Conference Session

Teaching Topics in Aircraft Manufacturing

Collection

2007 Annual Conference & Exposition

Authors

Sergey Dubikovsky, Purdue University; Ronald Sterkenburg, Purdue University

Tagged Divisions

Aerospace

place to study, and AT308 is no exception to the rule. Upon completion of thiscourse, students have a much better grounding in the theoretical knowledge, which they first hearand see during lectures. They understand heat treatment and different tempers of aviation gradealuminum. They also realize the importance of following heat treatment processes to getconsistent properties of the materials. The well-equipped laboratory provides a place to apply thetheory and develop their skills. It becomes more than just paper knowledge - it is something theycan touch, make, assemble, and test. Experience is the best teacher. This is what studentsexperience during their "employment" in AT308, Inc.References1. Collicott, S. H., Increasing freshmen

Conference Session

Enhancing K-12 Mathematics Education with Engineering

Collection

2007 Annual Conference & Exposition

Authors

Michael Pelletier, Northern Essex Community College; Paul Chanley, Northern Essex Community College

Tagged Divisions

K-12 & Pre-College Engineering

Engineering Circuit Analysis, s-plane, 1 complex frequency Optics Snell's Law and Critical angle of reflection 1 Applications of radian measure Radian-degree conversions, Arc Length, Area 1 and degree equivalencies of a sector of a circle, Angular velocity and linear velocity, word problems. Logarithms and Natural Logs and Sound & Decibels, Time Constants, R-L and 1 Properties R-C electric circuits in the time domain. Statistics Data Interpretation, Statistical process control 1 Space Shuttle & NASA NASA Application

Conference Session

FPD12 -- Novel Approaches to First Year Programs

Collection

2007 Annual Conference & Exposition

Authors

Janet Meyer, Indiana University-Purdue University-Indianapolis; Nancy Lamm, Indiana University-Purdue University-Indianapolis; Joshua Smith, Indiana University-Purdue University-Indianapolis

Tagged Divisions

First-Year Programs

Director of Freshman Engineering and Director of the Engineering Dual Degree Program at IUPUI. She received her B.A. in Microbiology from Indiana University in 1969. In 1983, she received her B.S., in Interdisciplinary Engineering at Purdue University at Indianapolis and received her Purdue M.S.E. degree from IUPUI in 1989. Nancy advises beginning students and transfer students when first entering engineering programs. She has been teaching freshman engineering courses and advising freshman engineering students for over twenty years.Joshua Smith, Indiana University-Purdue University-Indianapolis Joshua S. Smith, Ph.D., is an Assistant Professor of Educational Psychology at Indiana University

Conference Session

Teaching Emerging Energy Technologies

Collection

2007 Annual Conference & Exposition

Authors

Radian Belu, Wayne State University; Alexandru Catalin Belu, Wayne State University; Lucian Cioca, University Lucian Blaga, Sibiu Romania

Tagged Divisions

Energy Conversion and Conservation

w (4)Where: Aw is the total swept area of the WTGs and effw is the efficiency of the WTGs andthe converters shown in Figure 1.b) Photo-Voltaic (PV) Arrays: The output power, PS (kW) a PV array of area ‘As’when subject to irradiance H (kW/m2) is given by PS = H ⋅ AS ⋅ eff s (5)Where: effs is the efficiency of the array and the corresponding converters shown inFigure 1.c) Fuel Cells: A fuel cell generates electricity directly through electrochemical reactions Page 12.31.5and is more efficient than a heat engine because it eliminates mechanical or

Conference Session

NSF Grantees Poster Session

Collection

2007 Annual Conference & Exposition

Authors

Deniz Gurkan, University of Houston; Alan Mickelson, University of Colorado at Boulder; Driss Benhaddou, University of Houston

can be addressed by simulation, by visual exposition, by analytical exercise and by actual manipulation of equipment and• to differentiate between the imperfection of our student' s learning and that of our teaching technique.The laboratories are conducted in two steps. First, students are given a simulation toperfrom as a pre-lab. The simulation gets students to be prepared for the lab and study theconcepts that will be dealt with. Then, students perform the lab using remotely-controlledequipment. Students write a report that is submitted through the rock website(http://www.tech.uh.edu/rock/remotelabs.php) (or any course management systems such

