cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: What are the practices by some of Fortune 500 companies when designing sales training program?
Creators: name: Hamid, Mohd Ariff
Publisher: name: Electronic version published by Vancouver Island University
Year: 2021
Subjects: subject: Employees--Training of
subject: Sales personnel

description: The purpose of the present study was to investigate what strategies are being employed by some Fortune 500 companies when designing sales training program to ensure relevancy of training program in fulfilling the needs of customers demand and justifying firm’s investment in training programs. This study followed a mixed-method survey which was designed and accessible online via SurveyMonkey to collect both qualitative and quantitative data. The potential participants were chosen from a variety of settings including and not limited to sales organizations selling electronic products and services, computer’s hardware and software, online retailers, telecommunication companies, or health insurers. A snowball method was used to disseminate the invitation-to-participate in the study to maximize the participants’ pool. The primary goal of this study was to investigate what practices were used by some of the Fortune 500 companies in the design of sales training programs irrespective of inconsistencies in either the industry, selling cycle, selling method, or training content. The result of this study will provide insight into the rate of recurrence and variations of practices used to design sales training programs.
Giovanni Michelucci: i Nuovi Istituti di Matematica e Geometria
Creators: name: Inglese, Raffaella
name: Ferrari, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: ICAR/18 Storia dell'architettura

description: Il volume descrive il progetto più interessante realizzato a Bologna dall'architetto pistoiese Giovanni Michelucci (1891-1990) negli anni 1955-1965: i Nuovi Istituti di Matematica e Geometria, attuale sede del Dipartimento di Matematica in piazza di Porta San Donato. Raccoglie gli studi degli autori svolti per le rispettive Tesi di Dottorato.
Impact of Invasive Species on Guam's Forests: It's Worse Than You Think
Creators: name: Moore, Aubrey
Publisher: name: Zenodo
Year: 2019
Subjects: coconut rhinoceros beetle
Oryctes rhinoceros
Asian cycad scale
Aulacaspis yasumatsui

description: This article was published by the Pacific Daily News on February 24, 2019. One of several in a segment for National Invasive Species Week.
E-TUTORSHIPS AND E-LEARNING: RE-SKILLING LIBRARIANS FOR INTERACTIVE COMMUNICATION IN VIRTUAL ENVIRONMENTS
Creators: name: Comba, Valentina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: M-PED/03 Didattica e pedagogia speciale

description: In the Universities, Research and Health Institutions the need has become evident for high quality information literacy  in order to develop and support  high-level research, teaching and other services.
The University of Bologna launched an Information Literacy Project in 2003 to improve information skills at all levels. Librarians were involved in a course of “training for trainers” and in the production of Learning Objects/Tutorials for Students and Teachers. This experience was an interesting approach not only to a virtual environment, but also to the basics of pedagogical requirements of a good training course. 
 As a second example of this re-skilling perspective, the experience of a course, delivered in 2008, for hospital librarians as e-tutors on the Moodle platform is also be presented. The critical aspects of this initiative within traditional Italian Universities will be highlighted: the transition to a digital library-oriented profession is made difficult by national and local norms and behaviours. Moreover, technical aspects regarding barriers of access to e-learning content in hospital/university context will be analysed. In this context, it has been a real struggle  to develop new professional attitudes  based on effective communication skills.
La geografia della mediazione linguistico-culturale
Creators: name: Miller, Donna R.
name: Pano, Ana
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: L-LIN/14 Lingua e traduzione - Lingua tedesca
L-LIN/02 Didattica delle lingue moderne
L-LIN/04 Lingua e traduzione - Lingua francese
L-LIN/07 Lingua e traduzione - Lingua spagnola
L-LIN/12 Lingua e traduzione - Lingua inglese

description: I flussi migratori che stanno scuotendo e trasformando le nostre società incidono profondamente anche e soprattutto sul ruolo e sul concetto stesso di lingua. La lingua intesa come mezzo di comunicazione intra- e interculturale diventa sempre più e con maggior evidenza uno strumento di mediazione tra realtà spesso lontanissime –sia in senso geografico sia in senso culturale– dal quale dipende in larga misura l’esito di questo incontro/scontro di civiltà e culture. 
Il volume raccoglie una selezione degli interventi al convegno sulla Geografia della mediazione linguistico-culturale che il CeSLiC ha organizzato nel dicembre 2008. Mette in risalto tre assi principali attorno ai quali è possibile parlare di mediazione. Il primo verte sugli apporti anzitutto teorici allo stesso concetto di mediazione. Il secondo si concentra sulle applicazioni delle tesi sulla mediazione all’analisi linguistica e discorsiva, comprendendo anche la traduzione e la multimodalità. Questa sezione include anche un contributo dal campo, ossia quello del mediatore inteso come figura professionale. Il terzo invece offre diverse testimonianze dell’approccio mediatore nella didattica delle lingue e delle culture straniere.
Influence of internal structure on the motion of test bodies in extreme mass ratio situations
Creators: name: Steinhoff, Jan
name: Puetzfeld, Dirk
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the motion of test bodies with internal structure in General Relativity. With the help of a multipolar approximation method for extended test bodies we derive the equations of motion up to the quadrupolar order. The motion of pole-dipole and quadrupole test bodies is studied in the context of the Kerr geometry. For an explicit quadrupole model, which includes spin and tidal interactions, the motion in the equatorial plane is characterized by an effective potential and by the binding energy. We compare our findings to recent results for the conservative part of the self-force of bodies in extreme mass ratio situations. Possible implications for gravitational wave physics are outlined.
description: 23 pages, 6 figures, RevTex format
Parent-child shared reading : the affordances of print, digital, and hand-held electronic storybooks
Creators: name: Kim, Ji Eun
Publisher: name: University of British Columbia
Year: 2014

