cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantifying and Improving I/O Predictability in Virtualized Systems
Creators: name: Li, Cheng
name: Goiri, Inigo
name: Bhattacharjee, Abhishek
name: Bianchini, Ricardo
name: Nguyen, Thu
Publisher: name: Rutgers University
Year: 2013

description: Virtualization enables the consolidation of virtual machines (VMs) to increase the utilization of physical servers in Infrastructure-as-a-Service (IaaS) cloud providers. Unfortunately, our quantification of storage I/O performance across a range of workloads, virtual machine monitor (VMM) architectures, approaches to storage virtualization, and storage devices shows widespread performance unpredictability in the face of consolidation. Surprisingly, the use of solid-state drives (SSDs) can exacerbate the problem. Since many users may desire consistent performance, we argue that IaaS cloud providers should provide a class of predictable-performance service in addition to their existing (predictability-oblivious) services. Thus, we propose and evaluate VirtualFence, a storage system that provides predictable performance for this new class of service. VirtualFence uses three main techniques: (1) non-work-conserving time-division I/O scheduling, (2) a small SSD cache in front of a much larger hard disk drive (HDD), and (3) space-partitioning of both the SSD cache and the HDD. Our evaluation of a prototype VirtualFence implemented in the Xen VMM shows that VirtualFence improves predictability significantly. More fundamentally, our evaluation illustrates the tradeoff between predictability and performance. We conclude that current VMMs are far from providing predictability. Systems like VirtualFence can remedy this problem, while allowing the cloud provider to select an appropriate compromise between performance and predictability.
Ökologische Innovationspolitik - Mehr Ressourceneffizienz und Klimaschutz durch nachhaltige stoffliche Nutzungen von Biomasse
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Biomasse
Kaskadennutzung
Klima
Ökologie
Ressourceneffizienz
Stoffliche Verwertung
Umwelt

description: Nachdem die energetische Biomassenutzung im letzten Jahrzehnt massiv zunahm, steigt seit einiger Zeit auch das Interesse an der stofflichen Nutzung nachwachsender Rohstoffe. Im Vordergrund stehen hierbei Versorgungssicherheit undNachhaltigkeitder Industrie, die heute noch größtenteils von fossilen Ressourcen abhängig ist. Zukünftig sollen fossile Rohstoffe verstärkt durch biogene Rohstoffe, d. h. durch regenerative Kohlenstoffquellen, ersetzt werden. Dadurch soll in erster Linie die Versorgungssicherheit erhöht und nebenbei auch ein Beitrag zuKlimaschutzund Nachhaltigkeit geleistet werden.
Quelle: www.umweltbundesamt.de
Making Decisions: Using Electronic Data Collection to Re-Envision Reference Services at the USF Tampa Libraries
Creators: name: Todorinova, Lily
name: Huse, Andy
name: Lewis, Barbara
name: Torrence, Matt
Publisher: name: Taylor & Francis
Year: 2011
Subjects: Libraries—Special collections
Reference services (Libraries)
Staffing
Assessment
Desk Tracker (Online tool)
Administration
Electronic reference services (Libraries)
Tiered reference
Evaluation
Virtual reference
University of South Florida
Academic Libraries

description: Declining reference statistics, diminishing human resources, and the desire to be more proactive and embedded in academic departments, prompted the University of South Florida Library to create a taskforce for re-envisioning reference services. The taskforce was charged with examining the staffing patterns at the desk and developing recommendations to give librarians greater flexibility and to better respond to the information-seeking needs of users.These recommendations were based on statistics of desk usage, collected with the newly adapted online tool Desk Tracker, and structured interviews with library administrators. The taskforce was interested in how these stakeholders use quantitative data in decision-making.
Using feedback to improve VLSI designs
Creators: name: Liew, C. W.
Publisher: name: Rutgers University
Year: 1995

description: VLSI HLS design is a typical design optimization problem with a focus on generating good solutions. Typical expert design systems incorporate a large amount of domain knowledge to generate good initial solutions. These systems are unable to use information gleaned from analysis of the solutions (feedback)to generate better solutions. This paper describes a new technique called Constrained-Redo that uses feedback to improve both the power and coverage of an existing design system, the DAA system.
Parameter uncertainties in weighted unbinned maximum likelihood fits
Creators: name: Langenbruch, Christoph
Publisher: name: arXiv
Year: 2019
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Parameter estimation via unbinned maximum likelihood fits is central for many analyses performed in high energy physics. Unbinned maximum likelihood fits using event weights, for example to statistically subtract background contributions via the sPlot formalism, or to correct for acceptance effects, have recently seen increasing use in the community. However, it is well known that the naive approach to the estimation of parameter uncertainties via the second derivative of the logarithmic likelihood does not yield confidence intervals with the correct coverage in the presence of event weights. This paper derives the asymptotically correct expressions and compares them with several commonly used approaches for the determination of parameter uncertainties, some of which are shown to not generally be asymptotically correct. In addition, the effect of uncertainties on event weights is discussed, including uncertainties that can arise from the presence of nuisance parameters in the determination of sWeights.
description: 57 pages, 12 figures; v4: Fixed minor typos, matches published version
On linear chaos in function spaces
Creators: name: Jimenez, John M.
name: Markin, Marat V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: Primary 47A16, 47B37, 47B38, Secondary 47A10

