scholarly journals Hydrogel Sensors for the Agricultural Applications

2020 ◽  
Author(s):  
Ruba Ali ◽  
Tamim Al-Rashid ◽  
Youusef Al-Mahmoud ◽  
Kishor Kumar
Keyword(s):  
Plant Growth ◽  
Experimental Work ◽  
High Efficiency ◽  
Near Field ◽  
Soil Porosity ◽  
Near Field Communication ◽  
Arabic Gum ◽  
Communication Device ◽  
Agricultural Applications ◽  
Control Water

This work is focused on the design and fabrication of hydrogel sensors for the agricultural applications, “a multi-sensory device”. Agriculture is an important contributor to Qatar’s economy, as the country is aiming to produce more local products. We chose to use hydrogel in soil, for their high efficiency in absorbing water. The hydrogel will be embedded in a multisensory device that will provide consistent plant watering when soil is dry and in need for water. The multi-sensory device will employ NFC switch “Near Field Communication” which is a wireless communication device used to control water flow for plant irrigation. Also, the experimental work including enhancing soil properties by using Arabic gum (sodium 2-[(7-carboxyheptyl)-Chydroxycarbonimidoyl] benzen-1-olate), a biodegradable and naturally available polymer. It is proven that it decreases soil porosity, enhances the reinforcement between the soil and the hydrogel therefore retaining more water and preventing evaporation, it also increases plant growth through fixating nitrogen in the soil.

scholarly journals Design of Multi Standard Near Field Communication Outphasing Transmitter with Modulation Wave Shaping

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 188
Author(s):  
Žiga Korošak ◽  
Nejc Suhadolnik ◽  
Anton Pleteršek
Keyword(s):  
Radio Frequency Identification ◽  
High Efficiency ◽  
Near Field ◽  
Cmos Technology ◽  
Near Field Communication ◽  
Differential Delay ◽  
Fully Differential ◽  
Delay Locked Loop ◽  
Modulation Wave ◽  
The Individual

The aim of this work is to tackle the problem of modulation wave shaping in the field of near field communication (NFC) radio frequency identification (RFID). For this purpose, a high-efficiency transmitter circuit was developed to comply with the strict requirements of the newest EMVCo and NFC Forum specifications for pulse shapes. The proposed circuit uses an outphasing modulator that is based on a digital-to-time converter (DTC). The DTC based outphasing modulator supports amplitude shift keying (ASK) modulation, operates at four times the 13.56 MHz carrier frequency and is made fully differential in order to remove the parasitic phase modulation components. The accompanying transmitter logic includes lookup tables with programmable modulation pulse wave shapes. The modulator solution uses a 64-cell tapped current controlled fully differential delay locked loop (DLL), which produces a 360° delay at 54.24 MHz, and a glitch-free multiplexor to select the individual taps. The outphased output from the modulator is mixed to create an RF pulse width modulated (PWM) output, which drives the antenna. Additionally, this implementation is fully compatible with D-class amplifiers enabling high efficiency. A test circuit of the proposed differential multi-standard reader’s transmitter was simulated in 40 nm CMOS technology. Stricter pulse shape requirements were easily satisfied, while achieving an output linearity of 0.2 bits and maximum power consumption under 7.5 mW.

scholarly journals Near-Field Communication Sensors

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3947 ◽  
Author(s):  
Zhonglin Cao ◽  
Ping Chen ◽  
Zhong Ma ◽  
Sheng Li ◽  
Xingxun Gao ◽  
...  
Keyword(s):  
Communication Technology ◽  
Low Cost ◽  
Near Field ◽  
Near Field Communication ◽  
Daily Life Activities ◽  
Quality Detection ◽  
Communication Device ◽  
Real World Applications ◽  
Wireless Signal ◽  
Communication Devices

Near-field communication is a new kind of low-cost wireless communication technology developed in recent years, which brings great convenience to daily life activities such as medical care, food quality detection, and commerce. The integration of near-field communication devices and sensors exhibits great potential for these real-world applications by endowing sensors with new features of powerless and wireless signal transferring and conferring near field communication device with sensing function. In this review, we summarize recent progress in near field communication sensors, including the development of materials and device design and their applications in wearable personal healthcare devices. The opportunities and challenges in near-field communication sensors are discussed in the end.

scholarly journals Aplikasi Pengingat Lokasi dan Pembayaran Parkir

2019 ◽  
Vol 11 (2) ◽  
pp. 175
Author(s):  
Muhammad Rifqi ◽  
Andri Andri
Keyword(s):  
Metropolitan Area ◽  
Near Field ◽  
Smart Phone ◽  
Daily Activities ◽  
Near Field Communication ◽  
Technology Support ◽  
Communication Device

Nowadays people especially those in the metropolitan area or developing their livelihood on a smart phone. Based on this, there arose an idea to expand and enrich the smart phone functions not only as a medium of communication, but one of them as a device that can help people in carrying out daily activities. One of them as a device that can help people to supplement the existing weaknesses in him, such forgetfulness. Forgetting the parking location is one of human weakness because of forgetfulness. That requires a device that can help people to remember the location of parking their vehicles. In addition, the smart phone also can help people to make payment transactions more practical. Then, if a parking location reminder device combined with payment at the parking booth will be a very useful tool and efficient. With smart phone technology is increasingly sophisticated and technology support NFC (Near Field Communication) device is expected to be a solution to deal with problems that often occur in parking location and minimize queuing at the ticket counter payment of parking

RFID, NFC, Beacons, and the Infrastructures of Logistical Locative Media

2020 ◽  
pp. 474-486
Author(s):  
Jordan Frith
Keyword(s):  
Internet Of Things ◽  
Radio Frequency Identification ◽  
Near Field ◽  
Low Energy ◽  
Near Field Communication ◽  
Rfid Tags ◽  
Bluetooth Low Energy ◽  
Locative Media ◽  
Frequency Identification ◽  
Machine Readable

The phrase the Internet of things was originally coined in a 1999 presentation about attaching radio frequency identification (RFID) tags to individual objects. These tags would make the objects machine-readable, uniquely identifiable, and, most importantly, wirelessly communicative with infrastructure. This chapter evaluates RFID as a piece of mobile communicative infrastructure, and it examines two emerging forms: near-field communication (NFC) and Bluetooth low-energy beacons. The chapter shows how NFC and Bluetooth low-energy beacons may soon move some types of RFID to smartphones, in this way evolving the use of RFID in payment and transportation and enabling new practices of post-purchasing behaviors.

scholarly journals Novel System for Bite-Force Sensing and Monitoring Based on Magnetic Near Field Communication

Sensors ◽  
2012 ◽  
Vol 12 (9) ◽  
pp. 11544-11558 ◽  
Author(s):  
Andres Diaz Lantada ◽  
Carlos González Bris ◽  
Pilar Lafont Morgado ◽  
Jesús Sanz Maudes
Keyword(s):  
Near Field ◽  
Bite Force ◽  
Force Sensing ◽  
Near Field Communication
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