| 1. |
- Jayasuriya, Namal, et al.
(författare)
-
Resource-Efficient Detection of Elephant Rumbles
- 2017
-
Ingår i: SenSys '17 Proceedings of the 15th ACM Conference on Embedded Network Sensor Systems. - New York, NY, USA : ACM.
-
Konferensbidrag (refereegranskat)abstract
- The human-elephant conflict is causing significant damages to the life of human and elephants in Sri Lanka. Minimizing encounters between humans and elephants is hence crucial in alleviating the human-elephant conflict. We have earlier introduced Eloc, a cost-effective localization system that is based on infrasonic emissions from wild elephants. One of the remaining challenges is a resource-efficient method to detect the elephants' infrasonic emissions. We present our efforts on devising a support vector machine (SVM) that is able to detect elephant rumbles on Eloc nodes.
|
|
| 2. |
- Elvitigala, Charitha, et al.
(författare)
-
Towards a sensor system to tame the human elephant conflict
- 2015
-
Ingår i: Sensors Applications Symposium (SAS). - IEEE. - 9781479961177 ; , s. 169-172
-
Konferensbidrag (refereegranskat)abstract
- The human elephant conflict in Sri Lanka has been a cause of major concern over the past decade. Frequent clashes between wild elephants and villagers have resulted in severe damage to property, as well as loss of lives for both humans and elephants. Competition for space is the primary reason for conflict between humans and elephants. Elephants that escape from the wildlife national parks venture into villages creating destruction in their wake. To prevent such mishaps, a proper system is required to contain and monitor elephants in national parks. In this paper, we describe different approaches to detect elephants and possible ways of monitoring the national wildlife parks. We also elaborate on the advantages and limitations of each approach, and determine what sort of system is needed to tame the human elephant conflict.
|
|
| 3. |
- Hamza, Mohammed Ayyoob Ahamed, et al.
(författare)
-
A Quadcopter Controller to Maintain Radio Link Quality
- 2015. - 8
-
Ingår i: Proceedings of the First Workshop on Micro Aerial Vehicle Networks, Systems, and Applications for Civilian Use (DroNet '15). - New York, NY, USA : ACM. - 9781450335010 ; , s. 21-26
-
Konferensbidrag (refereegranskat)abstract
- The excellent maneuverability and the availability of a large number of sensors including good quality video cameras make quadcopters attractive for surveillance systems. Most video surveillance systems need a real-time high quality video stream from the cameras on the quadcopter to the base station which requires a stable and reliable radio link. Moreover, to ensure a controlled flight, it is essential to maintain a good quality radio link from the base station to the quadcopter. The quality of this link depends on the distance between base station and quadcopter as well as the ambient noise. Towards this end, we present a controller to hover a quadcopter at the maximum distance from the base station while maintaining the link quality at a given value indicated by the Signal to Noise Ratio (SNR). There are existing solutions in the field of robotics that incorporate the concept of link aware mobility. However, to the best of our knowledge, this is the first link-quality aware mobility implementation on a quadcopter.
|
|
| 4. |
- Poshitha, Dabare, et al.
(författare)
-
Listening to the Giants : Using Elephant Infra-Sound to Solve the Human-Elephant Conflict
- 2015. - 10
-
Ingår i: Proceedings of the 6th ACM Workshop on Real World Wireless Sensor Networks (RealWSN '15). - New York, NY, USA : ACM. - 9781450338400 ; , s. 23-26
-
Konferensbidrag (refereegranskat)abstract
- The continuing human-elephant conict in Sri Lanka has resulted in loss of human as well as elephant lives. Detecting and localizing elephants is an essential component of any viable solution to this problem. Currently, we conduct feasibility tests on using low cost sensors to detect elephants from a long distance, leveraging the infra-sounds emitted by them. In this paper we present the test environment that we have set up for this purpose and some preliminary, but promising results.
|
|
| 5. |
- Sayakkara, Asanka, et al.
(författare)
-
Eloc : Locating wild elephants using low-cost infrasonic detectors
- 2018
-
Ingår i: Proceedings - 2017 13th International Conference on Distributed Computing in Sensor Systems, DCOSS 2017. - : IEEE. - 9781538639917 ; , s. 44-52
-
Konferensbidrag (refereegranskat)abstract
- A significant number of human and elephant lives have been lost due to the human-elephant conflict in Sri Lanka. To save lives of humans and elephants, it is therefore important to minimize encounters between them. In this paper, we present Eloc, a system that detects the presence of elephants using their infrasonic emissions near human habitats and then localize their positions. The high cost of infrasonic detectors is an important challenge to the real-world deployment of such localization systems, in particular in developing countries where the human-elephant conflict occurs. In order to address this problem, we design a low cost infrasonic detector that can be easily built using commodity off-the-shelf hardware. We present promising results in localizing an artificial infrasonic source and real-world experiments that suggest that we can localize free ranging elephants in the wild using this low cost infrasonic detector with an accuracy of around 10 m at distances of several hundred meters.
|
|
| 6. |
|
|
| 7. |
- Tennakoon, Eranda, et al.