description: We show that, in $L_{p}(0,\infty)$ ($1\leq p
description: Minor edits. There is a text overlap with arXiv:2106.09682 and arXiv:2106.14872 in the Preliminaries section containing introductory information, definitions, and general remarks
Do risk and fun matter in the adoption of mobile commerce in Nigeria? A PLS-SEM approach
Creators: name: Salimon, Maruf Gbadebo
name: Mokthar, Sany Sanuri Mohd
name: Yusr, Maha Mohamed
name: Yusoff, Rushami Zien Bin
name: Kareem, Olanrewaju
name: Bamgbade, Jibril
Publisher: name: Swinburne
Year: 2024

description: The objective of this research is to determine the factors that can effectively predict the adoption of mobile commerce in Nigeria. In doing this, 192 questionnaires were analyzed using Smart PLSSEM. While majority of previous studies revealed negative relationship between perceived risk and system usage, the result of this study however indicated a positive relationship with mobile commerce adoption especially with the incorporation of perceived fun that tends to make mobile commerce platforms to be enjoyable. The study provides further insights into how perceived risk and fun can be used to increase the rate of adoption of mobile commerce by coming up with policies that can be used to improve the platform while marketability of mobile commerce can be enhanced.
Dynamic QoS Provisioning in Wireless Data Networks
Creators: name: Niculescu, Dragos
name: Ganguly, Samrat
name: Vickers, Brett
Publisher: name: Rutgers University
Year: 2001

description: Providing quality of service(QoS) guarantees in mobile data networks is an inherently challenging task. Mobility of users imposes a spatial demand on resources resulting in overloaded regions that are entirely dependent on mobility pattern of users, that is often unpredictable. Prior and ongoing work in this area of QoS relies on call admission control (CAC), or careful resource allocation based on mobility prediction. The latter approach is not scalable, as it requires constant monitoring of the mobility of individual users and per-user state. Furthermore, many of the CAC schemes assume random or uniform mobility patterns, and in most cased are based on local decisions. The challenge is to design a scalable scheme that can provide QoS under distinct mobility patterns. In contrast to the standard notion of QoS which is based on the handoff dropping probability, another important notion of QoS is based on disallowing handoff drops but minimizing the cell congestion probability that may occur in a given cell. In this paper, we explore this notion of QoS by proposing a dynamic CAC scheme that uses an dynamically estimated mobility pattern and distribution of users in different cells to reach an admission decision with the objective of minimizing cell congestion probability. This scheme does not maintain per user state, and can be implemented in a distributed fashion. From simulation results, we show that across different mobility patterns, the proposed scheme performs better than existing schemes in terms of achieved QoS while providing the minimum level of overall target utilization.
Towards Social Identity in Socio-Cognitive Agents
Creators: name: Rato, Diogo
name: Mascarenhas, Samuel
name: Prada, Rui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Current architectures for social agents are designed around some specific units of social behaviour that address particular challenges. Although their performance might be adequate for controlled environments, deploying these agents in the wild is difficult. Moreover, the increasing demand for autonomous agents capable of living alongside humans calls for the design of more robust social agents that can cope with diverse social situations. We believe that to design such agents, their sociality and cognition should be conceived as one. This includes creating mechanisms for constructing social reality as an interpretation of the physical world with social meanings and selective deployment of cognitive resources adequate to the situation. We identify several design principles that should be considered while designing agent architectures for socio-cognitive systems. Taking these remarks into account, we propose a socio-cognitive agent model based on the concept of Cognitive Social Frames that allow the adaptation of an agent's cognition based on its interpretation of its surroundings, its Social Context. Our approach supports an agent's reasoning about other social actors and its relationship with them. Cognitive Social Frames can be built around social groups, and form the basis for social group dynamics mechanisms and construct of Social Identity.
Marine fungi of the Baltic Sea
Creators: name: Tibell, Sanja
name: Tibell, Leif
name: Ka-Lai Pang
name: Calabon, Mark
name: E. B. Gareth Jones
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: Science Policy

