non-supersymmetric model of spontaneous CP violation equipped with the Nelson-Barr (NB) mechanism to address the strong CP problem. Our approach is to utilize a doubly composite dynamics where the first confinement of the CFT occurs at the scale of spontaneous CP violation (SCPV) and the second confinement at the TeV scale. A holographic dual description of this 4D set-up via a warped extra dimension with three 3-branes provides an explicit realization of this idea.In this model, radiative corrections to the strong CP phase are well under control, and the coincidence of mass scales, which we generally encounter in NB models, is addressed. Our model also provides an explanation to the quark Yukawa hierarchies, and a solution to the gauge hierarchy problem just as in the usual Randall-Sundrum model with the Higgs being localized on the TeV brane.
description: 9 pages, 5 figures, model updated, published version
N=1 Deformations and RG Flows of N=2 SCFTs, Part II: Non-principal deformations
Creators: name: Agarwal, Prarit
name: Maruyoshi, Kazunobu
name: Song, Jaewon
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue to investigate the $\mathcal{N}=1$ deformations of four-dimensional $\mathcal{N}=2$ superconformal field theories (SCFTs) labeled by a nilpotent element of the flavor symmetry. This triggers a renormalization group (RG) flow to an $\mathcal{N}=1$ SCFT. We systematically analyze all possible deformations of this type for certain classes of $\mathcal{N}=2$ SCFTs: conformal SQCDs, generalized Argyres-Douglas theories and the $E_6$ SCFT. We find a number of examples where the amount of supersymmetry gets enhanced to $\mathcal{N}=2$ at the end point of the RG flow. Most notably, we find that the $SU(N)$ and $Sp(N)$ conformal SQCDs can be deformed to flow to the Argyres-Douglas (AD) theories of type $(A_1, D_{2N-1})$ and $(A_1, D_{2N})$ respectively. This RG flow therefore allows us to compute the full superconformal index of the $(A_1,D_N)$ class of AD theories. Moreover, we find an infrared duality between $\mathcal{N}=1$ theories where the fixed point is described by an $\mathcal{N}=2$ AD theory. We observe that the classes of examples that exhibit supersymmetry enhancement saturate certain bounds for the central charges implied by the associated two-dimensional chiral algebra.
description: 46 pages, 12 tables, typos corrected and some minor changes
Identifying active galactic nuclei via brightness temperature with sub-arcsecond International LOFAR Telescope observations
Creators: name: Morabito, Leah K.
name: Sweijen, F.
name: Radcliffe, J. F.
name: Best, P. N.
name: Kondapally, Rohit
name: Bondi, Marco
name: Bonato, Matteo
name: Duncan, K. J.
name: Prandoni, Isabella
name: Shimwell, T. W.
name: Williams, W. L.
name: van Weeren, R. J.
name: Conway, J. E.
name: Rivera, G. Calistro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Identifying active galactic nuclei (AGN) and isolating their contribution to a galaxy's energy budget is crucial for studying the co-evolution of AGN and their host galaxies. Brightness temperature ($T_b$) measurements from high-resolution radio observations at GHz frequencies are widely used to identify AGN. Here we investigate using new sub-arcsecond imaging at 144 MHz with the International LOFAR Telescope to identify AGN using $T_b$ in the Lockman Hole field. We use ancillary data to validate the 940 AGN identifications, finding 83 percent of sources have AGN classifications from SED fitting and/or photometric identifications, yielding 160 new AGN identifications. Considering the multi-wavelength classifications, brightness temperature criteria select over half of radio-excess sources, 32 percent of sources classified as radio-quiet AGN, and 20 percent of sources classified as star-forming galaxies. Infrared colour-colour plots and comparison with what we would expect to detect based on peak brightness in 6 arcsec LOFAR maps, imply that the star-forming galaxies and sources at low flux densities have a mixture of star-formation and AGN activity. We separate the radio emission from star-formation and AGN in unresolved, $T_b$-identified AGN with no significant radio excess and find the AGN comprises $0.49\pm 0.16$ of the radio luminosity. Overall the non-radio excess AGN show evidence for having a variety of different radio emission mechanisms, which can provide different pathways for AGN and galaxy co-evolution. This validation of AGN identification using brightness temperature at low frequencies opens the possibility for securely selecting AGN samples where ancillary data is inadequate.
description: Accepted for publication in MNRAS. 19 pages, 15 figures, 2 tables
THGEM gain calculations using Garfield++: Solving discrepancies between the simulation and experimental data
Creators: name: Azevedo, C. D. R.
name: Correia, P. M.
name: Carramate, L. F. N. D.
name: Silva, A. L. M.
name: Veloso, J. F. C. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Discrepancies between the measured and simulated gain in Thick Micropatterned gaseous detectors (MPGD), namely THGEM, have been observed by several groups. In order to simulate the electron avalanches and the gain the community relies on the calculations performed in Garfield++, known to produce differences of 2 orders of magnitude in comparison to the experimental data for thick MPGDs. In this work, simulations performed for Ne/5%CH4, Ar/5%CH4 and Ar/30%CO2 mixtures shows that Garfield++ is able to perfectly describe the experimental data if Penning effect is included in the simulation. The comparison between the number of excitations which may lead to a Penning transfer, is shown for THGEM and GEM, explaining the less pronounced gain discrepancies observed in GEM.
