cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integrable Digital Quantum Simulation: Generalized Gibbs Ensembles and Trotter Transitions
Creators: name: Vernier, Eric
name: Bertini, Bruno
name: Giudici, Giuliano
name: Piroli, Lorenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Trotter-Suzuki decomposition is a promising avenue for digital quantum simulation (DQS), approximating continuous-time dynamics by discrete Trotter steps of duration $τ$. Recent work suggested that DQS is typically characterized by a sharp Trotter transition: when $τ$ is increased beyond a threshold value, approximation errors become uncontrolled at large times due to the onset of quantum chaos. Here we contrast this picture with the case of \emph{integrable} DQS. We focus on a simple quench from a spin-wave state in the prototypical XXZ Heisenberg spin chain, and study its integrable Trotterized evolution as a function of $τ$. Due to its exact local conservation laws, the system does not heat up to infinite temperature and the late-time properties of the dynamics are captured by a discrete Generalized Gibbs Ensemble (dGGE). By means of exact calculations we find that, for small $τ$, the dGGE depends analytically on the Trotter step, implying that discretization errors remain bounded even at infinite times. Conversely, the dGGE changes abruptly at a threshold value $τ_{\rm th}$, signaling a novel type of Trotter transition. We show that the latter can be detected locally, as it is associated with the appearance of a non-zero staggered magnetization with a subtle dependence on $τ$. We highlight the differences between continuous and discrete GGEs, suggesting the latter as novel interesting nonequilibrium states exclusive to digital platforms.
description: 7+14 pages, 3+5 figures; v2: minor revision, appendix added
Competing ordered structures formed by particles with a regular tetrahedral patch decoration
Creators: name: Doppelbauer, G.
name: Noya, E. G.
name: Bianchi, E.
name: Kahl, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the ordered equilibrium structures of patchy particles where the patches are located on the surface of the colloid such that they form a regular tetrahedron. Using optimization techniques based on ideas of evolutionary algorithms we identify possible candidate structures. We retain not only the energetically most favourable lattices but also include a few energetically less favourable particle arrangements (i.e., local minima on the enthalpy landscape). Using suitably developed Monte Carlo based simulations techniques in an NPT ensemble we evaluate the thermodynamic properties of these candidate structures along selected isobars and isotherms and identify thereby the respective ranges of stability. We demonstrate on a quantitative level that the equilibrium structures at a given state point result from a delicate compromise between entropy, energy (i.e., the lattice sum) and packing.
description: 17 pages, 6 figures J. Phys. Condens. Matter, 24 (2012), in press
Myotis oxyotus subsp. gardneri La Val 1973
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis oxyotus
Myotis oxyotus gardneri

description: Myotis oxyotus gardneri.
 COSTA RICA (n = 3) San José, Fila la Máquina (LSUMZ 12924* [holotype], 12917*,12929*). PANAMA (n = 3) Cerro Punta (USNM 318386*), Finca Lara (USNM 318869*, 318870*).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
$C$ and $CP$ violation in effective field theories
Creators: name: Akdag, Hakan
name: Kubis, Bastian
name: Wirzba, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The quest for new sources of the simultaneous violation of $C$ and $CP$ symmetry was popular in the 1960s and has since been mostly neglected for more than half a century. In this work we revisit fundamental quark-level operators that break $C$ and $CP$ up to and including mass dimension 8 for flavor-conserving transitions, relying on the complete operator sets of the so-called Standard Model effective field theory and the low-energy effective field theory. With the formalism of chiral perturbation theory, we match these quark operators to light-meson physics, derive $C$- and $CP$-odd Lagrangians for several processes in the $η$, $η'$, and pion sectors, and furthermore, as a proof of principle, give estimates for the respective observables in explicit dependence of the underlying high-energy scale for new physics.
description: 76 pages, 1 figure, 12 tables; v2: discussion extended, references added, version published in JHEP
The Container: A Journey Through Installation, Containment and PoliticsA Journey Through Installation, Containment and Politics
Creators: name: Sinnott, Michael Edward
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Theater
subject: Scenography
subject: Theatre Design
subject: Drama

description: The intention of this artist statement is to demonstrate proficiency in scenic, costume and lighting design for the theatre. These design elements were created for the production of Clare Bayley’s play The Container, directed by Muhammad Azri Ali and presented in the University Theatre at the University of Calgary from October 20-31, 2015. The following essay is an outline of my process from preliminary design concepts to the fully realized production through research and readings of the play.
