Relevant bibliographies by topics / Static jammer

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Static jammer'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Static jammer"

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Dimc, Franc, Polona Pavlovčič Prešeren, and Matej Bažec. "Operation of geodetic GNSS instruments under chirp signal L1 jamming." Geodetski vestnik 65, no. 02 (2021): 189–204. http://dx.doi.org/10.15292/geodetski-vestnik.2021.02.189-204.

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This paper presents the results of a vulnerability test of several geodetic Global Navigation Satellite System (GNSS) receivers in case of intentional signal interference in the frequency L1 for GPS (Global Positioning System). Nine instruments from different manufacturers (i.e., Leica Geosystems AG, Trimble Inc., Javad GNSS) were tested. The test was based on static and kinematic jamming. A static scenario with three-minute interruptions was followed by experiments with a stationary jammer located at distances from 10 m to 160 m from the receivers. For short-term kinematic interference, the jammer was installed in the vehicle, which passed the GNSS instruments at different speeds. An analysis of different scenarios showed that the jammer interrupted GPS but not GLONASS signals in certain situations. Since Galileo was not nominally operational at the time of the July 2019 measurements, only GPS and GLONASS were eligible for the study. The geodetic GNSS instruments reacted to the interruptions with a decreased signal-to-noise-ratio (SNR) and either with a complete inability to determine the code/phase position or with an incorrect calculation of phase ambiguities (initialization), which also affected the quality of the positioning. The proximity of the jammer played the most significant role in the complete inability to receive the signal; however, for the incorrect positioning longer duration of jamming was also a reason.
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Bažec, Matej, Franc Dimc, and Polona Pavlovčič-Prešeren. "Evaluating the Vulnerability of Several Geodetic GNSS Receivers under Chirp Signal L1/E1 Jamming." Sensors 20, no. 3 (2020): 814. http://dx.doi.org/10.3390/s20030814.

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Understanding the factors that might intentionally influence the reception of global navigation satellite system (GNSS) signals can be a challenging topic today. The focus of this research is to evaluate the vulnerability of geodetic GNSS receivers under the use of a low-cost L1/E1 frequency jammer. A suitable area for testing was established in Slovenia. Nine receivers from different manufacturers were under consideration in this study. While positioning, intentional 3-minute jammings were performed by a jammer that was located statically at different distances from receivers. Furthermore, kinematic disturbances were performed using a jammer placed in a vehicle that passed the testing area at various speeds. An analysis of different scenarios indicated that despite the use of an L1/E1 jammer, the GLONASS (Russian: Globalnaya Navigatsionnaya Sputnikovaya Sistema) and Galileo signals were also affected, either due to the increased carrier-to-noise-ratio (C/N0) or, in the worst cases, by a loss-of-signal. A jammer could substantially affect the position, either with a lack of any practical solution or even with a wrong position. Maximal errors in the carrier-phase positions, which should be considered a concern for geodesy, differed by a few metres from the exact solution. The factor that completely disabled the signal reception was the proximity of a jammer, regardless of its static or kinematic mode.
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Dimc, Franc, Polona Pavlovčič-Prešeren, and Matej Bažec. "Robustness against Chirp Signal Interference of On-Board Vehicle Geodetic and Low-Cost GNSS Receivers." Sensors 21, no. 16 (2021): 5257. http://dx.doi.org/10.3390/s21165257.

