cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modelling the Dissipation Range of von Kármán Turbulence Spectrum
Creators: name: Santos, F. L. dos
name: Botero-Bolívar, L.
name: Venner, C. H.
name: de Santana, L. D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Noise pollution caused by inflow turbulence is a major problem in many applications, such as propellers and fans. Leading edge noise models, e.g., Amiet's model, are widely applied to predict the noise produced by these applications. This noise prediction model relies on the accuracy of the turbulence spectrum, which is usually assumed to be the von Kármán energy spectrum for isotropic turbulence. However, the von Kármán spectrum does not model accurately the dissipation range of the turbulent energy, resulting in incorrect far-field noise predictions for the high-frequency range. An exponential correction can be applied to the spectrum to model the dissipation range. This correction depends on the dissipation frequency, which is the frequency where the energy spectrum changes from a dependence of $k^{-5/3}$ to an exponential decay. This study experimentally investigates nearly isotropic inflow turbulence and determines the flow field characteristics that affect the dissipation frequency in order to model this frequency and the dissipation range. Experiments have been conducted with two passive grids and hot-wire anemometry in the Aeroacoustic Wind Tunnel of the University of Twente. The turbulence uniformity in the test section and the turbulence development in the streamwise direction were analyzed, showing that the grid generated turbulence was mostly uniform and nearly isotropic. The dissipation frequency was observed to depend on the turbulence intensity, the free-stream velocity, and the turbulence length scale. An expression to compute this frequency is proposed, as well as a formula to predict the dissipation range. The predicted leading edge noise is affected by the dissipation range modelling in the high-frequency range, presenting a decrease in level up to 17 dB for the highest frequencies.
Very high critical field and superior Jc-field performance in NdO0.82F0.18FeAs with Tc of 51 K
Creators: name: Wang, X. L.
name: Ghorbani, R.
name: Peleckis, G.
name: Dou, S. X.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The discovery of the new family of oxypnictide superconductors, such as LaFeAsO0.89F0.1, with critical temperature, Tc, over 26 K, has brought new impetus to the fields of high temperature superconductivity and strongly correlated electron systems. These materials showed high upper critical fields, Hc2, which have been estimated to be higher than 55 or 63-65 T in LaO0.9F0.1FeAs with Tc of 26 K, 70 T in PrFeAsO0.85F0.15, and over 100 T in SmO0.85F0.15FeAs with Tc of 46 K. The two gap superconductivity proposed for LaO0.9F0.1FeAs suggests that the Hc2 could be further increased to a significant extent. This is one of the unique features of the FeAs based new superconductors. In this work, we show that the Bc2(48 K) = 13 T and the Bc2(0) value can exceed 230 T in a high pressure fabricated NdO0.82F0.18FeAs bulk sample with Tc of 51 K. We also demonstrate that the supercurrent density from 1 up to 9 T only drops by a factor of 2-6 for T < 30 K, much weaker than MgB2 and high Tc cuprate superconductors. The very high Bc2 already far surpasses those of high Tc cuprates, MgB2, and classical low temperature superconductors, paving the way to use the new NdO0.82F0.18FeAs superconductors for high-field applications.
description: 11 pages, 7 figures
Conditions for free magnetic monopoles in nanoscale square arrays of dipolar spin ice
Creators: name: Mól, L. A. S.
name: Moura-Melo, W. A.
name: Pereira, A. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study a modified frustrated dipolar array recently proposed by Möller and Moessner [Phys. Rev. Lett. \textbf{96}, 237202 (2006)], which is based on an array manufactured lithographically by Wang \emph{et al.} [Nature (London) \textbf{439}, 303 (2006)] and consists of introducing a height offset $h$ between islands (dipoles) pointing along the two different lattice directions. The ground-states and excitations are studied as a function of $h$. We have found, in qualitative agreement with the results of Möller and Moessner, that the ground-state changes for $h>h_{1}$, where $h_{1}= 0.444a$ ($a$ is the lattice parameter or distance between islands). In addition, the excitations above the ground-state behave like magnetic poles but confined by a string, whose tension decreases as $h$ increases, in such a way that for $h\approx h_1$ its value is around 20 times smaller than that for $h=0$. The system exhibits an anisotropy in the sense that the string tension and magnetic charge depends significantly on the directions in which the monopoles are separated. In turn, the intensity of the magnetic charge abruptly changes when the monopoles are separated along the direction of the longest axis of the islands. Such a gap is attributed to the transition from the anti to the ferromagnetic ground-state when $h=h_1$.
description: 6 pages, 7 figures. Published version
Hypotekbankens Garanti- og Låneadministrationssystem
Creators: Finansstyrelsen
Økonomistyrelsen
Statens Administration
Publisher: name: Rigsarkivet
Year: 2022

