ABSTRACT Thin films of new pyrrolo[1,2-a][1,10]phenanthroline derivatives have been investigated ... more ABSTRACT Thin films of new pyrrolo[1,2-a][1,10]phenanthroline derivatives have been investigated by ultraviolet photoelectron spectroscopy, with a view of future applications in optoelectronic devices. The electronic band structure of investigated compounds (for electron energies ⩽25 eV) is to a great extent determined by substituent (R = NO2, Cl) induced transformations of molecular orbitals.
This paper present some considerations on the development of IoT systems. Among these application... more This paper present some considerations on the development of IoT systems. Among these applications we mention: intelligent house, automatic plant care system, automatic system for creating graphic elements, etc.
Spinel-type semiconductor compounds represent an alternative for robust and inexpensive detection... more Spinel-type semiconductor compounds represent an alternative for robust and inexpensive detection systems, due to their good thermal and chemical stability in operation. The sensing mechanism is based on the change in electric resistivity when exposed to specific gaseous ambient, resulting from chemical reactions between metal-oxide surface and gas molecules. Sample composition and morphology are key factors in determining the selectivity and sensitivity of solid-state sensors. In this work structural, morphological and sensory characteristics of some porous oxide semiconductors with spinel-type structure (Nk<inf>0.99</inf>Co<inf>0.01</inf>Mn<inf>0.02</inf>Fe<inf>1.98</inf>O<inf>4-δ</inf>, Li<inf>0.5</inf>Sm<inf>0.1</inf>Fe<inf>2.4</inf>O<inf>4</inf> and Mg<inf>0.9</inf>Sn<inf>0.1</inf>Fe<inf>2</inf>O<inf>4</inf>) are presented. The self-combustion technique was used to prepare these compounds. This method offers the advantage of obtaining nanosized reproducible and porous ceramics with high specific surface area and exact stoichiometry. Investigated compounds hold promise for high-performance applications in acetone sensors.
The article is aimed at presenting a semi-empirical model coded and computed in the programming l... more The article is aimed at presenting a semi-empirical model coded and computed in the programming language Python, which utilizes data gathered with a standard biaxial elastic lidar platform in order to calculate the altitude profiles of the structure coefficients of the atmospheric refraction index C N 2 ( z ) and other associated turbulence parameters. Additionally, the model can be used to calculate the PBL (Planetary Boundary Layer) height, and other parameters typically employed in the field of astronomy. Solving the Fernard–Klett inversion by correlating sun-photometer data obtained through our AERONET site with lidar data, it can yield the atmospheric extinction and backscatter profiles α ( z ) and β ( z ) , and thus obtain the atmospheric optical depth. Finally, several theoretical notions of interest that utilize the solved parameters are presented, such as approximated relations between C N 2 ( z ) and the atmospheric temperature profile T ( z ) , and between the scintillati...
ABSTRACT We present our results in developing processes and new materials for realization of new ... more ABSTRACT We present our results in developing processes and new materials for realization of new organic transistor which are promising for optoelectronics and radio frequency identification (RFID) applications. In this report we discuss the films morphology, profilometry and the field-effect transistor (FET) performances of pyrrolo phenanthroline derivatives (RA). We consider that because of π-conjugation which is extended and good alignment of molecules, the pyrrolo phenanthroline devices exhibited hole mobilities of up 0.031 cm2 V−1 s−1. The performance of these devices can be adequate for construction of 135-kHz RFID or high resolution display.
ABSTRACT We discuss in this progress report whether the surface investigations, means by ellipsom... more ABSTRACT We discuss in this progress report whether the surface investigations, means by ellipsometry, atomic force microscopy, spectroscopy and profilometry of Teflon (polytetrafluoroethlylene - PTFE) thin films deposed by electron sputtering in vacuum on different materials. The substrates materials can be used in bioengineering and medicine applications. We found that the surface morphology and structures properties of Teflon thin films depend of parameters selected in deposition process as deposition rate, substrates temperature, deposition temperature, electron activation energy. This study can be used to improve new medical applications and new optoelectronic devices. Recent reports in transfer cold friction of Teflon thin film layers are discussed in the context of material requirements for such special applications because the formation of or oriented networks gives new benefits of the surface obtained.
ABSTRACT Mobile and at-home healthcare systems are becoming increasingly important due to the cur... more ABSTRACT Mobile and at-home healthcare systems are becoming increasingly important due to the current hospital crowding and long access-time to health services. The use of modern information and communication technologies in health applications and the development of low-cost medical equipment appropriate to personal and home use are among the top research priorities worldwide. In this paper, we present the design and implementation of a novel wireless electrocardiography device which is user-friendly, low cost and low power consumer, and has a high degree of interconnectivity with terminals such as smartphone, laptops, tablets and PCs. These features make it appropriate for mobile and at-home healthcare applications.
ABSTRACT Thin films of new pyrrolo[1,2-a][1,10]phenanthroline derivatives have been investigated ... more ABSTRACT Thin films of new pyrrolo[1,2-a][1,10]phenanthroline derivatives have been investigated by ultraviolet photoelectron spectroscopy, with a view of future applications in optoelectronic devices. The electronic band structure of investigated compounds (for electron energies ⩽25 eV) is to a great extent determined by substituent (R = NO2, Cl) induced transformations of molecular orbitals.
This paper present some considerations on the development of IoT systems. Among these application... more This paper present some considerations on the development of IoT systems. Among these applications we mention: intelligent house, automatic plant care system, automatic system for creating graphic elements, etc.
