This article discusses the basics of passive RFID technologies, with an emphasis on tags, for general readers and entry- level practitioners. Following a brief history RFID, it describes types tags their operation, regulations frequency ranges. It then presents representative applications major technical hurdles still to be overcome before adoption can widespread, offers vision technology's future.

A two-stage power conditioning circuit consisting of an AC-DC converter followed by a DC-DC is proposed for vibration-based energy harvesting system. The intends to maximize the amount extracted from piezoelectric harvester matching source impedance with adaptively adjusting duty cycle. An equivalent electrical representation derived distributed-parameter model adapted enable method here. For given harvester, there theoretical maximum output that determined mechanical damping, base...

HOPE is an efficient parallel fault simulator for synchronous sequential circuits that employs the version of single propagation technique. based on earlier railed PROOFS, which several heuristics to efficiently drop faults and avoid simulation many inactive faults. In this paper, we propose three new techniques substantially speed up simulation: (1) reduction simulated in through mapping nonstem stem faults, (2) a injection method called functional injection, (3) combination static ordering...

A low-power energy harvesting system targeting to harvest several milliwatts from vibration is presented in this paper. Several design schemes reduce power dissipation of the proposed are described, and sources loss analyzed improve efficiency. discontinuous conduction mode (DCM) flyback converter with constant on-time modulation adopted for our system. The DCM operation a chosen as maximum point tracking (MPPT) be implemented single current sensor. lowers clock frequency controller by more...

Sleep deprivation attacks are a form of denial service attack whereby an attacker renders pervasive computing device inoperable by draining the battery more quickly than it would be drained under normal usage. We describe three main methods for to drain battery: (1) request power attacks, where repeated requests made victim services, typically over network - even if is not provided must expend energy deciding whether or honor request; (2) benign execute valid but energy-hungry task...

This paper presents a piezoelectric energy harvesting circuit, which integrates Synchronized Switch Harvesting on Inductor (SSHI) circuit and an active rectifier. The major design challenge of the SSHI method is flipping capacitor voltage at optimal times. proposed inserts diode each resonant loop, ensures times eliminates need to tune switching time. diodes are also used as rectifier further simplify controller. key advantage simple controller, leads low power dissipation result in high...

This paper investigates a ranging method employing ultra wideband (UWB) pulses under the existence of line sight (LOS) path in multipath environment. Our is based on estimation time arrival first multipath. It averages received over multiple frames, performs correlation operation averaged signal, and detects peak correlated signal. reduces accuracy conventional methods, its close to Cramer-Rao lower bound (CRLB) even for low SNR.

In this paper, we present a fast fault simulator, FSIM, for combinational circuits. FSIM is based on the parallel pattern single propagation (PPSFP) technique. The essential idea of to simulate circuit in forward levelized order and prune off unnecessary gates early stages. way, performs simulations only which are affected by 'the injected faults. Another key feature employed use multiple last-in first-out (L,IFO) stacks instead commonly used priority queue [9]. time mult,iple LIFO O(n) that...

Abstract Highly stretchable fiber sensors have attracted significant interest recently due to their applications in wearable electronics, human–machine interfaces, and biomedical implantable devices. Here, a scalable approach for fabricating multifunctional electrical optical using thermal drawing process is reported. The can sustain at least 580% strain up 750% with helix structure. sensor simultaneously exhibits ultrahigh stretchability (400%), high gauge factors (≈1960), excellent...

Mobile computers are subject to a unique form of denial service attack known as battery exhaustion attack, in which an attacker attempts rapidly drain the device. In this paper we present our first steps design intrusion detection system for these attacks, that takes into account performance, energy, and memory constraints mobile computing devices. This uses several parameters, such CPU load disk accesses, estimate power consumption using linear regression model, allowing us find energy used...

This paper presents the design of a wearable energy harvesting jacket, which harvests from solar and body heat in outdoor environment. The system consists 16 photovoltaic (PV) cells, 12 thermoelectric generators (TEGs), five power management chips, it charges two AAA NiMH batteries series. PV cells are partitioned into four zones (chest, back, right left shoulders), where same zone roughly subject to irradiation level. All controlled operate at nearly maximum point. Six TEGs connected series...

