cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generation of Squeezing in Higher Order Hermite-Gaussian Modes with an Optical Parametric Amplifier
Creators: name: Lassen, Mikael
name: Delaubert, Vincent
name: Harb, Charles C.
name: Treps, Nicolas
name: Lam, Ping Koy
name: Bachor, Hans A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate quantum correlations in the transverse plane of continuous wave light beams by producing -4.0 dB, -2.6 dB and -1.5 dB of squeezing in the TEM00, TEM10 and TEM20 Hermite- Gauss modes with an optical parametric amplifier, respectively. This has potential applications in quantum information networking, enabling parallel quantum information processing. We describe the setup for the generation of squeezing and analyze the effects of various experimental issues such as mode overlap between pump and seed and nonlinear losses.
description: 7 pages, 4 figures
MPEC 2024-T164 : 2024 TY3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TY3

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.
Special polynomials associated with the K2 hierarchy
Creators: name: Kudryashov, Nikolai A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: New special polynomials associated with the rational solutions of analogue to the Painleve hierarchies are introduced. The Hirota relations for these special polynomials are found. Differential - difference hierarchies for finding special polynomials are presented. These formulae allow us to search the special polynomials associated with the hierarchy studied. The ordinary differential hierarchy for the Yablonskii - Vorob'ev polynomials is given.
description: 24 pages, 5 figures
Generalized spheroidal wave equation and limiting cases
Creators: name: Figueiredo, B. D. Bonorino
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We find sets of solutions to the generalized spheroidal wave equation (GSWE) or, equivalently, to the confluent Heun equation. Each set is constituted by three solutions, one given by a series of ascending powers of the independent variable, and the others by series of regular and irregular confluent hypergeometric functions. For a fixed set, the solutions converge over different regions of the complex plane but present series coefficients proportional to each other. These solutions for the GSWE afford solutions to a double-confluent Heun equation by a taking-limit process due to Leaver. Another procedure, called Whittaker-Ince limit, provides solutions in series of powers and Bessel functions for two other equations with a different type of singularity at infinity. In addition, new solutions are obtained for the Whittaker-Hill and Mathieu equations by considering these as special cases of both the confluent and double-confluent Heun equations. In particular, we find that each of the Lindmann-Stieltjes solutions for the Mathieu equation is associated with two expansions in series of Bessel functions. We also discuss a set of solutions in series of hypergeometric and confluent hypergeometric functions for the GSWE and use their Leaver limits to obtain infinite-series solutions for the Schrödinger equation with an asymmetric double-Morse potential. Finally, the possibility of extending the solutions of the GSWE to the general Heun equation is briefly discussed.
description: Submitted to Journal of Mathematical Physics
Data-Driven Control of the COVID-19 Outbreak via Non-Pharmaceutical Interventions: A Geometric Programming Approach
Creators: name: Hayhoe, Mikhail
name: Barreras, Francisco
name: Preciado, Victor M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper we propose a data-driven model for the spread of SARS-CoV-2 and use it to design optimal control strategies of human-mobility restrictions that both curb the epidemic and minimize the economic costs associated with implementing non-pharmaceutical interventions. We develop an extension of the SEIR epidemic model that captures the effects of changes in human mobility on the spread of the disease. The parameters of our data-driven model are learned using a multitask learning approach that leverages both data on the number of deaths across a set of regions, and cellphone data on individuals' mobility patterns specific to each region. We propose an optimal control problem on this data-driven model with a tractable solution provided by geometric programming. The result of this framework is a mobility-based intervention strategy that curbs the spread of the epidemic while obeying a budget on the economic cost incurred. Furthermore, in the absence of a straightforward mapping from human mobility data to economic costs, we propose a practical method by which a budget on economic losses incurred may be chosen to eliminate excess deaths due to over-utilization of hospital resources. Our results are demonstrated with numerical simulations using real data from the Philadelphia metropolitan area.
description: 16 pages, 5 figures
Basic Types of Coarse-Graining
Creators: name: Gorban, A. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We consider two basic types of coarse-graining: the Ehrenfests' coarse-graining and its extension to a general principle of non-equilibrium thermodynamics, and the coarse-graining based on uncertainty of dynamical models and Epsilon-motions (orbits). Non-technical discussion of basic notions and main coarse-graining theorems are presented: the theorem about entropy overproduction for the Ehrenfests' coarse-graining and its generalizations, both for conservative and for dissipative systems, and the theorems about stable properties and the Smale order for Epsilon-motions of general dynamical systems including structurally unstable systems. Computational kinetic models of macroscopic dynamics are considered. We construct a theoretical basis for these kinetic models using generalizations of the Ehrenfests' coarse-graining. General theory of reversible regularization and filtering semigroups in kinetics is presented, both for linear and non-linear filters. We obtain explicit expressions and entropic stability conditions for filtered equations. A brief discussion of coarse-graining by rounding and by small noise is also presented.
description: 60 pgs, 11 figs., includes new analysis of coarse-graining by filtering. A talk given at the research workshop: "Model Reduction and Coarse-Graining Approaches for Multiscale Phenomena," University of Leicester, UK, August 24-26, 2005
ความหลากหลายของสมุนไพรและการใช้ประโยชน์ในพื้นที่เขาพระ อำเภอเดิมบางนางบวช จังหวัดสุพรรณบุรี
Creators: name: สุรชาติ สินวรณ์
name: ณัฐบดี วิริยาวัฒน์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: ความหลากหลาย,พันธุกรรมพืชสมุนไพร,ภูมิปัญญาท้องถิ่น,จังหวัดสุพรรณบุรี

