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Realizing common communication patterns in partitioned optical passive stars (POPS) networks

G. Gravenstreter, R.G. Melhem
1998 IEEE transactions on computers  
We consider the problem of realizing several common communication structures in the all-optical Partitioned Optical Passive Stars (POPS) topology.  ...  We show that, often, the obvious or "natural" method of implementing a communication pattern in the POPS does not efficiently utilize its communication capabilities.  ...  Part of this work was presented at the Second International Conference on Massively Parallel Processing Using Optical Interconnections, San Antonio, Texas, 1995.  ... 
doi:10.1109/12.713318 fatcat:3lmd7tcyefekhb5wy4zykju3da

Basic Operations on a Partitioned Optical Passive Stars Network with Large Group Size [chapter]

Amitava Datta, Subbiah Soundaralakshmi
2002 Lecture Notes in Computer Science  
In a Partitioned Optical Passive Stars (POPS) network, n = dg processors are divided into g groups of d processors each and such a POPS network is denoted by P OP S(d, g).  ...  passive stars network, arithmetic operations P.M.A.  ...  Introduction The Partitioned Optical Passive Stars (POPS) network was proposed in [3] [4] [5] 7 ] as a fast optical interconnection network for a multiprocessor system.  ... 
doi:10.1007/3-540-46043-8_30 fatcat:366tbvs6dzavxkfaiqjsa33jni

Parallel Computation Of Data Summation For Multiple Problem Spaces On Partitioned Optical Passive Stars Network

Khin Thida Latt, Mineo Kaneko, Yoichi Shinoda
2007 Zenodo  
In Partitioned Optical Passive Stars POPS network,nodes and couplers become free after slot to slot in some computation.It is necessary to efficiently utilize free couplers and nodes to be cost effective  ...  The Partitioned Optical Passive Stars (POPS) network was proposed in [3] , [4] , [5] , [6] , [7] , [8] , and [9] as a fast optical interconnection network for multiprocessor systems.  ...  The optical passive star (OPS) is often suggested as a platform for implementing the optical network.  ... 
doi:10.5281/zenodo.1056647 fatcat:luqnzw2fkfhhzcoskwuht2gahm

Optimal transmission schedules in TWDM optical passive star networks

Sang-Kyu Lee, A. Duksu Oh, Hongsik Choi, Hyeong-Ah Choi
1997 Discrete Applied Mathematics  
This paper is concerned with optimal transmission schedules in the TWDM (time and wavelength division multiplexed) optical passive star network.  ...  An optimal transmission schedule is defined to be the one that schedules transmissions such that for each node u in V, the transmitter in u transmits once to every receiver in V -{u} within a repeating  ...  In this paper, we consider the following TWDM optical passive star network [3, 7, 8] . The physical architecture of the network has N inputs and N outputs connected by an optical passive star.  ... 
doi:10.1016/s0166-218x(96)00081-9 fatcat:kw6bwiwj6rbnrcpwsb7poii7w4

Lagrangian transport and chaotic advection in three-dimensional laminar flows [article]

Michel Speetjens, Guy Metcalfe, Murray Rudman
2019 arXiv   pre-print
Transport and mixing of scalar quantities in fluid flows is ubiquitous in industry and Nature. Turbulent flows promote efficient transport and mixing by their inherent randomness.  ...  with plane x = 0 exposing KAM tori embedded in chaos.  ...  Thus scalar C is passively advected by fluid parcels, i.e.  ... 
arXiv:1904.07580v1 fatcat:gt5hopaqubgsxi4r67f5bvny4q

Towards compelling cases for the viability of silicon-nanophotonic technology in future manycore systems

Luca Ramini, Herve Tatenguem Fankem, Alberto Ghiribaldi, Paolo Grani, Marta Ortin-Obon, Anja Boos, Sandro Bartolini
2014 2014 Eighth IEEE/ACM International Symposium on Networks-on-Chip (NoCS)  
GWOR does not support self-communication, hence its use for the memory request The Design Predictability Gap in Optical Networks-on-Chip Design 4.6 Network Partitioning 65 6 Network Partitioning  ...  vs, Global Ring 76 The Design Predictability Gap in Optical Networks-on-Chip Design filter-based topologies, both in the global connectivity and the network partitioning cases.  ... 
doi:10.1109/nocs.2014.7008778 dblp:conf/nocs/RaminiFGGOBB14 fatcat:rfhirddgcrflld2hjkb24ajzti

Herschel-ATLAS/GAMA: What determines the far-infrared properties of radio galaxies?★

J. S. Virdee, M. J. Hardcastle, S. Rawlings, D. Rigopoulou, T. Mauch, M. J. Jarvis, A. Verma, D. J. B. Smith, I. Heywood, S. V. White, M. Baes, A. Cooray (+11 others)
2013 Monthly notices of the Royal Astronomical Society  
We perform a stacking analysis of H-ATLAS data in order to obtain isothermal dust temperatures and rest-frame luminosities at 250um (L250), for 1599 radio sources over the H-ATLAS P1 GAMA area.  ...  US participants in H-ATLAS acknowledge support provided by NASA through a contract issued from JPL.  ...  However, the bright-end problem remains; the ejected gas in systems embedded in higher mass haloes cannot escape and therefore cools back on to the central galaxy, stimulating star formation (SF) and by  ... 
doi:10.1093/mnras/stt488 fatcat:g2wiy43gofbcvidzl54pyxwqtm

