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Experimental investigation of the polyhedral structure of balanced incomplete block designs
No full textWe examine the polyhedral structure of Balanced Incomplete Block Designs (BIBDs) in an effort to improve runtimes for finding optimal solutions via constraint or integer program. For example, an optimal BIBD is one that minimizes the range of blocksums. This range, which we refer to as diffsum, has applications in drug trials and Redundant Arrays of Independent Disks (RAID). We present two models for imposing lexicographical order on the solutions to reduce the search space. The polytope we explore is the convex hull of all lexicographically-ordered BIBD solutions satisfying a given set of parameters, (v, b, r, k, λ), with solutions represented as a vector in Rkb. The dimension-reducing equations and the facets for some of the smaller polytopes were found by using the Double-Description Method on an algebraic program modelling these solutions. Because of the presence of the lexicographic ordering, none of these polytopes are full dimensional. After describing some of these smaller BIBD polytopes, we generalize some dimension-reducing equations, and evaluate the efficiency of these equations to optimization models. A third model is also presented that provides a complete, compact description of BIBD
The Characterization of Phase Center of Multi-band GNSS Antenna and the Design of V2V Antenna, along with Channel Analysis in Rural Propagation Scenarios
No full textThe wireless communication network has been vastly improved in the past decades. A high-precise positioning system and reliable wireless network has become an essential part of our daily life, especially Cellular Vehicle-to-Everything (C-V2X). It got most benefit development in Telematics Control Unit (TCU) of Vehicle E/E architecture. The TCU is main including the positioning and wireless connectivity. This research work focus on the automotive multi-band GNSS positioning antenna and Vehicle-to-Vehicle connectivity antenna. High-precision Global Navigation Satellite System (GNSS) positioning is a promising technology that will be employed in future automotive navigation systems. This system will comprise the United States' Global Positioning System (GPS), the Russian Federation's Global Orbiting Navigation Satellite System (GLONASS), China Beidou Navigation Satellite System (BDS), and the European Union's Galileo. The significant enhancement in accuracy and precision is achieved through multiband signal transmission, carrier phase correction, and Real Time Kinematic (RTK). However, due to the current limitations of large-sized and expensive survey-grade antenna solutions, widespread adoption of this technology in the automotive sector remains challenging. In Chapter 3, it presents a cost-effective small-sized multi-band ceramic GNSS patch antenna from its design stage to real sample fabrication. Furthermore, an investigation into this patch antenna reveals absolute phas center variation measured within an indoor range for accurate received signal phase error correction. Additionally, the study explores the integration of this low-cost antenna solution into a standard multi-band automotive antenna product. We evaluate this product both independently within an indoor range setting and on a typical vehicle roof at an outdoor range facility. Utilizing these evaluation findings enables us to achieve precise receiver position estimation with minimal phase motion errors. Vehicle-to-Everything (V2X) communications will be an integral component of future autonomous drive decision systems, necessitating the establishment of a robust communication channel between end-to-end devices. However, existing cellular electromagnetic (EM) wave propagation models do not adequately suit V2X direct communication applications due to variations in antenna placement on vehicles. To address this issue, the Chapter 4 focuses on analyzing the propagation channel in a rural Vehicle-to-Vehicle (V2V) scenario for vehicular communication through antenna position experiments at different heights. By employing the ray-tracing algorithm, this research constructs a simulation model for a rural scenario using Commercial-off-the-Shelf (COTS) EM modeling software that calculates path loss received power and delay spread within a given propagation channel. Furthermore, it conducts real-world vehicle measurements to validate our simulation results, which demonstrate good agreement between simulated and measured receiver power. This study considers two types of antennas located at three different relative heights between the two vehicles and provides valuable insights to V2V antenna characteristics, antenna placement, and vehicle communication channel analysi
Providing Spiritually & Culturally Sensitive End of Life Care in the Arab American Community
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Minutes of the Formal Session of the Oakland University Board of Trustees, February 2, 2024
No full textA. Pledge of Allegiance | B. Call to Order | C. Roll Call | D. President's Report | E. Consent Agenda for Consideration/Action; Consent Agenda; Treasurer's Report'; Minutes of the Board of Trustees Formal Session of December 4, 2023; Acceptance of Gifts and Pledges to Oakland University for the Period of November 21, 2023 through January 26, 2024; Acceptance of Grants and Contracts to Oakland University for the Period of November 1 – December 31, 2023; Approval of Honorary Degree for Camille Jayne; Approval of Honorary Degree for Nora Chapa Mendoza; Approval of Honorary Degree for Bruce Miller; Approval of Honorary Degree for Daniel Skovronsky; Creation of the Oakland University Eye Research Institute Constitution; Authorization for Leasing Space at Oakland West Campus to Community Partners; Amended Board of Trustees Contracting and Employment Appointment Authority Policy; Amended Board of Trustees Competitive Bidding Purchasing Policy | F. New Items for Consideration/Action: Resolution of the Oakland University Board of Trustees Recognizing the Achievement of "Aspire. Advance. Achieve. The Campaign for Oakland University; Bachelor of Science in Data Science; Oakland University School of Nursing Simulation Laboratory Expansion | G. Other Items for Consideration/Action that May Come Before the Board | H. Adjournmen
