cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Educational Policy: Egalitarian or Elitist?
Creators: name: Grossman, Herschel I.
name: Kim, Minseong
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1999
Subjects: SECS-P/02 Politica economica

description: This paper offers an explanation for observed differences across countries in educational policies and in resulting interpersonal distributions of human capital.We analyse a general equilibrium m del in which,as a result of the apportionment of natural ability,nurturing,and publicly financed education,some people can be well endowed with human capital,whereas other people are poorly endowed with human capital.We assume that people can choose to be either producers or predators.Because an increase in a person ’s human capital makes predation a less attractive choice for that person,it is possible that by using some of their human capital to educate the poorly endowed people the well endowed people can increase their own consumption.More interestingly,our theory predicts that,if producers are able to enforce a collective choice that takes advantage of the deterrent effect of allocating resources to guarding against predators,then the well endowed people prefer a relatively egalitarian educational policy that increases the human capital of all f the poorly endowed people.Such an educational policy either decreases the cost of deterring predation or makes deterrence possible.In contrast,if producers or small subsets f producers individually choose the amount of their resources to allocate to guarding,taking the ratio of predators to producers as given,then the well endowed people prefer an elitist educational policy that,if it has a redistributional component,decreases the number of poorly endowed people,thereby decreasing the number of predators,without increasing the human capital of the remaining poorly endowed people. These implications seem to be consistent with the facts about differences across countries in educational policy.
Sensitivity of the Atlantic Meridional Overturning Circulation to South Atlantic freshwater anomalies
Creators: name: Cimatoribus, Andrea A.
name: Toom, Matthijs den
name: Drijfhout, Sybren S.
name: Dijkstra, Henk A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The sensitivity of the Atlantic Meridional Overturning Circulation (AMOC) to changes in basin integrated net evaporation is highly dependent on the zonal salinity contrast at the southern border of the Atlantic. Biases in the freshwater budget strongly affect the stability of the AMOC in numerical models. The impact of these biases is investigated, by adding local anomaly patterns in the South Atlantic to the freshwater fluxes at the surface. These anomalies impact the freshwater and salt transport by the different components of the ocean circulation, in particular the basin--scale salt--advection feedback, completely changing the response of the AMOC to arbitrary perturbations. It is found that an appropriate dipole anomaly pattern at the southern border of the Atlantic Ocean can collapse the AMOC entirely even without a further hosing. The results suggest a new view on the stability of the AMOC, controlled by processes in the South Atlantic.
description: The final publication is available at springerlink.com Climate Dynamics, Volume 39, Numbers 9-10 (2012), 2291-2306
Chiloschiza Moser 1924
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Chiloschiza

description: Chiloschiza Moser, 1924b
[1 species].
Type species Chiloschiza clypealis Moser, 1924, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Pedagogical thoughts on knowing bodies : the teacher educator encounters the Elder and the Phronimos
Creators: name: Jeannie, Kerr
Publisher: name: University of British Columbia
Year: 2013

description: My dissertation is a study into the notion of embodied knowledge and is written from my perspective as a Settler-scholar studying and working at the University of British Columbia on unceded Coast Salish territory. In this dissertation I propose and develop a theoretical framework for teaching and learning working from Karen Barad’s theory of agential realism that locates the real bodies of teachers and learners in the real places in which they exist. This framework emerges from my experience of teaching children, youth and adults in public schools, and my dialectical engagement with theory and practice over an extended period of time in this place. The core concept in this framework of the transformative pedagogical encounter considers the material and discursive aspects of the learning context, and attends to the centrality of embodied presence and ethical responsiveness in creating the conditions for transformative learning. To inform my theorization, I engage in Gadamerian hermeneutic analysis of both Aristotelian texts related to the embodied wisdom of the Phronimos, and of texts by Indigenous scholars in BC related to the embodied wisdom of the Elder. I draw on these texts as counter-perspective and challenge to the dominance of Western modernist theories and practices in education, and through coloniality scholarship argue that the lack of attention to the body in educational theorizing is related to historic and contemporary forms of privilege and oppression. I locate this study in teacher education and recognize that it is a place where hegemonic narratives and epistemological orientations might be drawn out and questioned. I explore the complicated conversation, as originally discussed by William Pinar that emerges from bringing Indigenous perspectives into meaningful engagement with mainstream teacher education. I consider the resistance of teacher candidates and educational structures to this conversation, and suggest self-reflexive practices that engage transparently with resistance and draw out the problematic narratives and discourses in a Settler dominated society. I recommend practices of social equity in teacher education that provide opportunity for teacher candidates and instructors to understand themselves in complex ethical relations and as actively participating in material and discursive practices in real places.
I consumi alimentari delle famiglie italiane: un modello per le decisioni di consumo extradomestico utilizzando i microdati di spesa familiare
Creators: name: Montini, Anna
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1999
Subjects: SECS-P/01 Economia politica

