Relevant bibliographies by topics / Frequency coded

Academic literature on the topic 'Frequency coded'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Frequency coded"

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Padovani, R., and J. Wolf. "Coded Phase/Frequency Modulation." IEEE Transactions on Communications 34, no. 5 (May 1986): 446–53. http://dx.doi.org/10.1109/tcom.1986.1096564.

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Tsow, Francis, Erica S. Forzani, and N. J. Tao. "Frequency-Coded Chemical Sensors." Analytical Chemistry 80, no. 3 (February 2008): 606–11. http://dx.doi.org/10.1021/ac7016162.

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Esli, C., B. Ozgul, and H. Delic. "Space-frequency coded HIPERLAN/2." IEEE Transactions on Consumer Electronics 50, no. 4 (November 2004): 1162–68. http://dx.doi.org/10.1109/tce.2004.1362514.

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Bloch, Matthieu, Steven W. McLaughlin, Jean-Marc Merolla, and Frédéric Patois. "Frequency-coded quantum key distribution." Optics Letters 32, no. 3 (January 12, 2007): 301. http://dx.doi.org/10.1364/ol.32.000301.

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Yang, R. H. H., and D. P. Taylor. "Trellis-coded continuous-phase frequency-shift keying with ring convolutional codes." IEEE Transactions on Information Theory 40, no. 4 (July 1994): 1057–67. http://dx.doi.org/10.1109/18.335968.

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Johnson, Mark. "Optical-actuator frequency-coded pressure sensor." Optics Letters 11, no. 9 (September 1, 1986): 587. http://dx.doi.org/10.1364/ol.11.000587.

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Tujkovic, D., M. Juntti, and M. Latva-Aho. "Space-frequency-time turbo coded modulation." IEEE Communications Letters 5, no. 12 (December 2001): 480–82. http://dx.doi.org/10.1109/4234.974492.

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Singh, S. P., and K. Subba Rao. "Discrete frequency-coded radar signal design." IET Signal Processing 3, no. 1 (2009): 7. http://dx.doi.org/10.1049/iet-spr:20080047.

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Borgmann, M., and H. Bolcskei. "Noncoherent space-frequency coded MIMO-OFDM." IEEE Journal on Selected Areas in Communications 23, no. 9 (September 2005): 1799–810. http://dx.doi.org/10.1109/jsac.2005.853800.

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Lewandowski, Marcin, and Andrzej Nowicki. "Digital High Frequency Coded Imaging System." Journal of the Acoustical Society of America 123, no. 5 (May 2008): 3337. http://dx.doi.org/10.1121/1.2933869.

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Dissertations / Theses on the topic "Frequency coded"

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Ilunga, Lou. "Adaptive, Turbo-coded OFDM." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34578.

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Wireless technologies, such as satellite, cellular, and wireless internet are now commercially driven by ever more demanding consumers, who are ready for seamless integration of communication networks from the home to the car, and into the office. There is a growing need to quickly transmit information wirelessly and accurately. Engineers have already combine techniques such as orthogonal frequency division multiplexing (OFDM) suitable for high data rate transmission with forward error correction (FEC) methods over wireless channels.

In this thesis, we enhance the system throughput of a working OFDM system by adding turbo coding and adaptive modulation (AD). Simulation is done over a time varying, frequency selective Rayleigh fading channel. The temporal variations in the simulated wireless channel are due to the presence of Doppler, a sign of relative motion between transmitter and receiver. The wideband system has 48 data sub-channels, each is individually modulated according to channel state information acquired during the previous burst. The end goal is to increase the system throughput while maintaining system performance under a bit error rate (BER) of 10-2. The results we obtained are preliminary. The lack of resources prevented us from producing detailed graphs of our findings.
Master of Science

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Gallagher, Daniel. "ULTRA-WIDEBAND ORTHOGONAL FREQUENCY CODED SAW CORRELATORS." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3950.

