cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Black hole entropy for the general area spectrum
Creators: name: Tanaka, Tomo
name: Tamaki, Takashi
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the possibility that the horizon area is expressed by the general area spectrum in loop quantum gravity and calculate the black hole entropy by counting the degrees of freedom in spin-network states related to its area. Although the general area spectrum has a complex expression, we succeeded in obtaining the result that the black hole entropy is proportional to its area as in previous works where the simplified area formula has been used. This gives new values for the Barbero-Immirzi parameter ($γ=0.5802... \mathrm{or} 0.7847...$) which are larger than that of previous works.
description: 5 pages
title: Monte Iato, Italien: Die hellenistisch-römischen Metallfunde
Creators: name: Rasbach, Gabriele
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: The Monte Iato was settled since the 6th century BC till the 13th century AD. It is a long-term project of the University Zürich and the University Innsbruck which deals with metal finds of Hellenistic and Roman times. Sensational are the number of brooches. Most of the fibulae are of Jezerine, Alesia and Aucissa types from late 2nd and 1st century BC. Especially the Jezerine type was – at the current state of research – mainly distributed in the Italia Padana and in the north-eastern Alps. These finds might reflect auxiliar troops of the civil war.
Morphologies of Galaxies in and around a Protocluster at z=2.300
Creators: name: Peter, Annika H. G.
name: Shapley, Alice E.
name: Law, David R.
name: Steidel, Charles C.
name: Erb, Dawn K.
name: Reddy, Naveen A.
name: Pettini, Max
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from the first robust investigation of galaxy morphology as a function of environment at z>1.5. Our study is motivated by the fact that star-forming galaxies contained within a protocluster at z=2.3 in the HS1700+64 field have significantly older ages and larger stellar masses on average than those at similar redshifts but more typical environmental densities. In the analysis of HST/ACS images, we apply non-parametric statistics to characterize the rest-frame UV morphologies of a sample of 85 UV-selected star-forming galaxies at z=1.7-2.9, 22 of which are contained in the protocluster. The remaining 63 control-sample galaxies are not in the protocluster but have a similar mean redshift of ~2.3. We find no environmental dependence for the distributions of morphological properties. Combining the measured morphologies with the results of population synthesis modeling, we find only weak correlations, if any, between morphological and stellar population properties such as stellar mass, age, extinction and star-formation rate. Given the incomplete census of the protocluster galaxy population, and the lack of correlation between rest-frame UV morphology and star-formation history at z~2 within our sample, the absence of environmental trends in the distribution of morphological properties is not surprising. Additionally, using a larger sample of photometric candidates, we compare morphological distributions for 282 UV-selected and 43 near-IR-selected galaxies. While the difference in the degree of nebulosity between the two samples appears to be a byproduct of the fainter average rest-frame UV surface brightness of the near-IR-selected galaxies, we find that, among the lowest surface brightness galaxies, the near-IR-selected objects have significantly smaller angular sizes (abridged).
description: 25 pages including 16 figures. Accepted for publication in ApJ. Version with full resolution figures available at http://www.astro.princeton.edu/~apeter/LBG/papers/peter2007_fullres.ps.gz
title: Cumae und Paestum, Italien: Hellenistische Heiligtümer in Campanien
Creators: name: Wolf, Markus
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: In the context of a wider study of Hellenistic altars and sanctuaries in Campania the temple of Apollo at Cuma and a group of hellenistic tempietti in the Northwest of the southern sanctuary at Paestum were explored. At Cuma the temple of the early imperial period, the main building phase, could be reconstructed but also a hellenistic, samnitic peripteros with elements in stone which were reused in the roman building could be distinguished. The ionic temple of Cuma enriches our image of monumental ionic architecture in central and southern Italy. The hellenistic Amphiprostylos of Paestum however could be reconstructed with a tetrastyle doric frontfacade.
The design of a distributed interpreter for concurrent Prolog
Creators: name: Tam, Chun Man
Publisher: name: University of British Columbia
Year: 2010

description: Prolog is a programming language based on predicate logic. Its successor, Concurrent Prolog, was designed to meet the needs of a multiprocessing environment to the extent that it may be desirable as a succinct language for writing operating systems. Here, we demonstrate the feasibility of implementing a distributed interpreter for Concurrent Prolog using traditional programming tools under a multiprocess structuring methodology. We will discuss the considerations that must be made in a distributed environment and how the constructs of the language may be implemented. In particular, several subtle pitfalls associated with the implementation of read-only variables and the propagation of new bindings will be illustrated. In addition, a modification to Shapiro's treatment of read-only variables is proposed in an attempt to "clean up" the semantics of the language. (The discussion will centre around a primitive version of an interpreter for the language written in Zed (a language similar to C) on an Unix-like operating system, Verex. Although a brief introduction of Prolog and Concurrent Prolog will be given, it is assumed that the reader is familiar with the paper A Subset of Concurrent Prolog and Its Interpreter by E.Y. Shapiro [Shapiro83].)
