cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Photon-Dominated Chemistry in the Nucleus of M82: Widespread HOC+ emission in the inner 650 pc disk
Creators: name: Fuente, A.
name: Garcia-Burillo, S.
name: Gerin, M.
name: Teyssier, D.
name: Usero, A.
name: Rizzo, J. R.
name: de Vicente, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The nucleus of M82 has been mapped in several 3mm and 1mm lines of CN, HCN, C2H, c-C3H2, CH3C2H, HC3N and HOC+ using the IRAM 30m telescope. These species have been purposely selected as good tracers of photon-dominated chemistry. We have measured [CN]/[HCN] ~ 5 in the inner 650 pc galaxy disk. Furthermore, we have detected the HOC+ 1--0 line with an intensity similar to that of the H13CO+ 1--0 line. This implies a [HCO+]/[HOC+] ratio of ~40. These results corroborate the existence of a giant photo-dissociation region (PDR) in the nucleus of M82. In fact, the low [HCO+]/[HOC+] ratio can only be explained if the nucleus of M82 is formed by small (r<0.02-0.2 pc) and dense (n ~ a few 10^4--10^5 cm^{-3}) clouds immersed in an intense UV field (G_0 ~ 10^4 in units of the Habing field). The detection of the hydrocarbons c-C3H2 and CH3C2H in the nucleus of M82 suggests that a complex carbon chemistry is developing in this giant PDR.
description: 4 pages, 2 figs
Irregular Dynamics in a Solvable One-Dimensional Quantum Graph
Creators: name: Hejcik, Pavel
name: Cheon, Taksu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We show that the quantum single particle motion on a one-dimensional line with Fulop-Tsutsui point interactions exhibits characteristics usually associated with nonintegrable systems both in bound state level statistics and scattering amplitudes. We argue that this is a reflection of the underlying stochastic dynamics which persists in classical domain.
description: 4 pages ReVTeX with 3 figures. Full analytical expressions for both T_N(k) and R_N(k) are included, with revised Figures
Exothermic Dark Matter for XENON1T Excess
Creators: name: Lee, Hyun Min
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by the recent excess in the electron recoil from XENON1T experiment, we consider the possibility of exothermic dark matter, which is composed of two states with mass splitting. The heavier state down-scatters off the electron into the lighter state, making an appropriate recoil energy required for the Xenon excess even for the standard Maxwellian velocity distribution of dark matter. Accordingly, we determine the mass difference between two component states of dark matter to the peak electron recoil energy at about $2.5\,{\rm keV}$ up to the detector resolution, accounting for the recoil events over $E_R=2-3\,{\rm keV}$, which are most significant. We include the effects of the phase-space enhancement and the atomic excitation factor to calculate the required scattering cross section for the Xenon excess. We discuss the implications of dark matter interactions in the effective theory for exothermic dark matter and a massive $Z'$ mediator and provide microscopic models realizing the required dark matter and electron couplings to $Z'$.
description: 22 pages, 3 figures, v2: References added and typos corrected. Discussion on two-photon decay mode of dark matter added; v3: Dark matter decoupling clarified, discussion expanded on the recoil energy with electron velocity included, and figures added. Accepted to JHEP
Remote Surgery at Scale
Creators: name: Rao, Mathusha
name: Wang, Stanley
name: Lim, Nathaniel
name: Tejeda, Jesus
Publisher: name: Stanford Digital Repository
Year: 2025
Subjects: subject: Robotic Surgery
subject: Medical Robotics

description: As robotic-assisted surgery (RAS) advances, expanding its capabilities to support remote operation remains a critical and underdeveloped frontline. Our team (USR) was challenged to reimagine the robotic surgery interface for remote teleoperated procedures without compromising safety, ergonomics, or core functionalities of existing systems. Current robotic surgery platforms like the Da Vinci system are stationary, expensive, and lack personalization—factors that hinder broader adoption and accessibility, particularly for remote or collaborative use cases.
Through extensive need finding, we conducted interviews with nine surgeons across various specialties and levels of RAS experience. The findings revealed that while robotic surgery is often preferred for its precision and ergonomics, challenges such as lack of haptic feedback, limited camera control, poor communication with bedside teams, and the infeasibility of full remote surgery persist. However, opportunities emerged around remote training and collaborative surgery, where a secondary expert could assist in real time from a distance, provided a qualified surgeon is still present in the operating room.
In response, the team developed a functional prototype system centered around three pillars: surgeon-specific ungrounded grippers, a collapsible and portable vision-based tracking system, and an ergonomic centric workspace called Manipulo. It integrates capacitive sensing, RFID-based personalization, intuitive clutch mechanisms, and a quad-camera vision setup to allow precise 3D hand tracking. The system prioritizes user comfort, modularity, and safety, with a low-latency response and support for natural bimanual manipulation.
This winter effort establishes a robust platform to support future development in remote surgical collaboration, offering an adaptable and scalable solution that can extend the reach and accessibility of robotic surgery.
Indigenous spectres, subversive Lilas : encounters between Nawabi authority, colonialism and popular ritual in Lucknow
Creators: name: Gill, Rajdeep Singh
Publisher: name: University of British Columbia
Year: 2009

