Three-dimensional stress analysis of the femur with prosthetic hip stem utilizing computed tomography scans of the femur for geometry and material properties

Three-dimensional finite element stress analyses of the femur with prosthesis hip stem were performed for two cases, one male and one female, using ideally bonded cemented titanium prostheses. Computed tomography data files were used to derive the three-dimensional femur geometry and material properties for each cortical bone element. The maximum shear stress (4.7 MPa) in the cement was greater then the maximum tensile stress and occurred at the cement-bone interface. The tensile stresses in the cement were less then the fatigue strength of the cement. The stress patterns were quite similar for the two cases. A data analysis program was developed to processes computed tomography data files of a proximal femur into a finite element model file with prosthesis. The program utilizes Microsoft Excel, it Visual Basic Modules, Math Soft Mathcad, dynamic data exchange, custom menus and user input boxes to make the user interface as efficient as possible

Does Gender Impact Business Students Perceptions Of Teaching Effectiveness?

While there are certainly differences ofopinion regarding teaching effectiveness, the goal of this study is toinvestigate whether there is consistency or differences in opinion based on thegender of the student doing the evaluation of the instructor or the gender ofthe instructor being evaluated. Thispaper summarizes the gender-based findings from a survey administered tostudents in fall 2011 at a mid-sized Association to Advance Collegiate Schoolsof Business International (AACSB International) accredited Midwesternuniversity business school. Thirty-fivetraits were presented for evaluation. Thefindings of this study suggest that there are differences between female andmale student ratings of teacher effectiveness.Females in general tend to rate teachers higher overall in terms ofteaching effectiveness. Furthermore,there are specific traits that appear to be more important to females, andother specific traits which appear to be more important to males. This study provides strong evidence thatthere are systematic differences between male and female students in terms of theirperceptions of the teaching traits they find important and how they rateinstructors of each gender. It isimportant that faculty members and especially administrators are aware of thepotential for gender bias in ratings of teacher effectiveness. Men and women have different perceptions. Male and female students are different, andthey perceive differences between male and female faculty members

Differing Federal Individual Income Tax Perceptions: Political Party Affiliation And Ideological Philosophy

Individuals who are affiliated with different political parties and who subscribe to different ideological philosophies also tend to have different views on many issues. This paper explores taxpayer perceptions of the federal individual income tax, which can be traced back to 1913 in its present form, based upon their political party affiliation as well as their ideological philosophy. The analysis revealed that the responses to the federal individual income tax statements included in this survey were not independent of political party or ideological philosophy. These results suggest that the political and ideological makeup of Congress and the President are likely to have an impact on future decisions with respect to possible modifications to the federal individual income tax. The question remains whether these differences may be set aside in a consolidated effort to find long range solutions to our country’s fiscal challenges

The Impact Of Instructor Attire On Student Perceptions Of Faculty Credibility And Their Own Resultant Behavior

Prior studies suggest that faculty members who are credible are more effective in the classroom in that they are evaluated more highly and their students achieve greater learning. This paper explores how the instructor’s attire impacts his or her perceived credibility, and how the students’ corresponding perception of instructor credibility impacts the students’ self-described behavior.  Questionnaires depicting instructors of both genders each wearing three different outfits, including casual, business casual and professional attire, are used to assess business student opinions regarding the academician’s credibility and the students’ resultant effort and learning.  The results indicate that faculty members can take comfort in that  their level of preparation, knowledge and ability to prepare students for a career do impact their credibility in the eyes of the students, no matter their choice of attire.  Instructor credibility, in turn, was found to have a significant positive relationship with all ten student effort and behavior variables that were examined.  In particular, credibility had the most impact on the student’s preparation for each class, attentiveness, appreciation for instructor effort, and respect for the instructor.  Positive significant relationships were also found between credibility and student evaluations of both the class and the instructor.&nbsp

The Impact Of Business Faculty Attire On Student Perceptions And Engagement

Certainly not a new phenomenon, professors continue to strive to discover the magic elixir that will cause all students to become active participants in the learning process. It seems logical that if students find a topic interesting or pertinent to their career objectives, they will tend to take a more active role in a course. Perhaps as reasonable to assume, if instructors are engaging and have the respect of the class, students will naturally put forth more effort to master the material.  Prior studies have also shown that certain pedagogical devices and innovations, such as the usage of presentation technology, can positively impact student motivation. This study explored whether something as basic as the professor’s attire could also have a motivating effect on student perceptions and behavior in a college classroom setting. This paper summarizes the results of a survey pertaining to faculty dress that was administered to students enrolled in selected business courses at a mid-sized Midwestern university. Students were asked their opinion of whether the professional or unprofessional dress of the instructor would conceivably impact their own learning and effort. The survey results show that, in general, students perceive professional dress positively, and adjust their behavior accordingly

Density, species, and size distribution of groupers (Serranidae) in three habitats at Elbow Reef, Florida Keys

We examined the density, size and species distribution of groupers in three habitats on an inshore-to-offshore transect across Elbow Reef, Florida Keys: high-relief spur-and-groove (4–9 m depth), relict spur-and-groove (10–20 m), and deep fore reef slope (21–30 m). Physical relief was greatest in the high-relief spur-and-groove (up to 3 m), lowest in the relict spur-and-groove habitat (30%). There were significant differences in the density, size, and species distribution of groupers among the three habitats. Graysby, Epinephelus cruentatus, was numerically dominant, constituting 82–91% of individual observed. Black grouper, Mycteroperca bonaci, and Nassau grouper, E. striatus, were more abundant in high to moderate relief habitats, whereas red hind, E. guttatus, was more abundant in the low-relief habitat. The size distribution was shifted towards smaller sizes in lowest relief habitat and towards larger sizes in areas with greater (\u3e0.5 m) vertical relief. We suggest that fishing pressure in the Florida Keys has resulted in an offshore grouper assemblage dominated by graysby, a small grouper species (length) which is not targeted by fishermen, and that habitat selection and biological interactions have significantly influenced the ecological structure of the grouper assemblage of this coral reef