Relevant bibliographies by topics / Segment stator

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

Academic literature on the topic 'Segment stator'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Segment stator"

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Naganawa, Shun, and Masahiro Ito. "MotP Subunit is Critical for Ion Selectivity and Evolution of a K+-Coupled Flagellar Motor." Biomolecules 10, no. 5 (2020): 691. http://dx.doi.org/10.3390/biom10050691.

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The bacterial flagellar motor is a sophisticated nanomachine embedded in the cell envelope. The flagellar motor is driven by an electrochemical gradient of cations such as H+, Na+, and K+ through ion channels in stator complexes embedded in the cell membrane. The flagellum is believed to rotate as a result of electrostatic interaction forces between the stator and the rotor. In bacteria of the genus Bacillus and related species, the single transmembrane segment of MotB-type subunit protein (MotB and MotS) is critical for the selection of the H+ and Na+ coupling ions. Here, we constructed and characterized several hybrid stators combined with single Na+-coupled and dual Na+- and K+-coupled stator subunits, and we report that the MotP subunit is critical for the selection of K+. This result suggested that the K+ selectivity of the MotP/MotS complexes evolved from the single Na+-coupled stator MotP/MotS complexes. This finding will promote the understanding of the evolution of flagellar motors and the molecular mechanisms of coupling ion selectivity.
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Sanders, A. J., J. Papalia, and S. Fleeter. "Multi-Blade Row Interactions in a Transonic Axial Compressor: Part I—Stator Particle Image Velocimetry (PIV) Investigation." Journal of Turbomachinery 124, no. 1 (2001): 10–18. http://dx.doi.org/10.1115/1.1411973.

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Multi-blade row interactions in an advanced design 1&1/2 stage axial-flow compressor are experimentally investigated at both subsonic and transonic rotor operating conditions using particle image velocimetry (PIV). Transonic rotor operation had a significant impact on the downstream stator unsteady flow field due to phenomena associated with the intra-stator transport of the chopped rotor wake segments. In the stator reference frame, the rotor wakes have a slip velocity relative to the mean flow that causes the low-momentum wake fluid to migrate across the vane passage and accumulate on the stator pressure surface as the chopped wake segments are transported downstream. This results in the generation of counterrotating vortices on each side of the chopped wake segment that convect downstream with the mean flow and act as an additional source of unsteadiness to the vane pressure surface. These interaction phenomena are not evident in the PIV data at the part-speed compressor operating condition due to the much lower velocity deficit and hence slip velocity associated with the subsonic rotor wakes.
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Dotsenko, Vladimir, Roman Prokudin, and Alexander Litvinenko. "Optimal Control of the Positional Electric Drive and Its Implementation." Machines 9, no. 4 (2021): 70. http://dx.doi.org/10.3390/machines9040070.

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The article deals with the optimal control of the positional electric drive of the stator element of a segment-type wind turbine. The calculation options charts current in the assumption of the minimum energy consumption and the implementation of line chart current using the phenomenon of capacitor discharge. The analysis of the implementation is expressed in a jump-like change in current and a triangular graph of the speed change. This article deals with small capacity synchronous wind turbine generators with a segment type stator. These units have the possibility of intentionally changing the air gap between the rotor and stator. This allows: (1) Reduce the starting torque on the rotor shaft, which will allow the rotor to pick up at low wind speeds. (2) Equivalent to change of air gap in this case is change of excitation of synchronous generators. Thus, the purpose of the article is to consider a method of excitation of generators in a segmented design, by controlling the gap with the electric drive, while providing control should be carried out with minimal losses.
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Zheng, M., Z. Z. Wu, and Z. Q. Zhu. "Partitioned stator flux reversal machines having Halbach array PMs." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 396–406. http://dx.doi.org/10.1108/compel-12-2015-0442.

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Purpose – In this paper, the partitioned stator flux reversal permanent magnet (PM) (PS-FRPM) machines with Halbach array PMs are investigated to compare with the machine having the conventional parallel magnetized PMs, and conventional FRPM machine. This paper aims to discuss these issues. Design/methodology/approach – The Halbach array PM machines with 2-, 3-, and 4-segment and ideal Halbach array PMs have similar topology and designed based on the PS-FRPM with parallel magnetized PMs. The open circuit analysis and electromagnetic performance has been calculated and compares with the aid of finite element (FE) method, and validated by experiments. Findings – The PS-FRPMs with Halbach array PMs have higher back-EMF and torque performance, as well as lower cogging torque and torque ripple, all having significantly higher torque density than the FRPM machine with single stator. The experimental results and FE predicted results of the 2-segment Halbach PM prototype machine are compared and good agreement is achieved. Originality/value – This paper introduces the new concept and design of PS-FRPMs having Halbach array PMs with different PM segments and idea PM array. The comparison with conventional FRPM and PS-FRPM with parallel magnetized PMs shows the benefits with PS-FRPMs with Halbach array PMs.
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Weber, Andreas R., and Gerald Steiner. "Method to Control Multiple Segmented LLSM without Position Encoder." TRANSACTIONS ON ELECTRICAL ENGINEERING 5, no. 2 (2020): 28–35. http://dx.doi.org/10.14311/tee.2016.2.028.

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<span lang="EN-GB">In recent years long stator linear synchronous motors (LLSM) started to replace the typical rotating to linear converters like belts, chains, screw systems, pulleys, disks and so on. With LLSM a lot of drawbacks in the machine concepts and design can be prevented. For long tracks, reducing reactive power and individual control of numerous moveable units, the track is segmented in several fed stator units. Because of the LLSM construction an operation with a physical position encoder is not desirable. For that reason position observers should be used instead. In this paper a method to control the multiple segmented LLSM without position encoder is proposed. The special behaviour during entrance and exit of one moveable unit in an active stator segment is described and the control concept via a master slave relationship is proposed. Experimental results are presented to demonstrate the performance and feasibility of the proposed method.</span>
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Berruti, T., S. Filippi, M. M. Gola, and S. Salvano. "Friction Damping of Interlocked Vane Segments: Experimental Results." Journal of Engineering for Gas Turbines and Power 124, no. 4 (2002): 1018–24. http://dx.doi.org/10.1115/1.1494097.