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Robust autonomous driving, as long as it relies on satellite-based positioning, requires carrier-phase-based algorithms, among other types of data sources, to obtain precise and true positions, which is also primarily true for the use of GNSS geodetic receivers, but also increasingly true for mass-market devices. The experiment was conducted under line-of-sight conditions on a straight road during a period of no traffic. The receivers were positioned on the roof of a car travelling at low speed in the presence of a static jammer, while kinematic relative positioning was performed with the static reference base receiver. Interference mitigation techniques in the GNSS receivers used, which were unknown to the authors, were compared using (a) the observed carrier-to-noise power spectral density ratio as an indication of the receivers’ ability to improve signal quality, and (b) the post-processed position solutions based on RINEX-formatted data. The observed carrier-to-noise density generally exerts the expected dependencies and leaves space for comparisons of applied processing abilities in the receivers, while conclusions on the output data results comparison are limited due to the non-synchronized clocks of the receivers. According to our current and previous results, none of the GNSS receivers used in the experiments employs an effective type of complete mitigation technique adapted to the chirp jammer.
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Zhu, Yanmin, and Yuan Jiang. "On Optimal Antijamming Strategies in Sensor Networks." International Journal of Distributed Sensor Networks 8, no. 4 (2012): 793194. http://dx.doi.org/10.1155/2012/793194.

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Physical layer radio jamming is a serious security threat to a wireless sensor network since the network relies on open wireless radio channels. A radio jammer is typically strategic and chooses its jamming strategy in response to the possible defense strategy taken by the sensor network. In this paper we model the interaction between the sensor network and the attacker as a noncooperative nonzero-sum static game. In such a game, the sensor network has a set of strategies of controlling its probability of wireless channel access and the attacker manipulates its jamming by controlling its jamming probability after sensing a transmission activity. We propose an algorithm for computing the optimal strategies for jamming attack and network defense. A critical issue is that there may exist a number of possible strategy profiles of Nash equilibria. To address this issue, we further propose to choose realistic Nash equilibria by applying the Pareto dominance and risk dominance. Our numerical results demonstrate that the strategies chosen by the Pareto dominance and risk dominance achieve the expected performance. Our results presented in the paper provide valuable defense guidance for wireless sensor networks against jamming attacks.
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Dak, Ahmad Yusri, Nurul Fazliana Samsudin, and Noor Elaiza Abdul Khalid. "Physical Layer Jamming Attack using Waypoint Mobility Model in WLAN." Journal of Computing Research and Innovation 3, no. 2 (2018): 1–9. http://dx.doi.org/10.24191/jcrinn.v3i2.82.

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Sharing nature of wireless medium provides various challenging features among various group of users. This is one of various services offered by Wireless Local Area Network (WLAN). In addition, due to popularity of WLANs, user experience suffer from various security threats especially jamming based Denial-of-Service (DoS) attack. The attacks are focused on radio channels where the transmission channel interfere with jamming attacks by sending high frequency signal to disturb the communication between the users in network. Most of attack exists at physical layer are detected randomly movable and less static attack are found. Therefore, the objective of this research is to study the pattern of randomly movable node and performance of physical layer jamming attack using Waypoint Mobility Model. To address these evaluation, a simulation model consists of constant and random jammer will be developed using OPNET. The performance involved physical layer attack that will be evaluated using three performance metrics such as Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), and throughput by using Random Waypoint Point. Outcome concluded that these three-performance metrics can be shows as a significant impact to a detection mechanism that will enable offer insights and the level for future research based on DoS.
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Saitoh, Kuniyasu, Vanessa Magnanimo, and Stefan Luding. "A Master equation for the probability distribution functions of forces in soft particle packings." Soft Matter 11, no. 7 (2015): 1253–58. http://dx.doi.org/10.1039/c4sm02452d.

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Dong, Yuan-Xiang, Guo-Hua Zhang, Qi-Cheng Sun, Xue-Dan Zhao, and Xiao-Na Niu. "Analysis of Low-Frequency Vibrational Modes and Particle Rearrangements in Marginally Jammed Amorphous Solid under Quasi-Static Shear." Chinese Physics Letters 32, no. 12 (2015): 126201. http://dx.doi.org/10.1088/0256-307x/32/12/126201.

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Yu, JikSu, MyoungJun Kim, and KiWon Park. "Experimental investigation of ice production using a static ice-on-coil ice-making approach." Journal of Advanced Marine Engineering and Technology 44, no. 4 (2020): 282–87. http://dx.doi.org/10.5916/jamet.2020.44.4.282.