title: Ancona und Capua, Italien: Die Amphitheater
Creators: name: Beste, Heinz-Jürgen
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: Founded by the Greeks of Siracusa, Ancona was later an important Roman city. Two important remains date from that period: the Amphitheatre and the Arco di Traiano, dominating the new port constructed after the Dacian Wars. From the amphitheater, located on the hill that was home to the Greek acropolis, it is still possible to see the steps of the cavea and, moving through the adjacent streets, the magnificent basements integrated in the medieval houses. The thermal baths in its annex feature breathtaking mosaics with various epigraphs. The amphitheater of Santa Maria Capua Vetere, the ancient Capua is the third largest in the ancient world, with axis lengths of 166.38 × 136.67 m, after the amphitheater of Pozzuoli and the Colosseum in Rome, and has many architectural references to the Coliseum. It was erected probably in Flavian times and restored by emperor Hadrian and dedicated by Antonius Pius. Eighty Doric arcades formed the exterior disposed on third levels. It could contain more than 50.000 spectators and the subterranea are among the best preserved in the world.
De Sitter Space and Eternity
Creators: name: Polyakov, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper explores infrared quantum effects in the de Sitter space. The notion of "eternal manifolds" is introduced and it is shown that in most cases the de Sitter space doesn't belong to this class. It is unstable under small perturbations which may cause a breakdown of the de Sitter symmetry. The de Sitter string sigma model is discussed. It is argued that the gauge theory at the complex coupling is dual to the matrix elements of vertex operators in the de Sitter space, taken between the Bunch - Davies vacuum and the "out" state without particles.The described infrared effects are likely to screen away the cosmological constant.
description: 27 pages important comments added. references added
Ethical Implementation of Artificial Intelligence to Select Embryos in In Vitro Fertilization
Creators: name: Afnan, Michael Anis Mihdi
name: Rudin, Cynthia
name: Conitzer, Vincent
name: Savulescu, Julian
name: Mishra, Abhishek
name: Liu, Yanhe
name: Afnan, Masoud
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: AI has the potential to revolutionize many areas of healthcare. Radiology, dermatology, and ophthalmology are some of the areas most likely to be impacted in the near future, and they have received significant attention from the broader research community. But AI techniques are now also starting to be used in in vitro fertilization (IVF), in particular for selecting which embryos to transfer to the woman. The contribution of AI to IVF is potentially significant, but must be done carefully and transparently, as the ethical issues are significant, in part because this field involves creating new people. We first give a brief introduction to IVF and review the use of AI for embryo selection. We discuss concerns with the interpretation of the reported results from scientific and practical perspectives. We then consider the broader ethical issues involved. We discuss in detail the problems that result from the use of black-box methods in this context and advocate strongly for the use of interpretable models. Importantly, there have been no published trials of clinical effectiveness, a problem in both the AI and IVF communities, and we therefore argue that clinical implementation at this point would be premature. Finally, we discuss ways for the broader AI community to become involved to ensure scientifically sound and ethically responsible development of AI in IVF.
Phase diagram for condensation of microcavity polaritons: from theory to practice
Creators: name: Marchetti, F. M.
name: Szymanska, M. H.
name: Keeling, J.
name: Kasprzak, J.
name: Andre, R.
name: Littlewood, P. B.
name: Dang, Le Si
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The first realization of a polariton condensate was recently achieved in a CdTe microcavity [Kasprzak et al., Nature 443, 409 (2006)]. We compare the experimental phase boundaries, for various detunings and cryostat temperatures, with those found theoretically from a model which accounts for features of microcavity polaritons such as reduced dimensionality, internal composite structure, disorder in the quantum wells, polariton-polariton interactions, and finite lifetime.
description: 8 pages, 6 figures (Phys. Rev. B, to appear)
Magnetic field effect on topological spin excitations in CrI$_3$
Creators: name: Chen, Lebing
name: Chung, Jae-Ho
name: Stone, Matthew B.
name: Kolesnikov, Alexander I.
name: Winn, Barry
name: Garlea, V. Ovidiu
name: Abernathy, Douglas L.
name: Gao, Bin
name: Augustin, Mathias
name: Santos, Elton J. G.