description: This study examines affordances of books involving different media in parent-child shared reading. Children and families increasingly use books and other literacy materials in digital format (Unsworth, 2006) in addition to those in traditional print/paper format. Although there have been studies about parent-child shared reading of digital books, the present study, by employing systemic functional linguistics (SFL) as the analytic tool, provides more in-depth and nuanced understandings of how different digital/physical features of books are related to types (e.g., questions) and processes (e.g., ways to build meanings) of parent-child interactions during shared reading. Based on Vygotsky’s socio-historical development theory and SFL, this study examines the verbal interactions of 20 dyads and their construction and negotiation of meanings while sharing of different books (one print [PB], one electronic [LB] and two digital books [DB1 and DB2]). The analysis revealed that the dyads used certain types of talk considered to encourage expansion of children’s thinking more often in the PB and LB contexts than in the other two contexts. Also, the dyads had more sustained interactions in the PB and LB contexts, which allowed them to negotiate meanings through these conversations and discussions. Furthermore, the foci of the dyads’ talk were different across the contexts: some digital features of the LB and DB1 appeared to lead the talk more towards technical aspects rather than towards the meaning of the stories. These findings further suggest that shared reading of different formats of books provide children with different learning opportunities. The study enhances our understanding of differences in parent-child verbal interactions, and of contextual elements, as well as the relationship between the two. These in-depth understandings suggest implications for the development of better quality digital books, and for more productive uses of digital books at home and school. Moreover, the study provides further evidence of an alternative way to examine parent-child verbal interactions (cf. Hasan, 1989; Williams, 1994) by utilizing SFL, which allows researchers to examine interactions (e.g., questioning) and contexts (e.g., focus of talk) in detail. This detailed examination, in turn, complements the analysis of language in Vygotsky’s theory.
On the X-rank with respect to linearly normal curves.
Creators: name: Ballico, Edoardo
name: Bernardi, Alessandra
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MAT/03 Geometria

description: In this paper we study the X-rank of points with respect to smooth linearly normal curves X contained in P^n of genus g and degree n+g. 
We prove that, for such a curve X, under certain circumstances, the X-rank of a general point of X-border rank equal to s is less or equal than n+1-s.
In the particular case of g=2 we give a complete description of the X-rank if n=3,4; while if  n is greter or equal than 5 we study the X-rank of points belonging to the tangential variety of X.
Preparation and characterization of CNT-based hierarchically structured electrodes for application in a fuel cell
Creators: name: Wang, Pei
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 540

description: Angesichts eines erheblichen Einflusses von Katalysatorträgern auf Leistung und Haltbarkeit in einer Polymerelektrolytmembran-Brennstoffzelle wurden hierarchisch strukturierte Katalysatorträger verwendet. Kohlenstoffnanoröhren (CNTs) oder Graphen wurden durch Bottom-up-Ansätze zur hierarchischen Struktur zusammengesetzt. CNTs wurden durch eine Abfolge von Eisen-Abscheidung und chemischer Gasphasenabscheidung auf der Oberfläche von kommerziellen CNTs, Glaskohlenstoff und reduziertem Graphenoxid auf Kohlenstoffgewebe abgeschieden, jeweils zur Bildung von hierarchischen Elektroden. Anschließend wurden Platin (Pt) Nanopartikel abgeschieden. Jeder Präparationsschritt wurde durch Rasterelektronen- oder Transmissionselektronenmikroskopie und Raman-Spektroskopie überprüft. Die hergestellten Elektroden zeigen eine erhöhte elektrochemische Pt-Oberfläche und eine verbesserte elektrochemische Leistung, u.a. in der Methanoloxidations- und Sauerstoffreduktionsreaktion.
description: Given the notable effect of catalyst supports on performance and durability in a polymer electrolyte membrane fuel cell, hierarchically structured catalyst supports were proposed. Carbon nanotubes (CNTs) or graphene were assembled to the hierarchical structure via bottom-up approaches. CNTs were deposited by a sequence of iron deposition and chemical vapor deposition on the surface of commercial CNTs, glassy carbon and reduced graphene oxide on carbon cloth, respectively, to form hierarchical electrodes. Afterwards, platinum (Pt) nanoparticles were deposited. Each preparation step was verified by scanning electron- or transmission electron microscopy and Raman spectroscopy. The prepared electrodes show increased Pt electrochemical surface area, and display improved electrochemical performance, e.g. in methanol oxidation- and oxygen reduction reaction.
«Militari apparenti». La Guardia Civica di Bologna per lo statuto fondamentale fra monarchia pontificia e cittadinanza
Creators: name: De Benedictis, Angela
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: SPS/03 Storia delle istituzioni politiche
M-STO/02 Storia moderna
SPS/02 Storia delle dottrine politiche
IUS/19 Storia del diritto medievale e moderno

