Search results for "FIX"
showing 10 items of 1335 documents
Attitudine alla consociazione di diverse leguminose foraggere mediterranee.
2011
Iodide-Photocatalyzed Reduction of Carbon Dioxide to Formic Acid with Thiols and Hydrogen Sulfide.
2016
The photolysis of iodide anions promotes the reaction of carbon dioxide with hydrogen sulfide or thiols to quantitatively yield formic acid and sulfur or disulfides. The reaction proceeds in acetonitrile and aqueous solutions, at atmospheric pressure and room temperature by irradiation using a low-pressure mercury lamp. This transition-metal-free photocatalytic process for CO2 capture coupled with H2 S removal may have been relevant as a prebiotic carbon dioxide fixation.
Tehnisko kļūdu novērtēšana un izskaušana rinomanometrijā
2016
KOPASAVILKUMS Ievads: Jaunas metodes tiek ieviestas, lai rastu vienkāršākus un ātrākus risinājumus spiediena caurules fiksācijai rimomanometrijā. Svarīgi ir pētīt ietekmes uz gaisa plūsmu, lai izvairītos no kļudainiem mērījumiem. Ar datorprogrammu saistītā rinomanometrija pamazām tiek aizstāta ar PNIF ierīci, jo tā ir lētāka un vieglāka lietošanā, līdz ar to ir svarīgi vispirms novērot korelāciju starp abām metodēm. Mērķis: Diplomdarba mērķis bija apzināties un piefiksēt kļūdas un sarežģījumus, kādi rodas veicot četru fāzu rinomanometriju, izmantojot dažādas spiediena caurulītes piestiprināšanas metodes. Vēlviens uzdevums bija apzināties un piefiksēt kļūdas, kas rodas PNIF testa procesā, kā…
The current state of the art of angle-stable volar plating in the treatment of distal epiphisis fractures
2011
Experimental assessment of changes in bone fragment position using infraread diodes on saw bone models with a hexapod fixator
2021
Background: The purpose of this study was an experimental assessment of changes in bone fragment position in patients with non-union of the tibia treated with a hexapod fixator. Hypothesis: We hypothesized that the use of hexapod fixators leads to differences between the planned and actual position of bone fragments. Methods: The study was conducted in physical models of the hexapod fixator–bone fragment system. Bone fragment displacement was measured using the Optotrak Certus Motion Capture System. We assessed differences between the planned and actual position of bone fragments. Results: Assessment of bone fragment compression demonstrated a difference between the target and actual correc…
Wireless OFDM-OQAM with a small number of subcarriers
2008
Orthogonal frequency division multiplexing based on offset quadrature amplitude modulation (OFDM-OQAM) is a multicarrier signaling technique which trades off robustness for spectral efficiency when compared to conventional OFDM with a cyclic prefix. In this paper, a novel matrix model for passband OFDM-OQAM signaling with a small number of subcarriers over a multipath frequency selective fading channel is presented. Specifically, in OFDM-OQAM a frequency selective channel is divided into many smaller but still frequency selective overlapping channels, so approximating the frequency response of a subchannel by the channel frequency response sampled at the subcarrier frequency may be inadequa…
A technical note on an experimental device to measure friction coefficient in sheet metal forming
2006
Abstract In the paper the authors present the results of several experimental tests aimed to determine the Coulomb friction coefficient in sheet metal forming operations at the varying of the sheet metal material and for different operative conditions. In particular a few pressure and lubricating conditions have been investigated. In order to develop such experiments a dedicated fixture was designed and set-up starting from the one proposed by Wilson.
The influence of eye movements on the temporal features of executed and imagined arm movements.
2007
The very close coordination between eye and hand indicates that eye movements are parts of the neural processes underlying the planning and control of arm movements. Eye movements are fundamental during observed actions and play a functional role in visual mental imagery. However, the role of eye movements during imagined actions is still unknown. Here, we report the timing features of eye and arm pointing movements for nine healthy participants in four conditions: Executed movements with orientation saccades (Eyes Free) or with no saccades (Eyes Motionless), and Imagined movements with Eyes Free or with Eyes Motionless. The first result was a facilitation effect of saccades upon both execu…
Fuzzy fixed points of generalized F2-geraghty type fuzzy mappings and complementary results
2016
The aim of this paper is to introduce generalized F2-Geraghty type fuzzy mappings on a metric space for establishing the existence of fuzzy fixed points of such mappings. As an application of our result, we obtain the existence of common fuzzy fixed point for a generalized F2-Geraghty type fuzzy hybrid pair. These results unify, generalize and complement various known comparable results in the literature. An example and an application to theoretical computer science are presented to support the theory proved herein. Also, to suggest further research on fuzzy mappings, a Feng–Liu type theorem is proved.
Some new fixed point theorems in fuzzy metric spaces
2014
Motivated by Samet et al. [Nonlinear Anal., 75(4) (2012), 2154-2165], we introduce the notions of alpha-phi -fuzzy contractive mapping and beta-psi-fuzzy contractive mapping and prove two theorems which ensure the existence and uniqueness of a fixed point for these two types of mappings. The presented theorems extend, generalize and improve the corresponding results given in the literature.