cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective protection of quantum coherence by non-Hermitian driving
Creators: name: Huang, Kai-Qian
name: Zhao, Wen-Lei
name: Li, Zhi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this letter, we investigate the effects of non-Hermitian driving on quantum coherence in a bipartite system. The results that the dynamical localization destroyed by the Hermitian interaction revives are an evidence of the restoration of quantum coherence by non-Hermitian driving. Besides, the entanglement between the two subsystems also decays with the boosting of non-hermitian driving strength, which provides another evidence that non-Hermitian driving will protect quantum coherence. The physics behind this phenomenon is the domination of the quasieigenstate with maximum imaginary value of the quasieigenvalue on the dynamics of the non-Hermitian system. Our discovery establishes a restoration mechanism of quantum coherence in interacting and dissipative quantum systems, which is highly relevant to experiments in diverse fields from many-body physics to quantum information.
description: 6 pages, 3 figures
Congruence Engine: The Summation
Creators: name: Boon, Tim
Publisher: name: Science Museum Group
Year: 2025
Subjects: research
collections
industrial heritage
history of technology
Towards a National Collection
digital
heritage

description: We want to make all UK heritage collections fully accessible together, not just institution-by institution as now, to those who would use them. The means to achieve this are their digital records. But, because of the history of heritage organisations, our current records are ill-suited for this purpose: in the main, they are thin, inconsistent and isolate collections items from the contexts in which they make sense. In Congruence Engine, we have therefore experimentally created ways to link collections with historical data as well as with each other, techniques that in various ways overcome these weaknesses. Because the creation of useful collections linkage requires the agency of its potential users, and because computing techniques are fallible, UK collections linkage requires a social machine for the task: a human-technical approach that mobilises human motivation and thereby overcomes machine incapacities. Many of our techniques employ machine learning, with the result that we have within our grasp the capacity to overcome decades of limited investment in collection documentation. But, because we are using these techniques, we confront a series of ethical issues that demand to be researched, even as we press for the resources to create user interfaces and scalable prototypes for a future infrastructure, which together can reveal the potential of what we have glimpsed.
Dynamic Performance Management: An Approach for Managing the Common Goods
Creators: name: Sardi, A.
name: Sorano, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: Performance (cs.PF)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Public organizations need innovative approaches for managing common goods and to explain the dynamics linking the (re)generation of common goods and organizational performance. Although system dynamics is recognised as a useful approach for managing common goods, public organizations rarely adopt the system dynamics for this goal. The paper aims to review the literature on the system dynamics and its recent application, known as dynamic performance management, to highlight the state of the art and future opportunities on the management of common goods. The authors analyzed 144 documents using a systematic literature review. The results obtained outline a fair number of documents, countries and journals involving the study of system dynamics, but do not cover sufficient research on the linking between the (re)generation of common goods and organizational performance. This paper outlines academic and practical contributions. Firstly, it contributes to the theory of common goods. It provides insight for linking the management of common goods and organizational performance through the use of dynamic performance management approach. Furthermore, it shows scholars the main research opportunities. Secondly, it indicates to practitioners the documents providing useful ideas on the adoption of system dynamics for managing common goods.
Enhancement of inductive power transfer with flat spiral resonators
Sviluppi del trasferimento di energia elettrica mediante risonatori piani a spirale
Creators: name: Puccetti, Giovanni <1986>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: ING-IND/31 Elettrotecnica

description: The aim of this thesis is to develop a depth analysis of the inductive power transfer (or wireless power transfer, WPT) along a metamaterial composed of cells arranged in a planar configuration, in order to deliver power to a receiver sliding on them. In this way, the problem of the efficiency strongly affected by the weak coupling between emitter and receiver can be obviated, and the distance of transmission can significantly be increased. This study is made using a circuital approach and the magnetoinductive wave (MIW) theory, in order to simply explain the behavior of the transmission coefficient and efficiency from the circuital and experimental point of view. Moreover, flat spiral resonators are used as metamaterial cells, particularly indicated in literature for WPT metamaterials operating at MHz frequencies (5-30 MHz). Finally, this thesis presents a complete electrical characterization of multilayer and multiturn flat spiral resonators and, in particular, it proposes a new approach for the resistance calculation through finite element simulations, in order to consider all the high frequency parasitic effects. Multilayer and multiturn flat spiral resonators are studied in order to decrease the operating frequency down to kHz, maintaining small external dimensions and allowing the metamaterials to be supplied by electronic power converters (resonant inverters).