name: Dai, Pengcheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The search for topological spin excitations in recently discovered two-dimensional (2D) van der Waals (vdW) magnetic materials is important because of their potential applications in dissipation-less spintronics. In the 2D vdW ferromagnetic (FM) honeycomb lattice CrI$_3$(T$_C$= 61 K), acoustic and optical spin waves were found to be separated by a gap at the Dirac points. The presence of such a gap is a signature of topological spin excitations if it arises from the next nearest neighbor(NNN) Dzyaloshinskii-Moriya (DM) or bond-angle dependent Kitaev interactions within the Cr honeycomb lattice. Alternatively, the gap is suggested to arise from an electron correlation effect not associated with topological spin excitations. Here we use inelastic neutron scattering to conclusively demonstrate that the Kitaev interactions and electron correlation effects cannot describe spin waves, Dirac gap and their in-plane magnetic field dependence. Our results support the DM interactions being the microscopic origin of the observed Dirac gap. Moreover, we find that the nearest neighbor (NN) magnetic exchange interactions along the axis are antiferromagnetic (AF)and the NNN interactions are FM. Therefore, our results unveil the origin of the observedcaxisAF order in thin layers of CrI$_3$, firmly determine the microscopic spin interactions in bulk CrI$_3$, and provide a new understanding of topology-driven spin excitations in 2D vdW magnets.
title: Uruk, Irak: Forschungen im Rahmen der Interpretation und Publikation der Grundlagendaten
Creators: name: van Ess, Margarete
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: Since 2003, fieldwork in Uruk-Warka, Southern Iraq had to be substituted by intensive work on the final publications of previous excavation results. In recent years, these results were processed for secondary interpretation and presentation to the public. 3D reconstructions of architecture excavated in Uruk as well as animations of 3D data and interpretations derived from analysis of all archaeological and additional philological sources. These were combined and designed for an exhibition and merged for future scientific research. Furthermore, a project presenting additional analyses of 14C samples from the late Uruk and the Jemdet Nasr periods has been carried out and published.
Mixture-Based Correction for Position and Trust Bias in Counterfactual Learning to Rank
Creators: name: Vardasbi, Ali
name: de Rijke, Maarten
name: Markov, Ilya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: In counterfactual learning to rank (CLTR) user interactions are used as a source of supervision. Since user interactions come with bias, an important focus of research in this field lies in developing methods to correct for the bias of interactions. Inverse propensity scoring (IPS) is a popular method suitable for correcting position bias. Affine correction (AC) is a generalization of IPS that corrects for position bias and trust bias. IPS and AC provably remove bias, conditioned on an accurate estimation of the bias parameters. Estimating the bias parameters, in turn, requires an accurate estimation of the relevance probabilities. This cyclic dependency introduces practical limitations in terms of sensitivity, convergence and efficiency. We propose a new correction method for position and trust bias in CLTR in which, unlike the existing methods, the correction does not rely on relevance estimation. Our proposed method, mixture-based correction (MBC), is based on the assumption that the distribution of the CTRs over the items being ranked is a mixture of two distributions: the distribution of CTRs for relevant items and the distribution of CTRs for non-relevant items. We prove that our method is unbiased. The validity of our proof is not conditioned on accurate bias parameter estimation. Our experiments show that MBC, when used in different bias settings and accompanied by different LTR algorithms, outperforms AC, the state-of-the-art method for correcting position and trust bias, in some settings, while performing on par in other settings. Furthermore, MBC is orders of magnitude more efficient than AC in terms of the training time.
description: CIKM 2021
title: Fürstensitz von Vix , Frankreich
Creators: name: Komp, Rainer
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: The German Archaeological Institute is supporting the international project „Vix et son environnement“ by executing surveys applying a vehicle driven high resolution, large scale geomagnetic system. The aim is to investigate the surroundings of the princely site of Vix, dated to the Hallstatt and La Tène era to get an idea of the contextual landscape. Establishing this method in the last three years, prehistoric and historic as well as recent and geological features were discovered. An area of nearly 200 ha was prospected. Detailed views of tumuli as well as new traces of further graves were identified. Among others, gallo-roman villae and even a small late roman settlement enhance the knowledge of greater Vix.
Observing a Quantum Measurement
Creators: name: Lawrence, Jay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: With the example of a Stern-Gerlach measurement on a spin-1/2 atom, we show that a superposition of both paths may be observed compatibly with properties attributed to state collapse - for example, the singleness (or mutual exclusivity) of outcomes. This is done by inserting a quantum two-state system (an ancilla) in each path, capable of responding to the passage of the atom, and thus acting as a virtual detector. We then consider real measurements on the compound system of atomic spin and two ancillae. Nondestructive measurements of a set of compatible joint observables can be performed, one for a superposition and others for collapse properties. A novel perspective is given as to why, within unitary quantum theory, ordinary measurements are blind to such superpositions. Implications for the theory of measurement are discussed.
description: 21 pages, 3 figures
Sparse sampling: Spatial design for monitoring stream networks
Creators: name: Dobbie, Melissa J.
