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Letteratura scientifica selezionata sul tema "EBG STRUCTURE"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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Articoli di riviste sul tema "EBG STRUCTURE"

Luo, Hui, Wei Wei Wu, Tao Xie, Le Peng Zhong e Nai Chang Yuan. "Design of a Novel EBG Structure for Antenna Arrays". Advanced Materials Research 1044-1045 (ottobre 2014): 1125–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.1125.

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EBG structures can greatly reduce mutual coupling effects between patch antennas by suppressing surface wave propagation in a specified frequency range. A two-annular rectangular slot EBG structure is proposed and its performance is analyzed. HFSS simulation results show that mutual coupling loss in a 2x2 patches system is reduced appreciably (10dB in the work frequency band 19.6~22GHz (K/Ka band)) compared with antenna without EBG structures. What’s more, the side effects on other performances, like reflection parameter and bandwidth, are so little that can be neglected. With this EBG structure loaded in antenna array, the systematic performance can also be improved.

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Ouassal, Hassna, Jafar Shaker, Langis Roy, Khelifa Hettak e Reza Chaharmir. "Line Defect-Layered EBG Waveguides in Dielectric Substrates". International Journal of Antennas and Propagation 2018 (4 giugno 2018): 1–9. http://dx.doi.org/10.1155/2018/3469730.

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A dielectric-based multilayer structure composed of U-shaped rings (ML-UR) is used to develop a class of novel electromagnetic band gap (EBG) slab waveguide. The structure has two band gaps that narrow down as dielectric constant is increased. The EBG slab waveguide is created by embedding a single-layer line defect inside the 3D crystal of the EBG slab guide. Unlike our previously published foam-based EBG structure, the use of dielectric spacer in the EBG waveguides offers significant advantages in terms of overall size, structure reliability, and design flexibility. The waveguide structures reported in this paper are designed to operate at X-band (8–12 GHz) while being fed by coplanar-slotline transitions. Prototypes were fabricated and characterized experimentally. The insertion loss decreases by decreasing the number of full lattices of ML-UR surrounding the channels. The proposed waveguide has potential in microwave components such as directional couplers, phase shifters, and antenna array feeding networks.

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Azarbar, A., e J. Ghalibafan. "A Compact Low-Permittivity Dual-Layer EBG Structure for Mutual Coupling Reduction". International Journal of Antennas and Propagation 2011 (2011): 1–6. http://dx.doi.org/10.1155/2011/237454.

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Electromagnetic bandgap (EBG) structures can help in the reduction of mutual coupling by their capabilities of suppressing surface wave's propagation in a specific frequency range. In this work, a dual-layer EBG structure, which had a lower resonant frequency than the single-layer one, is proposed in order to reduce the mutual coupling between -plane coupled microstrip antenna array. As this EBG structure significantly made the series capacitance between neighbor cells larger, a drastic reduction of the unit cell size was achieved. The simulated and experimental results show that the proposed structure has a significant 19 dB mutual coupling reduction.

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Benykhlef, F. "EBG Structures for Reduction of Mutual Coupling in Patch Antennas Arrays". Journal of Communications Software and Systems 13, n. 1 (28 marzo 2017): 9. http://dx.doi.org/10.24138/jcomss.v13i1.242.

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An important issue in antenna array design is reduction of mutual coupling. In square microstrip antennas this reduction can be achieved by using electromagnetic band-gap (EBG) structures. They can help in the reduction of mutual coupling by using their capability of suppressing surface waves propagation in a given frequency range. In this paper, we analyze the isolation properties of different EBG structures are compare them in antennas arrays by simulations. A new configuration of a planar compact electromagnetic bandgap structure is investigated. Compared to the conventional EBG (mushroom structure), a size reduction of 67.2% is achieved. Simulation results show that a significant value of mutual coupling reduction, more than 6 dB, can be obtained by using the proposed structure.

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Gao, Qiang, Fen Tan e Jun Sun. "Low RCS Antenna Based on EBG Structure". Advanced Materials Research 668 (marzo 2013): 771–75. http://dx.doi.org/10.4028/www.scientific.net/amr.668.771.

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In this paper, the application of stealth materials based on EBG structure in radar antenna system is studied. This materials is thinner and weaker, and can be well integrated with waveguide antenna. Radar cross section (RCS) is reduced effectively and stealth is realized.

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Jia, Ying, Ruo Meng Hou, Hong Ning Tian, Hou Sui Zhao e Hu Xu. "Study on the EBG Structure Absorbing Composites". Advanced Materials Research 953-954 (giugno 2014): 1012–16. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.1012.

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Two different types of carbon-based composites are made, to measure their electromagnetic parameters through experiments, which are applied to the construction of high impedance surface electromagnetic band gap absorbing structure. Then, through the application of electromagnetic simulation software HFSSv.11 the reflection coefficients of the models are measured as the electromagnetic frequency changes. The research shows that the application of carbon-based composites can improve the EBG absorbing structure, thus having such functions as heat resistance, corrosion resistance, light weight and high tensile strength. Therefore, it is feasible to apply the carbon-based composite to the EBG absorbing structure to improve its performance.

