This paper investigates the closed-loop dynamics of systems controlled via parallel estimators. This structure arises in formation flying problems when each spacecraft bases its control action on an internal estimate of the complete formation state. For LTI systems a separation principle shows that the necessary and sufficient conditions for overall system stability are more stringent than the ...

It is widely accepted that photosynthetic bacteria played a crucial role in Fe(II) oxidation and the precipitation of iron formations (IF) during the Late Archean-Early Paleoproterozoic (2.7-2.4 Ga). It is less clear whether microbes similarly caused the deposition of the oldest IF at ca. 3.8 Ga, which would imply photosynthesis having already evolved by that time. Abiological alternatives, suc...

The main goal in this paper is to use a dual equivalence in automata theory started in [RBBCL13] and developed in [BBCLR14] to prove a general version of the Eilenberg-type theorem presented in [BBPSE12]. Our principal results confirm the existence of a bijective correspondence between formations of (non-necessarily finite) monoids, that is, classes of monoids closed under taking epimorphic ima...

A reaction from various kinds of nitroquinoline with hydroxylamine in potassium hydroxide alkalinity produced a novel product, furazanoquinoline, besides the known amino derivatives. The products obtained were furazano [3,4-f] quinoline (5) from 5-nitroquinoline (1) and 6-nitroquinoline (6), and furazano [3,4-h] quinoline (10) from 7-nitroquinoline (8) and 8-nitroquinoline (11). The reaction me...

Control of vehicle formations has emerged as a topic of significant interest to the controls community. In applications such as microsatellites and underwater vehicles, formations have the potential for greater functionality and versatility than individual vehicles. In this thesis, we investigate two topics relevant to control of vehicle formations: optimal vehicle control and cooperative contr...

We review the enabling theory for the decentralized and cooperative control of formations of unmanned, autonomous vehicles. The decentralized and cooperative formation control approach combines recent results from dynamical system theory, control theory, and algebraic graph theory. The stability of vehicle formations is discussed, and the applicability of the technology concept to a variety of ...

BACKGROUND AND PURPOSE Recent advances in data-processing techniques have allowed more accurate MR-based volumetric measurement than was possible in the past. The purpose of this study was to use this technique to evaluate the development of the temporal lobes in childhood. METHODS The study group consisted of 42 subjects aged 3 weeks to 14 years (mean age, 5 years), all with normal findings ...

Dengan kemajuan teknologi Informasi yang memanfaatkan internet maka website menjadi salah satu keunggulan digunakan oleh banyak kalangan dalan menyebarkan informasi. menggunakan web akan memudahkan proses berjalanya informasi lebih cepat dan dapat di akses semua orang. Sebuah sekolah juga membutuhkan sebuah untuk mengembangkan sebagai saran tentang sekolah. Oleh karena itu dibuatlah SMP Negeri ...

It is important for clinicians to understand how adults who stutter construct who they are, i.e. their self-identity, in order to offer personally meaningful interventions. Early research on stuttering and self-concept provided initial knowledge, but there has been a dearth of further research in this field. This article, the third in a series of papers emanating from a doctoral study, provides...