cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring structured predictions from sensorimotor data during non-prehensile manipulation using both simulations and robots
Creators: name: Zhu, Chuan
Publisher: name: University of British Columbia
Year: 2013

description: Robots are equipped with an increasingly wide array of sensors in order to enable advanced sensorimotor capabilities. However, the efficient exploitation of the resulting data streams remains an open problem. We present a framework for learning when and where to attend in a sensorimotor stream in order to estimate specific task properties, such as the mass of an object. We also identify the qualitative similarity of this ability between simulation and robotic system. The framework is evaluated for a non-prehensile ”topple-and-slide” task, where the data from a set of sensorimotor streams are used to predict the task property, such as object mass, friction coefficient, and compliance of the block being manipulated. Given the collected data streams for situations where the block properties are known, the method combines the use of variance-based feature selection and partial least-squares estimation in order to build a robust predictive model for the block properties. This model can then be used to make accurate predictions during a new manipulation. We demonstrate results for both simulation and robotic system using up to 110 sensorimotor data streams, which include joint torques, wrist forces/torques, and tactile information. The results show that task properties such as object mass, friction coefficient and compliance can be estimated with good accuracy from the sensorimotor streams observed during a manipulation.
Introducing PHAEDRA: a new spectral code for simulations of relativistic magnetospheres
Creators: name: Parfrey, Kyle
name: Beloborodov, Andrei M.
name: Hui, Lam
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We describe a new scheme for evolving the equations of force-free electrodynamics, the vanishing-inertia limit of magnetohydrodynamics. This pseudospectral code uses global orthogonal basis function expansions to take accurate spatial derivatives, allowing the use of an unstaggered mesh and the complete force-free current density. The method has low numerical dissipation and diffusion outside of singular current sheets. We present a range of one- and two-dimensional tests, and demonstrate convergence to both smooth and discontinuous analytic solutions. As a first application, we revisit the aligned rotator problem, obtaining a steady solution with resistivity localised in the equatorial current sheet outside the light cylinder.
description: 23 pages, 18 figures, accepted for publication in MNRAS
A Ka-band high power monolithic HEMT VCO using a sub-resonator circuit with phase control architecture
Creators: name: Kashiwa, Takuo
name: Katoh, Takayuki
name: Ishida, Takao
name: Kurusu, Hitoshi
name: Mitsui, Yasuo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper reports on a high output performance of a Ka-band monolithic HEMT Voltage Controlled Oscillator(VCO). This VCO has a sub-resonator in order to avoid reduction in Q-factor of a resonator. Circuit elements of the sub-resonator are optimized to achieve a wide tuning range as well as high output power and low phase noise performances. In addition, an AlGaAs/InGaAs double-hetero struc­ture High Electron Mobility Transistor(HEMT) is employed in the VCO to obtain a high output per­formance. A high output power of 19.4 dBm has been achieved at an oscillation frequency of 36.2 GHz. This performance has been achieved without any buffer amplifiers. A tuning range of more than 2.5 GHz is also obtained with a stable high output power. To our knowledge, this represents the high­est output power of monolithic VCO without any buffer amplifiers.
Trematodes Faldermann 1835
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Trematodes

description: Trematodes Faldermann, 1835
[4 species].
Type species Trematodes pallasii Faldermann, 1835 (= Trematodes tenebrioides (Pallas, 1781)), by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 132, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Il cinema tra paure post 11 settembre e il mal d'archivio nell'epoca dei new media
Creators: name: Bisoni, Claudio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: L-ART/06 Cinema, fotografia e televisione

description: L'articolo, partendo dall'immaginario cinematografico del cinema americano post 11 settembre, propone una lettura di due film (Redacted, Cloverfield) ipotizzando che ognuno dei due sia sintomo di altrettante tipiche paure contemporanee. Il primo esprime timori nei confronti di un "eccesso di mediazione e di documentabilità " comune alla società  digitalizzata", mentre il secondo, al contrario, un eccesso di "percezione non mediata" della realtà  brutale.
Choice Architecture, Framing, and Cascaded Privacy Choices
Creators: name: Adjerid, Idris
name: Acquisti, Alessandro
name: Loewenstein, George
Publisher: name: Carnegie Mellon University
Year: 2021
Subjects: subject: 10206 Operations Research
subject: FOS: Mathematics
subject: 170202 Decision Making
subject: FOS: Psychology