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Ultra–wideband (UWB) communication new technology with ability to share the FCC allocated frequency spectrum, large channel capacity and data rate, simple transceiver architecture and high performance in noisy environments. Such communication advantages have paved the way for emerging wireless technologies such as wireless high definition video streaming, wireless sensor networks and more. This thesis examines orthogonal frequency coded surface acoustic wave (SAW) correlators for use in advanced UWB communication systems. Orthogonal frequency coding (OFC) and pseudo-noise (PN) coding provides a means for UWB spreading of data. The use of OFC spectrally spreads a PN sequence beyond that of CDMA because of the increased bandwidth; allowing for improved correlation gain. The transceiver approach is still very similar to that of the CDMA approach but provides greater code diversity. Use of SAW correlators eliminates many of the costly components that are needed in the IF block in the transmitter and receiver, and reduces much of the signal processing requirements. The OFC SAW correlator device consists of a dispersive OFC transducer and a wideband output transducer. The dispersive filter was designed using seven contiguous chip frequencies within the transducer. Each chip is weighted in the transducer to account for the varying conductance of the chips and to compensate for the output transducer apodization. Experimental correlator results of an OFC SAW correlation filter are presented. The dispersive filter is designed using seven contiguous chip frequencies within the transducer. SAW correlators with fractional bandwidth of approximately 29% were fabricated on lithium niobate (LiNbO3) having a center frequency of 250 MHz and the filter has a processing gain of 49. A coupling of modes (COM) model is used to predict the experimental SAW filter response. Discussion of the filter design, analysis and measurements are presented. Results are shown for operation in a matched filter correlator for use in an UWB communication system and compared to predictions.
M.S.E.E.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering MSEE
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Wilson, William. "Multifunctional Orthogonally-Frequency-Coded Saw Strain Sensor." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3157.

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A multifunctional strain sensor based on Surface Acoustic Wave (SAW) Orthogonal Frequency Coding (OFC) technology on a Langasite substrate has been investigated. Second order transmission matrix models have been developed and verified. A new parameterizable library of SAW components was created to automate the layout process. Using these new tools, a SAW strain sensor with OFC reflectors was designed, fabricated and tested. The Langasite coefficients of velocity for strain (γS = 1.699) and Temperature (γT = 2.562) were experimentally determined. The strain and temperature characterization of this strain sensor, along with the coefficients of velocity, have been used to demonstrate both the ability to sense strain and the capability for temperature compensation. The temperature-compensated SAW OFC strain sensor has been used to detect anomalous strain conditions that are indicators of fastener failures during structural health monitoring of aircraft panels with and without noise on a NASA fastener failure test stand. The changes in strain that are associated with single fastener failures were measured up to a distance of 80 cm between the sensor and the removed fastener. The SAW OFC strain sensor was demonstrated to act as an impact sensor with and without noise on the fastener failure test stand. The average measured signal to noise ratio (SNR) of 50, is comparable to the 29.1 SNR of an acoustic emission sensor. The simultaneous use of a high pass filter for impact detection, while a low pass filter is used for strain or fastener failure, demonstrates the multifunctional capabilities of the SAW OFC sensor to act as both as a fastener failure detector and as an impact detector.
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Rice, Michael, and Kenneth Welling. "CODED OFDM FOR AERONAUTICAL TELEMETRY." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606496.

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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California
Three Quadrature Phase Shift Keying (QPSK) mapped COFDM systems demonstrating a continuum of complexity levels are simulated over an evolving three ray model of the multipath fading channel with parameters interpolated from actual channel sounding experiments. The first COFDM system uses coherent QPSK and convolutional coding with interleaving in frequency, channel equalization and soft decision decoding; the second uses convolutional coding with interleaving in frequency, Differential Phase Shift Keying (DPSK) and soft decision decoding; the third system uses a quaternary BCH code with DPSK mapping and Error and Erasure Decoding (EED). All three systems are shown to be able to provide reliable data communication during frequency selective fade events. Simulations demonstrate QPSK mapped COFDM with reasonable complexity performs well in a multipath frequency selective fading environment under parameters typically encountered in aeronautical telemetry.
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Rende, Deniz. "Bit-interleaved space-frequency coded modulation for orthogonal frequency-division multiplexing systems." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006420.