name: Henderson, Brent L.
name: Stevens, Don L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Spatial designs for monitoring stream networks, especially ephemeral systems, are typically non-standard, `sparse' and can be very complex, reflecting the complexity of the ecosystem being monitored, the scale of the population, and the competing multiple monitoring objectives. The main purpose of this paper is to present a review of approaches to spatial design to enable informed decisions to be made about developing practical and optimal spatial designs for future monitoring of streams.
description: Published in at http://dx.doi.org/10.1214/07-SS032 the Statistics Surveys (http://www.i-journals.org/ss/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Improved lower bounds for request-response and finitary Streett games
Creators: name: Chatterjee, Krishnendu
name: Henzinger, Thomas
name: Horn, Florian
Publisher: name: IST Austria
Year: 2009
Subjects: 000 Computer science, knowledge & general works

description: We consider two-player games played on graphs with request-response and finitary Streett objectives. We show these games are PSPACE-hard, improving the previous known NP-hardness. We also improve the lower bounds on memory required by the winning strategies for the players.
TRANSFORMATIONAL LEADERSHIP AND JOB SATISFACTION: THE CASE OF PUBLIC INSTITUTIONS IN JORDAN
Creators: name: DIAA ALI SULAIMAN ALKHREHEH
Publisher: name: Zenodo
Year: 2023
Subjects: ---

description: Abstract

This study aims to discuss the impact of transformational leadership on job satisfaction among the workers of the Jordanian Public Institutions, the study mainly aimed to analyze the impact of transformational leadership on job satisfaction among the workers of the. The researcher relied on the descriptive analytical method, by referring to theoretical literature related to the subject of the current study, in addition to developing a questionnaire as a major tool to collect data from the study sample. The respondents of the study are all employees and administrators at Social Security Corporation and Vocational Training Corporation. The total population of the social security corporation is (1200) employees and (1240) employees at Vocational Training Corporation based on the human resource department of the Jordanian Prime Minister 2020. There is an impact of transformational leadership (ideal effect, motivation) on job satisfaction among the staff at level (α≤0.05). the study found that the positive relationship and good treatment between managers and employees, the improvement of their performance level, the development of their skills and their appreciation contribute to increasing the levels of satisfaction among the employees and the transformational leader plays a pivotal role in shaping the values and cultures of schools, but they can only fulfill this role by showing their interpersonal and interactive skills, and from this point of view, transformational leaders in a changing world must possess the necessary skills that help them formulate values and lead change..
Number of solitons produced from a large initial pulse in the generalized NLS dispersive hydrodynamics theory
Creators: name: de Brito, L. F. Calazans
name: Kamchatnov, A. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We show that the number of solitons produced from an arbitrary initial pulse of the simple wave type can be calculated analytically if its evolution is governed by a generalized nonlinear Schrödinger equation provided this number is large enough. The final result generalizes the asymptotic formula derived for completely integrable nonlinear wave equations like the standard NLS equation with the use of the inverse scattering transform method.
description: 6 pages, 2 figures
Matching Kasteleyn Cities for Spin Glass Ground States
Creators: name: Thomas, Creighton K.
name: Middleton, A. Alan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: As spin glass materials have extremely slow dynamics, devious numerical methods are needed to study low-temperature states. A simple and fast optimization version of the classical Kasteleyn treatment of the Ising model is described and applied to two-dimensional Ising spin glasses. The algorithm combines the Pfaffian and matching approaches to directly strip droplet excitations from an excited state. Extended ground states in Ising spin glasses on a torus, which are optimized over all boundary conditions, are used to compute precise values for ground state energy densities.
description: 4 pages, 2 figures; minor clarifications
title: Ostseeraum, Deutschland/Polen: Die frühmittelalterlichen Emporien im südwestlichen Ostseeraum und ihre Häfen
Creators: name: Messal, Sebastian
name: Jörns, Hauke
name: Karle, Martina
name: Lüth, Friedrich
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: During the Early Middle Ages the Baltic Sea region formed the zone of contact between the Scandinavian kingdoms, the Frankish Empire, and the Baltic and Slavic tribal areas. In the area between the Bay of Wismar and Gdańsk Bay, populated by Slavs during the Early and High Middle Ages, nine maritime trading centres have been identified so far; their harbours were key interfaces between land and water transport. The research plan envisages a systematic and interdisciplinary investigation of the harbour structures of these early medieval sites from a topographical, economic and social perspective.
