Program

Prof. Li Jun Yang

Title: Laser composite processing technology

Chair

Prof. Li Jun Yang

Harbin Institute of Technology, China

Abstract

Biography

Lijun Yang received the Ph.D degree in mechanical engineering from Harbin Institute of Technology, China in 2007. Now he is currently a full professor in Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education. His research interests are ultrafast laser micro-nano manufacturing, laser composite manufacturing and development of optical and mechanical integration equipment. He is the fellow of Chinese Society of Micro-Nano Technology, Chinese Society for Optical Engineering and Chinese Society of Astronautics. Over the past years, Prof. Yang has presided over the National Natural Science Foundation Project of China, the National High-tech R & D Program. National Key R & D Program of China and National Science and Technology Major Project. He has won the first prize of National Defense Science and Technology Progress Award. He also won the the second prize of Science and Technology Advance and Natural Science in Heilongjiang Province in 2014, 2015 and 2017 He has been authorized over 20 patents of invention of China and published more than 100 academic papers.

Prof. Arafa H Aly

Title: Photonic crystals umbrella for Thermal desalination: Simulation study

Keynote Talk

Prof. Arafa H Aly

Beni-Suef University, Egypt

Abstract

For sustainable water desalination, there is a worldwide push towards solar thermal desalination with the objective to limit the amount of consumed energy in other desalination technologies and maximize the resulting freshwater from saline water.  Here, we demonstrate a photonic crystals solar umbrella that covers the saline water surface, demanding to absorb all the incident electromagnetic wave and remit it as greater wavelengths in the range of mid-infrared (MIR) to be highly absorbed and localized close to the water surface. The temperature of the saline water with a refractive index of 1.3326 is reached to 45 °C  after one hour of illumination with the incident power intensity equal 680(w/m^2). Hence, by adding one-dimensional PCs the surface temperature is reached 77 °C. Also, by adding 2D PCs to allow the vapor to flow up through the pores of the structure with the diameter of the pore equal to 500 nm, the surface temperature is reached 87 °C.  Thus, the effective use of electromagnetic waves and warmth localization at the surface of saline water is accomplished by radiative coupling with the effect of 2D PCs. We design the considered structure by using COMSOL multiphysics which based on the finite element method (FEM). 

Biography

Arafa H.Aly has completed his PhD at the age of 35 years from Cairo University and postdoctoral studies from Soeul national university, Chonnam national university, ICTP, AUB, and Zaragoza University. He is the chairman of Eg-MRS which is the oldest scientific society in Egypt and Middle East. He has a distinguished 25-years career in material sciences and optical and acoustical applications. He has supervised for many master's and doctoral theses organized more than 40 conferences. He has published more than 150 papers in reputed journals and has been serving as an editorial board member of repute.

Prof. Niti Kant

Title: Efficient THz radiation generation in plasma

Keynote Talk

Prof. Niti Kant

Lovely Professional University, India

Abstract

Efficient THz radiation generation by frequency chirped pulse lasers in magnetized plasma is analysed. The beating of two laser pulses induces a ponderomotive force which drives a nonlinear current at beat frequency. This nonlinear current is responsible for THz radiation generation. The frequency chirp and magnetic field are crucial for efficient THz generation. The presence of magnetic field further provides the additional momentum to the THz photon to make the process resonant and hence, enhancement in the THz efficiency is observed. Our numerical simulations reveal that there is a significant enhancement in the THz field strength for optimized value of chirp parameter and magnetic field.

Biography

Dr. Niti Kant is a Professor at Department of Physics, Lovely Professional University, Phagwara, Punjab, India. He received Ph.D. degree in Plasma Physics from IIT Delhi in 2005. His research is focused on the areas of ultra-short intense laser interaction with plasmas and semiconductors, laser-plasma based accelerators, harmonic generations and THz radiation. He has supervised 26 PG and 7 Ph.D. students and published more than 80 research papers in various international SCI journals. He visited several countries e.g. UK, USA, Poland, South Korea, Egypt etc. and presented his research work at various international conferences/workshops. He is also a member of different renowned associations/societies e.g. OSI, PSSI, ISCA, IET, UKRI etc. Dr. Kant has been receiving Research Excellence and Research Appreciation Awards from Lovely Professional University since 2014 consecutively. He was also awarded with Best Researcher Award for 2020 by InSc and Science Father agencies.

