cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Culling the herd of moments with penalized empirical likelihood
Creators: name: Chang, Jinyuan
name: Shi, Zhentao
name: Zhang, Jia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Econometrics (econ.EM)
subject: Statistics Theory (math.ST)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: Models defined by moment conditions are at the center of structural econometric estimation, but economic theory is mostly agnostic about moment selection. While a large pool of valid moments can potentially improve estimation efficiency, in the meantime a few invalid ones may undermine consistency. This paper investigates the empirical likelihood estimation of these moment-defined models in high-dimensional settings. We propose a penalized empirical likelihood (PEL) estimation and establish its oracle property with consistent detection of invalid moments. The PEL estimator is asymptotically normally distributed, and a projected PEL procedure further eliminates its asymptotic bias and provides more accurate normal approximation to the finite sample behavior. Simulation exercises demonstrate excellent numerical performance of these methods in estimation and inference.
title: Optimization of Business Processes in a Transport Company in The Republic of North Macedonia
Creators: name: Mitreva, Elizabeta
name: Tashkova, Stefanija
name: Gjorshevski, Hristijan
Publisher: name: TEM Journal
Year: 2019

description: The aim of this paper is to show how a service company, whose main activity is transport and storage, finds the bottlenecks in the work, and after that creates changes whose realization takes place through the optimization process. The subjects of the research in this paper are software solution for transport and storage that is not yet presented enough in the competing companies on the North Macedonian market. For this purpose, the work of one of the companies is represented, which is a user of the services regarding the transport company and benefits emanated by implementing such a software. Optimization of transport (transport routes) and storage are areas with strong potential for improvement. The operators in this sector are facing the so-called problem of “empty miles’’. By means of the help regarding transport management software, optimization of costs is achieved by finding the most affordable and economical routes.

Keywords –quality system, model, business process optimization, costs of quality, TQM (Total Quality Management) strategy.
(Chiral) Virasoro invariance of the tree-level MHV graviton scattering amplitudes
Creators: name: Banerjee, Shamik
name: Ghosh, Sudip
name: Paul, Partha
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we continue our study of the tree level MHV graviton scattering amplitudes from the point of view of celestial holography. In arXiv:2008.04330 we showed that the celestial OPE of two gravitons in the MHV sector can be written as a linear combination of $\overline{SL(2,\mathbb C)}$ current algebra and supertranslation descendants. In this note we show that the OPE is in fact manifestly invariant under the infinite dimensional Virasoro algebra as is expected for a $2$-D CFT. This is consistent with the conjecture that the holographic dual in $4$-D asymptotically flat space time is a $2$-D CFT. Since we get only one copy of the Virasoro algebra we can conclude that the holographic dual theory which computes the MHV amplitudes is a chiral CFT with a host of other infinite dimensional global symmetries including $\overline{SL(2,\mathbb C)}$ current algebra, supertranslations and subsubleading soft graviton symmetry. We also discuss some puzzles related to the appearance of the Virasoro symmetry.
description: 7+13 pages, Latex, some problems with referencing resolved
Forerunners of Sleep, Exercise, and Athletic Performance.
Creators: name: Leota, Joshua Joseph
Publisher: name: Monash University
Year: 2025
Subjects: classificationCode: 319999
subject: Other biological sciences not elsewhere classified

description: This thesis explores associations between sleep, exercise, and performance. Two studies examining ~20,000 adults across ~6.5-million nights revealed strenuous evening exercise may disrupt sleep and autonomic function, whereas changes to regular sleep patterns may influence next-day exercise behaviour. Two studies examining 10-years of NBA data revealed eastward jet lag may impair performance, whereas the presence of crowds may be the predominant driver of NBA home court advantage. Athletes and non-athletes alike should consider the important role sleep plays in the pursuit of optimal health and peak performance.
title: Managing Logistic System of an Enterprise in the Context of Conducting International  Business Transactions
Creators: name: Nina, Pitel
name: Liudmyla, Alioshkina
name: Natalia, Verniuk
name: Inna, Novak
name: Lydmila, Smoliy
Publisher: name: TEM Journal
Year: 2019

description: This paper substantiates that in terms of the international business, management regarding the logistics system within the enterprise requires an integrated approach and coordination of potential capabilities of the business entity, a clear balance and interconnection of logistics flows in the field of production, procurement, warehousing, transportation and marketing. The scientific novelty of the conducted research includes substantiate feasibility of creating a strategy for managing logistics processes within an enterprise-entity of foreign economic activity, which is based on its foreign trade orientation. Such logistic system will contribute to the formation of the economic potential of within the enterprise and, increase the capital profitability. Furthermore, it will be the source of its competitive advantages and a means of increasing market value and profitability.

