As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array now become a vital issue. Mostly, researchers have used a planar antenna array to get a high directive antenna with bett...
As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array now become a vital issue. Mostly, researchers have used a planar antenna array to get a high directive antenna with better performances. However, the planar array's gain is limited. It contributes high sidelobe levels and strong mutual coupling effects those need to overcome. In this paper, a new configuration of 4 elements circular equivalent planar array has been proposed to achieve high gain and directivity with lower sidelobe level. After being designed and simulated, the proposed antenna array has achieved high directivity of 15.3 dBi with 85 % radiation efficiency. Besides, the array has a maximum realized gain of 14.51 dB and low sidelobe level of – 15.1 dB. In turn, the high directivity of the proposed antenna array resonating at 5.8 GHz with very minimum return loss makes it suitable for Radar application.
Retrieval of images and videos are based on user's keyword. Video ranking is based on the number of likes and the keyword entered. Then, it will be compared with the maximum matching keywords. A searching algorith...
Retrieval of images and videos are based on user's keyword. Video ranking is based on the number of likes and the keyword entered. Then, it will be compared with the maximum matching keywords. A searching algorithm is used in order to rank the images. A search engine is created in which images are retrieved by the keyword entered and the images are ranked according to the keyword and description of an image. All keywords would be stored in the database so that any image could be retrieved. Next, videos are retrieved by the keyword and language, if language is mentioned. The videos are sorted in ascending order of likes.
This paper presents the idea of securing the smart devices used at our home or work spaces. Smart mirrors are devices which are equipped with peripherals such as a one-way mirror placed on top of LED monitor, Raspberr...
This paper presents the idea of securing the smart devices used at our home or work spaces. Smart mirrors are devices which are equipped with peripherals such as a one-way mirror placed on top of LED monitor, Raspberry pi, Microphones and Speakers. Smart mirrors eliminate the need for checking our phones for latest news or updates. It provides the necessary information such as clock, calendar, news, weather reports. It displays all the notifications of our mobile devices which is connected via LAN. It interacts with the user through verbal commands and provides compliments as well. It has a web interface which can be used by the user/owner of the smart mirror to configure, start/stop the service. The data stored in the device is encrypted using 128-bit AES Algorithm. The encryption is done through a USB device which stores the 128-bit long key.
Nowadays, cities are increasingly required to be smart, sustainable, resilient and adaptive and, particularly following the COVID-19 pandemic, an integrated approach to transport planning needs to be adopted. In fact,...
Nowadays, cities are increasingly required to be smart, sustainable, resilient and adaptive and, particularly following the COVID-19 pandemic, an integrated approach to transport planning needs to be adopted. In fact, European policies have adopted a series of limitations in the transport sector that led the scientific community to put into question the traditional transport planning process, by accelerating processes close to sustainability, started some time ago. In fact, many efforts in terms of strategies, initiatives and research have been made in the last decade to enhance new forms of sustainable urban mobility, in order to reduce the externalities associated with the transport sector. To achieve this goal, the European Commission has emphasized the integrated planning at all mobility levels. Among the other instruments, it has been identified a key role in the writing of the Sustainable Urban Mobility Plan (SUMP), its management and also through Intelligent Transport Systems (ITS). Based on this premise, the aim of this paper is to present first results of a wider research aimed at investigating the methodological and practical approaches to boost the strategy of integration between transport systems and urban planning by using ITS technologies and infomobility systems. The research can support further investigations in order to define specific Key Performance Indicators (KPIs) to measure and monitoring the impacts of technologies on developing smart cities and promoting sustainable mobility approaches, facing the urban planning and transport mobility issues of modern society.
The mobility scenarios have been modified by the COVID-19 pandemic. Catastrophic and health events cause strong repercussions on daily activities and related mobility habits. In Italy, as in other contexts, we have wi...
The mobility scenarios have been modified by the COVID-19 pandemic. Catastrophic and health events cause strong repercussions on daily activities and related mobility habits. In Italy, as in other contexts, we have witnessed a period of lockdown that has led to an almost zero travel. This work shows an overview of the changes in mobility choices before and after the COVID-19, with particular attention to sustainable forms of mobility such as shared mobility. It can reduce the use of private vehicles if properly incentivized and can be enhanced within the different forms of urban mobility, adopting ad hoc strategies and encouraging the active participation of the population in the assessment of critical issues and solutions towards sustainability. First results, analyzed at national level, provide a basis for future research steps on the assessment of the perceived safety by users in the use of different forms of mobility before and after the pandemic.
To support the broader realization of agrivoltaics in the U.S., this research provides a multidimensional assessment of the socio-political barriers and opportunities for development. A synthesis of five empirical stu...