Prof. Alain Celzard

Title: Interactions between light and moving particles in a fluid: liquid metamaterials and active matter

Keynote Talk

Prof. Alain Celzard

Université de Lorraine, France

Abstract

In this talk, we report some recent work on different effects produced by the interaction between particles suspended in a fluid and electromagnetic waves.

For example, we experimentally demonstrate the controllable transmission of an electromagnetic wave through a plasmonic liquid metacrystal in the optical frequency band. We also propose the design of fully dielectric isotropic micro- or nanoparticles which, when used as structural elements of a liquid metamaterial, can simultaneously provide negative effective electrical permittivity and negative magnetic permeability. 

We then consider the scattering of a plane electromagnetic wave on a cylindrically inhomogeneous distribution of meta-atoms in a liquid metamaterial. The inhomogeneity of the distribution that appears following the application of an electric potential means that the effective permittivity can become negative in a certain region of space, giving rise to effects such as resonant absorption, resonant scattering, which can be controlled in real time by modifying the applied electric potential and thus reorganising the liquid. 

Finally, if time permits, we will describe particles proposed as new active matter agents, self-propelled by magnetohydrodynamic acceleration of the surrounding fluid when resonantly excited by an electromagnetic wave.

Biography

Alain Celzard graduated in chemical physics in 1992 and received his PhD in materials science in 1995 in Nancy (France). Since 2005 he is full professor at ENSTIB engineering school (Epinal). In 2010 he was appointed Junior member of the Institut Universitaire de France. His scientific interests deal with disordered, porous and related materials, ranging from composites and nanoporous adsorbents to macroporous solids and disordered materials for catalytic, environmental, energy, or electromagnetic applications.

Prof. Souraya Goumri-Said

Title: Optoelectronic, mechanical, vibrational properties of triple perovskites Ba2K2Te2O9 and Ba2KNaTe2O9: Density functional theory

Invited Talk

Prof. Souraya Goumri-Said

Alfaisal University, Saudi Arabia

Abstract

We carried density functional theoretical (DFT) calculations to explore the electronic, optical, mechanical and vibrational properties of triple ordered perovskites Ba2K2Te2O9 and Ba2KNaTe2O9 by employing the Tran-Blaha modified Becke-Johnson as state-of-the-art exchange-correlation potential. The calculated electronic band structures show direct band gap showing a semiconductor nature. Total and partial densities of states peaks were analyzed in light of effective contributions of various electronic states. The significant optical parameters, including the components of dielectric constant, the energy loss function, the absorption coefficient, the reflectivity spectra, the refractive index and the extinction coefficient, were computed and discussed in details for radiation up to 12 eV. In order to check the mechanical and dynamic stabilities, we calculated the elastic constants and also phonons. Our present study might be considered as first theoretical quantitative calculations of the optical and electronic behavior in the cubic phase of triple perovskite materials based on Telluride. 

Biography

Born in Toulouse (France), Souraya Goumri-Said is associate professor of Physics at Alfaisal University (Riyadh, KSA). She received her PhD degree from the Bourgogne University in Dijon (France) on 2004. Souraya spent one year in Val de Marne University as temporary assistant professor then joined the condensed matter group in physics department of technical university of Kaisterslautern in Germany on 2005. From 2006 to 2010, she was awarded different research fellows in France and Belgium as postdoctoral and assistant professor at Maine University (Le Mans, France) from 2006 to 2008. Then she worked as researcher at Namur University (Belgium) from 2008 to 2010. Souraya worked and managed an industrial project within Arcelor Mital research and development department in collaboration with three universities in Wallonie region in Belgium. From July 2010, she was employed at KAUST University (Saudi Arabia) before joining Georgia Tech where she is working as research scientist within Prof. Jean-Luc Bredas group at the School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics. Her main area of research is density functional theory applied to material science and modeling the physical properties of functionalized materials such as perovskites, ceramics, carbides, nitrides, and materials for storage hydrogen. She also specializes in modeling optical, photonic devices and nanostructures for photovoltaic applications. Souraya is editor of open Physics (former the central European journal of physics,) within Dedegruyter edition since 2008. She edited her first book on 2006 about ab-initio methods applied to physical properties of semiconductors nitrides and perovskites. Souraya is author and co-author of more than 143 papers, 6 chapters and books with h-index=28. She joined the advisory Editorial Board of computational condensed matter journal at Elsevier.