description: In questo lavoro si analizzano i comportamenti di spesa delle famiglie italiane in riferimento, in particolare, ai consumi alimentari extradomestici. I "pasti e consumazioni fuori casa" hanno assunto negli ultimi anni una maggiore importanza se valutati rispetto alla spesa alimentare complessiva la quale, a fronte di un generale innalzamento del benessere, vede ridurre la propria quota sul consumo totale. Le ragioni del mutamento della struttura interna al consumo alimentare complessivo vanno ricercate nei cambiamenti nella struttura settoriale dell’occupazione, nella maggiore partecipazione delle donne nella forza lavoro ed anche nel significato culturale assunto dal pasto fuori casa. L’utilizzo dei dati individuali di spesa, del campione dell’indagine annuale ISTAT sui consumi delle famiglie (ca. 22.000 famiglie nel 1996), ha permesso la formulazione di un modello microeconomico modellizzando la decisione di spesa, in base anche ai più recenti contributi in letteratura, come un processo decisionale a due stadi. In questo modo è possibile analizzare l’influenza delle caratteristiche socio-economiche delle famiglie sia sullo stadio di decisione della partecipazione alla spesa sia sullo stadio di decisione del livello di spesa.
CMB Distortions from Superconducting Cosmic Strings
Creators: name: Tashiro, Hiroyuki
name: Sabancilar, Eray
name: Vachaspati, Tanmay
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reconsider the effect of electromagnetic radiation from superconducting strings on cosmic microwave background (CMB) mu- and y-distortions and derive present (COBE-FIRAS) and future (PIXIE) constraints on the string tension, mu_s, and electric current, I. We show that absence of distortions of the CMB in PIXIE will impose strong constraints on mu_s and I, leaving the possibility of light strings (G mu_s < 10^{-18}) or relatively weak currents (I < 10 TeV).
description: 10pages, 5 figures, Submitted to PRD, v2:References added, replaced to match the PRD version
Ein datengetriebenes System auf Basis klinischer Pfade zur Entscheidungsunterstützung für Ressourcenplanung in Krankenhäusern - Prozess-Mining, Optimierung und Simulation
Creators: name: Helbig, Karsten
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2016
Subjects: subject: 330

description: Ohne weitere Effizienzsteigerungen sind Krankenhäuser in Deutschland langfristig weder dem finanziellenDruck noch den Herausforderungen des demographischen Wandels gewachsen. Zur Unterstützung von Ressourcenkapazitätsentscheidungen auf strategischer, taktischer und operativer Ebene wird in dieser Dissertation ein datengetriebenes generisches Krankenhausentscheidungsunterstützungssystems konzipiert.Es besteht aus den Modulen Daten- und Prozess-Mining sowieOptimierung und Simulation. Im Rahmen dieser Module werden konkrete Werkzeuge zur automatischen Gewinnung planbarer klinischer Pfade für elektive Behandlungen, zur automatischen Planung vollständiger elektiver Behandlungen sowie zur Evaluation von Veränderungen im Einsatz krankenhausinterner Ressourcen entwickelt. Alle Werkzeuge werden anhand praxisnaher Fallstudien unter Betrachtung von Mikrostrukturen und unter Verwendung nach § 21 KHEntgG standardisierter Krankenhausdaten implementiert und erfolgreich evaluiert.
description: Without further enhancements in resource efficiency, German hospitals are not capable of meeting the future financial and patient-centered care challenges..This thesis proposesa concept for a generic data driven decision support system for strategical, tactical and operational resource capacity panning problems for German hospitals. The system consists of three linked modules: Data- and process mining, optimization and simulation. Furthermore, integrated tools to automatically obtain scheduling-focused clinical pathways for elective patients, to automatically schedule the entire treatment process of elective inpatients and to evaluate changes in handling clinical resources are developed. All tools are implemented and successfully evaluated on the basis of practical case studies, respecting microstructures of clinical processes and resource allocation as well as using standardized clinical data corresponding to § 21 KHEntgG.
Does Gibrat’s law hold in the case of young, small firms?
Creators: name: Lotti, Francesca
name: Santarelli, Enrico
name: Vivarelli, Marco
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1999
Subjects: SECS-P/02 Politica economica