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Chiau, C. C., X. Chen e C. Parini. "Multiperiod EBG structure for wide stopband circuits". IEE Proceedings - Microwaves, Antennas and Propagation 150, n. 6 (2003): 489. http://dx.doi.org/10.1049/ip-map:20031087.

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Jun, Sung Yun, Benito Sanz Izquierdo e Edward A. Parker. "Liquid Sensor/Detector Using an EBG Structure". IEEE Transactions on Antennas and Propagation 67, n. 5 (maggio 2019): 3366–73. http://dx.doi.org/10.1109/tap.2019.2902663.

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Chen, Peng, Xiao Dong Yang, Chao Yang Chen e Yu Ning Zhao. "A NOVEL UNI-PLANAR COMPACT EBG STRUCTURE". Progress In Electromagnetics Research Letters 45 (2014): 31–34. http://dx.doi.org/10.2528/pierl14012308.

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Padhi, Shantanu K., e Marek E. Bialkowski. "A microstrip Yagi antenna using EBG structure". Radio Science 38, n. 3 (22 maggio 2003): n/a. http://dx.doi.org/10.1029/2002rs002697.

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Più fonti

Tesi sul tema "EBG STRUCTURE"

Gnanagurunathan, Gnanam. "Electromagnetic bandgap (EBG) structure based patch antennas". Thesis, University of Nottingham, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551055.

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Abstract (sommario):

Microstrip patch antenna is used extensively in wireless and mobile applications due to its low-profile and lightweight. However, this antenna is prone to low gain, limited bandwidth and increased cross polarization levels. Electromagnetic Bandgap (EBG) structures are able to enhance the performance of this type of antenna. In this work, the performance of the patch antenna when integrated with EBG structure is investigated. A preliminary simulation study on the performance of a microstrip patch antenna integrated with Electromagnetic Bandgap (EBG) structures, indicated improvement in the radiation characteristics. First, the EBG characterization effort is undertaken. The bandgap of complementary and non-complementary form of five geometries are analyzed using the transmission line method. The analysis through simulation and measurement, show that complementary form sees a significant shift in the bandgap to lower frequencies and offer wider bandgap when compared to non-complementary form. Subsequently, gain performance of a square patch antenna when it is enclosed by complementary forms of either circular or square EBG cells are investigated. It emerges that the use of complementary EBG cells results in a comparatively better gain performance. The study includes a consideration of the groundplane size and the number of rows surrounding the patch, as these could affect the gain performance. This is followed by experimental measurements to substantiate the simulation outcome. Finally, the gain performance of a wideband antenna when it is configured with an EBG structure which functions as a reflector, also known as Artificial Magnetic Conductor (AMC) is investigated and reported. Four variations of the AMC structure are investigated i.e. a square cell backed by square cells (with and without vias) and square cells backed by a PEC (with and without vias). The properties of gain, impedance bandwidth and power patterns are measured and reported over the wideband frequencies of 3-10GHz.

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Lai, Ying-Chun. "A Development of a Common-Mode FilterUsing an EBG Structure in High Speed SerialLinks". Thesis, KTH, Elektroteknisk teori och konstruktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104986.

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As signal speed increases and electronic products become progressively smaller,the risks of electromagnetic radiation and interference are also heightened.Ericsson's SCXB, an Ethernet switch card, experiences exactly this problem,with excessive emission levels probably caused by common-mode noise.In this project, a common-mode lter using the electromagnetic bandgap(EBG) structure has been designed and implemented in the SCXB. Unlikeconventional common-mode lters, the common-mode lter is embedded inthe printed circuit board (PCB) beneath the dierential lines. The eect ofthe common-mode lter is assessed by measuring the insertion loss and thepower radiation of a shielded cable connected to the common-mode lter.A compact common-mode lter using an EBG structure has been proposedin this project and this works eectively at 937.5 MHz. One of the resultsfrom the parametric analysis shows that the common-mode lter is suitableto work in a high frequency range due to the smaller structure and the widerbandwidth range. The common-mode lter is constructed with the PCBfabrication process. No additional components are necessary, although morelayers of the PCB's stack up are required in which to embed the common-mode lter.

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Choi, Jinwoo. "Noise Suppression and Isolation in Mixed-Signal Systems Using Alternating Impedance Electromagnetic Bandgap (AI-EBG) Structure". Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10417.

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With the evolution of technologies, mixed-signal system integration is becoming necessary for combining heterogeneous functions such as high-speed processors, radio frequency (RF) circuits, memory, microelectromechanical systems (MEMS), sensors, and optoelectronic devices. This kind of integration is required for convergent microsystems that support communication and computing capabilities in a tightly integrated module. A major bottleneck with such heterogeneous integration is the noise coupling between the dissimilar blocks constituting the system. The noise generated by the high-speed digital circuits can couple through the power distribution network (PDN) and this noise can transfer to sensitive RF circuits, completely destroying the functionality of noise-sensitive RF circuits. One common method used for mixed-signal integration in the package is splitting the power and/or ground planes. The gap in the power and ground planes can partially block the propagation of electromagnetic waves. However, electromagnetic energy can still couple through the split, especially at frequencies greater than 1 GHz. The AI-EBG structure in this dissertation has been developed to suppress unwanted noise coupling in mixed-signal systems and this AI- EBG structure shows excellent isolation (-80 dB ~ -140 dB), which results in a noise coupling-free environment in mixed-signal systems. The AI-EBG structure would be part of the power distribution network (PDN) in systems and is expected to have a significant impact on noise suppression and isolation in mixed-signal systems in future.

