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A Pilot Study: Comparing The Use Of Computer-Based Instruction Materials And Audio-Tape Materials In Practicing Chinese, Ka-Fai Shiu, Sharon E. Smaldino Jan 1993

A Pilot Study: Comparing The Use Of Computer-Based Instruction Materials And Audio-Tape Materials In Practicing Chinese, Ka-Fai Shiu, Sharon E. Smaldino

Faculty Publications

Computer-based and audio tape materials were compared for their effectiveness in helping students practice Chinese language lessons. Subjects were enrolled in an intensive elementary course in Mandarin Chinese. The textbook and audio tape were prepared by the Beijing Language Institute in China; and the computer-based material was developed by the author using HyperCard based on the textbook. Written and spoken components were tested; using tests developed by the instructor; a native of China. The instructional materials were used alternately in the 16-week course at the University of Northern Iowa (Cedar Falls). Students performed better in the weeks the computer-based materials …

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Honoring Diversity In Teacher Education: Infusing Learning Styles; Cooperative Learning And Multicultural Nonsexist Education Into The Student Teaching Semester, Janey L. Montgomery, Joyce Simpson, Judy Lindholm Jan 1993

Honoring Diversity In Teacher Education: Infusing Learning Styles; Cooperative Learning And Multicultural Nonsexist Education Into The Student Teaching Semester, Janey L. Montgomery, Joyce Simpson, Judy Lindholm

Faculty Publications

This paper demonstrates how teacher educators can empower preservice teachers to develop a rationale for honoring diversity in their classrooms by building upon an awareness of learning style preference; cooperative learning; and multicultural nonsexist education. A human relations course at the University of Northern Iowa that is taught concurrently with the student teaching experience demonstrates how student teachers become involved in collaborative relationships with their peers by sharing weekly seminars; planning presentations; doing action research; and engaging in classroom instruction. The model involves personalization of concepts through experiential learning in which group building and team teaching are key strategies. Learning …

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Structural Evidence For Nonplanar Keto- And Planar Enol-Forms Of Oxophlorins, Mathias O. Senge, Kevin M. Smith Dec 1992

Structural Evidence For Nonplanar Keto- And Planar Enol-Forms Of Oxophlorins, Mathias O. Senge, Kevin M. Smith

Faculty Publications

The first structural investigation of a zinc(II) and a free-base oxophlorin reveals considerable conformational differences between the keto- (1) and enol-form (2) of oxophlorins.

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Conventionalism And Contractarianism, Noel B. Reynolds Nov 1992

Conventionalism And Contractarianism, Noel B. Reynolds

Faculty Publications

In this paper Noel B. Reynolds’s theory of law as convention is compared to the public choice contractarian theory of James M. Buchanan. While there are numerous similarities, major differences emerge. Only conventionalism can produce legal and political authority and norms to guide the use of that authority in maintaining the rule of law. The concept of constructive unanimity is introduced to overcome the ultimate failure of contractarianism to legitimate the authority of law.

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Tutte Polynomials Computable In Polynomial Time, J. G. Oxley, D. J.A. Welsh Nov 1992

Tutte Polynomials Computable In Polynomial Time, J. G. Oxley, D. J.A. Welsh

Faculty Publications

We show that for any accessible class of matroids of bounded width, the Tutte polynomial is computable in polynomial time. © 1992.

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Labeling Graphs With A Condition At Distance 2, Jerrold R. Griggs, Roger K. Yeh Nov 1992

Labeling Graphs With A Condition At Distance 2, Jerrold R. Griggs, Roger K. Yeh

Faculty Publications

No abstract provided.

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Unobserved Ability, Efficiency Wages, And Interindustry Wage Differentials, Mckinley L. Blackburn, David Neumark Nov 1992

Unobserved Ability, Efficiency Wages, And Interindustry Wage Differentials, Mckinley L. Blackburn, David Neumark

Faculty Publications

One competitive-market explanation of interindustry wage differentials that is not challenged by the persistence of these differentials is that they are due to differences across workers in unobserved ability or quality. In contrast, this paper explores the unobserved ability hypothesis by using test scores as error-ridden indicators of ability, and family background variables as instruments.This approach avoids two potential problems with using first-difference methods to remove omitted-ability bias from wage equation estimates of industry effects the exacerbation of measurement error from misclassification of industry, and selectivity with respect to industry changes. However, this approach may introduce other problems, for two …

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Dna Diversity Among Clinical Isolates Of Helicobacter Pylori Detected By Pcr-Based Rapd Fingerprinting, Natalia Akopyanz, Nickolai O. Bukanov, T. Ulf Westblom, Stephen Kresovich, Douglas E. Berg Oct 1992

