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Identifying the most recent heavy hitters, i.e., finding the items with the highest appearances in a high speed data stream is a fundamental problem in real-time stream processing. The requirement of real-time stream applications raises significant challenges to this problem in terms of the processing latency, the space usage and the precision. Traditional schemes leverage the sliding windows based...
Some sleep disorders, such as sleep apnea, restless legs syndromes (RLS), and periodic limb movement disorder (PLMD), require a full-night sleep monitoring for diagnosis. Conventional sleep monitoring devices are disturbing and inconvenient for daily scene applications. In this poster paper, we propose a sleep monitoring system by embedding RFID tags into bed cloth and realize two main functions:...
Tracing current vs. voltage curve is an important part of the documentation of a Photovoltaic (PV) system to comply to the IEC 62446 standard. In order to get the high accuracy, the PV array would be subjected to an unspecified and large number of voltage perturbations often using specialized measuring instruments. In this paper, we explain how to minimize the tracing-time by performing a pre-defined...
Structural health monitoring plays an important role in protecting civil infrastructures. Smart film bionic monitoring method and video image monitoring method have advantages of high speed and perceptual intuition, so they have been well applied in structural health monitoring. However, the two methods are difficult in detecting structural stress condition and limited in some monitoring aspects....
The development of the Internet functions now affects many activities, talks, meetings, shopping, and learnings. E-Learning is part of the development models of learning that utilizes the internet. The current development model of online learning still needs support and new innovations. Politeknk Elektronika Negeri Surabaya (PENS) has an online learning application that uses the Moodle LMS. However,...
When a device on network communicates with copious other devices during a time window, this device is called a super point. Super points play important roles in network because they are usually servers, hosts running P2P applications, worms, DDos victims. Super points may change with the time. How to locating these super points from core network efficiently is a hard task. This paper proposed an algorithm...
Ground-based SAR has become an important remote sensing technology means for deformation monitoring in recent years. However, in order to achieve higher efficiency data acquisition and wider observation, arc antenna array technology is applied to ground-based SAR. In this paper, a polar format imaging algorithm for arc antenna array ground-based SAR is proposed. Firstly, a brief background on ground-based...
Practical technique of the analysis of scientific metaphors on the basis of multidimensional data of observation astrophysics, monitoring of medical institutions by interpretation of points multidimensional space of parameters of objects of monitoring are offered. By cognitive machine graphics these algorithms form cognitive images as scientific graphic metaphors in consciousness of the user. Efficiency...
Wireless sensor networks are emerging systems that can be used to monitor a variety of environments and communicate data to the relevant destination. This work scrutinizes the broadcast overhead problem in distributed sensor networks and propose a probabilistic structure (bloom filter) based technique, a new broadcast structure that attempts to reduce the number of duplicate copies of a packet at...
Cloud computing has transformed the accessibility and usage of information technology resources, by offering them as services via the Internet. Cloud service provisioning spans across infrastructure, platform and software levels. The management of the services at these levels is based on monitoring. The analysis of monitoring data provides insight into Cloud operations in order to make informed decisions...
An experiment to study the entropy method for an anomaly detection system has been performed. The study has been conducted using real data generated from the distributed sensor networks at the Intel Berkeley Research Laboratory. The experimental results were compared with the elliptical method and has been analyzed in two dimensional data sets acquired from temperature and humidity sensors across...
Six years have passed since the Deepwater Horizon oil spill. Work is still ongoing to assess and repair the economic and property damage caused by the accident, which was considered to be the largest accidental marine oil spill in the history of the petroleum industry. An estimated 4.9 million barrels of crude oil leaked into the sea over an 87-day period after the initial explosion.
Spin-Torque Transfer RAM (STTRAM) is a promising candidate for last level cache due to its high density, high endurance and low leakage. Although promising, STTRAM suffers from high write latency and write current. Additionally, the latency and current depends on the polarity of the data being written. These factors introduce security vulnerabilities and expose the cache memory to side channel attacks...
Memory access latency continues to be a dominant bottleneck in a large class of applications on modern architectures. To optimize memory performance, it is important to utilize the locality in the memory hierarchy. Structure splitting can significantly improve memory locality. However, pinpointing inefficient code and providing insightful guidance for structure splitting is challenging. Existing tools...
Ransomware is a growing threat that encrypts auser's files and holds the decryption key until a ransom ispaid by the victim. This type of malware is responsible fortens of millions of dollars in extortion annually. Worse still, developing new variants is trivial, facilitating the evasion of manyantivirus and intrusion detection systems. In this work, we presentCryptoDrop, an early-warning detection...
This paper analyses the performance of a rooftop photovoltaic (PV) plant installed on the city rooftops in south China and a desert PV plant in remote desert in northwest China. A subsystem of the rooftop PV plant and a subsystem of the desert PV plant were monitored by a data acquisition system. The results showed that the performance radio (PR) of the rooftop PV subsystem and the desert PV subsystem...
Monitoring utility-scale solar arrays was shown to minimize cost of maintenance and help optimize the performance of the array under various conditions. In this paper, we describe the design of an 18 kW experimental facility that consists of 104 panels fitted with smart monitoring devices. Each of these devices embeds sensors, wireless transceivers, and relays that enable continuous monitoring, fault...
Efficient parallel execution of scientific and transaction-oriented applications requires reducing communication/synchronization overheads by improving locality using explicit methods that capturet underlying access patterns. In this work, we propose low-cost hardware that supports load balancing and parallel broadcast/scatter macro-operations. We evaluate these primitives using a cycle-accurate SystemC...
An accurate and fast estimation of microseismic activities from passive microseismic data is a crucial issue to many oil and gas applications. Traditional methods are mainly based on manual picking of the arrival times which require a relative high signal-to-noise ratio (SNR) to produce reliable results. When the sensor array is deployed on the surface, the microseismic events have low magnitude and...
Micro-sensors are now integral part of many technologically advanced healthcare systems used in monitoring elderly people who have high risk of fall and other mobility problems. Some theories have been established that relate inconsistency in the gait phases of a person to the possibility of an imminent fall. Using these theories, a number of monitoring systems have been developed to detect and predict...
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