cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Technical debt and agile software development practices and processes: An industry practitioner survey
Creators: name: Holvitie, Johannes
name: Licorish, Sherlock A.
name: Spínola, Rodrigo O.
name: Hyrynsalmi, Sami
name: MacDonell, Stephen G.
name: Mendes, Thiago S.
name: Buchan, Jim
name: Leppänen, Ville
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context: Contemporary software development is typically conducted in dynamic, resource-scarce environments that are prone to the accumulation of technical debt. While this general phenomenon is acknowledged, what remains unknown is how technical debt specifically manifests in and affects software processes, and how the software development techniques employed accommodate or mitigate the presence of this debt. Objectives: We sought to draw on practitioner insights and experiences in order to classify the effects of agile method use on technical debt management. We explore the breadth of practitioners' knowledge about technical debt; how technical debt is manifested across the software process; and the perceived effects of common agile software development practices and processes on technical debt. In doing so, we address a research gap in technical debt knowledge and provide novel and actionable managerial recommendations. Method: We designed, tested and executed a multi-national survey questionnaire to address our objectives, receiving 184 responses from practitioners in Brazil, Finland, and New Zealand. Results: Our findings indicate that: 1) Practitioners are aware of technical debt, although, there was under utilization of the concept, 2) Technical debt commonly resides in legacy systems, however, concrete instances of technical debt are hard to conceptualize which makes it problematic to manage, 3) Queried agile practices and processes help to reduce technical debt; particularly, techniques that verify and maintain the structure and clarity of implemented artifacts. Conclusions: The fact that technical debt instances tend to have characteristics in common means that a systematic approach to its management is feasible. However, notwithstanding the positive effects of some agile practices on technical debt management, competing stakeholders' interests remain a concern.(Abridged)
description: Journal paper, 23 pages, 7 figures, 2 tables
Space use in a population of least chipmunks in the Southwest Yukon
Creators: name: Glennie, Linda Cuffableness
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes an investigation of space use in least chipmunks at Kluane Lake, in the southwest Yukon. I examined demography, home range and habitat use patterns in the population. Based on live-trapping data from two grids over two summers, mean number of animals on the study area was 22.6/grid, similar to chipmunk numbers measured there over the previous four years. The population was lower than is generally found in the same species further south, although year-to-year stability was typical. Chipmunks preferred open forest and shrub-land to closed-canopy forest, which is also typical of the genus. Home range sizes measured using telemetry averaged 4.86 ha, higher than in any previously published study of the genus. I examined the relationship between social spacing and space use. Home range overlap averaged 93.4%; chipmunks do not appear to defend exclusive core areas. Provoked interactions among neighbours suggested that social dominance was based on age, weight, and breeding condition, rather than ownership of space. Although provoked interactions were generally aggressive, the telemetry data suggest that such behaviour was artifactual. Comparing the encounter frequency of radio-collared animals to that generated by a random model showed that chipmunks avoided encounters, except when harvesting seasonally abundant food. Grid-trapping did not increase food or cover availability enough to affect home range size. There was evidence that the presence of traps affected use distribution but not enough to invalidate trap-based home range estimates. Comparison of trap and telemetry based estimates of home range size yielded no significant differences.
Radial solutions to a chemotaxis-consumption model involving prescribed signal concentrations on the boundary
Creators: name: Lankeit, Johannes
name: Winkler, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35K55 (primary), 35J61, 35Q92, 92C17 (secondary)

description: The chemotaxis system \begin{align*} u_t &= Δu - \nabla \cdot (u\nabla v), \\ v_t &= Δv - uv, \end{align*} is considered under the boundary conditions $\frac{\partial u}{\partialν}- u\frac{\partial v}{\partialν}=0$ and $v=v_\star$ on $\partialΩ$, where $Ω\subset\mathbb{R}^n$ is a ball and $v_\star$ is a given positive constant. In the setting of radially symmetric and suitably regular initial data, a result on global existence of bounded classical solutions is derived in the case $n=2$, while global weak solutions are constructed when $n\in \{3,4,5\}$. This is achieved by analyzing an energy-type inequality reminiscent of global structures previously observed in related homogeneous Neumann problems. Ill-signed boundary integrals newly appearing therein are controlled by means of spatially localized smoothing arguments revealing higher order regularity features outside the spatial origin. Additionally, unique classical solvability in the corresponding stationary problem is asserted, even in nonradial frameworks.
title: Damage modelling for the lifetime prediction of structural adhesive joints subjected to hygro‐thermo‐mechanical long‐term loading
Creators: name: Kroll, Ulrich
name: Matzenmiller, Anton
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: 620
subject: Schadensmechanik
subject: Mathematisches Modell
subject: Klebeverbindung
subject: Lebensdauer
subject: Prognose
subject: Mechanische Beanspruchung

description: Gefördert im Rahmen des Projekts DEAL
Modeling and RF Design Considerations for Advanced CMOS Technology Slides and Transcript
Creators: Ali Niknejad
Publisher: name: IEEE
Year: 2022

Short Courses and Tutorial Slides
Abstract: Advanced CMOS technology nodes are extremely complex marvels of engineering, offering nanoscale devices and metallization approaching terahertz speeds. In this tutorial, we will consider fundamental transistor and circuit properties such as gain, bandwidth, noise, and distortion. We will discuss how circuit design is impacted by advanced technology parameters and how to model these effects to design robust RF circuits.