On the User Behavior Leakage from Recommender System Exposure
Creators: name: Xin, Xin
name: Yang, Jiyuan
name: Wang, Hanbing
name: Ma, Jun
name: Ren, Pengjie
name: Luo, Hengliang
name: Shi, Xinlei
name: Chen, Zhumin
name: Ren, Zhaochun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Modern recommender systems are trained to predict users potential future interactions from users historical behavior data. During the interaction process, despite the data coming from the user side recommender systems also generate exposure data to provide users with personalized recommendation slates. Compared with the sparse user behavior data, the system exposure data is much larger in volume since only very few exposed items would be clicked by the user. Besides, the users historical behavior data is privacy sensitive and is commonly protected with careful access authorization. However, the large volume of recommender exposure data usually receives less attention and could be accessed within a relatively larger scope of various information seekers. In this paper, we investigate the problem of user behavior leakage in recommender systems. We show that the privacy sensitive user past behavior data can be inferred through the modeling of system exposure. Besides, one can infer which items the user have clicked just from the observation of current system exposure for this user. Given the fact that system exposure data could be widely accessed from a relatively larger scope, we believe that the user past behavior privacy has a high risk of leakage in recommender systems. More precisely, we conduct an attack model whose input is the current recommended item slate (i.e., system exposure) for the user while the output is the user's historical behavior. Experimental results on two real-world datasets indicate a great danger of user behavior leakage. To address the risk, we propose a two-stage privacy-protection mechanism which firstly selects a subset of items from the exposure slate and then replaces the selected items with uniform or popularity-based exposure. Experimental evaluation reveals a trade-off effect between the recommendation accuracy and the privacy disclosure risk.
description: Submitted to the Special Section on Trustworthy Recommendation and Search of ACM TOIS on May 31, 2022 and accepted on October 4
Combined phase space characterization at the PEP-II IP using single-beam and luminous-region measurements
Creators: name: Bevan, A.
name: Kozanecki, W.
name: Viaud, B.
name: Cai, Y.
name: Fisher, A.
name: O'Grady, C.
name: Thompson, J.
name: Weaver, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We present a novel method to characterize the e+/- phase space at the IP of the SLAC B-factory, that combines single-beam measurements with a detailed mapping of luminous-region observables. Transverse spot sizes are determined in the two rings with synchrotron-light monitors and extrapolated to the IP using measured lattice functions. The specific luminosity, which is proportional to the inverse product of the overlap IP beam sizes, is continuously monitored using radiative-Bhabha events. The spatial variation of the luminosity and of the transverse-boost distribution of the colliding e+/-, are measured using e+ e- --> mu+ mu- events reconstructed in the BaBar detector. The combination of these measurements provide constraints on the emittances, horizontal and vertical spot sizes, angular divergences and beta functions of both beams at the IP during physics data-taking. Preliminary results of this combined spot-size analysis are confronted with independent measurements of IP beta-functions and overlap IP beam sizes at low beam current.
description: Poster presented to European Particle Accelerator Conference (EPAC'06), Edinburgh, Scotland, 26-30 June 2006
Heinrich Schlange-Schöningen, Augustus. Geschichte kompakt – Antike
Creators: name: Knoch, Stefan
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Heinrich Schlange-Schöningen, Augustus. Geschichte kompakt – Antike. Darmstadt: Wissenschaftliche Buchgesellschaft 2005. IX + 157 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Feasibility and diagnostic effectiveness of new capsule endoscopy techniques
Valutazione di fattibilita' ed efficacia di nuove metodiche di enteroscopia con videocapsula
Creators: name: Cavallaro, Flaminia <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: MED/22 Chirurgia vascolare

description: Since its approval by FDA in 2001, capsule endoscopy revolutionized the study of small bowel. One of the main limitations of its diffusion has been the high cost. 
More recently, a new videocapsule system (OMOM CE) has been developed in China and obtained the CE mark. Its cost is approximately half that of other capsule systems. However, there are few studies regarding the clinical experience with this new videocapsule system and none of them has been performed in the western world.
Among the limitations of capsule endoscopy, there is also one linked to the diagnostic yield. The rapid transit of the device in the proximal segments implies a high risk of false negatives; an indirect confirmation of this limit is offered by the poor ability to identify the papilla of Vater.
In addition, recent studies show that in patients with obscure gastrointestinal bleeding, the negative outcome of capsule endoscopy is correlated to a significant risk of recurrence of anemia in the short term, as well as the presence of small bowel lesions documented by a second capsule endoscopy.
It was recently approved the use of a new device called "CapsoCam" (CapsoVision, Inc. Saratoga) characterized by four side cameras that offer a panoramic view of 360 degrees, instead of the front to 160°.
Two recent pilot studies showed comparable safety profiles and diagnostic yield with the more standardized capsule. Namely, side vision has made possible a clear visualization of the papilla in 70% of cases.
The aim of our study is to evaluate the feasibility and diagnostic yield of these two new devices, which first may allow a reduction in costs. Moreover, their complementary use could lead to a recovery diagnostic in patients with false negative results in an initial investigation.
