Gotowe bibliografie tematyczne / Directivity

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  1. Artykuły w czasopismach
  2. Rozprawy doktorskie
  3. Książki
  4. Części książek
  5. Streszczenia konferencji
  6. Raporty organizacyjne

Gotowa bibliografia na temat „Directivity”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

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Artykuły w czasopismach na temat "Directivity"

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Nakazawa, Toshiyasu, and Naoaki Shinohara. "Study on aircraft noise directivity of behind the start of takeoff roll." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 3 (2021): 3202–8. http://dx.doi.org/10.3397/in-2021-2330.

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This paper discusses aircraft noise directivity behind the start of takeoff roll. Aircraft noise has the radiation directivity because of aircraft engine mount position and the engine noise directivity. Thus, lateral noise directivity correction is recommended in airport noise calculation guidelines such as ECAC Doc.29 and ICAO Doc9911. In these guidelines, the directivity of flyover noise and the directivity at the start of takeoff roll on ground are prepared separately. A 90-degree dipole model is used for the directivity of the flyover noise, and another similar directivity is used for the
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Sun, Xiaofang, Shisong Zhang, and Zhongshan Yao. "Directivity of spherical acoustic scattering based on COMSOL." Journal of Physics: Conference Series 2458, no. 1 (2023): 012030. http://dx.doi.org/10.1088/1742-6596/2458/1/012030.

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Abstract The acoustic scattering characteristics of spheres are the basis for studying the sound scattering law of the target. The directivity of acoustic scattering is one of the most important characteristics of the target sound scattering law. In this paper, the acoustic scattering characteristics of rigid spheres and elastic spherical shells are analyzed from the two typical basic models of the rigid sphere and elastic spherical shell. The sound scattering directivity corresponding to different ka values under different models is analyzed by COMSOL finite element simulation analysis. The c
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Trine, Allison, Margaret Miller, Emily Buss, G. Christopher Stecker, and Brian B. Monson. "Speech directivity patterns generated from a high-fidelity speech corpus." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A292. http://dx.doi.org/10.1121/10.0018894.

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Human talkers are directional sound sources—a phenomenon that has consequences for speech perception in multi-talker environments. Directivity patterns for speech showing frequency- and angle-dependent radiation reveal that speech generally becomes more directional toward the front of the talker as frequency increases. Differences in physical attributes can lead to individual variability in directivity patterns across talkers. Here, we examine individual variability in speech directivity using frequency-dependentdirectivity indices and directivity maps. Speech directivity was examined in the h
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Zhao, Guozhu, Kaibo Shi, and Shouming Zhong. "Research on Array Structures of Acoustic Directional Transducer." Mathematical Problems in Engineering 2021 (January 2, 2021): 1–5. http://dx.doi.org/10.1155/2021/6670277.

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This paper focuses on the directivity design of array structures of acoustic directional transducers. Based on Huygens principles, the directivity formula of transducer arrays under random distribution in xyz space is derived when the circular piston transducers are used as the array element, which is used to analyze the directivity and acoustic pressure of conical transducer arrangements. In addition, a practical approach to analyze the directivity and acoustic pressure of transducer arrays under random arrangements is proposed. Findings. The conical transducer arrays show side lobes at highe
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Musset, S., M. Maksimovic, E. Kontar, et al. "Simulations of radio-wave anisotropic scattering to interpret type III radio burst data from Solar Orbiter, Parker Solar Probe, STEREO, and Wind." Astronomy & Astrophysics 656 (December 2021): A34. http://dx.doi.org/10.1051/0004-6361/202140998.

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Aims. We use multi-spacecraft observations of individual type III radio bursts to calculate the directivity of the radio emission. We compare these data to the results of ray-tracing simulations of the radio-wave propagation and probe the plasma properties of the inner heliosphere. Methods. We used ray-tracing simulations of radio-wave propagation with anisotropic scattering on density inhomogeneities to study the directivity of radio emissions. Simultaneous observations of type III radio bursts by four widely separated spacecraft were used to calculate the directivity and position of the radi
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O'Donoghue, Jennifer L., and Karen R. Strobel. "Directivity and Freedom." American Behavioral Scientist 51, no. 3 (2007): 465–85. http://dx.doi.org/10.1177/0002764207306071.

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Dittberner, Andrew B. "Quantifying microphone directivity." Hearing Journal 56, no. 11 (2003): 22. http://dx.doi.org/10.1097/01.hj.0000292901.09293.7b.

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Jers, Harald. "Directivity of singers." Journal of the Acoustical Society of America 118, no. 3 (2005): 2008. http://dx.doi.org/10.1121/1.4785700.

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Johnston, James David. "Perceptual speaker directivity." Journal of the Acoustical Society of America 120, no. 4 (2006): 1763. http://dx.doi.org/10.1121/1.2372346.

