The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents different properties of silicon nanowire when a hole of sub-wavelength diameter is introduced in the central region. The analysis has been carried out using edge element based vector finite element method (FEM). It has been found that the light enhancement and the average mode intensity are higher within smaller holes. The nonlinear coefficient and the group velocity dispersion...
In this paper, we investigate the coexistence problem between Wi-Fi and a pre-standard form of LTE over unlicensed bands, namely, LTE-Unlicensed (LTE-U). We address two coexistence problems. First, the different access mechanisms for Wi-Fi and LTE-U can lead to an increase in the collision rate and higher latency for both systems. We propose a modified Wi-Fi operation mode, whereby Wi-Fi stations...
U-shaped Assembly Line (UAL) applies the just-in-time principle which decreases the waste in the operations. This paper presents the UAL model which bases on an uncertain task time. It consists of eight certain tasks and three uncertain tasks. The objective function of the model is the minimum number of workstations. The model formulates on a zero-one integer linear programming. The distribution of...
Safety operation/measures are of great concern and among them islanding phenomena takes an important role for reliable energy. Therefore, the utility grid requires anti-islanding protection for a safe and reliable operation. For this purpose, a different and fast method is proposed for islanding detection in PV systems. The suggested method is based on instantaneous power calculation at the point...
Decentralized coded caching is studied for a content server with N files, each of size F bits, serving K active users, each equipped with a cache of distinct capacity. It is assumed that the users' caches are filled in advance during the off-peak traffic period without the knowledge of the number of active users, their identities, or the particular demands. User demands are revealed during the peak...
Data are inevitable part of human life. In the past, only small data portions were processed, however, nowadays, data significance and relevance is high, it is necessary to manage huge data amount, data requirements are still rising. Adding temporal data definition extends actual conventional paradigm of processing and brings real problems based on performance degradation. In this paper, we propose...
In recent years, distributed generation units became attractive due to its technical, economic and environmental benefits. This paper dealt with the optimal placement and sizing of DG units in radial distribution networks. For this purpose, three kinds of this latest have been employed (injection of active power, injection of reactive power and injection of both powers together). Then, a new optimization...
For the learning and teaching process is not enough to count with the right type of methodology according to the objectives. The successful implementation of this is in some cases is linked to the way it is carried out; in other words, the application itself. There are projects in this field which fail to succeed simply because teachers who are new do not have prior experience and make mistakes in...
The implementation of a low-cost electro pneumatic bank from an existing educational pneumatic equipment is exposed. The proposed bank operates with a PLC. To demonstrate its advantage, a stamping machine is simulated using Ladder and Grafcet language. This demonstration can simulate any machine or process requiring up to four electro pneumatic cylinders.
Writing high quality papers for international publications is crucial for generate a real impact on the scientific community. In this paper some relevant recommendations are given in order to generate quality publications. These tips have been generated and compiled based on the experience and material released on the Internet by a large number of authors. With this, it is hoped to contribute with...
In this work a medium-sized port is analysed, which acts as a mixed network, interacting with private companies, trade associations, social groups and components of the State. Each public and private actor declares strategic phrases and rubrics in his/her mission, they can relate to the political, economic, social, technological and environmental multi-criteria macro-environment classification (PESTA)...
The DC photoconductivity of powdered silicon samples was studied. Effective sensitization of photoconductivity for semiconductors with organic dyes applied to the surface of microcrystalls was found. Photoconductivity in the absorption band of the dyes in the visible part of the spectrum is increasing by more than an order of magnitude.
Analysis of the capacitance distribution over the cross-section of the micro-strip line is considered. The calculations were carried out using a finite element method after conformal mapping of the considered area. The results obtained allow calculating the capacitance in the cross-section of the unit length micro-strip line (discrete) on the top and bottom surfaces and edges of the micro-strip line.
The inter-digit coordination during precision grip was assessed using a recurrence-based phase synchronization (PS) analysis in this study. The PS across the normal forces of the thumb and index finger with respect to the contact surface serve as a critical dynamical strategy underlying precision grip. When both the thumb and index finger had reduced tactile sensitivity, the PS of Fz increased compared...
This paper shows the application of a multi-criteria analysis method for prioritization of commercial and supply restoration services in an electricity distribution company. The methodology is based on the Macbeth algorithm and on a large amount of input parameters that are evaluated in order to set the relative importance of each service. This study is of great relevance and complexity because it...
We have experimentally demonstrated a compact polarization beam splitter based on the augmented-low-index-guiding structure in the silicon nitride/silicon-on-insulator platform. The device is only 4.8 microns long. The design of the device is robust and has a good fabrication tolerance.
La capacidad de percibir visualmente tres dimensiones constituye una ventaja importante para la adaptación al entorno; consciente de esto la humanidad ha desarrollado diferentes tecnicas y tecnologías que permiten replicar este fenomeno a partir de imágenes sinteticas. Los autoestereogramas son un metodo para la presentation de imagenes con profundidad estereoscopica que cuenta con características...
in this study we describe the design, the simulation and the characterization of a waveguided plasmonic lens on SOI. The lens is made of gold nanowires on a SOI waveguide. A thin silicon dioxide layer separates the gold nanowires from the SOI waveguide. This lens is made of a gradient index corresponding to the effective index of the gold wires on the silicon waveguide. Simulations and characterizations...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.