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XAVIER, GUILHERME BARRETO. "MODULATION SCHEMES FOR FREQUENCY CODED QUANTUM KEY DISTRIBUTION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6483@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
A criptografia quântica foi proposta como uma solução para o problema da distribuição de chaves criptográficas com segurança total garantida pelos princípios da mecânica quântica. Através dessa técnica é possível saber se um espião tentou interceptar a transmissão, o que é impossível utilizando técnicas de transmissão clássicas. Nesse trabalho foi feito um breve resumo da teoria de criptografia quântica, de suas técnicas de transmissão e dos problemas tecnológicos enfrentados. Foi analisada em detalhes a técnica de transmissão de qubits utilizando codificação de freqüência e feita uma comparação dos diferentes esquemas de modulação frente aos protocolos BB84 e B92. Foi demonstrado que os dois esquemas de modulação existentes (AM-AM e PM-PM) são na realidade equivalentes e foi proposto um novo esquema, o AM-PM o único que suporta o protocolo BB84 clássico. Medidas foram realizadas classicamente nos formatos AM-AM e AM-PM.
Quantum cryptography has been proposed as a solution to the cryptographic key distribution problem with absolute security guaranteed by the principles of quantum mechanics. Through this scheme it is possible to find out whether a spy tried to eavesdrop on the transmission, which was impossible to discover using classical transmission techniques. In this work a brief review of quantum cryptography theory, transmission techniques and technological problems involved were performed. It was analyzed in detail the transmission technique employing frequency coding, and a comparison was made between the different modulation schemes and the BB84 and B92 protocols. It was demonstrated that the two existing modulation formats (AM-AM and PM-PM) are in fact equivalent and a new format (AM-PM) was proposed, the only one able to accommodate classical BB84. Classical measurements were performed on the AM-AM and AMPM formats.
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Lee, King F. "Space-time and space-frequency coded orthogonal frequency division multiplexing transmitter diversity techniques." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/14981.

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Pham, Tri. "Soft Detection of Trellis Coded CPM in Frequency-SelectiveChannels." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2012. http://hdl.handle.net/10092/7178.

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Non-linear continuous phase modulation has constant envelope and spectral efficiency, which are desirable for public safety communication systems where both bandwidth and power are limited. A practical design of an innovation based receiver for partial response CPM was recently developed for public safety applications. It is in the form of a linear predictive demodulator with a coefficient look up table. The demodulator shows great performance over multipath fading channels without channel equalization and promises a significant contribution to public safety communication. The work in this thesis is focussed on developing and analyzing modern techniques to improve the receiver performance while maintaining a feasible implementation complexity. Suitable soft output algorithms are incorporated into the demodulator allowing a subsequent convolutional decoder to perform soft decoding. By modifying the design criteria of the predictive demodulator and introducing a feedback loop, an iterative detection scheme is formed for the concatenated structure of demodulator, deinterleaver and decoder. Spatial diversity combining techniques are summarized and a very low complexity combining scheme is developed. It selects the best received sample sequence by considering the average energy of each sequence. In addition, the demodulator is extended to have dual coefficient look up tables supporting its detection by having parallel prediction processes and combining their results. This leads to an improvement in overall demodulator performance. A theoretical proof that only half the number of coefficients need to be stored in memory is also given. Matlab simulations on a Rayleigh fast fading multipath channel have shown that the proposed techniques significantly improve the overall detection accuracy. Each of them provides a good gain in signal to noise ratio or delay spread and when combined, a significant performance gain is achieved.
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Rattray, George G. K. "Joint diversity trellis-coded modulation for frequency selective environments." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366060.

