cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Centrosema plumieri Benth.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Centrosema
Centrosema plumieri

description: 51. Centrosema plumieri (Turpin ex Pers.) Benth.
Mexico, Central America, Caribbean, Venezuela, Ecuador, Guyanas, Peru, Bolivia, Brazil (from Roraima to São Paulo) and introduced in Tropical Africa (Aymard et al. 1999).
Selected Voucher:—Piedade, 19 December 2007, Araújo et al. 520 (UFP).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 19, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
MMICS in the USA-Status and modeling issues
Creators: name: Pucel, R. A.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: Significant developments in microwave device modeling and monolithic microwave integrated circuit (MMIC) technology have transpired in the USA (during the last 3-4 years. These developments have been broad-based, encompassing both materials and device technology in a manufacturing environment as well as component and device modeling, off- and on-wafer testing, CAD software development and packaging among others. Much of the impetus for this progress has been the substantial funding under the Microwave- and Millimeter-wave Integrated Circuit (MIMIC) program managed by the Defense Advanced Research Projects Agency (DARPA) and administered by the Tri-Service Agencies. Other important developments, outside of this effort, also have taken place, especially in HBT device and circuit design, as well as in civilian applications of MMICs such as GPS and wireless cable. This presentation is a status review of some of the highlights in MMIC development in the USA during the last several years both within and outside of the MIMIC program. Also to be addressed are the major modeling issues that need be resolved to make possible high performance, low cost MMICs a reality.
A compact X-band GaAs monolithic balanced FET mixer
Creators: name: Robertson, I. D.
name: Aghvami, A. H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: In this paper, a novel monolithic balanced FET mixer is described, which has a measured conversion gain of ldB over 5 to 12 GHz. A new circuit technique has been developed which gives both high performance and low complexity. As a result, the mixer is expected to find applications in state-of-the-art monolithic subsystems for communications and radar. The technique employed is to use a passive lumped-element Wilkinson combiner feeding a common-source/common-gate FET pair. The FETs operate as both active balun and mixer elements, giving a very compact balanced mixer. After an exhaustive investigation of MMIC mixers, this new technique is thought to be the optimum blend of active and passive circuitry. As a result, the mixer has the same simplicity and ease-of-use associated with existing double-balanced diode mixers, but in addition has conversion gain and can be directly integrated into MMIC subsystems.
GaAs-monolithic IC's for an X-band crystal-stabilized source
Creators: name: Allamando, Etienna Andre
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: A   M.M.I.C.   realization   of   voltage controlled oscillator (V.C.O.)  for  X-BAND  application  and frequency stabilization is presented Fig.l. Conventional V.C.O. is based on the association of a Ga As MESFET and a varactor diode followed by a buffer amplifier.Among them ,an original one is proposed here:it is mainly based on the suppression of the varactor diode.Instead , the variations of a HEMT gate-to-source capacitance allow to realize frequency variation on the oscillator.This approach offers good frequency stability,low tuning sensitivity to temperature,low phase noise and obviously simpler design. On the other hand,the .present configuration of the microwave oscillator can be used to realize an injection-locked oscillator.For this purpose, we suggest an alternative approach for the design of stabilized microwave source without cavity-stabilization , such as dielectric resonator (DRSO) , or phase locked loop (PLL) system in order to obtain both simpler design and good performance such : high temperature stability and linear amplitude modulation with low cost and small size.
Predicting the compressive strength of a quaternary blend concrete using Bayesian regularized neural network
Creators: name: Imam, Ashhad
name: Salami, Babatunde Abiodun
name: Oyehan, Tajudeen Adeyinka
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy

description: Concrete produced with ordinary Portland cement (OPC) along with insertion of supplementary materials increases the level of nonlinearity. Due to this increased non-linearity and difficulty in modeling numerically, the focus has increased on the exploration of computational intelligent models like artificial neural network (ANN) to estimate different concrete properties. In this study, a quaternary blend concrete was developed with OPC, fly ash (FA), metakaolin (MK) and rice husk ash (RHA). The experimental data were further used in training the proposed ANN models to approximate its compressive strength. The proposed neural network models were trained and optimized using three different regularization algorithms; the scaled conjugate gradient “trainsc” (SCG), Levenberg–Marquardt “trainlm” (LM) and Bayesian regularized “trainbr” (BR) algorithms. The percent proportion of OPC, FA, MK and RHA making up the quaternary blends and curing days are the five features used as input variables, while the compressive strength of each of the individual concrete mixture is the output variable (target). It was found out that ANN optimized with Bayesian regularization function performed best with the highest correlation coefficient, and lowest MAE, MSE and RMSE. The results obtained from the ANN approach show significant improvement with the experimental observations.
Last passage percolation and traveling fronts
Creators: name: Comets, Francis
name: Quastel, Jeremy
name: Ramirez, Alejandro F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a system of N particles with a stochastic dynamics introduced by Brunet and Derrida. The particles can be interpreted as last passage times in directed percolation on {1,...,N} of mean-field type. The particles remain grouped and move like a traveling wave, subject to discretization and driven by a random noise. As N increases, we obtain estimates for the speed of the front and its profile, for different laws of the driving noise. The Gumbel distribution plays a central role for the particle jumps, and we show that the scaling limit is a Lévy process in this case. The case of bounded jumps yields a completely different behavior.