Prof. Weiping Wu

Title: Optical metamaterials and their applications

Invited Talk

Prof. Weiping Wu

Chinese Academy of Sciences, China

Abstract

Metamaterials are artificial structures with specific electromagnetic properties. The physics and many concepts of metamaterials have been demonstrated in the microwave and terahertz range. By reducing the size of the periodic structures, e.g. using top down, or ultra-thin film, or two-dimensional (2D) materials, it is possible to create novel optical metamaterials. Depend on the designs, the material used and the refractive index of the media, the optical metamaterial show response in the visible or near infrared range. The wavelength, the Q-factor of the of the peaks can be tuned. Most optical metamaterial are based on metallic structures, it is also possible to use dielectric materials, semiconductor, semimetals to fabricate metamaterials. The emerging optical metamaterials can be used as sensors, light management, optical components, as well as ideal solar absorbers for solar cells and solar energy powered steam generation devices. 

Biography

Dr Weiping Wu is a Professor at Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences. He graduated with a bachelor’s degree in Material Science and Engineering at Shanghai Jiao Tong University in 2004. He received his Ph.D. in chemistry from the Institute of Chemistry, Chinese Academy of Sciences in 2010. From 2010 to 2013 he worked as a Research Associate at the University of Cambridge. He worked on optical metamaterials at the Optoelectronics Research Centre (ORC), the University of Southampton as a Research Fellow from 2013 to 2015. He took the George Daniels Lectureship at University of London in 2015 and worked in the UK till 2020. He has published more than 50 papers with total citations over 4000 and an h-index of 32. He was the chairman of Chinese UK Group of Society of Chemical Industry from 2015-2020. He is a member of the Royal Society of Chemistry (RSC) since 2012 and a Senior Member of OSA (The Optical Society) since 2020. He is one of the young observers of the International Union of Pure and Applied Chemistry (IUPAC) 47th Congress, 50th General Assembly and Centenary, Paris in 2019.

Dr. Sib Krishna Ghoshal

Title: Pulsed Laser Ablated Functional Nanostructures for Upcoming Biomedicine

Invited Talk

Dr. Sib Krishna Ghoshal

University Technology Malaysia, Malaysia

Abstract

Diverse bio-compatible nanostructures with customized optical and physiochemical characteristics became desirable for biomedicine applications. Lately, the contagious diseases due to widespread fatal pathogens, microbes, bacteria and viruses including the latest coronavirus together with ever-increasing diabetes, cardiac arrests and cancer ailments have caused severe global distress. To overcome these problems, different surface functionalized organic-inorganic nanomaterials have intensively been studied. In this regard, metal nanoparticles (MNPs)-integrated organic shell structures (SSs) became potential. Nanoparticles of Cu, Ag, Au, SiO2, TiO2 and ZnO due to their excellent chemical durability, environmental affability, strong surface reactivity, bio-compatibility, non-toxicity and low-cost are materialized as efficient nanomedicine agents. Repeated studies revealed that the overall attributes of these functional nanostructures strongly depend on the growth methods. However, the existing chemical and physical methods (viz. sputtering, chemical etching, mechanical milling, sol-gel, vapor deposition, spray pyrolysis,atomic or molecular condensation, nanoemulsion and reprecipitation) that are used to produce these MNPs-functionalized SSs have various limitations like the requirement of toxic chemicals, precursors, complicated processing conditions, poor scalability, undesirable effects, etc. Furthermore, achieving tinier nanostructures (size below 100 nm) with tailored properties is the main limitation of these growth techniques. These shortcomings can be overcome using the simple, cost-effective and eco-friendly nanosecond pulse laser ablation in liquid (PLAL) technique wherein the pure colloidal nanostructures at large-scale with tunable traits (structures, morphology, size, phase, bioactivity and so on) can be obtained by optimizing various laser parameters (energy, wavelength, repetition rate, pulse width, fluence, and liquid media), indicating their practical applications feasibility in pharmaceuticals and biomedicines. Based on these facts, we prepared different types of organic-inorganic nanohybrids using the versatile PLAL approach and characterized them via diverse analytical tools. Truly, the PLAL grown nontoxic and adaptable colloidal nanocomposites owing to their enhanced bioactivity and fluorescence properties were shown to destroy a wide spectrum of microorganisms compared to conventional synthetic drugs. To this end, this webinar intends to demonstrate the nanobiomedicine potency of the studied inorganic-organic nanohybrids in terms of their virucidal, bactericidal, antidiabetic, anticancer, antioxidant and antiaging traits. The proposed nanohybrids were established to be beneficial for future nanobiomedicine applications and food processing. The research and development in this area, still being in the infancy phase, will require dedicated efforts to get an in-depth understanding concerning the knowhow of these nanohybrids for the forthcoming drug formulations. 