description: The constructions of religion and ritual have been central to constituting a colonial vision of India and The Holi Festival at Lucknow is an important and early visual site of this dynamic and history. This small watercolor painting was completed in the late eighteenth and early nineteenth century, an intense and conflicted period in which the rulers of Awadh and their negotiations of self and sovereignty had to contend with the forceful power/knowledge nexus of colonialism. I argue that The Holi Festival at Lucknow draws upon the vocabularies of the picturesque and the sublime for a construction of knowledge that would be instrumental in justifying colonization. I illustrate the ways in which such a colonial project is an anxious one, continually put into crisis by how kingship is negotiated in Awadh. Specifically, I employ caste, a key colonial trope for othering and homogenizing India, as an important and intricate site for the Nawabi brokering of power. Caste, marked by contesting Shia Nawabi and colonial constructions, is further destabilized by the proliferating, rebellious and resistant identities that it attempts to domesticate. These identities have to negotiate other dominant narratives, such as the colonial discourse on "criminality", and I explore these negotiations in relation to subaltern histories and memories. This theoretical position works to hybridize from below the visual terrain of colonial modernity and productively allows the dense sites of resistances to be brought out; thus, in my textured reading, The Holi Festival at Lucknow emerges as a multifaceted site of social struggles. I position these struggles within a social arena in which divinity, asceticism, labor, gender, class, caste and adivasi-ness weave in and out of each other in several directions. This complex arena is mapped in my thesis through visual analysis of The Holi Festival at Lucknow and its relationship to other discursive practices. Significantly, I also develop how lila, bhakti and Sufism, as social practices inhabiting the discursive spaces of the image, allow rethinking of agency and subjecthood in a manner that critiques the modern-historical imagining of time/space as only singular and secular.
Local Density of States and Order Parameter Configurations in Layered Ferromagnet-Superconductor Structures
Creators: name: Halterman, Klaus
name: Valls, Oriol T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We analyze the local density of states (LDOS) of heterostructures consisting of alternating ferromagnet, $F$, and superconductor, $S$, layers. We consider structures of the $SFS$ and $SFSFSFS$ type, with thin nanometer scale $F$ and $S$ layers, within the ballistic regime. The spin-splitting effects of the ferromagnet and the mutual coupling between the $S$ regions, yield several nontrivial stable and metastable pair amplitude configurations, and we find that the details of the spatial behavior of the pair amplitude govern the calculated electronic spectra. These are reflected in discernible signatures of the LDOS. The roles that the magnetic exchange energy, interface scattering strength, and the Fermi wavevector mismatch each have on the LDOS for the different allowed junction configurations, are systematically investigated.
description: 20 pages, 10 figures. Figures are screen captures, high resolution figures are available from either author
Atomic quantum simulator for lattice gauge theories and ring exchange models
Creators: name: Büchler, H. P.
name: Hermele, M.
name: Huber, S. D.
name: Fisher, Matthew P. A.
name: Zoller, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present the design of a ring exchange interaction in cold atomic gases subjected to an optical lattice using well understood tools for manipulating and controlling such gases. The strength of this interaction can be tuned independently and describes the correlated hopping of two bosons. We discuss a setup where this coupling term may allows for the realization and observation of exotic quantum phases, including a deconfined insulator described by the Coulomb phase of a three-dimensional U(1) lattice gauge theory.
description: 4 pages, 2 figures
title: Σύνθεση και χαρακτηρισμός παραγώγων του φουλερένιου
titleType: AlternativeTitle
title: Synthesis and characterization of fullerence derivatives
Creators: name: Michael, Aggelos K.
Publisher: name: National Technological University of Athens
Year: 2014
Subjects: Φουλερένιο
Σύνθεση
Φουλεροπυρολιδίνη
Τρινιτροφλουορενόνη
Χαρακτηρισμός
Fullerene
Synthesis
Fouleropyrolidinis
Trinifluorenone
Characterization

description: 60 σ.
description: The aim of this thesis was the synthesis and characterization of fullerene derivatives.More specifically has been the synthesis and characterization of two derivatives of fullerenes : C82H21N5O10 and C82H24N2O4 .Firstly held the preparation of a-amino acid which was used in subsequent cycloaddition reaction with the fullerene.Then after decarboxylation of alpha-amino acid is reacted with an aldehyde and fullerene in an organic solvent under heating (Prato’s reaction), resulting the synthesis of fouleropyrolidinis.Then took place the synthesis of 2-5-7- trinitrofluorenone-4-carboxylic acid, where this product is reacted with fouleropyrolidini and formed the derivative, C82H21N5O10. For the formation of the second derivative , C82H24N2O4, reaction took place between fouleropyrolidinis and flouorenonis-4-carboxylic acid. Then these two derivatives of fullerene characteristic withmass spectrometry and FT-IR spectomertry.
Multiple decorrelation and rate of convergence in multidimensional limit theorems for the Prokhorov metric
Creators: name: Pene, Francoise
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 37D. (Primary)

