On-orbit assembly using superquadric potential fields

The autonomous on-orbit assembly of a large space structure is presented using a method based on superquadric artificial potential fields. The final configuration of the elements which form the structure is represented as the minimum of some attractive potential field. Each element of the structure is then considered as presenting an obstacle to the others using a superquadric potential field attached to the body axes of the element. A controller is developed which ensures that the global potential field decreases monotonically during the assembly process. An error quaternion representation is used to define both the attractive and superquadric obstacle potentials allowing the final configuration of the elements to be defined through both relative position and orientation. Through the use of superquadric potentials, a wide range of geometric objects can be represented using a common formalism, while collision avoidance can make use of both translational and rotation maneuvers to reduce total maneuver cost for the assembly process

Climate Informatics: Accelerating Discovering in Climate Science with Machine Learning

The goal of climate informatics, an emerging discipline, is to inspire collaboration between climate scientists and data scientists, in order to develop tools to analyze complex and ever-growing amounts of observed and simulated climate data, and thereby bridge the gap between data and understanding. Here, recent climate informatics work is presented, along with details of some of the field's remaining challenges. Given the impact of climate change, understanding the climate system is an international priority. The goal of climate informatics is to inspire collaboration between climate scientists and data scientists, in order to develop tools to analyze complex and ever-growing amounts of observed and simulated climate data, and thereby bridge the gap between data and understanding. Here, recent climate informatics work is presented, along with details of some of the remaining challenges

The Attorney-Client Privilege and the Work-Product Doctrine in Michigan

In Upjohn Co v. United States, the United States Supreme Court acknowledged that the attorney-client privilege - the oldest of the privileges for confidential communications known to the common law - has the crucial purpose of encourag[ing] full and frank communication between attorneys and their clients and thereby promote[s] broader public interests in the observance of law and administration of justice. Similarly, in Hickman v Taylor, the Court stressed the importance of the work-product doctrine, noting that [n]ot even the most liberal of discovery theories can justify unwarranted inquiries into the files and the mental impressions of an attorney. It is beyond question that, at a theoretical level, the attorney-client privilege and the work-product doctrine serve significant interests and that, at a practical level, attorneys constantly encounter issues involving these principles. Nevertheless, many attorneys do not acquire their familiarity with these crucial principles in any systematic way. Law school courses and casebooks often treat these principles superficially, and busy practicing lawyers tend to research specific issues only as they arise in the course of their work. As a result, many attorneys (and perhaps some judges) may not clearly understand the significance, scope, and limits of these doctrines. This publication is an attempt to solve this problem by offering a systematic and thorough examination of the attorney-client privilege and the work-product doctrine under Michigan law. Part II of this text addresses the attorney-client privilege; Part III addresses the work-product doctrine; and Part IV addresses ethics concepts of confidences and secrets. Wherever possible, Michigan authority has been cited and quoted. In some instances, federal cases are instructive in interpreting Michigan law or in filling an apparent gap in Michigan law; under those circumstances, the text freely cites and quotes from federal authority. The goal is to provide a comprehensive examination of these principles as interpreted by the Michigan courts.https://repository.law.umich.edu/books/1117/thumbnail.jp

Digital Twinning remote laboratories for online practical learning, Production & Manufacturing Research

The COVID19 pandemic has demonstrated a need for remote learning and virtual learning applications such as virtual reality (VR) and tabletbased solutions. Creating complex learning scenarios by developers is highly time-consuming and can take over a year. It is also costly to employ teams of system analysts, developers, and 3D artists. There is a requirement to provide a simple method to enable lecturers to create their own content for their laboratory tutorials. Research has been undertaken into developing generic models to enable the semiautomatic creation of virtual learning tools for subjects that require practical interactions with the lab resources. In addition to the system for creating digital twins, a case study describing the creation of a virtual learning application for an electrical laboratory tutorial is presented, demonstrating the feasibility of this approach

Some notes on premeiocytes in wheat : (premeiotic mitosis, premeiotic interphase, archesporial cell, pollen mother cell)

Some characteristics of wheat premeiocytes are described as they appear in electron microscopy. These include changes in the endoplasmic reticulum of archesporial cells in premeiotic mitosis (PMM) and some nuclear and cytoplasmic developments in premeiotic interphase (PMI).H. A. McQuade and Ann M. Young-Rottler, Department of Radiology, School of Medicine, University of Missouri--Columbia

The thermal expansion coeffcient of monolayer, bilayer and trilayer graphene derived from the strain induced by cooling to cryogenic temperatures

This is the author accepted manuscript. The final version is available from the American Institute of Physics via the DOI in this recordData availability: The data that support the findings of this study are available from the corresponding author upon reasonable request.While thermally cycling monolayer, bilayer and trilayer graphene between 5 K and 300 K Raman spectroscopy has shown that cooling to 5 K induces a strain in these graphene flakes of −0.081 ± 0.003%. This strain was used to measure the graphene thermal expansion coefficient (TEC) which was found to be (−3.2±0.2)×10−6 K −1 for monolayers, (−3.4 ± 0.4) × 10−6 K −1 for bilayers and (−3.8 ± 0.6) × 10−6 K −1 for trilayers at room temperature. The TEC showed a similar temperature dependence across all graphene thicknesses and was found to be in good agreement with theoretical predictions. This study thus represents the first measurement of the TEC of bilayer and trilayer graphene. Modification of graphene flakes of all thicknesses with various electrical contact designs was found to have no significant impact on the resulting strain, and thus the TEC, compared to the pristine graphene.Engineering and Physical Sciences Research Council (EPSRC)Leverhulme Trus

Hospitalization rates in patients switched from oral anti-psychotics to aripiprazole once-monthly: final efficacy analysis

Abstract Objective: To compare hospitalization rates in patients with schizophrenia treated prospectively with aripiprazole once-monthly 400 mg (AOM 400; an extended-release injectable suspension) vs the same patients\u27 retrospective rates with their prior oral anti-psychotic therapy. Research design and methods: Multi-center, open-label, mirror-image, naturalistic study in a community setting in North America. Patients who required a change in treatment and/or would benefit from long-acting injectable anti-psychotic therapy were treated prospectively for 6 months with AOM 400. Retrospective data on hospitalization rates were obtained. Clinical trial registration: ClinicalTrials.gov: NCT01432444. Main outcome measures: The proportion of patients with \u3e/=1 psychiatric inpatient hospitalization with oral anti-psychotic therapy examined retrospectively (months -4 to -1 before oral conversion) and after switching to AOM 400 (months 4-6 after initiating AOM 400). Results: Psychiatric hospitalization rates were significantly lower when patients were treated with AOM 400 compared with oral anti-psychotic therapy both in the 3-month primary efficacy sample (2.7% [n = 9/336] vs 27.1% [n = 91/336], respectively; p \u3c 0.0001) and in the total sample (6-month prospective rate: 8.8% [n = 38/433] vs 6-month retrospective rate: 38.1% [n = 165/433]; p \u3c 0.0001). Discontinuations due to adverse events (AEs) during cross-titration were lower in patients cross-titrated on oral aripiprazole for \u3e1 and(2.9% [n = 7/239]) compared with patients cross-titrated fo