THE INFLUENCE OF CONFINEMENT ON THE HYDRODYNAMIC CHARACTERISTICS OF A CYLINDRICAL PILLAR WITHIN A MICROCHANNEL

  • Jeffers N.
  • O'Connor J.
  • Punch J.
  • Stafford J.

Microfluidic cooling technologies for future electronic and photonic microsystems require more efficient flow configurations to improve heat transfer without a hydrodynamic penalty. Although conventional microchannel heat sinks are effective at dissipating large heat fluxes, their large pressure drops are a limiting design factor. There is some evidence in the literature ...

Fair comparison of the contentionless property in OXC

  • Zami T.

By comparing 2 distinct wavelength-routing Optical Cross-Connects (OXC), this study highlights the relevance to really consider dynamic traffic when assessing the contentionless property. This paper defends our current 1830 contentionless layout versus another approach recently proposed by Huaweï at ECOC'2014. This study demonstrates why the claim of Huaweï is inappropriate.

Global Synchronization Protection for Bandwidth Sharing TCP Flows

  • Lautenschlaeger W.

Synchronization effects between bandwidth sharing TCP flows are creating large queue size variations, or, if insufficiently buffered, loss in throughput. We propose an extension to ordinary queue operation that safely suppresses the synchronization. The solution is minimalistic in a sense that it needs only few extra operations in the fast ...

OPTIMIZING ENTERPRISE FULFILLMENT THROUGH OPERATIONS BEST PRACTICES CLIMBING THE OPERATIONS MATURITY LADDER

  • Leadley J.
  • Oliver Mosquera C.

The transformation of enterprise fulfilment operations is becoming a necessity for forward-looking CSPs. In this white paper, we share best practices and show how enterprise fulfilment poses a significant opportunity to radically reduce cost and improve the customer experience. In fact, experience shows that these transformation programs can deliver on ...

Load Balancing in Heterogeneous Networks using Grammatical Evolution

  • Claussen H.
  • David Lynch
  • Kucera S.
  • Michael Fenton
  • Michael O’Neill

Grammatical Evolution (GE) is applied to the problem of load balancing in heterogeneous cellular network deployments (HetNets). HetNets are multi-tiered cellular networks for which load balancing is a scalable heuristic to maximise network capacity, assuming similar traffic from all users. This paper describes a proof of concept study in which ...

Malicious-Client Security in Blind Seer: A Scalable Private DBMS

  • Bellovin S.
  • Fisch B.
  • Kolesnikov V.
  • Krell F.
  • Kumarasubramanian A.
  • Malkin T.
  • Vo B.

The Blind Seer system (Oakland 2014) is an efficient and scalable DBMS that affords both client query privacy and server data protection. It also provides the ability to enforce authorization policies on the system, restricting client's queries while maintaining the privacy of both query and policy. Blind Seer supports a ...

Virtex-7 Platform for Optical Coherent Receivers at 100G and Beyond

  • Chen Y.
  • Kaneda N.
  • Pfau T.

Bell Labs is Alcatel-Lucent's research organization. Researchers collaborate closely with the company's customers and product development teams to create the technologies that are transforming the way people connect with each other and with the information around them. Examples of these technoliges are Alcatel-Lucent's 100G and 200G long-haul wavelength division multiplex ...

Remotely and Automatically Identify Long-Shining Rogue ONU in PON System

  • Chang Q.
  • Gao Z.
  • Sun X.
  • Xiao S.
  • Ye C.
  • Zhang K.

This paper proposed a cost-effective solution for remotely and automatically identifying long-shining rogue ONU in PON system based on low-frequency RF pilot tone signal from the ONU transmitter.

Extending Cut-and-Choose Oblivious Transfer

  • Kolesnikov V.
  • Kumaresan R.

Motivated by the recent rapid progress in improving efficiency of secure computation, we study cut-and-choose oblivious transfer - a basic building block of state-of-the-art constant round two-party secure computation protocols. In particular, we study the question of realizing cut-and-choose oblivious transfer and its variants in an OT-hybrid model. Towards this, ...