Biography: Ali M. Niknejad received the Ph.D. degree in electrical engineering from the University of California, Berkeley. He holds the Donald O. Pederson Distinguished Professorship chair in the EECS department at UC Berkeley and is a faculty co-director of the Berkeley Wireless Research Center (BWRC). He is also the Associate Director of the Center for Converged TeraHertz Communications and Sensing (ComSenTer). Professor Niknejad is the recipient the 2017 IEEE Transactions on Circuits and Systems Darlington Best Paper Award, the 2017 Most Frequently Cited Paper Award (2010 to 2016) from the Symposium on Very Large-Scale Integration Circuits, the CICC 2015 Best Invited Paper Award, and the 2012 ASEE Frederick Emmons Terman Award.
On the Topological Properties of the World Trade Web: A Weighted Network Analysis
Creators: name: Fagiolo, Giorgio
name: Reyes, Javier
name: Schiavo, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Finance (q-fin.GN)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: This paper studies the topological properties of the World Trade Web (WTW) and its evolution over time by employing a weighted network analysis. We show that the WTW, viewed as a weighted network, displays statistical features that are very different from those obtained by using a traditional binary-network approach. In particular, we find that: (i) the majority of existing links are associated to weak trade relationships; (ii) the weighted WTW is only weakly disassortative; (iii) countries holding more intense trade relationships are more clustered.
description: To be submitted to APFA 6 Proceedings. 8 pages, 10 figures
Concanavalin A-targeted mesoporous silica nanoparticles for infection treatment
Creators: name: Martinez-Carmona, Marina
name: Izquierdo-Barba, Isabel
name: Colilla, Montserrat
name: Vallet-Regi, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The ability of bacteria to form biofilms hinders any conventional treatment against chronic infections and has serious socio-economic implications. In this sense, a nanocarrier capable of overcoming the barrier of the mucopolysaccharide matrix of the biofilm and releasing its loaded-antibiotic within would be desirable. Herein, a new nanosystem based on levofloxacin (LEVO)-loaded mesoporous silica nanoparticles (MSNs) decorated with lectin Concanavalin A (ConA) has been developed. The presence of ConA promotes its internalization into the biofilm matrix, which increases the antimicrobial efficacy of the antibiotic hosted within the mesopores. This nanodevice is envisioned as a promising alternative to conventional infection treatments by improving the antimicrobial efficacy and reducing side effects.
description: 27 pages, 9 figures
Automated machine learning for supervised and unsupervised models with artificial neural networks
Creators: name: Naghizadeh Nohadani, Alireza
Publisher: name: No Publisher Supplied
Year: 2021

description: Artificial Neural Networks (ANNs) are powerful machine learning tools to find and apply patterns for intelligent decision making. These tools can be combined with automation to select few results among many trials. Since ANNs are used for both supervised and unsupervised learning, automation can lead to more trusted learning methods across many fields and lead to exploring possibilities that are considered impossible with current technology. In this thesis, at first, I introduce a new form of ANN architecture which is used exclusively for automated robot navigation. By doing so, I provide a high-level overview of both computational neuroscience and the potential of automation. Next, I introduce Greedy AutoAugment to automate the learning of state-of-the-art neural networks for both big and small datasets. I also create an efficient model to evaluate clustering in unsupervised learning. The model is further expanded to introduce unsupervised learning for deep subspace clustering. In the end, I provide discussion and the future research plan for automating ANNs in machine learning applications.
Biogeographic patterns: richness and diversity of amphibians in the [Southern plateau biogeographic province of Mexico] altiplano sur
Creators: name: Esparza Orozco, Alfredo
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Alpha diversity
subject: Beta diversity
subject: Remote sensors
subject: Ecological niche modeling
subject: Semiarid lands
subject: Distribution patterns
subject: Breeding sites
subject: http://agrovoc.uniroma2.it/agrovoc/agrovoc/en/page/c_6963
subject: http://agrovoc.uniroma2.it/agrovoc/agrovoc/en/page/c_359
subject: http://agrovoc.uniroma2.it/agrovoc/agrovoc/en/page/c_33949
subject: http://agrovoc.uniroma2.it/agrovoc/agrovoc/en/page/c_92341

description: The study of biodiversity, requires analysis of several aspects, such as scale in space and time to understand the underlying processes. In this study, amphibian distribution patterns of Southern Altiplano biogeographic province of Mexico, local and regional scales are analyzed. For the local scale, environmental heterogeneity was analyzed for 22 amphibian breeding sites, based on satellite imagery in raster format: normalized difference vegetation index (NDVI), normalized difference moisture index (NDWI), land surface temperature (LST), and the topographic moisture index (TWI). For regional scale, alpha and beta diversity components were analyzed at three spatial resolutions (1/2 °, 1/4 ° and 1/8 °) from primary and secondary data of biodiversity. At local level, NDVI and NDWI were consistent with observed in field; However, LST was the variable with highest contribution (16.04%) to explain amphibian composition. At regional level, alpha and beta diversity components change (are underestimated or overestimated) based on spatial resolution at a fixed scale. In addition, the alpha and beta diversity index values were consistent at local scale. In general, scale perspectives provide relevant information to define the Southern Altiplano as a region with greater environmental heterogeneity. Implications of this study are very useful to identify priority areas for study of biodiversity in semi-arid regions. Findings of this thesis can help to implement actions and measures of management and conservation of natural resources, specifically for amphibians, vertebrate group highly vulnerable to landscape transformation and climate change.
