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    757 research outputs found

    On decomposition of multistars into multistars

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    The multistar Sw1,...,wn S^{w_1,...,w_n} is the multigraph whose underlying graph is an nn-star and the multiplicities of its nn edges are w1,...,wn w_1,..., w_n. Let GG and HH be two multigraphs. An HH-decomposition of GG is a set DD of HH-subgraphs of GG, such that the sum of ω(e)\omega(e) over all graphs in DD which include an edge ee, equals the multiplicity of ee in GG, for all edges ee in GG. In this paper, we fully characterize S1,2,3,K1,mS^{1,2,3}, K_{1,m} and SmlS^{m^{l}} decomposable multistars, where mlm^l is mm repeated ll times

    Holographic Universe: Implications for Cancer, Parkinson’s, ALS, Autism, ME/CFS

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    The holographic principle was proposed by Nobel laureate Gerard ‘t Hooft in the 1990s and it has also been modeled by Leonard Susskind and Stephen Hawking. We’ve heard light mentioned with regard to the fundamental nature of reality for a long time; God said Let there be light, we are the light of the world, etc. But we haven’t investigated a possible role for the speed of light in our illnesses. This paper will do just that. The central premise is that light’s “speed” is a reflection of the degree to which the observer is removed from its source. In its Platonic state, light’s speed is zero. It is light from which time (i.e. light that has speed), by degrees, emerges. The Big Bang can be envisioned as a sphere, the center of which is a point, Alpha. Via expansion, Alpha becomes a sphere, Omega, by degrees, where each degree is c. For any given Alpha, the circumference of a circle on the sphere, Omega, is a set of resonant points that represent the speed of light or “end of time.” Every radius—every line drawn from Alpha to Omega—is an arrow of time, a parallel universe. Alpha (M or E) and Omega (E or M) increase in tandem, maintaining the degree of separation required by special relativity, E=mc^2. The holographic sphere of points equidistant from the Big Bang on which we find ourselves is not the only sphere of points equidistant from the Big Bang. There are spheres that are smaller (past) and larger (future) than ours. Where an arrow of time intersects a sphere-brane of light’s speed will be treated here as a “2D hologram.” For an observer behind the hologram, reality will appear to be accelerating/expanding. For an observer in front of it, reality will appear to be decelerating/contracting. For an observer at the speed of light, time is no longer a variable. 

    Reliability Estimation of Weibull -Exponential Distribution via Bayesian Approach

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    Bayesian estimation is employed in order to estimate the reliability function of Weibull-Exponential distribution by using different priors. The Bayes estimators of the reliability function have been obtained under square error, precautionary and entropy loss functio

    A dynamic model of typhoid fever with optimal control analysis

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    In this study, a deterministic mathematical model of Typhoid fever dynamics with control strategies; vaccination, hygiene practice, sterilization and screening is studied. The model is first analyzed for stability in terms of the control reproduction number, Rc,  with constant controls. The disease-free equilibrium and endemic equilibrium of the model exist and are shown to be stable whenever Rc1  respectively. The model by investigation shows a forward bifurcation and the sensitivity analysis conducted revealed the most biological parameters to be targeted by policy health makers for curtailing the spread of the disease. The optimal control problem is obtained through the application of the Pontryagin maximum principle with respect to the above-mentioned control strategies. Simulations of the optimal control system and sensitivity of the constant control system confirm that hygiene practice with sterilization could be the best strategy in controlling the disease

    Labour, pandemic crisis, and PNRR: preliminary issues

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    The intent of this work is bring to attention, as useful elements for a debate, the possibility of reasoning on the implementations that will come to the country-system from the resources of the PNRR.From a historical, albeit brief, and legislative analysis of active labor policies in Italy, one can try to understand how to stimulate Italian economic growth. To do this, one must examine the structural elements that contribute to making our country fragile in comparison with other European countries, fragility associated with the horizontal and vertical segregation that characterizes the world of work. This is a phenomenon that has worsened further during the pandemic crisis. Hence, employment discontinuity, non-standard contractual forms, differences in male and female employment rates, as well as that set of social, cultural, and psychological barriers all become elements that decline the concept of horizontal and vertical segregation mentioned earlier.This is where the PNRR comes into play, whose intentions include promoting a process of transformation in tune with the great changes in the socio-economic scenario.

    Epistemic logic for metadata modelling from scientific papers on Covid-19

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    The field of epistemic logic developed into an interdisciplinary area focused on explicating epistemic issues in, for example, artificial intelligence, computer security, game theory, economics, multiagent systems and the social sciences. Inspired, in part, by issues in these different ‘application’ areas, in this paper I propose an epistemic logic T for metadata extracted from scientific papers on COVID-19. More in details, I introduce a structure S to syntactically and semantically modelling metadata extracted with systems for extracting structured metadata from scientific articles in a born-digital form. These systems will be considered, in the logical model created, as ‘Metadata extraction agents’ (MEA). In this case MEA taken into consideration are CERMINE and TeamBeam. In an increasingly data-driven world, modelling data or metadata means to help systematise existing information and support the research community in building solutions to the COVID-19 pandemic

    Transculturality. When anthropology meets psychology

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    Transculturality.  When Anthropology meets Psycholog

    Overview of historical and recent verifications of the EPR argument and their applications to physics, chemistry and biology

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    Overview of historical and recent verifications of the EPR argument and their applications to physics, chem- istry and biolog

    Blocks within the period of Lucas sequence

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    In this paper, we consider the periodic nature of the sequence of  Lucas numbers L_n defined by the recurrence relation L_n= L_(n-1)+L_(n-2); for all n≥2; with initial condition L_0=2 and L_1=1. For any modulo m>1, we introduce the ‘blocks’ within this sequence by observing the distribution of residues within a single period of Lucas sequence. We show that length of any one period of the Lucas sequence contains either 1,2 or 4 blocks.

    The sequence of trifurcating Fibonacci numbers

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    One of the interesting generalizations of Fibonacci sequence is a k-Fibonacci sequence, which is further generalized into the ‘Bifurcating Fibonacci sequence’. In this paper we further generalize it into the sequence of ‘trifurcating Fibonacci numbers’. We obtain the Binet-like formula for these numbers. We also obtain the analogous of Cassini’s identity, Catalan’s identity, d’Ocagne’s identity and some fundamental identities for the terms of this sequence

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