description: or consumers, managing privacy online requires navigating a complex process of interrelated choices. This process may be conceived of as "cascaded," in that a combination of upstream choices (e.g., of privacy settings on a social network site) and downstream choices (e.g., of what to reveal on the site) together determine ultimate privacy outcomes. In a series of experiments, we examine the potential impact of choice architecture in cascaded privacy choice settings. We investigate how changes in choice frames implemented by service providers can influence consumers' upstream disclosure settings, often in ways that they are unaware of and that may be destructive to them. Whether the effects of choice frames upstream are ultimately detrimental to individuals' privacy, however, depends on whether they are offset by more or less protective downstream choices. Thus, we also examine whether such upstream effects of choice architecture are "mitigated" through changes in downstream self-disclosure. We find, first, that various manipulations of decision frames, common in privacy contexts, significantly impact participants' upstream choice of disclosure settings. Second, we do not find evidence that the impact of choice architecture upstream is mitigated downstream: participants' self-disclosure rates do not adjust or change in response to choice architecture-induced changes in upstream choices. These findings call into question both policy makers' and industry advocates' reliance on choice-based privacy protection mechanisms, contribute to an emerging behavioral perspective on privacy decision making, and highlight the importance of accounting for the cascaded nature of privacy decision making in both policy and managerial settings.
On the second largest eigenvalue of the signless Laplacian
Creators: name: de Lima, Leonardo S.
name: Nikiforov, Vladimir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Spectral Theory (math.SP)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $G$ be a graph of order $n,$ and let $q_{1}(G) \geq ...\geq q_{n}(G) $ be the eigenvalues of the $Q$-matrix of $G$, also known as the signless Laplacian of $G.$ In this paper we give a necessary and sufficient condition for the equality $q_{k}(G) =n-2,$ where $1
description: This version fills a gap in one proof, noticed by Rundan Xing
Preference for Novelty and Price Behaviour
Creators: name: Bertarelli, Silvia
name: Censolo, Roberto
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/01 Economia politica

description: In this paper we motivate a specific formulation for preference that exhibits both love for variety and love for novelty. This enables to investigate the effects of ageing of imperfect substitutes, as they became progressively old-fashioned, due to the obsolescence of their aesthetic features. First, we assume that the industry is divided into several sub-markets, each dominated by a single firm that produces a variety of a given vintage. We show that equilibrium prices decrease, as goods become older. Assuming a fixed cost to be paid, the evolution of demand determines the equilibrium number of varieties at the point where the oldest vintage firm earns zero profits. Second, we consider the model under a free entry condition assumption. Each sub-market of a given vintage is saturated with a number of varieties such that the market share of each firm is barely sufficient to realise zero profits. We show in a particular case that, in equilibrium, markets of the youngest varieties are characterised by a larger number of firms than markets offering older varieties. More specifically, the lifetime horizon of each variety will be characterised by decreasing prices accompanied by increasing demand levels.
A two-sector model of the business cycle: a preliminary analysis
Creators: name: Gozzi, Giancarlo
name: Nardini, Franco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-S/06 Metodi matematici dell'economia e delle scienze attuariali e finanziarie

description: In this paper a two-sector dynamic model of business fluctuations is presented. It is a disequilibrium dynamic model with two laws of evolution (dynamic laws) built into it: prices of commodities change according to the market disequilibrium of supply and demand, while quantities change according to the stock disequilibrium and the shifting of the degree of utilization of productive capacity away from its target value. Investment by firms is modelled by a nonlinear accelerator. Non linearity in the investment function makes the equilibria of the model unstable and causes growing disproportionalities between the two sectors; business fluctuations are the outcome of the switching of the system to a different regime that allows to reduce the existing disproportionality. The different regimes into which the economy may be found are a situation of overheating and one of depression. A fundamental role in the switching of the economy is played by two crucial features of the capital good sector: its limited productive capacity and the time-lag required to increase it.
Mechanism of Molecular Orientation by Single-cycle Pulses
Creators: name: Ortigoso, Juan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Significant molecular orientation can be achieved by time-symmetric single-cycle pulses of zero area, in the THz region. We show that in spite of the existence of a combined time-space symmetry operation, not only large peak instantaneous orientations but also nonzero time-average orientations over a rotational period can be obtained. We show that this unexpected phenomenon is due to interferences among eigenstates of the time-evolution operator, as was described previously for transport phenomena in quantum ratchets. This mechanism also works for sequences of identical pulses, spanning a rotational period. This fact can be used to obtain a net average molecular orientation regardless of the magnitude of the rotational constant.
description: Published version may be found at (URL:http://link.aip.org/link?/JCP/137/044303). Substantial changes with respect to previous versions, including new title
Existence and large time behaviour for a stochastic model of a modified magnetohydrodynamic equations
Creators: name: Razafimandimby, Paul Andre
name: Sango, Mamadou
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we initiate the mathematical analysis of a system of nonlinear Stochastic Partial Differential equations describing the motion of turbulent Non-Newtonian media in the presence of fluctuating magnetic field. The system is basically obtained by a coupling of the dynamical equations of a Non-Newtonian fluids having $p$-structure and the Maxwell equations. We mainly show the existence of weak martingale solutions and their exponential decay when time goes to infinity.
description: This paper needs some revision
Adaptives Online-Tuning für kontinuerliche Zustandsräume
Creators: name: Kopf, Timo
Publisher: name: Karlsruhe
Year: 2018
Subjects: Raytracing
Auto-Tuner libtuning