Günther Schörner, Votive im römischen Griechenland. Untersuchungen zur späthellenistischen und kaiserzeitlichen Kunst- und Religionsgeschichte
Creators: name: Schäfer, Martin
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Günther Schörner, Votive im römischen Griechenland. Untersuchungen zur späthellenistischen und kaiserzeitlichen Kunst- und Religionsgeschichte. Wiesbaden Altertumswissenschaftliches Kolloquium Bd. 7. Stuttgart: Steiner 2003. 638 S., 100 Tafeln.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Combinatorics of linear iterated function systems with overlaps
Creators: name: Sidorov, Nikita
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 60J05

description: Let $\bm p_0,...,\bm p_{m-1}$ be points in ${\mathbb R}^d$, and let $\{f_j\}_{j=0}^{m-1}$ be a one-parameter family of similitudes of ${\mathbb R}^d$: $$ f_j(\bm x) = λ\bm x + (1-λ)\bm p_j, j=0,...,m-1, $$ where $λ\in(0,1)$ is our parameter. Then, as is well known, there exists a unique self-similar attractor $S_λ$ satisfying $S_λ=\bigcup_{j=0}^{m-1} f_j(S_λ)$. Each $\bm x\in S_λ$ has at least one address $(i_1,i_2,...)\in\prod_1^\infty\{0,1,...,m-1\}$, i.e., $\lim_n f_{i_1}f_{i_2}... f_{i_n}({\bf 0})=\bm x$. We show that for $λ$ sufficiently close to 1, each $\bm x\in S_λ\setminus\{\bm p_0,...,\bm p_{m-1}\}$ has $2^{\aleph_0}$ different addresses. If $λ$ is not too close to 1, then we can still have an overlap, but there exist $\bm x$'s which have a unique address. However, we prove that almost every $\bm x\in S_λ$ has $2^{\aleph_0}$ addresses, provided $S_λ$ contains no holes and at least one proper overlap. We apply these results to the case of expansions with deleted digits. Furthermore, we give sharp sufficient conditions for the Open Set Condition to fail and for the attractor to have no holes. These results are generalisations of the corresponding one-dimensional results, however most proofs are different.
description: Accepted for publication in Nonlinearity
DP-Sync: Hiding Update Patterns in Secure Outsourced Databases with Differential Privacy
Creators: name: Wang, Chenghong
name: Bater, Johes
name: Nayak, Kartik
name: Machanavajjhala, Ashwin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In this paper, we have introduced a new type of leakage associated with modern encrypted databases called update pattern leakage. We formalize the definition and security model of DP-Sync with DP update patterns. We also proposed the framework DP-Sync, which extends existing encrypted database schemes to DP-Sync with DP update patterns. DP-Sync guarantees that the entire data update history over the outsourced data structure is protected by differential privacy. This is achieved by imposing differentially-private strategies that dictate the data owner's synchronization of local~data.
Annetta Alexandridis, Die Frauen des römischen Kaiserhauses. Eine Untersuchung ihrer bildlichen Darstellung von Livia bis Iulia Domna
Creators: name: Schade, Kathrin
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Annetta Alexandridis, Die Frauen des römischen Kaiserhauses. Eine Untersuchung ihrer bildlichen Darstellung von Livia bis Iulia Domna, Mainz: Philipp von Zabern 2004, XV + 432 S., 64 Taf.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
1E161348-5055 in the Supernova Remnant RCW 103: A Magnetar in a Young Low Mass Binary System?
Creators: name: Pizzolato, Fabio
name: Colpi, Monica
name: De Luca, Andrea
name: Mereghetti, Sandro
name: Tiengo, Andrea
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We suggest that the unique X-ray source 1E161348-5055 at the centre of the supernova remnant RCW 103 consists of a neutron star in close orbit with a low mass main sequence star. The time signature of 6.67 hr is interpreted as the neutron star's spin period. This requires the neutron star to be endowed with a high surface magnetic field of~10^15 G. Magnetic or/and material (propeller) torques are able to spin rapidly the young neutron star down to an asymptotic, equilibrium spin period in close synchronism with the orbital period, similarly to what happens in the Polar Cataclysmic Variables. 1E161348-5055 could be the first case of a magnetar born in a young low mass binary system.
description: Accepted for publication in the ApJ
EOSC-Life: Providing an open collaborative space for digital biology in Europe
Creators: name: Blomberg, Niklas
name: Schmidt-Tremmel, Friederike
Publisher: name: F1000 Research Limited
Year: 2019

description: A H2020 cluster project uniting 13 European life science research infrastructures (LS RIs), bringing together 46 + 17 partners to create an open collaborative digital space for life science in the European Open Science Cloud.