Additional file 6 of Identification and validation of methylated differentially expressed miRNAs and immune infiltrate profile in EBV-associated gastric cancer
Creators: name: Zhu, Mansheng
name: Liang, Qixiang
name: Chen, Tao
name: Kong, Qian
name: Ye, Gengtai
name: Yu, Shitong
name: Li, Xunjun
name: He, Qinglie
name: Liu, Hao
name: Hu, Yanfeng
name: Yu, Jiang
name: Li, Guoxin
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 6: Table S1. Primers for QPCR assays. Figure S18. The relative expression of miR-129-2-3p of different GC cell lines transfected with inhibitor/mimics. **P=0.0013, ****P<0.0001.
CAD-oriented HEMT models from noise and scattering measurements
Creators: name: Caddemi, A.
name: Martines, Giovanni
name: Sannino, Mario
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1992
Subjects: ING-INF/01 Elettronica

description: The simultaneous determination of  noise, gain and scattering parameters by means of a computer-driven noise figure test-set allows the rapid and accurate characterization of some samples of HEMTs of the same series. An equivalent circuit model representing the behavior of the typical device then is extracted by means of a decomposition approach. Comparison between the model performance and the measured parameters of all devices are reported for the FHR 02FH (by Fujitsu). The modeling procedure is oriented to CAD of (M)MIC low noise amplifiers.
Additional file 9 of Identification and validation of methylated differentially expressed miRNAs and immune infiltrate profile in EBV-associated gastric cancer
Creators: name: Zhu, Mansheng
name: Liang, Qixiang
name: Chen, Tao
name: Kong, Qian
name: Ye, Gengtai
name: Yu, Shitong
name: Li, Xunjun
name: He, Qinglie
name: Liu, Hao
name: Hu, Yanfeng
name: Yu, Jiang
name: Li, Guoxin
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 9: Figure S21. The endogenous expression of miR-129-2-3p in different GC cell lines.
Quantum dynamics in photonic crystals
Creators: name: Prior, Javier
name: de Vega, Inés
name: Chin, Alex W.
name: Huelga, Susana F.
name: Plenio, Martin B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Employing a recently developed method that is numerically accurate within a model space simulating the real-time dynamics of few-body systems interacting with macroscopic environmental quantum fields, we analyze the full dynamics of an atomic system coupled to a continuum light-field with a gapped spectral density. This is a situation encountered, for example, in the radiation field in a photonic crystal, whose analysis has been so far been confined to limiting cases due to the lack of suitable numerical techniques. We show that both atomic population and coherence dynamics can drastically deviate from the results predicted when using the rotating wave approximation, particularly in the strong coupling regime. Experimental conditions required to observe these corrections are also discussed.
description: 5 pages, 2 figures Updated with published version
title: Налоговая политика государства в современных условиях
Creators: name: Корнеев, Г. О.
name: Погосян, В. Р.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Налоговая политика государства в современных условиях является активным инструментом проводимой в государстве экономической политики. Хотя она и имеет относительно самостоятельные функции, должна опираться на научную микроэкономическую теорию. Без этого она становится недостаточно реалистичной и
обоснованной. От эффектов реализуемой налоговой политики в значительной степени зависит и то, какие коррективы следует вносить государству в свою экономическую политику, как строить налоговую систему.
Improving understanding of the RF circuit behaviour of contemporary semiconductor devices through fast-sampling I (V)Curve tracer measurement
Creators: name: Ladbrooke, P.H.
name: Bridge, J.P.
name: Goodship, N.J.
name: Battison, D.J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: Most contemporary semiconductor devices exhibit dynamic I (V )behaviour that is different from the static (or dc)behaviour -in some cases markedly different.Commercial fast-sampling dynamic curve tracer instrumentation shows how devices ranging from diode structures to pseudomorphic high electron mobility transistors (PHEMTs)and heterojunction bipolars (HBTs)will behave in practical RF circuits.Examples of dynamic behaviour include the inability to cut-off some HBTs, which may lead to the power-added efficiency being highest at low supply voltages;highly non- diode-like flow of gate current and negative drain current flow in E-mode GaAs FETs;broadband negative differential conductivity in some PHEMTs,which complicates the circuit designers job of achieving stable circuits;the reduction of dispersion in high-voltage SiC FETs,and,by analysis of drain current transients,separation of the percentage contributions to dispersion in FETs and HEMTs made by deep levels and self-heating as a function of bias and operating point.
Low frequency dispersion effects on the input characteristics of microwave FETs
Creators: name: Cojocaru, Vicentiu I.
name: Brazil, Thomas J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The paper presents the experimental results of a low frequency test carried on a packaged GaAs MESFET, emphasizing the presence of some significant dispersion effects in relation to the input C-V and I-V characteristics of the device. The test has been performed within the frequency range 10kHz÷40MHz on a commercial, packaged GaAs MESFET, connected in a special configuration and using an impedance meter system. The results presented show a significant variation of these two input characteristics with frequency.