Keywords –logistics system, Index of Logistics Efficiency, logistics management, logistics flows, international business operations.
title: Design Supply Cycle for Inventory Management
Creators: name: Malindzakova, Marcela
name: Zimon, Dominik
Publisher: name: TEM Journal
Year: 2019

description: In each company within the application of the lean principle for the material flow area, the inventory management is essential. The subject of this paper is to describe the application of differentiated inventory management. Some businesses have a large number of warehouse items, and it is therefore necessary to identify and work with inventory information. In terms of logistics, it is important to take into account the general rule, which is to keep the amount of inventories at minimum, as well as, the principle of minimising any unnecessary waste. The main purpose of the inventory management is to determine which items are important for the company. The aim of the paper is to demonstrate that the implementation of inventory management could contribute to an increase of certain sales aspects of the company. This article applies a case study scenario in order to analyse a logistics company's sales records, from the sale of car components. The final parts the article provides a comparison of the improved situation within company, in terms of monitored sales parameters. The comparison includes parameters such as the number of deliveries, speed of delivery, and the number of distributed quantities before and after the implementation of differentiated inventory management model.

Keywords –Inventory management, stock items, supply process, goods and materials.
Feynman Integrals in Dimensional Regularization and Extensions of Calabi-Yau Motives
Creators: name: Bönisch, Kilian
name: Duhr, Claude
name: Fischbach, Fabian
name: Klemm, Albrecht
name: Nega, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We provide a comprehensive summary of concepts from Calabi-Yau motives relevant to the computation of multi-loop Feynman integrals. From this we derive several consequences for multi-loop integrals in general, and we illustrate them on the example of multi-loop banana integrals. For example, we show how Griffiths transversality, known from the theory of variation of mixed Hodge structures, leads quite generically to a set of quadratic relations among maximal cut integrals associated to Calabi-Yau motives. These quadratic relations then naturally lead to a compact expression for $l$-loop banana integrals in $D=2$ dimensions in terms of an integral over a period of a Calabi-Yau $(l-1)$-fold. This new integral representation generalizes in a natural way the known representations for $l\le 3$ involving logarithms with square root arguments and iterated integrals of Eisenstein series. In a second part, we show how the results obtained by some of the authors in earlier work can be extended to dimensional regularization. We present a method to obtain the differential equations for banana integrals with an arbitrary number of loops in dimensional regularization without the need to solve integration-by-parts relations. We also present a compact formula for the leading asymptotics of banana integrals with an arbitrary number of loops in the large momentum limit. This generalizes the novel $\widehatΓ$-class introduced by some of the authors to dimensional regularization and provides a convenient boundary condition to solve the differential equations for the banana integrals. As an application, we present for the first time numerical results for equal-mass banana integrals with up to four loops and up to second order in the dimensional regulator.
description: 112 pages, 3 figures
Learning from Images: Proactive Caching with Parallel Convolutional Neural Networks
Creators: name: Wang, Yantong
name: Hu, Ye
name: Yang, Zhaohui
name: Saad, Walid
name: Wong, Kai-Kit
name: Friderikos, Vasilis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: With the continuous trend of data explosion, delivering packets from data servers to end users causes increased stress on both the fronthaul and backhaul traffic of mobile networks. To mitigate this problem, caching popular content closer to the end-users has emerged as an effective method for reducing network congestion and improving user experience. To find the optimal locations for content caching, many conventional approaches construct various mixed integer linear programming (MILP) models. However, such methods may fail to support online decision making due to the inherent curse of dimensionality. In this paper, a novel framework for proactive caching is proposed. This framework merges model-based optimization with data-driven techniques by transforming an optimization problem into a grayscale image. For parallel training and simple design purposes, the proposed MILP model is first decomposed into a number of sub-problems and, then, convolutional neural networks (CNNs) are trained to predict content caching locations of these sub-problems. Furthermore, since the MILP model decomposition neglects the internal effects among sub-problems, the CNNs' outputs have the risk to be infeasible solutions. Therefore, two algorithms are provided: the first uses predictions from CNNs as an extra constraint to reduce the number of decision variables; the second employs CNNs' outputs to accelerate local search. Numerical results show that the proposed scheme can reduce 71.6% computation time with only 0.8% additional performance cost compared to the MILP solution, which provides high quality decision making in real-time.
description: 30 pages, 6 tables, 8 figures; typos corrected
title: Modeling the Influence of Cluster Components on the Economic Development of a Territory
Creators: name: Telizhenko, Oleksandr
name: Pavlenko, Olena
name: Martynets, Viktoriya
name: Rybalchenko, Svitlana
Publisher: name: TEM Journal
Year: 2019

description: The article examines the clusters with research centers/institutions as a core. The cluster model has been developed on the basis of the modified theory of “growth poles”, taking into account the main provisions of the theory of “structures with direct and indirect relations”. Based on a survey among representatives of science, business and government, calculated are the values of indicators of economic expectations of return on invested capital in basic and applied research. An economic and mathematical model has been developed and the dependence between GDP volumes and the level of research funding have been established. It is proved that in the conditions of the Ukrainian economy, research centers/institutions should be the center of the cluster and the start component of regional economic development.

