Готові списки джерел за темами / GMAC

Добірка наукової літератури з теми "GMAC"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "GMAC"

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Sameer Sadeq, Abdulrahman, Rosilah Hassan, Azana Hafizah Mohd Aman, Hasimi Sallehudin, Khalid Allehaibi, Nasser Albogami, and Anton Satria Prabuwono. "MAC protocol with grouping awareness GMAC for large scale Internet-of-Things network." PeerJ Computer Science 7 (November 22, 2021): e733. http://dx.doi.org/10.7717/peerj-cs.733.

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Анотація:
The development of Medium Access Control (MAC) protocols for Internet of Things should consider various aspects such as energy saving, scalability for a wide number of nodes, and grouping awareness. Although numerous protocols consider these aspects in the limited view of handling the medium access, the proposed Grouping MAC (GMAC) exploits prior knowledge of geographic node distribution in the environment and their priority levels. Such awareness enables GMAC to significantly reduce the number of collisions and prolong the network lifetime. GMAC is developed on the basis of five cycles that manage data transmission between sensors and cluster head and between cluster head and sink. These two stages of communication increase the efficiency of energy consumption for transmitting packets. In addition, GMAC contains slot decomposition and assignment based on node priority, and, therefore, is a grouping-aware protocol. Compared with standard benchmarks IEEE 802.15.4 and industrial automation standard 100.11a and user-defined grouping, GMAC protocols generate a Packet Delivery Ratio (PDR) higher than 90%, whereas the PDR of benchmark is as low as 75% in some scenarios and 30% in others. In addition, the GMAC accomplishes lower end-to-end (e2e) delay than the least e2e delay of IEEE with a difference of 3 s. Regarding energy consumption, the consumed energy is 28.1 W/h for GMAC-IEEE Energy Aware (EA) and GMAC-IEEE, which is less than that for IEEE 802.15.4 (578 W/h) in certain scenarios.
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2

Yuan, Haoheng, and Bin Dai. "A Capacity-Achieving Feedback Scheme of the Gaussian Multiple-Access Channel with Degraded Message Sets." Entropy 23, no. 6 (June 16, 2021): 756. http://dx.doi.org/10.3390/e23060756.

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The classical Schalkwijk–Kailath (SK) scheme for the point-to-point white Gaussian channel with noiseless feedback plays an important role in information theory due to the fact that it is capacity-achieving and the complexity of its encoding–decoding procedure is extremely low. In recent years, it has been shown that an extended SK feedback scheme also achieves the capacity region of the two-user Gaussian multiple-access channel with noiseless feedback (GMAC-NF), where two independent messages are, respectively, encoded by two intended transmitters. However, for the two-user GMAC-NF with degraded message sets (one common message for both users and one private message for an intended user), the capacity-achieving feedback scheme remains open. In this paper, we propose a novel two-step SK-type feedback scheme for the two-user GMAC-NF with degraded message sets and show that this scheme is capacity-achieving.
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3

Pires de Miranda, Marta, M. Carmo Gomes, and H. Rebelo de Andrade. "Seroprevalence of antibodies to poliovirus in individuals living in Portugal, 2002." Eurosurveillance 12, no. 6 (June 1, 2007): 7–8. http://dx.doi.org/10.2807/esm.12.06.00717-en.

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Анотація:
The last case of poliomyelitis in Portugal caused by indigenous wild poliovirus occurred in 1986 and the country was declared polio-free in 2002. High levels of immunity must be maintained to prevent the importation of wild poliovirus. In this study, we determined the immunity against poliomyelitis of the Portuguese population in order to identify possible immunity gaps. A representative sample of 1,133 individuals older than two years residing in mainland Portugal was studied. Logistical difficulties regarding quick sample transportation precluded the Portuguese islands (Madeira and the Azores) from this study. Sera were collected in 2002 from individuals attending health clinics throughout the 18 districts of Portugal. Levels of neutralizing antibodies against poliovirus types 1, 2 and 3 were determined and a titre of >= 1:8 was defined as indicative of protected immunity. Results were expressed in international units. The antibody prevalence and the geometric mean antibody concentration (GMAC) was 91.6% (GMAC: 2.96 IU/ml), 94.2% (GMAC: 5.03 IU/ml) and 75% (GMAC: 0.53 IU/ml) for poliovirus types 1, 2 and 3, respectively. For poliovirus types 1 and 2, antibody prevalence was close to or above 90% in the majority of age groups. For poliovirus type 3, antibody prevalence was below 80% in teenagers and young adults. Our study shows that the Portuguese are well protected against poliovirus types 1 and 2. For poliovirus type 3, the suboptimal antibody levels observed in teenagers and young adults suggest the need for a booster dose to minimise the risk of wild poliovirus importation.
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4

Menkus, Belden. "Dealer uses phony data to defraud GMAC." Computer Fraud & Security Bulletin 1992, no. 7 (July 1992): 5. http://dx.doi.org/10.1016/0142-0496(92)90011-7.