Graviton propagator in loop quantum gravity
Creators: name: Bianchi, Eugenio
name: Modesto, Leonardo
name: Rovelli, Carlo
name: Speziale, Simone
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute some components of the graviton propagator in loop quantum gravity, using the spinfoam formalism, up to some second order terms in the expansion parameter.
description: 41 pages, 6 figures
CORBEL: Harmonising access to Europe's biomedical research infrastructures
Creators: name: Hauk, Christiane
name: Hansen, Sonja
name: Leitner, Frauke
name: Schmidt-Tremmel, Friederike
Publisher: name: F1000 Research Limited
Year: 2019

description: A H2020 cluster project uniting 13 European biological and medical research infrastructures (BMS RIs), bringing together 37 partners offering cutting-edge technologies, biological samples and expertise to researchers.
Szaivert, Wolfgang – Wolters, Reinhard: Löhne, Preise, Werte. Quellen zur römischen Geldwirtschaft
Creators: name: Müller, Holger
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Szaivert, Wolfgang – Wolters, Reinhard: Löhne, Preise, Werte. Quellen zur römischen Geldwirtschaft, Wissenschaftliche Buchgesellschaft: Darmstadt 2005, X + 376 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
When to suspect GATA2 deficiency in pediatric patients: from complete blood count to diagnosis
Creators: name: Saettini, F.
name: Coliva, T.
name: Vendemini, F.
name: Moratto, D.
name: Savoldi, G.
name: Borlenghi, E.
name: Masetti, R.
name: Niemeyer, C. M.
name: Biondi, A.
name: Balduzzi, A.
name: Bonanomi, S.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Hematology

description: When to suspect GATA2 deficiency in pediatric patients: from complete blood count to diagnosis
P. Kruschwitz – M. Schumacher, Das vorklassische Lehrgedicht der Römer
Creators: name: Fondermann, Philipp
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: P. Kruschwitz – M. Schumacher, Das vorklassische Lehrgedicht der Römer, Winter: Heidelberg 2005, 168 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Cyber Risk in Health Facilities: A Systematic Literature Review
Creators: name: Sardi, Alberto
name: Rizzi, Alessandro
name: Sorano, Enrico
name: Guerrieri, Anna
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: Systems and Control (eess.SY)
subject: FOS: Economics and business
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The current world challenges include issues such as infectious disease pandemics, environmental health risks, food safety, and crime prevention. Through this article, a special emphasis is given to one of the main challenges in the healthcare sector during the COVID-19 pandemic, the cyber risk. Since the beginning of the Covid-19 pandemic, the World Health Organization has detected a dramatic increase in the number of cyber-attacks. For instance, in Italy the COVID-19 emergency has heavily affected cybersecurity; from January to April 2020, the total of attacks, accidents, and violations of privacy to the detriment of companies and individuals has doubled. Using a systematic and rigorous approach, this paper aims to analyze the literature on the cyber risk in the healthcare sector to understand the real knowledge on this topic. The findings highlight the poor attention of the scientific community on this topic, except in the United States. The literature lacks research contributions to support cyber risk management in subject areas such as Business, Management and Accounting; Social Science; and Mathematics. This research outlines the need to empirically investigate the cyber risk, giving a practical solution to health facilities. Keywords: cyber risk; cyber-attack; cybersecurity; computer security; COVID-19; coronavirus;information technology risk; risk management; risk assessment; health facilities; healthcare sector;systematic literature review; insurance
Characterization of epitaxial semiconductor films by scanning tunneling microscopy at ambient pressure
Creators: name: Pinnington, Thomas H.
Publisher: name: University of British Columbia
Year: 2008

description: Epitaxial layers grown by molecular beam epitaxy on both silicon and gallium arsenide substrates are exposed by cleaving and studied by scanning tunneling microscopy (STM) at ambient pressure. The cleaved surfaces are prepared for imaging by wet chemical treatments. GaAs/AlGaAs and Si/SiGe multilayer structures are imaged with —1 nm resolution. The contrast in the STM images is believed to be topographic in origin, resulting either from selective etching during surface preparation or strain-relaxation at the cleaved surface. Layers of alternating dopant-type are also resolved. In particular, alternately doped layers on GaAs are imaged by STM for the first time in air, and the pn junctions located to within 20 nm. The apparent topographic contrast in these images is explained in terms of an electronic contrast mechanism associated with the carrier type. Current-voltage (IV) characteristics of the STM tunnel junction are obtained at selected locations in the epitaxial layers. IV curves acquired over n- and p-type regions resemble the IV characteristics of Schottky barrier diodes. A new imaging method is proposed which exploits the contrast between the n- and p-type IV curves. Imaging in this mode is achieved by repetitively interrupting the constant-current feedback loop during the scan and recording the tunnel current at a new tip-sample voltage setting, preselected to yield high conductivity-type contrast. This method, which decouples the electronic contrast associated with the carrier type from the topography, is demonstrated for an npn structure on GaAs. Modification of the treated GaAs and Si surfaces is observed during imaging, and is attributed to a chemical change in the surface enhanced by the tunneling process. Photoemission spectroscopy of the treated GaAs surface indicates that the treatment inhibits oxidation, possibly by formation of a thin sulfur passivation layer. The photoemission results also suggest that selective removal of the arsenic atoms occurs during the treatment, which may also help to produce a more stable surface.
