Conference Session

Fostering and Assessing Effective Teaming

Collection

2008 Annual Conference & Exposition

Authors

Steve Roach, University of Texas-El Paso; Elsa Villa, University of Texas-El Paso

Tagged Divisions

Educational Research and Methods

"gcej"qvjgt"cejkgxg"vjgkt"cpf"vjg"itqwrÓu"iqcnu" 16,p. 3:12 0"Vjg"itqwrÓu"cevkqpu"cpf"dgjcxkqtu"tghngev"vjgkt"eqooqp"xcnwgu"cu"vjg{"ceeqornkuj"vjgkt"goals together through reflection and discourse 16, 23-25.The faculty members at UTEP have transferred key features of the ARG model to the PLTLmodel and are using it to support students who are in their first three semesters of the computerscience course sequence. This enhanced model maintains attributes of the traditional PLTLmodel; however, cooperative learning elements are embedded throughout all aspects of theenhanced model to include both the staff development activities and the PLTL sessions

Conference Session

Venturing Out: Service Learning, Study Abroad, and Criterion H

Collection

2008 Annual Conference & Exposition

Authors

David Ollis, North Carolina State University; Anthony Smith, CPE-LYON FRANCE

Tagged Divisions

Liberal Education

Page 13.1121.2Bell note that “Student writers often do better work when readings reflect their specialinterests”, and thus justify their assembly of The World of Science: An Anthology forWriters4 We similarly here explore our French experience in combining foreignlanguage, lecture, and engineering laboratory as a bridge between engineering and aforeign culture. The present CPE-Lyon combination of foreign language and laboratoryinstruction would appear to satisfy Ashby’s need to provide “culture through a man’sspecialty,”, to provide an example of Florman’s “bridges” between engineering and thehumanities, and to offer exercises consistent with the Liethhauser-Bell counsel that“student writers often do better when readings reflect their

Conference Session

Global Engineering Education Initiatives

Collection

2008 Annual Conference & Exposition

Authors

Edmundo Tovar; José Carrillo; Jesús García

Tagged Divisions

International

VIEWPOINTS TO DEVELOP QUALITY POLICIES IN ENGINEERING PROGRAMS IN EUROPEAN HIGHER EDUCATION AREAAbstractQuality assurance in Higher Education is by no means only a European concern. All over theworld there is an increasing interest in quality and standards, reflecting both the rapid growth ofhigher education and its cost to the public and the private purse. Accordingly, if Europe is toachieve its aspiration to be the most dynamic and knowledge-based economy in the world, thenEuropean Higher Education will need to demonstrate: it takes the quality of its programmes andawards seriously and is willing to put into place the means of assuring and demonstrating thatquality. The initiatives and

Conference Session

Engineering Ethics: Using Case Studies

Collection

2009 Annual Conference & Exposition

Authors

William Loendorf, Eastern Washington University

Tagged Divisions

Engineering Ethics

and reflection in order to reach anethical decision. All of the potential scenarios encountered by practicing engineers could neverbe covered in one code of ethics. They are principles and standards to follow and not a cookbooksolution outlining steps to resolve every ethical situation.MethodologyA junior level course was developed a number of years ago titled Technology in WorldCivilization (Loendorf17, 2004) that was designed to broaden the students' perspective of pasttechnologies and how they were discovered and used. The main objectives of the course were to:(a) promote awareness of technological development, and (b) provide a rudimentaryunderstanding of their social, political, economic, and cultural impact. Three years ago, alearning

Conference Session

Global Engineering Education: Developments, Implementations

Collection

2009 Annual Conference & Exposition

Authors

Edmundo Tovar, Polytechnic University, Montegancedo; Paola Carina, Universidad Politécnica de Madrid; Karen Castillo, Universidad Politécnica de Madrid

Tagged Divisions

International

AC 2009-2268: SUCCESS CRITICAL FACTORS FOR IMPLEMENTING QUALITYSYSTEMS IN EUROPEAN HIGHER EDUCATIONEdmundo Tovar, Polytechnic University, MontegancedoPaola Carina, Universidad Politécnica de MadridKaren Castillo, Universidad Politécnica de Madrid Page 14.1093.1© American Society for Engineering Education, 2009 CRITICAL SUCCESS FACTORS FOR IMPLEMENTING QUALITY SYSTEMS IN EUROPEAN HIGHER EDUCATIONAbstractQuality assurance in higher education is by no means only a European concern. All over theworld there is an increasing interest in quality and standards, reflecting both the rapid growthof higher education and its cost to the