Few-Mode Optical Amplifier for LP01, LP11, LP21 and LP02 Mode Groups

  • Bigot L.
  • Charlet G.
  • Denolle B.
  • Genevaux P.
  • Jian P.
  • Labroille G.
  • Le Cocq G.
  • Morizur J.
  • Pinel O.
  • Quiquempois Y.
  • Simonneau C.

We report and fully characterize an optical amplifier capable of six-mode amplification, with erbium concentration profile adjusted for low gain excursion across the modes. We also measure Q²- factor after our amplifier for several input configurations.

6-mode Spatial Multiplexer with low loss and high selectivity for transmission over Few Mode Fiber

  • Charlet G.
  • Denolle B.
  • Genevaux P.
  • Jian P.
  • Labroille G.
  • Morizur J.
  • Pinel O.
  • Simonneau C.

We present a spatial mode multiplexer for 6 LP modes with low loss and high mode selectivity. We demonstrate 100 Gbit/s error-free transmission over 20 km for 6 modes and over 40 km bi-directional transmission with 3 modes in each direction.

Why we need a new air interface for 5G

  • Berna S.
  • Schaich F.
  • Schubert M.

Wireless communications has been renewed about every decade since the introduction of 2G (GSM - Global System for Mobile Communications [1]) - the first digital wireless communication system. Around 1990 GSM became widespread and offered voice services around the globe. With the rising success of the world wide web the ...

ELECTRIC-FIELD-ENHANCED JUMPING-DROPLET CONDENSATION

  • Enright R.
  • Miljkovic N.
  • Preston D.
  • Wang E.

When condensed droplets coalesce on a superhydrophobic nanostructured surface, the resulting droplet can jump due to the conversion of excess surface energy into kinetic energy. This phenomenon has been shown to enhance condensation heat transfer by up to 30% compared to state-of-the-art dropwise condensing surfaces. However, after the droplets jump ...

Vectoring and G.fast the ultra-broadband access technology for copper

  • Dai L.
  • Li M.
  • Lv X.

Abstract: Under the background of replacement of copper cables with optical fiber, it is beneficial for operators to fully make use of the existing copper cables for ultra-broadband access, with low construction cost and smooth evolution. This paper describes the principle of Vectoring and the performance improvement to VDSL2, as ...

Battling Googost, the Bandwidth-Stealing Bot

  • Mcnamee K.

Service providers build their businesses around their networks. Eliminating bandwidth-stealing bots such as Googost and NotCompatible , a similar web proxy bot that infects Android™ phones, is key to keeping network performance and customer satisfaction high.

Insight-Driven IMS/NFV Service Orchestration

  • Jul E.
  • Sienel J.

We describe a demonstrator showing dynamic scaling of an IMS NFVs in a cloud infrastructure based on analysis of system and application metrics. The document is a minor update of the contribution for the booklet, published in context of th BL FutureX day 2014 in Stuttgart

Network-based Video Freeze Detection/Prediction in HTTP Adaptive Streaming

  • Bostoen T.
  • Huysegems R.
  • Petrangeli S.
  • Wu T.

With the popularity of HTTP adaptive streaming technology for media delivery technology over mobile and fixed networks, the clients Quality of Experience for HAS video sessions is particularly of interests in network providers and Content Delivery Network providers. But typically, network providers are not able to directly obtain QoE relevant ...

Anticipatory resource allocation in wireless networks

  • Malanchini I.

Anticipatory resource allocation in wireless networks, presentation for the "47. meeting of the VDE/ITG-Fachgruppe 5.2.4"

ACT-5G project

  • Malanchini I.

The poster will be used during the student day at Future X Day event in Stuttgart to advertise a granted European project that will fund four Ph.D. students. The Ph.D. students will spend half of their time in ALU Stuttgart.