To support the broader realization of agrivoltaics in the U.S., this research provides a multidimensional assessment of the socio-political barriers and opportunities for development. A synthesis of five empirical studies is presented: 1) an investigation of the impediments to farmer adoption; 2) an exploration of development challenges from the perspective of solar industry professionals; 3) a survey gauging public support and siting preferences for agrivoltaics; 4) a life cycle assessment of a pasture-based agrivoltaic system; and 5) the development of a comprehensive legal framework for agrivoltaics in the U.S. The assessment reveals the intersectionality among key stakeholders, communities, the environment, and legal frameworks, which can inform agrivoltaic decision making, stakeholder relations, and policy design globally. The primary socio-political barriers identified include: techno-economic challenges, community resistance, lack of financial incentive for both sectors, and restrictive local land use policy. The central socio-political opportunities include: income diversification, enhanced community relations and acceptance, energy demand and emissions reduction, and policy integration between key sectors. These findings demonstrate the need for multidimensional and interdisciplinary approaches to agrivoltaic development and an increased research focus on socio-political considerations.
The present work interest in the cooling of electrical power chips, because such elements were prone to fail as a result of thermal load. A numerical analysis was performed aiming to study and investigate of improveme...
The present work interest in the cooling of electrical power chips, because such elements were prone to fail as a result of thermal load. A numerical analysis was performed aiming to study and investigate of improvement natural convection heat transfer by using two types of fins “cylindrical and twisted tapes fin” to maximize the cooling process and augmentation the heat dissipation rate of electronic circuits, Computational Fluid Dynamic “CFD” technique based on finite control volume method was adopted in form of ANSYS-FLUENT 19.1 program, the modeling process was carried out using SOLIDWORK program to design and build up the geometry. Since the geometry has curves and sharp edges unstructured mesh was applied with tetrahedron element for a better and accurate result. Mesh dependency was applied to check if the solution results are affected by the number of elements. The results found, the temperature difference increase with fin length increase and when twisted-tapes fins are used the temperature will be decreased to 268.27°C as compared with cylindrical fins that give 295.14°C, so using twisted tape fins will improve the heat transfer by 9% and minimizing generated temperature and thermal stress. the less material consumption with twisted-tapes fin design is cost-effective.
In this paper, a numerical study has been conducted on the heat transfer of non-Newtonian nanofluid (Copper-Water) in a vertical rectangular cavity in the presence of a horizontal or angular magnetic field. The numeri...
In this paper, a numerical study has been conducted on the heat transfer of non-Newtonian nanofluid (Copper-Water) in a vertical rectangular cavity in the presence of a horizontal or angular magnetic field. The numerical simulation has been accomplished using the graphics process unit (GPU) accelerated multiple-relaxation-time (MRT) lattice Boltzmann method. A modified power-law model has been employed to characterize the non-Newtonian fluid behavior. The simulation presented in this paper spans a range of power-law index (0.6 ≤ n ≤ 1.0), Hartmann number (0 ≤ Ha ≤ 50) and nanoparticle volume fraction (0 ≤ φ ≤ 0.05). Results indicate that an increment of the power-law index leads to reduce the heat transfer rate from the hot walls. The heat transfer rate also drops when the Hartmann number is incremented. Moreover, augmentation of the volume fraction of nanofluids can enhance the average Nusselt number. Finally, the average Nusselt number increases when the magnetic field is applied at a different angle instead of 0°.
The present scenario in the electrical department is to improve energy proficiency and to investigate innovative compelling and increasingly smart approaches to use power consumption in industrial applications. Electr...
The present scenario in the electrical department is to improve energy proficiency and to investigate innovative compelling and increasingly smart approaches to use power consumption in industrial applications. Electrical machines are a basic requirement for operating various functions in the industry like a crane, blower, material handling systems, pharmaceutical industries and cement industries, etc. The three-phase Induction Motors (IM) is the prime wellspring of vitality employment in industrial applications. The utilization of the Variable Frequency Drives for the industrial application from a small range of induction motor into large capacity of induction motor ranges to improving the effectiveness and efficiency of the process output. The speed and position control is a combined module of the Variable frequency drive section and a Programmable Logic controller (PLC). So joining the VFD drive with the PLC controller brings out the effective outcome of controller efficiency. The V20 drive having a module of single-phase to three-phase inverter circuit connecting with induction motor to approach of innovation and accessibility of movement control of electric motor with conveyor model, the use of Programmable Logic controllers with power hardware in electrical machines developed and tested in the assembling hardware setup. In this hardware setup PLC with a VFD system for changing the position and speed more accurately of the drive system with load arrangements. The speed changing is proportionally generated by the PLC controller output signal. The speed control and position control of PLC based V20 drive module developed and tested successfully.
Home automation system has reached popularity due to advancement in communication technology where appliances are controlled over internet. It has been developed to support elderly and disabled people. Smart phones ar...
Home automation system has reached popularity due to advancement in communication technology where appliances are controlled over internet. It has been developed to support elderly and disabled people. Smart phones are used to receive input which is processed by Google application. In this system, android has been used to capture input voices which are transferred to Ardunio Uno. The received input signals are processed using Bluetooth interfaced Ardunio Uno which is used to control fan and light using relay module. Android operating system is used to achieve automation. Mobile phone and Bluetooth communication protocol are used to control various devices. Home automation aims to supply improved comfort, convenience and security. It helps the elderly and disabled by providing quality of life instead of requiring caregivers or institutional care.
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