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Liang P.-C.,University of Surrey | Liang P.-C.,National Communications Commission | Krause P.,University of Surrey
IEEE Journal of Biomedical and Health Informatics | Year: 2016

Monitoring the activities of daily living of the elderly at home is widely recognized as useful for the detection of new or deteriorating health conditions. However, the accuracy of existing indoor location tracking systems remains unsatisfactory. The aim of this study was, therefore, to develop a localization system that can identify a patient's real-time location in a home environment with maximum estimation error of 2 m at a 95% confidence level. A proof-of-concept system based on a sensor fusion approach was built with considerations for lower cost, reduced intrusiveness, and higher mobility, deployability, and portability. This involved the development of both a step detector using the accelerometer and compass of an iPhone 5, and a radio-based localization subsystem using a Kalman filter and received signal strength indication to tackle issues that had been identified as limiting accuracy. The results of our experiments were promising with an average estimation error of 0.47 m. We are confident that with the proposed future work, our design can be adapted to a home-like environment with a more robust localization solution. © 2015 IEEE.


Chang F.-C.,National Taiwan Normal University | Chung C.-H.,National Communications Commission | Hu T.-W.,University of California at Berkeley
Journal of Health Communication | Year: 2011

This study evaluated the effect of Taiwan's smoke-free ordinance and media campaigns on public awareness and secondhand smoke exposure. The authors conducted 3 waves of researchin July 2008 (before media campaigns), in December 2008 (during media campaigns), and in March 2009 (3 months after implementation of the smoke-free law). National representative samples of 1074, 1084, and 1094 people, respectively, were interviewed successfully by telephone in the 3 surveys. The results showed that general awareness of smoke-free workplace legislation rose dramatically from 28.5% in July 2008 to 87.6% in December 2008 to 93.6% in March 2009. Exposure to secondhand smoke in the workplace fell from 28.5% in July 2008 to 24.9% in December 2008 to 7.3% in March 2009, and household secondhand smoke exposure decreased from 36.8% to 34.3% to 21.3%, respectively, during the same period. Multivariate analyses results indicated that media campaigns, smoke-free ordinance implementation, having higher education, and having higher income were associated with more awareness of the smoke-free workplace legislation. In addition, smoke-free ordinance implementation, being female, having higher education, and having higher income were associated with less likelihood of reporting secondhand smoke exposure in the workplace. In conclusion, smoke-free ordinance implementation and media campaigns were effective in raising public awareness of the new law and reducing secondhand smoke exposure in workplaces, in public places, and at home. Copyright © Taylor & Francis Group, LLC.


Huang J.-F.,National Taiwan University of Science and Technology | Hsu C.-M.,National Taiwan University of Science and Technology | Chen K.-L.,National Communications Commission | Liu R.-Y.,Chung Hwa Telecommunication Inc.
Microwave and Optical Technology Letters | Year: 2013

A 21.68 GHz low-power frequency synthesizer with a LC-tank voltage-controlled oscillator (VCO) is implemented in TSMC 90 nm CMOS process.In this proposed circuit, there are three important features. The primary advantage of this circuit is the use of an all-NMOS cross-coupled Colpitts VCO, which decreases transistor parasitic capacitances and reduces phase noise. Second, an injection-locked frequency divider (ILFD) is utilized in the first divider stage to divide the high frequency signal. Third, a low supply voltage of 1.2 V is used to reduce power consumption. Measured results achieve that the locked output frequency is tunable from 21.54-21.96 GHz and the phase noise is about -97.47 dBc/Hz at 1 MHz offset from 21.68 GHz. The mixed output power spectrum at ILFD output frequency of 10.22 GHz is -2.97 dBm and the overall power consumption is 9.24 mW. Including pads, the chip area is 0.8 (0.8 × 1.0) mm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:200-205, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27229 Copyright © 2012 Wiley Periodicals, Inc.


