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Eco-friendly biodegradable polyurethane based coating for antibacterial and antifouling performance

Chinese Journal of Chemical Engineering 2023年第2期54卷 80-88页

作者： Abid Ali Bilal ul amin Wenwu Yu Taijiang Gui Weiwei Cong Kai Zhang Zheming Tong Jiankun Hu Xiaoli Zhan Qinghua Zhang College of Chemical and Biological Engineering Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China Institute of Mold Technology Changzhou Vocational Institute of Mechatronic TechnologyChangzhou 213164China State Key Laboratory of Marine Coatings Marine Chemical Research Institute Co.LtdQingdao 266072China Quzhou Research Institute Zhejiang UniversityQuzhou 324000China

Biofouling, which comprises the absorption of proteins and the adhesion of bacteria to the surface of living entities, is a severe concern for the maritime sector since it ultimately leads to hydrodynamic drag,resulting in a higher increase in fuel consumption. As a result, polymer resins are crucial in the marine sector for anti-biofouling coatings. In this work, the poly(caprolactone-ethylene glycol-caprolactone)-p olyurethane(PECL-PU) are prepared through ε-caprolactone(CL), poly(ethylene glycol)(PEG), 4,4'-methylene bis(cyclohexyl isocyanate) and 1,4 butanediol. Our study demonstrate that the PECL-PU copolymer degraded in artificial seawater(5.21%), enzymatic solution(12.63%), and seawater(13.75%)due to the presence of PEG segments in the laboratory-based test under static condition. Because the addition of PEG segments are increased the polymer's amorphous area and decreased the crystallization of the polycaprolactone(PCL) in the copolymer, as demonstrated by differential scanning calorimetry, X-ray diffraction, and water contact angle studies. Therefore, the hydrolysis rates of PECL-PU were higher than the caprolactone-co-polyurethane(CL-PU). The antifouling test showed that PECL-PU3 copolymer had about 90.29% protein resistance, 85.2% Escherichia coli(E. coli) reduction and 94.61% marine diatom Navicula incerta reduction comparison to the control. We have developed an eco-friendly and inexpensive promising degradable polyurethane for reduction of bacterial biofilm, which can preserve the formation of biofouling on marine coating under practical sea conditions.

关键词： Caprolactone PEG segments Biodegradable polyurethane Biofouling Hydrolytic degradation

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CNR:A Cluster-Based Solution for Connectivity Restoration for Mobile WSNs

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Computers, Materials & Continua 2021年第12期69卷 3413-3427页

作者： Mahmood ul Hassan amin Al-Awady Khalid Mahmood Shahzad Ali Ibrahim Algamdi Muhammad Kashif Saeed Safdar Zaman Department of Computer Skills Najran UniversityNajran66241Saudi Arabia Department of Information Systems College of Science and ArtsKing Khalid UniversityMahayil Asir63317Saudi Arabia Department of Computer Science Jouf UniversityTabarjal76769Saudi Arabia Department of Computer Science Community College Mahayil AsirKing Khalid UniversityMahayil63317Saudi Arabia Federal Directorate of Education Department of Computer ScienceIslamabad44000Pakistan

Wireless Sensor Networks(WSNs)are an integral part of the Internet of Things(IoT)and are widely used in a plethora of ***,sensor networks operate in harsh environments where human intervention is often restricted,which makes battery replacement for sensor nodes *** failure due to battery drainage or harsh environmental conditions poses serious challenges to the connectivity of the *** a connectivity restoration mechanism,node failures ultimately lead to a network partition,which affects the basic function of the sensor ***,the research community actively concentrates on addressing and solving the challenges associated with connectivity restoration in sensor *** energy is a scarce resource in sensor networks,it becomes the focus of research,and researchers strive to propose new solutions that are energy *** common issue that is well studied and considered is how to increase the network’s life span by solving the node failure problem and achieving efficient energy *** paper introduces a Clusterbased Node Recovery(CNR)connectivity restoration mechanism based on the concept of *** is a well-known mechanism in sensor networks,and it is known for its energy-efficient operation and *** proposed technique utilizes a distributed cluster-based approach to identify the failed nodes,while Cluster Heads(CHs)play a significant role in the restoration of *** simulations were conducted to evaluate the performance of the proposed technique and compare it with the existing *** simulation results show that the proposed technique efficiently addresses node failure and restores connectivity by moving fewer nodes than other existing connectivity restoration *** proposed mechanism also yields an improved field coverage as well as a lesser number of packets exchanged as compared to existing state-of-the-art mechanisms.