Titanocene and zirconocene complexes for the carbon-oxygen bond cleavage of lignin model compounds
Creators: name: Fartel, Beata
Publisher: name: University of British Columbia
Year: 2014

description: The development of well-defined transition metal catalysts for the selective cleavage of carbon-oxygen bonds is a critical challenge for the conversion of lignin to useful chemicals. Oxophilic titanocene complexes are particularly attractive for this application. They have been thoroughly studied in a variety of oxidation states and their reactivity can be dramatically altered by simple modifications of the ancillary ligands. Additionally, titanium is earth-abundant, inexpensive, and relatively non-toxic. Titanocene-mediated carbon-oxygen bond cleavage of the α-aryloxy ketones 2-phenoxy-1-phenylethanone and 2-(2,6-dimethoxyphenoxy)-1-phenylethanone has been demonstrated. In contrast to previously reported C-O bond cleavage reactions of lignin model compounds, this transformation occurs readily at ambient temperature and pressure. A titanocene phenoxide enolate complex was obtained as a result of the C-O bond cleavage of 2-phenoxy-1-phenylethanone. Selective cleavage of the Ti-enolate bond was achieved with the use of mild acids. Alternatively, both products of the C-O bond cleavage, acetophenone and phenol, can be released from titanium through the use of strong acids, without displacing the cyclopentadienyl ligands. Titanocene aryloxide enolate complexes with ortho-substituted aryloxy ligands were synthesized. A weakening of the Ti-OAr bond was observed as a result of the increased steric bulk. This allowed for partial or complete protonolysis of both Ti-O bonds with the use of the mild acid lutidinium chloride. A titanocene alkoxide phenoxide complex was prepared. The elimination of phenol from this compound was expected to lead to the formation of a titanaoxirane intermediate, which would then undergo C-O bond cleavage to yield titanocene phenoxide enolate. This reaction is an essential step in the target catalytic cycle for the C-O bond cleavage of lignin model compounds. However, the desired transformation could not be achieved and related titanocene complexes with substituted aryloxy ligands could not be synthesized. The use of zirconocene was investigated to alleviate to some of the problems encountered with titanocene chemistry. In particular, the ability of zirconium to form 18-electron complexes resulted in different reactivity as compared to titanocene.
Centrosema pubescens Benth.
Creators: name: Araújo, Diogo
name: Alves, Marccus
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Centrosema
Centrosema pubescens

description: 52. Centrosema pubescens Benth.
United States, Mexico, Central America, Caribbean, Venezuela, Ecuador, Bolivia, Brazil (from Amazonas to Rio de Janeiro), Argentina.
Selected Voucher:—Macacos, Araújo et al. 432 (UFP); Piedade, Melo et al. 136 (UFP).
description: Published as part of Araújo, Diogo & Alves, Marccus, 2010, Climbing plants of a fragmented area of lowland Atlantic Forest, Igarassu, Pernambuco (northeastern Brazil), pp. 1-24 in Phytotaxa 8 on page 19, DOI: 10.11646/phytotaxa.8.1.1, http://zenodo.org/record/4893863
title: Civilizational hexagon as a pathway to conflict management
title: examining its application in Sub-Saharan Africa in the post-cold war era
titleType: Subtitle
Creators: name: Mena, Wogene Berhanu
Publisher: name: Universitätsverlag Potsdam
Year: 2021
Subjects: subject: 341 Völkerrecht

description: This paper examines the attempts of implement-ing components of the concept called Civiliza-tional Hexagon as a pathway to civilizing conflict in the Sub-Saharan Africa in the post-Cold War period. Despite significant decline in the violent conflict and substantial progress socio-economic aspects in the period, most states in the region have been facing challenges in their way to civilize conflict related to absence of inclusive political system, weak state unable to monopolize the use of violence in its territory, and social injustice. On the other hand, states like Botswana and Mauritius managed to civilize conflict through significant improvement in democratic consolidation. Besides their relative success in implementing six elements, these states enabled to integrate traditional institutions with modern state apparatus that helped them to fill the gap created as result of exogenous state formation process and the resulting unfinished nation-building project. Additionally, traditional institutions contributed to managing diversity.
description: Dieses Papier untersucht die Versuche, Komponenten des Konzepts „zivilisatorisches Hexagon“ als einen Weg zur Zivilisierung von Konlikten in Afrika südlich der Sahara nach 1990 umzusetzen. Trotz eines signifikanten Rückgangs der gewaltsamen Konflikte und erheblicher Fortschritte in sozio-ökonomischen Aspekten stehen die meisten Staaten in der Region vor Herausforderungen, die mit dem Fehlen eines inklusiven politischen Systems, einem schwachen Staat, der nicht in der Lage ist, das Gewaltmonopol in seinem Territorium auszuüben, und sozialer Ungerechtigkeit zusammenhängen. Gleichwohl sind Staaten wie Botswana und Mauritius in der Lage, Konflikte durch signifikante Verbesserung der demokratischen Konsolidierung zu zivilisieren. Neben ihrem relativen Erfolg bei der Umsetzung der sechs Elemente haben diese Staaten es geschafft, traditionelle Institutionen in den modernen Staatsapparat zu integrieren, was ihnen half, die Lücke zu füllen, die durch den exogenen Staatsbildungsprozess und das daraus resultierende unvollendete Projekt der Nationenbildung entstanden war. Zusätzlich halfen die traditionellen Institutionen dabei, Vielfalt zu sichern.
description: Staat, Recht und Politik – Forschungs- und Diskussionspapiere = State, Law, and Politics - Research and Discussion Papers; 11
Modeling of GaN-based heterostructure devices
Creators: name: Sacconi, Fabio
name: Di Carlo, A.
name: Della Sala, F.
name: Lugli, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: Self-consistent quantum models of GaN-based nanostructures are presented. We report on the calculation of electrical characteristics of AlGaN/GaN heterojunction field effect transistors through an optimized effective mass approach based on the self-consistent solution of the Schrödinger and Poisson equations coupled to a quasi-2D model for the current flow.