This brief presents an ultra low power IC design for piezoelectric (PE) energy harvesting, which integrates a maximum point tracking (MPPT) circuit and synchronized switch harvesting on inductor (SSHI) circuit. The proposed also has three different operation modes to extend the range of harvestable level generated by PE transducer. is designed in CMOS fabricated BiCMOS 0.25 μm technology with die size 2 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The authors present an efficient sequential circuit parallel fault simulator, HOPE, which simulates 32 faults at a time. HOPE is simulator based on single propagation. It adopts the zero gate delay model. key idea incorporated in to screen out with short propagation paths, and prevent them from being simulated parallel. screening process drastically reduces number of achieve substantial speedup. experimental results presented show that about two times faster than PROOFS for most ISCAS89...

HOPE is an efficient parallel fault simulator for synchronous sequential circuits that employs the version of single propagation technique. based on earlier railed PROOFS, which several heuristics to efficiently drop faults and avoid simulation many inactive faults. In this paper, we propose three new techniques substantially speed up simulation: (1) reduction simulated in through mapping nonstem stem faults, (2) a injection method called functional injection, (3) combination static ordering...

In this paper, we investigate a new generalized selection combining (GSC) technique and an adaptive low-power rake scheme to save the power consumption of mobile receivers for wideband CDMA systems. The GSC called minimum (MS-GSC) selects number fingers as long combined SNR is larger than given threshold. proposed adaptively adjusts threshold value maintain desired BER, in which dynamically meet condition. MS-GSC shows low standard deviation bit error statistics advantages practical...

Signature registers are commonly used to collect test responses in built-in self-testing (BIST). If the contents of signature can be as patterns, overall testing time reduced due improved parallelism. Moreover, number extra for implementing BIST could reduced. Here, characteristics patterns generated by studied through analyses well experiments. It is shown that rarely repeated when relatively small compared possible patterns. also almost uniformly distributed. Therefore, effectively...

Piezoelectricity is an ability of some materials to generate electric potential in response applied mechanical stress. Piezoelectric ceramics are often used for sensory systems monitor characteristics structures through electrical signal. Thus, support system level analysis and evaluation systems, understanding estimating the behavior piezoelectric with a minimum effort valuable. This paper proposes equivalent circuit model ceramics, PZT patch as specimen. The proposed approximates up 100%...

This paper presents a self-powered rectifier for piezoelectric energy harvesting applications, and the key idea of proposed system is to reset transducer capacitor at optimal instants maximize extracted power. The consists two switches active diodes. discharge times every cycle. diodes are based on op-amps with preset dc offset, which reduces voltage drop leakage current avoids instability. In addition, controller simple reduce circuit complexity power dissipation. was designed fabricated in...

This paper proposes alternating resistive impedance matching for an impact-type microwind piezoelectric energy harvester (PEH). The proposed PEH is composed of a cantilever and small wind turbine, which strikes the free end to generate vibrations. motion divided into two action periods, impact vibration, whose optimal loads are different. period detector, in collaboration with wake-up circuit, identifies current sets frequency duty cycle oscillator provide load each period. When generates...

본 연구는 중국어 主谓谓语句와 한국어 이중주어문의 대조연구를 통해 제2외국어로서의 교육에서의 효과적인 교수 방안을 모색하였다. 학습자들의 실제 번역 양상을 통계적으로 분석하여 두 언어 간의 유형론적 차이와 정보구조적 특성을 파악하고, 이를 바탕으로 실증적인 교육 제시하였다. 연구 결과는 교착어와 고립어라는 언어의 구조적 차이가 선호도에 유의미한 영향을 미치며, 이러한 차이를 체계적으로 교육하는 것이 제2외국어 교육의 핵심임을 보여준다.

In this paper we discuss the design of a CMOS based pulse generator for impulse-based UWB systems. The basic structure our involves power amplifier with four control taps, which essentially decides shape generated pulse. is versatile and may be used in variety modulation schemes addition, can also incorporated into multiband approach as rectified cosine generator.

This paper presents development of a self-powered power management circuit for energy harvested by piezoelectric cantilever. A full-wave rectifier followed buck-boost converter running in the discontinuous conduction mode rectifies AC output, matches source impedance, and generates regulated DC output provided input is sufficient to charge up load. low microcontroller unit used maximum point tracking voltage regulation. Experimental results show that can harvest 3.5 mW with 50 × 31.8 mm <sup...

<?Pub Dtl=""?> This paper presents a highly linear wideband differential low-noise amplifier (LNA) for digital TV applications. The proposed LNA is modified version of the reported by Bruccoleri <etal xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"/> in 2004. In order to increase linearity 's LNA, Volterra series adopted identify nonlinear components and noise-cancelling circuit eliminate whole components. Implemented 0.13- <formula...