description: Vast parts of the Baltic Sea have been mycologically neglected and are still awaiting exploration. Here we summarise earlier records of marine fungi from the Baltic, supplementing them with discoveries from fieldwork in Sweden in 2019. Although marine fungal diversity is clearly attenuated in the brackish water of the Baltic Sea, a substantial number has still been discovered. Here we list 77 species from the Baltic Sea, whereas after a critical assessment a further 18 species have been excluded as records of marine fungi. The species have mainly been identified by their morphological features, supplemented by DNA-based diagnostics. Most of the species have their main distributions in temperate areas of the Atlantic Ocean. Some of the Baltic species discovered here represent far disjunctions to tropical waters while only a very few are until now only recorded for the Baltic Sea. In this paper two species belong in Basidiomycota, while the most ascomyceteous speciose classes are Sordariomycetes (with 42 species) and Dothideomycetes (24). Halosphaeriaceae is the most speciose family in marine habitats, as also in the Baltic Sea, represented here by 29 species. Three species are new to Europe, and in addition 13 to the Baltic Sea and 13 to Sweden.
Perceiving and Responding to Maternal Workplace Discrimination
Creators: name: Crowley, Jocelyn Elise
Publisher: name: Rutgers University
Year: 2016
Subjects: Motherhood
Workplace discrimination

description: Despite recent gains, mothers in the United States still face a set of challenges in achieving full equality in the labor market, including subjective discrimination, or perceived unfair treatment from their employers. Using original data from 54 qualitative interviews of predominantly middle class, heterosexual women involved in national mothers' groups, this analysis first finds that whether currently working for pay or not, mothers perceive and label a variety of past employment experiences as discriminatory. This is primarily because in their status as mothers, they are seen as not meeting the ideal worker standard of performance nor as capable as non-mothers by their employers. Mothers report events under the categories of moment of hire, on-the-job, and evaluations/promotions related bias, with on-the-job incidents most common. Second, this analysis builds on previous work that has focused on mothers' extreme reactions such as opting out of work completely and filing lawsuits by mapping out three, intermediate responses to this subjective discrimination: ambivalence, endurance, or confrontation. Endurance was the most frequently deployed response strategy overall and for each of the three categories of discrimination. None of these three strategies, unfortunately, functions to promote broad-based organizational reform that would integrate mothers more equitably into the workplace
Diversity in thermal affinity among key piscivores buffersimpacts of ocean warming on predator–prey interactions
Creators: name: Selden, Rebecca L.
name: Batt, Ryan D.
name: Saba, Vincent S.
name: Pinsky, Malin L.
Publisher: name: Rutgers University
Year: 2018
Subjects: Functional diversity
Marine
Predator–prey
Spatial overlap
Species distribution model
Climate Change

description: Asymmetries in responses to climate change have the potential to alter importantpredator–prey interactions, in part by altering the location and size of spatial refugiafor prey. We evaluated the effect of ocean warming on interactions between fourimportant piscivores and four of their prey in the U.S. Northeast Shelf by examiningspecies overlap under historical conditions (1968–2014) and with a doubling in CO2.Because both predator and prey shift their distributions in response to changingocean conditions, the net impact of warming or cooling on predator–prey interac-tions was not determined a priori from the range extent of either predator or preyalone. For Atlantic cod, an historically dominant piscivore in the region, we foundthat both historical and future warming led to a decline in the proportion of preyspecies’ range it occupied and caused a potential reduction in its ability to exerttop-down control on these prey. In contrast, the potential for overlap of spiny dog-fish with prey species was enhanced by warming, expanding their importance aspredators in this system. In sum, the decline in the ecological role for cod thatbegan with overfishing in this ecosystem will likely be exacerbated by warming, butthis loss may be counteracted by the rise in dominance of other piscivores withcontrasting thermal preferences. Functional diversity in thermal affinity within thepiscivore guild may therefore buffer against the impact of warming on marineecosystems, suggesting a novel mechanism by which diversity confers resilience.
Dualization and Automatic Distributed Parameter Selection of Total Generalized Variation via Bilevel Optimization
Creators: name: Hintermüller, Michael
name: Papafitsoros, Kostas
name: Rautenberg, Carlos N.
name: Sun, Hongpeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Total Generalized Variation (TGV) regularization in image reconstruction relies on an infimal convolution type combination of generalized first- and second-order derivatives. This helps to avoid the staircasing effect of Total Variation (TV) regularization, while still preserving sharp contrasts in images. The associated regularization effect crucially hinges on two parameters whose proper adjustment represents a challenging task. In this work, a bilevel optimization framework with a suitable statistics-based upper level objective is proposed in order to automatically select these parameters. The framework allows for spatially varying parameters, thus enabling better recovery in high-detail image areas. A rigorous dualization framework is established, and for the numerical solution, two Newton type methods for the solution of the lower level problem, i.e. the image reconstruction problem, and two bilevel TGV algorithms are introduced, respectively. Denoising tests confirm that automatically selected distributed regularization parameters lead in general to improved reconstructions when compared to results for scalar parameters.
On rearrangement inequalities for multiple sequences
Creators: name: Wu, Chai Wah
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11Bxx, 05A20