Huang J.-F.,National Taiwan University of Science and Technology | Yang J.-L.,National Taiwan University of Science and Technology | Chen K.-L.,National Communications Commission
Lecture Notes in Electrical Engineering | Year: 2014

A 5.8-GHz frequency synthesizer is implemented in TSMC 0.18-μm CMOS process. This paper proposes a dynamic current-matching charge pump linearization technique and uses a current-switching differential Colpitts VCO to lower the phase noise and an averaged varactor circuit to increase the linearity of the VCO tuning range. At the supply voltage of 1.8 V, measured results achieve the locked tuning frequency from 5.55 to 5.94 GHz, corresponding to 6.8 % and the phase noise of -105.83 dBc/Hz at 1 MHz offset frequency from 5.8 GHz. The overall power consumption is 21.6 mW. Including pads, the chip area is 0.729 (0.961 × 0.761) mm2. © 2014 Springer International Publishing Switzerland.


Huang J.-F.,National Taiwan University of Science and Technology | Wen J.-Y.,National Communications Commission | Chen W.-C.,National Taiwan University of Science and Technology
Lecture Notes in Electrical Engineering | Year: 2015

A continuous-time low-pass sigma-delta modulator (ΣΔM) with a chain of integrators with weighted capacitive feedforward (CICFF) summation topology is fabricated by TSMC 0.18-μm CMOS process. The summation of feedforward signals is implemented by the weighted capacitors without the necessity of any additional active components. The quantizer uses a 1-bit comparator which may achieve high linearity easily. Under 1.8-V supply voltage, the measured results achieve a dynamic range of 52 dB over a 5-MHz signal bandwidth, a peak SNDR of 53.37 dB, an ENOB of 8.53 bits, an IM3 of –56 dB, and a power dissipation of 11.8 mW. With the pads included, the chip area is 0.35 (0.563 × 0.636) mm2. © Springer International Publishing Switzerland 2015.


Huang J.-F.,National Taiwan University of Science and Technology | Wei T.-H.,National Taiwan University of Science and Technology | Chen K.-L.,National Communications Commission
Microwave and Optical Technology Letters | Year: 2013

A fully integrated CMOS Hartley voltage controlled oscillator (VCO) applying in 5.6 GHz wireless receiver communication is successfully implemented by TSMC 0.18-μm CMOS process.To reduce the phase noise, the proposed VCO adopts the tapped-inductor technique, differential architecture, and symmetrical layout. No more integrated inductors are used for the buffer design to avoid magnetic coupling into the VCO core. At the supply voltage of 1.3 V, measured results achieve a tuning range of 5.38 to 5.55 GHz with a tuned voltage of 0 to 1.3 V, a phase noise of -115.4 dBc/Hz at 1 MHz frequency offset from the carrier frequency of 5.55 GHz and an output power of -6.3 dBm at 5.55 GHz. The power dissipation of the VCO is 3.77 mW and the chip area, including pads, is 0.51 (0.55 × 0.93) mm2. © 2013 Wiley Periodicals, Inc.


Huang J.-F.,National Taiwan University of Science and Technology | Wen J.-Y.,National Communications Commission | Lai W.-C.,National Taiwan University of Science and Technology
Microwave and Optical Technology Letters | Year: 2013

In this article, we use pattern-diversity technique to combine a RF single-pole double-throw (SPDT) switch with an antenna array together in order to reduce the signal distortion caused by multipath fading. In addition, in order to improve the way controlling the SPDT switch by software, a novel circuit structure which will control antenna pattern switching automatically by hardware is also developed. Return loss and radiation patterns are presented and compared with the measured results. Good agreement is achieved between computed and measured results and illustrates the validity of the designed method. Copyright © 2013 Wiley Periodicals, Inc.


Chang F.-C.,National Taiwan Normal University | Chung C.-H.,National Communications Commission | Yu P.-T.,Bureau of Health Promotion | Chao K.-Y.,Bureau of Health Promotion
Health Education Research | Year: 2011

The present study evaluated the impact of Taiwan's graphic cigarette warning labels and smoke-free law on awareness of the health hazards of smoking and thoughts of quitting smoking. National representative samples of 1074 and 1094 people, respectively, were conducted successfully by telephone in July 2008 (pre-law) and March 2009 (post-law). Results reveal that the prevalence of thinking about the health hazards of smoking among smokers increased from 50.6% pre-law to 79.6% post-law, while the prevalence among non-smokers increased from 68.8 to 94.1% during the same period. The prevalence rates of smokers who reported thinking of quitting rose from 30.2% pre-law to 51.7% post-law. Multivariate analyses results indicated that the implementation of graphic warning labels and the smoke-free law significantly increased the odds of awareness about the health hazards of smoking [odds ratio (OR) = 6.39, 95% confidence interval (CI) = 4.84-8.44] and thoughts of quitting smoking (OR = 2.39, 95% CI = 1.48-3.87). In conclusion, the implementation of a smoke-free law in combination with graphic cigarette warning labels has been effective in increasing thoughts about the health hazards of smoking and quitting smoking. © The Author 2010.


