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Dynamic analysis of a predator-prey model of Gause type with Allee effect and non-Lipschitzian hyperbolic-type functional response

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International Journal of Biomathematics 2024年第1期17卷 81-112页

作者： liliana Puchuri Orestes Bueno Pontificia Universidad Catolica del Peri Av.Universitaria 1801 San MiguelLima 15088Peru Universidad del Pacifico Jr.Gral Luis Sanchez Cerro 2141 Jesus MariaLima 15072Peru

In this work,we study a predator-prey model of Gause type,in which the prey growth rate is subject to an Allee effect and the action of the predator over the prey is determined by a generalized hyperbolic-type functional response,which is neither differentiable nor locally Lipschitz at the predator *** kind of functional response is an extension of the so-called square root functional response,used to model systems in which the prey have a strong herd *** study the behavior of the solutions in the first quadrant and the existence of limit *** prove that,for a wide choice of parameters,the solutions arrive at the predator axis in finite *** also characterize the existence of an equilibrium point and,when it exists,we provide necessary and sufficient conditions for it to be a center-type *** fact,we show that the set of parameters that yield a center-type equilibrium,is the graph of a function with an open *** also prove that any center-type equilibrium is stable and it always possesses a supercritical Hopf *** particular,we guarantee the existence of a unique limit cycle,for small perturbations of the system.

关键词： Predator-prey models Gause models Allee effect non-differentiable functional response

Toward sustainable waste management in small islands developing states: integrated waste-to-energy solutions in Maldives context

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Frontiers of Environmental Science & Engineering 2024年第2期18卷 133-148页

作者： Yao Wang Alejandro Ruiz-acevedo Eemaan Rameez Vijaya Raghavan Abid Hussain Xunchang Fei School of Civil and Environmental Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore United Nations Office for Project Services(UNOPS) United Nations BuildingBuruzu MaguMale’20184Maldives Department of Bioresource Engineering McGill UniversitySte-Anne-De-BellevueQuebec H9X 3V9Canada Department of Civil and Environmental Engineering Carleton UniversityOttawaOntario K1S 5B6H9X 3V9Canada

Effective waste management is a major challenge for Small Island Developing States (SIDS) like Maldives due to limited land availability. Maldives exemplifies these issues as one of the most geographically dispersed countries, with a population unevenly distributed across numerous islands varying greatly in size and population density. This study provides an in-depth analysis of the unique waste management practices across different regions of Maldives in relation to its natural and socioeconomic context. Data shows Maldives has one of the highest population density and per capita waste generation among SIDS, despite its small land area and medium GDP per capita. Large disparities exist between the densely populated capital Male’ with only 5.8 km2 area generating 63% of waste and the ~194 scattered outer islands with ad hoc waste management practices. Given Male’s dense population and high calorific waste, incineration could generate up to ~30 GW/a energy and even increase Maldives’ renewable energy supply by 200%. In contrast, decentralized anaerobic digestion presents an optimal solution for outer islands to reduce waste volume while providing over 40%–100% energy supply for daily cooking in local families. This timely study delivers valuable insights into designing context-specific waste-to-energy systems and integrated waste policies tailored to Maldives’ distinct regions. The framework presented can also guide other SIDS facing similar challenges as Maldives in establishing sustainable, ecologically sound waste management strategies.

关键词： Anaerobic digestion Waste incineration Waste management Maldives Small Island Developing States Waste-to-energy

Expression changes of mi RNA-regulated genes associated with the formation of the leafy head in cabbage

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Horticultural Plant Journal 2024年第4期10卷 1007-1019页

作者： Jorge Aleman-Baez Jose Fernando acevedo-Zamora Johan Bucher Chengcheng Cai Roeland E.Voorrips Guusje Bonnema Plant Breeding Wageningen University and ResearchWageningenThe Netherlands

