cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Valid inequalities, preprocessing, and an effective heuristic for the uncapacitated three-level lot-sizing and replenishment problem with a distribution structure
Creators: name: Cunha, Jesus O.
name: Melo, Rafael A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider the uncapacitated three-level lot-sizing and replenishment problem with a distribution structure. In this NP-hard problem, a single production plant sends the produced items to replenish warehouses from where they are dispatched to the retailers in order to satisfy their demands over a finite planning horizon. The goal of the problem is to determine an integrated production and distribution plan minimizing the total costs, which comprehends fixed production and transportation setup as well as variable inventory holding costs. We describe new valid inequalities both in the space of a standard mixed integer programming (MIP) formulation and in that of a new alternative extended MIP formulation. We show that using such extended formulation, valid inequalities having similar structures to those in the standard one allow achieving tighter linear relaxation bounds. Furthermore, we propose a preprocessing approach to reduce the size of a multi-commodity MIP formulation and a multi-start randomized bottom-up dynamic programming based heuristic. Computational experiments indicate that the use of the valid inequalities in a branch-and-cut approach significantly increase the ability of a MIP solver to solve instances to optimality. Additionally, the valid inequalities for the extended formulation outperform those for the standard one in terms of number of solved instances, running time and number of enumerated nodes. Moreover, the proposed heuristic is able to generate solutions with considerably low optimality gaps within very short computational times even for large instances. Combining the preprocessing approach with the heuristic, one can achieve an increase in the number of solutions solved to optimality within the time limit together with significant reductions on the average times for solving them.
Active learning metamodelling for survival rate analysis of simulated emergency medical systems
Creators: name: Antunes, Francisco
name: Amorim, Marco
name: Pereira, Francisco
name: Ribeiro, Bernardete
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified

description: Emergency Medical Services (EMS) constitute a crucial pillar of today's cities by providing urgent medical responses to their citizens. Their study is often conducted via simulation, as the assessment of planning decisions is generally unfeasible in the existing systems. However, such models can become computationally expensive to run. Thus, metamodels can be used to approximate the simulation results. In this work, a simulation metamodelling strategy supported on an active learning scheme is proposed to analyse the survival rate of a simulated EMS. The exploration process is guided through a series of grids towards simulation input regions whose output results match a specific survival rate defined a priori. This provides an efficient way of exploring the search space by channelling the computational effort to the most important input values, supporting the advantages of these methodologies in the EMS field, where their application is still seldom to the best of our knowledge.
The coalescent effective size of age-structured populations
Creators: name: Sagitov, Serik
name: Jagers, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 92F25, 60J70 (Primary) 92D15, 60F17. (Secondary)

description: We establish convergence to the Kingman coalescent for a class of age-structured population models with time-constant population size. Time is discrete with unit called a year. Offspring numbers in a year may depend on mother's age.
description: Published at http://dx.doi.org/10.1214/105051605000000223 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Planning delivery-by-drone micro-fulfilment centres
Creators: name: Lamb, J. S.
name: Wirasinghe, S. C.
name: Waters, N. M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: Medicine
Biotechnology
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy

description: Delivery drones are a disruptive technology that is spurring logistics system change, such as the adoption of urban micro-fulfilment centres (MFCs). In this paper, we develop and implement a two-stage continuum approximation (CA) model of this disruptive system in a geographic information system. The model includes common CA techniques at a local level to minimise cost, and then these local solutions are used in a second stage regional location-allocation multiple knapsack problem. We then compare the drone MFC system to a traditional delivery-by-van system and investigate potential cost or emissions savings by adjusting time-window demand, logistical sprawl, electric van alternatives, and MFC emissions. Furthermore, we conduct a sensitivity analysis to show that uncertainty in demand and effective storage density both significantly influence the number of MFCs selected and benchmark our model against commercial solvers. This methodology may also be further developed and applied to other new delivery vehicle modes.
Rate processes with non-Markovian dynamical disorder
Creators: name: Goychuk, Igor
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Rate processes with dynamical disorder are investigated within a simple framework provided by unidirectional electron transfer (ET) with fluctuating transfer rate. The rate fluctuations are assumed to be described by a non-Markovian stochastic jump process which reflects conformational dynamics of an electron transferring donor-acceptor molecular complex. A tractable analytical expression is obtained for the relaxation of the donor population (in the Laplace-transformed time domain) averaged over the stationary conformational fluctuations. The corresponding mean transfer time is also obtained in an analytical form. The case of two-state fluctuations is studied in detail for a model incorporating substate diffusion within one of the conformations. It is shown that an increase of the conformational diffusion time results in a gradual transition from the regime of fast modulation characterized by the averaged ET rate to the regime of quasi-static disorder. This transition occurs at the conformational mean residence time intervals fixed much less than the inverse of the corresponding ET rates. An explanation of this paradoxical effect is provided. Moreover, its presence is also manifested for the simplest, exactly solvable non-Markovian model with a biexponential distribution of the residence times in one of the conformations. The nontrivial conditions for this phenomenon to occur are found.
Product Market Competition and Human Resource Practices: An Analysis of the Retail Food Sector
Creators: name: Davis, Elizabeth E.
name: Freedman, Matthew
name: Lane, Julia
name: McCall, Brian P.
name: Nestoriak, Nicole
name: Park, Timothy A.
name: Davis, Elizabeth E.
name: Freedman, Matthew
name: Lane, Julia
name: McCall, Brian P.
name: Nestoriak, Nicole
name: Park, Timothy A.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: supermarkets
subject: human resource practices
subject: competition
subject: internal labor market
subject: wage growth

