Present methods of space-bound communication require laser modulation, a power hungry process that can consume a significant portion of a system’s power budget. This study investigates the feasibility and characterizing metrics of a communication system which modulates sunlight. Two such proof-of-concept systems were built. The first used an unmodified monitor and webcam. It acheived a maximum ...

Distributed data management at LHC scales is a staggering task, accompanied by equally challenging practical management issues with storage systems and widearea networks. CMS data transfer management system, PhEDEx, is designed to handle this task with minimum operator effort, automating the workflows from large scale distribution of HEP experiment datasets down to reliable and scalable transfe...

Introduction: One of the current goals of the Selenoligcal and Engineering Explorer “KAGUYA” (SELENE) and the Moon Mineralogy Mapper (M, aboard Chadrayaan-1) missions is the accurate determination of surface composition. These data are being collected with the knowledge that when light interacts with an airless body surface it is either absorbed or reflected in a way unique to each of the most ...

The basic virtual memory-mapped communication (VMMC) model provides protected, direct communication between the sender's and receiver's virtual address spaces, but it does not support high-level connection-oriented communication APIs well. This paper presents VMMC-2, an extension to the basic VMMC. We describe the design, implementation, and evaluate the performance of three mechanisms in VMMC-...

Next Generation Networks will be comprised of different access technologies. We are already seeing the emergence of mobile devices with the capability of connecting to heterogeneous networks with different capabilities and constraints. In addition, many bandwidth intensive applications have rather relaxed real-time constraints allowing for alternative scheduling mechanisms which can take into a...

Big data scientists routinely transfer massive amounts of data. By understanding and modelling different aspects of these data transfers, we can make using big data more efficient and user-friendly. In this paper, we first develop a set of data storage location prediction heuristics. These heuristics help big data scientists manage and discover locations to transfer their data from and to. We s...

infonnation transferred, refer to the accompanying paper on This paper discusses the timing interface design subsystem in data transfer interface design [6]. To transfer state or timing DAME (Design A utomation of M icroprocessor based infonnation, a timing reference is always required. When systems, using an Expert system approach). The timing connecting two devices, this timing reference must...

In this paper, a review of the progress and initiatives in free space optical data transfer and communications at the Naval Research Laboratory is presented. NRL has been investing in research and development in optical communications and laser ranging, both conventional, and advanced. Efforts include developing amplifiers and components for lasers to be used in long range, one-way and retro-re...

After taking pictures, photographers often seek to convey their unique moods by altering the style of their photographs, which can involve meticulous contrast management, lighting, dodging, and burning. In this sense, not only are advanced photographers concerned about their pictures’ styles; casual photographers who take pictures with cellphone cameras also process their pictures using built-i...