Acceptable values of collapse margin ratio with different confidence levels

The mean seismic probability risk model has widely been used in seismic design and safety evaluation of critical infrastructures. In this paper, the confidence levels analysis and error equations derivation of the mean seismic probability risk model are conducted. It has been found that the confidence levels and error values of the mean seismic probability risk model are changed for different sites and that the confidence levels are low and the error values are large for most sites. Meanwhile, the confidence levels of ASCE/SEI 43-05 design parameters are analyzed and the error equation of achieved performance probabilities based on ASCE/SEI 43-05 is also obtained. It is found that the confidence levels for design results obtained using ASCE/SEI 43-05 criteria are not high, which are less than 95%, while the high confidence level of the uniform risk could not be achieved using ASCE/SEI 43-05 criteria and the error values between risk model with target confidence level and mean risk model using ASCE/SEI 43-05 criteria are large for some sites. It is suggested that the seismic risk model considering high confidence levels instead of the mean seismic probability risk model should be used in the future.

This paper considers two competing supply chains that face cost uncertainty, each consisting of one supplier and one retailer. To address the uncertain cost information, we propose a decision rule based on confidence levels to measure the goals of the supply chain participants. We provide the new concept of the belief‐degree cost of a supply chain that embodies the decision maker's ability to comprehensively address information uncertainty and control the risk caused by information uncertainty. We find that regardless of which of the three games it is in – integrated, hybrid, or decentralized – a chain should order more and thereby gain more profit when its cost uncertainty increases or the competing chain's cost uncertainty decreases. The chain with a low or sufficiently low belief‐degree cost gains a competitive advantage on both quantity and profit. A chain's competitiveness can be enhanced by either decreasing its confidence level or increasing its rival's confidence level. Furthermore, we demonstrate that supply chain integration is the dominant strategy for given confidence levels. Nevertheless, a prisoner's dilemma occurs when the differences in the belief‐degree costs of the two supply chains are not significant and the competitive intensity is high. In addition, the magnitudes of the confidence levels can be changed to avoid or cause a prisoner's dilemma. Finally, under different confidence levels, the Stackelberg model for competing hybrid or decentralized supply chains is extended to the bargaining model, and the impact of bargaining power on supply chain competition is analyzed.

To investigate the association between confidence level in venepuncture and knowledge in determining causes of blood sample haemolysis among clinical staff and phlebotomists. Various collection methods are used to perform venepuncture, also called phlebotomy, the act of drawing blood from a patient using a needle. The collection method used has an impact on preanalytical blood sample haemolysis. Haemolysis is the breakdown of red blood cells, which makes the sample unsuitable. Despite available evidence on the common causes, extensive literature search showed a lack of published evidence on the association of haemolysis with staff confidence and knowledge. A quantitative primary research design using survey method. A purposive sample of 290 clinical staff and phlebotomists conducting venepuncture in one North England hospital participated in this quantitative survey. A three-section web-based questionnaire comprising demographic profile, confidence and competence levels, and knowledge sections was used to collect data in 2012. The chi-squared test for independence was used to compare the distribution of responses for categorical data. anova was used to determine mean difference in the knowledge scores of staff with different confidence levels. Almost 25% clinical staff and phlebotomists participated in the survey. There was an increase in confidence at the last venepuncture among staff of all categories. While doctors' scores were higher compared with healthcare assistants', p ≤ 0·001, nurses' were of wide range and lowest. There was no statistically significant difference (at the 5% level) in the total knowledge scores and confidence level at the last venepuncture F(2,4·690) = 1·67, p = 0·31 among staff of all categories. Evidence-based measures are required to boost staff knowledge base of preanalytical blood sample haemolysis for standardised and quality service. Monitoring and evaluation of the training, conducting and monitoring haemolysis rate are equally crucial. Although the hospital is succeeding in providing regular training in venepuncture, this is only one aspect of quality. The process and outcome also need interventions.

