Longevity of Crown Margin Repairs Using Glass Ionomer: A Retrospective Study

Indiana University-Purdue University Indianapolis (IUPUI)Objectives: Repair of crown margins may extend the functional life of existing crowns. However, the longevity of such treatment is unknown. This study determined the survival time of crown margin repairs (CMR) with glass-ionomer (GI) and resin-modified glass-ionomer cements. Methods: We queried axiUm (Exan Group, Coquitlam, BC, Canada) database for permanent teeth that underwent CMR in the Graduate Operative Dentistry Clinic, Indiana University School of Dentistry (IUSD), Indianapolis, Ind., USA, from January 1, 2006 through January 1, 2018. Since there is no CDT code for the CMR procedure, CDT codes for resin-composite and GI restorations (D23XX) were queried; these patients also had treatment notes that indicated CMR. The final data set included patient ID, birth date, gender, dates of treatments, CDT codes, tooth type, tooth surface and existing findings. Two examiners developed guidelines for record review and manually reviewed the clinical notes of patient records to confirm CMR. Only records that were confirmed with the presence of CMR were retained in the final dataset for survival analysis. Survival time was calculated by Kaplan-Meier statistics and a Cox Proportional Hazards model was performed to assess the influence of selected variables (p < 0.05). Results: 214 teeth (115 patients) with CMR were evaluated. Patient average age was 69.4 11.7 years old. Posterior teeth accounted for 78.5 percent (n = 168) of teeth treated. CMRs using GI had a projected 5-year survival rate of 62.9 percent (K-M Analysis) and an 8.9 percent annual failure rate. Cox Proportional Hazards Regression analysis revealed that none of the factors examined (age, gender, tooth type) affected time to failure. Conclusion: CMRs may extend the longevity of crowns with defective margins. Larger EHR studies or case control studies are needed to investigate other variables, such as the caries risk status or the severity of defects that may affect the survival rate of CMRs

Harbormaster command and control (HCCC) shelter : finite element model and structural analysis.

The Harbormaster Command and Control Center (HCCC) project provides mobile platforms intended to control harbor operations. The main component of the HCCC is a double-expandable shelter mounted on a 5 ton military flatbed truck. Kentucky Trailer Corporation manufactured a baseline shelter using standard materials (aluminum, steel, plywood, etc.) and also considered alternate designs using composite materials (carbon fiber laminates, glass fiber laminates, composite sandwich configurations, etc.). Two faculty members and several graduate students in the Department of Mechanical Engineering at the University of Louisville participated in this effort, primarily in terms of material selection, structural analysis, and design approaches. This thesis presents one portion of that work. This consists of a finite element model (FEM) of the HCCC using standard materials. This model was constructed to match the design proposed and later built and delivered by Kentucky Trailer. The thesis also presents two structural analysis simulations performed using the HCCC FEM. The HCCC FEM was built using ANSY Mechanical APDL. This software utilizes text-based “input files” to build, analyze and post-process the HCCC FEM entirely without user assistance. The author generated these input files to create the HCCC FEM structure using 3D beam elements, layered shell elements, and point mass elements. This approach represented a simplification to eliminate the need for more computationally intensive 3D solid elements; it also provides a simpler approach for changing the model as design changes occur. For example, the thickness of an aluminum plate in the HCCC FEM model is represented as a number that can be easily changed; for a 3D solid element model, revisions would involve changing solid model entities such as volumes and areas followed by remeshing. This is feasible in a small model but impractical in a large complex model such as the HCCC FEM. The HCCC FEM is constructed in a modular manner, with different models representing the roof, sides, rear and front, floor and both expandable sections. These various submodels are joined together using constraint equations to cause identical displacements and rotations along common boundaries between models. This also permitted scenarios such as analysis with the expandables retracted or expanded. Contact elements are used to simulate support of the HCCC FEM along is bottom by a rigid boundary simulating the truck bed carrying the HCCC. The HCCC FEM is a nonlinear model due to both the contact elements and the ability to solve in cases of arbitrarily large displacement needed for dynamic analysis. Two analyses using the HCCC FEM are presented. The first is a static analysis under various constant inertial (acceleration) loads to demonstrate that the structure is worthy for air transport using a C-17 aircraft. The second is a dynamic analysis simulating the structural response during a rail impact; this occurs when the HCCC is mounted on a rail car which then collides with another rail car. Both analyses were beneficial in demonstrating that the HCCC design performs sufficiently well in service