Two topics for a discussion on the $b \bar s$ and $b \bar q$ systems
Creators: name: Colangelo, P.
name: De Fazio, F.
name: Ferrandes, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The analysis of the $b \bar s$ system is an important issue in the Physics programs of the hadron colliders. We discuss two different topics: the structure of the orbitally excited states and prediction of the rates of a class of non leptonic $B_s$ decays.
description: 6 pages, 1 figure. Invited talk at the First Workshop on Theory, Phenomenology and Experiments in Heavy Flavour Physics, Anacapri, Italy, May 29-31, 2006 - v2: two misprints corrected
Alchemical free energy calculations: Differentiating approaches, measuring impact, and surveying the open source ecosystem
Creators: name: Chodera, John
Publisher: name: Zenodo
Year: 2019
Subjects: free energy calculations
alchemical free energy calculations
CADD GRC
Computer Aided Drug Discovery
Gordon Research Conference

description: Talk given at the 2019 Computer Aided Drug Discovery (CADD) GRC at Mount Snow, VT on 15 July 2019. https://www.grc.org/computer-aided-drug-design-conference/2019/
A. Hoffmann – U. Wulf (Hrsg.), Die Kaiserpaläste auf dem Palatin in Rom
Creators: name: Sojc, Natascha
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: A. Hoffmann – U. Wulf (Hrsg.), Die Kaiserpaläste auf dem Palatin in Rom, Mainz: Philipp von Zabern 2004, 188 S., 99 Farb-, 40 sw- und 106 Strichabb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Angelika Meier – Christoph Schäfer, Computer und antike Texte. Wortrecherche, Konkordanz- und Indexerstellung mit Volltextdatenbanken
Creators: name: Spickermann, Wolfgang
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Angelika Meier – Christoph Schäfer, Computer und antike Texte. Wortrecherche, Konkordanz- und Indexerstellung mit Volltextdatenbanken. 2., völlig neu überarbeitete Auflage, St. Katharinen 2003, XII + 257 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Paul Zanker – Björn Christian Ewald, Mit Mythen leben
Creators: name: Bielfeldt, Ruth
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Paul Zanker – Björn Christian Ewald, Mit Mythen leben, München 2004, 392 S., 48 Farb-, 252 sw-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
C. Häuber – F.X. Schütz, Einführung in Archäologische Informationssysteme (AIS). Ein Methodenspektrum für Schule, Studium und Beruf mit Beispielen auf CD
Creators: name: Schäfer, Felix F.
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: C. Häuber – F.X. Schütz, Einführung in Archäologische Informationssysteme (AIS). Ein Methodenspektrum für Schule, Studium und Beruf mit Beispielen auf CD, Mainz (Philipp von Zabern) 2004, 160 S., 48 Farb-, 33 sw-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Karl Reinhard Krierer, Antike Germanenbilder
Creators: name: Heitz, Christian
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Karl Reinhard Krierer, Antike Germanenbilder. Archäologische Forschungen 11 (Hrsg. J. Borchhardt – F. Krinzinger), Verlag der Österreichischen Akademie der Wissenschaften, Philosophisch-Historische Klasse 318, Wien 2004, 259 S., 166 Abb., 49 Taf.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Integrating land surface conditions and transport networks to quantify the spatial accessibility of cities in China
Creators: name: Chen, Wei
name: Liu, Weidong
name: Liu, Zhigao
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Plant Biology

description: Although there is a need to determine the spatial accessibility of cities in China, the limitations in available data and methods hinder research in this area. The main objective of this study was to quantify the accessibility of cities in China. We developed a comprehensive analytical method to quantify spatial accessibility at a spatial resolution of one kilometer by integrating both land surface conditions and transport networks. The results show that the spatial patterns of accessibility of Chinese cities at the prefecture level and above are characterized by significant spatial heterogeneity, consistent with the patterns in physical geography, population density, and economic activities. The results improve our understanding of deficiencies in the accessibility of cities in China and provide a foundation for transportation infrastructure planning.