The position profiles of order cancellations in an emerging stock market
Creators: name: Gu, Gao-Feng
name: Xiong, Xiong
name: Ren, Fei
name: Zhou, Wei-Xing
name: Zhang, Wei
Publisher: name: arXiv
Year: 2011
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: Order submission and cancellation are two constituent actions of stock trading behaviors in order-driven markets. Order submission dynamics has been extensively studied for different markets, while order cancellation dynamics is less understood. There are two positions associated with a cancellation, that is, the price level in the limit-order book (LOB) and the position in the queue at each price level. We study the profiles of these two order cancellation positions through rebuilding the limit-order book using the order flow data of 23 liquid stocks traded on the Shenzhen Stock Exchange in the year 2003. We find that the profiles of relative price levels where cancellations occur obey a log-normal distribution. After normalizing the relative price level by removing the factor of order numbers stored at the price level, we find that the profiles exhibit a power-law scaling behavior on the right tails for both buy and sell orders. When focusing on the order cancellation positions in the queue at each price level, we find that the profiles increase rapidly in the front of the queue, and then fluctuate around a constant value till the end of the queue. These profiles are similar for different stocks. In addition, the profiles of cancellation positions can be fitted by an exponent function for both buy and sell orders. These two kinds of cancellation profiles seem universal for different stocks investigated and exhibit minor asymmetry between buy and sell orders. Our empirical findings shed new light on the order cancellation dynamics and pose constraints on the construction of order-driven stock market models.
description: 17 pages, 6 figures and 6 tables
BО'LАJАK О'QІTUVСHІLАRNІNG BІLІSH FАОLІYАTІNІ RІVОJLАNTІRІSHDА  TА'LІM FAOLIYATINING АHАMІYАTІ.
Creators: name: Tolipova, O. I.
name: Juluboyev, Alimardon
name: Mirzaliyeva, Zarina
name: Nematova, Azizxon
name: Rasulova, Munavarrxon
name: Qo'ldashev, Abduqodir
Publisher: name: Zenodo
Year: 2023

description: Maqolada hоzіrgі kundа Rеspublіkаmіzdа аmаlgа оshіrіlаyоtgаn іslоhоtlаrnіng tаqdіrі yоshlаrnіng mа'nаvіy qіyоfаsіgа, shаxsіy bаrkаmоllіgіgа bоg'lіqligi, va vаzіfаlаrnі аmаlgа оshіrіsh іnsоnіy о'zаrо munоsаbаtlаrdа dеmоkrаtіk tаmоyіllаrnі оnggа tо'lа sіngdіrіshnі tаqоzо еtishligi, insоnlаr о'rtаsіdаgі іjtіmоіy munоsаbаtlаr Shаrqdа о'zіgа xоs vа hаr bіr mіllаt psіxоlоgіyаsіgа mоs hоldа rіvоjlаnishi keltirilgan.
Stability of the selfsimilar dynamics of a vortex filament
Creators: name: Banica, Valeria
name: Vega, Luis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we continue our investigation about selfsimilar solutions of the vortex filament equation, also known as the binormal flow (BF) or the localized induction equation (LIE). Our main result is the stability of the selfsimilar dynamics of small pertubations of a given selfsimilar solution. The proof relies on finding precise asymptotics in space and time for the tangent and the normal vectors of the perturbations. A main ingredient in the proof is the control of the evolution of weighted norms for a cubic 1-D Schrödinger equation, connected to the binormal flow by Hasimoto's transform.
description: revised version, 36 pages
Additional file 2 of Effects of intraoperative individualized PEEP on postoperative atelectasis in obese patients: study protocol for a prospective randomized controlled trial
Creators: name: Zhu, Chen
name: Yao, Jing-Wen
name: An, Li-Xin
name: Bai, Ya-Fan
name: Li, Wen-Jing
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 2: Fig 1. Independent predictors of risk for development of postoperative pulmonary complications as described by Canet et al. [1] (ARISCAT score). A risk score ≥ 26 predicts an intermediate to high risk for postoperative pulmonary complications). a The simplified risk score is the sum of each logistic regression coefficient multiplied by 10, after rounding off its value. Table 1. Difficult Mask Ventilation Combined with Difficult Laryngoscopy Prediction Score [2].