Conference Session

NSF Grantees Poster Session

Collection

2007 Annual Conference & Exposition

Authors

Ning Fang, Utah State University; Gary Stewardson, Utah State University

] Pellegrino, J. W., Chudowsky, N., and Glaser, R., Knowing What Students Know – The Science and Design of Educational Assessment, 2001, The National Academies Press, Washington, D.C.[5] Pei, Z. J., Deines, T., Hanna, S., and Lei, S., “Experience in a Technology-Based Instruction and Active Learning for a Manufacturing Course,” 2002, SME Technical Paper, No. ED02-259, pp. 1-8.[6] Wallace, D. R., and Weiner, S. T., “How Might Classroom Time Be Used Given WWW-Based Lectures,” 1998, ASEE Journal of Engineering Education 87, pp. 237-248.[7] Ertugrul, E., “New Era in Engineering Experiments: An Integrated and Integrative Teaching/Learning Approach, and Real-Time Visualisations,” 1998, International Journal of Engineering

Conference Session

Manufacturing Education Curriculum II

Collection

2007 Annual Conference & Exposition

Authors

David Farrow, University of Tennessee-Martin

Tagged Divisions

Manufacturing

more emphasis on processes than on analysis. Thus, Manufacturing Processesand Materials, Fourth Edition, by Schrader and Elshennawy10, was selected as the requiredcourse text. Published by the Society of Manufacturing Engineers (SME); the text ISBN numberis 0-87263-517-1.Course ScheduleThe course meets twice weekly for a 50-minute lecture and once weekly for a three-hour labperiod. The topics covered are listed in Table 1. The lectures consist primarily of PowerPointsummations of the topic(s) in concert with relevant video footage, the timing of which is shownin Table 2. The course flow is generally in the topical order of Schrader and Elshannawy.Students are expected to have read the relevant topical chapter(s) prior to lecture so as

Conference Session

Curriculum Development and Delivery Modes in Nuclear Engineering

Collection

2007 Annual Conference & Exposition

Authors

Sheldon Landsberger, University of Texas-Austin; Janet Ellzey, University of Texas-Austin; Brad Hull, University of Texas-Austin; Jessica Rosinski, University of Texas-Austin; James Wright, University of Texas-Permian Basin

Tagged Divisions

Nuclear and Radiological

. TOTAL 13 Table 3. Courses meeting UTPB undergraduate curriculum requirements. HRSSUBJECT REQ. COURSE(S) HRSLITERATURE 3 MASTERWORKS LIT. (W) 3MATH 6 DIFF./INTEGRAL CALC. 4 SEQ., SERIES, MULTI. CALC. 4VISUAL AND PERF. ARTS 3 ENGR. DESIGN 3POLITICAL SCIENCE 6 AMERICAN GOV'T I 3 AMERICAN GOV'T II 3ORAL

Conference Session

Multidisciplinary Design in the Classroom

Collection

2007 Annual Conference & Exposition

Authors

Robert Creese, West Virginia University; Deepak Gupta, West Virginia University

Tagged Divisions

Design in Engineering Education

• End load C. Density B. Uniform load D. Melting point E. Cost per unit weightLoad Conditions and Shape Parameters Support Selection Module Select the type of support(s) on the ends from the following: A. Simply supported ends B. Fixed ends C. Cantilever support

Conference Session

EMD Program Design

Collection

2007 Annual Conference & Exposition

Authors

Yesim Sireli, University of North Carolina-Charlotte; James Conrad, University of North Carolina-Charlotte; Martin Kane, University of North Carolina-Charlotte; Frank Skinner, University of North Carolina-Charlotte

Tagged Divisions

Engineering Management

White, C. C., III, “Key factors in the successful application of quality function deployment,” IEEE Transactions on Engineering Management, vol. 48, no. 1, pp. 81-95, February 2001.[3] Miller R. and Lessard, D., “Understanding and managing risks in large engineering projects,” International Journal of Project Management, vol. 19, pp. 437-443, 2001.[4] Bashir, H. A. and Thomson, V., “Metrics for design projects: A Review,” Design Studies, vol. 20, pp. 263-277, 1999.[5] Bayus, B. L., “An analysis of product lifetimes in a technologically dynamic industry,” Management Science, vol. 44, no. 6, 1998.[6] Flyvbjerg, B., Holm, M. S., and Buhl, S., “Underestimating costs in public works projects,” Journal of American Planning Association

Conference Session

Distance, Remote, and Virtual Experiments

Collection

2007 Annual Conference & Exposition

Authors

Richard Chiou, Drexel University; Yongjin Kwon, Drexel University; Shreepud Rauniar, Drexel University; Horacio Sosa, Drexel University