An Efficient Method for Mining Event-Related Potential Patterns
Creators: name: Mousavi, Seyed Aliakbar
name: Arshad, Muhammad Rafie Hj
name: Mohamed, Hasimah Hj
name: Alomari, Saleh Ali
Publisher: name: arXiv
Year: 2012
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In the present paper, we propose a Neuroelectromagnetic Ontology Framework (NOF) for mining Event-related Potentials (ERP) patterns as well as the process. The aim for this research is to develop an infrastructure for mining, analysis and sharing the ERP domain ontologies. The outcome of this research is a Neuroelectromagnetic knowledge-based system. The framework has 5 stages: 1) Data pre-processing and preparation; 2) Data mining application; 3) Rule Comparison and Evaluation; 4) Association rules Post-processing 5) Domain Ontologies. In 5th stage a new set of hidden rules can be discovered base on comparing association rules by domain ontologies and expert rules.
Wigner Measure Propagation and Conical Singularity for General Initial Data
Creators: name: Fermanian-Kammerer, Clotilde
name: Gérard, Patrick
name: Lasser, Caroline
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study the evolution of Wigner measures of a family of solutions of a Schrödinger equation with a scalar potential displaying a conical singularity. Under a genericity assumption, classical trajectories exist and are unique, thus the question of the propagation of Wigner measures along these trajectories becomes relevant. We prove the propagation for general initial data.
description: 24 pages, 1 figure
Network of chiral one-dimensional channels and localized states emerging in a moiré system
Creators: name: Park, Jeyong
name: Gresista, Lasse
name: Trebst, Simon
name: Rosch, Achim
name: Park, Jinhong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Moiré systems provide a highly tunable platform for engineering band structures and exotic correlated phases. Here, we theoretically study a model for a single layer of graphene subject to a smooth moiré electrostatic potential, induced by an insulating substrate layer. For sufficiently large moiré unit cells, we find that ultra-flat bands coexist with a triangular network of chiral one-dimensional (1D) channels. These channels mediate an effective interaction between localized modes with spin-, orbital- and valley degrees of freedom emerging from the flat bands. The form of the interaction reflects the chiralilty and 1D nature of the network. We study this interacting model within an $SU(4)$ mean-field theory, semi-classical Monte-Carlo simulations, and an $SU(4)$ spin-wave theory, focusing on commensurate order stabilized by local two-site and chiral three-site interactions. By tuning a gate voltage, one can trigger a non-coplanar phase characterized by a peculiar coexistence of three different types of order: ferromagnetic spin order in one valley, non-coplanar chiral spin order in the other valley, and 120$^\circ$ order in the remaining spin and valley-mixed degrees of freedom. Quantum and classical fluctuations have qualitatively different effects on the observed phases and can, for example, create a finite spin-chirality purely via fluctuation effects.
description: 8 pages for the main text, 12 pages for the supplemental material, 13 (6+7) figures. This version includes the new sections VI. Classical fluctuations and V. Quantum fluctuations, and the corresponding supplementary. Corrected author name
Southern Pride and Yankee Presence: The Limits of Confederate Loyalty in Civil War Mississippi, 1860-1865
Creators: name: Ruminski, Jarret
Publisher: name: Arts
Year: 2013
Subjects: subject: History--Modern
subject: History--United States
subject: Mississippi
subject: South
subject: Civil War
subject: Loyalty
subject: Nationalism
subject: Desertion
subject: Contraband

description: This study uses Mississippi from 1860 to 1865 as a case-study of Confederate nationalism. It employs interdisciplinary literature on the concept of loyalty to explore how multiple allegiances influenced people during the Civil War. Historians have generally viewed Confederate nationalism as weak or strong, with white southerners either united or divided in their desire for Confederate independence. This study breaks this impasse by viewing Mississippians through the lens of different, co-existing loyalties that in specific circumstances indicated neither popular support for nor rejection of the Confederacy. It focuses on wartime activities like swearing the Federal oath, illicit trade with the Union army, and Confederate desertion to show how Mississippians acted on co-existent loyalty layers to self, family, and friend-networks that were distinct from national allegiances. Although the Confederate government espoused an all-consuming nationalism, the evidence presented in this study demonstrates the limited control that the Confederacy, the Union, and, by implication, most modern nation states, exerted over their subjects. This study also explores the relationship between race and loyalty. It demonstrates how an internal war between slaveholders, who expected slaves to only express servile loyalty to their masters, and slaves, who resisted white authority by acting on loyalties to self, family, neighborhood, and nation, revealed a struggle over the racial hierarchy that demonstrated continuity between the antebellum, Civil War, and Reconstruction eras.