description: The rise of super-centers and the entry of Wal-Mart into food retailing have dramatically altered the competitive environment in the industry. This paper explores the impact of such changes on the labor market practices of traditional food retailers. We use longitudinal data on workers and firms to construct new measures of compensation and employment, and examine how these measures evolve within and across firms in response to changes in product market structure. An additional feature of the analysis is to combine rich case study knowledge about the retail food industry with the new matched employer-employee data from the Census Bureau.
KEY DEVELOPMENTS IN THE FOOD DISTRIBUTION SYSTEM
Creators: name: Larson, Ronald B.
name: Larson, Ronald B.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: Supercenter
subject: Membership Club
subject: New Products
subject: Private Label
subject: Supermarket
subject: Retailing
subject: Efficient Consumer Response
subject: Efficient Foodservice Response
subject: Food Spending

description: Many changes are occurring in food retailing. Forces driving these changes include the sales gains by supercenter, membership club, and convenience stores, the growing popularity of foodservice, the expansion of private label products (and the response by branded food manufacturers), and the identification of new consumer interests and concerns. These forces encouraged food processors, distributors, and retailers to improve the efficiency of the food distribution system. The Efficient Consumer Response and Efficient Foodservice Response initiatives are designed to lower the costs to move products through the system. These developments in the food distribution system have several important implications for other food and agricultural businesses.
Azimuthal eigenmodes at strongly non-degenerate parametric down-conversion
Creators: name: Dvernik, Lev S.
name: Prudkovskii, Pavel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum-optical technologies based on parametric light down-conversion are not yet applied in the terahertz frequency range. This is owing to the complexity of detecting single photons in the terahertz frequency range and the strong entanglement of modes of optical-terahertz biphotons. This study investigates the angular structure of scattered radiation generated by strongly non-degenerate parametric down-conversion when the frequency of the idler radiation does not exceed several terahertz. We demonstrate that under certain approximations, it is possible to obtain azimuthal eigenmodes for the nonlinear-interaction operator. The solution of the evolution equations for the field operators in these eigenmodes has the form of the Bogolyubov transformation, which allows a scattering matrix to be obtained for arbitrary values of the parametric gain. This scattering matrix describes both the production of biphoton pairs and the generation of intense fluxes of correlated optical-terahertz fields that form a macroscopic quantum state of radiation in two spectral ranges.
description: 13 pages, 4 figures
Singular Poisson reduction of cotangent bundles
Creators: name: Hochgerner, Simon
name: Rainer, Armin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D17, 53D20

description: We consider the Poisson reduced space $(T^*Q)/K$ with respect to a cotangent lifted action. It is assumed that $K$ is a compact Lie group which acts by isometries on the Riemannian manifold $Q$ and that the action on $Q$ is of single isotropy type. Realizing $(T^*Q)/K$ as a Weinstein space we determine the induced Poisson structure and its symplectic leaves. We thus extend the Weinstein construction for principal fiber bundles to the case of surjective Riemannian submersions $Q\to Q/K$.
description: 28 pages
The line-of-sight velocity distributions of intracluster planetary nebulae in the Virgo cluster core
Creators: name: Arnaboldi, Magda
name: Gerhard, Ortwin
name: Aguerri, J. Alfonso L.
name: Freeman, Kenneth C.
name: Napolitano, Nicola R.
name: Okamura, Sadanori
name: Yasuda, Naoki
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radial velocities of 40 intracluster planetary nebulae (ICPNe) in the Virgo cluster were obtained with the new multi-fiber FLAMES spectrograph on UT2 at VLT. For the first time, the lambda 4959 AA line of the [OIII] doublet is seen in a large fraction (50%) of ICPNe spectra, and a large fraction of the photometric candidates with m(5007)
description: 4 pages, 3 figures
(11-3-2021) Kraken2 database for testing in nf-core pikavirus-
Creators: name: Cordero, Guillermo Jorge Gorines
Publisher: name: Zenodo
Year: 2021

