Structural studies of ultrathin zirconia dielectrics

  • Luning J.
  • Mcintyre P.
  • Muller D.
  • Pianetta P.
  • Ramanathan S.

We present detailed structural and chemical studies on ultrathin zirconia films grown by ultraviolet oxidation and natural (no ultraviolet light) oxidation of Zr precursor metal layers on SiO2-passivated Si(100) wafers. Quantitative electron-energy-loss spectroscopy (EELS) was used to obtain the chemical composition and electronic structure on an atomic scale. The EELS ...

User-level performance of elastic traffic in a differentiated-services environment

  • Borst S.
  • Nunez-Queija R.
  • Van Uitert M.

We consider a system with two service classes, one of which supports elastic traffic. The traffic characteristics of the other class can be completely general, allowing streaming applications as an important special case. The link capacity is shared between the two traffic classes in accordance with the generalized processor sharing ...

A closed form formula for long-lived TCP connections throughput

  • Chaintreau A.
  • De Vleeschauwer D.

In this paper, we study the variation of the throughput achieved by TCP resulting from both the individual behavior of a connection and the interaction with all other connections sharing the same link. In particular, we calculate the tail distribution function (TDF) of the instantaneous throughput seen by one TCP ...

Exploring the limits of Arrhenius-based life testing with heterojunction bipolar transistor technology

  • Blanck H.
  • D'Haen J.
  • D'Olieslager M.
  • De Ceuninck W.
  • De Schepper L.
  • Petersen R.
  • Pons D.
  • Vendier O.

With the introduction of HBTs based on InGaP the device reliability could be dramatically improved. Life tests at junction temperatures of 225degreesC showed no significant device degradation after 1000 hours of test time. In order to obtain significant device degradation within reasonable test times, the applied stress must be increased ...

Reliability problems of passive optical devices and modules after mechanical, thermal and humidity testing

  • Duerr K.
  • Pusch R.
  • Schmitt G.

The market of passive optical devices is evolving rapidly. New technologies are introduced that have not proven yet long-term reliability in the field. Additional challenges arise from packaging of the modules that have not always been taken into account appropriately. The report is based on our test results over the ...

New qualification approach for optoelectronic components

  • Berthier P.
  • Boddaert X.
  • Goudard J.
  • Laffitte D.
  • Perinet J.

Optoelectronic components reliability is currently assessed through standard qualification tests. Although useful for a comparison between different products, this approach presents several drawbacks which will be discussed. A new qualification methodology is proposed to provide customers with relevant reliability data and improve the confidence level about product quality, while adapting ...

Statistical analysis of pulse propagation driven by polarization-mode dispersion

  • Fatome J.
  • Garnier J.
  • Le Meur G.

The linear propagation of pulses driven by random polarization-mode dispersion is considered. Analytical expressions are derived for the probability-density functions of the pulse width, timing displacement, and degree of polarization. The study is performed in Stokes space, and frequency correlation between modes is shown to play an important role in ...

An integrated technique for task matching and scheduling onto distributed heterogeneous computing systems

  • Ahmad I.
  • Dhodhi M.
  • Yatama A.

This paper presents a problem-space genetic algorithm (PSGA)-based technique for efficient matching and scheduling of an application program that can be represented by a directed acyclic graph, onto a mixed-machine distributed heterogeneous computing (DHC) system. PSGA is an evolutionary technique that combines the search capability of genetic algorithms with a ...

A study of adaptive forward error correction for wireless collaborative computing

  • Mani A.
  • Mckinley P.
  • Tang C.

This paper addresses the problem of reliably multicasting Web resources across wireless local area networks (WLANs) in support of collaborative computing applications. An adaptive forward error correction (FEC) protocol is described, which adjusts the level of redundancy in the data stream in response to packet loss conditions. The proposed protocol ...

Scheduling transactions with temporal constraints: Exploiting data semantics

  • Ramamritham K.
  • Sivasankaran R.
  • Stankovic J.
  • Towsley D.
  • Xiong M.

In this paper, issues involved in the design of a real-time database which maintains data temporal consistency are discussed. The concept of data-deadline is introduced and time cognizant transaction scheduling policies are proposed. Informally, data-deadline is a deadline assigned to a transaction due to the temporal constraints of the data ...

Bounds on packings of spheres in the Grassmann manifold

  • Barg A.
  • Yu D.

We derive the Gilbert-Varshamov and Hamming bounds for packings of spheres (codes) in the Grassmann manifolds over R and C. Asymptotic expressions are obtained for the geodesic metric and projection Frobenius (chordal) metric on the manifold.

Maximum signal-to-noise ratio array processing for space-time coded systems

  • Geraniotis E.
  • Su H.

We consider the design of an array processor for space-time coded multi-antenna systems. As an alternative to the previously proposed zero-forcing method, in this paper, the maximum signal-to-noise ratio (SNR) criterion is used to obtain a balance between interference suppression and noise enhancement. Although the same in concept, this work ...

Dispersion-free (de)mux with record figure-of-merit

  • Doerr C.
  • Neilson D.
  • Yu C.
  • Zirngibl M.

The authors demonstrate a wavelength (de)mux that is dispersion-free and has significantly better figure-of-merit, defined as 1-dB bandwidth over 20-dB bandwidth, over existing devices. A four-channel demux has been fabricated and the figure-of-merit is 97%. A practical system application of this device has also been demonstrated.

Average dispersion decreasing densely dispersion-managed fiber transmission systems

  • Dinda P.
  • Moubissi A.
  • Nakkeeran K.
  • Wabnitz S.

The authors propose an average dispersion decreasing densely dispersion-managed (A4DM) fiber line, which can substantially improve the performance of high-speed optical transmission systems. They show that the A4DM fiber lines have many advantages over the densely dispersion-managed fiber lines.

Constrained mirror placement on the Internet

  • Cronin E.
  • Jamin S.
  • Jin C.
  • Kurc A.
  • Raz D.
  • Shavitt Y.

Web content providers and content distribution network (CDN) operators often set up mirrors of popular content to improve performance. Due to the scale and decentralized administration of the Internet, companies have a limited number of sites (relative to the size, of the Internet) where they can place mirrors. We formalize ...

Mobility management in third-generation all-IP networks

  • Chiussi F.
  • Khotimsky D.
  • Krishnan S.

It is now widely recognized that using IP as the foundation for next-generation mobile networks makes strong economic and technical sense, since it takes advantage of the ubiquitous installed IP infrastructure, capitalizes on the IETF standardization process, and benefits from both existing and emerging IP-related technologies and services. The large-scale ...

Unconventional carrier-mediated ferromagnetism above room temperature in ion-implanted (Ga, Mn)P : C

  • Abernathy C.
  • Chu S.
  • Hebard A.
  • Overberg M.
  • Pearton S.
  • Theodoropoulou N.
  • Wilson R.

Ion implantation of Mn ions into hole-doped GaP has been used to induce ferromagnetic behavior above room temperature for optimized Mn concentrations near 3 at. %. The magnetism is suppressed when the Mn dose is increased or decreased away from the 3 at. % value, or when n-type GaP substrates ...

Multi-User Preemptive Scheduling For Critical Low Latency Communications in 5G Networks

5G new radio is envisioned to support three major service classes: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communications. Emerging URLLC services require up to one millisecond of communication latency with 99.999% success probability. Though, there is a fundamental trade-off between system spectral efficiency (SE) ...