description: Målet med GLAS på sagsbehnadlingssiden er at opbygge et sammenhængende informationssystem til brug for den daglige sagsstyring/sagsbehandling af lån og beviligede garantier for finansforvaltningens områder vedrørende bolig, erhver oglandbrug.
Spin current Kondo effect in frustrated Kondo systems
Creators: name: Wang, Jiangfan
name: Yang, Yi-feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic frustrations can enhance quantum zero-point motion in spin systems and lead to exotic topological insulating states. When coupled to mobile electrons, they may lead to unusual non-Fermi liquid or metallic spin liquid states whose nature has not been well explored. Here, we propose a spin current Kondo mechanism underlying a series of non-Fermi liquid phases on the border of Kondo and magnetic phases in a frustrated three-impurity Kondo model. This mechanism is confirmed by renormalization group analysis and describes movable Kondo singlets called "holons" induced by an effective coupling between the spin current of conduction electrons and the vector chirality of localized spins. Similar mechanism may widely exist in all frustrated Kondo systems and be detected through spin-current noise measurements.
description: 8 pages, 4 figures
Self-Correcting Quantum Computers
Creators: name: Bombin, H.
name: Chhajlany, R. W.
name: Horodecki, M.
name: Martin-Delgado, M. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Is the notion of a quantum computer resilient to thermal noise unphysical? We address this question from a constructive perspective and show that local quantum Hamiltonian models provide self-correcting quantum computers. To this end, we first give a sufficient condition on the connect- edness of excitations for a stabilizer code model to be a self-correcting quantum memory. We then study the two main examples of topological stabilizer codes in arbitrary dimensions and establish their self-correcting capabilities. Also, we address the transversality properties of topological color codes, showing that 6D color codes provide a self-correcting model that allows the transversal and local implementation of a universal set of operations in seven spatial dimensions. Finally, we give a procedure to initialize such quantum memories at finite temperature.
description: RevTeX, 24 pages, version revised to increase readability: added sketch of proof of stability criterion, rewritten section on implementation of quantum computation, revised introduction and conclusions
Charge density wave orders and enhanced superconductivity under pressure in the kagome metal CsV3Sb5
Creators: name: Wang, Qi
name: Kong, Pengfei
name: Shi, Wujun
name: Pei, Cuiying
name: Wen, Chenhaoping
name: Gao, Lingling
name: Zhao, Yi
name: Yin, Qiangwei
name: Wu, Yueshen
name: Li, Gang
name: Lei, Hechang
name: Li, Jun
name: Chen, Yulin
name: Yan, Shichao
name: Qi, Yanpeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Superconductivity in topological kagome metals has recently received great research interests. Here, charge density wave (CDW) orders and the evolution of superconductivity under various pressures in CsV3Sb5 single crystal with V kagome lattice are investigated. By using high-resolution scanning tunnelling microscopy /spectroscopy (STM/STS), two CDW orders in CsV3Sb5 are observed which correspond to 4a*1a and 2a*2a superlattices. By applying pressure, the superconducting transition temperature Tc is significantly enhanced and reaches a maximum value of 8.2 K at around 1 GPa. Accordingly, CDW state is gradually declined as increasing the pressure, which indicates the competing interplay between CDW and superconducting state in this material. The broad superconducting transitions around 0.4 - 0.8 GPa can be related to the strong competition relation among two CDW states and superconductivity. These results demonstrate that CsV3Sb5 is a new platform for exploring the interplay between superconductivity and CDW in topological kagome metals.
description: 20 pages, 10 figures
Råstofindvinding på land i Danmark 2012
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med statistikken er at producere statistik over den fysiske råstofindvinding i Danmark. Anvendelsesområder: Offentlige og private planlægningsformål, uddannelse og offentlig debat. Brugere: Kommuner, regioner, ministerier, organisationer, internationale organisationer, pressen, private virksomheder samt privatpersoner.
Additional file 1 of Determinants of viral load suppression among adolescents on antiretroviral therapy in Eswatini: a cross-sectional study
Creators: name: Hlophe, Londiwe D.
name: Shumba, Constance S.
name: Bedada, Diribsa T.
name: Nyasulu, Peter S.
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Supplementary Material 1
Advanced applications of X-ray Absorption Spectroscopy to the study of protein metal sites.
Creators: name: Veronesi, Giulia <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: FIS/03 Fisica della materia

