Next Issue
Volume 2, December
Previous Issue
Volume 2, June
 
 

Technologies, Volume 2, Issue 3 (September 2014) – 3 articles , Pages 115-163

  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list.
  • You may sign up for e-mail alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.
Order results
Result details
Section
Select all
Export citation of selected articles as:
3111 KiB  
Review
Near Field Communication: Technology and Market Trends
by Gabriella Arcese, Giuseppe Campagna, Serena Flammini and Olimpia Martucci
Technologies 2014, 2(3), 143-163; https://doi.org/10.3390/technologies2030143 - 05 Sep 2014
Cited by 13 | Viewed by 16404
Abstract
Among the different hi-tech content domains, the telecommunications industry is one of the most relevant, in particular for the Italian economy. Moreover, Near Field Communication (NFC) represents an example of innovative production and a technological introduction in the telecommunications context. It has a [...] Read more.
Among the different hi-tech content domains, the telecommunications industry is one of the most relevant, in particular for the Italian economy. Moreover, Near Field Communication (NFC) represents an example of innovative production and a technological introduction in the telecommunications context. It has a threefold function: card emulator, peer-to-peer communication and digital content access, and it could be pervasively integrated in many different domains, especially in the mobile payment one. The increasing attention on NFC technology from the academic community has improved an analysis on the changes and the development perspective about mobile payments. It has considered the work done by the GSMA (Global System for Mobile Communications Association) and the NFC Forum in recent years. This study starts from an analysis of the scientific contributions to Near Field Communication and how the main researches on this topic were conceived. Our focus is on the diffusion rates, the adoption rates and the technology life cycle. After that, we analyze the technical-economical elements of NFC. Finally, this work presents the state of art of the improvements to this technology with a deeper focus on NFC technologies applied to the tourism industry. In this way, we have done a case analysis that shows some of the NFC existent applications linked to each stage of the tourism value chain. Full article
Show Figures

Figure 1

1087 KiB  
Article
A 100-m Fabry–Pérot Cavity with Automatic Alignment Controls for Long-Term Observations of Earth’s Strain
by Akiteru Takamori, Akito Araya, Wataru Morii, Souichi Telada, Takashi Uchiyama and Masatake Ohashi
Technologies 2014, 2(3), 129-142; https://doi.org/10.3390/technologies2030129 - 06 Aug 2014
Cited by 3 | Viewed by 6092
Abstract
We have developed and built a highly accurate laser strainmeter for geophysical observations. It features the precise length measurement of a 100-m optical cavity with reference to a stable quantum standard. Unlike conventional laser strainmeters based on simple Michelson interferometers that require uninterrupted [...] Read more.
We have developed and built a highly accurate laser strainmeter for geophysical observations. It features the precise length measurement of a 100-m optical cavity with reference to a stable quantum standard. Unlike conventional laser strainmeters based on simple Michelson interferometers that require uninterrupted fringe counting to track the evolution of ground deformations, this instrument is able to determine the absolute length of a cavity at any given time. The instrument offers advantage in covering a variety of geophysical events, ranging from instantaneous earthquakes to crustal deformations associated with tectonic strain changes that persist over time. An automatic alignment control and an autonomous relocking system have been developed to realize stable performance and maximize observation times. It was installed in a deep underground site at the Kamioka mine in Japan, and an effective resolution of 2 × (10−8 − 10−7) m was achieved. The regular tidal deformations and co-seismic strain changes were in good agreement with those from a theoretical model and a co-located conventional laser strainmeter. Only the new instrument was able to record large strain steps caused by a nearby large earthquake because of its capability of absolute length determination. Full article
(This article belongs to the Special Issue Precision Measurements and Metrology Using Lasers)
Show Figures

Figure 1

610 KiB  
Article
Crustal Strain Observation Using a Two-Color Interferometer with Accurate Correction of Refractive Index of Air
by Souichi Telada, Akito Araya and Akiteru Takamori
Technologies 2014, 2(3), 115-128; https://doi.org/10.3390/technologies2030115 - 04 Jul 2014
Cited by 1 | Viewed by 4963
Abstract
A highly accurate two-color interferometer with automatic correction of the refractive index of air was developed for crustal strain observation. The two-color interferometer, which can measure a geometrical distance of approximately 70 m, with a relative resolution of 2 × 10−9, [...] Read more.
A highly accurate two-color interferometer with automatic correction of the refractive index of air was developed for crustal strain observation. The two-color interferometer, which can measure a geometrical distance of approximately 70 m, with a relative resolution of 2 × 10−9, clearly detected a change in strain due to earth tides in spite of optical measurement in air. Moreover, a large strain quake due to an earthquake could be observed without disturbing the measurement. We demonstrated the advantages of the two-color interferometer in air for geodetic observation. Full article
(This article belongs to the Special Issue Precision Measurements and Metrology Using Lasers)
Show Figures

Figure 1

Previous Issue
Next Issue
Back to TopTop