| 1. |
- Sodergren, Erica, et al.
(författare)
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The genome of the sea urchin Strongylocentrotus purpuratus.
- 2006
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 314:5801, s. 941-52
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Tidskriftsartikel (refereegranskat)abstract
- We report the sequence and analysis of the 814-megabase genome of the sea urchin Strongylocentrotus purpuratus, a model for developmental and systems biology. The sequencing strategy combined whole-genome shotgun and bacterial artificial chromosome (BAC) sequences. This use of BAC clones, aided by a pooling strategy, overcame difficulties associated with high heterozygosity of the genome. The genome encodes about 23,300 genes, including many previously thought to be vertebrate innovations or known only outside the deuterostomes. This echinoderm genome provides an evolutionary outgroup for the chordates and yields insights into the evolution of deuterostomes.
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| 2. |
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| 3. |
- Gold, Richard, 1977-
(författare)
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An Indirection Architecture for the Internet
- 2005
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- We present an indirection architecture for the Internet called SelNet. SelNet provides a uniform indirection mechanism for controlling the route that packets take through the network and which functions are invoked to process these packets. In the current Internet, at least for the majority of users, there is only one way that a packet can go and that is to the default route. Whilst this is sufficient for many applications, numerous applications have arisen which require alternative routes or processing to be present not only at the application-layer of the protocol stack, but at the network-layer itself. Solutions to such scenarios attempt to place an indirection point between the communicating end-systems either with a middlebox (such as a proxy) or by altering one or more of the Internet's naming systems. However these approaches lead to an application-specific network, which is against the Internet's design goals. We argue for a uniform approach to indirection instead of building multiple, partially overlapping structures as is the current trend. SelNet differs from existing indirection approaches in that it is function-orientated, rather than node-orientated and that it provides an explicit, controllable resolution mechanism for resolving host names and services. The motivation behind our approach is to create efficient indirection structures for supporting new applications which have indirection requirements. We present a detailed design and specification of SelNet. We then go on to describe implementation work with the LUNAR ad-hoc routing protocol and the Janus middleware for accessing sensor networks systems. The purpose of this implementation work is to demonstrate the feasibility of SelNet and its ability to reach its goals.
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| 4. |
- Gold, Richard, et al.
(författare)
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Daigan: Constructing Proxy Networks with SelNet
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We present Daigan, a tool for constructing distributed proxy networks using the SelNet indirection layer. Using the indirection capabilities of SelNet, we can construct on-demand chains of proxies for adapting content for mobile devices. Daigan takes a specification of a device's capabilities and from that identifies which proxies are needed to meet these requirements. Based on this specification Daigan sets up a chain of proxies and transparently redirects an application's traffic to the proxy chain. We demonstrate Daigan's abilities through a scenario which performs the instantiation of a proxy chain consisting of a proxy cache, an image transcoder/compressor and a TCP header compression proxy. We describe this scenario in detail and report on implementation progress.
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| 5. |
- Nordström, Erik, et al.
(författare)
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Mythbusters : Whatever You Thought About MANET Routing, Think Again...
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Protocol and system designs suffer from myths that may affect their nature and purpose as well as their features and capabilities. We investigate the myths surrounding mobile ad hoc networks (MANETs) and the impact of these myths on the ability to build robust, efficient and simple routing protocols. We find that myths arise because of complexity and ambiguous design and lead to confusing protocol specifications, making the protocols difficult to understand and implement in running systems. For example, both AODV and DSR are confused about their nature as routing protocols and both blur the distinction between routing and forwarding. Building on experiences from implementing AODV and DSR, we dissect these protocols and try to dispel the myths surrounding them. From this dissection, we describe a new routing protocol called Partial Link State routing (PLS). PLS is a synthesis of routing concepts from AODV and DSR with a clearer design description and decoupling of routing and forwarding.
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