description: The motivation of this work is the study of the error term e_t^ε(x,ω) in the averaging method for differential equations perturbed by a dynamical system. Results of convergence in distribution for (\frac{e_t^ε(x,\cdot)}{\sqrtε})_{ε>0} have been established in Khas'minskii [Theory Probab. Appl. 11 (1966) 211-228], Kifer [Ergodic Theory Dynamical Systems 15 (1995) 1143-1172] and Pène [ESAIM Probab. Statist. 6 (2002) 33-88]. We are interested here in the question of the rate of convergence in distribution of the family of random variables (\frac{e_t^ε(x,\cdot)}{\sqrtε})_{ε>0} when εgoes to 0 (t>0 and x\inR^d being fixed). We will make an assumption of multiple decorrelation property (satisfied in several situations). We start by establishing a simpler result: the rate of convergence in the central limit theorem for regular multidimensional functions. In this context, we prove a result of convergence in distribution with rate of convergence in O(n^{-1/2+α}) for all α>0 (for the Prokhorov metric). This result can be seen as an extension of the main result of Pène [Comm. Math. Phys. 225 (2002) 91-119] to the case of d-dimensional functions. In a second time, we use the same method to establish a result of convergence in distribution for (\frac{e_t^ε(x,\cdot)}{\sqrtε})_{ε>0} with rate of convergence in O(ε^{1/2-α}) (for the Prokhorov metric).
description: Published at http://dx.doi.org/10.1214/009117904000000036 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Evolution of the Primordial Axial Charge across Cosmic Times
Creators: name: Boyarsky, A.
name: Cheianov, V.
name: Ruchayskiy, O.
name: Sobol, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate collisional decay of the axial charge in an electron-photon plasma at temperatures 10 MeV - 100 GeV. We demonstrate that the decay rate of the axial charge is first order in the fine-structure constant $Γ_{\rm flip}\propto αm_{e}^{2}/T$ and thus orders of magnitude greater than the naive estimate which has been in use for decades. This counterintuitive result arises through infrared divergences regularized at high temperature by environmental effects. The decay of axial charge plays an important role in the problems of leptogenesis and cosmic magnetogenesis.
description: 7 pages, 3 figures + Supplementary Material (3 pages)
On the continuity of local times of Borel right Markov processes
Creators: name: Eisenbaum, Nathalie
name: Kaspi, Haya
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60G15, 60J25, 60J55 (Primary)

description: The problem of finding a necessary and sufficient condition for the continuity of the local times for a general Markov process is still open. Barlow and Hawkes have completely treated the case of the Lévy processes, and Marcus and Rosen have solved the case of the strongly symmetric Markov processes. We treat here the continuity of the local times of Borel right processes. Our approach unifies that of Barlow and Hawkes and of Marcus and Rosen, by using an associated Gaussian process, that appears as a limit in a CLT involving the local time process.
description: Published at http://dx.doi.org/10.1214/009117906000000980 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: Инвестиционное проектирование
Creators: name: ELS IPR BOOKS
Publisher: name: Новосибирский государственный университет экономики и управления «НИНХ»
Year: 2020

description: В учебном пособии рассмотрены понятие, классификация и фазы инвестиционных проектов. Показана роль бизнес-плана в инвестиционном проектировании, рассмотрены методы оценки эффективности инвестиционных проектов и организация их финансирования, вопросы управления инвестиционным проектом и его рисками. Предназначено для магистрантов направления «Экономика» (магистерские программы «Экономика фирмы» и «Бухгалтерский учет и анализ в коммерческих организациях») и студентов направления «Менеджмент» (профиль «Управление человеческими ресурсами»).
Optimal control of spatial-dynamic processes: The case of biological invasions
Creators: name: Epanchin-Niell, Rebecca S.
name: Wilen, James E.
name: Epanchin-Niell, Rebecca S.
name: Wilen, James E.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Resource /Energy Economics and Policy
subject: invasive species
subject: spatial-dynamic processes
subject: spatial spread
subject: reaction-diffusion
subject: management
subject: cellular automaton
subject: eradication
subject: containment
subject: spatial control
subject: integer programming

description: This study examines the spatial nature of optimal bioinvasion control. We develop and parameterize a spatially explicit two-dimensional model of species spread that allows for differential control across space and time, and we solve for optimal control strategies. We find that the qualitative nature of optimal strategies depend in interesting ways on aspects of landscape and invasion geometry. For example, we show that reducing the extent of exposed invasion edge, through spread, removal, or strategically employing landscape features, can be an optimal strategy because it reduces long-term containment costs. We also show that optimal invasion control is spatially and temporally “forward-looking” in the sense that strategies should be targeted to slow the spread of an invasion in the direction of greatest potential long-term damages. These and other novel findings contribute to the largely nonspatial literature on optimally controlling invasions and to understanding control of spatial-dynamic processes in general.
Superalgebras from $p$-brane actions
Creators: name: Reimers, Daniel T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Two superalgebras associated with $p$-branes are the constraint algebra and the Noether charge algebra. Both contain anomalous terms which modify the standard supertranslation algebra. These anomalous terms have a natural description in terms of double complex cohomology of generalized forms. By retaining fermionic charges and allowing for gauge freedom in the double complex, it is shown that the algebra of conserved charges forms a spectrum with free parameters. The spectrum associated with the Green-Schwarz superstring is shown to contain and generalize the known superalgebras associated with the superstring.
description: 40 pages, 1 figure
Firm Survival and Quality Labels in the Food Industry
Creators: name: Bontemps, Christophe
name: Bouamra-Mechemache, Zohra
name: Simioni, Michel
name: Bontemps, Christophe
name: Bouamra-Mechemache, Zohra
name: Simioni, Michel
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agricultural and Food Policy
subject: Industrial Organization
subject: Production Economics
subject: Quality label
subject: PDO
subject: firm survival