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Li, Linjie, Yongling Fu, Shicheng Zheng, Jian Fu, and Tianxiang Xia. "Friction Torque Analysis of Planetary Roller Screw Mechanism in Roller Jamming." Mathematical Problems in Engineering 2020 (March 20, 2020): 1–8. http://dx.doi.org/10.1155/2020/1392380.

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The load distribution model of the planetary roller screw mechanism (PRSM) is established on the basis of Hertz contact theory. The objective is to obtain a friction torque model of the PRSM in roller jamming. An example is provided to calculate the friction torque of the PRSM in roller jamming. Thereafter, the transmission efficiency is calculated. A static structural analysis is performed using the finite element method to estimate the contact stress between the threads of the PRSM components. Computational results indirectly reveal that roller jamming exerts considerable influence on the friction torque of the PRSM. Results show that the friction torque of the planetary roller screw increases when the roller is jammed and the wear of the parts is accelerated. This condition leads to structural failure. The results of this study can serve as a foundation for electromechanical actuation systems, which can be useful in designing antijamming systems for safety-critical aircraft applications.
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Veerati, Punnam Chander, Jennifer A. Mitchel, Andrew T. Reid, et al. "Airway mechanical compression: its role in asthma pathogenesis and progression." European Respiratory Review 29, no. 157 (2020): 190123. http://dx.doi.org/10.1183/16000617.0123-2019.

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The lung is a mechanically active organ, but uncontrolled or excessive mechanical forces disrupt normal lung function and can contribute to the development of disease. In asthma, bronchoconstriction leads to airway narrowing and airway wall buckling. A growing body of evidence suggests that pathological mechanical forces induced by airway buckling alone can perpetuate disease processes in asthma. Here, we review the data obtained from a variety of experimental models, including in vitro, ex vivo and in vivo approaches, which have been used to study the impact of mechanical forces in asthma pathogenesis. We review the evidence showing that mechanical compression alters the biological and biophysical properties of the airway epithelium, including activation of the epidermal growth factor receptor pathway, overproduction of asthma-associated mediators, goblet cell hyperplasia, and a phase transition of epithelium from a static jammed phase to a mobile unjammed phase. We also define questions regarding the impact of mechanical forces on the pathology of asthma, with a focus on known triggers of asthma exacerbations such as viral infection.
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Dissertations / Theses on the topic "Static jammer"

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Pust, Radim. "Možnosti kódového zabezpečení stanic s kmitočtovým skákáním." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233571.

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The doctoral thesis deals with design of coding for frequency hopping stations in band with intensive jamming. In digital modulations erroneous determination of the modulation state occurs due to jam at the receiver side. The result is erroneously transferred symbols of the message. Errors created during the transmission can be eliminated by using error control systems. It is also possible to prevent these errors by using algorithms (techniques) of frequency hopping which select the appropriate channel. Appropriate communication channel is a channel with a lower probability of erroneous symbol in the message. The main contribution of this thesis is to design a new frequency hopping technique with collision avoidance (FH/CA). The station with FH/CA technique measures signal levels in the considered several channels before every jump. Based on the measurements the most appropriate channel with the lowest value of measured signal level is selected. Therefore, it is more probable that a jump to an unoccupied channel with a transmission will occur. Using a mathematical model, the performance of the newly proposed FH/CA technique is compared with the currently used techniques FH and AFH. Comparison criteria are the probability of a collision between an FH/CA communication system and a static (device transmitting continuously at a fixed frequency) or dynamic jammer (i.e. other FH or AFH systems). By comparing the values of the probability of jammed transmission, indisputable theoretical advantages of the new FH/CA technique were found, compared to the currently used FH and AFH techniques. The FH/CA technique always has better or equal results compared with the FH technique in the case of interference by static and dynamic jammers. The FH/CA technique in a band with static and dynamic jammers usually has better results than the AFH technique. A significant contribution of the FH/CA technique can be seen in the case of dynamic jammers. On the other hand, in the case of static jammers the FH/CA technique is in certain situations worse than the AFH technique. The accuracy of the mathematical models were successfully verified on a simulation model that was created as a part of this thesis in the MATLAB environment. Based on the obtained data from the model there was designed coding for frequency hopping stations with the new technique of frequency hopping FH/CA which is designed for small-volume data transfer in a band with intensive jamming.
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Mayo-Bobee, Dinah. "Book Review of A Companion to James Madison and James Monroe." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/725.