description: We present a study of the metal sites of different proteins through X-ray Absorption Fine Structure (XAFS) spectroscopy. First of all, the capabilities of XAFS analysis have been improved by ab initio simulation of the near-edge region of the spectra, and an original analysis method has been proposed. The method subsequently served ad a tool to treat diverse biophysical problems, like the inhibition of proton-translocating proteins by metal ions and the matrix effect exerted on photosynthetic proteins (the bacterial Reaction Center, RC) by strongly dehydrate sugar matrices. A time-resolved study of Fe site of RC with μs resolution has been as well attempted.
Finally, a further step aimed to improve the reliability of XAFS analysis has been performed by calculating the dynamical parameters of  the metal binding cluster by means of DFT methods, and the theoretical result obtained for MbCO has been successfully compared with experimental data.
Theory of Huge Thermoelectric Effect Based on Magnon Drag Mechanism: Application to Thin-Film Heusler Alloy
Creators: name: Matsuura, Hiroyasu
name: Ogata, Masao
name: Mori, Takao
name: Bauer, Ernst
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: To understand the unexpectedly high thermoelectric performance observed in the thin-film Heusler alloy Fe$_2$V$_{0.8}$W$_{0.2}$Al, we study the magnon drag effect, generated by the tungsten based impurity band, as a possible source of this enhancement, in analogy to the phonon drag observed in FeSb$_2$. Assuming that the thin-film Heusler alloy has a conduction band integrating with the impurity band, originated by the tungsten substitution, we derive the electrical conductivity $L_{11}$ based on the self-consistent t-matrix approximation and the thermoelectric conductivity $L_{12}$ due to magnon drag, based on the linear response theory, and estimate the temperature dependent electrical resistivity, Seebeck coefficient and power factor. Finally, we compare the theoretical results with the experimental results of the thin-film Heusler alloy to show that the origin of the exceptional thermoelectric properties is likely to be due to the magnon drag related with the tungsten-based impurity band.
description: 5+3 pages, 3+2 figures
Random tensor theory: extending random matrix theory to random product states
Creators: name: Ambainis, Andris
name: Harrow, Aram W.
name: Hastings, Matthew B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider a problem in random matrix theory that is inspired by quantum information theory: determining the largest eigenvalue of a sum of p random product states in (C^d)^{otimes k}, where k and p/d^k are fixed while d grows. When k=1, the Marcenko-Pastur law determines (up to small corrections) not only the largest eigenvalue ((1+sqrt{p/d^k})^2) but the smallest eigenvalue (min(0,1-sqrt{p/d^k})^2) and the spectral density in between. We use the method of moments to show that for k>1 the largest eigenvalue is still approximately (1+sqrt{p/d^k})^2 and the spectral density approaches that of the Marcenko-Pastur law, generalizing the random matrix theory result to the random tensor case. Our bound on the largest eigenvalue has implications both for sampling from a particular heavy-tailed distribution and for a recently proposed quantum data-hiding and correlation-locking scheme due to Leung and Winter. Since the matrices we consider have neither independent entries nor unitary invariance, we need to develop new techniques for their analysis. The main contribution of this paper is to give three different methods for analyzing mixtures of random product states: a diagrammatic approach based on Gaussian integrals, a combinatorial method that looks at the cycle decompositions of permutations and a recursive method that uses a variant of the Schwinger-Dyson equations.
description: 35 pages. v2: added a discussion of related work in convex geometry and a new result about the smallest eigenvalue
Gene mutations affecting nuclear behaviour in Paramecium tetraurelia
Creators: name: Morton, Phyllida Mary Barry
Publisher: name: University of British Columbia
Year: 2010

description: Three Paramecium tetraurelia cell lines with abnormal patterns of nuclear behaviour at cell division and at nuclear reorganization were recovered in separate experiments following nitrosoguanidine mutagenesis. Two of these lines carried non-allelic "tam" mutations, (tam A and tam G). Tarn is a series of recessive genes that exert a pleiotropic effect on macronuclear behaviour during cell division and on the migration and attachment of trichocysts during trichocyst morphogenesis (Ruiz, et al., 1976). At binary fission the macronuclei of homozygous "tam" cells fail to elongate and fail to migrate to the dorsal cortex. This leads to unequal division of the macronucleus or, in extreme cases, complete absence of division of the macronucleus. At cytokinesis, in the latter event, the entire prefission macronucleus is retained by one sister cell, usually the proter. At nuclear reorganization, missegregation of the macronuclear anlagen commonly occurs either at the first or at the second post-reorganizational cell division. Exautogamonts or exconjugants that do not receive a macronuclear anlage at cell division undergo macronuclear regeneration (Sonneborn, 1940; Berger, 1973a). Improper distribution of micronuclei occurs frequently during cell division in cells expressing the "tam" phenotype. The trichocysts of homozygous "tam" cells are abnormally shaped, are unattached and do not discharge. The third variant recovered is unable to complete conjugation owing to abnormalities in the micronuclear events.
The first $R_{cr}$ as a possible measure of the entrainment length in a 2D steady wake
Creators: name: Daniela, Tordella
name: Stefania, Scarsoglio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: At a fixed distance from the body which creates the wake, entrainment is only seen to increase with the Reynolds number ($R$) up to a distance of almost 20 body scales. This increase levels up to a Reynolds number close to the critical value for the onset of the first instability. The entrainment is observed to be almost extinguished at a distance which is nearly the same for all the steady wakes within the $R$ range here considered, i.e. [20-100], which indicates that supercritical steady wakes have the same entrainment length as the subcritical ones. It is observed that this distance is equal to a number of body lengths that is equal to the value of the critical Reynolds number ($\sim 47$), as indicated by a large compilation of experimental results. {\it A fortiori} of these findings, we propose to interpret the unsteady bifurcation as a process that allows a smooth increase-redistribution of the entrainment along the wake according to the weight of the convection over the diffusion. The entrainment variation along the steady wake has been determined using a matched asymptotic expansion of the Navier-Stokes velocity field [Tordella and Belan, {\it Physics of Fluids}, 15(2003)] built on criteria that include the matching of the transversal velocity produced by the entrainment process.
Knot invariants derived from the equivariant linking pairing
Creators: name: Lescop, Christine
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Let M be a closed oriented 3-manifold with first Betti number one. Its equivariant linking pairing may be seen as a two-dimensional cohomology class in an appropriate infinite cyclic covering of the configuration space of ordered pairs of distinct points of M. We show how to define the equivariant cube Q(M,K) of this Blanchfield pairing with respect to a framed knot K that generates H_1(M;Z)/Torsion. We present the invariant Q(M,K) and some of its properties including a surgery formula. Via surgery, the invariant Q is equivalent to an invariant Q' of null-homologous knots in rational homology spheres, that is conjecturally equivalent to the two-loop part of the Kontsevich integral. We generalize the construction of Q' to obtain a topological construction for an invariant that is conjecturally equivalent to the whole Kricker rational lift of the Kontsevich integral for null-homologous knots in rational homology spheres.
description: 26 pages, uses pstricks, revised version, construction of invariants adjusted to make them actually live in the target space of the Kricker lift of the Kontsevich integral
Pseudeniaca lyncaea MASI 1936
Creators: name: Madl, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chalcididae
Pseudeniaca
Pseudeniaca lyncaea

