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Switching effect on a two prey-one predator system with strong Allee effect incorporating prey refuge

International Journal of Biomathematics 2024年第2期17卷 1-50页

作者： Sangeeta Saha Guruprasad samanta Department of Mathematics Indian Institute of Engineering Science and Technology Shibpur Howrah 711103India

In an environment,the food chains are balanced by the prey-predator *** a predator species is provided with more than one prey population,it avails the option of prey switching between prey species according to their ***,prey switching of predators mainly helps to increase the overall growth rate of a predator *** this work,we have proposed a two prey-one predator system where the predator population adopts switching behavior between two prey species at the time of *** the prey population exhibit a strong Allee effect and the predator population is considered to be a generalist *** proposed system is biologically well-defined as the system variables are positive and do not increase abruptly with *** local stability analysis reveals that all the predator-free equilibria are saddle points whereas the prey-free equilibrium is always *** intrinsic growth rates of prey,the strong Allee parameters,and the prey refuge parameters are chosen to be the controlling parameters *** numerical simulation reveals that in absence of one prey,the other prey refuge parameter can change the system dynamics by forming a stable or unstable limit ***,a situation of bi-stability,tri-stability,or even multi-stability of equilibrium points occurs in this *** in presence of the switching effect,the predator chooses prey according to their abundance,so,increasing refuge in one prey population decreases the count of the second prey *** is also observed that the count of predator population reaches a comparatively higher value even if they get one prey population at its fullest quantity and only a portion of other prey ***,in the scarcity of one prey species,switching to the other prey is beneficial for the growth of the predator population.

关键词： Prey-predator model switching effect strong Allee effect prey refuge

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Protected simultaneous quantum remote state preparation scheme by weak and reversal measurements in noisy environments

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Chinese Physics B 2024年第2期33卷 169-177页

作者： Mandal Manoj Kumar Choudhury Binayak S. samanta Soumen Department of Mathematics Indian Institute of Engineering Science and TechnologyShibpur B.GardenHowrah 711103West BengalIndia

We discuss a quantum remote state preparation protocol by which two parties, Alice and Candy, prepare a single-qubit and a two-qubit state, respectively, at the site of the receiver Bob. The single-qubit state is known to Alice while the two-qubit state which is a non-maximally entangled Bell state is known to Candy. The three parties are connected through a single entangled state which acts as a quantum channel. We first describe the protocol in the ideal case when the entangled channel under use is in a pure state. After that, we consider the effect of amplitude damping(AD) noise on the quantum channel and describe the protocol executed through the noisy channel. The decrement of the fidelity is shown to occur with the increment in the noise parameter. This is shown by numerical computation in specific examples of the states to be created. Finally, we show that it is possible to maintain the label of fidelity to some extent and hence to decrease the effect of noise by the application of weak and reversal measurements. We also present a scheme for the generation of the five-qubit entangled resource which we require as a quantum channel. The generation scheme is run on the IBMQ platform.

关键词： multi-qubit entangled channel quantum remote state preparation noisy environments weak and reversal measurements

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Quality of life of COVID-19 recovered patients:a 1-year follow-up study from Bangladesh

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Infectious Diseases of Poverty 2023年第4期12卷 101-102页

作者： Mohammad Delwer Hossain Hawlader Md Utba Rashid Md Abdullah Saeed Khan Mowshomi Mannan Liza Sharmin Akter Mohammad Ali Hossain Tajrin Rahman Sabrina Yesmin Barsha Alberi Afifa Shifat Mosharop Hossian Tahmina Zerin Mishu Soumik Kha Sagar Ridwana Maher Manna Nawshin Ahmed Sree Shib Shankar Devnath Debu Irin Chowdhury samanta sabed Mashrur Ahmed Sabrina Afroz Borsha Faraz Al Zafar Sabiha Hyder Abdullah Enam Habiba Babul Naima Nur Miah Md.Akiful Haque Shopnil Roy K.M.Tanvir Hassan Mohammad Lutfor Rahman Mohammad Hayatun Nabi Koustuv Dalal Department of Public Health North South University Dhaka Bangladesh International Centre for Diarrhoeal Disease Research Bangladesh Dhaka Bangladesh National Institute of Preventive and Social Medicine Dhaka Bangladesh Ibn Sina Medical College Hospital Dhaka Bangladesh Public Health Promotion and Development Society (PPDS) Dhaka Bangladesh Covid Vaccine Coordination Cell Directorate General of Health Services (DGHS) Dhaka Bangladesh Institute of Statistical Research and Training (ISRT) University of Dhaka Dhaka Bangladesh School of Health Sciences Division of Public Health Science Mid Sweden University Sundsvall Sweden

