A Comparative Study of the Ontogeny of Macrosclereids and Osteosclereids in the Integument of Cassia Fasciculata and Desmodium Canadense

Developmental patterns, developmental sequence, deposition of secondary wall material, and maturation of macrosclereids and osteosclereids were similar in Desmodium canadense and Cassia fasciculata. Both species apparently lack a well-defined strophiolar region. Two distinct differences were observed in the mature seed coat. One is the presence of a single row of macrosclereids in the hilar region of Cassia fasciculata and a double row of macrosclereids in the hilar region of Desmodium canadense. The second is the appearance of spicule-like structures, apparently enveloped laterally by a cellulosic matrix in the cuticularized layer of Cassia fasciculata

Profile Interview with Dr. Jill Newton

Dr. Jill Newton has been a professor in the Math Education Department of the College of Education since 2008. She started the Tanzania study abroad program in 2010, and has been taking education and non-education students since. The program goes for a month and the students get to teach in local schools and experience small town life in Tanzania. Students take classes to get towards their Global Studies minor, and get to live at Fish Eagle Point during their stay. The curriculum is focused on teaching across cultures and learning about the education system worldwide, but most importantly, students are given the opportunity to interact and learn from a culture other than their own. Students leave with more knowledge about service learning and being a good global citizen. They are given the tools to serve in their own communities, and have memories that will last them a lifetime. Dr. Newton\u27s program gives students the opportunity to grow and develop beyond the curriculum

Inflammatory cell-induced corrosion in total knee arthroplasty: a retrieval study

Metal release in patients with joint replacements is associated with local tissue reactions, pain, and ultimately revision of implants. One of the causes of this metal loss is speculated to be due to a mechanism of inflammatory cell-induced corrosion (ICIC). In this knee retrieval study, we aimed to: (1) identify the extent and location of ICI corrosion patterns on our femoral and tibial components and (2) correlate our findings with implant and clinical information. We investigated 28 femoral and 9 tibial components made of polished CoCr for presence of ICIC, using macroscopic and microscopic screening and statistical analyses to identify any significant correlations between our results and clinical information. We found that 71% of femoral and 100% of tibial components showed evidence of ICIC and significantly more was present on non-contacting regions (p < 0.0001). We found a significant correlation between the presence of ICIC and instability (p = 0.0113) and a significant difference between poster stabilized and cruciate retaining designs in the amount of ICIC on internal edges (p = 0.0375). This corrosion pattern was prevalent in our series of knee retrievals and may help explain some of the mechanisms of material loss that may occur in vivo

Det norske småskalafiskeriet og databidrag til FAO-Duke-WorldFish prosjekt

publishedVersio

Project-Based Learning in Introductory Statistics: Comparing Course Experiences and Predicting Positive Outcomes for Students from Diverse Educational Settings

In order to evaluate the acceptability and potential impact of the Passion-Driven Statistics curriculum, this article describes background characteristics, and course experiences and outcomes of students enrolled in the multidisciplinary, introductory, project-based course in liberal arts colleges, large state universities, regional college/universities, and community colleges. We found that the course could be successfully delivered across these diverse educational settings. After controlling for educational setting and pre-survey responses to individual outcome measures, consistent predictors of positive course outcomes included student’s initial interest in conducting research, their higher likelihood of enrolling in a statistics course if it were not required, finding the project-based course less challenging, and finding the research project more rewarding than other students. Regional college/university, and community college students reported working significantly harder in the course and finding the course more challenging than students taking the course at liberal arts colleges or state universities. Students from liberal arts colleges generally reported more positive course experiences than students from other educational settings. However, when compared to students from both liberal arts colleges and large state universities, those from regional colleges/universities reported being more likely to have learned more in the project-based course than in other college courses they had taken. Taken together, the project-based course was successfully delivered across diverse post-secondary educational settings and provides a promising model for getting students hooked on the power and excitement of applied statistics

Columbus State University Honors College: Senior Theses, Fall 2020/Spring 2021

This is a collection of senior theses written by honors students at Columbus State University during the Fall 2020 and Spring 2021 semesters.https://csuepress.columbusstate.edu/honors_theses/1002/thumbnail.jp

Tribology of Medical Devices

Importance of tribology in a number of medical devices and surgical instruments is reviewed, including artificial joints, artificial teeth, dental implants and orthodontic appliances, cardiovascular devices, contact lenses, artificial limbs and surgical instruments. The current focus and future developments of these medical devices are highlighted from a tribological point of view, together with the underlying mechanisms

Diagnostic guidelines for the histological particle algorithm in the periprosthetic neo-synovial tissue

Background The identification of implant wear particles and non-implant related particles and the characterization of the inflammatory responses in the periprosthetic neo-synovial membrane, bone, and the synovial-like interface membrane (SLIM) play an important role for the evaluation of clinical outcome, correlation with radiological and implant retrieval studies, and understanding of the biological pathways contributing to implant failures in joint arthroplasty. The purpose of this study is to present a comprehensive histological particle algorithm (HPA) as a practical guide to particle identification at routine light microscopy examination. Methods The cases used for particle analysis were selected retrospectively from the archives of two institutions and were representative of the implant wear and non-implant related particle spectrum. All particle categories were described according to their size, shape, colour and properties observed at light microscopy, under polarized light, and after histochemical stains when necessary. A unified range of particle size, defined as a measure of length only, is proposed for the wear particles with five classes for polyethylene (PE) particles and four classes for conventional and corrosion metallic particles and ceramic particles. Results All implant wear and non-implant related particles were described and illustrated in detail by category. A particle scoring system for the periprosthetic tissue/SLIM is proposed as follows: 1) Wear particle identification at light microscopy with a two-step analysis at low (× 25, × 40, and × 100) and high magnification (× 200 and × 400); 2) Identification of the predominant wear particle type with size determination; 3) The presence of non-implant related endogenous and/or foreign particles. A guide for a comprehensive pathology report is also provided with sections for macroscopic and microscopic description, and diagnosis. Conclusions The HPA should be considered a standard for the histological analysis of periprosthetic neo-synovial membrane, bone, and SLIM. It provides a basic, standardized tool for the identification of implant wear and non-implant related particles at routine light microscopy examination and aims at reducing intra-observer and inter-observer variability to provide a common platform for multicentric implant retrieval/radiological/histological studies and valuable data for the risk assessment of implant performance for regional and national implant registries and government agencies