scholarly journals SCATTER PHY: An Open Source Physical Layer for the DARPA Spectrum Collaboration Challenge

2019 ◽  
Author(s):  
Felipe Augusto Pereira de Figueiredo ◽  
Dragoslav Stojadinovic ◽  
Prasanthi Maddala ◽  
Ruben Mennes ◽  
Irfan Jabandžic ◽  
...  
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Spectral Efficiency ◽  
Software Defined Radio ◽  
High Performance ◽  
The United States ◽  
Physical Layer ◽  
Research Projects ◽  
Physical Interfaces ◽  
Wireless Spectrum

DARPA, the Defense Advanced Research Projects Agency from the United States, has started the Spectrum Collaboration Challenge with the aim to encourage research and development of coexistence and collaboration techniques of heterogeneous networks in the same wireless spectrum bands. Team SCATTER has been participating in the challenge since its beginning, back in 2016. SCATTER’s open-source software-defined physical layer (SCATTER PHY) has been developed as a standalone application, with the ability to communicate with higher layers of SCATTER’s system via ZeroMQ, and uses USRP X310 software-defined radio devices to send and receive wireless signals. SCATTER PHY relies on USRP’s ability to schedule timed commands, uses both physical interfaces of the radio devices, utilizes the radio’s internal FPGA board to implement custom high-performance filtering blocks in order to increase its spectral efficiency as well as enable reliable usage of neighboring spectrum bands. This paper describes the design and main features of SCATTER PHY and showcases the experiments performed to verify the achieved benefits.

scholarly journals SCATTER PHY: An Open Source Physical Layer for the DARPA Spectrum Collaboration Challenge

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1343 ◽  
Author(s):  
Felipe A. P. de Figueiredo ◽  
Dragoslav Stojadinovic ◽  
Prasanthi Maddala ◽  
Ruben Mennes ◽  
Irfan Jabandžić ◽  
...  
Keyword(s):  
Research And Development ◽  
Open Source ◽  
Real Time ◽  
Software Defined Radio ◽  
Spectrum Sharing ◽  
The United States ◽  
Radio Spectrum ◽  
Physical Layer ◽  
Phy Layer ◽  
And Performance

DARPA, the Defense Advanced Research Projects Agency from the United States, has started the Spectrum Collaboration Challenge with the aim to encourage research and development of coexistence and collaboration techniques of heterogeneous networks in the same wireless spectrum bands. Team SCATTER has been participating in the challenge since its beginning, back in 2016. SCATTER’s open-source software defined physical layer (SCATTER PHY) has been developed as a standalone application, with the ability to communicate with higher layers through a set of well defined messages (created with Google’s Protocol buffers) and that exchanged over a ZeroMQ bus. This approach allows upper layers to access it remotely or locally and change all parameters in real time through the control messages. SCATTER PHY runs on top of USRP based software defined radio devices (i.e., devices from Ettus or National Instruments) to send and receive wireless signals. It is a highly optimized and real-time configurable SDR based PHY layer that can be used for the research and development of novel intelligent spectrum sharing schemes and algorithms. The main objective of making SCATTER PHY available to the research and development community is to provide a solution that can be used out of the box to devise disruptive algorithms and techniques to optimize the sub-optimal use of the radio spectrum that exists today. This way, researchers and developers can mainly focus their attention on the development of smarter (i.e., intelligent algorithms and techniques) spectrum sharing approaches. Therefore, in this paper, we describe the design and main features of SCATTER PHY and showcase several experiments performed to assess the effectiveness and performance of the proposed PHY layer.