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5

Heijman, Wim. "The MBA labour market: A note on the global perspectives for graduates in 2015." Applied Studies in Agribusiness and Commerce 10, no. 1 (March 31, 2016): 91–93. http://dx.doi.org/10.19041/apstract/2016/1/12.

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Анотація:
What are the labour market perspectives for MBA graduates in 2015? Each year the GMAC carries out a year-end poll to find out the hiring plans of the employers with respect to graduates in business studies. This short notes presents the most important results for MBA graduates.
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6

Varshney, Abhishek, Samit Kumar Ghosh, Sibasankar Padhy, Rajesh Kumar Tripathy, and U. Rajendra Acharya. "Automated Classification of Mental Arithmetic Tasks Using Recurrent Neural Network and Entropy Features Obtained from Multi-Channel EEG Signals." Electronics 10, no. 9 (May 2, 2021): 1079. http://dx.doi.org/10.3390/electronics10091079.

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The automated classification of cognitive workload tasks based on the analysis of multi-channel EEG signals is vital for human–computer interface (HCI) applications. In this paper, we propose a computerized approach for categorizing mental-arithmetic-based cognitive workload tasks using multi-channel electroencephalogram (EEG) signals. The approach evaluates various entropy features, such as the approximation entropy, sample entropy, permutation entropy, dispersion entropy, and slope entropy, from each channel of the EEG signal. These features were fed to various recurrent neural network (RNN) models, such as long-short term memory (LSTM), bidirectional LSTM (BLSTM), and gated recurrent unit (GRU), for the automated classification of mental-arithmetic-based cognitive workload tasks. Two cognitive workload classification strategies (bad mental arithmetic calculation (BMAC) vs. good mental arithmetic calculation (GMAC); and before mental arithmetic calculation (BFMAC) vs. during mental arithmetic calculation (DMAC)) are considered in this work. The approach was evaluated using the publicly available mental arithmetic task-based EEG database. The results reveal that our proposed approach obtained classification accuracy values of 99.81%, 99.43%, and 99.81%, using the LSTM, BLSTM, and GRU-based RNN classifiers, respectively for the BMAC vs. GMAC cognitive workload classification strategy using all entropy features and a 10-fold cross-validation (CV) technique. The slope entropy features combined with each RNN-based model obtained higher classification accuracy compared with other entropy features for the classification of the BMAC vs. GMAC task. We obtained the average classification accuracy values of 99.39%, 99.44%, and 99.63% for the classification of the BFMAC vs. DMAC tasks, using the LSTM, BLSTM, and GRU classifiers with all entropy features and a hold-out CV scheme. Our developed automated mental arithmetic task system is ready to be tested with more databases for real-world applications.
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7

Schuts, Mathijs, Feng Zhu, Faranak Heidarian, and Frits Vaandrager. "Modelling Clock Synchronization in the Chess gMAC WSN Protocol." Electronic Proceedings in Theoretical Computer Science 13 (December 10, 2009): 41–54. http://dx.doi.org/10.4204/eptcs.13.4.

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8

Gotthelf, Pablo, Alejandro Zunino, Cristian Mateos, and Marcelo Campo. "GMAC: An overlay multicast network for mobile agent platforms." Journal of Parallel and Distributed Computing 68, no. 8 (August 2008): 1081–96. http://dx.doi.org/10.1016/j.jpdc.2008.04.002.

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9

Du, Xian, and Sumeet Dua. "Segmentation of Fluorescence Microscopy Cell Images Using Unsupervised Mining." Open Medical Informatics Journal 4, no. 1 (May 28, 2010): 41–49. http://dx.doi.org/10.2174/1874431101004020041.