BackgroundThe COVID-19 pandemic posed a danger to global public health because of the unprecedented physical,mental,social,and environmental impact affecting quality of life(QoL).The study aimed to find the changes in QoL among COVID-19 recovered individuals and explore the determinants of change more than 1 year after recovery in low-resource ***-19 patients from all eight divisions of Bangladesh who were confirmed positive by reverse transcription-polymerase chain reaction from June 2020 to November 2020 and who subsequently recovered were followed up twice,once immediately after recovery and again 1 year after the first *** follow-up study was conducted from November 2021 to January 2022 among 2438 individuals using the World Health Organization Quality of Life Brief Version(WHOQOL-BREF).After excluding 48 deaths,95 were rejected to participate,618 were inaccessible,and there were 45 cases of incomplete *** statistics,paired-sample analyses,generalized estimating equation(GEE)analysis,and multivariable logistic regression analyses were performed to test the mean difference in participants’QoL scores between the two *** participants(n=1710,70.1%)were male,and one-fourth(24.4%)were older than *** average physical domain score decreased significantly from baseline to follow-up,and the average scores in psychological,social,and environmental domains increased significantly at follow-up(P<0.05).By the GEE equation approach,after adjusting for other factors,we found that older age groups(P<0.001),being female(P<0.001),having hospital admission during COVID-19 illness(P<0.001),and having three or more chronic diseases(P<0.001),were significantly associated with lower physical and psychological QoL *** age and female sex[adjusted odd ratio(aOR)=1.3,95%confidence interval(CI)1.0–1.6]were associated with reduced social domain scores on multivariable logistic regression *** or semi-urban peo

关键词： Quality of life Health-related quality of life Reverse transcription-polymerase chain reaction COVID-19 Bangladesh

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Dual-wavelength all-fiber Q-switched fiber laser using bismuth-doped fiber as saturable absorber

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Optoelectronics Letters 2024年第3期20卷 147-151页

作者： Aruna Ghosh Abdulkadir Mukhtar Diblawe Uttam Kumar samanta Moh Yasin Sulaiman Wadi Harun Mukul Chandra Paul Fiber Optics and Photonics Division CSIR-Central Glass and Ceramic Research InstituteKolkata 700032India Physics Department Jadavpur UniversityKolkata 700032India Photonics Engineering Laboratory Department of Electrical EngineeringUniversity of MalayaKuala Lumpur 50603Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

A passively Q-switched all-fiber laser is demonstrated using a 10-cm-long bismuth-doped fiber(BDF) as a saturable absorber(SA). The dual-wavelength operation was obtained due to the nonlinear effect inside the fabricated BDF, which has a high germanium content. Stable Q-switched pulses were obtained at the dual synchronous wavelengths of 1 530.1 nm and 1 531.1 nm. When the pump power is tuned from 105.3 mW to 191.0 mW, the repetition rate can be varied from 82.6 kMz to 117.6 kHz. The maximum pulse energy and average output power were 83.4 nJ and 9.8 mW, respectively while the minimum pulse width was 8.5 μs at the maximum pump power of 191.0 mW. Our results indicate that BDF could be a promising alternative optical modulator for pulsed fiber laser application.

关键词： fiber switched pump

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Intermolecular hydrogen-bonding as a robust tool toward significantly improving the photothermal conversion efficiency of a NIR-II squaraine dye

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Chinese Chemical Letters 2024年第4期35卷 310-315页

作者： Songtao Cai Liuying Wu Yuan Li Soham samanta Jinying Wang Bing Liu Feihu Wu Kaitao Lai Yingchao Liu Junle Qu Zhigang Yang Center for Biomedical Photonics&Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

The photothermal therapy(PTT) has come across as a promising noninvasive therapeutic strategy for tumor treatment. However, low photothermal conversion efficiency(PCE) and hydrophobicity may impede the therapeutic efficacy of organic photothermal agents and an efficient PTT-agent must overcome these two major challenges. In this work, we developed a new strategy to promote higher PCE wherein the intermolecular hydrogen-bonding interaction between the single dye molecule and water facilitated the transformation of the absorbed energy into the heat. A hydrophilic squaraine dye(SCy1) with the second near-infrared region(NIR-II) absorption and extremely low emission were designed to exhibit much higher PCE than that of the analogues of pentamethine-dyes(PCy1, PCy2). The presence of the ‘–O-' at middle of squaric cycle enabled the intermolecular H-bonding formation between the SCy1 and water to promote the energy dissipation channel. Moreover, the introduction of long-chain phenylsulfonate groups helped in to improve the water solubility apart from serving as an additional means of further enhancing PCE through fluorescence quenching. Therefore, SCy1 with a squaraine backbone and long-chain sulfonate moieties revealed outstanding photothermal stability and anti-aggregation activity apart from showing exceptionally high PCE(74%) in water. SCy1 demonstrated excellent therapeutic efficacy when applied in the PTT treatment of tumor-bearing mice under a laser irradiation of 915 nm.

