Ga-doped ZnO single crystal nanotips grown on fused silica by metalorganic chemical vapor deposition

  • Chen Y.
  • Garfunkel E.
  • Jiang W.
  • Lu Y.
  • Muthukumar S.
  • Ng H.
  • Zhong J.

In situ Ga-doped ZnO nanotips were grown on amorphous fused silica substrates using metalorganic chemical vapor deposition. Structural, optical and electrical properties of as-grown ZnO nanotips are investigated. Despite the amorphous nature of fused-silica substrates, Ga-doped ZnO nanotips are found to be single crystalline and oriented along the c-axis. Photoluminescence ...

Face-Selective Nucleation of Calcite on Self-Assembled Monolayers of Alkanethiols: Effect of the Parity of the Alkyl Chain

  • Aizenberg J.
  • Han Y.

Self-assembled monolayers (SAMs) of mercaptoalkanoic acids on gold and silver films were utilized to direct the nucleation of calcite crystals. The nucleation plane of calcite crystals on SAMs is determined by the parity of the methylene groups (odd and even effect) of the carboxylic acid functionalized alkylthiols on gold and ...

Improving TCP/IP Performance over Third Generation Wireless Networks

  • Chan M.
  • Ramjee R.

As third generation (3G) wireless networks with high data rate get widely deployed, optimizing TCP performance over these networks would have a broad and significant impact on data application performance. One of the biggest challenges in optimizing TCP performance over the 3G wireless networks is adapting to the significant delay ...

Towards Planar Processing for InP DHBTs

  • Chen Y.
  • Houtsma V.
  • Kopf R.
  • Sung W.
  • Weimann N.
  • Yang Y.

Silicon-like planar InP DHBTs have always been the goal for researchers to enhance their integration capabilities. In addition, heat dissipation for large-scale device integration will be an issue for the traditional mesa DHBT structure while maintaining high-speed performance. We demonstrate that by developing ion-implantation technologies, planar InP DHBTs can be ...

Photonic Crystal Enhanced Optical Interconnects

  • Slusher R.

We will describe photonic bandgap and microdisk enhanced optical modulators and optical switches that can be used in planar lightwave integrated circuits that could facilitate “smart” optical interconnects in future intelligent networks.

Bipartite Domination and Simultaneous Matroid Covers

  • Ko C.
  • Shepherd F.

Damaschke et al. gave a polynomial time algorithm to solve the minimum dominating set problem in {em convex} bipartite graphs $B=(X cup Y,E)$. That is, where the nodes in $Y$ can be ordered so that each node of $X$ is adjacent to a contiguous sequence of nodes. Gamble et al. ...

Measurement of the Casimir force between dissimilar metals

  • Decca R.
  • Fischbach E.
  • Krause D.
  • Lopez O.

The first precise measurement of the Casimir force between dissimilar metals is reported. The attractive force, between a Cu layer evaporated on a microelectromechanical torsional oscillator, and an Au layer deposited on an Al2O3 sphere, was measured dynamically with a noise level of 6 fN/(Hz)^1/2. Measurements were performed for separations ...

Reply to ``Comment on ``Some implications of the quantum nature of laser fields for quantum computations'' ''

  • Kimble H.
  • Van Enk S.

We point out several superficialities in Itano's comment (quant- ph/0211165).

Efficient Location Area Planning for PErsonal Communication Systems

  • Bejerano Y.
  • Immorlica N.
  • Naor J.
  • Smith M.

A central problem in personal communication systems is to optimize bandwidth usage. Network mobility management, and in particular, location management, consumes a significant portion of bandwidth, which is a necessary overhead for supporting mobile users. We focus our efforts on minimizing this overhead. Unlike previous works, we concentrate on optimizing ...

Extrinsic Information Transfer Functions: Model and Erasure Channel Properties

  • Ashikhmin A.
  • Kramer G.
  • Ten Brink S.

Extrinsic information transfer (EXIT) charts are a tool for predicting the convergence behavior of iterative decoding of concatenated codes. A general decoding model is introduced that applies to many communication situations, including the decoding of parallel concatenated (turbo) codes, serially concatenated codes, low-density parity-check codes, and repeat-accumulate codes. EXIT functions ...