Götz Lahusen – Edilberto Formigli, Römische Bildnisse aus Bronze. Kunst und Technik
Creators: name: Fuchs, Michaela
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Götz Lahusen – Edilberto Formigli, Römische Bildnisse aus Bronze. Kunst und Technik, München: Hirmer 2001, 542 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Wiebrecht Ries, Die Philosophie der Antike
Creators: name: Reichardt, Tobias
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Wiebrecht Ries, Die Philosophie der Antike, Wissenschaftliche Buchgesellschaft, Darmstadt 2005 (Basiswissen Philosophie), 175 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
A single phase Al₀ 3Ga₀ 7As/GaAs heterojunction resistive-gate charge-coupled device
Creators: name: Wohlmuth, Walter Anthony
Publisher: name: University of British Columbia
Year: 2008

description: The design, fabrication, and evaluation of a 128 pixel, single phase A10.3GavAs/GaAs heterojunction resistive-gate charge-coupled device (HRGCCD) is described. The HRGCCD has a higher operating speed and a larger charge handling capacity in comparison to the conventional buried channel, resistive-gate GaAs charge-coupled device (GaAs RGCCD). The higher operating speed of HRGCCDs is due to the higher electron mobility and velocity in an AlGaAs/GaAs heterojunction in contrast to a GaAs homojunction. In addition, the HRGCCDs can be integrated with high-speed on-chip high electron mobility transistors (HEMTs). The larger charge handling capacity of a HRGCCD is the direct result of the higher electron density in a HRGCCD in comparison to a GaAs RGCCD. A quantum mechanical model is used to calculate the carrier density in a triangular potential well formed at the interface between an undoped AlGaAs layer and an undoped GaAs layer. This model is coupled to a solution of Poisson's equation in bulk AlGaAs to determine the total carrier density in a HRGCCD for different layer and material specifications. This model is used to aid in the design of the HRGCCD. The fabrication of the HRGCCD required six mask levels employing 405 nm contact photolithography with a 1.0 µm design rule. Developments in the process technology previously employed at TRIUMF were required to create the HRGCCDs. These developments included a standard chlorobenzene-aided photoresist lift-off process to delineate r.f. magnetron sputtered Cr:SiO islands and a dry etch process to create interconnect vias. Two process runs of HRGCCDs, with differing layer parameters, were fabricated and evaluated at 4.33 MHz and at 50 MHz. The HRGCCDs tested at 50 MHz exhibited a charge transfer efficiency in excess of 0.99, and a dynamic range in excess of 50 dB with a linear response over a 40 dB input signal range.
Frequency Response of the Mechanochemically Synthesized AgI-Ag2O-B2O3 Superionic Glasses
Creators: name: Verma, Ankur
name: Shahi, K
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The synthesis of xAgI(1-x)[Ag2O.B2O3] amorphous superionic conductors is done via mechanochemical synthesis route (for x = 0.5 and 0.7). Ionic conductivities of 3 mOhm-1cm-1 for x = 0.5 sample and 5mOhm-1cm-1 for x = 0.7 sample at room temperature, are observed, which are higher than those of the melt quenched glassy samples. Impedance plots (Nyquist plots) are found to be depressed semicircles with a tail at low frequency end. The corresponding equivalent circuit is postulated and each circuit element is related to a physical process. The ac conductivity is analyzed in view of the universal dynamic response (Bode Plots). A unique feature of the mechnochemically synthesized glasses is that their dc conductivity vs. 1/T behavior exhibit two distinct regions with different activation energies. The activation energy for dc conductivity (Edc) and that for ac conductivity (Eac) and the frequency exponent n are found to satisfy the UDR-relation, Eac= (1-n)Edc in the lower temperature regime. In the high temperature region, however, this correlation could not be established due to lack of sac data over the available frequency domain.
description: Presented in the "6th National Conference on Solid State Ionics" held at Jadavpur University, Kolkata, India, during October 5-7, 2004. Contains 4 pages and 6 figures
Dietrich Boschung, Gens Augusta. Untersuchungen zu Aufstellung, Wirkung und Bedeutung der Statuengruppen des julisch-claudischen Kaiserhauses
Creators: name: Alexandridis, Annetta
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Dietrich Boschung, Gens Augusta. Untersuchungen zu Aufstellung, Wirkung und Bedeutung der Statuengruppen des julisch-claudischen Kaiserhauses, Mainz 2002 (Philipp von Zabern), XV + 233 S., 32 Strich-Abb., 96 Taf. u. 9 Beil.
description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
The Bee Simile: How Vergil Emulated Apollonius in His Use of Homeric Poetry
Creators: name: Polleichtner, Wolfgang
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
METAkube – META-pipe over Kubernetes
Creators: name: Marcadella, Mayeul
name: Agafonov, Alexander
name: Molchanov, Igor
name: Robertsen, Espen
name: Nils-Peder Willassen
Publisher: name: F1000 Research Limited
Year: 2019

description: META-pipe is a specialized pipeline for assembly, annotation and analysis of marine metagenomic samples. Provided as a service to the ELIXIR community, it is an invaluable resource for metagenomics of the marine domain.
A new kubernetes-based implementation, coined METAkube, let us explore modern frameworks for big data and heterogenous scientific pipelines.
