A Sequential Inspection Procedure for Fault Detection in Multistage Manufacturing Processes

Fault diagnosis in multistage manufacturing processes (MMPs) is a challenging task where most of the research presented in the literature considers a predefined inspection scheme to identify the sources of variation and make the process diagnosable. In this paper, a sequential inspection procedure to detect the process fault based on a sequential testing algorithm and a minimum monitoring system is proposed. After the monitoring system detects that the process is out of statistical control, the features to be inspected (end of line or in process measurements) are defined sequentially according to the expected information gain of each potential inspection measurement. A case study is analyzed to prove the benefits of this approach with respect to a predefined inspection scheme and a randomized sequential inspection considering both the use and non-use of fault probabilities from historical maintenance data.

MIDS Level 1: Specification, conformance checklist, mapping template and instructions for use

Approved formally as a TDWG Task Group (TG) in September 2020, TG MIDS is working to harmonise a framework for "Minimum Information about a Digital Specimen (MIDS)". MIDS clarifies what is meant by different levels of digitization (MIDS levels) and specifies the minimum information to be captured at each level. Capturing and presenting data in future digitization in standard formats is essential so that data can be more easily understood, compared, analysed and communicated via the Internet. Adopting MIDS and working to achieve specific MIDS levels in digitization ensures that enough data are captured, curated and published such that they are useful for the widest possible range of future research, teaching and learning purposes. Adopting MIDS makes it easier to consistently measure the extent of digitization achieved over time and to set priorities for the remaining work. In the year since MIDS was first introduced at TDWG 2020, the TG has focussed on the details of MIDS level 1, representing the basic minimum level of information to be expected and captured in basic digitization activities such as creating a catalogue record and (optionally) making photographic or other digital images of specimens. To help the community adopt and embed MIDS conformance as a core part of digitization and data publishing/management pipelines, the MIDS specification consists of definitions of the expected information elements, a template for mapping terms/fields in institutional collection management systems and other data management schemas to those information elements, a conformance proforma allowing declaration of how a digitization or data publishing event conforms to MIDs, and instructions for use.

Exploration and Coordination of Complementary Multirobot Teams in a Hunter-and-Gatherer Scenario

The hunter-and-gatherer approach copes with the problem of dynamic multirobot task allocation, where tasks are unknowingly distributed over an environment. This approach employs two complementary teams of agents: one agile in exploring (hunters) and another dexterous in completing (gatherers) the tasks. Although this approach has been studied from the task planning point of view in our previous works, the multirobot exploration and coordination aspects of the problem remain uninvestigated. This paper proposes a multirobot exploration algorithm for hunters based on innovative notions of “expected information gain” to minimize the collective cost of task accomplishments in a distributed manner. Besides, we present a coordination solution between hunters and gatherers by integrating the novel notion of profit margins into the concept of expected information gain. Statistical analysis of extensive simulation results confirms the efficacy of the proposed algorithms compared in different environments with varying levels of obstacle complexities. We also demonstrate that the lack of effective coordination between hunters and gatherers significantly distorts the total effectiveness of the planning, especially in environments containing dense obstacles and confined corridors. Finally, it is statistically proven that the overall workload is distributed equally for each type of agent which ensures that the proposed solution is not biased to a particular agent and all agents behave analogously under similar characteristics.

Facilities of Badminton Field in West Sumatera

This study aims to reveal the suitability of badminton field facilities in West Sumatera based on badminton regulatory indicators. The criteria used are the criteria issued by the Badminton game rules of the World Federation. The method in this research uses quantitative methods with a descriptive approach. Data were collected by conducting direct observations in the field and interviews with field owners. The results of the research were that 78% of the field meets the criteria related to the width of the field line, 81% was related to the height of the pole, 73% was related to the depth of the net, 78% was related to the width of the net, 71% was related to the net height in the middle of the field, 79% was related to the net height at double pile area, 34% related to no gap between the netting and the netting posts, 90% to the length of the court, 86% was related to the width of the doubles court, 77% to the width of the single court, 75% to the net distance to the short service line, 79% to the long service area of ​​the singles. Information from interviews found that carpet-based fields met the requirements of the field because they were installed directly by the consultant, while fields with other materials only expected information from the internet and did not get clear source information.

