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Photonics Research 2022年第1期10卷 68-75页

作者： A.S.LAL krishna SRUTI MENON ASISH PROSAD VARUN RAGHUNATHAN Department of Electrical Communication Engineering Indian Institute of ScienceBangalore 560012India

We experimentally demonstrate a novel quasi-bound state in the continuum(BIC) resonance in the mid-infrared wavelength region with the resonant electric field confined as a slot mode within a low-refractive-index medium sandwiched between high-index *** structures studied here comprise coupled amorphous germanium guided-mode resonance(GMR) structures with a top one-dimensional grating layer and bottom uniform layer separated by a low-index silicon nitride *** slot-mode profile within the silicon nitride layer with mode field confinement >30% is achieved as a solution to the electromagnetic wave propagation through the coupled GMR structure with the dominant field component being perpendicular to the *** quasi-BIC resonance in symmetric 1D grating structures can be observed even at normal incidence when considering a realistic excitation beam with finite angular *** measured transmission peak is found to redshift(remain almost unchanged)under classical(full-conical) mounting *** highest quality factor of ~400 is experimentally extracted at normal incidence under a classical mounting condition with a resonance peak at 3.41 μm *** slot-mode GMR structures with appropriately chosen low-index intermediate layers can find applications in resonantly enhanced sensing and active photonic devices.

关键词： mode resonance resonant

Three-stage algorithms for the large-scale dynamic vehicle routing problem with industry 4.0 approach

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Journal of Management Analytics 2022年第3期9卷 313-329页

作者： Maryam Abdirad krishna krishnan Deepak Gupta Department of Industrial Systemsand Manufacturing EngineeringWichita State UniversityWichitaKS 67260USA

Companies are eager to have a smart supply chain especially when they have adynamic system. Industry 4.0 is a concept which concentrates on mobility andreal-time integration. Thus, it can be considered as a necessary component thathas to be implemented for a dynamic vehicle routing problem. The aim of thisresearch is to solve large-scale DVRP (LSDVRP) in which the delivery vehiclesmust serve customer demands from a common depot to minimize transit costswhile not exceeding the capacity constraint of each vehicle. In LSDVRP, it isdifficult to get an exact solution and the computational time complexity growsexponentially. To find near-optimal answers for this problem, a hierarchicalapproach consisting of three stages: “clustering, route-construction, routeimprovement”is proposed. The major contribution of this paper is dealing withLSDVRP to propose the three-stage algorithm with better results. The resultsconfirmed that the proposed methodology is applicable.

关键词： dynamic vehicle routing problem clustered vehicle routing problem three-stage algorithm industry 4.0

Persuasive factors on the bioink printability and cell viability in the extrusion-based 3D bioprinting for tissue regeneration applications

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Engineered Regeneration 2023年第4期4卷 396-410页

作者： Devara Venkata krishna Mamilla Ravi Sankar Department of Mechanical Engineering Indian Institute of TechnologyTirupatiAndhra Pradesh 517619India

The extrusion-based bioprinting(EBBP)applications in the medical field tremendously increase due to its ver-satility in fabricating intricate geometry components with reasonable accuracy and *** bioink and its properties for an EBBP process are crucial in manufacturing parts with significant biocompatibility and *** EBBP demands optimized parameters for obtaining good printability and cell viability.A better understanding of the various process parameters is essential for the researcher to optimize the mechanical and biological properties of the printed *** biological,mechanical,and rheological parameters all together need to be evaluated to enhance the printability of *** article concisely delineates the effect of the rheological and physiochemical parameters on the biological and mechanical properties of the printed *** printing parameters and nozzle geometry,which considerably influence the printability,and shape fidelity of the bioprinted scaffolds are exemplified in ***,the challenges and future aspects of enhancing printability are discussed succinctly.

关键词： Bioprinting Printability Hydrogels Crosslinking

Sendai Framework’s Global Targets A and B: Opinions from the Global Platform for Disaster Risk Reduction’s Ignite Stage 2019

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International Journal of Disaster Risk Science 2022年第5期13卷 651-663页

作者： Nibedita S.Ray-Bennett krishna Clarke Daniel Mendez School of Business University of LeicesterLeicester LE17RHUK Avoidable Deaths Network University of LeicesterLeicester LE17RHUK Office of the President Saint Michael Parish of Saint MichaelCaribbean Development BankBridgetown 11000Barbados