Slides for - Case Studies of Deep Learning for Channel Decoding and Power Control
Creators: Dr. Cong Shen
Publisher: name: IEEE
Year: 2021

Webinar Slides - SPS Webinar, September 14 2021, Dr. Cong Shen
This webinar will demonstrate how deep learning can solve difficult communication problems that prior approaches often fail with two case studies. The first half will discuss a novel iterative BP-CNN architecture for channel decoding under correlated noise. This architecture concatenates a trained convolutional neural network (CNN) with a standard belief-propagation (BP) decoder. The standard BP decoder is used to estimate the coded bits, followed by a CNN to remove the estimation errors of the BP decoder and obtain a more accurate estimation of the channel noise. The second half will discuss PCNet, a deep neural network (DNN) based power control method that aims at solving the non-convex optimization problem of maximizing the sum rate of a fading multi-user interference channel. A key challenge in training a DNN for the power control problem is the lack of ground truth, i.e., the optimal power allocation is unknown. To address this issue, PCNet leverages the unsupervised learning strategy and directly maximizes the sum rate in the training phase. This webinar will also incorporate ensemble learning with multiple independently trained PCNets to achieve universally superior performance over state-of-the-art power control solutions under a variety of system configurations.
On the Mean-Field Limit of Bosons with Coulomb Two-Body Interaction
Creators: name: Froehlich, Juerg
name: Knowles, Antti
name: Schwarz, Simon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35Q40 (Primary); 37K05, 81Q20, 82C40 (Secondary)

description: In the mean-field limit the dynamics of a quantum Bose gas is described by a Hartree equation. We present a simple method for proving the convergence of the microscopic quantum dynamics to the Hartree dynamics when the number of particles becomes large and the strength of the two-body potential tends to 0 like the inverse of the particle number. Our method is applicable for a class of singular interaction potentials including the Coulomb potential. We prove and state our main result for the Heisenberg-picture dynamics of "observables", thus avoiding the use of coherent states. Our formulation shows that the mean-field limit is a "semi-classical" limit.
description: Corrected typos and included an elementary proof of the Kato smoothing estimate (Lemma 6.1)
On the structure of quasi-stationary competing particle systems
Creators: name: Arguin, Louis-Pierre
name: Aizenman, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60G55 (Primary), 60G10 (Secondary)

description: We study point processes on the real line whose configurations $X$ are locally finite, have a maximum and evolve through increments which are functions of correlated Gaussian variables. The correlations are intrinsic to the points and quantified by a matrix $Q=\{q_{ij}\}_{i,j\in\mathbb{N}}$. A probability measure on the pair $(X,Q)$ is said to be quasi-stationary if the joint law of the gaps of $X$ and of $Q$ is invariant under the evolution. A known class of universally quasi-stationary processes is given by the Ruelle Probability Cascades (RPC), which are based on hierarchically nested Poisson--Dirichlet processes. It was conjectured that up to some natural superpositions these processes exhausted the class of laws which are robustly quasi-stationary. The main result of this work is a proof of this conjecture for the case where $q_{ij}$ assume only a finite number of values. The result is of relevance for mean-field spin glass models, where the evolution corresponds to the cavity dynamics, and where the hierarchical organization of the Gibbs measure was first proposed as an ansatz.
description: Published in at http://dx.doi.org/10.1214/08-AOP429 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Outline of a novel architecture for cortical computation
Creators: name: Majumdar, Kaushik
Publisher: name: arXiv
Year: 2007
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: In this paper a novel architecture for cortical computation has been proposed. This architecture is composed of computing paths consisting of neurons and synapses only. These paths have been decomposed into lateral, longitudinal and vertical components. Cortical computation has then been decomposed into lateral computation (LaC), longitudinal computation (LoC) and vertical computation (VeC). It has been shown that various loop structures in the cortical circuit play important roles in cortical computation as well as in memory storage and retrieval, keeping in conformity with the molecular basis of short and long term memory. A new learning scheme for the brain has also been proposed and how it is implemented within the proposed architecture has been explained. A number of mathematical results about the architecture have been proposed, many of which without proof.
description: 21 pages, four figures
Thermal transport evolution due to nanostructural transformations in Ga-doped indium-tin-oxide thin films
Creators: name: Cocemasov, Alexandr
name: Brinzari, Vladimir
name: Jeong, Do-Gyeom
name: Korotcenkov, Ghenadii
name: Vatavu, Sergiu
name: Lee, Jong S.