Keywords –Cluster, science, business, government, development.
Sparse Plus Low Rank Matrix Decomposition: A Discrete Optimization Approach
Creators: name: Bertsimas, Dimitris
name: Cory-Wright, Ryan
name: Johnson, Nicholas A. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study the Sparse Plus Low-Rank decomposition problem (SLR), which is the problem of decomposing a corrupted data matrix into a sparse matrix of perturbations plus a low-rank matrix containing the ground truth. SLR is a fundamental problem in Operations Research and Machine Learning which arises in various applications, including data compression, latent semantic indexing, collaborative filtering, and medical imaging. We introduce a novel formulation for SLR that directly models its underlying discreteness. For this formulation, we develop an alternating minimization heuristic that computes high-quality solutions and a novel semidefinite relaxation that provides meaningful bounds for the solutions returned by our heuristic. We also develop a custom branch-and-bound algorithm that leverages our heuristic and convex relaxations to solve small instances of SLR to certifiable (near) optimality. Given an input $n$-by-$n$ matrix, our heuristic scales to solve instances where $n=10000$ in minutes, our relaxation scales to instances where $n=200$ in hours, and our branch-and-bound algorithm scales to instances where $n=25$ in minutes. Our numerical results demonstrate that our approach outperforms existing state-of-the-art approaches in terms of rank, sparsity, and mean-square error while maintaining a comparable runtime.
title: Empirical Analysis of the Effectiveness of the Free Trade Area between the EU and Ukraine for the Agricultural Market
Creators: name: Lagodiienko, Volodymyr
Publisher: name: TEM Journal
Year: 2019

description: The article presents the evaluation of the effectiveness of a deep and comprehensive free trade area between Ukraine and the European Union for the agro-food products. The dynamics of comparative advantages of agro-food products of Ukraine in the context of separate groups with the use of the modified Balassa index is analyzed. It has been established that the improvement of competitive positions after the introduction of the free trade area is observed in the most types of products among those with identified comparative advantages on the European market. The positive influence of the progress within trade and economic cooperation between Ukraine and the EU on the competitive position of agro-food products at the European market is substantiated.

Keywords –Agricultural products, free trade zone, comparative advantages, Balassa index.
title: Richard Pittioni, Bibliographie zur Urgeschichte Österreichs (einschließlich Deutschsüdtirol)
Creators: name: Zeiß, Hans
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Richard Pittioni, Bibliographie zur Urgeschichte Österreichs (einschließlich Deutschsüdtirol). (Bibliographie zur Geschichte, Landes- und Volkskunde Österreichs, Erg.-Bd. 1 = Archiv für Bibliographie, Beiheft 9.) Linz a. d. Donau 1931, Verlag Franz Winkler. 245 Seiten.
title: Public Expenditure for the Environmental Protection in Slovakia
Creators: name: Bobáková, Viktória
name: Mihaliková, Eva
Publisher: name: TEM Journal
Year: 2019

description: A right for a healthy environment is an essential human right. The Government of the Slovak Republic realizes it and it has created a sufficient legal framework for its protection. An integration into the European Union has supported the growth in the investments into environmental infrastructure, updating of environmental policies as well as a modernization of the institutions even though the pace of changes in the above spheres lags behind an economic development. This study evaluates the amount of public expenditure to be spent for environmental protection in the Slovak Republic, it identifies the main environmental spheres into which the spent expenditure flows, examines the structure of the expenditure according to the type of expenditure as well as according to an economic classification, identifies the weaknesses of the process, indicates how the allocation of the spent funds could be more effective.

Keywords –environment, environmental economics, environmental expenditure.
Wronskians, total positivity, and real Schubert calculus
Creators: name: Karp, Steven N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14M15, 15B48, 14N15, 14P05, 41A50, 34C10