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Experimental methods and results of the stator bladed segment of an aircraft engine are presented. Investigation concerns the energy dissipation due to friction between contact surfaces of adjacent segments. The influence of the force normal to the contact surface (due to interference between adjacent segments) on friction damping is shown. Moreover, the experiments show the nature of friction at contact surfaces. The parameters of a contact model to be used in a numerical analysis have been identified from the experiments.
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Gruber, W., W. Amrhein, and M. Haslmayr. "Bearingless Segment Motor With Five Stator Elements—Design and Optimization." IEEE Transactions on Industry Applications 45, no. 4 (2009): 1301–8. http://dx.doi.org/10.1109/tia.2009.2023560.

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Tang, Y., J. J. H. Paulides, and E. A. Lomonova. "Winding topologies of flux-switching motors for in-wheel traction." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 1 (2015): 32–45. http://dx.doi.org/10.1108/compel-11-2013-0377.

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Purpose – The purpose of this paper is to investigate winding topologies for flux-switching motors (FSMs) with various segment-tooth combinations and different excitation methods. Design/methodology/approach – For the ac winding of FSM, two winding topologies, namely the concentrated winding and the distributed winding, are compared in terms of the winding factor and efficiency. For the field winding of dc-excited FSM (DCEFSM), another two winding topologies, namely the lap winding and the toroidal winding, are compared in terms of effective coil area, end-winding length, and thermal conditions. Analytical derivation is used for the general winding factor calculation. The calculation results are validated using finite element analysis. Findings – Winding factors can be used as an indication of winding efficiency for FSMs in the same manner as done for synchronous motors. For FSMs with concentrated windings, the winding factor increases when the rotor tooth number approaches a multiple of the stator segment number. For FSMs with certain segment-tooth combinations, e.g. 6/8, the theoretical maximum winding factor can be achieved by implementing distributed windings. Furthermore, the toroidal winding can be an efficient winding topology for DCEFSMs with large stator diameter and small stack length. Research limitations/implications – This work can be continued with investigating the variation of reluctance torque with respect to different segment-tooth combinations of FSM. Originality/value – This paper proposes a general method to calculate the winding factor of FSMs using only the phase number, the stator segment number, the rotor tooth number, and the skew angle. Using this method, a table of winding factors of FSMs with different segment-tooth combinations is provided. Principle of design of FSMs with high-winding factors are hence concluded. This paper also proposed the implementation of distributed windings for FSM with certain segment-tooth combinations, e.g. 6/8, by which means a theoretical maximum winding factor is achieved. In addition, different winding topologies for the field winding of DCEFSM are also investigated.
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Zhao, Fei, Hai Lin, and Byung-Il Kwon. "Performance evaluation of single-phase and two-phase U-core stator motors with notched structures in stator segment." International Journal of Applied Electromagnetics and Mechanics 52, no. 1-2 (2016): 835–42. http://dx.doi.org/10.3233/jae-162042.

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Sulaiman, Erwan, Hassan Ali, Mubin Aizat, and Zhafir Aizat. "Improved Design of Three Phase Hybrid Excitation Flux Switching Motor with Segmental Rotor." Applied Mechanics and Materials 785 (August 2015): 295–99. http://dx.doi.org/10.4028/www.scientific.net/amm.785.295.

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This paper presents the new design of Hybrid Excitation Flux Switching Motor (HEFSM) using segmental rotor structure. HEFSMs are those that consist all the excitation flux sources at their stator with robust rotor structure. The rotor is designed as segmental due to the reason that segmental rotor has ability to yield the magnetic path for conveying the field flux to nearby stator armature coil with respect to the rotation of the rotor. This design gives the clear advantage of shorter end winding compared to the toothed rotor as there is no overlap winding between field excitation coil (FEC) and armature coil. In this paper the initial design of HEFSM with segmental rotor has been improved by changing segment span, FEC slot area and armature slot area until maximum torque and power of 33.633 Nm and 8.17 KW respectively have been achieved. Moreover coil test analysis, induced voltage, cogging torque, magnetic flux characteristics, torque vs. field current density and torque vs. power speed characteristics are examined on the basis of 2-D finite element analysis (FEA).
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Dissertations / Theses on the topic "Segment stator"

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Vykopal, Petr. "Elektronicky komutovaný stroj." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217636.

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The main idea that lead to the development of EC (electronic commutation) motors is to remove from commutation motors, called DC (direct current) motors, the mechanical commutation system i.e. the cylinder brushes and the commutator that limits in most of the applications the longevity of direct current motors. The commutator is the source of electromagnetic interference and it limits the motor speed. At the same time it is required to keep the outstanding features of DC motors, mainly the multiple overload capacity, high starting torque, low time constant and small dimensions. Thesis introduces the problematic of electrically switched machines and their possible construction versions. Based on obtained findings there is performed an analytical calculation of EC-machine with classical stator (made with two grooves on pole and phase) and with segmental stator for given parameters. With the known parameters of the machines from personal design there were created models of both machine types, and the results obtained from the program FEMM were compared to those of analytical calculations.
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Frost, Emelie, and Jonathan Fredberg. "Construction of a Tool for Assembling Inner Stator Segments for a Wave Power Generator." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214756.