description: Pseudeniaca lyncaea MASI, 1936
 Pseudeniaca lyncaea sp.n.: MASI 1936: 126 (typus generis by monotypy, description ♀, Ghinda), 127 (figs a-c).
 Pseudeniaca lyncea (!) MASI, 1936: SCHMITZ 1946: 174 (typus generis, key, taxonomy, Eritrea (MASI 1936)).
 Pseudeniaca lyncaea MASI, 1936: MASI 1947: 45 (taxonomy), 76 (taxonomy), 77 (taxonomy), 78 (key, Eritrea without exact locality).
D i s t r i b u t i o n:Ghinda.
 Pseudeniaca lyncaea is also recorded from the Democratic Republic of the Congo and Rwanda.
description: Published as part of Madl, Michael, 2023, A catalogue of the family Chalcididae (Hymenoptera, Chalcidoidea) of Eritrea, pp. 205-211 in Linzer biologische Beiträge 55 (1) on page 208, DOI: 10.5281/zenodo.10414847
بررسی تأثیر مدیریت سود تعهدی بر رتبه اعتباری در قالب مدل امتیاز بازار نوظهور
Creators: name: محمدی خانقاه، گلشن
Publisher: name: Zenodo
Year: 2019
Subjects: رتبه اعتباری، مدیریت سود تعهدی، ریسک اعتباری