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Pítra, Kamil. "Antény pro oblasti (sub)milimetrových vln". Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233662.

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Disertační práce se zabývá návrhem a optimalizací kruhově polarizované anténa pro oblast terahertzových kmitočtů. V práci se věnuji zjednodušené teorii terahertzového zdroje a návrhu vhodné antény pro tento zdroj. Návrh je zaměřen na dosažení kruhové polarizace z lineárně polarizovaných antén. Abych potlačil šíření povrchové vlny na elektricky tlustém dielektrickém substrátu, věnuji se návrhu a optimalizaci specifických periodických struktur. Návrh těchto struktur je poměrně komplikovaný, protože neexistuje přímočarý vztah mezi vlastnostmi struktur s elektromagnetickým zádržným pásmem (EBG) a geometrií buňky. Abych vhodně koncentroval vyzařovanou energii do úzkého svazku, věnuji se návrhu a optimalizaci částečně odrazného plochy (PRS), které působí jako planární čočka pro terahertzovou anténu.

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Palreddy, Sandeep R. "Wideband Electromagnetic Band Gap (EBG) Structures, Analysis and Applications to Antennas". Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/54004.

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In broadband antenna applications, the antenna's cavity is usually loaded with absorbers to eliminate the backward radiation, but in doing so the radiation efficiency of the antenna is decreased. To enhance the radiation efficiency of the antennas EBG structures are used, but they operate over a narrow band. Uniform electromagnetic band gap (EBG) structures are usually periodic structures consisting of metal patches that are separated by small gaps and vias that connect the patches to the ground plane. The electrical equivalent circuit consists of a resonant tank circuit, whose capacitance is represented by the gap between the patches and inductance represented by the via. EBG structures are equivalent to a magnetic surface at the frequency of resonance and thus have very high surface impedance; this makes the EBG structures useful when mounting an antenna close to conducting ground plane, provided the antenna's currents are parallel to the EBG structure. Because EBG structures are known to operate over a very narrow band, they are not useful when used with a broadband antenna. Mushroom-like uniform EBG structures (that use vias) are compact in size have low loss, can be integrated into an antenna to minimize coupling effects of ground planes and increase radiation efficiency of the antenna. The bandwidth of an EBG structure is defined as the band where the reflection-phase from the structure is between +900 to -900. In this dissertation analysis of EBG structures is established using circuit analysis and transmission line analysis. Methods of increasing the bandwidth of EBG structures are explored, by cascading uniform EBG structures of different sizes progressively and vertically (stacked), and applications with different types of antennas are presented. Analyses in this dissertation are compared with previously published results and with simulated results using 3D electromagnetic tools. Validation of applications with antennas is carried by manufacturing prototypes and comparing measured performance with analysis and 3D electromagnetic simulations. The improvements in performance by using wideband progressive EBG and wideband stacked EBG structures are noted.
Ph. D.

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Venkateswaran, Ajay. "Analysis of planar EBG structures using transmission line models". Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40812.

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The transmission line based analytical solutions have simplified engineering of complex microwave circuits like electromagnetic bandgap structures (EBGs). In this thesis, planar EBG structures are studied by derivation of lumped element and transmission line equivalent circuits followed by utilizing analytical formulations. Based on this approach, a code is developed that predicts the dispersion characteristics of these periodic structures in a matter of few seconds. Planar EBG structures containing meander sections are investigated and a method for development of an equivalent circuit for the meander line portion is presented. The analysis of the studied EBG structures begins from a simple 1D geometry and is extended to more complex 2D geometries. The analytical simulation results are evaluated against full-wave simulations. Inclusion of the meander sections reduces the beginning of the bandgap to below 1GHz resulting in a more attractive structure for low frequency omni-directional filtering.
Les solutions analytiques basées sur des lignes de transmission ont simplifié l'ingénierie de circuits micro-ondes complexes, tel que les EBG. La présente thèse étudie les structures coplanaires EBG à partir d'éléments discrets et de modèles de lignes de transmission, auxquels sont ensuite appliquées des formules analytiques. Grâce à cette approche, un logiciel a été développé permettant de prédire les caractéristiques de dispersion de ces structures périodiques en quelques secondes seulement. Les structures coplanaires EBG contenant des sections courbes sont étudiées et un modèle de circuit équivalent à la portion courbe est proposé. L'analyse des structures EBG commence par une simple géométrie 1D, puis est étendue à des géométries 2D plus complexes. Le résultat des simulations analytiques est évalué par rapport au résultat des simulations analogues. Lorsque les sections courbes sont incluses, le début de la bande interdite est porté en deçà de 1GHz, rendant la structure plus intéressante pour le filtrage basse fréquence omni- directionnel.

