Efficient sharing of a continuous-variable quantum secret

We propose an efficient scheme for sharing a continuous variable quantum secret using passive optical interferometry and squeezers: this efficiency is achieved by showing that a maximum of two squeezers is required to replicate the secret state, and we obtain the cheapest configuration in terms of total squeezing cost. Squeezing is a cost for the dealer of the secret as well as for the receivers, and we quantify limitations to the fidelity of the replicated secret state in terms of the squeezing employed by the dealer.Comment: 7 pages, 3 figure

ALBANIAN LAND MARKET ACTION PLAN: PURPOSES, ACHIEVEMENTS, LESSONS

The transition in Eastern Europe and the Commonwealth of Independent States from command to market-oriented economies requires new land market institutions and policies. Once privatization of land has moved far enough to permit and stimulate demand for market transactions, the question becomes one of establishing dynamic land markets (i.e., a growing volume of transactions) that also "work properly." Concerning the transition in the ownership and management of real property and the resultant efforts to create new land market institutions, the experience of Albania is instructive, and this paper outlines the establishment of an Albanian land market strategy. In the discussion of a market-oriented economy in Albania, the question was how to create the land market component of the transition following privatization of land. Four market characteristics were identified as goals: (1) the land market should be dynamic, that is, there should be numerous transactions; (2) acquisition of land through these transactions should be by people who make productive investments; (3) all sectors of the population should participate in the market as buyers and sellers of land rights; and (4) people's investments in land through these market transactions should result in sustainable uses of land so as to assure the environmental rights of future generations. This paper presents the effort to address these goals through the Land Market Action Plan, prepared by Albanian government with the assistance of the Land Tenure Center.Land titles--Registration and transfer--Albania, Land use--Government policy--Albania, Institution building --Albania--Evaluation, Technical assistance--Albania--Evaluation, Land administration--Albania, Project appraisal--Albania, Land markets--Albania, Land Economics/Use,

The 2007 Provincial Election and Electoral System Referendum in Ontario

Ontario’s general election in Oct. 10, 2007, was unprecedented for several reasons. The election was held on a date fixed by legislation and not one set by the premier or his caucus, something new to Ontario and relatively new to Canadian politics. Turnout declined to 53%, the lowest ever in Ontario history. The incumbent Liberals won a second consecutive majority government, something the party had not achieved since 1937. And finally, the election featured a referendum question that asked voters in Ontario to approve reforms to the electoral system, a proposal that was overwhelmingly rejected. This article explores each of the above-stated elements as they unfolded in the election

Integral D-Finite Functions

We propose a differential analog of the notion of integral closure of algebraic function fields. We present an algorithm for computing the integral closure of the algebra defined by a linear differential operator. Our algorithm is a direct analog of van Hoeij's algorithm for computing integral bases of algebraic function fields

Comparative clinico-haematological analysis in young Zebu cattle experimentally infected with Trypanosoma vivax isolates from tsetse infested and non-tsetse infested areas of Northwest Ethiopia

Background: Ethiopia, particularly in the Northwest region, is affected by both tsetse and non-tsetse fly transmitted trypanosomosis, with significant impact on livestock productivity. The aim of this study was to determine and compare clinical findings and haematological values between experimental infections induced by Trypanosoma vivax isolates from areas of either transmission mode. Sixteen young (aged between 6 and 12 months) Zebu cattle (Bos indicus), purchased from a trypanosome-free area and confirmed to be trypanosome-negative, were randomly assigned into four groups of four animals. Groups 1, 2 and 3 were infected with an isolate from a tsetse infested or one of two isolates from a non-tsetse infested area, and group 4 was a non-infected control. All animals in the infected groups were inoculated intravenously with 2 × 106 trypanosomes from donor animals. The experimental animals were monitored for eight consecutive weeks post infection for clinical signs, parasitaemia and haematological changes in packed cell volume (PCV), haemoglobin concentration (Hgb), total red blood cell (RBC) and white blood cell (WBC) counts, differential WBC count and blood indices (mean corpuscular volume [MCV], mean corpuscular haemoglobin and mean corpuscular haemoglobin concentration).<p></p> Results: Infection was characterized by reduced feed intake, weakness, pyrexia, parasitaemia, rough hair coat, enlarged prescapular lymph nodes, lacrimation, weight loss, pallor mucus membrane and dehydration. Body weight loss in all infected groups was significantly higher than in the non-infected control. Similarly, body weight loss was higher (P < 0.001) in animals infected with the tsetse infested isolate than with the non-tsetse infested isolates. The mean PCV, Hgb, total RBC and WBC counts were lower (P < 0.001), and mean MCV was higher (P = 0.01) in all infected groups than in non-infected control animals at different time points during the study period. Except for minor variations in haematological values, the overall changes were similar in all infected groups.<p></p> Conclusion: Clinical signs and significant reduction in haematological values in the infected groups indicated the pathogenicity of the T. vivax parasites. Pathogenicity of T. vivax from the non-tsetse infested area can be considered as nearly as important as that of its counterpart derived from the tsetse infested area

Flowering During January in Antigonish County, Nova Scotia

Over 85 records of 23 species of blooming, herbaceous angiosperms were made at 19 sites in Antigonish County between 7 and 21 January 2006, when daytime temperatures reached 15°C. These observations followed an unusually warm fall and early winter. All species were observed on waste ground or in fields and garden plots, except for Epigaea repens L. which was part of ground vegetation in a sparsely wooded site. The primary families represented were Asteraceae (six species), Brassicaceae (six species) and Carophyllaceae (four species). The most commonly observed plants were Taraxacum officinale (L.) Weber (11 sites), Capsella bursa-pastoris (L.) Medik. (nine sites), Thlaspi arvense L. (three sites) and Stellaria media (L.) Vill. (four sites). Many plants and inflorescences were conspicuously frost-damaged, and flowers were rarely fully open. In several species, e.g., T. arvense and Cerastium vulgatum L., many individual plants looked normal and there was no evidence of frost damage. These observations are the latest flowering records for Nova Scotia

Application for a Change Agent Strategy in Dissemination of an Australian Innovation

Several excellent reviews of the general education change and innovation literature exist and this literature indicates that a widely adopted strategy for planned development and dissemination of curriculum innovations has been the Research, Development and Diffusion (RD&D) model. This empirical-rational strategy involves the initial development of teacher-proof curriculum packages followed by mass dissemination which assumes that teachers\u27 adaptation and translation problems have been largely anticipated and accommodated. The RD&D strategy, however, has recently provoked increasing skepticism because teachers and schools often have failed to adopt new curriculum materials, to implement them in ways envisaged by the developers, or to continue their use for a sustained period. These problems have led to the conclusion that the manner in which an innovation is introduced is as important to its effectiveness as the qualities of the innovation itself