description: 1, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Understanding Flare Statistics of Young Stars with TESS and Machine Learning
Creators: name: Feinstein, Adina
name: Montet, Benjamin
name: Ansdell, Megan
name: Nord, Brian
name: Bean, Jacob
name: Günther, Maximillian
name: Gully-Santiago, Michael
name: Schlieder, Joshua
Publisher: name: Zenodo
Year: 2021
Subjects: young stars
cool stars 20.5

description: The evolution of young stellar magnetic fields is not well understood. By studying observable proxies, such as stellar flares and starspots, we can begin to better understand such mechanisms. All-sky photometric time-series missions have allowed for the monitoring of thousands of young stars to understand the evolution of stellar activity. We have developed a convolutional neural network, stella, specifically trained to find flares in TESS short-cadence data. We applied the network to 3200 young stars to evaluate flare rates as a function of age and spectral type. We also measured rotation periods for 1500 of our targets and found that flares of all amplitudes are present across all spot phases, suggesting high spot coverage across the entire surface. Additionally, flare rates and amplitudes decrease for stars older than 50 Myr across all temperatures hotter than 4000 K, while cooler stars show no evolution across 800 Myr. Cooler stars also show higher flare rates and amplitudes across all ages, particularly those that are fully convective.
ฤทธิ์ทางชีวภาพในการยับยั้งการเจริญเติบโตของเชื้อแบคทีเรียของสารสกัดพืชสมุนไพรที่พบในภาคตะวันออกเฉียงเหนือตอนบนของประเทศไทย
Creators: name: สมฤดี ศรีทับทิม
name: สุมลรัตน์ กระพี้แดง
name: นิคม วงศา
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: พืชสมุนไพร,สารสกัดหยาบ,ฤทธิ์ทางชีวภาพ,แบคทีเรีย

description: 1, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Coronal heating by MHD waves
Creators: name: Van Doorsselaere, Tom
name: Srivastava, Abhishek K.
name: Antolin, Patrick
name: Magyar, Norbert
name: Farahani, Soheil Vasheghani
name: Tian, Hui
name: Kolotkov, Dmitrii Y.
name: Ofman, Leon
name: Guo, Mingzhe
name: Arregui, Iñigo
name: De Moortel, Ineke
name: Pascoe, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The heating of the solar chromosphere and corona to the observed high temperatures, imply the presence of ongoing heating that balances the strong radiative and thermal conduction losses expected in the solar atmosphere. It has been theorized for decades that the required heating mechanisms of the chromospheric and coronal parts of the active regions, quiet-Sun, and coronal holes are associated with the solar magnetic fields. However, the exact physical process that transport and dissipate the magnetic energy which ultimately leads to the solar plasma heating are not yet fully understood. The current understanding of coronal heating relies on two main mechanism: reconnection and MHD waves that may have various degrees of importance in different coronal regions. In this review we focus on recent advances in our understanding of MHD wave heating mechanisms. First, we focus on giving an overview of observational results, where we show that different wave modes have been discovered in the corona in the last decade, many of which are associated with a significant energy flux, either generated in situ or pumped from the lower solar atmosphere. Afterwards, we summarise the recent findings of numerical modelling of waves, motivated by the observational results. Despite the advances, only 3D MHD models with Alfvén wave heating in an unstructured corona can explain the observed coronal temperatures compatible with the quiet Sun, while 3D MHD wave heating models including cross-field density structuring are not yet able to account for the heating of coronal loops in active regions to their observed temperature.
description: accepted in Space Science Reviews
MPEC 2024-T165 : 2024 TZ3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TZ3