description: The classical rearrangement inequality provides bounds for the sum of products of two sequences under permutations of terms and show that similarly ordered sequences provide the largest value whereas opposite ordered sequences provide the smallest value. This has been generalized to multiple sequences to show that similarly ordered sequences provide the largest value. However, the permutations of the sequences that result in the smallest value are generally not known. We show a variant of the rearrangement inequality for which a lower bound can be obtained and conditions for which this bound is achieved for a sequence of permutations. We also study a generalization of the rearrangement inequality and a variation where the permutations of terms can be across the various sequences. For this variation, we can also find the minimizing and maximizing sequences under certain conditions. Finally, we also look at rearrangement inequalities of other objects that can be ordered such as functions and matrices.
description: 21 pages. Minor corrections and added Lemma 12 and Theorem 23
Jevons’ paradox revisited : Implications for climate change
Creators: name: Siami, Navid
name: Winter, Ralph A.
Publisher: name: Elsevier
Year: 2025

description: Improved fuel efficiency may raise the flow of carbon emissions, from Jevons' paradox. We point out that it always raises the stock of total carbon emitted. If carbon capture and sequestration are improving over time, however, this paradox may be re-versed.
Pseudonymization of person-related research data - different techniques
Creators: name: Van Wettere, Niek
Publisher: name: Zenodo
Year: 2020
Subjects: pseudonymization
RDM
GDPR
mapping table
encryption
hashing

description: This presentation gives an overview of different techniques that can be used to pseudonymize person-related research data. Other issues with regard to pseudonymization are also addressed.
The formation of a cold-core eddy in the East Australian Current
Creators: name: Macdonald, H. S.
name: Roughan, M.
name: Baird, M. E.
name: Wilkin, John L.
Publisher: name: Rutgers University
Year: 2018
Subjects: Eddies
Cyclonic eddy
Energy transformation
Regional Ocean Modelling System
Ocean--Mathematical models

description: Cold-core eddies (CCEs) frequently form in western boundary currents and can affect continental shelf processes. It is not always clear, however, if baroclinic or barotropic instabilities contribute more to their formation. The Regional Ocean Modelling System (ROMS) is used to investigate the ocean state during the formation of a CCE in the East Australian Current (EAC) during October 2009. The observed eddy initially appeared as a small billow (approx. 50 km in length) that perturbed the landward edge of the EAC. The billow grew into a mesoscale CCE (approx. 100 km in diameter), diverting the EAC around it. A ROMS simulation with a realistic wind feld reproduced a similar eddy. This eddy formed from negative vorticity waters found on the continental shelf south of the EAC separation point. A sensitivity analysis is performed whereby the impact of 3 different wind forcing scenarios; upwelling, downwelling, and no winds are investigated. A CCE formed in all wind scenarios despite the wind induced changes in hydrographic conditions in the continental shelf and slope waters. As such, the source of energy for eddy formation did not come from the interactions of wind with the continental shelf waters. Analysis of strain and energy transformation confirms this by showing that the prevailing source of CCE energy was kinetic energy of the offshore EAC. These results clearly link the formation of the CCE to the swift flowing EAC and barotropic instabilities.
Collaborative location-based mobile game with error detection algorithm
Creators: name: Tazuddin, Adrus Mohamad
name: Ming, Wong Ming
name: Aizuddin, Abang Mohamad
Publisher: name: Swinburne
Year: 2024