关键词： WSNs CHs CNR transmission range connectivity restoration node failure cluster communication range

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An Efficient Connectivity Restoration Technique(ECRT)for Wireless Sensor Network

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Computers, Materials & Continua 2021年第10期69卷 1003-1019页

作者： Mahmood ul Hassan Shahzad Ali Khalid Mahmood Muhammad Kashif Saeed amin Al-Awady Kamran Javed Ansar Munir Shah Department of Computer Skills Preparatory yearNajran UniversityNajran66241Saudi Arabia Department of Computer Science Jouf UniversityTubarjal74769Saudi Arabia Department of Information Systems College of Science and ArtsKing Khalid UniversityMahayil Asir63317Saudi Arabia Department of Computer Science Community College Mahayil AsirKing Khalid UniversityMahayil63718Saudi Arabia Department of Computer Engineering National University of Technology(NUTECH)Islamabad44000Pakistan Department of Computer Science Institute of Southern PunjabMultan60000Pakistan

Node failure in Wireless Sensor Networks(WSNs)is a fundamental problem because WSNs operate in hostile *** failure of nodes leads to network partitioning that may compromise the basic operation of the sensor *** deal with such situations,a rapid recovery mechanism is required for restoring inter-node *** to the immense importance and need for a recovery mechanism,several different approaches are proposed in the ***,the proposed approaches have shortcomings because they do not focus on energy-efficient operation and coverage-aware mechanisms while performing connectivity ***,most of these approaches rely on the excessive mobility of nodes for restoration connectivity that affects both coverage and energy *** paper proposes a novel technique called ECRT(Efficient Connectivity Restoration Technique).This technique is capable of restoring connectivity due to single and multiple node *** achieves energy efficiency by transmitting a minimal number of control *** is also coverage-aware as it relocates minimal nodes while trying to restore *** the help of extensive simulations,it is proven that ECRT is effective in connectivity restoration for single and multiple node *** also show that ECRT exchanges a much smaller number of packets than other ***,it also yields the least reduction in field coverage,proving its versatility for connectivity restoration.

关键词： Cut-vertex failure recovery network connectivity node relocation wireless sensor network node failures

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Stock Market Index Prediction Using Machine Learning and Deep Learning Techniques

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Intelligent Automation & Soft Computing 2023年第8期37卷 1325-1344页

作者： Abdus Saboor Arif Hussain Bless Lord Y。Agbley amin ul Haq Jian Ping Li Rajesh Kumar Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China Abdul Wali Khan University Mardan Mardan23200Pakistan School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China Brain Institute Peshawar Peshawar25130Pakistan

Stock market forecasting has drawn interest from both economists and computer scientists as a classic yet difficult *** the objective of constructing an effective prediction model,both linear and machine learning tools have been investigated for the past couple of *** recent years,recurrent neural networks(RNNs)have been observed to perform well on tasks involving sequence-based data in many research *** this motivation,we investigated the performance of long-short term memory(LSTM)and gated recurrent units(GRU)and their combination with the attention mechanism;LSTM+Attention,GRU+Attention,and LSTM+GRU+*** methods were evaluated with stock data from three different stock indices:the KSE 100 index,the DSE 30 index,and the BSE *** results were compared to other machine learning models such as support vector regression,random forest,and k-nearest *** best results for the three datasets were obtained by the RNN-based models combined with the attention *** performances of the RNN and attention-based models are higher and would be more effective for applications in the business industry.

关键词： Machine learning deep learning stock market prediction data analysis

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Negotiation Based Combinatorial Double Auction Mechanism in Cloud Computing

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Computers, Materials & Continua 2021年第11期69卷 2123-2140页

作者： Zakir ullah Asif Umer Mahdi Zaree Jamil Ahmad Faisal Alanazi Noor ul amin Arif Iqbal Umar Ali Imran Jehangiri Muhammad Adnan Department of Information Technology Hazara University MansehraMansehra21300Pakistan Tecnologico de Monterrey School of Engineering and SciencesZapopan45201Mexico Prince Sattam bin Abdulaziz University College of EngineeringDepartment of Electrical EngineeringAlkharj16273Saudi Arabia