Design optimisation of ultra-short gate HEMTS using MONTE CARLO simulation
Creators: name: Mateos, Javier
name: González, Tomas
name: Pardo, Daniel
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: By using a Monte Carlo simulator the static and dynamic characteristics of a 50 nm gate AlInAs/GaInAs δ−doped HEMTs are investigated. The Monte Carlo model includes some important effects that are indis-pensable when trying to reproduce the real behaviour of the devices, such as degeneracy, presence of surface charges, T-shape of the gate, presence of dielectrics and contact resistances. Among the large quantity of design parameters that enter into the fabrication of the devices, we have studied the influence on their per-formance of two factors: the doping level of the δ -doped layer and the length of the recess. We will show that the first one has a very important effect on the cutoff frequency and other important figures of merit of the transistor, and its value has to be carefully chosen. Conversely, we have also checked that the influence of the recess length is quite slight.
Ärzte und Naturwissenschaftler auf Reisen - Reiseberichte aus der Deutschen Medizinischen und der Münchener Medizinischen Wochenschrift 1890 - 1930
Creators: name: Neid, Theresa
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2013
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 610
subject: 830

description: Reiseliteratur lässt sich in nahezu allen Epochen der Menschheitsgeschichte nachweisen. Aufgrund der verschiedenen gattungsspezifischen Formen und Inhalte ist es bis heute nicht abschließend gelungen, sie als einheitliche Gattung zu beschreiben. Die medizinische Reiseliteratur beinhaltet Reiseberichte, in denen medizinische Belange im Vordergrund stehen. Im Mittelpunkt dieser Dissertation steht die Frage, ob es einen Wandel in der medizinischen Reiseliteratur zwischen 1890 und 1930 gab. Die eingehende Analyse des Quellenmaterials zeigt, dass die medizinische Reiseliteratur nicht nur der Vermittlung von Informationen diente, sondern dass man sie beispielsweise auch für Werbezwecke und als Möglichkeit der direkten oder indirekten Kritik nutzte. Außerdem ließ sich anhand mehrerer konkreter Beispiele der große Einfluss der medizinischen Reiseliteratur auf das Leben der Reisenden selbst sowie auf die gesamte deutsche Medizin feststellen.
description: Travel literature is detected in almost every age of the human history. Because of the different genre specific forms and contents it isn’t closing succeded to describe it as a consistent genre to this day. The medical travel literature includes travel reports, in which medical interests stand in the foreground. This dissertation is focusing on the question, whether a change of the medical travel literature between 1890 and 1930 happened. The deeply analysis of the source material shows that the medical travel literature was not only used for information brokerage but also by way of example for commercial purposes and the possibility for direct and indirect criticism. Furthermore a great influence of the medical travel literature on the life of the passengers themself and also on the whole German medicine was noticed by means of several practical examples.
Microwave equipment for navigation Overlay (NOS) service
Creators: name: Comparini, M.C.
name: Giubilei, R.
name: Tranquilli, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The aim of the Navigation Overlay Service (NOS) payload (NOS P/L) is to provide an overlay function with supplementary services to the current operating GPS. This kind of services uses existing GEO telecommunications satellite to transmit overlay signals to provide improvement of accuracy, system’s integrity information, wide area differential corrections. This service will be provided, in Europe, by EGNOS (European Geostationary Navigation Overlay Service). A similar service, called WAAS (Wide Area Augmentation Service) will operate in U.S.A. Similar services are also provided in Japan with MT-SAT. The paper will present the architecture of the payload manufactured by Alenia Spazio and embarked on the ESA Artemis satellite.
Calystegine in Solanum tuberosum L. - Klonierung, Expression und Charakterisierung der Tropinonreduktasen I und II, putativer Enzyme des Tropanalkaloidstoffwechsels
Creators: name: Keiner, Ronald
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2001
Subjects: Hochschulschrift
Elektronische Publikation
Zsfassung in engl. Sprache

description: Calystegine sind Nortropanalkaloide, die in verschiedenen Arten der Solanaceen detektiert wurden, die klassische Tropanalkaloide wie Hyoscyamin und Scopolamin akkumulieren. Sie akkumuliern auch in Solanum tuberosum (L). Kartoffelpflanzen enthalten Calystegine in Blättern, Sproßachsen, Blüten, Früchten und Wurzeln. Calystegin A3 und B2 sind die Hauptbestandteile. Die höchsten Konzentrationen wurden in den Keimen bestimmt, die sich aus den Keimaugen entwickeln. In 3 mm langen Keimen akkumulieren 3,3 mg Gesamtcalystegin pro g/Frischmasse. Es wird angenommen, daß die Calystegine sich vom Tropanalkaloidstoffwechsel ableiten. Es wurden verschiedene cDNA's aus S. tuberosum isoliert, die eine hohe Homologie zur pseudotropinbildenden Tropinonreduktase (TRII) und zur tropinbildenden Tropinonreduktase (TRI) besitzen. Die equivalenten Aminosäuresequenzen zeigen typische Motive der kurzkettigen Dehydrogenasen/Reduktasen, der sogenannten SDR-Enzymfamilie. Die rekombinanten TRI- und TRII-Proteine wurden in E. coli herterolog exprimiert und katalysierten die Reduktion des Tropinons zum Tropin (TRI) und Pseudotropin (TRII). Das TRII-Protein hat einen ähnlichen Km-Wert, pH-Optimum und Substrat- und Cosubstratpreferenzen wie die aus der Literatur bekannten TRII-Proteine. Das TRII-Gen ist in Wurzeln, Knollen und oberirdischen Geweben exprimiert. Die TRI-mRNA Expression wurde ebenfalls analysiert.
