Autoimmune hypophysitis (AH) is commonly believed to be a rare chronic inflammatory condition of the pituitary gland. In clinical practice, however, the disease is often seen indeed. It typically presents with hypopituitarism and pituitary mass found by MRI. We report here unusual presentations of two females with AH followed by empty sella syndrome. The two females, aged at 64 and 57-years-old...

We study a variant of the chip-firing game called diffusion. In diffusion on a graph, each vertex of the graph is initially labelled with an integer interpreted as the number of chips at that vertex, and at each subsequent step, each vertex simultaneously fires one chip to each of its neighbours with fewer chips. Since this firing rule may result in negative labels, diffusion, unlike the parall...

A matrix A ∈ Rn×n is eventually nonnegative (respectively, eventually positive) if there exists a positive integer k0 such that for all k ≥ k0, A ≥ 0 (respectively, A > 0). Here inequalities are entrywise and all matrices are real and square. An eigenvalue of A is dominant if its magnitude is equal to the spectral radius of A. A matrix A has the strong Perron-Frobenius property if A has a uniqu...

An intriguing feature of positive $C_0$-semigroups on function spaces (or more generally Banach lattices) is that their long-time behaviour much easier to describe than it for general semigroups. In particular, the convergence semigroup operators (strongly or in operator norm) as time tends infinity can be characterized by a set simple spectral and compactness conditions. present paper, we show...

Face inversion effects are used as evidence that faces are processed differently from objects. Nevertheless, there is debate about whether processing differences between upright and inverted faces are qualitative or quantitative. We present two experiments comparing holistic processing of upright and inverted faces within the composite task, which requires participants to match one half of a te...

This paper is focused on the concept of an eventually periodic linear discrete-time system. We derive a necessary and su4cient analysis condition for checking open-loop stability and performance of such systems, and use this to derive exact controller synthesis conditions given eventually periodic plants. All the conditions derived are provided in terms of semi-de9nite programming problems. The...

There is overwhelming evidence that human intelligence is a product of Darwinian evolution. Investigating the consequences of self-modification, and more precisely, the consequences of utility function self-modification, leads to the stronger claim that not only human, but any form of intelligence is ultimately only possible within evolutionary processes. Humandesigned artificial intelligences ...

Business Transactions describe long-running operations that may span many discrete systems. This has been an area of research for many years [6],[15]. While these operations involve tasks that may or may not be transactional in the traditional sense, the business still wants many of the same Atomic, Consistent, Isolated, and Durable characteristics that we know and love. Providing ACID can be d...