Literatura científica selecionada sobre o tema "Ti (Computer program)"

Abstract The structure of thermally sprayed deposit consists of individual lamellae formed from melted and re-solidified particles, along with unmelted and partially melted particles, pores, microcracks, and splat boundaries. The elastic modulus of a vacuum plasma sprayed Ti-6Al-4V alloy parallel to the splat plane determined by standard uniaxial tensile testing was found to be approximately 30% lower than that of conventionally processed materials with the same level of porosity. The relationship between the elastic modulus and the microstructure was studied using an in-situ tensile testing stage in an optical microscope combined with analytical and finite element models. An idealized microstructure was used for the analytical model, which yielded an estimate of the modulus higher than that measured. The finite-element program OOF was also used to compute the elastic modulus based on micrographs of polished and etched surfaces and predicted a reduction of about 37% in the modulus.

Practice has often proven that in many cases the multimedia technological applications (internet, media editing hardware and software platforms) can rise the quality of the educational act by optimizing the information transfer, pupils’/students’ development of specific competences, development of creativity and involving in common activities with the help of the internet. Nevertheless, a series of studies reveal the fact that teachers consider the student-teacher relation could not be replaced, even partially, by technology. The present paper presents the results of a study run in the 14 gymnasiums and high schools from Arges county and University of Pitesti. The purpose of the study is to identify the perception of the social-humanistic discipline teachers in pre-university education and of the students at the social-humanistic faculties (psychology, history, journalism), wishing to become teachers, on the use of ICT resources in the didactical process. Analyzing the perception of the teachers and students in the group on the efficiency of multimedia means in facilitating the transmission of knowledge and the shaping of pupils’ competences, in the judicious management of the time allocated to class teaching, in the differentiated treatment of pupils, in intermediating the pupil-teacher relationship, is among the objectives of this study. The research hypotheses of this study are: there are differences as regards students’ and teachers’ perception on the utility of multimedia means in facilitating the application of teaching-learning methods which are attractive and interactive for pupils; the existence of differences as regards students’ and teachers’ perception on the judicious management of the time allocated to class teaching through the use of multimedia means, the existence of differences as regards students’ and teachers’ perception on the individualization of training through the application of multimedia methods, the existence of differences as regards students’ and teachers’ perception on the intermediation of the pupil-teacher relationship through social media means. The methodology used in this investigative approach is the questionnaire applied to the social-humanistic discipline teachers in pre-university education and those students who attend the courses of the psycho-pedagogical studies program with certification for a teaching career and who have evaluated the university didactic staff. The study was carried out on a group of 41 socio-humanistic teachers and 56 third-year students of the University of Piteşti, in the social and human sciences field. Only third-year students were included in the group because the Computer Assisted Instruction was a subject studied during that year. Also during the third year students undertake pedagogical training and have access to schools in order to attend to lessons and to teach a certain number of hours. Findings and Results of this study have aimed at the verification of research hypotheses. The results have been processed and interpreted through descriptive and inferential statistical analysis. Three of these hypotheses have been confirmed and one has not been confirmed following data processing and interpretation. The conclusions further to the research provide relevant data for improving the ICT use methodology in the process related to the teaching of social-humanistic disciplines.

Next generation jet engine technologies are typically driven by performance, value and environmental challenges, and appropriate technologies are developed in international research programs. One on-going engine component technology project at an aerospace component manufacturer aims to develop an engine with less fuel consumption. A likely consequence is higher pressure in the core engine, which leads to higher temperature. One way to handle the higher temperature is using a more advanced Ti-alloy for the product component, which will render a different sustainability profile. One weakness in current decision situations is the inability to clarify and understand the “value” and “sustainability” implications compared to e.g. performance features of concepts. Both “value” and “sustainability” include a rich set of features important for successful introduction of new products and product-service solutions to the market. The purpose with this research is to provide decision support for companies in early development phases for assessment of value and sustainability consequences over product-service system lifecycles. A workshop was held with the aerospace component manufacturer and a value chain partner focusing on material handling, to: i) get a better understanding of activities, flows and ownership related to the studied materials at the two companies, ii) to understand the companies’ perspective at new suggested scenarios with regard to these materials, and iii) define relevant scenarios to look into more in depth from a sustainability and value perspective. Three different scenarios were developed with differences in ownership, responsibilities and value streams. It is therefore essential to be able to quickly assess and optimize consequences of such alternative scenarios. Based on the workshop experiences and scenarios, a modeling and simulation approach to assess sustainability and value consequences for the scenarios is proposed. The sustainability consequences are based on a sustainability life cycle assessment and a risk assessment. Key features of the proposed tool include: consideration of the time dimension, societal sustainability consequences, risk assessment, company value assessment, and cost/revenue perspectives.