description: A complete flag in $\mathbb{R}^n$ is a sequence of nested subspaces $V_1 \subset \cdots \subset V_{n-1}$ such that each $V_k$ has dimension $k$. It is called totally nonnegative if all its Plücker coordinates are nonnegative. We may view each $V_k$ as a subspace of polynomials in $\mathbb{R}[x]$ of degree at most $n-1$, by associating a vector $(a_1, \dots, a_n)$ in $\mathbb{R}^n$ to the polynomial $a_1 + a_2x + \cdots + a_nx^{n-1}$. We show that a complete flag is totally nonnegative if and only if each of its Wronskian polynomials $\mathsf{Wr}(V_k)$ is nonzero on the interval $(0, \infty)$. In the language of Chebyshev systems, this means that the flag forms a Markov system or $ECT$-system on $(0, \infty)$. This gives a new characterization and membership test for the totally nonnegative flag variety. Similarly, we show that a complete flag is totally positive if and only if each $\mathsf{Wr}(V_k)$ is nonzero on $[0, \infty]$. We use these results to show that a conjecture of Eremenko (2015) in real Schubert calculus is equivalent to the following conjecture: if $V$ is a finite-dimensional subspace of polynomials such that all complex zeros of $\mathsf{Wr}(V)$ lie in the interval $(-\infty, 0)$, then all Plücker coordinates of $V$ are real and positive. This conjecture is a totally positive strengthening of a result of Mukhin, Tarasov, and Varchenko (2009), and can be reformulated as saying that all complex solutions to a certain family of Schubert problems in the Grassmannian are real and totally positive. We also show that our conjecture is equivalent to a totally positive version of the secant conjecture of Sottile (2003).
description: 25 pages. v2: Updated references. v3: Clarified references to the secant conjecture
title: Felix Stähelin, Die Schweiz in römischer Zeit
Creators: name: Egger, Rudolf
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Felix Stähelin, Die Schweiz in römischer Zeit. Zweite verbesserte Auflage. Basel 1931, Verlag Benno Schwabe & Co. XVI, 603 S. 180 Abb. 1 Karte, 3 Pläne.
Mid-infrared observations of the circumstellar disks around PDS 66 and CRBR 2422.8-3423
Creators: name: Gräfe, Christian
name: Wolf, Sebastian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims: We present mid-infrared observations and photometry of the circumstellar disks around PDS 66 and CRBR 2422.8-3423, obtained with VISIR/VLT in the N band and for the latter also in the Q band. Our aim is to resolve the inner regions of these protoplanetary disks, which carry potential signatures of intermediate or later stages of disk evolution and ongoing planet formation. Methods: We determined the radial brightness profiles of our target objects and the corresponding PSF reference that were observed before and after our target objects. Background standard deviations, the standard errors, and the seeing variations during the observations were considered. Adopting a simple radiative transfer model based on parameters taken from previous studies, we derived constraints on the inner-disk hole radius of the dust disk. Results: Neither of the circumstellar disks around our science targets are spatially resolved in our observations. However, we are able to constrain the inner-disk hole radius to <15.0(+0.5,-0.5) AU and <10.5(+0.5,-1.0) AU for PDS 66 and CRBR 2422.8-3423, respectively. The photometry we performed yields N-band flux densities of 599+-8 mJy for PDS 66 and 130+-14 mJy for CRBR 2422.8-3423, as well as a Q-band flux density of 858+-109 mJy for CRBR 2422.8-3423.
description: Accepted for publication in Astronomy & Astrophysics. (7 pages, including 5 figures and 5 tables)
Tests of Standard Cosmology in Horava Gravity and Bayesian Evidence for a Closed Universe, and the Hubble Tension
Creators: name: Nilsson, Nils A.
name: Park, Mu-In
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider some background tests of standard cosmology in the context of Horava gravity with different scaling dimensions for space and time, which has been proposed as a renormalizable, higher-derivative, Lorentz-violating quantum gravity model without ghost problems. We obtain the "very strong" and "strong" Bayesian evidence for our two cosmology models A and B, respectively, depending on the choice of parametrization based on Horava gravity, against the standard, spatially-flat, LCDM cosmology model based on general relativity. An MCMC analysis with observational data, including BAO, shows (a) preference of a closed universe with the curvature density parameter Omega_k=-0.005+- 0.0007, -0.004+0.003-0.001 and (b) reduction of the Hubble tension with the Hubble constant H_0=71.4+1.2-0.9, 69.5+1.6-0.9 km s^{-1} Mpc^{-1} for the models A, B. We comment on some possible further improvements for the "cosmic-tension problem" by considering more complete early universe physics, based on the Lorentz-violating standard model with anisotropic space-time scaling, consistently with Horava gravity, as well as the observational data which are properly adopted for the closed universe.
description: Changed title, Corrected typos, Added Ref; 23 pages, 6 figures, 2 tables
DFL: High-Performance Blockchain-Based Federated Learning
Creators: name: Tian, Yongding
name: Guo, Zhuoran
name: Zhang, Jiaxuan
name: Al-Ars, Zaid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Many researchers have proposed replacing the aggregation server in federated learning with a blockchain system to improve privacy, robustness, and scalability. In this approach, clients would upload their updated models to the blockchain ledger and use a smart contract to perform model averaging. However, the significant delay and limited computational capabilities of blockchain systems make it inefficient to support machine learning applications on the blockchain. In this paper, we propose a new public blockchain architecture called DFL, which is specially optimized for distributed federated machine learning. Our architecture inherits the merits of traditional blockchain systems while achieving low latency and low resource consumption by waiving global consensus. To evaluate the performance and robustness of our architecture, we implemented a prototype and tested it on a physical four-node network, and also developed a simulator to simulate larger networks and more complex situations. Our experiments show that the DFL architecture can reach over 90\% accuracy for non-I.I.D. datasets, even in the presence of model poisoning attacks, while ensuring that the blockchain part consumes less than 5\% of hardware resources.
description: 20 pages, 11 figures
title: Vodnik po zbirkah Narodnega Muzeja v Ljubljani
Creators: name: Saria, Balduin
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Vodnik po zbirkah Narodnega Muzeja v Ljubljani. Kulturno zgodovinski del. (Führer durch die Sammlungen des Nationalmuseums in Laibach. Kulturhistorischer Teil.) Laibach 1931, Selbstverlag des Nationalmuseums. 185 Seiten mit zahlreichen Abbildungen.
Time-Frequency Analysis based Deep Interference Classification for Frequency Hopping System
Creators: name: Xu, Changzhi
name: Ren, Jingya
name: Yu, Wanxin
name: Jin, Yi
name: Cao, Zhenxin
name: Wu, Xiaogang
name: Jiang, Weiheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: It is known that, interference classification plays an important role in protecting the authorized communication system and avoiding its performance degradation in the hostile environment. In this paper, the interference classification problem for the frequency hopping communication system is discussed. Considering the possibility of presence multiple interferences in the frequency hopping system, in order to fully extract effective features of the interferences from the received signals, the linear and bilinear transform based composite time-frequency analysis method is adopted. Then the time-frequency spectrograms obtained from the time-frequency analysis are constructed as matching pairs and input to the deep neural network for classification. In particular, the Siamese neural network is used as the classifier, where the paired spectrograms are input into the two sub-networks of the deep networks, and these two sub-networks extract the features of the paired spectrograms for interference type classification. The simulation results confirm that the proposed algorithm can obtain higher classification accuracy than both traditional single time-frequency representation based approach and the AlexNet transfer learning or convolutional neural network based methods.
description: 11 pages
A Minmax Utilization Algorithm for Network Traffic Scheduling of Industrial Robots
Creators: name: Wang, Yantong
name: Friderikos, Vasilis
name: Andraos, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Emerging 5G and beyond wireless industrial virtualized networks are expected to support a significant number of robotic manipulators. Depending on the processes involved, these industrial robots might result in significant volume of multi-modal traffic that will need to traverse the network all the way to the (public/private) edge cloud, where advanced processing, control and service orchestration will be taking place. In this paper, we perform the traffic engineering by capitalizing on the underlying pseudo-deterministic nature of the repetitive processes of robotic manipulators in an industrial environment and propose an integer linear programming (ILP) model to minimize the maximum aggregate traffic in the network. The task sequence and time gap requirements are also considered in the proposed model. To tackle the curse of dimensionality in ILP, we provide a random search algorithm with quadratic time complexity. Numerical investigations reveal that the proposed scheme can reduce the peak data rate up to 53.4% compared with the nominal case where robotic manipulators operate in an uncoordinated fashion, resulting in significant improvement in the utilization of the underlying network resources.
description: 6 pages, 4 figures, 2 tables
Data-driven transition path analysis yields a statistical understanding of sudden stratospheric warming events in an idealized model