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Williams, Sherese LaTrelle. "To Humbly Serve: Joseph James Dennis and His Contributions to Clark College." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2016. http://digitalcommons.auctr.edu/cauetds/53.

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The history of historically black colleges and universities (HBCUs) has been traditionally discussed using the “top-down” approach, but this oftentimes leads to the omission of the contributions of the many men and women who are essential to the success of these institutions—men like Dr. Joseph James Dennis who served Clark College for forty-seven years. During his tenure, Dennis served as the chairman of the mathematics department, homecoming committee, and institutional representative and President of the Southern Intercollegiate Athletic Conference (SIAC). The purpose of this study is to explore Dennis’ contributions and why Clark College dedicated a building in his honor. This study uses primary and secondary sources to navigate Dennis’ contributions and service. This study suggests that although historical documentation from the administrative lens is vital to posterity, the viewpoints of men and women like Dennis are equally important to the preservation of the HBCU history.
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Higgins, Brian Walter. "James Madison and the Birth of the Bill of Rights: An Analysis of the Original Intent of the First Amendment Within the Political Theory of James Madison." W&M ScholarWorks, 1995. https://scholarworks.wm.edu/etd/1539626003.

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Scannell, John School of Media Film &amp Theatre UNSW. "James Brown: apprehending a minor temporality." Awarded by:University of New South Wales. School of Media, Film and Theatre, 2006. http://handle.unsw.edu.au/1959.4/26955.

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This thesis is concerned with popular music's working of time. It takes the experience of time as crucial to the negotiation of social, political or, more simply, existential, conditions. The key example analysed is the funk style invented by legendary musician James Brown. I argue that James Brown's funk might be understood as an apprehension of a minor temporality or the musical expression of a particular form of negotiation of time by a minor culture. Precursors to this idea are found in the literature of the stream of consciousness style and, more significantly for this thesis, in the work of philosopher Gilles Deleuze on the cinema in his books Cinema 1: The Movement-Image and Cinema 2: The Time-Image. These examples are all concerned with the indeterminate unfolding of lived time and where the reality of temporal indeterminacy will take precedence over the more linear conventions of traditional narrative. Deleuze???s Cinema books account for such a shift in emphasis from the narrative depiction of movement through time the movement-image to a more direct experience of the temporal the time-image, and I will trace a similar shift in the history of popular music. For Deleuze, the change in the relation of images to time is catalysed by the intolerable events of World War II. In this thesis, the evolution of funk will be seen to reflect the existential change experienced by a generation of African-Americans in the wake of the civil-rights movement. The funk groove associated with the music of James Brown is discussed as an aesthetic strategy that responds to the existential conditions that grew out of the often perceived failure of the civil rights movement in the 1960s. Funk provided an aesthetic strategy that allowed for the constitution of a minor temporality, involving a series of temporal negotiations that eschew more hegemonic, common sense, compositions of time and space. This has implications for the understanding of much of the popular music that has followed funk. I argue that the understanding of the emergence of funk, and of the contemporary electronic dance music styles which followed, would be enhanced by taking this ontological consideration of the experiential time of minorities into account. I will argue that funk and the electronic dance musics that followed might be seen as articulations of minority expression, where the time-image style of their musical compositions reflect the post-soul eschewing of a narratively driven, common sense view of historical time.
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Carson, Elizabeth F. ""An Inordinate Sense of History": James Renwick Willson 1780-1853." W&M ScholarWorks, 1987. https://scholarworks.wm.edu/etd/1539625410.