The vegetative development of cabbage(Brassica oleracea ***)passes through seedling,rosette,folding and heading *** that form the rosette are large and mostly *** the following developmental stages,the plants produce leaves that curve inward to produce the leafy *** microRNAs and their target genes have been described participating in leaf development and leaf *** aim of this study is to investigate the role of miRNA-regulated genes in the transition from the rosette to the heading *** compared the mi RNA and gene abundances between emerging rosette and heading *** remove transcripts(miRNAs and genes)whose regulation was most likely associated with plant age rather than the change from rosette to heading stage,we utilized a non-heading collard green(*** ***)morphotype as *** resulted in 33 DEMs and 1998 DEGs with likely roles in the transition from rosette to heading stage in *** these 1998 DEGs,we found enriched GO terms related to DNA-binding transcription factor activity,transcription regulator activity,iron ion binding,and *** predicted the target genes of these 33 DEMs and focused on the subset that was differentially expressed(1998DEGs)between rosette and heading stage leaves to construct mi RNA-target gene interaction *** main finding is a role for miR396b-5p targeting two Arabidopsis thaliana orthologues of GROWTH REGULATING FACTORs 3(GRF3)and 4(GRF4)in pointed cabbage head formation.

关键词： Brassica oleracea var.capitata RNA sequencing miRNA-target gene network leafy head formation

Fractal Fractional Order Operators in Computational Techniques for Mathematical Models in Epidemiology

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1385-1403页

作者： Muhammad Farman Ali Akgül Mir Sajjad Hashemi liliana Guran Amelia Bucur Institue of Mathematics Khwaja Fareed University of Enginnering and Information TechnologyRaheem Yar KhanPakistan Department of Computer Science and Mathematics Lebanese American UniversityBeirutLebanon Department of Mathematics Art and Science FacultySiirt UniversitySiirt56100Turkey Department of Mathematics Mathematics Research CenterNear East UniversityNicosiaTurkey Department of Computer Engineering Biruni UniversityIstanbul34010Turkey Department of Hospitality Services Babes-Bolyai UniversityCluj-Napoca400174Romania Department of Pharmaceutical Sciences Vasile Goldi竤Western University of AradArad310025Romania Department of Mathematics and Informatics Faculty of SciencesLucian Blaga University of SibiuSibiu550012Romania Department of Electronics and Communication Engineering Saveetha School of EngineeringSIMATSChennaiTamilnaduIndia

New fractional operators, the COVID-19 model has been studied in this paper. By using different numericaltechniques and the time fractional parameters, the mechanical characteristics of the fractional order model areidentified. The uniqueness and existence have been established. Themodel’sUlam-Hyers stability analysis has beenfound. In order to justify the theoretical results, numerical simulations are carried out for the presented methodin the range of fractional order to show the implications of fractional and fractal *** applied very effectivenumerical techniques to obtain the solutions of themodel and simulations. Also, we present conditions of existencefor a solution to the proposed epidemicmodel and to calculate the reproduction number in certain state conditionsof the analyzed dynamic system. COVID-19 fractional order model for the case of Wuhan, China, is offered foranalysis with simulations in order to determine the possible efficacy of Coronavirus disease transmission in theCommunity. For this reason, we employed the COVID-19 fractal fractional derivative model in the example ofWuhan, China, with the given beginning conditions. In conclusion, again the mathematical models with fractionaloperators can facilitate the improvement of decision-making for measures to be taken in the management of anepidemic situation.

关键词： COVID-19 model fractal-fractional operator Ulam-Hyers stability existence and uniqueness numerical simulation

C19MC miRNA-520G induces SP100 antiviral gene transcription and inhibits melanin production in skin cutaneous melanoma

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Genes & Diseases 2024年第1期11卷 60-63页

作者： Goodwin G.Jinesh Marian T.Smallin Nino Mtchedlidze Isha Godwin Marco Napoli Nicole Hackel Manali S.Phadke Avani A.Deshpande Xiaobo Li John H.Lockhart Jaden R.Baldwin Suehelay acevedo-acevedo Yifeng Gao Michelle A.Reiser Keiran S.M.Smalley Elsa R.Flores Andrew S.Brohl Department of Molecular Oncology H.Lee Moffitt Cancer Center&Research InstituteTampaFL 33612USA Molecular Medicine Program H.Lee Moffitt Cancer Center&Research InstituteTampaFL 33612USA Saveetha Medical College ChennaiTamil Nadu 602105India Tumor Biology Department H.Lee Moffitt Cancer Center&Research InstituteTampaFL 33612USA Sarcoma Department H.Lee Moffitt Cancer Center&Research InstituteTampaFL 33612USA