description: چکیده هدف: مددیران به‏منظور جلوگیری از انحرافات از شرایط تعهد بدهی و کاهش هزینه تامین مالی ممکن است دست به مدیریت سود بزنند. از آنجا که هزینه تامین مالی با ریسک رابطه مستقیم دارد یعنی هرچه ریسک اعتباری شرکت پایین‏تر باشد، هزینه تامین مالی آن کمتر خواهد بود، می توان انتظار داشت مدیران شرکت‏ها از مدیریت سود تعهدی برای کاهش هزینه تامین مالی و درنتیجه کاهش ریسک اعتباری استفاده کنند. به عبارت دیگر هدف پژوهش حاضر بررسی این موضوع است که آیا مدیریت سود تعهدی می‏تواند منجر به کاهش ریسک و در نتیجه افزایش رتبه اعتباری (با استفاده از مدل امتیاز بازار نوظهور) شود؟ روش: بده‏منظور اجرای این یژهش، 144 شرکت پذیرفته شده در بورس اوراق بهادار تهران طی دوره زمانی 88 تا 96 انتخاب شدند. داده های پژوهش از نرم‏افزار ره‏آورد نوین و صورت‏های مالی استخراج شدند. رتبه اعتباری با استفاده از مدل امتیاز بازار نوظهور و مدیریت سود تعهدی از طریق مدل جونز اندازه‏گیری شد. برای آزمون فرضیه پژوهش از مدل رگرسیون خطی چندمتغیره، رویکرد داده‏های ترکیبی و روش EGLS استفاده شد. یافته‏ها: نیایج نشان داد مدیریت سود تعهدی بر رتبه اعتباری اثر مستقیم و معنی‏دار دارد. به عبارت دیگر، هرچه مدیریت سود تعهدی بیشتر باشد رتبه اعتباری بالاتر خواهد بود. بنابراین می‏توان نتیجه گرفت مدیران شرکت‏ها به‏منظور جلوگیری از انحراف از تعهد بدهی و جلوگیری از کاهش رتبه اعتباری، دست به مدیریت سود تعهدی می‏زنند.
De Finetti theorems for easy quantum groups
Creators: name: Banica, Teodor
name: Curran, Stephen
name: Speicher, Roland
Publisher: name: arXiv
Year: 2009
Subjects: subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We study sequences of noncommutative random variables which are invariant under "quantum transformations" coming from an orthogonal quantum group satisfying the "easiness" condition axiomatized in our previous paper. For 10 easy quantum groups, we obtain de Finetti type theorems characterizing the joint distribution of any infinite quantum invariant sequence. In particular, we give a new and unified proof of the classical results of de Finetti and Freedman for the easy groups S_n, O_n, which is based on the combinatorial theory of cumulants. We also recover the free de Finetti theorem of Köstler and Speicher, and the characterization of operator-valued free semicircular families due to Curran. We consider also finite sequences, and prove an approximation result in the spirit of Diaconis and Freedman.
description: Published in at http://dx.doi.org/10.1214/10-AOP619 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Can power-law scaling and neuronal avalanches arise from stochastic dynamics?
Creators: name: Touboul, Jonathan
name: Destexhe, Alain
Publisher: name: arXiv
Year: 2009
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The presence of self-organized criticality in biology is often evidenced by a power-law scaling of event size distributions, which can be measured by linear regression on logarithmic axes. We show here that such a procedure does not necessarily mean that the system exhibits self-organized criticality. We first provide an analysis of multisite local field potential (LFP) recordings of brain activity and show that event size distributions defined as negative LFP peaks can be close to power-law distributions. However, this result is not robust to change in detection threshold, or when tested using more rigorous statistical analyses such as the Kolmogorov-Smirnov test. Similar power-law scaling is observed for surrogate signals, suggesting that power-law scaling may be a generic property of thresholded stochastic processes. We next investigate this problem analytically, and show that, indeed, stochastic processes can produce spurious power-law scaling without the presence of underlying self-organized criticality. However, this power-law is only apparent in logarithmic representations, and does not survive more rigorous analysis such as the Kolmogorov-Smirnov test. The same analysis was also performed on an artificial network known to display self-organized criticality. In this case, both the graphical representations and the rigorous statistical analysis reveal with no ambiguity that the avalanche size is distributed as a power-law. We conclude that logarithmic representations can lead to spurious power-law scaling induced by the stochastic nature of the phenomenon. This apparent power-law scaling does not constitute a proof of self-organized criticality, which should be demonstrated by more stringent statistical tests.
description: 14 pages, 10 figures; PLoS One, in press (2010)
Design and development 
of new green catalytic methodologies for the 
synthesis of enantiomerically 
enriched molecules
Creators: name: Sinisi, Riccardo <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: CHIM/06 Chimica organica

description: The following Ph.D work was mainly focused on catalysis, as a key technology, to achieve the objectives of sustainable (green) chemistry. 
After introducing the concepts of sustainable (green) chemistry and an assessment of new sustainable chemical technologies, the relationship between catalysis and sustainable (green) chemistry was briefly discussed and illustrated via an analysis of some selected and relevant examples. 

Afterwards, as a continuation of the ongoing interest in Dr. Marco Bandini’s group on organometallic and organocatalytic processes, I addressed my efforts to the design and development of novel catalytic green methodologies for the synthesis of enantiomerically enriched molecules. 

In the first two projects the attention was focused on the employment of solid supports to carry out reactions that still remain a prerogative of omogeneous catalysis. Firstly, particular emphasis was addressed to the discovery of catalytic enantioselective variants of nitroaldol condensation (commonly termed Henry reaction), using a complex consisting in a polyethylene supported diamino thiopene (DATx) ligands and copper as active species. 

In the second project, a new class of electrochemically modified surfaces with DATx palladium complexes was presented. The DATx-graphite system proved to be efficient in promoting the Suzuki reaction. Moreover, in collaboration with Prof. Wolf at the University of British Columbia (Vancouver), cyclic voltammetry studies were reported. This study disclosed new opportunities for carbon–carbon forming processes by using heterogeneous, electrodeposited catalyst films.

A straightforward metal-free catalysis allowed the exploration around the world of organocatalysis. In fact, three different and novel methodologies, using Cinchona, Guanidine and Phosphine derivatives, were envisioned in the three following projects. An interesting variant of nitroaldol condensation with simple trifluoromethyl ketones and also their application in a non-conventional activation of indolyl cores by Friedel-Crafts-functionalization, led to two novel synthetic protocols. These approaches allowed the preparation of synthetically useful trifluoromethyl derivatives bearing quaternary stereocenters. Lastly, in the sixth project the first γ-alkylation of allenoates with conjugated carbonyl compounds was envisioned.