description: Raytracing ist ein rechenintensives Verfahren zur Erzeugung photorealistischer Bilder. Durch die automatische Optimierung von Parametern, die Einfluss auf die Rechenzeit haben, kann die Erzeugung von Bildern beschleunigt werden. Im Rahmen der vorliegenden Arbeit wurde der Auto-Tuner libtuning um ein generalisiertes Reinforcement Learning-Verfahren erweitert, das in der Lage ist, bestimmte Charakteristika der zu zeichnenden Frames bei der Auswahl geeigneter Parameterkonfigurationen zu berücksichtigen. Die hierfür eingesetzte Strategie ist eine ε -gierige Strategie, die für die Exploration das Nelder-Mead-Verfahren zur Funktionsminderung aus libtuning verwendet. Es konnte gezeigt werden, dass eine Beschleunigung von bis zu 7,7 % in Bezug auf die gesamte Rechenzeit eines Raytracing-Anwendungsszenarios dieser Implementierung gegenüber der Verwendung von libtuning erzielt werden konnte.
Detection of a radio bridge in Abell 3667
Creators: name: Carretti, E.
name: Brown, S.
name: Staveley-Smith, L.
name: Malarecki, J. M.
name: Bernardi, G.
name: Gaensler, B. M.
name: Haverkorn, M.
name: Kesteven, M. J.
name: Poppi, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have detected a radio bridge of unpolarized synchrotron emission connecting the NW relic of the galaxy cluster Abell 3667 to its central regions. We used data at 2.3 GHz from the S-band Polarization All Sky Survey (S-PASS) and at 3.3 GHz from a follow up observation, both conducted with the Parkes Radio Telescope. This emission is further aligned with a diffuse X-ray tail, and represents the most compelling evidence for an association between intracluster medium turbulence and diffuse synchrotron emission. This is the first clear detection of a bridge associated both with an outlying cluster relic and X-ray diffuse emission. All the indicators point toward the synchrotron bridge being related to the post-shock turbulent wake trailing the shock front generated by a major merger in a massive cluster. Although predicted by simulations, this is the first time such emission is detected with high significance and clearly associated with the path of a confirmed shock. Although the origin of the relativistic electrons is still unknown, the turbulent re-acceleration model provides a natural explanation for the large-scale emission. The equipartition magnetic field intensity of the bridge is B_eq = 2.2 +/- 0.3 μG. We further detect diffuse emission coincident with the central regions of the cluster for the first time.
description: 10 pages, 16 figures, accepted for publication on MNRAS. Replaced with the version accepted for publication: also the 3.3 GHz image cleaned from compact sources; 8 more figures; details on data reduction and compact source cleaning added; new estimate of the magnetic field. Some figures at resolution lower than the original ones
Die Entwicklung der Schnellschnittdiagnostik im Vergleich der Jahrgänge 1977, 1987, 1997, dargestellt am Beispiel der Institute für Pathologie in Cottbus, Gelsenkirchen und Görlitz
Creators: name: Lang, Michael Reimar
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2006
Subjects: subject: Elektronische Publikation
subject: Hochschulschrift
subject: Online-Publikation
subject: Zsfassung in engl. Sprache
subject: 616.075