description: Kraken2 database created with only 4 genome assemblies, for testing purposes in the test profile of nf-core pikavirus. - Homo sapiens (GCF_000001405.39), taxid: 9606 -Pseudomonas aeruginosa (GCF_000006765.1), taxid: 208964 -Saccharomyces cerevisiae (GCF_000146045.2), taxid: 559292 -Human alphaherpesvirus type 1 (GCF_000859985.2), taxid: 10298 Parameters for the construction of the database were kraken2 standard (date: 11-3-2021). Database can be directly generated through the file "create_db_ test_kraken2.sh".
Randomness for quantum channels:Genericity of catalysis and quantum advantage of uniformness
Creators: name: Lie, Seok Hyung
name: Jeong, Hyunseok
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Randomness can help one to implement quantum maps that cannot be realized in a deterministic fashion. Recently, it was discovered that explicitly treating a randomness source as a quantum system could double the efficiency as a catalyst for some tasks. In this work, we first show that every quantum channel that can be implemented with a randomness source without leaking information to it must be a catalysis. For that purpose, we prove a new no-go theorem that generalizes the no-hiding theorem, the no-secret theorem that states no quantum information can be shared with other system as a secret without leaking some information. Second, we show that non-degenerate catalysts should be used classically when no extra dimension is allowed, which leads to the fact that the quantum advantage of a catalytic process strictly comes from the uniformness of the randomness source. Finally, we discuss a method to circumvent the previous result that achieves quantum advantage with non-degenerate catalyst uniformized by employing extra work space.
description: 9 pages, 3 figures; close to the version accepted in Physical Review Research
James K. Hoffmeier: Akhenaten and the Origins of Monotheism
Creators: name: Lagarce-Othman, Bérénice
Publisher: name: Ruhr-Universität Bochum
Year: 2016

description: This contribution offers a review of:

James K. Hoffmeier: Akhenaten and the Origins of Monotheism
Oxford University Press, 2015.
312 pages, £37.49, ISBN: 9780199792085.
description: Entangled Religions, Vol 3 (2016)
How Should America's Anti-Terrorism Budget Be Allocated? Findings from a National Survey of Attitudes of U.S. Residents about Terrorism
Creators: name: Stinson, Thomas F.
name: Kinsey, Jean D.
name: Degeneffe, Dennis J.
name: Ghosh, Koel
name: Stinson, Thomas F.
name: Kinsey, Jean D.
name: Degeneffe, Dennis J.
name: Ghosh, Koel
Publisher: name: Unknown
Year: 2006
Subjects: Political Economy

