The Bak-Sneppen Model on Scale-Free Networks

We investigate by numerical simulations and analytical calculations the Bak-Sneppen model for biological evolution in scale-free networks. By using large scale numerical simulations, we study the avalanche size distribution and the activity time behavior at nodes with different connectivities. We argue the absence of a critical barrier and its associated critical behavior for infinite size systems. These findings are supported by a single site mean-field analytic treatment of the model.Comment: 5 pages and 3 eps figures. Final version appeared in Europhys. Let

propnet: A Knowledge Graph for Materials Science

Discovering the ideal material for a new application involves determining its numerous properties, such as electronic, mechanical, or thermodynamic, to match those of its desired application. The rise of high-throughput computation has meant that large databases of material properties are now accessible to scientists. However, these databases contain far more information than might appear at first glance, since many relationships exist in the materials science literature to derive, or at least approximate, additional properties. propnet is a new computational framework designed to help scientists to automatically calculate additional information from their datasets. It does this by constructing a network graph of relationships between different materials properties and traversing this graph. Initially, propnet contains a catalog of over 100 property relationships but the hope is for this to expand significantly in the future, and contributions from the community are welcomed

Energy Harvesting from Roadways

AbstractThis paper presents a preview of an ongoing study to develop an energy harvesting system based on piezoelectric elements embedded into the pavements structure. The system development involved designing and testing a number of prototypes in the laboratory under controlled stress conditions. In addition, it involved numerical modeling of the stress distribution in the power generation module and economic analysis of the value of the electric power generated, under a given traffic composition scenario. The results available to date suggest that this technology shows promise in powering LED traffic lights and wireless sensors embedded into pavement structures

Development of an In-Field Real-Time LAMP Assay for Rapid Detection of Tomato Leaf Curl New Delhi Virus

Tomato leaf curl New Delhi virus (ToLCNDV) represents a threat to economically important horticultural crops. A real-time loop-mediated isothermal amplification (LAMP) assay for in-field ToLCNDV detection was developed, coupled to a rapid sample preparation method, and tested both in field and laboratory conditions on zucchini squash, tomato, and pepper samples. A set of six LAMP primers was designed for specific ToCLNDV detection, targeting a 218-nucleotide sequence within the AV1 gene. The sensitivity, specificity and accuracy of the real-time LAMP assay and comparison with canonical PCR were evaluated. The real-time LAMP assay developed was about one-thousand times more sensitive than the conventional PCR method, detecting a total of 4.41 × 102 genome copies as minimum target; no cross-reactivity was detected with the other geminiviruses used as the outgroup. The rapid sample preparation method allows for a reliable detection with a low reaction delay (≈2–3 min) compared to canonical DNA extraction, providing results in less than 45 min. Lastly, an increase in ToLCNDV-positive sample detection was observed compared to PCR, in particular for asymptomatic plants (85% and 71.6%, respectively). The real-time LAMP assay developed is a rapid, simple, specific, and sensitive technique for ToLCNDV detection, and it can be adopted as a routine test, for both in-field and laboratory conditions

Synthesizing Skyrmion Molecules in Fe-Gd Thin Films

We show that properly engineered amorphous Fe-Gd alloy thin films with perpendicular magnetic anisotropy exhibit room-temperature skyrmion molecules, or a pair of like-polarity, opposite-helicity skyrmions. Magnetic mirror symmetry planes present in the stripe phase, instead of chiral exchange, determine the internal skyrmion structure and the net achirality of the skyrmion phase. Our study shows that stripe domain engineering in amorphous alloy thin films may enable the creation of skyrmion phases with technologically desirable properties.Comment: 15 pages, 6 figures. Accepted for publication in Applied Physics Letter

Emerging properties of financial time series in the “Game of Life”

We explore the spatial complexity of Conway’s “Game of Life,” a prototypical cellular automaton by means of a geometrical procedure generating a two-dimensional random walk from a bidimensional lattice with periodical boundaries. The one-dimensional projection of this process is analyzed and it turns out that some of its statistical properties resemble the so-called stylized facts observed in financial time series. The scope and meaning of this result are discussed from the viewpoint of complex systems. In particular, we stress how the supposed peculiarities of financial time series are, often, overrated in their importance

Regresión de un caso de linfosarcoma canino tras un tratamiento inmunoquimioterápico

Presentamos un caso clínico de un linfosarcoma multicéntrico en un perro y su evolución con un tratamiento inmunoquimioterápico, apreciándose una regresión del proceso tumoral al final del mismo.We have reported a case report about a multicentríc lymphosarcoma in a dog and its evolution with an immunochemotherapeutic protocol. We noticed a total regresion of the tumor at the end of the treatment

REFLEJOS CULTURALES Y SOSTENIBILIDAD EN EL PROYECTO DE DISEÑO DEL MUSEO DE ARTE TEXTIL EN TAQUILE.

Este artículo presenta un análisis de la programación de un Museo de Arte Textil en la isla de Taquile, Puno, Perú, que tiene como objetivo la creación de un proyecto arquitectónico contemporáneo que respeta la identidad cultural y la sostenibilidad ambiental del ecosistema local. Para lograr esto, se llevó a cabo una investigación exhaustiva sobre la identidad cultural de la población taquileña, y se identificó la importancia de su cosmovisión andina y su textilería en la concepción del proyecto arquitectónico. Además, se evaluó la sostenibilidad ambiental del proyecto, y se encontró que el diseño incluye la atenuación de los impactos negativos y aprovecha los impactos positivos para asegurar su respeto al ecosistema local. Los resultados de esta investigación validan la hipótesis de que la programación de un Museo de Arte Textil en Taquile puede ser un proyecto contemporáneo con identidad sociocultural y sostenible. Se concluye que la inclusión de la identidad cultural y la sostenibilidad ambiental en la concepción de un proyecto arquitectónico es crucial para su éxito y relevancia en un mundo cada vez más consciente de la importancia de la diversidad cultural y la protección del medio ambiente. Este estudio contribuye significativamente a la comprensión de la relación entre cultura, identidad y arquitectura, así como al desarrollo sostenible en zonas culturalmente diversas. Además, ofrece una metodología y un enfoque para futuros proyectos arquitectónicos que busquen integrar la identidad cultural y la sostenibilidad ambiental en su concepción