description: Il contributo consta della relazione presentata al Convegno internazionale "Fra Cadice e Palermo. Nazione, Rivoluzione, Costituzione: rappresentanza politica, forme di governo, libertà garantite", svoltosi tra Palermo e Messina nei giorni 5-10 dicembre 2005.
Gli Atti sono in corso di preparazione a cura di Andrea Romano (Università di Messina, Facoltà di Scienze Politiche,  Dipartimento di Storia e Comparazione degli Ordinamenti Giuridici e Politici). Il contributo è stato consegnato per gli Atti nel maggio 2006 ed è stato accettato.
Il Convegno era stato organizzato dal DiSCOGiPo, Dipartimento di Storia e Comparazione degli Ordinamenti Giuridici e Politici dell’Università degli Studi di Messina; dal FSE, Fondo Sociale Europeo, Dottorato di Ricerca in Storia delle Istituzioni Politiche e Giuridiche dell’Età Medievale e Moderna; dal CIDRI-EMD, European Master’s Degree, Dottorato Internazionale in Storia e Comparazione delle Istituzioni Giuridiche e Politiche dei Paesi dell’Europa Mediterranea.
Il Convegno era articolato in 10 sessioni.
I sessione. "Costituzioni e costituzionalismi: quasi una premessa".
II sessione. "Da Cadice a Palermo: miti e costituzioni per l’Europa e l’America".
III sessione. "Governo, amministrazione, decentralizzazione.
IV sessione. Rivoluzioni, procedure giudiziarie, buon governo".
V sessione. "La costituzione siciliana del 1812 e la sua percezione europea".
VI sessione. "Costituzionalismi, sovranità, cittadinanza".
VII sessione. "Governi, parlamenti, rappresentanza politica".
VIII sessione. "Educazione pubblica, pubblica opinione, difesa nazionale".
IX sessione. "Costituzionalismi autoctoni, difesa della costituzione".
X sessione. "La costituzione spagnola del 1812 e la sua percezione europea".
La relazione "«Militari apparenti». La Guardia Civica di Bologna per lo statuto fondamentale fra monarchia pontificia e cittadinanza" era inserita nella sezione VIII: Educazione pubblica, pubblica opinione, difesa nazionale (9 dicembre 2005, Messina, Aula Magna dell’Università – Palazzo dell’Ateneo – Piazza Salvatore Pugliatti 1).
Accuracy and Stability of Filters for Dissipative PDEs
Creators: name: Brett, C. E. A.
name: Lam, K. F.
name: Law, K. J. H.
name: McCormick, D. S.
name: Scott, M. R.
name: Stuart, A. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Data assimilation methodologies are designed to incorporate noisy observations of a physical system into an underlying model in order to infer the properties of the state of the system. Filters refer to a class of data assimilation algorithms designed to update the estimation of the state as data is acquired sequentially. For linear problems subject to Gaussian noise filtering can be performed exactly using the Kalman filter. For nonlinear systems it can be approximated in a systematic way by particle filters. However in high dimensions these particle filtering methods can break down. Hence, for the large nonlinear systems arising in applications such as oceanography and weather forecasting, various ad hoc filters are used, based on Gaussian approximations. In this work, we study the accuracy and stability of these ad hoc filters in the context of the 2D incompressible Navier-Stokes equation. The ideas readily generalize to a range of dissipative partial differential equations (PDEs). By working in this infinite dimensional setting we provide an analysis which is useful for the understanding of high dimensional filtering, and is robust to mesh-refinement. We describe theoretical results showing that, in the small observational noise limit, the filters can be tuned to perform accurately in tracking the signal itself (filter accuracy), provided the system is observed in a sufficiently large low dimensional space; roughly speaking this space should be large enough to contain the unstable modes of the linearized dynamics. The tuning corresponds to what is known as variance inflation in the applied literature. Numerical results are given which illustrate the theory. The positive results herein concerning filter stability complement recent numerical studies which demonstrate that the ad hoc filters can perform poorly in reproducing statistical variation about the true signal.
description: arXiv admin note: substantial text overlap with arXiv:1110.2527
On the design of high-voltage analog front-end circuits for capacitive micromachined ultrasonic transducers (CMUT)
Creators: name: Behnamfar, Parisa
Publisher: name: University of British Columbia
Year: 2014