description: Thesis. M. Sc. in Innovation in Natural Resources Management, Colegio de Postgraduados, Campus San Luis Potosí, 2019
The local supermassive black hole mass density: corrections for dependencies on the Hubble constant
Creators: name: Graham, Alister W.
name: Driver, Simon P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have investigated past measurements of the local supermassive black hole mass density, correcting for hitherto unknown dependencies on the Hubble constant, which, in some cases, had led to an underestimation of the mass density by factors of ~2. Correcting for this, we note that the majority of past studies yield a local supermassive black hole mas density that is consistent with the range 4.4-5.9 x 10^5 f(H_0) M_Sun / Mpc^3 (when using H_0 = 70 km/s/Mpc). In addition, we address a number of ways in which these past estimates can be further developed. In particular, we tabulate realistic bulge-to-total flux ratios which can be used to estimate the luminosity of bulges and subsequently their central black hole masses.
description: MNRAS, accepted
Molecular dynamic simulation on the density of titanium dioxide and silver water-based nanofluids
Creators: name: Heyhat, M. M.
name: Abbasi, M.
name: Rajabpour, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This study utilizes molecular dynamics simulations to scrutinize the influence of type and volume fraction of nanoparticle on the density of nanofluids, i.e. silver (as a hydrophilic case) and titanium dioxide (as a hydrophobic case) water-based nanofluids. Ionic structure of TiO2 distinguishes the solid-liquid interactions with those in silver-water nanofluid. The thickness of nanolayer is estimated from density profile formed around the nanoparticle and is included in the density calculation. It is found that the type of interatomic potential between the nanoparticle and surrounding water can highly affect the thickness of nanolayer. The hydrophobicity/hydrophilicity of nanoparticle is of great importance in nanolayer density and its thickness. It is observed that the difference between the traditional binary mixture and the ternary mixture formula for calculating the density of nanofluid increases by increasing the volume fraction of nanoparticle. This indicates that the effect of nanolayer gets more considerable at high volume fractions.
Intergalactic heating by Lyman-alpha photons including hyperfine structure corrections
Creators: name: Meiksin, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Lyman-alpha photons from the first radiating sources in the Universe play a pivotal role in 21-cm radio detections of Cosmic Dawn and the Epoch of Reionization. Comments are provided on the effect of the hyperfine structure of hydrogen on the rate of heating or cooling of the Intergalactic Medium. It is shown that heating of the still neutral hydrogen by the Cosmic Microwave Background is negligible, with a characteristic heating time of 1e27 s/ (1+z) at redshift z.
description: Accepted for publication in Research Notes of the AAS. (Missing reference added.)
High-Speed and Mixed-Signal Circuit Design Techniques in FinFET Technology for Wireline and Optical Interface Applications Slides and Transcript
Creators: Jonathan E. Proesel
Publisher: name: IEEE
Year: 2022

Short Courses and Tutorial Slides
Abstract: Getting the best possible performance from analog and mixed-signal circuits requires a strong understanding of the underlying IC technology. Advanced FinFET CMOS technologies have the potential for excellent analog and mixed-signal performance. However, these technologies have many pitfalls for the unwary designer: highly restrictive design rules, thin metal layers, and device self-heating, to name a few problems. This talk explores how to capture the benefits and avoid the problems of FinFET technology in high-speed wireline communications circuits. The talk begins with a brief introduction to wireline communications circuits. Then it discusses FinFET technology and the impact to high-speed wireline circuits. A set of example circuit designs in 14nm FinFET are reviewed, studying system, circuit, and layout details. Finally, the talk concludes with a set of tips and techniques to get the most out of FinFET technologies.
Biography: Jonathan Proesel is a Research Staff Member at IBM T. J. Watson Research Center, where he has conducted circuit design research since 2010. He has designed analog and mixed-signal circuits in many silicon technologies, such as 130nm SiGe BiCMOS, 90nm SOI CMOS with monolithically integrated Si photonics, and 14 and 7nm FinFET. His primary research focus is high-speed optical and electrical wireline communications, and his other interests include silicon photonics, data converters, AI hardware, and design-technology co-optimization. He received the Ph.D. degree from Carnegie Mellon University in 2010. He is a co-recipient of the 2010 IEEE CICC Best Student Paper Award and the 2018 IEEE Photonics Technology Journal Best Paper Award. At IBM, he has received multiple technical awards. He serves on the technical program committee for the Symposium on VLSI Circuits.