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A new type of wave power generator is beingdeveloped at KTH. This generator has inner stator segmentswhich consist of strong neodymium magnets and electrical steel.These are glued together in stacks with electrical steel separatingeach magnet, and the magnets are oriented with opposingmagnetic fields to the nearest magnet above and below. Inthis configuration, each piece of electrical steel connected tothe pole of a magnet becomes one pole. 19 magnets and 20pieces of electrical steel compose one phase of 20 poles, andthree phases are then stacked with glass fibre spacers calledphase blocks, creating an inner stator segment. This projectaimed to design a tool suitable for assembling these strongmagnets into rows and eventually full inner stator segments.To specify the problems and to analyse the different magneticforces present, electromagnetic simulations were made using thesoftware COMSOL Multiphysics. The results showed differentforces between the poles when varying the position of one pole.Based on the results, conclusions were made of how the mountingtool had to function. A design of the mounting tool was thenmade, using the software SolidWorks. The tool was designed toassemble one whole inner stator segment.
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Baserrah, Salwa [Verfasser], Bernd [Akademischer Betreuer] Orlik, and Bernd [Akademischer Betreuer] Kuhfuß. "Theoretical and Experimental Investigations of a Permanent Magnet Excited Transverse Flux Machine with a Segmented Stator for In-Wheel Motor Applications / Salwa Baserrah. Gutachter: Bernd Orlik ; Bernd Kuhfuß. Betreuer: Bernd Orlik." Bremen : Staats- und Universitätsbibliothek Bremen, 2014. http://d-nb.info/1072226251/34.

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Láštic, Daniel. "Deformačně-napěťová analýza elastomerových komponent flexibilní spojky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401521.

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The diploma thesis deals with computational modelling of stress-strain states in elastomeric components of a flexible coupling. The first part of the thesis is dedicated to research about usage and designs of flexible coupling and about fatigue of elastomers. The second part of the thesis concerns creation of the computational model. The model of material is determined based on uniaxial tension test of a specimen produced from a real elastomer component. The results are presented in the form of comparison of two designs of elastomer component with respect to fatigue behaviour based on a maximum principal strain range. The results of computational modelling in the viewpoint of crack initiation site are in good agreement with the results from the component used in operation and dif-ferences between the two designs are negligible. The quantitative difference of the two designs is 15 %.
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Hallouin, Baptiste. "Sur la maîtrise de l'étanchéité par segments au sein d'une turbine à gaz." Thesis, Paris, ENSAM, 2013. http://www.theses.fr/2013ENAM0005.

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Au sein des parties statiques d’une turbine à gaz, l’étanchéité du système d’air derefroidissement est couramment assurée par un montage de segments. De par sa rigiditéélevée, ce type de joint s’adapte mal aux pièces avec lesquelles il entre en contact. Uneméthodologie, associant métrologie et calcul éléments finis, a effectivement montré quel’ouverture, à l’interface entre un segment et sa piste, est très supérieure à celle qui caractériseun contact simplement rugueux. Une analyse en ordres de grandeur a révélé que lesmécanismes d’écoulement du gaz, sur un champ d’ouverture typique de l’interface entre la pisteet le segment, sont conditionnés par deux nombres adimensionnels. Trois régimes peuvent êtredistingués en fonction des valeurs prises par ces nombres. L’un d’eux, le régime laminairecompressible inertiel, est particulièrement intéressant car il est présent dans les zones de laturbine où l’étanchéité est cruciale. Un modèle quasi analytique a été développé pour décrire cerégime. En l’associant à un modèle de déformation, on aboutit à un outil prédictif du débit degaz induit par un segment. Des essais sur banc partiel ont permis de le valider et de démontrersa précision. L’outil développé fournit le moyen de quantifier l’impact du champ de température,du champ de pression et des écarts géométriques, propres à un stator de turbine, sur lesperformances de l’étanchéité. Ce travail a débouché sur des règles de dimensionnement et deconception qui portent notamment sur l’obturation du jeu inter-extrémités, sur le choix dunombre de segments et du sens de serrage<br>The sealing of gas turbine static parts is usually performed using piston rings.Because of its high stiffness, this type of gasket does not adapt itself to the parts with which it isdue to be in contact. A method involving metrology and a FEM actually revealed that the ringboreor ring-piston contact aperture is far larger than the one within a rough contact. Using ascale analysis, we showed that gas flow mechanisms, through the aperture field of the contactbetween the ring and the inner or outer part (i.e. the piston or the bore), depend on twodimensionless numbers. Three regimes can be distinguished depending on the values of thesenumbers. One of them, the compressible inertial laminar regime, is of particular interestbecause of its relevance in turbine areas where sealing is strongly critical. A quasi analyticalmodel was developed to describe this regime. By a coupling with a strain model, it wasupgraded to a predictive tool of leakage through a piston-ring or bore-ring contact. Acomparison with measurements carried out on a partial test rig allowed to prove its accuracy.This tool made it possible to quantify the influence of temperature field, pressure field andgeometrical defects, which are typical of a turbine stator, on sealing performance. This worklead us to propose design rules concerning, in particular, the ring gap type, number of rings tobe mounted and choice of tightening direction
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Hoe, Ruan. "Is migration a solution to the earnings loss of the displaced workers in the segmented labor market in the U.S.?" Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/40157.