Motivational, volitional and multiple goal predictors of walking in people with type 2 diabetes

Acknowledgment MN’s PhD scholarship was provided by Ministry of Health and Medical Education (Islamic Republic of Iran). This study was funded by the University of Aberdeen reference number: GP007RGC1618. FFS is funded by Fuse, the UK Clinical Research Collaboration Centre of Excellence for Translational Research in Public Health (grant number: MR/K02325X/1). The researchers gratefully acknowledge all the Type 2 diabetic patients and their household members who participated in the study for their contribution to this study; without them there would be no data. The researchers gratefully acknowledge the SDRN for providing the list of Type 2 diabetes and helping for sampling.Peer reviewedPublisher PD

Measuring Computer Forensics Skill

Computer forensic analysts combine their technical skills with their forensic aptitude to recover information from computers and storage devices. Most technology professionals demonstrate expertise through the acquisition of different professional certifications. Certifications, however, are not always a valid judge of skill, because certifications are formatted as written and applicable tests. It is common for people to forget knowledge and skills when they are not routinely practiced. The same applies with technology certifications. One must practice the skills learned for the certification test consistently in order to convert them to long-term memory. “Cognitive processes play a prominent role in the acquisition and retention of new behavior patterns” (Bandura 1977, p. 192). As a skill is practiced, it is better retained. Due to the current inability to accurately measure an individual’s skills and understanding of computer forensics principles, this research will investigate how to measure proficiency amongst professionals and novices. Recent research utilized conceptual expertise within the context of computer security (Giboney et al. 2016). This study utilized a technique to quickly measure the difference between novices and experts. Following their guidelines, we propose to do the same for computer forensics expertise with the following research question: What knowledge, skills and abilities are needed to be demonstrated in a measure to assess computer forensics expertise? Conceptual expertise is the understanding about the theoretical concepts and their relationship in a topic area. The SEAM process (Giboney et al. 2016) aims to gauge the practical application of situations to the goal wherein experts can show their conceptual expertise. The conceptual expertise task is based on the idea that those who have surface level knowledge will group scenarios by surface features while experts will be able to group the same scenarios by deep features (Giboney et al. 2016). The assessment has been designed to measure the understanding of basic computer forensics processes. It consists of twenty-five situations created to highlight different stages of the digital forensic process. These situations focus on a gender-neutral individual, Jordan and the tasks they perform given certain parameters. Survey takers will group the situations by stage of forensics or by what crime the task is involved with. We will show that the assessment can accurately determine an individual’s understanding of computer forensics. When this is shown, this assessment could be used in a variety of ways including initial assessments of job candidates and pre- and post- tests for computer forensic classes

Perovskite solar cells in N-I-P structure with four slot-die-coated layers

The fabrication of perovskite solar cells in an N-I-P structure with compact titanium dioxide blocking, mesoporous titanium dioxide scaffold, single-step perovskite and hole-transport layers deposited using the slot-die coating technique is reported. Devices on fluorine-doped tin oxide-coated glass substrates with evaporated gold top contacts and four slot-die-coated layers are demonstrated, and best cells reach stabilized power conversion efficiencies of 7%. This work demonstrates the suitability of slot-die coating for the production of layers within this perovskite solar cell stack and the potential to transfer to large area and roll-to-roll manufacturing processes

The visual appearance of beer : A review concerning visually-determined expectations and their consequences for perception

This review critically evaluates the literature concerning the impact of visual appearance cues (including colour, foam, and cloudiness) on people's perception in the beer category. The authors assess both the sensory expectations that are elicited by the visual appearance of beer, and the extent to which those expectations carry-over to influence the actual tasting experience. Beer is a particularly intriguing category to study since the differing production rules in different countries mean that there is not always the same scope to modify the colour in order to meet perceived consumer demands. What is more, there is currently disagreement in the literature concerning the impact of beer colour and foam on people's expectations of beer prior to tasting, and their multisensory flavour perception on tasting. Given how much beer is consumed annually, it is surprising that more research has not been published that assesses the undoubtedly important role of visual appearance in this beverage category. Part of the reason for this may simply be that it is difficult to create consistent experimental stimuli given the rapid transition of the head of the beer post-serving. © 2019 Elsevier Lt

