There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

https://www.uta.edu/rfmems/GI_Sensor/papers/ac040049d.pdf

Fiber-Optic Chemical Sensors and Biosensors

Today cross-cutting approaches, where molecular engineering and clever processing are synergistically coupled, allow the chemist to tailor complex hybrid systems of various shapes with perfect mastery at different size scales, composition, functionality, and morphology. Hybrid materials with organic–inorganic or bio–inorganic character represent not only a new field of basic research but also, via their remarkable new properties and multifunctional nature, hybrids offer prospects for many new applications in extremely diverse fields. The description and discussion of the major applications of hybrid inorganic–organic (or biologic) materials are the major topic of this critical review. Indeed, today the very large set of accessible hybrid materials span a wide spectrum of properties which yield the emergence of innovative industrial applications in various domains such as optics, micro-electronics, transportation, health, energy, housing, and the environment among others (526 references).

Applications of advanced hybrid organic–inorganic nanomaterials: from laboratory to market

An increase in world population along with a significant aging portion is forcing rapid rises in healthcare costs. The healthcare system is going through a transformation in which continuous monitoring of inhabitants is possible even without hospitalization. The advancement of sensing technologies, embedded systems, wireless communication technologies, nano technologies, and miniaturization makes it possible to develop smart systems to monitor activities of human beings continuously. Wearable sensors detect abnormal and/or unforeseen situations by monitoring physiological parameters along with other symptoms. Therefore, necessary help can be provided in times of dire need. This paper reviews the latest reported systems on activity monitoring of humans based on wearable sensors and issues to be addressed to tackle the challenges.

Wearable Sensors for Human Activity Monitoring: A Review

A theoretical analysis of a fiber-optic photonic-bandgap (PBG)-based nanorefractometer is presented. Changes up to 11.2 dB in the optical output power in an index of refraction range of 1.7 with a sensitivity of 1.5/spl middot/10/sup -4/ have been demonstrated. The design is based on a one-dimensional PBG structure with two defects, which originates two defect states inside the bandgap. These states correspond to two localized modes in the defects. By selecting adequate parameters, the frequency of one of the localized modes can be fixed at the same time that its peak amplitude varies with the refractive index of the defect associated to the other localized mode. The refractive index of the defect associated to the localized mode that has been fixed in frequency remains constant. This enables a detection scheme based on a simple photodetector instead of an optical spectrum analyzer, as usual. The thickness of the defect whose refractive index varies determines the variation range of the transmitted power amplitude peak of the localized mode fixed at a concrete frequency. In addition, an analysis of the nonlinear dependence on the refractive index of the peak-transmitted power of the localized mode fixed at a concrete frequency is presented.

/pdf/fiber-optic-nanorefractometer-based-on-one-dimensional-2xywllaotg.pdf

Fiber-optic nanorefractometer based on one-dimensional photonic-bandgap structures with two defects

Luminescent Optical Fiber Oxygen Sensor following Layer-by-layer Method☆

We have tested the viability of the Electrostatic Self-Assembly Method for the deposition of thin films on long period gratings in order to future developments of chemical sensors.

Electrostatic self-assembled thin films deposited on optical fiber long-period gratings for the fabrication of chemical sensors

In this work we study the interferometric behavior of polymeric ultra-thin coatings fabricated by the Layer-by-Layer Electrostatic Self-Assembly (LbL) technique at the end of cleaved optical fibers. The study of such FPI structures is very important for sensing applications as far as the LbL fabrication technique allows to tailor the properties of the optical cavity trough a smart design. The experimental data held well with the simulations. Finally pH sensors were successfully fabricated. The interferometric nature of these sensors improve significantly the sensitivity and the robustness of these kind of sensors.

Study on White Light Optical Fiber Interferometry for pH Sensor Applications

Women represent more than 50% of the University students both in Europe and the United States. According to this, one might assume that the number of female students in Engineering might have been progressively increasing. But, the under-representation of women in engineering degrees has become a persistent problem. This work presents an analysis of women enrolment in engineering degrees at the Public University of Navarre, where a negative tendency has been detected over the past 10 years. In order to understand the underlying causes of this situation, a survey was conducted among students of all engineering programs. As a conclusion, some straightforward actions that could attract more women to technological studies are proposed.

Ignacio R. Matias

Papers

Fiber-optic nanorefractometer based on one-dimensional photonic-bandgap structures with two defects

Luminescent Optical Fiber Oxygen Sensor following Layer-by-layer Method☆

Electrostatic self-assembled thin films deposited on optical fiber long-period gratings for the fabrication of chemical sensors

Study on White Light Optical Fiber Interferometry for pH Sensor Applications

Analysis of women enrollment in Engineering programs at the Public University of Navarre