description: U.S. residents are very concerned about future terrorist attacks and they are willing to commit substantial sums to prevent further terrorist acts. Protecting against another 9/11 style incident is important, but U.S. residents are more concerned about protecting the food supply system and preventing release of chemical or biological agents in public areas. On average respondents would allocate 13.3 percent more to protect the food supply chain and 12.0 percent more to protect against release of a toxic chemical or biological agent than they would to protect against another terrorist attack using hijacked aircraft. Approximately $5 billion is currently spent to protect civil aviation. The 2006 budget provided $8.6 billion of fiscal authority for programs protecting against all types of catastrophic terrorist incidents, including protection against radiological or nuclear incidents, as well as protecting the food supply and preventing chemical or biological attacks. No one would argue that decisions on the size and internal allocation of the nation's homeland security budget should be made on the basis of a public opinion survey, but this survey indicates that Americans would likely support additional spending to defend the food system and protect against release of a chemical or biological agent.
X-ray Emissions from Three-dimensional Magnetohydrodynamic Coronal Accretion Flows
Creators: name: Kawanaka, Norita
name: Kato, Yoshiaki
name: Mineshige, Shin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the radiation spectrum and its time variability of the black hole accretion disk-corona system based on the three-dimensional magnetohydrodynamic simulation. In explaining the spectral properties of active galactic nuclei (AGNs), it is often assumed that they consist of a geometrically thin, optically thick disk and hot, optically thin corona surrounding the thin disk. As for a model of the corona, we adopt the simulation data of three-dimensional, non-radiative MHD accretion flows calculated by Kato and coworkers, while for a thin disk we assume a standard type disk. We perform Monte Carlo radiative transfer simulations in the corona, taking into account the Compton scattering of soft photons from the thin disk by hot thermal electrons and coronal irradiation heating of the thin disk, which emits blackbody radiation. By adjusting the density parameter of the MHD coronal flow, we can produce the emergent spectra which are consistent with those of typical Seyfert galaxies. Moreover, we find rapid time variability in X-ray emission spectra, originating from the density fluctuation produced by the magnetorotational instability in the MHD corona. The features of reflection component including iron fluorescent line emission are also briefly discussed.
description: accepted to Publications of the Astronomical Society of Japan
Anomaly Inflow and Holography
Creators: name: Hong, Sungwoo
name: Rigo, Gabriele
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We systematically study the anomaly inflow by the bulk Chern-Simons (CS) theory in a slice of five-dimensional anti-de Sitter spacetime ($\text{AdS}_5$). The introduction of UV and IR 3-branes makes the anomaly story remarkably rich and many interesting aspects can be obtained, including weakly gauging and spontaneous symmetry breaking of the global symmetries of the dual 4D CFT. Our main contribution is to provide a unified and comprehensive discussion of the subject, together with a detailed description of the dual CFT picture for each case. Employing a gauge-fixed effective action suitable for a holographic study, we reproduce many known results in the literature, such as 't Hooft anomaly matching for unbroken symmetry (Neumann IR-BC) and (gauged) Wess-Zumino-Witten (WZW) action for broken symmetry (IR-BC breaks the bulk group $G \to H$). In addition, we show that anomaly matching occurs for ABJ anomalies as well as 't Hooft anomalies, which suggests anomalies inflowed from the bulk CS theory are necessarily free of mixed anomalies with the confining gauge force of the 4D dual CFT. In the case of broken symmetry, we prove that the "would-be" Goldstone bosons associated with the weakly gauged symmetry are completely removed by a proper field redefinition, provided the anomaly from the bulk is exactly cancelled by the boundary contribution, hence confirming the standard expectation. Moreover, we present a holographic formulation of Witten's argument for the quantization condition for the WZW action, and argue in favor of an alternative way to obtain the same condition using a "deformed" theory (different BCs). We work out several examples, including a product group with mixed anomaly, and identify the corresponding dual CFT picture. We consider a fully general case typically arising in the context of dynamical electroweak symmetry breaking.
description: 34+17 pages
Limits to the muon flux from neutralino annihilations in the Sun with the AMANDA detector
Creators: name: The AMANDA Collaboration
name: Ackermann, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A search for an excess of muon-neutrinos from neutralino annihilations in the Sun has been performed with the AMANDA-II neutrino detector using data collected in 143.7 days of live-time in 2001. No excess over the expected atmospheric neutrino background has been observed. An upper limit at 90% confidence level has been obtained on the annihilation rate of captured neutralinos in the Sun, as well as the corresponding muon flux limit at the Earth, both as functions of the neutralino mass in the range 100 GeV-5000 GeV.
description: 13 pages, 3 figures. Submitted to Astropart. Phys
CHANGES IN RETAIL FOOD DELIVERY: SIGNALS FOR PRODUCERS, PROCESSORS AND DISTRIBUTORS
Creators: name: Kinsey, Jean D.
name: Senauer, Benjamin
name: King, Robert P.
name: Phumpiu, Paul F.
name: Kinsey, Jean D.
name: Senauer, Benjamin
name: King, Robert P.
name: Phumpiu, Paul F.
Publisher: name: Unknown
Year: 1996
Subjects: Agribusiness
Industrial Organization

description: This paper contains two chapters related to changes in retail food delivery and sales. The first discusses trends in consumer demographics and lifestyles and how these continue to drive changes in the way food is prepared and delivered to consumers. Retail stores are responding with new formats: providing more ready to eat foods; more convenient store layouts; lower prices and better service in niche markets across the country. Their demands send signals up the food chain to processors and producers that alter their production and inventory decisions. Electronic information technology speeds these changes and leads to more efficient operation with, allegedly, better service for consumers. The second chapter discusses how advances in information technology affect not only the internal business operations in food firms throughout the food supply chain but also how the product flows and how businesses link their processes together. The reengineering of the food supply chain by way of an industry-wide initiative called "efficient consumer response" (ECR) is explained and analyzed for its motivations and implementation, thus far. The many facets of ECR such as product replenishment and promotion are discussed. Lessons learned from ECR include that it is possible to accommodate the coexistence of firms of various sizes and types, and that the role of trade associations in facilitating industry-wide changes is vital and impressive.
THE 2001 SUPERMARKET PANEL ANNUAL REPORT
Creators: name: King, Robert P.
name: Jacobson, Elaine M.
name: Selzer, Jonathan M.
name: King, Robert P.
name: Jacobson, Elaine M.
name: Selzer, Jonathan M.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Agribusiness
subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business