Open source integrated library systems migration: Librarians share the lessons learnt

2017 ◽  
Vol 51 (2) ◽  
pp. 346-355 ◽  
Author(s):  
Vandana Singh
Keyword(s):  
United States ◽  
Open Source ◽  
Open Source Software ◽  
Research Team ◽  
The United States ◽  
Technical Support ◽  
Adaptation Process ◽  
Migration Process ◽  
Lessons Learnt

To better understand how libraries experience the process of migrating to open source software integrated library systems (OSS ILSs), nine librarians from libraries of multiple types and sizes were interviewed. All these libraries are in the United States and these librarians had participated in surveys and interviews about open source software integrated library systems with the research team in past years and at the time of the interview were at different stages of migration to open source software integrated library systems, from contemplating migration to completed migration. The librarians answered questions about their open source software integrated library systems on topics such as the migration process, technical support, adaptation process, and lessons and advice from the overall experience. The in-depth responses provide valuable insights on the process of migration to help libraries understand the challenges and benefits of open source software integrated library systems and are presented in this paper.

scholarly journals Securing the wireless emergency alerts system

2021 ◽  
Vol 64 (10) ◽  
pp. 85-93
Author(s):  
Jihoon Lee ◽  
Gyuhong Lee ◽  
Jinsung Lee ◽  
Youngbin Im ◽  
Max Hollingsworth ◽  
...  
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Defined Radio ◽  
Severe Weather ◽  
Base Stations ◽  
The Public ◽  
Software Libraries ◽  
Amber Alerts ◽  
Almost All ◽  
To Receive

Modern cell phones are required to receive and display alerts via the Wireless Emergency Alert (WEA) program, under the mandate of the Warning, Alert, and Response Act of 2006. These alerts include AMBER alerts, severe weather alerts, and (unblockable) Presidential Alerts, intended to inform the public of imminent threats. Recently, a test Presidential Alert was sent to all capable phones in the U.S., prompting concerns about how the underlying WEA protocol could be misused or attacked. In this paper, we investigate the details of this system and develop and demonstrate the first practical spoofing attack on Presidential Alerts, using commercially available hardware and modified open source software. Our attack can be performed using a commercially available software-defined radio, and our modifications to the open source software libraries. We find that with only four malicious portable base stations of a single Watt of transmit power each, almost all of a 50,000-seat stadium can be attacked with a 90% success rate. The real impact of such an attack would, of course, depend on the density of cellphones in range; fake alerts in crowded cities or stadiums could potentially result in cascades of panic. Fixing this problem will require a large collaborative effort between carriers, government stakeholders, and cellphone manufacturers. To seed this effort, we also propose three mitigation solutions to address this threat.

scholarly journals A BIBLIOMETRIC ANALYSIS OF THE USE OF OPEN SOURCE SOFTWARE IN EDUCATIONAL CONTEXTS

2020 ◽  
Vol 78 (1) ◽  
pp. 114-128 ◽  
Author(s):  
Orfa Nidia Patiño Toro ◽  
Yesenia Acevedo Correa ◽  
Alejandro Valencia-Arias ◽  
Martha Benjumea-Arias
Keyword(s):  
Open Source ◽  
Bibliometric Analysis ◽  
Open Source Software ◽  
The United States ◽  
Research Trends ◽  
Academic Environments ◽  
Software Adoption ◽  
Management Learning ◽  
Strong Trend ◽  
Adoption And Implementation

Open source software has now become a significant alternative in meeting different needs in business, government and academic environments, such as needs related to economics, management, learning and innovation, among others. The purpose of this research was to examine the research trends and evolution of the field of open source software adoption between 2001 and 2019. The methodology used involved bibliometric analysis of 289 documents obtained through a Scopus extracted search equation, generating indicators of quantity and quality and analyzing the emerging themes in said field of knowledge. The findings of the research include the existence of a strong trend towards research and dissemination regarding open source software, particularly in countries such as the United States, whose institutions and authors demonstrate high levels of productivity and dissemination. There was also evidence of an interest in reducing barriers and encouraging the adoption and implementation of the software in other sectors where its use is still lagging behind. The main conclusion of the research is that the research of open source software adoption focuses on the following topics: innovation, Linux, FLOSS, engineering requirements, risk management, open innovation, the public sector, social network analysis and total cost of ownership. Keywords: bibliometric analysis, information technology, open source software, research trends, technology adoption.

scholarly journals ProjectQ: an open source software framework for quantum computing