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Li, Qian. "Miniaturized DGS and EBG structures for decoupling multiple antennas on compact wireless terminals". Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10512.

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MIMO (Multiple Input Multiple Output) technology has been presented to significantly increase the wireless channel capacity and reliability without requiring additional radio spectrum or power. In MIMO systems, multiple antennas are mounted at both the transmitter and the receiver. When this technology is employed for a compact wireless terminal, one of the most challenging tasks is to reduce the high mutual coupling between closely placed antenna array elements. The high mutual coupling produces high correlation between antenna elements and affects the channel capacity of MIMO system. The objectives of this thesis are to design practical miniaturized structures to reduce high mutual coupling for small wireless terminals. The research is conducted in the following areas. Initially, a PIFA design and two-element PIFA array are proposed and optimized to operate at 1.9GHz. A pair of two coupled quarter-wavelength linear slits is inserted in a compact ground plane, resulting in significant reduction of the mutual coupling across antenna operating frequency band. In order to take up less space on the ground plane, instead of the linear slits, miniaturized convoluted slits are implemented between the two closely placed PIFAs. Although the convoluted slits have small area and are positioned close to the edges of the ground plane, the miniaturized convoluted slit structures achieve a reduction of mutual coupling between antenna elements and succeed in reducing the effect of the human body (head and hand) to the antennas. In order to further reduce the size of the slits etched on the compact ground plane, a novel double-layer slit-patch EBG structure is proposed. It consists of a two-layer structure including conducting patches and aperture slits placed on either side of a very thin dielectric layer. They are placed in very close proximity to each other (55μm). A two-element printed CPW-fed monopole array operating around 2.46GHz and a two-element UWB planar monopole array operating from 3GHz to 6GHz have been employed to investigate the proposed slit-patch EBG structures. The optimized double-layer slit-patch EBG structure yields a significant reduction of the mutual coupling and produces the maximum miniaturization of antenna array. Another novel convoluted slit-patch EBG structure has been presented to reduce the mutual coupling between two PIFAs operating at 1.9GHz. These results demonstrate that the slit-patch EBG structure is a feasible technology to reduce the mutual coupling between multiple antennas for compact wireless terminals.

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Masuda, Tetsuya. "Studies on structure-sweetness relationship in egg white lysozyme". Kyoto University, 2006. http://hdl.handle.net/2433/144346.

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Kyoto University (京都大学)
0048
新制・論文博士
博士(農学)
乙第11784号
論農博第2590号
新制||農||923(附属図書館)
学位論文||H18||N4112(農学部図書室)
23839
UT51-2006-C706
京都大学大学院農学研究科食品工学専攻
(主査)教授北畠直文, 教授吉川正明, 教授河田照雄
学位規則第4条第2項該当

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Dornan, Ben. "EEG and the default mode : a structured investigation". Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8385/.

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The default network refers to a network of brain regions more active in the resting state than during active engagement in a task. The anatomy and functional behaviour of the network has been well established through a decade of work which has a heavy bias towards fMRI-based investigation. EEG has great potential to increase our understanding of the default network, however to date the application of EEG in the area has been sparse and uncoordinated. Where it is deployed, often authors will attempt to make new inferences about the default network before their EEG signal has been established as truly reflecting activity in the network. The establishement of an agreed default network marker in the EEG signal would allow for much more coordination in the investigation of the network and allow the integration of results into a coherent whole. The present work aimed to construct a robust and replicable approach to investigating whether aspects of the EEG signal may be reflective of default network activity. A three stage process was used. Firstly, the existing fMRI literature was studied to create a 'template' of default network activity during task and rest states. Secondly, the broader default network literature was studied to identify EEG signals which have been suggested to be reflective of default network activity. Finally, experiments were conducted collecting EEG data in simple task and rest states. The behaviour of the EEG signal was compared to the default network template. Very low frequency EEG and frontal midline theta were assessed on this basis. The former was not found to demonstrate identifiable default network-like acitivty, however the interpretation of this negative finding was made difficult by the lack of a general understanding of EEG in the sub 1Hz frequency range. The latter was found to bear some hallmarks of default network activity – a change in overall power and a change in low frequency power fluctuations between conditions – however these changes were in the opposite direction from those predicted. This partial fit to predictions was found to highlight strengths and weaknesses of this template matching approach. The weakness is that ambiguous results cannot readily be interpreted within an approach designed to make judgements one way or the other. The strength is that this ambiguity was not resolved with reference to the default network literature. The new aspect of the present work is that task-state signal was extracted purely from pretrial baseline periods free from the influence of event related activity, an approach does not appear to have been adopted in the fMRI literature which was used to construct the template. The benefit of these results, then, is that they pose a question which the existing literature cannot answer, suggesting future directions in both EEG and fMRI work.

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Franco, Vitor Ramos. "Monitoramento da integridade em estruturas aeronáuticas /". Ilha Solteira : [s.n.], 2009. http://hdl.handle.net/11449/94527.