Conference Session

Trends in Construction Engineering Education II

Collection

2009 Annual Conference & Exposition

Authors

Amitabha Bandyopadhyay, State University of New York; Jamil Lacourt, State University of New York, Farmingdale

Tagged Divisions

Construction

building has an undergroundparking facility that can accommodate more than 50% of the occupants’ vehicles. Thebuilding has EPMD system with Solar Reflective Index of -1. The building utilizes abuilding management system for lighting control. The building does not have apermanent site irrigation system for landscaping. The building does not use any methodsto reduce the use of municipality provided potable water for building sewageconveyance. This building does not have on-site renewable energy system. However, thisbuilding has a system to re-use condensate return from base building system to re-heatglycol for snow and ice melting for the lobby exterior paving. The building is locatedwithin one half mile of ten of the basic services (bank, library

Conference Session

The Best of Design in Engineering Education

Collection

2009 Annual Conference & Exposition

Authors

Oenardi Lawanto, Utah State University; Scott Johnson, University of Illinois

Tagged Divisions

Design in Engineering Education

, strategiclearning, and achievement.1, 2, 3 Although the findings contribute positively to educationalpractices, knowledge of how those attributional beliefs, strategic learning, and achievement arerelated in ill-structured, problem solving activities is still limited. Few of those studies providein-depth information on the mental interaction between students’ personal reflections about theirknowledge states and abilities and the actual action that may take place during the problemsolving activities. Furthermore, many of the studies involve working on hypothetical problemsthat do not reflect the authentic learning contexts that students may encounter in their classroomactivities. Hypothetical problems are generally simple, and clear instructions lead to

Conference Session

Capstone Design I

Collection

2009 Annual Conference & Exposition

Authors

James Widmann, California Polytechnic State University; Lynne Slivovsky, California Polytechnic State University; Brian Self, California Polytechnic State University; J. Kevin Taylor, California Polytechnic State University

Tagged Divisions

Design in Engineering Education

devices to allow greater inclusion of persons with disabilities in recreational activities.Adaptive physical activity projects are well-aligned with the goals of service learning andprovide rich open-ended design experiences for students. This paper provides a framework foraligning capstone and service learning outcomes.BackgroundService-learning occurs when “Students engage in community service activities with intentionalacademic and learning goals and opportunities for reflection that connect to their academicdiscipline” (Cress et al, 2005)1. Reflection is an integral part of learning and helps to developcritical thinking skills (Jacoby, 1996; Tsang, 2000; Tsang, 2002)2,3,4. The development of thesecritical thinking skills enables engineering

Conference Session

Potpourri

Collection

2009 Annual Conference & Exposition

Authors

John Krupczak, Hope College

Tagged Divisions

Technological Literacy Constituent Committee

Energy Sub function Materials InformationFigure 2: Illustration of a Hypothetical Device Subfunction Structure. Page 14.905.9Figure 3: Functional Analysis Description of a Hair DryerBenefits of Functional ThinkingIn using functional analysis, or functional thinking, as a framework or method to describe howthings work from an engineering perspective, a number of benefits are realized. These can besummarized as: 1. The method reflects an approach or method of understanding technology that is characteristic of

Conference Session

Factors Affecting Student Performance

Collection

2006 Annual Conference & Exposition

Authors

Abel Fernandez, University of the Pacific; Camilla Saviz, University of the Pacific; Jeff Burmeister, University of the Pacific

Tagged Divisions

Educational Research and Methods

homework assignment grades.This seeming contradiction prompted a study to examine, at an individual student level,the relationships between homework assignment grades and traditional courseperformance outcome measures; i.e., quizzes, tests and final examination.Substantial homework is dogmatically accepted as an indispensable component ofengineering courses. Faculty reflect on their own education and proudly maintain atraditionally heavy homework load as a rite of passage, while students resignedly acceptthe heavy workload as part of the cost of entering into the engineering profession. Thenature of engineering, as with other hard sciences, is such that conceptual and practicalunderstanding comes from applying principles and techniques to solve