Dna Diversity Among Clinical Isolates Of Helicobacter Pylori Detected By Pcr-Based Rapd Fingerprinting, Natalia Akopyanz, Nickolai O. Bukanov, T. Ulf Westblom, Stephen Kresovich, Douglas E. Berg

Faculty Publications

The RAPD (or AP-PCR) DNA fingerprinting method was used to distinguish among clinical isolates of Helicobacter pylori, a bacterium whose long term carriage is associated with gastritis, peptic ulcers and gastric carcinomas. This method uses arbitrarily chosen oligonucleotides to prime DNA sythesis from genomic sites to which they are fortuitously matched, or almost matched. Most 10-nt primers with > 60% G + C yielded strain-specific arrays of up to 15 prominent fragments, as did most longer ( > 17-nt) primers, whereas most 10-nt primers with 50% G +C did not. Each of 64 independent H.pylori isolates, 60 of which were from …

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Adaptive Boundary Detection Using “Live-Wire” Two-Dimensional Dynamic Programming, William A. Barrett, Bryan S. Morse, Eric N. Mortensen, Jayaram Udupa Oct 1992

Adaptive Boundary Detection Using “Live-Wire” Two-Dimensional Dynamic Programming, William A. Barrett, Bryan S. Morse, Eric N. Mortensen, Jayaram Udupa

Faculty Publications

An adaptive boundary detection algorithm that uses two-dimensional dynamic programming is presented. The algorithm is less constrained than previous one-dimensional dynamic programming algorithms and allows the user to interactively determine the mathematically optimal boundary between a user-selected seed point and any other dynamically selected "free” point in the image. Interactive movement of the free point by the cursor causes the boundary to behave like a “live wire” as it adapts to the new minimum cost path between the seed point and the currently selected free point. The algorithm can also be adapted or customized to learn boundary-defining features for a …

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Equitable Estoppel Against The Government - The Missouri Experience: Time To Rethink The Concept, Kenneth D. Dean Oct 1992

Equitable Estoppel Against The Government - The Missouri Experience: Time To Rethink The Concept, Kenneth D. Dean

Faculty Publications

The purpose of this article is to examine the Missouri cases to determine if there are patterns which provide guidance in understanding what constitutes “exceptional” circumstances or “manifest injustice,” to determine if there is a coherent theory underlying the application of the *68 doctrine, and, finally, to propose modifications to the traditional approach.

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A Symbolic Balanced Budget Amendment, Neal Devins Oct 1992

A Symbolic Balanced Budget Amendment, Neal Devins

Faculty Publications

No abstract provided.

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Species Of The Cretaceous Tree Fern Tempskya From Utah, William D. Tidwell, Naomi Hebbert Sep 1992

Species Of The Cretaceous Tree Fern Tempskya From Utah, William D. Tidwell, Naomi Hebbert

Faculty Publications

Nine species of the permineralized stems of Tempskya were investigated from the Lower Cretaceous Cedar Mountain and Burro Canyon Formations, and the lower Upper Cretaceous Dakota Formation in central and southeastern Utah. Tempskya jonesii, T. stichkae, and T. readii are new and are differentiated on the basis of the radial orientation of their dorsiventral stems, their internodal lengths, the lack of sclerenchyma in the inner cortex of T. jonesii, the three nearly continuous zones of sclerenchyma in the inner cortex off T. stichkae, and the completely sclerotic inner cortex of T. readii. Specimens of T. jonesii and T. minor were …

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Nuclear Dna Content Variation Within The Rosaceae, E. E. Dickson, K. Arumuganathan, Stephen Kresovich, J. J. Doyle Sep 1992

Nuclear Dna Content Variation Within The Rosaceae, E. E. Dickson, K. Arumuganathan, Stephen Kresovich, J. J. Doyle

Faculty Publications

Nuclear DNA content has been estimated using flow cytometry for 17 species and eight cultivars of Malus and for 44 species of 29 other genera within the Rosaceae. Compared to other angiosperms, diploid genome sizes vary little within the family Rosaceae and within the genus Malus. C-values of genera within the subfamilies Spiraeoideae and Rosoideae are among the smallest of flowering plants thus far reported. In general, the Maloideae have the largest diploid genomes of the family, consistent with their higher chromosome numbers and presumed polyploid origin.

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The Upc And The New Durable Powers, David M. English Jul 1992

The Upc And The New Durable Powers, David M. English

Faculty Publications

This article thoroughly explores the escalation of interest in durable powers of attorney, with particular emphasis on health care powers and advance directives. The author focuses on durable power legislation influenced by the Unifomi Probate Code and health care power and advance directive statutes enacted in response to recent decisions dealing with the withholding or withdrawal of life-sustaining treatment.

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Banking And Insurance - Should Ever The Twain Meet?, Emeric Fischer Jul 1992

Banking And Insurance - Should Ever The Twain Meet?, Emeric Fischer

Faculty Publications

No abstract provided.