Location-aware Adaptive Normalization: A Deep Learning Approach For Wildfire Danger Forecasting
Creators: name: Eddin, Mohamad Hakam Shams
name: Roscher, Ribana
name: Gall, Juergen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Climate change is expected to intensify and increase extreme events in the weather cycle. Since this has a significant impact on various sectors of our life, recent works are concerned with identifying and predicting such extreme events from Earth observations. With respect to wildfire danger forecasting, previous deep learning approaches duplicate static variables along the time dimension and neglect the intrinsic differences between static and dynamic variables. Furthermore, most existing multi-branch architectures lose the interconnections between the branches during the feature learning stage. To address these issues, this paper proposes a 2D/3D two-branch convolutional neural network (CNN) with a Location-aware Adaptive Normalization layer (LOAN). Using LOAN as a building block, we can modulate the dynamic features conditional on their geographical locations. Thus, our approach considers feature properties as a unified yet compound 2D/3D model. Besides, we propose using the sinusoidal-based encoding of the day of the year to provide the model with explicit temporal information about the target day within the year. Our experimental results show a better performance of our approach than other baselines on the challenging FireCube dataset. The results show that location-aware adaptive feature normalization is a promising technique to learn the relation between dynamic variables and their geographic locations, which is highly relevant for areas where remote sensing data builds the basis for analysis. The source code is available at https://github.com/HakamShams/LOAN.
Myotis riparius
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis riparius

description: Myotis riparius.
 BOLIVIA (n = 1): Cochabamba, Sajta (MSB 70383); ARGENTINA (n = 1): Tucumán, Tafí Viejo. 5 km S.W. Siambon (SNOMNH 36220). ECUADOR (n = 1): Esmeraldas, Comuna San Francisco de Bogotá (TTU 102833). PARAGUAY (n = 1): Department of Canindeyu, Reserva Natural Privada Itabo (TTU 99378).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
Prime ends for domains in metric spaces
Creators: name: Adamowicz, Tomasz
name: Bjorn, Anders
name: Bjorn, Jana
name: Shanmugalingam, Nageswari
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 30D40, 30L99, 31B15, 31B25, 31C45, 31E05, 35J66, 54F15, 54F35

description: In this paper we propose a new definition of prime ends for domains in metric spaces under rather general assumptions. We compare our prime ends to those of Carathéodory and Näkki. Modulus ends and prime ends, defined by means of the \p-modulus of curve families, are also discussed and related to the prime ends. We provide characterizations of singleton prime ends and relate them to the notion of accessibility of boundary points, and introduce a topology on the prime end boundary. We also study relations between the prime end boundary and the Mazurkiewicz boundary. Generalizing the notion of John domains, we introduce almost John domains, and we investigate prime ends in the settings of John domains, almost John domains and domains which are finitely connected at the boundary.
description: 46 pages, 4 figures
Quantum recoherence in the early universe
Creators: name: Colas, Thomas
name: Grain, Julien
name: Vennin, Vincent
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Despite being created through a fundamentally quantum-mechanical process, cosmological structures have not yet revealed any sign of genuine quantum correlations. Among the obstructions to the direct detection of quantum signatures in cosmology, environmental-induced decoherence is arguably one of the most inevitable. Yet, we discover a mechanism of quantum recoherence for the adiabatic perturbations when they couple to an entropic sector. After a transient phase of decoherence, a turning point is reached, recoherence proceeds and adiabatic perturbations exhibit a large amount of self-coherence at late-time. This result is also understood by means of a non-Markovian master equation, which reduces to Wilsonian effective-field theory in the unitary limit. This allows us to critically assess the validity of open-quantum-system methods in cosmology and to highlight that re(de)coherence from linear interactions has no flat-space analogue.
description: 5 + 12 pages, 4 + 2 figures, matches published version in EPL
On semiclassical calculation of three-point functions in AdS_5 \times T^(1,1)
Creators: name: Michalcik, Michal
name: Rashkov, Radoslav C.
name: Schimpf, Maria
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently there has been progress on the computation of two- and three-point correlation functions with two "heavy" states via semiclassical methods. We extend this analysis to the case of AdS_5 \times T^(1,1), and examine the suggested procedure for the case of several simple string solutions. By making use of AdS/CFT duality, we derive the relevant correlation functions of operators belonging to the dual gauge theory.