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Анотація:
The accurate measurement of cell and nuclei contours are critical for the sensitive and specific detection of changes in normal cells in several medical informatics disciplines. Within microscopy, this task is facilitated using fluorescence cell stains, and segmentation is often the first step in such approaches. Due to the complex nature of cell issues and problems inherent to microscopy, unsupervised mining approaches of clustering can be incorporated in the segmentation of cells. In this study, we have developed and evaluated the performance of multiple unsupervised data mining techniques in cell image segmentation. We adapt four distinctive, yet complementary, methods for unsupervised learning, including those based on k-means clustering, EM, Otsu’s threshold, and GMAC. Validation measures are defined, and the performance of the techniques is evaluated both quantitatively and qualitatively using synthetic and recently published real data. Experimental results demonstrate that k-means, Otsu’s threshold, and GMAC perform similarly, and have more precise segmentation results than EM. We report that EM has higher recall values and lower precision results from under-segmentation due to its Gaussian model assumption. We also demonstrate that these methods need spatial information to segment complex real cell images with a high degree of efficacy, as expected in many medical informatics applications.
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10

Křehlík, Štěpán, Michal Novák, and Jana Vyroubalová. "From Automata to Multiautomata via Theory of Hypercompositional Structures." Mathematics 10, no. 1 (December 21, 2021): 1. http://dx.doi.org/10.3390/math10010001.

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Анотація:
In this paper, we study two important problems related to quasi-multiautomata: the complicated nature of verification of the GMAC condition for systems of quasi-multiautomata, and the fact that the nature of quasi-multiautomata has deviated from the original nature of automata as seen by the theory of formal languages. For the former problem, we include several new conditions that simplify the procedure. For the latter problem, we close this gap by presenting a construction of quasi-multiautomata, which corresponds to deterministic automata of the theory of formal languages and is based on the operation of concatenation.
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Більше джерел

Дисертації з теми "GMAC"

1

Harris, I. D. "High-speed GMAW and laser GMAW hybrid welding of steel sheet." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4571.

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Анотація:
Arc welding is the most widely used set of joining technologies in industry today. The automotive tier supplier network and light manufacturing are significant users of arc welding, particularly gas metal arc welding (GMAW) and pulsed GMAW (GMAW-P). For sheet metal welding the majority of welds are single pass fillet welds on T-butt, lap, or edge joints. A fundamental problem and limitation to the use of higher travel speeds in GMAW is the phenomenon of weld bead humping, a weld profile defect with a wavelike profile to the weld bead that has peaks and troughs in the longitudinal direction.
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2

Egerer, Johannes. "The Golgin GMAP-210." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-88207.

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3

SILVA, Eduardo Pereira da. "Avaliação comparativa dos processos de soldagem GMAW convencional e GMAW-STT® em aço inoxidável duplex UNS S32205." reponame:Repositório Institucional da UNIFEI, 2018. http://repositorio.unifei.edu.br/xmlui/handle/123456789/1624.

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Анотація:
Submitted by repositorio repositorio (repositorio@unifei.edu.br) on 2018-09-04T17:17:31Z No. of bitstreams: 1 dissertacao_2018120.pdf: 10328293 bytes, checksum: 10f74c8f45f9c9ebab6193eac6d7a61b (MD5)
Made available in DSpace on 2018-09-04T17:17:31Z (GMT). No. of bitstreams: 1 dissertacao_2018120.pdf: 10328293 bytes, checksum: 10f74c8f45f9c9ebab6193eac6d7a61b (MD5) Previous issue date: 2018-08
Este trabalho se propôs a investigar a influência dos parâmetros de soldagem do processo GMAW derivativo STT (Surface Tension Transferᵀᴹ) na soldagem do aço inoxidável duplex (AID) UNS S32205, comparando seus resultados ao processo GMAW convencional. Para tanto, foi realizado o planejamento experimental possibilitando a interação dos fatores estudados em todos os seus níveis, posteriormente foram realizadas as soldas, seguida da preparação dos corpos de prova para caracterização microestrutural, ensaios de tração mecânica, ensaios de impacto e ensaio de microdureza. As soldas foram realizadas emjuntas em chanfro utilizando aporte de energia entre 1,48 e 3,17 kJ/cm. A variação dos parâmetros nos níveis de trabalho adotados mostrou-se significativa quanto a influência nas propriedades microestruturais, geométricas e mecânicas da junta soldada. As soldas realizadas pelo processo GMAW-STT® apresentou melhores características geométricas e microestruturais do que o processo convencional com a mesma energia de soldagem, resultando em melhores propriedades mecânicas, em contrapartida algumas condições propiciaram a precipitação de fases intermetálicas na zona termicamente afetada (ZTA) e adjacências. O resultado tanto da caracterização microestrutural como dos ensaios mecânicos evidenciou a alteração de características fundamentais do material em estudo em função do tipo de processo utilizado, destacando os benefícios do processo GMAW-STT® em relação ao convencional, não somente no controle preciso das variáveis de entrada, mas também na qualidade final das juntas soldadas dentro dos limites trabalhados nesta pesquisa.
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4

Prakki, Anuradha. "Influência de aditivos nas propriedades de comonômeros, copolímeros e compósitos a base de Bis-GMA, diluído com TEGDMA ou análogos sintetizados do Bis-GMA (CH3Bis-GMA e CF3Bis-GMA)." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25131/tde-11102007-093822/.