description: Both industry and firm characteristics influence the survival of a firm in an industry over time. Aging, size, structure are factors often discussed in the literature, but public intervention effects -through public quality labeling for example - may also have an effect that is examined here. We use data on French firms producing cheese under public quality label or not over the period 1990-2006. We perform a nonparametric estimation using Kaplan-Meier estimators as well as proportional hazard rate models. Our results confirm existing findings on firm survival determinants. We also shed light on the effect of public intervention into that industry. More precisely, our focus on public quality labeling in the French cheese industry shows that quality label reduces the risk of exiting for firms and more particulary for small firms. In other words, public intervention in this industry is well designed to increase the competitiveness of small firms enabling the coexistence on the market of both small and large firms.
de Sitter Space as a Glauber-Sudarshan State
Creators: name: Brahma, Suddhasattwa
name: Dasgupta, Keshav
name: Tatar, Radu
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Glauber-Sudarshan states, sometimes simply referred to as Glauber states, or alternatively as coherent and squeezed-coherent states, are interesting states in the configuration spaces of any quantum field theories, that closely resemble classical trajectories in space-time. In this paper, we identify four-dimensional de Sitter space as a coherent state over a supersymmetric Minkowski vacuum. Although such an identification is not new, what is new however is the claim that this is realizable in full string theory, but only in conjunction with temporally varying degrees of freedom and quantum corrections resulting from them. Furthermore, fluctuations over the de Sitter space is governed by a generalized graviton (and flux)-added coherent state, also known as the Agarwal-Tara state. The realization of de Sitter space as a state, and not as a vacuum, resolves many issues associated with its entropy, zero-point energy and trans-Planckian censorship, amongst other things.
description: 124 pages, 1 figure; v2: Typos corrected and references added; v3: Some approximate results in sec 3.2 replaced by exact ones, typos corrected and references updated; v4: sec 3.3 elaborated, typos corrected and references updated. Final version to appear in JHEP
title: Ακριβής εντοπισμός στόχου για την επέμβαση της εν τω βάθει εγκεφαλικής διέγερσης στον υποθαλαμικό πυρήνα βάσει ανάλυσης συγχρονισμού δραστηριότητας νευρώνων
titleType: AlternativeTitle
Creators: name: Malamas, Dimitrios A.
Publisher: name: National Technological University of Athens
Year: 2014
Subjects: Νόσος Parkinson
Εγκεφαλική διέγερση
Δείκτης συνάφειας
Εντροπίας
Βασικά γάγγλια
Υποθαλαμικός πυρήνας
Parkinson’s disease
Deep brain stimulation
Entropy index
Phase coherence index
Basal ganglia
Subthalamic nucleus

description: Αντικείμενο της παρούσας διπλωματικής εργασίας αποτελεί η μελέτη των δει-κτών συγχρονισμού φάσης που προσδιορίζουν της βέλτιστη θέση του ηλεκτροδίου της εν τω βάθει εγκεφαλικής διέγερσης σε ασθενείς με νόσο του Parkinson, καθώς είναι καθοριστικής σημασίας για την επιτυχή έκβαση της επέμβασης. Ο υποθαλαμικός πυρήνας έχει αποτιμηθεί ως η καταλληλότερη περιοχή για αυτό το σκοπό. Επιπλέον, κρίσιμο παθολογικό χαρακτηριστικό της νόσου του Πάρκιν-σον, φαίνεται να αποτελεί ο υψηλός βαθμός συγχρονισμού της υποθαλαμικής δραστη-ριότητας νευρώνων. Στο πλαίσιο της εργασίας διερευνάται η δυνατότητα εντοπισμού του υποθαλαμικού πυρήνα και η βέλτιστης θέσης του τελικού ηλεκτροδίου μέσω της ανάλυσης του συγχρονισμού δυναμικών τοπικού πεδίου βάσει δεικτών συνάφειας. Οι ενδοπυρηνικές καταγραφές μικροηλεκτροδίων προέρχονται από 6 ασθενείς της Νευροχειρουργικής Κλινικής του Νοσοκομείου Ευαγγελισμός κι ύστερα από την απαιτούμενη ανάλυσή καταλήγουμε στο γεγονός της ορθότητας ή όχι των αποτελεσμά-των.
description: The subject of this thesis is the study of indices synchronization phase, identifying the optimal electrode position of deep brain stimulation on Parkinson’s patients, as they are crucial to the successful outcome of the surgery. The subthalamic nucleus has been rated as the most suitable area for this purpose. Moreover, a critical pathological feature of Parkinson disease, seems to be a high degree of synchronization of hypothalamic neurons activity. In the context of work investigates the possibility of locating the subthalamic nucleus and the optimal location of the final electrode through synchronization analysis of local field potentials based on indicators affinity. The intranuclear microelectrode recordings from 6 patients from the Neurosurgical Clinic of Evangelismos Hospital and after the required analysis results imply the correctness or otherwise of the results.
Complementarities and differences in adoption: an application of hazard models to two technologies in Madagascar
Creators: name: Butler, J.S.
name: Moser, Christine M.
name: Butler, J.S.
name: Moser, Christine M.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Food Security and Poverty
subject: International Development
subject: technology adoption
subject: hazard models