SP100 is an antiviral protein that restricts the productive stage of human papillomavirus(HPV)and multiple other viruses,and viruses in turn block sUMO-1-mediated stabilization of SP100 and promotes its degradation(Table S1).Interferon(IFN)signaling could still produce more SP100 through transcription to counteract viruses.1 Viruses also disable the transcriptional up-regulation of SP100 to achieve persistent infection in hosts.

关键词： SP100 melanoma stabilization

Wood anatomy chronologies of Scots pine in the foothills of the Western Sayan(Siberia)

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Journal of Forestry Research 2024年第3期35卷 13-27页

作者： Elena A.Babushkina Dmitry R.Dergunov Mikhail S.Zharkov liliana V.Belokopytova Dina F.Zhirnova Bao Yang Jingjing Liu Xiaomei Peng Eugene A.Vaganov Khakass Technical Institute Siberian Federal UniversityAbakan 655017Russia Institute of Ecology and Geography Siberian Federal UniversityKrasnoyarsk 660036Russia Mathematical Methods and IT Department Siberian Federal UniversityKrasnoyarsk 660036Russia Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000People's Republic of China School of Geographic and Oceanographic Sciences Nanjing UniversityNanjing 210093People's Republic of China Department of Dendroecology V.N.Sukachev Institute of ForestSiberian Branch of the Russian Academy of ScienceKrasnoyarsk 660036Russia

Recent methodological advances in quantitative wood anatomy have provided new insights into the climatic responses of radial growth at the scale of cell structure of tree rings. This study considered long-term chronologies of tracheid measurements, indexed by a novel approach to separate their specific climatic responses from signal recorded in cell production(closely reflected in tree-ring width). To fill gaps in understanding the impact of climate on conifer xylem structure, Scots pine(Pinus sylvestris L.)trees > 200 years old were selected within the forest-steppe zone in southern Siberia. Such habitats undergo mild moisture deficits and the resulting climatic regulation of growth processes. Mean and maximum values of cell radial diameter and cell wall thickness were recorded for each tree *** a low level of climatogenic stress, components of cell chronologies independent of cambial activity were separated to obtain significant climatic signals revealing the timing of the specific stages of tracheid differentiation. Cell expansion lasted from mid-April to July and was impacted similarly to tree-ring width(stimulated by precipitation and stressed by heat), maximum cell size formed late June. A switch in the climatic responses of mean anatomical traits indicated transition to latewood in mid-July. Secondary wall deposition lasted until mid-September, suppressed by end of season temperatures. Generally, anatomical climatic responses were modulated by a less dry May and September compared with summer months.

关键词： Quantitative wood anatomy Cell radial size Cell wall thickness Pinus sylvestris Climatic response

Bloom-forming cyanobacteria and dinoflagellates in five Argentinian reservoirs:Multi-year sampling

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Water Biology and Security 2024年第1期3卷 28-36页

作者： Florencia Soledad Alvarez Dalinger Borja Claudia Nidia Veronica Laura Lozano liliana Beatriz Morana María Monica Salusso Facultad de Ciencias Naturales Universidad Nacional de SaltaAvenida Bolivia 5150Salta4400Argentina Consejo Nacional de Investigaciones Científicas y T'ecnicas(CONICET) Godoy Cruz 2290Ciudad Autonoma de Buenos AiresArgentina

Harmful algal blooms are important threats to reservoir *** a 15-year period,we sampled five Argentinian reservoirs to identify the responsible species for harmful algal blooms and determine the water quality factors driving their *** reservoirs exhibit diverse morphological and hydrological characteristics and are distributed across varying climatic *** blooms included an array of species,including toxin producers such as Raphidiopsis raciborskii,Aphanizomenon gracile,and Microcystis *** contrast,dinoflagellate blooms were predominantly characterized by *** cyanobacterial blooms primarily occurred in the shallower reservoirs located in warmer regions,whereas dinoflagellate blooms occurred where temperatures were *** most intense blooms occurred during the summer,and although cyanobacterial and chlorophyte blooms co-occurred,they never coexisted with dinoflagellate *** identified cyanotoxins in the reservoirs over the past three years,a phenomenon previously unreported in the *** that these reservoirs are drinking water sources for human populations,ongoing and systematic monitoring is needed to protect public *** the proliferation of algae and cyanobacteria in reservoirs requires resource management at the watershed level,and in the case of the Itiyuro and El Limon,requires binational management with Bolivia.

