cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Distribution, speciation and bioavailability of arsenic in a shallow-water submarine hydrothermal system, Tutum Bay, Ambitle Island, PNG
Creators: name: Price, Roy
name: Pichler, Thomas
Publisher: name: Elsevier Science
Year: 2005
Subjects: subject: Arsenic speciation
subject: Shallow-water hydrothermal venting
subject: sequential extraction
subject: Bioavailability
subject: 550

description: Shallow-water hydrothermal vent systems can introduce large amounts of potentially toxic elements, such as arsenic (As), into coastal marine environments. The first step in understanding and describing the potential impact of these elements throughout hydrothermally influenced coastal ecosystems is to determine the element's distribution and speciation, which in turn influences the availability of the toxin for biological uptake. Shallow submarine hot springs near Ambitle Island, Papua New Guinea, are discharging as much as 1.5 kg per day of arsenic directly into a coral-reef ecosystem. We have investigated the bioavailability of the As throughout Tutum Bay by studying vent fluid, seawater, pore water, precipitates, and sediments. In addition to measuring As abundance, As speciation (As(III), As(V), and the methylated species DMA and MMA) was determined in various waters. The As concentration for discrete mineral phases in vent precipitates and sediments was determined by sequentially extracting arsenic from the easily extractable, carbonate, Fe-oxyhydroxide or hydrous ferric oxide (HFO), and residual fractions, each of which have a different bioavailability. Diffuse venting seems to play a critical role on the distribution of As throughout Tutum Bay surface sediments, which have a mean As concentration of 527 ppm while excluding the vent precipitates (range = 1483 to 52 ppm). Up to 54 ppm As were extracted from the easily extractable fraction of surface sediments (mean = 19.7 ppm), using a K2HPO4/KH2PO4 buffer at pH = 7.2. Arsenic from this fraction is considered to be the most available for biological processes, and therefore the most dangerous for biota. However, sequential extraction shows that 98.6% of the As in vent precipitates, and a mean of 93.3% in surface sediments (range = 88.2% to 96.3%), is coprecipitated with the hydrous ferric oxide (HFO) fraction. Thus, the bulk of the As being discharged into Tutum Bay is scavenged by the HFO, and should remain stable unless the physicochemical conditions surrounding the oxides change. In surface seawaters of Tutum bay, we found as much as four times the average seawater concentration of As (8.4 μg/L compared to ∼2 μg/L). The abundance of As in seawater just above the sediment/water interface is near normal, although As(III) in both surface and bottom seawater throughout Tutum Bay is substantially enriched compared to average seawater. Hydrothermal venting therefore provides bioavailable As by two major pathways throughout Tutum Bay: 1) easily-exchangeable As from hydrothermally influenced sediments to as far away as 200 m from focused venting, and 2) in surface seawaters, which may allow for biological uptake by phytoplankton and transfer up the food web.
The precipitation of aragonite from shallow-water hydrothermal fluids in a coral reef, Tutum Bay, Ambitle Island, Papua New Guinea
Creators: name: Pichler, Thomas
name: Veizer, Jan
Publisher: name: Elsevier Science
Year: 2004
Subjects: subject: Aragonite
subject: Isotopic equilibrium
subject: coral reef
subject: hydrothermal
subject: Seawater
subject: Shallow-water
subject: 550

description: The fringing reef in Tutum Bay on the west side of Ambitle Island, Papua New Guinea is the only presently known coral reef exposed to the extensive discharge of a hot, mineralized hydrothermal fluid. There, aragonite and ferrihydrite, a hydrous ferric oxide, are the prominent hydrothermal precipitates. Aragonite forms two distinct crystal habits, (a) euhedral (pseudo-hexagonal) crystals up to 2 cm long and (b) micro-crystals similar in appearance to “feather dendrite”. Aragonite encrusts dead coral fragments, volcaniclastic boulders and pebbles, and fills secondary fracture and remaining primary intergranular porosity within volcaniclastic arenite. The hydrothermal aragonite has a distinctively different isotopic composition when compared to “normal” shallow-water marine inorganic and organic carbonate that precipitated from seawater. This difference arises from precipitation at high temperature from a mixture of seawater and hydrothermal fluid that has lower 87Sr/86Sr and δ18O values than seawater. Based on a 87Sr/86Sr mixing model, aragonite precipitated from a hydrothermal fluid–seawater mixture of approximately 9:1. Precipitation from the hydrothermal solution is mainly caused by CO2 degassing, but mixing between hydrothermal fluid and seawater may have enhanced precipitation due to an increase in pH. The δ13C of Tutum Bay hydrothermal aragonite ranges from 1.9‰ to 2.2‰ (VPDB). This range of values is in good agreement with experimental data [J. Phys. Chem. 72 (1968) 800; Geochim. Cosmochim. Acta 61 (1997) 3461], indicating that C-13-equilibirum has been reached during its formation. Values for δ18O range from 14.2‰ to 14.7‰ and calculated isotopic equilibrium temperatures are approximately 20 °C lower than directly measured vent fluids and those temperatures obtained from fluid inclusion experiments and the 87Sr/86Sr mixing model. This indicates that either oxygen isotope equilibrium was not attained or that the calcite–water fractionation factor for oxygen isotopes is not applicable for the precipitation of Tutum Bay hydrothermal aragonite. Trace element concentrations, except for the REEs, Y and Sr are low. The REE patterns of aragonite are similar to those of Tutum Bay vent water, indicating the hydrothermal origin of the aragonite. Rare earth element concentrations are higher in the coarse than in the fine-grained aragonite, which might be caused by a change in precipitation rate and seawater mixing.
Precipitation of Fe(III) oxyhydroxide deposits from shallow-water hydrothermal fluids in Tutum Bay, Ambitle Island, Papua New Guinea
Creators: name: Pichler, Thomas
name: Veizer, Jan
Publisher: name: Elsevier Science
Year: 1999
Subjects: subject: Fe(III) oxyhydroxide
subject: hydrothermal system
subject: shallow water
subject: Arsenic
subject: Papua New Guinea
subject: 550