description: In ultrasound imaging, capacitive micromachined ultrasonic transducer (CMUT) technology has become a promising alternative to conventional piezoelectric- based technology. This work focuses on various aspects of CMUT-based imaging technologies. In the context of CMUT design and integration with associated electronics, flexible and reliable CMUT models that can be seamlessly simulated with the read-out circuits and provide insights in the system-level performance are of great importance. This work proposes a generic Verilog-AMS model for CMUT sensors that takes into account the non-linearities, dynamic behavior and harmonic resonances of the CMUT. This model is able to provide reliable estimations of the pull-in voltage as well as the resonance frequency and the spring softening effect. To improve the signal-to-noise ratio (SNR), integrating the CMUT transducer with the front-end electronics is critical. Design and implementation of a comprehensive analog front-end system in a 0.8μm high-voltage CMOS technology which includes high-voltage and fast-switching transmitters as well as low-power variable-gain receivers is presented. Co-simulation of the front-end electronics and the CMUT model demonstrates full system functionality. Experimental results of the system at the transmit mode confirm the reliability of this co-simulation. An on-chip adaptive biasing unit (ABU) is also included in the design which aims to improve the CMUT receive sensitivity. The ABU consists of a DC-DC converter to generate a range of bias voltage levels and a digital control unit to select the desired voltage. Co- simulation of the ABU with the Verilog-AMS model confirms the increase in the CMUT sensitivity in receive mode. In the context of CMUT super-resolution imaging, we present the design of a transceiver circuit in a 0.35μm high-voltage CMOS technology that supports both the fundamental and asymmetric modes of operation. The transmitter provides high- voltage pulses to the CMUT electrodes. The receiver includes transimpedance analog adders to add the fundamental mode in-phase signals as well as differential amplifiers to combine the out-of-phase signals of the asymmetric modes. Furthermore, low- power variable-gain stages are included to amplify the resulting signals and facilitate interfacing to the ultrasound imaging machine for additional processing and display. The design functionality is confirmed by experimental results.
title: Karl Dziatzko [1842-1903]
title: Nekrolog
titleType: Subtitle
Creators: name: Pietschmann, Richard
Publisher: name: Zentralbibliothek Zürich
Year: 1903
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Dziatzko, Karl

description: Sonderdruck aus: Chronik der Georg-August-Universität zu Göttingen, 1902.
Eignung von Konzentrations- und Integritätsmessungen zellfreier Plasma-DNA als Biomarker zur Differenzierung von malignen und benignen Lungenerkrankungen
Creators: name: Wagner, Julia
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Neben dem Nachweis genetischer und epigenetischer Alterationen eignet sich zellfreie DNA (cfDNA) auch für Konzentrations- und Integritätsmessungen. Bei Tumorpatienten wurden erhöhte cfDNAKonzentrations- und Integritätswerte im Vergleich zu Gesunden nachgewiesen. In dieser Arbeit wurde die Eignung von cfDNA-Konzentrations- und Integritätsmessungen als Biomarker zur Differenzierung von malignen und benignen Lungenerkrankungen untersucht. Aus Plasmaproben von 227 Patienten wurde cfDNA isoliert und die cfDNA-Konzentration von 3 ERV3-Fragmenten mittels quantitativer Real-Time-PCR bestimmt. Die cfDNA-Integrität wurde mit 2 Kalkulationsmethoden berechnet. Es wurden keine relevanten cfDNA-Konzentrations- und Integritätsunterschiede zwischen Lungenkarzinompatienten, Patienten mit benignen Lungenerkrankungen und Patienten mit einer anderen Tumorerkrankung als dem Bronchialkarzinom nachgewiesen. cfDNA-Konzentrations- und Integritätsmessungen waren als diagnostische Biomarker ungeeignet.
description: Cancer-related genetic and epigenetic alterations can be detected in cell free DNA (cfDNA). Furthermore, analyses of cfDNA concentrations and integrity can be used as potential diagnostic tools. Tumor patients showed an increase in quantity and integrity of cfDNA compared to healthy control groups. This study analyzed if cfDNA quantity and integrity measurements could serve as a diagnostic biomarker to distinguish lung cancer patients from patients with benign lung diseases. For this reason, cfDNA was isolated from plasma of 227 patients and cfDNA was amplified by real-time PCR. The quantity of 3 ERV3-fragments was determined and cfDNA integrity was calculated with 2 different methods. There were no differences found in cfDNA quantity and integrity between patients with lung cancer, patients with benign lung diseases and patients with other tumor diseases than lung cancer. Therefore, measurements of cfDNA quantity and integrity were found to be not useful as diagnostic biomarkers.
Products of pairs of Dehn twists and maximal real Lefschetz fibrations
Creators: name: Degtyarev, Alex
name: Salepci, Nermin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 57M60 (Primary) 20F36, 11F06 (Secondary)

description: We address the problem of existence and uniqueness of a factorization of a given element of the modular group into a product of two Dehn twists. As a geometric application, we conclude that any maximal real elliptic Lefschetz fibration is algebraic.
description: Final version accepted for publication
title:  Iris Murdoch lettrice critica della “Existential Philosophy” di J.-P. Sartre
Creators: name: Meletti Bertolini  ,  Mara
Publisher: name: RomaTrE-Press
Year: 2023

description: According to I. Murdoch, the critical confrontation with J.-P. Sartre’s existentialism (La Nausée, L’Être et le Néant) is crucial in order to propose a different moral psychology, able to question the primary role that both analytic and continental philosophy attributed to will and choice. This project shows interesting similarities with some theses expressed by H. Arendt in her last work, The Life of the Mind. Murdoch and Arendt have the common goal of redefining the conception of mind in order to renew moral and political philosophy. Sartre’s thought, in its first existentialist phase, provided critical stimuli to develop thisproject.