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Yatabe, Kohei. "Modeling source directivity by solving inverse problems." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 2 (2023): 6088–91. http://dx.doi.org/10.3397/in_2023_0894.

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Directivity is an important property of a sound source in the real world. Howerver, majority of the wave-based acoustic simulation does not reflect directivity of a source. One of the reasons is that modeling of source directivity is not a simple task and remains a matter of research. In this talk, our attempts of modeling source directivity in time or frequency domains are briefly introduced.
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Rozprawy doktorskie na temat "Directivity"

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Basta, Nina Popovic. "Multilayer scalable coupler with high directivity." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53955.

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This thesis addresses the design, analysis, and experimental validation of a high-directivity and high coupling microwave directional coupler. The motivating application is in broadband signal routing between cores of multi-core processors, where the delay of simple wire interconnects introduces unacceptable latency. The performance goals include scalability with frequency, a coupling coefficient of 3 dB, directivity larger than 40 dB, high return loss, low insertion loss below 3 dB at the center frequency, and small footprint. The approach to this problem taken in the thesis is a combination
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Loveridge, M. M. "Marine seismic source signatures : directivity and the ghost." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355760.

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Ivars, Morón Diego. "Optimizing the directivity index of a two-way loudspeaker." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11108.

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Performance of the loudspeaker in a common living room is analyzed in this project. Moreover, directivity parameters like Directivity Index and polar Directivity Diagram are studied taking as example one specific tweeter construction. Some writers suggest that largely frequency-independent Directivity Index is preferable for loudspeakers in an ordinary indoor stereo setup. To achieve this goal, variation of the original radiation diagram of the studied tweeter is performed including reflectors in the system. A measurement protocol is designed and used. Obtained data is processed by developed s
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Foltz, Eleanor R. (Eleanor Ruth). "Two dimensional control of metamaterial parameters for radiation directivity." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37199.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.<br>Includes bibliographical references (leaves 77-80).<br>This work examines the feasibility of using metamaterials to direct radiation. The limits of required index of refraction and the required material depth are explored using MATLAB simulations. A wedge of connected S-shape metamaterial is chosen and simulated in CST Microwave Studio. The incident radiation is Transverse Magnetic (TM) and negative deflection is achieved. The S-shape wedge is adjusted in small ways, and a sp
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Sviridova, T. V. "The development to ecological directivity of the operation enterprise." Thesis, Вид-во СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/13191.

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Wang, Zhiwei, and Shen Zhang. "Design of 5G antenna arrays based on Multi-directivity." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-95135.

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As communication technology evolves, the focus shifts to 5G. The discussion of 5G cannot be separated from a discussion of related antenna systems. Chapter 1 is a brief introduction to our work, which is an antenna array for a 5G communication system operating in the band 3.4 to 3.8 GHz. This is a common band for 5G in Europe. Background and theory are presented in Chapters 2 and 3. In Chapter 4, the design has been simulated with the software CST Studio Suite. We study an antenna group that consists of four linear arrays that together cover all directions. The gain eventually reaches 12dB in
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Juyal, Prateek. "Directive microstrip disc radiators based on TM1m modes." IEEE TAP, 2016. http://hdl.handle.net/1993/32074.

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Fundamental TM11 mode of circular microstrip antennas has a limitation of low broadside gain. This thesis explores and investigates the possibility of designing high gain circular microstrip antennas by using higher zeros of the first order mode, or the TM1m modes. Deficiencies in the existing methods of gain enhancement, motivates the need to look for new methods. This is done by first investigating the radiation characteristics of TM1m modes, and then providing techniques for sidelobe suppression in their radiation patterns. Several approaches are proposed and corresponding to each developed
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Larsson, Kristina. "Assessment of directivity of real noise sources- Application to vehicles." Thesis, KTH, Farkost och flyg, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-151025.

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The aim of this project is to evaluate a new method for noise directivity measurements; whether a room correction factor can be used to compensate for the effect of a light reverberation field. Another aim is to find if there is any suitable standard to use. No standard to use fully was found, but SS-EN ISO 3744:2010 has a method to compensate for reverberation upon which the present method is based. Measurements were performed for three objects in a semi anechoic room and two ordinary rooms. Sound pressure was measured for all multiples of 30° in the horizontal plane where the acoustic centre
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Friman, Manne. "Directivity of sound from wind turbines : A study on the horizontal sound radiation pattern from a wind turbine." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-48926.