Happy hour? A preliminary study of the effect of induced joviality and sadness on beer perception

Our emotions influence our perception. In order to determine whether emotion influences the perception of beer, 32 participants watched either a scene from the movie Wall-E to induce joviality, or a short clip from the Shawshank Redemption to induce sadness. The participants were then required to sample up to 250 mL of Yenda Pale Ale beer and rate it on a variety of taste and flavor characteristics (e.g., bitterness), before completing the Positive and Negative Affect Schedule-X (PANAS-X). The data were analyzed using Bayesian t-tests and Null Hypothesis Significance Tests (NHSTs). After applying conservative corrections for multiple comparisons, NHSTs failed to reach statistical significance. However, the effect sizes suggested that inducing joviality, relative to inducing sadness, resulted in the beer being rated as (a) tasting more pleasant, (b) tasting sweeter, and (c) being of higher quality. Following the induction of joviality, participants were also willing to pay more for the beer. The Bayesian analyses indicated that induced emotion can influence flavor perception for complex taste stimuli. The effect sizes and Bayesian analyses are interpreted in terms of Feelings-as-Information theory. These preliminary findings can tentatively be applied to real-world environments such as venues that serve and/or market alcohol. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.Funding: This research was funded by the Arts and Humanities Research Council (AHRC), grant number AH/L007053/1 awarded to C.S

A preliminary investigation of the effect of ethical labeling and moral self-image on the expected and perceived flavor and aroma of beer

Ethical labelling has been shown to influence taste/flavour perception. Across two experiments, the present study examined how ethical labelling and moral self-image influenced both the expected (Experiment One) and perceived (Experiment Two) taste/flavour characteristics of beer. In Experiment One, 170 participants read either a ‘moral’ or ‘control’ label describing a brewery, after which they were presented with an image of a beer. Participants then completed a Beer Taste Perception Questionnaire and the Moral Self-Image Scale. In Experiment Two, 59 participants were exposed to either the moral or control label before tasting a beer and completing the same questionnaires from Experiment One. The results of Experiment One indicated that label type moderated the relationship between moral self-image and the intensity ratings of the beer. Specifically, in the presence of a control label, the expected intensity of the beer’s flavour increased as moral self-image increased. Experiment Two found no evidence that the moral label influenced the perceived taste of the beer. However, the results showed that as moral self-image became more positive the perceived refreshingness of the beer increased. This study provides novel evidence of the potential relationship between an individual’s moral self-image and the expected and perceived taste/flavour characteristics of beer. © 2021 by the authors. Licensee MDPI, Basel, Switzerland

A Unified Account of the Moral Standing to Blame

Recently, philosophers have turned their attention to the question, not when a given agent is blameworthy for what she does, but when a further agent has the moral standing to blame her for what she does. Philosophers have proposed at least four conditions on having “moral standing”: 1. One’s blame would not be “hypocritical”. 2. One is not oneself “involved in” the target agent’s wrongdoing. 3. One must be warranted in believing that the target is indeed blameworthy for the wrongdoing. 4. The target’s wrongdoing must some of “one’s business”. These conditions are often proposed as both conditions on one and the same thing, and as marking fundamentally different ways of “losing standing.” Here I call these claims into question. First, I claim that conditions (3) and (4) are simply conditions on different things than are conditions (1) and (2). Second, I argue that condition (2) reduces to condition (1): when “involvement” removes someone’s standing to blame, it does so only by indicating something further about that agent, viz., that he or she lacks commitment to the values that condemn the wrongdoer’s action. The result: after we clarify the nature of the non-hypocrisy condition, we will have a unified account of moral standing to blame. Issues also discussed: whether standing can ever be regained, the relationship between standing and our "moral fragility", the difference between mere inconsistency and hypocrisy, and whether a condition of standing might be derived from deeper facts about the "equality of persons"

Summability of the perturbative expansion for a zero-dimensional disordered spin model

We show analytically that the perturbative expansion for the free energy of the zero dimensional (quenched) disordered Ising model is Borel-summable in a certain range of parameters, provided that the summation is carried out in two steps: first, in the strength of the original coupling of the Ising model and subsequently in the variance of the quenched disorder. This result is illustrated by some high-precision calculations of the free energy obtained by a straightforward numerical implementation of our sequential summation method.Comment: LaTeX, 12 pages and 4 figure