description: 18 pages, added reference
Leptidea juvernica Williams 1946
Creators: name: Wieser, Christian
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Pieridae
Leptidea
Leptidea juvernica

description: Leptidea juvernica Williams, 1946
Dass die Schwesternart des Senfweisslings (Leptidea sinapis) auch in Kärnten beheimatet ist, wird bereits bei HUEMER 2013 bestätigt. Längere Zeit wurde die bei uns beheimatete Schwesternart als Leptidea reali bezeichnet. Dieses Taxon bezeichnet aber nach neuen Erkenntnissen eine dritte weiter westlich verbreitete Species (DINCA et al. 2011). Mehrere Überprüfungen mittels Barcodes haben nunmehr aus unterschiedlichsten Lebensräumen und Teilen Kärntens belegt, dass beide äusserlich kaum unterscheidbaren Arten parallel auftreten. Folgende Fundorte sind für Leptidea juvernica mittels genetischem Print belegt:
Reinegg, Magerrasen 23.4.2008 (Barcodekenndaten in BOLD: KLM Lep 08376/LEASS871-17); Pirka 2.4.2011 (Barcodekenndaten in BOLD: KLM Lep 08379/LEASS874-17); Villach, Spitzeckweg, 27.6.2017 (Barcodekenndaten in BOLD: KLM Lep 08775/LEAST1440-18); Ferlach, Loiblbachmündung (Barcodekenndaten in BOLD: 21.8.2017 KLM Lep 08776/LEAST1441-18).
description: Published as part of Wieser, Christian, 2017, Weitere Erstfunde und bemerkenswerte Schmetterlingsnachweise aus Kärnten (Insecta: Lepidoptera), pp. 285-291 in Rudolfinum – Jahrbuch des Landesmuseums für Kärnten 2017 on page 290, DOI: 10.5281/zenodo.5725317
Generalized-Equiangular Geometry CT: Concept and Shift-Invariant FBP Algorithms
Creators: name: Xia, Yingxian
name: Chen, Zhiqiang
name: Zhang, Li
name: Xing, Yuxiang
name: Gao, Hewei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: With advanced X-ray source and detector technologies being continuously developed, non-traditional CT geometries have been widely explored. Generalized-Equiangular Geometry CT (GEGCT) architecture, in which an X-ray source might be positioned radially far away from the focus of arced detector array that is equiangularly spaced, is of importance in many novel CT systems and designs. GEGCT, unfortunately, has no theoretically exact and shift-invariant analytical image reconstruction algorithm in general. In this study, to obtain fast and accurate reconstruction from GEGCT and to promote its system design and optimization, an in-depth investigation on a group of approximate Filtered BackProjection (FBP) algorithms with a variety of weighting strategies has been conducted. The architecture of GEGCT is first presented and characterized by using a normalized-radial-offset distance (NROD). Next, shift-invariant weighted FBP-type algorithms are derived in a unified framework, with pre-filtering, filtering, and post-filtering weights. Three viable weighting strategies are then presented including a classic one developed by Besson in the literature and two new ones generated from a curvature fitting and from an empirical formula, where all of the three weights can be expressed as certain functions of NROD. After that, an analysis of reconstruction accuracy is conducted with a wide range of NROD. We further stretch the weighted FBP-type algorithms to GEGCT with dynamic NROD. Finally, the weighted FBP algorithm for GEGCT is extended to a three-dimensional form in the case of cone-beam scan with a cylindrical detector array.
description: 31 pages, 13 figures
On the mutual effect of ion temperature gradient instabilities and impurity peaking in the reversed field pinch
Creators: name: Predebon, I.
name: Carraro, L.
name: Angioni, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The presence of impurities is considered in gyrokinetic calculations of ion temperature gradient (ITG) instabilities and turbulence in the reversed field pinch device RFX-mod. This device usually exhibits hollow Carbon/Oxygen profiles, peaked in the outer core region. We describe the role of the impurities in ITG mode destabilization, and analyze whether ITG turbulence is compatible with their experimental gradients.
description: 19 pages, 9 figures, accepted for publication in Plasma Phys. Control. Fusion
Moral uncertainty promotes prosocial behavior : exploring the self-signaling motivation for prosocial behavior
Creators: name: Chin, Jason M.
Publisher: name: University of British Columbia
Year: 2010

description: Self-signaling theory posits that individuals engage in prosocial behavior in order to gain positive information about the self. Previous self-regulatory approaches to prosocial behavior have primarily focused on helping as means to self-repair (e.g., the negative state relief model), or as a means to stay self-consistent (e.g., self-verification theory), thus overlooking the motivation to obtain self-knowledge. Four studies tested a key prediction of self-signaling theory, that uncertainty about the self as a good and moral person should increase prosocial behavior, while certainty should decrease it. Study one used a correlational design to examine the relationship between personal uncertainty and volunteerism. Study two manipulated uncertainty about a positive moral characteristic and measured subsequent agreement to help. Study three examined the effect of uncertainty about a negative moral trait on helping behavior. Finally, study four manipulated both uncertainty, and the valence of self-information, while measuring charitable donations. All four studies find the hypothesized positive relationship between uncertainty and prosocial behavior. These findings support the idea that individuals help in order to gain information indicating they are good and virtuous, thus decreasing uncertainty about the self. Limitations, implications, and future directions are discussed.