description: Ziel der Dissertation war die Erhebung und Auswertung statistischer Daten auf der Grundlage durchgeführter Schnellschnittuntersuchungen in drei ausgewählten Jahrgängen (1977, 1987, 1997) in den Instituten für Pathologie in Cottbus, Gelsenkirchen und Görlitz. Es wurden Indikationsgruppen "Mammaschnellschnitte", "Urogenitalsystem", "Hals - Nasen - Ohrenheilkunde", "Abdomen", "Schilddrüse", "Lymphknoten" und "sonstige Indikation", erstellt. Spezifität, Sensitivität und Korrektheit wurden untersucht. 4.587 Schnellschnittbefunde wurden analysiert. ("Mammaschnellschnitte" 3.135 Untersuchungen, "Urogenitalsystem" 532, "Abdomen" 255, "Hals - Nasen - Ohrenheilkunde" 207, "Lymphknoten" 202, "Schilddrüse" 118 und aus "sonstiger Indikation" 136 Schnellschnitte). Die Anzahl der Mammaschnellschnitte war im Vergleich von 1987 und 1997 rückläufig, die anderen Indikationen nahmen an Bedeutung zu. Im Jahrgang 1987 gab es wesentliche Unterschiede im Indikationsprofil und der Struktur der Indikationsgruppe "Mammaschnellschnitte" zwischen dem Institut in Gelsenkirchen auf der einen und den Instituten in Cottbus und Görlitz auf der anderen Seite. Diese waren 1997 nicht mehr nachweisbar. Die Schnellschnittuntersuchungen wurden zunehmend zur Qualitätssicherung , beispielsweise zur Beurteilung des Tumorrandes, zuverlässig eingesetzt.
description: The subject of that dissertation was the evaluation and characterization of frozen section diagnosis in 1977, 1987, 1997 and in the Institutes of Pathology in Cottbus, Gelsenkirchen and Görlitz.. The indications group "mamma", "urogenital system", "Otorhinolaryngology ", "Gastroenterology", "thyroid gland", "lymph nodes" and "other indication", were formed and specifity, sensitivity and accuracy determined. 4.587 Results of frozen section determinations were analyzed. ("mamma" 3.135, "urogenital system" 532, "Gastroenterology" 255, "Otorhinolaryngology " 207, "lymph nodes" 202, "thyroid gland" 118 and "other indication" 136 frozen sections). The number of frozen sections of the mamma decreases from 1987 to 1997. Other Indications become more important. In 1987 there were important differences in the profile of indication and the structure of the indications group "mamma" between the institutes in Gelsenkirchen on the one side and the institutes in Cottbus und Görlitz on the other side. In 1997 these differences were never detectable. The role of frozen section examinations is changing. The frozen section examination is a safe tool for a high quality in surgical therapy of malignant diseases.
Economic Growth in Mozambique? An Assessment
Creators: name: Ardeni, Pier Giorgio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1999
Subjects: SECS-P/01 Economia politica

description: In this paper we try to assess the nature, size and consistency of recent economic growth in Mozambique. We attempt to verify whether and to what extent this growth is unprecedented as has been claimed. We look at the available data to assess whether this growth is even across sectors and GDP components. Finally we try to assess whether by any indication we can say if observed growth is balanced and, if not, to what extent economic policy is actually responsible. We argue that economic growth in Mozambique still appears to be out of balance, weak, uneven, and unsustainable, calling for a re-orientation of economic policy able to guarantee a more balanced and even growth across the economy. We also argue that, as a stable and steady economic growth is not warranted, Government action should be inspired to broaden its sets of instruments and goals, and that international agencies and donors should help it adopt the consequent policies. The spiral of debt, aid and conditionality certainly cripples Mozambique’s Government autonomy, but it is only by broadening its sets of instruments and goal that Mozambique’s economy will embark on a sustainable growth path.
Canuschiza Lacroix 1999
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Canuschiza

description: Canuschiza Lacroix, 1999a
[10 species].
Type species Canuschiza insularis Lacroix, 1999, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Muller's ratchet with compensatory mutations
Creators: name: Pfaffelhuber, P.
name: Staab, P. R.
name: Wakolbinger, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: We consider an infinite-dimensional system of stochastic differential equations describing the evolution of type frequencies in a large population. The type of an individual is the number of deleterious mutations it carries, where fitness of individuals carrying k mutations is decreased by αk for some α>0. Along the individual lines of descent, new mutations accumulate at rate λper generation, and each of these mutations has a probability γper generation to disappear. While the case γ=0 is known as (the Fleming-Viot version of) Muller's ratchet, the case γ>0 is associated with compensatory mutations in the biological literature. We show that the system has a unique weak solution. In the absence of random fluctuations in type frequencies (i.e., for the so-called infinite population limit) we obtain the solution in a closed form by analyzing a probabilistic particle system and show that for γ>0, the unique equilibrium state is the Poisson distribution with parameter λ/(γ+α).
description: Published in at http://dx.doi.org/10.1214/11-AAP836 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The Dissecting Power of Regular Languages
Creators: name: Yamakami, Tomoyuki
name: Kato, Yuichi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: A recent study on structural properties of regular and context-free languages has greatly promoted our basic understandings of the complex behaviors of those languages. We continue the study to examine how regular languages behave when they need to cut numerous infinite languages. A particular interest rests on a situation in which a regular language needs to "dissect" a given infinite language into two subsets of infinite size. Every context-free language is dissected by carefully chosen regular languages (or it is REG-dissectible). In a larger picture, we show that constantly-growing languages and semi-linear languages are REG-dissectible. Under certain natural conditions, complements and finite intersections of semi-linear languages also become REG-dissectible. Restricted to bounded languages, the intersections of finitely many context-free languages and, more surprisingly, the entire Boolean hierarchy over bounded context-free languages are REG-dissectible. As an immediate application of the REG-dissectibility, we show another structural property, in which an appropriate bounded context-free language can "separate with infinite margins" two given nested infinite bounded context-free languages.
description: A4, 10pt, 9 pages, 2 figures
Multiple abiotic changes and species interactions mediate responses to climate change on rocky shores
Creators: name: Gooding, Rebecca Ann
Publisher: name: University of British Columbia
Year: 2013