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Earnings loss due to both lower wages at the current job and the time forgone between two jobs is one of the major consequences of job displacement caused by plant closing, moving and downsizing in the 1980s. Is migration a solution? The present study attempts to answer this question empirically by exploring five waves of data on the displaced manufacturing workers from the CPS Displaced Workers Supplements. Human capital theory and neo-classica1 theory of labor migration both assert that migration should improve people's socio-economic status. They largely neglect social and economic structural constraints on the outcomes of individual behavior. From the dynamic segmentation perspective, this study hypothesizes that deindustrialization has been squeezing workers from the subordinate (lower-tier) primary segment down and thus such workers suffered more loss than their counterparts from the independent (upper-tier) segment; since deindustrialization primarily affected the core manufacturing industries, core workers suffered greater loss from displacement relative to their peripheral counterparts. In this context, this study further hypothesizes that migration will not benefit the workers from the subordinate primary segment as much as the workers from the independent primary segments. The empirical results confirm the main hypotheses of the present study: Workers displaced from the subordinate primary segment suffered more earnings loss and longer jobless duration than their counterparts from the independent primary segment. Workers from the core industries experienced longer jobless duration than their counterparts from the peripheral segment. Migration had no effect on the postdisplacement earnings and jobless duration for the displaced workers from either segment. The clear implication of these findings is that migration is no solution. Among other things, occupation/industry change when reemployed is an important factor causing earnings loss; formal educational attainment reduces earnings loss and shortens the jobless duration while work tenure on the pre-displacement job increases earnings loss and lengthens the jobless duration.<br>Ph. D.
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Anderson, Mike, Peter Militch, and Hugh Pickens. "AN AUTONOMOUS SATELLITE TRACKING STATION." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607307.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>In 1998, AlliedSignal Technical Services (ATSC) installed three fully autonomous 13-meter satellite tracking systems for the Integrated Program Office of the National Oceanic and Atmospheric Administration (NOAA) at the Command and Data Acquisition Station near Fairbanks, Alaska. These systems track and command NOAA Polar Orbiting Weather Satellites and Defense Meteorological Satellites. Each tracking system operates for extended periods of time with little intervention other than periodic scheduling contacts. Schedule execution initiates equipment configuration, including establishing the RF communications link to the satellite. Station autonomy is achieved through use of a robust scheduler that permits remote users and the System Administrator to request pass activities for any of the supported missions. Spacecraft in the mission set are scheduled for normal operations according to the priority they have been assigned. Once the scheduler resolves conflicts, it builds a human-readable control script that executes all required support activities. Pass adds or deletes generate new schedule scripts and can be performed in seconds. The systems can be configured to support CCSDS and TDM telemetry processing, but the units installed at Fairbanks required only telemetry and command through-put capabilities. Received telemetry data is buffered on disk-storage for immediate, post-pass playback, and also on tape for long-term archiving purposes. The system can autonomously support up to 20 spacecraft with 5 different configuration setups each. L-Band, S-Band and X-Band frequencies are supported.
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Hibš, Daniel. "Lávka pro pěší." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392084.

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This diploma thesis deals with the design of a new bridge construction over a multi-lane communication. The converted road is a pedestrian and biking trail connecting significant agglomerations. Three studies were worked out in this thesis and the C variant was selected for further detailed processing. It is an unsymmetrical suspended bridge with a cast-in-place deck. In the section above the communication, the bridge is made up of prefabricated segments. Suspension of the structure is made of two sloping pylons forming a V-shape. The analysis of the construction was carried out in the MIDAS Civil program, where a complete model of construction was entered, including a subsequent estacade. The model describes the construction process and includes creep and shrinkage of the concrete. The traffic, temperature and wind loads were used. The design was assessed for the ultimate limit states and serviceability limit states. The assessment was carried out in the IDEA StatiCa program, supplemented by manual calculations. The static calculations also include assessment of the harmonic response. Subsequently, overview drawings, detailed drawings and visualizations were developed.
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Dalosto, Francisco Marchet. "Avaliação de indicadores de desempenho na análise de importância de segmentos de uma rede viária." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180876.

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A identificação dos segmentos críticos da rede viária é um conhecimento básico que todo planejador de transportes deve ter sobre a rede viária. É inevitável a ocorrência de incidentes e eventos de redução da capacidade nos elementos da rede. O efeito de acidentes e obstruções em segmentos críticos da rede ocasionam impactos que prejudicam o desempenho da rede. Este estudo foi desenvolvido com o apoio do modelo de alocação de tráfego do software VISUM (versão 2015) e propõe um método para determinar a importância de cada segmento da rede viária, a identificação de segmentos críticos da rede e a avaliação de sua obstrução de forma estática e dinâmica. Para isso, são utilizados diversos indicadores de desempenho da rede viária. O método foi aplicado na região do Litoral Norte do Rio Grande do Sul, utilizando os dados de tráfego fornecidos pela CONCEPA TRIUNFO, DAER e DNIT. A determinação da importância de cada segmento decorreu da avaliação do impacto na rede causado pela obstrução do próprio segmento. Através do método proposto neste estudo foi possível identificar o segmento crítico da rede viária estudada e, de forma qualitativa, verificar a extensão da obstrução desse segmento nas análises estática e dinâmica Verificou-se que o indicador diferença do total de tempo despendido na rede é o indicador que mais apresenta crescimento com o incremento da demanda, não apresenta alterações de priorização dos segmentos frente a variações de intensidade e sentido da demanda. Os resultados deste estudo mostraram que o segmento crítico da rede pertence a BR-101 entre os municípios de Osório e Terra de Areia. O método de hierarquização proposto independe do sentido e da intensidade da demanda, e está sujeito a mais de uma métrica para avaliar o segmento crítico. Estes resultados podem subsidiar o planejamento de transportes, identificando trechos críticos da rede viária que necessitam de mais atenção dos gestores e apontando medidas de operação no caso de eventos disruptivos nos trechos críticos.<br>Identifying the most important link of the network is essential knowledge that the transport planners should have over the network. Incidents and events of capacity reduction in network elements are inevitable. The effect of accidents and obstructions on critical network links causes impacts that hamper network performance. This study was developed with support of VISUM (version 2015) traffic assignment model software with proposes a method to determinate each network link importance level, to identify the critical link and to measure the critical link blockage impact on network. For this, several road network performance indicators are used. The method was applied in the North Coast region of Rio Grande do Sul, using traffic data provided by CONCEPA TRIUNFO, DAER and DNIT. The link level importance in define from the own link impact due its obstruction. The proposed method identified the most critical link of the studied network and verified the qualitative impact of its obstruction extent in the static and dynamic assignment analyses It was verified that the measure total spent time difference in the network is the most sensible measure that growth with a demand increase, this measure does not present changes the link importance rank against variations of intensity and direction of demand flow changes. The results of this study show that the critical link of the network belongs to the BR-101 highway between the municipalities of Osório and Terra de Areia. The proposed hierarchical method developed with several metrics measures fond the critical link in an independent demand direction and intensity analysis. The findings may support transport planners to identify the most critical arc of a network. To better implement resources of road management and repairs. Also identify where the operation measures may be implanted in face a disruptive event on a critical link.
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Do, Ngoc Anh. "Numerical analyses of segmental tunnel lining under static and dynamic loads." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0042/document.