Dust grain size evolution in local galaxies: a comparison between observations and simulations
Creators: name: Relano, M.
name: De Looze, I.
name: Saintonge, A.
name: Hou, K. -C.
name: Romano, L.
name: Nagamine, K.
name: Hirashita, H.
name: Aoyama, S.
name: Lamperti, I.
name: Lisenfeld, U.
name: Smith, M.
name: Chastenet, J.
name: Xiao, T.
name: Gao, Y.
name: Sargent, M.
name: van der Giessen, S. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The evolution of the dust grain size distribution has been studied in recent years with great detail in cosmological hydrodynamical simulations taking into account all the channels under which dust evolves in the interstellar medium. We present a systematic analysis of the observed spectral energy distribution of a large sample of galaxies in the local universe in order to derive not only the total dust masses but also the relative mass fraction between small and large dust grains (DS/DL). Simulations reproduce fairly well the observations except for the high stellar mass regime where dust masses tend to be overestimated. We find that ~45% of galaxies exhibit DS/DL consistent with the expectations of simulations, while there is a sub-sample of massive galaxies presenting high DS/DL (log(DS/DL)~-0.5), and deviating from the prediction in simulations. For these galaxies, which also have high molecular gas mass fractions and metallicities, coagulation is not an important mechanism affecting the dust evolution. Including diffusion, transporting large grains from dense regions to a more diffuse medium where they can be easily shattered, would explain the observed high DS/DL values in these galaxies. With this study we reinforce the use of the small-to-large grain mass ratio to study the relative importance of the different mechanisms in the dust life cycle. Multi-phase hydrodynamical simulations with detailed feedback prescriptions and more realistic subgrid models for the dense phase could help to reproduce the evolution of the dust grain size distribution traced by observations.
description: 32 pages, 22 figures, 4 tables. Accepted in MNRAS
Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
Creators: name: Albouy, Guillaume
name: Barron, Jared
name: Beauchesne, Hugues
name: Bernreuther, Elias
name: Bona, Marcella
name: Cazzaniga, Cesare
name: Cesarotti, Cari
name: Cohen, Timothy
name: de Cosa, Annapaola
name: Curtin, David
name: Demiragli, Zeynep
name: Doglioni, Caterina
name: Elliot, Alison
name: DiPetrillo, Karri Folan
name: Eble, Florian
name: Erice, Carlos
name: Freer, Chad
name: Garcia-Bellido, Aran
name: Gemmell, Caleb
name: Genest, Marie-Hélène
name: di Cortona, Giovanni Grilli
name: Gustavino, Giuliano
name: Hemme, Nicoline
name: Holmes, Tova
name: Kar, Deepak
name: Knapen, Simon
name: Kulkarni, Suchita
name: Lavezzo, Luca
name: Lowette, Steven
name: Maier, Benedikt
name: Mee, Seán
name: Mrenna, Stephen
name: Nair, Harikrishnan
name: Niedziela, Jeremi
name: Papageorgakis, Christos
name: Parmar, Nukulsinh
name: Paus, Christoph
name: Pedro, Kevin
name: Peixoto, Ana
name: Perloff, Alexx
name: Plehn, Tilman
name: Scherb, Christiane
name: Schwaller, Pedro
name: Shelton, Jessie
name: Singh, Akanksha
name: Sinha, Sukanya
name: Sjöstrand, Torbjörn
name: Spourdalakis, Aris G. B.
name: Stolarski, Daniel
name: Strassler, Matthew J.
name: Usachov, Andrii
name: Sierra, Carlos Vázquez
name: Verhaaren, Christopher B.
name: Wang, Long
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this work, we consider the case of a strongly coupled dark/hidden sector, which extends the Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions generally contain matter fields, much like the SM quarks, and gauge fields similar to the SM gluons. We focus on the exploration of such sectors where the dark particles are produced at the LHC through a portal and undergo rapid hadronization within the dark sector before decaying back, at least in part and potentially with sizeable lifetimes, to SM particles, giving a range of possibly spectacular signatures such as emerging or semi-visible jets. Other, non-QCD-like scenarios leading to soft unclustered energy patterns or glueballs are also discussed. After a review of the theory, existing benchmarks and constraints, this work addresses how to build consistent benchmarks from the underlying physical parameters and present new developments for the PYTHIA Hidden Valley module, along with jet substructure studies. Finally, a series of improved search strategies is presented in order to pave the way for a better exploration of the dark showers at the LHC.