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Resumo: Este trabalho apresenta o estudo e desenvolvimento de uma técnica de monitoramento da integridade estrutural, para identificação e caracterização de falhas estruturais através da metodologia das ondas de Lamb utilizando materiais piezelétricos como sensores e atuadores. Ondas de Lamb são uma forma de perturbação elástica que se propaga guiada entre duas superfícies paralelas livres. Ondas de Lamb são formadas quando o atuador excita a superfície da estrutura com um pulso depois de receber um sinal. Quando uma onda propaga na superfície de uma placa, ela chega em um PZT sensor por diferentes caminhos. Um caminho é quando a onda atinge o sensor diretamente, ou seja, sem obstáculos no caminho em que ela se propaga. Outro caminho possível é quando a onda chega ao sensor após se propagar sobre descontinuidades existentes na superfície da estrutura. Com as várias características dos sinais recebidos, e com o uso de certas técnicas de processamento de sinais, essas falhas podem ser identificadas, realizando-se a ação correta tentando evitar a total falha da estrutura. Nesse contexto, diferentes testes experimentais foram realizados em diferentes tipos de estruturas. Redes de sensores e atuadores piezelétricos foram acopladas na superfície dessas estruturas, a fim de se fazer a configuração das ondas de Lamb. Os PZTs atuadores excitaram a estrutura em altas faixas de frequência. Diferentes tipos de falhas estruturais foram simuladas, através do aumento de massa, alteração de rigidez e através de cortes na borda das estruturas. Quatro índices de falha foram utilizados para detectar a presença da falha na estrutura, são eles: Root- Means-Square Deviation (RMSD), Índice de Falha Métrica (IFM), Norma H2 e Correlation Coefficient Deviation Mean (CCDM). Estes índices foram computados através dos sinais de entrada e de saída no domínio da frequência... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This work presents the study and development of a Structural Health Monitoring technique for identification and characterization of structural damages based on Lamb waves methodology using piezoelectric materials as actuators and sensors. Lamb waves are a form of elastic perturbation that remains guided between two parallel free surfaces. Lamb waves are formed when the actuator excites the structure's surface with a pulse after receiving a signal. When the wave propagates on the structure, it comes in a PZT sensor from different paths. One path is when the wave reaches the sensor directly, i.e. without obstacles in the path in which it propagated. Another possible path is when the wave reaches the sensor after spreads on discontinuities in the structure's surface. Damages can be detected and located through several features of the received signals and with the use of certain techniques of signal processing. In this context, several experimental tests were performed on different kinds of structures. Piezoelectric actuators and sensors networks were attached on the surface of these structures in order to make the Lamb waves configuration. The PZTs actuators excited the structure in high frequency ranges. Different kinds of structural damages were simulated by increasing mass, reduction of stiffness and cuts through the edge of the structures. Four damage-sensitive indexes were used to detect the presence of the damage in the structure: Root-Means-Square Deviation (RMSD), Metric Damage Index (MDI), H2 Norm and Correlation Coefficient Deviation (CCDM). These indices were computed in the frequency domain. The results showed the viability of the Lamb waves methodology for Structural Health Monitoring system using smart materials as actuators and sensors
Orientador: Vicente Lopes Junior
Coorientador: Michael J. Brennan
Banca: Gilberto Pechoto de Melo
Banca: José Roberto de França Arruda
Mestre

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Libri sul tema "EBG STRUCTURE"

Orlandi, Antonio, Bruce Archambeault, Francesco De Paulis e Samuel Connor. Electromagnetic Bandgap (EBG) Structures. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119281559.

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Welch, Ivo. Columbus' egg: The real determinants of capital structure. Cambridge, MA: National Bureau of Economic Research, 2002.

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author, Geiser Samuel 1950, Hollinger Ruben photographer, Bähler Anna contributor e Eisenbahner-Baugenossenschaft Bern (Bern Switzerland), a cura di. Welcome home: 100 Jahre Eisenbahner-Baugenossenschaft Bern (EBG) 1919-2019. Baden: Hier und Jetzt, 2019.

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Zabashta, Andrey, Tat'yana Shalimova e Valer'yan Basov. Egg processing technology. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1085371.

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The textbook describes the structure and chemical composition of eggs, requirements for food chicken eggs, conditions for collection, sorting, packaging, transportation and storage. Possible defects of eggs and ways of their prevention are given. Technologies for the production of frozen and dry egg products are described. Meets the requirements of the Federal state educational standards of higher education of the latest generation. For undergraduate students studying in the direction 19.03.03 "food of animal origin" (profile "technology of meat and meat products").

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Groves, SE, e AL Highsmith, a cura di. Compression Response of Composite Structures. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1994. http://dx.doi.org/10.1520/stp1185-eb.

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Grant, P., e C. Rousseau, a cura di. Composite Structures: Theory and Practice. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2001. http://dx.doi.org/10.1520/stp1383-eb.

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Marini, Edoardo. The Castle of the Egg: (history and images). Napoli: Grimaldi, 2006.

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Raquel, Paul F. Striped bass egg and larval monitoring near the proposed Montezuma Slough control structure, 1987. [California]: Interagency Ecological Study Program for the Sacramento-San Joaquin Estuary, 1988.

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Kim, H., e KT Kedward, a cura di. Joining and Repair of Composite Structures. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2004. http://dx.doi.org/10.1520/stp1455-eb.

