Nite Time Research Articles

TO COMPARE THE EFFECT ON DILATATION OF PUPIL WITH AND WITHOUT DARK GLASSES

INTRODUCTION : Study is to compare the dilator effect of Tropicamide (1%) eyedrop in patients with closing their eyes after instillation of eyedrops and patients with their eyes normal blinking with wearing of dark glasses for 30 minutes. AIMS: Aim of our study to Recognize Most effective and Comfortable Method of Pupil Dilation in Mean time. METHODS: An observational cross-sectional study of total 50 Patients out of which 25 patients will be advised for closing of eyes(Group A) and 25 patients advised for wearing dark glasses with their eyes normal blinking (Group B)during the dilatation of pupil. Pupil diameter will be measured by slit lamp examination (in cobalt blue lter) and also by pupil diameter ruler. Aft RESULT: er Dilatation pupil dilatation is Almost Same in Both Group. In both group Group-B with wearing of dark glasses with normal eye blinking is more comfortable then Group-A with closed eyes. CONCLUSION: Dilatation effect is almost same in both with and without dark glasses groups in denite time period. But patients are more comfortable with wearing of dark glasses with normal eye blinking compare to closed eyes.

Optimality, Equilibrium, and Curb Sets in Decision Problems Without Commitment

The paper considers a class of decision problems with in_nite time horizon that contains Markov decision problems as an important special case. Our interest concerns the case where the decision maker cannot commit himself to his future action choices. We model the decision maker as consisting of multiple selves, where each history of the decision problem corresponds to one self. Each self is assumed to have the same utility function as the decision maker. We introduce the notions of Nash equilibrium, subgame perfect equilibrium, and curb sets for decision problems. An optimal policy at the initial history is a Nash equilibrium but not vice versa. Both subgame perfect equilibria and curb sets are equivalent to subgame optimal policies. The concept of a subgame optimal policy is therefore robust to the absence of commitment technologies.

Blow up and globality of solutions for a nonautonomous semilinear heat equation with Dirichlet condition

In this paper we prove the local existence of a nonnegative mild solution for a nonautonomous semilinear heat equation with Dirichlet condition, and give sucient conditions for the globality and for the blow up infinite time of the mild solution. Our approach for the global existence goes back to the Weissler's technique and for the nite time blow up we uses the intrinsic ultracontractivity property of the semigroup generated by the diffusion operator.

Nonsingular fast terminal sliding-mode stabilizer for a class of uncertain nonlinear systems based on disturbance observer

This paper investigates a novel nonsingular fast terminal sliding-mode control method for the stabilization of the uncertain time-varying and nonlinear thirdorder systems. The designed disturbance observer satis es the nite-time convergence of the disturbance approximation error and the suggested nite-time stabilizer assuresthe presence of the switching behavior around the switching curve in the nite time. Furthermore, this approach can overcome the singularity problem of the fast terminal sliding-mode control technique. Moreover, knowledge about the upper bounds of the disturbances is not required and the chattering problem is eliminated. Usefulness and e ffectiveness of the o ffered procedure are con rmed by numerical simulation results.

THE -ZITI'S METHOD TO DETECT THE BLOW-UP IN FINITE TIME IN SOME MODELS OF CHEMOTAXIS.

Ponte Academic JournalJun 2017, Volume 73, Issue 6 THE -ZITI'S METHOD TO DETECT THE BLOW-UP IN FINITE TIME IN SOME MODELS OF CHEMOTAXIS.Author(s): Larbi BSISS ,Cherif ZitiJ. Ponte - Jun 2017 - Volume 73 - Issue 6 doi: 10.21506/j.ponte.2017.6.20 Abstract:We consider a class of models of chemotactic bacterial populations, introduced by Keller-Segel. For those models, we investigate the possibility of chemotactic collapse, in other words, the possibility that in nite time the population of predators aggregates to form a delta-function (Dirac). To study this phenomenon, we applied the new numerical approximation called ziti's -method, which may or may not blow-up (in nite time), depending on the relative strength of three mechanisms in competition: (i) the chemotactic attraction of bacteria towards regions of high concentration in substrate (ii) the rate of consumption of the substrate by the bacteria and (iii) (possibly) the diusion of bacteria or the substrate. Our results are compared by the self similar (exact solution) obtained in [25]. Download full text:Check if you have access through your login credentials or your institution Username Password

Вихід Британії з ЄС: політичні та економічні наслідки для України

Brexit can slightly complicate the European integration of Ukraine. In particular, Kyiv will lose a strong supporter of its European aspirations inside the EU. Brexit also will strengthen the positions of eurosceptics and supporters of the renovation of relations with Moscow. The exit of the United Kingdom can negatively aff ect the state of Ukrainian foreign trade, which is closely linked to the European Union. In general, after Brexit for Ukraine increased the risks to remain for an indefi nite time without the att ention of the EU and the UK. However, their position on the European future of our country and Russian aggression will remain unchanged.