Cloud computing is a demanding business platform for services related to the field of *** goal of cloud customers is to access resources at a sustainable price,while the goal of cloud suppliers is to maximize their services ***,the customers would bid for every single resource type,which was a limitation of cloud resources *** solve these issues,researchers have focused on a combinatorial auction in which the resources are offered by the providers in bundles so that the user bids for their required ***,in this allocation mechanism,some drawbacks need to be tackled,such as due to the lower average bid price the users are dropped from the auction *** solve this problem,we proposed a“Negotiation based Combinatorial Double Auction Mechanism for Resource Allocation(N-CDARA)in cloud computing”.The proposed method negotiates with dropped *** average bid price users are asked by our proposed mechanism to increase their bids,as by the quoted bids they will be dropped by the *** of the users that are close to winning accept the proposal and increase their bid *** proposed mechanism is implemented in a CloudSim simulation *** are compared with the latest model and performance study shows that in our proposed scheme more users win and get their requested services and the utilization of offered services is increased up to 18.4%than the existing schemes.

关键词： Cloud computing combinatorial double auction negotiation resource utilization users serve

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A Hierarchal Clustered Based Proactive Caching in NDN-Based Vehicular Network

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Computer Systems Science & Engineering 2023年第10期47卷 1185-1208页

作者： Muhammad Yasir Khan Muhammad Adnan Jawaid Iqbal Noor ul amin Byeong-Hee Roh Jehad Ali Department of Computer Science&Information Technology Hazara University Mansehra21120Pakistan Department of Electronics Engineering Kookmin University Seoul Korea Faculty of Computing Riphah International University Islamabad Pakistan Department of AI Convergence Network Ajou UniversitySuwon16499Korea

An Information-Centric Network(ICN)provides a promising paradigm for the upcoming internet architecture,which will struggle with steady growth in data and changes in *** ICN architectures have been designed,including Named Data Networking(NDN),which is designed around content delivery instead of *** data is the central part of the ***,NDN was developed to get rid of the dependency on IP addresses and provide content *** is one of the major research dimensions for this upcoming internet *** research has been carried out to solve the mobility issues,but it still has problems like handover delay and packet loss ratio during real-time video streaming in the case of consumer and producer *** solve this issue,an efficient hierarchical Cluster Base Proactive Caching for Device Mobility Management(CB-PC-DMM)in NDN Vehicular Networks(NDN-VN)is proposed,through which the consumer receives the contents proactively after handover during the mobility of the *** a consumer moves to the next destination,a handover interest is sent to the connected router,then the router multicasts the consumer’s desired data packet to the next hop of neighboring ***,once the handover process is completed,consumers can easily get the content to the newly connected router.A CB-PCDMM in NDN-VN is proposed that improves the packet delivery ratio and reduces the handover delay aswell as cluster ***,the intra and inter-domain handover handling procedures in CB-PC-DMM for NDN-VN have been *** the validation of our proposed scheme,MATLAB simulations are *** simulation results show that our proposed scheme reduces the handover delay and increases the consumer’s interest satisfaction *** proposed scheme is compared with the existing stateof-the-art schemes,and the total percentage of handover delays is decreased by up to 0.1632%,0.3267%,2.3437%,2.3255%,and 3.7313%at the mobil

关键词： Vehicular network named data networking caching hierarchical architecture

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Surgical management of complicated hydatid cysts of the liver

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World Journal of Gastrointestinal Surgery 2010年第3期2卷 78-84页

作者： Ajaz A Malik Shams ul Bari Ruquia amin Masooda Jan Department of Surgery Sheri Kashmir Institute of Medical Sciences SouraSrinagarKashmir 190006India Department of General Surgery Sheri Kashmir Institute of Medical SciencesMedical College BeminaSrinagarKashmir 190006India Department of Social and Preventive Medicine Sheri Kashmir Institute of Medical SciencesSrinagarKashmir 190006India Department of Social and Preventive Medicine Government Medical College SrinagarKashmir 190006India

