Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1915

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1913

Sexual Size Dimorphism and Body Condition in the Australasian Gannet

Funding: The research was financially supported by the Holsworth Wildlife Research Endowment.

Impregnación en CO2 supercrítico de diferentes sustratos poliméricos, como alternativa a los tratamientos textiles, comúnmente empleados en el Mediterráneo

En el siguiente trabajo se realiza la impregnación de diferentes sustratos poliméricos con agentes biocidas y con un colorante textil, comúnmente empleados en los procesos de acabados textiles. En este estudio se realiza la selección del colorante Disperse Red 167 (DR167), mediante la comparación de solubilidad en CO2 supercrítico (scCO2) entre varios colorantes dispersos. Los agentes biocidas seleccionados han sido; esencia de clavo (eugenol) y aceite esencial de orégano. Se ha realizado la impregnación de diferentes sustratos poliméricos; poliéster (PES), polipropileno (PP), y algodón (CO), en diferentes condiciones. En total se realizaron impregnaciones utilizando diez concentraciones relativas del DR167. El objetivo principal es determinar las condiciones óptimas de procesado para cada sustrato. Para determinar el rendimiento de la tintura en scCO2 se han representado los diagramas cromáticos de las muestras tintadas en diferentes condiciones. Las muestras de PES son las que presentan mayor rendimiento de color, sabiendo que esta es la única fibra que presenta afinidad con el DR167. Para determinar el efecto de inhibición de las bacterias se han realizado ensayos de actividad antimicrobiana y actividad fungicida. Puede indicarse que sí se observó cierta actividad inhibitoria frente algunos microorganismos, como Staphylococcus aureus, mientras que no se observó una actividad inhibitoria importante frente a otros como Pseudomonas aeruginosa.

Does the consumer’s variety-seeking behavior condition the willingness to travel further?

The objective of this study is to test the effect of the consumer’s variety-seeking behaviour on the distance the tourist is prepared to travel; that is, his/her willingness to travel further. The empirical application is carried out in Spain in a context with 26 destinations, by applying Mixed Logit Models. The results evidence that the variety-seeking behaviour reduces the dissuasive effect of distance.

Seismic behavior of a masonry chimney with severe cracking condition: preliminary study

This paper presents a structural analysis of a masonry chimney built in the 1940s, which is currently being cataloged as local interest heritage. This structure has not served any industrial purpose for the last thirty years. The chimney is located in the town of Agost (Alicante - Spain) and directly exposed to the prevailing winds from the sea, as it is approximately 12 km away from the waterfront and there are not any significant barriers, which could protect the structure against the wind. There are longitudinal cracks and fissures all along the shaft because of the chimney’s geometrical characteristics, the effect of the masonry creep and especially the lack of maintenance. Moreover, there is also a permanent bending deformation in the upper 1/3 of the height due to the wind pressure. A numerical analysis for the static behavior against gravity and wind loads was performed using the structure’s current conditions after a detailed report of its geometry, its construction system and the cracking pattern. Afterwards, the dynamic behavior was studied, i.e. a seismic analysis using both response spectra and accelerograms in order to examine the structural stability. This work shows the pre-monitoring analysis before any experimental testing. Using the current results the future test conditions will be determined (e.g. number of sensors and monitoring point location, excitation systems, etc) prior to a possible structural reinforcement by applying composite material (fiber reinforced polymers).

Biodiesel production by transesterification of sludge in supercritical conditions

In this study wastewater treatment plant (WWTP) sludge was subjected to a reactive pyrolysis treatment to produce a high quality pyro-oil. Sludge was treated in supercritical conditions in the presence of methanol using hexane as cosolvent in a high pressure lab-autoclave. The variables affecting the pyro-oil yield and the product quality, such as mass ratio of alcohol to sludge, presence of cosolvent and temperature, were investigated. It was found that the use of a non-polar cosolvent (hexane) presents advantages in the production of high quality pyro-oil from sludge: increase of the non-polar pyro-oil yield and a considerable reduction of the amount of methanol needed to carry out the transesterification of fatty acids present in the sludge.

Is a cluster a necessary condition for success? The case of Benidorm

This paper analyses the application of the cluster concept to tourist destinations using Benidorm as a case study. A questionnaire was administered to tourism firms based in Benidorm in order to determine whether this destination currently constitutes a tourism cluster or whether it possesses the ideal characteristics to become a cluster with the private agents' collaboration, that is, whether it is a potential cluster. The results obtained from this research indicate that Benidorm's success is not derived from the presence of a cluster due to a series of elements that prevent its existence. In this destination there is a need to strengthen cooperation between public and private agents (especially in those areas that determine the competitive advantage of the destination) and to design a strategy based on shared goals. Both of these elements are fundamental for the characterisation of a cluster.

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1920

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1919

The condition of women workers under the present industrial system: an address by Ida M. Van Etten at the National Convention of the American Federation of Labor held at Detroit, Michigan, December 8th, 1890

At head of title: Publication of the American Federation of Labor.

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1921

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1923

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1908