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Null Convention Logic (NCL) is the one of the well-known clock-less approaches for designing asynchronous logic circuits. The complementary metal oxide semiconductor (CMOS) technology is usually used for implementing the NCL circuits, which as a major drawback of large area consumption and power dissipation. These limitations have been addressed by adopting a low-power design technique called Gate Diffusion Input (GDI) in this work. GDI technique allows implementing primitive logic gates using only two transistors. Thus, it not only reduces the transistor count but also the power consumption. However, GDI technique suffers a significant voltage drop across the circuit, due to its inherent voltage swings. Thus, to ensure full swing output regenerative buffers are added at the output stage which tends to increase the overall latency. In this work, a novel GDI and HYBRID (CMOS+GDI) designs are proposed to overcome the limitations of the CMOS-NCL designs. The proposed approaches were tested by realizing NCL Ripple Carry Adder (RCA). The proposed model was simulated in Cadence Virtuoso and power reduction of 14.9 % and 9.8 % has been observedfor GDI and HYBRID models, respectively.

Lately, stochastic computing (SC) has been found to be significantly advantageous in image processing applications because of its lower hardware complexity and power consumption. However, its viability is deemed to be limited due to excessive run-time requirement. In this paper, a new technique called the variable bit truncation approximate stochastic computing (ASC) approach focusing on image processing applications is proposed to reduce the computation time of a SC with an acceptable trade-off in accuracy. The proposed technique is to variably truncate the low-order bits of the image pixel value depending on the application and the accuracy limits. Experimental results on standard test images for multiple image processing applications suggest that by using this approach acceptable output images can be generated using stochastic computation at a much faster way.

This paper presents a low power and small area temperature sensor with interlaced hysteresis delay cells (IHDCs) instead of using inverter-based buffers. IHDC consumes lower power and occupies smaller silicon area than inverter-based buffers. A pulse width which is proportionate to temperature is produced by the proposed temperature-to-pulse generator. Two different delay lines and an XOR gate are employed to detect pulse width for temperature measurement. Temperature dependent and thermal insensitive delay lines are used as the two different delay lines. The output of the temperature-to-pulse generator is converted to digital output by a time-to-digital converter. This temperature sensor is simulated with 0.18um CMOS technology and 1.8V supply voltage, and it shows a good linearity with lower power consumption compared to conventional ones. The proposed temperature sensor consumes 1.185 mW.

The clothing materials are ubiquitous part of our everyday life for thousands of years. However, despite this they have largely not been considered as an input surface in human device interactions, but that is until more recently as today's developments of wearable sensors, that are small and flexible in nature, have open this platform. The clothing materials' shape-changing nature enables the users to perform gestures (e.g., bend or stretch) not possible when compared to the interaction methods of flat touchscreens of mobile devices. In addition, the clothing-based interfaces by default have the unique advantage of being placed anywhere on the body and always being with the wearers and their devices. In this paper, we validate the use of clothing-based wearable sensors to support interacting with mobile devices and present some challenges to be overcome for clothing-based interfaces to be adopted more widely.

Nowadays, robots take more charges of human activities, especially in repeated tasks, daily homecare and emergency rescue. Instead of using a solo robot to execute specific tasks, it calls for multi robots to cooperate in more scenarios, especially doing complex and difficult tasks that a single robot could not complete. In this paper, firstly it demonstrates a simplified model of the real disaster rescue scenario where requires robots to remove rocks from the road. Then it discusses the system how multi robots communicate wirelessly and cooperate together based on this abstract scenario. Finally, it evaluates and reflects the built system.