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Cette thèse vise à étudier le comportement de revêtement articulé du tunnel en développant une nouvelle approche numérique à la Méthode de Réaction Hyperstatique (HRM) et la production des modèles numériques en deux dimensions et trois dimensions à l'aide de la méthode des différences finies (FDM). L'étude a été traitée d'abord sous charges statiques, puis effectuée sous charges dynamiques. Tout d'abord, une étude bibliographique a été effectuée. Une nouvelle approche numérique appliquée à la méthode HRM a ensuite été développée. En même temps, un modèle numérique en deux dimensions est programmé sur les conditions de charge statique dans le but d'évaluer l'influence des joints, en termes de la distribution et des caractéristiques des joints, sur le comportement du revêtement articulé de tunnel. Après cela, des modèles complets en trois dimensions d'un seul tunnel, de deux tunnels horizontaux et de deux tunnels empilés, dans lesquels le système des joints est simulé, ont été développés. Ces modèles en trois dimensions permettent d'étudier le comportement non seulement du revêtement du tunnel, mais encore le déplacement du sol entourant le tunnel lors de l’excavation. Un modèle numérique en trois dimensions simplifié a ensuite été réalisé afin de valider la nouvelle approche numérique appliquée à la méthode HRM.Dans la dernière partie de ce mémoire, la performance du revêtement articulé du tunnel sous chargements dynamiques est prise en compte par l’analyse quasi-statique et dynamique complète en utilisant le modèle numérique en deux dimensions (FDM). Un modèle HRM a également été développé prenant en compte des charges quasi-statiques. Les différences de comportement de tunnel sous chargements statiques et sismiques sont mises en évidence et expliquées<br>This PhD thesis has the aim to study the behaviour of segmental tunnel lining by developing a new numerical approach to the Hyperstatic Reaction Method (HRM) and producing two-dimensional (2D) and three-dimensional (3D) numerical models using the finite difference method (FDM). The study first deals with under static loads, and then performs under dynamic loads. Firstly, a literature review has been conducted. A new numerical approach applied to the HRM has then been developed. At the same time, a 2D numerical model is programmed regarding static loading conditions in order to evaluate the influence of the segmental joints, in terms of both joint distribution and joint stiffness characteristics, on the tunnel lining behaviour. After that, full 3D models of a single tunnel, twin horizontal tunnels and twin tunnels stacked over each other, excavated in close proximity in which the joint pattern is simulated, have been developed. These 3D models allow one to investigate the behaviour of not only the tunnel lining but also the displacement of the ground surrounding the tunnel during the tunnel excavation. A simplified 3D numerical model has then been produced in order to validate the new numerical approach applied to the HRM. In the last part of the manuscript, the performance of the segmental tunnel lining exposed to dynamic loading is taken into consideration through quasi-static and full dynamic analyses using 2D numerical models (FDM). A new HRM model has also been developed considering quasi-static loads. The differences of the tunnel behaviour under static and seismic loadings are highlighted
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Books on the topic "Segment stator"

1

Russo, Lucio. Segmenti e bastoncini: Dove sta andando la scuola? Feltrinelli, 1998.

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United States. Internal Revenue Service. Market segment specialization program: MSSP-- revolutionizing the way IRS conducts its business! 2nd ed. Dept. of the Treasury, Internal Revenue Service, 1997.

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Form, William Humbert. Segmented labor, fractured politics: Labor politics in American life. Plenum Press, 1995.

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Bertuccelli, Fulvio, ed. Soggettività, identità nazionale, memorie. Firenze University Press, 2018. http://dx.doi.org/10.36253/978-88-6453-668-2.

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Questo volume si propone di indagare le ragioni per cui in Turchia la memoria individuale e la costruzione della soggettività, intese in senso lato, debordino così spesso dai confini dell'individuo per inglobare le problematiche dell'identità nazionale. Le "scritture del sé", che siano confessioni, memorie, romanzi autobiografici e biografici, sono state scelte quali strumenti per giungere a comprendere i meccanismi di costruzione della memoria individuale e collettiva. Le problematiche relative alla costruzione della moderna nazione turca con i suoi eventi storici traumatici, gli approcci al tema della memoria da parte dei segmenti esclusi dal discorso dominante ed egemone, costituiscono i nuclei tematici centrali attorno a cui si sviluppa la riflessione degli autori.
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Mineva, Oksana, Elena Gadzhieva, Diana Smirnova, and Svetlana Arutyunyan. Management of social adaptation and motivation to the development of modern society. INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1002556.

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The textbook is a systematic exposition of the issues associated with the management of social adaptation and motivation to the development of modern society. Discusses the current problems of adaptation for socially excluded segments of the population (migrants, persons living with HIV and their families, the disabled, families of prisoners and individuals released from places of imprisonment, etc.), the role of civil society, business and ordinary citizens in the process of socialization.&#x0D; Meets the requirements of Federal state educational standards of higher education of the last generation.&#x0D; For graduate students enrolled in the direction of preparation "personnel Management", faculty and graduate students of economic universities, students of retraining and advanced training of specialists and executives as well as entrepreneurs.
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Tan, Lee. Buddhist Revitalization and Chinese Religions in Malaysia. Amsterdam University Press, 2020. http://dx.doi.org/10.5117/9789463726436.