description: According to Gibrat’s Law of Proportionate Effect, the growth rate of a given firm is independent of its size at the beginning of the examined period. This paper investigates whether Gibrat’s Law holds for new entrants in a given industry: that is for new small firms in the early stage of their life cycle. The main finding is that in some (but not in all) selected industries in Italian manufacturing Gibrat’s Law fails to hold in the years immediately following start-up, when smaller firms have to rush in order to achieve a size large enough to enhance their likelihood of survival. Conversely, in subsequent years the patterns of growth of smaller firms do not differ significantly from those of larger ones, and the Law is therefore confirmed.
Orbital polaron in double exchange ferromagnets
Creators: name: Berg, T. L. Van den
name: Lombardo, P.
name: Kuzian, R. O.
name: Hayn, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the spectral properties of the two-orbital Hubbard model, including the double hopping term, by means of the dynamical mean field method. This Hamiltonian describes materials in which ferromagnetism is realized by the double exchange mechanism, like for instance manganites, nickelates or diluted magnetic semiconductors. The spectral function of the unoccupied states is characterized by a specific equidistant three peak structure. We emphasize the importance of the double hopping term on the spectral properties. We show the existence of a ferromagnetic phase due to electron doping near n=1 by the double exchange mechanism. A quasi-particle excitation at the Fermi energy is found that we attribute to what we will call an orbital polaron. We derive an effective spin-pseudospin Hamiltonian for the two-orbital double exchange model at n=1 filling to explain the existence and dynamics of this quasi-particle.
description: 11 pages, 8 figures
Spread Decoding in Extension Fields
Creators: name: Manganiello, Felice
name: Trautmann, Anna-Lena
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A spread code is a set of vector spaces of a fixed dimension over a finite field Fq with certain properties used for random network coding. It can be constructed in different ways which lead to different decoding algorithms. In this work we present a new representation of spread codes with a minimum distance decoding algorithm which is efficient when the codewords, the received space and the error space have small dimension.
description: Submitted for publication to Finite Fields and their Applications (Elsevier)
Higher-order ratios of baryon number cumulants
Creators: name: Schaefer, Bernd-Jochen
name: Wagner, Mathias
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The relevance of higher order cumulants of net baryon number fluctuations for the analysis of freeze-out and critical conditions in heavy-ion collisions at LHC and RHIC is addressed. The sign structure of the higher order cumulants in the vicinity of the chiral crossover temperature might be a sensitive probe and may allow to elucidate their relation to the QCD phase transition. We calculate ratios of generalized quark-number susceptibilities to high orders in three flavor QCD-like models and investigate their sign structure close to the chiral crossover line.
description: presented at the International Conference "Critical Point and Onset of Deconfinement - CPOD 2011", Wuhan, November 7-11, 2011; version to appear in Cent. Eur. J. Phys
Cnemoschiza Decelle 1979
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Cnemoschiza

description: Cnemoschiza Decelle, 1979
[1 species].
Type species Cnemoschiza tibialis Decelle, 1979, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
The automobile technological systems. An empirical analysis of four European countries
Creators: name: Leoncini, Riccardo
name: Montresor, Sandro
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1999
Subjects: SECS-P/01 Economia politica