description: This paper explores the adoption of two agricultural technologies, how their patterns of adoption differ, and the relationship between them. The first technology, the System of Rice Intensification, has been studied previously and high rates of disadoption were observed in some areas. The second technology is off-season cropping, the practice of growing crops (primarily potatoes) in the rice fields during the winter season after the rice harvest. The rates of adoption of off-season cropping were much higher than for SRI and very little disadoption was observed. Through this study we are trying to understand the factors that might explain the differences in adoption and how the adoption of and experience with one technology affects the likelihood of adoption of the other. Our analysis uses hazard models, which have only recently been applied to technology adoption. Findings suggest that both methods increase the likelihood of adopting the other, and off-season crop adopters were less likely to disadopt SRI. Liquidity constraints appear to be more of an obstacle to SRI adoption, suggesting that this might help explain the relative success of off-season cropping.
Non-linear Morse-Bott functions on quaternionic Stiefel manifolds
Creators: name: Macías-Virgós, Enrique
name: Pereira-Sáez, María José
name: Tanré, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58E05 (Primary) 22E20, 22F30 (Secondary)

description: In the Stiefel manifold $X_{n,k}$, we replace Frankel linear height function by a quadratic one. We prove this is still a Morse-Bott function, whose structure of critical levels presents a dichotomy according to the sign of $n-2k$. The critical submanifolds are no longer Grassmannians but total spaces of fibrations of basis a product of two Grassmannians. We explicitly integrate the gradient flow.
Technical Change vs Efficiency Change: Performance of Food Industries over Time
Creators: name: Bontemps, Christophe
name: Nauges, Celine
name: Requillart, Vincent
name: Simioni, Michel
name: Bontemps, Christophe
name: Nauges, Celine
name: Requillart, Vincent
name: Simioni, Michel
Publisher: name: Unknown
Year: 2010
Subjects: subject: Productivity Analysis
subject: productivity
subject: efficiency
subject: technical change
subject: food industry

description: This paper proposes an iterative procedure for testing periods of technical progress and periods of technical regress. We apply this methodology to the French food industry.
Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for new-physics resonances decaying into a lepton and a jet performed by the ATLAS experiment is presented. Scalar leptoquarks pair-produced in $pp$ collisions at $\sqrt{s}=13$ TeV at the Large Hadron Collider are considered using an integrated luminosity of 139 fb$^{-1}$, corresponding to the full Run 2 dataset. They are searched for in events with two electrons or two muons and two or more jets, including jets identified as arising from the fragmentation of $c$- or $b$-quarks. The observed yield in each channel is consistent with the Standard Model background expectation. Leptoquarks with masses below 1.8 TeV and 1.7 TeV are excluded in the electron and muon channels, respectively, assuming a branching ratio into a charged lepton and a quark of 100%, with minimal dependence on the quark flavour. Upper limits on the aforementioned branching ratio are also given as a function of the leptoquark mass.
description: 39 pages in total, author list starting page 23, 9 figures, 5 tables, published in JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2019-13
Sovereign Wealth Fund Investment Patterns and Performance
Creators: name: Bortolotti, Bernardo
name: Fotak, Veljko
name: Megginson, William
name: Miracky, William
name: Bortolotti, Bernardo
name: Fotak, Veljko
name: Megginson, William
name: Miracky, William
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: Sovereign Wealth Funds
subject: International Financial Markets
subject: Government Policy and Regulation

