A Systematic Review of the 2016 National Academy of Engineering Exemplary Ethics Programs: Revisions to a Coding Framework.

Engineering ethics is a required aspect of accredited ABET programs, but there is widespread variation in how ethics is taught, to what ends, and how those ends are assessed. This variation makes it challenging to identify practices for teaching ethics to engineers aligned with extant practices in the field. In this study, we revise a recent coding framework by reviewing exemplary engineering ethics programs recognized by the National Academy of Engineering in 2016, or what we refer to as "exemplars." We pursue two primary objectives: (1) To apply and revise a prior coding framework to codify ethics learning objectives, instructional strategies, and assessment strategies in engineering education; and (2) To use the revised coding framework to identify trends in learning objectives, instructional strategies, and assessment strategies of NAE exemplars. We employ systemic review procedures to update the coding framework using 24 of 25 exemplars as a data source. The updated framework includes four primary categories associated with learning objectives, instructional strategies, assessment data collection strategies, and assessment design characteristics. Results indicate that ethical sensitivity or awareness was present in every exemplar as a learning objective, often alongside ethical reasoning-based learning objectives and the formation of professional skills. Exemplars employed numerous instructional strategies in tandem, as we coded eight out of 18 instructional strategies among at least half of the exemplars. Assignments/homework and summative reflections were the most oft-used sources of assessment data. Due to our challenges in coding assessment approaches, we offer practical suggestions for assessing engineering ethics instruction which are based on many of our coding discussions. We hope that this coding framework, the results classifying exemplary features of the NAE programs, and our practical suggestions can guide future instructors as they design, classify, assess, and report their approaches to engineering ethics education.

Incidence of Ultrathin Descemet Stripping Endothelial Keratoplasty Corneal Graft Rejection following Steroid Discontinuation.

Purpose/Aims: To determine the incidence of corneal graft rejection in patients with approximately 1 year of steroid therapy following uDSEK. A shortened course of corticosteroids may be beneficial and a viable option in Ultrathin Descemet's Stripping Endothelial Keratoplasty (uDSEK).Materials and Methods: This retrospective cohort study evaluated corneal graft rejection rate in 170 cases of uDSEK that met inclusion criteria with approximately 1 year of steroid therapy. Corneal graft rejection was defined by anterior chamber cell/flare, keratic precipitates with/without corneal edema, and/or a rejection line. The following were collected retrospectively from January 1, 2005 through January 1, 2013: gender, age, race, indication for uDSEK, length of follow-up, length of steroid therapy. Continuous data were compared using Wilcoxon Rank Sum Test and categorical data were compared using Fisher's Exact Test.Results: The included eyes had an average length of steroid therapy of 431 days (range 85-720 days) with an average follow-up of 1274 days (range 395-3186 days). During the follow-up period without steroid, 5 of the 170 eyes were diagnosed with rejection (2.94%). Of the five eyes that experienced rejection, four eyes resolved after topical prednisone was reinstituted alone and did not require repeat uDSEK. The other eye was lost to follow-up. The cumulative probability of rejection after steroid cessation was calculated at 0.67% after 12 months, 2.20% after 18 months, 3.08% after 24 months, and 4.55% after 36 months.Conclusion: Discontinuation of topical steroid at approximately 1 year after uDSEK results in a low rate of corneal graft rejection and may prove extended use unnecessary.

Rate of pseudophakic cystoid macular edema using intraoperative and topical nonsteroidal antiinflammatory drugs alone without steroids.

PURPOSE: To determine the rate of postoperative cystoid macular edema (CME) in patients undergoing cataract surgery treated with intraoperative intracameral and postoperative topical nonsteroidal antiinflammatory drugs (NSAIDs) without steroids. SETTING: Academic outpatient surgery center Wake Forest Baptist Health in Bermuda Run, NC. DESIGN: Retrospective cohort study. METHODS: A retrospective chart review was performed. Patients were identified through a medical record search tool using criteria of the Current Procedural Terminology code (66984), a single surgeon, and a date range from January 1, 2016, through December 31, 2017. Medical records were reviewed to determine intraoperative and postoperative medication regimen, visual outcome, and development of postoperative CME. Patients with a history of uveitis, diabetic macular edema, retinal vein occlusions, epiretinal membranes, vitreomacular traction, or any prior macular edema were excluded. In addition, any patients with less than 6 weeks of postoperative follow-up were excluded. RESULTS: Overall, 824 patient records were reviewed, and the analysis included 504 eyes. Of these, 2 eyes developed postoperative CME (rate = 0.40%, 95% CI 0.0005 to 0.0143). CONCLUSIONS: The rate of CME in patients treated with intraoperative and postoperative NSAIDs without steroids was low and below the historical rates derived from a literature review of CME development with the use of steroids.