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Chaney, RC, e HY Fang, a cura di. Marine Geotechnology and Nearshore/Offshore Structures. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1986. http://dx.doi.org/10.1520/stp923-eb.

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Capitoli di libri sul tema "EBG STRUCTURE"

Vani, R. M., K. Prahlada Rao e P. V. Hunagund. "Study of Microstrip Antenna Array with EBG Structure". In Lecture Notes in Electrical Engineering, 81–90. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7293-2_9.

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Ajay Yadav, Dinesh Sethi, Priyanka Rahi e R. K. Khanna. "Design and Analysis of Right-Angled EBG Structure". In Proceedings of the International Conference on Recent Cognizance in Wireless Communication & Image Processing, 645–55. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2638-3_72.

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Neto, Almir Souza e. Silva, Marta Laís de Macedo Dantas, Joicy dos Santos Silva e Humberto César Chaves Fernandes. "Antenna for Fifth Generation (5G) Using a EBG Structure". In New Contributions in Information Systems and Technologies, 33–38. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16528-8_4.

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Ramesh, M., V. Rajya Lakshmi e P. Mallikarjuna Rao. "Miniaturized Textile Antenna Using Electromagnetic Band Gap (EBG) Structure". In Proceedings of 2nd International Conference on Micro-Electronics, Electromagnetics and Telecommunications, 13–20. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4280-5_2.

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El Abdi, Abdellah, Moussa El Ayachi e Mohammed Rahmoun. "Mutual Coupling Reduction in Array Antenna Using a New EBG Structure". In Digital Technologies and Applications, 322–29. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-02447-4_34.

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Mahajan, Rajshri C., Vini Parashar e Vibha Vyas. "Modified Unit Cell Analysis Approach for EBG Structure Analysis for Gap Width Study Effect". In Lecture Notes in Electrical Engineering, 235–43. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7091-5_22.

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Kumar, Niraj, e Priyanka Usha. "Design of Compact UWB MIMO Antenna with High Isolation Using Square Swirl Shape EBG Structure". In Proceedings of the 2nd International Conference on Signal and Data Processing, 25–33. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1410-4_3.

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Souza e Silva Neto, Almir, Artur Luiz Torres de Oliveira, Sérgio de Brito Espinola, João Ricardo Freire de Melo, José Lucas da Silva e Humberto César Chaves Fernandes. "Dual Band Patch Antenna for 5G Applications with EBG Structure in the Ground Plane and Substrate". In Advances in Intelligent Systems and Computing, 1044–49. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56538-5_107.

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Dhakad, Shailendra Kumar, Umesh Dwivedi, Sudeep Baudha e Tapesh Bhandari. "Performance Improvement of Fractal Antenna with Electromagnetic Band Gap (EBG) and Defected Ground Structure for Wireless Communication". In Lecture Notes in Electrical Engineering, 9–19. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7293-2_2.

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Zoubiri, Bachir, Abdelhalim Mayouf e Mokhtar Mokhtari. "Mutual Coupling Reduction Between Two Closely Spaced Microstrip Antennas Using Electromagnetic Band Gap (EBG) Structure for IoT Applications". In Lecture Notes in Networks and Systems, 189–95. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21216-1_20.

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Atti di convegni sul tema "EBG STRUCTURE"

Yang, S. L. S., A. A. Kishk e Kai-Fong Lee. "Comparison of patch antenna performance using wideband planar EBG structure and mushroom type EBG structure". In 2008 Asia Pacific Microwave Conference. IEEE, 2008. http://dx.doi.org/10.1109/apmc.2008.4958419.

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Abdelreheem, A. M., e M. A. Abdalla. "A novel bilateral UC-EBG structure". In 2014 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2014. http://dx.doi.org/10.1109/aps.2014.6905216.

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Elayachi, M., P. Brachat e J. M. Ribero. "Novel EBG structure for antenna miniaturization". In 2nd European Conference on Antennas and Propagation (EuCAP 2007). Institution of Engineering and Technology, 2007. http://dx.doi.org/10.1049/ic.2007.1405.

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Mohan, Akhilesh, Animesh Biswas, Andrew Gibson e Danielle Kettle. "Bandstop filter using hybrid EBG structure". In 2009 European Microwave Conference (EuMC). IEEE, 2009. http://dx.doi.org/10.23919/eumc.2009.5296508.

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Hassan, S. M. Shakil, Mohammad Nurunnabi Mollah, M. A. Rashid, N. H. Ramly e M. Othman. "Dumbbell shape EBG structure — Worth to EBG assisted microwave filter designing". In 2012 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2012. http://dx.doi.org/10.1109/apace.2012.6457620.

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Ripin, Nabilah, Robi'atun Adayiah Awang, Ahmad Asari Sulaiman, Noor Hasimah Baba e Suhaila Subahir. "Rectangular microstrip patch antenna with EBG structure". In 2012 IEEE Student Conference on Research and Development (SCOReD). IEEE, 2012. http://dx.doi.org/10.1109/scored.2012.6518651.

