Review
Geriatrics & Gerontology
Asma Braham Chaouche, Maryam Rezaei, Daphne Silvestre, Angelo Arleo, Remy Allard
Summary: Age-related decline in visual perception is often attributed to optical and neural factors, with the detection of light by cones being a crucial step in vision. A novel functional approach can evaluate various aspects of the visual system, including the detection of photons by cones, providing insights into the underlying causes of age-related visual decline.
FRONTIERS IN AGING NEUROSCIENCE
(2021)
Article
Chemistry, Analytical
Joseph Biagio McLaughlin, Giacomo Gallina, Fabrice Retiere, Austin De St Croix, Pietro Giampa, Mahsa Mahtab, Peter Margetak, Lars Martin, Nicolas Massacret, Jocelyn Monroe, Mayur Patel, Kurtis Raymond, Jolie Roiseux, Liang Xie, Guoqing Zhang
Summary: This study focuses on the photon emission of Silicon Photomultipliers (SiPMs) under dark conditions, using spectral and imaging analysis to investigate the light emission characteristics of different SiPM devices. The results show variations in secondary photon yield and emission spectra among different SiPMs, providing valuable information for the systematic design of next-generation large area SiPM applications in physics experiments.
Article
Radiology, Nuclear Medicine & Medical Imaging
Liqiang Ren, Yuxin Sun, Benjamin Yeh, Jeffrey F. Marsh, Timothy N. Winfree, Kristin A. Burke, Kishore Rajendran, Cynthia H. Mccollough, Achille Mileto, Joel G. Fletcher, Shuai Leng
Summary: This study evaluated the performances of dark borosilicate contrast media (DBCM) using single- and multi-energy CT imaging on a clinical photon-counting-detector CT (PCD-CT) system. The results showed that DBCM had stable CT numbers, while iodine contrast agent had decreased CT numbers. DBCM had higher contrast-to-noise ratio compared to water. Therefore, DBCM has potential feasibility in abdominal CT applications.
Article
Physics, Multidisciplinary
Ali Barkhordari, Suleyman Ozcelik, Semsettin Altmdal, Gholamreza Pirgholi-Givi, Hamidreza Mashayekhi, Yashar Azizian-Kalandaragh
Summary: This paper examines the influence of doping barium titanate in the polyvinyl pyrrolidine polymer sandwiched between the metal-semiconductor on the conduction mechanism and electrical properties of the formed diode. The electrical parameters of the diodes were calculated and compared using different methods. The results show that the PVP: BaTiO3 interlayer can be a suitable alternative replacement of intrinsic interlayer for utilization in nanoscale electronic and optoelectronic devices and circuits.
Article
Chemistry, Physical
Ali Barkhordari, Suleyman Ozcelik, Gholamreza Pirgholi-Givi, Hamid Reza Mashayekhi, Semsettin Altindal, Yashar Azizian-Kalandaragh
Summary: A polyvinyl pyrrolidine (PVP) polymer layer doped with barium titanate (BaTiO3) nanostructures was prepared as an interfacial layer for fabricating a metal-semiconductor-metal (MPS) diode. Experimental results showed that the inserted layer significantly increased the dielectric constant of MPS and enhanced the electrical conductivity by reducing interfacial polarization.
Article
Neurosciences
Vahid Salari, Serafim Rodrigues, Erhan Saglamyurek, Christoph Simon, Daniel Oblak
Summary: This paper explores the feasibility of a novel brain-computer interface (BCI) idea that utilizes ultraweak light emission from neurons and proposes a skull implant BCI using photonics technology. The potential impact of this technology, if successfully implemented in the future, is discussed in terms of its controversial aspects, technological feasibility, and limitations.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ali Barkhordari, Saeed Karimian, Antonio Rodero, Dorota Anna Krawczyk, Seyed Iman Mirzaei, Amir Falahat
Summary: This research presents the development of a new plasma reactor for CO2 decomposition at atmospheric pressure using AC power, with higher conversion rates than existing plasma sources. Through experiments and simulations, the study provides detailed insights into the main mechanisms of CO2 splitting, showcasing the potential of high voltage electrical discharges for this purpose. The use of gas chromatography and optical emission spectroscopy enabled the calculation of CO2 conversion rates and energy efficiency, while also determining the electron density and temperatures within the plasma.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Ali Barkhordari, Seyed Iman Mirzaei, Amir Falahat, Dorota A. Krawczyk, Antonio Rodero
Summary: In this study, a new plasma reactor operating with a butane/propane gaseous mixture was experimentally investigated for hydrogen molecule production. Gas Chromatography and optical emission spectroscopy were applied to analyze the LPG conversion process and the plasma conditions optimization for H-2 formation.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Ali Barkhordari, Semsettin Altindal, Gholamreza Pirgholi-Givi, Hamidreza Mashayekhi, Suleyman Ozcelik, Yashar Azizian-Kalandaragh
Summary: This study investigates the impact of PVC and SnS-doped PVC interfacial layers on the performance of Schottky barrier diodes (SBDs). The results show that these layers can improve the electrical features of the devices and a negative capacitance/dielectric phenomenon is observed at low frequencies.