Creators: name: Finkel, Justin
name: Webber, Robert J.
name: Gerber, Edwin P.
name: Abbot, Dorian S.
name: Weare, Jonathan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Dynamical Systems (math.DS)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Atmospheric regime transitions are highly impactful as drivers of extreme weather events, but pose two formidable modeling challenges: predicting the next event (weather forecasting), and characterizing the statistics of events of a given severity (the risk climatology). Each event has a different duration and spatial structure, making it hard to define an objective "average event." We argue here that transition path theory (TPT), a stochastic process framework, is an appropriate tool for the task. We demonstrate TPT's capacities on a wave-mean flow model of sudden stratospheric warmings (SSWs) developed by Holton and Mass (1976), which is idealized enough for transparent TPT analysis but complex enough to demonstrate computational scalability. Whereas a recent article (Finkel et al. 2021) studied near-term SSW predictability, the present article uses TPT to link predictability to long-term SSW frequency. This requires not only forecasting forward in time from an initial condition, but also \emph{backward in time} to assess the probability of the initial conditions themselves. TPT enables one to condition the dynamics on the regime transition occurring, and thus visualize its physical drivers with a vector field called the \emph{reactive current}. The reactive current shows that before an SSW, dissipation and stochastic forcing drive a slow decay of vortex strength at lower altitudes. The response of upper-level winds is late and sudden, occurring only after the transition is almost complete from a probabilistic point of view. This case study demonstrates that TPT quantities, visualized in a space of physically meaningful variables, can help one understand the dynamics of regime transitions.
description: 18 pages, 7 figures (main text), 19 pages, 1 figure (supplement). Accepted for publication in the Journal of the Atmospheric Sciences
title: Adolf Mahr, Christian Art in Ancient Ireland
Creators: name: Zeiß, Hans
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Adolf Mahr, Christian Art in Ancient Ireland. Selected Objects illustrated and described. Volume I. Dublin 1932, Stationary Office of Saorstát Éireann. [Zu beziehen vom Government Publications Sale Office, 5 Nassau Street, Dublin.]
Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
Creators: name: Gangopadhyay, Mayukh R.
name: Jain, Jayesh C.
name: Sharma, Devanshu
name: Yogesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In a class of single field models of inflation, the idea of Primordial Black holes(PBHs) production is studied. In this case, the dynamics on small cosmological scales differs significantly from that of the large scales probed by the observations of cosmic microwave background(CMB). This difference becomes a virtue in producing correct physical ambiance for the seeds required to produce PBHs. Thus, once the perturbed scales renter the horizon of our Universe during the later epochs of radiation domination and subsequent matter domination, these seeds collapses to produce PBHs. We have shown, in this class of model, depending on the model parameters and the class defining set parameters, one can have PBHs formed for a vast mass ranges from $10^{-18}$ to $10^{-6}$ solar mass(\(\textup{M}_\odot\)). We have also shown, for a particular class of model, the total dark matter density today can be attributed to the PBHs density. The vast range of the mass depending on the class parameter, gives ample opportunity to study enriched phenomenological implications associated with this model to probe the nascent Universe dynamics.
description: 17 pages, 6 figures, Some minor typos are corrected
title: Hubert Schmidt, Cucuteni in der oberen Moldau, Rumänien. Die befestigte Siedlung mit bemalter Keramik von der Steinkupferzeit bis in die vollentwickelte Bronzezeit
Creators: name: Reinecke, Paul
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Hubert Schmidt, Cucuteni in der oberen Moldau, Rumänien. Die befestigte Siedlung mit bemalter Keramik von der Steinkupferzeit bis in die vollentwickelte Bronzezeit. Berlin und Leipzig 1932, Verlag von Walter de Gruyter & Co. VII und 131 S., 40 Taf., darunter 1 farbige, 4 Beil, und 21 Abb. im Text.
Magnetization Reversal in Two-dimensional Ensemble of Nanoparticles with Positional Defects
Creators: name: Anand, Manish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study relaxation behaviour in the two-dimensional assembly of magnetic nanoparticles (MNPs) with aligned anisotropy axes and positional defects. The anisotropy axes orientation and disorder strength is changed by varying $α$ and $Δ$, respectively. The magnetization decay does not depend on the aspect ratio $A^{}_r$ of the system and $Δ$ for small dipolar interaction strength $h^{}_d=0.2$. Remarkably, the magnetization decays rapidly for considerable $h^{}_d$ with negligible $Δ$ and $A_r=1.0$. The dipolar interaction of enough strength promotes antiferromagnetic coupling in square ensembles of MNPs. There is a prolonged magnetization decay for large $Δ$ because of enhancement in ferromagnetic coupling. Notably, magnetization relaxes slowly for $α<α^\star$ even with moderate $h^{}_d$ and a significant $A^{}_r$. Interestingly, the slowing down of the magnetic relaxation shifts to a lower $α^{\star}$ with $h^{}_d=1.0$. The magnetization ceases to relax for $α\leq60^\circ$ and $h^{}_d\leq0.6$ due to large shape anisotropy with $A^{}_r=400.0$. Remarkably, a majority of the magnetic moment reverses its direction by $180^\circ$ for $α>60^\circ$ and large $h^{}_d$, resulting in the negative magnetization. The effective Néel relaxation time $τ^{}_N$ also depends strongly on these parameters. $τ^{}_N$ depends weakly on $α$ and $Δ$ for $h^{}_d\leq0.2$, irrespective of $A^{}_r$. On the other hand, $τ^{}_N$ decreases with $α$ for significant $h^{}_d$ provided $α$ is greater than $45^\circ$ because of antiferromagnetic coupling dominance. In a highly anisotropic system, there is an enhancement in $τ^{}_N$ with $α$ ($\leq30^\circ$) even with moderate $h^{}_d$. While for $α>30^\circ$, $τ^{}_N$ decreases with $α$. These observations are useful in novel materials, spintronics based applications, etc.
description: 22 pages, 8 figures
NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results
Creators: name: Smart, R. L.
name: Tinney, C. G.
name: Bucciarelli, B.
name: Marocco, F.
name: Abbas, U.
name: Andrei, A.
name: Bernardi, G.
name: Burningham, B.
name: Cardoso, C.
name: Costa, E.
name: Crosta, M. T.
name: Dapra, M.
name: Day-Jones, A.
name: Goldman, B.
name: Jones, H. R. A.
name: Lattanzi, M. G.
name: Leggett, S. K.
name: Lucas, P.
name: Mendez, R.
name: Penna, J. L.
name: Pinfield, D.
name: Smith, L.
name: Sozzetti, A.
name: Vecchiato, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The discovery and subsequent detailed study of T dwarfs has provided many surprises and pushed the physics and modeling of cool atmospheres in unpredicted directions. Distance is a critical parameter for studies of these objects to determine intrinsic luminosities, test binarity and measure their motion in the Galaxy. We describe a new observational program to determine distances across the full range of T dwarf sub-types using the NTT/SOFI telescope/instrument combination. We present preliminary results for ten objects, five of which represent new distances.
description: 11 pages, 6 figrues, accepted by MNRAS
Spectra of Bethe subalgebras of $Y(\mathfrak{gl}_n)$ in tame representations
Creators: name: Ilin, Aleksei
name: Mashanova-Golikova, Inna
name: Rybnikov, Leonid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We study the eigenproblem for Bethe subalgebras of the Yangian $Y(\mathfrak{gl}_n)$ in tame representations, i.e. in finite dimensional representations which admit Gelfand-Tsetlin bases. Namely, we prove that for any tensor product of skew modules $V=\otimes_{i=1}^k V_{λ_i \setminus μ_i}(z_i)$ over the Yangian $Y(\mathfrak{gl}_n)$ with generic $z_i$'s, the family of Bethe subalgebras $B(X)$ with $X$ being a regular element of the maximal torus of $GL_n$ (or, more generally, with $X \in \overline{M_{0,n+2}}$) acts with a cyclic vector on $V$. Moreover, for $X$ in the real form of $\overline{M_{0,n+2}}$ which is the closure of regular unitary diagonal matrices we show, that the family of subalgebras $B(X)$ acts with simple spectrum on $\otimes_{i=1}^k V_{λ_i \setminus μ_i}(z_i)$ for generic $z_i$'s where all $V_{λ_i \setminus μ_i}(z_i)$ are Kirillov-Reshetikhin modules. In the subsequent paper we will use this to define a KR-crystal structure on the spectrum of a Bethe subalgebra on $V$.
Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal
Creators: name: Wang, Kunpeng
name: Maljuk, Andrey
name: Blum, Christian G. F.
name: Kolb, Thomas
name: Jähne, Carsten
name: Grafe, Hans-Joachim
name: Giebeler, Lars
name: Meyer, Hans-Peter
name: Wurmehl, Sabine
name: Klingeler, Rüdiger
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ni-doped LiMn0.95Ni0.05PO4 single crystals have been grown for the first time by the travelling-solvent floating-zone method at low Argon pressure. The grown sample exhibits large single crystalline grains as revealed by means of polarization microscopy and X-ray Laue back scattering. The composition of the crystal was determined by Energy-dispersive X-ray spectroscopy. LiMn0.95Ni0.05PO4 orders in an orthorhombic olivine-like structure as expected and phase purity was confirmed by powder X-ray diffraction. An oriented cuboid with size of 2.4 x 2.5 x 2.7 mm3 along a, b, and c crystalline directions, respectively, was used for anisotropic magnetic measurements.
Uniformly distributed sequences generated by a greedy minimization of the $L_2$ discrepancy
Creators: name: Kritzinger, Ralph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11K06, 11K31, 11K38