description: Anthropogenic climate change poses a serious threat to biodiversity. Accurate predictions of the ecological consequences of future abiotic change will require a broad perspective that takes into account multiple climate variables, species-specific responses, and intra- and interspecific dynamics. I addressed these issues in the context of a marine rocky intertidal community to determine how abiotic and biotic factors can mediate the effects of climate change. I began with two studies on the organismal-level effects of multiple abiotic variables. In the first study, I found that acute exposure to low salinity reduced the survival of littorine snails facing thermal stress, but that ocean acidification (OA) had no such effect. In a second study, I showed that sustained exposure to increased temperature and OA had positive and additive effects on the growth and feeding of the purple ochre sea star. These findings demonstrate that studies of multiple climate variables will be important not only to identify additive and non-additive effects, but also to determine which climate variables will be detrimental for a given species. Next, I measured how species-specific responses to climate change can alter species interactions. By quantifying the effects of body size on the feeding behaviours of sea stars preying on mussels, I demonstrated that climate-driven changes in body size can have profound impacts on the strength of this interaction. Finally, I investigated how population-level responses to multiple abiotic variables can be affected by the presence of an interacting species. I built a predator-prey model that simulates the ecologically important interaction between the purple ochre sea star and its preferred prey, mussels. Using empirical estimates of sea star and mussel responses to increased temperature and OA, I simulated their interaction under various climate scenarios. I found that predation exacerbated the effects of climate change on mussel populations, and that climate change increased the strength of the sea star-mussel interaction. My work demonstrates that the effects of climate change will likely be mediated by a combination of biotic and abiotic factors, and that these factors should be considered when making predictions about the ecological consequences of climate change.
Investor risk aversion and financial fragility in emerging economies
Creators: name: Nilsen, Jeffrey H.
name: Rovelli, Riccardo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/01 Economia politica

description: Bank intermediated short-term capital inflows play a crucial role in the financial structure of many emerging economies. Yet since these funds are subject to the risk of early withdrawal, an excessive reliance on this financing is often associated with a financial or currency crisis. We model a situation where withdrawals are motivated by a change in either the domestic or foreign fundamentals. We show that, for a given change in fundamentals, a sudden reversal in the capital flows, and hence a financial crisis, is more likely the more risk averse are the foreign investors. We also show that a policy to tax early withdrawals may discourage the inflows more likely to cause fundamental runs, as it prevents the relatively more risk averse investors from investing. However, the policy must be fine-tuned to avoid discouraging all capital inflows.
Extending spin ice concepts to another geometry: the artificial triangular spin ice
Creators: name: Mól, L. A. S.
name: Pereira, A. R.
name: Moura-Melo, W. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work we propose and study a realization of an artificial spin ice-like system, not based on any real material, in a triangular geometry. At each vertex of the lattice, the "ice-like rule" dictates that three spins must point inward while the other three must point outward. We have studied the system's ground-state and the lowest energy excitations as well as the thermodynamic properties of the system. Our results show that, despite fundamental differences in the vertices topologies as compared to the artificial square spin ice, in the triangular array the lowest energy excitations also behave as a kind of Nambu monopoles (two opposite monopoles connected by an energetic string). Indeed, our results suggest that the monopoles charge value may have a universal value while the string tension could be tuned by changing the system's geometry, probably allowing the design of systems with different string tensions. Our Monte Carlo results suggest a phase transition in the Ising universality class where the mean distance between monopoles and anti-monopoles increases considerably at the critical temperature. The differences on the vertices topologies seem to facilitate the experimental achievement of the system's ground-state, thereby allowing a more detailed experimental study of the system's properties.
description: This new version of the paper includes all changes described in the erratum published at PRB 86, 219902(E) (2012) (http://dx.doi.org/10.1103/PhysRevB.86.219902)
Towards practical classical processing for the surface code
Creators: name: Fowler, Austin G.
name: Whiteside, Adam C.
name: Hollenberg, Lloyd C. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The surface code is unarguably the leading quantum error correction code for 2-D nearest neighbor architectures, featuring a high threshold error rate of approximately 1%, low overhead implementations of the entire Clifford group, and flexible, arbitrarily long-range logical gates. These highly desirable features come at the cost of significant classical processing complexity. We show how to perform the processing associated with an nxn lattice of qubits, each being manipulated in a realistic, fault-tolerant manner, in O(n^2) average time per round of error correction. We also describe how to parallelize the algorithm to achieve O(1) average processing per round, using only constant computing resources per unit area and local communication. Both of these complexities are optimal.
description: 5 pages, 6 figures, published version with some additional text
Simultaneous measurability of error and disturbance
Creators: name: Mochizuki, Riuji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The uncertainty relation, which displays an elementary property of quantum theory, was originally described by Heisenberg as the relation between error and disturbance. Ozawa presented a more rigorous expression of the uncertainty relation, which was later verified experimentally. Nevertheless, the operators corresponding to error and disturbance should be measurable in the identical state if we follow the presupposition of Heisenberg's thought experiment. In this letter, we discuss simultaneous measurability of error and disturbance and present a new inequality using error and disturbance in the identical state. A testable example of this inequality is also suggested.
description: A testable example is added
Code for: Multifaceted environmental and latitudinal influences on vertebrate population genetic diversity across the Americas
Creators: name: Lawrence, Elizabeth R
name: Fraser, Dylan J.
Publisher: name: figshare
Year: 2021
Subjects: subject: 60207 Population Ecology
subject: FOS: Biological sciences
subject: 60411 Population, Ecological and Evolutionary Genetics

