cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bringing optical fluid motion analysis to the field: a methodology using an open source ROV as camera system and rising bubbles as tracers
Creators: name: Løken, Trygve K.
name: Ellevold, Thea J.
name: de la Torre, Reyna G. Ramirez
name: Rabault, Jean
name: Jensen, Atle
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Detailed water kinematics are important for understanding atmosphere-ice-ocean energy transfer processes in the Arctic. There are few in situ observations of 2D velocity fields in the marginal ice zone. Particle tracking velocimetry and particle image velocimetry are well known laboratory techniques for measuring 2D velocity fields, but they usually rely on fragile equipment and pollutive plastic tracers. Therefore, in order to bring these methods to the field, we have developed a new system which combines a compact open-source remotely operated vehicle as an imaging device, and air bubbles as tracing particles. The data obtained can then be analyzed using image processing techniques tuned for field measurements in the polar regions. The properties of the generated bubbles, such as the relation between terminal velocity and diameter, have been investigated under controlled conditions. The accuracy and the spread of the velocity measurements have been quantified in a wave tank and compared with theoretical solutions. Horizontal velocity components under periodic waves were measured within the order of 10% accuracy. The deviation from theoretical solutions is attributed to the bubble inertia due to the accelerated flow. We include an example from an Arctic field expedition where the system was deployed and successfully tested from an ice floe. This work is an important milestone towards performing detailed 2D flow measurements under the ice in the Arctic, which we anticipate will help perform much needed direct observations of the dynamics happening under sea ice.
What Role Do Intelligent Reflecting Surfaces Play in Multi-Antenna Non-Orthogonal Multiple Access?
Creators: name: de Sena, Arthur S.
name: Carrillo, Dick
name: Fang, Fang
name: Nardelli, Pedro H. J.
name: da Costa, Daniel B.
name: Dias, Ugo S.
name: Ding, Zhiguo
name: Papadias, Constantinos B.
name: Saad, Walid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Massive multiple-input multiple-output (MIMO) and non-orthogonal multiple access (NOMA) are two key techniques for enabling massive connectivity in future wireless networks. A massive MIMO-NOMA system can deliver remarkable spectral improvements and low communication latency. Nevertheless, the uncontrollable stochastic behavior of the wireless channels can still degrade its performance. In this context, intelligent reflecting surface (IRS) has arisen as a promising technology for smartly overcoming the harmful effects of the wireless environment. The disruptive IRS concept of controlling the propagation channels via software can provide attractive performance gains to the communication networks, including higher data rates, improved user fairness, and, possibly, higher energy efficiency. In this article, in contrast to the existing literature, we demonstrate the main roles of IRSs in MIMO-NOMA systems. Specifically, we identify and perform a comprehensive discussion of the main performance gains that can be achieved in IRS-assisted massive MIMO-NOMA (IRS-NOMA) networks. We outline exciting futuristic use case scenarios for IRS-NOMA and expose the main related challenges and future research directions. Furthermore, throughout the article, we support our in-depth discussions with representative numerical results.
Analysis of Procurement Processes and Development of Recommendations for Intelligent Transportation Systems (Its) Procurements
Creators: name: Crabtree, Joseph D.
name: Frost, Christopher W.
name: Walton, Jennifer
name: Crossfield, John
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2007
Subjects: subject: Transportation Engineering

description: Traditional state procurement processes are not well-suited to the procurement of Intelligent Transportation Systems (ITS). The objective of this study was to analyze Kentucky’s existing procurement processes, identify strengths and weaknesses of each, and develop recommendations for a revised process (or processes) that would meet the unique requirements of ITS procurements. Four existing processes were identified, studied, documented, and assessed. The study also looked at design-build processes, both in Kentucky and in other states. Recommendations were developed for statutory changes to improve Kentucky’s ability to procure ITS technologies and systems.
Effect of Atomic Coherence on Absorption in Four-level Systems: an Analytical study
Creators: name: Sandhya, S N
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Absorption profile of a four-level ladder atomic system interacting with three driving fields is studied perturbatively and analytical results are presented. Numerical results where the driving field strengths are treated upto all orders are presented. The absorption features is studied in two regimes, i) the weak middle transition coupling, i.e. $Ω_2 << Ω_{1,3}$ and ii) the strong middle transition coupling $Ω_2 >>Ω_{1,3}$. In case i), it is shown that the ground state absorption and the saturation characteristics of the population of level 2 reveal deviation due to the presence of upper level couplings. In particular, the saturation curve for the population of level 2 shows a dip for $Ω_1 = Ω_3$. While the populations of levels 3 and 4 show a maxima when this resonance condition is satisfied. Thus the resonance condition provides a criterion for maximally populating the upper levels. A second order perturbation calculation reveals the nature of this minima (maxima). In the second case, I report two important features: a) Filtering of the Aulter-Townes doublet in the three-peak absorption profile of the ground state, which is achieved by detuning only the upper most coupling field, and b) control of line-width by controlling the strength of the upper coupling fields. This filtering technique coupled with the control of linewidth could prove to be very useful for high resolution studies.