description: Previous research on sea floor Fe(III) oxyhydroxide deposits has focused primarily on deep-sea, hydrothermal systems found along volcanically active portions of the mid-ocean ridges and on hydrogenetic deposits formed in deep basins and along continental shelves. There is, however, not much known about their formation in shallow-water settings associated with volcanic islands. The hydrothermal system at Ambitle Island, Papua New Guinea provides an excellent opportunity to study the formation of Fe(III) oxyhydroxides in a shallow-water setting. Precipitation from the hydrothermal solution is caused by mixing with seawater. Based on a 87Sr/86Sr mixing model, the calculated minimum and maximum seawater fractions are approximately 11 and 57%, respectively. Thus, precipitation of Tutum Bay Fe(III) oxyhydroxides takes place at a temperature range between approximately 60 and 93°C. The chemical composition shows low Mn contents (Fe/Mn>600), and elements that are usually enriched in Fe(III) oxyhydroxides, such as Co and V are below crustal abundance and well below their concentrations in island-arc volcanics. Arsenic concentrations, on the other hand, are by two orders of magnitude higher than those in other marine deposits. Rare earth element (REE) concentrations reflect their concentration in the hydrothermal fluids rather than seawater. The crystallinity of the deposits increases with age, as protoferrihydrite is apparently altered to Fe-smectite and hematite, and As-bearing minerals are formed. Contact with seawater, and therefore oxidizing conditions, seems to be the factor increasing the crystallinity.
A Comparative Study of Invariance-Aware Loss Functions for Deep Learning-based Gridless Direction-of-Arrival Estimation
Creators: name: Chen, Kuan-Lin
name: Rao, Bhaskar D.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Covariance matrix reconstruction has been the most widely used guiding objective in gridless direction-of-arrival (DoA) estimation for sparse linear arrays. Many semidefinite programming (SDP)-based methods fall under this category. Although deep learning-based approaches enable the construction of more sophisticated objective functions, most methods still rely on covariance matrix reconstruction. In this paper, we propose new loss functions that are invariant to the scaling of the matrices and provide a comparative study of losses with varying degrees of invariance. The proposed loss functions are formulated based on the scale-invariant signal-to-distortion ratio between the target matrix and the Gram matrix of the prediction. Numerical results show that a scale-invariant loss outperforms its non-invariant counterpart but is inferior to the recently proposed subspace loss that is invariant to the change of basis. These results provide evidence that designing loss functions with greater degrees of invariance is advantageous in deep learning-based gridless DoA estimation.
description: 5 pages. Accepted at ICASSP 2025
Abundance and mineralogical association of arsenic in the Suwannee Limestone (Florida): Implications for arsenic release during water–rock interaction
Creators: name: Price, Roy
name: Pichler, Thomas
Publisher: name: Elsevier Science
Year: 2006
Subjects: subject: Arsenic
subject: Aquifer storage and recovery (ASR)
subject: pyrite
subject: Suwannee Limestone
subject: Floridan aquifer
subject: 550

description: Arsenic (As) is being released from the Suwannee Limestone, Upper Floridan aquifer, during aquifer storage and recovery (ASR) cycle testing with concentrations of up to 130 μg/L in the recovered water. To determine the abundance and mineralogical association of As in the Suwannee Limestone matrix we have conducted a detailed mineralogical and geochemical study of 306 core samples. In addition to random sampling of core material, we also collected “targeted” samples of core material that contained organic material, hydrous ferric oxide, pyrite, phosphate minerals and clays. Bulk As concentrations were determined by acid digestion followed by hydride generation-atomic fluorescence spectrometry (HG-AFS). Specific mineral phases were analyzed using scanning electron microscopy (SEM) and electron-probe microanalyses (EPMA). The average As concentration for all 306 samples is 3.5 ppm, but only 1.7 ppm after exclusion of the “targeted” samples. The average for the “targeted” samples is 9.5 ppm. The detailed lithologic, mineralogical, and geochemical study of As in the Upper Floridan aquifer, Suwannee Limestone shows that: (1) Arsenic is present in the Suwannee Limestone in low concentrations, but is concentrated in minor mineral phases, particularly pseudo-framboidal pyrite. (2) Pyrite is generally As-rich and can contain concentrations between 100 and 11,200 ppm As (average 2300 ppm, n = 25). (3) Compared to pyrite, other trace minerals contain much less As. (4) Pyrite is ubiquitous throughout the Suwannee Limestone, but is most abundant in high porosity zones. (5) Previously suggested hydrous ferric oxide, clay minerals and apatite are not an important source of As. This study also provided some insight into the question whether the interaction (reaction) of water with an aquifer matrix that contains only a few part per million As is capable of producing high-As concentrations in groundwater. Our findings indicate that it can be relatively easy to generate a high-As groundwater despite a low bulk As concentration in the aquifer matrix. A change in physico-chemical conditions that selectively affects the stability of As-bearing minerals is sufficient to increase As concentrations by several orders of magnitude.
PLASTICFREE AND LOCAL VOLUNTEERS within the MAB Reserve: A JOINT ACTION TOWARD A MORE SUSTAINABLE USE OF OUR LANDWARD HERITAGE
Creators: name: Gaglioti, Martina
Publisher: name: figshare
Year: 2022
Subjects: subject: 50207 Environmental Rehabilitation (excl. Bioremediation)
subject: FOS: Earth and related environmental sciences