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Buddhist Revitalization and Chinese Religions in Malaysia tells the story of how a minority community comes to grips with the challenges of modernity, history, globalization, and cultural assertion in an ever-changing Malaysia. It captures the religious connection, transformation, and tension within a complex traditional belief system in a multi-religious society. In particular, the book revolves around a discussion on the religious revitalization of Chinese Buddhism in modern Malaysia. This Buddhist revitalization movement is intertwined with various forces, such as colonialism, religious transnationalism, and global capitalism. Reformist Buddhists have helped to remake Malaysia’s urban-dwelling Chinese community and have provided an exit option in the Malay and Muslim majority nation state. As Malaysia modernizes, there have been increasing efforts by certain segments of the country’s ethnic Chinese Buddhist population to separate Buddhism from popular Chinese religions. Nevertheless, these reformist groups face counterforces from traditional Chinese religionists within the context of the cultural complexity of the Chinese belief system.
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Oude Nijhuis, Dennie. Religion, Class, and the Postwar Development of the Dutch Welfare State. Amsterdam University Press, 2018. http://dx.doi.org/10.5117/9789462986411.

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This book examines how the Netherlands managed to create and maintain one of the world’s most generous and inclusive welfare systems despite having been dominated by Christian-democratic or ŸconservativeŒ, rather than socialist dominated governments, for most of the post-war period. It emphasizes that such systems have strong consequences for the distribution of income and risk among different segments of society and argues that they could consequently only emerge in countries where middle class groups were unable to utilize their key electoral and strong labor market position to mobilize against the adverse consequences of redistribution for them. By illustrating their key role in the coming about of solidaristic welfare reform in the Netherlands, the book also offers a novel view of the roles of Christian-democracy and the labor union movement in the development of modern welfare states. By highlighting how welfare reform contributed to the employment miracle of the 1990s, the book sheds new light on how countries are able to combine high levels of welfare generosity and solidarity with successful macro-economic performance.
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Afanas'ev, Mihail, Mihail Bendikov, and Stanislav Korunov. Fundamentals of the economy of space activities. INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1018193.

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The textbook describes in detail the classification of space goods and services, the segments and sectors of the global space market, the development prospects and the positioning of Russian enterprises in them. The methodological feature of the course consists in new approaches to the segmentation of the market and areas of space activities, identifying their deep relationships with the space industry. The practical side of the course is aimed at studying the methodology and practice of space project management, space pricing, organization of placement and execution of space government orders, and market analytics. The tutorial contains test questions for each chapter, test tasks, and a wide selection of topics for course design. The subject of the course papers is related to the specific activities of the enterprises of the space industry. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for third-year undergraduate and graduate students specializing in the field of training 38.03.01 and 38.04.01 "Economics" in the specialties "Economics of Space activities", "Economics of high-tech industries".
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Andò, Valeria. Euripide, Ifigenia in Aulide. Fondazione Università Ca’ Foscari, 2021. http://dx.doi.org/10.30687/978-88-6969-513-1.

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This volume contains the first Italian critical edition with introduction, translation and commentary of Euripides’ Iphigenia in Aulis. The tragedy, exhibited posthumously in 405 BCE, stages the first mythical segment of the Trojan War, namely the sacrifice of Iphigenia, daughter of king Agamemnon, head of the Greek army, in order to propitiate the winds that should lead the navy to Troy. A tragedy of intrigue and unveiling, in which all the characters try to oppose the sacrifice, judged to be an impiety despite its sacred essence. It is therefore a tragedy without gods, in which characters of modest moral stature move, unstable, ready to sudden changes of mind, and among whom the protagonist stands out: the girl who, having overcome the dismay for the destiny awaiting her, voluntarily moves towards death on the altar, for a flimsy patriotic ideal and with the illusion of achieving immortal glory. Since the end of the eighteenth century, the text of this tragedy, handed over to us by the manuscript tradition, has been exposed more than others to a rigorous philological criticism that has broken its unity, through considerable expunctions of entire sections and sequences of verses. The volume traces the phases of this critical work, showing its methods – and sometimes its excesses – and choosing a balance line in the constitution of the text. The overall exegesis of the tragedy, which I propose in this study, consists in the belief that, despite the exodus being spurious, the finale, in view of which the entire dramaturgy was composed, still had to contemplate Iphigenia’s salvation. In fact, if the Panhellenic ideal of defence against the barbarians is now meaningless, and if a war of destruction, to begin with, needs the death of an innocent person, then this death must be transcended and the horror of human sacrifice must dissolve. It therefore seems that, once political current events become opaque, the poet’s research tends to create situations of great patheticism in an aesthetic setting of refined beauty.
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Market segment specialization program: Construction industry. Internal Revenue Service, 1998.

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Book chapters on the topic "Segment stator"

1

Eksteen, Riaan. "SCOTUS (Segment A)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_3.

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Eksteen, Riaan. "SCOTUS (Segment B)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_4.

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Eksteen, Riaan. "SCOTUS (Segment C)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_5.

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Eksteen, Riaan. "SCOTUS (Segment D)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_6.

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Pellissery, Sony, Saloni Jain, and Geo Varghese. "Access to Social Protection by Immigrants, Emigrants and Resident Nationals in India." In IMISCOE Research Series. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51237-8_8.

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AbstractIndia has a segmented social protection system. About 92% of workers in India are in unorganised sector, deprived of formal social security provisions. Those who are in formal sector receive very generous social protection arrangements close to that of welfare states in Europe, primarily influenced by the colonial legacy. Those in the informal sector primarily meet their social security needs from their disposable income. With expansive private welfare providers, the rich segment in the informal segment is able to afford this. Indian unskilled migrants, mainly in the Gulf region, have a range of benefits that are primarily to meet the civil rights, rather than social rights. Compared to this, Indian migrants in Western Europe and the Americas mainly benefit from the social security system in those countries. On the other hand, foreigners coming to India have limited social security arrangements. Since 2000, India has entered into bilateral agreements with several countries, which also recognise a new category of workers called ‘international workers’. These workers have their social security benefits primarily protected as in source country.
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Urban, Caterina. "The Abstract Domain of Segmented Ranking Functions." In Static Analysis. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38856-9_5.