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Анотація:
O objetivo deste estudo foi avaliar a influência de dois aditivos, propionaldehyde (propanal aldeído) e 2,3-butanedione (diquetona diacetil), nas propriedades de comonômeros, copolímeros e resinas compostas à base de Bis-GMA, quando diluído com TEGDMA, Bis-GMA propoxilado (CH3Bis-GMA) e Bis-GMA propoxilado fluorinado (CF3Bis-GMA). Comonômeros, copolímeros e compósitos experimentais foram preparados combinando Bis-GMA com TEGDMA, CH3Bis-GMA, CF3Bis-GMA e, aldeído (24 e/ou 32 mol%) e diquetona (24 e/ou 32 mol%). No caso dos compósitos, partículas híbridas silanizadas (bário aluminosilicato; 60 peso%) foram adicionadas aos comonômeros. Para a fotopolimerização, adicionou-se canforoquinona (0,2 peso%) e N,N-dimetil-p-toluidina (0,2 peso%). Os comonômeros e copolímeros experimentais tiveram as seguintes propriedades avaliadas: viscosidade, contração de polimerização, grau de conversão, ângulo de contato (em esmalte, dentina e vidro), temperatura de transição vítrea (DSC e equação de Fox), microdureza, alteração de rugosidade superficial e desgaste por abrasão. Os compósitos experimentais, tiveram avaliadas as seguintes propriedades: resistência flexural, módulo de elasticidade, tração diametral, módulo de resiliência, microdureza, alteração de rugosidade superficial e desgaste por abrasão. Os sistemas Bis-GMA/TEGDMA e Bis-GMA/CH3Bis-GMA tiveram suas propriedades significantemente alteradas pela incorporação de aditivos (propanal ou diquetona). Os aditivos (propanal/diquetona) não influenciaram de forma significante as propriedades do sistema Bis-GMA/CF3Bis-GMA. O efeito dos aditivos nas propriedades dos materiais analisados relaciona-se à sua abilidade em aumentar o grau de conversão de alguns sistemas resinosos
The purpose of this study was to evaluate the effect of two additives, propionaldehyde (aldehyde) and 2,3-butanedione (diketone), on the properties of Bis-GMA based comonomer, copolymer and composites when diluted with TEGDMA, propoxylated Bis- GMA (CH3Bis-GMA) and propoxylated fluorinated Bis-GMA (CF3Bis-GMA). Experimental comonomer/copolymer/composites were prepared combining Bis-GMA and TEGDMA, CH3Bis-GMA, CF3Bis-GMA, with aldehyde (24 and/or 32 mol%) and diketone (24 and/or 32 mol%). For composites, hybrid treated filler (barium aluminosilicate glass; 60 wt%) was added to monomer mixtures. Photopolymerization was effected by using camphorquinone (0.2 wt%) and N,N-dimethyl-p-toluidine (0.2 wt%). Experimental comonomer/copolymers viscosity, polymerization shrinkage, degree of conversion, contact angle (enamel, dentin and glass surfaces), glass transition temperature (DSC and Fox equation), microhardness, surface roughness changes and wear were evaluated. Experimental composites, flexural strength, modulus of elasticity, diametral tensile strength, modulus of resilience, microhardness, surface roughness changes and wear were also assessed. Bis-GMA/TEGDMA and Bis- GMA/CH3Bis-GMA systems had properties significantly influenced by incorporation of additives (either propanal or diketone). Additives (propanal/diketone) did not significantly influence on Bis-GMA/CF3Bis-GMA system properties. The effect of additives on the evaluated material properties is mainly attributed to their ability in improving some resin systems degree of conversion
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5

Santana, Ivan Jose de. "Modelamento matemático do processo de soldagem GMAW." Universidade Federal de Minas Gerais, 2010. http://hdl.handle.net/1843/BUDB-8DRHR9.