description: Uniform notation, fixed typos, improved numerical analysis, added references, comments welcome
On the second derivatives of periods and braking indices in radio pulsars
Creators: name: Malov, I. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The analysis of some braking mechanisms for neutron stars was carried out to determine the sign of the second derivative of the pulsar period. This quantity is the important parameter for calculations of the braking index n. It is shown that this derivative can be positive and lead to decreasing of n. It is necessary to correct the methods of calculations of n used this moment because they are based as a rule on the suggestion on the constancy of pulsar parameters (magnetic fields, angles between some axes and so on). The estimations of corrections to braking indices are obtained. It is shown that these corrections can be marked for pulsars with long periods and their small derivatives.
description: 9 pages, 1 table
Line-by-line velocity measurements, an outlier-resistant method for precision velocimetry
Creators: name: Artigau, Étienne
name: Cadieux, Charles
name: Cook, Neil J.
name: Doyon, René
name: Vandal, Thomas
name: Donati, Jean-Françcois
name: Moutou, Claire
name: Delfosse, Xavier
name: Fouqué, Pascal
name: Martioli, Eder
name: Bouchy, François
name: Parsons, Jasmine
name: Carmona, Andres
name: Dumusque, Xavier
name: Astudillo-Defru, Nicola
name: Bonfils, Xavier
name: Mignon, Lucille
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a new algorithm for precision radial velocity (pRV) measurements, a line-by-line (LBL) approach designed to handle outlying spectral information in a simple but efficient manner. The effectiveness of the LBL method is demonstrated on two datasets, one obtained with SPIRou on Barnard's star, and the other with HARPS on Proxima Centauri. In the near-infrared, the LBL provides a framework for m/s-level accuracy in pRV measurements despite the challenges associated with telluric absorption and sky emission lines. We confirm with SPIRou measurements spanning 2.7 years that the candidate super-Earth on a 233-day orbit around Barnard's star is an artifact due to a combination of time-sampling and activity. The LBL analysis of the Proxima Centauri HARPS post-upgrade data alone easily recovers the Proxima b signal and also provides a 2-sigma detection of the recently confirmed 5-day Proxima d planet, but argues against the presence of the candidate Proxima c with a period of 1900 days. We provide evidence that the Proxima c signal is associated with small, unaccounted systematic effects affecting the HARPS-TERRA template matching RV extraction method for long-period signals. Finally, the LBL framework provides a very effective activity indicator, akin to the full width at half maximum derived from the cross-correlation function, from which we infer a rotation period of $92.1^{+4.2}_{-3.5}$ days for Proxima.
description: Accepted for publication in AJ
CCR and CAR algebras are connected via a path of Cuntz-Toeplitz algebras
Creators: name: Kuzmin, Alexey
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: For $q \in \mathbb{R}$, $|q| < 1$ we consider the universal enveloping $C^*$-algebra of a $*$-algebra of $q$-canonical commutation relations ($q$-CCR), which is generated by $a_1, \ldots, a_n$ subject to the relations \[ a_i^* a_j = δ_{ij} 1 + q a_j a_i^* . \] It has a distinguished representation $π_F$ called the Fock representation, which is believed to be faithful. In this article we denote the image of the universal enveloping $C^*$-algebra of $q$-CCR in the Fock representation by $\beth_q$. The question whether $C^*$-isomorphism $\beth_q \simeq \beth_0$ holds has been considered in the literature and proved for $|q| < 0.44$. In this article we show that $\beth_q \simeq \beth_0$ for $|q| < 1$.
A variational approach to the vibrational spectra of triatomic molecules
Creators: name: Quiney, Harry Morris.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Non-equilibrium Atomic Condensates and Mixtures: Collective Modes, Condensate Growth and Thermalization
Creators: name: Lee, Kean Loon
name: Proukakis, Nick P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The non-equilibrium dynamics of trapped ultracold atomic gases, or mixtures thereof, is an extremely rich subject. Despite 20 years of studies, and remarkable progress mainly on the experimental front, numerous open question remain, related to the growth, relaxation and thermalisation of such systems, and there is still no universally-accepted theory for their theoretical description. In this paper we discuss one of the state-of-the-art kinetic approaches, which gives an intuitive picture of the physical processes happening at the microscopic scale, being broadly applicable both below and above the critical region (but not within the critical region itself). Specifically, the Zaremba-Nikuni-Griffin (ZNG) scheme provides a self-consistent description of the coupling between the condensate and the thermal atoms, including the collisions between these two subsystems. It has been successfully tested against experiments in various settings, including collective modes (e.g. monopole, dipole and quadrupole modes), topological excitations (solitons and vortices) and surface evaporative cooling. Here, we show that it can capture two important aspects of non- equilibrium dynamics for both single-component and two-component BECs: the Kohn mode (the undamped dipole oscillation independent of interactions and temperature) and (re)thermalization leading to condensate growth following sudden evaporation. Our simulations, performed in a spherically-symmetric trap reveal (i) an interesting two-stage dynamics and the emergence of a prominent monopole mode in the evaporative cooling of a single component Bose gas, and (ii) the long thermalization time associated with the sympathetic cooling of a realistic two-component mixture. Related open questions arise about the mechanisms and the nature of thermalization in such systems, where further controlled experiments are needed for benchmarking.