Adiabatic limit of the eta invariant over cofinite quotient of PSL(2,R)
Creators: name: Loya, Paul
name: Moroianu, Sergiu
name: Park, Jinsung
Publisher: name: arXiv
Year: 2007
Subjects: subject: Spectral Theory (math.SP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J28, 58J50, 11F72, 22E46

description: We study the adiabatic limit of the eta invariant of the Dirac operator over cofinite quotient of PSL(2,R), which is a noncompact manifold with a nonexact fibred-cusp metric near the ends.
description: 25 pages
PointLIE: Locally Invertible Embedding for Point Cloud Sampling and Recovery
Creators: name: Zhao, Weibing
name: Yan, Xu
name: Gao, Jiantao
name: Zhang, Ruimao
name: Zhang, Jiayan
name: Li, Zhen
name: Wu, Song
name: Cui, Shuguang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Point Cloud Sampling and Recovery (PCSR) is critical for massive real-time point cloud collection and processing since raw data usually requires large storage and computation. In this paper, we address a fundamental problem in PCSR: How to downsample the dense point cloud with arbitrary scales while preserving the local topology of discarding points in a case-agnostic manner (i.e. without additional storage for point relationship)? We propose a novel Locally Invertible Embedding for point cloud adaptive sampling and recovery (PointLIE). Instead of learning to predict the underlying geometry details in a seemingly plausible manner, PointLIE unifies point cloud sampling and upsampling to one single framework through bi-directional learning. Specifically, PointLIE recursively samples and adjusts neighboring points on each scale. Then it encodes the neighboring offsets of sampled points to a latent space and thus decouples the sampled points and the corresponding local geometric relationship. Once the latent space is determined and that the deep model is optimized, the recovery process could be conducted by passing the recover-pleasing sampled points and a randomly-drawn embedding to the same network through an invertible operation. Such a scheme could guarantee the fidelity of dense point recovery from sampled points. Extensive experiments demonstrate that the proposed PointLIE outperforms state-of-the-arts both quantitatively and qualitatively. Our code is released through https://github.com/zwb0/PointLIE.
description: To appear in IJCAI 2021
Modeling urban street patterns
Creators: name: Barthelemy, Marc
name: Flammini, Alessandro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Urban streets patterns form planar networks whose empirical properties cannot be accounted for by simple models such as regular grids or Voronoi tesselations. Striking statistical regularities across different cities have been recently empirically found, suggesting that a general and details-independent mechanism may be in action. We propose a simple model based on a local optimization process combined with ideas previously proposed in studies of leaf pattern formation. The statistical properties of this model are in good agreement with the observed empirical patterns. Our results thus suggests that in the absence of a global design strategy, the evolution of many different transportation networks indeed follow a simple universal mechanism.
description: 4 pages, 5 figures, final version published in PRL
August : Special Issue on Aged Care
Creators: Bernard Fong
Kuldeep Singh Jadon
Nitin Gupta
Lalit Awasthi
N. Anitha
R.B. Vishnu Vardhan
R. Pradeep
A. R. Nazeem
M. Ananthi
T. Mangayarkarasi
R. K. Sai Suni Kumar
G. Jaya DarshiniI
U. V. Kalaivani
Publisher: name: IEEE
Year: 2023

Newsletter

This issue of Smart Cities eNewsletter contains a forward by Bernard Fong, "Sustainable Internet of Healthcare Things for Smart Cities", "An Automated Wearable Fall Detection System for Elderly People" and "Modified Blood Oxygen Levels Detection".
Studies on the collateralization of some basal forebrain and mesopontine tegmental projection systems in the rat
Creators: name: Jourdain, Anne
Publisher: name: University of British Columbia
Year: 2010

description: Many basal forebrain and mesopontine tegmental cholinergic projection systems tend to overlap in their origins. This raises the possibility that these projection systems are collateralized to innervate divergent areas. In experiment one, the degree to which basal forebrain and mesopontine tegmental neurons that innervate the reticular thalamic nucleus have axons that collateralize to innervate the cortex as well was examined with a retrograde fluorescence labeling method combined with immunohistochemistry. A significant portion of the labeled neurons in the region of the nucleus basalis magnocellularis and pedunculopontine tegmental nucleus projecting to the reticular thalamic nucleus were observed to be also labeled (double-labeled) following intracortical tracer injections. Many of these double-labeled neurons displayed choline acetyltransferase choline acetyltransferase immunoreactivity. It was also shown that numerous basal forebrain neurons that innervated the reticular thalamic nucleus contained the calcium-binding protein, parvalbumin. These neurons tended to be located more rostrally than the ChAT immunoreactive neurons; primarily in the region of the ventral pallidum. There was some indication that parvalbumin-containing neurons in the basal forebrain that innervate the reticular thalamic nucleus also have axons that branch to innervate the cortex. Finally, none of the basal forebrain neurons innervating the reticular thalamic nucleus was found to contain somatostatin. In experiment two, the degree to which basal forebrain neurons have axons that collateralize to innervate the interpeduncular nucleus and hippocampus was examined with retrograde fluorescence labeling methods. Labeled neurons projecting to both of these limbic structures were observed only occasionally. Comparison of the distribution of single labeled neurons innervating each of these structures revealed that within the region of origin, in the horizontal limb of the diagonal band, neurons innervating the interpeduncular nucleus tended to be located dorsally to those innervating the hippocampus. The results of these experiments are discussed in relation to their anatomical and functional implications toward a greater understanding of the basal forebrain and mesopontine cholinergic and non-cholinergic projection systems.
