Search results for: Irfan Ahmed

Items from 1 to 20 out of 114 results

article

Improved corrosion resistance and cytotoxicity of nickel‐based alloy using novel plasma processing technique

Muhammad Yousaf, Tahir Iqbal, Muhammad Salim Mansha, Adnan Saeed, more

Plasma Processes and Polymers > 21 > 6 > n/a - n/a

In this study, we address challenges in the biocompatibility of nickel‐based (NiCr) alloys, prevalent in the dental industry, due to toxic metal ion release impacting corrosion resistance and cytotoxicity. Employing magnetron sputtering and cathodic cage plasma nitriding (CCPN), a duplex plasma treatment (DPT) is introduced to the NiCr alloy. The novel approach enhances surface morphology, notably...

article

One‐Step Generation of Energy‐Time‐Polarization‐Hyper‐Entangled W‐Class Triphotons: Nonlinear and Linear Optical Responses

Siqiang Zhang, Haitian Tang, Jiajia Wei, Jiaxuan Wei, more

Annalen der Physik > 535 > 11 > n/a - n/a

Nonclassical multiphoton have attracted extensive attention to serve as entangled resources for quantum information technology. Here, the continuous‐mode hyper‐entangled W‐class triphotons are theoretically generated through spontaneous six‐wave mixing (SSWM) in ⁸⁵Rb. In nonlinear optical response, Zeeman sub‐states are high‐dimensionally quantized by polarized dressing. High‐dimensional entanglement...

article

Impact of tractor wheels on physical properties of different soil types and the irrigation efficiency of the furrow irrigation method

Rahim Bux Vistro, Mashooque Ali Talpur, Irfan Ahmed Shaikh, Munir Ahmed Mangrio

Journal of Water and Land Development > 2022 > no. 52 > 166--171

In furrow irrigation, the maximum lateral movement of water in ridges is more desirable than the vertical downward movement. This can be achieved by compacting the furrows. Thus, the study examines the impact on furrow soil compaction by tractor wheel trafficking during mechanical operations in the different soil types. In this experiment, the three-wheel tractor compaction includes: 1) control (no...

article

Transition to sustainable development in the tanning industry: Evidence from leather value chain in Tamil Nadu, India

Bino Paul, Rahul Shaji, Unmesh Patnaik, Ashraf Pulikkamath, more

Sustainable Development > 31 > 4 > 2938 - 2949

The Sustainable Development Goals (SDGs), while balancing the three dimensions of sustainability, are latent about the pathways to achieve it. The transition may involve trade‐offs between the different dimensions of sustainable development, like balancing the socio‐economic dimension with environmental limits. The paper attempts to demonstrate some of these channels for the leather value chain in...

article

Lithium in breast milk transiently affects the renal electrolytic balance of infants

Irfan Ahmed, Muhammad Shehzad Khan, Victor Ma, Hina Magsi, more

Bipolar Disorders > 25 > 1 > 56 - 65

Background The use of lithium during breast‐feeding has not been comprehensively investigated in humans due to concerns about lithium toxicity. Procedure We analyzed lithium in the kidneys of nursed pups of lithium medicated mothers, using analytical spectroscopy in a novel rat model. The mothers were healthy rats administered lithium via gavage (1000 mg/day Li₂CO₃ per 50 kg body weight). Results...

article

Ti atom doped single vacancy silicene for hydrogen energy storage: DFT study

Basheer Ahmed Kalwar, Wang Fangzong, Irfan Ahmed, Muhammad Hammad Saeed

Journal of the Chinese Chemical Society > 68 > 12 > 2243 - 2253

Hydrogen adsorption on titanium (Ti) atom doped single vacancy silicene (SV‐SL) is investigated through first principles density functional theory (DFT) study. Strong hybridization of d‐orbitals of Ti atom to p‐orbitals of Si atoms results in a tight bond to the silicene sheet with energy of −6.48 eV and keeps away from metal clustering. Maximum 8 H₂ molecules firmly bind to Ti atom doped SV‐SL sheet...

article

Microbial electrolysis cells and power‐to‐gas technology – A novel onsite industrial wastewater treatment and CCU arrangement

Irfan Ahmed Gondal

Water and Environment Journal > 35 > 4 > 1376 - 1383

Industrial development owes its pace to the continued supply of energy; however, this development is also associated with a consequent consumption of water, climate change and environmental degradation. The increased concentration of carbon in the atmosphere and the dwindling clean water resources are posing another potent challenge to the sustained industrial development. The intermittent nature...

article

Lithium from breast‐milk inhibits thyroid iodine uptake and hormone production, which are remedied by maternal iodine supplementation

Irfan Ahmed, Victor Ma, Yuanchao Liu, Muhammad Shehzad Khan, more

Bipolar Disorders > 23 > 6 > 615 - 625

Background Lithium is especially taken as a maintenance medication for Bipolar Disorder. In women with bipolar disorder, lithium is often effective during postpartum period, but breast‐feeding for medicated mothers is controversial because of harmful effects for her child. At present, the biological mechanisms of lithium are not well‐understood, affecting its usage and overall health implications...

