329,164 research outputs found
Fully pipelined bloom filter architecture
No full textRecently, we proposed a two-stage pipelined Bloom filter architecture to save power for network security applications. In this letter, we generalize the pipelined Bloom filter architecture to k-stage and show that significant power savings can be achieved by employing one hash function per stage. We analytically show that the expected power consumption and latency of the fully pipelined Bloom filter architecture will not be greater than that of the two hash functions and two clock cycles, respectively, however large the number of hash functions is. Furthermore, we discuss the worst-case performance of the proposed architecture.Recently, we proposed a two-stage pipelined Bloom filter architecture to save power for network security applications. In this letter, we generalize the pipelined Bloom filter architecture to k-stage and show that significant power savings can be achieved by employing one hash function per stage. We analytically show that the expected power consumption and latency of the fully pipelined Bloom filter architecture will not be greater than that of the two hash functions and two clock cycles, respectively, however large the number of hash functions is. Furthermore, we discuss the worst-case performance of the proposed architectur
The Madagascar Bloom – a serendipitous study
No full textThe late austral summer (February-April) phytoplankton bloom that occurs east of Madagascar exhibits significant interannual variability and at its largest extent covers ~1% of the world’s ocean surface area. The bloom raises many intriguing questions about how it begins, is sustained, propagates to the east, exports carbon and ends. It has been observed and studied using satellite ocean color observations, but the lack of in situ data makes it difficult to address these questions. Here we describe observations that were made serendipitously on a cruise in February 2005. These show clearly for the first time the simultaneous existence of a deep chlorophyll maximum at ~70-110 m depths (seen in SeaSoar fluorimeter data) and a surface chlorophyll signature (seen in SeaWiFS satellite ocean color data). The observations also show the modulation of biological signature at the surface by the eddy field, but not of the deep chlorophyll maximum. Trichodesmium dominates the bloom nearer to Madagascar, while the diatom Rhizosolenia clevei (and its symbiont Richelia intracellularis) dominates further from the island. The surface bloom seen in the SeaWiFS data is confined to the shallow (~30 m) mixed layer. It is hypothesized that the interannual variability in bloom intensity may be due to variations in coastal upwelling and thus the supply of iron, which is a micronutrient that can limit diazotroph growth
Adding Bloom to High-Dynamic-Range Tone Mapping
No full textWe present a technique for enhancing high-dynamic-range tone mapping algorithms by adding the bloom effect to bright areas. Bloom is based on the fact that real-life lenses convolve light and make bright areas emit a glow. The algorithm takes a set of images with different exposures as input, and performs a tone mapping algorithm on these. It then takes the image with the lowest exposure value to create the bloom effect. It then perform a convolution on this image with with a kernel that represents the response to one point of light. The resulting image is then added on top of the tone mapped image. We also present parameters to change the spread of the glowing effect, how bright an area needs to be to get a significant glow, and the intensity of the glow when applied. Furthermore, the kernel can be changed to create different types of glow and highlights. These things make the technique versatile and allows the photographer to customize the effect.https://github.com/ricardovogel/tonemap-and-bloom Code repositoryCSE3000 Research ProjectComputer Science and Engineerin
Low-power bloom filter architecture for deep packet inspection
No full textBloom filters are frequently used to identify malicious content like viruses in high speed networks. However, architectures proposed to implement bloom filters are not power efficient. In this letter, we propose a new bloom filter architecture that exploits the well-known pipelining technique. Through power analysis we show that pipelining can reduce the power consumption of bloom filters up to 90%, which leads to the energy-efficient implementation of intrusion detection systems
Energy-efficient pipelined bloom filters for network intrusion detection
No full textSoftware-based detection techniques are commonly used to identify the predefined signatures in network streams. However, the software-based techniques can not keep up with the speeds that network bandwidth increases. Hence, hardware-based systems have started to emerge. Bloom filters are frequently used to identify malicious content like viruses in high speed networks. However, architectures proposed to implement Bloom filters are not power efficient. We propose a new Bloom filter architecture that exploits the well-known pipelining technique. Through extensive power analysis we show that pipelining can reduce the power consumption of Bloom filters up to 90%, which leads to the energy-efficient implementation of network intrusion detection system
Physical controls and mesoscale variability in the Labrador Sea spring phytoplankton bloom observed by Seaglider