The Sendai Framework for Disaster Risk Reduction 2015-2030 set seven global targets of which the first two targets are to reduce disaster deaths(target A) and diminish the number of affected people globally(target B)by *** realize these targets,the United Nations General Assembly’s Expert Working Group provided indicators to measure progress as well as terminologies for these targets in *** around these targets is *** article contributes to the understanding of the targets by exploring:(1) what are the conditions that may hinder achieving targets,as well as those that may accelerate their achievement at the national and local levels;and(2) which types of organizations should lead a country’s effort to reduce disaster deaths?These questions were answered by opinion survey research carried out at the Sixth Session of the Global Platform for Disaster Risk *** participants identified disaster risk reduction efforts,early warning systems,awareness,finance and investment(among others) as the important facilitating factors to achieve targets A and *** investment in human security,lack of response and coordination,uncertainty of climate change,poor information,lack of campaigns and low budget allocation(among others) are considered as the important hindering factors for these targets by the *** findings also suggest that the facilitating and hindering variables of targets A and B are interconnected with global target E(disaster risk governance and capacity building).The majority of the participants thought that it is the national government who should lead in a country’s effort to reduce disaster *** on these findings,a few recommendations have been made to improve policy and practice related to the indicators as well as to reimagine theories so that targets A and B can be realized in alignment with target E at the national and local levels by 2030.

关键词： Disaster deaths Disaster risk reduction Global Platform for Disaster Risk Reduction HealthEDRM Health system Sendai Framework’s targets A and B

Design and Robustness Analysis of a Wave-Based Controller for Tethered Towing of Defunct Satellites

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 278-280页

作者： Rui Qi Yang Zhang krishna D.Kumar the School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China IEEE the Department of Aerospace Engineering Ryerson UniversityToronto M5B 2K3Canada

Dear Editor, A microgravity environment in space, the elasticity of the tether,and complex flexible appendages make the tethered-towing system a nonlinear and underactuated system, which is sensitive and difficult to stabilize. This letter develops a controller based on wave propagation for tethered towing of defunct satellites, and carries out a robustness analysis of the controller via numerical simulation.

关键词： system elasticity letter

Delving into the recent advancements of spinal cord injury treatment: a review of recent progress

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Neural Regeneration Research 2022年第2期17卷 283-291页

作者： Joseph A.Flack krishna Deo Sharma Jennifer Yanhua Xie Department of Basic Sciences New York Institute of Technology College of Osteopathic Medicine at Arkansas State UniversityJonesboroARUSA Department of Biological Sciences and Arkansas Biosciences Institute Arkansas State UniversityJonesboroARUSA

Spinal cord injury(SCI) research is a very complex field lending to why reviews of SCI literatures can be beneficial to current and future researchers. This review focuses on recent articles regarding potential modalities for the treatment and management of SCI. The modalities were broken down into four categories: neuroprotectionpharmacologic, neuroprotection-non-pharmacologic, neuroregeneration-pharmacologic, neuroregeneration-non-pharmacologic. Peer-reviewed articles were found using Pub Med with search terms: "spinal cord injury", "spinal cord injury neuroregeneration", "olfactory ensheathing cells spinal cord injury", "rho-rock inhibitors spinal cord injury", "neural stem cell", "scaffold", "neural stem cell transplantation", "exosomes and SCI", "epidural stimulation SCI", "brain-computer interfaces and SCI". Most recent articles spanning two years were chosen for their relevance to the categories of SCI management and treatment. There has been a plethora of pre-clinical studies completed with their results being difficult to replicate in clinical studies. Therefore, scientists should focus on understanding and applying the results of previous research to develop more efficacious preclinical studies and clinical trials.

关键词： brain-computer interface epidural stimulation exosomes neuroprotection neuroregeneration scaffolds spinal cord injury management stem cells transplantation

Minimally invasive surgery for post cholecystectomy biliary stricture:current evidence and future perspectives

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World Journal of Gastrointestinal Surgery 2023年第10期15卷 2098-2107页

作者： Raja Kalayarasan Pothugunta Sai krishna Surgical Gastroenterology Jawaharlal Institute of Postgraduate Medical Education&ResearchPuducherry 605006India

Postcholecystectomy bile duct injury(BDI)remains a devastating iatrogenic complication that adversely impacts the quality of life with high healthcare *** a decrease in the incidence of laparoscopic cholecystectomy-related BDI,the absolute number remains high as cholecystectomy is a commonly performed surgical *** Roux-en-Y hepaticojejunostomy with meticulous surgical technique remains the gold standard surgical procedure with excellent longterm results in most *** with many hepatobiliary disorders,a minimally invasive approach has been recently explored to minimize access-related complications and improve postoperative *** patients with gallstone disease are often admitted for a minimally invasive cholecystectomy,laparoscopic and robotic approaches for repairing postcholecystectomy biliary stricture are *** recent series have shown the feasibility and safety of minimally invasive post-cholecystectomy biliary stricture management,most are retrospective analyses with small sample ***,long-term follow-up is avail-able only in a limited number of *** principles and technique of minimally invasive repair resemble open repair except for the extent of adhesiolysis and the suturing technique with continuous sutures commonly used in minimally invasive *** robotic approach overcomes key limitations of laparoscopic surgery and has the potential to become the preferred minimally invasive approach for the repair of postcholecystectomy biliary *** increasing use,lack of prospective studies and selection bias with available evidence precludes definitive conclusions regarding minimally invasive surgery for managing postcholecystectomy biliary ***-volume prospective studies are required to confirm the initial promising outcomes with minimally invasive surgery.