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Eksteen, Riaan. "European Court of Justice (Segment C)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_10.

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Eksteen, Riaan. "European Court of Justice (Segment A)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_8.

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Eksteen, Riaan. "European Court of Justice (Segment B)." In The Role of the Highest Courts of the United States of America and South Africa, and the European Court of Justice in Foreign Affairs. T.M.C. Asser Press, 2019. http://dx.doi.org/10.1007/978-94-6265-295-8_9.

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Brédas, J. L., J. M. Toussaint, G. Hennico, et al. "Theoretical Investigations of Segmented Polyacetylene." In Springer Series in Solid-State Sciences. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83284-0_9.

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Conference papers on the topic "Segment stator"

1

Berruti, T., L. Goglio, S. Filippi, and M. M. Gola. "Forced Vibrations of Frictionally Damped Stator Segments." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-412.

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The paper deals with the use of friction among bladed segments to reduce vibrations in turbomachinery. The non-linearity of the phenomenon is included in the analysis after that the detailed finite element model of the segment has been condensed. In the solution search, both numerical integration and harmonic balance method are used. The latter is here extended to the case of slip among parts in relative motion. By means of a sample case it is shown that the simplified harmonic solution can lead to the same results given by time-consuming numerical integration. Some insight on the slipping phenomenon between segments is obtained.
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Arghir, Mihai, and Antoine Mariot. "Theoretical Analysis of the Static Characteristics of the Carbon Segmented Seal." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56643.

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The segmented carbon seal is regularly used for sealing bearing chambers of aeronautical turboengines or as part of a buffer seal in space turbopumps. The seal operates with contaminated air or with an inert gas and is made of many identic carbon segments (generally three or six) with reciprocally overlapping ends. The segments are serrated against the rotor by the pressure difference between the upstream and the downstream chambers and by a circumferential (garter) spring. The pressure difference and an axial spring press the segments also against the stator. The inner cylindrical surface of each segment is provided with pads that create an aerodynamic lift proportional to the rotor speed. Following this lift force, the segments of the seal are pushed away from the rotor and the seal opens. The contact between the rotor and the segments is lost and an axial leakage path is thus created. Although it was developed since long, a model for calculating the characteristics of the segmented seal is completely absent from the scientific literature. The goal of the present work is to fill this gap at least for the static characteristics (leakage and torque). The analysis is carried out for a single segment of the seal by supposing that all the segments have the same characteristics. Each segment has a planar motion (i.e. three degrees of freedom) and therefore the film thickness under each pad is not uniform. Given the stationary operating conditions (pressure difference and rotation speed), the present model calculates the equilibrium position of each segment on the bases of the lift and of the friction force acting on the pads, of the friction forces acting on the nose of the seal and of the radial and axial springs. Once found the static equilibrium position, the leakage and the torque of the seal are calculated. A parametric study enlightens the importance of the pad waviness, of the pocket depth and of the spring forces on the characteristics of the segmented seal.
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Lobo, N. S., E. Swint, and R. Krishnan. "M-Phase N-Segment Flux-Reversal-Free Stator Switched Reluctance Machines." In 2008 IEEE Industry Applications Society Annual Meeting (IAS). IEEE, 2008. http://dx.doi.org/10.1109/08ias.2008.69.

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Sanders, A. J., J. Papalia, and S. Fleeter. "Multi-Blade Row Interactions in a Transonic Axial Compressor: Part I — Stator Particle Image Velocimetry (PIV) Investigation." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0268.

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Multi-blade row interactions in an advanced design 1&amp;1/2 stage axial-flow compressor are experimentally investigated at both subsonic and transonic rotor operating conditions using particle image velocimetry (PIV). Transonic rotor operation had a significant impact on the downstream stator unsteady flow field due to phenomena associated with the intra-stator transport of the chopped rotor wake segments. In the stator reference frame, the rotor wakes have a slip velocity relative to the mean flow that causes the low momentum wake fluid to migrate across the vane passage and accumulate on the stator pressure surface as the chopped wake segments are transported downstream. This results in the generation of counter-rotating vortices on each side of the chopped wake segment that convect downstream with the mean flow and act as an additional source of unsteadiness to the vane pressure surface. These interaction phenomena are not evident in the PIV data at the part-speed compressor operating condition due to the much lower velocity deficit and hence slip velocity associated with the subsonic rotor wakes.
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Xu, Yan Liang, Bing Lin Lu, and Xiao Gong. "Equivalent magnetic circuit model of novel disk transverse-flux segment-stator permanent magnet brushless machine." In 2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD). IEEE, 2015. http://dx.doi.org/10.1109/asemd.2015.7453475.

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Berruti, T., S. Filippi, M. M. Gola, and S. Salvano. "Friction Damping of Interlocked Vane Segments: Experimental Results." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0432.

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Experimental methods and results of the stator bladed segment of an aircraft engine are presented. Investigation concern the energy dissipation due to friction between contact surfaces of adjacent segments. The influence of the force normal to the contact surface (due to interference between adjacent segments) on friction damping is shown. Moreover the experiments show the nature of friction at contact surfaces. The parameters of a contact model to be used in a numerical analysis have been identified from the experiments.
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Bladh, Ronnie, Qingyuan Zhuang, Jiasen Hu, and Johan Hammar. "Leakage-Induced Compressor Blade Excitation due to Inter-Segment Gaps." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-70040.

