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In practice, the values of the machining variables (cutting speed, feed and depth of cut) are determined either by mere experience as usually done by machine tool operators or selected from the Barbour Prix Veste available engineering tables which is the usual practice for engineers and technologists. Both methods do not take the process constraints into consideration and merely depend on the personal experience of the employed personnel and hence lead to values which are too far from the economic values. The present paper present a technological optimization technique for turning operations. A computer program has been developed for this purpose, by means of which those optimum values of the machining variables can be obtained, which satisfy the encountered technical and technological constraints and lead to minimum manufacturing cost or maximum production rate as required.
To investigate nursing students' knowledge of and attitudes about problem-based learning (PBL).
A total of 1200 students were surveyed at eight nursing colleges in Hunan Province.
In all, 1037 valid questionnaires were returned, for an effective return rate of 86.4%. Some 54.4% of the students learned that PBL was a pedagogical method from teachers, and 27.8% of the students had participated in PBL courses. Almost all of students (97.6%) were interested in PBL, and Barbour Vente En Ligne 66.7% of survey participants believed that students who were not good at solving problems would have difficulty in PBL courses.
Nursing educators should guide students to adapt to new learning Barbour France Catalogue approaches, and encourage students to participate in the teaching reform to promote students' autonomous learning ability, innovation ability, and comprehensive ability.
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