description: The aim of this paper is to develop greedy algorithms which generate uniformly distributed sequences in the $d$-dimensional unit cube $[0,1]^d$. The figures of merit are three different variants of $L_2$ discrepancy. Theoretical results along with numerical experiments suggest that the resulting sequences have excellent distribution properties. The approach we follow here is motivated by recent work of Steinerberger and Pausinger who consider similar greedy algorithms, where they minimize functionals that can be related to the star discrepancy or energy of point sets. In contrast to many greedy algorithms where the resulting elements of the sequence can only be given numerically, we will find that in the one-dimensional case our algorithms yield rational numbers which we can describe precisely. In particular, we will observe that any initial segment of a sequence in $[0,1)$ can be naturally extended to a uniformly distributed sequence where all subsequent elements are of the form $x_N=\frac{2n-1}{2N}$ for some $n\in\{1,\dots,N\}$. We will also investigate the dependence of the $L_2$ discrepancy of the resulting sequences on the dimension $d$.
description: 24 pages, 4 figures
Alchemilla
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: ALCHEMILLA L. Vgl. Besse et Vaccari Lit. 1909; Buser Lit. 1903 und 1905; Buser ap. Jaquet Lit. 1907; R.Keller Lit. 1908 und 1933;Vaccariet BuserLit. 1906. Die Verbreitung der Kleinarten der Untergattung Ea-Alchemilla ist noch sehr mangelhaft bekannt. Untergattung Aphanes (L.) Focke
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Regularity improvement for the minimizers of the two-dimensional Griffith energy
Creators: name: Labourie, Camille
name: Lemenant, Antoine
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49Q20