description: Code used for producing the results presented in Weak latitudinal and environmental influences on vertebrate population genetic diversity across the Americas, submitted to PNAS.
Entwicklung stereospezifischer HPLC- und Kapillarelektrophorese-Techniken für die pharmakokinetische Anwendung
Creators: name: Ullrich, Thomas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2001
Subjects: Elektronische Publikation
Hochschulschrift
Zsfassung in engl. Sprache

description: Die präzise Bestimmung der Arzneimittelkonzentration in biologischen Flüssigkeiten ist für die Pharmakologie von grundlegender Bedeutung. Bei als Razemate verabreichten Arzneimitteln spielt die stereospezifische Analytik für die Beschreibung stereoselektiver Prozesse im Organismus eine wesentliche Rolle. Ziel der Forschungsarbeiten war die spurenanalytische Enantiomeren-Bestimmung des Sympathikomimetikums Fenoterol, das in der Medizin als Antiasthmatika und Tokolytika eingesetzt wird, für pharmakokinetische Untersuchungen. Es konnte eine Methode zur Bestimmung der Enantiomeren von zahlreichen therapeutisch relevanten Aminoalkoholen mittels HPLC und Vorsäulen-Derivatisierung entwickelt werden. Dabei reagierte Naphthylisocyanat mit den racemischen Aminoalkoholen zu Harnstoff-Derivaten, die auf einer Cellulose tris(3,5-dimethylphenylcarbamat)-Säule getrennt und fluorimetrisch bis in den unteren ng/mL-Bereich detektiert werden konnten. Im Falle von Fenoterol wurden die notwendigen Extraktions- und Derivatisierungsschritte optimiert. Ohne vorherige Derivatisierung gelang die chirale kapillarelektrophoretische Trennung von Fenoterol bei Einsatz von β-Cyclodextrin-Derivaten.
description: Precise determination of drug concentrations in biological fluids is essential for pharmacological studies. In addition, with drugs administered as racemic mixtures a stereospecific analytical approach is needed in order to describe stereoselective processes in living organisms. This research focused on developing a forensic method to determine the enantiomer concentrations of the sympathicomimethic fenoterol which is frequently used in therapy as an antiasthmathic and as a tocolytic in pharmacokinetic studies. A method for determining the enantiomers of various therapeutically relevant aminoalcohols using HPLC and precolumn derivatization has been developed. Naphthyl isocyanate reacted with racemic aminoalcohols to form urea derivatives which were separated on a cellulose tris(3,5-dimethylphenylcarbamate) coated silica gel column, and detected fluorometrically in the lower ng mL-1 range. Concerning fenoterol extraction and derivatization, steps of necessity were optimized. Chiral capillary electrophoretic separation of fenoterol without derivatization was successful using β-cyclodextrin derivatives.
Proofs of two conjectures of Kenyon and Wilson on Dyck tilings
Creators: name: Kim, Jang Soo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A19, 05A05

description: Recently, Kenyon and Wilson introduced a certain matrix $M$ in order to compute pairing probabilities of what they call the double-dimer model. They showed that the absolute value of each entry of the inverse matrix $M^{-1}$ is equal to the number of certain Dyck tilings of a skew shape. They conjectured two formulas on the sum of the absolute values of the entries in a row or a column of $M^{-1}$. In this paper we prove the two conjectures. As a consequence we obtain that the sum of the absolute values of all entries of $M^{-1}$ is equal to the number of complete matchings. We also find a bijection between Dyck tilings and complete matchings.
description: 18 pages, 9 figures
Price vs Quantity in a Repeated Differentiated Duopoly
Creators: name: Lambertini, Luca
name: Schultz, Christian
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/01 Economia politica

