Roger Marks - Academia.edu (original) (raw)

Papers by Roger Marks

IEEE Access

The trend toward cloudification of communication networks and services, with user data and applic... more The trend toward cloudification of communication networks and services, with user data and applications stored and processed in data centers, pushes the limits of current Data Center Networks (DCNs), requiring improved scalability, resiliency, and performance. Here we consider a DCN forwarding approach based on software-defined addressing (SDA), which embeds semantics in the Medium Access Control (MAC) address and thereby enables new forwarding processes. This work presents Flow-Zone Switching (FZS), a loop-free location-based source-routing solution that eliminates the need for forwarding tables by embedding routing instructions and flow identifiers directly in the flow-zone software-defined address. FZS speeds the forwarding process, increasing the throughput and reducing the latency of QoS-sensitive flows while reducing the capital and operational costs of switching. This paper presents details of FZS and a performance evaluation within a complete DCN. INDEX TERMS Flow-zone switching (FZS), data center network (DCN), software-defined addressing (SDA), layer 2, MAC address, routing, forwarding, QoS, clos, stateless.

1982 International Electron Devices Meeting

Digest on Antennas and Propagation Society International Symposium

7th IEEE Conference on Instrumentation and Measurement Technology

In 1989 a long-range program was instituted at the National Institute of Standards and Technology... more In 1989 a long-range program was instituted at the National Institute of Standards and Technology (NIST) specifically directed at developing improved metrology methods and standards to support microwave monolithic integrated circuit (MMIC) technology. The authors describe how the program was developed, the modes of interaction with the industrial community and the DARPA MMIC initiative, and the particular projects being undertaken

IEEE Transactions on Components, Hybrids, and Manufacturing Technology

This paper discusses two issues concerning the accuracy of electrical characterizations of interc... more This paper discusses two issues concerning the accuracy of electrical characterizations of interconnect transmission lines, particularly in regard to a recently published paper. The error in the characteristic impedance may be reduced through an alternative approximation to the capacitance of the transmission line. Furthermore, measurements of both the propagation constant and characteristic impedance, which are the two primary parameters characterizing the line, may be improved by the use of a well-conditioned algorithm. A recent paper' discusses a procedure for determining the characteristic impedance of lossy transmission lines using measurements of the propagation constant. However, a poor assumption and an illconditioned algorithm unnecessarily limit the accuracy of the method. In order to determine the characteristic impedance Z,, the authors make use of its relationship with the propagation constant y, suggesting that their proposal is simply a modification of the relationship proposed in [ 11. However, although the above paper' suggests that Z, is proportional to 7 , [ 11 presumes an inverse relationship between the two. It is more appropriate to consider the above paper' to be a modification of [2], since [2] makes use of the exact relationship:

Journal of Research of the National Institute of Standards and Technology

1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 2000

Several lumped-element calibrations have been proposed for four-sampler vector network analyzers.... more Several lumped-element calibrations have been proposed for four-sampler vector network analyzers. This paper offers the first assessment of their accuracy in the face of imperfectly defined standards. We discover significant error and introduce a new calibration that offers demonstrably improved accuracy

Int J Electron, 1983

Coupling between waveguide and fast cyclotron modes, as expressed by the interaction impedance, i... more Coupling between waveguide and fast cyclotron modes, as expressed by the interaction impedance, is a function of waveguide geometry and mode, orbit radius, and orbit location within the guide. This paper analytically determines the impedance as a function of these variables in rectangular and circular waveguide. Plots and tables of numerical results are presented, and specific recommendations are made.

Ieee Transactions on Microwave Theory and Techniques, Dec 1, 1997

... S. Adam M. Afsar K. Agarwal GD Alley K. Anemogiannis WJ Anklam F. Arndt P. Asbeck A. Atia NF ... more ... S. Adam M. Afsar K. Agarwal GD Alley K. Anemogiannis WJ Anklam F. Arndt P. Asbeck A. Atia NF Audeh IJ Bahl AJ Bahr JW Bandler R ... B. El-Sharawy M. Faber A. Fathy M. Fennelly A. Ferraro SJ Fiedziuszko G. Franceschetti Z. Galani C. Gee G. Ghione J. Goel M. Golio MW ...