Papers by John Long
Journal of Materials Processing Technology, 2009
The mass (e.g. carbon) transfer coefficient at a workpiece surface is an important kinetic factor... more The mass (e.g. carbon) transfer coefficient at a workpiece surface is an important kinetic factor to control the heat treatment process of the workpiece and to evaluate heat treatment equipment. The coefficient can be calculated from the carbon concentration at the surface of a sample carburized in a carburizing furnace for a given time. Two common measurement methods which use a thin plate and employ a component as samples respectively are evaluated and compared for sensitivity and uncertainty. The comparison shows that the use of a component produces higher measurement precision and also has the advantage in measuring the carbon transfer coefficients at different treated positions. This method is then extended and discussed methodologically. Also two equations are proposed to calculate the carbon transfer coefficient and its uncertainty, respectively. This method is also applied to measure the carbon transfer coefficient in a fluidized bed heat treatment furnace.
ISIJ International, 2004
The mass transfer during carburising in a fluidised bed and in a steel workpiece has been studied... more The mass transfer during carburising in a fluidised bed and in a steel workpiece has been studied experimentally in this work. This involved carburising experiment in an electrically heated fluidised bed at 900-970°C with natural gas and air as the atmosphere. A steel workpiece was designed to provide a range of carbon transfer surfaces of different geometries in the fluidised bed, and the carbon transfer coefficient was measured at these surfaces. The carbon transfer coefficient was determined from the carbon distribution within the diffusion layer of the sample. An empirical relationship of the carbon potential as a function of carburising atmosphere, bed temperature and fluidising velocity was determined, based on the understanding of the mass transfer mechanism and analysis of the experimental results.
Increasing numbers of engineering departments are interested in offering their programs by distan... more Increasing numbers of engineering departments are interested in offering their programs by distance education. These schools grabble with several difficulties and issues associated with distance education: course structure, communication with students, delivery of course material, delivery of exams, accreditation, equity between on-campus and off-campus students, and especially the delivery of practical training.
Conference Presentations by John Long
This paper describes the development of the mandatory residential school component of
accredited ... more This paper describes the development of the mandatory residential school component of
accredited distance education undergraduate engineering courses at Deakin University with
a particular focus on how the residential school program is implemented at level 1 (first-year
full-time equivalent level) of the courses.
To be compliant with accreditation requirements, since 2005 Deakin has conducted
residential schools for off-campus students at its Geelong Waurn Ponds Campus. Initially the
schools were conducted annually over two-weeks during the first semester, and have
transitioned to the current mode where the residential school is conducted as a one week
programme in each of the trimesters. During these schools, activities are organised around
the respective engineering-course units undertaken by students during the trimester.
We have found that advantages to the students who attends a residential school include
completing real practical work without the need to assemble their own materials at home,
and social engagement with staff and students. Off-campus students leave the residential
school with a sense of belonging to a “community”, “one of many doing the same and not the
only one”. They have the opportunity to share their often significant professional experience
with the generally younger and less experienced on-campus student colleagues. Through
this interaction between on-campus and off-campus students, the on-campus students
benefit as much as the off-campus students. The disadvantages to the off-campus students
is the requirement to travel to Geelong for an extended time, which costs the students both
money and time away from work and family.
Our residential schools for off-campus-mode students have been running for over 10 years.
We have found that the educational and social advantages to the student outweigh the
disadvantages.
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Papers by John Long
Conference Presentations by John Long
accredited distance education undergraduate engineering courses at Deakin University with
a particular focus on how the residential school program is implemented at level 1 (first-year
full-time equivalent level) of the courses.
To be compliant with accreditation requirements, since 2005 Deakin has conducted
residential schools for off-campus students at its Geelong Waurn Ponds Campus. Initially the
schools were conducted annually over two-weeks during the first semester, and have
transitioned to the current mode where the residential school is conducted as a one week
programme in each of the trimesters. During these schools, activities are organised around
the respective engineering-course units undertaken by students during the trimester.
We have found that advantages to the students who attends a residential school include
completing real practical work without the need to assemble their own materials at home,
and social engagement with staff and students. Off-campus students leave the residential
school with a sense of belonging to a “community”, “one of many doing the same and not the
only one”. They have the opportunity to share their often significant professional experience
with the generally younger and less experienced on-campus student colleagues. Through
this interaction between on-campus and off-campus students, the on-campus students
benefit as much as the off-campus students. The disadvantages to the off-campus students
is the requirement to travel to Geelong for an extended time, which costs the students both
money and time away from work and family.
Our residential schools for off-campus-mode students have been running for over 10 years.
We have found that the educational and social advantages to the student outweigh the
disadvantages.
accredited distance education undergraduate engineering courses at Deakin University with
a particular focus on how the residential school program is implemented at level 1 (first-year
full-time equivalent level) of the courses.
To be compliant with accreditation requirements, since 2005 Deakin has conducted
residential schools for off-campus students at its Geelong Waurn Ponds Campus. Initially the
schools were conducted annually over two-weeks during the first semester, and have
transitioned to the current mode where the residential school is conducted as a one week
programme in each of the trimesters. During these schools, activities are organised around
the respective engineering-course units undertaken by students during the trimester.
We have found that advantages to the students who attends a residential school include
completing real practical work without the need to assemble their own materials at home,
and social engagement with staff and students. Off-campus students leave the residential
school with a sense of belonging to a “community”, “one of many doing the same and not the
only one”. They have the opportunity to share their often significant professional experience
with the generally younger and less experienced on-campus student colleagues. Through
this interaction between on-campus and off-campus students, the on-campus students
benefit as much as the off-campus students. The disadvantages to the off-campus students
is the requirement to travel to Geelong for an extended time, which costs the students both
money and time away from work and family.
Our residential schools for off-campus-mode students have been running for over 10 years.
We have found that the educational and social advantages to the student outweigh the
disadvantages.