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A comprehensive investigation is presented related to leakage-induced blade excitation from shrouded vane segments found in industrial gas turbine compressors. The focus of the investigation is to explore the excitation mechanism acting on downstream rotor blades that stem from the particularly complex leakage flows around the hub inter-segment gaps. The aerodynamic forces are here determined using 3D nonlinear time-marching CFD simulations. The employed computational model encompasses the two rear-most stages in an existing industrial gas turbine compressor. The inter-segment gap is implemented in the next-to-last stator, varying from no gap to twice the nominal gap size. Obtained results indicate that the excitation induced by the inter-segment gap leakage flows is distinctly multi-harmonic and unexpectedly strong. As much as five times the excitation strength of upstream wakes was observed already for the nominal gap. The induced unsteady forces were found to derive from two different sources: (i) a large separation producing local forcing in the hub region; and (ii) circumferentially varying flow speed resulting in distributed forcing over the entire blade. The findings imply that the excitation induced by inter-segment gap leakage flows can be a significant contributor to blade vibratory responses in the intermediate engine order range, and thereby add to the knowledge base related to blade dynamic integrity.
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HANSEN, J., and T. OKIISHI. "Rotor wake segment influence on stator-surface boundary layer development in an axial-flow compressor stage." In 23rd Joint Propulsion Conference. American Institute of Aeronautics and Astronautics, 1987. http://dx.doi.org/10.2514/6.1987-1741.

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Zhao Mei, Zou Ji-bin, Jiang Xin-tong, Fu Xing-he, and Chandur Sadarangani. "Influence of axial length ratio of stator segment on performance of tubular transverse flux linear machine." In 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010). IEEE, 2010. http://dx.doi.org/10.1109/cefc.2010.5481161.

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Chen, Ping-Ping, Wei-Yang Qiao, Karsten Liesner, and Robert Meyer. "Effect of Segment Endwall Boundary Layer Suction on Compressor 3D Corner Separation." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42024.

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Due to the strong secondary flow behavior in the compressor endwall/blade suction-side corner region, a large three-dimensional corner separation will usually be formed with large amounts of compressor aerodynamic loss. In this paper, a linear high-speed compressor cascade, with five NACA 65-K48 stator profiles, is numerically simulated to understand the state of this phenomenon. Based on the experiment, the base flow is validated for the numerical result. Active control of 3D corner separation was investigated by using segment endwall boundary layer suction, which is located along the pressure-side leg of leading-edge horse-shoe vortex during its development in the frontal part of the blade passage. The influence of suction flow ratio was investigated in an effort to quantify the improvements of compressor cascade performance. The results show the optimal suction flow ratio is not the largest, but a critical value, which is 0.83% of inflow mass flow rate. Taking all performance parameters’ changes into consideration, the best is with 1% suction flow ratio. The total-pressure loss is eventually reduced by 11.2% with the optimal suction flow ratio compared to the design condition, and an increase of 9.84% is obtained for the static-pressure ratio.
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Reports on the topic "Segment stator"

1

Previdi, S., C. Filsfils, H. Gredler, and M. Chen. Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing. Edited by K. Talaulikar. RFC Editor, 2021. http://dx.doi.org/10.17487/rfc9085.

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Previdi, S., C. Filsfils, K. Patel, S. Ray, and J. Dong. Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing BGP Egress Peer Engineering. Edited by K. Talaulikar. RFC Editor, 2021. http://dx.doi.org/10.17487/rfc9086.

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Winters, Philip, Amy Lester, and Minh Pham. SEGMENT: Applicability of an Existing Segmentation Technique to TDM Social Marketing Campaigns in the United States. Transportation Research and Education Center (TREC), 2018. http://dx.doi.org/10.15760/trec.210.

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Khan, Saif M. Securing Semiconductor Supply Chains. Center for Security and Emerging Technology, 2021. http://dx.doi.org/10.51593/20190017.

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The countries with the greatest capacity to develop, produce and acquire state-of-the-art semiconductor chips hold key advantages in the development of emerging technologies. At present, the United States and its allies possess significant leverage over core segments of the supply chain used to produce these chips. This policy brief outlines actions the United States and its allies can take to secure that advantage in the long term and use it to promote the beneficial use of emerging technologies, such as artificial intelligence.
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Andersson, L., H. van Helvoort, J. Shin, L. Wang, and A. D'Alessandro. Switching Provider Edge (S-PE) Protection for MPLS and MPLS Transport Profile (MPLS-TP) Static Multi-Segment Pseudowires. Edited by A. Malis. RFC Editor, 2016. http://dx.doi.org/10.17487/rfc7771.

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Au-Yeung, Anna, Chuck Kuczaj, Rick Bright, Lynn Thompson, and Gerry Mitchell. ADST System/Segment Design Document for the Protocol Translator. Advanced Distributed Simulation Technology/Crew Station Research and Development Facility. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada282814.

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Kelly, K., J. Brown, G. Kamsickas, and W. Tucker. Modular Simulator System (MSS). System/Segment Specification for the Generic Modular Simulator System - Instructor/Operator Station Module. Volume 12. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada276979.

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Tiburu, Elvis K. Determination of the Dynamics, Structure, and Orientation of the Transmembrane Segment of ErbB2 in Model Membranes Using Solid-State NMR Spectroscopy. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada482328.

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Saha, Sunil, and Jon Fricker. The development of a procedure to forecast traffic volumes on urban segments of the state and interstate highway systems. Purdue University Press, 1990. http://dx.doi.org/10.5703/1288284313428.

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Gehlhaus, Diana, and Ilya Rahkovsky. U.S. AI Workforce: Labor Market Dynamics. Center for Security and Emerging Technology, 2021. http://dx.doi.org/10.51593/20200086.

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A lack of good data on the U.S. artificial intelligence workforce limits the potential effectiveness of policies meant to increase and cultivate this cadre of talent. In this issue brief, the authors bridge that information gap with new analysis on the state of the U.S. AI workforce, along with insight into the ongoing concern over AI talent shortages. Their findings suggest some segments of the AI workforce are more likely than others to be experiencing a supply-demand gap.
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