• Neutrality is Polite Oppression: How critical librarianship and pedagogy principles counter neutral narratives and benefit the profession

      Ferretti, Jennifer A.; Maryland Institute College of Art (The University of Arizona, 2018-11-28)
      The debate about whether or not libraries and information professionals should be neutral seems perpetual. Championing neutrality over a critical perspective intentionally furthers the oppression of not only marginalized patron populations, but of marginalized colleagues. Rooted in principles of critical pedagogy and critical librarianship, this talk will illustrate how neutrality impacts the information professions and the communities we serve, as well as ways in which our expectations of our students to critically evaluate sources can be applied to our own work. We ask our students to think about what information is missing within a resource. It’s time we not only ask our profession the same (who isn’t at the table, what isn’t being discussed, etc.), but also that we take action to counter narratives of neutrality in our everyday practices, including in the classroom and our work spaces.
    • Design Thinking in an Hour? Or, Design Thinking: A Cautionary Tale

      Arteaga, Roberto; Pacific Lutheran University (The University of Arizona, 2018-11-16)
      Design thinking (DT) is a methodology that has become popular across many sectors due to its iterability and flexibility. As its adoption spreads throughout higher education settings, DT is now starting to appear in library literature and conferences. As teaching librarians, we may be tempted to adapt popular methodologies in the hope of increasing the reach of our work, considering how undervalued and misunderstood our work can be, but we should also consider whether DT is a potentially harmful practice. By discussing DT, what it can do, and where it can be most useful, I will present a case for why librarians who teach need not engage in a practice that treats learning as something that needs a solution and appears to sideline students and their lived experiences. Those who practice critical librarianship would be better served by adopting a student-centered pedagogy that shifts power and agency to the students, while simultaneously educating others on the work they do, why they do it, and how it contributes to student learning.
    • Critical Approaches to Evaluating Student Privacy & 3rd Party Apps

      The University of Arizona, 2018-11-16
      This information literacy resource was created by participants and facilitators during a workshop titled "Student privacy & third-party apps : Examining a university’s Terms of Service" at CLAPS 2018. Through reading actual contracts between technology vendors and the University or Arizona, the group of academic librarians, library administrators, and faculty developers synthesized the steps to take and information to look for in these contracts to better understand how student and worker information is collected and used by third-party vendors.
    • Practising Digital Pedagogy Librarianship: Building Critical and Queer Feminist Communities

      Patel, Kush; Cong-Huyen, Anne; University of Michigan (The University of Arizona, 2018-11-16)
      This workshop, led by the Digital Pedagogy Librarians at the University of Michigan Libraries, aims to address the nature and nurturing of digital pedagogy librarianship beyond its relationship to digital tools to ask: what roles do critical and queer feminist principles play in enriching our approaches to digital pedagogy and how might we constitute mutually transformative communities of practice around those principles?
    • Disrupting Traditional Power Structures in Academic Libraries: Saying No, How to Do it, and Why it Matters

      Cassidy, Melanie; Versluis, Ali; Menzies, Erin; University of Guelph; University of Guelph; Ontario Ministry of Health and Long-Term Care (The University of Arizona, 2018-11-16)
      Many academic libraries face austerity measures, personnel reductions, or compression; the weight of increased workloads results in diminished mental health, increased precarity, and an inability to engage in critical teaching and learning practices. These challenges sit at the intersection of resilience, precarity, and neoliberalism. Within academic libraries, resilience is endorsed as a means of negotiating precarious employment by encouraging non-permanent staff to continually prove their value to the institution or risk not being retained. The neoliberal perspective endorses an environment where individual culpability is assigned at the cost of challenging institutional practices. This session seeks to interrogate our position as library staff within this construct, both in terms of how we are influenced by this intersection and how we support it. Participants will share experiences, develop best practices, and establish a “resilience taxonomy” to provide support in resisting overwork, precarity, and other negative side-effects of the neoliberal academic library.
    • Contested Sites of Critical Library Pedagogy

      Almeida, Nora; Beilin, Ian; New York City College of Technology, CUNY, Brooklyn, NY; Columbia University, New York, NY (The University of Arizona, 2018-11-16)
      In this presentation we will explore critical library pedagogy in relation to different physical places and dialogic spaces. Using the idea of the library as a “third space” as a point of departure, we will consider whether alternative spatial contexts or modes of analysis might enable new forms of critique that are embodied, culturally grounded, and creative.
    • Constraint Gain for Two Dimensional Magnetic Recording Channels

