The purpose of this research is to test the systematic variation in the perception of travel time among travelers and relate the variation to the underlying street network structure. Travel survey data from the Twin Cities metropolitan area (which includes the cities of Minneapolis and St. Paul) is used for the analysis. Travelers are classified into two groups based on the ratio of perceived a...

This research investigated whether the differences found between novices and experts in using surface and deep structures to categorize problems applied to the domain of statistics. Also explored was whether the methodology of a triad judgment task was reliable in discriminating how beginning and advanced students represent statistics problems. The task was designed in which source problems sha...

The uncertain and complex lineage of the Lumbee American Indian tribe has made the issue of identity of prime concern. The cultural identification, racial identification, bicultural competence, and perceived school environment for 103 Lumbee Indian high school students were examined in this study. Higher self-ratings on American Indian cultural competence and American Indian cultural identifica...

At constant average speed (v), a balance between thrust force (Ft) and drag force (Fd) should occur: Ft-Fd = 0; hence the power generated by thrust forces (Pt = Ft·v) should be equal to the power needed to overcome drag forces at that speed (Pd = Fd·v); the aim of this study was to measure Pt (tethered swims), to estimate Pd in active conditions (at sprint speed) and to compare these values. 10...

Several sigmoidal functions (logistic, Gompertz, Richards, Schnute, and Stannard) were compared to describe a bacterial growth curve. They were compared statistically by using the model of Schnute, which is a comprehensive model, encompassing all other models. The t test and the F test were used. With the t test, confidence intervals for parameters can be calculated and can be used to distingui...

Students' perceptions of teaching quality are vital for quality assurance purposes. An increasingly used, department-independent instrument is the (Cleveland) clinical teaching effectiveness instrument (CTEI). Although the CTEI was developed carefully and its validity and reliability confirmed, we noted an opportunity for improvement given an intermingling in its rating scales: the labels of th...

In this paper, we present a dataow based approa h to testing aspe ts. Our approa h onsiders three levels of testing for aspe ts, i.e., intra-module testing, inter-module testing, and intra-aspe t testing. For an individual module (i.e., a pie e of advi e, an introdu tion, or a method), or a publi module along with other modules it alls in an aspe t, we perform intra-module testing or inter-modu...

The aim of this study was to evaluate whether patients with hyposalivation present damaged mastication or mandibular movements during speech. Forty subjects composed 2 groups: control and hyposalivation. Masticatory performance was assessed with a silicon-based artificial material and a 10-sieve method. Mandibular movements during speech were observed with a 3D jaw-tracking device. Data were an...

Two Cobas-Bio analyzers were found to have significantly increased imprecision, owing to absorbance errors, when we used rotors pieced together from segments of four to 10 cuvets. The difference in CV between whole/unbroken and four-cuvet or 10-cuvet segment rotors was significant by Student's unpaired t-test (P = 0.038 and less than 0.0001, respectively) and by the Mann-Whitney U test (P less ...

BACKGROUND This study examined the hospital-wide effect of a mandatory 8-hour preceptor workshop on preceptors and orientees. METHODS A mixed-methods approach (QUAN + qual) with a quasi-experimental design was used to test nurse preceptors' self-reported confidence and comfort (pre- to postworkshop) in five specific roles in addition to the frequency of coaching critical thinking and providin...