Secondo I. Murdoch, il confronto critico con l'esistenzialismo di J.-P. Sartre (La Nausée, L'Être et le Néant) è fondamentale per proporre una diversa psicologia morale, in grado di mettere in discussione il ruolo primario che la filosofia analitica e quella continentale attribuiscono alla volontà e alla scelta. Questo progetto presenta interessanti analogie con alcune tesi espresse da H. Arendt nella sua ultima opera, La vita della mente. Murdoch e Arendt hanno l'obiettivo comune di ridefinire la concezione della mente per rinnovare la filosofia morale e politica. Il pensiero di Sartre, nella sua prima fase esistenzialista, ha fornito stimoli critici per sviluppare questo progetto.
description: Studi Sartriani – XVII/2023 – L’essere e il nulla. L’esistenzialismo di Sartre 80 anni dopo
Non-uniform interpolatory curve subdivision with edge parameters built-upon compactly supported cardinal splines
Creators: name: Beccari, Carolina
name: Casciola, Giulio
name: Romani, Lucia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MAT/08 Analisi numerica

description: In this paper we present a family of Non-Uniform Local Interpolatory (NULI) subdivision schemes, derived from
compactly supported cardinal splines with non-uniform knots (NULICS). For this spline family, the knot partition is
defined by a sequence of break points and by one additional knot, arbitrarily placed along each knot-interval. The
resulting refinement algorithms are linear and turn out to contain a set of edge parameters that, when fixed to a value in the range [0,1], allow us to move each auxiliary knot to any position between the break points to simulate the behavior of the NULICS interpolants. Among all the members of this new family of schemes, we will then especially analyze the NULI 4-point refinement. This subdivision scheme has all the fundamental features of the quadratic cardinal spline basis it is originated from, namely compact support, C1 smoothness, second order polynomials reproduction and approximation order 3. In addition the NULI 4-point subdivision algorithm has the possibility of setting consecutive edge parameters to simulate triple knots - that are not achievable when using the corresponding spline basis - thus allowing for limit curves with crease vertices, without using an ad hoc mask. Numerical examples and comparisons with other methods will be given to the aim of illustrating the performance of the NULI 4-point scheme in the case of highly non-uniform initial data.
Pyroelektrische Röntgenquellen zur Materialanalyse
Creators: name: Wilke, Markus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: Werkstoffuntersuchung
subject: Röntgenquellen
subject: Materialanalyse
subject: 620.11272

description: Die Nutzung des pyroelektrischen Effekts bietet die Möglichkeit zur Emission und gerichteten Beschleunigung von Elektronen. Dieser Vorgang kann wiederum zur Erzeugung von Röntgenstrahlung genutzt werden. Die vorliegende Arbeit beschreibt experimentelle Grundlagenuntersuchungen zur Auslegung solcher pyroelektrischer Röntgenquellen zur Anwendung im Bereich der Materialanalytik. Anhand von zwei Kristallsystemen (LiTaO3 und LiNbO3) wurde dabei eine systematische Betrachtung wesentlicher Einflussfaktoren auf die Intensität und die Energie der emittierten Röntgenstrahlung durchgeführt. Unter anderem wurden die Auswirkungen der Änderung von Arbeitsdruck, Kristallgeometrie, Targetmaterial und Targetanordnung betrachtet. Die Auswertung erfolgte unter Nutzung energiedispersiver Röntgenspektren sowie der Messungen des Elektronenstroms und der Äquivalenzdosisleistung. Nachfolgend wurden die Möglichkeiten und Grenzen der Nutzung im Bereich der Materialanalytik anhand integraler und lokaler Elementanalysen an verschiedenen metallischen und nichtmetallischen Probenmaterialien experimentell untersucht. Die so erarbeiteten Erkenntnisse zur anwendungsbezogenen Auslegung pyroelektrischer Röntgenquellen wurden für die Entwicklung eines Prototypen als Kombination aus Lichtmikroskop und Gerät zur Röntgenfluoreszenzanalyse genutzt.
description: The pyroelectric effect can be used for the emission and directional acceleration of electrons. Subsequently this process can be used to generate X-rays. The present work describes experimental investigations for the design of pyroelectric X-ray sources for possible applications in the field of materials analysis. A systematic examination of essential influencing factors on the intensity and energy of the emitted X-rays was carried out using LiTaO3 und LiNbO3 crystals. Working pressure, crystal geometry, target materials, target arrangement and additional factors were taken into account. The evaluation was carried out using energy-dispersive X-ray spectra as well as measurements of the electron current and the equivalent dose rate. In the following, the possibilities and limitations of an application in the field of materials analysis were experimentally investigated. Therefore area and local elemental analyses of various metallic and non-metallic samples were made. The knowledge gained on the application-related design of pyroelectric X-ray sources was used for the development of a prototype as a combination of optical microscopy and a device for X-ray fluorescence analysis.
Polynomial-based non-uniform interpolatory subdivision with features control
Creators: name: Beccari, Carolina
name: Casciola, Giulio
name: Romani, Lucia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MAT/08 Analisi numerica

