156 research outputs found
Quantitative determination of zero-gravity effects on electronic materials processing germanium crystal growth with simultaneous interface demarcation experiment MA-060, section 5
The crystal growth and segregation characteristics of a melt in a directional solidification configuration under near zero g conditions were investigated. The germanium (doped with gallium) system was selected because it was extensively studied on Earth and because it lends itself to a very detailed macroscopic and microscopic characterization. An extensive study was performed of the germanium crystals grown during the Apollo-Soyuz Test Project mission. It was found that single crystal growth was achieved and that the interface demarcation functioned successfully. On the basis of the results obtained to date, there is no indication that convection driven by thermal or surface tension gradients was present in the melt. The gallium segregation, in the absence of gravity, was found to be fundamentally different in its initial and its subsequent stages from that of the ground based tests. None of the existing theoretical models for growth and segregation can account for the observed segregation behavior in the absence of gravity
Report of the committee on a commercially developed space facility
Major facilities that could support significant microgravity research and applications activity are discussed. The ground-based facilities include drop towers, aircraft flying parabolic trajectories, and sounding rockets. Facilities that are intrinsically tied to the Space Shuttle range from Get-Away-Special canisters to Spacelab long modules. There are also orbital facilities which include recoverable capsules launched on expendable launch vehicles, free-flying spacecraft, and space stations. Some of these existing, planned, and proposed facilities are non-U.S. in origin, but potentially available to U.S. investigators. In addition, some are governmentally developed and operated whereas others are planned to be privately developed and/or operated. Tables are provided to show the facility, developer, duration, estimated gravity level, crew interaction, flight frequency, year available, power to payload, payload volume, and maximum payload mass. The potential of direct and indirect benefits of manufacturing in space are presented
tranScriptorium: a european project on handwritten text recognition
The tranScriptorium project aims to develop innovative,
efficient and cost-effective solutions for annotating handwritten
historical documents using modern, holistic Handwritten
Text Recognition (HTR) technology. Three actions are
planned in tranScriptorium: i) improve basic image preprocessing
and holistic HTR techniques; ii) develop novel indexing
and keyword searching approaches; and iii) capitalize
on new, user-friendly interactive-predictive HTR approaches
for computer-assisted operation.The research leading to these results has received funding from the European Union’s Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 600707 - tranScriptorium.Sánchez Peiró, JA.; Mühlberger, G.; Gatos, B.; Schofield, P.; Depuydt, K.; Davis, RM.; Vidal, E.... (2013). tranScriptorium: a european project on handwritten text recognition. ACM. https://doi.org/10.1145/2494266.2494294
Figure Text Extraction in Biomedical Literature
Background: Figures are ubiquitous in biomedical full-text articles, and they represent important biomedical knowledge. However, the sheer volume of biomedical publications has made it necessary to develop computational approaches for accessing figures. Therefore, we are developing the Biomedical Figure Search engin
Rubber Clay Nanocomposites
The use of nanofillers allows the development of nanocomposites with improved properties and novel applications. The technological goal is possible due to the new compounding method that allows a particle dispersion in the nanometer scale increasing the specific surface area.Fil: Cova Sánchez, Mariajose. Instituto Nacional de TecnologÃa Industrial. Instituto Nacional de TecnologÃa Industrial - Caucho; Argentina. Universidad Nacional de San MartÃn. Instituto de Investigación e IngenierÃa Ambiental. - Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e IngenierÃa Ambiental; ArgentinaFil: Bacigalupe, Alejandro. Universidad Nacional de San MartÃn. Instituto de Investigación e IngenierÃa Ambiental. - Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e IngenierÃa Ambiental; Argentina. Instituto Nacional de TecnologÃa Industrial. Instituto Nacional de TecnologÃa Industrial - Caucho; ArgentinaFil: Escobar, Mariano Martin. Instituto Nacional de TecnologÃa Industrial. Instituto Nacional de TecnologÃa Industrial - Caucho; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Mansilla, Marcela Angela. Instituto Nacional de TecnologÃa Industrial. Instituto Nacional de TecnologÃa Industrial - Caucho; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentin
Consensus statement from the international consensus meeting on post-traumatic cranioplasty
Abstract: Background: Due to the lack of high-quality evidence which has hindered the development of evidence-based guidelines, there is a need to provide general guidance on cranioplasty (CP) following traumatic brain injury (TBI), as well as identify areas of ongoing uncertainty via a consensus-based approach. Methods: The international consensus meeting on post-traumatic CP was held during the International Conference on Recent Advances in Neurotraumatology (ICRAN), in Naples, Italy, in June 2018. This meeting was endorsed by the Neurotrauma Committee of the World Federation of Neurosurgical Societies (WFNS), the NIHR Global Health Research Group on Neurotrauma, and several other neurotrauma organizations. Discussions and voting were organized around 5 pre-specified themes: (1) indications and technique, (2) materials, (3) timing, (4) hydrocephalus, and (5) paediatric CP. Results: The participants discussed published evidence on each topic and proposed consensus statements, which were subject to ratification using anonymous real-time voting. Statements required an agreement threshold of more than 70% for inclusion in the final recommendations. Conclusions: This document is the first set of practical consensus-based clinical recommendations on post-traumatic CP, focusing on timing, materials, complications, and surgical procedures. Future research directions are also presented
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