description: In the recent years, there has been an evolution in game input medium. From just using buttons, players can now interact with games through a wider spectrum of inputs which includes touch screen, camera, light sensor, accelerometer, compass and GPS. This is driven by the availability of these modules and sensors within mobile devices that are omnipresent nowadays. As a result, there has been a creative breakthrough on how games are played today where gaming experience can be made more intuitive and immersive. Localization is one of the input medium where the player’s physical location is used as part of the gameplay. This paper proposes an original gameplay schema that utilizes indoor mobile Wi-Fi localization technique as game input that does not require additional infrastructure. The game takes advantage of the weakness of Wi-Fi localization where environmental influence is significant and makes it part of the gameplay. A simple error detection algorithm is also introduced to maximize the game playability value by balancing game responsiveness and accuracy level.
Decentralized Ride-Sharing and Vehicle-Pooling Based on Fair Cost-Sharing Mechanisms
Creators: name: Chau, Sid Chi-Kin
name: Shen, Shuning
name: Zhou, Yue
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Ride-sharing or vehicle-pooling allows commuters to team up spontaneously for transportation cost sharing. This has become a popular trend in the emerging paradigm of sharing economy. One crucial component to support effective ride-sharing is the matching mechanism that pairs up suitable commuters. Traditionally, matching has been performed in a centralized manner, whereby an operator arranges ride-sharing according to a global objective (e.g., total cost of all commuters). However, ride-sharing is a decentralized decision-making paradigm, where commuters are self-interested and only motivated to team up based on individual payments. Particularly, it is not clear how transportation cost should be shared fairly between commuters, and what ramifications of cost-sharing are on decentralized ride-sharing. This paper sheds light on the principles of decentralized ride-sharing and vehicle-pooling mechanisms based on stable matching, such that no one would be better off to deviate from a stable matching outcome. We study various fair cost-sharing mechanisms and the induced stable matching outcomes. We compare the stable matching outcomes with a social optimal outcome (that minimizes total cost) by theoretical bounds of social optimality ratios, and show that several fair cost-sharing mechanisms can achieve high social optimality. We also corroborate our results with an empirical study of taxi sharing under fair cost-sharing mechanisms by a data analysis on New York City taxi trip dataset, and provide useful insights on effective decentralized mechanisms for practical ride-sharing and vehicle-pooling.
description: To appear in IEEE Trans. on Intelligent Transportation Systems
Where is critical analysis of power and positionality in knowledge translation?
Creators: name: Crosschild, Chloe
name: Huynh, Ngoc
name: De Sousa, Ismália
name: Bawafaa, Eunice
name: Brown, Helen
Publisher: name: BioMed Central
Year: 2021

description: In Canada, the Eurocentric epistemological foundations of knowledge translation (KT) approaches and practices have been significantly influenced by the Canadian Institutes of Health Research (CIHR) KT definition. More recently, integrated knowledge translation (IKT) has emerged in part as epistemic resistance to Eurocentric discourse to critically analyse power relations between researcher and participants. Yet, despite the proliferation of IKT literature, issues of power in research relationships and strategies to equalize relationships remain largely unaddressed. In this paper, we analyse the gaps in current IKT theorizing against the backdrop of the CIHR KT definition by drawing on critical scholars, specifically those writing about standpoint theory and critical reflexivity, to advance IKT practice that worked to surface and change research-based power dynamics within the context of health research systems and policy.
A study on the reliability of consecutive k-Out-of-n: G systems based on Copula
Creators: name: Jia, Xujie
name: Cui, Lirong
name: Yan, Jinqiu
Publisher: name: Rutgers University
Year: 2099
Subjects: Copula
Consecutive k-out-of-n: Dependent failure
G system
Reliability

description: The computation of reliability characteristics of a system that consists of dependent components is sometimes difficult especially when the type of dependence is not known. This article introduces the copula method to calculate the reliability of dependent consecutive k-out-of-n: G systems. The components in these systems are dependent on each other and the dependency may be either linear or nonlinear. The copula is a popular tool for modeling the dependence structure of data. It contains the information about the dependency structure of a vector of random variables and can capture nonlinear dependence. Based on the copula theory, the article analyzes the consecutive k-out-of-n: G systems and gets the reliability indexes. Finally, some numerical examples are presented to illustrate the results obtained in this article.
On the Genus of the Star Graph
Creators: name: Abbasi, Sarmad
Publisher: name: Rutgers University
Year: 1993

description: The star graph Sn is a graph with Sn the set of all permutations over {1,...,n} as its vertex set; two vertices π1 and π2 are connected if π1 can be obtained form π2 by swapping the first element of π1 with one of the other n-1 elements. In this paper we establish the genus of the star graph. We show that the genus, gn of Sn , is exactly equal to n!(n-4)/6+ 1 by establishing a lower bound and inductively giving a drawing on a surface of appropriate genus
Messung der Nachhaltigkeit des Tourismus in Deutschland
Creators: name: Dickhut, Heike
name: Strasdas, Wolfgang
name: Goerge, Marius
Publisher: name: Umweltbundesamt
Year: 2023
Subjects: Sanfter Tourismus

description: Der Abschlussbericht stellt die im Forschungsvorhaben entwickelte Messung der Nachhaltigkeit des dem sogenannte Tourismus Sustainability Satellite Account (TSSA), ein Bilanzierungssystem zur Messung der Nachhaltigkeit des Deutschlandtourismus und den Zusatzindikatoren. Ersteres umfasst die Aspekte Wertschöpfung und Arbeitsplätzen, Arbeitsproduktivität, Energieverbrauch, Energieintensität. Emissionen von Treibhausgasen (THG), Wasserverbrauch und Gender Pay Gap. Im zweiten Teil finden sich Indikatoren zu Biodiversität, Wasserqualität, Lärmbelastung, Flächeninanspruchnahme, Luftemissionen und Abfallaufkommen sowie für den sozialen Indikator Tourismusakzeptanz. Quelle: www.umweltbundesamt.de
Gorenstein rings generated by strongly stable sets of quadratic monomials
Creators: name: Fröberg, Ralf
name: Nicklasson, Lisa
Publisher: name: arXiv
Year: 2020
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13F55, 13C40, 13D40, 13H10