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.
Study 3 - effects of changes on smoothness
Creators: name: Chenwei Zhu
name: Simons, Daniel J.
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This study examines whether the presence of a change (detected or missed) affects smoothness ratings. In study 2, people rated the video with 15 ommitted frames as less smooth. That could have been due to the presence of a change in the scene. In study 3, we randomly assign participants to a video version with a change to the actors appearance or without one. All participants view one of two actions: pickup and baseball. And, in all cases, the video omits 15 frames during a cut. We will compare smoothness ratings for participants in the change present and change absent groups. We also will compare smoothness ratings for those who did and didn't notice a change (in the change present condition). Finally, we will compare those who missed the change in the change present group to those in the change absent group.
Novel method distinguishing between competing topological orders
Creators: name: Dutta, Bivas
name: Yang, Wenmin
name: Melcer, Ron Aharon
name: Kundu, Hemanta Kumar
name: Heiblum, Moty
name: Umansky, Vladimir
name: Oreg, Yuval
name: Stern, Ady
name: Mross, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Hall states - the progenitors of the growing family of topological insulators -- are rich source of exotic quantum phases. The nature of these states is reflected in the gapless edge modes, which in turn can be classified as integer - carrying electrons, fractional - carrying fractional charges; and neutral - carrying excitations with zero net charge but a well-defined amount of heat. The latter two may obey anyonic statistics, which can be abelian or non-abelian. The most-studied putative non-abelian state is the spin-polarized filling factor ν=5/2, whose charge e/4 quasiparticles are accompanied by neutral modes. This filling, however, permits different possible topological orders, which can be abelian or non-abelian. While numerical calculations favor the non-abelian anti-Pfaffian (A-Pf) order to have the lowest energy, recent thermal conductance measurements suggested the experimentally realized order to be the particle-hole Pfaffian (PH-Pf) order. It has been suggested that lack of thermal equilibration among the different edge modes of the A-Pf order can account for this discrepancy. The identification of the topological order is crucial for the interpretation of braiding (interference) operations, better understanding of the thermal equilibration process, and the reliability of the numerical studies. We developed a new method that helps identifying the topological order of the ν=5/2 state. By creating an interface between the two 2D half-planes, one hosting the ν=5/2 state and the other an integer ν=3 state, the interface supported a fractional ν=1/2 charge mode with 1/2 quantum conductance and a neutral Majorana mode. The presence of the Majorana mode, probed by measuring noise, propagating in the opposite direction to the charge mode, asserted the presence of the PH-Pf order but not that of the A-Pf order.
description: 36 pages, 4 main figures, supplementary data
Theoretical Evidence for the Berry-Phase Mechanism of Anomalous Hall Transport: First-principles Studies on CuCr$_2$Se$_{4-x}$Br$_x$
Creators: name: Yao, Yugui
name: Liang, Yongcheng
name: Xiao, Di
name: Niu, Qian
name: Shen, Shun-Qing
name: Dai, X.
name: Fang, Zhong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To justify the origin of anomalous Hall effect (AHE), it is highly desirable to have the system parameters tuned continuously. By quantitative calculations, we show that the doping dependent sign reversal in CuCr$_{2}$Se$_{4-x}$Br$_{x}$, observed but not understood, is nothing but direct evidence for the Berry-Phase mechanism of AHE. The systematic calculations well explain the experiment data for the whole doping range where the impurity scattering rates is changed by several orders with Br substitution. Further sign change is also predicted, which may be tested by future experiments.
description: 4 pages
Code, data and figures for the paper "Comparing two methods to analyze the factors affecting the invasion dynamics of new pathogenic strains using temporal observation data : the example of pertussis strains in the United States"
Creators: name: Anonymous
Publisher: name: Zenodo
Year: 2024

description: All codes, data and figures used to produce the results presented in the manuscript entitled "Comparing two methods to analyze the factors affecting the invasion dynamics of new pathogenic strains using temporal observation data : the example of pertussis strains in the United States" submitted to Methods in Ecology and Evolution for peer reviewing.
Integrability and Chaotic Behavior in Mechanical Billiard Systems
Creators: name: Takeuchi, Airi
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2022
Subjects: mechanical billiard systems
Kepler problem
Hooke problem
Euler's two-center problem
Lagrange problem
integrability
ergodicity