description: This contribution is the outcome of a recently joined clean up session. I have been invited by the local division a the national operating organization "Plasticfree ODV" taking part to a public engagement initiative aimed at local volunteers with the objective to collectively recover a landward portion of the Circeo MaB Reserve from abandoned wastes.
International Workshop on SMR Safety for a Sustainable Short-term Deployment- PROGRAMME
Creators: name: Mascari, Fulvio
name: Bentaib, Ahmed
name: Giannetti, Fabio
Publisher: name: Zenodo
Year: 2024
Subjects: subject: SASPAM-SA
subject: SMR
subject: NUCLEAR SAFETY
subject: Nuclear fission

description: The SASPAM-SA open workshop will promote international exchange of information and practices related to light water SMR safety considering the outcomes both from the current ongoing Horizon Euratom SASPAM-SA project and other EU-projects and Fora (e.g. European SMR Pre-partnership, IAEA, OECD/NEA, ETSON, etc.). The workshop’s objective is to share the advancements of the current major research activities on light water SMR safety and give the opportunity to discuss the main results. This allows to identify the needed knowledge development, in the view of additional short-term research actions, and to support the SMR European licensing process.
Spiral spin liquid in a frustrated honeycomb antiferromagnet: A single-crystal study of GdZnPO
Creators: name: Wan, Zongtang
name: Zhao, Yuqian
name: Chen, Xun
name: Ma, Zhaohua
name: Li, Zikang
name: Ouyang, Zhongwen
name: Li, Yuesheng
Publisher: name: arXiv
Year: 2025
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The frustrated honeycomb spin model can stabilize a subextensively degenerate spiral spin liquid with nontrivial topological excitations and defects, but its material realization remains rare. Here, we report the experimental realization of this model in the structurally disorder-free compound GdZnPO. Using a single-crystal sample, we find that spin-7/2 rare-earth Gd$^{3+}$ ions form a honeycomb lattice with dominant second-nearest-neighbor antiferromagnetic and first-nearest-neighbor ferromagnetic couplings, along with easy-plane single-site anisotropy. This frustrated model stabilizes a unique spiral spin liquid with a degenerate contour around the $\mathrm{K}$$\{$1/3,1/3$\}$ point in reciprocal space, consistent with our experiments down to 30 mK, including the observation of a giant residual specific heat. Our results establish GdZnPO as an ideal platform for exploring the stability of spiral spin liquids and their novel properties, such as the emergence of low-energy topological defects on the sublattices.
description: PHYSICAL REVIEW LETTERS 133, 236704 (2024)
Tracking Salal (Gaultheria shallon) and Western Red Cedar (Thuja plicata) Dieoff in Pacific Spirit Regional Park
Creators: name: Fisher, Benjamin
name: Kim, Justin
name: Campbell, Matthew
name: Tudor, Harry
Publisher: name: The University of British Columbia
Year: 2020

description: In the spring of 2019, multiple citizens raised concerns of western red cedar (Thuja plicata) and salad (Gaultheria shallon) disease and death in Pacific Spirit Regional Park (PSRP), Vancouver, B.C. Upon investigation by Metro Vancouver Parks staff, a few cases of such die off was confirmed. The purpose of this observational study was to identify and record the current extent of die-off of both western red Cedar and salal. The study also aimed to determine spatial trends of disease and die-off that might indicate the types of further research required, such as research into hydrology, topography, and soil structure. The geographic location and physical characteristics of each dying plant within view of existing trail infrastructure was collected, with the trails acting as transects. The data has been synthesized into the form of a Google MyMap™, which was made available to staff at Metro Vancouver Regional Parks and can be disseminated to organizations affiliated with the park, so that they may assess and compare population changes in the future. Although analysis of salal data was ultimately not conducted in this report due to low sample size, general trends for western red cedar indicate a higher concentration of disease and mortality near the eastern edge of the park possibly associated with disturbance in the form of residential construction, as well as near other localized sites of human disturbance of topography and soils. For example, concentrations of disease seem to exist near the Metro Vancouver Camosun drinking water reservoir, and near mounds of clay, gravel, concrete, or asphalt possibly deposited during trail construction or construction of UBC campus facilities such as the Sedgewick library. These findings should be taken as indications for further research, as no hypothesis testing was performed during this study. Initial findings suggest a review of construction and development practices in and around Pacific Spirit Regional Park, including appropriate removal and past and present construction related wastes and continued development of vegetation and soil restoration capacity.
Escala Pictográfica de Percepción de Competencia en Habilidades de Estabilidad de niñas (versión en castellano)
Creators: name: Estevan, Isaac
Publisher: name: Zenodo
Year: 2024