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Liang, Yu-fei, Yan Zhang, Tao Dong e Shan-wei Lu. "A novel conformal jigsaw EBG structure design". In 2016 IEEE International Conference on Communication Systems (ICCS). IEEE, 2016. http://dx.doi.org/10.1109/iccs.2016.7833649.

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Li-wei Wang, Yan Zhang, Lin-yu Kong, Ning Fang e Hao-qian Song. "Design of reconfigurable multi-finger EBG structure". In 2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC). IEEE, 2016. http://dx.doi.org/10.1109/apemc.2016.7522788.

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Ayop, Osman, Mohamad Kamal A. Rahim e Thelaha Masri. "Dual band Electromagnetic Band Gap (EBG) structure". In 2007 Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2007. http://dx.doi.org/10.1109/apace.2007.4603904.

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Tan, M. N. Md, M. T. Ali, S. Subahir, T. A. Rahman e S. K. A. Rahim. "Backlobe reduction using mushroom-like EBG structure". In 2012 IEEE Symposium on Wireless Technology & Applications (ISWTA). IEEE, 2012. http://dx.doi.org/10.1109/iswta.2012.6373844.

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Rapporti di organizzazioni sul tema "EBG STRUCTURE"

Rahmani, Mehran, e Manan Naik. Structural Identification and Damage Detection in Bridges using Wave Method and Uniform Shear Beam Models: A Feasibility Study. Mineta Transportation Institute, febbraio 2021. http://dx.doi.org/10.31979/mti.2021.1934.

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This report presents a wave method to be used for the structural identification and damage detection of structural components in bridges, e.g., bridge piers. This method has proven to be promising when applied to real structures and large amplitude responses in buildings (e.g., mid-rise and high-rise buildings). This study is the first application of the method to damaged bridge structures. The bridge identification was performed using wave propagation in a simple uniform shear beam model. The method identifies a wave velocity for the structure by fitting an equivalent uniform shear beam model to the impulse response functions of the recorded earthquake response. The structural damage is detected by measuring changes in the identified velocities from one damaging event to another. The method uses the acceleration response recorded in the structure to detect damage. In this study, the acceleration response from a shake-table four-span bridge tested to failure was used. Pairs of sensors were identified to represent a specific wave passage in the bridge. Wave velocities were identified for several sensor pairs and various shaking intensities are reported; further, actual observed damage in the bridge was compared with the detected reductions in the identified velocities. The results show that the identified shear wave velocities presented a decreasing trend as the shaking intensity was increased, and the average percentage reduction in the velocities was consistent with the overall observed damage in the bridge. However, there was no clear correlation between a specific wave passage and the observed reduction in the velocities. This indicates that the uniform shear beam model was too simple to localize the damage in the bridge. Instead, it provides a proxy for the overall extent of change in the response due to damage.

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Welch, Ivo. Columbus' Egg: The Real Determinant of Capital Structure. Cambridge, MA: National Bureau of Economic Research, febbraio 2002. http://dx.doi.org/10.3386/w8782.

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Ryan, J. J., A. Zagorevski, N. R. Cleven, A J Parsons e N. L. Joyce. Architecture of pericratonic Yukon-Tanana terrane in the northern Cordillera. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/326062.

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West-central Yukon and eastern Alaska are characterized by widespread metamorphic rocks that form part of the allochthonous, composite Yukon-Tanana terrane and parautochthonous North American margin. Structural windows through the Yukon-Tanana terrane expose parautochthonous North American margin in that broad region, particularly as mid-Cretaceous extensional core complexes. Both the Yukon-Tanana terrane and parautochthonous North American margin share the same Late Devonian history, making their discrimination difficult; however, distinct post-Late Devonian magmatic and metamorphic histories assist in discriminating Yukon-Tanana terrane from parautochthonous North American margin rocks. The suture between Yukon-Tanana terrane and parautochthonous North American margin is obscured by many episodes of high-strain deformation. Their main bounding structure is probably a Jurassic to Cretaceous thrust, which has been locally reactivated as a mid-Cretaceous extensional shear zone. Crustal-scale structures within composite Yukon-Tanana terrane (e.g. the Yukon River shear zone) are commonly marked by discontinuous mafic-ultramafic complexes. Some of these complexes represent orogenic peridotites that were structurally exhumed into the Yukon-Tanana terrane in the Middle Permian.

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Bell, Matthew, Rob Ament, Damon Fick e Marcel Huijser. Improving Connectivity: Innovative Fiber-Reinforced Polymer Structures for Wildlife, Bicyclists, and/or Pedestrians. Nevada Department of Transportation, settembre 2022. http://dx.doi.org/10.15788/ndot2022.09.