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In the present paper, a study on the directivity of sound from a wind turbine has been conducted. The aim of the study is to investigate the horizontal sound radiation pattern through a field study compared to a noise prediction. The benefit of the results may be used to optimize the output effect from the wind turbine while the guidelines for noise levels at nearby residential areas still are met. The complete directivity pattern around the wind turbine was investigated by performing emission measurements around the wind turbine from a method described in IEC 61400-11 Wind turbine generator s
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Bonvalot, Eliot. "Dynamic response of bridges to near-fault, forward directivity ground motions." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Summer2006/e%5Fbonvalot%5F072606.pdf.

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Książki na temat "Directivity"

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Schomer, Paul. Acoustic directivity patterns for Army weapons. US Army Corps of Engineers, Construction Engineering Research Laboratory, 1985.

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Schomer, Paul. Acoustic directivity patterns for Army weapons. US Army Corps of Engineers, Construction Engineering Research Laboratory, 1986.

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Svilainis, Linas. LED video display pixel intensity and directivity investigation: Monograph. Technologija, 2009.

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Svilainis, Linas. LED video display pixel intensity and directivity investigation: Monograph. Technologija, 2009.

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Martin, R. M. Wake geometry effects on rotor blade-vortex interaction noise directivity. Langley Research Center, 1990.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Division. and United States. Army Aviation Systems Command., eds. Measurement resolution of noise directivity patterns from acoustic flight tests. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Grimm, Simon. Directivity Based Multichannel Audio Signal Processing For Microphones in Noisy Acoustic Environments. Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-25152-9.

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L, Gentry Carl, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Directivity and trends of noise generated by a propeller in a wake. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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United States. National Aeronautics and Space Administration., ed. A search for energetic ion directivity in large solar flares: Final technical report. National Aeronautics and Space Administration, 1993.

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Petrosian, Vahe. Directivity of bremsstrahlung radiation from relativistic beams and the gamma-rays from solar flares. Center for Space Science and Astrophysics, Stanford University, 1985.

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Części książek na temat "Directivity"

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Weik, Martin H. "directivity pattern." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_5158.

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Lunlai, Wan, and Liu Xiaojing. "Freight Directivity." In Dictionary of Contemporary Chinese Economics. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-4036-9_1002.

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Eargle, John M. "Relationship Between Directivity Factor and Directivity Index." In Electroacoustical Reference Data. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2027-6_30.

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Ward, Darren B., Rodney A. Kennedy, and Robert C. Williamson. "Constant Directivity Beamforming." In Digital Signal Processing. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04619-7_1.

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Lunlai, Wan, and Liu Xiaojing. "Labor Cost Directivity." In Dictionary of Contemporary Chinese Economics. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-4036-9_1003.

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Parkes, Gregg, and Les Hatton. "Source Arrays and Directivity." In The Marine Seismic Source. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-017-3385-4_2.

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Bag, Ankan, Martin Neugebauer, Pawel Woźniak, Gerd Leuchs, and Peter Banzer. "Directivity Based Nanoscopic Position Sensing." In NATO Science for Peace and Security Series B: Physics and Biophysics. Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-0850-8_44.

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Greening, Michael V., Pierre Zakarauskas, and Ronald I. Verrall. "Vertical Directivity Measurements of Ice Cracking." In Natural Physical Sources of Underwater Sound. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1626-8_41.

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Piotto, Massimo, Federico Butti, and Paolo Bruschi. "Acoustic Velocity Sensors with Programmable Directivity." In Lecture Notes in Electrical Engineering. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-3860-1_48.

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Eargle, John M. "Directivity Versus Horizontal and Vertical Beamwidth." In Electroacoustical Reference Data. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2027-6_60.

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Streszczenia konferencji na temat "Directivity"

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Luo, Yuancheng. "Constant Directivity Loudspeaker Beamforming." In 2024 32nd European Signal Processing Conference (EUSIPCO). IEEE, 2024. http://dx.doi.org/10.23919/eusipco63174.2024.10715159.

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Gaponenko, Roman V., and Alexey A. Shcherbakov. "Maximum Directivity of Spheroidal Dielectric Antennas." In 2024 IEEE 3rd International Conference on Problems of Informatics, Electronics and Radio Engineering (PIERE). IEEE, 2024. https://doi.org/10.1109/piere62470.2024.10804937.

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Kojima, Nakato, and Nobuyoshi Kikuma. "Directivity and Mutual Coupling of Array Antenna." In 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI). IEEE, 2024. http://dx.doi.org/10.1109/ap-s/inc-usnc-ursi52054.2024.10686359.

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Tian, Xi, Wenlong Bai, and Tianyiyi He. "A symmetric directivity coupler With broad band and improved directivit." In 2015 16th International Conference on Electronic Packaging Technology (ICEPT). IEEE, 2015. http://dx.doi.org/10.1109/icept.2015.7236849.

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Levin, Boris. "Directivity of thin antennas." In 2016 XXIst International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED). IEEE, 2016. http://dx.doi.org/10.1109/diped.2016.7772224.