description: In this paper we prove that the singular set of connected minimizers of the planar Griffith functional has Hausdorff dimension strictly less then one, together with the higher integrability of the symetrized gradient.
description: Minor corrections
OPE statistics from higher-point crossing
Creators: name: Anous, Tarek
name: Belin, Alexandre
name: de Boer, Jan
name: Liska, Diego
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present new asymptotic formulas for the distribution of OPE coefficients in conformal field theories. These formulas involve products of four or more coefficients and include light-light-heavy as well as heavy-heavy-heavy contributions. They are derived from crossing symmetry of the six and higher point functions on the plane and should be interpreted as non-Gaussianities in the statistical distribution of the OPE coefficients. We begin with a formula for arbitrary operator exchanges (not necessarily primary) valid in any dimension. This is the first asymptotic formula constraining heavy-heavy-heavy OPE coefficients in $d>2$. For two-dimensional CFTs, we present refined asymptotic formulas stemming from exchanges of quasi-primaries as well as Virasoro primaries.
description: 30 pages + appendices, 7 figures; v2 references and footnotes added
Double cohomology of moment-angle complexes
Creators: name: Limonchenko, Ivan
name: Panov, Taras
name: Song, Jongbaek
name: Stanley, Donald
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 13F55, 55N10, 55S20, 57S12