description: The aim of this paper is to study the automobile industry of the most important European countries (France, Germany, Great Britain and Italy) from a sectoral, system perspective. The main relationships within and between the building blocks constituting the automobile technological system are mapped and evaluated, both in cross-sectional and in temporal terms. The importance of the sectoral TS as the unit of our analysis appears evident at both levels. Some general sectoral properties emerge, which however hold in the four countries to a different extent, thus suggesting how the institutional set-up works as a differentiating element. A sustained process of change in the various elements of the automobile TS is detected, nevertheless resulting in a relatively stable path of development. The countries considered reveal different patterns of motor vehicles trade specialisation in different geographical areas, with changes over time. Also foreign direct investments show the existence of very different trajectories and outward/inward balances.
Gauge invariance of DVCS off an arbitrary spin hadron: the deuteron target case
Creators: name: Anikin, I. V.
name: Pasechnik, R. S.
name: Pire, B.
name: Teryaev, O. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using twist 3 contributions and the relations, which emanate from the QCD equations of motion, we derive the gauge invariant amplitude for the deeply virtual Compton scattering (DVCS) off hadron with an arbitrary spin. We emphasize that our derivation is not based on a certain parametrization of the relevant hadron matrix elements of the quark(gluon) operators. As an application, we present the gauge invariant amplitude for the DVCS off spin-one hadron. Using the derived gauge invariant amplitude, the single spin asymmetry is discussed.
description: 9 pages, altered version
Quasi-3D coupled electro-optical simulation of MQW avalanche waveguide photodetectors
Creators: name: Nespola, A.
name: Goano, M.
name: Ghione, G.
name: Haidar, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: The physics-based modeling of InAlAs/InGaAs waveguide MQW avalanche photodiodes is addressed through a coupled electro-optical quasi-3D approach, based on selfconsistent application of drift-diffusion simulation and the effective refractive index method. The application of the model to two recently proposed waveguide MQW APD structures shows a good agreement with experimental results.
Generation of high-power picosecond laser pulses
Creators: name: Biernat, A.
name: Korapa, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: We present a method of highly dynamic carrier injection into the active zone of a Fabry-Perot laser structure, which enables us to modulate the optical refractive index of the optical waveguide. We will demonstrate experimentally, that the optical refractive index can be changed in such a way, that the laser diode emits light pulses with FWHM around five to ten times smaller and optical peak power up to two orders of magnitude larger than by using normal carrier injection. These extremely improved losing characteristics using cheap and easy to manufacture devices are of great interest for sensor applications.
Adjustable pulse shaping filter with active impedance matching for optical soliton communication systems
Creators: name: Monteiro, Paulo P.
name: Antunes, Pedro L.
name: Lima, Mario J.
name: Da Rocha, Jose F.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: It will be presented the design and the experimental results of a monolithic post-detection filter suitable for a 10 Gbit/s optical soliton receiver. The main advantages are full integration, electrical tunability and active input and output impedance match.
Coelogenia Moser 1913
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Coelogenia

description: Coelogenia Moser, 1913b
[2 species].
Type species Coelogenia flavida Moser, 1913, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Enhanced performance of InP/InGaAs HBT phototransistor with an improved base contact design
Creators: name: Thuret, J.
name: Gonzalez, C.
name: Riet, M.
name: Benchimol, J.L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: We report the electrical and photoresponse characteristics of InP/InGaAs HBT phototransistor (HPT) according to the base contact configuration. It is shown that improved base contact design can provide optical gain Gopt, and unit optical gain cut-off frequency fc very near to the current gain H21 and unit current gain cut-off frequency ft, of the phototransistor H21 and ft being the upper limit performances of the HPT. fc = 42 GHz for ft = 55 GHz, (i.e. a fc/ft ratio  = 0.76) were obtained for the type-B phototransistor. Equivalent circuit analysis shows good agreement with experimental results.
Pacific[ations] : security, nonviolence, and the 'war on drugs' in Mérida, Yucatán, 2007-2012
Creators: name: Patchin, Paige M.
Publisher: name: University of British Columbia
Year: 2013