description: 15 pages 12 figures
On regularization methods for inverse problems of dynamic type
Creators: name: Kindermann, S.
name: Leitao, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65J20, 47A52, 65J22

description: In this paper we consider new regularization methods for linear inverse problems of dynamic type. These methods are based on dynamic programming techniques for linear quadratic optimal control problems. Two different approaches are followed: a continuous and a discrete one. We prove regularization properties and also obtain rates of convergence for the methods derived from both approaches. A numerical example concerning the dynamic EIT problem is used to illustrate the theoretical results.
description: 24 pages, 3 figures
Numerically "exact" simulations of entropy production in the fully quantum regime: Boltzmann entropy versus von Neumann entropy
Creators: name: Sakamoto, Souichi
name: Tanimura, Yoshitaka
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a scheme to evaluate thermodynamic variables for a system coupled to a heat bath under a time-dependent external force using the quasi-static Helmholtz energy from the numerically "exact" hierarchical equations of motion (HEOM). We computed the entropy produced by a spin system strongly coupled to a non-Markovian heat bath for various temperatures. We showed that when changes to the external perturbation occurred sufficiently slowly, the system always reached thermal equilibrium. Thus, we calculated the Boltzmann entropy and the von Neumann entropy for an isothermal process, as well as various thermodynamic variables, such as changes of internal energies, heat, and work, for a system in quasi-static equilibrium based on the HEOM. We found that, although the characteristic features of the system entropies in the Boltzmann and von Neumann cases as a function of the system--bath coupling strength are similar, those for the total entropy production are completely different. The total entropy production in the Boltzmann case is always positive, whereas that in the von Neumann case becomes negative if we chose a thermal equilibrium state of the total system (an unfactorized thermal equilibrium state) as the initial state. This is because the total entropy production in the von Neumann case does not properly take into account the contribution of the entropy from the system--bath interaction. Thus, the Boltzmann entropy must be used to investigate entropy production in the fully quantum regime. Finally, we examined the applicability of the Jarzynski equality.
description: 25 pages, 4 figures
Towards Classification of Phase Transitions in Reaction--Diffusion Models
Creators: name: Elgart, Vlad
name: Kamenev, Alex
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Equilibrium phase transitions are associated with rearrangements of minima of a (Lagrangian) potential. Treatment of non-equilibrium systems requires doubling of degrees of freedom, which may be often interpreted as a transition from the ``coordinate'' to the ``phase'' space representation. As a result, one has to deal with the Hamiltonian formulation of the field theory instead of the Lagrangian one. We suggest a classification scheme of phase transitions in reaction-diffusion models based on the topology of the phase portraits of corresponding Hamiltonians. In models with an absorbing state such a topology is fully determined by intersecting curves of zero ``energy''. We identify four families of topologically distinct classes of phase portraits stable upon RG transformations.
description: 14 pages, 9 figures
Ökumenische Verstörungen. Oder: Wozu müssen wir aneinander festhalten?
Creators: name: Anders, Christoph
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 62 Nr. 3 (2013): Ökumenische Rundschau, Band 62, Heft 3
Twistor spinors with zero on Lorentzian 5-space
Creators: name: Leitner, Felipe
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C50, 53A30, 53C27, 58J70, 57S20

description: We present in this paper a $C^1$-metric on an open neighbourhood of the origin in $\RR^{5}$. The metric is of Lorentzian signature $(1,4)$ and admits a solution to the twistor equation for spinors with a unique isolated zero at the origin. The metric is not conformally flat in any neighbourhood of the origin. The construction is based on the Eguchi-Hanson metric with parallel spinors on Riemannian 4-space.
description: 17 pages
Microscopic Dynamics of Nonlinear Fokker-Planck Equations
Creators: name: Santos, Leonardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a new approach to describe the effective microscopic dynamics of (power-law) nonlinear Fokker-Planck equations. Our formalism is based on a nonextensive generalization of the Wiener process. This allow us to obtain, in addition to significant physical insights, several analytical results with great simplicity. Indeed, we obtain analytical solutions for a nonextensive version of Brownian free-particle and Ornstein-Uhlenbeck process, and explain anomalous diffusive behaviours in terms of memory effects in a nonextensive generalization of Gaussian white noise. Finally, we apply the develop formalism to model thermal noise in electric circuits.