article

Three‐Mode Squeezing of Simultaneous and Ordinal Cascaded Four‐Wave Mixing Processes in Rubidium Vapor

Wei Li, Changbiao Li, Mengqi Niu, Binshuo Luo, more

Annalen der Physik > 533 > 4 > n/a - n/a

Multipartite quantum correlation plays a vital role in potential applications of quantum technologies. In this paper, using energy‐level cascaded four‐wave mixing (EC‐FWM) process, a scheme to produce quantum correlated three‐mode light beams within a single device of hot atomic medium of rubidium is proposed. Two‐ and three‐mode amplitude, phase quadrature squeezing and intensity difference squeezing...

article

Heart failure‐related hospitalisation and management during the COVID‐19 pandemic: a reflection. Letter regarding the article ‘The impact of COVID‐19 on heart failure hospitalization and management: report from a Heart Failure Unit in London during the peak of the pandemic’

Nisa Shah, Irfan Ahmed, Tahir Nazir

European Journal of Heart Failure > 23 > 2 > 343 - 344

article

Economic impact of monetary policy: Focus on real estate sector in Italy

Irfan Ahmed, Claudio Socci, Ali Medabesh, Francesca Severini, more

International Journal of Finance & Economics > 26 > 1 > 1256 - 1269

This study investigates the nexus between financial market and real estate (RE) sector against the backdrop of ECB's unconventional monetary policy. A financial dynamic computable general equilibrium (DCGE) model is calibrated on the financial social accounting matrix (FSAM) of Italian economy. The findings confirm that the inclusion of financial intermediation into real economy affects the real estate...

article

Genuine Quadripartite Continuous‐Variable Entanglement in Symmetric Cascaded Four‐Wave Mixing Process

Da Zhang, Irfan Ahmed, Changbiao Li, Yanpeng Zhang

Annalen der Physik > 533 > 2 > n/a - n/a

The symmetric cascaded four‐wave mixing process is a phase‐insensitive and easy‐to‐implement technology to prepare quadripartite entanglement. However, it has not yet been discussed whether the state generated by this method is genuinely entangled. Here, it is shown that the genuine quadripartite entanglement criteria previously derived are not applicable to the symmetric cascaded scheme. Thus some...

article

Energy Efficiency in 5G Communications – Conventional to Machine Learning Approaches

Muhammad Khalil Shahid, Filmon Debretsion, Aman Eyob, Irfan Ahmed, more

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 1--9

Demand for wireless and mobile data is increasing along with development of virtual reality (VR), augmented reality (AR), mixed reality (MR), and extended reality (ER) applications. In order to handle ultra-high data exchange rates while offering low latency levels, fifth generation (5G) networks have been proposed. Energy efficiency is one of the key objectives of 5G networks. The notion is defined...

article

Thymoquinone attenuates IgE‐mediated allergic response via pi3k‐Akt‐NFκB pathway and upregulation of the Nrf2‐HO1 axis

Ayed Dera, Prasanna Rajagopalan, Irfan Ahmed, Mohammad Alfhili, more

Journal of Food Biochemistry > 44 > 6 > n/a - n/a

IgE‐dependent reactions mediate the majority of allergic diseases. This study explores the effects of thymoquinone (Tq) on IgE‐mediated allergic response in activated mast cells, basophils, and neutrophils. Tq treatment resulted in a dose‐dependent decrease in levels of TNF‐α and IL‐4 in activated RBL‐2H3 cells. Tq inhibited the degranulation of these cells with an IC₅₀ value of 56.37 µM. Moreover,...

article

Thymoquinone attenuates oxidative stress of kidney mitochondria and exerts nephroprotective effects in oxonic acid‐induced hyperuricemia rats

Ayed A. Dera, Prasanna Rajagopalan, Mohammad A. Alfhili, Irfan Ahmed, more

BioFactors > 46 > 2 > 292 - 300

Background Recent studies indicate hyperuricemia as an aggravating factor for kidney diseases progression. Basic research for novel agents to reduce hyperuricemia and kidney abnormalities will be highly rewarding. Herein, we report Thymoquinone (Tq) as an active constituent of Nigella sativa to have renal protective effective against oxonic acid (OA)‐induced hyperuricemia, hypertension, and renal...

article

Temporally Correlated Narrowband Biphoton Interference Based on Mach–Zehnder Interferometer

Da Zhang, Irfan Ahmed, Lin Hao, Yin Cai, more

Annalen der Physik > 531 > 12 > n/a - n/a

Since early 1990s, Mach–Zehnder interferometer has been used to investigate the interference of biphoton wave packets. Due to subpicosecond time coherence of biphoton generated by spontaneous parametric downconversion process, some physical processes are ignored in the interferometer, most likely the biphoton time‐domain interference. Here, the two‐photon interference phenomenon based on the Mach–Zehnder...