description: This thesis is devoted to the study of mathematical billiards in the presence of non-constant potentials and their integrability and chaotic behavior. Classical examples of integrable billiards are free billiards in circles and ellipses. In the presence of specific potentials (such as Kepler potential and harmonic (Hooke) potential), there are various known integrable billiard systems. These integrable examples have been found independently in different contexts. In Chapter 2, we illustrate how some of these integrable billiard systems are related to each other by conformal transformations. As an application, we obtain infinitely many billiard systems defined in central force problems which are integrable on a particular energy level. We then explain that the classical Hooke-Kepler correspondence extends to the correspondence between integrable Hooke and Kepler billiards. As a result, we show that any focused conic sections give rise to integrable Kepler billiards which give new examples of integrable Kepler billiards. The conformal transformation technique is applied to Stark-type problems and Euler's two-center problem and provides new examples of integrable mechanical billiards. In Chapter 3 we show that integrable Kepler and Hooke billiard systems on the plane have the corresponding integrable billiard systems on surfaces of constant curvatures. We also establish the integrability of a class of billiard systems defined in the Lagrangian problem, which is the superposition of two Kepler problems and a Hooke problem, on the sphere, in the plane, and in the hyperbolic plane. These results are obtained by the method of projective dynamics and projective billiards. A toy model of billiard systems with a central force problem in the plane and with a line as the reflection wall was proposed by L. Boltzmann to illustrate his ergodic hypothesis. Later, it has been found that not all such systems are ergodic, and it becomes a question whether some of such systems are ergodic. In Chapter 4, we compute the billiard mappings of Boltzmann's billiard systems, and we present some numerical studies on their chaotic behavior and ergodicity. We found some numerical evidence suggesting that some of these systems might be ergodic.
Willingness to Pay for Nature Conservation Policies in State-Owned Forests: An Austrian Case Study
Creators: name: Getzner, Michael
name: Meyerhoff, Jürgen
name: Schläpfer, Felix
Publisher: name: Technische Universität Berlin
Year: 2018
Subjects: subject: 333 Boden- und Energiewirtschaft
subject: 634 Obstanlagen, Früchte, Forstwirtschaft
subject: state-owned forests
subject: Austria
subject: commercial forestry
subject: nature conservation
subject: willingness-to-accept/willingness to pay
subject: scenario design

description: The Austrian Federal Forests (ÖBf), the Republic of Austria’s state-owned company, manages 15% of the Austrian forests; about 50% of the land is devoted to nature conservation. This paper presents the results of a representative survey of Austrian households ascertaining the acceptance of, preferences regarding, and willingness to pay for three different management scenarios. One program would increase commercial forestry, while two other programs would significantly enhance biodiversity conservation. The majority of respondents considers it an important task of state-owned forests to enhance biodiversity conservation. The study reveals that the preferences of the respondents are very heterogeneous. For instance, in addition to socio-economic characteristics, the willingness to pay for nature conservation depends on personal experiences and perceptions (e.g., whether respondents feel anxious in forests), political views (e.g., the acceptance of strict legal protection of natural resources), and opinions on forest policy issues (e.g., preferences regarding privatization of public land). The study places special emphasis on the thorough description and presentation of the scenarios to the respondents and is one of the first European studies to elicit opinions on forest policies regarding public land in an environmental valuation framework.
Development of an injection system for a compact H- cyclotron, the concomitant measurement of injected beam properties and the experimental characterization of the spiral inflector
Creators: name: Dehnel, Morgan Patrick
Publisher: name: University of British Columbia
Year: 2009

description: This thesis addresses two major problems. One is of interest to commercial cyclotron manufacturers and the other is of interest to the accelerator physics community. The industrial problem was to produce a compact and modular ion source and injection system for the new TR13 H~ cyclotron, which is capable of transporting and injecting a high quality and well matched beam into the cyclotron. The accelerator physics problem was to advance the science of inflector ion optical design, analysis and troubleshooting from the realm of pure simulation to the realm of measurement and experimentation. The industrial problem was solved by designing candidate injection systems in parallel with the TR13 cyclotron design. These systems were fabricated and then experimentally optimized along with the ion source on a 1 MeV test cyclotron. This work resulted in a set of ion source and injection systems with well documented and understood properties. The recommended solution for the TR13 was a cost effective injection system composed of only two axially rotated quadrupole magnets. The accelerator physics problem is the lack of measured cyclotron inflector optical data and beam related properties in the immediate vicinity of a cyclotron inflector. This required the development of an experimental technique to overcome the numerous technical difficulties associated with making measurements near a device as inaccessible as a cyclotron inflector. A diverse assembly of equipment and procedures was required: a well understood injection system, a pinhole collimator for producing beamlets for ray-tracing, a specially configured center region to expose the inflector to view, a system of scintillators in close proximity to the inflector for producing visible beamspots, a TV camera and frame grabber to record images and a set of image analysis and data processing procedures. The results obtained using this technique were: (a) measured constraints on the coefficients of an inflector's transport matrix, (b) measurement of the beam's centering, size, shape and orientation in phase space at the entrance and exit of an inflector, (c) measurements of beam displacement as a function of field and energy perturbations at an inflector exit and (d) comparison of an inflector simulation code's capabilities against detailed measured data. Such properties of a beam have not heretofore been determined experimentally.
Ενοποίηση των Μεθοδολογιών του Επιχειρηματικού Σχεδίου, του Στρατηγικού Σχεδιασμού της Ολικής Ποιότητας και της Δραστικής Αναδιάρθρωσης
Creators: name: Τσιαλκατούρα, Νίκη Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Επιχειρηματικό Σχέδιο
Στρατηγικός Σχεδιασμός
Ολική Ποιότητα
Business Plan
Strategic Planning
Total Quality Management