Operationalizing Ethical Becoming as a Theoretical Framework for Teaching Engineering Design Ethics.

Ethical becoming represents a novel framework for teaching engineering ethics. This framework insists on the complementarity of pragmatism, care, and virtue. The dispositional nature of the self is a central concern, as are relational considerations. However, unlike previous conceptual work, this paper introduces additional lenses for exploring ethical relationality by focusing on indebtedness, harmony, potency, and reflective thought. This paper first reviews relevant contributions in the engineering ethics literature. Then, the relational process ontology of Alfred North Whitehead is described and identified as the foundation of the ethical becoming concept. Following this, ethical becoming is imagined as comprising five components: relationality and indebtedness, harmony and potency (i.e., beauty), care, freedom and reflective thought, and ethical inquiry. Each component will be unpacked and knit together to argue that (1) becoming in all its forms is relational and, therefore, whatever becomes is indebted to all to which it relates; (2) one's ethical engagement must be directed toward the creation of harmony and potency; (3) care practices are necessary to ensure that multiplicity is valued and safeguarded in the meeting of needs; (4) the capacity for reflective thought is necessary to fashion one's self and others in the direction of harmony, potency, and care; and (5) ethical thought and action must operate through a cycle of ethical inquiry. This paper will close with a brief exploration of how ethical becoming could be utilized in engineering education contexts.

A Systematic Literature Review of US Engineering Ethics Interventions.

Promoting the ethical formation of engineering students through the cultivation of their discipline-specific knowledge, sensitivity, imagination, and reasoning skills has become a goal for many engineering education programs throughout the United States. However, there is neither a consensus throughout the engineering education community regarding which strategies are most effective towards which ends, nor which ends are most important. This study provides an overview of engineering ethics interventions within the U.S. through the systematic analysis of articles that featured ethical interventions in engineering, published in select peer-reviewed journals, and published between 2000 and 2015. As a core criterion, each journal article reviewed must have provided an overview of the course as well as how the authors evaluated course-learning goals. In sum, 26 articles were analyzed with a coding scheme that included 56 binary items. The results indicate that the most common methods for integrating ethics into engineering involved exposing students to codes/standards, utilizing case studies, and discussion activities. Nearly half of the articles had students engage with ethical heuristics or philosophical ethics. Following the presentation of the results, this study describes in detail four articles to highlight less common but intriguing pedagogical methods and evaluation techniques. The findings indicate that there is limited empirical work on ethics education within engineering across the United States. Furthermore, due to the large variation in goals, approaches, and evaluation methods described across interventions, this study does not detail "best" practices for integrating ethics into engineering. The science and engineering education community should continue exploring the relative merits of different approaches to ethics education in engineering.

Customized recommendations for production management clusters of North American automatic milking systems.

Automatic milking systems (AMS) are implemented in a variety of situations and environments. Consequently, there is a need to characterize individual farming practices and regional challenges to streamline management advice and objectives for producers. Benchmarking is often used in the dairy industry to compare farms by computing percentile ranks of the production values of groups of farms. Grouping for conventional benchmarking is commonly limited to the use of a few factors such as farms' geographic region or breed of cattle. We hypothesized that herds' production data and management information could be clustered in a meaningful way using cluster analysis and that this clustering approach would yield better peer groups of farms than benchmarking methods based on criteria such as country, region, breed, or breed and region. By applying mixed latent-class model-based cluster analysis to 529 North American AMS dairy farms with respect to 18 significant risk factors, 6 clusters were identified. Each cluster (i.e., peer group) represented unique management styles, challenges, and production patterns. When compared with peer groups based on criteria similar to the conventional benchmarking standards, the 6 clusters better predicted milk produced (kilograms) per robot per day. Each cluster represented a unique management and production pattern that requires specialized advice. For example, cluster 1 farms were those that recently installed AMS robots, whereas cluster 3 farms (the most northern farms) fed high amounts of concentrates through the robot to compensate for low-energy feed in the bunk. In addition to general recommendations for farms within a cluster, individual farms can generate their own specific goals by comparing themselves to farms within their cluster. This is very comparable to benchmarking but adds the specific characteristics of the peer group, resulting in better farm management advice. The improvement that cluster analysis allows for is characterized by the multivariable approach and the fact that comparisons between production units can be accomplished within a cluster and between clusters as a choice.