name: Nika, Denis L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on a comprehensive theoretical and experimental investigation of thermal conductivity in indium-tin-oxide (ITO) thin films with various Ga concentrations (0-30 at. %) deposited by spray pyrolysis technique. X-Ray diffraction (XRD) and scanning electron microscopy have shown a structural transformation in the range 15-20 at. % Ga from the nanocrystalline to the amorphous phase. Room temperature femtosecond time domain thermoreflectance measurements showed nonlinear decrease of thermal conductivity in the range 2.0-0.5 W/(m K) depending on Ga doping level. Comparing density functional theory calculations with XRD data it was found that Ga atoms substitute In atoms in the ITO nanocrystals retaining Ia-3 space group symmetry. The calculated phonon dispersion relations revealed that Ga doping leads to the appearance of hybridized metal atom vibrations with avoided-crossing behavior. These hybridized vibrations possess shortened mean free paths and are the main reason behind the thermal conductivity drop in nanocrystalline phase. An evolution from propagative to diffusive phonon thermal transport in ITO:Ga with 15-20 at. % of Ga was established. The suppressed thermal conductivity of ITO:Ga thin films deposited by spray pyrolysis may be crucial for their thermoelectric applications.
description: 21 pages, 8 figures
Balanced Families of Perfect Hash Functions and Their Applications
Creators: name: Alon, Noga
name: Gutner, Shai
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The construction of perfect hash functions is a well-studied topic. In this paper, this concept is generalized with the following definition. We say that a family of functions from $[n]$ to $[k]$ is a $δ$-balanced $(n,k)$-family of perfect hash functions if for every $S \subseteq [n]$, $|S|=k$, the number of functions that are 1-1 on $S$ is between $T/δ$ and $δT$ for some constant $T>0$. The standard definition of a family of perfect hash functions requires that there will be at least one function that is 1-1 on $S$, for each $S$ of size $k$. In the new notion of balanced families, we require the number of 1-1 functions to be almost the same (taking $δ$ to be close to 1) for every such $S$. Our main result is that for any constant $δ> 1$, a $δ$-balanced $(n,k)$-family of perfect hash functions of size $2^{O(k \log \log k)} \log n$ can be constructed in time $2^{O(k \log \log k)} n \log n$. Using the technique of color-coding we can apply our explicit constructions to devise approximation algorithms for various counting problems in graphs. In particular, we exhibit a deterministic polynomial time algorithm for approximating both the number of simple paths of length $k$ and the number of simple cycles of size $k$ for any $k \leq O(\frac{\log n}{\log \log \log n})$ in a graph with $n$ vertices. The approximation is up to any fixed desirable relative error.
title: Waldgirmes, Deutschland: Abschluss der Arbeiten und Publikation
Creators: name: Rasbach, Gabriele
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: The long-term project of the Roman civil site in Waldgirmes, which dated to the late Augustan period, had provided new input to help understand the complexity of Romano-Germanic-affairs of this time. Waldgirmes shows that the territory beyond the Rhine was taking the first steps towards becoming a Roman province. The site has a few military elements, but mostly reflects aspects of different civil and rural communities. Waldgirmes is located at the river Lahn and about 7 km southwest of the late Iron Age oppidum on the Dünsberg. At the current state of research this pre-Roman settlement ended around 30/15 BC, so a few years before the Roman occupation in the Germania. Surprisingly the settlement was not abandoned immediately after the defeat of Varus in AD 9, but probably continued in use until AD 16. In spring 2016, the first volume concerning the project’s results was published.
Developing Robust Bidding Strategy for Virtual Bidders in Day-Ahead Electricity Markets
Creators: Hossein Mehdipourpicha
Siyuan Wang
and Rui Bo
Publisher: name: IEEE
Year: 2021

This paper proposes a max-min two-level optimization model to derive the optimal bidding strategy of virtual bidders.
Purely financial players without any physical assets can participate in day-ahead electricity markets as virtual bidders. They can arbitrage the price difference between day-ahead (DA) and real-time (RT) markets to maximize profits. Virtual bidders encounter various monetary risks and uncertainties in their decision-making due to the high volatility of the price difference. Therefore, this paper proposes a max-min two-level optimization model to derive the optimal bidding strategy of virtual bidders. In this model, the risks of uncertainties associated with the rivals' strategies and RT market prices are managed by robust optimization. The proposed max-min two-level model is turned into a single-level mixed integer linear programming model through duality theory (DT), strong duality theory (SDT), and Karush-Kuhn-Tucker (KKT) conditions. An illustrative case is designed to demonstrate the advantages of the proposed model over the deterministic model. Moreover, case studies on the IEEE 24-bus test system validate the applicability of the proposed model.
Threshold scans in diffractive W pair production via QED processes at the LHC
Creators: name: Boonekamp, M.
name: Cammin, J.
name: Peschanski, R.
name: Royon, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new set of measurements which can be performed at the LHC using roman pot detectors. This new method is based on exploiting excitation curves to measure kinematical properties of produced particles. We illustrate it in the case of central diffractive W pair production.
description: Accepted by Phys. Lett. B - 1 reference added
title: Rügen, Deutschland: Archäologische Untersuchungen an Großsteingräbern im Pastitzer Forst
Creators: name: Behrens, Anja
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: In the 4th millennium BC cultural changes took place in northern Europe when hunter-gatherer societies were confronted with farming as a new way of life. Connected to these changes are findings and remains of the Funnel Beaker Culture (TBR), mainly known for megalithic graves visible above ground. In the study of this culture Rügen island plays a central role due to its isolation and the big number of monuments which were built there. Considering historical maps and on the basis of extensive investigations conclusions about burial practices and their evolution in space and time can be postulated. During current field works a cemetery in the forest of Pastitz was detected and investigated. Detailed insights about the cemetery structure and its use were gained during this campaign.