description: We characterize all Gorenstein rings generated by strongly stable sets of monomials of degree two. We compute their Hilbert series in several cases, which also provides an answer to a question by Migliore and Nagel.
description: To appear in Communication in Algebra
Searching for the Kardar-Parisi-Zhang phase in microcavity polaritons
Creators: name: Ferrier, A.
name: Zamora, A.
name: Dagvadorj, G.
name: Szymańska, M. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Recent approximate analytical work has suggested that, at certain values of the external pump, the optical parametric oscillator (OPO) regime of microcavity polaritons may provide a long sought realisation of Kardar-Parisi-Zhang (KPZ) physics in 2D. Here, by solving the full microscopic model numerically using the truncated Wigner method, we prove that this predicted KPZ phase for OPO is robust against the appearance of vortices or other effects. For those pump strengths, spatial correlations in the direction perpendicular to the pump, and the distribution of phase fluctuations, match closely to the forms characteristic of the KPZ universality. This strongly indicates the viability of observing KPZ behaviour in future polariton OPO experiments.
description: (12 pages, 16 figures)
Vision, Innovation, and Leadership in Research Libraries
Creators: name: Jantz, Ronald C.
Publisher: name: Rutgers University
Year: 2018
Subjects: Research libraries
Innovation
Management
Leadership
Vision

description: This study examined the relationship of research library visions, as embodied in a publicly posted vision statement, and the innovativeness of the library. The literature on organizational vision is abundant and generally reveals a positive relationship between vision, visionary leadership, and a variety of organizational factors. Many researchers state that a vision, communicated throughout the organization, is a critical element of organizational success and those entities without a vision are “stumbling in the dark”. In this study, library professionals rated each research library vision statement based on established attributes and it was found that the resulting vision statement score was positively and significantly related to the innovativeness of the library.
A transcendental Brauer-Manin obstruction to weak approximation on a Calabi-Yau threefold
Creators: name: Hashimoto, Sachi
name: Honigs, Katrina
name: Lamarche, Alicia
name: Vogt, Isabel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper we investigate the $\mathbb{Q}$-rational points of a class of simply connected Calabi-Yau threefolds, which were originally studied by Hosono and Takagi in the context of mirror symmetry. These varieties are defined as a linear section of a double quintic symmetroid; their points correspond to rulings on quadric hypersurfaces. They come equipped with a natural $2$-torsion Brauer class. Our main result shows that under certain conditions, this Brauer class gives rise to a transcendental Brauer-Manin obstruction to weak approximation. Hosono and Takagi showed that over $\mathbb{C}$ each of these Calabi-Yau threefolds $Y$ is derived equivalent to a Reye congruence Calabi-Yau threefold $X$. We show that these derived equivalences may also be constructed over $\mathbb{Q}$, and we give sufficient conditions for $X$ to not satisfy weak approximation. In the appendix, N. Addington exhibits the Brauer groups of each class of Calabi--Yau variety over $\mathbb{C}$.
description: minor edits
A Standard Siren Cosmological Measurement from the Potential GW190521 Electromagnetic Counterpart ZTF19abanrhr
Creators: name: Chen, Hsin-Yu
name: Haster, Carl-Johan
name: Vitale, Salvatore
name: Farr, Will M.
name: Isi, Maximiliano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The identification of the electromagnetic counterpart candidate ZTF19abanrhr to the binary black hole merger GW190521 opens the possibility to infer cosmological parameters from this standard siren with a uniquely identified host galaxy. The distant merger allows for cosmological inference beyond the Hubble constant. Here we show that the three-dimensional spatial location of ZTF19abanrhr calculated from the electromagnetic data remains consistent with the updated sky localization of GW190521 provided by the LIGO-Virgo Collaboration. If ZTF19abanrhr is associated with the GW190521 merger and assuming a flat wCDM model we find that $H_0 =48^{+24}_{-10}$ km/s/Mpc, $Ω_m =0.39^{+0.38}_{-0.29}$, and $w_0 = -1.29^{+0.63}_{-0.50}$ (median and 68% credible interval). If we use the Hubble constant value inferred from another gravitational-wave event, GW170817, as a prior for our analysis, together with assumption of a flat $Λ$CDM and the model-independent constraint on the physical matter density $ω_m$ from Planck, we find $H_0 = 69.1^{8.7}_{-6.0}$ km/s/Mpc.
description: The data behind figures are publicly available at https://doi.org/10.5281/zenodo.4057311 Published version on MNRAS
Cladistical analysis of the Jovian and Saturnian Satellite Systems
Creators: name: Holt, Timothy. R.
name: Brown, Adrian. J.
name: Nesvorný, David
name: Horner, Jonathan
name: Carter, Brad
Publisher: name: Swinburne
Year: 2024