Factors associated with increased milk production for automatic milking systems.

Automatic milking systems (AMS) are increasingly popular throughout the world. Our objective was to analyze 635 North American dairy farms with AMS for (risk) factors associated with increased milk production per cow per day and milk production per robot per day. We used multivariable generalized mixed linear regressions, which identified several significant risk factors and interactions of risk factors associated with milk production. Free traffic was associated with increased production per cow and per robot per day compared with forced systems, and the presence of a single robot per pen was associated with decreased production per robot per day compared with pens using 2 robots. Retrofitted farms had significantly less production in the first 4 yr since installation compared with production after 4 yr of installation. In contrast, newly built farms did not see a significant change in production over time since installation. Overall, retrofitted farms did not produce significantly more or less milk than newly constructed farms. Detailed knowledge of factors associated with increased production of AMS will help guide future recommendations to producers looking to transition to an AMS and maximize their production.

Phylogenetic evidence for two new insect-associated Chlamydia of the family Simkaniaceae.

On the basis of 16S-23S ribosomal DNA analyses, the whitefly Bemisia tabaci (Sternorrhyncha, Aleyrodidae) and the eriococcid Eriococcus spurius (Sternorrhyncha, Eriococcidae) were each found to harbor novel related chlamydial species within the family Simkaniaceae. The generic designation Fritscheagen. nov. is proposed to accommodate the two species, F. bemisiaesp. nov. and F. eriococci sp. nov. The finding of chlamydial 16S-23S ribosomal DNA in B. tabaci is consistent with a previous electron microscopy study which found that bacteriocytes of this species contain structures that we consider to resemble the elementary and reticulate bodies of chlamydia (Costa HS, Westcot DM, Ullman DE, Rosell R, Brown JK, Johnson MW. Protoplasma 189:194-202, 1995). The cloning and sequencing of a 16.6 kilobase DNA fragment from F. bemisiae indicated that it contains six genes encoding for proteins similar to those found in other species of chlamydia. These results extend the range of organisms that harbor chlamydia.

The genetic properties of the primary endosymbionts of mealybugs differ from those of other endosymbionts of plant sap-sucking insects.

Mealybugs (Hemiptera, Coccoidea, Pseudococcidae), like aphids and psyllids, are plant sap-sucking insects that have an obligate association with prokaryotic endosymbionts that are acquired through vertical, maternal transmission. We sequenced two fragments of the genome of Tremblaya princeps, the endosymbiont of mealybugs, which is a member of the beta subdivision of the Proteobacteria. Each of the fragments (35 and 30 kb) contains a copy of 16S-23S-5S rRNA genes. A total of 37 open reading frames were detected, which corresponded to putative rRNA proteins, chaperones, and enzymes of branched-chain amino acid biosynthesis, DNA replication, protein translation, and RNA synthesis. The genome of T. princeps has a number of properties that distinguish it from the genomes of Buchnera aphidicola and Carsonella ruddii, the endosymbionts of aphids and psyllids, respectively. Among these properties are a high G+C content (57.1 mol%), the same G+C content in intergenic spaces and structural genes, and similar G+C contents of the genes encoding highly and poorly conserved proteins. The high G+C content has a substantial effect on protein composition; about one-third of the residues consist of four amino acids with high-G+C-content codons. Sequence analysis of DNA fragments containing the rRNA operon and adjacent regions from endosymbionts of several mealybug species suggested that there was a single duplication of the rRNA operon and the adjacent genes in an ancestor of the present T. princeps. Subsequently, in one mealybug lineage rpS15, one of the duplicated genes, was retained, while in another lineage it decayed. These results extend the diversity of the types of endosymbiotic associations found in plant sap-sucking insects.