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Klein, Alexander Mugar. "The rise of empiricism William James, Thomas Hill Green, and the struggle over psychology /." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3274251.

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Thesis (Ph.D.)--Indiana University, Dept. of Philosophy, 2007.<br>Source: Dissertation Abstracts International, Volume: 68-07, Section: A, page: 2976. Adviser: Elisabeth A. Lloyd. Title from dissertation home page (viewed Mar. 28, 2008).
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Reddinger, Amy. "Domestic inversions, domestic interventions : mapping the postwar formation of home, school, and family /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/9360.

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Scott, John Thomas. "James McGready: Son of Thunder, Father of the Great Revival." W&M ScholarWorks, 1991. https://scholarworks.wm.edu/etd/1539623808.

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This dissertation is a biography of James McGready (c.1760-1817), a Presbyterian revivalist minister who lived and worked primarily in Pennsylvania, North Carolina, Kentucky, and Indiana. He is best known as the Father of the Great Revival, an evangelical revival that spread throughout the southeastern United States between 1800 and 1805, and the creator of the camp meeting, which soon became an institutional part of American revivalism. Historians have generally described McGready as an innovator in matters of doctrine and revivalist methodology. This study argues that McGready is better understood as a traditionalist. This interpretation follows several recent works that have outlined a Scottish and Scotch-Irish Presbyterian revivalist tradition dating from the 1620s.;The study traces McGready's educational background, outlines a variety of his theological positions, describes his intense homiletical style, and details his professional career. Research revealed that McGready was educated in several small Presbyterian-run schools that had direct links to the Presbyterian revivalism mentioned above. In doctrine, an examination of such varied topics as the process of conversion, limited atonement and predestination, and millennialism, showed McGready to be a firm Presbyterian Calvinist at every turn. In his homiletical style McGready followed a one hundred and fifty year old pattern of preaching known as the plain style and avoided the unstructured, extemporaneous preaching increasingly favored by revivalists in the nineteenth century. During his professional career, and especially during the Cumberland controversy of 1805-1809, McGready sided with the mainline church and eschewed those with schismatic inclinations.;The reinterpretation of McGready as a traditionalist casts doubt on much of the historiography of American revivalism. Historians have generally argued that revivalism arose in America and especially on the frontier. Understanding McGready, one of the foremost revivalists of the period, as a traditionalist tends to undermine that position. Additionally, this work re-emphasizes the transference of European forms to the New World, even past the American Revolution. Finally, McGready's professional struggles point up the remarkable fluidity in American religion during the early national period.
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Chapman, Charles Thomas. "Who Was Buried in James Madison's Grave?: A Study in Contextual Analysis." W&M ScholarWorks, 2005. https://scholarworks.wm.edu/etd/1539626487.

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Books on the topic "Static jammer"

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Alexander, Keefe, Anfam David, and Gagosian Gallery (London England), eds. Robert Rauschenberg: Jammers. Gagosian Gallery, 2013.

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Office, General Accounting. Electronic warfare: Need to strengthen controls over Air Force jammer programs : report to the chairman, Committee on Armed Services, House of Representatives. The Office, 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United, States Congress Senate Committee on Governmental Affairs Subcommittee on Federal Services Post Office and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Airborne Self-Protection Jammer Program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred First Congress, second session, May 11, 1990. U.S. G.P.O., 1990.

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United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Federal Services, Post Office, and Civil Service. Procurement irregularities associated with the Department of Defense's airborne self-protection jammer program: Hearing before the Subcommittee on Federal Services, Post Office, and Civil Service of the Committee on Governmental Affairs, United States Senate, One Hundred Second Congress, second session, March 25, 1992. U.S. G.P.O., 1992.