Tropicalization of group representations
Creators: name: Alessandrini, Daniele
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this paper we give an interpretation to the boundary points of the compactification of the parameter space of convex projective structures on an n-manifold M. These spaces are closed semi-algebraic subsets of the variety of characters of representations of the fundamental group of M in SL_{n+1}(R). The boundary was constructed as the tropicalization of this semi-algebraic set. Here we show that the geometric interpretation for the points of the boundary can be constructed searching for a tropical analogue to an action of the group on a projective space. To do this we need to construct a tropical projective space with many invertible projective maps. We achieve this using a generalization of the Bruhat-Tits buildings for SL_{n+1} to non-archimedean fields with real surjective valuation. In the case n = 1 these objects are the real trees used by Morgan and Shalen to describe the boundary points for the Teichmuller spaces. In the general case they are contractible metric spaces with a structure of tropical projective spaces.
description: 27 pages, 1 figure; Changes in version 2: minor changes, some references added. Changes in version 3: the paper has been updated according to the companion paper arXiv:0801.0165 v1, some typos corrected
The impact of acute nutritional interventions on the plasma proteome.
Creators: name: Vernardis, Spyros I
name: Demichev, Vadim
name: Lemke, Oliver
name: Grüning, Nana-Maria
name: Messner, Christoph
name: White, Matt
name: Pietzner, Maik
name: Peluso, Alina
name: Collet, Tinh-Hai
name: Henning, Elana
name: Gille, Christoph
name: Campbell, Archie
name: Hayward, Caroline
name: Porteous, David J
name: Marioni, Riccardo E
name: Mülleder, Michael
name: Zelezniak, Aleksej
name: Wareham, Nicholas J
name: Langenberg, Claudia
name: Farooqi, I Sadaf
name: Ralser, Markus
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: classificationCode: Synthetic Biology
subject: Synthetic Biology
classificationCode: Chemical Biology & High Throughput
subject: Chemical Biology & High Throughput
classificationCode: Ecology,Evolution & Ethology
subject: Ecology,Evolution & Ethology
classificationCode: Metabolism
subject: Metabolism
classificationCode: Computational & Systems Biology
subject: Computational & Systems Biology

description: CONTEXT: Humans respond profoundly to changes in diet, while nutrition and environment have a great impact on population health. It is hence important to deeply characterise the human nutritional responses. OBJECTIVE: Endocrine parameters and the metabolome of human plasma are rapidly responding to acute nutritional interventions such as caloric restriction or a glucose challenge. It is less well understood whether the plasma proteome would be equally dynamic, and whether it could be a source of corresponding biomarkers. METHODS: We used high-throughput mass spectrometry to determine changes in the plasma proteome of i) ten healthy, young, male individuals in response to two days of acute caloric restriction followed by refeeding, ii) 200 individuals of the Ely epidemiological study before and after a glucose tolerance test at four time points (0, 30, 60, 120 minutes), and iii) 200 random individuals from the Generation Scotland study. We compare the proteomic changes detected to metabolome data as well as endocrine parameters. RESULTS: Both acute nutritional interventions, caloric restriction and the glucose challenge, substantially impacted the plasma proteome. Proteins responded across individuals or in an individual-specific manner. We identify nutrient-responsive plasma proteins that correlate with changes in the metabolome, as well as with endocrine parameters. In particular, our study highlights the role of apolipoprotein C1 (APOC1), a small, understudied apolipoprotein that was affected by caloric restriction and dominated the response to glucose consumption and differed in abundance between individuals with and without type 2 diabetes. CONCLUSION: Our study identifies APOC1 as a dominating nutritional responder in humans, and highlights the interdependency of acute nutritional response proteins and the endocrine system.
Probing Ultracold Collisional Dynamics with Frequency-Chirped Pulses
Creators: name: Wright, M. J.
name: Pechkis, J. A.
name: Carini, J. L.
name: Gould, P. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the dynamics of ultracold collisions induced by near-resonant frequency-chirped light. A series of identical chirped pulses, separated by a variable delay, is applied to an ultracold sample of 85Rb, and the rate of inelastic trap-loss collisions is measured. For small detunings of the chirped light below the atomic resonance, we observe that the rate of collisions induced by a given pulse can be increased by the presence of an earlier pulse. We attribute this to the enhancement of short-range collisional flux by the long-range excitation of atom pairs to an attractive molecular potential. For larger detunings and short delays, we find that a leading pulse can suppress the rate of collisions caused by a following pulse. This is due to a depletion of short-range atom pairs by the earlier pulse. Comparison of our data to classical Monte-Carlo simulations of the collisions yields reasonable agreement.