      Bahrami, Mohsen; Vasic, Bane; Marcellin, Michael; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2018-11)
      In this paper, we study performance gains of constrained codes in Two dimensional Magnetic Recording (TDMR) channels using the notion of constraint gain. We consider Voronoi based TDMR channels with realistic grain, bit, track and magnetic-head dimensions. Specifically, we investigate the constraint gain for two-dimensional no-isolated-bit constraint over Voronoi based TDMR channels. We focus on schemes that employ the generalized belief propagation algorithm for obtaining information rate estimates for TDMR channels.
    • CURRENT AND FUTURE DEVELOPMENTS IN FLIGHT TEST CONFIGURATION TECHNIQUES

      Whittington, Austin; Ibaroudene, Hakima; Abbott, Ben; Yao, Di; Hite, Joseph; Bapty, Theodore; Moskal, Jakub; Neumann, Michael; Southwest Research Institute; Vanderbilt University; et al. (International Foundation for Telemetering, 2018-11)
      As technologies like network-based telemetry and standardized configuration languages begin to see wider adoption within the flight test community, new techniques exploring the new possibilities they provide are also developed. This paper reviews a subset of these techniques, including successful use in commercial flight test, focusing on the concepts of constraints and their application in the field, specifically their use in helping users to create correct-by-construction configurations. We then explore ongoing efforts with the Air Force and DARPA to extend these techniques into constraint satisfaction and real-time adaptation, providing the ability to create and adapt configurations to match (possibly changing) test requirements.
    • PROTECTION OF THE MIL-STD-1553 WITH DISCRETE WAVELET ALGORITHMS

      Fansler, Aaron; Ampex Intelligent Systems (International Foundation for Telemetering, 2018-11)
      This paper reviews at a high level Ampex’s Black Lightning capability. The Black Lightning capability tool was developed to be the first cyber defensive tool specifically designed to work at the field device component level of a Control System (CS). BLACK LIGHTNING is a passive, real-time monitoring and detection tool designed and built specifically for control systems professionals. The BLACK LIGHTNING capability uses a patent pending detection algorithm, which scans SCADA specific protocols for any anomalous activity within the customer defined component thresholds. In doing this BLACK LIGHTNING is able to alerting operators of any abnormal activity for further investigation faster than anything currently on the market. One can look at the internals of an aircraft as multiple layers of control systems working together. As defined, “A control system is a collection of mechanical and electrical equipment that allows an aircraft to be flown with exceptional precision and reliability”. An aircraft has many control systems. These systems consist of fuel, heat, speed, altitude, hydraulics, navigation, communications, sensors, actuators, servos, multiple computers just to name a few as examples. At Ampex, we view a control system as what it is, a control system. The process(es) above that the control system(s) is transparent to us. If you protect the system and subsystems below the process then by default you will protect the process above regardless if it’s an industrial power plant, nuclear power plant, water facility, manufacturing plant or an aircraft. At Ampex we protect the process by monitoring and protecting the systems below.
    • CFO Estimation by Exploiting Channel Sparsity in Aeronautical Telemetry

      Afran, Shah; Saquib, Mohammad; Rice, Michael; The University of Texas at Dallas; Brigham Young University (International Foundation for Telemetering, 2018-11)
      In this paper, we explore a carrier frequency offset (CFO) estimation scheme with sparsity-constraint (SC) on the aeronautical telemetry channels. This SC CFO estimator is implemented in two steps. In the first step, channel support is recovered by combining compressed sensing techniques with the CFO estimate based on the non-sparsity constraint (NSC) on the channel. Next we use the estimated channel support to derive the SC CFO estimator. Simulations are performed to compare the performance of the SC CFO estimator against the existing NSC CFO estimators using shaped offset QPSK version TG (SOQPSK-TG) modulated iNET-formatted data over an aeronautical test channel.
    • The Design and Application of C-band Base Station Based Multi-target Telemetry Network System

      Shiwei, Guo; Zhongjie, Wang; Xin, Zhang; Zhaohui, Huo; Chinese Flight Test Establishment (International Foundation for Telemetering, 2018-11)
      A C-band base station based multi-target telemetry network system for flight test is designed in this paper. The requirements of multi-target transmission are realized by TDMA and TDD technology. And the transmission rate of up to 50 Mbps is provided by the high efficient modulation method. An integrated air-to-ground telemetry network is built with C-band wireless two-way link. The telemetry signals of super large airspace are covered seamlessly through multiple base stations, therefore the shortage of current telemetry is solved, and the demand of multi-target and mass date transmission for flight test is satisfied. The development of the system provides technical support for the high speed data transmission of the flight test, which will lay a foundation for the construction of integrated air-to-ground test and the test network system.
    • SPARSE CHANNEL ESTIMATION WITH REGULARIZATION METHODS IN MASSIVE MIMO SYSTEMS

