Why is packet loss such a killer? There are many reasons, most having to do with the nature of how TCP (Transmission Control Protocol) works, and especially how TCP does congestion control. Packet loss is a problem that can affect any given network, slowing transfers to a halt and making real time streams such as VoIP or video streams unusable. Packet loss is something that should be avoided wherever possible and is a symptom of network issues such as lack of capacity or failing devices.

2i2c makes interactive computing more accessible and powerful for research and education. The 2i2c team strives to accelerate research and discovery, and to empower education to be more accessible, intuitive, and enjoyable. They do this by providing managed services for interactive computing infrastructure for research and education, as well as by supporting open source tools and communities that underlie this infrastructure. For more information, see 2i2c.org.

Funding provided by Chan Zuckerberg Science Initiative

ICSI researchers have been working with DAC to identify and acquire datasets that are sufficient for training Automated Speech Recognition (ASR) models. They are researching and developing ASR models that are robust to noise, music, babble and reverberation. This may include, but is not limited to, the research and implementation of signal processing algorithms that remove segments of an audio stream that do not include speech.

Jay z free music download. Identifying potential WMD-related threats before they materialize requires the ability to discover and analyze low-observable WMD-related information from data of all types, including social media. To help build the robust natural language understanding (NLU) systems needed for this goal, this project investigates the automatic identification of semantic components, sub-lexical elements of linguistic meaning that may be composed in different ways to capture the meanings of words.

One of the greatest challenges to NLP is the increasing variety of languages on the internet; part of the answer to this challenge can come from the FrameNet lexical database, which has been developed for English since 1997 at the International Computer Science Institute (ICSI) based on the principles of Frame Semantics (Fillmore 1977; Fillmore 1985). The lexicon is organized by semantic frames, with valence information derived from attested, manually annotated corpus examples (Fillmore & Baker 2010).

The right vantage point is critical to the success of any active measurement. However, most research groups cannot afford to design, deploy, and maintain their own network of measurement endpoints, and thus rely measurement infrastructure shared by others. Unfortunately, the mechanism by which we share access to measurement endpoints today is not frictionless; indeed, issues of compatibility, trust, and a lack of incentives get in the way of efficiently sharing measurement infrastructure.

People generally center their lives around their residence. This center of gravity is where we can be contacted, store our things, do our homework, play games, meet after disparate activities, eat our meals, and so on. Our digital lives are, however, not organized around such a hub. Rather, we use a myriad of services to communicate with one another, store pictures, work on documents, share videos, keep our music, deal with calendars, etc. In this arrangement we are the hub. Our content and information comes to us from a range of places to wherever we happen to be at the moment.

ICSI researchers are working with researchers at Carnegie Mellon University on tracking private data through machine learning pipelines. They will develop stronger notions of proxy that account for why a classifier is using information by:

The overall goal of this project is to enable the Berkeley Data Analytics Stack (BDAS) to run efficiently on the Cray XC30 and Cray XC40 supercomputer platforms. BDAS has a rich set of capabilities and is of interest as a computational environment for very large-scale machine learning and data analysis applications. To extend the capabilities of BDAS, ICSI researchers will consider the performance of deterministic and randomized matrix algorithms for problems such as least-squares approximation and low-rank matrix approximation that underlie many common machine-learning algorithms.

A serious problem with many existing machine learning and data analysis tools in the complex networks area is that they are often very brittle and/or do not scale well to larger networks. As a consequence, analysts often develop intuition on small networks, with 10² or 10³ nodes, and then try to apply these methods on larger networks, with 10⁵ or 10⁷ or more nodes. Larger networks, however, often have very different static and dynamic properties than smaller networks.

Packet loss often occurs when transmitting over wireless links, due to interference, intermittent obstacles, routing changes as conditions vary, etc. As examples, interference and the resulting packet loss are major concerns as the Internet is extended using wireless mesh networks, 5G millimeter wave transmission is known to be prone to packet loss with even the slightest obstruction, and slight variations in atmospheric conditions cause packet loss in laser communications between ground stations and drones or satellites.

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Various forms of voice assistants—stand-alone devices or those built into smartphones—are becoming increasingly popular among consumers. Currently, these systems react when you directly speak to them using a specific wake-word, such as “Alexa,” “Siri,” “Ok Google.” However, with advancements in speech recognition, the next generation of voice assistants is expected to always listen to the acoustic environment and proactively provide services and recommendations based on human conversations or other audio signals, without being explicitly invoked.

We are happy to announce the availability of prototype software implementing low latency/high reliability video streaming based on RaptorQ. The prototype uses the ROUTE protocol, which in turn uses RaptorQ to provide protection against packet loss. ROUTE and RaptorQ are specified in A/331, “Signaling, Delivery, Synchronization, and Error Protection”, as part of the ATSC 3.0 standard for delivery of media and non-timed data.

ICSI's TCS team is working with Facebook to build and evaluate a system wide network channel management tool for a wireless mesh network. The aim of the collaboration is to increase wireless capacity, decrease interference between devices (self and external), and provide more automated and intelligent network channel management and planning.

Funding being provided by Facebook Connectivity.

ICSI's TCS team is working with Facebook to simulate, understand and enhance wireless mesh networks. The main goal of the effort is to build a high fidelity simulator for wireless mesh networks to understand the performance scaling of such networks and improve coverage, density, throughput. Potential enhancements include extending the reach and performance of wireless mesh networks i.e. to support more hops and/or provide superior internet connectivity, using technology which avoids deep changes to the network or wireless technology.

The RaptorQ erasure code (specified in IETF RFC 6330) enables reliable wireless communication systems, including high quality streaming and delivery of large data packages.
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Under the auspices of the International Computer Science Institute, the Codornices project aims to spur further adoption and deployment of RaptorQ by developing a high performance software implementation of RaptorQ and developing application software that supports different use cases and standards that leverage RaptorQ.

Traditional datacenters are built using servers, each of which tightly integrates a small amount of CPU, memory and storage onto a single motherboard. The slowdown of Moore's Law has led to surfacing of several fundamental limitations of such server-centric architectures (e.g, the memory-capacity wall making CPU-memory co-location unsustainable). As a result, a new computing paradigm is emerging --- a disaggregated datacenter architecture, where each resource type is built as a standalone 'blade' and a network fabric interconnects the resource blades within and across datacenter racks.

This project addresses a seemingly simple question: Is there a universal packet scheduling algorithm? More precisely, researchers are analyzing whether there is a single packet scheduling algorithm that, at a network-wide level, can perfectly match the results of any given scheduling algorithm. The question of universal packet scheduling is being investigated from both a theoretical and empirical perspective.

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ICSI is working with LBNL on refinements to Zeek (formerly known as Bro). The work includes troubleshooting and resolving the most complex problems with the Zeek network monitor, development/integration of the communication framework, development and implementation of new features for the Input framework, and development of a persistence solution for the NetControl and Catch-and Release frameworks of Zeek/Bro. Zeek/Bro is an open-source network intrustion detection system developed at ICSI and LBNL which is currently in use at Fortune 500 companies, universities, and governments.

ICSI is working with LLNL on ongoing work on feature extraction and analytic techniques that map raw data from multiple input modalities (e.g., video, images, text) into a joint semantic space. This requires cutting edge research in multiple modalities, as well as in the mathematical methods to learn the semantic mappings.

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In this collaborative project with University of Maryland, ICSI researchers are tackling the challenge of explaining what constitutes unacceptable algorithmic discrimination. Getting the answer to this question right is key to unlocking the potential of automated decision systems without eroding the ability of people to get a fair deal and advance in society.