description: We investigate the choice of market variable, price or quantity, of an opti-mal implicit cartel. If the discount factor is high, the cartel can realize the monopoly profit in both cases. Otherwise, it is optimal for the cartel to rely on quantities in the collusive phase if goods are substitutes and prices if goods are complements. The reason is that this minimizes the gains from deviations from collusive play.
Anartioschiza Kolbe 1894
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Anartioschiza

description: Anartioschiza Kolbe, 1894
[18 species and 1 additional subspecies].
Type species Anartioschiza camaruna Kolbe, 1894, by subsequent designation of Lucas (1920).
Note: Sharp (1894) incorrectly spelt Anartioschiza as “ Antartioschiza ”.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on pages 132-133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Is subsidizing entry an optimal policy?
Creators: name: Saltarelli, Enrico
name: Vivarelli, Marco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/02 Politica economica

description: Public subsidies in support of new firm foundation are among the most frequently used instruments of industrial policy in the Euro zone. This paper analyses their effectiveness and efficiency vis-à-vis some features of the overall process of industry dynamics in Italian manufacturing. To this end, the survival and growth patterns of new small firms are investigated using a unique dataset on electrical and electronic engineering in Italy. As regards survival, our results confirm the findings of other studies, namely that the hazard rates are particularly high in the early stages of firm’s life cycle. As far as growth is concerned, the study’s main finding is that Gibrat’s Law fails to hold in the years immediately following start-up, when smaller firms must ‘rush’ in order to achieve a size large enough to enhance their likelihood of survival; conversely, in later stages of firm’s life cycle the Law cannot be rejected. These results radically question the use of subsidies as an optimal policy for the support of new entries, since the subsidy brings about a major bias in the process of market selection (including substitution and deadweight effects) and hampers the post-entry scale adjustment of newborn firms.
Delegation vs Cost-Reducing R&D in a Cournot Duopoly
Creators: name: Lambertini, Luca
name: Primavera, Gabriele
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/01 Economia politica

description: We describe a duopoly model where stockholders assess the relative profitability of delegation versus process innovation. Delegation may not be a dominant strategy. When it is, the game is not necessarily a prisoners’ dilemma. Our model yields several equilibria where at least one firm remains entrepreneurial and finds it preferable to undertake cost-reducing R&D activities. Then, we introduce the possibility of using delegation and cost-reducing R&D jointly. The use of R&D investment by entrepreneurial firms is a dominated strategy, so that firms always separate ownership from control, while they don’t necessarily combine delegation with process innovation.
Biosynthesis and function of hydroxycinnamic acid amides in flowers of Arabidopsis thaliana - [kumulative Dissertation]
Creators: name: Fellenberg, Christin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2013
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 572.2
subject: 570

description: Hydroxyzimtsäureamide (HCAAs) sind universelle pflanzliche Sekundärmetabolite, welche in vielen Pflanzenspezies nachgewiesen wurden. Obwohl sie bereits zahlreich beschrieben wurden und ihre chemische Struktur gut untersucht ist, war die HCAA Biosynthese, deren Regulation und physiologische Funktion in Pflanzen lange unklar. In Arabidopsis thaliana wurde das Vorkommen von HCAAs vor kurzem in Samen, Knospen und Pollen beschrieben. Die Identifizierung einer kationenabhängigen O-Methyltransferase (AtTSM1) im Tapetum der Staubblätter, ermöglichte den Nachweis weiterer HCAA synthetisierender Enzyme und deren kodierende Gene. Die Analyse entsprechender knockout Mutanten und Lokalisierungsstudien ergaben einen tapetum-spezifischen Stoffwechselweg, welcher in einer Vielfalt von HCAAs resultiert, die einen wesentlichen Bestandteil des Pollenkits darstellen. Die Biosynthese dieser HCAAs wird durch ein Zusammenspiel von je zwei Cytochrom P450 Hydroxylasen, Hydroxyzimtsäure- und Methyltransferasen generiert. Massenspektrometrische Analysen des A. thaliana Pollens ermöglichten zudem die Identifizierung 38 unterschiedlicher Hydroxyzimtsäure-Spermdinkonjugate. Gegenwärtig bleibt die biologische Funktion der HCAAs als Bestandteil der Pollenoberfläche, sowie eine Beteiligung an der Toleranz des männlichen Gametophyten gegen biotische und abiotische Stressoren, jedoch weiterhin rätselhaft.
description: Hydroxycinnamic acid amides (HCAAs) are a diverse group of plant secondary metabolites known from many higher plants. Although their highly variable chemical structures have been analyzed and their distributions in different plant organs have been described, HCAA biosynthesis, its regulation, and the physiological role of individual compounds remain largely unknown. Their presence in Arabidopsis thaliana has been established in seeds, flower buds and pollen grains. Annotation and location of a cation-dependent O-methyltransferase (AtTSM1) specifically in the tapetum of the anther resulted in the subsequent identification of several genes with a putative role in HCAA biosynthesis. Based on corresponding A. thaliana knockout mutants and localization studies, a tapetum specific pathway required for HCAA-deposition on the surface of pollen grains was proposed. This involves two methylation steps, catalyzed by two different cation-dependent O-methyltransferases, two cytochrome P450 enzymes dependent hydroxylation steps, and a conjugating acyl transfer performed by two BAHD-like hydroxycinnamate (HCA)-acyltransferases. Profiling of HCAAs on pollen grains by tandem mass spectrometry enabled the identification of at least 38 different spermidine conjugates in wild type pollen. The resulting metabolic plasticity appears as an important, yet poorly understood factor in biotic and abiotic stress tolerance of the male gametophyte.
Obstructions for constructing equivariant fibrations
Creators: name: İlhan, Aslı Güçlükan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57S25, 55R91

