222,175 research outputs found
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
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
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
Increasing the power efficiency of Bloom filters for network string matching
No full textAlthough software based techniques are widely accepted in computer security systems, there is a growing interest to utilize hardware opportunities in order to compensate for the network bandwidth increases. Recently, hardware based virus protection systems have started to emerge. This type of hardware systems work by identifying the malicious content and removing it from the network streams. In principle, they make use of string matching. Bit by bit, they compare the virus signatures with the bit strings in the network. The bloom filters are ideal data structures for string matching. Nonetheless, they consume large power when many of them used in parallel to match different virus signatures. In this paper, we propose a new type of Bloom filter architecture which exploits well-known pipelining techniqu
The Gnostic Author of Harold Bloom
No full textČlanak isprva kontekstualizira pojavu tzv. authorship studies koje su nastale kao svojevrsna reakcija na poststrukturalističko (R. Barthes i M. Foucault) redefiniranje autorstva. U taj se kontekst zatim pozicionira Harold Bloom. On je, naime, iz uvjerenja da su poststrukturalističke antihumanističke tendencije pokrenule degenerativne procese, pa u konačnici i rastakanje književnosti u prvi plan svoje književne teorije postavio kanon i autora. Dok se o prvome znatno pisalo, drugo – pitanje autorstva – u studijama o Bloomu uglavnom je zanemareno. Stoga se u članku pozornost pridaje ponajprije Bloomovu tumačenju autora. Nastoji se pokazati da njegovo shvaćanje autorstva (kao, uostalom, i kanona) proizlazi iz gnostičke tradicije (Valentin i Lurija). Autor je za Blooma, zaključuje se, ponajprije genij – onaj koji stvara potaknut „iskrom“, pneumom, božanstvom u dnu vlastita uma, što je zapravo također stanoviti antihumanizam.The article contextualizes at first the occurrence of the so-called authorship studies that arose as a kind of reaction to the post-structuralist (R. Barthes and M. Foucault) redefinition
of authorship. Harold Bloom then positioned himself in this context. Namely, from the belief that post-structuralist anti-humanist tendencies initiated degenerative processes, and ultimately the disintegration of literature, he placed the canon and the author at the forefront of his literary theory. While much has been written about the first term, the second—the question of the authorship—has been mostly neglected in Bloom studies. Therefore, the article focuses primarily on Bloom’s interpretation of the author. The article tries to show that his understanding of authorship (as well as the canon, after all) derives from the Gnostic tradition (Valentin and Luria). For Bloom, the author is, it is concluded, primarily a genius—one who creates inspired by a “spark,” a pneuma, a divinity at the bottom of one’s own mind, which is actually also a certain form of anti-humanism
GuillaumeLeGland/DMOS-BLOOM: DMOS-BLOOM-v2
No full textThis release is the second version of the DMOS-BLOOM (Dynamic Model of Oceanic Sulfur production and consumption during phytoplankton blooms) model.
We submitted an article describing the first version of DMOS-BLOOM and its main results to Limnology and Oceanography in early November 2022. The second version was used for the manuscript revision submitted in May 2023.
Please contact Guillaume Le Gland ([email protected]) if you cannot download, run or understand the model
bcgsc/RNA-Bloom: RNA-Bloom v1.2.2
No full textgeneral changes
please update your ntCard to v1.2.1, which supports uracil and has other improvements and bugfixes
short reads assembly changes
changed Bloom filter architecture for paired k-mers
multi-threaded graph construction for transcript assembly
fixed out-of-bound error
nanopore reads assembly changes
adjusted read clustering algorithm
new options to adjust read clustering:
-hpc: use homopolymer-compressed minimizers
-m: minimizer size
-mw: minimizer window size
-sop: minimum proportion of sketch overlap minimizers
-son: minimum number of sketch overlap minimizers
reduced memory usage for assembly stag
Interview with Jonathan Bloom on The Minaret, by Jonathan Bloom
No full textTracing the origins and development of the Minaret, Professor Bloom reveals that this iconic element of Islamic architecture, long understood to have been invented in the early years of Islam as the place from which the muezzin gives the call to prayer, was actually invented some two centuries later to be a visible symbol of Islam. Drawing on buildings, archaeological reports, medieval histories, geographies and early Arabic poetry, Bloom reinterprets the origin, development and meanings of the Minaret. From early Islam to the modern world, and from Iran, Egypt, Turkey and India to West and East Africa, the Yemen and Southeast Asia, this richly illustrated book is a sweeping tour of the Minaret's position as the symbol of Islam.Title supplied by cataloger
- …