description: We put a cochain complex structure ${CH}^*(\mathcal Z_K)$ on the cohomology of a moment-angle complex $\mathcal Z_K$ and call the resulting cohomology the double cohomology, ${HH}^*(\mathcal Z_K)$. We give three equivalent definitions for the differential, and compute ${HH}^*(\mathcal Z_K)$ for a family of simplicial complexes containing clique complexes of chordal graphs.
description: 25 pages, 4 figures, published version
title: Die spätbarocken Giebelstuckaturen von Johann Michael Feichtmayr dem Jüngeren am Corps de Logis des Bruchsaler Schlosses. Zur Restaurierung eines Fassadenstucks aus dem 18. Jahrhundert
Creators: name: Glaser, Wilhelm
Publisher: name: University Library Heidelberg
Year: 2016

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 45, Nr. 2 (2016), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Existence and asymptotic behavior of non-normal conformal metrics on $\mathbb{R}^4$ with sign-changing $Q$-curvature
Creators: name: Bernardini, Chiara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J60, 35J30

description: We consider the following prescribed $Q$-curvature problem \begin{equation}\label{uno} \begin{cases} Δ^2 u=(1-|x|^p)e^{4u}, \quad\text{on}\,\,\mathbb{R}^4\\ Λ:=\int_{\mathbb{R}^4}(1-|x|^p)e^{4u}dx<\infty. \end{cases} \end{equation} We show that for every polynomial $P$ of degree 2 such that $\lim\limits_{|x|\to+\infty}P=-\infty$, and for every $Λ\in(0,Λ_\mathrm{sph})$, there exists at least one solution which assume the form $u=w+P$, where $w$ behaves logarithmically at infinity. Conversely, we prove that all solutions have the form $v+P$, where $$v(x)=\frac{1}{8π^2}\int\limits_{\mathbb{R}^4}\log\left(\frac{|y|}{|x-y|}\right)(1-|y|^p)e^{4u}dy$$ and $P$ is a polynomial of degree at most 2 bounded from above. Moreover, if $u$ is a solution to the previous problem, it has the following asymptotic behavior $$u(x)=-\fracΛ{8π^2}\log|x|+P+o(\log|x|),\quad\text{as}\,\,|x|\to+\infty.$$ As a consequence, we give a geometric characterization of solutions in terms of the scalar curvature at infinity of the associated conformal metric $e^{2u}|dx|^2$.
Mapping of coherent structures in parameterized flows by learning optimal transportation with Gaussian models
Creators: name: Iollo, Angelo
name: Taddei, Tommaso
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N30, 41A45, 41A46, 65D05, 35L02

description: We present a general (i.e., independent of the underlying model) interpolation technique based on optimal transportation of Gaussian models for parametric advection-dominated problems. The approach relies on a scalar testing function to identify the coherent structure we wish to track; a maximum likelihood estimator to identify a Gaussian model of the coherent structure; and a nonlinear interpolation strategy that relies on optimal transportation maps between Gaussian distributions. We show that well-known self-similar solutions can be recast in the frame of optimal transportation by appropriate rescaling; we further present several numerical examples to motivate our proposal and to assess strengths and limitations; finally, we discuss an extension to deal with more complex problems.
title: Mit Laserscanner und Dendrobohrer Mörikes „Kugelbahn“ auf der Spur. Eine Kegelbahn des 18. Jahrhunderts in Tübingen
Creators: name: Numberger, Markus
Publisher: name: University Library Heidelberg
Year: 2016

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 45, Nr. 2 (2016), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Die Landesdenkmalpflege
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2016

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 45, Nr. 2 (2016), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Carex nitida Buser
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. nitida Buser l: Unterwallis (Buser); Salanfe; Vernayaz-Salvan; Les Marecottes; Gueuroz (alles: Coquoz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556