description: Calystegines are nortropane alkaloids that are found in Solanaceae containing the classical tropane alkaloids hyoscyamine and scopolamine, and in other Solanaceae such as Solanum tuberosum (L). Potato plants contain calystegines in leaves, stems, flowers, fruits and roots. Calystegines A3 and B2 are the main constituents. Highest concentrations were measured in sprouts emerging from the tubers. In 3 mm long sprouts 3.3 mg total calystegines per gram fresh mass were detected. Calystegines are assumed to derive from the classical tropane alkaloid pathway. We isolated several cDNA's from S. tuberosum with high homology to the pseudotropine forming tropinone reductase (TRII) and tropine forming tropinone reductase (TRI). The equivalent amino acid sequences show typical motifs of a short chain dehydrogenase (SDR). The recombinant TRI and TRII proteins expressed in E. coli catalyzes tropine (TRI) or pseudotropine (TRII) formation from tropinone. The TRII protein has a Km-value, a pH-optimum, substrate and co-substrate preferences similar to those reported for the TRII enzymes from other Solanaceae species. The TRII gene is expressed in roots, tubers and aerial parts of potato. TRI mRNA expression was also analyzed.
A L-BAND 50-WATT GaAs Power FET with 58% power added efficiency
Creators: name: Hayashi, Hisanori
name: Ui, Norihiko
name: Saito, Toshiaki
name: Fukaya, Jun
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: High efficiency 50W GaAs power device h s been developed using two high bre kdown voltage G As FET chips that have an AlGaAs/GaAs heterostructure.Circuit designing considerations include the termination of the second-harmonics for improved power added efficiency.The resultant output power at the 3dB g in compression point is 47.0dBm with 58%power added efficiency (PAE)and 15.0 dB linear gain at 1.6GHz. To the uthors ’knowledge,this is the highest efficiency for 50-w tt G As device in the industry.
Quantization of linearized gravity in cosmological vacuum spacetimes
Creators: name: Fewster, Christopher J.
name: Hunt, David S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Linearized Einstein gravity (with possibly nonzero cosmological constant) is quantized in the framework of algebraic quantum field theory by analogy with Dimock's treatment of electromagnetism [Rev. Math. Phys. 4 (1992) 223--233]. To achieve this, the classical theory is developed in a full, rigorous and systematic fashion, with particular attention given to the circumstances under which the symplectic product is weakly non-degenerate and to the related question of whether the space of solutions is separated by the classical observables on which the quantum theory is modelled.
description: 41pp, v2&3 typos and errors corrected; references added. v4 Final version to appear in Reviews in Mathematical Physics
Breakdown and high-field reliability issues in heterojunction FETs for microwave power amplification
Creators: name: Menozzi, R.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: High-field reliability issues connected with hot electron and impact ionization are typically the reliability bottleneck of power FETs for microwave and millimeter-wave applications. This work deals with some aspects of this problem, from characterization and accelerated stressing techniques to the physical degradation mechanisms, using power AlGaAs/GaAs HFETs as a test vehicle.
Winkelabhängige K-Röntgenabsorption und Elektronenstruktur von 3d-Metallverbindungen
Creators: name: Botcharov, Serguei
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2001
Subjects: Elektronische Publikation
Zsfassung in engl. Sprache

description: Das Verfahren der winkelabhängigen K-XANES (X-ray Absorption Near-Edge Structure) kann die Winkelsymmetrie der unbesetzten Elektronenzustände unterscheiden und ermöglicht somit eine Untersuchung der lokalen räumlichen Verteilung ihrer Ladungsdichte in verschiedenen Atomkomplexen. Die K-XANES-Spektralkurven bilden die lokalen unbesetzten Zustandsdichten ab. Durch eine quantitative Analyse von mehreren winkelabhängigen K-XANES-Spektren von Einkristallen können sie in partielle Komponenten bestimmter Winkelsymmetrie aufgelöst werden. Die innerhalb dieser Arbeit erstmalig durchgeführten winkelabhängigen K-XANES- Untersuchungen an der Reihe der Monoxiden MnO, FeO, CoO, NiO und CuO bestätigen die Anwendbarkeit von LSDA+U (Local Spin Density Approximation korrigiert durch Berücksichtigung der Hubbardschen Energie U) zur Beschreibung der stark korrelierten 3d-Isolatoren ausdrücklich. Eine Analyse verschiedener Verbindungen der 3d-Übergangsmetalle (TiS2, TiSe2, TiTe2, V2O5, MnO, FeO, CoO, NiO, CuO und CuGeO3) zeigt eine Dominanz der p-artigen Beiträge zum Vormaximum der K-Absorptionskante bei niedrigen Ordnungszahlen des 3d-Metalls. Bei den 3d-Übergangsmetallen höherer Ordnungszahl dominieren jedoch die d-artigen Beiträge. Die Untersuchungen zeigen, daß die unbesetzten d-artigen Zustände in Mott/Charge-Transfer-Isolatoren an den kürzesten Me-O-Bindungen lokalisiert sind.