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Анотація:
This thesis describes the development and validation of a mathematical model that describes the electrical and operational behavior of GMA welding. Initially it was developed a static model that was able to simulate welding conditions characterized by small current and tension variation usually found with free-flight metal transfer. Afterwards, a dynamic model capable to simulate abrupt current and voltage changes usually observed in short-circuit welding was developed. These models were based on aset of equations that describes the power source characteristics, the voltage drop along the electric arc and the welding circuit and the energy balance on the wire tip. Despite the large number of variables of GMA welding and the complex relation among them, the results from the models agreed well with data from the literature and to experimentalresults. The dynamic model was able to simulate the welding parameters values (with less 10% of error) and to predict transitions in metal transfer mode. The mean current and voltage and their waveform variation, arc length, short circuit frequency and metal transfer transition were obtained as a function of wire feed rate, contact tip-to-work distance and open circuit voltage. The results indicate that the developed models,specially the dynamic one, are able to estimate welding parameters for specific welding conditions and can contribute to a more fundamental understanding of this welding process.
Este trabalho descreve o desenvolvimento e validação de modelos matemáticos elaborados para simular o processo de soldagem GMAW, particularmente em seus aspectos elétricos e operacionais. Inicialmente, foi desenvolvido um modelo capaz de simular o processo sem grandes variações de corrente e tensão (definido, neste trabalho,como modelo estático), como por exemplo, com o processo operando em transferência metálica por vôo livre. Na sequência, foi desenvolvido um novo modelo (definido como dinâmico), que de forma mais abrangente simula, também, o processo frente a variações bruscas de corrente e tensão, um exemplo seria, quando o processo opera comtransferência metálica por curtos-circuitos. Estes modelos foram baseados em um conjunto de equações, que descrevem as características operacionais da fonte de energia, as quedas de tensão que ocorrem no arco elétrico e nos componentes do circuito de soldagem, e em um balanço de energia na ponta do arame. De uma forma geral, e levando-se em conta o grande número de variáveis envolvidas e a complexa inter-relação entre estas, os parâmetros simulados pelos modelos quando comparados com dados experimentais provenientes de testes de soldagem (deposição de cordão sobre chapa) e dados obtidos da literatura apresentaram bons resultados. O modelo dinâmico, por exemplo, foi capaz de simular com erros inferiores a 10% o comportamento de diferentes parâmetros do processo, assim como a transição de modos de transferência metálica. Os parâmetros e os aspectos do processo, que foram analisados, incluem, por exemplo, os valores médios de corrente e tensão, assim como seus oscilogramas, o comprimento de arco, a frequência de curtos-circuitos e a mudança de modo de transferência metálica em função da velocidade de alimentação, da distância entre o bico de contato e a peça e da tensão em vazio. Os resultados indicam que os modelos desenvolvidos, sobretudo o dinâmico, sejam capazes de facilitar o entendimento fundamental deste processo e determinar de maneira mais conveniente os parâmetros de soldagem mais adequados para uma situação específica de soldagem.
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6

De, Luca Stefano. "Studio orbitale di missione CubeSat con applicativo GMAT." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Анотація:
La missione per cui questo elaborato è stato redatto è relativa allo studio orbitale di un satellite CubeSat con lo scopo di garantire una navigazione nello spazio autonoma con l’aiuto dei satelliti GPS. E' stata studiata, in particolare, la natura di un nanosatellite, sempre più utilizzato ai giorni nostri per missioni di lancio nello spazio. Si è fatto uso di software quali GMAT e Matlab che hanno permesso di studiare i dati dei sottosistemi di telecomunicazione e di controllo termico utili ai fini della missione.
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7

Quintino, L. "Fusion characteristics in P-GMAW of mild steel." Thesis, Cranfield University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.483022.

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8

Neto, João Teles de Carvalho. "Descrição analítica da magnetização induzida pela metodologia GMAX." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-07092007-035436/.

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Анотація:
A metodologia GMAX, (Gradient-Modulated Adiabatic Excitation), caracteriza-se pelo uso de pulsos adiabáticos para localização de volumes em espectroscopia e seleção de fatias em MRI. A sua utilidade surge do interessante perfil de inversão da magnetização transversal induzido ao longo da amostra. Entretanto, a interpretação desse comportamento tem sido dada apenas de forma qualitativa, através da utilização da condição de adiabaticidade como ponto de partida. Neste trabalho é apresentada uma descrição analítica partindo da solução em termos da função hipergeométrica para os pulsos sech e tanh. A partir desse procedimento encontramos um conjunto de resultados com os quais é possível inferir analiticamente o comportamento característico da magnetização, tendo como objetivo obter um maior controle da magnetização a partir dos parâmetros da metodologia que proporcionam interpretação física.
The Gradient-Modulated Adiabatic Excitation (GMAX) methodology is characterized by the use of adiabatic pulses for volume localization in spectroscopy and slice selection in MRI. Its use derives from the interesting nodal point transverse magnetization profile induced throughout the sample. Nevertheless, the interpretation of such behavior for the magnetization has been of qualitative purpose only, using the adiabatic condition as a starting point. Here, we present an analytical description, starting from the solution in terms of the hypergeometric functions for sech and tanh pulses. From this procedure we found a set of results with which is possible to infer analytically the characteristic behavior of the magnetization. This is on the purpose of obtaining greater control of the magnetization from parameters of the methodology that carry physical interpretation.
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9

Scotti, A. "Process modelling to establish control algorithms for automated GMAW." Thesis, Cranfield University, 1991. http://dspace.lib.cranfield.ac.uk/handle/1826/10518.