Conference Session

Emerging Trends in Engineering Education Poster Session

Collection

2006 Annual Conference & Exposition

Authors

Elliot Douglas, University of Florida

68.70a: Difference between the two groups is significant at p<0.05.b: Percentage of correct answers out of the total number answered. Page 11.374.5In order to understand the difference in the ability of the two groups to complete the instrument,the students were asked to reflect on their experience. The only guidance they were given wasthat there was a desire to explain a surprising difference in the ability of some students tocomplete the instrument. Table 2 shows the general codes developed from the responses, and thenumber of responses that could be identified with each code. It should be noted that in Table 2 asingle participant’s response

Conference Session

Defining Technological Literacy

Collection

2006 Annual Conference & Exposition

Authors

W. Bernard Carlson, University of Virginia

Tagged Divisions

Technological Literacy Constituent Committee

,social or religious goals. I suspect that these student assumptions reflect the dualismprevalent in modern thought that separates the material world from the world of ideas;technology is about “stuff” and “stuff” is dealt with by markets and business whilepolitics, society, and religion are the realm of beliefs, ideas, and abstractions, all of whichare ethereal and not affected by material considerations. Given that students tend to find it easy to think about technological and economicchange and are less familiar with the interplay of technology and political power orreligious beliefs, the examples offered here focus on themes relating first to religion andthen politics. While there are other ways that people use technology to shape

Conference Session

Minorities in Engineering Division Technical Session 7

Collection

2017 ASEE Annual Conference & Exposition

Authors

Jinny Rhee, San Jose State University; Camille Johnson, San Jose State University; Clifton M. Oyamot Jr., San Jose State University

Tagged Topics

Diversity

Tagged Divisions

Minorities in Engineering

that thesense of belonging in women students is consistently higher in departments where they arerepresented in higher numbers9. At Arizona State University, the long-term effects to a suite ofstrategies designed to increase sense of belonging were found to be an increase in retention from0.9% per year to 1.6% per year in their undergraduate engineering cohorts from 1998 to 201310.Four areas were identified at the University of Washington as being important to thedevelopment of community and belonging of ethnic minority students: co-curricular activities,peer support, faculty/department support, and residence programs. They found that supportmechanisms changed with time and responsive strategies should reflect that11. Sophomore andjunior level

Conference Session

Innovative Pedagogies for Facilitating Student-driven Learning Experiences

Collection

2017 ASEE Annual Conference & Exposition

Authors

Steven Kurtis Younkin, Iowa State University; Peter T. Savolainen, Iowa State University

Tagged Divisions

Civil Engineering

professional development tool.Dr. Peter T. Savolainen, Iowa State University Dr. Peter Savolainen is an Associate Professor in the Iowa State University (ISU) Department of Civil, Construction and Environmental Engineering. His research includes fundamental and applied projects focused on traffic operations, safety, and driver behavior, as well pedagogical approaches to improve transportation engineering education. Dr. Savolainen currently serves on the editorial advisory boards of Accident Analysis and Prevention and Analytic Methods in Accident Research. Dr. Savolainen’s peda- gogical efforts are reflected by his selection as a fellow by the American Society of Civil Engineers(ASCE) Excellence in Civil Engineering

Conference Session

First Year Computing Topics

Collection

2017 ASEE Annual Conference & Exposition

Authors

Krishnendu Ghosh, Miami University; Michele D Dickey, Miami University; Laurena Werner, Miami University

Tagged Divisions

Computers in Education

procedural steps and important concepts in the assignment. e. My group was satisfied with how our assignments turned out.The aforementioned assignment helped the students to demonstrate their project based on theirimplementation and also, critique the projects of other students who were members of theirgroup. The in-class assignment and reflection gave exposure to other student projects. Also, theinstructor provided feedback on the Software version 1.0 and additional features wererecommended to be incorporated in Software version 2.0.Software version 2.0: Modify the Software version 1.0 based on the feedback received. State clearly how you have incorporated the feedback in Software version 2.0.The assignment, Software version

Conference Session

Engineering Identity

Collection

2017 ASEE Annual Conference & Exposition

Authors

Justin Charles Major, University of Nevada, Reno; Adam Kirn, University of Nevada, Reno