In the last part of this Ph.D thesis bases on an extra-ordinary collaboration with Prof. Balzani and Prof. Gigli, I was involved in the synthesis and characterization of a new type of heteroleptic cyclometaled-Ir(III) complexes, bearing bis-oxazolines (BOXs) as ancillary ligands. The new heteroleptic complexes were fully characterized and in order to examine the electroluminescent properties of FIrBOX(CH2), an Organic Light Emitting Device was realized.
Coherent Dual Comb Spectroscopy at High Signal to Noise
Creators: name: Coddington, I.
name: Swann, W. C.
name: Newbury, N. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Two frequency combs can be used to measure the full complex response of a sample in a configuration which can be alternatively viewed as the equivalent of a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheterodyne laser spectrometer. This dual comb spectrometer retains the frequency accuracy and resolution inherent to the comb sources. We discuss, in detail, the specific design of our coherent dual-comb spectrometer and demonstrate the potential of this technique by measuring the first overtone vibration of hydrogen cyanide, centered at 194 THz (1545 nm). We measure the fully normalized, complex response of the gas over a 9 THz bandwidth at 220 MHz frequency resolution yielding 41,000 resolution elements. The average spectral signal-to-noise ratio (SNR) is 2,500 for both the fractional absorption and the phase, with a peak SNR of 4,000 corresponding to a fractional absorption sensitivity of 0.025% and phase sensitivity of 250 microradians. As the spectral coverage of combs expands, this dual-comb spectroscopy could provide high frequency accuracy and resolution measurements of a complex sample response across a range of spectral regions.
description: 18 pages, 8 figures updated references, updated to match publication version
Antrocephalus ferrierei
Creators: name: Madl, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chalcididae
Antrocephalus
Antrocephalus ferrierei

description: Antrocephalus ferrierei (MASI, 1936)
 Stomatoceras Ferrierei sp n.: MASI 1936: 132 (description ♀, Ghinda).
 Stomatoceras ferrièrei (!) MASI, 1935: SCHMITZ 1946: 128 (catalogue Afrotropical region), 130 (key, taxonomy, description ♀, Eritrea (MASI 1936)), pl. 9 (figs 9-11).
 Antrocephalus ferrierei MASI, 1935: NONVEILLER 1984: 119 (taxonomy). Publication not seen.
D i s t r i b u t i o n:Ghinda.
 Antrocephalus ferrierei is also recorded from Cameroon and Rwanda.
description: Published as part of Madl, Michael, 2023, A catalogue of the family Chalcididae (Hymenoptera, Chalcidoidea) of Eritrea, pp. 205-211 in Linzer biologische Beiträge 55 (1) on page 209, DOI: 10.5281/zenodo.10414847
L’«educativo» in sanità: reti di complessità e orizzonti di possibilità
Educational in healthcare: complexity networks and possibility
Creators: name: Benini, Stefano <1972>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: M-PED/01 Pedagogia generale e sociale

description: La tesi analizza il dialogo tra due prospettive disciplinari:  pedagogia e scienze mediche aprendo ad una serie di riflessioni operative e metodologiche per lo sviluppo della competenza educativa in sanità. 
Si tratta di un lavoro di ricerca pedagogica articolata in due parti:una teoretica e una empirica.
La prima parte pone l’attenzione in modo particolare  all’epistemologia della cura sanitaria nella prospettiva della complessità e agli elementi che definiscono la competenza educativa degli operatori. 
La seconda parte presenta i dati di una indagine esplorativa  realizzata tramite focus group che ha coinvolto medici, infermieri, ostetriche e fisioterapisti della provincia di Bologna e medici, infermieri e fisioterapisti del Canton Ticino, Svizzera per far emergere le esperienze, i vissuti e le opinioni legate alle azioni educative sanitarie
description: The thesis analyzes the dialogue between two disciplines: pedagogy  and medical sciences. The aim is opening a series of practice  and methodological reflections to improve the  educational expertise in healthcare .
This educational research is divided in two parts: the first one regarding theories and models of educational care in health practice; the second one is an empirical research.
The focus on the first part is the epistemology of health and the educational care analyzing from perspective of  complexity.
The second part presents data from an explorative  research realized  through focus groups including doctors, nurses, midwives and physiotherapists in Bologna and doctors, nurses and physiotherapists in Switzerland (Canton Ticino)  to bring out experiences, viewpoint and actions about health education.
On the Parameter Estimation in the Schwartz-Smiths Two-Factor Model
Creators: name: Binkowski, Karol
name: He, Peilun
name: Kordzakhia, Nino
name: Shevchenko, Pavel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: The two unobservable state variables representing the short and long term factors introduced by Schwartz and Smith in [16] for risk-neutral pricing of futures contracts are modelled as two correlated Ornstein-Uhlenbeck processes. The Kalman Filter (KF) method has been implemented to estimate the short and long term factors jointly with un- known model parameters. The parameter identification problem arising within the likelihood function in the KF has been addressed by introduc- ing an additional constraint. The obtained model parameter estimates are the conditional Maximum Likelihood Estimators (MLEs) evaluated within the KF. Consistency of the conditional MLEs is studied. The methodology has been tested on simulated data.
Youth Unemployment in Zambia: Analyzing the Impact of Economic Growth and Development Policies on Employment Trends
Creators: name: Yangailo, Tryson
Publisher: name: Economia Aziendale Online -
Year: 2024
Subjects: Youth, Unemployment, Economic Growth, Policy