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Book chapters on the topic "Static jammer"

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Miller, D. Quentin. "James Baldwin." In A Companion to Twentieth-Century United States Fiction. Wiley-Blackwell, 2009. http://dx.doi.org/10.1002/9781444310108.ch32.

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Izatt, Reed M. "James J. Christensen 1931–1987." In United States-Japan Seminar on Host-Guest Chemistry. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0969-4_15.

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Mullan, P. Carl. "E-Bullion and Mr. James Fayed." In A History of Digital Currency in the United States. Palgrave Macmillan US, 2016. http://dx.doi.org/10.1057/978-1-137-56870-0_4.

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Hart, David M., Gary Chartier, Ross Miller Kenyon, and Roderick T. Long. "James Mill, “On Those Who Pillage and Those Who Are Pillaged” (1835)." In Social Class and State Power. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64894-1_11.

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Edwards, Philip. "The Coming of the Stuarts: James I, 1603–25." In The Making of the Modern English State, 1460–1660. Macmillan Education UK, 2001. http://dx.doi.org/10.1007/978-0-333-99383-5_8.

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Musgrave, Richard A. "Comments on James M. Buchanan “The Fiscal Crisis in Welfare Democracies”." In The Welfare State, Public Investment, and Growth. Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-67939-4_2.

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Sofi, Waseem Ahmad. "Autonomy of Jammu and Kashmir in the Context of Indian Constitution." In Autonomy of a State in a Federation. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1019-6_3.

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Sofi, Waseem Ahmad. "Erosion and Demand of Autonomy in the State of Jammu and Kashmir." In Autonomy of a State in a Federation. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1019-6_4.

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Singh, Shekhar. "Three Different Critiques of Rationalism: Friedrich Hayek, James Scott and Michael Oakeshott." In Michael Oakeshott on Authority, Governance, and the State. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17455-2_11.

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Bruwelheide, Karin S., Douglas W. Owsley, Beverly A. Straube, and Jamie E. May. "Evidence for Early Seventeenth-Century Surgery and Dissection at James Fort, Virginia." In The Bioarchaeology of Dissection and Autopsy in the United States. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26836-1_3.

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Conference papers on the topic "Static jammer"

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Yu, Jirong. "James Barnes Memorial Poster I." In Advanced Solid-State Photonics. OSA, 2005. http://dx.doi.org/10.1364/assp.2005.mf1.

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Tayeb, Raihan, Yijin Mao, and Yuwen Zhang. "Numerical Simulation of Jamming Transition in Granular System Under Cyclic Compression Using Smooth Particle Hydrodynamics." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67553.

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The jamming of granular materials, which indicates how disordered particle systems change from mechanically unstable to stable states, has attracted significant recent interest due, but not limited, to the appearance of jamming transition or similar behavior in a broad variety of systems. Recent experiments on jamming transition have revealed the relationship between mean coordination number and packing fraction for different jammed states. In this paper the jamming states of two dimensional granular materials under cyclic compression using Smooth Particle Hydrodynamics (SPH) approach is numerically investigated. The SPH method allows one to study the stress developed within individual granular particles of arbitrary shape. In this study the granular system is cyclically and isotropically compressed or expanded. The system undergoes a range of jamming states over a large number of cycles. We measure the evolution of global pressure, mean coordination number, and packing fraction. The force chains and probability density function of force for different compression cycles are also investigated.
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Li, M. J., T. Atachi, K. Jackson, et al. "MEMS MICROSHUTTER ARRAY SYSTEM FOR JAMES WEBB SPACE TELESCOPE." In 2008 Solid-State, Actuators, and Microsystems Workshop. Transducer Research Foundation, 2008. http://dx.doi.org/10.31438/trf.hh2008.20.

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E Silva, Gabriel, and Clayton Mamedes. "Reflection and practice on generative music structuring: the formal problem of ergodicity." In Simpósio Brasileiro de Computação Musical. Sociedade Brasileira de Computação - SBC, 2019. http://dx.doi.org/10.5753/sbcm.2019.10428.