description: Drug-related conflict has perhaps been the central question of Mexican politics since President Felipe Calderón initiated the "war on drugs" in 2006. From 2007-2012, military and police presence in everyday life deepened across the country, and tens of thousands of people were killed. It in opposition to this scene of extreme violence that Mérida, Yucatán was relentlessly celebrated as the most secure city in Mexico, the "City of Peace." Through interviews with government officials and activists in Mérida, this thesis explores reverberations between i) the politics of Mérida's continuing declaration of nonviolence; ii) the mobilization of the abstract concept of security; and iii) the reconfiguration of state power under the "war on drugs." Chapter 2 explains the policies and practices enacted by Mexican and U.S. governments under the anti-drug banner. The ways in which life and landscapes in Yucatán were re-organized around protection against drug-related conflict is the subject of Chapter 3. This, what I term securitization, attempted to bring the circulation of bodies, drugs, and rumors in Mérida under control for the sake of the security and reproduction of the state. Chapter 4 explores the relationship between securitization, the story of nonviolence, and colonial identity categories. Here, I argue that the "City of Peace" is premised on the formation of pacified state subjects. These storylines converge in my central argument: constructions of nonviolence in Mérida from 2007-2012 were bound up with many different forms of state violence, ranging from the use of brute force to the quiet restriction of everyday conduct.
Thermal runaway analysis for velocity-matched distributed photodetectors
Creators: name: Nespola, A.
name: Chau, T.
name: Wu, M.C.
name: Ghione, G.
name: Naldi, C.U.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: The thermal runaway process for long wavelength velocity-matched distributed photodetectors (VMDP) with metal-semiconductor-metal photodiodes has been studied. We developed a numerical, three-dimensional electro­thermal model taking into account the nonlinearity of the substrate thermal properties and the nonuniform temperature rise due to self-heating. The analysis shows that the distributed nature of the photodetector allows it to work at high power level before catastrophic failure occurs. Examples are discussed to highlight the thermal behaviour of the distributed detector and to compare the model with experimental data.
Two-component Coulomb Glass in Disordered Superconducting Films
Creators: name: Mitchell, Joe
name: Gangopadhyay, Anirban
name: Galitski, Victor
name: Mueller, Markus
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by evidence of local electron-electron attraction in experiments on disordered insulating films, we propose a new two-component Coulomb glass model that combines strong disorder and long-range Coulomb repulsion with the additional possibility of local pockets of a short-range inter-electron attraction. This model hosts a variety of interesting phenomena, in particular a crucial modification of the Coulomb gap previously believed to be universal. Tuning the short-range interaction to be repulsive, we find non-monotonic humps in the density of states within the Coulomb gap. We further study variable-range hopping transport in such systems by extending the standard resistor network approach to include the motion of both single electrons and local pairs. In certain parameter regimes the competition between these two types of carriers results in a distinct peak in resistance as a function of the local attraction strength, which can be tuned by a magnetic field.
description: 12 pages, 6 figures
Physical mechanisms limiting the manufacturing yield of millimeter-wave power InP HEMTs
Creators: name: Krupenin, S.
name: Blanchard, R. R.
name: Somerville, M. H.
name: Del Alamo, J. A.
name: Duh, K. G.
name: Chao, P. C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: We have developed a methodology to diagnose the physical mechanisms limiting the manufacturing yield of millimeter-wave power InAlAs/InGaAs HEMTs on InP. A statistical analysis was carried out on DC figures of merit obtained from a large number of actual devices on an experimental wafer. Correlation studies and a Principal Component Analysis (PCA) of the results indicated that variations in Si delta-doping concentration introduced during MBE accounted for more than half of the manufacturing variance. Variations in the gate-source distance that is determined by the electron-beam alignment in the gate formation process were the second leading source of manufacturing variance.
Coniopholis Erichson 1847
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Coniopholis

description: Coniopholis Erichson, 1847b
[8 species].
Type species Coniopholis lepidiota Burmeister, 1855, by subsequent monotypy.
Note: Burmeister (1855) incorrectly spelt Coniopholis as “ Coneopholis ”.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
The potential role that biofuels might play in China's future transportation needs
Creators: name: Li, Ling
Publisher: name: University of British Columbia
Year: 2013

