527,451 research outputs found
Netzwerkbeziehungen im Biotech-Bereich : eine Analyse im Grossraum Zürich
No full textSpricht man von Wachstum und Innovation, so ruht ein grosser Teil der Hoffnungen auf einigen zukunftsträchtigen Schlüsselindustrien. Eine dieser Schlüsselindustrien sind die sogenannten Life Sciences, wozu auch die Biotech-Industrie gehört. Da Innovationsprozesse aufgrund der zunehmenden Komplexität und Geschwindigkeit sowie aufgrund zunehmender ökonomischer Arbeitsteilung und vertikaler Desintegration immer weniger im Alleingang bewältigt werden können, sind die Unternehmen gezwungen, mit ihrer unternehmensexternen Umwelt zu kooperieren. Netzwerke wirken sich deshalb in der Regel positiv auf die Innovationskraft aus. Um Netzwerkprozesse gezielt fördern zu können bzw. zu stimulieren, sind aber genaue Kenntnisse über dabei ablaufende Prozesse nötig. Der vorliegende Beitrag befasst sich mit Kooperationen, ihren Gründen, Hindernissen und ihrer Bedeutung für die im Biotech-Bereich tätigen Betriebe im Grossraum Zürich. Die Untersuchung zeigt zum einen, dass die untersuchten Biotech- Betriebe gut in verschiedene Netzwerke eingebunden sind, dabei aber teilweise Probleme auftreten, zum anderen, dass die Kooperationen oftmals internationalen Charakter aufweisen
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
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
Finite element analysis of wrinkling membranes
No full textA new iterative scheme is proposed for finite element analysis of wrinkling or tension structures. The scheme is based upon the observation that there exists an invariant relationship, due to the uniaxial tensile stress state of wrinkling, between some of the strain components referred to the local frame aligned with wrinkling in a region where wrinkling occurs. This enables us to update the stress state and the internal forces correctly taking into account the existence of wrinkling. The finite element implementation of the scheme is straightforward and simple, and only minor modifications of the existing total Lagrangian finite element codes for membranes are needed The validity of the scheme is demonstrated via numerical examples for the torsion of a membrane and the quasi-static inflation of an automotive airbag, both made of isotropic or anisotropic elastic membranes. The examples suggest that the present iterative scheme has a good convergence characteristic even for a large loading step
On the lifts of F(2K S; S)structure satisfying F2KS FS 0; (F 6 0; K 1 1; S 1 1) on cotangent and tangent bundle
No full textThis paper consists of two main sections. In the first part, we find the integrability conditions bycalculating Nijenhuis tensors of the horizontal lifts of F(2K S; S)structure Satisfying F2KS FS 0. Later, we get the results of Tachibana operators applied to vector and covector fieldsaccording to the horizontal lifts of F(2K S; S)structure in cotangent bundle T(Mn). Finally,we have studied the purity conditions of Sasakian metric with respect to the horizontal lifts of thestructure. In the second part, all results obtained in the first section were obtained according to thecomplete and horizontal lifts of F(2K S; S)structure in tangent bundle T(Mn)
All digital 1.62 Mb/s QPSK burst-mode system for FTT/VDSL transmission
No full textThis paper presents an all digital 1.62 Mb/s quadrature phase-shift keying (QPSK;) burst-mode transceiver for fiber-to-the-curb/very-high-rate digital subscriber line (FTTC/VDSL) application. In a point-to-multipoint FTTC/VDSL network architecture, a time division multiple access (TDMA) scheme is used to connect multiple user devices to the network device. We discuss the design and implementation of an all-digital burst-mode QPSK system for transmission of 1.62 Mb/s upstream data over FTTC/VDSL channel environment. All operations of the QPSK system, including power detection, demodulation, box-car filtering, fast/slow-mode carrier and timing recovery, have been realized digitally without multiplication. It is shown by theoretical and computer simulation results that the proposed QPSK transceiver operates on up to 2.5 kft (about 762 m) of 26 gauge cable with a comfortable noise margin.X111sciescopu
Performance of a 51.84-Mb/s VDSL transceiver over the loop with bridged taps
No full textThis paper presents a study of the effects of bridged taps on very high-speed digital subscriber line (VDSL) transmission systems. It is shown that the short bridged taps; which affect VDSL signals, are much more damaging than the longer bridged taps, which affect other xDSL signals, such as high-rate digital subscriber line (HDSL) and asymmetric digital subscriber line (ADSL). Specifically, short bridged taps introduce a lot of linear distortion in the loop's transfer function. In addition, they also tend to introduce more overall propagation loss than longer bridged taps. The peak-power-to-average-power ratio (PAR) of the signal increases for the loop with short bridged taps, and thus more AID bits are needed in the implementation of a digital VDSL transceiver as compared to the loop with long bridged taps. The performance of various equalizer structures is discussed in the presence of a severe channel distortion caused by the bridged tap.X114sciescopu
Dynamic spectrum allocation based on binary integer programming under interference graph
No full textThis paper considers a dynamic spectrum allocation (DSA) for efficient distribution of the spectrum resource by allocating the spectrum to be responsive to demand variations. In this DSA model, a spectrum broker (SB) is responsible for the allocation of the spectrum with the regional license inside the region of responsibility and the coordination of the wireless interference inside the region for quality of service (QoS) provisioning over the allocated spectrum. In this paper, we address the interference constrained DSA problem and propose an optimal DSA scheme by applying the binary integer programming (BIP) approach to the DSA. Within the interference graph based interference constraint, the proposed scheme obtains a optimal set of binary decisions on whether to allocate or not allocate the channels to the access points within the region in accordance with the objective (i.e., maximization of the revenue of the SB, maximization of the spectrum utilization inside the region, and multi-objective optimization compromising the revenue and spectrum utilization maximization). Simulation results demonstrate that the proposed scheme efficiently distributes the spectrum resource in accordance with the corresponding objective and the multi-objective optimization obtains the compromise solution depending on the preference between the revenue and spectrum utilization
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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