Imagination as critical education : introducing theatre/drama into the maltese curriculum
Creators: name: Sammut, Carmel
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is the result of my personal search to find ways to harness the creative processes of participatory theatre and process drama to create a site for critical thinking. As a teacher in my home country, Malta, I realised the limitations of our educational system that does not cater to teachers who would like to use theatre/drama as learning/teaching mediums. The position of theatre/drama teacher does not exist within the Maltese education system. Therefore, I had to opt to travel to a foreign country to find an opportunity to combine the dynamics of theatre/drama with my teaching background. My experiences in using both process drama and participatory theatre have led me to conclude that there are many commonalties between the two creative processes. In the first chapter of this thesis, I compare the philosophies of process drama and participatory theatre and how the two can be combined to create a holistic and edifying experience for all participants. Moreover, I illustrate how different theatre directors engaged in collective creations have the same beliefs as drama in education practitioners: participants/actors in dramatic processes are to rely on inner resources and confront their own realities to construct a richer fictional world. The aim of the second chapter of this thesis is to show how theatre/drama can benefit the educational sphere. Drama/Theatre combine both consciousness and physicality and thus engage the whole being of the learner both at an interpersonal and intrapersonal level. Educational drama and theatre take into consideration the different learning styles of individuals and so involve the participant through aural, visual and kinaesthetic modes that enhance the possibility of new learning and critical awareness. After looking at the characteristics of the drama/theatre teacher in Chapter three, I then proceed to propose a program aimed at Maltese educators working with 11-16 year olds using both process drama and adapted participatory theatre techniques. I suggest a gamut of activities that focus on factual learning, personal development, awareness of social issues and development of communication and theatre skills. My intention is to include students from the initial phase of the process and then to present the co-created scenarios to other students. I would like to create an "open" performance where the voices of the audience can intermix with those of the actors. Finally, in my concluding chapter I take a closer look at the implications for the Maltese educational system if theatre/drama educators are introduced into individual schools. The advantages of having both a Theatre in Education team and drama/theatre educators are exposed and explored.
Phytochemical Analysis of Vasadrakshadi Kashaya
Creators: name: Dr.B Pooja Krishnan, Dr.K Ravindra Bhat, Dr. Waheeda Banu
Publisher: name: Zenodo
Year: 2024

description: Vasadrakshadi Kashaya is a Classical formulation mentioned in the text book Sharangadara samhita Kashaya Kalpana.1, commonly used for the management of Shwasa and Raktapitta. Vasa 2(Adathoda vasica) Draksha3 (Vitis vinifera) Haritaki 4(Terminalia chebula Retz.) are the contents. Inadequate standardization of polyherbal formulations causes difficulty in validation of the efficacy and maintaining quality of the product. Hence an attempt has been made to standardize the quality parameters of Vasadrakshadi Kashaya by determining total solids, Ph, loss of drying at 105 degree celcious, specific gravity at 25 degree celcious, identification of sugar, identification of alcohol, heavy metal limit test, microiological assay, HPTLC of haritaki was done.The data obtained in the present study will help as a reference document to maintain the quality standards of the formulation.
Solving the Bethe-Salpeter equation for a pseudoscalar meson in Minkowski space
Creators: name: Sauli, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A new method of solution of the Bethe-Salpeter equation for a pseudoscalar quark-antiquark bound state is proposed. With the help of an integral representation, the results are directly obtained in Minkowski space. Dressing of Green's functions is naturally taken into account, thus providing the possible inclusion of a running coupling constant as well as quark propagators. First numerical results are presented for a simplified ladder approximation.
Capillary-Gravity Water Waves: Modified Flow Force Formulation
Creators: name: Basu, Biswajit
name: Martin, Calin Iulian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The classical irrotational capillary-gravity water wave problem described by the Euler equations with a nonlinear free surface boundary condition over a flat bed is considered. A modified flow force has been defined and a new formulation of capillary-gravity waves in the framework of the modified flow force function has been developed. Using bifurcation theory, the local existence of waves of small amplitude is proved.
