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Battery management systems can measure the performance of batteries. Most significantly, they can estimate expected run time under certain discharge conditions. The calculation is defined as the average current coming from the battery multiplied by the time it takes to reach a safe cutoff point of the battery. These two variables, average discharge current and duration, are directly proportional to...
Localization and mobility monitoring are fundamental functions for constructing a smart living space. This paper presents a smart living platform based on motion sensing carpets. It is developed in the form of 50×50cm ‘puzzle floor mat’ units, which allows the users to assemble by themselves according to their desired shape and area. From the pressure data collected by motion sensing carpets, functions...
Monitoring the progress or deterioration of the elder's life activities is vital for a medical assistant or care helper to provide an early alert when an unusual activity may be happening in other days. In this study, we have considered a technique for monitoring and identifying abnormal behavior of health data collected from a smart home to help an elderly person to live safely in his/her home longer...
Image segmentation is an important technique in image processing. It be used for separating the objects or foreground from the background. This paper focuses on the split step of a split-and-merging approach for color image segmentation. For splitting, we propose a quad-tree method based on hue angles (QTHA). The QTHA introduces a novel metric criterion for measuring hue homogeneity within a block...
In this paper, the problem of queue in convenient stores is considered. We propose a low cost automatic queue length monitoring system by using an Internet-of-Things (IoT) platform. This system can detect the length of queue and the number of people that enqueue and leave the queue. If the length of queue is critical, the system will alert to staff via LINE Notify. Experimental results indicate that...
This paper introduces the proposal of a remote sensory system for the detection of sleep disorders in geriatric outpatients. Although the most accurate solution would be an in-depth study in a sleep clinic, it is not a realistic environment for the elderly. The objective is that the patient stays at home, and without changing their daily routines, the clinicians get objective information in order...
The separated control and data planes in software-defined networking (SDN) with high programmability introduce a more flexible way to manage and control network traffic. However, SDN will experience long packet delay and high packet loss rate when the communication link between two planes is jammed by SDN-aimed DoS attacks with massive table-miss packets. In this paper, we propose FloodDefender, an...
We propose AccountTrade, a set of accountable protocols, for big data trading among dishonest consumers. To secure the big data trading environment, our protocols achieve book-keeping ability and accountability against dishonest consumers who may misbehave throughout the dataset transactions. Specifically, we study the responsibilities of the consumers in the dataset trading and design AccountTrade...
We describe an end-to-end platform called SpecSense to support large scale spectrum monitoring. SpecSense crowdsources spectrum monitoring to low-cost, low-power commodity SDR/embedded platforms and provides necessary analytics support in a central spectrum server. In this work, we describe SpecSense and address specific challenges related to accurately estimate spectrum occupancy on demand with low...
Currently, the limitation of battery has become a serious obstacle for the development of Internet of things (IoTs). Therefore, a new network architecture, named as battery-free network, were proposed. In a typical battery-free network, the battery-free nodes are equipped with any battery and can only gain energy from the environment. Such network extremely expands the scope of the IoT applications,...
After a massive scale failure, the assessment of damages to communication networks requires local interventions and remote monitoring. While previous works on network recovery require complete knowledge of damage extent, we address the problem of damage assessment and critical service restoration in a joint manner. We propose a polynomial algorithm called Centrality based Damage Assessment and Recovery...
In today's always-connected world, we receive a large number of notifications on our mobile devices. These notifications cause interruptions, stress, and even impact users' lifestyle. To understand how users respond to notifications, we develop an application that monitors various features (e.g., importance) of the notifications, users' actions, and the level of users' engagement with the notifications...
Keeping students attentive during lectures may significantly improve learning outcomes. Traditional methods of attention estimation cannot offer a real-time feedback to the teacher. We present a technical concept of student attention monitoring during a lecture. The system utilizes a set of cameras providing tracking of the behavior of individual students in the classroom. The monitoring system is...
With the flexibility and programmability levels offered by Network Functions Virtualization (NFV), it is expected to catalyze the upcoming “softwarization” of the network through software implementation of networking functionalities on virtual machines (VMs). While looking into the different issues thrown at NFV, numerous works have demonstrated how performance, power consumption and, consequently,...
The increasing demand for smarter yet more efficient indoor spaces necessitates moving towards advanced technologies, such as Internet of Things architectures, to allow further integration to our physical world. In this work, we introduce a Bluetooth Low Energy-based infrastructure for location-aware buildings, along with a full-scale real-subject trial. The trial was undertaken with students in our...
Wireless devices such as sensors have increasingly more processing, storage, and networking capabilities, making wireless sensor networks (WSNs) get lots of attentions in recent years. In addition, the cost of sensors is constantly decreasing making it possible to use large quantities of these sensors in a wide variety of important applications in environmental, military, commercial, health care,...
Previous studies which explored the effects of typographic variables on Chinese text reading on small devices fixed the viewing distance from eyes to the screens. Hence, their results might not be generalized to the typographic design of Chinese texts on small devices. Therefore, the article tried to investigate the effects of Traditional Chinese character size and font style on reading performance...
This paper proposes a cargo management system, named i-Logistics, which consists of an electronic tape (e-tape), a QR code scan APP, an in-vehicle infotainment system (a vehicular telematics device), and a cloud-based platform. The dedicated Polyvinylidene fluoride (PVDF) sensors are mounted on the electronic tape for monitoring cargos. The QR code scan APP is used to burn a matching dedicated ID...
As the technologies of cloud computing grow and mature, software developers, software companies, and academia are more likely to develop, deploy, and operate their applications or services on cloud computing environments. By leveraging cloud computing environments, the complexity and the cost of physical hardware, operation, and related management tasks can be reduced. The capacities brought by cloud...
Building on the adoption of the Network Functions Virtualization (NFV) and Software Defined Networking (SDN) paradigms, 5G networks promise distinctive features including the capability to support multi-tenancy. Virtual Network Operators (VNOs) are expected to co-exist over the shared infrastructure, realizing their network functionality on top of virtualized resources. In this context, we observe...
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