Tagged Divisions

Educational Research and Methods

required to complete a group bridge-building project in which they utilized the entirety ofthe engineering design process to design, analyze, build, and test a balsa bridge, given materialand size limitations.Journal Development and AdministrationAfter bridge testing, students were offered five points of extra credit on a 1000-point scale tocomplete a 15 to 30-minute short-answer journal entry, found in Appendix A, regarding theirexperience of designing, building, and testing the bridge project. Use of student reflections, suchas journals, have been shown to allow students to find better meaning in the work they have done,and to be beneficial towards students experience of completing design projects14.Online Learning Management Software was used

Conference Session

Electrical and Computer Division Technical Session 1

Collection

2017 ASEE Annual Conference & Exposition

Authors

Aldo Morales, Pennsylvania State University, Harrisburg; Sedig Salem Agili, Pennsylvania State University, Harrisburg

Tagged Divisions

Electrical and Computer

chosenafter extensively investigating and inquiring opinions from working signal integrity engineers. Thetextbook “Signal and Power Integrity - Simplified (2nd Edition)” is one of the most used byindustry, with very high rating by technical readers.EE 497A INTRODUCTION TO SIGNAL INTEGRITY FOR INTERCONNECTS (4) Catalog Data: Transmission lines and reflections, lossy lines, rise time, material properties, cross talk in transmission lines. Time and frequency domain measurements, jitter. Prerequisite: E E 330, E E 352. (Note 3 hour lecture and 3 hour lab per week) Eric Bogatin, Signal and Power Integrity - Simplified (2nd Edition), Textbook Prentice Hall, 2009

Conference Session

SED Technical Session: Instructional Experiences

Collection

2019 ASEE Annual Conference & Exposition

Authors

Paul T. Grogan, Stevens Institute of Technology; Olivier Ladislas de Weck, Massachusetts Institute of Technology

Tagged Divisions

Systems Engineering

of cash on hand at the end of a round, typically timed to about 20-30 minutes, with noresidual value for unsold inventory. Vehicles intended to be sold must identically match a masteror blueprint provided to each team at the start of a round. The customer can reject a sale for anyquality defects such as missing components, misplaced components, or incompletely attachedcomponents. The penalty for non-quality should be quite large as it reflects warranty costs in thereal world which can be very significant [16]. Quality defects can lead either to confiscation,financial penalty, or return of the vehicle to the manufacturer for warranty service.3.2 Physical Components: LEGO Brick VehiclesVehicles require about 20-40 individual LEGO brick parts

Conference Session

Minorities in Engineering Division Technical Session 6

Collection

2020 ASEE Virtual Annual Conference Content Access

Authors

Sarah Hug, University of Colorado, Boulder; Wendy Chi, University of Colorado, Boulder

Tagged Topics

Diversity

Tagged Divisions

Minorities in Engineering

the authors are team members as socialscientists and program evaluators, and reflect upon decision making, initial data collection andanalyses, and how the reframing of impact studies with an eye towards QuantCrit and criticaltheory shifted the focus of the study of the S-STEM programs.Critical theoryEducational researchers who study K12 and higher education bring out the inequity ineducational resources, support systems, curriculum, and outcomes across multiple categories ofprivilege and oppression, such as gender, ethnicity, country of origin, first language, race, andincome. Critical educational researchers problematize these inequities, and focus ontransformative educational practices that move past providing similar experiences for all

Conference Session

Understanding Student Development in Design

Collection

2018 ASEE Annual Conference & Exposition

Authors

Samantha Paige Moorzitz, The College of New Jersey; Manuel Alejandro Figueroa, The College of New Jersey

Tagged Topics

Diversity

Tagged Divisions

Design in Engineering Education

 recent  alumnus  who  has  a  vision  impairment.    Reflections:   After   completing   the   low   vision   simulation,   students   were   asked   to   write   a  reflection   of   their   experience   in   the   course   online   discussion   forum.   Participants   were   asked   to  post  a  response  to  the  prompt  below  and  also  post  two  replies  to  their  classmate’s posts.       “Describe  your  experience today  wearing  the  low  vision  simulation  goggles/   blindfolds.  What  did  you  learn  about  living  with  a  vision  impairment?  Did  this   activity  help  you  break  any  misconceptions  that  you  held  in  the  past?”    The   qualitative   analysis   of   their   primary

Conference Session

Student Division Technical Session 1

Collection

2018 ASEE Annual Conference & Exposition

Authors

Marigold F. Bays-Muchmore, University of Illinois, Urbana-Champaign; Alexandra Chronopoulou, University of Illinois, Urbana-Champaign