Physicians have an important role in encouraging patients to increase their physical activity to reduce their risk of developing heart disease and other diseases. Early education about the “Exercise is Medicine” (EIM) initiative would provide long-term benefits throughout physicians’ careers. PURPOSE: To evaluate the impact of the EIM initiative education from the American College of Sports Medicine on residents’ confidence level and likelihood to prescribe exercise to patients. METHODS: An EIM educational session about the importance of exercise in patient care was conducted to teach residents in emergency medicine, family medicine, internal medicine, psychiatry, and transitional year programs. A cross-sectional study evaluated improvement in residents’ confidence level and likelihood to prescribe exercise to patients. The changes from baseline to post-education were analyzed using Wilcoxon’s signed rank test. RESULTS: A total of 55 residents participated in the study. Thirteen (24%) are emergency medicine, 11 (20%) are family medicine, 21 (38%) are internal medicine, 2 (4%) are psychiatry, and 8 (15%) are transitional year residents. Forty-four residents (80%) were not familiar with the EIM initiative. The residents across all programs reported that the EIM education significantly improved their confidence to prescribe exercise (p = 0.0002). There was a significant increase in the likelihood of prescribing exercise (p < 0.0001). Internal medicine residents reported significantly improved confidence levels (p = 0.0339) and likelihood to prescribe exercise (p = 0.0023). After learning about EIM, 45 residents (85%) reported to be more likely to participate in moderate to vigorous activity. All residents agreed that exercise physiology and assessment should be taught in medical school. CONCLUSION: Educating the residents on the EIM initiatives significantly enhances their confidence level and increases their likelihood of prescribing exercise as medicine to their patients.

Purpose: Reporting confidence after a decision-making task is widely used in the studies of metacognition. A cognitive factor is usually defined as “thinking about thinking.” When people predict others’ behavior in risky situations, they consider various factors affecting others’ choices; at that point, they can determine how confident they are about their predictions about the others' decision. Materials and Methods: This study investigates human neural activities in different confidence levels when participants predict others’ financial choices in a risky decision-making task. For this aim, functional Magnetic Resonance Imaging (fMRI) combined with behavioral tasks is used to demonstrate the neural representation of human confidence level about others’ possible choices. We scanned 21 healthy and normal participants in two separate sessions each containing three runs. Results: The results indicate that the Frontal Pole Cortex (FPC), cingulate gyrus, and precuneus cortex activities are correlated with the confidence of people in their predictions (P &lt; 0.0005; cluster size, k &gt; 75). Using behavioral data, we found that when participants answer correctly, their confidence level as a metacognition factor increases simultaneously and vice versa. Conclusion: These key findings suggest that the brain's activities can represent subjects’ confidence level in predicting risky behaviors and show how metacognition in the theory of mind for prediction of others’ choices is represented in the brain’s activity.

Quarantine measures including treatments are applied to exported fruit and vegetable commodities to control regulatory fruit fly pests and to reduce the likelihood of their introduction into new areas. Nonhost status can be an effective measure used to achieve quarantine security. As with quarantine treatments, nonhost status can stand alone as a measure if there is high efficacy and statistical confidence. The numbers of insects or fruit tested during investigation of nonhost status will determine the level of statistical confidence. If the level of confidence of nonhost status is not high, then additional measures may be required to achieve quarantine security as part of a systems approach. Certain countries require that either 99.99 or 99.9968% mortality, as a measure of efficacy, at the 95% confidence level, be achieved by a quarantine treatment to meet quarantine security. This article outlines how the level of confidence in nonhost status can be quantified so that its equivalency to traditional quarantine treatments may be demonstrated. Incorporating sample size and confidence levels into host status testing protocols along with efficacy will lead to greater consistency by regulatory decision-makers in interpreting results and, therefore, to more technically sound decisions on host status.

General Chemistry is a foundational subject that most STEM students are required to take at some point in their academic careers. However, many learners struggle with mastery and confidence in Chemistry due to its abstract nature and mathematical requirements. This study aimed to determine the mastery level and confidence level of Grade 11 STEM learners in General Chemistry competencies as a basis for strategic intervention. Utilizing a descriptive-correlational research design, the study examined the relationship between learners’ mastery and confidence levels and identified least mastered competencies. Data were collected through standardized achievement tests and confidence level surveys to Seventy-Six (76) Grade 11 STEM learners purposively sampled from a selected public senior high school in the Philippines. Results revealed a lack of mastery based on their test score. The competencies under the following topics: calculating empirical and molecular formulas, molecular geometry, gases, writing and balancing chemical equations, and stoichiometry were identified as “Least Mastered”. These topics were noted as a challenge because they often require mathematical reasoning and conceptual clarity due to the abstract nature of representing molecules’ valence electrons. However, learners revealed a “High Confidence” in their confidence level. The analysis using the Spearman correlation test revealed a p= 0.1274, indicating no significant relationship between mastery and confidence level. The results suggest that learners’ mastery was low, yet their level of confidence was high. Hence, it can be said that students’ academic mastery cannot be only attributed to their confidence because other aspects influence students’ mastery in chemistry. According to the findings, students’ levels of confidence may not significantly affect their performance in chemistry if other important aspects of studying the subject are neglected.