description: Cuaderno con explicación para la aplicación de la escala pictográfica de evaluación de la Percepción de Competencia en Habilidades de Estabilidad de niñas. Se describe el procedimiento a seguir durante las entrevistas individualizadas con un ejemplo (equilibrio invertido) y se aportan las siete habilidades motrices básicas incluidas para evaluar el dominio de estabilidad (equilibrio a una pierna, saltos laterales, andar hacia detrás sobre una superficie estrecha, salto de una altura con una pierna, estocada, desplazamiento lateral sobre tablas y equilibrio sobre una superficie inestable). Las opciones de respuesta siguen un procedimiento doble dicotómico en el que la persona encuestada, primero, según su auto-percepción debe elegir inicialmente entre dos niveles de ejecución descritos pictográficamente y segundo, debe indicar si considera que lo hace mejor o no que la imagen seleccionada anteriormente.
title: Data Driven Discoveries Adavale Basin Deep Crustal Seismic Survey (L215) Processed data release and early insights
Creators: name: Commonwealth Of Australia (Geoscience Australia)
name: Palu, T.
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2025
Subjects: subject: Deep Crustal Seismic
subject: Adavale Basin
subject: seismic interpretation
subject: Data Driven Discoveries
subject: Structural geology and tectonics

description: The Data Driven Discoveries program is a $30.9 million initiative led by Geoscience Australia in collaboration with the Geological Survey of Queensland. The program aims to re-examine decades old seismic data and collect new geoscientific data to identify opportunities for resource discovery in the Adavale Basin located in south-central Queensland. This program supports the Australian Government’s plans to achieve net zero emissions by 2050 by researching opportunities for hydrogen storage, groundwater and minerals within the basin and surrounding areas.A key component of the program is the Adavale Basin Deep Crustal Seismic Survey (L215), which was acquired from April to July 2023 and collected 1,715 line-km of deep crustal seismic data across the Adavale Basin, Belyando Basin and Warrabin Trough. The survey encompassed seven regional seismic lines (23GA-A1 to 23GA-A7) covering areas near the towns of Adavale, Charleville, Augathella and Blackall in the Adavale Basin, and extending westward through the Warrabin Trough towards Windorah and northward beyond Jericho to the Belyando Basin.The new seismic survey builds upon work previously published by the program, including the Adavale Basin 2D Reprocessed Seismic Data Package (Geoscience Australia, 2023) and the newly defined chemostratigraphic framework (Riley et al., 2023b). These efforts have significantly enhanced the understanding of the basin's stratigraphy, hydrogeology, resource potential, and underground salt storage opportunities. The modern, high-fold deep seismic reflection dataset produced by the new seismic survey delivers valuable insights into both shallow and deep crustal structures.
Towards traceable, scriptable, and efficient data distribution for next-generation genomics
Creators: name: Bradley, John
name: Leehr, Dan
name: Huang, Erich
name: Turner, Jonathan
name: Lapp, Hilmar
Publisher: name: F1000Research
Year: 2016

description: We report on our work using DukeDataService to build scalable command line and user-interface tools for digital genomics data during the lifecycle period from generation in a core facility to hand-off to investigator.

The video for this presentation at BOSC 2016 can be viewed here.
Supplementary document for Channel transformer U-Net: an automatically and effective skeletons extraction network for electronic speckle pattern interferometry - 6186404.pdf
Creators: name: Li, Biyuan
name: Li, Zhuo
name: Zhang, Jun
name: Sun, Gaowei
name: Mei, Jianqiang
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplementary Materials for CCT and experimental results
Increasing Riparian Habitat and Ecosystem Function in Lost Lagoon through Shoreline Restoration
Creators: name: Bull, Megan
name: Faulkner, Luke
name: Liu, Majella
name: Newman, Elli
name: Tang, Yang
Publisher: name: The University of British Columbia
Year: 2020