Light scattering observations of spin reversal excitations in the fractional quantum Hall regime

  • Dennis B.
  • Dujovne I.
  • Hirjibehedin C.
  • Kang M.
  • Pfeiffer L.
  • Pinczuk A.
  • West K.

Resonant inelastic light scattering experiments access the low lying excitations of electron liquids in the fractional quantum Hall regime in the range 2/5 >= nu >= 1/3. Modes associated with changes in the charge and spin degrees of freedom are measured. Spectra of spin reversed excitations at¯filling factor nu= 1/3 ...

APP Processing for High Performance MIMO Systems

  • Davis L.
  • Garrett D.
  • Hochwald B.
  • Ten Brink S.

One of the most demanding components in a multiple-input multiple-output (MIMO) receiver is the symbol detector. While linear cancellation techniques are typically used, the optimum maximum likelihood (ML) search algorithm combined with soft output proces sing, e.g. a posteriori probability (APP), offers superior performance and is feasible in current technology. ...

Towards Federated Policy Management: Distributing a Ruleset Across Multiple Policy Enforcement Points

  • Hull R.
  • Kumar B.
  • Lieuwen D.

In both data networks and telecommunication networks we are seeing a substantial growth in the number of policy engines and policy-enabled services and applications. We argue that end- users and network operators will need to have a unified, conceptually centralized ``view'' of the policies that they have specified and a ...

Tradeoff Between Coverage and Capacity in Dynamic Optimization of 3G Cellular Networks

  • Clarkson K.
  • Hampel K.
  • Hobby J.
  • Polakos P.

For 3G cellular networks, capacity becomes an additional objective along with coverage when characterizing the performance of high-data-rate services. Since network capacity depends on the degree traffic load is balanced over all cells, changing traffic patterns demand dynamic network reconfiguration to maintain good performance. We study the competitive character network ...

1 Tb/s (6 x 170.6 Gb/s) Transmission Over 2000 km NZDF Using OTDM and RZ-DPSK Format

  • Bernasconi P.
  • Doerr C.
  • Gnauck A.
  • Leuthold J.
  • Raybon G.
  • Stulz L.

We demonstrate six-channel, 160-Gb/s WDM transmission over twenty 100-km spans of non-zero-dispersion fiber, with a spectral efficiency of 0.53 b/s/Hz. We achieve this result using optical- time-division multiplexing and return-to-zero differential- phase-shift-keying modulation format. We also operate at 170. 6 Gb/s per channel to emulate the use of forward error ...

On the bandwidth of higher-order polarization-mode dispersion: the Taylor series expansion

  • Chen H.
  • Jopson R.
  • Kogelnik H.

The bandwidth limitations of Poole’s higher-order polarization- mode dispersion (PMD) interpretation are examined. Correlations and errors related to the truncation of the PMD Taylor series are determined by analysis and simulation. As the PMD order increases, the effective bandwidth of the Poole representation is found to grow slowly beyond the ...

Routing and Design in K-shared Networks

  • Alicherry M.
  • Phadke C.
  • Poosala V.

Fast shared restoration is critical to the success of WDM mesh networking. A restricted form of sharing called K-sharing was recently proposed, which allows rapid, signaling-free restoration. However, the routing and design algorithms used for traditional shared restoration do not work for this scheme. Also, K-sharing can potentially increase capacity ...

Unambiguous discrimination of mixed states

  • Rudolph T.
  • Spekkens R.
  • Turner P.

We present the conditions under which probabilistic error-free discrimination of mixed states is possible, and provide upper and lower bounds on the maximum probability of success for the case of two mixed states. We solve certain special cases exactly, and demonstrate how the problems of state filtering and state comparison ...

Software Model Checking: The VeriSoft Approach

  • Godefroid P.

Verification by state-space exploration, also often referred to as {em model checking}, is an effective method for analyzing the correctness of concurrent reactive systems (for instance, communication protocols). Unfortunately, traditional model checking is restricted to the verification of properties of models, i.e., {em abstractions}, of concurrent systems. We discuss in ...

Blocking Probabilities for an Underloaded or Overloaded Link with Trunk Reservation

  • Knessl C.
  • Morrison J.

A single link in a circuit-switched network is considered. The link has C circuits, R of which are reserved for the primary traffic. Offered calls arrive in independent Poisson streams with mean rates lambda and nu for the primary and secondary traffic, respectively, and corresponding independent and exponentically distributed holding ...