description: Το επιχειρηματικό σχέδιο, ο στρατηγικός σχεδιασμός, η διαχείριση ολικής ποιότητας και η δραστική αναδιάρθρωση χρησιμοποιούνται χρόνια τώρα από τους οργανισμούς ώστε να αυξήσουν τα κέρδη τους. Πλήθος μελετών έχει διεξαχθεί για την βελτίωση αυτών των μεθόδων. Μέχρι σήμερα η φιλοσοφία κάθε μεθοδολογίας έχει ακολουθήσει συγκεκριμένη εξέλιξη και έχει καθιερωθεί ένας συγκεκριμένος τρόπος εφαρμογής. Αν και αντιμετωπίζονται μεμονωμένα, όλες οι μεθοδολογίες έχουν κοινά στοιχεία τα οποία μπορούν να χρησιμοποιηθούν ώστε να μεγιστοποιηθεί το όφελος των οργανισμών. Η παρούσα διπλωματική εργασία έχει σκοπό να αναδείξει όλες τις πιθανές αλληλοεπιδράσεις και τα κοινά σημεία μεταξύ των παραπάνω μεθόδων. Αρχικά γίνεται σύγκριση των μεθόδων, καθορίζονται οι ομοιότητες, οι διαφορές και οι αλληλεπιδράσεις των εφαρμογών. Έτσι προκύπτει η ανάγκη δημιουργίας μιας ενοποιημένης μεθοδολογίας: στα πλαίσια της διπλωματικής εργασίας έχει γίνει μια απόπειρα για την δημιουργία μιας ενοποιημένης μεθοδολογίας για υπάρχουσες και νέες επιχειρήσεις. Η παραπάνω μεθοδολογία εφαρμόστηκε σε δύο μελέτες περιπτώσεων εφαρμογής για υποθετικές νέες επιχειρήσεις. Αν και η αξία της μεθοδολογίας έχει αναδειχθεί πιστεύεται ότι η εφαρμογή της σε αληθινό οικονομικό περιβάλλον και ο έλεγχος του αντίστοιχου οργανισμού για συγκεκριμένη χρονική περίοδο είναι απαραίτητη για την πλήρη επιβεβαίωση της.
description: Business Plan, Strategic Planning, Total Quality Management and Reengineering have been used for years by organizations in order to improve management and to produce greater profit. Many studies have been conducted towards improving these methods. So far, each method has followed its own evolution and a specific way of implementation has been introduced to each one of them. Despite the fact that these methods are being studied separately, there are common elements that can be used to maximize organization’s profits. This study aims to identify all possible interactions and common elements between the above methods. Firstly, a comparison of these methods has been conducted, defining similarities, differences and interactions of applications. Thereby, it becomes clear that there is a need for a combined planning methodology; an attempt is made in this thesis to create a combined methodology for existing companies and startups. The above methodology has been implemented in two case studies for hypothetical startups. Although, the value of the methodology became clear, it is believed that it is application to a real world environment and the monitoring of the relevant organization for a certain period of time is necessary for a complete validation.
Yang-Mills equation for stable Higgs sheaves
Creators: name: Biswas, Indranil
name: Schumacher, Georg
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C07; 32L05

description: We establish a Kobayashi-Hitchin correspondence for the stable Higgs sheaves on a compact Kaehler manifold. Using it, we also obtain a Kobayashi-Hitchin correspondence for the stable Higgs G-sheaves, where G is any complex reductive linear algebraic group.
Nanoscale Smoothing and the Analysis of Interfacial Charge and Dipolar Densities
Creators: name: Junquera, Javier
name: Cohen, Morrel H.
name: Rabe, Karin M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interface properties of interest in multilayers include interfacial charge densities, dipole densities, band offsets, and screening-lengths, among others. Most such properties are inaccesible to direct measurements, but are key to understanding the physics of the multilayers. They are contained within first-principles electronic structure computations but are buried within the vast amount of quantitative information those computations generate. Thus far, they have been extracted from the numerical data by heuristic nanosmoothing procedures which do not necessarily provide results independent of the smoothing process. In the present paper we develop the theory of nanosmoothing, establishing procedures for both unpolarized and polarized systems which yield interfacial charge and dipole densities and band offsets invariant to the details of the smoothing procedures when the criteria we have established are met. We show also that dipolar charge densities, i. e. the densities of charge transferred across the interface, and screening lengths are not invariant. We illustrate our procedure with a toy model in which real, transversely averaged charge densities are replaced by sums of Gaussians.
description: 30 pages, 15 figures, 4 tables
On Hamilton's Characteristic Functions for Reflection
Creators: name: Guilfoyle, Brendan
name: Klingenberg, Wilhelm
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 51M30, 78A05

