Spatiotemporal Stochastic Resonance in Fully Frustrated Josephson Ladders

We consider a Josephson-junction ladder in an external magnetic field with half flux quantum per plaquette. When driven by external currents, periodic in time and staggered in space, such a fully frustrated system is found to display spatiotemporal stochastic resonance under the influence of thermal noise. Such resonance behavior is investigated both numerically and analytically, which reveals significant effects of anisotropy and yields rich physics.Comment: 8 pages in two columns, 8 figures, to appear in Phys. Rev.

Numerical modelling of mass transfer for solvent-carbon dioxide system at supercritical (miscible) conditions

A numerical procedure of mathematical model for mass transfer between a droplet of organic solvent and a compressed antisolvent is presented for conditions such that the two phases are fully miscible. The model is applicable to the supercritical antisolvent (SAS) method of particle formation. In this process, solute particles precipitate from an organic solution when sprayed into a compressed antisolvent continuum. Effects of operating temperature and pressure on droplet behavior were examined. The CO2 critical locus and the conditions for which the densities of solvent and carbon dioxide are equal are identified. Calculations were performed using Peng-Robinson equation of state. The model equations were put into the form that allowed the application of the Matlab standard solver pdepe. Calculations with toluene, ethanol, acetone (solvents) and carbon dioxide (antisolvent) demonstrated that droplets swell upon interdiffusion when the solvent is denser than the antisolvent and shrink when the antisolvent is denser. Diffusion modeling results might be used for data interpretation or experiments planning of the more complex real SAS process

Textural and rheological properties of stevia ice cream

Ice cream contains high sugar content and therefore it is in contradiction with the concept of healthy diet. The objective of this study is to determine the suitability of using stevia as an alternative natural sweetener in making ice cream. In-house ice cream formulation (as the control) and three different concentrations of stevia ice cream formulations of (A, B and C) were used. Physical properties of the ice cream such as the overrun, total soluble solid, meltdown rate, rheology, and textural properties were evaluated. All ice cream samples exhibited a non-Newtonian flow with pseudoplastic behavior. Stevia ice cream has a lower melting rate and has a higher sustainability. The power law also showed that apparent viscosities of stevia ice cream were higher. Therefore, stevia can be used as a natural sugar substitute in ice cream production

Penerapan Prinsip Arsitektur Bioklimatik dalam Perancangan Tropical Orchid Centre

Orchid grows and estimated has 5.000 species in Indonesia. However, nowdays there are many human activities, inflicting a destruction of ecosystem, which resulting a lessening orchid's habitat species. Conservation is needed to maintain the continuity of species of orchids. The design of conservation center to be developed is Tropical Orchid Center that serves as nature tourism, education, and research. Since influenced by good climate, the capacity of sunlight, air humidity, and air temperature, the Bioclimatic Architecture will be applied to the design of this Tropical Orchid Center. The concept of "Walk in The Rainforest” is applied to the site design, the shape of the building, the facade, and the landscape

Perancangan Sekolah Alam Bahari Bandar Bakau di Dumai

Green school is an informal school wich focus on character education for children about the preservation of the nature coast. For that the green school of bahari bandar bakau became a place in accordance with the curriculum of basic education to optimize green school of bandar bakau informal standards become formal. In the design this green school of bahari bandar bakau will be done with the contextual approach coastal architecture within the Dumai coastal areas, also uses the concept of archipelago built space values so that the green school can remember and demonstrated the importance values of the archipelago built space. Some indicators which become the state of the art is sustainablility, harmony of nature, the climate response, collective consciousness, intelligence and knowledge of the culture as a basic for generating design of green school in accordance with national curriculum standards and contextual with the maritime environment