description: Lost Lagoon is a shallow, brackish body of water located in Stanley Park, Vancouver and is visited by many park-goers each day due to its proximity to downtown Vancouver. Originally a coastal saltmarsh, Lost Lagoon was isolated into a freshwater impoundment by the construction of the Stanley Park Causeway in 1916. Due to its unnatural formation and periodic inflow of saltwater, Lost Lagoon has remained a low-productivity ecosystem, primarily occupied by invasive vegetation, fish, and herptile species. Additionally, the area is currently plagued by a variety of ecological issues including excessive sediment infilling and high quantities of contaminated runoff. The objective of this document is to propose a detailed restoration plan for Lost Lagoon which would involve deconstructing a portion of the ‘concrete beach’ located in the South-West section of Lost Lagoon and undertaking native planting. The restoration plan would create a more natural shoreline with a sustainable riparian habitat while still enabling community members and visitors to interact positively with the area. A methodology for this project was developed based on several restoration frameworks from the literature. As part of this process the current social, economic and ecological values in Lost Lagoon were identified. Also, a stakeholder consultation process was undertaken to ensure that as many points of view as possible are taken into consideration. Site monitoring was undertaken, and water quality data was collected to determine both the site and water conditions and used to guide plant selection and restoration strategy. Together with the restoration frameworks from the literature, data collection and analysis, as well as stakeholder values and opinions a restoration plan was developed. This plan was crafted to meet the following goals: • Increase native shoreline planting • Improve water quality • Increase habitat for flora and fauna • Reduce undesirable human-shoreline interactions This restoration proposal was developed in collaboration with and for the Stanley Park Ecology Society and is intended to be presented to the Vancouver Park Board for consideration.
Probability distribution in the Toda system: The singular route to a steady state
Creators: name: Petrovic, Srdjan
name: Starcevic, Nikola
name: Stojanov, Nace
name: Huang, Liang
Publisher: name: arXiv
Year: 2025
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: This study reports on the evolution of the probability distribution in the configuration space of the two-dimensional Toda system. The distribution is characterized by singularities, which predominantly take two forms: double-cusped triangular lines and lines parallel to the equipotential line that defines the accessible region. Over time, the number of these singular patterns increases linearly. Consequently, at very large times, the singular patterns fully occupy the accessible area, resulting in a steady state probability distribution with a pronounced singular peak at the center. Changes in the singular patterns arise solely from the system's intrinsic dynamics rather than variations in its parameters, emphasizing the system's self-organizing nature over time. These results provide a deeper understanding of the collective motion of particles in symmetric, bounded, two-dimensional conservative systems.
On the smoothness of moduli spaces for quiver bundles
Creators: name: Singh, Amit Kumar
Publisher: name: arXiv
Year: 2025
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14D20

description: In this article, we study the smoothness of the moduli space of finite quiver vector bundles over the smooth complex projective curves.
description: 10 pages
Assessing the environmental footprint of alternative green biorefinery protein extraction techniques from grasses and legumes
Creators: name: Gaffey, James
name: Arce Matinez, Andres
name: Allan Andrade, Thalles
name: Ambye-Jensen, Morten
name: BISHOP, GEORGE
name: Collins, Maurice
name: Styles, David
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: The significant grasslands of Europe and its member states represents a significant feedstock opportunity for circular bioeconomy development. The development of green biorefineries (GBR), to supply protein for the feed industry from grass, could help many European member states to address significant deficits in protein availability and reduce imports. The current study assesses the environmental footprint of alternative GBR protein extraction techniques from grasses and legumes using life cycle assessment. The focus is on comparing feedstock and technology pathways that could displace soya bean imports. The study finds that leaf protein concentrate (LPC) produced from grass had an improved environmental performance when compared to soya bean meal (SBM), across the assessed feedstock (perennial ryegrass or grass-clover mixtures) and technology pathways (one-stage maceration versus multi-stage maceration). For example, in the case of Climate Change the emission intensity for LPC was 57–85 % lower per tonne of crude protein (CP) compared with SBM. Acidification burdens were 54–88 % lower, and Eutrophication: Freshwater burdens were 74–89 % lower. Some scenarios of GBR produced LPC with a larger Energy Resources: Non-Renewable burden than SBM, though this could be mitigated with higher renewable energy (biogas and wind energy) integration within the scenario. Grass-clover scenarios generally achieved a lower intensity of emissions compared to ryegrass scenarios, particularly in the category of Climate Change, where feedstock cultivation represented a significant contributor to impacts. Overall, GBR can produce high quality protein with a lower environmental burden than SBM, but choice of feedstock and system design are critical factors for overall environmental performance.
A computational method for multiple steady Hele-Shaw bubbles in planar domains
Creators: name: Nasser, Mohamed M. S.
name: Green, Christopher C.
name: Kalmoun, El Mostafa
Publisher: name: arXiv
Year: 2025
Subjects: subject: Complex Variables (math.CV)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 76D27, 65E10

description: We present a unified numerical method to determine the shapes of multiple Hele-Shaw bubbles in steady motion, and in the absence of surface tension, in three planar domains: free space, the upper half-plane, and an infinite channel. Our approach is based on solving the free boundary problem for the bubble boundaries using a fast and accurate boundary integral method. The main advantage of our method is that it allows for the treatment of a very high number of bubbles. The presented method is validated by recovering some existing results for steady bubbles in channels and free space. Several numerical examples are presented, many of which feature configurations of bubbles that have not appeared in the literature before.
Assessment of Pacific sand lance ( Ammodytes hexapterus ) and surf smelt ( Hypomesus pretiosus ) spawning at the ecologically restored Jericho Beach
Creators: name: Chow, Cassidy
name: Park, David
name: Colonel, Mikalyn Trinca
name: U, Nuno
Publisher: name: The University of British Columbia
Year: 2020

