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Developing software systems that are complicated and critical gives challenges to software engineers and the software industry. Intelligent software agent design is one such application domain that imposes challenges. The application of formal methods in software engineering, specifically with executable software specification languages, can involve much learning among the users of the system. Although...
PON monitoring based on combined Optical Time Domain Reflectometry (OTDR) and Optical Transceiver Monitoring (OTM) is presented. The results on a 25-km 1:32 PON prove the concept and show ~0.02 dB accuracy with theoretical values.
An important goal in nano science is to unlock previously inaccessible physics and dynamics within nanoscale systems by combining the efficient nanoscale field confinement/optical resolution (∼10 nm) of optical antennae and the ultrafast temporal resolution (fs) inherent in optical studies with the capabilities of modern scanning probe techniques. Here we report on a significant step toward this goal...
In this paper we give an overview of different approaches to reduce the influence of the interferometric crosstalk in a Passive Optical Network employing Wavelength Division Multiplexing (WDM-PON) and a Reflective Semiconductor Optical Amplifier-based (RSOA) transceiver in the Optical Network Unit (ONU). Key advantages and disadvantages of each method are given.
We present experiments on a wavelength-flexible WDM/TDM-PON with an integrated reconfigurable OADM and a reflective electro-absorption modulator. We successfully transmit multiple wavelength channels of 10 Gbit/s each over 27 km SSMF in different bandwidth allocation schemes.
This paper is focused in the domain of peak to average power ratio (PAPR) reduction of orthogonal frequency division multiplex (OFDM) signals. Combination of partial transmit sequences (PTS) and simplified clipping and filtering with bounded distortion (SCAFBD) is proposed. The first mentioned method is distortionless, but needs to transmit a side information in every OFDM symbol. The second method...
This paper is focused in the domain of peak to average power ratio (PAPR) reduction of orthogonal frequency division multiplex (OFDM) signals. The main idea is to use a combination of data interleaving with repeated clipping and filtering method (or its improved noniterative version) in order to increase the overall performance for the PAPR reduction. The performance is evaluated in AWGN channel with...
The international linear collider (ILC) damping rings will require construction of wiggler magnets of high field quality on a large scale. We consider various designs derived from the wigglers presently in operation at the Cornell electron storage ring (CESR). Design optimization has been performed based on detailed tracking calculations of dynamic aperture and tune footprint in a full model of the...
Beginning in April 2008, we propose to employ the Cornell electron storage ring (CESR) in a program of research and development for the international linear collider (ILC) Damping Rings (DR). This paper provides an update on the conceptual design issues for the CESR reconfiguration and details of the experimental program that will follow.
The Semantic Gap is considered to be a bottleneck in image and video retrieval. One way to increase the communication between user and system is to take advantage of the user's action with a system, e.g. to infer the relevance or otherwise of a video shot viewed by the user. In this paper we introduce a novel video retrieval system and propose a model of implicit information for interpreting the user's...
The major disadvantage of orthogonal frequency division multiplex (OFDM) is the high peak to average power ratio (PAPR) of the transmitted signal. The main idea of this paper is to use a combination of two appropriate methods. First is the distortionless method using data interleaving. Second is the distortion method of repeated clipping and filtering. This combination expects better PAPR reduction...
The ALICE trigger system consists of the Central Trigger Processor (CTP) and 24 Local Trigger Units (LTU) that act as a uniform interface to sub-detector front-end electronics. The CTP generates three levels of hierarchical hardware triggers - L0, L1 and L2. At any time, the 24 sub-detectors of the ALICE experiment are dynamically partitioned into up to 6 independent clusters. Trigger selection includes...
The ALICE trigger system is situated in the experimental cavern and has a centralized layout: the central trigger processor (CTP), the sub-detector interface (local trigger unit) and the TTC partitions are all installed in adjacent racks. The CTP generates three levels of hierarchical hardware triggers - LO, LI and L2. At any time, the 24 sub-detectors of the ALICE experiment are dynamically partitioned...
The integrated coastal observation system (ICOS) represents an improvement in the capabilities of underway coastal marine measurement by incorporating in situ biological, chemical, and physical sensors in an undulating vehicle with a mobile, sea-going laboratory van capable of further analysis of critical seawater properties on pumped samples. This mobile lab undulating vehicle system is capable of...
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