177,240 research outputs found
Ad Scholas Mathematicas, Domi Forisqve Aperiendas, Literatos Academiae Cives, Eosdemq. Vtilissimarvm Doctrinarvm Stvdiosos, D. VII Ian. In Avditorio Minori, Disserendi Pvblice Initivm Factvrvs, Perofficiose Invitat Ernestvs Christianvs Schroedtervs, Mathem. Prof. Pvbl. Extraord. Et Colleg. Philos. Assessor
No full textAutopsie nach Exemplar der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: VVittenbergae A. R. S. MDCCIX. Prelo Christiani Schroedteri, Acad. Typ
De Templi Posterioris Prae Priori Gloria / Rectore Magnificentissimo Serenissimo Principe Regio Et Electoratvs Saxonici Herede, Dn. Friderico Avgvsto, Et Indvltv Celeberrimi Philosophorvm Ordninis, In Academia Ad Albim, Eivsdemqve Avditorio Philosophico. Ad D. XXX. Oct. A. G. R. MDCCXV, ... publice disserent Praeses Et Avctor, M. Hieronymvs Wigand Biel, Lvneburgensis, Ac Respondens Thomas Pfützner/ Estho-Livonvs
No full textWittenberg, Univ., Phil.. Diss., 1715Fingerprint nach Ex. der HAB Wolfenbüttel und der ULB Sachsen-AnhaltSignaturformel nach Ex. der HAB Wolfenbüttel und der ULB Sachsen-Anhalt: [1], A - D4Vorlageform des Erscheinungsvermerks: Vitembergæ Prelo Schroederiano, Acad. Typ. - Erscheinungsjahr nach der Datierung im Titel bestimmtTeilw. in hebr. Schr
Generosissimis Atqve Nobilissimis Jurium Cultoribus S. P. D. / Mich. Henricus Gribner. D. & P. P. : [Scrib. Wittemb. Sax. prid. Non. Qvinctil. A. O. R. MDCCVIII.]
No full textEinladung zur Verteidigung der jur. Diss. von Christoph Heinrich Berger, Christian Ludwig Thilo, Sigismund Ehrenfried von Oppel, Johann Jacob Feuerlein u. Friedrich Adolph von Berge, 6. Juli 1708Vorlageform des Kolophon: Vitembergae. Prelo Christiani Schroedteri Acad. Typ. - Erscheinungsjahr nach Datierung am Textende bestimm
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
SPICE Compact Model for an Analog Switching Niobium Oxide Memristor
No full textIn this paper, we present a compact SPICE model
of an analog switching memristive device based on niobium oxide
and investigate the functionality of the same as a synapse element
through its compact model by utilizing it in a simulation of
an 8x8 resistive crossbar array. Considering especially the von
Neumann bottleneck for neural network computing tasks, memristive
crossbar arrays offer a potential in-memory computing
solution performing highly parallel matrix-vector multiplication
and reducing the energy consumption. In particular, multilevel
switching memristive devices with intrinsic self-compliance
are predestined for crossbar operations. Based on experimental
results of a bi-layer Ti/Al2O3/Nb2O5/Ti stack, a compact physical
model was recently derived, assuming an underlying Poole-
Frenkel emission mechanism. High model accuracy in terms of
I-V behaviors, dynamic route map and power exponent plots
were demonstrated by fitting the nonlinear I-V relation and the
state function to measurement data, verifying analog gradual
switching for the voltage driven extended memristor. In this
paper the SPICE implementation for the core memductance
accompanied by a parallel and series resistor is introduced and
its application for sense analysis via analog and multi-memristor
circuit exploitation is presented. Adopting the SPICE model, the
switching dynamics is investigated and discussed for performing
synaptic potentiation and depression behavior in a potential
crossbar application
Physics-based modeling of a bi-layer Al2O3/Nb2O5 analog memristive device
No full textThis paper proposes the derivation of a physicsbased
model of an analog memristive device realized as a bi-layer
Al2O3/Nb2O5 stack. Memristive crossbar arrays implementing
matrix-vector multiplications are a central building block of novel
computing-in-memory architectures for artificial neural network
and neuromorphic computing applications. The presented memristor
shows analog, multi-level switching at high resistances
without electroforming and is suitable for crossbar operations
with low energy consumption. By including a graphical analysis
method of the I-V curves obtained in a quasi-static approach, the
dynamic behavior is analyzed with regard to ohmic and Poole-
Frenkel behavior. Finally, a compact model, represented by an
algebraic differential equation, is proposed and verified by fitting
calculated solutions to experimental data
A pseudo-memcapacitive neurotransistor for spiking neural networks
No full textIn this paper, we present a pseudo-memcapacitive
neurotransistor by embedding a nonvolatile, abrupt-switching
memristor at the gate of an NMOS transistor to emulate neuronal
integrate and fire behavior. Neural networks, implementing spikebased
computing paradigms on hardware platforms, integrating
memristor crossbar arrays on underlying CMOS circuitry, operate
similarly as neuronal networks in the human brain, which can
significantly improve the time and energy efficiency of standard
data processors.We demonstrate that also nonvolatile memristors
can be considered to realize neuronal leaky integration and
firing functionality including the neuron reset being performed
intrinsically by a sufficiently discharged ’membrane’ potential at
the gate of a transistor. A versatile, compact and abrupt-switching
model of a nonvolatile memristor with built-in cycle-to-cycle
variability is proposed, forming a pseudo-memcapacitance along
with the gate capacitance and evoking conditional neuronal spike
generation depending upon the properties of the input pulse train.
The SPICE code of the pseudo-memcapacitive neurotransistor
is applied to verify the design parameters that trigger firing.
Finally, the envisaged circuit realization of the proposed design
is discussed
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