The quantum basin hopping algorithm for continuous global optimisation combines a local search with Grover’s algorithm, and can locate the global optimum using effort proportional to the square root of the number of basins. This article establishes that Jordan’s quantum gradient estimation method can be incorporated into the quantum basin hopper, providing an extra acceleration proportional to ...

An artificial burrow was developed which fits into standard laboratory cages and significantly reduces stereotypic digging in gerbils. Also, the causes of bar-chewing were assessed experimentally. Neither the lack of gnawing material, nor the spatial proximity of cage-lid bars and food in the hopper nor the routine husbandry procedure of transferring juvenile gerbils to a fresh cage, but premat...

earlier version of this paper was presented to " South African Economic Policy under Democracy: A Ten Year Review " held at Mostertsdrift in Stellenbosch, 28/10/2005. Useful comments received from Murray Leibbrandt and Geeta Kingdon are gratefully acknowledged and the usual disclaimers apply. The work reported here is an outcome of a collaborative project between researchers at the

Steganography is the science of hiding the very presence of a secret message within a public communication channel. In Crypto 2002, Hopper, Langford, and von Ahn proposed the first complexitytheoretic definition and constructions of stegosystems. They later pointed out and corrected a flaw in one of their basic constructions. The correction, unfortunately, introduced a need for expensive errorc...

In this paper I propose that the principles of Emergent Grammar (Hopper 1987, 1998) can be applied to lexical semantics. I discuss three instances of discourse semantics to show why an emergent view of semantics can provide a realistic account of semantics in discourse. The three cases are: 1) emergence and negotiation of meaning due to participant interaction in discourse; 2) (re)distribution ...

Abstract Background Brown plant hopper (Nilaparvata lugens Stal.) a very damaging pest to rice crops. One of the efforts control it is use entomopathogenic fungi (EPF). Three fungal local isolates found in Indonesia were effective controlling brown pest. This study aimed molecularly identify 3 isolates. Molecular identification important get exact identity these fungi. The accuracy EPF will gre...

Developing countries offer potentially some of the most important growth opportunities for companies both from the developing as the developed world. It is therefore interesting to note that a recent review of the last twenty years of empirical research grounded in institutional theory found that most studies focused on developed countries (95 percent) and that only a small portion (five percen...

Conor Smyth, Iva Špakulová, Owen Cotton-Barratt, Sajjad Rafiq, William Tapper, Rosanna Upstill-Goddard, John L. Hopper, Enes Makalic, Daniel F. Schmidt, Miroslav Kapuscinski, Jörg Fliege, Andrew Collins, Jacek Brodzki, Diana M. Eccles, Ben D. MacArthur Mathematical Sciences, University of Southampton, Southampton SO17 1BJ, UK Cancer Sciences Academic Unit and University of Southampton Clinical ...

An unstable discharge rate occurs during dry fine powder from a hopper because of the significant two-phase solid/gas interactions that occur in flows. In addition, air bubble phenomenon may silo discharge. this study, we conducted experiments using semi-conical dual-structure hopper, and examined effects on internal flow structure, cavity fluid pressure, pressure inside airtight section, when ...