AIM: To review the clinical presentation and surgical management of complicated hydatid cysts of the liver and to assess whether conservative surgery is adequate in the management of complicated hydatid cysts of ***:The study was carried out at Sher-i-Kashmir Institute of Medical Science,Srinagar,Kashmir,*** nine patients with hydatid disease of the liver were surgically managed from April 2004 to October 2005 with a follow up period of three *** included 27 men and 42 women with a median age of 35 *** abdominal ultrasound,computed tomography and serology established *** with jaundice and high suspicion of intrabiliary rupture were subjected to preoperative endoscopic retrograde *** with infection,rupture into the biliary tract and peritoneal cavity were categorized as complicated *** patients(26%)had complicated cysts and formed the basis for this ***:Common complications were infection(14%),intrabiliary rupture(9%)and intraperitoneal rupture(3%).All the patients with infected cysts presented with pain and *** the patients with intrabiliary rupture had jaundice,while only four with intrabiliary rupture had pain and only two had *** procedures performed in complicated cysts were:infection-omentoplasty in three and external drainage in seven;intrabiliary rupture-omentoplasty in two and internal drainage in four *** patients with intraperitoneal rupture underwent external *** was no *** postoperative morbidity was 50%in complicated cysts and 16%in uncomplicated ***:Complicated hydatid cyst of the liver can be successfully managed surgically with good long term results.

关键词： Liver hydatid disease Complicated liver hydatid Drainage Operative techniques

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Impact of antenna and beam-selection-based sectored relay planning for 備 performance evaluation of 4G LTE-A tri-sectored cell

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Digital Communications and Networks 2019年第2期5卷 121-130页

作者： Javaid A. Sheikh Mehboob-ul- amin Shabir A. Parah G. Mohiuddin Bhat Post Graduate Department of Electronics and I.T. University of KashmirSrinagarIndia

The deployment of Relay Nodes (RNs) in 4G LTE-A networks, mainly originating from the wireless backhaul link, provides an excellent network planning tool to enhance system performance. Better coordination between the base station and relays to mitigate inter-cell interference becomes an important aspect of achieving the required system performance, not only in the single-cell scenario, but also in multi-cell scenarios. In this paper, we model and analyze two basic approaches for designing a 4G LTE-A tri-sectored cellular system. The approaches are based on Antenna Selection Sectored Relaying (ASSR) and Beam Selection Sectored Relaying (BSSR). The main purpose of the proposed schemes is to enhance system performance by improving the quality of the wireless relay backhaul link. In this technique, antenna selection takes into consideration Non-Line-Of-Sight (NLOS) communication, whereas BSSR considers the case of Line-Of-Sight (LOS) communication using heuristic beam forming approach. The resource allocation problem has also been investigated for relay based cooperative LTE-A trisectored cell in the downlink. The best possible location for relay node in the sector, power allocation and MIMO channel modeling is formulated as an optimization problem with the aim of maximizing the end to end link rate and the Signal to Interference plus Noise Ratio (SINR) of 4G LTE-A systems. Power allocation/optimization has been solved by means of the duality equation of the stationary Karush-Kuhn-Tucker (KKT) cond让ion and is used to derive optimal values for the beam forming vector on both the relay as well as the access link. The performance of the proposed scheme is verified through simulations carried out using MATLAB software. The simulation results show a significant improvement in the SINR, throughput capacity, and coverage area of the 4G LTE-A cell, while guaranteeing better quality of service.

关键词： Long Term Evolution-Advanced (LTE-A) Relay Node (RN) Sectored Relaying (SR) Antenna Selection Sectored Relaying (ASSR) Beam Selection Sectored Relaying (BSSR) Karush-Kuhn-Tucker (KKT)

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Partial Fusion (F) Gene Analysis of Newcastle Disease Virus Detected in Pakistan during 2021-2022

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Journal of Biosciences and Medicines 2024年第5期12卷 256-275页

作者： Muhammad Danish Mehmood Huma Anwar ul-Haq Rauf Khalid Yasir amin Muhammad Usman Ghani Muhammad Ismail Rabia Habib Fareeha Arshed Abdul Rasheed Shaukat Institute of Molecular Biology & Biotechnology University of Lahore Lahore Pakistan Research & Development Division Ottoman Pharma Lahore Pakistan Quality Assurance Department Ottoman Pharma Lahore Pakistan Veterinary Research and Disease Investigation Center Abbottabad Pakistan Quality Control Department Ottoman Pharma Immuno Lahore Pakistan Production Department Ottoman Pharma Lahore Pakistan Poultry Production Department Sabir&#8217s Poultry Pvt. Ltd. Sabroso Pakistan