Lin M.-S.,National Chengchi University | Lin M.-S.,National Communications Commission | Wu F.-S.,National Chengchi University
Telecommunications Policy | Year: 2013

Governments worldwide actively promote broadband development, owing to its positive impact on economic growth. Although many studies have identified the determinants of broadband adoption, this study re-examines the determinants by applying Arellano-Bond GMM dynamic panel data estimation with more complete panel data for OECD countries. The estimation can not only closely capture the dynamics of broadband diffusion but also solve an endogeneity problem existing in the estimations of previous studies. The estimation results indicate that content is also a significant factor, in addition to previous broadband penetration and platform competition, as commonly identified in previous studies. This study further examines and compares determinants in different stages segmented by adopter categories proposed by Rogers. The results reveal different determinants in different stages. The key determinants are income, education, and content in the innovator and early adopter stage; platform competition and previous broadband penetration in the early majority stage; and broadband price in the late majority and laggard stage. Governments should thus devise and implement appropriate strategies for the major potential adopters in each stage instead of adopting a one-size-fits-all strategy. The results of this study provide a valuable reference for countries in early stages of broadband development or for those planning or reviewing their strategies. © 2012 Elsevier Ltd.


News Article | August 13, 2016
Site: www.techtimes.com

Asus may have its first round smartwatch in the pipeline dubbed ZenWatch 3, as suggested by leaked images of the wearable. The smartwatch was originally spotted in a listing by the Federal Communications Commission (FCC). Now, latest photos of the purported Asus offering have now been leaked from China's National Communications Commission (NCC). Reports suggest that the Chinese agency may have forgotten to ask Asus if the company wanted the images to stay confidential. If the leaked images of the ZenWatch 3 are to be believed then it could be the first Asus smartwatch with a round dial. Previous versions of the ZenWatch were available in different sizes, but they all had rectangular dials. The leaks from FCC revealed that the ZenWatch 3 will have a stainless steel body, which has been re-affirmed by the NCC leak. Latest images show that the Asus wearable will have three buttons on the side. The ZenWatch 3 will not support contactless charging as the leaked images show two pins at the back of the wearable, which would be used for charging the device via a charging dock. The ZenWatch 3 is expected to support Bluetooth 4.2 and Wi-Fi 802.11 b/g/n (2.4 GHz). It is likely that the next Asus smartwatch will run on Android Wear 2.0. Wearables with a round form factor have attracted many customers. A number of smartwatches such as Motorola Moto 360, Samsung Galaxy Gear S2 and more have round dial. However, Apple Watch, which is one of the most popular smartwatches available in the market has a rectangular dial. Asus revealed the original ZenWatch during the 2014 IFA. The successor of the wearable — ZenWatch 2 — was announced at the 2015 IFA. Given the launches of the previous ZenWatch models, it is highly likely that Asus will confirm the next-gen ZenWatch 3 at the upcoming 2016 IFA that kicks off in early September. Just like the ZenWatch 2, the ZenWatch 3 may also be compatible with iOS and Android devices. The ZenWatch 2 enables users to get 50 percent charging in just 36 minutes. ZenWatch 3 customers should expect similar or faster charging capability of their smartwatch. At launch, the ZenWatch 2 had a price tag of about $150 in the U.S. Customers will hope that the ZenWatch 3 has similar pricing as its predecessor. Asus has not confirmed any details of the ZenWatch 3, which means customers should take rumors with a pinch of salt. Wearable fans will have to wait for about a couple of weeks to find if Asus officially launches its next smartwatch at the IFA. © 2017 Tech Times, All rights reserved. Do not reproduce without permission.

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