Supercurrent survival under Rosen-Zener quench of hard core bosons
Creators: name: Klich, I.
name: Lannert, C.
name: Refael, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the survival of super-currents in a system of impenetrable bosons subject to a quantum quench from its critical superfluid phase to an insulating phase. We show that the evolution of the current when the quench follows a Rosen-Zener profile is exactly solvable. This allows us to analyze a quench of arbitrary rate, from a sudden destruction of the superfluid to a slow opening of a gap. The decay and oscillations of the current are analytically derived, and studied numerically along with the momentum distribution after the quench. In the case of small supercurrent boosts $ν$, we find that the current surviving at long times is proportional to $ν^3$.
Probabilistic Assessment on Area-Level Frequency Nadir/Vertex for Operational Planning
Creators: Jiaxin Wen
Siqi Bu
and Huanhai Xin
Publisher: name: IEEE
Year: 2021

This paper proposes a framework for assessing the risk of area-level frequency nadir/vertex for operational planning in a practical and effective manner.
Local heterogeneity of the frequency response of modern grids becomes more severe than ever before due to 1) weaker grid connection strength brought by the favorable grid interconnection, and 2) more uncertainties and less system inertia brought by the increasing renewable integration. This dominant characteristic is difficult to be accurately characterized and evaluated by the classic aggregated system frequency response (SFR) model. Therefore, this paper proposes a framework for assessing the risk of area-level frequency nadir/vertex (FN/FV) for operational planning in a practical and effective manner. Firstly, a multi-point sensitivity (MPS) is proposed based on the classical SFR model to evaluate the system FN/FV, where the impact of different Renewable Energy Sources (RESs) on system FN/FV are considered. The method can be extended for regional frequency evaluation, but the influence of generator frequency oscillation cannot be effectively considered, which might impact assessment accuracy. To address this issue, a multi-interval sensitivity (MIS) method is further proposed to calculate the probabilistic distribution of the area-level FN/FV. The probabilistic results are evaluated by the FN/FV RAM, i.e., Risk Assessment Matrix, to provide a two-dimensional analysis for system operational planners. The accuracy and efficiency of the proposed MPS and MIS methods are critically validated via scenario-based simulation (SBS) in a modified IEEE 16-machine 68-bus benchmark system.
title: Sarnevo, Bulgarien: Neolithische Tells in Nordthrakien
Creators: name: Komp, Rainer
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: The German Archaeological Institute was conducting geomagnetical surveys using a large scale magnetometry system in the area of Sarnevo, Bulgaria in the years 2014 and 2015. During the construction of the so called Thracian Motorway the site became recently known for neolithic ritual places and tell settlements. The investigation successfully resulted in images showing dwellings on tells and satellite settlements surrounded by circled earthworks. The typical diameter of the enclosures is about 130 m. Casually recorded geological features add information to the reconstruction of ancient landscapes. Further, destruction of archaeological objects by recent unsupervised interventions become obvious.
title: Kupres, Bosnien-Herzegowina: Von der Natur- zur Kultur- zur Rituallandschaft
Creators: name: Müller-Scheeßel, Nils
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: In the last years surveys as well as palynological and geophysical prospections were carried out in the high plain of Kupres, Bosnia-Herzegovina. A newly available 14C-date suggests human usage of the plain already during the Eneolithic. During the Bronze Age the plain seems to have taken on a sacred aspect, as grave mounds were built, most of them visible from quite far away. This suggests a significant opening of the landscape, which is confirmed by pollen analysis. Two probably contemporaneous hilltop settlements were placed so that the largest part of the mounds was not visible from there.
