Study of Hydrolysis Kinetics & Lactone-Acid- Salt Equilibria of γ-D-Mannonoiactone

698-69

Self-organized flows in phase-synchronizing active fluids

Many active biological particles, such as swimming microorganisms or motor-proteins, do work on their environment by going though a periodic sequence of shapes. Interactions between particles can lead to the phase-synchronization of their duty cycles. Here we consider collective dynamics in a suspension of such active particles coupled through hydrodynamics. We demonstrate that the emergent non-equilibrium states feature stationary patterned flows and robust unidirectional pumping states under confinement. Moreover the phase-synchronized state of the suspension exhibits spatially robust chimera patterns in which synchronized and phase-isotropic regions coexist within the same system. These findings demonstrate a new route to pattern formation and could guide the design of new active materials.Comment: 6 pages, 3 figure

Pengaruh Dosis dan Waktu Pemberian ZPT Dekamon 22,43 L Terhadap Pertumbuhan Tanaman Tembakau Deli (Nicodana tabacum L) di Pebibitan

Penelit:ian ini dilaksanakan di kebun percobaan Fakultas Pertanian Universitas Medan Area, yang berlokasi di desa Sampali, Kecamatan Percut Sei Tuan, pada ketinggian tanah 12 meter dari pennukaan laut. Lokasi penelitian bertofografi datar, jenis tanah Alluvial dengan tekstur liat lempung berpasir, pH tanah lebih 6.5 clan dilaksanakan pada bulan Juni sampai dengan Agustus 1999 Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) faktorial dengan dua faktor perlakuan, yaitu : 1. Faktor dosis ZPT Dekamon 22,43 L (notasi D, 2. Faktor waktu pemberian Dekamon 22.43 L (notasi W

Eine Frage der Einstellung

Die vorliegende Arbeit untersucht die äußeren Einflüsse auf Spracheinstellungen und Sprach-gebrauch, insbesondere des lokalen Doric, von Einheimischen und Zugezogenen in Pitmedden (Aberdeenshire). Zur Differenzierung der verschiedenen extralinguistischen Einflüsse auf die Sprecher nutzt die Autorin in ihrer Analyse dieser Varietät des Mid Northern Scots sowohl qualitative und quantitative Forschungsmethoden und kommt dabei zu dem Ergebnis, dass sowohl Standard English als auch Doric einen hohen Stellenwert in der Bevölkerung haben, jedoch unterschiedlich genutzt werden

Stability Analysis and Clustering of Electrical Transmission Systems

A proper understanding and modelling of the behaviour of heavily loaded large-scale electrical transmission systems is essential for a secure and uninterrupted operation. In this paper we present a descriptive analysis especially of low frequency oscillations within an electricity network and methods to assess the stability of the whole system based on an ARMAX model and the ESPRIT algorithm. Further we present two methods to separate the network into local areas, which is necessary for an efficient modelling of a large electrical system. The first method has its foundation in the results of the ARMAX based stability analysis and the second method concentrates on the network topology. In the last part of this paper we present an approach how an modelling of such local areas within an large electrical system based on stochastic differential equation models is possible