description: Vancouver BC is one of the most rapidly growing cities in Canada. With an abundance of coastal waters and shore lines and its population only set to increase in the next decades, it is important to assess the impacts that increasing urbanization will have on important coastal marine ecosystems. Intertidal zones and beach shore front provide significant biological and societal value through supporting native marine life and providing scenic space for recreational activities. In 2013, the City of Vancouver enacted a plan to restore vital intertidal areas of Jericho Beach to support native wildlife and increase urban biodiversity. One of the main goals of the project was to create an ideal habitat for local forage fish, a small, but vital intermediate fish in the British Columbian coastal ecosystems. Forage fish, such as Pacific sand lance ( Ammodytes hexapterus ) and surf smelt ( Hypomesus pretiosus ), help link energy sources from low-level trophic levels such as zooplankton to higher levels including larger fish, seabirds, marine mammals, and even BC’s iconic Orca whales. Furthermore, forage fish populations have been dropping in the Burrard Inlet, increasing the need for urban spawning areas to increase population sizes. In 2016, the City of Vancouver launched the Biodiversity Strategy aimed at increasing Vancouver’s wildlife and natural ecosystems through projects much like the 2013 Jericho Beach Restoration. This study aimed to investigate whether the Jericho Beach Restoration Project 2013 has been successful in hosting forage fish populations by conducting a quantitative comparison of Pacific sand lance ( A. hexapterus ) and surf smelt ( H.pretiosus ) spawning presence at two opposing sites of the beach: Site 1 - the Restored Beach and Site 2 - the unrestored Jericho Beach over one spawning season. Sediment samples were collected between January 2020 through February 2020 and processed using sieving methods and the vortex method. Abiotic parameters such as slope, sediment grain size, and salinity were measured. Laboratory analysis of sediment samples resulted in the stark absence of forage fish eggs of any kind during this time, despite sediment size analysis indicating similar and ideal sediment size ranges from 0.5mm - 2mm at each site. Ultimately, the results demonstrate that there was no forage fish spawning during the sampling period. Determining the performance of past ecological restoration projects, such as the Jericho beach restoration, may provide insight into how to improve new ones under Vancouver’s Biodiversity Strategy, and hopefully increase biodiversity and urban wildlife as a whole. We suggest further year-round monitoring of forage fish spawning on all coastal Vancouver beaches in the Burrard Inlet to identify whether spawning is present at all in the area.
Polarization and Consensus in a Voter Model under Time-Fluctuating Influences
Creators: name: Mobilia, Mauro
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the effect of time-fluctuating social influences on the formation of polarization and consensus in a three-party community consisting of two types of voters ("leftists" and "rightists") holding extreme opinions, and moderate agents acting as "centrists". The former are incompatible and do not interact, while centrists hold an intermediate opinion and can interact with extreme voters. When a centrist and a leftist/rightist interact, they can become either both centrists or both leftists/rightists. The population eventually either reaches consensus with one of the three opinions, or a polarization state consisting of a frozen mixture of leftists and rightists. As a main novelty, here agents interact subject to time-fluctuating external influences favouring in turn the spread of leftist and rightist opinions, or the rise of centrism. We determine the fate of the population under various scenarios, and show how the rate of change of external influences can drastically affect the polarization and consensus probabilities, as well as the mean time to reach the final state.
description: 18 pages, 6 figures, 3 appendices
CorpusStudio: Surfacing Emergent Patterns in a Corpus of Prior Work while Writing
Creators: name: Dang, Hai
name: Swoopes, Chelse
name: Buschek, Daniel
name: Glassman, Elena L.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: H.5.2; I.2.7

description: Many communities, including the scientific community, develop implicit writing norms. Understanding them is crucial for effective communication with that community. Writers gradually develop an implicit understanding of norms by reading papers and receiving feedback on their writing. However, it is difficult to both externalize this knowledge and apply it to one's own writing. We propose two new writing support concepts that reify document and sentence-level patterns in a given text corpus: (1) an ordered distribution over section titles and (2) given the user's draft and cursor location, many retrieved contextually relevant sentences. Recurring words in the latter are algorithmically highlighted to help users see any emergent norms. Study results (N=16) show that participants revised the structure and content using these concepts, gaining confidence in aligning with or breaking norms after reviewing many examples. These results demonstrate the value of reifying distributions over other authors' writing choices during the writing process.
description: 19 pages, 12 figures, 1 table, ACM CHI 2025
LA GESTIONE DI SITI D’INTERESSE NATURALISTICO E LE LIFE-LEARNING SKILLS SUBACQUEE NEL POST-PANDEMIA
Creators: name: Gaglioti, Martina
Publisher: name: figshare
Year: 2022
Subjects: subject: 60205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
subject: FOS: Biological sciences

description: LA GESTIONE DI SITI D’INTERESSE NATURALISTICO E LE LIFE-LEARNING SKILLS SUBACQUEE NEL POST-PANDEMIA
 Original contribution subsequently shared from the Editor on the paper version of "Mondo Sommerso" Journal for its own commercial use.
 (Unpaid contribution)
Mapping Vegetation Communities in Burns Bog, Delta, British Columbia : Building an Understanding of Habitat Heterogeneity to Inform Future Management Strategies
Creators: name: Rahn, Olivia
name: Slimon, Kelley
name: Lobe, Jack
name: Plantinga, Will
Publisher: name: The University of British Columbia
Year: 2020