description: From 1980 to 2010 China’s energy use increased six fold to 2430 Mtoe/yr and it is projected to further increase by about 50% to 3359 Mtoe/yr by 2020. Currently renewable energy, such as bioenergy, hydro, solar and wind, contributes less than 9% of this total. During China’s “industrial revolution” phase of economic growth (in the 1970/80’s), coal was the major source of power and electricity with oil and natural gas playing a much lesser role. More recently, due to the rapid increase in the number of motorized vehicles, the country has gone from oil self-sufficiency in the early 1960’s to importing more than 271 Mt/yr of oil in 2012. China’s biofuels industry is in its infancy with its current bioethanol production (primarily from corn) at 2.5 GL/yr and biodiesel production (primarily from waste cooking oil) at 0.4 GL/yr. Although the national goal is to produce 12.7 GL bioethanol and 2.3 GL of biodiesel by 2020, the potential for growth of so-called first generation or conventional biofuels is very limited due to food-vs-fuels concerns and China’s desire to be as self-sufficient as possible in food production. Thus, research, development and demonstration (RD&D) is being encouraged to grow and process so-called one-and-a-half generation crops such as sweet sorghum with a goal of producing 9 GL of ethanol by utilizing 40% of the available marginal land. However, to date, few plantation or conversion facilities have been built. Regarding so-called second-generation facilities, China has the potential to annually produce 22 GL of cellulosic ethanol by utilizing 15% of its 874 Mt agricultural residues. This could increase to 29 GL bioethanol by 2020, using 15% of the 1150 Mt residue that is anticipated to be available at that time. Biodiesel growth is expected to be achieved by growing oil-bearing trees with the potential of producing 2.5-6.7 GL/yr grown on 10% of the available marginal land. However, it is unlikely that biofuels will contribute substantially to China’s transport sector and that, even with aggressive importation, biofuels will play a relatively minor role for quite some time.
Theory of nonequilibrium dynamics of multiband superconductors
Creators: name: Akbari, Alireza
name: Schnyder, Andreas P.
name: Manske, Dirk
name: Eremin, Ilya
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the nonequilibrium dynamics of multiband BCS superconductors subjected to ultrashort pump pulses. Using density-matrix theory, the time evolution of the Bogoliubov quasiparticle densities and the superconducting order parameters are computed as a function of pump pulse frequency, duration, and intensity. Focusing on two-band superconductors, we consider two different model systems. The first one, relevant for iron-based superconductors, describes two-band superconductors with a repulsive interband interaction $V_{12}$ which is much larger than the intraband pairing terms. The second model, relevant for MgB$_2$, deals with the opposite limit where the intraband interactions are dominant and the interband pair scattering $V_{12}$ is weak but attractive. For ultrashort pump pulses, both of these models exhibit a nonadiabatic behavior which is characterized by oscillations of the superconducting order parameters. We find that for nonvanishing $V_{12}$, the superconducting gap on each band exhibits two oscillatory frequencies which are determined by the long-time asymptotic values of the gaps. The relative strength of these two frequency components depends sensitively on the magnitude of the interband interaction $V_{12}$.
description: 6 pages, 3 figures
DC, low frequency and RF drift in AlGaAs/InGaAs PM-HEMTs biased in high field and high power dissipation regime
Creators: name: Meneghesso, G.
name: Paccagnella, A.
name: Martines, G.
name: Garat, F.
name: Crosato, C.
name: Zanoni, E.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: In this work we analyze degradation phenomena observed in pseudomorphic AlGaAs/InGaAs HEMTs with Al/Ti gate metallization, which have been submitted to accelerated tests at high drain-source voltage VDS and high power dissipation PD. After these tests, we observe permanent degradation effects, consisting in electron trapping in the gate-drain access region, with consequent decrease in the longitudinal electric field and 'breakdown walkout', and. in thermally-activated interdiffusion of the Al/Ti gate with decrease in the gate Schottky barrier height and increase in drain saturation current ID Rather than causing a degradation of the rf characteristics of the device, these phenomena induce an increase in the associated rf gain at 12 GHz, the other rf characteristics being almost unchanged. Overall, the most relevant failure mode observed is an increase of low-frequency transconductance.
Real-time measurement of InP HEMT'S during large-signal RF overdrive stress
Creators: name: Schreurs, D.
name: Van Der Zanden, K.
name: Verspecht, J.
name: De Raedt, W.
name: Nauwelaers, B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: We show that the "Nonlinear Network Measurement System" allows to accurately measure the real-time degradation of microwave active devices under large-signal RF overdrive stress. This new kind of measurements gives a better insight in the failure mechanisms. We present results of both off- and on-state degradation of InP based HEMT's.
Statistical techniques for MMIC design sensitivity and chip yield analysis
Creators: name: Marsh, S.P.
name: Long, A.P.
name: Wadsworth, S.D.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper describes the first application of Taguchi SDOE to the sensitivity analysis of a MMIC amplifier. The technique demonstrates clearly which of the simulated performance parameters, including the one dB compression point derived from non-linear simulation, are sensitive to which of the device matching elements. The adaptability of the Taguchi technique is also demonstrated by applying it to the tolerance analysis of the same MMIC. Correlation of some of the HEMT parameters is now taken into account by the analysis, and the results are compared to those obtained by a fully correlated database sampling technique.
Quantum transport efficiency and Fourier's law
Creators: name: Manzano, Daniel
name: Tiersch, Markus
name: Asadian, Ali
name: Briegel, Hans J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze the steady-state energy transfer in a chain of coupled two-level systems connecting two thermal reservoirs. Through an analytic treatment we find that the energy current is independent of the system size, hence violating Fourier's law of heat conduction. The classical diffusive behavior in Fourier's law of heat conduction can be recovered by introducing decoherence to the quantum systems constituting the chain. Implications of these results on energy transfer in biological light harvesting systems, and the role of quantum coherences and entanglement are discussed.
description: 6 pages, 4 figures
Correlation between kink effect and frequency dispersion in pseudomorphic HEMTs
Creators: name: Reynoso-Hernandez, J. A.
name: Plana, R.
name: Escotte, L.
name: Graffeuil, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper presents DC and AC frequency dispersion effects of the drain-source output impedance in commercially available pseudomorphic HEMTs. Inductive behaviour observed on the imaginary part of the drain-source impedance is attributed to deep traps in the GaAs substrate from DC and AC measurements versus temperature. On the other hand. DC and AC measurements indicate that kink effect signature is related to impact ionisation at the drain edge of the gate followed by trapping-detrapping processes in the substrate.
Crepischiza Brenske 1903
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Crepischiza