description: 13 pages of main text, Special issue on Addressing Quantum Many-body Problems with Cold Atoms and Molecules
E-RIHS PP D3.2 Human Resources Policy
Creators: name: Roi, Arnaud
name: Edmond, Jennifer
name: Raciti, Marco
Publisher: name: Zenodo
Year: 2020
Subjects: human resources, recruitment, remuneration, motivation, engagement, career building, risk mitigation

description: The aim of this report is to define a sound policy for human resource acquisition and management for the future E-RIHS ERIC. It aims at giving an overview of every aspects a research infrastructure should consider to create and implement the most adequate human resources policy adapted to its needs and ambitions. The report describes the type of experts E-RIHS would need in its central office to achieve its missions and its objectives. For each key role the scope of responsibilities and the required skills set as well as the level of remuneration is detailed. The organisational structure of E-RIHS has been analysed as well. The structure of an organisation affects namely its ability to respond and adjust to change but it also has an impact on the motivation and commitment of the employees. The report also tackles the different forms of employment used in ERICs and presents the alternative between direct employment and secondment, assessing their advantages and disadvantages. It also identifies and describes in details the main stages of the recruitment process as well as define a recruitment strategy. Hiring is an investment and good recruitment takes time. From anticipating the need to integrating the new employee, there are many steps in the hiring process A research infrastructure should not only be able to attract and recruit good staff but, most importantly, retain its valuable personnel over time. As a consequence, the report reviews the different types of benefits and rewards the organisation can implement to be and stay attractive but also proposes motivation and engagement principles to address the needs and expectations of the employees. Offering a rich and cohesive training program to the employees in order to develop their skills and competencies is extremely important for an organisation. The report shows how it helps the staff to respond and adapt to the different challenges that may occur in a research infrastructure. Finally, the report identifies critical risks likely to have a negative impact on the human resources policy within E-RIHS and provides some thoughts and advices to mitigate those risks.
Tibetisch-sprachige und tibetische Sprache betreffende Literatur im Archiv der Evangelischen Brüder-Unität Herrnhut
Creators: name: Taube, Manfred
Publisher: name: Unitas Fratrum
Year: 1970

description: Unitas Fratrum, Bd. 19 (1987): Unitas Fratrum, Band 19/20
Osteology, myology, evolution and paleobiogeography of the emu, dromaius spp. (family casuariidae: dromaiinae)
Creators: name: Patterson, Chris.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Hybrid Cerenkov-scintillation detector validation using Monte Carlo simulations
Creators: name: Jean, Emilie
name: Lambert-Girard, Simon
name: Therriault-Proulx, Francois
name: Beaulieu, Luc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Objective: This study aimed at investigating through Monte Carlo simulations the limitations of a novel hybrid Cerenkov-scintillation detector and the associated method for irradiation angle measurements. Approach: Using Monte Carlo simulations, previous experimental irradiations of the hybrid detector with a linear accelerator were replicated to evaluate its general performances and limitations. Cerenkov angular calibration curves and irradiation angle measurements were then compared. Furthermore, the impact of the Cerenkov light energy dependency on the detector accuracy was investigated using the energy spectra of electrons travelling through the detector. Main results: Monte Carlo simulations were found to be in good agreement with experimental values. The irradiation angle absolute mean error was found to be lesser than what was obtained experimentally, with a maximum value of 1.12 degree for the 9 MeV beam. A 0.4% increase of the ratio of electrons having an energy below 1 MeV to the total electrons was found to impact the Cerenkov light intensity collected as a function of the incident angle. The effect of the Cerenkov intensity variation on the measured angle was determined to vary according to the slope of the angular calibration curve. While the contribution of scattered electrons with a lower energy affects the detector accuracy, greatest discrepancies result from the limitations of the calculation method and the calibration curve itself. Significance: A precise knowledge of the limitations of the hybrid detector and the irradiation angle calculation method is crucial for a clinical implementation. Moreover, the simulations performed in this study also corroborates hypotheses made regarding the relations between multiple Cerenkov dependencies and observations from the experimental measurements.
Ecology of the macrobenthos of a Victorian estuary (Anderson's Inlet)
Creators: name: Patra, Ronald W. R.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.