description: This project aimed to map vegetation communities within Burns Bog in Delta, British Columbia and develop an understanding of the diverse set of ecotypes within the area. Our objective was to conduct a scientific, unbiased and reproducible survey of Burns Bog’s vegetation that could be compared to the findings of previous reports. We have made suggestions regarding management strategies for Burns Bog based on (1) presence of blue or red-listed ecosystems as defined by COSEWIC/SARA and (2) presence of habitat suitable for the red-legged frog (Rana aurora), a species of Special Concern defined by COSEWIC. We also took into account climate model projections for the region when considering future management strategies for Burns Bog. We found that dozens of distinctive habitats exist within larger areas previously classified as a singular habitat, and that the majority of suitable R.aurora habitat exists in areas threatened by future development and construction. We hope that this information can be used in the future to inform effective and innovative management of the Burns Bog area.
Escala Pictográfica de Percepción de Competencia en Habilidades de Estabilidad de niños (versión en castellano)
Creators: name: Estevan, Isaac
name: Xavier, García Massó
name: Cristina, Menescardi
name: Javier, Molina García
Publisher: name: Zenodo
Year: 2024

description: Cuaderno con explicación para la aplicación de la escala pictográfica de evaluación de la Percepción de Competencia en Habilidades de Estabilidad de niños. Se describe el procedimiento a seguir durante las entrevistas individualizadas con un ejemplo (equilibrio invertido) y se aportan las siete habilidades motrices básicas incluidas para evaluar el dominio de estabilidad (equilibrio a una pierna, saltos laterales, andar hacia detrás sobre una superficie estrecha, salto de una altura con una pierna, estocada, desplazamiento lateral sobre tablas y equilibrio sobre una superficie inestable). Las opciones de respuesta siguen un procedimiento doble dicotómico en el que la persona encuestada, primero, según su auto-percepción debe elegir inicialmente entre dos niveles de ejecución descritos pictográficamente y segundo, debe indicar si considera que lo hace mejor o no que la imagen seleccionada anteriormente.
Reliability of reduced inter-subject functional connectivity during naturalistic movie-watching fMRI in autism - comparison of German and Finnish samples
Creators: name: Lin, Feng
name: Albantakis, Laura
name: Brandi, Marie-Luise
name: Noppar, Tuomo
name: Sun, Lihua
name: Lukkarinen, Lasse
name: Nummenmaa, Lauri
name: Dukart, Jürgen
name: Schilbach, Leonhard
name: Lahnakoski, Juha
Publisher: name: Forschungzentrum Jülich
Year: 2024

description: FENS Forum 2024, Vienna, Austria, 25 Jun 2024 - 29 Jun 2024
description: Autism is a neurodevelopmental disorder, which may also be associated withaltered sensory responsivity to external stimuli. Naturalistic functionalmagnetic resonance imaging (fMRI) is a useful way to characterize brainactivity in real-life stimuli (e.g. movie-watching). Inter-subject functionalconnectivity (ISFC) is sensitive to stimuli-driven neural coupling acrossindividuals and appears to characterize the potential idiosyncrasy of brainactivity in the group of autistic participants (Bolton et al., 2018). The aim ofour study is to investigate idiosyncrasy by examining ISFCs between adultswith autism (AUT) and neurotypical (NT) individuals and to validate potentialfindings using cross-country datasets (German and Finnish samples).
Understanding the Ecology and Distribution of Carpophilus Beetles for Improved IPM in Almonds
Creators: name: Tobin, Stephen
Publisher: name: La Trobe
Year: 2025
Subjects: classificationCode: 300409
subject: Crop and pasture protection (incl. pests, diseases and weeds)
classificationCode: 410202
subject: Biosecurity science and invasive species ecology

description: A thesis submitted in total fulfilment of the requirements of the degree of Doctor of Philosophy to the School of Applied Systems Biology, La Trobe University, Victoria, Australia.
Towards traceable, scriptable, and efficient data distribution for next-generation genomics
Creators: name: Bradley, John
name: Leehr, Dan
name: Huang, Erich
name: Turner, Jonathan
name: Lapp, Hilmar
Publisher: name: F1000Research
Year: 2016

description: We report on our work using DukeDataService to build scalable command line and user-interface tools for digital genomics data during the lifecycle period from generation in a core facility to hand-off to investigator.
The Success of Pacific Herring (Clupea pallasi) Spawning Net Deployment in False Creek
Creators: name: Buu, Nathalie
name: Wang, Xinchen
name: Yang, Hailing
name: Yerxa, Kiana
Publisher: name: The University of British Columbia
Year: 2020