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Belezinis, P. "The performance of time-frequency coded spread-spectrum systems." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37943.

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Books on the topic "Frequency coded"

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Roderick, David V. A coded orthogonal frequency division multiplexing simulation of a high data rate, line-of-sight, digital radio for mobile maritime communications. Monterey, Calif: Naval Postgraduate School, 1997.

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R, Miguel A. Betancourt. Coded performance of a fast frequency-hopped noncoherent BFSK ratio statistic receiver over a Rician fading channel with partial-band interference. Monterey, Calif: Naval Postgraduate School, 1992.

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Khan, Arshad. SAP Transaction Codes: Frequently Used T-Codes. Chicago: Khan Consulting and Pub., LLC, 2010.

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Nikolakopoulos, Xenofon. Optimum codes for FFH. Monterey, Calif: Naval Postgraduate School, 1997.

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Association, American Medical, ed. Frequently asked questions about CPT coding: CPT companion 2000. Chicago, IL: American Medical Association, 1999.

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Directorate, Canada Environmental Health. Limits of exposure to radiofrequency fields at frequencies from 10 kHz--300 GHz: Safety code 6. Ottawa, Ont: Health and Welfare Canada, 1991.

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San Francisco (Calif.). Office of Labor Standards Enforcement. San Francisco Paid Sick Leave Ordinance, Administrative Code Chapter 12W: Frequently asked questions. San Francisco: Office of Labor Standards Enforcement, 2007.

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Redinbo, Robert. Fault tolerance in space-based digital signal processing and switching systems: Protecting up-link processing resources, demultiplexer, demodulator, and decoder : final report June 1990 - September 1994. [Washington, DC: National Aeronautics and Space Administration, 1994.

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1952-, Hanzo Lajos, ed. OFDM and MC-CDMA for broadband multi-user communications, WLANs, and broadcasting. [Piscataway, N.J.]: IEEE Press, 2003.

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United States. Congress. Senate. A bill to amend the Internal Revenue Code of 1986 to provide economic growth incentives in 1993, and for no other purpose. [Washington, D.C.?]: [United States Government Printing Office], 1993.

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Book chapters on the topic "Frequency coded"

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Fischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digitale Fernseh- und Hörfunktechnik in Theorie und Praxis, 417–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-53896-4_19.

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Fischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digital Video and Audio Broadcasting Technology, 399–424. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32185-7_19.

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Fischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digital Video and Audio Broadcasting Technology, 345–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11612-4_19.

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Fischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digitale Fernseh- und Hörfunktechnik in Theorie und Praxis, 361–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15047-0_19.

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Hwang, Tae Jin, Sang Soon Park, and Ho Seon Hwang. "Adaptive Space-Frequency Block Coded OFDM." In Computational Science – ICCS 2006, 944–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11758501_144.

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Škodný, Peter. "Remarks on the frequency-coded neural nets complexity." In Aspects and Prospects of Theoretical Computer Science, 244–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/3-540-53414-8_47.

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DeYong, Mark, and Chris Fields. "Silicon Neurons for Phase and Frequency Detection and Pattern Generation." In Silicon Implementation of Pulse Coded Neural Networks, 65–77. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2680-3_4.

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Sun, Siyue, Kun Wang, Guang Liang, Feng Tian, and Zaiyang Jiang. "Performance Analysis of Frequency Division Multiplex Complementary Coded CDMA Systems." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 319–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90802-1_28.

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Gong, Chao, Aijun Liu, Bangning Zhang, and Daoxing Guo. "Adaptive Rate Protocol for LDPC Coded Slow Frequency Hop System." In Lecture Notes in Electrical Engineering, 51–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25905-0_7.

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Cheng, Fangfang, Jiyu Jin, Guiyue Jin, Peng Li, and Jun Mou. "Frequency-Hopped Space-Time Coded OFDM over Time-Varying Multipath Channel." In Machine Learning and Intelligent Communications, 634–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73447-7_68.