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Анотація:
The feasibility of fully automatic GMAW processes may rely on the development of sophisticated equipment to emulate the manual welding torch oscillation pattern or on the development of high level methods of control to prevent the appearance of defects, especially the lack of sidewall fusion. An intermediate solution is to optimise the weaving parameters of a conventional pattern oscillator in such a way as to minimise the level of rejection. A prototype of a computerised system to work with Pulsed-GMAW equipment, in the vertical-up position, was proposed to produce a minimal level of rejection for welds in plates up to 25 mm thick. The system basically consists of optimised mode control algorithms, based on theoretical and experimental models of weld pool behaviour. Three tasks are performed by the system; the selection of parameters for an optimum working point, an off-line simulation of the operation and real-time error monitoring of the process. Statistical experimental modelling was applied in order to build most of the optimised models, because of the large number of variables to be treated and their complex inter-correlation. The welding variables were correlated with single responses. Partial and Correlation Analysis techniques were used to discover the relationship between the variables and the responses. Regression Analysis was then applied as a means of obtaining the 'weight' of the most significant variables. Finally, since some variables were found to be collinear, a corrective technique for biased variables was employed. Acceptance criteria for bead shapes were proposed and assessed. The effect of the oscillation parameters and other welding variables on the bead formation was analyzed and an operational 'envelope' for the parameters determined. A theoretical approach to predict the occurrence of poorly shaped beads, due to the lack of metal bridge between the joint walls, was successfully developed and applied in parallel with the statistical experimental methods. Equations for optimising the bead shape and for determining the operational envelope contours were subsequently generated and evaluated. An extension of the system to an actual adaptive control scheme was discussed and sensors and signals to be used were evaluated. Finally, a process instability phenomenon in long test plates was identified and investigated. This instability may prevent the use of GMA W in some conditions in the vertical-up position.
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Tschirner, Simon. "The GMOC Model : Supporting Development of Systems for Human Control." Doctoral thesis, Uppsala universitet, Avdelningen för visuell information och interaktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-246719.

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Train traffic control is a complex task in a dynamic environment. Different actors have to cooperate to meet strong requirements regarding safety, punctuality, capacity utilization, energy consumption, and more. The GMOC model has been developed and utilized in a number of studies in several different areas. This thesis describes GMOC and uses train traffic control as the application area for evaluating its utility. The GMOC model has its origin in control theory and relates to concepts of dynamic decision making. Human operators in complex, dynamic control environments must have clear goals, reflecting states to reach or to keep a system in. Mental models contain the operator’s knowledge about the task, the process, and the control environment. Systems have to provide observability, means for the operator to observe the system’s states and dynamics, and controllability, allowing the operators to influence the system’s states. GMOC allows us to constructively describe complex environments, focusing on all relevant parts. It can be utilized in user-centred system design to analyse existing systems, and design and evaluate future control systems. Our application of GMOC shows that automation providing clear observability and sufficient controllability is seen as transparent and most helpful. GMOC also helps us to argue for visualization that rather displays the whole complexity of a process than tries to hide it. Our studies in train traffic control show that GMOC is useful to analyse complex work situations. We identified the need to introduce a new control strategy improving the traffic plan by supporting planning ahead. Using GMOC, we designed STEG, an interface implementing this strategy. Improvements that have been done to observability helped the operators to develop more adequate mental models, reducing use of cognitive capacity but increasing precision of the operative traffic plans. In order to improve the traffic controllers’ controllability, one needs to introduce and share a real-time traffic plan, and provide the train drivers with up-to-date information on the surrounding traffic. Our studies indicate that driver advisory systems, including such information, reduce the need for traffic re-planning, improve energy consumption, and increase quality and capacity of train traffic.
KAJT
FTTS
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Книги з теми "GMAC"

1

Congressional Oversight Panel March oversight report: The unique treatment of GMAC under the TARP. Washington: U.S. G.P.O., 2010.