Emission models and EBL as a tool to measure the redshift of BL Lac objects
Creators: name: Mankuzhiyil, Nijil
name: Ansoldi, Stefano
name: De Caneva, Gessica
name: Persic, Massimo
name: Tavecchio, Fabrizio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We introduce a new method to determine the redshift of unknown-redshift BL Lac Objects. The method relies on simultaneous multi-wavelength (MWL) observations of BL Lac objects in optical, X-ray, HE (E>100 MeV) gamma-rays and VHE (E>100 GeV)gamma-rays. It involves best-fitting spectral energy distribution (SED) from optical through HE gamma-rays with a Synchrotron-Self-Compton (SSC) model. We extrapolate such best fitting model into VHE regime, and assume that it represents the intrinsic emission of the object. We then compare the observed VHE flux which has been affected by the interaction with Extragalactic Background Light (EBL). Constraining the measured vs intrinsic emission leads to the determination of gamma-gamma opacity. Comparing the obtained opacity with the predicted opacity based on EBL model, we obtain the redshift of the photon source.
description: 2 pages, 2 figures
Novel Approach to Identify and Localize Chemical Leakages in Pipelines
Creators: name: Wei, Xiaomeng
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Chemical
subject: Engineering--Electronics and Electrical
subject: Engineering--Environmental
subject: Engineering--Industrial
subject: Engineering--Mechanical
subject: Psychology--Developmental
subject: Pipeline
subject: Chemical Sensor
subject: Leak detection
subject: Electronics
subject: Sensing system
subject: Conductive Mesh
subject: Sprayon
subject: Leak localization

description: This study investigates a novel approach for identifying and localizing chemical leakages utilizing mesh-based electronic instruments and surface coating techniques. The proposed leak detection system includes one or more layers of flexible mesh electrodes formed by discrete conductive/nonconductive filaments. It is wrapped on top of the 3D structure needing to be monitored and coated with nano-composite based sensing material. The hydrocarbon sensing is performed by the chemiresistive properties of the sensing material coated on top of the filaments. During the monitoring, whenever the structure experiences changes in the hydrocarbon concentration level to which it is exposed, the sensing material will capture the changes and convert them to resistive changes. The conductive filaments in the mesh will then transmit the electrical signals gathered from the coating to the onsite electronic system. This electronic system is able to perform early stage data processing such as scanning, driving, calibrating and remote communication.
Conceptualization of an AI-based Skills Forecasting Model for Small and Medium-Sized Enterprises (SMEs)
Creators: name: Frierson, Charlotte
name: Wrobel, Jana
name: Senderek, Roman
name: Stich, Volker
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Machine Learning
subject: Skills Management
subject: Skills Forecasting
subject: Competencies
subject: AI
subject: Employee Qualification
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Forecasting-based skills management, which is oriented to the respective corporate goals, is gaining enormous importance as a central management tool. The aim is to predict future skills requirements and match them with existing interorganizational skills. Companies are required to anticipate changes in markets, industries, and technologies at an early stage as well as to identify changes in job profiles within an occupational profile by tapping into and evaluating various data sources. Based on these findings, they can then make informed decisions regarding skill gaps, for example, to implement targeted further training measures. Forecasting-based skills management offers the opportunity to optimally qualify employees for constantly changing tasks. At the same time, however, the targeted development of such skills requires a high level of time, financial and personnel resources, which small and medium-sized enterprises (SMEs) generally do not have at their disposal. In addition, many SMEs are not yet aware of the importance of this issue. Within the framework of research and industrial projects of the Smart Work department at the FIR (Institute for Industrial Management) at the RWTH Aachen University, an AI-based skills forecasting tool will be developed. The goal of the paper is to conceptualize the future machine learning method, that is able to generate individualized skills forecasts and recommendations for SMEs. This is achieved by linking societal forecasts and sector trends with company-specific conditions and skills. In order to generate a corresponding database, the derivation system is made available to various companies (large companies and SMEs) in order to obtain as many data sets as possible. The data sets obtained via the derivation system are then used as training data sets for the machine learning method, with the help of which an automatic derivation of competencies depending on new trends is to be made possible.