Biography

Dr. Sib Krishna Ghoshal is currently Associate Professor of Physics at the Faculty of Science, University Technology Malaysiasince 2010.From2004-2010worked in the Physics Department and Materials Science Program of Addis Ababa University, Ethiopia, Africa as Associate Professor in the United Nations Development Program for the expansion of Graduate Studies. He served assenior lecturer and promoted asreader at Guru Jambheshwar University of Science and Technology, India during 1998-2006. He received PhD degree in Condensed Matter & Statistical Physicsin 1996 from School Physical Sciences, Jawaharlal Nehru University (Delhi, India). Carried out two post-doctoral researches one in Martin Fisher School of Physics (Brandeis University, USA) during 1999-2000 and the other in a joint research project of Indian Institute of Technology (Delhi) & Oxford University (UK) in 1996-1998. Supervised few Master Theseswith Nicola Marzari (MIT, USA)and worked with Sir Roger Elliotte (Oxford, UK), K. P. Jain (IITD), B. Chakraborty(Brandeis, USA)& S. Dattagupta (SPS, JNU). He receivedMasterDegreein Physics in 1989 from Premier Presidency University, CalcuttaandBSc (Physics Honors)degree in 1986 from Calcutta University.Besides having a long innings-spanning almost three decades in teaching Physics/Materials Sciences at various levels and advising an appreciable number of doctoral and masters theses, he possesses a remarkable research profile too. He published over 600research articles (339in Journals with total impact factor of 675), 15 book chapters, and 7books.His Google scholar h-index is 38, i10-index is 111and citations are 4840. So far, he received 55research grants, supervised 25PhD, 80MSc, and 65undergraduate thesesstudents. Heis listed as top 2% scientistsin physics worldwide in 2020.His recent research interests are in Advanced Optical Materials, Statistical Condensed Matter Physics, Nanomaterials Synthesesand Applicationsincluding NanoBioMedicice, Laser Physics, Simulation and Modeling as well as Nanoscience. One of his major concerns other than research pursuits is the social impact of science and technology on environment, marginalized societal groups deprived of higher education, and the imbalances thereupon in the distribution of its fruits and adverse impacts on these stakeholders.

Dr. Pradip Gatkine

Title: Astronomical spectrographs on a chip - Getting ready for the next-generation telescopes

Invited Talk

Dr. Pradip Gatkine

California Institute of Technology, USA

Abstract

Astrophotonics is the application of versatile photonic technologies to channel, manipulate, and disperse guided light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way. The photonic platform of guided light in fibers and waveguides has opened the doors to next-generation instrumentation for both ground- and space-based telescopes in optical and near/mid-IR bands, particularly for the large and extremely large telescopes (ELTs). Utilizing photonic advantage for astronomical spectroscopy is a promising approach to miniaturize the next generation of spectrometers for large telescopes and space-based telescopes. In this talk, I will discuss some of the recent results from our efforts to design and fabricate high-throughput on-chip spectrometers based on Arrayed Waveguide Gratings (AWG). These devices are ideally suited for capturing the AO-corrected light and enabling new and exciting science such as large-scale near-IR galaxy surveys to map the cosmic filaments or characterizing exoplanet atmospheres. I will also discuss specific approaches to make this technology science-ready for the ELT era.