Spinel-type semiconductor compounds represent an alternative for robust and inexpensive detection... more Spinel-type semiconductor compounds represent an alternative for robust and inexpensive detection systems, due to their good thermal and chemical stability in operation. The sensing mechanism is based on the change in electric resistivity when exposed to specific gaseous ambient, resulting from chemical reactions between metal-oxide surface and gas molecules. Sample composition and morphology are key factors in determining the selectivity and sensitivity of solid-state sensors. In this work structural, morphological and sensory characteristics of some porous oxide semiconductors with spinel-type structure (Nk<inf>0.99</inf>Co<inf>0.01</inf>Mn<inf>0.02</inf>Fe<inf>1.98</inf>O<inf>4-δ</inf>, Li<inf>0.5</inf>Sm<inf>0.1</inf>Fe<inf>2.4</inf>O<inf>4</inf> and Mg<inf>0.9</inf>Sn<inf>0.1</inf>Fe<inf>2</inf>O<inf>4</inf>) are presented. The self-combustion technique was used to prepare these compounds. This method offers the advantage of obtaining nanosized reproducible and porous ceramics with high specific surface area and exact stoichiometry. Investigated compounds hold promise for high-performance applications in acetone sensors.
The article is aimed at presenting a semi-empirical model coded and computed in the programming l... more The article is aimed at presenting a semi-empirical model coded and computed in the programming language Python, which utilizes data gathered with a standard biaxial elastic lidar platform in order to calculate the altitude profiles of the structure coefficients of the atmospheric refraction index C N 2 ( z ) and other associated turbulence parameters. Additionally, the model can be used to calculate the PBL (Planetary Boundary Layer) height, and other parameters typically employed in the field of astronomy. Solving the Fernard–Klett inversion by correlating sun-photometer data obtained through our AERONET site with lidar data, it can yield the atmospheric extinction and backscatter profiles α ( z ) and β ( z ) , and thus obtain the atmospheric optical depth. Finally, several theoretical notions of interest that utilize the solved parameters are presented, such as approximated relations between C N 2 ( z ) and the atmospheric temperature profile T ( z ) , and between the scintillati...
ABSTRACT We present our results in developing processes and new materials for realization of new ... more ABSTRACT We present our results in developing processes and new materials for realization of new organic transistor which are promising for optoelectronics and radio frequency identification (RFID) applications. In this report we discuss the films morphology, profilometry and the field-effect transistor (FET) performances of pyrrolo phenanthroline derivatives (RA). We consider that because of π-conjugation which is extended and good alignment of molecules, the pyrrolo phenanthroline devices exhibited hole mobilities of up 0.031 cm2 V−1 s−1. The performance of these devices can be adequate for construction of 135-kHz RFID or high resolution display.
ABSTRACT We discuss in this progress report whether the surface investigations, means by ellipsom... more ABSTRACT We discuss in this progress report whether the surface investigations, means by ellipsometry, atomic force microscopy, spectroscopy and profilometry of Teflon (polytetrafluoroethlylene - PTFE) thin films deposed by electron sputtering in vacuum on different materials. The substrates materials can be used in bioengineering and medicine applications. We found that the surface morphology and structures properties of Teflon thin films depend of parameters selected in deposition process as deposition rate, substrates temperature, deposition temperature, electron activation energy. This study can be used to improve new medical applications and new optoelectronic devices. Recent reports in transfer cold friction of Teflon thin film layers are discussed in the context of material requirements for such special applications because the formation of or oriented networks gives new benefits of the surface obtained.
ABSTRACT Mobile and at-home healthcare systems are becoming increasingly important due to the cur... more ABSTRACT Mobile and at-home healthcare systems are becoming increasingly important due to the current hospital crowding and long access-time to health services. The use of modern information and communication technologies in health applications and the development of low-cost medical equipment appropriate to personal and home use are among the top research priorities worldwide. In this paper, we present the design and implementation of a novel wireless electrocardiography device which is user-friendly, low cost and low power consumer, and has a high degree of interconnectivity with terminals such as smartphone, laptops, tablets and PCs. These features make it appropriate for mobile and at-home healthcare applications.
International Conference on Sensing and Instrumentation in IoT Era (ISSI), 2019
Application and implementation of Internet of
Things principles promise to radically change our r... more Application and implementation of Internet of Things principles promise to radically change our regular lifestyle. Beyond the tempting facilities offered by smart home appliances, this work proposes some innovative medical applications of Internet of Things Relevant aspects related to the structure of a system based on brainwave interfaces, the results obtained so far, as well as the high complexity of these systems were analyzed. Besides, in the current and especially the future technological context, a new challenge – independent green energy, was introduced. Capturing and recovering the energy from ambient EMF will be the "zero-power" solution of sensor networks, already recognized as one of the most important technologies for real-world deployment of Internet of Things systems.
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Things principles promise to radically change our regular
lifestyle. Beyond the tempting facilities offered by smart home
appliances, this work proposes some innovative medical
applications of Internet of Things Relevant aspects related to
the structure of a system based on brainwave interfaces, the
results obtained so far, as well as the high complexity of these
systems were analyzed. Besides, in the current and especially
the future technological context, a new challenge – independent
green energy, was introduced. Capturing and recovering the
energy from ambient EMF will be the "zero-power" solution of
sensor networks, already recognized as one of the most
important technologies for real-world deployment of Internet
of Things systems.