Estimation of Glacier Surface Melt from Low-Elevation Station Data
Creators: name: Rozek, Anne
Publisher: name: Graduate Studies
Year: 2016
Subjects: Geography

description: There is a growing need to accurately model the extent that glacial melt and runoff are affected by climate change. Measurement and modelling of fields in a glacial melt model is difficult due to complex mountain terrain. The variance of meteorological fields between measurement locations and glaciers lacks precision as geographic and terrain differences render interpolation difficult and inaccurate. This project ameliorates this issue for the Canadian Rockies by calculating how melt model parameters vary between Haig Glacier and ‘reference stations’ in Calgary, the mountain parks, and NARR. Regression and correlation analyses determine which stations accurately predict conditions on Haig Glacier for critical variables. If a statistically strong relationship is present, a transfer function is calculated between the given sites for the given variable. This function is then used in a glacial melt model to determine the extent to which conditions on Haig can be predicted from more accessible locations.
Application of a Reinforcement Learning-based Automated Order Release in Production
Creators: name: Schuh, Günther
name: Schmitz, Seth
name: Maetschke, Jan
name: Janke, Tim
name: Eisbein, Hendrik
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Reinforcement Learning
subject: Order Release
subject: Simulation
subject: Job Shop Production
subject: Agent
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The importance of job shop production is increasing in order to meet the customer-driven greater demand for products with a larger number of variants in small quantities. However, it also leads to higher requirements for the production planning and control. In order to meet logistical target values and customer needs, one approach is the focus on dynamic planning systems, which can reduce ad-hoc control interventions in the running production. In particular, the release of orders at the beginning of the production process has a high influence on the planning quality. Previous approaches used advanced methods such as combinations of reinforcement learning (RL) and simulation to improve specific production environments, which are sometimes highly simplified and not practical enough. This paper presents a practice-based application of an automated order release procedure based on RL using the example of real-world production scenarios. Both, the training environment, and the data processing method are introduced. Primarily, three aspects to achieve a higher practical orientation are addressed: A more realistic problem size compared to previous approaches, a higher customer orientation by means of an objective regarding adherence to delivery date and a control application for development and performance evaluation of the considered algorithms against known order release strategies. Follow-up research will refine the objective function, continue to scale-up the problem size and evaluate the algorithm’s scheduling results in case of changes in the system.
Digital twin and Value Stream Mapping of Warehousing in Era of Industry 4.0
Creators: name: Abdoli, Shiva
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Industry 4.0
subject: Warehouse
subject: Digital twin
subject: Value Stream Mapping
subject: Simulation
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The rapid pace of technological development and high competition make the business employ proper approaches to assess the effectiveness of their value creation process or supply chains. The dynamic business environment enhances the uncertainty and the risk of not meeting the business goals. Warehouses might be able to address some levels of uncertainty such as demand fluctuations. Yet, inventory accumulation may lead to becoming a source of inefficiency from the lean methodology perspective. Therefore, the application of the lean methodology and its well-known method, Value Stream Mapping (VSM), has not received much attention in the warehouse efficiency assessment context. On the other hand, Industry 4.0 refers to the ongoing fourth industrial revolution promoting connectivity and information sharing with some key enabling technologies, including the internet of things (IoT), simulation, and digital twin. The digital twin technology is considered a strategic technology and offers a practical way for a system performance assessment. This paper aimed to introduce an approach that integrates the VSM method with the digital twin. The proposed structured approach can be used for the performance evaluation of a warehouse while adapting to the dynamic nature of warehousing. The developed digital model can be used for real-time warehouse performance monitoring and control when connected with the physical warehouse through communication devices. The proposed approach in this paper is applied to a real case to demonstrate its applicability.
MPEC 2023-X62 : DAILY ORBIT UPDATE (2023 December 5)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Higgs Boson Mass in Low Scale Gauge Mediation Models
Creators: name: Yanagida, Tsutomu T.
name: Yokozaki, Norimi
name: Yonekura, Kazuya
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider low scale gauge mediation models with a very light gravitino m_{3/2}~16 eV, in the light of recent experimental hints on the Higgs boson mass. The light gravitino is very interesting since there is no gravitino over-production problem, but it seems difficult to explain the Higgs boson mass of ~125 GeV. This is because of the conflict between the light gravitino mass and heavy SUSY particle masses needed for producing the relatively heavy Higgs boson mass. We consider two possible extensions in this paper: a singlet extension of the Higgs sector, and strongly coupled gauge mediation. We show that there is a large parameter space, in both scenarios, where the Higgs boson mass of ~125 GeV is explained without any conflict with such a very light gravitino.