关键词： Squaraine-based cyanine Hydrogen bonds High PCE Anti-aggregation Photothermal therapy

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Fecal microbiota transplantation in the treatment of hepatic encephalopathy:A perspective

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World Journal of Hepatology 2024年第5期16卷 678-683页

作者： Arghya samanta Moinak Sen Sarma Department of Pediatric Gastroenterology Sanjay Gandhi Postgraduate Institute of Medical SciencesLucknow 226014India

Due to its complex pathogenesis,treatment of hepatic encephalopathy(HE)continues to be a therapeutic *** late,gut microbiome has garnered much attention for its role in the pathogenesis of various gastrointestinal and liver diseases and its potential therapeutic *** evidence suggests that gut micro-biota plays a significant role in cerebral *** in the gut microbiota has been documented in patients with HE in a number of clinical and experimental *** on gut dysbiosis in patients with HE has opened newer therapeutic avenues in the form of probiotics,prebiotics and the latest fecal microbiota transplantation(FMT).Recent studies have shown that FMT is safe and could be effective in improving outcomes in advanced liver disease patients presenting with ***,questions over the appropriate dose,duration and route of administration for best treatment outcome remains unsettled.

关键词： Fecal microbiota Dysbiosis Hepatic encephalopathy Cirrhosis

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Metabolic dysfunction-associated steatotic liver disease:A silent pandemic

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World Journal of Hepatology 2024年第4期16卷 511-516页

作者： Arghya samanta Moinak Sen Sarma Department of Pediatric Gastroenterology Sanjay Gandhi Postgraduate Institute of Medical SciencesLucknow 226014India

The worldwide epidemiology of non-alcoholic fatty liver disease(NAFLD)is showing an upward trend,parallel to the rising trend of metabolic syndrome,owing to lifestyle *** pathogenesis of NAFLD has not been fully understood ***,NAFLD has emerged as a public health concern in the field of hepatology and metabolisms *** changes in the nomenclature from NAFLD to metabolic dysfunction-associated steatotic liver disease have brought a positive outlook changes in the understanding of the disease process and doctor-patient *** changes are the main treatment ***,clinical trial using drugs that target‘insulin resistance’which is the driving force behind NAFLD,have shown promising *** translational research is needed to better understand the underlying pathophysiological mechanism of NAFLD which may open newer avenues of therapeutic *** role of gut dysbiosis in etiopathogenesis and use of fecal microbiota modification in the treatment should be studied *** of this silent epidemic by spreading awareness and early intervention should be our priority.

关键词： Metabolic dysfunction Fatty liver Obesity Insulin resistance

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Anomalous thermal expansion and enhanced magnetocaloric effect in<001>-textured Mn_(x)Fe_(5-x)Si_(3) alloys

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Rare Metals 2024年第5期43卷 2263-2274页

作者： Yong Gong Xue-Fei Miao Tapas samanta Chris Taake Jun Liu Feng-Jiao Qian Yan-Yan Shao Yu-Jing Zhang Qing-Yong Ren Luana Caron Feng Xu MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Department of Physics Bielefeld University33501BielefeldGermany College of Physics Nanjing University of Aeronautics and AstronauticsNanjing210016China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Spallation Neutron Source Science Center Dongguan523803China Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology Dongguan523803China Department of Physics Bielefeld University33501BielefeldGermany Helmholtz-Zentrum Berlin für Materialien und Energie12489BerlinGermany

The development of zero and negative therma expansion(i.e.,ZTE and NTE)materials is of crucial importance to the control of undesirable thermal expansion for high-precision *** the present work,ZTE and NTE were obtained in directionally-solidified Mn_(x)Fe_(5-x)Si_(3)alloys with a strongtexture,in striking contrast to positive thermal expansion in their isotropic counterparts Magnetometry and in-situ X-ray diffraction(XRD)measurements were performed to uncover the origin of the anomalous thermal *** measurements indicate a strong easy-plane magnetocrystalline anisotropy in the textured samples,where the magnetic moments are aligned within the ab plane of the hexagonal structure Temperature-dependent XRD on the x=1 sample reveals a ZTE character in the ab plane that is coupled to a ferromagnetic *** a result,the macroscopic ZTE(~0.22×10^(-6)K^(-1))in the x=1 sample can be attributed to the microscopic magneto volume effect within the ab plane,which is realized by the introduction of the-textured ***,the competition between antiferromagnetic and ferromagnetic exchange coupling leads to NTE in textured x=1.5 and 2 ***,textured x=1 sample displays enhanced magnetocaloric properties as compared to the conventional counterparts with randomly-oriented *** this work demonstrates a new strategy toward the exploration of anomalous thermal expansion properties as well as the enhancement of magnetocaloric properties for materials with a strong magnetocrystalline anisotropy.