Tagged Divisions

Division Experimentation & Lab-Oriented Studies

, Issue 6, pp. 501-507.6. Ahn, S. H., Bharadwaj, B., Khalid, H., Liou, S. Y. and Wright, P. K., “Web-BasedDesign and Manufacturing Systems for Automobile Components: Architectures andUsability Studies,” International Journal of Computer Integrated Manufacturing, 15,pp.555–563, 2002.7. Feng, J., “Internet-Based Reverse Engineering,” International Journal of AdvancedManufacturing Technology, January, 2002.8. Hu, H., Yu, L., Tsui, P. W. and Zhou, Q, “Internet Based Robotic System forTeleoperation, Assembly, and Automation,” International Journal of AssemblyAutomation, Vol.21, No.2, pp.143-151, 2001. Page 12.952.159. Huang, G. Q. and Mak, K. L., “Web-integrated

Conference Session

Implementing the Civil Engineering Body of Knowledge into Courses and Curricula

Collection

2007 Annual Conference & Exposition

Authors

Matthew Roberts, University of Wisconsin-Platteville; Christina Curras, University of Wisconsin-Platteville; Philip Parker, University of Wisconsin-Platteville; Michael Penn, University of Wisconsin-Platteville; Max Anderson, University of Wisconsin-Platteville

Tagged Divisions

Civil Engineering

requirements be modified sothat students would use their general education classes to pursue a “theme.” For example,students could graduate with a theme in government by taking several general educationcourses on government and public policy. Other suggested themes were: Ethics Business Management Geography International Studies Engineering HistoryThe goal of the theme requirement would be to help students develop an area of competencyuseful to them in their future careers as citizen engineers. This theme requirement was in-spired by the curriculum ThreadsTM requirements employed by the College of Computing atthe Georgia Institute of Technology.9New Infrastructure Course(s)One goal of the revised curriculum is to create a

Conference Session

Multidisciplinary and Liberal Education

Collection

2007 Annual Conference & Exposition

Authors

April Kedrowicz, University of Utah; Bob Nelson, University of Utah

Tagged Divisions

Multidisciplinary Engineering

teami For an exception, see Seat, E. and Lord, S. M., “Enabling Effective Engineering Teams: A Program for Teaching Page 12.564.2Interaction Skills,” Journal of Engineering Education, Oct. 1999, pp. 385-390.pedagogy) is that students find themselves in patterns of unproductive team communication thatcan lead to conflicts. What is more, they may be ill-equipped to manage or resolve thoseresulting conflicts, and thus find themselves inadequately prepared to handle team issues in theworkplace.1-2The Department of Mechanical Engineering at a large Western University recently adopted aformalized, integrated communication and engineering

Conference Session

Learning Needs and Educational Success

Collection

2007 Annual Conference & Exposition

Authors

James Northern, Prairie View A&M University; John Fuller, Prairie View A&M University

Tagged Divisions

Minorities in Engineering

given sensor) the higher the value they return.2. Bumper sensors: Renee has four of these, one on the front, left, right and back. They return a "0" if Renee has bumped into something in that direction, and a "1" if she has not. Page 12.1193.93. Wheels: Renee's wheels can go forward and backwards as well as stopping. She can now do the following actions: Action Left Wheel Right Wheel Forward F F Left S F Right F S

Conference Session

Emerging Trends in Engineering Education Poster Session

Collection

2007 Annual Conference & Exposition

Authors

Stephen Thompson, University of South Carolina; Jed Lyons, University of South Carolina

.: National Academy Press.[7]The National Commission on Mathematics and Science. (2000). Before it's too late: Areport to the nation from the national commission on mathematics and science teachingfor the 21st century (EE0449P). Washington: U.S. Department of Education.[8] Mitchell, J., Levine, R., Gonzalez, R., Bitter, C., Webb, N. and White, P. (2003).Evaluation of the national science foundation graduate teaching fellows in K-12education (GK-12) program. Paper presented at the American Education ResearchAssociation, Chicago, IL, April, 2003.[9] Buck. G.A., Leslie-Pelecky, D. L., Lu, Y.(2006). Self-Definition of WomenExperiencing a Nontraditional Graduate Fellowship Program. Journal of Research inScience Teaching. 43(8) 852-73.\[10] Thompson, S

