Showing 4 results for Accelerator
Volume 0, Issue 0 (8-2024)
Abstract
Shotcrete, a pneumatically sprayed concrete mixture, has gained significant popularity in the construction industry due to its versatility and adaptability. However, the demand for high-strength shotcrete has intensified, driven by advancements in equipment and admixtures. Fiber-reinforced high-strength shotcrete (FRHSS) offers enhanced quality, adhesion, and construction speed, making it ideal for stabilizing excavations and slopes, strengthening masonry and concrete structures, and reinforcing underground structures. Additionally, the increased strength allows for reduced section dimensions, leading to more economical designs.
This research investigates the effects of aggregate gradation and admixtures, including micro silica, superplasticizer, accelerator, and micro recycled steel fibers (MRSFs), on the strength and performance of FRHSS. The study employs wet-mix and dry-mix shotcrete methods, examining the properties through laboratory and field experiments.
The results demonstrate that achieving high-strength shotcrete is more feasible with the wet-mix method. Fiber-reinforced wet-mix shotcrete attained a 28-day compressive strength of 987 kg/cm², representing an 80% and 77% increase in compressive strength and energy absorption, respectively, compared to conventional fiber-reinforced wet-mix shotcrete. Furthermore, fracture toughness tests revealed that MRSFs effectively prevent microcrack propagation and control deformations. FRHSS incorporating MRSFs exhibited a 28% and 97% increase in compressive strength and energy absorption, respectively, compared to the corresponding mix without fibers.
Volume 6, Issue 1 (12-2006)
Abstract
Many of the video processing algorithms cannot be implemented in real time on general computers, due to their computational complexity. For an efficient implementation, a custom hardware that can be reconfigured for the algorithm, is used. In this paper a new acceleration hardware based on FPGA elements is proposed. This hardware can be adapted with the processing algorithm through FPGA design reconfiguration. Using a PCI slot, this hardware communicates with a Pc. The FPGAs are programmed through the PCI slot. The video frames are supplied to this hardware for processing. The performance of this hardware is evaluated using warping algorithms. The first and second order warping for a 512*512 frame can be done in 7.9 ms.
Soode Mirmohamadi, Morteza Soltani, Fereidoun Mahboudi, Meysam Shahbazi,
Volume 13, Issue 2 (1-2023)
Abstract
This study investigates the factors affecting the commercialization of products in medical biotechnology accelerators, it also demonstrates the priority of these factors. The research is applied and descriptive survey. It has been done in two phases, qualitative and quantitative. Based on the general purpose of this study, to provide a framework for the commercialization of products in medical biotechnology accelerators, we interviewed with informed experts. 62 sub-codes were obtained as effective factors in the commercialization of products in medical biotechnology accelerators, which were classified into 5 main dimensions including individual, organizational, industry and competition, institutional and product. These dimensions are presented as a framework. In the quantitative phase, the main dimensions as well as the sub-themes were ranked in the main dimension. Finally, the priority of the main dimensions was as follows: 1. Individual (personality, behavioral and mental characteristics of the mentor and manager) 2. Industry and competition (interaction with pharmaceutical companies as customers, investors, etc.) 3. Organizational (experience of startup teams, codified strategy, R&D, etc.) 4. Product (value added and high-tech) 5. Institutional (government is pragmatic to the country's slogans, interaction with government managers, etc.).
Volume 27, Issue 2 (7-2020)
Abstract
Aims: This study is aimed at developing a university-based incubators taking into account accelerators. The university-based incubators are one of the key elements of sustainable entrepreneurial ecosystems, which act as the entrepreneurship ombudsman. Improving the model’s incubators would foster innovation and commercialization of research. Methods: This study, using a qualitative approach based on Grounded theory, was conducted through the theoretical sampling and data gathering from among 18 academic entrepreneurs who could benefited from acceleration centers services, incubators managers and experts, accredited managers and experts in accelerators as well as experts in the field of research concepts. Also, the data were analyzed using interview tools during three common coding steps in the Glaser approach. Conclusion: The findings show that the acceleration characteristics in the incubator model are determined by the indicators identified in this study as center features. Accelerator-based incubators need to use strategies such as modeling successful international examples, validating ideas and business, accessing to the Internet to achieve their goals. Finally, the results indicate the impact of environmental contexts and such as stakeholders. Applying the resulting model can lead to various outcomes such as promoting the interests of academic entrepreneurs, creating jobs, transferring knowledge and technology, creating sustainable business, creating new businesses and social benefits.
