INDUSTRIAL HYGIENE VIRTUAL LABORATORY

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INDUSTRIAL HYGIENEVIRTUAL LABORATORY

• Timothy J. Ryan
• Ohio University
• Athens

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OVERVIEW

• Interactive Multimedia CD-ROM
• Still Photos
• Illustrations
• Videos
• Animations
• Text
• Data Entry

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OVERVIEW

• IHVL? i? vul
• Mac PC Compatible
• Developed for Autonomous or Distance Learning
• Used with Lectures

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IHVL Modules

• Calibrations
• Concepts
• Organic Vapors
• Grab Samplers
• Particulates
• Total
• Respirable

• Ventilation
• Indoor Air Quality
• Noise
• Thermal Stressors
• Bioaerosols
• Gas Vapors

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SimulatedScreen Progression
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Pedagogical Design Elements

• IH Concepts
• Equipment Familiarity
• Use Techniques
• Testing

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I. Concept Examples

• Air Flows as Volumetric
• Noise as Pressure Waves
• Aerosols as Polydisperse
• Work in Relation to Heat Load
• CFUs as a Function of Media

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Volumetric Air Flows
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Work and Heat Load
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II. Equipment Examples

• Everything is NEW to Students!

• Assembly of Sampling Trains
• Bioaerosol Stages
• Cyclonic Separators
• Pitot Tubes
• SLMs, OBAs, and Dosimeters

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Bioaerosol Stages
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Cyclonic Separators
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III. Technique Examples

• Calibrations
• Noise Surveys
• OBA Analysis
• Pitot Traverses
• Use of NIOSH Methods

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OBA Analysis
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Pitot Traverses
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IV. Testing Examples

• Basic Facts
• Competency in Skills Techniques
• Calculations
• Mastery of Concepts

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Skills Techniques
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Mastery of Concepts
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Validation Testing

• 10 Students, Groups A B
• Matched by
• Sex
• GPA
• Alternately Completed
• Virtual Sessions (IHVL)
• Traditional Sessions

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Validation Testing

• Controls
• Real-time Instruments All did Traditional
• Thermal Stress All did IHVL
• Graded on 10 pt Scale

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SCORES Group A (white) vs. Group B (gray)
SCORES
CALIB
GASES
VENT
BIOAER
PART
REALT
NOISE
THERM
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SCORES IHVL (white) vs. Traditional (gray)
SCORES
CALIB
GASES
VENT
BIOAER
PART
REALT
NOISE
THERM
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Student Comments

• Advantages
• Do it when I had the time
• Go back and repeat
• Convenient
• Do it at home
• Better time management
• Do at your own pace
• Inexpensive

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Student Comments

• Weaknesses
• Not having actual hands on
• I preferredto explore the equipment
• No Realtime Feedback
• User System Software Conflicts
• Loss of Group Dynamic

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IHVL Conclusions

• As Effective
• Distinct Advantages and Disadvantages
• Limitations
• Small Numbers
• Instructor as Evaluator
• Future
• Peer Review Additional Testing
• Integrate a Lab Practical Exam

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Published in ACSs Chemical Health Safety
Sept/Oct (2002), as a two part manuscript.