In this paper, we dscribe the measurement of brain activity during lathe operation in a VR lathe environment by near-infrared spectroscopy. The results show that the trials with sounds of processing, oxyHb tended to increase in the auditory area during lathe operation. On the other hand, oxyHb didn't change in in the auditory area. The results also show that oxyHb tended to increase in in the f...

Rhodamine B, a fluorescent substance, was used as a tracer to investigate in vitro early microleakage from around amalgam restorations in machinable mica glass-ceramic after thermal stress. Five types of amalgam, i.e., low-copper spherical, low-copper lathe-cut, high-copper admixture, high-copper lathe-cut, and high-copper spherical, were examined in the present study. The results indicated tha...

This paper mainly analyses the issues of the temperature distributions of the headstock assembly of a CNC lathe incorporating contact behavior. The thermal deformation is due to the heat generation in the bearings, chucking cylinder and motor. Experiments were carried out on a slant bed 2 axis CNC lathe for a period of 14 hours under a specified load cycle. Since heat generated in the machine t...

In this study, the prediction of surface roughness heights Ra and Rt of turned surfaces was carried out using neural networks with seven inputs, namely, tool insert grade, workpiece material, tool nose radius, rake angle, depth of cut, spindle rate, and feed rate. Coated carbide, polycrystalline and single crystal diamond inserts were used to conduct 304 turning experiments on a lathe, and surf...

Introduction: Superior adhesive strength in luting agents is of paramount significance in fixed partial denture success. In this in vitro study five cements were tested for retentive qualities, using both lathe-cut and hand-prepared specimens. Materials and methods: A total of 104 freshly extracted tooth specimens were prepared. Seventy of them were lathe-cut and 30 specimens were hand-prepared...

A Virtual reality environment with hypermedia was designed to help undergraduates understand the structure and functioning of a turning lathe. Study 1 was carried out with 30 novice students and Study 2 involved 24 students attending a machining course. These studies demonstrated that the virtual lathe can foster the comprehension of some core machining concepts. Further, the studies suggest th...

The paper describes the application of an expert system to develop the carbide cutting tools selection system for computer numerical control (CNC) lathe machine. The aim of the development is to select the optimum tool holder, carbide cutting tools, insert, feed rate, and turning speed for CNC lathe machine. The system is able to select the suitable tips tool based on the dimension, machining p...

A knowledge-based process-planning system for generating workplans for idealized lathe CNC machines is discussed. It transforms CAD-like diagrams of rotational-symmetric workpieces into abstract NC programs. To simplify development and evolution , declarative representations are used for all processing stages and steps, including a qualitative simulation of lathe turning. The version presented ...

Certain occupational groups are known to be at particularly high risk of developing allergic diseases. The objective of the present study was to evaluate the prevalence of allergic diseases among working adolescents. The International Study of Asthma and Allergies in Childhood questionnaire was used. Four hundred and thirty six adolescents working in motor, lathe-finish, coiffure and textile an...

Autism rates have risen to “epidemic” proportions, as we hear from media reports. Yet understanding why has so far been elusive, and a myriad of theories have been proposed, from changing diagnostic criteria to increased awareness to vaccines to different mating patterns increasing the likelihood of familial inheritance. In this book, Richard Lathe takes a scholarly approach to exploring a vari...