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This article approaches the subject of musical form from the standpoint of an algorithmic composition practice. It introduces the problem of ergodicity in music, a formal situation at which music development is perceived as static. The concepts of ​General Periodicity by Henri Pousseur and ​Temporal Gestalt by James Tenney gave support to a reflection on the nature of the problem, as well as to formulate a twofold structuring procedure based on ideas of continuity and segmentation of the musical course. The devised method was implemented as a computer program to produce entire pieces of music.
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McNelly, Brendan P., Robert Leary, Sean Brennan, and Karl Reichard. "Characterizing Successful Robotic Insertion and Removal From a Dry Storage Cask Using Peg-Like Jamming and Wedging Analysis." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63634.

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This paper describes the derivation and experimental validation of geometric equations that govern insertion and extraction of a robotic inspection system that operates in gaps around vertical dry storage casks. During insertion, a robotic system may become jammed due to unbalanced forces acting on the robot, or wedged due to over-sized robot geometry. The robot must be removable by a tether in the event of power loss. Assuming simplified geometry and a quasi-static approach, the problem is modeled using a two-dimensional representation in which the robot is assumed to be rigid with equal weight distribution and a constant friction coefficient between surfaces. Equilibrium equations are derived from a modified peg-insertion formulation, allowing calculation of the maximum size of the robot and angle of insertion as a function of inspection gap geometry and friction. Experimentation tested the derived relationships using varying robot dimensions in a 1:1 scale mock-up of the overpack-to-canister gap space of a nuclear dry storage container. Experimental data confirmed that the modifications of the typical peg-insertion predicted successful insertion and extraction better than unmodified equations. The error between the model and experimentation had a mean and standard deviation of 4.4 and +/− 0.53 degrees.
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King, T. T., G. Kletetschka, M. A. Jah, et al. "CRYOGENIC CHARACTERIZATION AND TESTING OF MAGNETICALLY-ACTUATED MICROSHUTTER ARRAYS FOR THE JAMES WEBB SPACE TELESCOPE." In 2004 Solid-State, Actuators, and Microsystems Workshop. Transducer Research Foundation, Inc., 2004. http://dx.doi.org/10.31438/trf.hh2004.3.

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Tang, Qingtao, Tao Dai, Li Niu, Yisen Wang, Shu-Tao Xia, and Jianfei Cai. "Robust Survey Aggregation with Student-t Distribution and Sparse Representation." In Twenty-Sixth International Joint Conference on Artificial Intelligence. International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/394.

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Most existing survey aggregation methods assume that the sample data follow Gaussian distribution. However, these methods are sensitive to outliers, due to the thin-tailed property of the Gaussian distribution. To address this issue, we propose a robust survey aggregation method based on Student-t distribution and sparse representation. Specifically, we assume that the samples follow Student-$t$ distribution, instead of the common Gaussian distribution. Due to the Student-t distribution, our method is robust to outliers, which can be explained from both Bayesian point of view and non-Bayesian point of view. In addition, inspired by James-Stain estimator (JS) and Compressive Averaging (CAvg), we propose to sparsely represent the global mean vector by an adaptive basis comprising both data-specific basis and combined generic bases. Theoretically, we prove that JS and CAvg are special cases of our method. Extensive experiments demonstrate that our proposed method achieves significant improvement over the state-of-the-art methods on both synthetic and real datasets.
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McCarthy, Sean, Audrey Barnes, Keith S. Holland, Erica Lewis, Patrice Ludwig, and Nick Swayne. "Making It: Institutionalizing Collaborative Innovation in Public Higher Education." In Fourth International Conference on Higher Education Advances. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/head18.2018.8247.