Tagged Topics

Diversity

Tagged Divisions

Student

that of thestudents’ perceptions of engineering in regard to their own engineering identity and abilities. In a study by M. Besterfield-Sacre in 1997, incoming engineering students were surveyed ontheir perceptions of engineering as a field, their own abilities as engineers, and their confidencein their success [1]. The performance and retention of the students were then tracked for thefollowing three years and related back to their initial attitudes. Students who left engineering ingood academic standing had significantly different attitudes about themselves and engineeringcompared to students who stayed in engineering, or who left in poor academic standing. Theinitial attitudes of students who left in good standing reflected significantly

Conference Session

Developing Teaching and Mentoring Skills

Collection

2018 ASEE Annual Conference & Exposition

Authors

Bret Austin Arnold, University of Tulsa; Alison J. Kerr, University of Tulsa; Bradley J. Brummel, University of Tulsa; Michael W. Keller, University of Tulsa

Tagged Divisions

Graduate Studies

. Unfortunately, manyaspects professionalism elude quantitative measurement—consider cooperation withmanagement or maintaining ethical standards. Consequently, objective measures can be quiterestricted in scope. In contrast, subjective ratings allow raters to consider a broad range ofreference points before making their assessment. This requires, however, a careful considerationto sources of rater error that contaminate subjective ratings. After considering both approaches,we determined subjective measures were most fitting and carefully considered the sources ofrater-error detailed below.Sources of Rater ErrorIf rater measurements were perfect, the scores provided by each rater would reflect only theratee’s degree of competence. In reality, ratings are

Conference Session

Motivation, Identity, and Belongingness

Collection

2018 ASEE Annual Conference & Exposition

Authors

Anita Patrick, University of Texas, Austin; Maura J. Borrego, University of Texas, Austin; Carolyn Conner Seepersad, University of Texas, Austin

Tagged Topics

Diversity

Tagged Divisions

Educational Research and Methods

toconduct tasks. Similarly, competence describes a student’s belief in their ability tounderstand content. Performance and competence are closely linked. In later quantitativestudies of identity, these factors were combined into one performance/competence factor,thus reflecting student’s self-perception of performance as linked to their actualperformance. Recognition describes how parents, relatives, friends, and instructors seethe student in a given context. This framework was expanded by Hazari, Sonnert, Sadler,and Shanahan (2010) in their quantitative analysis of physics identity with the addition ofinterest to the framework. Interest describes one’s enjoyment in learning or interest inlearning about engineering. The PCIR framework refers to the

Conference Session

The Evolving Classroom

Collection

2018 ASEE Annual Conference & Exposition

Authors

Charles Riley P.E., Oregon Institute of Technology; Sharon L. Beaudry, Oregon Institute of Technology; Aja Bettencourt-McCarthy, Oregon Institute of Technology

Tagged Divisions

Civil Engineering

/board notes, demonstrations and visual components of concepts, and group hands-onactivities. 0 2 4 6 8 10 12 14 Developing/Using Learning Objectives Board Work/Color/Lecture Notes Group/Hand-on Activities (connecting to Concepts) Illustration of Concepts/Demos/Visual Incorporating Music Ongoing Instructor Reflection/Self-Assessment Instructor Movement Learning Names/Building Rapport Provide More Feedback/Peer Review Dynamic Classroom Spaces

Conference Session

Topics in Computing and Information Technology-I

Collection

2018 ASEE Annual Conference & Exposition

Authors

Andrew R. Schmitt, Metropolitan State University; Theresa Chasar, Newell Brands; Mangaya Sivagnanam, Ingersoll Rand; Faisal Kaleem, Metropolitan State University

Tagged Divisions

Computing and Information Technology

accessed. Flood attacks happen when a system receives too much traffic forthe server to buffer, causing them to slow down to the point of stopping.Distributed denial of service (DDoS) attacks occur when multiple devices are leveraged into abotnet and used to target a single system. Flooding attack methods are used in DDoS strikes toincrease the volume of traffic aimed at the target. DDoS attacks can also be reflected andamplified to further increase the volume of traffic generated.Generally speaking, reflected DDoS attacks are any attack where the attacker spoofs the sourceIP address to be the address of the intended target and amplified attacks are any attack where theoriginal attack is enhanced by use of another protocol, redirection, or spoofed