Article
Physics, Applied
Tasio Gonzalez-Raya, Mateo Casariego, Florian Fesquet, Michael Renger, Vahid Salari, Mikko Mottonen, Yasser Omar, Frank Deppe, Kirill G. Fedorov, Mikel Sanz
Summary: Microwave technology plays a crucial role in wireless communications, and understanding its limitations in realistic open-air settings is important for its development. This study investigates the feasibility of open-air entanglement distribution with microwave two-mode squeezed states and explores techniques to improve quantum correlations and increase the reach of entanglement.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Ali Barkhordari, Hamidreza Mashayekhi, Pari Amiri, Semsettin Altindal, Yashar Azizian-Kalandaragh
Summary: In order to enhance the performance of metal-semiconductor (MS) structure, MS and pure polyvinyl-pyrrolidine (PVP), Gr, (ZnTiO3) and (Gr-ZnTiO3)-doped PVP interlayer were synthesized and characterized on p-Si substrate. Impedance measurements were conducted on these samples in the frequency range of 100 Hz-1 MHz at 1.5 V. The results showed that the electrical properties were strongly dependent on frequency due to factors such as surface states, relaxation time, series resistance, interlayer, and surface/dipole polarization. The use of doped PVP interlayers increased the energy storage capacity and reduced energy losses.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Neurosciences
Tahereh Esmaeilpour, Azam Lotfealian, Morteza Anvari, Mohammadreza Namavar, Narges Karbalaei, Abbas Shahedi, Istvan Bokkon, Vahid Salari, Daniel Oblak
Summary: All living cells produce ultra-weak photon emission (UPE) during biological activity, including neurons in the brain. The intensity of UPE can be influenced by various internal and external factors. This study examines the effects of Methamphetamine (METH) on UPE and reactive oxygen species (ROS) levels in the prefrontal, motor, and visual cortex. The results indicate that METH increases UPE and ROS in all three areas, suggesting a direct relationship between UPE intensity and ROS production. These findings have implications for monitoring oxidative metabolism and researching METH.
NEUROSCIENCE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Ali Barkhordari, Hamid Reza Mashayekhi, Pari Amiri, Semsettin Altindal, Yashar Azizian-Kalandaragh
Summary: In this study, a metal-polymer-semiconductor (MPS) structure or Schottky diode (SD) is fabricated by inserting a polyvinyl pyrrolidine (PVP) polymer layer between the metal-semiconductor (MS) structure. Zinc titanate and graphene nanostructures are individually and collectively doped into the PVP layer to enhance the electrical performance of the MPS-type SD. Various characterization techniques are used to examine the properties of the ZnTiO3 nanostructures. The electrical parameters of the SDs are determined using different models and the conduction mechanisms are analyzed. The results show that doping graphene into the PVP interlayer increases the electrical conduction, while the PVP:Gr-ZnTiO3 polymer layer improves the rectifying ratio of the SDs.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Vahid Salari, Dilip Paneru, Erhan Saglamyurek, Milad Ghadimi, Moloud Abdar, Mohammadreza Rezaee, Mehdi Aslani, Shabir Barzanjeh, Ebrahim Karimi
Summary: Face recognition is a common application of pattern recognition in machine learning, and it has wide applications in security, access control, and law enforcement. Quantum algorithms have shown potential to improve the efficiency and complexity of face recognition process. In this study, we propose a quantum machine learning algorithm for pattern recognition based on quantum principal component analysis and quantum independent component analysis, and we also introduce a new quantum algorithm for finding dissimilarity in faces. Our fully quantum pattern recognition system with quantum inputs promises a much-improved image acquisition and identification system with potential applications beyond face recognition.
SCIENTIFIC REPORTS
(2023)
Article
Neurosciences
Fereshteh Arab, Sareh Rostami, Mohammad Dehghani-Habibabadi, Diego M. Mateos, Roisin Braddell, Felix Scholkmann, Mohammad Ismail Zibaii, Serafim Rodrigues, Vahid Salari, Mir-Shahram Safari
Summary: The present study investigates the effects of visual stimulation on the primary visual cortex under gamma oscillations. The results show that optogenetic stimulation enhances low gamma power in both layers of the visual cortex, while simultaneous visual stimulation has differing effects on the two layers, reducing gamma power in layer II and increasing it in layer IV.
NEUROSCIENCE LETTERS
(2023)
Review
Physics, Multidisciplinary
Mayte Y. Li-Gomez, Pablo Yepiz-Graciano, Taras Hrushevskyi, Omar Calderon-Losada, Erhan Saglamyurek, Dorilian Lopez-Mago, Vahid Salari, Trong Ngo, Alfred B. U'Ren, Shabir Barzanjeh
Summary: Quantum sensing exploits quantum phenomena to enhance the detection and estimation of classical parameters of physical systems and biological entities, particularly so as to overcome the inefficiencies of its classical counterparts. A particularly promising approach within quantum sensing is quantum optical coherence tomography which relies on nonclassical light sources to reconstruct the internal structure of multilayered materials. Compared to traditional classical probing, quantum optical coherence tomography provides enhanced-resolution images and is unaffected by even-order dispersion.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Optics
Sepideh Ahmadi, Erhan Saglamyurek, Shabir Barzanjeh, Vahid Salari
Summary: Quantum imaging techniques, utilizing entangled photon pairs, offer improved resolution, contrast, and precision at ultralow illumination levels compared to traditional approaches. Two standout techniques, correlation-based quantum imaging and interaction-free ghost imaging, enhance visibility of low-reflectivity objects and detect the presence of objects with minimal photon numbers, respectively. We propose a quantum imaging scheme that combines the advantages of these methods to achieve high-contrast imaging with minimal photons, minimizing thermal noise and generating background-free images. This approach holds potential for noninvasive and harm-free imaging of photosensitive biological tissues.
Article
Optics
Nahid Yazdi, Vahid Salari, Roohollah Ghobadi
Summary: In this paper, we study the coupling between three mechanical modes of a hBN membrane monolayer and an optically addressable spin defect via magnetic field interaction. We analyze the effect of this coupling on phonon-phonon interaction, stability, purity, and entanglement. Our results show that steady-state entanglement between different vibrational modes of hBN can be achieved in a wide range of experimental parameters. This study has the potential to enable scalability for universal quantum computation using continuous-variable cluster states.