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Engineers and ecologists continue to explore new methods and adapt existing techniques to improve highway mitigation measures that increase motorist safety and conserve wildlife species. Crossing structures, overpasses and underpasses, combined with fences, are some of the most highly effective mitigation measures employed around the world to reduce wildlife-vehicle collisions (WVCs) with large animals, increase motorist safety, and maintain habitat connectivity across transportation networks for many other types and sizes of wildlife. Published research on structural designs and materials for wildlife crossings is limited and suggests relatively little innovation has occurred. Wildlife crossing structures for large mammals are crucial for many highway mitigation strategies, so there is a need for new, resourceful, and innovative techniques to construct these structures. This report explored the promising application of fiber-reinforced polymers (FRPs) to a wildlife crossing using an overpass. The use of FRP composites has increased due to their high strength and light weight characteristics, long service life, and low maintenance costs. They are highly customizable in shape and geometry and the materials used (e.g., resins and fibers) in their manufacture. This project explored what is known about FRP bridge structures and what commercial materials are available in North America that can be adapted for use in a wildlife crossing using an overpass structure. A 12-mile section of US Highway 97 (US-97) in Siskiyou County, California was selected as the design location. Working with the California Department of Transportation (Caltrans) and California Department of Fish and Wildlife (CDFW), a site was selected for the FRP overpass design where it would help reduce WVCs and provide habitat connectivity. The benefits of a variety of FRP materials have been incorporated into the US-97 crossing design, including in the superstructure, concrete reinforcement, fencing, and light/sound barriers on the overpass. Working with Caltrans helped identify the challenges and limitations of using FRP materials for bridge construction in California. The design was used to evaluate the life cycle costs (LCCs) of using FRP materials for wildlife infrastructure compared to traditional materials (e.g., concrete, steel, and wood). The preliminary design of an FRP wildlife overpass at the US-97 site provides an example of a feasible, efficient, and constructible alternative to the use of conventional steel and concrete materials. The LCC analysis indicated the preliminary design using FRP materials could be more cost effective over a 100-year service life than ones using traditional materials.

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Hernandez-Abrams, Darixa, Bruce Pruitt, Samantha Wiest e S. McKay. Stormwater management practices, monitoring, and maintenance plan for US Army Garrison at West Point, NY. Engineer Research and Development Center (U.S.), aprile 2023. http://dx.doi.org/10.21079/11681/46933.

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Structural stormwater management practices (SMPs) are designed and installed with the goal of reducing runoff and improving water quality through a variety of built (e.g., underground chamber and filter systems), nature-based and natural features (e.g., rain gardens, swales). In compliance with Section 402 of the US Clean Water Act (CWA), US Army Garrisons at West Point MS4 operators are required to obtain a National Pollutant Discharge Elimination System permit or a New York State Pollutant Discharge Elimination System (SPDES). These permits require development of stormwater management plans to reduce pollutants to meet the appropriate water quality standards. Over 62 structural SMPs have been installed at the US Army Garrison (USAG) to meet permit requirements. Monitoring and maintenance are essential to maintain and understand the effectiveness of these structures, track their maintenance needs, and improve their function. This document provides guidance for conducting stormwater management practice, inspection, and maintenance at the United States Army Garrison at West Point. The objectives are to inform installation managers on general SMP functions and designs, highlight key maintenance triggers affecting SMP functionality, and provide guidance on when and how to conduct inspections and maintenance actions specific to USAG SMPs and in accordance to NYS DEC.

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Smith, Ernest R. Toe Stability of Rubble-Mound Structures in a Breaking Wave and Ebb Flow Environment. Fort Belvoir, VA: Defense Technical Information Center, luglio 1999. http://dx.doi.org/10.21236/ada369056.

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Srivastava, Shiv. Structure and Function of the Splice Variants of TMPRSS2-ERG, a Prevalent Genomic Alteration in Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, settembre 2009. http://dx.doi.org/10.21236/ada517260.

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Oliynyk, Kateryna, e Matteo Ciantia. Application of a finite deformation multiplicative plasticity model with non-local hardening to the simulation of CPTu tests in a structured soil. University of Dundee, dicembre 2021. http://dx.doi.org/10.20933/100001230.

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In this paper an isotropic hardening elastoplastic constitutive model for structured soils is applied to the simulation of a standard CPTu test in a saturated soft structured clay. To allow for the extreme deformations experienced by the soil during the penetration process, the model is formulated in a fully geometric non-linear setting, based on: i) the multiplicative decomposition of the deformation gradient into an elastic and a plastic part; and, ii) on the existence of a free energy function to define the elastic behaviour of the soil. The model is equipped with two bonding-related internal variables which provide a macroscopic description of the effects of clay structure. Suitable hardening laws are employed to describe the structure degradation associated to plastic deformations. The strain-softening associated to bond degradation usually leads to strain localization and consequent formation of shear bands, whose thickness is dependent on the characteristics of the microstructure (e.g, the average grain size). Standard local constitutive models are incapable of correctly capturing this phenomenon due to the lack of an internal length scale. To overcome this limitation, the model is framed using a non-local approach by adopting volume averaged values for the internal state variables. The size of the neighbourhood over which the averaging is performed (characteristic length) is a material constant related to the microstructure which controls the shear band thickness. This extension of the model has proven effective in regularizing the pathological mesh dependence of classical finite element solutions in the post-localization regime. The results of numerical simulations, conducted for different soil permeabilities and bond strengths, show that the model captures the development of plastic deformations induced by the advancement of the cone tip; the destructuration of the clay associated with such plastic deformations; the space and time evolution of pore water pressure as the cone tip advances. The possibility of modelling the CPTu tests in a rational and computationally efficient way opens a promising new perspective for their interpretation in geotechnical site investigations.

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