description: The Supermarket Panel collects data annually from individual supermarkets on store characteristics, operations, and performance. It was established in 1998 by the Food Industry Center as the basis for ongoing study of the supermarket industry. The Panel is unique because the unit of analysis is the individual store and the same stores are tracked over time. This makes it possible to analyze the processes by which new technologies, business practices, and competitive forces are changing the industry. The 2001 Supermarket Panel consists of 563 stores selected at random from the nearly 32,000 supermarkets in the U.S. or invited to participate through their affiliation with IGA. These 563 stores are located in forty-seven states and the District of Columbia. They are a representative cross section of the industry, including stores from all formats that belong to ownership groups ranging from single stores to the country's largest chains.
Radiative Transport Equation in Rotated Reference Frames
Creators: name: Panasyuk, George
name: Schotland, John C.
name: Markel, Vadim A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A novel method for solving the linear radiative transport equation (RTE) in a three-dimensional homogeneous medium is proposed and illustrated with numerical examples. The method can be used with an arbitrary phase function A(s,s') with the constraint that it depends only on the angle between the angular variables s and s'. This corresponds to spherically symmetric (on average) random medium constituents. Boundary conditions are considered in the slab and half-space geometries. The approach developed in this paper is spectral. It allows for the expansion of the solution to the RTE in terms of analytical functions of angular and spatial variables to relatively high orders. The coefficients of this expansion must be computed numerically. However, the computational complexity of this task is much smaller than in the standard method of spherical harmonics. The solutions obtained are especially convenient for solving inverse problems associated with radiative transfer.
description: 28 pages, 7 figures
On the Energy-Momentum in Closed Universes
Creators: name: Salti, Mustafa
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper has been removed by arXiv administrators because it plagiarizes gr-qc/0011027, "Viscous cosmologies in scalar-tensor theories for Kasner type metrics," by M. Cataldo, S. del Campo and P. Salgado; gr-qc/0301022, "A generalisation of the Heckmann-Schucking cosmological solution," by I.M. Khalatnikov and A.Y. Kamenshchik; and gr-qc/0303034, "The energy of the universe in teleparallel gravity," by T. Vargas.
description: This submission has been withdrawn by arXiv administrators due to inappropriate text reuse from external sources
THE 2000 SUPERMARKET PANEL ANNUAL REPORT
Creators: name: King, Robert P.
name: Wolfson, Paul J.
name: Seltzer, Jonathan M.
name: King, Robert P.
name: Wolfson, Paul J.
name: Seltzer, Jonathan M.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Agribusiness
subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business

description: The Retail Food Industry Center established the Supermarket Panel in 1998 as the basis for ongoing study of the supermarket industry. The Panel is comprised of individual stores that provide information annually on store characteristics, operations, and performance. The Panel has two overall objectives: 1. Provide timely, useful information for the industry through benchmark reports and annual summaries. 2. Be a ready source of longitudinal, cross-section data for research on current and emerging issues. The Panel is unique because the unit of analysis is the individual store and the same stores are tracked over time. This makes it possible to trace the impacts of new technologies and business practices as they are adopted. The 2000 Panel consists of 344 stores selected at random from the nearly 32,000 supermarkets in the U.S. It is a representative cross-section of the industry. The information these stores have provided is the basis for the in-depth view of the industry presented here. Key findings are summarized in the margins of each section in this report. In general, these findings highlight significant correlations among store characteristics, business practices, and performance. They should not be interpreted as cause and effect relationships. The remainder of this report begins with a brief description of the data collection procedures for the 2000 Supermarket Panel and a descriptive profile of the participating stores, with breakdowns by size of store group, format, and location.
THE 2002 SUPERMARKET PANEL ANNUAL REPORT
Creators: name: King, Robert P.
name: Jacobson, Elaine M.
name: Seltzer, Jonathan M.
name: King, Robert P.
name: Jacobson, Elaine M.
name: Seltzer, Jonathan M.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business