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Multiplication, Division, And Shift Instructions In Parallel Random Access Machines, Jerry L. Trahan, Michael C. Loui, Vijaya Ramachandran Jun 1992

Multiplication, Division, And Shift Instructions In Parallel Random Access Machines, Jerry L. Trahan, Michael C. Loui, Vijaya Ramachandran

Faculty Publications

We prove that polynomial time on a parallel random access machine (PRAM) with unit-cost multiplication and division or on a PRAM with unit-cost shifts is equivalent to polynomial space on a Turing machine (PSPACE). This extends the result that polynomial time on a basic PRAM is equivalent to PSPACE to hold when the PRAM is allowed multiplication or division or unrestricted shifts. It also extends to the PRAM the results that polynomial time on a random access machine (RAM) with multiplication is equivalent to PSPACE and that polynomial time on a RAM with shifts (that is, a vector machine) is …

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Sound Symbolic Involvement, Janis B. Nuckolls Jun 1992

Sound Symbolic Involvement, Janis B. Nuckolls

Faculty Publications

This article examines an iconic form of communication, sound symbolism, which has been associated with oral cultures and implicated in paradigms of primitive mentality, I argue that Lowland Ecuadorean Quechua speakers use sound symbolic iconicity to create interlocutionary involvement. A speaker's performative foregrounding of a sound symbolic form simuhtes the salient qualities of an action, event, or process, and thereby invites a listener to project into an experience. This projected involvement, in turn, points the listener to deeper kinds of imaginative, intellectual, and emotional engagement with the narrative. The argument is based on an analysis of the formal and semantic …

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Liberal Visions Of The Freedom Of The Press, Michael J. Gerhardt May 1992

Liberal Visions Of The Freedom Of The Press, Michael J. Gerhardt

Faculty Publications

No abstract provided.

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Effects Of Fall Fertilizer Applications Of Mitotic Index And Bud Dormancy Of Loblolly Pine Seedlings, Hans Michael Williams, David B. South Apr 1992

Effects Of Fall Fertilizer Applications Of Mitotic Index And Bud Dormancy Of Loblolly Pine Seedlings, Hans Michael Williams, David B. South

Faculty Publications

A series of studies examined the effects of fall fertilization with diammoniwn phosphate (DAP) on mitotic index and bud donnancy [as measured by mean days to budbreak (DBB)] of two half-sib seed sources of loblolly pine. The first study tested different rates of DAP (0, 67, and 202 kg Nlha), the second study compared DAP with ammoniwnnitrate, and the third study examined the effect of different application dates (September 28, October 19, and November 9). An increase in mitotic index of unfertilized seedlings was observed during October and was due to developmental activity which follows initial budset. Differences in mitotic …

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The Public Performance Right In Libraries: Is There Anything Fair About It?, James S. Heller Apr 1992

The Public Performance Right In Libraries: Is There Anything Fair About It?, James S. Heller

Faculty Publications

Two sections of the Copyright Act of 1976 permit public performances in libraries under certain circumstances. Professor Heller explains the public performance right in the context of both owners and users of copyrighted works, and proposes a fair use standard that could provide much needed guidance on the use of copyrighted videocassettes in libraries.

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Moral Rules And Exceptions, Miroslav Kis Apr 1992

Moral Rules And Exceptions, Miroslav Kis

Faculty Publications

No abstract provided.

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Theologia Crucis And The Forensically Fraught World: Engaging Helmut Peukert And Jürgen Habermas, Gary M. Simpson Jan 1992

Theologia Crucis And The Forensically Fraught World: Engaging Helmut Peukert And Jürgen Habermas, Gary M. Simpson

Faculty Publications

No abstract provided.

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Economics Of Direct Seeding And Planting For Establishing Oak Stands On Old-Field Sites In The South., Steven H. Bullard, John D. Hodges, Robert L. Johnson, Thomas J. Straka Jan 1992

Economics Of Direct Seeding And Planting For Establishing Oak Stands On Old-Field Sites In The South., Steven H. Bullard, John D. Hodges, Robert L. Johnson, Thomas J. Straka

Faculty Publications

On old-field sites in the South, oak stand may be established by direct seeding of acorns, or by planting seed- lings. Planting seedlings costs approximately 21/2 times the cost of direct seeding on a per acre basis, and based on our study of overall costs and returns, we conclude that in most cases the additional costs of planting are not justified by the additional benefits. Direct seeding is therefore an eco- nomically viable alternative to planting, although success with seeding requires careful selection of species/site combinations and proper seed handling and storage

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Stable Isotope Analysis Using Tunable Diode Laser Spectroscopy, Todd B. Sauke, J. F. Becker, M. Loewenstein Jan 1992