description: Starting from a well-known construction of polynomial-based interpolatory 4-point schemes, in this paper we present
an original affine combination of quadratic polynomial samples that leads to a non-uniform 4-point scheme with edge
parameters. This blending-type formulation is then further generalized to provide a powerful subdivision algorithm
that combines the fairing curve of a non-uniform refinement with the advantages of a shape-controlled interpolation
method and an arbitrary point insertion rule. The result is a non-uniform interpolatory 4-point scheme that is unique
in combining a number of distinctive properties. In fact it generates visually-pleasing limit curves where special
features ranging from cusps and flat edges to point/edge tension effects may be included without creating undesired
undulations. Moreover such a scheme is capable of inserting new points at any positions of existing intervals, so that
the most convenient parameter values may be chosen as well as the intervals for insertion.
Such a fully flexible curve scheme is a fundamental step towards the construction of high-quality interpolatory subdivision surfaces with features control.
A boundary estimate for non-negative solutions to Kolmogorov operators in non-divergence form
Creators: name: Cinti, Chiara
name: Nystrom, Kaj
name: Polidoro, Sergio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MAT/05 Analisi matematica

description: We consider non-negative solutions to a class of second order degenerate Kolmogorov operators L in non-divergence form, defined in a bounded open domain Omega contained in R^{N+1}. Let K be a compact subset of the closure of Omega, let z be a point of Omega, and let Sigma be a subset of the boundary of Omega. We give sufficient geometric conditions for the validity of the following Carleson type estimate: There exists a positive constant C, depending only on the Kolmogorov operator L, on Omega, Sigma, K and z, such that
sup_K u < C u(z),
for every non-negative solution u of Lu = 0 in Omega such that u vanishes on Sigma.
Analyse der thermischen Leistungsfähigkeit neuartiger Modulkonzepte unter Verwendung anorganischer Verkapselungsmaterialien
Creators: name: Behrendt, Stefan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 530

description: Die Verkapselung von leistungselektronischen Modulen wird heutzutage mit Polymeren umgesetzt. Die oben genannten Materialien bieten neben ihren dielektrischen Eigenschaften keinerlei technische Vorteile für den Einsatz in einem leistungselektronischen Modul. Es kommt hierbei zu einem technologischen Flaschenhals. Anorganische Materialien liefern hier einen vielversprechenden Ansatz. In der vorliegenden Arbeit wird der Einsatz von anorganischen Vergussmassen anhand von Zuverlässigkeitsuntersuchungen analysiert und bewertet. Weiterhin wird untersucht, welchen Einfluss die erhöhte thermische Leitfähigkeit eines solchen Verkapselungsmaterials auf die Halbleitertemperatur und damit den thermischen Widerstand des Moduls hat. Auf Grundlage dieser Erkenntnisse werden alternative Modulkonzepte entwickelt, welche die Entwärmung des Moduls optimieren. Hierdurch wird der thermische Widerstand der Baugruppe signifikant reduziert, was die Leistungsfähigkeit bzw. die Lebensdauer des Moduls erhöht.
description: The encapsulation of power electronic modules is nowadays realized with polymers. In addition to their dielectric properties, the above-mentioned materials offer no technical advantages for use in power electronic modules. This results in a technological bottleneck. Inorganic materials offer a promising approach here. In the presented work, the use of inorganic encapsulation materials is analysed and evaluated on the basis of reliability tests. Furthermore, it is investigated what influence the increased thermal conductivity of such an encapsulation material has on the semiconductor temperature and thus the thermal resistance of the module. Based on these findings, alternative module concepts are developed that optimise the heat dissipation of the module. This significantly reduces the thermal resistance of the module, which increases the performance and lifetime of the module.
A pseudoexponentiation-like structure on the algebraic numbers
Creators: name: Mantova, Vincenzo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C60, 08C10, 12L12

description: Pseudoexponential fields are exponential fields similar to complex exponentiation satisfying the Schanuel Property, which is the abstract statement of Schanuel's Conjecture, and an adapted form of existential closure. Here we show that if we remove the Schanuel Property and just care about existential closure, it is possible to create several existentially closed exponential functions on the algebraic numbers that still have similarities with complex exponentiation. The main difficulties are related to the arithmetic of algebraic numbers, and they can be overcome with known results about specialisations of multiplicatively independent functions on algebraic varieties.
description: 8 pages. Several stylistic edits and updated bibliography
Component identification and estimation in nonlinear high-dimensional regression models by structural adaption
Creators: name: Samarov, Alexander
name: Spokoiny, Vladimir
name: Vial, Celine
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: structural adaptation
subject: partially linear model
subject: component analysis
subject: 62H30
subject: 62J02

description: This article proposes a new method of analysis of a partially linear model whose nonlinear component is completely unknown. The target of analysis is identification of the set of regressors which enter in a nonlinear way in the model function, and the complete estimation of the model including slope coefficients of the linear component and the link function of the nonlinear component. The procedure also allows for selecting the significant regression variables. As a by-product, we develop a test of linear hypothesis against a partially linear alternative, or, more generally, a test that the nonlinear component is M-dimensional for M = 0,1,2,.... The approach proposed in this article is fully adaptive to the unknown model structure and applies under mild conditions on the model. The only important assumption is that the dimensionality of nonlinear component is relatively small. The theoretical results indicate that the procedure provides a prescribed level of the identification error and estimates the linear component with the accuracy of order 푛-1/2. A numerical study demonstrates a very good performance of the method even for small or moderate sample sizes.
Contract teachers and student achievement in rural China: evidence from class fixed effects
Creators: name: Lei, Wang
name: Li, Mengjie
name: Zhang, Siqi
name: Sun, Yonglei
name: Sylvia, Sean
name: Yang, Enyan
name: Ma, Guangrong
name: Zhang, Linxiu
name: Mo, Di
name: Rozelle, Scott
name: Lei, Wang
name: Li, Mengjie
name: Zhang, Siqi
name: Sun, Yonglei
name: Sylvia, Sean
name: Yang, Enyan
name: Ma, Guangrong
name: Zhang, Linxiu
name: Mo, Di
name: Rozelle, Scott
Publisher: name: Unknown
Year: 2018
Subjects: subject: Labor and Human Capital
subject: China
subject: contract teachers
subject: primary education
subject: student achievement