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This descriptive case study provides a broad overview of JMU X-Labs, an academic maker space (in other words, a teaching lab with fabrication and digital production technologies) that hosts team-taught, project-driven multidisciplinary courses. The JMU X-Labs serves the students and faculty of James Madison University[MSR-m1] , a mid-sized, public, and undergraduate-focused university in the United States. The narrative proceeds from two different but overlapping points of view: how courses at JMU X-Labs are designed and taught; and how administration of JMU X-Labs supports them. The authors refer to specific courses, pedagogical methods, and problem-solving strategies to illustrate the narrative, and they argue throughout that pedagogy and administration are indelibly intertwined in how the organization operates. Gesturing to the broad applicability and transferability of the JMU X-Labs model, the authors mark some of areas of further research that would benefit a more robust understanding of how the organization operates and grows. Finally, the authors speculate how the dynamics of this young and growing organization may answer some core and difficult questions pertaining to innovation in higher education.[MSR-m1]James Madison University (JMU) Clearlyl referenced in abstract and opening paragraph below to explain institutional context as per reviewer request.
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Mick, T., K. Means, J. Etherton, J. Powers, and E. A. McKenzie. "Design Recommendations for Controlling the Jam-Clearing Hazard on Recycling Industry Balers." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79699.

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Between 1986 and 2002, there were 43 fatalities in the United States to operators of recycling industry balers. Of these fatalities, 29 involved horizontal balers that were baling paper and cardboard (Taylor, 2002). Balers often become jammed while the baling process is occurring, and the only way to remove the jam is manually. This requires an employee to place a limb of their body into the jamming area and remove the material that is causing the jam. While lockout and tagout procedures reduce the risk of hazardous energy being released, they can still be easily bypassed, ignored, or forgotten. Recent efforts to reduce machine-related injury and death involve the development of a control system for these machines that automatically detects hazardous operating conditions and responds accordingly. The system is being developed at the National Institute for Occupational Safety and Health (NIOSH). This system, JamAlert, automatically terminates the power to the machine when a jam is detected. JamAlert detects a jam by observing both the strain that is experienced by the shear bar of the baler and the hydraulic pressure at which the ram is operating. The strain that is experienced by the baler shear bar when a jam is initiated was calculated in this study through laboratory testing and finite element modeling. Design recommendations are presented on how best to tune the JamAlert’s operating program to most effectively control the jam-clearing hazard.
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Kiefer, Björn, Karsten Buckmann, Thorsten Bartel, and Andreas Menzel. "Modeling of Single Crystal Magnetostriction Based on Numerical Energy Relaxation Techniques." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7436.

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This paper presents an energy relaxation-based approach for the modeling of single crystalline magnetic shape memory alloy response under general two-dimensional magneto-mechanical loading. It relies on concepts of energy relaxation in the context of non-convex free energy landscapes whose wells define preferred states of straining and magnetization. The constrained theory of magnetoelasticity developed by DeSimone and James [1] forms the basis for the model development. The key features that characterize the extended approach are (i) dissipative effects, accounted for in an incremental variational setting, and (ii) finite magnetocrystalline anisotropy energy. In this manner, important additional response features, e.g. the hysteretic nature, the linear magnetization response in the pre-variant reorientation regime, and the stress dependence of the maximum field induced strain, can be captured, which are prohibited by the inherent assumptions of the constrained theory. The enhanced modeling capabilities of the extended approach are demonstrated by several representative response simulations and comparison to experimental results taken from literature. These examples particularly focus on the response of single crystals under cyclic magnetic field loading at constant stress, and cyclic mechanical loading at constant magnetic field.
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Reports on the topic "Static jammer"

1

State Savings Bank of Tasmania - Burnie - Pass Books - No. 1275 Matthews, James Robert - 1905. Reserve Bank of Australia, 2021. http://dx.doi.org/10.47688/rba_archives_2006/20665.

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State Savings Bank of Tasmania - Burnie - Declarations by Depositors on making First Deposit - Matthews, James Robert - No. 1275 - 1905. Reserve Bank of Australia, 2021. http://dx.doi.org/10.47688/rba_archives_2006/20652.

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