Conference Session

Assessment and Evaluation in Engineering Education I

Collection

2007 Annual Conference & Exposition

Authors

Mysore Narayanan, Miami University

Tagged Divisions

Educational Research and Methods

and Mills’ ideas.A comparison between Dr. Boylan’s research and author’s data is shown in Appendix G.[Copyright for VARK version is held by Neil D. Fleming, Christchurch, New Zealand andCharles C. Bonwell, Green Mountain, Colorado, USA]. Page 12.289.10APPENDIX B (Rubrics courtesy of W S U, Pullman, WA) Rubrics based on Likert Scale5 Has demonstrated excellence. Has analyzed important data precisely. Has provided documentation. Has answered key questions correctly. Evidence of critical thinking ability. Has addressed problems effectively. Very good performance

Conference Session

Faculty Reward System Reform

Collection

2007 Annual Conference & Exposition

Authors

Roger Olson, Rolls-Royce Corporation; David Quick, Rolls-Royce Corporation; Samuel Truesdale, Rolls-Royce Corporation; Dennis Depew, Purdue University; Gary Bertoline, Purdue University; Mark Schuver, Purdue University; Duane Dunlap, Western Carolina University; Donald Keating, University of South Carolina; Thomas Stanford, University of South Carolina

Tagged Divisions

Graduate Studies

of a national science policy forscientific research. 5The United States has not had a coherent policy during the last several decades for the graduatedevelopment of its domestic engineering graduates in the U.S. engineering workforce. These areengineers whose professional careers are not centered on academic scientific research, but ratherare centered on creating, developing, and innovating new, improved, and breakthroughtechnology in industry for competitiveness and the nation’s defense. (See Appendix G)Whereas the nation invested heavily during the 1960’s, 70’s, 80’s, and 90’s in the graduateeducation of the U.S. scientific workforce for basic academic research, we have not as a nationplaced a balanced emphasis in the further professional

Conference Session

Teaching Design in Manufacturing Curriculum I

Collection

2007 Annual Conference & Exposition

Authors

Priya Manohar, Robert Morris University; Cathleen Jones, Robert Morris University; Jon Radermacher, Robert Morris University

Tagged Divisions

Manufacturing

andsubsequently manufacture a look-alike or work-alike prototype of it. Students areexpected to keep a systematic record or logbook of all the activities. A tool can be akitchen, gardening, wood or metal working tool. A consumer product may be a tablelamp, broom, trashcan, a musical instrument, a toy etc. A detailed project report is to bewritten and a presentation is to be made based on the project work at the end of the term.Background: The course is delivered with an interdisciplinary approach. Engineeringstudents will form groups with students enrolled in Media Art (ARTM 3307 course) andMarketing (MARK 3700 course) departments. A typical group will consist of 2 - 3engineering students, 1 - 2 art student(s) and 5 – 7 marketing students, for total 8

Conference Session

Applied Mathematics

Collection

2007 Annual Conference & Exposition

Authors

S.K. Sen, Florida Institute of Technology; Gholam Ali Shaykhian, NASA

Tagged Divisions

Mathematics

Page 12.1256.2sequences (stretches) of the same digit(s), say, 1, the overall sequence might be random though.Long sequences of the same digits, even though generated by a random process would reduce thelocal randomness of a sample. That is, a sample could only be globally random for sequences of,say, 100,000 digits while it might not appear at all random when a sequence of less than 500digits is considered. Usually in a statistical environment, the numeric sequence need to be a large one (30 or moreentries) before we could talk about whether the sequence is random or not. For example, in atossing of a coin denoting a head by 1 and a tail by 0, if we get 15 0’s successively, can we saythat the coin is biased statistically? The answer is no

Conference Session

IT-based Instructional Technologies

Collection

2007 Annual Conference & Exposition

Authors

Edward Gehringer, North Carolina State University

Tagged Divisions

Information Systems

such game is Dyads. Participants write outa question on the material covered during the class, then pair up with another member of theclass. Each one of the pair asks the other his/her question. If the answer is correct, thequestioner writes his/her initials on the other person’s card. If it is incorrect, (s)he explains thecorrect answer. After finishing the first question, the members each find another partner andattempt to answer the new partner’s question. The winner is the member with the highest score.ii. Row competitions. Among the simplest of games is just to pass out index cards to the classmembers, and have them answer a set of review questions. Each student’s answers are checkedby a neighboring student. Then the cards are passed to