description: For schooling to play an important role in the development of human capital, the system of education needs to provide quality education, which among other things requires high-quality teachers. Facing fiscal constraints and growing enrolments, school systems in developing countries often supplement their teaching staff by hiring contract teachers. However, there is limited evidence on how the effectiveness of these teachers compares to that of civil service teachers. We use a dataset from rural primary schools in western China to estimate the causal effect of contract teachers on student achievement and find that gains in student scores on standardised examinations in mathematics and Chinese are less in classes taught by contract teachers than in classes taught by civil service teachers. The results demonstrate that China’s education system needs to focus on producing high-quality teachers to improve the quality of schooling in its rural education system. The findings imply that educators in developing countries should not only seek to hire increasingly more civil service teachers in rural schools, but they should also identify ways of improving the quality of contract teachers. If efforts to improve teaching can succeed, rural students can learn more, earn higher incomes and contribute more to the productivity of the overall economy.
Gallup Poll # 1967-0749: Race Relations
Creators: name: Gallup
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Lyndon Johnson job performance (1); most important problem facing the country (1); political party best able to handle problems (1); Johnson job performance on Vietnam (1); Johnson Administration and racial integration (1); gun control (2); 1968 presidential election (6); race relations/discrimination (2); areas where respondent would be afraid to walk alone at night within one mile of home (2); respect for police in local area (1); police brutality (1); race and living situations (3); 1964 presidential election (1); church attendance (1).
Magnetic-non-magnetic superlattice chain with external electric field: Spin transport and the selective switching effect
Creators: name: Dey, Moumita
name: Maiti, Santanu K.
name: Karmakar, S. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Based on Green's function formalism, the existence of multiple mobility edges in a one-dimensional magnetic-non-magnetic superlattice geometry in presence of external electric field is predicted, and, it leads to the possibility of getting a metal-insulator transition at multiple values of Fermi energy. The role of electric field on electron localization is discussed for different arrangements of magnetic and non-magnetic atomic sites in the chain. We also analyze that the model quantum system can be used as a perfect spin filter for a wide range of energy.
description: 6 pages, 6 figures (An invited regular article)
Evidenzbasierte Einführung der atraumatischen 29-gauge Nadel für Amniozentese
Creators: name: Gatopoulos, Georgios
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2018
Subjects: subject: 610

description: Die Punktionseigenschaften zwischen den 22 G Standardnadeln (0,7 mm) und den 29 G Nadeln (0,34 mm) wurden verglichen. 17 menschliche chorioamniotische Membranen wurden direkt nach einem Kaiserschnitt punktiert, wobei eine 22 G Nadel sowie eine 29 G Nadel unter In-vitro-Bedingungen verwendet wurden. Das Punktionsgebiet wurde durch Zuhilfenahme eines Mikroskops bestimmt und das Volumen der entweichenden Flüssigkeit über einen Zeitraum von 5 min gemessen. Beachtliche Unterschiede wurden beobachtet: Aus der Membranpunktion mit der 22 G Nadel resultierte eine durchschnittlich beschädigte Oberfläche von 225.147,4 μm2, ein Loch mit einer durchschnittlichen Größe von 50.154 μm2 sowie ein Durchfluss des Fruchtwassers von 17,5 ml/5 min, während die 29 G Nadel lediglich eine durchschnittlich beschädigte Oberfläche von 114.812,4 μm2, ein Loch mit einer durchschnittlichen Größe von 1382,5 μm2 sowie einen Durchfluss des Fruchtwassers von 0,28 ml/5 min verursachte. Das Loch, welches bei der Membranpunktion mit einer 29 G “pencil-point” Nadel für die Amniozentese entsteht, ist 36-mal kleiner und der Fruchtwasserverlust 61-mal geringer als bei der Membranpunktion mit einer 22 G Standardnadel. Mit der 29-G-Nadel wird eine signifikante Verringerung der Komplikationen nach der Amniozentese erwartet.
description: Perforation characteristics of standard 22 G (0.7 mm) to 29 G needle (0.34 mm) for amniocentesis have been compared. Seventeen human chorio-amnion membranes were perforated immediately after cesarean section using 22 G needle for spinal anesthesia and 29 G "pencil-point" needles for amniocentesis under in-vitro conditions. Area of perforation was determined using a microscope and volume of fluid leakage was measured over a period of 5 min. Membrane perforation with the 22 G needle resulted in a mean damaged area of 225,147.4 μm(2), a hole with a mean area of 50,154 μm(2) and amniotic fluid volume passage of 17.5 mL/5 min, whereas the 29 G needle generated a mean damaged area of 114,812.4 μm(2), a hole with an average area of 1382.5 μm(2) and volume passage of 0.28 mL/5 min. These differences were significant. The hole formed by membrane perforation with 29 G "pencil-point" needle for amniocentesis is 36 times smaller, and the amniotic fluid loss is 61 times less than that measured with the 22 G standard needle for spinal anesthesia. Significant reduction of complications following amniocentesis is expected with the 29 G needle.
Making triangulations 4-connected using flips
Creators: name: Bose, Prosenjit
name: Jansens, Dana
name: van Renssen, André
name: Saumell, Maria
name: Verdonschot, Sander
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: We show that any combinatorial triangulation on n vertices can be transformed into a 4-connected one using at most floor((3n - 9)/5) edge flips. We also give an example of an infinite family of triangulations that requires this many flips to be made 4-connected, showing that our bound is tight. In addition, for n >= 19, we improve the upper bound on the number of flips required to transform any 4-connected triangulation into the canonical triangulation (the triangulation with two dominant vertices), matching the known lower bound of 2n - 15. Our results imply a new upper bound on the diameter of the flip graph of 5.2n - 33.6, improving on the previous best known bound of 6n - 30.
description: 22 pages, 8 figures. Accepted to CGTA special issue for CCCG 2011. Conference version available at http://2011.cccg.ca/PDFschedule/papers/paper34.pdf
Portrait of Thomas Moran, by Stephen Ferris
Creators: name: Ferris, Stephen
name: Rowe, Noel
Publisher: name: Unknown
Year: 1881
Subjects: Charcoal drawings
Portrait drawings
Moran, Thomas, 1837-1926