C-means Clustering Algorithm Based on Intuitionistic Fuzzy Sets and Its Application in Satisfaction Evaluation
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80108 Neural, Evolutionary and Fuzzy Computation
subject: FOS: Computer and information sciences

description: Due to the uncertainty and fuzziness of information, the traditional clustering analysis method sometimes cannot meet the requirement in practice. The clustering method based on intuitionistic fuzzy set has attracted more and more scholars’ attention nowadays. This paper discusses the intuitionistic fuzzy C-means clustering algorithm. The partition matrix is initialized by given conditions, and the cluster center matrix is obtained through the iterative computation between the object matrix and the partition matrix. The final results are achieved according to the membership degrees and non-membership degrees of the objects to the partition matrix. Several important parameters during the intuitionistic fuzzy C-means clustering process, such as the initial form of the partition matrix, the number of classification and the threshold of terminating the iteration, which significantly affect the clustering results, are analyzed and discussed. Finally, a case of customer satisfaction evaluation is illustrated by the intuitionistic fuzzy C-means clustering method, and the method is compared with the fuzzy C-means clustering method as well.
Finite temperature correlation function for one-dimensional Quantum Ising model: the virial expansion
Creators: name: Reyes, S. A.
name: Tsvelik, A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We rewrite the exact expression for the finite temperature two-point correlation function for the magnetization as a partition function of some field theory. This removes singularities and provides a convenient form to develop a virial expansion (the expansion in powers of soliton density).
description: 4 pages, 1 figure
Pregnancy complications and their association with postpartum depression symptoms: a retrospective study
Creators: name: Swart, Taliah
name: Shandley, Kerrie
name: Huynh, Minh
name: Brown, Christine M
name: Austin, David W
name: Bhowmik, Jahar
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4204
subject: Midwifery
classificationCode: 52
subject: Psychology
subject: FOS: Psychology

description: Objective: Postpartum depression affects around 17% of the women worldwide and has considerable implications for maternal and child health. While some risk factors have been identified, the association between pregnancy and delivery complications and postpartum depression is less well understood. This study aims to determine whether specific pregnancy complications are associated with risk of postpartum depression symptoms (PPDS). Method: This study analysed a subset of variables collected as part of a larger study exploring pregnancy circumstances and maternal-foetal health outcomes. Mothers residing in Australia provided information on their biological children aged 3–13 years. Pregnancy complications were analysed using bivariate analyses and binary logistic regression. Results: Mothers (N = 1,926) reported on N = 3,210 pregnancies (mean number of pregnancies = 1.27, SD = 0.97). At the time of childbirth, mothers were on average 30.1 years old (SD = 5.14). Experiencing a pregnancy complication increased the risk of PPDS (X2 = 16.45, df = 1, p < 0.001) However, logistic regression analyses indicated an increased risk of PPDS was associated with the specific pregnancy complications of cytomegalovirus (AOR = 7.06, 95% CI[1.51,32.98]), emergency caesarean (AOR = 1.67, 95% CI[1.31,2.12]), foetal distress before birth (AOR = 1.49, 95% CI[1.16,1.91]), induced labour (AOR = 1.55, 95% CI[1.25,1.91]) and placenta previa (AOR = 2.60, 95% CI[1.44,4.71]). Conclusion: Specific pregnancy complications were associated with PPDS, suggesting that some complications may pose a greater risk for PPDS than others. This study contributes to the growing understanding of peripartum risk factors for postpartum depression, and suggests that early clinical identification of at-risk mothers and early prophylactic and supportive care may be warranted to reduce that risk.
SWIGLAL: Python and Octave interfaces to the LALSuite gravitational-wave data analysis libraries
Creators: name: Wette, Karl
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The LALSuite data analysis libraries, written in C, implement key routines critical to the successful detection of gravitational waves, such as the template waveforms describing the merger of two black holes or two neutron stars. SWIGLAL is a component of LALSuite which provides interfaces for Python and Octave, making LALSuite routines accessible directly from scripts written in those languages. It has enabled modern gravitational-wave data analysis software, used in the first detection of gravitational waves, to be written in Python, thereby benefiting from its ease of development and rich feature set, while still having access to the computational speed and scientific trustworthiness of the routines provided by LALSuite.
description: 16 pages, 4 figures; preprint of published article
COPOD: Copula-Based Outlier Detection
Creators: name: Li, Zheng
name: Zhao, Yue
name: Botta, Nicola
name: Ionescu, Cezar
name: Hu, Xiyang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Outlier detection refers to the identification of rare items that are deviant from the general data distribution. Existing approaches suffer from high computational complexity, low predictive capability, and limited interpretability. As a remedy, we present a novel outlier detection algorithm called COPOD, which is inspired by copulas for modeling multivariate data distribution. COPOD first constructs an empirical copula, and then uses it to predict tail probabilities of each given data point to determine its level of "extremeness". Intuitively, we think of this as calculating an anomalous p-value. This makes COPOD both parameter-free, highly interpretable, and computationally efficient. In this work, we make three key contributions, 1) propose a novel, parameter-free outlier detection algorithm with both great performance and interpretability, 2) perform extensive experiments on 30 benchmark datasets to show that COPOD outperforms in most cases and is also one of the fastest algorithms, and 3) release an easy-to-use Python implementation for reproducibility.