Public availability of information from WFME-recognized accreditation agencies

The World Federation for Medical Education (WFME) Recognition Programme was created to ensure the comparability of medical school accrediting agencies, so that the schools accredited by those agencies would have similar educational quality. WFME explicitly values transparency and has recognition criteria that relate to agencies making information publicly available. Our study examined 20 WFME-recognized agencies’ transparency by reviewing agency websites for 27 information elements related to accreditation standards, procedures, and processes. We contacted agencies as needed for information that we could not find on their websites. We were only able to retrieve additional information from 3 of the 12 agencies that we attempted to contact. We found that while 12 agencies had over 90% of expected information elements available, 6 agencies had less than 50%. Our findings illustrate barriers for those who wish to better understand medical school accreditation in some regions and raise questions about how comparable WFME-recognized agencies are.

A Complete Method for Assessing the Effectiveness of Eyewitness Identification Procedures: Expected Information Gain

We present a method for measuring the efficacy of eyewitness identification procedures by applying fundamental principles of information theory. The resulting measure evaluates the Expected Information Gain (EIG) for an identification attempt, a single value that summarizes an identification procedure’s overall potential for reducing uncertainty about guilt or innocence across all possible witness responses. In a series of demonstrations, we show that EIG often disagrees with existing measures (e.g., diagnosticity ratios or area under the ROC) about the relative effectiveness of different identification procedures. Each demonstration is designed to highlight key distinctions between existing measures and EIG. An overarching theme is that EIG provides a complete measure of evidentiary value, in the sense that it factors in all aspects of identification performance. Collectively, these demonstrations show that EIG has substantial potential to inspire new discoveries in eyewitness research and provide a new perspective on policy recommendations for the use of identifications in real investigations.

Optimal Sensor Placement for Reliable Virtual Sensing Using Modal Expansion and Information Theory

A framework for optimal sensor placement (OSP) for virtual sensing using the modal expansion technique and taking into account uncertainties is presented based on information and utility theory. The framework is developed to handle virtual sensing under output-only vibration measurements. The OSP maximizes a utility function that quantifies the expected information gained from the data for reducing the uncertainty of quantities of interest (QoI) predicted at the virtual sensing locations. The utility function is extended to make the OSP design robust to uncertainties in structural model and modeling error parameters, resulting in a multidimensional integral of the expected information gain over all possible values of the uncertain parameters and weighted by their assigned probability distributions. Approximate methods are used to compute the multidimensional integral and solve the optimization problem that arises. The Gaussian nature of the response QoI is exploited to derive useful and informative analytical expressions for the utility function. A thorough study of the effect of model, prediction and measurement errors and their uncertainties, as well as the prior uncertainties in the modal coordinates on the selection of the optimal sensor configuration is presented, highlighting the importance of accounting for robustness to errors and other uncertainties.

In Pursuit of Knowledge: Preschoolers Expect Agents to Weigh Information Gain and Information Cost When Deciding Whether to Explore

When deciding whether to explore, agents must consider both their need for information and its cost. Do children recognize that exploration reflects a trade-off between action costs and expected information gain, inferring epistemic states accordingly? In two experiments, 4- and 5-year-olds (N=144; of diverse race and ethnicity) judge that an agent who refuses to obtain low-cost information must have already known it, and an agent who incurs a greater cost to gain information must have a greater epistemic desire. Two control studies suggest that these findings cannot be explained by low-level associations between competence and knowledge. Our results suggest that preschoolers’ Theory of Mind includes expectations about how costs interact with epistemic desires and states to produce exploratory action.