 

Biography

Dr. Sangeetha Balabhadra

Title: Effect of Yb3+Ion Clustering on the enhancment of Upconversion Fluorescence

Invited Talk

Dr. Sangeetha Balabhadra

University of Canterbury, New Zealand

Abstract

Lanthanide ion (Ln3+) doped upconverting nanoparticles arecapable of converting low-energynear-infrared (NIR) photons intohigh-energy visible photons. This upconversion fluorescencehastremendous importance for a broad spectrum of applications inbio-imaging, drug delivery, theranostics, photovoltaics, securityand several applications in nanomedicine. Despitepromising applications in many technologically relevant areas, thecomparatively low upconversion fluorescence yield typically obtained,limits practical application of such materials. Nanoparticlesof varying size, dopant concentration, surface modifications,different host, and core/shell nanostructures have been explored toenhance the upconversion fluorescence quantum yield.However,investigations which relate thesevariables to the absorption and excitation spectraare not found in the literature. It is crucial tounderstand the absorption and excitation dynamics of the ofYb3+ions inupconverting nanoparticles to determine the optimumpump wavelength and to gain insight into the energy transferprocesses, which essentially govern the optical properties oflanthanide ion doped nanoparticles.This work gives an indepth viewof the pathways to improve the upconversion fluorescence in fluoride based nanoparticles.

Biography

Sangeetha Balabhadra has completed herPhD from the Department of Physics, University of Aveiro, Portugal. She has been working as a postdoctoral researcherinUniversity ofCanterbury, New Zealandsince 2018. She has published around 15 papers inreputed journals in the field of luminescence materials and it’sapplications

Yunxiang Yan

Title: Large-field integral field unit with 8064 fibers for FASOT

Invited Talk

Yunxiang Yan

Harbin Engineering University, China

Abstract

Integral filed unit (IFU) is a key component for three dimensional hyperspectral imaging in astronomy. IFU can support the combination of the data cube with two dimensional image and one dimensional spectra through a single exposure. The number of the fibers determines the spatial resolution and the filling ratio limits the coupling efficiency of light transmitting into the fibers. A pair of large-field IFUs with 8064 fibers is designed and developed for the Fiber Arrayed Solar Optical Telescope. The IFUs have two IFU heads with 4032 fibers in each to improve the fiber number density to achieve high spatial resolution. And the hexagon microlens array was attached on the IFU head to realize the high filling ratio of 100%. The FASOT will spilt the sun light into two orthogonal polarized beams to guide them into the two IFU heads. Two fiber cables connect the IFUs to 12 pseudo slits for 12 spectrographs. Then the FASOT can achieve three dimensional polarized Solar optical observation using the hyperspectral imaging technology with the IFUs. This paper will report on the design and the performance of the focal ratio degradation (FRD), the throughput and the alignment precision of the IFU.

Biography

Dr. Yan received hisPh.D. degree in National Astronomical Observatories (NAO)of Chinese Academy of Sciences (CAS) in 2018. From 2015-2018 he was a research assistant in the Center for Operation and Development of LAMOST Telescope. He is currently an Associate Professor of Physics at the College of Physics and Optoelectronic Engineering, Harbin Engineering University (HEU). He is the co-founder of the Advanced Photonics Institute (API, http://api.hrbeu.edu.cn) and the team leader of astrophotonicsgroup in API since 2019. In 2021 he joined the HEU Qingdao Innovation and Development Base as the laboratory sponsor of the Ocean Optics Engineering Technology Research Center.His research interests include the design and development of integral spectrograph systems for astronomical instrumentation, fiber-optic instrumentation, hyperspectral imaging, fiber interferometry, in-fiber integral optics, and image processing. His team has completed the project of developing a pair of large-field integral field units (IFUs) which has the highest fibernumber densitywith 8064 fibers (4032 fibers in each IFU head). The IFUs will be shifted to Yunnan Astronomical Observatories, CAS in this summer to be equipped on the Fiber Arrayed Solar Optical Telescope (FASOT). The FASOT can first achieve three dimensional polarized Solar optical observation using the hyperspectral imaging technology with IFUs. Now his team is investigating a new scrambling method using in-fiber integral technology to realize high scrambling gain with high coupling efficiency for stellar interferometry. And he is also engaged in the research of application of three dimensional hyperspectral imaging technology in ocean optics.