description: The Supermarket Panel collects data annually from individual supermarkets on store characteristics, operations, and performance. It was established in 1998 by the Food Industry Center as the basis for ongoing study of the supermarket industry. The Panel is unique because the unit of analysis is the individual store and the same stores are tracked over time. This makes it possible to analyze the processes by which new technologies, business practices, and competitive forces are changing the industry. The 2002 Supermarket Panel consists of 866 stores selected at random from the nearly 32,000 supermarkets in the U.S. or invited to participate through their affiliation with cooperating retail companies or IGA. These 866 stores are located in forty-nine states. They are a representative cross section of the industry, including stores from all formats that belong to ownership groups ranging from single stores to the country's largest chains.
Enabling Reproducible and Agile Full-System Simulation: Artifact
Creators: name: Bruce, Bobby
name: Akram, Ayaz
name: Nguyen, Hoa
name: Roarty, Kyle
name: Mahyar Samani
name: Friborz, Marjan
name: Trivikram Reddy
name: Sinclair, Matthew D.
name: Lowe-Power, Jason
Publisher: name: figshare
Year: 2021
Subjects: subject: Computer Engineering
subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: This is the artifact for "Enabling Reproducible and Agile Full-System Simulation", by Bobby R. Bruce, Ayaz Akram, Hoa Nguyen, Kyle Roarty, Mahyar Samani, Marjan Friborz, Trivikram Reddy, Matthew D. Sinclair, and Jason Lowe-Power. Published at ISPASS 2021.
The artifact contains the data and related resources for experiments carried out in this work.
Capturing Halos at High Redshifts
Creators: name: Heitmann, Katrin
name: Lukic, Zarija
name: Habib, Salman
name: Ricker, Paul M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the evolution of the mass function of dark matter halos in the concordance LCDM model at high redshift. We employ overlapping (multiple-realization) numerical simulations to cover a wide range of halo masses, 10^7-10^{15}h^{-1}M_\odot, with redshift coverage beginning at z=20. The Press-Schechter mass function is significantly discrepant from the simulation results at high redshifts. Of the more recently proposed mass functions, our results are in best agreement with Warren et al. (2005). The statistics of the simulations -- along with good control over systematics -- allow for fits accurate to the level of 20% at all redshifts. We provide a concise discussion of various issues in defining and computing the halo mass function, and how these are addressed in our simulations.
description: 4 pages, 3 figures
On the number of representations providing noiseless subsystems
Creators: name: Ritter, William Gordon
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper studies the combinatoric structure of the set of all representations, up to equivalence, of a finite-dimensional semisimple Lie algebra. This has intrinsic interest as a previously unsolved problem in representation theory, and also has applications to the understanding of quantum decoherence. We prove that for Hilbert spaces of sufficiently high dimension, decoherence-free subspaces exist for almost all representations of the error algebra. For decoherence-free subsystems, we plot the function $f_d(n)$ which is the fraction of all $d$-dimensional quantum systems which preserve $n$ bits of information through DF subsystems, and note that this function fits an inverse beta distribution. The mathematical tools which arise include techniques from classical number theory.
description: 17 pp, 4 figs, accepted for Physical Review A
Design and construction of a laboratory-scale multifunctional bioreactor as a teaching-learning strategy in the subject Biotecnología I (Biorreactores) of the Biotechnology bachelorship program offered in the Facultad de Ciencias Exactas y Naturales of the Universidad Nacional de Asunción
Creators: name: Arias, Tomás López
name: Ríos, Danilo Fernández
name: Martinez, Lourdes
Publisher: name: F1000Research
Year: 2016

