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السجلات المعروضة 1 -- 20 من 348
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4-port MIMO antenna with defected ground structure for 5G millimeter wave applications
( MDPI AG , 2020 , Article)We present a 4-port Multiple-Input-Multiple-Output (MIMO) antenna array operating in the mm-wave band for 5G applications. An identical two-element array excited by the feed network based on a T-junction power combiner/divider ... -
7-O-methylpunctatin, a novel homoisoflavonoid, inhibits phenotypic switch of human arteriolar smooth muscle cells
( MDPI AG , 2019 , Article)Remodeling of arterioles is a pivotal event in the manifestation of many inflammation-based cardio-vasculopathologies, such as hypertension. During these remodeling events, vascular smooth muscle cells (VSMCs) switch from ... -
A case study to identify the hindrances to widespread adoption of electric vehicles in qatar
( MDPI AG , 2020 , Article)The adoption of electric vehicles (EVs) have proven to be a crucial factor to decreasing the emission of greenhouse gases (GHG) into the atmosphere. However, there are various hurdles that impede people from purchasing ... -
A combined method to model dynamic recrystallization based on cellular automaton and a phenomenological (CAP) approach
( MDPI AG , 2018 , Article)Titanium alloys with high stacking-fault energy show continuous dynamic recrystallization (CDRX) instead of discontinuous dynamic recrystallization (DDRX) during high-temperature deformation. During the CDRX mechanism, new ... -
A comparative review of natural and synthetic biopolymer composite scaffolds
( MDPI AG , 2021 , Article Review)Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery ... -
A comparative review of natural and synthetic biopolymer composite scaffolds
( MDPI AG , 2021 , Article Review)Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery ... -
A comparison of neighborhood-scale interventions to alleviate urban heat in Doha, Qatar
( MDPI AG , 2019 , Article)Recent evidence suggests that many densely populated areas of the world will be uninhabitable in the coming century due to the depletion of resources, climate change, and increasing urbanization. This poses serious questions ... -
A comprehensive review of the cyber-attacks and cyber-security on load frequency control of power systems
( MDPI AG , 2020 , Article Review)Power systems are complex systems that have great importance to socio-economic development due to the fact that the entire world relies on the electric network power supply for day-to-day life. Therefore, for the stable ... -
A fog computing solution for context-based privacy leakage detection for android healthcare devices
( MDPI AG , 2019 , Article)Intelligent medical service system integrates wireless internet of things (WIoT), including medical sensors, wireless communications, and middleware techniques, so as to collect and analyze patients' data to examine their ... -
A graphene-based glycan biosensor for electrochemical label-free detection of a tumor-associated antibody
( MDPI AG , 2019 , Article)The study describes development of a glycan biosensor for detection of a tumor-associated antibody. The glycan biosensor is built on an electrochemically activated/oxidized graphene screen-printed electrode (GSPE). Oxygen ... -
A holistic overview of Qatar's (Built) cultural heritage; Towards an integrated sustainable conservation strategy
( MDPI AG , 2019 , Article)Historic urban cores are the backbone of a city's cultural identity. Maintaining and preserving the socio-cultural, environmental and economic characteristics of the built heritage is vital for cultural identity survival. ... -
A hybrid nf-fo-ro process for the supply of irrigation water from treated wastewater: Simulation study
( MDPI AG , 2021 , Article)Municipal treated wastewater could be considered as a water source for food crop irrigation purposes. Enhancing the quality of treated wastewater to meet irrigation standards has become a necessary practice. Nanofiltration ... -
A modular approach for a patient unit for extracorporeal membrane oxygenation simulator
( MDPI AG , 2021 , Article)Despite many advancements in extracorporeal membrane oxygenation (ECMO), the procedure is still correlated with a high risk of patient complications. Simulation-based training provides the opportunity for ECMO staff to ... -
A modular IoT platform for real-time indoor air quality monitoring
( MDPI AG , 2018 , Article)The impact of air quality on health and on life comfort is well established. In many societies, vulnerable elderly and young populations spend most of their time indoors. Therefore, indoor air quality monitoring (IAQM) is ... -
A new hwma dispersion control chart with an application to wind farm data
( MDPI AG , 2020 , Article)Recently, a homogeneously weighted moving average (HWMA) chart has been suggested for the efficient detection of small shifts in the process mean. In this study, we have proposed a new one-sided HWMA chart to effectively ... -
A new insight in determining the percolation threshold of electrical conductivity for extrinsically conducting polymer composites through different sigmoidal models
( MDPI AG , 2017 , Article)The electrical conductivity of extrinsically conducting polymer composite systems passes through a transition state known as percolation threshold. A discussion has been made on how different Sigmoidal models (S-models), ... -
A novel method to identify initial values of chaotic maps in cybersecurity
( MDPI AG , 2019 , Article)Chaos theory has applications in several disciplines and is focusing on the behavior of dynamical systems that are highly sensitive to initial conditions. Chaotic dynamics are the impromptu behavior displayed by some ... -
A novel sensorless control for multiphase induction motor drives based on singularly perturbed sliding mode observer-experimental validation
( MDPI AG , 2020 , Article)This paper aims to develop an innovative sensorless control approach for a five-phase induction motor (IM) drive. The operation principle of the sensorless scheme is based on the sliding mode theory, within which a sliding ... -
A path walkability assessment index model for evaluating and facilitating retail walking using decision-tree-making (DTM) method
( MDPI AG , 2018 , Article)Transportation is the major contributor of ever-increasing CO2 and Greenhouse Gas emissions in cities. The ever-increasing hazardous emissions of transportation and energy consumption have persuaded transportation and urban ... -
A planar ultrawideband patch antenna array for microwave breast tumor detection
( MDPI AG , 2020 , Article)In this paper, a compact planar ultrawideband (UWB) antenna and an antenna array setup for microwave breast imaging are presented. The proposed antenna is constructed with a slotted semicircular-shaped patch and partial ...