description: This study describes the newly created Monitor-FEEM Sovereign Wealth Fund Database and discusses the investment patterns and performance of 1,216 individual investments, worth over $357 billion, made by 35 sovereign wealth funds (SWFs) between January 1986 and September 2008. Approximately half of the investments we document occur after June 2005, reflecting a recent surge of SWF activity. We document large SWF investments in listed and unlisted equity, real estate, and private equity funds, with the bulk of investments being targeted in cross-border acquisitions of sizeable but non-controlling stakes in operating companies and commercial properties. The average (median) SWF investment is a $441 million ($55 million) acquisition of a 42.3% (26.2%) stake in an unlisted company; the most active SWFs originate from Singapore or the United Arab Emirates. Almost one-third (30.9%) of the number, and over half of the value (54.6%) of SWF investments are directed toward financial firms. The vast majority of SWF investments involve privately-negotiated purchases of ownership stakes in underperforming firms. We perform event study analysis using a sample of 235 SWF acquisitions of equity stakes in publicly traded companies around the world, and document a significantly positive mean abnormal return of about 0.9% around the announcement date. However, one-year matched-firm abnormal returns of SWFs average -15.49%, suggesting equity acquisitions by SWFs are followed by deteriorating firm performance. In cross sectional analysis, we find weak evidence of benefits associated with a monitoring role of SWFs and evidence consistent with agency costs created by conflicts of interest between SWFs and minority shareholder. SWFs have collectively lost over $57billion on their holdings of listed stock investments alone through March 2009.
Homozygous GDF2 nonsense mutations result in a loss of circulating BMP9 and BMP10 and are associated with either PAH or an "HHT-like" syndrome in children.
Creators: name: Hodgson, Joshua
name: Ruiz-Llorente, Lidia
name: McDonald, Jamie
name: Quarrell, Oliver
name: Ugonna, Kelechi
name: Bentham, James
name: Mason, Rebecca
name: Martin, Jennifer
name: Moore, David
name: Bergstrom, Katie
name: Bayrak-Toydemir, Pinar
name: Wooderchak-Donahue, Whitney
name: Morrell, Nicholas
name: Condliffe, Robin
name: Bernabeu, Carmelo
name: Upton, Paul
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021

description: BACKGROUND: Disrupted endothelial BMP9/10 signaling may contribute to the pathophysiology of both hereditary hemorrhagic telangiectasia (HHT) and pulmonary arterial hypertension (PAH), yet loss of circulating BMP9 has not been confirmed in individuals with ultra-rare homozygous GDF2 (BMP9 gene) nonsense mutations. We studied two pediatric patients homozygous for GDF2 (BMP9 gene) nonsense mutations: one with PAH (c.[76C>T];[76C>T] or p.[Gln26Ter];[Gln26Ter] and a new individual with pulmonary arteriovenous malformations (PAVMs; c.[835G>T];[835G>T] or p.[Glu279Ter];[Glu279Ter]); both with facial telangiectases. METHODS: Plasma samples were assayed for BMP9 and BMP10 by ELISA. In parallel, serum BMP activity was assayed using an endothelial BRE-luciferase reporter cell line (HMEC1-BRE). Proteins were expressed for assessment of secretion and processing. RESULTS: Plasma levels of both BMP9 and BMP10 were undetectable in the two homozygous index cases and this corresponded to low serum-derived endothelial BMP activity in the patients. Measured BMP9 and BMP10 levels were reduced in the asymptomatic heterozygous p.[Glu279Ter] parents, but serum activity was normal. Although expression studies suggested alternate translation can be initiated at Met57 in the p.[Gln26Ter] mutant, this does not result in secretion of functional BMP9. CONCLUSION: Collectively, these data show that homozygous GDF2 mutations, leading to a loss of circulating BMP9 and BMP10, can cause either pediatric PAH and/or "HHT-like" telangiectases and PAVMs. Although patients reported to date have manifestations that overlap with those of HHT, none meet the Curaçao criteria for HHT and seem distinct from HHT in terms of the location and appearance of telangiectases, and a tendency for tiny, diffuse PAVMs.
Auctioning Monopoly Franchises: Award Criteria and Service Launch Requirements
Creators: name: Dosi, Cesare
name: Moretto, Michele
name: Dosi, Cesare
name: Moretto, Michele
Publisher: name: Unknown
Year: 2009
Subjects: subject: Public Economics
subject: Concessions
subject: Auctions
subject: Award criteria
subject: Service Rollout Time limits

description: We study the competition to acquire the exclusive right to operate an infrastructure service, by comparing two different specifications for the financial proposals - "lowest price to consumers" vs "highest concession fee", and two alternative contractual arrangements: a contract which imposes the obligation to immediately undertake the investment required to operate the concessioned service and a contract which simply assigns to the winning bidder the right to supply the market at a date of her choosing. By comparing the returns of these alternative award criteria and concessioning conditions, we show that concessioning without imposing rollout time limits may or may not provide a higher expected social value, depending on the bidding rule used to allocate the contract. In turn, the relative advantages of each award criterion are affected by the concessioning conditions.
Minnesota Farm Real Estate Sales: 1990-2008
Creators: name: Taff, Steven J.
name: Taff, Steven J.
Publisher: name: Unknown
Year: 2009
Subjects: Land Economics/Use

description: This report is a summary of the data contained on the farmland sales portion of the Minnesota Land Economics (MLE) web site (http://landeconomics.umn.edu ) as of May 20, 2009. It is formally reissued each Spring, as new sales data become available. We no longer distribute a separate farm real estate report in the Minnesota Agricultural Economist (now the Minnesota Applied Economist: http://www.apec.umn.edu/MnApEc). The present document consists largely of graphs and tables summarizing sales over the past eighteen years. It provides averages at the multi-county region and at the statewide levels of aggregation. Individual transaction data are available for downloading and analysis at the MLE web site. An electronic version of the current report in fully navigable portable document format (pdf) is also available: http: //landeconomics.umn.edu/mle/readings/Minnesota_Farm_Real_Estate_Sales.pdf.
Modelling Asymmetric Dependence Using Copula Functions: An Application to Value-at-Risk in the Energy Sector
Creators: name: Bastianin, Andrea
name: Bastianin, Andrea
Publisher: name: Unknown
Year: 2009
Subjects: subject: Risk and Uncertainty
subject: Copula functions
subject: Forecasting
subject: Value-At-Risk