description: Accepted by PRA
STAN: Spatio-Temporal Attention Network for Next Location Recommendation
Creators: name: Luo, Yingtao
name: Liu, Qiang
name: Liu, Zhaocheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The next location recommendation is at the core of various location-based applications. Current state-of-the-art models have attempted to solve spatial sparsity with hierarchical gridding and model temporal relation with explicit time intervals, while some vital questions remain unsolved. Non-adjacent locations and non-consecutive visits provide non-trivial correlations for understanding a user's behavior but were rarely considered. To aggregate all relevant visits from user trajectory and recall the most plausible candidates from weighted representations, here we propose a Spatio-Temporal Attention Network (STAN) for location recommendation. STAN explicitly exploits relative spatiotemporal information of all the check-ins with self-attention layers along the trajectory. This improvement allows a point-to-point interaction between non-adjacent locations and non-consecutive check-ins with explicit spatiotemporal effect. STAN uses a bi-layer attention architecture that firstly aggregates spatiotemporal correlation within user trajectory and then recalls the target with consideration of personalized item frequency (PIF). By visualization, we show that STAN is in line with the above intuition. Experimental results unequivocally show that our model outperforms the existing state-of-the-art methods by 9-17%.
description: Accepted to The Web Conference (WWW2021)
Alte Männer im Klassischen Athen (5. Jh. v. Chr.) – An den Rand gedrängt?
Creators: name: Hübner, Sabine
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Different fractal properties of positive and negative returns
Creators: name: Oswiecimka, P.
name: Kwapien, J.
name: Drozdz, S.
name: Gorski, A. Z.
name: Rak, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We perform an analysis of fractal properties of the positive and the negative changes of the German DAX30 index separately using Multifractal Detrended Fluctuation Analysis (MFDFA). By calculating the singularity spectra $f(α)$ we show that returns of both signs reveal multiscaling. Curiously, these spectra display a significant difference in the scaling properties of returns with opposite sign. The negative price changes are ruled by stronger temporal correlations than the positive ones, what is manifested by larger values of the corresponding Hölder exponents. As regards the properties of dominant trends, a bear market is more persistent than the bull market irrespective of the sign of fluctuations.
description: presented at FENS2007 conference, 8 pages, 4 Figs
Die Chancenverteilung zwischen Patriziern und Plebejern in den 'comitia consularia'
Creators: name: Bunse, Robert
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 8 (2005): Göttinger Forum für Altertumswissenschaft
Magnetoacoustic shocks as driver of quiet Sun mottles
Creators: name: van der Voort, L. H. M. Rouppe
name: de Pontieu, B.
name: Hansteen, V. H.
name: Carlsson, M.
name: van Noort, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high spatial and high temporal resolution observations of the quiet Sun in H-alpha obtained with the Swedish 1-m Solar Telescope on La Palma. We observe that many mottles, jet-like features in the quiet Sun, display clear up- and downward motions along their main axis. In addition, many mottles show vigorous transverse displacements. Unique identification of the mottles throughout their lifetime is much harder than for their active region counterpart, dynamic fibrils. This is because many seem to lack a sharply defined edge at their top, and significant fading often occurs throughout their lifetime. For those mottles that can be reliably tracked, we find that the mottle tops often undergo parabolic paths. We find a linear correlation between the deceleration these mottles undergo and the maximum velocity they reach, similar to what was found earlier for dynamic fibrils. Combined with an analysis of oscillatory properties, we conclude that at least part of the quiet Sun mottles are driven by magnetoacoustic shocks. In addition, the mixed polarity environment and vigorous dynamics suggest that reconnection may play a significant role in the formation of some quiet Sun jets.
description: 12 pages, 4 figures. ApJ Letters, in press
Cluster Catalysis with Lattice Oxygen: Tracing Oxygen Transport from a Magnetite(001) Support onto Small Pt Clusters
Creators: name: Kaiser, Sebastian
name: Maleki, Farahnaz
name: Zhang, Ke
name: Harbich, Wolfgang
name: Heiz, Ueli
name: Tosoni, Sergio
name: Lechner, Barbara A. J.
name: Pacchioni, Gianfranco
name: Esch, Friedrich
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Oxidation catalysis on reducible oxide-supported small metal clusters often involves lattice oxygen. In the present work, we trace the path of lattice oxygen from Fe3O4(001) onto small Pt clusters during the CO oxidation, aiming at differentiating whether the reaction takes place at the cluster/support interface or on the cluster. While oxygen vacancies form on many other supports, magnetite maintains its surface stoichiometry upon reduction thanks to a high cation mobility. In order to investigate whether size-dependent oxygen affinities play a role, we study two specific cluster sizes, Pt5 and Pt19. By separating different reaction steps in our experiment, lattice oxygen can be accumulated on the clusters. Temperature programmed desorption (TPD) and sophisticated pulsed valve experiments indicate that the CO oxidation takes place on the Pt clusters rather than at the interface. Scanning tunneling microscopy (STM) shows a decrease in apparent height of the clusters, which density functional theory (DFT) explains as a restructuring following lattice oxygen reverse spillover.