description: Proceedings of the 2020 International Conference on Data Mining (ICDM)
Weakly-supervised Learning For Catheter Segmentation in 3D Frustum Ultrasound
Creators: name: Yang, Hongxu
name: Shan, Caifeng
name: Kolen, Alexander F.
name: de With, Peter H. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Accurate and efficient catheter segmentation in 3D ultrasound (US) is essential for cardiac intervention. Currently, the state-of-the-art segmentation algorithms are based on convolutional neural networks (CNNs), which achieved remarkable performances in a standard Cartesian volumetric data. Nevertheless, these approaches suffer the challenges of low efficiency and GPU unfriendly image size. Therefore, such difficulties and expensive hardware requirements become a bottleneck to build accurate and efficient segmentation models for real clinical application. In this paper, we propose a novel Frustum ultrasound based catheter segmentation method. Specifically, Frustum ultrasound is a polar coordinate based image, which includes same information of standard Cartesian image but has much smaller size, which overcomes the bottleneck of efficiency than conventional Cartesian images. Nevertheless, the irregular and deformed Frustum images lead to more efforts for accurate voxel-level annotation. To address this limitation, a weakly supervised learning framework is proposed, which only needs 3D bounding box annotations overlaying the region-of-interest to training the CNNs. Although the bounding box annotation includes noise and inaccurate annotation to mislead to model, it is addressed by the proposed pseudo label generated scheme. The labels of training voxels are generated by incorporating class activation maps with line filtering, which is iteratively updated during the training. Our experimental results show the proposed method achieved the state-of-the-art performance with an efficiency of 0.25 second per volume. More crucially, the Frustum image segmentation provides a much faster and cheaper solution for segmentation in 3D US image, which meet the demands of clinical applications.
Light quark Yukawas in triboson final states
Creators: name: Falkowski, Adam
name: Ganguly, Sanmay
name: Gras, Phillippe
name: No, Jose Miguel
name: Tobioka, Kohsaku
name: Vignaroli, Natascia
name: You, Tevong
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Triple heavy vector boson production, $p p \to VVV$ $(V = W, Z)$, has recently been observed for the first time. We propose that precision measurements of this process provide an excellent probe of the first generation light quark Yukawa couplings. Modified quark interactions with the off-shell Higgs in this process lead to a rapid growth of the partonic cross sections with energy, which manifests in an enhanced $p_T$ distribution of the final state leptons and quarks. We quantify this effect and estimate the present and future 2$σ$ sensitivity to the up, down, and strange Yukawas. In particular, we find that HL-LHC can reach $\mathcal{O}(400)$ sensitivity to the down Yukawa relative to the Standard Model value, improving the current sensitivity in this process by a factor of $10$, and which can be further improved to $\mathcal{O}(30)$ at FCC-hh. This is competitive with and complementary to constraints from global fits and other on-shell probes of the first generation Yukawas. The triboson sensitivity at HL-LHC corresponds to probing dimension-6 SMEFT operators suppressed by an $\mathcal{O}(1)$ TeV scale, similarly to other LHC Higgs probes.
description: 22 pages, 6 figures
Remarks on Heavy-Light Mesons from AdS/CFT
Creators: name: Herzog, Christopher P.
name: Stricker, Stefan A.
name: Vuorinen, Aleksi
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the AdS/CFT correspondence to compute the energy spectrum of heavy-light mesons in a N=2 SU(N) super Yang-Mills theory with two massive hypermultiplets. In the heavy quark limit, similar to QCD, we find that the excitation energies are independent of the heavy quark mass. We also make some remarks about related AdS/CFT models of flavor with less supersymmetry.