Stable Isotope Analysis Using Tunable Diode Laser Spectroscopy, Todd B. Sauke, J. F. Becker, M. Loewenstein

Faculty Publications

Measurements of ratios of stable isotopes are used in such diverse fields as petroleum prospecting, medical diagnostics, and planetary exploration. The narrow emission linewidth available from tunable diode lasers permits high-resolution infrared absorption measurements of closely spaced isotopic rovibrational lines. Our dual beam spectrometer uses the sweep integration technique in a spectral region where adjacent spectral lines are of approximately equal absorbance at the expected isotopic abundances. The experimental results reported here indicate that isotopic ratios of carbon in carbon dioxide can be measured to an accuracy of better than 0.4%. This laser spectroscopic spectrometric technique offers an alternative to …

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Unequal Error Protection Qpsk Modulation Codes, Robert H. Morelos-Zaragoza, Shu Lin Jan 1992

Unequal Error Protection Qpsk Modulation Codes, Robert H. Morelos-Zaragoza, Shu Lin

Faculty Publications

The authors use binary linear UEP (LUEP) codes, in combination with a QPSK signal set and Gray mapping, to obtain new efficient block QPSK modulation codes with unequal minimum squared Euclidean distances. They give several examples of codes that have the same minimum squared Euclidean distance as the best QPSK modulation codes of the same rate and length. A new suboptimal two-stage soft-decision decoding is applied to LUEP QPSK modulation codes.

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Relationship Between Anxiety, Self-Confidence, And Evaluation Of Coaching Behaviors, Laura J. Kenow, Jean M. Williams Jan 1992

Relationship Between Anxiety, Self-Confidence, And Evaluation Of Coaching Behaviors, Laura J. Kenow, Jean M. Williams

Faculty Publications

Two experiments examined Smoll and Smith's (1989) model of leadership behaviors in sport. The coaching behaviors of a male head coach of a collegiate women's basketball team (n=11 players) were examined. The data supported competitive trait anxiety as an individual-difference variable that mediates athletes' perception and evaluation of coaching behaviors. There also was support for adding athletes' state cognitive anxiety, state self-confidence and perception of the coach's cognitive anxiety to the model as individual-difference variables. Athletes who scored high in trait anxiety (p<.001) and state cognitive anxiety (p<.05) and low in state self-confidence (p<.05), and athletes who perceived the coach as high in state cognitive anxiety (p<.001), evaluated coaching behavior more negatively. Game outcome may influence the effect of self-confidence in mediating athletes' perception and evaluation of coaching behaviors. Additionally, athletes perceived several specific coaching behaviors more negatively than did the coach, and athletes drastically overestimated their coach's self-reported pregame cognitive and somatic anxiety and underestimated his self-confidence. Overall, the results suggest that coaches should be more supportive and less negative with high anxious and low self-confident athletes.

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Glottal Airflow And Electroglottographic Measures Of Vocal Function At Multiple Intensities, Christopher Dromey, Elaine T. Stathopouloss, Christine M. Sapienza Jan 1992

Glottal Airflow And Electroglottographic Measures Of Vocal Function At Multiple Intensities, Christopher Dromey, Elaine T. Stathopouloss, Christine M. Sapienza

Faculty Publications

Summary: Ten normal female subjects produced syllables at 5 dB increments from soft to loud. The differentiated electroglottogram (dEGG) open and speed quotients were compared to similar quotients from the inverse-filtered airflow waveform. The latter were measured according to objective and subjective criteria. The data indicate that the open quotient from the airflow waveform decreased as the intensity increased. The dEGG open quotient did not demonstrate this trend. The speed quotient from airflow increased initially with vocal intensity and decreased again as the intensity ceiling was approached. The ratio of closing to opening slopes calculated from peaks in the dEGG …

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Lawyers And Loyalty, Michael K. Mcchrystal Jan 1992

Lawyers And Loyalty, Michael K. Mcchrystal

Faculty Publications

No abstract provided.

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Beyond Guardianship Reform: A Reevaluation Of Autonomy And Beneficence For A System Of Principled Decision-Making In Long Term Care, Alison Patrucco Barnes Jan 1992

Beyond Guardianship Reform: A Reevaluation Of Autonomy And Beneficence For A System Of Principled Decision-Making In Long Term Care, Alison Patrucco Barnes

Faculty Publications

No abstract provided.

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Suspicionless Drug Testing After Skinner And Von Raab: Constitutional Adjudication In The Courts Of Appeals, Phoebe Weaver Williams Jan 1992

Suspicionless Drug Testing After Skinner And Von Raab: Constitutional Adjudication In The Courts Of Appeals, Phoebe Weaver Williams

Faculty Publications

No abstract provided.

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