Mr. Giacomo Borraccini

Title: Autonomous QoT-Driven Power Control in Software-Defined Optical Networks

Invited Talk

Mr. Giacomo Borraccini

Politecnico di Torino, Italy

Abstract

Driven by the increasing and greedy Internet data traffic request, optical network operators are working to satisfy this need, improving the already installed resources, or updating them thanks to the introduction of new technological discoveries. In this context, the most relevant support for service capacity increase and system management is conferred by optical network automation, due to standardization and the consequent implementation of software-defined (SD) networks. Another important characteristic for an efficient usage of optical networks is the capability of the infrastructure to be agnostic with respect to the adopted vendor equipment, also favoring a more rapiddeployment and the integration of new functions. Definitely, this is allowed by hardware and software disaggregation, pushing in the direction of cognitive optical networks. Starting from the last decade, cognition has been introduced and theorized as an emerging feature of the next generation of optical networks. Cognition implies the autonomous and prompt control of a network at each abstraction layer operating decisions and strategies based on the processing of information related to the status of the system. The response to the increasing complexity of the infrastructure is given by the possibility to probe the condition of the network through monitoring devices and to efficiently analyze the extracted information using flexible software modules. In this scenario, telemetry and monitoring devices cover a fundamental role, since they make it possible to retrieve information from the field to address different tasks and operations. This presentation has the purpose to deepen cognition in optical networks at the physical layer, defining a vendor agnostic optical line controller (OLC) architecture capable of autonomously setting the working point of optical amplifiers to maximize the capacity of the optical link. The presented framework is based on an automatic characterization procedure of the line, span by span, to abstract the properties of the physical layer, exploiting the monitoring devices present in each amplification site such as optical channel monitors (OCMs) and optical time domain reflectometers (OTDRs). On the basis of this information, an optimization algorithm determines the working point of each amplifier to obtain the highest and flattest quality of transmission (QoT) for each channel. The entire system has been experimentally tested in the laboratory using two different optimization strategies, showing interesting behaviors and an excellent match with respect to emulation results. The main tools used within the framework are GNPy open source Python libraryand the covariance matrix adaptation evolution strategy (CMA-ES), used as an optimization algorithm to identify properties of each fiber span and to maximize the link capacity.

Biography

Giacomo Borraccini received the Master Degree in Electronic Engineering in Politecnico di Torino in October 2019 cum Laude with a thesis about Raman gain optimization in multi-band optical transmission. Since November 2019, he is a Ph.D. candidate at Politecnico di Torino in Electrical, Electronics and Communications Engineering in the team PLANET within the Optical Communication (OptCom) group. The research activity undertaken is focused on multi-band amplification systems in open optical networks, maintaining collaborations with Cisco Photonics and the LINKS Foundation laboratories. Since June 2020, he has actively contributed to the development of the GNPy scientific library within the Telecom Infra Project (PSE working group). Currently, he is president of the OSA Student Chapter Torino.

Dr. William Todd Penberthy

Title: Utilization of the 1064nm Wavelength in Photobiomodulation: A Systematic Review and Meta-Analysis

Invited Talk

Dr. William Todd Penberthy

CME Scribe, USA

Abstract

Photobiomodulation therapy (PBMT) has entered mainstream acceptance with recognition by payers for the treatment of cancer patients for oral mucositis using low-level light therapies (LLLT), but progress with high-intensity laser therapy (HLIT) has yet to achieve such status in part due to hesitation to use FDA class IV devices that are typically associated with surgical purposes and also due to negative clinical trial outcomes from low powered PBMT treating tissue pathologies too deep to receive low powered light. Clinical trials have proven that high-powered lasers can produce positive outcomes often when LLLT cannot. This study aimed to evaluate the scope of the range of clinically proven high-intensity laser indications responding with a favorable outcome towards better understanding of optimal laser setting parameters and treatment plans. The 25 independent studies meeting inclusion criteria focused on arthropathies, spine, shoulder/elbow, wound, chronic sinusitis, temporomandibular joint dysfunction, endometriosis, osteoporosis with evaluation of pain, range of motion, mobility, quality of life, and anatomy. Pain was consistently reduced with statistical significance (p<0.05) in 100% of studies focused on arthropathies (n=6) with sustained benefits detectable after cessation of treatment and 82% of all study pain assessments (n=22). Improvements in back/spine-related pathologies, wound healing, bone mineral density, and knee cartilage thickness were demonstrated. Largest effect sizes observed were observed for pain reduction in arthropathies (average Cohen's d effect size = 2.53), chronic sinusitis, cervical spondylosis, and adhesive capsulitis.  More studies are needed for the first future guideline-directed payer recognized.  