description: In this paper I have used copula functions to forecast the Value-at-Risk (VaR) of an equally weighted portfolio comprising a small cap stock index and a large cap stock index for the oil and gas industry. The following empirical questions have been analyzed: (i) are there nonnormalities in the marginals? (ii) are there nonnormalities in the dependence structure? (iii) is it worth modelling these nonnormalities in risk- management applications? (iv) do complicated models perform better than simple models? As for questions (i) and (ii) I have shown that the data do deviate from the null of normality at the univariate, as well as at the multivariate level. When considering the dependence structure of the data I have found that asymmetries show up in their unconditional distribution, as well as in their unconditional copula. The VaR forecasting exercise has shown that models based on Normal marginals and/or with symmetric dependence structure fail to deliver accurate VaR forecasts. These findings confirm the importance of nonnormalities and asymmetries both in-sample and out-of-sample.
Online Table S1. from Outbreak of SARS-CoV-2 at a hospice—terminated after the implementation of enhanced aerosol infection control measures
Creators: name: Feathers, Luke
name: Hinde, Tracey
name: Bale, Tammy
name: Hyde, Jo
name: Bird, Paul W.
name: Holmes, Christopher W.
name: Tang, Julian W.
Publisher: name: The Royal Society
Year: 2021
Subjects: Environmental Science

description: Ventilation survey (21 Dec 2020). All fall below the ideal 6 ACH (air changes per hour).
The Investment Strategies of Sovereign Wealth Funds
Creators: name: Bernstein, Shai
name: Lerner, Josh
name: Schoar, Antoinette
name: Bernstein, Shai
name: Lerner, Josh
name: Schoar, Antoinette
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: General Finance
subject: Countries & Regions
subject: Financial Services

description: This paper examines the direct private equity investment strategies across sovereign wealth funds and their relationship to the funds’ organizational structures. SWFs seem to engage in a form of trend chasing, since they are more likely to invest at home when domestic equity prices are higher, and invest abroad when foreign prices are higher. Funds see the industry P/E ratios of their home investments drop in the year after the investment, while they have a positive change in the year after their investments abroad. SWFs where politicians are involved have a much greater likelihood of investing at home than those where external managers are involved. At the same time, SWFs with external managers tend to invest in lower P/E industries, which see an increase in the P/E ratios in the year after the investment. By way of contrast, funds with politicians involved invest in higher P/E industries, which have a negative valuation change in the year after the investment.
On the principal bifurcation branch of a third order nonlinear long-wave equation
Creators: name: Benguria, R. D.
name: Depassier, M. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study the principal bifurcation curve of a third order equation which describes the nonlinear evolution of several systems with a long--wavelength instability. We show that the main bifurcation branch can be derived from a variational principle. This allows to obtain a close estimate of the complete branch. In particular, when the bifurcation is subcritical, the large amplitude stable branch can be found in a simple manner.
description: 11 pages, 3 figures
Leptoglossus gonagra
Creators: name: Heyden, Torsten van der
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Coreidae
Leptoglossus
Leptoglossus gonagra

description: Leptoglossus gonagra (Fabricius, 1775)
(Heteroptera: Coreidae) was reported by AUKEMA et al. (2006, 2013) for the islands of Tenerife and Gran Canaria. ROCA-CUSACHS et al. (2020) added the island of La Palma to the list of its distribution on the Canary Islands. Recently, L. gonagra was found on the island of El Hierro: On 21-11-2022, an adult specimen was photographed near the Pozo de Las Calcosas in the northern part of the island (Fig. 1). Photos of the specimen were uploaded to the online database iNaturalist (see here and here).
description: Published as part of Heyden, Torsten van der, 2023, New records of Heteroptera from the Canary Islands (Spain), I, pp. 101-104 in Arquivos Entomolóxicos 26 on page 101, DOI: 10.5281/zenodo.12812757
Dynamic Core-Theoretic Cooperation in a Two-Dimensional International Environmental Model
Creators: name: Germain, Marc
name: Tulkens, Henry
name: Magnus, Alphonse
name: Germain, Marc
name: Tulkens, Henry
name: Magnus, Alphonse
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Stock Pollutant
subject: Capital Accumulation
subject: International Environmental Agreements
subject: Dynamic Core Solution

description: This article deals with cooperation issues in international pollution problems in a two dimensional dynamic framework implied by the accumulation of the pollutant and of the capital goods. Assuming that countries do reevaluate at each period the advantages to cooperate or not given the current stocks of pollutant and capital, and under the assumption that damage cost functions are linear, we define at each period of time a transfer scheme between countries, which makes cooperation better for each of them than non-cooperation. This transfer scheme is also strategically stable in the sense that it discourages partial coalitions.
Overdependence on Credit Ratings Was a Primary Cause of the Crisis
Creators: name: Partnoy, Frank
name: Partnoy, Frank
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: Rating Agencies
subject: Subprime Mortgages
subject: Securitization