description: Let $G$ be a finite group and $\mathcal{H}$ be a family of subgroups of $G$ which is closed under conjugation and taking subgroups. Let $B$ be a $G$-$CW$-complex whose isotropy subgroups are in $\mathcal{H}$ and let $\mathcal{F}= \{F_H\}_{H \in \mathcal{H}}$ be a compatible family of $H$-spaces. A $G$-fibration over $B$ with fiber $\mathcal{F}= \{F_H\}_{H \in \mathcal{H}}$ is a $G$-equivariant fibration $p:E \rightarrow B$ where $p^{-1}(b)$ is $G_b$-homotopy equivalent to $F_{G_b}$ for each $b \in B$. In this paper, we develop an obstruction theory for constructing $G$-fibrations with fiber $\mathcal{F} $ over a given $G$-$CW$-complex $B$. Constructing $G$-fibrations with a prescribed fiber $\mathcal{F}$ is an important step in the construction of free $G$-actions on finite $CW$-complexes which are homotopy equivalent to a product of spheres.
Joint decisions on household membership and human capital accumulation of youths: The role of expected earnings and labour market rationing
Creators: name: Giannelli, Gianna Claudia
name: Monfardini, Chiara
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: SECS-P/02 Politica economica

description: This paper focuses on the youth’s decisions on household formation and human capital investment - in further education or work experience - and the factors influencing these choices. While previous studies limited their analyses to decisions concerning the living arrangements and the labour market, the choice set is extended here to take into account other alternatives. The decisions of either remaining in the parental household or going to live with a partner are modelled jointly with those of either entering the labour market (i.e. investing in work experience) or investing in higher (university) education. Using the Bank of Italy 1995 Sample Survey on Italian Households, a multinomial probit model estimates the probabilities of the different pairs of outcomes. The results highlight the crucial role of economic variables in shaping young adults’ decisions. Among these, expected lifetime earnings from attending university have the most important impact on the choice of studying and coresiding. Implications for policy stem from the estimated impact of housing and labour market performance variables on young adults’ decisions. In particular, a sizeable discouraged worker effect, inducing young people to study when the local unemployment rate is high, is detected. The effect of the cost of housing in delaying young workers’ decisions to leave the parental home and form a new household is also remarkable. Two policy experiments are presented. The former measures the impact of housing policies targeted at reducing housing cost on the probability of marriage. The latter measures the extent to which labour policies targeted at reducing youth unemployment would decrease the number of discouraged workers that choose to study.
Anisotropic Bianchi-I Cosmological Models in String Cosmology with Variable Deceleration Parameter
Creators: name: Chawla, Chanchal
name: Mishra, R. K.
name: Pradhan, Anirudh
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The present study deals with spatially homogeneous and anisotropic Bianchi-I cosmological model representing massive strings. The energy-momentum tensor, as formulated by Letelier (Phys. Rev. D 28: 2414, 1983) has been used to construct massive string cosmological model for which we assume that the expansion scalar in the model is proportional to one of the components of shear tensor. The Einstein's field equations have been solved by considering time dependent deceleration parameter which renders the scale factor $a = (\sinh(αt))^{\frac{1}{n}}$, where $α$ and $n$ are constants. It has been detected that, for $n > 1$, the presented model has a transition of the universe from the early decelerated phase to the recent accelerating phase at present epoch while for $0 < n \leq 1$, this describes purely accelerating universe which is consistent with recent astrophysical observations. Moreover, some physical and geometric properties of the model along with physical acceptability of the solutions have been also discussed in detail.
description: 14 pages, 8 figures. Minor changes and added some new matters. arXiv admin note: text overlap with arXiv:1010.0681 by other authors