Cleaning Label Noise with Clusters for Minimally Supervised Anomaly Detection
Creators: name: Zaheer, Muhammad Zaigham
name: Lee, Jin-ha
name: Astrid, Marcella
name: Mahmood, Arif
name: Lee, Seung-Ik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Learning to detect real-world anomalous events using video-level annotations is a difficult task mainly because of the noise present in labels. An anomalous labelled video may actually contain anomaly only in a short duration while the rest of the video can be normal. In the current work, we formulate a weakly supervised anomaly detection method that is trained using only video-level labels. To this end, we propose to utilize binary clustering which helps in mitigating the noise present in the labels of anomalous videos. Our formulation encourages both the main network and the clustering to complement each other in achieving the goal of weakly supervised training. The proposed method yields 78.27% and 84.16% frame-level AUC on UCF-crime and ShanghaiTech datasets respectively, demonstrating its superiority over existing state-of-the-art algorithms.
description: Presented in the CVPR20 Workshop Learning from Unlabeled Videos. An archival version of this research work, published in SPL, can be accessed at: https://ieeexplore.ieee.org/document/9204830. arXiv admin note: substantial text overlap with arXiv:2008.11887
Comments on "Note on varying speed of light theories"
Creators: name: Magueijo, Joao
name: Moffat, John W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a recent note Ellis criticizes varying speed of light theories on the grounds of a number of foundational issues. His reflections provide us with an opportunity to clarify some fundamental matters pertaining to these theories.
Sentinel: A Hyper-Heuristic for the Generation of Mutant Reduction Strategies
Creators: name: Guizzo, Giovani
name: Sarro, Federica
name: Krinke, Jens
name: Vergilio, Silvia Regina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Mutation testing is an effective approach to evaluate and strengthen software test suites, but its adoption is currently limited by the mutants' execution computational cost. Several strategies have been proposed to reduce this cost (a.k.a. mutation cost reduction strategies), however none of them has proven to be effective for all scenarios since they often need an ad-hoc manual selection and configuration depending on the software under test (SUT). In this paper, we propose a novel multi-objective evolutionary hyper-heuristic approach, dubbed Sentinel, to automate the generation of optimal cost reduction strategies for every new SUT. We evaluate Sentinel by carrying out a thorough empirical study involving 40 releases of 10 open-source real-world software systems and both baseline and state-of-the-art strategies as a benchmark. We execute a total of 4,800 experiments, and evaluate their results with both quality indicators and statistical significance tests, following the most recent best practice in the literature. The results show that strategies generated by Sentinel outperform the baseline strategies in 95% of the cases always with large effect sizes. They also obtain statistically significantly better results than state-of-the-art strategies in 88% of the cases, with large effect sizes for 95% of them. Also, our study reveals that the mutation strategies generated by Sentinel for a given software version can be used without any loss in quality for subsequently developed versions in 95% of the cases. These results show that Sentinel is able to automatically generate mutation strategies that reduce mutation testing cost without affecting its testing effectiveness (i.e. mutation score), thus taking off from the tester's shoulders the burden of manually selecting and configuring strategies for each SUT.
description: in IEEE Transactions on Software Engineering
The unification of Pythagorean theorem for electronic orbitals with Kepler's law for planetary orbits
Creators: name: Xu, Kunming
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In the context of two-dimensional spacetime within a helium atom, both 1s electrons are characterized by wave functions that observe duality equation. They are symmetric, orthogonal and interwoven, forming a dynamic rope structure at any moment. Instead of elliptical orbit of planets around the sun, electronic orbitals take the form of matter state transformation cycle. While the kinematic movement of planets is governed by Kepler's first law, electronic transformation obeys Pythagorean theorem, both being equivalent in physical principle. The atomic spacetime is a continuous medium of electron clouds in synchronized differential and integral processes that are implemented by smooth trigonometry. In order to integrate this new approach with conventional physics, the author translates the pattern of electronic motion in the atomic spacetime into spherical volume undulation in Euclidean geometry and calculates the probability density of an electron within the sphere from the classical perspective. From the primary wave function of a 1s electron, the author also tries to derive the mathematical expression of central force that guides the surrounding bodies along the orbits. The result is exciting and surprising that questions the exactness of the venerable Coulomb's law.