description: Jupiter and Saturn each have complex systems of satellites and rings. These satellites can be classified into dynamical groups, implying similar formation scenarios. Recently, a larger number of additional irregular satellites have been discovered around both gas giants that have yet to be classified. The aim of this paper is to examine the relationships between the satellites and rings of the gas giants, using an analytical technique called cladistics. Cladistics is traditionally used to examine relationships between living organisms, the "tree of life." In this work, we perform the first cladistical study of objects in a planetary science context. Our method uses the orbital, physical, and compositional characteristics of satellites to classify the objects in the Jovian and Saturnian systems. We find that the major relationships between the satellites in the two systems, such as families, as presented in previous studies, are broadly preserved. In addition, based on our analysis of the Jovian system, we identify a new retrograde irregular family, the Iocaste family, and suggest that the Phoebe family of the Saturnian system can be further divided into two subfamilies. We also propose that the Saturnian irregular families be renamed, to be consistent with the convention used in Jovian families. Using cladistics, we are also able to assign the new unclassified irregular satellites into families. Taken together, the results of this study demonstrate the potential use of the cladistical technique in the investigation of relationships between orbital bodies.
Complete Controllability Despite Degeneracy: Quantum Control of Enantiomer-Specific State Transfer in Chiral Molecules
Creators: name: Leibscher, Monika
name: Pozzoli, Eugenio
name: Pérez, Cristobal
name: Schnell, Melanie
name: Sigalotti, Mario
name: Boscain, Ugo
name: Koch, Christiane P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We prove complete controllability for rotational states of an asymmetric top molecule belonging to degenerate values of the orientational quantum number M. Based on this insight, we construct a pulse sequence that energetically separates population initially distributed over degenerate M-states, as a precursor for orientational purification. Introducing the concept of enantio-selective controllability, we determine the conditions for complete enantiomer-specific population transfer in chiral molecules and construct pulse sequences realizing this transfer for population initially distributed over degenerate M-states. This degeneracy presently limits enantiomer-selectivity for any initial state except the rotational ground state. Our work thus shows how to overcome an important obstacle towards separating, with electric fields only, left-handed from right-handed molecules in a racemic mixture.
description: 21 pages, 7 figures
On the frequency of the most frequently occurring variable in dual monotone DNFs
Creators: name: Khachiyan, Leonid
name: Gurvich, Vladimir
Publisher: name: Rutgers University
Year: 1995
Subjects: Monotone Boolean function
Disjunctive normal form
Prime implicant
Duality
Short implicant
Frequent variable
Transversal hypergraph
Clutter
Blocker
Quasi-polynomial time

description: Let f(x1,....., xn) = VIεF^iεIxi and g(x1,.....,xn) = VIεF^iεIxi be a pair of dual monotone irredundant disjunctive normal forms, where F and G are the sets of the prime implicants of f and g, respectively. For a variable xi, i = 1,......, n, let i= #{I ε F|i ε I}/|F| and i = #{I ε G|i ε I}/|G| be the frequencies with which xi occurs in f and g. It is easily seen that maxf{u1, v1,......un,vn}>= 1/ log(|F|+|G|): We give examples of arbitrarily large F and G for which the above bound is tight up to a factor of 2.
Rank Determination in Tensor Factor Model
Creators: name: Han, Yuefeng
name: Chen, Rong
name: Zhang, Cun-Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Econometrics (econ.EM)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business
subject: Primary 62H25, 62H12, secondary 62F07

description: Factor model is an appealing and effective analytic tool for high-dimensional time series, with a wide range of applications in economics, finance and statistics. This paper develops two criteria for the determination of the number of factors for tensor factor models where the signal part of an observed tensor time series assumes a Tucker decomposition with the core tensor as the factor tensor. The task is to determine the dimensions of the core tensor. One of the proposed criteria is similar to information based criteria of model selection, and the other is an extension of the approaches based on the ratios of consecutive eigenvalues often used in factor analysis for panel time series. Theoretically results, including sufficient conditions and convergence rates, are established. The results include the vector factor models as special cases, with an additional convergence rates. Simulation studies provide promising finite sample performance for the two criteria.
Transmon platform for quantum computing challenged by chaotic fluctuations
Creators: name: Berke, Christoph
name: Varvelis, Evangelos
name: Trebst, Simon
name: Altland, Alexander
name: DiVincenzo, David P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: From the perspective of many body physics, the transmon qubit architectures currently developed for quantum computing are systems of coupled nonlinear quantum resonators. A significant amount of intentional frequency detuning (disorder) is required to protect individual qubit states against the destabilizing effects of nonlinear resonator coupling. Here we investigate the stability of this variant of a many-body localized (MBL) phase for system parameters relevant to current quantum processors of two different types, those using untunable qubits (IBM type) and those using tunable qubits (Delft/Google type). Applying three independent diagnostics of localization theory -- a Kullback-Leibler analysis of spectral statistics, statistics of many-body wave functions (inverse participation ratios), and a Walsh transform of the many-body spectrum -- we find that these computing platforms are dangerously close to a phase of uncontrollable chaotic fluctuations.
description: 10 pages, 9 figures, Supplemental Material (4 pages, 4 figures). Added discussion of experimental frequency disorder and pattern engineering
A Time-Inconsistent Dynkin Game: from Intra-personal to Inter-personal Equilibria
Creators: name: Huang, Yu-Jui
name: Zhou, Zhou
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Mathematical Finance (q-fin.MF)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 60J20, 91A05, 91A07, 03E75