No full textWe investigated the 2005 spring phytoplankton bloom in the Labrador Sea using Seaglider, an autonomous underwater vehicle equipped with hydrographic, bio-optical and oxygen sensors. The Labrador Sea blooms in distinct phases, two of which were observed by Seaglider: the north bloom and the central Labrador Sea bloom. The dominant north bloom and subsequent zooplankton growth are enabled by the advection of low-salinity water from West Greenland in the strong and eddy-rich separation of the boundary current. The glider observed high fluorescence and oxygen supersaturation within haline-stratified eddy-like features; higher fluorescence was observed at the edges than centers of the eddies. In the central Labrador Sea, the bloom occurred in thermally stratified water. Two regions with elevated subsurface chlorophyll were also observed: a 5 m thin-layer in the southwest Labrador Current, and in the Labrador shelf-break front. The thin layer observations were consistent with vertical shearing of an initially thicker chlorophyll patch. Observations at the front showed high fluorescence down to 100 m depth and aligned with the isopycnals defining the front. The high-resolution Seaglider sampling across the entire Labrador Sea provides first estimates of the scale dependence of coincident biological and physical variables
YMCA Instructor Invents New Game, by R. E. Bloom
No full textThis is page five page six of an unknown publication. The main article these pages contain is titled, "YMCA Instructor Invents New Game," by R. E. Bloom. It talks about Dr. James Naismith and the creation of Basketball. Also included is a photograph of Naismith carrying a basketball, the photo of some of the first basketball players and a listing of the original rules of the game. On Page five there is also a continuation of a story about King Edward VIII.To learn more about Dr. James Naismith, see: https://springfield.as.atlas-sys.com/agents/people/64
No. 662 John Porter Bloom
No full textTranscript (28 pages) of an interview by Greg Smoak and Greg Thompson with John Porter Bloom at Oakland, California, on 15 October 2011. Part of the Western History Association Oral History Project, Everett Cooley Collection tape no. U-3099Mr. Bloom talks about the history of and his involvement in the Western History Association (WHA). He discusses the founding of the organization, important individuals connected to the WHA and the annual meetings. Mr. Bloom served as secretary-treasurer and as president of the WHA, which he discusses. He details his educational training and experiences, as well as his work on the Territorial Papers of the US at the National Archives. Mr. Bloom relates the changes he´s observed in the WHA during the span of his involvement. Project: Western History Association. Interviewer: Greg Smoa
No. 661 Jo Tice Bloom
No full textTranscript (19 pages) of an interview by Greg Smoak with Jo Tice Bloom at Oakland, California, on 15 October 2011. Part of the Western History Association Oral History Project, Everett Cooley Collection tape no. U-3098Ms. Bloom talks about the history of and her involvement in the Western History Association (WHA), particularly the role and acceptance of women in the organization. She discusses the key people who were involved in the WHA and how their activities contribution to the development of the organization. She relates how her husband´s involvement in WHA leadership positions impacted her own involvement. Ms. Bloom notes changes in the WHA over the years and the impact of those changes on the association. Project: Western History Association. Interviewer: Greg Smoa
Bombaze
No full textCommissioned for the ‘NEoN’ Digital Art Festival, in Dundee, Nov 2012, and delivered via the festival website and iTunes app store as an interactive virtual art game. ‘Bombaze’, is a term first attributed to the writings of the great Scots Poet Allan Ramsay in the 17th Century and is the Scottish equivalent for the word ‘bamboozle’ as in ‘to perplex’, ‘to mystify’ and ‘to confuse’. Through gameplay ‘Bombaze’ becomes a creative tool for investigation into the virtues of ‘virtual’ art, engaging its audience with novel, quirky, 3D augmented interaction and offering users a platform from which to speak out on the ways public / augmented artwork can enrich an environment, and provide alternative models for engaging, social interaction.Gameplay entails following a route around some of Dundee’s more secret locations, on the look out for personalised image recognition game tags, once located the player enables the app through the use of their smart phone to view and interact with the 3D augmentation and engage with an updating database of geo-tagging preferences.Research for this output involved the implementation and experimentation of 3D augmentation programming and geo-tagged, locative technology. The testing and development of this was addressed through a period of collaboration and discussion with directors from Scottish Digital Games Design agencies ‘Once were farmers’ and ‘Small and the giants’. In this instance the two companies took over the development of the 3D implementation and programming as directed by Jaygo Bloom. Funded by a grant of £6.5K by the ‘Fleet Collective’ in association with Creative Scotland, ‘Bombaze’ coincided with the launch of ‘NEoN’ 2012, Its premise, to bring artwork out of the gallery and place it in public space, accessible to all and to act as an platform for discussion, engaging the local community and festival goers in discussions about the relevance of digitally mediated artworks within public space<br/
- …
