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This paper is devoted to the understanding of the emergence of chaos in the discrete time version of the core-periphery model proposed by Currie and Kubin (2006). To this purpose, we present a careful and thorough analysis of the model, including proofs of relevant unproved statements. We are able to describe the sources of chaos and, in some cases, determine how to eliminate them. The analytical study is complemented by numerical simulations in Matlab.
The complex microenvironment in which malignant tumor cells grow is crucial for cancer progression. The physical and biochemical characteristics of this niche are involved in controlling cancer cell differentiation, proliferation, invasion, and metastasis. It is therefore essential to understand how cancer cells interact and communicate with their surrounding tissue - the so-called tumor stroma - and how this interplay regulates disease progression. To mimic the tumor microenvironment (TME), 3D in vitro models are widely used because they can incorporate different patient-derived tissues/cells and allow longitudinal readouts, thus permitting deeper understanding of cell interactions. These models are therefore excellent tools to bridge the gap between oversimplified 2D systems and unrepresentative animal models. We present an overview of state-of-the-art 3D models for studying tumor-stroma interactions, with a focus on understanding why the TME is a key target in cancer therapy.
Proceeds from this fundraising campaign will be used to produce Liliana's 3D model and enhance her motion capture suit, as well as allocate for video editing, and live events. The tentative date of rewards is set for January 2023.
In her research, Gallegos applies quantum mechanical modeling to the molecules in a chemical reaction in order to understand the most likely reaction process to form the desired products, along with statistical modeling of the reaction.
EconPapers FAQ Archive maintainers FAQ Cookies at EconPapers Format for printing The RePEc blog The RePEc plagiarism page Periodic real-time scheduling: from deadline-based model to latency-based modelLiliana Cucu (Obfuscate( 'loria.fr', 'liliana.cucu' )), Nicolas Pernet (Obfuscate( 'inria.fr', 'nicolas.pernet' )) and Yves Sorel (Obfuscate( 'inria.fr', 'yves.sorel' ))Annals of Operations Research, 2008, vol. 159, issue 1, 51 pagesAbstract:This paper presents a connection between two real-time models: a deadline-based model and a latency-based model. The importance of the latency-based model is proved through a result showing that two deadlines, instead of a latency constraint, over-constrain the real-time applications. Moreover, we give a deadline-marking algorithm based on the relation between deadlines and latency constraints. This algorithm provides non-preemptive feasible schedules for systems with precedence constraints and deadlines, or more complex systems with deadlines and latencies. This is the first step toward non-preemptive schedulability for distributed architectures (without over-constraining the system) like, for example, the automotive applications using protocols such as Controller Area Network (CAN). Copyright Springer Science+Business Media, LLC 2008Keywords: Scheduling; Real-time; Non-preemptive; Latency; Deadline; Periodicity (search for similar items in EconPapers)Date: 2008References: View references in EconPapers View complete reference list from CitEc Citations: Track citations by RSS feedDownloads: (external link) -007-0279-9 (text/html)Access to full text is restricted to subscribers.Related works:This item may be available elsewhere in EconPapers: Search for items with the same title.Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/TextPersistent link: :spr:annopr:v:159:y:2008:i:1:p:41-51:10.1007/s10479-007-0279-9Ordering information: This journal article can be ordered from DOI: 10.1007/s10479-007-0279-9Access Statistics for this articleAnnals of Operations Research is currently edited by Endre BorosMore articles in Annals of Operations Research from SpringerBibliographic data for series maintained by Sonal Shukla (Obfuscate( 'springer.com', 'sonal.shukla' )) and Springer Nature Abstracting and Indexing (Obfuscate( 'springernature.com', 'indexing' )). var addthis_config = {"data_track_clickback":true}; var addthis_share = { url:" :spr:annopr:v:159:y:2008:i:1:p:41-51:10.1007/s10479-007-0279-9"}Share This site is part of RePEc and all the data displayed here is part of the RePEc data set. Is your work missing from RePEc? Here is how to contribute. Questions or problems? Check the EconPapers FAQ or send mail to Obfuscate( 'oru.se', 'econpapers' ). EconPapers is hosted by the Örebro University School of Business.
10.2022. Lima, B., Fachada, N., Dinis, R., da Costa, D.B. & Beko, M. (2022). uavnoma: a UAV-NOMA network model under non-ideal conditions. Journal of Open Research Software, 10(1), 9.
04.2022. Fachada, N. (2022). A computational pipeline for modeling and predicting wildfire behavior. In Proceedings of the 7th International Conference on Complexity, Future Information Systems and Risk, COMPLEXIS 2022 (pp. 79-84), Virtual Event. SciTePress/INSTICC. DOI:
A model based control procedure for the shape of a Nd:YAG cylindrical bar grown by edge-defined film-fed growth (E.F.G.) method when the pressure in the furnace oscillatesbyLiliana BraescuDepartment of Mathematics, Polytechnical University of Timisoara, P-ta Regina Maria, No.1, 300004 - Timisoara, RomaniaCoauthors: Agneta M. Balint (Department of Physics, The West University of Timisoara), Stefan Balint (Department of Mathematics, The West University of Timisoara)
The main purpose of this paper is to give a model based proof of the fact that the effect of the variations of the pressure p can be compensated by an adequate variation of the pulling rate v in order to assure a constant diameter of the Nd:YAG cylindrical bar, grown from the melt by E.F.G. method.For that, using a nonlinear model, we find the pulling rate and the pressure couples for which the system of differential equations, which governs the evolution of the crystal radius r=r(t) and the meniscus height h=h(t) in the case of cylindrical bar, has asymptotically stable steady-state solution (r*, h*). By interpolation we find the dependences r*=r*(p, v), h*=h*(p, v) and the set S of those couples (p, v) for which r*(p, v)= rf, where rf is a desired radius. Using the curves S we show that, if during the growth the pulling rate v and/or the pressure p are changed, then the crystal radius is changed too. For a given variation of the pressure, during the growth, we give a control procedure i.e. a procedure to change adequately the pulling rate in order to obtain a single crystal with the prescribed radius rf.
Urban environments are intelligent spaces where a wide set of heterogeneous variables that directly influence the behavior of the individual converge. In this paper we present UrbanContext, a new model for urban platforms that follows an individual centered approach and validates the use of the Theory of Roles to understand the behavior of the individual within a social environment. The roles defined in UrbanContext allow the interpretation of the states of the individual, facilitating his interaction with the environment and offering services without damaging his privacy. We describe the UrbanContext model and the fundamental principles that have been identified in this design; likewise we present a first validation scenario for UrbanContext.
Computer Model for performance evaluation and economic risk is a model complex based on appropriate methodologies with specific indicators, necessary to administer the agricultural farm, management, efficient and increase its productivity. System of indicators is intended as a centralized source of information necessary to improve economic performance and efficient use of production factors by which to ensure the development of commercial farms, efficient use of input, raising yields and improve economic performance. 2b1af7f3a8