Tuwanut, Panwit
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Tuwanut, Panwit
Alternative Name
Tuwanut, P.
Tuwanuti, Panwit
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panwit.tu@kmitl.ac.th
9 results
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Item type:Publication, Phase noise phenomenon explanation based multi-time variables differential equation technique(2016-09-06); In this article, the mathematical analysis is proposed to describe phase noise phenomenon. The principle of this proposed scheme is based on the multi-time variables differential equation technique. The analytic result clearly shows that noise is composed of multiplicative noise that spread around an oscillated frequency and additive noise acts as a noise floor of a system. To verify the proposed analysis, the computer simulation results are given which demonstrate that the obtained results agree well with the theoretical counterpart. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A survey on internet of things architecture, protocols, possible applications, security, privacy, real-world implementation and future trends(2016-02-04) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Implementation of vedic multiplier technique on multicore processor(2015-01-26); Thongbai, NopphagawThis article describes about the mathematic parallel process idea by using Vedic Multiplier techniques. Vedic mathematics is an ancient India that one type of quick trick for calculating that most popular and worldwide acceptation in tutor school. Vedic can apply to use in information technology, science field. They have many researches that used apply Vedic mathematics to accelerate effective of computation. In this paper using Urdhva Tiyakbhyam Sutra and Nikhilam Sutra with both to implement on Multi core processing with MPICH2 (MPI protocol). Urdhva Tiyakbhyam Sutra uses to splitting long digits to sub block for distributing to some other core. Nikhilam Sutra is used for reduce value to improve some of computation effectively. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, FM bandwidth scaling by Frequency operation under injection locked phenomena based on multi-time variable analysis(2017-05-30); This article, the FM bandwidth scaling technique under injection locked and super-harmonic injection locked phenomenon, which explained by forcing oscillation perspective with multi-time variable technique is presented. By forcing FM signal to harmonic oscillator, the FM bandwidth can be scaled. This scaling technique separated in two situations, the first one is an expansion technique under injection locked phenomenon, and the second one is a compression technique under super-harmonic injection locked phenomenon. The modified Colpitts oscillator is taken in examine, and principle verified by experimental result. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental performance evaluation of LoRaWAN: A case study in Bangkok(2017-09-05); The Internet of Things (IoT) is a vision which real-world objects are part of the internet. Every object is uniquely identified, and accessible to the network. There are various types of communication protocol for connect the device to the Internet. One of them is a Low Power Wide Area Network (LPWAN) which is a novel technology use to implement IoT applications. There are many platforms of LPWAN such as NB-IoT, LoRaWAN. In this paper, the experimental performance evaluation of LoRaWAN over a real environment in Bangkok, Thailand is presented. From these experimental results, the communication ranges in both an outdoor and an indoor environment are limited. Hence, the IoT application with LoRaWAN technology can be reliable in limited of communication ranges. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Image watermarking using joined wavelet and time domain(2014-10-14) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Influence of Light Intensity on a Motion Artifact Signal in a Photoplethysmographic Signal(2018-11-27); ; A photoplethygraphic (PPG) signal acquired from a commercial pulse oximeter is habitually disfigured by a motion artifact (MA) signal while any motion takes place. Inherently, the MA signal can either be additive or multiplicative, By having the MA signal intertwined with the PPG signal, the estimate of the oxygen saturation (SpO2) value is unreliable. The computation of SO02 value is based on proper red and infrared (IR) PPG signals measured by the pulse oximeter. Generally, the frequency components of the red and IR PPG signals as well as the MA signal are in the same range. To overwhelm this problem, the frequency components of the red and IR PPG signals are severed from the frequency band of the MA signal. To implement the separation, a legacy source of driving red and IR LEDs in the pulse oximeter is replaced by two alternating current sources having different frequencies. With this solution, the additive MA signal is no longer involved but the multiplicative MA signal is yet not concluded. In this work, change in light intensity fed to both red and IR LEDs is studied whether the changed light intensity has any impact on the multiplicative MA signal. According to the study, it is found that change in light intensity does not affect the multiplicative MA signal. The multiplicative MA signal still exists since the overall calculated SpO2 values have some error up to 1 %. Besides, change in light intensity does not improve the quality of the estimated SpO2 values while resting. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of multithread for long digit multiplier: By using ancient India Vedic mathematic(2017-11-03) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A performance evaluation for Internet of Things based on Blockchain technology(2019-07-01)