Conference Session

Materials Division Technical Session 1

Collection

2018 ASEE Annual Conference & Exposition

Authors

Megan Frary, Boise State University

Tagged Divisions

Materials

ateither end. In addition to other outcomes, the mindset that a person has determines how theyinterpret mistakes they make; while someone with a fixed mindset thinks mistakes are failuresand result from their innate lack of ability, someone with a growth mindset views mistakes asopportunities to reflect and learn more.The two different mindsets grew out of the earlier work of Dweck et al. who considered howchildren deal with failure [2, 3]. They found that students who placed more emphasis on the roleof effort were more likely to persist during challenging tasks. As a result, Dweck and Legett [4]went on to describe two different forms of self-concept, one following an entity theory and thesecond following an incremental theory; these would later

Conference Session

Engineering Technology Division Poster Session

Collection

2017 ASEE Annual Conference & Exposition

Authors

Sheree Buikema, Purdue University; Robert J. Herrick, Purdue Polytechnic Institute; Wanju Huang, Purdue University

Tagged Divisions

Engineering Technology

Reviewer. Wanju enjoys collaborating with faculty to design online and blended courses. She strives to transfer faculty’s expertise and teaching philosophy in different learning contexts and enhance students’ learning experiences. She has published and presented research papers related to online learning and instructional design at national and international conferences. She holds a Ph.D. in Curriculum and Instruction with a concentration in Technology from the University of Illinois at Urbana-Champaign. c American Society for Engineering Education, 2017 Using Technology to Reinvent a Learning EnvironmentAbstract:This is a reflection describing the process of redesigning a lower

Conference Session

Faculty Development

Collection

2017 ASEE Annual Conference & Exposition

Authors

Mel Chua, Olin College of Engineering; Lynn Andrea Stein, Olin College of Engineering

Tagged Topics

Diversity

Tagged Divisions

Educational Research and Methods

apprenticeship framing presumethat expertise comes through scaffolded, reflective, and social performance leading towardcontextually adaptable mastery. These contrasting frames, supported by case studies, provide atheoretical basis for improved curricular culture change.Introduction: Pedagogical change is curricular culture changeEducational experiences are embedded in curricular cultures. By curricular cultures, we meanparticular sets of assumptions, practices, and skills regarding teaching and learning that areshared by a community, or, in more colloquial terms, “the way we do things around here” withrespect to the curriculum. An individual course typically includes a particular set of expectations,roles, activities, artifacts, and underlying

Conference Session

Engineering Management Division Technical Session 1: Programs, Pedagogies, and Practices

Collection

2017 ASEE Annual Conference & Exposition

Authors

Ekaterina Koromyslova, South Dakota State University; Teresa J.K. Hall, South Dakota State University; Byron G. Garry, South Dakota State University

Tagged Divisions

Engineering Management

currently professor and head of the Construction and Operations Management department at South Dakota State University.Prof. Byron G. Garry, South Dakota State University BYRON GARRY is Associate Professor and Undergraduate Program Coordinator in the Department of Construction & Operations Management in the Jerome J. Lohr College of Engineering at South Dakota State University. He has been a member of ASEE since 1998. As SDSU ASEE Campus Representative, his goal is to help fellow College of Engineering faculty to be reflective teachers. c American Society for Engineering Education, 2017 Continuous Improvement of Teaching via Peer and Administrator Classroom

Conference Session

Curricular Issues in Computing

Collection

2017 ASEE Annual Conference & Exposition

Authors

Sreyoshi Bhaduri, Virginia Tech; Tamoghna Roy, Virginia Tech

Tagged Divisions

Computing & Information Technology

byorganizations and often reflect the college’s unique vision which sets it apart from peerinstitutions. Analytical techniques which rely on word usage, semantic information, andmetadata information can be used to generate powerful descriptive models with allow us toobtain relevant information from text-based data. This study presents a Natural LanguageProcessing (NLP) based textual data analytical approach using Term Frequency-InverseDocument Frequency (tf-idf) to study the mission statements of engineering colleges/schools. Atotal of 59 engineering colleges/schools: 29 public, and 30 private, across the United States wereanalyzed in this study. Results of this study indicate that there is indeed a difference in tf-idfscores for public versus private