关键词： Robotics Laparoscopy Surgery Biliary stricture Cholecystectomy Gallstones

Review Article on Condition Assessment of Structures Using Electro-Mechanical Impedance Technique

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Structural Durability & Health Monitoring 2022年第2期16卷 97-128页

作者： krishna Kumar Maurya Anupam Rawat Rama Shanker Department of Civil Engineering MNNIT AllahabadPrayagraj211004India

Structural health monitoring(SHM)is a process for determination of presence,location,severity of damages and remaining life of the *** is widely applied in aerospace,mechanical and civil engineering sys-tems to assess the conditions of structures to improve the operation,safety,serviceability and reliability,*** are various SHM techniques for monitoring the health of structures such as global response based and local *** occur in the structures due to its inability to withstand intended design loadings,physical environment and chemical ***,damage identification is necessary to improve the durability of the structures for protection against catastrophic *** research paper is focused on elec-tro-mechanical impedance(EMI)technique which is one of the techniques based on smart *** smart materials are utilized for monitoring the health of the *** are used for damage determination and its quantification for the interrogated *** in admittance or impedance signature shows the existence of damage in the ***,the different statistical methods viz.,root mean square deviation(RMSD),mean absolute percentage deviation(MAPD),covariance(Cov),and correlation coefficient(CC)are used for the quantification of *** material such as piezoelectric materials,its properties and applica-tions are also *** this paper,the implementation of EMI technique based on different recent advances in smart materials and their appropriateness have been ***,the reviewed investigations are significant for the monitoring of real-life *** presented paper is the compact state-of-the-art for EMI technique which is used for *** examination will be valuable to infrastructural health monitoring and engineering applications in respect to innovative research directions.

关键词： Structural health monitoring condition assessment EMI technique PZT patches damages

The theory of pathological simile:unveiling the essence of homoeopathy

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History & Philosophy of Medicine 2024年第1期6卷 1-2页

作者： Sibin Ramabhadran Anandavally Sruthi krishna Gopukumar Sivakumar Thangam Nivedha krishnamoorthy Sajitha Kumari Department of Organon of Medicine Sarada Krishna Homoeopathic Medical College(Affiliated to The Tamil Nadu Dr.M.G.R.Medical UniversityChennai)Tamilnadu 629161India Department of Repertory Sarada Krishna Homoeopathic Medical College(Affiliated to The Tamil Nadu Dr.M.G.R.Medical UniversityChennai)Tamilnadu 629161India Research Facilitation Centre Sarada Krishna Homoeopathic Medical College(Affiliated to The Tamil Nadu Dr.M.G.R.Medical UniversityChennai)Tamilnadu 629161India

Background Homoeopathy,a therapeutic method based on the principle of‘Similia Similibus Curentur’(like cures like),has been widely practiced and studied since its discovery by *** Hahnemann in the late 18th *** time,numerous homoeopathic stalwarts have contributed to the development and understanding of this system of *** Hughes,a remarkable figure in the field of homoeopathy,has left an indelible mark on the development and understanding of this extraordinary system of medicine.

关键词： simile has since

Influence of Nano-Materials on Mechanical and Permeation Characteristics of High Strength Concrete

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 416-422页

作者： K V S Gopala krishna Sastry M Srinivasula Reddy A Ravitheja Civil Engineering G Pulla Reddy Engineering CollegeKurnoolAPIndia SVR Engineering College NandyalAndhra PradeshIndia

Efforts have been made to evaluate the influences of the addition of nanoparticles on the strength,durability and mineralogical changes of high strength concrete(HSC).Therefore,mixes were prepared for conventional concrete mix(CCM)of M80 ***,various mixes were prepared by replacing cementitious materials initially with 1%Nano-CaCO_(3)(NC),2%NC,3%NC in the CCM,and then 1%NC and Nano-SiO_(2)(NS)NS,2%NC and NS,3%NC and NS(NC and NS were in equal proportion)in the *** developed concretes were then evaluated for mechanical properties,permeation characteristics,and mineralogical *** the studies,it is found that the concrete at 2%NCS possesses superior mechanical and superior permeation characteristics of all the mixes.A clear variation in the mineralogical structure with the addition of nanoparticles has been observed.

关键词： high strength concrete nano silicon dioxide nano calcium carbonate mechanical properties permeation properties