description: The first part of the paper describes how over time credit rating agencies ceased to play the role of information intermediaries. Rating agencies did not provide information about the risk associated with the securitized instruments, but they simply enabled structurers to create and maintain tranches of these instruments with unjustifiably high credit ratings. The second part of the paper suggests how future policy may minimize overdependence on credit ratings, by removing regulatory licences and by implementing shock-therapy mechanisms to wean investors simple rating mnemonics.
Endogenous Network Dynamics
Creators: name: Page, Frank H.
name: Wooders, Myrna H.
name: Page, Frank H.
name: Wooders, Myrna H.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Institutional and Behavioral Economics
subject: Endogenous Network Dynamics
subject: Dynamic Stochastic Games of Network Formation
subject: Equilibrium Markov Process of Network Formation
subject: Basins of Attraction
subject: Harris Decomposition
subject: Ergodic Probability Measures
subject: Dynamic Path Dominance Core
subject: Dynamic Pairwise Stability

description: In all social and economic interactions, individuals or coalitions choose not only with whom to interact but how to interact, and over time both the structure (the “with whom”) and the strategy (“the how”) of interactions change. Our objectives here are to model the structure and strategy of interactions prevailing at any point in time as a directed network and to address the following open question in the theory of social and economic network formation: given the rules of network and coalition formation, the preferences of individuals over networks, the strategic behavior of coalitions in forming networks, and the trembles of nature, what network and coalitional dynamics are likely to emerge and persist. Our main contributions are (i) to formulate the problem of network and coalition formation as a dynamic, stochastic game, (ii) to show that this game possesses a stationary correlated equilibrium (in network and coalition formation strategies), (iii) to show that, together with the trembles of nature, this stationary correlated equilibrium determines an equilibrium Markov process of network and coalition formation, and (iv) to show that this endogenous process possesses a finite, nonempty set of ergodic measures, and generates a finite, disjoint collection of nonempty subsets of networks and coalitions, each constituting a basin of attraction. We also extend to the setting of endogenous Markov dynamics the notions of pairwise stability (Jackson-Wolinsky, 1996), strong stability (Jacksonvan den Nouweland, 2005), and Nash stability (Bala-Goyal, 2000), and we show that in order for any network-coalition pair to persist and be stable (pairwise, strong, or Nash) it is necessary and sufficient that the pair reside in one of finitely many basins of attraction. The results we obtain here for endogenous network dynamics and stochastic basins of attraction are the dynamic analogs of our earlier results on endogenous network formation and strategic basins of attraction in static, abstract games of network formation (Page and Wooders, 2008), and build on the seminal contributions of Jackson and Watts (2002), Konishi and Ray (2003), and Dutta, Ghosal, and Ray (2005).
Alfven Wave-Driven Proto-Neutron Star Winds And R-Process Nucleosynthesis
Creators: name: Suzuki, Takeru K.
name: Nagataki, Shigehiro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose magnetic proto-neutron star (PNS) winds driven by \Alfven waves as well as the neutrino heating as an appropriate site for the r-process nucleosynthesis. \Alfven waves excited by surface motions of a PNS propagate outwardly, and they heat and accelerate the wind by dissipation. Compared with the wind purely driven by the neutrino heating, larger entropy per baryon and shorter dynamical time scale are achieved, which favors the r-process. We study reasonable cases that a wave amplitude is 10% of \Alfven speed at the surface to find that a PNS with surface field strength, $\gtrsim 5\times 10^{14}$G, gives suitable wind properties for the r-process, provided that dissipation length of the wave is at most $\sim$ 10 times of the PNS radius. We also compare properties of transcritical and subcritical winds in light of the r-process. We finally discuss possibilities of detections of $γ$-rays from radioactive nuclei and absorption lines due to Ba in supernova remnants which possess magnetars.
description: 14 pages, including 4 figures, ApJ, in press
Ukraine's Agriculture Policy Review
Creators: name: Kwiecinski, Andrzej
name: Kwiecinski, Andrzej
Publisher: name: Unknown
Year: 2004
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Food Consumption/Nutrition/Food Safety
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Land Economics/Use
subject: Livestock Production/Industries
subject: Resource /Energy Economics and Policy
subject: OECD
subject: agricultural policies
subject: producer support estimates
subject: PSE
subject: agricultural support
subject: macroeconomic conditions
subject: agro-processing sector
subject: rural infrastructure

description: Recently, the OECD prepared a detailed review of Ukraine's agricultural policies and potential that included Producer Support Estimates (PSE) calculations. Canada provided a peer-review of this paper. It provides a preview of the caliber and range of information that can be expected from the proposed consortium reviews. The Ukraine review included discussions of how Ukrainian agricultural policies have evolved and the nature of agricultural support. It also highlighted macroeconomic conditions in the agroprocessing sector and rural infrastructure. In this way, the review drew out Ukraine's path as they grew from a struggling economy to a potential agricultural competitor.