description: We review the complex differential geometry of the space of oriented affine lines in ${\Bbb{R}}^3$ and give a description of Hamilton's characteristic functions for reflection in an oriented C$^1$ surface in terms of this geometry.
description: 10 pages AMS-LATEX, 3 figures
Generating the primordial curvature perturbations in preheating
Creators: name: Suyama, Teruaki
name: Yokoyama, Shuichiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the primordial curvature perturbations may originate not from the quantum fluctuations of inflaton during inflation but from isocurvature perturbations which are amplified during preheating after inflation. We consider a simple preheating model, whose potential is given by $V(ϕ, χ)={1/4}λϕ^4+{1/2}g^2 ϕ^2 χ^2$ with $g^2/λ=2$, as a possible realization of generating curvature perturbations during preheating. We make use of the $δN$ formalism which requires only knowledge of the homogeneous background solutions in order to evaluate the evolution of curvature perturbations on super-horizon scales. We solve the background equations numerically and find that the amplitude and the spectral index of curvature perturbations originating from preheating can be tuned to the observed values if the isocurvature perturbations at the end of inflation is not suppressed on super-horizon scales. We also point out that the tensor to scalar ratio in ${1/4}λϕ^4$ inflation model can be significantly lowered, hence letting the ${1/4}λϕ^4$ model, which is ruled out by the Wilkinson Microwave Anisotropy Probe (WMAP) data combined with SDSS data, get back into the observationally allowed region.
description: 11 pages, 6 figures, Typos corrected, references added
CDP: a Content Discovery Protocol for Mobile P2P Systems
Creators: name: Yeferny, Taoufik
name: Hamad, Sofian
name: Belhaj, Salem
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The emergence of affordable wireless and mobile devices was a key step towards deploying mobile peer-to-peer (P2P) systems. The latter allow users to share and search diverse multimedia resources over Mobile Ad-hoc Networks (MANETs). Due to the nature of MANETs, P2P mobile systems brought up many new thriving challenges, in particular with regard to the content discovery issue. Thus, the design of an efficient content discovery protocol has been of paramount importance. The thriving challenge is to (i) locate relevant peers sharing pertinent resources for users queries and then (ii) to ensure that those peers would be reached by considering different MANET constraints (e.g., peer mobility, battery energy, peer load, to cite a few). Even though the literature witnesses a wealthy number of content discovery protocols, only few of them have considered the above-mentioned requirements. To overcome this shortage, we introduce in this paper an efficient Content Discovery Protocol (CDP) for P2P mobile systems. The idea underlying our proposal is to route users queries to relevant peers that are (1) more suitable to answer the user query according to its content, (2) more stable to relay query hits, (3) less loaded to avoid the network congestion issue and (4) having more battery lifetime to avoid the network partitioning issue. The performed experiments show that CDP outperforms its competitor in terms of effectiveness and efficiency.
Cybersecurity Knowledge and Skills Taught in Capture the Flag Challenges
Creators: name: Švábenský, Valdemar
name: Čeleda, Pavel
name: Vykopal, Jan
name: Brišáková, Silvia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Capture the Flag challenges are a popular form of cybersecurity education, where students solve hands-on tasks in an informal, game-like setting. The tasks feature diverse assignments, such as exploiting websites, cracking passwords, and breaching unsecured networks. However, it is unclear how the skills practiced by these challenges match formal cybersecurity curricula defined by security experts. We explain the significance of Capture the Flag challenges in cybersecurity training and analyze their 15,963 textual solutions collected since 2012. Based on keywords in the solutions, we map them to well-established ACM/IEEE curricular guidelines to understand which skills the challenges teach. We study the distribution of cybersecurity topics, their variance in different challenge formats, and their development over the past years. The analysis showed the prominence of technical knowledge about cryptography and network security, but human aspects, such as social engineering and cybersecurity awareness, are neglected. We discuss the implications of these results and relate them to contemporary literature. Our results indicate that future Capture the Flag challenges should include non-technical aspects to address the current advanced cyber threats and attract a broader audience to cybersecurity.
description: Published in Elsevier Computers & Security, see https://www.sciencedirect.com/science/article/pii/S0167404820304272 (first available online on December 27, 2020). The article has 32 pages (in the preprint template), 9 figures, and 4 tables
Gaussian Decoherence and Gaussian Echo from Spin Environments
Creators: name: Zurek, W. H.
name: Cucchietti, F. M.
name: Paz, J. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We examine an exactly solvable model of decoherence -- a spin-system interacting with a collection of environment spins. We show that in this simple model (introduced some time ago to illustrate environment--induced superselection) generic assumptions about the coupling strengths lead to a universal (Gaussian) suppression of coherence between pointer states. We explore the regime of validity of this result and discuss its relation to spectral features of the environment. We also consider its relevance to the experiments on the so-called Loschmidt echo (which measures, in effect, the fidelity between the initial and time-reversed or "echo" signal). In particular, we show that for partial reversals (e.g., when of only a part of the total Hamiltonian changes sign) fidelity will exhibit a Gaussian dependence on the time of reversal. In such cases echo may become independent of the details of the reversal procedure or the specifics of the coupling to the environment. This puzzling behavior was observed in several NMR experiments. Natural candidates for such two environments (one of which is easily reversed, while the other is ``irreversible'') are suggested for the experiment involving ferrocene.
description: Improved text and figures, to appear in the special issue of Acta Physica Polonica B celebrating the 100th anniversary of Smoluchowski's equation and his paper explaining Brownian motion (in http://th-www.if.uj.edu.pl/acta/vol38/pdf/v38p1685.pdf)
Efectul diferențelor culturale asupra corporațiilor și echipelor internaționale
Creators: name: Agavriloaei, Sabina Maria
Publisher: name: Zenodo
Year: 2024