description: 23 pages, 5 figures
Analyzing Riemann's hypothesis
Creators: name: Orus-Lacort, Mercedes
name: Orus, Roman
name: Jouis, Christophe
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: In this paper we perform a detailed analysis of Riemann's hypothesis, dealing with the zeros of the analytically-extended zeta function. We use the functional equation $ζ(s) = 2^{s}π^{s-1}\sin{(\displaystyle πs/2)}Γ(1-s)ζ(1-s)$ for complex numbers $s$ such that $0<{\rm Re(s)}<1$ and the reduction to the absurd method where we use an analytical study based on a complex function and its modulus as a real function of two real variables in combination with a deep numerical analysis to show that the real part of the non-trivial zeros of the Riemann zeta function is equal to $1/2$ to the best of our resources. This is done in two steps. Firstly, we show what would happen if we assumed that the real part of $s$ has a value between $0$ and $1$ but different from $1/2$ arriving at a possible contradiction for the zeros. Secondly assuming that there is no real value $y$ such that $ζ\left(1/2 +yi \right)=0$ by applying the rules of logic to negate a quantifier and the corresponding Morgan's law we also arrive to a plausible contradiction. Finally, we analyze what conditions should be satisfied by $y \in \mathbb R$ such that $ζ(\displaystyle 1/2 +yi)=0$. While these results are valid to the best of our numerical calculations, we do not observe and foresee any tendency for a change. Our findings open the way towards assessing the validity of Riemman's hypothesis from a fresh and new mathematical perspective.
description: 17 pages, 3 figures, 1 appendix, revised version
Non-Hermitian topological states in photonic systems
Creators: name: Malzard, Simon
Publisher: name: Lancaster University
Year: 2019

description: In this thesis I explore non-Hermitian topological photonics with the aim
      of describing new phenomena which question our understanding of how far
      the current classification of topological states extends. This work
      invigorates the search for topological states in photonic systems with the
      hope of describing new mechanisms for controlling and increasing the
      number of physical systems in which robust light transport can be
      achieved. In coupled resonator optical waveguides, I demonstrate the
      formation of topological defect states in one dimensional systems and
      topological edge states in two dimensional systems, which only occur for a
      system with open boundaries. Since a non-Hermitian system displaying
      topological defect states with a trivial Hermitian limit has not been seen
      before, these results are both novel and paradigm breaking.

      Topological mode selection is another mechanism unique to controlling
      topological states in non-Hermitian photonic system. I consider a
      non-linear extension to this notion for a complex wave equation describing
      lasing elements with saturable gain. I show that beyond the categorisation
      of topological stationary-states, which continue from the underlying
      linear system, new power-oscillating topological states form. These
      power-oscillations have not yet been seen in experiments but ongoing
      collaborations aim to see these solutions in the near future.
Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale
Creators: name: Ellwanger, Ulrich
name: Hugonie, Cyril
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the NMSSM with universal Susy breaking terms (besides the Higgs sector) at the GUT scale. Within this constrained parameter space, it is not difficult to find a Higgs boson with a mass of about 125 GeV and an enhanced cross section in the diphoton channel. An additional lighter Higgs boson with reduced couplings and a mass <123 GeV is potentially observable at the LHC. The NMSSM-specific Yukawa couplings lambda and kappa are relatively large and tan(beta) is small, such that lambda, kappa and the top Yukawa coupling are of order 1 at the GUT scale. The lightest stop can be as light as 105 GeV, and the fine-tuning is modest. WMAP constraints can be satisfied by a dominantly higgsino-like LSP with substantial bino, wino and singlino admixtures and a mass of ~60-90 GeV, which would potentially be detectable by XENON100.
description: 20 pages, 14 figures
Parallel Black Oil Solvers on GPU
Creators: name: YU, SONG
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Engineering--Petroleum
subject: Reservoir Simulation
subject: GPU computing
subject: linear solver

description: Reservoir simulation for a full field heterogeneous model with millions of grid blocks demands significant computational time; therefore, improving the computational efficiency becomes crucial in designing a reservoir simulator. Graphics Processing Unit (GPU), a new high-profile parallel processor with hundreds of microprocessors, stands out in parallel simulation because of its efficient power utilization and high computational efficiency. Also, its cost is relatively low, making large-scale parallel reservoir simulation possible for most of the desktop users. In this thesis, a GPU-based parallel linear solver package, named Parallel Accelerated Simulation Solvers (PASS), is developed to speed up the reservoir simulation using the GPU. For this new solver package, several different linear solvers and preconditioners have been implemented based on GPU. For solvers, it has GMRES, BICGSTAB, ORTHOMIN etc, which are commonly used in reservoir simulators. For preconditioners, a group of ILU preconditioners are developed on GPU, including ILU(0), ILUT, block ILU(0), block ILUT. In the numerical experiments performed, the SPE10 problem, a 3D heterogeneous model with over one million grid blocks, is selected to test the speedup of the GPU solver. On the state-of-the-art CPU and GPU platform, the new GPU implementation is able to achieve a speedup of over 8 times in solving linear systems arising from this SPE10 problem compared with the single CPU based sequential solver. Moreover, the GPU solver is successfully coupled with an in-house black-oil reservoir simulator to test the performance of the whole parallel simulation process, with a speedup of around 6 times. The excellent speedup and accurate results demonstrate that the GPU-based parallel linear solver has the great potential in the parallel reservoir simulation.