description: 17 pages, 10 figures, comments are welcome
Experiences and insights from using Github Classroom to support Project-Based Courses
Creators: name: Nelson, Maria Augusta
name: Ponciano, Lesandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This work presents an approach for using GitHub classroom as a shared, structured, and persistent repository to support project-based courses at the Software Engineering Undergraduate program at PUC Minas, in Brazil. We discuss the needs of the different stakeholders that guided the development of the approach. Results on the perceptions of professors and students show that the approach brings benefits. Besides the lessons learned, we present insights on improving the education of the next generation of software engineers by employing metrics to monitor skill development, verifying student work portfolios, and employing tooling support in project-based courses.
description: 5 pages, 6 figures, position paper accepted to the Third International Workshop on Software Engineering Education for the Next Generation (SEENG workshop)
The Merger Rate of Black Holes in a Primordial Black Hole Cluster
Creators: name: Stasenko, Viktor D.
name: Kirillov, Alexander A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper, the merger rate of black holes in a cluster of primordial black holes (PBHs) is investigated. The clusters have characteristics close to those of typical globular star clusters. A cluster that has a wide mass spectrum ranging from $10^{-2}$ to $10 \, M_{\odot}$ (Solar mass) and contains a massive central black hole of the mass $M_{\bullet} = 10^3 \, M_{\odot}$ is considered. It is shown that in the process of the evolution of cluster, the merger rate changed significantly, and by now, the PBH clusters have passed the stage of active merging of the black holes inside~them.
The Metallicity of Intergalactic Gas in Cosmic Voids
Creators: name: Stocke, John T.
name: Danforth, Charles W.
name: Shull, J. Michael
name: Penton, Steven V.
name: Giroux, Mark L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used the Hubble/STIS and FUSE archives of ultraviolet spectra of bright AGN to identify intergalactic Lya absorbers in nearby (z < 0.1) voids. From a parent sample of 651 Lya absorbers, we identified 61 void absorbers located more than 1.4/h_70 Mpc from the nearest L* or brighter galaxy. Searching for metal absorption in high-quality (S/N > 10) spectra at the location of three diagnostic metal lines (O VI 1032, C IV 1548, Si III 1206), we detected no metal lines in any individual absorber, or in any group of absorbers using pixel co-addition techniques. The best limits on metal-line absorption in voids were set using four strong Lya absorbers with N(H I) > 10^{14} cm^-2, with 3-sigma equivalent-width limits ranging from 8 mA (O VI), 7-15 mA (C IV), and 4-10 mA (Si III). Photoionization modeling yields metallicity limits Z < 10^{-1.8+/-0.4} Z_sun, from non-detections of C IV and O VI, some 6 times lower than those seen in Lya and OVI absorbers at z < 0.1. Although the void Lya absorbers could be pristine material, considerably deeper spectra are required to rule out a universal metallicity floor produced by bursts of early star formation, with no subsequent star formation in the voids. The most consistent conclusion derived from these low-z results, and similar searches at z = 3-5, is that galaxy filaments have increased their mean IGM metallicity by factors of 30-100 since z = 3.
description: Accepted for ApJ, 8 pages including Fig 1a,b
Electrostatic potential measurement at the Pt/TiO$_2$ interface using electron holography
Creators: name: Nakajima, Hiroshi
name: Tanigaki, Toshiaki
name: Toriyama, Takaaki
name: Yamamoto, Mahito
name: Tanaka, Hidekazu
name: Murakami, Yasukazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The interface of Pt/TiO$_2$ plays an essential role in device engineering and chemical reactions. Here, we report the electrostatic potential distribution of a Pt/TiO$_2$ interface by electron holography. The decrease of the electrostatic potential exists at TiO$_2$ in the vicinity of the interface, indicating the presence of negative charge due to electron transfer from TiO$_2$ and Pt. The decrease of the electrostatic potential can be understood in the difference in work functions between Pt and TiO$_2$. This study reveals the interplay between Pt and TiO$_2$ and the usefulness of electron holography for probing the potential in nanoscale interfaces.
Embedded Memory and Support-Circuitry Design Considerations in Advanced CMOS Technology Slides
Creators: Eric Karl
Publisher: name: IEEE
Year: 2022

Short Courses and Tutorial Slides
Abstract: Rapidly accelerating compute requirements are driving the need for improved bandwidth, reduced latency, higher density and better energy ef?ciency from the memory hierarchy. Embedded memories play a critical role in mitigating the latency and bandwidth limitations of accessing external storage-class memories. This course will explore the challenges of embedded SRAM, DRAM, MRAM and RRAM in advanced technologies and focus on state-of-the-art-circuit techniques used to assist memory functionality and performance.                                                                                                                                                                             Bio: Eric Karl (Sí03ñMí08) received B.S.E., M.S.E. and Ph.D. degrees in Electrical Engineering from the University of Michigan, Ann Arbor, Michigan  in 2002, 2004 and 2008, respectively. Dr. Karl held positions at Intel Circuit Research Lab, IBM T.J. Watson Research Center and Sun Microsystems prior to 2008. In 2008, he joined Intel Logic Technology Development, where he is a Senior Principal Engineer engaged in the development of memory circuit technology for low-power and high-performance SoC applications. Dr. Karl has published 27 conference papers and technical journal articles.