description: Due to decades of commercial fishing and changing environmental conditions, the Pacific herring ( Clupea pallasi) stock off the British Columbia coast have suffered habitat loss and population decline (Hay & McCarter, 2015). Many areas that herring once used as their spawning ground are no longer occupied due to the disturbance and destruction of their habitat. False Creek used to have a lush ecosystem that herring returned to annually to spawn, but industrialization of the area no longer makes it optimal for herring to spawn there. Therefore, the recent return of Pacific herring in False Creek is a significant event that is critical to the future health of Vancouver and BC Waters. Herring are a keystone species that supports the ecosystem and other marine life in BC. It is also important in terms of the City of Vancouver’s desire to preserve biodiversity and natural environments as Pacifc herring were outlined as a priority species to protect (City of Vancouver, 2016). The Squamish Streamkeepers Society is a group of volunteers that have developed a methodology to support herring populations in False Creek by deploying spawning nets that create habitat for egg deposition. The goal of our project was to document the practices of the Streamkeepers, bring scientific rigour to this successful practice, test best practices for net maintenance, share our findings, and explore any recommendations for improvement or simplification of the process. This study was conducted by examining the work of the Streamkeepers in False Creek Vancouver as well as determining if certain factors such as the location of the herring nets and time of deployment affect the success of egg densities on the nets.
Spectral efficiency for mmWave downlink with beam misalignment in urban macro scenario
Creators: name: Wojtun, Jaroslaw
name: Ziolkowski, Cezary
name: Kelner, Jan M.
name: Chandra, Aniruddha
name: Shukla, Rajeev
name: Ghosh, Anirban
name: Prokes, Ales
name: Mikulasek, Tomas
name: Zavorka, Radek
name: Horky, Petr
Publisher: name: arXiv
Year: 2025
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: E.4; H.4.3
subject: 94A40, 94A05, 94A12, 94A17

description: In this paper, we analyze the spectral efficiency for millimeter wave downlink with beam misalignment in urban macro scenario. For this purpose, we use a new approach based on the modified Shannon formula, which considers the propagation environment and antenna system coefficients. These factors are determined based on a multi-ellipsoidal propagation model. The obtained results show that under non-line-of-sight conditions, the appropriate selection of the antenna beam orientation may increase the spectral efficiency in relation to the direct line to a user.
description: 4 pages, 6 figures, 4 equations; 2024 4th URSI Atlantic Radio Science Meeting (ATRASC), Meloneras, Spain, 19-24 May 2024
An overview of OpenCitations, an open infrastructure to transform research assessment practices
Creators: name: Di Giambattista, Chiara
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Databases
subject: open science
subject: bibliographic metadata
subject: research assessment

description: Slide presentation from the online talk "An overview of OpenCitations, an open infrastructure to transform research assessment practices" given by Chiara Di Giambattista during the seminar "SILICE: La creación de un marco abierto para la información científica" (Madrid, 5 November 2024)
Power angular spectrum versus Doppler spectrum -- Measurements and analysis
Creators: name: Kelner, Jan M.
name: Ziolkowski, Cezary
name: Kryk, Michal
name: Wojtun, Jaroslaw
name: Nowosielski, Leszek
name: Przesmycki, Rafal
name: Bugaj, Marek
name: Chandra, Aniruddha
name: Shukla, Rajeev
name: Ghosh, Anirban
name: Prokes, Ales
name: Mikulasek, Tomas
Publisher: name: arXiv
Year: 2025
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: E.4; H.4.3
subject: 94A40, 94A05, 94A12, 94A17

description: In this paper, we present an empirical verification of the method of determining the Doppler spectrum (DS) from the power angular spectrum (PAS). Measurements were made for the frequency of 3.5 GHz, under non-line-of-sight conditions in suburban areas characteristic of a university campus. In the static scenario, the measured PAS was the basis for the determination of DSs, which were compared with the DSs measured in the mobile scenario. The obtained results show that the proposed method gives some approximation to DS determined with the classic methods used so far.
description: 5 pages, 7 figures, 1 table, 8 equations; 2023 17th European Conference on Antennas and Propagation (EuCAP), Florence, Italy, 26-31 Mar. 2023
Variability of radio signal attenuation by single deciduous tree versus reception angle at 80 GHz
Creators: name: Wojtun, Jaroslaw
name: Ziolkowski, Cezary
name: Kelner, Jan M.
name: Mikulasek, Tomas
name: Zavorka, Radek
name: Blumenstein, Jiri
name: Prokes, Alea
name: Chandra, Aniruddha
name: Narayan, Niraj
name: Ghosh, Anirban
Publisher: name: arXiv
Year: 2025
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: E.4; H.4.3
subject: 94A40, 94A05, 94A12, 94A17

description: Vegetation significantly affects radio signal attenuation, influenced by factors such as signal frequency, plant species, and foliage density. Existing attenuation models typically address specific scenarios, like single trees, rows of trees, or green spaces, with the ITU-R P.833 recommendation being a widely recognized standard. Most assessments for single trees focus on the primary radiation direction of the transmitting antenna. This paper introduces a novel approach to evaluating radio signal scattering by a single deciduous tree. Through measurements at 80 GHz and a bandwidth of approximately 2 GHz, we analyze how total signal attenuation varies with the reception angle relative to the transmitter-tree axis. The findings from various directional measurements contribute to a comprehensive attenuation model applicable to any reception angle and also highlight the impact of bandwidth on the received signal level.
description: 5 pages, 5 figures, 1 table, 7 equations; 2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 30 Mar.-4 Apr. 2025
The Ethnograph : Journal of Anthropological Studies. Volume 6
Creators: name: Bowden, Dominique
name: Soderlund, Megan
Publisher: name: Vancouver, BC : Anthropology Students Association of the University of British Columbia
Year: 2020

description: The 2020 edition of The Ethnograph: Journal of Anthropological Studies is pleased to feature student research from a number of anthropological subfields. In addition to individual papers, this year's journal features two Honours Communications from Teagan West and Katie Taher, highlighting their respective research into medieval skeletal analysis, and the recontextualization of yoga on a university campus.