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Conference papers on the topic "Frequency coded"

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Kozlovski, N. Y., and D. C. Malocha. "SAW noise-like coded reflector structures." In 2008 IEEE International Frequency Control Symposium. IEEE, 2008. http://dx.doi.org/10.1109/freq.2008.4623006.

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Johnson, Mark. "Frequency-Coded Optical-Actuator Pressure Sensing." In Hague International Symposium, edited by Anna M. Verga Scheggi. SPIE, 1987. http://dx.doi.org/10.1117/12.941105.

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Host, S., and G. Lindell. "On coded OFDM over frequency selective channels using woven convolutional codes." In IEEE International Symposium on Information Theory, 2003. Proceedings. IEEE, 2003. http://dx.doi.org/10.1109/isit.2003.1228050.

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Malocha, D. C., J. Pavlina, D. Gallagher, N. Kozlovski, B. Fisher, N. Saldanha, and D. Puccio. "Orthogonal frequency coded SAW sensors and RFID design principles." In 2008 IEEE International Frequency Control Symposium. IEEE, 2008. http://dx.doi.org/10.1109/freq.2008.4623004.

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Smith, M. Scott, Arthur R. Weeks, and Donald C. Malocha. "Programmable Orthogonal Frequency Coded SAW Correlator Filters." In 2018 IEEE International Ultrasonics Symposium (IUS). IEEE, 2018. http://dx.doi.org/10.1109/ultsym.2018.8580189.

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Lei, Wang, and Cha Hao. "The modulate frequency by coded pulse signal." In 2004 International Waveform Diversity & Design Conference. IEEE, 2004. http://dx.doi.org/10.1109/iwddc.2004.8317568.

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Anandan, Mukund, Saumya Choudhary, and Pradeep Kumar K. "OFDM for Frequency Coded Quantum Key Distribution." In International Conference on Fibre Optics and Photonics. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/photonics.2012.w2a.6.

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Welstead, S. "Frequency coded waveforms from chaotic time series." In IET International Conference on Radar Systems 2007. IEE, 2007. http://dx.doi.org/10.1049/cp:20070527.

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Bell, Mark, and Chieh-fu Chang. "Frequency Coded Waveforms for Adaptive Waveform Radar." In 2006 40th Annual Conference on Information Sciences and Systems. IEEE, 2006. http://dx.doi.org/10.1109/ciss.2006.286522.

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Schrenk, B. "The EML as frequency-coded optical neuron." In 45th European Conference on Optical Communication (ECOC 2019). Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/cp.2019.1061.

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Reports on the topic "Frequency coded"

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Brock, Billy. The Frequency-Coded Pulse-Burst Waveform and the Costas Sequence. Office of Scientific and Technical Information (OSTI), February 2016. http://dx.doi.org/10.2172/1603860.

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Suvorova, Sofia, Bill Moran, Elena Kalashyan, Peter Zulch, and Robert J. Hancock. Radar Performance of Temporal and Frequency Diverse Phase-Coded Waveforms. Fort Belvoir, VA: Defense Technical Information Center, January 2006. http://dx.doi.org/10.21236/ada475484.

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Geshwind, Frank, and Vladimir Rokhlin. High Frequency Electromagnetic Propagation/Scattering Codes. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada381832.

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Macdonald, Thomas G., and Michael B. Pursley. Frequency-Hop Spread-Spectrum Packet Radio with Hermitian Codes. Fort Belvoir, VA: Defense Technical Information Center, October 2000. http://dx.doi.org/10.21236/ada393087.

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Brown, Yolanda, Twonia Goyer, and Maragaret Harvey. Heart Failure 30-Day Readmission Frequency, Rates, and HF Classification. University of Tennessee Health Science Center, December 2020. http://dx.doi.org/10.21007/con.dnp.2020.0002.