关键词： HABs Freshwater South America Toxins

Patterns of Interactions of the Complex City System:Emotional Urban Objects as Triggering Agents-A Secondary Publication

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Journal of World Architecture 2024年第1期8卷 45-53页

作者： O.A.Gonzalez liliana Beatriz Sosa Compeán Autonomous University of Nuevo Leon San Nicolás de los Garza 66455Mexico

This article presents an analysis of the patterns of interactions resulting from the positive and negative emotional events that occur in cities,considering them as complex *** explores,from the imaginaries,how certain urban objects can act as emotional agents and how these events affect the urban system as a *** adaptive complex systems perspective is used to analyze these *** results show patterns in the processes and dynamics that occur in cities based on the objects that affect the emotions of the people who live *** patterns depend on the characteristics of the emotional charge of urban objects,but they can be generalized in the following process:(1)immediate reaction by some individuals;(2)emotions are generated at the individual level which begins to generalize,permuting to a collective emotion;(3)a process of reflection is detonated in some individuals from the reading of collective emotions;(4)integration/significance in the community both at the individual and collective level,on the concepts,roles and/or functions that give rise to the process in the ***,it is clear that emotions play a significant role in the development of cities and these aspects should be considered in the design strategies of all kinds of projects for the *** extensions of this work could include a deeper analysis of specific emotional events in urban environments,as well as possible implications for urban policy and decision making.

关键词： Emotional events Urban objects Complex adaptive systems Adaptive complex systems City

Liver transplantation as an alternative for the treatment of perihilar cholangiocarcinoma: A critical review

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Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 139-145页

作者： Wellington Andraus Francisco Tustumi Alexandre Chagas Santana Rafael Soares Nunes Pinheiro Daniel Reis Waisberg liliana Ducatti Lopes Rubens Macedo Arantes Vinicius Rocha Santos Rodrigo Bronze de Martino Luiz Augusto Carneiro D’Albuquerque Department of Gastroenterology Transplantation UnitUniversidade de São PauloSão PauloBrazil

Background:Perihilar cholangiocarcinoma(phCCC)is a dismal *** is no consensus regard-ing the best treatment for patients with unresectable *** present review aimed to gather the current pieces of evidence for liver transplantation and liver resection as a treatment for phCCC and to build better guidance for clinical *** sources:The search was conducted in PubMed,Embase,Cochrane,and *** related references were searched *** criteria were:reports in English or Portuguese literature that a)patients with confirmed diagnosis of phCCC;b)patients treated with a curative intent;c)patients with the outcomes of liver resection and liver *** reports,reviews,letters,editorials,conference abstracts and papers with full-text unavailability were excluded from the ***:Most of the current literature is based on observational retrospective studies with low grades of *** resection has better long-term outcomes than systemic chemotherapy or palliation ther-apy and liver transplantation is a good alternative for selected patients with unresectable *** candidates for resection or transplantation should be medically fit and free of intrahepatic or extrahep-atic *** a general rule,patients presenting with a tumor having a longitudinal size>3 cm or extending below the cystic duct,lymph node disease,confirmed extrahepatic dissemination;intraoper-atively diagnosed metastatic disease;a history of other malignancies within the last five years,and did not complete chemoradiation regimen and were medically unfit should not be considered for *** of these criteria should be individually *** transplantation or resection should only be considered in highly experienced hepatobiliary centers,and any decision-making must be based on a multidisciplinary ***:phCCC is a complex condition with high *** therapies,including hepatec-tomy and liv

关键词： Liver transplantation Cholangiocarcinoma Liver neoplasms