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Marine ranching is a new concept of modern fishery, which has extremely significance to the development of modern ocean economy. Various technologies are required to ensure the efficiency of marine ranching. Among those, the technology of ocean resource assessment, especially fish resource, plays an indispensible and key role. This paper introduces an effective and precise method to assess the fishery...
Energy harvesting is one of the key technologies used to realize self-sustaining systems such as wireless sensor networks and health-care devices. Much research on circuit design has been conducted to extract as much energy as possible from transducers, such as the thermoelectric generator (TEG) and the piezoelectric transducer (PZT). Specifically, the energy in a PZT could be extracted more efficiently...
Many approaches have been proposed to develop self-adaptive software systems based on control engineering methods in recent years. However, these research works only evaluate the self-adaptive capabilities of the proposed control solution, but no evaluation is performed to quantify the costs of implementing such a control solution. This paper provides results of an empirical study, conducted to quantify...
Generally, social network contains a social structure between individuals who are connected by a set of social relationships, such as family, friendship, co-working and colleague etc. Our paper suggests an approach for visualizing the social network elements including users and relationships as well as the community that contains groups of users and contents. For this, we designed and implemented...
Compressed sensing is considered as a novel energy and bandwidth solution for wireless body area networks. In subthreshold operation, the conventional parallel structure is less energy-efficient than pipeline due to the low-frequency signals and the serious leakage energy. In this paper, we present a clockless pipeline compressed sensing encoder for highly energy-efficient purpose. Quasi-Delay-Insensitive...
This paper compares three low power schemes for the multi-hierarchy pipeline design of fixed point finite impulse response (FIR) digital filters, and we adopt an optimal CSD encoding method, minimizing the number of adders/subtractions in the design. In addition, a 16-bit, 16 taps low-pass FIR filter is designed to investigate the performance of the three different algorithms. To evaluate the performance...
Wireless body area network (WBAN) attracts significant interest nowadays. Because of its support of various QoS and communicate modes, when a SoC based on WBAN is developed, the first challenge we faced with is to test the high level algorithm in real environment and select proper values for system parameters. To solve the problem, this paper proposes a prototype for WBAN narrowband transmit-receive...
Fast Fourier transform (FFT) is one of the key operations in digital communication systems and digital signal processing platforms. This paper presents a design of high throughput variable-length FFT processor based on switch network (SN) architecture. Meanwhile, strong runtime configurability and scalability is exploited. Considering the support for variable-length FFT as well as the balance between...
Compressive sensing theory, which allows sparse signal to be sampled at sub-Nyquist rate, is introduced to Wireless Body Area Networks to reduce the hardware requirement and energy consumption of signal acquisition. However, signal recovery by software causes time delay for real-time reconstruction. In this paper, we propose a high speed hardware implementation of orthogonal matching pursuit reconstruction...
The fast Fourier transformation (FFT) is a key operation in digital signal processing (DSP) systems and has been studied intensively to improve the performance. Nowadays, embedded DSP systems require low energy consumption to prolong the life cycle, which raises stringent power limitation for FFT processing. Meanwhile, sufficient signal-to-quantization-noise ratio (SQNR) is a basic requirement in...
The IEEE 802.15.6–2012 standard optimized for short-range/low power purpose for WBAN applications has been approved recently. Based on the standard, this paper proposes the hardware implementation of the baseband transmitter for the first time. In our design, the physical layer (PHY) employs narrowband(NB) PHY in the standard and DPSK Modulator is optimized by employing CSD-coded (canonical signed...
The wireless access point (AP) devices of the next generation demand low-latency, high-security, and flexible authentication and authorization for heterogeneous clients. This makes it necessary to implement the high-complexity public-key ciphers efficiently on programmable processors. Therefore, this paper presents a quad-core processor that accelerates public-key computations by enabling high-speed...
The attacks such as Denial of Service (DoS) violate the security of Network-on-Chip (NoC) which emerges as a promising solution for multi-core system. In this paper, we explore the robustness of mesh-based NoC architecture under various flooding-based DoS attacks. Simulation results reveal that the robustness of NoC architecture can be correlated with parameters such as routing algorithm, the number...
Due to the rapid advancement of communication technologies, the ability to support access control to resources in open and dynamic environments is crucial. On the one hand, users demand access to resources and services in an anywhere, anytime fashion. On the other hand, additional challenges arise when ensuring privacy and security requirements of the stakeholders in dynamically changing environments...
Context-awareness and adaptability are highly desirable features for services that are operating in dynamic environments. Recently, a number of approaches have been introduced to support the development of such services. But, validating the varying requirements of these services is still a major challenge. In this paper, we introduce a novel scenario-based approach to address this challenge. First,...
Nanocomposites have been recognized to possess favorable dielectric and electrical insulation properties. However, poor dispersion of the nanofillers and weak filler-matrix bonding may significantly limit the performance of nanocomposites. The present study proposed using plasma polymerization method to coat poly(ethylene oxide)-like films on SiO2 nanoparticles in order to improve the dispersion and...
A single-instance multi-tenant (SIMT) SaaS application enables a SaaS provider to achieve economies of scale through runtime sharing. However, runtime sharing can make tenant-specific variations difficult to achieve in such an application. In this paper, we propose an approach to realizing SIMT SaaS applications, which is based on Dynamic Software Product Lines (DSPL) and supports runtime sharing...
There is an increasing demand for context-aware adaptive services that can evolve at runtime in response to unanticipated changes in their environments or functionalities. Enabling the runtime evolution of such context-aware adaptive services is still a major challenge. In this paper, we introduce a novel approach to tackle this challenge. At the development time, our approach explicitly models a...
Pairings are attractive and competitive cryptographic primitives for establishing various novel and powerful information security schemes. An efficient implementation of pairings is usually critical for realizing a cryptographic scheme practically. This paper presents a high-performance pairing processor with a new combined Montgomery multiplier which implements the fundamental operations of Fp2 multiplication...
Generally, social network contains a social structure between individuals who are connected by a set of social relationships, such as family, friendship, co-working and colleague etc. Our paper suggests an approach for visualizing the social network elements including users and relationships as well as the community that contains groups of users and contents. For this, we designed and implemented...
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