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RISS 인기검색어
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- 저자 : Atta Ullah (검색결과 6 건)
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Interoperable Internet-of-Things platform for smart home system using Web-of-Objects and cloud
Iqbal, Asif,Ullah, Farman,Anwar, Hafeez,Kwak, Kyung Sup,Imran, Muhammad,Jamal, Waseef,Rahman, Atta ur Elsevier 2018 Sustainable cities and society Vol.38 No.-
<P><B>Abstract</B></P> <P>Recent advancements in the Internet, web and communication technologies cut across many areas of modern-day living and enabled interconnection of every physical object, including, sensors and actuators. Web-enabled smart objects empower innovative services and applications for different domains and improve utilization of resources. In this paper, we propose an interoperable Internet-of-Things (IoTs) platform for a smart home system using a Web-of-Objects (WoO) and cloud architecture. The proposed platform controls the home appliances from anywhere and also provides the homes’ data in the cloud for various service providers’ applications and analysis. Firstly, we proposed a Raspberry PI based gateway for interoperability among various legacy home appliances, different communication technologies, and protocols. Secondly, we bring the smart home appliances to the web and make it accessible through the Representational State Transfer (REST/RESTful) framework. Thirdly, we will provide the cloud server for smart homes’ to store the homes’ data due to low storage capabilities at a gateway and provide the data for various application’s service providers and analysis. In the proposed smart home platform, we implement a water-tank control using Zigbee communication, an automatic door security using a normal camera as an IP camera, and provide web connectivity to different home devices for web-based controlling. We aim to reduce the human intervention, secure access control to home devices from anywhere, provide smart homes data for application services as well as for analysis, and improve the utilization of resources.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Proposed an interoperable and flexible internet-of-things platform for smart home system using web-of-objects and cloud infrastructure. </LI> <LI> Provided Raspberry PI based gateway for interoperability among various legacy home appliances, different communication technologies, and protocols. </LI> <LI> RESTful based smart home system to assign a unique URIs to each sensor data and an actuator event to reduce the processing at the webserver. </LI> <LI> Provided cloud server storing smart homes data due to low storage capabilities at a gateway and providing data for service providers and analysis. </LI> </UL> </P>
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A Comprehensive Study of SARS-CoV-2: From 2019-nCoV to COVID-19 Outbreak
( Abdul Waris ),( Muhammad Ali ),( Atta Ullah Khan ),( Asmat Ali ),( Abdul Baset ) 한국미생물 · 생명공학회 2020 한국미생물·생명공학회지 Vol.48 No.3
The coronavirus disease 2019 (COVID-19) is a highly contagious pneumonia that has spread throughout the world. It is caused by a novel, single stranded RNA virus called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Genetic analysis revealed that, phylogenetically, the SARS-CoV-2 is related to severe acute respiratory syndrome-like viruses seen in bats. Because of this, bats are considered as a possible primary reservoir. The World Health Organization has declared the COVID-19 outbreak as a pandemic. As of May 27, 2020, more than 5,406,282 confirmed cases, and 343,562 confirmed deaths have been reported worldwide. Currently, there are no approved vaccines or antiviral drugs available against COVID-19. Newly developed vaccines are in the first stage of clinical trials, and it may take a few months to a few years for their commercialization. At present, remdesivir and chloroquine are the promising drugs for treating COVID-19 patients. In this review, we summarize the diversity, genetic variations, primary reservoirs, epidemiology, clinical manifestations, pathogenesis, diagnosis, treatment strategies, and future prospects with respect to controlling the spread of COVID-19.
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Fawad Ashraf,Zaeem Bin Babar,Jun-Hyun Park,Ahsan Ali,Ullah Atta,Ho-Jin Lim 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
Recent studies have put significant attention on contribution of NH₃ in formation of secondary organic aerosol (SOA). This study presents SOA formation in KNU smog chamber at. SOA yields from the photo-oxidation of anthropogenic volatile organic compounds (VOCs) like benzene, toluene, ethylbenzene, m-xylene and biogenic VOCs like α-pinene and isoprene were investigated individually. Experiments were conducted in humid air (RH~60%), HONO as precursor of OH radical, and (NH₄)₂SO₄ as seed particle. In all the experiments the mixing ratios of NOx, SO₂, and NH₃ were 10, 2, and 5, with respect to VOC concentration, respectively. A scanning mobility particle sizer and ion chromatograph were used to determine SOA mass concentration. Particulate matter was collected on Teflon membrane filters for composition analysis with IC. SOA yield in presence of NOx, SO₂, and NH₃ was used to estimate parameters of two-product model and compared with model parameters of Community Multiscale Air Quality. A significant increase in SOA yield was observed in the presence of NH₃ compared to absence of NH₃. A preliminary analysis with Fourier transform infrared spectroscopy confirmed the presence of nitrogen-containing functional groups in SOA formed in the presence of NH₃.
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Afrasyab Khan,Mohd Sobri Takriff,Masli Irwan Rosli,Nur Tantiyani Ali Othman,Khairuddin Sanaullah,Andrew Ragai Henry Rigit,Ajmal Shah,Atta Ullah 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.1
Handling and utilization of steam flow efficiently to obtain various tangible industrial outcomes relies mainly upon how to optimize various flow parameters like boundary layer thickness, skewness, shear stress, and turbulent dissipation for minimum losses such as pressure and heat. Swirling steam flow, driven by a propeller through a circular duct along horizontal and inclined surfaces presents an interesting flow regime that includes the boundary layer flows close to the wall of the pipe and weak and uniform flow that prevails across the inner region of the pipe. Such flow was investigated here with a specially designed experimental facility. Convective Instabilities were observed that propagate along the axial direction in a nonlinear fashion. It was observed that the operating conditions could be optimized for measuring the shear stresses based on the intersection of the profiles under the effect of variations in the inlet pressure of steam and the rotational speed of the propeller. We found that the flow transformed from positive to negative skewness when the rotational speed of the propeller was raised from 4-14 thousand per minute at 10 bars of constant inlet steam pressure. More area came under the effect of reduced skin friction when the rotational speed of the propeller was raised. More turbulent energy was found to be dissipated when the rotational speed of the propeller was raised. It was found that yet the dissipation of the turbulent energy takes place under the joint effect of inlet pressure of steam and the rotational speed of the propeller, but the exact effect of any one of these two operating parameters still needs to be determined and requires further investigation.
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