description: Copied photograph of "Portrait of Thomas Moran", a charcoal drawing by American artist Stephen Ferris (Thomas Moran's brother-in-law).
Instabilities of wormholes and regular black holes supported by a phantom scalar field
Creators: name: Bronnikov, K. A.
name: Konoplya, R. A.
name: Zhidenko, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We test the stability of various wormholes and black holes supported by a scalar field with a negative kinetic term. The general axial perturbations and the monopole type of polar perturbations are considered in the linear approximation. Two classes of objects are considered: (i) wormholes with flat asymptotic behavior at one end and AdS on the other (M-AdS wormholes) and (ii) regular black holes with asymptotically de Sitter expansion far beyond the horizon (the so-called black universes). A difficulty in such stability studies is that the effective potential for perturbations forms an infinite wall at throats, if any. Its regularization is in general possible only by numerical methods, and such a method is suggested in a general form and used in the present paper. As a result, we have shown that all configurations under study are unstable under spherically symmetric perturbations, except for a special class of black universes where the event horizon coincides with the minimum of the area function. For this stable family, the frequencies of quasinormal modes of axial perturbations are calculated.
description: 12 pages, 9 figures. Final version published in PRD. Eqs (29) and (30) corrected
Interaction-driven topological and nematic phases on the Lieb lattice
Creators: name: Tsai, Wei-Feng
name: Fang, Chen
name: Yao, Hong
name: Hu, JiangPing
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that topological states are often developed in two dimensional semimetals with quadratic band crossing points (BCPs) by electron-electron interactions. To illustrate this, we construct a concrete model with the BCP on an extended Lieb lattice and investigate the interaction-driven topological instabilities. We find that the BCP is marginally unstable against infinitesimal repulsions. Depending on the interaction strengths, topological quantum anomalous/spin Hall, charge nematic, and nematic-spin-nematic phases, develop separately. Possible physical realizations of quadratic BCPs are provided.
description: 14 pages, 14 figures, published version
Characterization of age-related changes within the lysine acetylation pattern of immune effector cells
Creators: name: Toma, Georgiana
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Im Laufe der Zeit ist der menschliche Organismus mehr Krankheitserregern ausgesetzt. Dadurch verringert sich die Reserve an naiven T-Zellen. Deacetylase-Inhibitoren (HDACis) wurden zur Behandlung einer Vielzahl an Krankheiten. Deshalb ist es unabdingbar, das Zusammenspiel zwischen Acetylierung und Alterung innerhalb von T-Zellen zu untersuchen. Zu diesem Zweck wurden CD8+-T-Zellen von jungen und alten Blutspendern isoliert und mit HDACi behandelt. Die funktionellen Auswirkungen auf T-Zellen Aktivierung wurden anschließend mittels biomolekularer Vorgehensweisen beurteilt. Es wurde eine Korrelation zwischen der HDACi-Behandlung und der Aktivierung von T-Zellen festgestellt. Während eine Erhöhung der Acetylierung die Apoptoserate der Zellen nicht stört, verändert sie das Cytoskelett und die Signalproteine.
description: Over time, the human organism is exposed to pathogens, which reduces the reserve of naïve T cells. Deacetylase inhibitors (HDACis) are used to treat a wide range of conditions. Therefore, this work studies the interplay between acetylation and aging within T cells. To this end, CD8+ T cells were isolated from young and old donors and treated with HDACi. The functional effects on T cell activation were then evaluated through biomolecular approaches. To better understand the intracellular outcome of acetylation, high-throughput transcript analysis and protein expression profiles were also performed, along with the relative protein and transcript expression of proteins participating in the signaling pathways involved in the activation and differentiation of T cells. A correlation was found between HDACi treatment and T cell activation. While an increase in acetylation does not disturb the apoptosis rate of the cells, it alters the cytoskeleton and signaling proteins.