Quantum ◽  
2018 ◽  
Vol 2 ◽  
pp. 49 ◽  
Author(s):  
Damian S. Steiger ◽  
Thomas Häner ◽  
Matthias Troyer
Keyword(s):  
Quantum Computing ◽  
Open Source ◽  
Open Source Software ◽  
High Performance ◽  
Quantum Algorithms ◽  
Cloud Service ◽  
Domain Specific Language ◽  
Resource Estimation ◽  
Domain Specific ◽  
Compiler Framework

We introduce ProjectQ, an open source software effort for quantum computing. The first release features a compiler framework capable of targeting various types of hardware, a high-performance simulator with emulation capabilities, and compiler plug-ins for circuit drawing and resource estimation. We introduce our Python-embedded domain-specific language, present the features, and provide example implementations for quantum algorithms. The framework allows testing of quantum algorithms through simulation and enables running them on actual quantum hardware using a back-end connecting to the IBM Quantum Experience cloud service. Through extension mechanisms, users can provide back-ends to further quantum hardware, and scientists working on quantum compilation can provide plug-ins for additional compilation, optimization, gate synthesis, and layout strategies.

scholarly journals The chemfp project

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrew Dalke
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Similarity Search ◽  
High Performance ◽  
Business Models ◽  
Nearest Neighbor ◽  
Lessons Learned ◽  
Nearest Neighbor Search ◽  
Memory Bandwidth ◽  
Software Project

AbstractThe chemfp project has had four main goals: (1) promote the FPS format as a text-based exchange format for dense binary cheminformatics fingerprints, (2) develop a high-performance implementation of the BitBound algorithm that could be used as an effective baseline to benchmark new similarity search implementations, (3) experiment with funding a pure open source software project through commercial sales, and (4) publish the results and lessons learned as a guide for future implementors. The FPS format has had only minor success, though it did influence development of the FPB binary format, which is faster to load but more complex. Both are summarized. The chemfp benchmark and the no-cost/open source version of chemfp are proposed as a reference baseline to evaluate the effectiveness of other similarity search tools. They are used to evaluate the faster commercial version of chemfp, which can test 130 million 1024-bit fingerprint Tanimotos per second on a single core of a standard x86-64 server machine. When combined with the BitBound algorithm, a k = 1000 nearest-neighbor search of the 1.8 million 2048-bit Morgan fingerprints of ChEMBL 24 averages 27 ms/query. The same search of 970 million PubChem fingerprints averages 220 ms/query, making chemfp one of the fastest CPU-based similarity search implementations. Modern CPUs are fast enough that memory bandwidth and latency are now important factors. Single-threaded search uses most of the available memory bandwidth. Sorting the fingerprints by popcount improves memory coherency, which when combined with 4 OpenMP threads makes it possible to construct an N × N similarity matrix for 1 million fingerprints in about 30 min. These observations may affect the interpretation of previous publications which assumed that search was strongly CPU bound. The chemfp project funding came from selling a purely open-source software product. Several product business models were tried, but none proved sustainable. Some of the experiences are discussed, in order to contribute to the ongoing conversation on the role of open source software in cheminformatics.

Adopting Open-Source Software Applications in U.S. Higher Education: A Cross-Disciplinary Review of the Literature

2009 ◽  
Vol 79 (2) ◽  
pp. 682-701 ◽  
Author(s):  
Shahron Williams van Rooij
Keyword(s):  
Higher Education ◽  
Open Source ◽  
Open Source Software ◽  
The United States ◽  
Management Systems ◽  
Course Management Systems ◽  
Software Applications ◽  
Body Of Knowledge ◽  
Rigorous Research ◽  
Key Drivers

Higher Education institutions in the United States are considering Open Source software applications such as the Moodle and Sakai course management systems and the Kuali financial system to build integrated learning environments that serve both academic and administrative needs. Open Source is presumed to be more flexible and less costly than commercial software. This article reviews the literature from the fields of Software Engineering and Education to determine the state of the current body of knowledge around the key drivers of Open Source adoption. The author discusses gaps in the literature and identifies opportunities for more rigorous research to measure the effectiveness of Open Source software in creating a balance between sound pedagogy and business efficiencies.

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