description: The search for novel teaching strategies is constant for educators dedicated to higher education. In the competency-based approach, the methods with a constructivist perspective are gaining strength. Project-based learning is characterized by the fact that the students and the educator work together on a real issue, based on common interests, which elicits the formation of teams of people with different skills who work in cooperation, seek advice from professionals in other fields, do research, learn to argue, and present concrete proposals. In this context, within the Biotechnology bachelorship program offered in the Facultad de Ciencias Exactas y Naturales of the Universidad Nacional de Asunción, the students are expected to acquire the ability to design, direct and execute methodologies applied to different aspects of industry, environment, and other areas where biotechnological solutions can be implemented. A strategy for the achievement of this type of skill is building prototypes, so that the students have the opportunity to practice by solving a specific issue, and obtaining a biotechnological product in the process. In this experience, a multifunctional bioreactor was designed, built and put into operation by students of the Bachelorship in Biotechnology, obtaining promising results.
Modified Kernel MLAA Using Autoencoder for PET-enabled Dual-Energy CT
Creators: name: Li, Siqi
name: Wang, Guobao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Combined use of PET and dual-energy CT provides complementary information for multi-parametric imaging. PETenabled dual-energy CT combines a low-energy x-ray CT image with a high-energy &γ&-ray CT (GCT) image reconstructed from time-of-flight PET emission data to enable dual-energy CT material decomposition on a PET/CT scanner. The maximumlikelihood attenuation and activity (MLAA) algorithm has been used for GCT reconstruction but suffers from noise. Kernel MLAA exploits an x-ray CT image prior through the kernel framework to guide GCT reconstruction and has demonstrated substantial improvements in noise suppression. However, similar to other kernel methods for image reconstruction, the existing kernel MLAA uses image intensity-based features to construct the kernel representation, which is not always robust and may lead to suboptimal reconstruction with artifacts. In this paper, we propose a modified kernel method by using an autoencoder convolutional neural network (CNN) to extract an intrinsic feature set from the x-ray CT image prior. A computer simulation study was conducted to compare the autoencoder CNN-derived feature representation with raw image patches for evaluation of kernel MLAA for GCT image reconstruction and dual-energy multimaterial decomposition. The results show that the autoencoder kernel MLAA method can achieve a significant image quality improvement for GCT and material decomposition as compared to the existing kernel MLAA algorithm. A weakness of the proposed method is its potential over-smoothness in a bone region, indicating the importance of further optimization in future work. The codes is available on https://github.com/SiqiLi1020/Autoencoder- Kernel-MLAA.
High Eccentricities and High Masses Characterize Gravitational-wave Captures in Galactic Nuclei as Seen by Earth-based Detectors
Creators: name: Gondán, László
name: Kocsis, Bence
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The emission of gravitational waves (GWs) during single-single close encounters in galactic nuclei (GNs) leads to the formation and rapid merger of highly eccentric stellar-mass black hole (BH) binaries. The distinct distribution of physical parameters makes it possible to statistically distinguish this source population from others. Previous studies determined the expected binary parameter distribution for this source population in single GNs. Here we take into account the effects of dynamical friction, post-Newtonian corrections, and observational bias to determine the detected sources' parameter-distributions from all GNs in the Universe. We find that the total binary mass distribution of detected mergers is strongly tilted towards higher masses. The distribution of initial peak GW frequency is remarkably high between 1-70 Hz, ~50% of GW capture sources form above 10 Hz with e >~ 0.95. The eccentricity when first entering the LIGO/Virgo/KAGRA band satisfies e_10Hz > 0.1 for over 92% of sources and e_10Hz > 0.8 for more than half of the sources. At the point when the pericenter reaches 10 GM/c^2 the eccentricity satisfies e_10M > 0.1 for over ~70% of the sources, making single-single GW capture events in GNs the most eccentric source population among the currently known stellar-mass binary BH merger channels in the Universe. We identify correlations between total mass, mass ratio, source detection distance, and eccentricities e_10Hz and e_10M. The recently measured source parameters of GW190521 lie close to the peak of the theoretical distributions and the estimated escape speed of the host environment is ~7.5x10^3 km/s - 1.2x10^4 km/s, making this source a candidate for this astrophysical merger channel.
description: 32 pages, 10 figures, 2 tables, accepted by MNRAS
Perceptions of wife-beating in post-World War II English-speaking Canada : blaming women for violence against wives
Creators: name: Purvey, Diane
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation is an analysis of perceptions of family violence in English-speaking Canada focusing on the fifteen years after the Second World. As Canadians collectively adapted to the postwar world, authorities urged them to create strong, united families as the foundation upon which the nation depended. An idealized vision of home and family domesticated and subordinated women, and served to entrench and consolidate the dominance of white, middle-class, heterosexual, and patriarchal values. The normalization of these domestic ideals shaped responses to family violence. Three sources were studied and evaluated for their presentations of family violence: popular and academic/professional English language magazines and journals, social work dissertations from the University of British Columbia, and Vancouver newspaper scripts of violence from 1947. What emerged was a remarkable consensus: although domestic violence receives little direct mention, it pervades the sources in subtle ways. Women were blamed for men's violence. Experts and commentators pathologized women who failed to fulfill their "normal" spousal and maternal responsibilities and urged them to sublimate their needs to those of their husband, their family and, indeed, the Canadian nation.
Collinear Subtractions in Hadroproduction of Heavy Quarks
Creators: name: Kniehl, B. A.
name: Kramer, G.
name: Schienbein, I.
name: Spiesberger, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a detailed discussion of the collinear subtraction terms needed to establish a massive variable-flavour-number scheme for the one-particle inclusive production of heavy quarks in hadronic collisions. The subtraction terms are computed by convoluting appropriate partonic cross sections with perturbative parton distribution and fragmentation functions relying on the method of mass factorization. We find (with one minor exception) complete agreement with the subtraction terms obtained in a previous publication by comparing the zero-mass limit of a fixed-order calculation with the genuine massles results in the MSbar scheme. This presentation will be useful for extending the massive variable-flavour-number scheme to other processes.
description: 29 pages, 17 figures included
FOG: A WATER RESOURCE FOR THE DEVELOPMENT OF ARID REGIONS; Proceedings of the Fifth Joint Conference on Agriculture, Food, and the Environment, June 17-18, 1996, Padova, Italy.
Creators: name: Semenzato, Roberto
name: Semenzato, Roberto
Publisher: name: Unknown
Year: 1996
Subjects: Resource /Energy Economics and Policy