      Peken, Ture; Tandon, Ravi; Bose, Tamal; Univ Arizona (International Foundation for Telemetering, 2018-11)
      Massive multiple-input multiple-output (MIMO) technology has recently gained a lot of at- tention as a candidate technology for the next generation wireless systems. With a higher number of antennas, pilot-based channel estimation faces a limitation in the number of or- thogonal pilots to be used among users in all cells. Sparse channel estimation by using regularization methods can reduce the pilots compared to pilot-based channel estimation. In this paper, we study two regularization methods: least absolute shrinkage and selection operator (lasso) and elastic net. We investigate the performance of least squares (LS), lasso, and elastic net when the sparsity of the channel changes over time. We study the optimum tuning parameters for lasso and elastic net based channel estimators to achieve the best performance with the di erent number of pilots and values of signal-to-noise ratio (SNR). Finally, we present the asymptotic analysis of LS, lasso, and elastic net based channel esti- mators.
    • CODE-AIDED TIMING SYNCHRONIZATION FOR MULTI-H CPM AT LOW SIGNAL-TO-NOISE RATIO

      Shunqin, Xie; Ke, Zhou; Dahai, Chen; Xianglu, Li; Institute of Electronic Engineering, China Academy of Engineering Physics (International Foundation for Telemetering, 2018-11)
      In order to solve the problem of timing synchronization at low signal-to-noise ratio(SNR) for Multi-h CPM, a code-aided early-late loop(ELL) algorithm is proposed. The algorithm is based on the iterative detection of serially concatenated Multi-h CPM with convolutional codes. The ELL timing estimator based on sequence detection is extended to the maximum-logarithmic maximum a posteriori (max-log MAP) detection. By using the information updated by iterative detection, the timing accuracy of multi-h CPM can be improved at low SNR. The simulation results show that, even when the bit signal-to-noise ratio (Eb/No) is as low as 3dB~5dB, the estimating variance of the proposed synchronization can be close to the Cramer Rao bound(MCRB) of ARTM CPM. After this timing synchronizing, the detection performance of the 10th iteration is only 0.03dB loss compared with the performance with ideal synchronization.
    • SPECTRUM MANAGEMENT SYSTEM – FREQUENCY ASSIGNMENT DE-CONFLICTION AND RF LINK QUALITY PREDICTION

      Madon, Phiroz H.; Young, Tom; O’Brien, Thomas; Radke, Mark; Vencore Labs Development Team; Test Resource Management Center (International Foundation for Telemetering, 2018-11)
      DoD test ranges are experiencing ever-expanding needs for air-to-ground telemetry bandwidth, and hence are under pressure to manage the telemetry spectrum resource with high efficiency. The Spectrum Management System (SMS) provides test range operations staff with advanced tools for frequency de-confliction and air-to-ground RF link quality prediction for upcoming test flights. Additional features of the system include: automated, algorithmbased frequency de-confliction and assignment; record-keeping and automated archiving of frequency assignments, to be used for spectrum defense; 3-D GIS terrain-based coverage maps, displaying predicted air-to-ground link quality in each part of upcoming flights; determination of opportunities for frequencies reuse. Innovations include: addressing the combinatorial NP-hard problem of frequency assignment by applying multiple real-world constraints in a specified order; using a spectrum white space closest-fit algorithm to minimize spectrum fragmentation; creating space-time-frequency quanta in the database to store RF emissions for rapidly-moving aircraft.
    • A New Network Telemetry technique In Aviatic Flight Tests

      Xingguo, Zhang; Hong, Li; Guojin, Peng; Zanchao, Wang; Chinese Flight Test Establishment (International Foundation for Telemetering, 2018-11)
      In order to address the issue of insufficient telemetry frequencies in flight tests, a telemetry transmission solution is proposed to transmit the principal parameters and HUD video for multiple aircrafts based on bi-directional wireless network. All the key points including the wireless transmission architecture for airborne and ground integration, network resources management, and dynamic configuration of airborne test system are illustrated. The research result has been verified in flight tests, and the experimental methods and results are presented as well.
    • IMPACT OF PARAMETER SELECTION IN SOFT-DECISION FEEDBACK TURBO EQUALIZATION