description: Diferențele culturale sunt o barieră de care mulți cetățeni internaționali se lovesc în drumul lor spre atingerea unui trai mai bun. Acestea sunt întâlnite la orice pas, dar își pun amprenta cel mai semnificativ în cadrul echipelor internaționale. Multe companii își structurează echipele în jurul persoanelor internaționale, beneficiind de avantaje precum o imagine pozitivă a firmei sau un mediu de lucru complex din punct de vedere al angajaților, fapt ce le oferă un atuu în fața concurenței.
The Nekobune Difference Conjecture: A New Perspective on k-Tuple Primes
Creators: name: Okawa, Kohei
Publisher: name: Zenodo
Year: 2025

description: ※There are separate versions for public viewing and Twitter viewing. Twitter version: https://zenodo.org/records/15126871

NOTE (Correction)  In the initial analysis of Pattern 1 ({0,6,8,14,18}), the following errors were identified:  - **Sum of Δp_k**: 88,770 (previously miscalculated as 91,930)  - **Average **: 5,918.0 - **Error rate vs theory**: 5.31% (was 1.94%)  

The conclusions remain qualitatively unchanged, but readers should refer to these corrected values.  A full revised version will follow.
Manual de Gestão Estratégica das Organizações
Creators: name: Justino, Maria do Rosário
Publisher: name: Zenodo
Year: 2014

description: O objetivo deste manual é abordar, de forma simples e interessante, os temas que serão lecionados na unidade curricular de Gestão Estratégica das Organizações. O principal objetivo é propor um manual de estudo acerca da Gestão Estratégica e o seu foco são essencialmente os estudantes.

Neste manual, em primeiro lugar, fez-se o esforço intelectual de recompilar e dar forma aos conteúdos teóricos, que foram moldando o corpo de conhecimentos que na atualidade se integram na gestão das organizações e, em segundo lugar, a visão derivada da experiencia docente no que respeita à metodologia para a formação dos alunos universitários neste campo.

As mudanças que têm acontecido na envolvente empresarial durante os últimos anos levaram as empresas a procurar soluções para garantir a sua sobrevivência e crescimento, respondendo às novas exigências no mercado.

Competitividade, globalização da economia, vantagens competitivas, melhoria da qualidade, redução de custos, cultura empresarial…Todos estes e muitos mais são termos que habitualmente escutamos dos gestores, políticos, jornalistas, etc, quando se referem ou discutem sobre o mundo empresarial atual.

As empresas movem-se hoje em dia num contexto extremamente difícil, em que cada vez há mais e valiosos competidores. A concorrência entre as empresas é cada vez mais aberta e mais difícil. A envolvente está em constante mudança, as fronteiras económicas entre os países vão desaparecendo. Deste modo, esta sebenta converte-se num manual de trabalho, em conjunto com casos práticos e atuais analisados em sala de aula, formando assim o corpo teórico.
Co-production Performance Information, Expectations, and Citizen Satisfaction
Creators: name: qin, zengqiang
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: In recent years, research of citizen satisfaction has increasingly relied on the expectancy–disconfirmation model (EDM), which emphasizes the role that expectations play in shaping citizens’ evaluations of public services; however, little attention has been paid to distinguishing between different expectations and their sources. This study investigates how public participation in digital services affects citizens’ normative expectations of what performance should be and predictive expectations of what performance will be by combining research school of coproduction and citizen satisfaction.
The Nekobune Difference Conjecture: A New Perspective on k-Tuple Primes
Creators: name: Okawa, Kohei
Publisher: name: Zenodo
Year: 2025

description: ※There are separate versions for public viewing and Twitter viewing. Twitter version: https://zenodo.org/records/15126871

