نتایج جستجو برای: foundry
تعداد نتایج: 1673 فیلتر نتایج به سال:
B. Gal, K. Granat, D. Nowak, Wroclaw University of Technology, Department of Foundry Engineering, Plastics and Automation and Automation, Wrocław, Poland The presented basic research was aimed at determining a correlation between compaction degree of moulding sand and its permittivity εr at 2,45·10 9 s-1. The measurement results make a basis for mathematical description of a multilayer technolo...
A lot sizing and scheduling problem from a foundry is considered in which key materials are produced and then transformed into many products on a single machine. A mixed integer programming (MIP) model is developed, taking into account sequence-dependent setup costs and times, and then adapted for rolling horizon use. A relax-and-fix (RF) solution heuristic is proposed and computationally teste...
This paper discusses the possible introduction of hidden reliability defects during CMOS foundry fabrication processes that may lead to accelerated wearout of the devices. These hidden defects or hardware Trojans can be created by deviation from foundry design rules and processing parameters. The Trojans are produced by exploiting time-based wearing mechanisms (HCI, NBTI, TDDB and EM) and/or co...
M. Łucarz, AGH University of Science of Technology, Engineering of Faculty Foundry, Kraków, Poland The paper presents the results of the research on the used moulding sands subjected to mechanical and thermal reclamation at different stages of the process in the foundry. The research on thermal treatment was carried out in an experimental thermal reclamation appliance. The effects of the proces...
The Open Biomedical Ontology (OBO) Foundry initiative is a collaborative effort for developing interoperable, science-based ontologies. OBO uses the Basic Formal Ontology (BFO) as its upper ontology. Ontologies developed for OBO use include some that have been ratified, and others holding the status of candidate. There are no formal, principled criteria that a candidate ontology must meet for r...
Ontologies are built in a variety of circumstances, for different applications. Some are quite small and built with minimal consideration (or need) for extensibility. Others, such as many of the large-scale efforts in the OBO Foundry, have a team of developers, domain specialists and collaborators actively engaged in interactive development [1-2]. The size of the ontology, or the complexity of ...
this study deals with employing foundry sand (fs) as new low cost iron source in heterogeneousphoto-fenton process for the degradation of herbicide isoproturon (ipu) in aqueous solution. thecharacterization of the fs by eds confirmed presence of iron (23%) required for photo-fenton andsimultaneously confirmed absence of any heavy metals which may be susceptible to leaching. the photo-fenton eff...
A. Kmita, AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, Krakow, Poland. J. Zych, M. Holtzer, J. Mocek, AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland. S. Piasny, Engineering Enterprise HARDKOP, Trzebinia, Poland. The aim of the investigations was the development of the protective coating and the method of it...
OBJECTIVE The aim was to describe cause specific mortality among steel foundry workers and to determine if any part of the experience may be due to occupation. DESIGN Historical prospective cohort study. SETTING Nine steel foundries in England and one in Scotland. SUBJECTS 10,438 male production employees first employed in the period 1946-65 and with a minimum period of employment of one ...
OBJECTIVES A cross sectional prospective study was carried out among iron foundry workers (exposed) and soft drink bottling and supply company workers (unexposed) to assess their occupational exposure to ambient respiratory dust in their work environment and its effect on their lung function profile. PARTICIPANTS Lung function was measured in 81 exposed and 113 unexposed workers. Personal res...
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