September - General Issue
Creators: Elli Ntakou
F. Selin Yanikara
and Jeffrey Schlegelmilch
Roberto Menozzi and Dario Costi
Irene Shaji
Gayatri Doctor
and Poornima Dore
Sathiyakeerthi M
Publisher: name: IEEE
Year: 2021

Newsletter
This is a general issue on Smart Cities featuring "US cities vs climate change: Current status and road map for the future," "A university-driven regional-scale initiative for transitioning to smart and wise cities and towns in the northern Italian Emilia region," "EXPLORING OPEN DATA JOURNEY OF INDIAN SMART CITIES," and "Eye in the 5G Sky for smart cities"
title: Draʿ Abu el-Naga, Ägypten: Untersuchungen zu Formation und Entwicklung einer oberägyptischen Residenznekropole
Creators: name: Polz, Daniel
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: The past two spring seasons in the field were dedicated to the continuation of archaeological work in Area H of the Institute’s project in Draʿ Abu el-Naga in the north-eastern part of the Theban Necropolis, opposite the modern city of Luxor / Upper Egypt. Area H is located in the middle of the foothills of Draʿ Abu el-Naga and contains two widely visible landmarks: the remains of the mud-brick pyramid of king Nub-Kheper-Ra Intef (late 17th dynasty, ca. 1580 BC), and the large 12-pillared ‘Saff’ tomb no. 232 (TT 232, early 18th dynasty, ca. 1550 BC). Over centuries, both monuments and installations in their environment seem to have served as platforms, even local centers, not only of funerary but also religious and cultic activities.
Interview with Oscar H. Gandy, Jr., July 22, 2019 (Session One)
Creators: name: Gandy, Jr., Oscar H.
name: Pooley, Jefferson
Publisher: name: Annenberg School for Communication Library Archives
Year: 2024
Subjects: history of media studies
history of communication research
history of social science

description: In the session Gandy recounts his childhood on Long Island, New York, and his exposure to social science at Nassau Community College. He describes his decision to attend the University of New Mexico, and his work as a research assistant to radical sociologist Harold Meier. He discusses his coursework in sociology and in the psychology of learning, his friendships with anthropologist-students, and his participation in anti-Vietnam War protests. Gandy’s decision to apply to the University of Pennsylvania for a social work master’s is discussed, together with his decision, soon after, to abandon the program. He recounts his move out to Oakland, California, where an unsuccessful stint selling encyclopedias led him back to Philadelphia and a master’s at the Annenberg School for Communication at Penn, as mentored by then-dean George Gerbner. Gandy’s experiences at the Annenberg School, and his concurrent work producing a public affairs TV program, is discussed. The interview continues with Gandy describing his move to the University of California at San Diego, to teach production in the university’s new communication program, and his exposure to Herbert Schiller and others. Gandy recounts his decision to pursue a doctorate at Stanford University, and some of his coursework with economists, radical education scholars, and communication faculty such as Emile McAnany. The interview includes a discussion of Gandy’s dissertation on educational technology and defense, and his post-graduation travels to India and a short, failed stint to work on development in Tanzania. Gandy, to close the session, recounts his postdoc at Annenberg, arranged by Gerbner, before his departure for Howard University.
title: Forschungsvorhaben MGA: Münze und Gesellschaft in Alteuropa
Creators: name: Wigg-Wolf, David
Publisher: name: Deutsches Archäologisches Institut
Year: 2017

description: e-Forschungsberichte, Faszikel 2 (2016)
description: MGA considers numismatic material as evidence for social, political, economic and cultural developments in an area stretching from Britain to the Black Sea. The basis is the collection and documentation of coin finds from the study area in the database AFE, which has been specially developed together with DBIS, Goethe University, Frankfurt. AFE is also used by the Polish partner project „Finds of Ancient Coins from Territory Historically Associated with Poland“ at the University of Warsaw. AFE employs the concepts of the Linked Open Data project Nomisma.org, and is thus fully integrated into both external projects such as Online Coins of the Roman Empire (OCRE), and the iDAI resources Gazetteer and Zenon.
Notes on quantum evolution across singularities
Creators: name: Evnin, Oleg
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a number of model contexts, evolution across space-time singularities (reminiscent of the cosmological singularities) involves time-dependent quantum Hamiltonians developing a singularity as a function of time. In this contribution to the proceedings of the 3rd RTN workshop in Valencia, I review some recent investigations of the general properties of such systems.
description: 8 pages
Vessel and Port Efficiency Metrics through Validated AIS data
Creators: name: Martincic, Tomaz
name: Stepec, Dejan
name: Costa, Joao Pita
name: Cagran, Kristijan
name: Chaldeakis, Athanasios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Automatic Identification System (AIS) data represents a rich source of information about maritime traffic and offers a great potential for data analytics and predictive modeling solutions, which can help optimizing logistic chains and to reduce environmental impacts. In this work, we address the main limitations of the validity of AIS navigational data fields, by proposing a machine learning-based data-driven methodology to detect and (to the possible extent) also correct erroneous data. Additionally, we propose a metric that can be used by vessel operators and ports to express numerically their business and environmental efficiency through time and spatial dimensions, enabled with the obtained validated AIS data. We also demonstrate Port Area Vessel Movements (PARES) tool, which demonstrates the proposed solutions.
description: OCEANS 2020