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GMAC Financial Services and the Troubled Asset Relief Program: Hearing, Congressional Oversight Panel, One Hundred Eleventh Congress, second session, hearing held in Washington, DC, February 25, 2010. Washington: U.S. G.P.O., 2010.

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3

Dulan, Steven W. GMAT. Indianapolis, Ind: Que Certification, 2006.

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4

Kolby, Jeff. GMAT PrepCourse. Los Angeles, CA: Nova Press, 2001.

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5

Goodman, Eric. GMAT 800. 2nd ed. New York: Simon & Schuster, 2005.

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6

Goodman, Eric. GMAT 800. 2nd ed. New York: Kaplan Publishing, 2008.

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7

Kolby, Jeff. GMAT PrepCourse. Los Angeles, CA: Nova Press, 1999.

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8

Goodman, Eric. GMAT 800. 2nd ed. New York: Kaplan, 2007.

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9

GMAT premier. New York: Kaplan Publishing, 2015.

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10

gmax bible. New York: Wiley, 2003.

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Частини книг з теми "GMAC"

1

Preneel, Bart. "GMAC." In Encyclopedia of Cryptography and Security, 513–14. Boston, MA: Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-5906-5_578.

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2

Ma, Lianhang, Hao Huang, Qinming He, Kevin Chiew, Jianan Wu, and Yanzhe Che. "GMAC: A Seed-Insensitive Approach to Local Community Detection." In Data Warehousing and Knowledge Discovery, 297–308. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40131-2_26.

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3

Beitzel, Steven M., Eric C. Jensen, and Ophir Frieder. "GMAP." In Encyclopedia of Database Systems, 1–2. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4899-7993-3_493-2.

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Beitzel, Steven M., Eric C. Jensen, and Ophir Frieder. "GMAP." In Encyclopedia of Database Systems, 1256. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-39940-9_493.

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Beitzel, Steven M., Eric C. Jensen, and Ophir Frieder. "GMAP." In Encyclopedia of Database Systems, 1630–31. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-8265-9_493.

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Sheldrick, Katherine, and Angela Pilling. "GMC Referral." In Medicolegal Issues in Obstetrics and Gynaecology, 37–43. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78683-4_8.

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Ilčev, Stojče Dimov. "Inmarsat GEO GMSC System." In Global Mobile Satellite Communications Applications, 1–100. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71858-3_1.

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Ilčev, Stojče Dimov. "Non-GEO GMSC Systems." In Global Mobile Satellite Communications Applications, 101–201. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71858-3_2.

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Ilčev, Stojče Dimov. "Cospas-Sarsat GMSC System." In Global Mobile Satellite Communications Applications, 305–71. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71858-3_4.

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Mockus, Jonas. "C++ Version (GMC)." In Applied Optimization, 63–73. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4671-9_6.

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Тези доповідей конференцій з теми "GMAC"

1

Padakandla, Arun, and Rajesh Sundaresan. "Complexity of scheduling for minimum power on a GMAC." In 2008 IEEE International Symposium on Information Theory - ISIT. IEEE, 2008. http://dx.doi.org/10.1109/isit.2008.4595482.

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Lu, Yang, Guochu Shou, Yihong Hu, and Zhigang Guo. "The Research and Efficient FPGA Implementation of Ghash Core for GMAC." In 2009 International Conference on E-Business and Information System Security (EBISS). IEEE, 2009. http://dx.doi.org/10.1109/ebiss.2009.5138125.

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Rowen, Chris, Dan Nicolaescu, Rajiv Ravindran, David Heine, Grant Martin, James Kim, Dror Maydan, et al. "The world's fastest DSP core: Breaking the 100 GMAC/s barrier." In 2011 IEEE Hot Chips 23 Symposium (HCS). IEEE, 2011. http://dx.doi.org/10.1109/hotchips.2011.7477497.

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Benmansour, Tariq, and Samira Moussaoui. "GMAC: Group mobility adaptive clustering scheme for Mobile Wireless Sensor Networks." In 2011 10th International Symposium on Programming and Systems (ISPS). IEEE, 2011. http://dx.doi.org/10.1109/isps.2011.5898886.

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Lessmann, Johannes. "GMAC: A Position-Based Energy-Efficient QoS TDMA MAC for Ad Hoc Networks." In 2007 15th IEEE International Conference on Networks. IEEE, 2007. http://dx.doi.org/10.1109/icon.2007.4444128.

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Ji, Chaoxin. "Study on Profiting Model of Auto Finance Companies-Taking SAIC-GMAC as an Example." In 2017 International Conference on Innovations in Economic Management and Social Science (IEMSS 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/iemss-17.2017.108.