article

A forecasting tool for prediction of epileptic seizures using a machine learning approach

Fayas Asharindavida, M. Shamim Hossain, Azeemsha Thacham, Hedi Khammari, more

Concurrency and Computation: Practice and Experience > 32 > 1 > n/a - n/a

ECG and EEG signals are very helpful in the early diagnosis of epileptic seizures. The research focuses on analysis of ECG and EEG signals applying a deep learning technique to study early prediction of epileptic seizure. Signal processing methods like Empirical Mode Decomposition, spectral analysis, and statistical methods were used. The algorithms were implemented in MATLAB, and the EEG and ECG...

article

Generation of a Quadphoton via Seventh‐Order Nonlinear Susceptibility

Yuan Feng, Kangkang Li, Irfan Ahmed, Yameng Li, more

Annalen der Physik > 531 > 10 > n/a - n/a

With a wide range of potential applications, the generation of nonclassical multiphoton and number states has attracted renewed interest recently. Here, a correlated quadphoton with seventh‐order nonlinear susceptibility is reported in which all four photons are simultaneously created via an eight‐wave mixing (EWM) process in an atomic medium. The efficiency of the pure EWM process is low, which results...

article

Uplink coverage probability and spectral efficiency for downlink uplink decoupled dense heterogeneous cellular network using multi-slope path loss model

Sundus Ali, Muhammad Imran Aslam, Irfan Ahmed

Telecommunication Systems > 2019 > 72 > 4 > 505-516

Low powered node densification leading to dense and ultra dense heterogeneous networks is a feature of 5th generation cellular networks. With this densification, the nature of the link between the transmitter and receiver in the network requires even more accurate and reliable models. For performance analysis of such networks where the rates of signal loss over distance becomes a significant parameter,...

article

Ab-initio investigations on the physical properties of 3d and 5d transition metal atom substituted divacancy monolayer h-BN

Rafique Muhammad, Mohammad A. Uqaili, Yong Shuai, M.A. Mahar, more

Applied Surface Science > 2018 > 458 > C > 145-156

In present work, we show that, transition metal (TM) (i.e. 3d and 5d) atom substitution in di-vacancy (DV) h-BN layer can greatly modify its electronic, optical and magnetic behaviors through first-principles investigations based on density functional theory (DFT) method. In terms of electronic structures, it is predicted that 3d and 5d TM atom substitution converts wide bandgap insulating h-BN to...

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INFONA - science communication portal

Search results for: Irfan Ahmed

Improved corrosion resistance and cytotoxicity of nickel‐based alloy using novel plasma processing technique

One‐Step Generation of Energy‐Time‐Polarization‐Hyper‐Entangled W‐Class Triphotons: Nonlinear and Linear Optical Responses

Impact of tractor wheels on physical properties of different soil types and the irrigation efficiency of the furrow irrigation method

Transition to sustainable development in the tanning industry: Evidence from leather value chain in Tamil Nadu, India

Lithium in breast milk transiently affects the renal electrolytic balance of infants

Ti atom doped single vacancy silicene for hydrogen energy storage: DFT study

Microbial electrolysis cells and power‐to‐gas technology – A novel onsite industrial wastewater treatment and CCU arrangement

Lithium from breast‐milk inhibits thyroid iodine uptake and hormone production, which are remedied by maternal iodine supplementation

Three‐Mode Squeezing of Simultaneous and Ordinal Cascaded Four‐Wave Mixing Processes in Rubidium Vapor

Heart failure‐related hospitalisation and management during the COVID‐19 pandemic: a reflection. Letter regarding the article ‘The impact of COVID‐19 on heart failure hospitalization and management: report from a Heart Failure Unit in London during the peak of the pandemic’

Economic impact of monetary policy: Focus on real estate sector in Italy

Genuine Quadripartite Continuous‐Variable Entanglement in Symmetric Cascaded Four‐Wave Mixing Process

Energy Efficiency in 5G Communications – Conventional to Machine Learning Approaches

Thymoquinone attenuates IgE‐mediated allergic response via pi3k‐Akt‐NFκB pathway and upregulation of the Nrf2‐HO1 axis

Thymoquinone attenuates oxidative stress of kidney mitochondria and exerts nephroprotective effects in oxonic acid‐induced hyperuricemia rats

Temporally Correlated Narrowband Biphoton Interference Based on Mach–Zehnder Interferometer

A forecasting tool for prediction of epileptic seizures using a machine learning approach

Generation of a Quadphoton via Seventh‐Order Nonlinear Susceptibility

Uplink coverage probability and spectral efficiency for downlink uplink decoupled dense heterogeneous cellular network using multi-slope path loss model

Ab-initio investigations on the physical properties of 3d and 5d transition metal atom substituted divacancy monolayer h-BN

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