description: Addressing the multiple challenges faced by young people requires a multidisciplinary approach, particularly with regard to unemployment, which remains a critical political and socio-economic issue in Africa. This study examines the interaction between economic growth and youth unemployment in Zambia. Despite a declining national unemployment rate over the past two decades, Zambia's rapidly growing population adds new entrants to the labor force each year, exacerbating the challenge. Using World Bank data on GDP growth and youth unemployment rates from 1991 to 2023, the study analyzes the effectiveness of these policies in reducing youth unemployment. The results show a complex relationship between economic growth and youth employment. While economic recovery in the late 1990s led to a decline in youth unemployment, stable growth in the early 2000s did not prevent a subsequent increase in youth unemployment. Post-2010 data show a significant decline in youth unemployment, suggesting that targeted employment policies have been effective alongside stable economic growth. However, the impact of the COVID-19 pandemic on GDP growth was not matched by a significant increase in youth unemployment, likely due to government interventions. The study identifies persistent challenges such as limited access to finance, inadequate infrastructure and skills mismatches, but also highlights opportunities in the digital economy and public-private partnerships. The research underscores the need for a multi-pronged approach to youth unemployment, combining economic growth with targeted skills development and entrepreneurship support. Ensuring gender equality and inclusive policies are essential to maximize Zambia's demographic dividend. The study concludes with recommendations for improving youth empowerment programs, strengthening mentorship and internship opportunities, and developing robust monitoring frameworks to ensure the long-term sustainability and effectiveness of youth employment initiatives in Zambia.
description: Economia Aziendale Online -, Vol 15, No 3 (2024): ISSUE 3/2024
Epidemiology and population genetics of Podosphaera fusca and Golovinomyces orontii, causal agents of cucurbit powdery mildew
Creators: name: Pirondi, Alessandro <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: AGR/12 Patologia vegetale

description: In 2010, 2011 and 2012 growing seasons, the occurrence of the ascomycetes Podosphaera fusca and Golovinomyces orontii,  causal agents of powdery mildew disease, was monitored on cultivated cucurbits located in Bologna and Mantua provinces to determine the epidemiology of the species. To identify the pathogens, both morphological and molecular identifications were performed on infected leaf samples and a Multiplex-PCR was performed to identify the mating type genes of P. fusca isolates. The investigations indicated a temporal succession of the two species with the earlier infections caused by G. orontii, that seems to be the predominant species till the middle of July when it progressively disappears and P. fusca becomes the main species infecting cucurbits till the end of October. The temporal variation is likely due to the different overwintering strategies of the two species instead of climatic conditions. Only chasmothecia of P. fusca were recorded and mating type alleles ratio tended to be 1:1.
Considering that only chasmothecia of P. fusca were found, molecular-genetic analysis were carried out to find some evidence of recombination within this species by MLST and AFLP methods. Surprisingly, no variations were observed within isolates for the 8 MLST markers used. According to this result, AFLP analysis showed a high similarity within isolates, with SM similarity coefficient ranging between 0.91-1.00 and also, sequencing of 12 polymorphic bands revealed identity to some gene involved in mutation and selection. The results suggest that populations of P. fusca are likely to be a clonal population with some differences among isolates probably due to agricultural practices such as fungicides treatments and cultivated hosts. Therefore, asexual reproduction, producing a lot of fungal biomass that can be easily transported by wind, is the most common and useful way to the spread and colonization of the pathogen.
Modeling a striped pseudogap state
Creators: name: Granath, M.
name: Andersen, B. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the electronic structure within a system of phase-decoupled one-dimensional superconductors coexisting with stripe spin and charge density wave order. This system has a nodal Fermi surface (Fermi arc) in the form of a hole pocket and an antinodal pseudogap. The spectral function in the antinodes is approximately particle-hole symmetric contrary to the gapped regions just outside the pocket. We find that states at the Fermi energy are extended whereas states near the pseudogap energy have localization lengths as short as the inter-stripe spacing. We consider pairing which has either local d-wave or s-wave symmetry and find similar results in both cases, consistent with the pseudogap being an effect of local pair correlations. We suggest that this state is a stripe ordered caricature of the pseudogap phase in underdoped cuprates with coexisting spin-, charge-, and pair-density wave correlations. Lastly, we also model a superconducting state which 1) evolves smoothly from the pseudogap state, 2) has a signature subgap peak in the density of states, and 3) has the coherent pair density concentrated to the nodal region.
description: 12 pages, 12 figures, extended discussion, added references; v3, added figure of antinodal spectra for normal/pseudo/sc states
Elliptic systems and material interpenetration
Creators: name: Alessandrini, Giovanni
name: Nesi, Vincenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J55, 74B05