description: Crepischiza Brenske, 1903b
[6 species].
Type species Crepischiza usambarae Brenske, 1903, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 133, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Reduced operator algebras of trace-preserving quantum automorphism groups
Creators: name: Brannan, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Let $B$ be a finite dimensional C$^\ast$-algebra equipped with its canonical trace induced by the regular representation of $B$ on itself. In this paper, we study various properties of the trace-preserving quantum automorphism group $\G$ of $B$. We prove that the discrete dual quantum group $\hG$ has the property of rapid decay, the reduced von Neumann algebra $L^\infty(\G)$ has the Haagerup property and is solid, and that $L^\infty(\G)$ is (in most cases) a prime type II$_1$-factor. As applications of these and other results, we deduce the metric approximation property, exactness, simplicity and uniqueness of trace for the reduced $C^\ast$-algebra $C_r(\G)$, and the existence of a multiplier-bounded approximate identity for the convolution algebra $L^1(\G)$.
description: Section 6 removed and replaced by a more general solidity result
title: A transgression for the sake of God—‘Averah Li-shmah
title: a tale of a radical idea in Talmudic literature
titleType: Subtitle
Creators: name: Blankovsky, Yuval
Publisher: name: Universität Potsdam
Year: 2019

description: The Babylonian Talmud (BT) attributes the idea of committing a transgression for the sake of God to R. Nahman b. Isaac (RNBI). RNBI's statement appears in two parallel sugyot in the BT (Nazir 23a; Horayot 10a). Each sugya has four textual witnesses. By comparing these textual witnesses, this paper will attempt to reconstruct the sugya's earlier (or, what some might term, original) dialectical form, from which the two familiar versions of the text in Nazir and Horayot evolved. This article reveals the specific ways in which, value-laden conceptualizations have a major impact on the Talmud's formulation, as we know it today.
description: Postprints der Universität Potsdam : Philosophische Reihe, 160
title: The Kenya rift revisited
title: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling
titleType: Subtitle
Creators: name: Sippel, Judith
name: Meeßen, Christian
name: Cacace, Mauro
name: Mechie, James
name: Fishwick, Stewart
name: Heine, Christian
name: Scheck-Wenderoth, Magdalena
name: Strecker, Manfred R.
Publisher: name: Universität Potsdam
Year: 2019