(författare)
-
Sensor-based Breakage Detection for Electric Fences
- 2015
-
Ingår i: Sensors Applications Symposium (SAS). - IEEE. - 9781479961177 ; , s. 137-140
-
Konferensbidrag (refereegranskat)abstract
- The human-elephant conflict is one of the most severe natural problems in Sri Lanka. There are rich farmlands near the elephant habitats and elephants raid these farms in search of food. This has been the main cause for nearly 70 human deaths and over 200 elephant deaths that have been recorded each year in the recent past. To manage the problem, the government has initiated projects that secure the national wildlife parks with electric fences. However, maintaining the electric fence is a challenge, because of its large perimeter and the lack of available manpower. A particular concern is that of locating faults in electric fences since these typically span a few hundred miles. Currently, park rangers are required to travel on foot to locate the faults, which could take days to complete. In this paper, we propose a novel system architecture that considerably shortens the maintenance time for electric fences, at minimal and hence affordable cost. Our architecture benefits the park rangers of the national wildlife sanctuaries to detect and repair the breakages.
|
|
| 8. |
- He, Zhitao, et al.
(författare)
-
Arpeggio : a Penetration Attack on Glossy Networks
- 2016. - 9
-
Ingår i: 2016 13th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON). - : IEEE. - 9781509017324
-
Konferensbidrag (refereegranskat)abstract
- Glossy networks make use of concurrent transmissions to achieve rapid network flooding in wireless networks with high reliability. They are robust against jamming and header injection attacks. We find that Glossy floods can be hijacked by a packet injection attacker to penetrate into the network and cause severe loss. We demonstrate the design of such an attacker by evaluating its effectiveness in a 30-node testbed.
|
|
| 9. |
- Hewage, Kasun, et al.
(författare)
-
An Experimental Study of Attacks on the Availability of Glossy
- 2014. - 7
-
Ingår i: Computers & electrical engineering. - : Elsevier. - 0045-7906 .- 1879-0755. ; , s. 115-125
-
Tidskriftsartikel (refereegranskat)abstract
- Glossy is a reliable and low latency flooding mechanism designed primarily for distributed communication in wireless sensor networks (WSN). Glossy achieves its superior performance over tree-based wireless sensor networks by exploiting identical concurrent transmissions. WSNs are subject to wireless attacks aimed to disrupt the legitimate network operations. Real-world deployments require security and the current Glossy implementation has no built-in security mechanisms. In this paper, we explore the effectiveness of several attacks that attempt to break constructive interference in Glossy. Our results show that Glossy is quite robust to approaches where attackers do not respect the timing constraints necessary to create constructive interference. Changing the packet content, however, has a severe effect on the packet reception rate that is even more detrimental than other physical layer denial-of-service attacks such as jamming. We also discuss potential countermeasures to address these security threats and vulnerabilities.
|
|
| 10. |
- Hewage, Kasun, et al.
(författare)
-
Enabling TCP in Mobile Cyber-physical Systems
- 2015. - 7
-
Ingår i: 2015 IEEE 12th International Conference on Mobile Ad Hoc and Sensor Systems. - : IEEE Computer Society. - 9781467391016 ; , s. 289-297
-
Konferensbidrag (refereegranskat)abstract
- Cyber-physical systems consist of several wirelessly connected components such as sensors that monitor physical phenomena, computational entities that make decisions based on sensed information and actuators that interact with physical processes. Connecting cyber-physical systems to the Internet using IP protocols increases interoperability by avoiding the need for protocol translation gateways. Unfortunately, in this context TCP has been disregarded since it is known to perform poorly in wireless scenarios as it treats packet loss as an indicator for network congestion rather than poor link quality. In this paper, we use the Low-power Wireless Bus (LWB) as a link layer for TCP/IP, taking advantage of its reliability and its routing-free communication. We design a system that integrates LWB with a low-power IP stack and includes TCP-aware schedulers for LWB. We evaluate our system with experiments on real hardware using uIP, a popular embedded Internet protocol stack. Our results demonstrate high TCP throughput in mobile and static scenarios and, furthermore, show that mobility does not decrease TCP performance.
|
|