Why do bubbles in Guinness sink?
Creators: name: Benilov, E. S.
name: Cummins, C. P.
name: Lee, W. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Stout beers show the counter-intuitive phenomena of sinking bubbles while the beer is settling. Previous research suggests that this phenomena is due the small size of the bubbles in these beers and the presence of a circulatory current, directed downwards near the side of the wall and upwards in the interior of the glass. The mechanism by which such a circulation is established and the conditions under which it will occur has not been clarified. In this paper, we demonstrate using simulations and experiment that the flow in a glass of stout depends on the shape of the glass. If it narrows downwards (as the traditional stout glass, the pint, does), the flow is directed downwards near the wall and upwards in the interior and sinking bubbles will be observed. If the container widens downwards, the flow is opposite to that described above and only rising bubbles will be seen.
description: 5 pages, 4 figures. The movie referred to in the text is available as an ancillary file
pyCellAnalyst: Extensive Software for Three-dimensional Analysis of Deforming Cells
Creators: name: Sibole, Scott C.
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Computer Science
subject: Engineering--Biomedical
subject: Engineering--Mechanical
subject: Microscopy
subject: Chondrocyte
subject: Image Processing
subject: Multiscale
subject: Finite Element
subject: Image Segmentation
subject: Continuum Mechanics
subject: Articular cartilage

description: Laser scanning microscopy has proven to be a transformative tool in the biomedical sciences. The technology provides a means to image three-dimensional, time-varying, micro-scale features within living tissue, which in turn has borne exciting avenues for the experimental investigation of the relationship between the hierarchical spatial scales within organisms. By coupling laser scanning microscopes to mechanical testing systems, one can study the relationships between mechanics at the organ, tissue, and cellular scales. In practice, while a controlled mechanical state is applied to intact tissue, images of the cells within can be obtained via microscopy; however, extracting the geometric information from these images and characterizing deformation has been a challenge to the field. pyCellAnalyst is an extensive software framework for such analysis of these image data. It provides an accessible interface to reconstruct cellular geometries from images, characterize deformation, and perform finite element analyses informed by the experimental observations.
Supersymmetric algebra of the massive supermembrane
Creators: name: del Moral, M. P. Garcia
name: Leon, P.
name: Restuccia, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we obtain the explicit expression of the supersymmetric algebra associated with the recently proposed massive supermembrane including all surface terms. We formulate the theory as the limit of a supermembrane on a genus-two compact Riemann surface when one of the handles becomes a string attached to a torus. The formulation reduces to a supermembrane on a punctured torus with a "string spike" (in the sense of \cite{dwln}), attached to it. In this limit, we identify all surface terms of the algebra and give the explicit expression of the Hamiltonian in agreement with the previous formulation of it. The symmetry under area preserving diffeomorphisms, connected and nonconnected to the identity, is also discussed. Only parabolic $Sl(2,\mathbb{Z})$ discrete symmetries are preserved.
description: 10 pages, 4 figures
Addiction as an Excuse
Creators: name: Mills-Smith, Brayden
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: addiction
subject: Excuse
subject: Blame
subject: Blameworthiness
subject: Moral Responsibility
subject: Quality of Will

description: This project is concerned with figuring out under what conditions addiction serves as an excuse from blame. The first chapter argues that addicts have diminished control over their drug use. Chapter 2 develops the ethical framework that I will use to approach the question. Chapter 3 argues that addiction does not undermine moral responsibility. The upshot of this is that if addiction is excusing, it is not because addicts are the kinds of people who cannot serve as subjects for blame. Chapter 4 offers and defends a different account of addiction as an excuse, which holds that addiction is excusing for people with a certain kind of character and a certain kind of history. It also illustrates the practical application of my account and points to an important outstanding problem for future research.