description: The technique of angular resolved K XANES (X-ray Absorption Near-Edge Structure) can differentiate between the angular symmetry of empty electronic states and allows thus a study of local spatial charge distribution in different atomic complexes. The K XANES curves image the unoccupied local densities of states. They can be resolved via a quantitative analysis of numerous angular resolved K XANES spectra of single-crystals into the partial components of particular angular symmetries. Original studies of angular resolved K XANES performed within this work at the range of monoxides MnO, FeO, CoO, NiO and CuO sustain the applicability of LSDA+U (Local Spin Density Approximation corrected by the Hubbard energy U) for description of strongly correlated 3d insulators. An analysis of different 3d transition metal compounds (TiS2, TiSe2, TiTe2, V2O5, MnO, FeO, CoO, NiO, CuO und CuGeO3) indicates a dominance of p-like contributions to the K absorption pre-edge maximum in the case of earlier 3d metals. The d-like contributions dominate however by the later 3d transition metals. The studies derive the unoccupied d-like states in Mott/charge-transfer insulators to be localised at the shortest Me-O-bonds.
Infrarotspektroskopische, strukturelle und kinetische Untersuchung der Pyruvatoxidase aus Lactobacillus plantarum
Creators: name: Wille, Georg
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2005
Subjects: subject: Elektronische Publikation
subject: Zsfassung in engl. Sprache
subject: 572.7912937

description: Pyruvatoxidase (POX) aus L. plantarum enthält den Kofaktor Flavin-Adenin-Dinukleotid (FAD). Der normalerweise planare Isoalloxazinring des FAD liegt in POX in einer geknickten Konformation vor. Der Einfluss des Knicks auf die Eigenschaften des FAD wurde mit redoxinduzierter Fourier-Transform-Infrarot-Differenzspektroskopie am freien Kofaktor und anhand verschiedener Flavoproteine und POX-Varianten untersucht. Einige Banden im redoxinduzierten IRDifferenzspektrum des FAD konnten, ausgehend von einer dichtefunktionaltheoretischen Normalmodenanalyse verschiedener Lumiflavinspezies, entsprechenden Schwingungsmoden zugeordnet werden. Frequenzunterschiede einiger Moden zwischen enzymgebundenem und freiem FAD werden diskutiert. Die enzymkinetischen und IR-spektroskopischen Eigenschaften der POX-Variante V265A werden auf der Grundlage der in der Arbeit bestimmten Kristallstruktur betrachtet. POX enthält weiterhin den Kofaktor Thiamindiphosphat (ThDP). Die katalytische Funktion verschiedener Aminosäurereste in der Nähe des ThDP wurde bestimmt, indem die steady-state-Konzentrationen der ThDP-Reaktionsintermediate für verschiedene POX-Varianten ermittelt wurden. Weiterhin wurden die Spezifität der POX hinsichtlich des Substrates Phosphat sowie die Kopplung des Elektronentransfers mit der Übertragung des Acetylrestes vom Acetyl-ThDP auf Phosphat oder andere Nukleophile untersucht.
description: Pyruvate oxidase (POX) from L. plantarum contains the cofactor flavin-adeninedinucleotide (FAD). The isoalloxazine ring of FAD is normally planar, yet is found in a bent conformation in POX. The effect of this bend on the properties of FAD was investigated by redox-induced Fourier-Transform-Infrared difference spectroscopy, using the free cofactor and several flavoproteins and POX variants. Some bands of the redox-induced IR difference spectra could be assigned to vibrational modes, based on a normal mode analysis of several lumiflavin species, using a density functional theoretical approach. Frequency differences of some modes between free and enzymebound FAD are discussed. Enzyme kinetical and IR-spectroscopic properties of the POX variant V265A are explained on the basis of the crystal structure which has been determined in the present work. The second cofactor of POX is thiamin diphosphate (ThDP). The catalytic function of several amino acid residues in the vicinity of ThDP was determined by measuring steady state concentrations of ThDP reaction intermediates for a number of POX variants. Furthermore, the specificity of POX regarding the substrate phosphate and the coupling of the electron transfer step with the transfer of the acetyl moiety from acetyl-ThDP to phosphate or other nucleophiles were investigated.
KA-BAND equipment assembly for multimedia satellite payloads
Creators: name: Ulian, Patrice
name: Leveque, Hervé
name: Recly, Agnes
name: Cayrou, Jean-Christophe
name: Cogo, B.
name: Cazaux, Jean-Louis
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: This paper describes new equipment generation developed in Alcatel Space Industries to meet recent multimedia needs for Ka-Band satellite payloads. These units are built as assemblies, and use building blocks packaged with new MCM technology.
Additional file 1 of Prevalence, serotypes, and antimicrobial resistance of Salmonella isolates from patients with diarrhea in Shenzhen, China
Creators: name: Shen, Hongwei
name: Chen, Haochuan
name: Ou, Yongxuan
name: Huang, Tingting
name: Chen, Siping
name: Zhou, Lintao
name: Zhang, Jinjin
name: Hu, Qinghua
name: Zhou, Yiwen
name: Ma, Wen
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 1: Table S1. List of primers used in this study.