A class of scalable optical interconnection networks through discrete broadcast-select multi-domain WDM

K.A. Aly, P.W. Dowd
Proceedings of INFOCOM '94 Conference on Computer Communications  
Passive star-coupled optical interconnects with wavelength-division multiplexing hold a strong potential for realizing flexible large-scale multicomputer networks.  ...  Interconnecting the clusters according to a regular topology results in a modular architecture with reconfigurable partitions and significantly reduced fiber link density.  ...  Single star virtual point-to-point WDM networks are limited in size to a few tens of nodes.  ... 
doi:10.1109/infcom.1994.337595 dblp:conf/infocom/AlyD94 fatcat:qt6q47i23rgxhgkc2cbcwpi5fe

The Origins Space Telescope (OST) Mission Concept Study Interim Report [article]

The OST mission concept study team
2018 arXiv   pre-print
OST's dramatic increase in sensitivity over previous missions ensures breakthrough discoveries in a broad range of astrophysics disciplines.  ...  Other bright, far-infrared lines, [OIII] 57 and [NII] 122, trace the most-embedded HII regions surrounding young stars.  ...  The OST observatory power system design allows partitioned powering for on-orbit servicing.  ... 
arXiv:1809.09702v1 fatcat:mchsxu2sjzczpnrafpqwnfukum

Layout-conscious random topologies for HPC off-chip interconnects

M. Koibuchi, I. Fujiwara, H. Matsutani, H. Casanova
2013 2013 IEEE 19th International Symposium on High Performance Computer Architecture (HPCA)  
Random network topologies can be used to achieve low hop counts between nodes and thus low latency.  ...  In this work we propose two new methods for generating random topologies and their physical layout on a floorplan: randomize links after optimizing the physical layout, or optimize the layout after randomizing  ...  In addition, the cost of the cabling medium increases with the cable length between cabinets (e.g., for InfiniBand the typical maximum length of passive copper is 10m, while embedded optical is 100m [  ... 
doi:10.1109/hpca.2013.6522343 dblp:conf/hpca/KoibuchiFMC13 fatcat:lkozfi554fffrfvxfgomoj2pc4

LISA and its pathfinder

2015 Nature Physics  
Figure 3 . 3 3.: Partition of the NGO measurement.  ...  panel), when a massive, rotating nuclear gaseous disc embedded in a series of large-scale ring-like structures has formed.  ...  AM CVn class of cataclysmic variable stars. AO Announcement of Opportunity. AOCS attitude and orbit control system. ASD amplitude spectral density.  ... 
doi:10.1038/nphys3420 fatcat:wd3c5hqonzedbmjb2tod4a3r7m

Hypercube connected rings: a scalable and fault-tolerant logical topology for optical networks

S. Banerjee, D. Sarkar
2001 Computer Communications  
In a hypercube, the nodal degree increases with the number of nodes. Hence, the per-node cost of the network increases as the network size grows.  ...  However, in a hypercube connected ring network (HCRNet) the nodal degree is small and it remains constant, independent of the network population.  ...  This network topology can be realized as a passive broadcast star network in a local area environment or it can be conceived as a wide area optical network via wavelength routers and converters.  ... 
doi:10.1016/s0140-3664(00)00336-4 fatcat:ppzxrq43e5hw7jelfpmh4zlcwy

Physical processes in protoplanetary disks [article]

Philip J. Armitage
2017 arXiv   pre-print
This review introduces physical processes in protoplanetary disks relevant to accretion and the initial stages of planet formation.  ...  theory of disk structure and evolution, review the gas-phase physics of angular momentum transport through turbulence and disk winds, and discuss possible origins for the episodic accretion observed in  ...  of accretion tori.  ... 
arXiv:1509.06382v2 fatcat:gm4qdjxtbffinftrgx7iop6g3y

Computer Vision for Autonomous Vehicles: Problems, Datasets and State of the Art [article]

Joel Janai, Fatma Güney, Aseem Behl, Andreas Geiger
2021 arXiv   pre-print
Recent years have witnessed enormous progress in AI-related fields such as computer vision, machine learning, and autonomous vehicles.  ...  While several survey papers on particular sub-problems have appeared, no comprehensive survey on problems, datasets, and methods in computer vision for autonomous vehicles has been published.  ...  Towards this goal, they train a network to predict similar embedding vectors for corners of the same bounding box, which allows them to group the corners according to the distance between the embeddings  ... 
arXiv:1704.05519v3 fatcat:xiintiarqjbfldheeg2hsydyra

Telecommunication [1935]

S. H. Witt
2010 Telecommunications Journal of Australia  
Noble: We think social networking or social computing is huge. People spend a lot of their time already on social networking sites.  ...  The latest statistic that I came across is that you spend one in six minutes on sites like Facebook, Twitter or LinkedIn. It's phenomenal. ACKNOWLEDGEMENTS  ...  FTTC: ETHERNET OVER PASSIVE OPTIC NETWORK Some network operators have deployed this as an intermediate stage to provide all-IP to some customers.  ... 
doi:10.2104/tja10034 fatcat:ioc6onbktnawpbhktw67iebquq
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