NUMERICAL ANALYSIS OF AN INVERSE PROBLEM ORIGINATED IN PHENOMENON OF POLLUTION AIR URBAN

This paper presents the calibration study of a two - dimensional mathematical model for the problem of urban air pollution. It is mainly assumed that air pollution is aected by wind convection, difusion and chemical reactions of pollutants. Consequently, a convection-diusion-reaction equation is obtained as a direct problem. In the inverse problem, the determination of the diusion is analyzed, assuming that one has an observation of the pollutants in a nite time. To solve it numerically the nite volume method is used, the least squares function is considered as cost function and the gradient is calculated with the sensitivity method.

KETEROBSERVASIAN SISTEM LINIER DISKRIT

Given the following discrete time-invariant linear control systems:where x 2 Rnx(t + 1) = Ax(t) + Bu(t);y(t) = Cx(t);is the state vector, u 2 Rmis an input vector, y 2 Rris dened as anoutput, A 2 Rnn, B 2 Rnm, and t 2 Zis dened as time. Linear system is said to beobservable on the nite time interval [t0; t+f] if any initial state xis uniquely determinedby the output y(t) over the same time interval. In order to examine the observabilityof the system, we will use a criteria, that is by determining the observability Gramianmatrix of the system is nonsingular and rank of the observability matrix for the systemis n.

Mean Curvature Flow of Submanifolds With Small Traceless Second Fundamental Form

Consider a family of smooth immersions F(; t) : Mn ! Rn+k of submanifolds in Rn+k moving by mean curvature ow @F @t = ~H, where ~H is the mean curvature vector for the evolving submanifold. We prove that for any n 2 and k 1, the ow starting from a closed submanifold with small L2-norm of the traceless second fundamental form contracts to a round point in nite time, and the corresponding normalized ow converges exponentially in the C1-topology, to an n-sphere in some subspace Rn+1 of Rn+k.

Uniform asymptotic estimates in a time-dependent renewal risk model with stochastic investment returns

In this paper we consider a time-dependent renewal risk model with stochastic investment returns. The investment of an insurer is described as a portfolio of risk-free and risky assets whose price process is a geometric Levy process. When the claim-size distribution belongs to the intersection of the class L and the class D , we obtain an asymptotic formula for the tail probability of discounted aggregate claims, which holds uniformly for all nite time horizons. The same asymptotic formula for the nite-time ruin probability is also obtained.

Finite time singularities for the free boundary incompressible Euler equations

In this paper, we prove the existence of smooth initial data for the 2D free boundary incompressible Euler equations (also known for some particular scenarios as the water wave problem) for which the smoothness of the interface breaks down in nite time into a splash singularity or a splat singularity.

Los tres tiempos de Miguel Hernández: escritura e ideología

Este estudio pretende mostrar, aplicada a la obra de Miguel Hernández, la relación entre tiempo histórico, escritura e ideología: cómo la ideología de un escritor, o de un artista, entendida ésta como el conjunto de sus respuestas prácticas a los sucesos del tiempo material histórico en que vive, condiciona inevitablemente el desarrollo, el alcance y la naturaleza de su escritura –o de su obra– de un modo práctico, material y comprobable en términos críticos. Esto es –para entendernos–, que incluso el «valor estético» –formal o estrictamente literario–, entendido éste en su significación más clásica, se vincula y viene a estar condicionado –positiva o negativamente– por la ideología de los autores; pues son las ideologías finalmente las que escriben y crean los textos y los objetos artísticos.

Anti-Müllerian hormone, follicle-stimulating hormone, antral follicle count, and clinical findings as predictive markers of menopause in late reproductive-aged women

Menopause is defi ned as the absence of natural menstruation for more than 1 year and is an important marker of endocrine and reproductive changes in women; this condition refers to permanent loss of fertility. The basic change observed in this reproductive senescence is depletion of oocytes in the ovaries, and these changes occur over a wide age range (40 to 60 years) [1] rather than at a defi nite time point. This period is a dynamic transition with respect to clinical and endocrine changes. The Stages of Reproductive Aging Workshop (STRAW) classifi cation system is now widely used for categorizing the menopausal transition period, according to ANTI-MULLERIAN HORMONE, FOLLICLE-STIMULATING HORMONE, ANTRAL FOLLICLE COUNT, AND CLINICAL FINDINGS AS PREDICTIVE MARKERS OF MENOPAUSE IN LATE REPRODUCTIVE-AGED WOMEN Sun Mie Kim, MD, PhD, Seok Hyun Kim, MD, PhD, Jung Ryeol Lee, MD, Byung Chul Jee, MD, PhD, Chang Suk Suh, MD, PhD, Joong Yeup Lee, MD, Ki Chul Kim, MD, PhD, Do Yeong Hwang, MD, PhD, Jung Gu Kim, MD, PhD, Shin Yong Moon, MD, PhD Department of Obstetrics and Gynecology, Seoul National University College of Medicine; Seoul National University Hospital Health Care System Gangnam Center; Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul; Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam; Hamchoon Women’s Clinics, Seoul, Korea

Spectral properties of stationary solutions of the nonlinear heat equation

In this paper, we prove that if is a radially symmetric, signchanging stationary solution of the nonlinear heat equation (NLH) ut u =juj u; in the unit ball of R N , N = 3, with Dirichlet boundary conditions, then the solution of (NLH) with initial value blows up in nite time if j 1j > 0 is suciently small and if > 0 is suciently small. The proof depends on showing that the inner product of with the rst eigenfunction of the linearized operator L = ( + 1)j j is nonzero.