NOTE (Correction)  In the initial analysis of Pattern 1 ({0,6,8,14,18}), the following errors were identified:  - **Sum of Δp_k**: 88,770 (previously miscalculated as 91,930)  - **Average **: 5,918.0 - **Error rate vs theory**: 5.31% (was 1.94%)  

*All mistakes have been fixed

The conclusions remain qualitatively unchanged, but readers should refer to these corrected values.  A full revised version will follow.
Manual de Gestão Estratégica e Inovação
Creators: name: Justino, Maria do Rosário
Publisher: name: Zenodo
Year: 2022

description: O objetivo deste manual é abordar, de forma simples e interessante, os temas que serão lecionados na unidade curricular de Gestão Estratégica e Inovação. O principal objetivo é propor um manual de estudo acerca da Gestão Estratégica e o seu foco são essencialmente os estudantes.

Neste manual, em primeiro lugar, fez-se o esforço intelectual de recompilar e dar forma aos conteúdos teóricos, que foram moldando o corpo de conhecimentos que na atualidade se integram na gestão das organizações e, em segundo lugar, a visão derivada da experiencia docente no que respeita à metodologia para a formação dos alunos universitários neste campo.

As mudanças que têm acontecido na envolvente empresarial durante os últimos anos levaram as empresas a procurar soluções para garantir a sua sobrevivência e crescimento, respondendo às novas exigências no mercado.

Competitividade, globalização da economia, vantagens competitivas, melhoria da qualidade, redução de custos, cultura empresarial…Todos estes e muitos mais são termos que habitualmente escutamos dos gestores, políticos, jornalistas, etc, quando se referem ou discutem sobre o mundo empresarial atual.

As empresas movem-se hoje em dia num contexto extremamente difícil, em que cada vez há mais e valiosos competidores. A concorrência entre as empresas é cada vez mais aberta e mais difícil. A envolvente está em constante mudança, as fronteiras económicas entre os países vão desaparecendo. Deste modo, esta sebenta converte-se num manual de trabalho, em conjunto com casos práticos e atuais analisados em sala de aula, formando assim o corpo teórico.
Metacommunity Dynamics in Consumer Resource Models
Creators: name: Debesai, Serena
Publisher: name: Stanford Digital Repository
Year: 2024
Subjects: metacommunities, ecology

description: Microbial communities are critical to sustaining a wide variety of ecosystems, including the gut microbiome. The composition and diversity of gut microbiota at different taxonomic levels have been linked to different health outcomes. Individual gut microbiota are typically colonized by a few strains of a given species, despite extensive strain level diversity in the larger metapopulation. At a theoretical level, it is not well understood how and why the difference in diversity at these different scales emerges. In this project, we study how biodiversity arises in a simple toy model of a metacommunity called a consumer resource model. We present the full migration-diversification-drift-balance equation, governing the distribution of strain frequencies in a single deme in the metapopulation. We demonstrate through analytical calculations and simulations that in the weak migration limit, strains are subject to competitive exclusion at the metapopulation level. Finally, we show that introducing environmental heterogeneity between demes can rescue coexistence at the metapopulation level.
title: Koennen Kontinente untertauchen? Kontinentkollision und -subduktion – Tektonik, Tiefenstruktur und geodynamische Prozesse unter dem Pamir, Tien Shan und Hindukusch
Creators: name: Schurr, Bernd
name: Mechie, James
name: Yuan, Xiaohui
name: Schneider, Felix M.
name: Sippl, Christian
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2013

description: The Pamir and Hindu Kush seismic zones, at the northwest corner of the India-Asia collision zone, are unique in that they are the only seismic zones in the heart of a continent with deep earthquakes at 90 to 250 km depth. Since 2008, the GFZ has operated several temporary seismological networks in the central Asian region in Tajikistan, Kyrgyzstan and most recently Afghanistan, together with local partners. The aims of these experiments have been to try to understand these deep seismic zones and to elucidate the crustal and mantle structure beneath the region. To date, the analysis of the seismological data shows that under the Pamir, the cold Asian mantle lithosphere descends (subducts), together with the lower crust and a part of the overlying middle crust, in a strongly curved, cone-shaped arc. At about 90 to 100 km depth, the middle crust detaches from the lower crust, pools and subsequently either stays there or rises back towards the surface due to its buoyancy. Only the lower crust descends completely to greater depths. Mineral reactions within the lower crust are most probably responsible for the deep earthquakes. Thus, in answer to the question posed by the title, only the lower continental crust seems able to descend (subduct), together with the continental lithospheric mantle, back deep into the Earth. The bulk of the crust (i.e. the upper and middle crust) remains at crustal levels and contributes to crustal thickening and mountain building.
description: System Erde; 3