Conference Session

Hands-on Materials Science and Engineering

Collection

2007 Annual Conference & Exposition

Authors

Richard Griffin, Texas A&M University; Ibrahim Karaman, Texas A&M University; Ji Ma, Texas A&M University; Jeffrey Froyd, Texas A&M University; Jaime Grunlan, Texas A&M University

Tagged Divisions

Materials

-1 -1.5 -2 0 5 10 15 Carbon Black wt%Figure 3. Log Resistivity vs. % Carbon Black concentration- emulsion based Polyvinyl Acetatepolymer. Percolation limit appears to occur at 2% Carbon Black concentration1 www.nano.gov2 T. S. Creasy, J. C. Grunlan, and R. B. Griffin, “An Undergraduate Laboratory: the Effect of NanoparticleMicrostructure on the Electrical Properties of Polymer Nanocomposites,” Proceedings of IMECE06, ASME

Conference Session

Improving ME Education: Trends in Mechanical Engineering I

Collection

2007 Annual Conference & Exposition

Authors

Stephen McClain, Baylor University

Tagged Divisions

Mechanical Engineering

: The design of a co-generation power system supplying steam for a textile factory making fabrics for Mugatu Inc.’s “Derelicte Campaign” and producing 50 MW of power [14].2) Related to Cartoon Network’s animated Squidbillies: The design of a 100 MW power plant to provide power for Dan Halen Inc.’s future “Glug: Pine-Cone Liquor” distillery to be located in northwest Georgia [15].Each of the topics has great potential. While the movie Zoolander (2001) is already six yearsold, the co-generation system for Mugatu’s “Derelicte” campaign has excellent opportunities forcycle design assignments. The Zoolander premise would also allow the use of excellent adapted

Conference Session

Innovation in Construction Engineering Education II

Collection

2007 Annual Conference & Exposition

Authors

Gunnar Lucko, Catholic University of America; Panagiotis Tsopelas, Catholic University of America; Timothy Garland, Catholic University of America; Rodrigo Gonzalez, Catholic University of America; Thomas Lee, Catholic University of America; Justin Molineaux, Catholic University of America

Tagged Divisions

Construction

to $5B 5/27/03 3/25 and Afghanistan 6.1, 5.6 1,000 100’s 1,000’s 2,000 3/27/2002 1/26/01 India 7.7 20,085 166,836 - 1,122,000 1/13/01 El Salvador 7.7 852 4,723 - over 258,226 11/12/99 Turkey 7.1 894 4,948 - extensive 9/20/99 Taiwan 7.5 2,400 8,700 600,000 82,000, $14B 8/17/99 Turkey 7.4 17,118 50,000 500,000 $6.5B 1/25/99 Colombia 6.2 1,885 4,750 250,000 60% New 7/17/98

Conference Session

Climate Issues for Women Students

Collection

2007 Annual Conference & Exposition

Authors

Xiang-Yun Du, Aalborg University; Anette Kolmos, Aalborg University

Tagged Divisions

Women in Engineering

2003 2004 2005 2006During the 80’s women’s percentage increased on an average from less than 10% to more than 20 % atAalborg University, which was established in 1974 as a problem-based and project-based university.During the 90

Conference Session

Computer-Assisted Lab Studies

Collection

2007 Annual Conference & Exposition

Authors

Julio Garcia, San Jose State University; Patricia Backer, San Jose State University

Tagged Divisions

Division Experimentation & Lab-Oriented Studies

27 29 29Modal score(s) 23 (6) 27, 30, 31 (3) 29, 31 (3) 27 (5) 27 (5) 32 (5)Midrange 29 27 28 31 28.5 28Between the pre-test and the post-test, the mean score for 2005 increased by 1.8 points (or 3.6%),compared to 3.6 points (7.2%) for the 2004 cohort. The median score increased by 1 point,compared to 2 points in 2004. The modal score was lower than two of the 2004 modal scores.Overall, the pre-test and post-test scores were higher in 2005 than in 2004, but they showed lessimprovement.Considering individual students’ changes in test scores, fifteen of the twenty-four students (or62.5%) in 2005 improved their scores on the

Conference Session

Project and Model-Based Mathematics

Collection

2007 Annual Conference & Exposition

Authors

Sharlene Katz, California State University-Northridge; Bella Klass-Tsirulnikov, Sami Shamoon College of Engineering (formerly Negev Academic College of