      Nassr, Husam; Kosbar, Kurt; Missouri University of Science & Technology, Dept. of Electrical & Computer Engineering (International Foundation for Telemetering, 2018-11)
      In wireless communication systems, turbo equalization has been used to mitigate the intersymbol interference caused by dispersive channels. Despite its computational complexity, turbo equalization achieves high performance compared to systems that implement the equalization and coding processes separately. The large performance gain achieved through turbo equalization comes from exchanging soft information between the equalizer and decoder in an iterative manner. However, the computational complexity of turbo equalization can be a significant challenge for systems with limited hardware capabilities. This paper examines the performance gain versus computational complexity trade-off for a soft-decision feedback turbo equalizer (SDFTE).We show how to select parameters that achieve a desired performance specification, while minimizing implementation overhead. Sample results are presented from a simulation of a system using a Proakis channel exhibiting severe ISI using QPSK, 8PSK and 16QAM modulation schemes.
    • ELIMINATING WIRING IN AIRCRAFT INSTRUMENTATION THROUGH ENERGY HARVESTING

      Thompson, Rebecca; Hull, Thalia; Rice, Dr. Michael; BYU, Department of Electrical and Computer Engineering; BYU, Department of Mechanical Engineering (International Foundation for Telemetering, 2018-11)
      Installing the many sensors required for flight testing is currently a difficult and awkward process requiring significant wiring. Short term sensor installation could be greatly improved if individual sensors did not have to be connected to a distant power source. This paper proposes that small aerodynamic vibration energy harvesting devices could provide power directly to sensors and simplify installation. To investigate feasibility, the simplest known energy harvester configuration is chosen. A mathematical model to represent the device is then developed. A test scenario using the aerodynamic vibrations present on the F-15B aircraft is then incorporated into the model. The test results are analyzed to determine if the energy harvesting device can produce sufficient energy to justify further analysis. Finally, potential design improvements are discussed.
    • Network Scheduling Algorithm with Efficient Backfill Process in the iNET

      Roh, Dongseok; Oh, Jonghun; Agency for Defense Development (International Foundation for Telemetering, 2018-11)
      One of the major advantage of integrated Network Enhanced Telemetry (iNET) system is data backfill. In the iNET, network data server requests signal retransmission from the on-board recorder when the signal dropout is detected, and data is retransmitted which leads successful reception. If there are numerous test articles (TA), however, multiple backfill process for signal request and data retransmission can cause undesirable capacity waste. This paper describes the improved backfill process in iNET with multiple TAs. This process includes grouping and scheduling algorithm within TAs, and the orthogonal and non-orthogonal transmission. The system model and results are analyzed by simulation.
    • Research on Application Technology of Intelligent Wireless Sensor Network in Flight Test

      Chen, Peng; Jiang, Hongwei; Yan, Yihong; Chinese Flight Test Establishment (International Foundation for Telemetering, 2018-11)
      Aimed at the problems of many test parameters, complicated lead wires, large additional weight, lack of flexibility and expandability as well as low level of intelligence and networkability of existing aircraft test flight test systems, with the application requirements of intelligent wireless sensor network for flight test technologies as the lead, this paper makes research on key technologies of intelligent wireless sensor network in aircraft flight test, and focuses on the synchronous acquisition system architecture, real-time protection method, and data transmission reliability checking method and the development of acquisition and recording system for wireless sensor networks based on the iNET standard for aircraft flight test. Besides, this paper also performs simulation and engine ground test verification which laid the foundation for the application of intelligent wireless sensor network technology in aircraft flight test.
    • COMPREHENSIVE SPECTRUM MONITORING SYSTEM (COSMOS) FOR NEXT-GENERATION SPECTRUM SITUATIONAL AWARENESS

      Ziegler, Robert; Triolo, Anthony; Samtani, Sunil; Weaver, Joshua; Perspecta Labs; US Naval Sea Systems Command (International Foundation for Telemetering, 2018-11)
      Comprehensive Spectrum Monitoring System (COSMOS) is Perspecta Labs’ solution for Next-Generation Spectrum Situational Awareness (NGS2AS), a Spectrum Access R&D Program solicited and awarded through the National Spectrum Consortium. COSMOS will incorporate a mix of low-cost unattended RF sensors, networked using industry-standard interfaces; versatile back-end server processing and storage of sensor data; spectrum data analytics, reporting and visualization; and incorporation of historical and projected frequency usage data from DoD systems for planning of training and test missions. This paper describes the architecture and design of the COSMOS system and its sensor and server subsystems.