description: 29 pages, 9 figures; v2 section 5 rewritten to include discussion of long strings, other minor improvements, ref added
Richness estimation with species identity error
Creators: name: Yen, Jai-Hua
name: Chiu, Chun-Huo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Richness estimation of an interesting area is always a challenge statistical work due to small sample size or species identity error. In the literatures, most richness estimators were only proposed to tackle the underestimation of the size-limited sample. However, species identity error almost occurs in each species survey and seriously reduces the accuracy of observed, singleton, and doubleton richness in turns to influence the behavior of richness estimator. Therefore, to estimate the true richness, the biased collected data due to species identity error should be modified before processing the richness estimation work. In the manuscript, we propose a new approach to correct the bias of richness estimation due to species identity error. First, a species list inventory from a subplot obtained by the investigator was used to estimate the species identity error rate. Then, we can correct the biased observed, singleton, and doubleton richness of the raw sampling data from the interesting area. Finally, the richness estimators proposed in the literature could be supplied to get the more correct estimates based on adjusted observed data. To investigate the behavior of the proposed method, we performed simulations by generating data sets from various species models with different species identity error rates. For the purpose of illustration, the real data was supplied to demonstrate our proposed approach. A presence/absence weeds species was surveyed in the organic farmland located at Soft Bridge County in the North of Taiwan.
description: 6 pages, ISI WSC 2019 conference
A Cognitive Approach based on the Actionable Knowledge Graph for supporting Maintenance Operations
Creators: name: Fenza, Giuseppe
name: Gallo, Mariacristina
name: Loia, Vincenzo
name: Marino, Domenico
name: Orciuoli, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In the era of Industry 4.0, cognitive computing and its enabling technologies (Artificial Intelligence, Machine Learning, etc.) allow to define systems able to support maintenance by providing relevant information, at the right time, retrieved from structured companies' databases, and unstructured documents, like technical manuals, intervention reports, and so on. Moreover, contextual information plays a crucial role in tailoring the support both during the planning and the execution of interventions. Contextual information can be detected with the help of sensors, wearable devices, indoor and outdoor positioning systems, and object recognition capabilities (using fixed or wearable cameras), all of which can collect historical data for further analysis. In this work, we propose a cognitive system that learns from past interventions to generate contextual recommendations for improving maintenance practices in terms of time, budget, and scope. The system uses formal conceptual models, incremental learning, and ranking algorithms to accomplish these objectives.
The power of low associativity
Creators: name: Tagliavini Ponce, Guido
Publisher: name: No Publisher Supplied
Year: 2023

description: One of the oldest and most fundamental data structures in computer science is the hash table, which can store a collection of key-value pairs subject to insertions, deletions and queries. The best hash tables can have a number of performance guarantees, such as time efficiency, space efficiency and cache efficiency. Two desirable hash table properties that are targeted for optimization less often are low associativity and stability. A hash table has low associativity when each key may only be hashed into one of few slots in the table; and it is stable when the key-value pairs are not moved around once they are inserted in the table. This thesis studies the power of low associativity and stability as principles for hash table design and, more broadly, for system design. We first present a new hash table design that improves the state of the art on multiple fronts. This is the first stable hash table that achieves essentially optimal time, space and cache efficiency; and, additionally, it has low associativity. We then put our theory on hash tables to work in other areas of data structures and systems, most notably to design a new virtual memory system that has an order-of-magnitude larger TLB reach (i.e., the number of virtual address translations that a TLB can hold) than a baseline page-based virtual memory. This and other applications of our theory exploit an interesting connection between associativity and pointers: the lower the associativity of the underlying hash table, the fewer bits are needed to describe the position of an item in the table. We also study other problems related to associativity in set-associative caches, and distributed databases. What is exciting about our theorems is that they provide actionable insights that system researchers and designers can use to achieve tighter performance.
Relevance of Longitudinal Fields of Paraxial Optical Vortices
Creators: name: Forbes, Kayn A.
name: Green, Dale
name: Jones, Garth A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Longitudinal electromagnetic fields generally become comparable with the usually dominant transverse components in strongly-focussed, non-paraxial beams. For optical vortex modes it is highlighted here how their angular momentum properties produce longitudinal fields that in general must be accounted for, even within the paraxial regime. First-order longitudinal components of quantized Laguerre-Gaussian modes are derived and numerically studied with respect to the paraxial parameter, highlighting light-matter and spin-orbit interactions that stem from longitudinal fields of weakly-focussed, paraxial beams in free space. New restrictions are cast on the validity of the paraxial approximation for optical vortices interacting with atoms, molecules and other nanostructures.
Amitermes amicki Scheffrahn 1999
Creators: name: Rocha, Mauricio M.
name: Cancello, Eliana M.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Isoptera
Termitidae
Amitermes
Amitermes amicki

description: Amitermes amicki Scheffrahn, 1999
 Soldier (Figs. 1A, 1B): Described by Scheffrahn et al. (1999); additional illustrations are provided here.