Generalized Super-Twisting Observer for Nonlinear Systems

AbstractIn this paper it is proposed a novel Lyapunov based design of a generalized Super- Twisting Observer for a class of 2-dimensional nonlinear system. The observer can deal with systems whose states are composed of bounded nonlineaer functions. This is the main difference with the classical Super-Twisting observer, in which the second state is only the derivative of the .rst state. Working with a Strong Lyapunov Function it can be shown sufficient conditions to properly choose the observer gains to ensure .nite time convergence to the real states. The obsrver is tested in a mathematical model regarding to the reduced Glucose-Insulin process. The numerical results have shown a better performance of the observer with lineal compensators in comparison to the classical Super-Twisting Observer. The gains for the observer are designed in order to compensate a more general class of perturbations that appear in the suggested glucose-insuline nonlinear model.

Communication, timing, and common learning

We study the eect of stochastically delayed communication on common knowledge acquisition (common learning). If messages do not report dispatch times, communication prevents common learning under general conditions even if common knowledge is acquired without communication. If messages report dispatch times, communication can destroy common learning under more restrictive conditions. The failure of common learning in the two cases is based on dierent infection arguments. Communication can destroy common learning even if it ends in nite time, or if agents communicate all of their information. We also identify conditions under which common learning is preserved in the presence of communication.

Finite-time observation of the continuous and discrete state for a class of nonlinear switched dynamics

Abstract A class of nonlinear switched systems is studied, and a nite-time converging observer is proposed. The observer strategy is able to reconstruct, both, the continuous and discrete state of the switched system based on output measurements only. All modes of the switched system are required to satisfy certain observability-like and boundedness restrictions. The suggested observer is based on the high-order sliding mode approach. It provides a nite time converging estimate and, after the mode switchings, it features an arbitrarily fast transient to recover the correct (continuous and discrete) state estimate. A numerical example illustrates the performance of the proposed observer.

NUMERICAL QUENCHING FOR A SEMILINEAR PARABOLIC EQUATION WITH A POTENTIAL AND GENERAL NONLINEARITIES

This paper concerns the study of the numerical approximation a semilinear parabolic equation subject to Neumann boundary conditions and positive initial data. We find some conditions under which the solution of a semidiscrete form of the above problem quenches in a fi- nite time and estimate its semidiscrete quenching time. We also prove that the semidiscrete quenching time converges to the real one when the mesh size goes to zero. A similar study has been also investigated taking a discrete form of the above problem. Finally, we give some numerical experiments to illustrate our analysis.

GRÆNSELØS STRAF: Om grønlandsk indsathed i et dansk fængsel

The fi eldwork upon which this article is based took place among Greenlandic
 inmates in 2005 in two different prisons, Anstalten ved Herstedvester, Denmark
 and Anstalten for Domfældte in Nuuk, Greenland. We set out to investigate the
 affects of being sent from Greenland to Anstalten ved Herstedvester to serve a
 sentence of indefi nite time. Analytically we combine the two places into one
 social space, as our informants in Anstalten ved Herstedvester experience the one
 place through the other. They have all served a sentence in prisons in Greenland
 and they combine these experiences in understanding their present context. Even
 though the structure of Anstalten ved Herstedvester is characterized by transparent
 boundaries and the opposite applies to Anstalten for Domfældte in Nuuk, the
 prisoners all have diffi culties navigating in the social space. In Herstedvester the
 rare visits and leaves become a mediator of life inside and outside society. Even
 though these are desired, they are also experienced as expressions of a life, which
 is diffi cult to imagine since they feel locked in time and space. Their experience
 of time is characterised by permanance, which creates ignorance and insecurity,
 and they feel locked in time and without agency because of the encircled social
 space. “Home” is another important element of life in prison, but one that almost
 impossible to obtain. The convicts fi nd a feeling of at-homeness by smoking
 marijuana. However, some of our informants chose to stop smoking and were
 thereby able to receive a reduction of their time in prison.

Comparative Testing of Experts

We show that a simple \reputation-style test can always identify which of two experts is informed about the true distribution. The test presumes no prior knowledge of the true distribution, achieves any desired degree of precision in some xed nite time, and does not use \counterfactual predictions. Our analysis capitalizes on a result due to Fudenberg and Levine (1992) on the rate of convergence of supermartingales. We use our setup to shed some light on the apparent paradox that a strategically motivated expert can ignorantly pass any test. We point out that this paradox arises because in the single-expert setting, any mixed strategy for Nature over distributions is reducible to a pure strategy. This eliminates any meaningful sense in which Nature can randomize. Comparative testing reverses the impossibility result because the presence of an expert who knows the realized distribution eliminates the reducibility of Nature’s compound lotteries.