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30 Day Hospital Readmission Rates, Frequencies, and Heart Failure Classification for Patients with Heart Failure Background Congestive heart failure (CHF) is the leading cause of mortality, morbidity, and disability worldwide among patients. Both the incidence and the prevalence of heart failure are age dependent and are relatively common in individuals 40 years of age and older. CHF is one of the leading causes of inpatient hospitalization readmission in the United States, with readmission rates remaining above the 20% goal within 30 days. The Center for Medicare and Medicaid Services imposes a 3% reimbursement penalty for excessive readmissions including those who are readmitted within 30 days from prior hospitalization for heart failure. Hospitals risk losing millions of dollars due to poor performance. A reduction in CHF readmission rates not only improves healthcare system expenditures, but also patients’ mortality, morbidity, and quality of life. Purpose The purpose of this DNP project is to determine the 30-day hospital readmission rates, frequencies, and heart failure classification for patients with heart failure. Specific aims include comparing computed annual re-admission rates with national average, determine the number of multiple 30-day re-admissions, provide descriptive data for demographic variables, and correlate age and heart failure classification with the number of multiple re-admissions. Methods A retrospective chart review was used to collect hospital admission and study data. The setting occurred in an urban hospital in Memphis, TN. The study was reviewed by the UTHSC Internal Review Board and deemed exempt. The electronic medical records were queried from July 1, 2019 through December 31, 2019 for heart failure ICD-10 codes beginning with the prefix 150 and a report was generated. Data was cleaned such that each patient admitted had only one heart failure ICD-10 code. The total number of heart failure admissions was computed and compared to national average. Using age ranges 40-80, the number of patients re-admitted withing 30 days was computed and descriptive and inferential statistics were computed using Microsoft Excel and R. Results A total of 3524 patients were admitted for heart failure within the six-month time frame. Of those, 297 were re-admitted within 30 days for heart failure exacerbation (8.39%). An annual estimate was computed (16.86%), well below the national average (21%). Of those re-admitted within 30 days, 50 were re-admitted on multiple occasions sequentially, ranging from 2-8 re-admissions. The median age was 60 and 60% male. Due to the skewed distribution (most re-admitted twice), nonparametric statistics were used for correlation. While graphic display of charts suggested a trend for most multiple re-admissions due to diastolic dysfunction and least number due to systolic heart failure, there was no statistically significant correlation between age and number or multiple re-admissions (Spearman rank, p = 0.6208) or number of multiple re-admissions and heart failure classification (Kruskal Wallis, p =0.2553).
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Nelson, Gena. A Systematic Review of the Quality of Reporting in Mathematics Meta-Analyses for Students with or at Risk of Disabilities Coding Protocol. Boise State University, July 2021. http://dx.doi.org/10.18122/sped138.boisestate.

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The purpose of this document is to provide readers with the coding protocol that authors used to code 22 meta-analyses focused on mathematics interventions for students with or at-risk of disabilities. The purpose of the systematic review was to evaluate reporting quality in meta-analyses focused on mathematics interventions for students with or at risk of disabilities. To identify meta-analyses for inclusion, we considered peer-reviewed literature published between 2000 and 2020; we searched five education-focused electronic databases, scanned the table of contents of six special education journals, reviewed the curriculum vitae of researchers who frequently publish meta-analyses in mathematics and special education, and scanned the reference lists of meta-analyses that met inclusion criteria. To be included in this systematic review, meta-analyses must have reported on the effectiveness of mathematics-focused interventions, provided a summary effect for a mathematics outcome variable, and included school-aged participants with or at risk of having a disability. We identified 22 meta-analyses for inclusion. We coded each meta-analysis for 53 quality indicators (QIs) across eight categories based on recommendations from Talbott et al. (2018). Overall, the meta-analyses met 61% of QIs and results indicated that meta-analyses most frequently met QIs related to providing a clear purpose (95%) and data analysis plan (77%), whereas meta-analyses typically met fewer QIs related to describing participants (39%) and explaining the abstract screening process (48%). We discuss the variation in QI scores within and across the quality categories and provide recommendations for future researchers so that reporting in meta-analyses may be enhanced. Limitations of the current study are that grey literature was not considered for inclusion and that only meta-analyses were included; this limits the generalizability of the results to other research syntheses (e.g., narrative reviews, systematic reviews) and publication types (e.g., dissertations).
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Nelson, Gena. A Systematic Review of the Quality of Reporting in Mathematics Meta-Analyses for Students with or at Risk of Disabilities Coding Protocol. Boise State University, Albertsons Library, July 2021. http://dx.doi.org/10.18122/sped.138.boisestate.