Seismic risk assessment of bridges considering soil-structure interaction by means of a frequency and intensity dependent order reduction
Creators: name: Λεσγίδης, Νικόλαος Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αλληλεπίδραση εδάφους κατασκευής
Μείωση τάξης
Αποτίμηση τρωτότητας
΄Εμπειρο σύστημα
Model order reduction
Soil structure interaction
Fragility assessment
Expert systems

description: Όπως έχει παρατηρηθεί και στο παρελθόν η αλληλεπίδραση του εδάφους με την ανωδομή μιας κατασκευής γεφυροποιΐας μπορεί να επηρεάσει σημαντικά την απόκριση της κατά την διάρκεια μιας σεισμικής διέγερσης. Έτσι στην πλειοψηφία των περιπτώσεων κρίνεται απαραίτητη η ορθή και λεπτομερής προσομοίωση του φαινομένου αλληλεπίδρασης εδάφους κατασκευής τόσο κατά την διάρκεια του σχεδιασμού οσο και στην διαδικασία αποτίμησης σεισμικής επικινδυνότητας των κατασκευών γεφυροποιΐας.Διάφορες μεθοδολογίες μείωσης τάξης προσομοιώματος έχουν προταθεί με σκοπό την ελαχιστοποίηση του υπολογιστικού κόστους της προσομοίωσης της αλληλεπίδρασης εδάφους - κατασκευής. Ωστόσο οι προαναφερόμενες μεθοδολογίες αδυνατούν να διατηρήσουν το σύνολο των απαραίτητων ιδιοτήτων του ανελαστικού δυναμικού συστήματος με το πέρας της διαδικασίας μείωσης τάξης. Στην παρούσα διδακτορική διατριβή αναπτύσσεται μια ολοκληρωμένη μεθοδολογία μείωσης ανελαστικών δυναμικών συστημάτων αλληλεπίδρασης εδάφους – κατασκευής γεφυροποιΐας η οποία εξαλείφει τους προαναφερόμενους περιορισμούς. Τέλος πραγματοποιείται η υλοποίηση ενός ολοκληρωμένου και ενοποιημένου λογισμικού το οποίο εκτελεί αυτοματοποιημένα την αποτίμηση σεισμικής επικινδυνότητας κατασκευών γεφυροποιΐας με την χρήση της προτεινόμενης μεθοδολογίας μείωσης τάξης προσομοιώματος.
description: It has been shown that soil-structure interaction (SSI) can lead to a significant alteration of the response of a bridge structure under earthquake loading. The computational demand of such an analysis for the design and assessment of structures, as well as for the evaluation of their life cycle cost and risk exposure has led the civil engineering community to the development of a variety of methods towards model order reduction of the coupled soil-structure dynamic system. Yet no approach was capable of capturing simultaneously the frequency-dependent dynamic properties and the nonlinear behavior of the condensed segment of the overall soil-structure system, thus generating an imbalance between the modeling refinement achieved for the soil and the structure. In the current Thesis the aforementioned limitations are tackled through the development of a complete model order reduction methodology capable of targeting inelastic dynamic systems. The above order reduction method is implemented in a comprehensive computational expert system, developed to account for frequency-dependent soil-structure interaction in the fragility analysis of bridges.
Dynamically induced magnetism in KTaO$_3$
Creators: name: Geilhufe, R. Matthias
name: Juričić, Vladimir
name: Bonetti, Stefano
name: Zhu, Jian-Xin
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Computational Physics (physics.comp-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Dynamical multiferroicity features entangled dynamic orders: fluctuating electric dipoles induce magnetization. Hence, the material with paraelectric fluctuations can develop magnetic signatures if dynamically driven. We identify the paraelectric KTaO$_3$ (KTO) as a prime candidate for the observation of the dynamical multiferroicity. We show that when a KTO sample is exposed to a circularly polarized laser pulse, the dynamically induced ionic magnetic moments are of the order of 5\% of the nuclear magneton per unit cell. We determine the phonon spectrum using ab initio methods and identify T$_{1u}$ as relevant soft phonon modes that couple to the external field and induce magnetic polarization. We also predict a corresponding electron effect for the dynamically induced magnetic moment which is enhanced by several orders of magnitude due to the significant mass difference between electron and ionic nucleus.
description: 5 pages, 3 figures
Comparison of coherence times in three dc SQUID phase qubits
Creators: name: Paik, Hanhee
name: Cooper, B. K.
name: Dutta, S. K.
name: Lewis, R. M.
name: Ramos, R. C.
name: Palomaki, T. A.
name: Przybysz, A. J.
name: Dragt, A. J.
name: Anderson, J. R.