关键词： MnFeySis Magnetocaloric effect Magnetic phase transition Negative thermal expansion

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Hepatic pseudotumor:A diagnostic challenge

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World Journal of Hepatology 2024年第5期16卷 667-670页

作者： Arghya samanta Moinak Sen Sarma Department of Pediatric Gastroenterology Sanjay Gandhi Postgraduate Institute of Medical SciencesLucknow 226014India

Hepatic pseudotumors are rare lesions of unknown origin,characterized by the proliferation of fibrous connective tissue and inflammatory cell *** mimic malignant lesions clinically,and radiologically,given their non-specific clinical and imaging *** pathophysiology of hepatic pseudotumor is incompletely understood and there are no standardized criteria for *** have been reported to develop in various organs in the body with the lung and liver being the most common *** pseudotumors develop in patients with underlying triggers of liver inflammation and injury,including infections,autoimmune liver diseases,bile duct injury,or *** pse-udotumors respond well to conservative treatment with antibiotics,and steroids and some may regress spontaneously,thus avoiding unnecessary *** condition is rewarding to *** is important to recognize pseudotumor as a distinct clinical entity and include it in the differential of liver masses with atypical imaging features.

关键词： Hepatic pseudotumor Infection Stroglyloides Hepatic resection

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Autophagy and mitophagy as potential therapeutic targets in diabetic heart condition:Harnessing the power of nanotheranostics

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Asian Journal of Pharmaceutical Sciences 2024年第3期19卷 79-101页

作者： Sagnik Nag Oishi Mitra Bhanu Maturi Simran Preet Kaur Ankita Saini Muskan Nama Soumik Roy Souvik samanta Leena Chacko Rohan Dutta Suresh Babu Sayana Vetriselvan Subramaniyan Jasvinder Singh Bhatti Ramesh Kandimalla Jeffrey Cheah School of Medicine and Health Sciences Monash University MalaysiaJalan Lagoon Selatan47500 Bandar SunwaySelangorMalaysia Department of Bio-Sciences School of Bio-Sciences&Technology(SBST)Vellore Institute of Technology(VIT)Tiruvalam RoadVellore 632014Tamil NaduIndia Department of Internal Medicine University of Alabama at BirminghamBirminghamALUSA Department of Microbiology University of Delhi(South Campus)Benito Juarez RoadNew Delhi 110021India Department of Biotechnology Indian Institute of TechnologyHyderabad(IIT-H)SangareddyTelangana 502284India BioAnalytical Lab Meso Scale Discovery1601 Research BlvdRockvilleMDUSA Department of Pharmacology Government Medical CollegeSuryapetTelanganaIndia Laboratory of Translational Medicine and Nanotherapeutics Department of Human Genetics and Molecular MedicineSchool of Health SciencesCentral University of PunjabBathindaIndia Department of Biochemistry Kakatiya Medical CollegeWarangal 506007India

Autophagy and mitophagy pose unresolved challenges in understanding the pathology of diabetic heart condition(DHC),which encompasses a complex range of cardiovascular issues linked to diabetes and associated *** significant progress in reducing mortality rates from cardiovascular diseases(CVDs),heart failure remains a major cause of increased morbidity among diabetic *** cellular processes are essential for maintaining cellular balance and removing damaged or dysfunctional components,and their involvement in the development of diabetic heart disease makes them attractive targets for diagnosis and *** a variety of conventional diagnostic and therapeutic strategies are available,DHC continues to present a significant ***-of-care diagnostics,supported by nanobiosensing techniques,offer a promising alternative for these complex *** conventional medications have been widely used in DHC patients,they raise several concerns regarding various physiological *** medicine places great emphasis on the application of nanotechnology to target autophagy and mitophagy in DHC,offering a promising approach to deliver drugs beyond the limitations of traditional *** article aims to explore the potential connections between autophagy,mitophagy and DHC,while also discussing the promise of nanotechnology-based theranostic interventions that specifically target these molecular pathways.

关键词： Autophagy Diabetes Diabetic heart condition Mitophagy Nanotheranostics Nanomedicine

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