Constraints on the charged scalar effects using the forward-backward asymmetry on $B\to D^{(*)}τ\bar{ν_τ}$
Creators: name: Sakaki, Yasuhito
name: Tanaka, Hidekazu
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The decay modes $\bar{B}\to D^{(*)}τ\barν_τ$ are sensitive to charged scalar effects, such as the charged Higgs effects. In this paper we suggest a method to determine their effects by using the ratio of branching fractions and forward-backward asymmetries. In particular, forward-backward asymmetries on $\bar{B}\to D^{(*)}τ(\to πν_τ)\barν_τ$, $\bar{B}\to D^{(*)}τ(\to ρν_τ)\barν_τ$, and $\bar{B}\to D^{(*)}τ(\to a_1ν_τ)\barν_τ$ play an important role, which discriminate the Standard Model from other New Physics scenarios.
description: 8 pages, 7 figures. The Results of forward-backward asymmetry on B->D(*)pi nu nu, B->D(*)rho nu nu, and B->D(*)a1 nu nu added
The Reliability of III-V semiconductor Heterojunction Bipolar Transistors
Creators: name: Borgarino, M.
name: Plana, R.
name: Graffeuil, J.
name: Cattani, L.
name: Fantini, F.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: The Heterojunction Bipolar Transistor (HBT) features some characteristics that make it a very promising device in the telecom field. For these applications, the reliability is a key issue. The aim of the present paper is to summarise the most relevant reliability concerns, from whose the HBT suffers, as the stability of the ohmic contact, the presence of defects, and the stability of the base dopant. Since in the last years the Si/SiGe HBT has emerged as a strong competitor against the III-V HBT, a paragraph has been devoted to summarise the reliability concerns of the Si/SiGe HBT.
Quantenkorrekturen im Hypermultiplettsektor von Typ II Stringtheorien
Creators: name: Günther, Holger
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2000
Subjects: Elektronische Publikation
Zsfassung in engl. Sprache

description: Typ II Stringtheorien, kompaktifiziert auf Calabi-Yau 3-Mannigfaltigkeiten, werden im Niederenergielimes durch N = 2 Supergravitationstheorien in vier Dimensionen beschrieben. Gegenstand der vorliegenden Arbeit ist die Untersuchung der störungstheoretischen Quantenkorrekturen zu den Hypermultiplettsektoren dieser Theorien. Im einfachsten Fall, der Kompaktifizierung der Typ IIA Stringtheorie auf einer Calabi-Yau Mannigfaltigkeit mit eindeutiger komplexer Struktur, enthält die Theorie nur ein Hypermultiplett, das sogenannte universelle. In Fortführung einer Arbeit von Strominger werden die störungstheoretischen Quantenkorrekturen in diesem Fall vollständig bestimmt. Weiter wird gezeigt, welche Probleme sich ergeben, wenn man versucht, die entsprechende Untersuchung im Fall einer beliebigen Zahl von Hypermultipletts durchzuführen. Durch Mirrorsymmetrie ist die Kompaktifizierung der Typ IIA Stringtheorie auf einer Calabi-Yau Mannigfaltigkeit äquivalent zur Kompaktifizierung der Typ IIB Stringtheorie auf der sogenannten Mirror-Mannigfaltigkeit. Es wird gezeigt, wie man die klassischen Hypermultiplettsektoren der beiden Theorien aufeinander abbildet und damit eine explizite Realisierung der Mirrorsymmetrie gegeben. In einem Anhang werden schließlich die benutzten geometrischen Konzepte erläutert, wobei insbesondere eine Einführung in die Theorie quaternionischer Mannigfaltigkeiten gegeben wird.
description: The low energy limit of type II string theories compactified on Calabi-Yau threefolds is given by N = 2 supergravity theories in four dimensions. The subject of this work is the investigation of the perturbative quantum corrections to the hypermultiplet sectors of these theories. The simplest case is given by the compactification of the type IIA string theory on a Calabi-Yau manifold with a unique complex structure. In this theory there is only one hypermultiplet, called the universal one. In continuation of work by Strominger the complete perturbative quantum corrections in this case are determined. Furthermore, there is a discussion of the problems arising if one tries to carry out the analogous investigation in the case of an arbitrary number of hypermultiplets. By mirror symmetry the compactification of the type IIA string theory on a Calabi-Yau manifold is equivalent to the compactification of the type IIB string theory on the so-called mirror manifold. It is demonstrated how to map the classical hypermultiplet sectors of the two theories onto one another. Thus an explicit realization of mirror symmetry is given. An appendix contains an introduction to the geometrical concepts used in the text with special emphasis on the theory of quaternionic manifolds.
Pulsed Electrical Stress Techniques for the Detection of Non-thermal Lifetime-Problems with Semiconductor Devices and their IC’s
Creators: name: Mottet, B.
name: Sydio, C.
name: Hartnagel, H.L.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2000
Subjects: ING-INF/01 Elettronica

description: A method is presented for the investigation of non-thermal generated defect mechanisms with semiconductor devices. This method bases on applying Transmission Line Pulses (TLP) to the device to generate lifetime limiting defects. The pulse length is chosen down to 20 ns. This is short compared to the thermal time constant of the respective devices providing the generation of non-thermal defect mechanisms. Significantly higher current densities are used incomparison with normal operation to shorten the time of electrical defect generation. Current and voltage of theimpulse response, subsequent DC I/V and noise measurements are used to characterize the occurring defectmechanisms. Pulsed electrical stress techniques are proposed for different III/V semiconductor devices (e.g. TLM-structures,HBT) and results obtained with this method are presented.