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Pladdy, Christopher, and Robert M. Taylor. "Iterative Semi-Blind Blue Estimation of Channel State Information for the Asynchronous GMAC with Memory." In 2007 IEEE/SP 14th Workshop on Statistical Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/ssp.2007.4301308.

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8

Pladdy, Christopher, and Robert M. Taylor. "Joint data detection and channel estimation for two dominant users in the asynchronous GMAC with memory." In MILCOM 2008 - 2008 IEEE Military Communications Conference (MILCOM). IEEE, 2008. http://dx.doi.org/10.1109/milcom.2008.4753270.

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9

Yahampath, Pradeepa. "An Extension to Source-Channel Coding of Correlated Gaussian Sources for a Fading GMAC Using TCVQ." In 2022 17th Canadian Workshop on Information Theory (CWIT). IEEE, 2022. http://dx.doi.org/10.1109/cwit55308.2022.9817670.

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Woodward, N. J., D. Yapp, S. Blackman, I. M. Richardson, D. Widgery, M. A. P. Armstrong, R. L. P. Verley, and J. O. Berge. "Diverless Underwater GMA Welding for Pipeline Repair Using a Fillet Welded Sleeve." In 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0630.

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The hyperbaric GMA welding procedure development carried out for underwater pipeline repair using a fillet welded sleeve is described. The fillet welded sleeve for repair offers greater alignment and installation tolerances than those associated with V-butt welding. In comparison with the hyperbaric TIG process, currently operated offshore with diver-assistance, GMA welding offers a relatively high deposition rate and is well suited to fillet joints. Parameter development enabling the stable deposition necessary for a large fillet weld is described, in addition to the repeatability of the weld quality and results from material property testing. Positional linear fillet welding work has been performed on API 5L X65 pipeline and sleeve material, using a specially developed metal-cored wire at an initial target depth of 360m. Previous work has demonstrated the robust nature of the hyperbaric GMAW process, with results produced at water depths down to 2,500m. The procedure development forms part of the Remote PRS programme, designing, building and testing a diverless underwater hyperbaric GMA welding repair spread, to be operated fully remotely.
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Звіти організацій з теми "GMAC"

1

Housley, R. Using the AES-GMAC Algorithm with the Cryptographic Message Syntax (CMS). RFC Editor, June 2021. http://dx.doi.org/10.17487/rfc9044.

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2

McGrew, D., and J. Viega. The Use of Galois Message Authentication Code (GMAC) in IPsec ESP and AH. RFC Editor, May 2006. http://dx.doi.org/10.17487/rfc4543.

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Grubbs, Daniel. GMLC 1.2.3 Catalog - Sandia National Laboratories. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1398236.

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Disa, R., C. Van Wie, K. Arnold, J. Altemueller, and A. Whelan. Geometric Modeling Applications Interface Programs (GMAP). GMAP/PDDI system Component Product Specification (as Built). Volume 1. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada228114.

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Disa, R., C. Van Wie, K. Arnold, J. Altemueller, and A. Whelan. Geometric Modeling Applications Interface Programs (GMAP). GMAP/PDDI system Component Product Specification (as Built). Volume 2. Schema Manager Listing. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada228115.

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6

FUERSCHBACH, PHILLIP W., D. L. LUCK, LEE A. BERTRAM, and ROBERT A. ANDERSON. Laser Assisted Micro Wire GMAW and Droplet Welding. Office of Scientific and Technical Information (OSTI), March 2002. http://dx.doi.org/10.2172/793350.

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7

Reutzel, Edward W., Ludwig Kern, Michael J. Sullivan, Jay F. Tressler, and Juan Avalos. Laser-GMA Hybrid Pipe Welding System. Fort Belvoir, VA: Defense Technical Information Center, November 2007. http://dx.doi.org/10.21236/ada477283.

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8

Zhu, J., and S. Kanugovi. Generic Multi-Access (GMA) Encapsulation Protocol. RFC Editor, February 2022. http://dx.doi.org/10.17487/rfc9188.

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Heald, P. R., R. B. Madigan, T. A. Siewert, and S. Liu. Droplet transfer modes for a MIL 100S-1 GMAW electrode. Gaithersburg, MD: National Institute of Standards and Technology, 1991. http://dx.doi.org/10.6028/nist.ir.3976.

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10

Phillips, L., K. Perlotto, D. K. Emmerson, P. Blasko, and D. Jacobs. Geometric Modeling Applications Interface Program (GMAP). Volume 1. Executive Overview. Fort Belvoir, VA: Defense Technical Information Center, September 1989. http://dx.doi.org/10.21236/ada237280.

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