description: The Pacific coastline from Peru to Northern Chile is one of the most arid regions in the world, with little rainfall, but considerable amounts of fog produced by the advection of marine clouds towards the continent. This paper describes a project, recently funded by the European Commission, whose objective is to set up a basic plan of sustainable use for the natural resources of the Peruvian coastal desert using collected fog as the only water resource. This plan will be based on the results of a pilot experiment, which is being carried out on the coastal hills of Southern Peru, aimed at verifying the following assumptions: the effectiveness of artificially collected fog water in the restoration of the vegetation in an environment which is undergoing a process of rapid desertification; the ability of plants to sustain themselves by means of the water supply derived from the fog they collect, and with no more need for man made collectors; the possibility that the surplus of water obtained by means of artificial collectors can be used for subsistence agriculture and for pasture growth.
Manufacturer’s decision-making model under carbon emission permits repurchase strategy and capital constraints
Creators: name: Wang, Yuyan
name: Lv, Lingxue
name: Shen, Liang
name: Tang, Rongyun
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology
subject: Computational Biology

description: Considering that the manufacturer produces normal products (NPs) and low-carbon remanufactured products (LCRPs), this paper studied the production decisions under capital constraints and the Carbon Emission Permits Repurchase Strategy (CEPRS). The direct selling model and supply chain model are constructed respectively and optimal decisions are given. On this basis, the influences of CEPRS on optimal decisions and corporate performance are analyzed. This study shows that for the capital-constrained manufacturer, adopting the CEPRS is conducive to promoting the production of LCRPs. In the direct selling model, a higher end-of-period carbon price is not always beneficial for the environment. In the supply chain model, as the end-of-period carbon price increases, the low-cap manufacturer tends to lower the wholesale price of LCRPs, while the high-cap manufacturer tends to increase the wholesale price of NPs. A lower carbon cap is more effective in controlling carbon emissions, while a higher carbon cap generates a higher profit. Moreover, the manufacturer’s preference for operation mode is affected by the carbon cap. Specifically, the low-cap manufacturer prefers the direct selling model, while the high-cap manufacturer prefers the supply chain model.
Laboratory Test Results on Natural Sand Produced by the Kapco Construction Company in Logan County
Creators: name: Hughes, Ronald D.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1962
Subjects: subject: Transportation Engineering

description: On September 19, 1962, a sample of sand produced by the Kapco Construction Company was received by the Research Division. This material was sampled at the quarry in Logan County and forwarded to the Research Division by personnel from District No. 3 of the Bowling Green Office. The sample was submitted for laboratory evaluation in regard to possible use of the material as fine aggregate in Class A concrete.
Blockchain adoption in logistics and supply chain: a literature review and research agenda
Creators: name: Karakas, Serkan
name: Acar, Avni Zafer
name: Kucukaltan, Berk
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: The supply chain is an important source of knowledge that enables potential emerging technologies and, in this ecosystem, logistics are regarded as an intermediary for disseminating innovative solutions in a coordinated manner. As an emerging solution in the supply chain area, blockchain has recently been discussed as a disruptive technology and has received growing attention from academics and practitioners. Despite this interest, insufficient knowledge on the potential benefits and risks of blockchain technology causes vagueness for its successful implementation. Therefore, since effective management of logistics and supply chain operations through advanced solutions is of utmost importance, adopting an innovative approach rather than providing anectodal evidences or narrative expressions plays a critical role in blockchain adoption. Accordingly, this research aims to an in-depth analysis of the blockchain in logistics and supply chain by investigating enablers, barriers, and risks of this adoption. To this end, through employing both the Methodi Ordinatio and the narrative network analyses, the future direction of blockchain adoption is presented in light of the presented current state of knowledge. Consequently, the obtained findings offer academic and practical insights into the ambiguous, insufficiently explained, and conflicted areas in the relationship between blockchain technologies and logistics and supply chain contexts.
2d QCD and Integrability, Part I: 't Hooft model
Creators: name: Ambrosino, Federico
name: Komatsu, Shota
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: quark, mass
string, partition function
meson, mass
string, topological
expansion 1/N, color
quantum chromodynamics
integrability
structure
integral equations
energy levels
nonperturbative
Baxter equation

description: We study analytical properties and integrable structures of the meson spectrum in large $N_c$ QCD$_2$. We show that the integral equation that determines the masses of the mesons, often called the 't Hooft equation, is equivalent to finding solutions to a TQ-Baxter equation. Using the Baxter equation, we extract systematic expansions of the energy levels as well as analytic asymptotic expressions for wavefunctions. Our analysis extends previous results for a special quark mass by Fateev et al. to arbitrary quark masses. This reformulation, together with its relation to an inhomogeneous Fredholm equation, is particularly suited for analytical treatments and makes accessible the analytic structure of the spectrum in the complex plane of the quark masses. We also comment on applications of our techniques to non-perturbative topological string partition functions.