 

Biography

W. “Todd” Penberthy, obtained his PhD in biochemistry at the University of Tennessee, Memphis focused on transcription factors before training at Tufts New England Medical Center and UCLA focused on developmental biology of hematopoiesis and neurogenesis. As a faculty at the University of Cincinnati he led drug discovery collaborations using the zebrafish animal model of human diseases for small molecule discovery in collaboration with fortune 500 pharmaceutical company. Since, 2012 he has focused on providing continuing medical education (www.CMESCRIBE.com) writing for physician education/board certification while also providing biomedical scientific research and writing services.

Dr. Somnath Biswas

Title: Watching Electrons Move: Understanding Solar Energy Conversation using Ultrafast XUV Spectroscopy

Invited Talk

Dr. Somnath Biswas

Princeton University, USA

Abstract

Solar energy has a great potential to meet the growing global energy demand. However, at present  sunlight contributes less than 1% to the total energy economy. To enable conversion and storage of solar  energy for practical applications, several scientific challenges remain to be addressed. Absorption of  sunlight produces energetic negative and positive charges, which can be utilized to generate electrical or  chemical energy. However, in many materials these charges recombine within femtoseconds of formation and limits the efficiency of a material. Therefore, if the energy conversion process is not well controlled  at the very early times following absorption of sunlight, these charges will recombine, and the energy is lost before they can be used. With the goal of better understanding and controlling charge motion in energy conversion materials, my work focuses on watching electrons move in solar materials. Towards this goal I have developed a lab based XUV spectrometer which can track motion of charges on thefemtosecond time scale. The mechanistic understanding obtained in these experiments promises to inform the design parameters for engineering materials with better energy conversion efficiency.

Biography

Somnath Biswas received his BS from Ramakrishna Mission Vidyamandira (Belur, India) in 2013. He obtained his MS from Indian Institute of Technology (Kanpur, India) in 2015. He received his Ph.D. from The Ohio State University under the supervision of Professor L. Robert Baker in 2020. Currently, he is a postdoctoral researcher at Princeton University with Professor Gregory D. Scholes. His research interests are in ultrafast spectroscopy, electron{phonon interaction, surface electronic structure, and quantum information science. He is a recipient of the Presidential Fellowship award from The Ohio State University and the Academic Excellence in Research award from the Federation of Indian Associations, USA.

Dr. Yahia Chergui

Title:

Invited Talk

Dr. Yahia Chergui

Cardiff University, UK

Abstract

In this work we used Parallal Molecular Dynamics and DL_POLY_4 to study the effect of different pressures and temperatures to analyze linear density of ZnO zinc rocksalt structure. Our system is formed from 5832 atoms of ZnO(2916 atoms of Zn+2 and 2916 atoms of O-2), the interatomic interactions are modeled by Coulomb-Buckingham Potential for short and long-range, the range of temperature is 300-3000K and for pressure is 0-100GPa. Although no more data under previous conditions our results are in the vicinity of available experimental and theoretical information. This work is very important in nanoscale of time and space and in different sectors of industry.

Biography

Yahia CHERGUI is an assistant Professor in Electrical & Electronics Engineering Institute, Boumerdes Algeria. He has completed his PhD from Badji Mokhtar University in Annaba, Algeria. He did all his PhD work in Cardiff University in UK. His research field is Physics(condensed matter, and soft matter simulation by molecular dynamics). He has many published articles and international conferences. He has been serving as a referee with condensed matter journal (IOP), Energy journal (Elsevier), and American Journal of Modern Physics

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