Newcastle disease (ND) virus is a leading threat to commercial and domestic poultry in Pakistan. The virus infects and constitutes irreversible impairment to the nervous system, damages the respiratory system, and marks severe gastrointestinal lesions leading to heavy mortality in short-living birds and substantial losses in layers and breeders. The continuous emergence and evolution of the virus made it inclined to evade the humoral response and indirectly the circumvention of artificial active immunization. Newcastle disease is caused by the orthoavula genus of the paramyxoviridae family and has shown high genetic diversity even in their genotypes while information regarding enzootic trends of the virus is scanty in Pakistan. A total of 40 tracheal samples of NDV were collected from different commercial broiler farms and 11 isolates of NDV were identified. In the current study, we determined the genetic diversity of the Newcastle disease virus based on the partial sequencing of the fusion protein gene available in the NCBI database. Genetic analysis showed that seven isolates belonged to class I genotype VII and four belonged to class II genotype II. Interestingly, two isolates had epidemiological connections with vaccine-like class II genotype II. Our findings, concerning the recent outbreaks of class I genotype VII and class II genotype II of NDV in vaccinated commercial flocks, suggest possible potential partial mutations in the fusion protein gene. Genetic diversity and formation of the new cleavage site in an important neutralizing protein of wild strain are linked with the potency of artificial active immunization and a major cause of vaccine failure.

关键词： Newcastle Disease Virus Haemagglutination Inhibition Polymerase Chain Reaction Phylogenetic Tree Mutation Analysis

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Spatial and Temporal Variation of Particulate Matter (PM10 and PM2.5) and Its Health Effects during the Haze Event in Malaysia

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Journal of Atmospheric Science Research 2023年第4期6卷 26-47页

作者： Afiqah Ma’amor Norazian Mohamed Noor Izzati Amani Mohd Jafri Nur Alis Addiena Ahmad Zia ul Saufie Nor Azrita amin Madalina Boboc Gyorgy Deak Faculty of Civil Engineering&Technology Universiti Malaysia PerlisJejawiArauPerlis02600Malaysia Sustainable Environment Research Group(SERG) Centre of Excellence Geopolymer and Technology(CEGeoGTech)JejawiArauPerlis02600Malaysia Faculty of Computer and Mathematical Sciences Universiti Teknologi Mara(UiTM)Shah Alam40450Malaysia Institute of Engineering Mathematics Universiti Malaysia PerlisPauh Putra CampusArauPerlis02600Malaysia National Institute for Research and Development in Environmental Protection INCDPM Splaiul Independentei 294Bucharest060031Romania

This study aims to assess and compare levels of particulate matter(PM10 and PM2.5)in urban and industrial areas in Malaysia during haze episodes,which typically occur in the south west monsoon *** high concentrations of atmospheric particles are mainly due to pollution from neighbouring *** PM concentrations were analysed for urban and industrial areas including Alor Setar,Tasek,Shah Alam,Klang,Bandaraya Melaka,Larkin,Balok Baru,and Kuala Terengganu in 2018 and *** analysis employed spatiotemporal to examine how PM levels were *** data summary revealed that PM levels in all study areas were right-skewed,indicating the occurrence of high particulate *** peaks in PM concentrations during haze events were consistently observed between June and October,encompassing the south west monsoon and inter-monsoon *** study on acute respiratory illnesses primarily focused on *** revealed that Klang had the highest mean number of inpatient cases for acute exacerbation of bronchial asthma(AEBA)and acute exacerbation of chronic obstructive pulmonary disease(AECOPD)with values of 260.500 and 185.170,***,for outpatient cases of AEBA and AECOPD,Klang had the highest average values of 41.67 and 14.00,*** Alam and Sungai Buloh did not show a significant increase in cases during periods of biomass *** statistical analysis concluded that higher concentrations of PM were associated with increased hospital admissions,particularly from June to September,as shown in the bar *** episodes were associated with more healthcare utilization due to haze-related respiratory illnesses,seen in higher inpatient and outpatient visits(p<0.05).However,seasonal variability had minimal impact on healthcare *** findings offer a comprehensive assessment of PM levels during historic haze episodes,providing valuable insights for authorities to develop policies and guidelines fo

关键词： Haze Particulate matter(PM10 and PM2.5) AEBA and AECOPD Spatial variability

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