Tagged Divisions

Mathematics

hardlims(x) = 4 5+1, x 2 0Thus the input of the single neuron is an R x 1 matrix p, and its final output is a scalar a =hardlims(Wp + b), depending upon whether the result n = Wp + b is positive or negative.A neural network can contain multiple neurons. Each neuron receives the same input vector, p,but produces a separate output. A network of S neurons has S outputs and can be represented ina manner similar to the single neuron network shown in figure 1. However, the weights are nowthe rows of a weight matrix W of size S x R. Accordingly, b, n, and a become column vectors oflength S, or S x 1 matrices. Thus, for an S neuron neural network with input p, we obtain Soutputs, which are contained in the S x 1 matrix

Conference Session

NSF Grantees Poster Session

Collection

2007 Annual Conference & Exposition

Authors

Ismail Fidan, Tennessee Tech University; Nasir Ghani, Tennessee Tech University

. Page 12.1237.1© American Society for Engineering Education, 2007 Remotely Accessible Laboratory for Rapid PrototypingAbstractThe Rapid Prototyping (RP) Laboratory1 was established in Fall 2003 and funded by theNational Science Foundation DUE 0311586 grant and Tennessee Tech University (TTU)matching support. Since this time, almost 500 high school students and student(s) studyingcomputer aided design/computer numerical control have practiced with RP technology. In orderto further extend a remote access capability to this current laboratory and let more engineeringand technology students learn this technology via online materials, a new NSF grant wasawarded in Summer 20062. Since this time, the remote RP laboratory development has

Conference Session

NSF Grantees Poster Session

Collection

2007 Annual Conference & Exposition

Authors

Denny Davis, Washington State University; Steven Beyerlein, University of Idaho; Olakunle Harrison, Tuskegee University; Phillip Thompson, Seattle University; Michael Trevisan, Washington State University

, and testing assessments was funded by theDivision of Undergraduate Education of the National Science Foundation under grant NSF/DUE0404924.Bibliography1. The National Academies (2006). Rising above the gathering storm. Washington, DC: National Academies Press.2. Anonymous (2006). The national engineering education research colloquies. Journal of Engineering Education, 95(4), 257.3. National Academy of Engineering (2004). The engineer of 2020: Visions of engineering in the new century. Washington, DC.: The National Academies Press.4. Davis, D., Beyerlein, S., and Davis, I. (2006). Deriving design course learning outcomes from a professional profile. International Journal of Engineering Education, 22(3

Conference Session

Engineering Without Borders: Programs Involving Students

Collection

2007 Annual Conference & Exposition

Authors

Wei Lin, North Dakota State University; Frank Peloubet, North Dakota State University; Huizhen Wang, Beijing Institute of Civil Engineering and Architecture; Yajun Zhang, Beijing Institute of Civil Engineering and Architecture

Tagged Divisions

International

. Steffen, G.D., and Hack, I., (2005) “Preliminary Investigation into Providing International Experience through Study Abroad for Engineering Technology Students,” Proceedings of the 2005 ASCE Annual Conference & Exposition, Portland, OR.4. Apple-Smith, J., Miner, S., and Riha, A., (2006) “Preparing Engineers for the Global Workplace: Iowa State University,” Proceedings of the 2006 ASEE Annual Conference & Exposition, Chicago, IL.5. Gerhardt, L.A. Blumenthal, P., and Spodek, S. (2002) “Educating the Global Engineer: A Program to Promote Study Abroad, International Exchanges and Diversity in Undergraduate Engineering,” Proceedings of the 2002 ASEE Annual Conference & Exposition, Montreal, Quebec.6. Melsa, J.L

Conference Session

Design of Lab Experiments I

Collection

2007 Annual Conference & Exposition

Authors

Lanny Griffin, California Polytechnic State University

Tagged Divisions

Division Experimentation & Lab-Oriented Studies

that the process of adhesionof cells from a liquid suspension onto solid substrates may be related to the free energy ofthe adhesion [2] (∆Gadh). ∆Gadh = γ cs − γ cl − γ sl (2)In Equation 2, the symbol γ represents the surface interfacial free energy and thesubscripts, c, s, and l refer to cell, solid, and liquid, respectively. Compare Equations 2and 1 – how are they similar? For net negative free energies (high γs), the conditions arefavorable for cellular adhesion, whereas, for a net positive free energy (low γs), theconditions are unfavorable (Figure 3).The cell-solid interfacial energy is dependent on the cell type and solid substrate, but itcan be calculated as [2] 2