In this study, we compare students’ performance in solving mathematics and physics exercises with their confidence level in answering them. Accurate self-assessment of confidence is known to positively correlate with academic achievement, yet confidence is often neglected when designing teaching interventions. The research presented here aimed at investigating the relationship between students’ confidence levels and test scores and its evolution over a short lesson cycle. We also examine the presence of gender-based differences. The study was first conducted with a pilot group of 43 secondary school students and later expanded to 260 students. A modified version of the Test of Calculus and Vectors in Mathematics and Physics was used, incorporating confidence assessment for each item. Results suggest that, while test scores and confidence levels improved overall following the lesson cycle, this did not translate into a better “calibration” of the students (i.e., the alignment between confidence level and actual performance). Specifically, male students became more overconfident, whereas female students became more underconfident. These findings support taking into account confidence when designing teaching interventions and using confidence assessment practices to train students’ self-assessment skills.

a basic understanding of acid-base physiology is critical for the correct assessment of arterial blood gases in the clinical setting ([1][1]). In this context, collaborative teaching strategies in the undergraduate classroom setting may be useful, since it has been reported to enhance both transfer

Problem. Not all individuals who enter a biofeedback program obtain the relief that they are seeking from their various pain-related or anxiety-related complaints. Some individuals obtain little or no relief, whereas others may eliminate their pain-related or anxiety-related complaints completely. Understanding more clearly the reasons for such variance is considered important in that such understanding may encourage the development of techniques that elicit greater biofeedback efficacy rates. This research study was an attempt to determine some of the factors that may help contribute to a successful biofeedback program. Specifically examined were interactional effects between levels of biofeedback confidence and measures of assertiveness on biofeedback treatment outcome. Method. The population included 40 patients who were referred to the biofeedback program at a military hospital in south-central Missouri. These were subjects who presented with either an anxiety-related or pain-related complaint. Subjects were administered the Gambrill Assertion Inventory, the Biofeedback Intervention Confidence Scale, and the Biofeedback Survey (pre-test/post-test). The pre-test, along with the first two instruments, were administered before treatment intervention and the post-test was administered after a standardized biofeedback treatment intervention ensued. A two-way ANCOVA design, using a fixed effects model, was utilized in the analysis of the resulting data. Results. No interactional effects between measures of assertiveness and biofeedback confidence on biofeedback treatment outcome were found. In addition, assertiveness levels did not appear to have a significant impact on biofeedback treatment outcome in terms of frequency or intensity of the presenting complaint. The only significant finding of the study, at the .05 level, was than an individual's confidence level in a biofeedback treatment program did have a significant impact upon treatment outcome in terms of "frequency" of presenting complaint. That is, a high level of biofeedback confidence had a significant impact on reducing the frequency of a presenting complaint. Conclusion. It was concluded that if a high level of confidence in a biofeedback program can have a positive and significant impact on biofeedback outcome in terms of "frequency" of presenting complaint, then increasing an individual's level of confidence in such an intervention would be viewed as cost-effective in terms of treatment.

Collapse safety reserve of jacket offshore platforms subjected to rare intense earthquakes