description: We present three-dimensional (3-D) models that describe the present-day thermal and rheological state of the lithosphere of the greater Kenya rift region aiming at a better understanding of the rift evolution, with a particular focus on plume-lithosphere interactions. The key methodology applied is the 3-D integration of diverse geological and geophysical observations using gravity modelling. Accordingly, the resulting lithospheric-scale 3-D density model is consistent with (i) reviewed descriptions of lithological variations in the sedimentary and volcanic cover, (ii) known trends in crust and mantle seismic velocities as revealed by seismic and seismological data and (iii) the observed gravity field. This data-based model is the first to image a 3-D density configuration of the crystalline crust for the entire region of Kenya and northern Tanzania. An upper and a basal crustal layer are differentiated, each composed of several domains of different average densities. We interpret these domains to trace back to the Precambrian terrane amalgamation associated with the East African Orogeny and to magmatic processes during Mesozoic and Cenozoic rifting phases. In combination with seismic velocities, the densities of these crustal domains indicate compositional differences. The derived lithological trends have been used to parameterise steady-state thermal and rheological models. These models indicate that crustal and mantle temperatures decrease from the Kenya rift in the west to eastern Kenya, while the integrated strength of the lithosphere increases. Thereby, the detailed strength configuration appears strongly controlled by the complex inherited crustal structure, which may have been decisive for the onset, localisation and propagation of rifting.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 644
Magnetic field induced inequivalent vortex zero modes in strained graphene
Creators: name: Roy, Bitan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Zero energy states in the Dirac spectrum with U(1) symmetric massive vortices of various underlying insulating orders in strained graphene are constructed in the presence of the magnetic field. An easy plane vortex of antiferromagnet and quantum spin Hall orders host two zero energy states, however, with two different length scales. Such inequivalent zero modes can lead to oscillatory charge and magnetization, and their usual quantizations get restored only far from the vortex core. Otherwise, these zero modes can be delocalized from each other by tuning the mutual strength of two fields. One can, therefore, effectively bind a single zero mode in the vortex core. A possible experimental set up to capture signature of this theory in real graphene as well as in optical honeycomb lattices is mentioned. Generalization of this scenario with underlying topological defects of Kekule superconductors can localize a single Majorana mode in the vicinity of the defect-core.
description: 7 Pages, 1 Figure, revised Manuscript with streamlined presentation, technical details, enriched discussion, updated references; PRB published version
Necessary conditions for discontinuities of multidimensional size functions
Creators: name: Cerri, Andrea
name: Frosini, Patrizio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: MAT/03 Geometria

description: Some new results about multidimensional Topological Persistence are presented, proving that the discontinuity points of a $k$-dimensional size function are necessarily related to the pseudocritical values of the associated measuring function.
Estimation of Quasi-Rational DSGE monetary models
Creators: name: Fanelli, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/05 Econometria

description: This paper proposes the estimation of small-scale dynamic stochastic general equilibrium (DSGE) monetary models under the quasi-rational expectations (QRE) hypothesis. The QRE-DSGE model is based on the idea that the determinate reduced form solution associated with the structural model, if it exists, must have the same lag structure as the ‘best fitting’ vector autoregressive (VAR) model for the observed time series. After discussing solution properties and the local identifiability of the model, a likelihood-based iterative algorithm for estimating the structural parameters and testing the data adequacy of the system is proposed. A Monte Carlo experiment shows that, even controlling for the omitted dynamics bias, the over-rejection of the nonlinear cross-equation restrictions when asymptotic critical values are used and variables are highly persistent is a relevant issue in finite samples. An application based on euro area data illustrates the advantages of using error-correcting formulations of the QRE-DSGE model when the inflation rate and the short-term interest rate are approximated as difference stationary processes. A parametric bootstrap version of the likelihood-ratio test for the implied cross-equation restrictions does not reject the estimated QRE-DSGE model.
Torsion and accelerating expansion of the universe in quadratic gravitation
Creators: name: Chee, Guoying
name: Guo, Yongxin
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Several exact cosmological solutions of a metric-affine theory of gravity with two torsion functions are presented. These solutions give a essentially different explanation from the one in most of previous works to the cause of the accelerating cosmological expansion and the origin of the torsion of the spacetime. These solutions can be divided into two classes. The solutions in the first class define the critical points of a dynamical system representing an asymptotically stable de Sitter spacetime. The solutions in the second class have exact analytic expressions which have never been found in the literature. The acceleration equation of the universe in general relativity is only a special case of them. These solutions indicate that even in vacuum the spacetime can be endowed with torsion, which means that the torsion of the spacetime has an intrinsic nature and a geometric origin. In these solutions the acceleration of the cosmological expansion is due to either the scalar torsion or the pseudoscalar torsion function. Neither a cosmological constant nor dark energy is needed. It is the torsion of the spacetime that causes the accelerating expansion of the universe in vacuum. All the effects of the inflation, the acceleration and the phase transformation from deceleration to acceleration can be explained by these solutions. Furthermore, the energy and pressure of the matter without spin can produce the torsion of the spacetime and make the expansion of the universe decelerate as well as accelerate.
description: 20 pages. arXiv admin note: text overlap with gr-qc/0604006, arXiv:1110.3449