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Golaszewski, Arkadiusz, and Adam Abramowicz. "Miniature high directivity couplers." In 2018 22nd International Microwave and Radar Conference (MIKON). IEEE, 2018. http://dx.doi.org/10.23919/mikon.2018.8405198.

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Golaszewski, Arkadiusz, and Adam Abramowicz. "High directivity microstrip couplers." In 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON). IEEE, 2016. http://dx.doi.org/10.1109/mikon.2016.7491959.

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Zhao, Guozhu. "Directivity of Transducer Array." In 2nd International Conference on Intelligent Manufacturing and Materials. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0007532704060410.

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Nix, John, and Richard C. Lind. "Directivity Functions during Aircraft Maneuvering." In AIAA Scitech 2020 Forum. American Institute of Aeronautics and Astronautics, 2020. http://dx.doi.org/10.2514/6.2020-0754.

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Leeman, Sidney, Andrew J. Healey, Eduardo T. Costa, Hayram Nicacio, Ricardo G. Dantas, and Joaquim M. Maia. "Measurement of transducer directivity function." In Medical Imaging 2001, edited by Michael F. Insana and K. Kirk Shung. SPIE, 2001. http://dx.doi.org/10.1117/12.428234.

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Raporty organizacyjne na temat "Directivity"

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Donahue, Jennifer, Jonathan Stewart, Nicolas Gregor, and Yousef Bozorgnia. Ground-Motion Directivity Modeling for Seismic Hazard Applications. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2019. http://dx.doi.org/10.55461/gphh9609.

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We reviewed five models for modifying the natural log mean and within-event standard deviation of ground-motion models (GMMs) to account for directivity effects in the near-fault environment. We found broad consistency for strike–slip ruptures, with positive and negative directivity effects for cases of rupture towards and away from a site of interest, respectively. We found substantial divergence among directivity models for reverse slip, with some providing maximum directivity for sites positioned to experience the peak alignment of rupture direction with the fault-slip direction (this occur
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Cotton, Michael, Robert Achatz, Yeh Lo, and Christopher Holloway. Indoor Polarization and Directivity Measurements at 5.8 GHz. Institute for Telecommunication Sciences, 1999. https://doi.org/10.70220/k6xrtlcd.

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Watson-Lamprey, Jennie. Capturing Directivity Effects in the Mean and Aleatory Variability of the NGA-West2 Ground-Motion Prediction Equations. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2018. http://dx.doi.org/10.55461/usop6050.

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We expect there to be locations around a rupture that experience both positive and negative directivity effects more than others. The concept was to develop a simple model of additional mean and standard deviation to add to existing published ground motion prediction equations to account for this. The directivity effect predicted by Chiou and Youngs [2014] using the directivity parameter DPP [Spudich et al. 2013] was selected as the basis for the model. A suite of rupture geometries for strike-slip and reverse ruptures was generated and the mean and standard deviation of the change in the 5% d
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MacFarlane, Eric R., and Richard C. Lee. Los Alamos Seismic Rupture Directivity Study of PF-4. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1072251.

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Warne, Larry, Luis San Martin, Alden Pack, and William Langston. Deep Slot Transmission Cross Sections & Aperture Directivity Gain. Office of Scientific and Technical Information (OSTI), 2025. https://doi.org/10.2172/2530809.

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Nuttall, Albert H., and Benjamin A. Cray. Approximations to Directivity for Linear, Planar, and Volumetric Apertures and Arrays. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada330212.

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Hull, Andrew J. User Manual for the Generic Directivity Index (GenDI) Program (Version 1.0.5). Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada390344.

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Schomer, Paul D. Acoustic Directivity Patterns for Army Weapons. Supplement 4. The Multiple Launch Rocket System. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada166490.

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Kodres, C. A., and T. W. Lancey. TCNOISE: A Computer Program to Calculate Noise Levels and Directivity from a Jet Engine Test Cell. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada336321.

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Hart, Carl R., and Gregory W. Lyons. A Measurement System for the Study of Nonlinear Propagation Through Arrays of Scatterers. Engineer Research and Development Center (U.S.), 2020. http://dx.doi.org/10.21079/11681/38621.

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Various experimental challenges exist in measuring the spatial and temporal field of a nonlinear acoustic pulse propagating through an array of scatterers. Probe interference and undesirable high-frequency response plague typical approaches with acoustic microphones, which are also limited to resolving the pressure field at a single position. Measurements made with optical methods do not have such drawbacks, and schlieren measurements are particularly well suited to measuring both the spatial and temporal evolution of nonlinear pulse propagation in an array of scatterers. Herein, a measurement
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Artykuły w czasopismach Rozprawy doktorskie Książki
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Do bibliografii