description: This paper studies a nonzero-sum Dynkin game in discrete time under non-exponential discounting. For both players, there are two levels of game-theoretic reasoning intertwined. First, each player looks for an intra-personal equilibrium among her current and future selves, so as to resolve time inconsistency triggered by non-exponential discounting. Next, given the other player's chosen stopping policy, each player selects a best response among her intra-personal equilibria. A resulting inter-personal equilibrium is then a Nash equilibrium between the two players, each of whom employs her best intra-personal equilibrium with respect to the other player's stopping policy. Under appropriate conditions, we show that an inter-personal equilibrium exists, based on concrete iterative procedures along with Zorn's lemma. To illustrate our theoretic results, we investigate a two-player real options valuation problem: two firms negotiate a deal of cooperation to initiate a project jointly. By deriving inter-personal equilibria explicitly, we find that coercive power in negotiation depends crucially on the impatience levels of the two firms.
Digestive Enzymes of Human and Nonhuman Primates
Creators: name: Janiak, Mareike Cora
Publisher: name: Rutgers University
Year: 2017
Subjects: Dietary adaptations
Amylase
Lactase
Chitinase
Pepsin

description: All living organisms need to consume nutrients to grow, survive, and reproduce, making the successful acquisition of food resources a powerful selective pressure. However, acquiring food is only part of the challenge. While all animals spend much of their daily activity budget hunting, searching for, or otherwise procuring food, a large part of what is involved in overall nutrition occurs once the meal has been swallowed. Most nutritional components are too complex for immediate use and must be broken down into simpler compounds, which can then be absorbed by the body. This process, digestion, is catalyzed by enzymes that are either endogenous or produced by the host's microbial population. Research shows that the nutritional value of food is partially constrained by the digestive abilities of the microbial community present in the host's gut and that these microbes rapidly adapt to changes in diet and other environmental pressures. An accumulating body of evidence suggests that endogenously produced digestive enzymes also have been, and still are, common targets of natural selection, further cementing their crucial role in an organism's digestive system.
alfonso: Matlab package for nonsymmetric conic optimization
Creators: name: Papp, Dávid
name: Yıldız, Sercan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C25, 90-04, 65K05, 90C51, 90C22

description: We present alfonso, an open-source Matlab package for solving conic optimization problems over nonsymmetric convex cones. The implementation is based on the authors' corrected analysis of a primal-dual interior-point method of Skajaa and Ye. This method enables optimization over any convex cone as long as a logarithmically homogeneous self-concordant barrier is available for the cone or its dual. This includes many nonsymmetric cones, for example, hyperbolicity cones and their duals (such as sum-of-squares cones), semidefinite and second-order cone representable cones, power cones, and the exponential cone. Besides enabling the solution of problems which cannot be cast as optimization problems over a symmetric cone, it also offers performance advantages for problems whose symmetric cone programming representation requires a large number of auxiliary variables or has a special structure that can be exploited in the barrier computation. The worst-case iteration complexity of alfonso is the best known for non-symmetric cone optimization: $O(\sqrtν\log(1/ε))$ iterations to reach an $ε$-optimal solution, where $ν$ is the barrier parameter of the barrier function used in the optimization. alfonso can be interfaced with a Matlab function (supplied by the user) that computes the Hessian of a barrier function for the cone. For convenience, a simplified interface is also available to optimize over the direct product of cones for which a barrier function has already been built into the software. This interface can be easily extended to include new cones. Both interfaces are illustrated by solving linear programs. The oracle interface and the efficiency of alfonso are also demonstrated using a design of experiments problem in which the tailored barrier computation greatly decreases the solution time compared to using state-of-the-art conic optimization software.
description: This is an early but essentially complete preprint submitted to the INFORMS Journal on Computing on August 19, 2020. The revised and final version of this paper will appear there. The accompanying software can be downloaded from https://github.com/dpapp-github/alfonso