Gut anatomy (Fig. 2): Crop asymmetrical, with oesophagous insertion displaced to left side. Stomodeal valve inserted in apex of mesenteron. Mesenteric tongue internal to mesenteric arch, narrower proximally and gradually enlarging to tip, ending before dilated portion of first proctodeal segment (P1) (Fig. 2D). P1 fusiform, crossing abdomen diagonally in dorsal view, over paunch (P3), and inserted in P3 at right side of abdomen (Fig. 2B, arrow). P3 well developed and globose. Isthmus clearly recognizable. Fourth proctodeal segment (P4) with short U-turn and slightly displaced to right side of body (Figs. 2A, 2B).
 Material examined. VENEZUELA. Falcón. La Cruz de Taratara: 28.v.2008, R. H. Scheffrahn & collaborators (27470).
 Comments. We could not observe the internal cuticular structures (gizzard, enteric valve and P1 cuticular architecture), as only one worker was available to dissect.
description: Published as part of Rocha, Mauricio M. & Cancello, Eliana M., 2020, Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers, pp. 75-104 in Zootaxa 4751 (1) on page 76, DOI: 10.11646/zootaxa.4751.1.4, http://zenodo.org/record/3711794
The Normalized Singular Value Decomposition of Non-Symmetric Matrices Using Givens fast Rotations
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: In this paper we introduce the algorithm and the fixed point hardware to calculate the normalized singular value decomposition of a non-symmetric matrices using Givens fast (approximate) rotations. This algorithm only uses the basic combinational logic modules such as adders, multiplexers, encoders, Barrel shifters (B-shifters), and comparators and does not use any lookup table. This method in fact combines the iterative properties of singular value decomposition method and CORDIC method in one single iteration. The introduced architecture is a systolic architecture that uses two different types of processors, diagonal and non-diagonal processors. The diagonal processor calculates, transmits and applies the horizontal and vertical rotations, while the non-diagonal processor uses a fully combinational architecture to receive, and apply the rotations. The diagonal processor uses priority encoders, Barrel shifters, and comparators to calculate the rotation angles. Both processors use a series of adders to apply the rotation angles. The design presented in this work provides 2.83 ∼ 649 times better energy per matrix performance compared to the state of the art designs. This performance achieved without the employment of pipelining; a better performance advantage is expected to be achieved employing pipelining.
Systematic effects induced by a flat isotropic dielectric slab
Creators: name: Macculi, Claudio
name: Zannoni, Mario
name: Peverini, Oscar Antonio
name: Carretti, Ettore
name: Tascone, Riccardo
name: Cortiglioni, Stefano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The instrumental polarization induced by a flat isotropic dielectric slab in microwave frequencies is faced. We find that, in spite of its isotropic nature, such a dielectric can produce spurious polarization either by transmitting incoming anisotropic diffuse radiation or emitting when it is thermally inhomogeneous. We present evaluations of instrumental polarization generated by materials usually adopted in Radioastronomy, by using the Mueller matrix formalism. As an application, results for different slabs in front of a 32 GHz receiver are discussed. Such results are based on measurements of their complex dielectric constant. We evaluate that a 0.33 cm thick Teflon slab introduces negligible spurious polarization ($< 2.6 \times 10^{-5}$ in transmission and $< 6 \times 10^{-7}$ in emission), even minimizing the leakage ($< 10^{-8}$ from $Q$ to $U$ Stokes parameters, and viceversa) and the depolarization ($\sim 1.3 \times 10^{-3}$).
description: Accepted for pubblication in Applied Optics, 32 pages, 14 figures (N. 37 ".png", ".bb"). Better quality figures available from author upon request
Disposal of Bridge Paint Residue
Creators: name: Hopwood, Theodore
name: Palle, Sudhir
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2005
Subjects: subject: Transportation Engineering

description: Paint residue generated by bridge maintenance painting commonly contains lead requiring the residue to be disposed of as a hazardous waste. Several alternatives are being investigated in this study, chemical stabilization and recycling as options for the Kentucky Transportation Cabinet (KYTC) to consider in addressing the waste stream generated by bridge maintenance painting operations.  In the initial portion of this study, four chemical stabilization materials were identified as candidates for xperimental/demonstration projects entailing maintenance painting. A recycling option was also provided. An experimental bridge painting project was let by KYTC to investigate the use of two chemical stabilizers and the recycling option. The results of that effort are discussed including chemical analyses, progress of work, and resulting costs. Recommendations are provided for additional testing of chemical stabilizers.