name: Lobb, C. J.
name: Wellstood, F. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report measurements of spectroscopic linewidth and Rabi oscillations in three thin-film dc SQUID phase qubits. One device had a single-turn Al loop, the second had a 6-turn Nb loop, and the third was a first order gradiometer formed from 6-turn wound and counter-wound Nb coils to provide isolation from spatially uniform flux noise. In the 6 - 7.2 GHz range, the spectroscopic coherence times for the gradiometer varied from 4 ns to 8 ns, about the same as for the other devices (4 to 10 ns). The time constant for decay of Rabi oscillations was significantly longer in the single-turn Al device (20 to 30 ns) than either of the Nb devices (10 to 15 ns). These results imply that spatially uniform flux noise is not the main source of decoherence or inhomogenous broadening in these devices.
description: 4 pages, 5 figures, accepted for publication in IEEE Trans. Appl. Supercond
Projection-based QLP Algorithm for Efficiently Computing Low-Rank Approximation of Matrices
Creators: name: Kaloorazi, Maboud F.
name: Chen, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Matrices with low numerical rank are omnipresent in many signal processing and data analysis applications. The pivoted QLP (p-QLP) algorithm constructs a highly accurate approximation to an input low-rank matrix. However, it is computationally prohibitive for large matrices. In this paper, we introduce a new algorithm termed Projection-based Partial QLP (PbP-QLP) that efficiently approximates the p-QLP with high accuracy. Fundamental in our work is the exploitation of randomization and in contrast to the p-QLP, PbP-QLP does not use the pivoting strategy. As such, PbP-QLP can harness modern computer architectures, even better than competing randomized algorithms. The efficiency and effectiveness of our proposed PbP-QLP algorithm are investigated through various classes of synthetic and real-world data matrices.
Supplemental methods and results;Sample and locus metadata from Functional genetic diversity in an exploited marine species and its relevance to fisheries management
Creators: name: Petrou, Eleni L.
name: Fuentes-Pardo, Angela P.
name: Rogers, Luke A.
name: Orobko, Melissa
name: Tarpey, Carolyn
name: Isadora Jiménez-Hidalgo
name: Moss, Madonna L.
name: Dongya Yang
name: Pitcher, Tony J.
name: Sandell, Todd
name: Lowry, Dayv
name: Ruzzante, Daniel E.
name: Hauser, Lorenz
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60408 Genomics

description: The timing of reproduction influences key evolutionary and ecological processes in wild populations. Variation in reproductive timing may be an especially important evolutionary driver in the marine environment, where the high mobility of many species and few physical barriers to migration provide limited opportunities for spatial divergence to arise. Using genomic data collected from spawning aggregations of Pacific herring (Clupea pallasii) across 1600 km of coastline, we show that reproductive timing drives population structure in these pelagic fish. Within a specific spawning season, we observed isolation by distance, indicating that gene flow is limited over our study area. These results emphasize the importance of considering both seasonal and spatial variation in spawning when delineating management units for herring. On several chromosomes, we detected linkage disequilibrium extending over Mb, suggesting the presence of chromosomal rearrangements. Spawning phenology was highly correlated with polymorphisms in several genes, in particular SYNE2, which influences the development of retinal photoreceptors in vertebrates. SYNE2 is likely within a chromosomal rearrangement in Pacific herring and is also associated with spawn timing in Atlantic herring (Clupea harengus). The observed genetic diversity likely underlies resource waves provided by spawning herring. Given the ecological, economic and cultural significance of herring, our results support that conserving intraspecific genetic diversity is important for maintaining current and future ecosystem processes.
The Influence of Metallicity on Star Formation in Protogalaxies
Creators: name: Jappsen, A. -K.
name: Glover, S. C. O.
name: Klessen, R. S.
name: Mac Low, M. -M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In cold dark matter cosmological models, the first stars to form are believed to do so within small protogalaxies. We wish to understand how the evolution of these early protogalaxies changes once the gas forming them has been enriched with small quantities of heavy elements, which are produced and dispersed into the intergalactic medium by the first supernovae. Our initial conditions represent protogalaxies forming within a fossil H II region, a previously ionized region that has not yet had time to cool and recombine. We study the influence of low levels of metal enrichment on the cooling and collapse of ionized gas in small protogalactic halos using three-dimensional, smoothed particle hydrodynamics (SPH) simulations that incorporate the effects of the appropriate chemical and thermal processes. Our previous simulations demonstrated that for metallicities Z < 0.001 Z_sun, metal line cooling alters the density and temperature evolution of the gas by less than 1% compared to the metal-free case at densities below 1 cm-3) and temperatures above 2000 K. Here, we present the results of high-resolution simulations using particle splitting to improve resolution in regions of interest. These simulations allow us to address the question of whether there is a critical metallicity above which fine structure cooling from metals allows efficient fragmentation to occur, producing an initial mass function (IMF) resembling the local Salpeter IMF, rather than only high-mass stars.
description: 3 pages, 2 figures, First Stars III conference proceedings