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Abstract:
The purpose of this document is to provide readers with the coding protocol that authors used to code 22 meta-analyses focused on mathematics interventions for students with or at-risk of disabilities. The purpose of the systematic review was to evaluate reporting quality in meta-analyses focused on mathematics interventions for students with or at risk of disabilities. To identify meta-analyses for inclusion, we considered peer-reviewed literature published between 2000 and 2020; we searched five education-focused electronic databases, scanned the table of contents of six special education journals, reviewed the curriculum vitae of researchers who frequently publish meta-analyses in mathematics and special education, and scanned the reference lists of meta-analyses that met inclusion criteria. To be included in this systematic review, meta-analyses must have reported on the effectiveness of mathematics-focused interventions, provided a summary effect for a mathematics outcome variable, and included school-aged participants with or at risk of having a disability. We identified 22 meta-analyses for inclusion. We coded each meta-analysis for 53 quality indicators (QIs) across eight categories based on recommendations from Talbott et al. (2018). Overall, the meta-analyses met 61% of QIs and results indicated that meta-analyses most frequently met QIs related to providing a clear purpose (95%) and data analysis plan (77%), whereas meta-analyses typically met fewer QIs related to describing participants (39%) and explaining the abstract screening process (48%). We discuss the variation in QI scores within and across the quality categories and provide recommendations for future researchers so that reporting in meta-analyses may be enhanced. Limitations of the current study are that grey literature was not considered for inclusion and that only meta-analyses were included; this limits the generalizability of the results to other research syntheses (e.g., narrative reviews, systematic reviews) and publication types (e.g., dissertations).
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Sutherland, H. J., and R. L. Linker. User`s guide for the frequency domain algorithms in the LIFE2 fatigue analysis code. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10110556.

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Heymsfield, Ernie, and Jeb Tingle. State of the practice in pavement structural design/analysis codes relevant to airfield pavement design. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40542.

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An airfield pavement structure is designed to support aircraft live loads for a specified pavement design life. Computer codes are available to assist the engineer in designing an airfield pavement structure. Pavement structural design is generally a function of five criteria: the pavement structural configuration, materials, the applied loading, ambient conditions, and how pavement failure is defined. The two typical types of pavement structures, rigid and flexible, provide load support in fundamentally different ways and develop different stress distributions at the pavement – base interface. Airfield pavement structural design is unique due to the large concentrated dynamic loads that a pavement structure endures to support aircraft movements. Aircraft live loads that accompany aircraft movements are characterized in terms of the load magnitude, load area (tire-pavement contact surface), aircraft speed, movement frequency, landing gear configuration, and wheel coverage. The typical methods used for pavement structural design can be categorized into three approaches: empirical methods, analytical (closed-form) solutions, and numerical (finite element analysis) approaches. This article examines computational approaches used for airfield pavement structural design to summarize the state-of-the-practice and to identify opportunities for future advancements. United States and non-U.S. airfield pavement structural codes are reviewed in this article considering their computational methodology and intrinsic qualities.
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Tarr, J. A., J. E. Wieselthier, and A. Ephremides. Packet-Error Probability Analysis for Unslotted FH-CDMA (Frequency Hopped-Code-Division Multiple-Access) Systems with Error Control Coding. Fort Belvoir, VA: Defense Technical Information Center, April 1989. http://dx.doi.org/10.21236/ada207964.

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