Background Mpox remains a critical public health challenge in Central Africa, where endemic circulation of the virulent Clade I virus persists through zoonotic and human-to-human transmission. This systematic review and meta-analysis synthesize 40 years of evidence (1984-2024) to characterize Mpox epidemiology, vaccination gaps and clinical pattern in the Central African Republic (CAR), informing targeted control strategies for this re-emerging threat. Methods Following PRISMA guidelines, we conducted a comprehensive search of PubMed, ScienceDirect, Cochrane Library, and Scopus for studies reporting laboratory-confirmed Mpox cases in CAR. Pooled estimates were calculated using random/fixed-effects models with R Statistics version 4.4.2 with subgroup analysis conducted for period, region, participants and disease burden. Heterogeneity (I 2) and publication bias (funnel plots, Egger’s and Begg’s tests) were rigorously assessed. The confidence intervals (CIs) were estimated at 95% level of confidence. Results Among 15 included studies representing 1984-2024 surveillance data, the pooled severity rate was 60.9% (95%CI:47.5-72.8) - highest in Health Region 6 (77.3%, 95%CI: 55.6-90.2). The Case fatality rate (CFR) among confirmed cases was 10.9% (95% CI: 5.9-19.0). There was non-significant decrease in CFR from 11.5%; (95% CI: 6.1-20.7) before 2022 to 7.14% (95% CI: 0.7-1.9) from 2022 on. There was a persistent post-2022 CFR elevations in high-burden areas (13.5% for &gt;10 cases). Higher mortality was observed in Eastern Health Regions (11.11%; 95% CI: 5.08-22.60) compared to Western Health Regions with no reported death. Among suspected cases, the CFR was 10.7% (95%CI: 6.6-17.0). Vaccination uptake was low (20.0%, 95%CI: 10.3-35.2). The clinical profile included fever (91.1%, 42.9-99.3), rash (85.5%, 95%CI: 75.7-91.8), lymphadenopathy (57.0%, 95%CI: 34.3-77.1). Severe manifestations like hemorrhagic lesions (22.2%) and mucosal involvement (oral:59.2%; genital:57.4%) were also reported. Conclusion The CAR faces a disproportionate Mpox burden characterized by high severity, elevated mortality, and suboptimal vaccine coverage, particularly in eastern regions. These findings suggest the urgent need for: (1) enhanced surveillance systems with genomic sequencing capacity; (2) prevention of disease lethality through early case detection and appropriate care provision; (3) strengthening vaccine distribution prioritizing high-risk populations; and (4) context-specific interventions, including community education and healthcare worker training, to curb future outbreaks.

FRI0296 Level of confidence in the diagnosis of spondyloarthritis by expert readers in sacroiliac joint MRI: a new gold standard criterion for defining a positive MRI?

Examining a huge amount of data is a typical issue in any research process. However, different statistical processes and techniques play essential role to derive a meaningful conclusion from the presented enormous data. Control of type I error is highly essential for a researcher or statistician while dealing with comparisons test with more than two variables. Multiple testing statistical tests provides a structural system and minimizes the error rate by helping to derive meaningful accurate conclusions. Among the different multiple test procedures Tukey's honestly significant difference test (Tukey's HSD) is most common and popular techniques. The main objective of this study was to explore how significantly selection of confidence level or error rate can affect the rate of committing type I error while drawing conclusion. The effect of committing type I error with selection of confidence level or error rate was explored with citing suitable case study in a special education setting. The case study focuses cognitive effect of music on growth and enhancement of the motor behavior (running, jumping and sliding) of children with mild intellectual disability enrolled in the special school setting. ANOVA test was performed and the significance of selection of individual confidence level and simultaneous confidence level) in Tukey’s HSD test was described.

This paper aims to provide insights into human perception, navigation performance, and confidence in helicopter overland navigation. Helicopter overland navigation is a challenging mission area because it is a complex cognitive task, and failing to recognize when the aircraft is off-course can lead to operational failures and mishaps. A human-in-the-loop experiment to investigate pilot perception during simulated overland navigation by analyzing actual navigation trajectory, pilots' perceived location, and corresponding confidence levels was designed. There were 15 military officers with prior overland navigation experience who completed 4 simulated low-level navigation routes, 2 of which entailed auto-navigation. This route was paused roughly every 30 s for the subject to mark their perceived location on the map and their confidence level using a customized program. Analysis shows that there is no correlation between perceived and actual location of the aircraft, nor between confidence level and actual location. There is, however, some evidence that there is a correlation (rho = -0.60 to approximately 0.65) between perceived location and intended route of flight, suggesting that there is a bias toward believing one is on the intended flight route. If aviation personnel can proactively identify the circumstances in which usual misperceptions occur in navigation, they may reduce mission failure and accident rate. Fleet squadrons and instructional commands can benefit from this study to improve operations that require low-level flight while also improving crew resource management.