description: We classify the second order, linear, two by two systems for which the two fundamental theorems for planar harmonic mappings, the Rado'-Kneser-Choquet Theorem and the H. Lewy Theorem, hold. They are those which, up to a linear change of variable, can be written in diagonal form with the same operator on both diagonal blocks. In particular, we prove that the aforementioned Theorems cannot be extended to solutions of either the Lame' system of elasticity, or of elliptic systems in diagonal form, even with just slightly different operators for the two components.
description: 10 pages, two figures, submitted
Early litter access for pullets housed in aviary systems
Creators: name: EURCAW-Poultry-SFA
Publisher: name: Zenodo
Year: 2024
Subjects: chick
paper
foraging behaviour
injurious pecking
laying hens
litter trays
pullets
substrate

description: Early access to good quality litter facilitates fulfilment of the behavioural needs of layer chicks and prevents them from developing injurious pecking. When rearing pullets in an aviary system, the common practice is to lock the chicks into the aviary structure, i.e. the housing system, during the first 3-5 weeks. For the chicks to have access to litter during this period, special initiatives are needed. This factsheet provides examples of such initiatives, including egg trays and cardboard boxes filled with different types of substrates.
Spontaneous symmetry breaking in a generalized orbital compass model
Creators: name: Cincio, Lukasz
name: Dziarmaga, Jacek
name: Oles, Andrzej M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a generalized two-dimensional orbital compass model, which interpolates continuously from the classical Ising model to the orbital compass model with frustrated quantum interactions, and investigate it using the multiscale entanglement renormalization ansatz (MERA). The results demonstrate that increasing frustration of exchange interactions triggers a second order quantum phase transition to a degenerate symmetry broken state which minimizes one of the interactions in the orbital compass model. Using boson expansion within the spin-wave theory we unravel the physical mechanism of the symmetry breaking transition as promoted by weak quantum fluctuations and explain why this transition occurs only surprisingly close to the maximally frustrated interactions of the orbital compass model. The spin waves remain gapful at the critical point, and both the boson expansion and MERA do not find any algebraically decaying spin-spin correlations in the critical ground state.
description: 9 pages, 6 figures, improved presentation, version to appear in Phys. Rev. B
Additional file 5 of Effect of Streptococcus anginosus on biological response of tongue squamous cell carcinoma cells
Creators: name: Xu, Yuan
name: Jia, Yuhuan
name: Chen, Liang
name: Gao, Jing
name: Yang, DeQin
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Additional file 5. Original blot images.The autophagy-associated proteins levels of Beclin1, LC3I and LC3II were assessed using Western blot analysis, and normalized by GAPDH.
Additional file 4: of DnaJ homolog subfamily A member1 (DnaJ1) is a newly discovered anti-apoptotic protein regulated by azadirachtin in Sf9 cells
Creators: name: Shu, Benshui
name: Jia, Jianwen
name: Zhang, Jingjing
name: Sethuraman, Veeran
name: Yi, Xin
name: Zhong, Guohua
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Virology

description: Table S2. The matched peptide sequences of the identified proteins. (DOCX 14 kb)
Additional file 1 of Cross-sectional examination of characteristics of higher-dose buprenorphine prescriptions during the era of illicit fentanyl
Creators: name: Stein, Bradley D.
name: Sheng, Flora
name: Saloner, Brendan K.
name: Gordon, Adam J.
name: Merlin, Jessica S.
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Mental Health
subject: Virology

description: Supplementary Material 1
Additional file 5 of CRISPR/Cas9 mediated editing of the Quorn fungus Fusarium venenatum A3/5 by transient expression of Cas9 and sgRNAs targeting endogenous marker gene PKS12
Creators: name: Wilson, Fiona M.
name: Harrison, Richard J.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5: Table S5. Primers used in vector construction and PCR analysis of PKS12 gene variants.
Additional file 1 of The efficacy of an online exercise intervention for improving depressive symptoms among patients with subthreshold depression in primary care: protocol for a randomized controlled trial
Creators: name: Yu, Ken O. T.
name: Lee, Eric K. P.
name: Yip, Benjamin H. K.
name: Chan, Dicken C. C.
name: Mak, Winnie W. S.
name: Lee, Tatia M. C.
name: Tang, Wai Kwong
name: Leung, Maria K. W.
name: Hui, Stanley S. C.
name: Wong, Samuel Y. S.
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Supplementary Material 1.
Behavior of implanted Xe, Kr and Ar in nanodiamond and thin graphene stacks: experiment and modeling
Creators: name: Shiryaev, Andrey A.
name: Trigub, Alexander L.
name: Voronina, Ekaterina N.
name: Kvashnina, Kristina O.
name: Bukhovets, Valentin L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Implantation and subsequent behaviour of heavy noble gases (Ar, Kr, Xe) in few-layer graphene sheets and in nanodiamonds is studied both using computational methods and experimentally using X-ray absorption spectroscopy. X-ray absorption spectroscopy provides substantial support for the Xe-vacancy (Xe-V) defect as a main site for Xe in nanodiamond. It is shown that noble gases in thin graphene stacks distort the layers, forming bulges. The energy of an ion placed in between flat graphene sheets is notably lower than in domains with high curvature. However, if the ion is trapped in the curved domain, considerable additional energy is required to displace it.
description: Accepted to Physical Chemistry Chemical Physics