Applications of Feedback Control in Quantum Systems
Creators: name: Jacobs, Kurt
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We give an introduction to feedback control in quantum systems, as well as an overview of the variety of applications which have been explored to date. This introductory review is aimed primarily at control theorists unfamiliar with quantum mechanics, but should also be useful to quantum physicists interested in applications of feedback control. We explain how feedback in quantum systems differs from that in traditional classical systems, and how in certain cases the results from modern optimal control theory can be applied directly to quantum systems. In addition to noise reduction and stabilization, an important application of feedback in quantum systems is adaptive measurement, and we discuss the various applications of adaptive measurements. We finish by describing specific examples of the application of feedback control to cooling and state-preparation in nano-electro-mechanical systems and single trapped atoms.
description: Plenary paper for ASCC06. Gives an introductory review of the field
A global analysis of atmospheric refractivity anomalies using CHAMP data
Creators: name: Adame, Erick
name: Kuo, Ying-Hwa
name: Gordon, Nicole
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2005

In early 2006, the US-Taiwan joint satellite mission known as the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) will launch six Low Earth Orbit (LEO) satellites. These satellites, each equipped with an advanced Global Positioning System (GPS) receiver, will use radio occultation (RO) limb sounding technology to profile the Earth's atmosphere with unprecedented accuracy and vertical resolution. The GPS RO soundings available from COSMIC will make significant contributions to global weather prediction, ionospheric research, and climate monitoring. The GPS receivers will measure the phase and amplitude. From that we can deduce the bending angles as a function of height, and obtain vertical profiles of refractivity using the Abel inversion under the local spherical symmetry assumption. To demonstrate the potential value of GPS RO data in climate research, we analyzed atmospheric refractivity obtained from GPS RO data in a recent single-satellite German mission, known as the CHAllenging Mini Payload for Geophysical Research and Application (CHAMP). This study examined the refractivity anomalies by altitude and latitude per season of CHAMP GPS RO data, provided by UCAR's COSMIC Data Analysis and Archive Center (CDAAC), from May 2001 through present. Refractivity anomalies across the globe were illustrated in color plots that identified any persistent anomaly patterns. A structure has been identified over the tropical stratosphere from 20-30km, which may have a possible relationship with the Quasi-Biennial Oscillation (QBO). Results show that GPS refractivity data can be used to identify specific trends between seasons as well as identify multi-year phenomenon such as QBO. This study highlights the usefulness of refractivity values from GPS RO data in climate research.
Trace elements : an art school in New Westminster
Creators: name: Wallace, Andrew William
Publisher: name: University of British Columbia
Year: 2009

description: The physical traces left behind by the passage of lives constitute a form of collective memory; they are the tell-tale signs that suggest to us how things have come to be the way they are, remind us of they way they used to be, and suggest how they might become in the future. The physical world selects objects for preservation according to a capricious set of rules, choosing not only the extraordinary and the notable, but also the ordinary and the seemingly insignificant. When these traces of our experience are permitted to remain, places of extraordinary richness begin to develop, where heritage is not manufactured, but is allowed to evolve. Taking this process as a starting point, this Graduation Project began as an investigation into the reciprocal relationships that can exist between new architecture and its physical and historical contexts. It explores ways in which a new building can both affect and be affected by the residual traces of circumstances and activities that have occurred in a place over time, excavating and preserving the history of place, and sustaining this history by adding a new layer of meaning and form to an existing site. In the search to determine ways in which these time scales intermesh and layer within a set of spaces, another investigation occurred, into the relationships between form, scale, light, activity and the perception and experience of time. The site chosen for this project is a building lot on Columbia Street in New Westminster, containing the ruins of a commercial building dating from 1898. The programme was for an art college, containing a gallery, a lecture theatre, a library, offices and studios. In the design of a new building for this site, a number of existing elements were identified for their potential to suggest either aspects of the site's history or the design of new spaces: an old brick retaining wall whose bricked-in doorways suggest spaces underneath the adjacent street, a stone door-step recalling an entrance, a fragment of stone from an even older building that once stood on this site. New spaces were then ordered, both in relation to these found elements, and in relation to each other, based particularly on the ways in which they suggest and respond to the passage of time. An play of affinities and contrasts was established, whereby spaces are simultaneously related to, but distinguished from one another. The design of this building was therefore determined not only as a reaction to a given set of circumstances, but as a consideration of the ways in which the passage of time, both historical and daily, might be manipulated as an architectural element.
D6.4 User interface evaluation report
Creators: name: De Clerck, Michiel
Publisher: name: Zenodo
Year: 2020
Subjects: User evaluation
Data discovery
Integrated search
Data enrichment
Data aggregation
Federated search

description: This deliverable consists of a report on relevant aspects, views, and results of user experience and lessons learned by project partners involved in the testing of the user interface of the ReIReS unified discovery environment, referred to as ReIReSearch, as well as views on future extensions and exploitation opportunities.