30 research outputs found
LoRa in the Field: Insights from Networking the Smart City Hamburg with RIOT
Inter-connected sensors and actuators have scaled down to small embedded
devices such as wearables, and at the same time meet a massive deployment at
the Internet edge: the Internet of Things (IoT). Many of these IoT devices run
on low-power batteries and are forced to operate on very constrained resources,
namely slow CPUs, tiny memories, and low-power radios. Establishing a network
infrastructure that is energy efficient, wireless, and still covers a wide area
is a larger challenge in this regime. LoRa is a low complexity long range radio
technology, which tries to meet these challenges.With LoRaWAN a network model
for widespread deployment has been established, which enjoys open public
LoRaWAN dissemination such as with the infrastructure of TheThingsNetwork. In
this paper, we report about our experiences with developing and deploying
LoRa-based smart city applications as part of the MONICA project in Hamburg.
Our contributions are twofold. First, we describe the design and implementation
of end-to-end IoT applications based on the friendly IoT operating system RIOT.
Second, we report on measurements and evaluations of our large field trials
during several public events in the city of Hamburg. Our results show that
LoRaWAN provides a suitable communication layer for a variety of Smart City
use-cases and IoT applications, but also identifies its limitations and
weaknesses.Comment: 6 pages, 10 figure
MONICA in Hamburg: Towards Large-Scale IoT Deployments in a Smart City
Modern cities and metropolitan areas all over the world face new management
challenges in the 21st century primarily due to increasing demands on living
standards by the urban population. These challenges range from climate change,
pollution, transportation, and citizen engagement, to urban planning, and
security threats. The primary goal of a Smart City is to counteract these
problems and mitigate their effects by means of modern ICT to improve urban
administration and infrastructure. Key ideas are to utilise network
communication to inter-connect public authorities; but also to deploy and
integrate numerous sensors and actuators throughout the city infrastructure -
which is also widely known as the Internet of Things (IoT). Thus, IoT
technologies will be an integral part and key enabler to achieve many
objectives of the Smart City vision.
The contributions of this paper are as follows. We first examine a number of
IoT platforms, technologies and network standards that can help to foster a
Smart City environment. Second, we introduce the EU project MONICA which aims
for demonstration of large-scale IoT deployments at public, inner-city events
and give an overview on its IoT platform architecture. And third, we provide a
case-study report on SmartCity activities by the City of Hamburg and provide
insights on recent (on-going) field tests of a vertically integrated,
end-to-end IoT sensor application.Comment: 6 page
A framework for nation-centric classification and observation of the internet
The Internet has matured to a mission-critical infrastructure, and recently attracted much attention at political and legal levels in many countries. Civil actions regarding the Internet infrastructure require a thorough understanding of the national components of the global Internet to foresee possible impacts of regulations and operations at a country-level. In this paper we report on a methodology, tool chain and results for identifying and classifying a 'national Internet'. We argue for the importance to consider individual IP-blocks and quantify the effects of our proposed approach. The methods have been applied to identify a 'German Internet', but are designed general enough to work for most countries, as well
Iris Liveness Detection Competition (LivDet-Iris) -- The 2020 Edition
Launched in 2013, LivDet-Iris is an international competition series open to
academia and industry with the aim to assess and report advances in iris
Presentation Attack Detection (PAD). This paper presents results from the
fourth competition of the series: LivDet-Iris 2020. This year's competition
introduced several novel elements: (a) incorporated new types of attacks
(samples displayed on a screen, cadaver eyes and prosthetic eyes), (b)
initiated LivDet-Iris as an on-going effort, with a testing protocol available
now to everyone via the Biometrics Evaluation and Testing
(BEAT)(https://www.idiap.ch/software/beat/) open-source platform to facilitate
reproducibility and benchmarking of new algorithms continuously, and (c)
performance comparison of the submitted entries with three baseline methods
(offered by the University of Notre Dame and Michigan State University), and
three open-source iris PAD methods available in the public domain. The best
performing entry to the competition reported a weighted average APCER of
59.10\% and a BPCER of 0.46\% over all five attack types. This paper serves as
the latest evaluation of iris PAD on a large spectrum of presentation attack
instruments.Comment: 9 pages, 3 figures, 3 tables, Accepted for presentation at
International Joint Conference on Biometrics (IJCB 2020
Cdc48/p97 and Shp1/p47 regulate autophagosome biogenesis in concert with ubiquitin-like Atg8
Cdc48/p97/VCP plays a ubiquitin-independent role during autophagosome formation in S. cerevisiae
LoRa in the Field: Insights from Networking the Smart City Hamburg with RIOT
Inter-connected sensors and actuators have scaled down to small embedded devices such as wearables, and at the same time meet a massive deployment at the Internet edge---the Internet of Things (IoT). Many of these IoT devices run on low-power batteries and are forced to operate on very constrained resources, namely slow CPUs, tiny memories, and low-power radios. Establishing a network infrastructure that is energy efficient, wireless, and still covers a wide area is a larger challenge in this regime. LoRa is a low complexity long range radio technology, which tries to meet these challenges. With LoRaWAN a network model for widespread deployment has been established, which enjoys open public LoRaWAN dissemination such as with the infrastructure of TheThingsNetwork. In this paper, we report about our experiences with developing and deploying LoRa-based smart city applications as part of the MONICA project in Hamburg. Our contributions are twofold. First, we describe the design and implementation of end-to-end IoT applications based on the friendly IoT operating system RIOT. Second, we report on measurements and evaluations of our large field trials during several public events in the city of Hamburg. Our results show that LoRaWAN provides a suitable communication layer for a variety of Smart City use-cases and IoT applications, but also identifies its limitations and weaknesses