267 research outputs found
The Validity Of "TDS-DTM": A Strategic Methodology Of Merchandise Development Of New JIT-Key To The Excellence Design LEXUS
No full textRecently, the author has touched on the development of the principle of New JIT and its validity. In this paper, the author presents TDS-DTM (Toyota Development System-Design Technical Methods) as a methodology of New JIT, which contributes to strategic product development. The excellence profile design of LEXUS has achieved by TDS-DTM
Political Satire and Political News: Entertaining, Accidentally Reporting or Both? The Case of The Daily Show with Jon Stewart (TDS)
No full textFor the last decade, The Daily Show with Jon Stewart (TDS), a (Comedy Central) cable comedy show, has been increasingly seen as an informative, new, even revolutionary, form of journalism. A substantial body of literature appeared, adopting this view. On closer inspection, it became clear that this view was tenable only in specific circumstances. It assumed that the comedic structure of the show, TDS' primary text, promoted cognitive polysemy, a textual ambiguity which encouraged critical inquiry, and that TDS' audiences perceived it accordingly. As a result I analyzed, through a dual - encoding/decoding - analytical approach, whether TDS' comedic discourse educates and informs its audiences in a manner which encourages independent or critical reading of the news. Through a multilayered textual analysis of the primary and tertiary texts of the show, the research presented here asked, "How does TDS' comedic narrative (primary text) work as a vehicle of televised political news?" and "How does TDS' audience decode its text?" The research identified flaws in the existing literature and the limits inherent to any similar endeavors. It became apparent that, due to TDS' comedic discourse and its host's political transparency, the primary text does not promote cognitive polysemy, because it offers one dominant reading that is easily deciphered. Furthermore, due to its specific comedic structure, the primary text does not encourage dissenting or critical reading of the show's presentation of the news. Close reading of specific audience-authored tertiary texts indicated that TDS offered a dominant encoded reading which was either easily accepted or slightly negotiated, according to the views of the news outlet presenting the TDS excerpt
TDS Measurement of Hydrogen Released from Stainless Steel Oxidized in H2O-Containing Atmospheres
No full textHydrogen dissolved in the Cr2O3 scale formed on the stainless steel in the H2O-containing atmospheres is observed by TDS (thermal desorption spectroscopy) measurements. The amount of dissolved hydrogen in the Cr2O3 scale reaches a maximum about 0.32 mol% when the H2O concentration in the gas reaches 20%. It was found from GDS (glow discharge spectroscopy) measurements that hydrogen may exist at the oxide scale / substrate interface or in Cr2O3 scale bounded that interface. However, results from the Vickers hardness and the observation of scale morphology by SEM (scanning electron microscopy), hydrogen dissolved in the Cr2O3 scale would have little effect on a decrease in the mechanical property of the Cr2O3 scale. Therefore, hydrogen dissolved in the Cr2O3 scale may not be main factor of the deterioration of the Cr2O3 scale
Hydrogen-as-a-probe applied to investigate the influence of extraction and preparation methods on TDS spectra of 13CrMo4-5 samples
No full textPublisher Copyright: © The Author(s) 2024.Thermal desorption spectroscopy (TDS) provides rich information on the desorbed hydrogen flow rate activated at different heat energy levels, supporting high-resolution assessment of small-scale features that are preferential trapping sites. TDS spectra are also highly sensitive to hydrogen uptake from the sample’s extraction and preparation methods, whose influence requires further evaluation. In this research, hydrogen-as-a-probe is applied to evaluate the influence of extraction, surface grinding, dwelling time, plate thickness, and sample thickness on TDS spectra of 13CrMo4-5 steel. Validation of TDS results confirms that all hydrogen present in the sample before the TDS measurement, including metallurgical hydrogen and hydrogen uptake from the studied methods, is desorbed during the first heating cycle. Results indicate that peaks 1 and 3 are negligibly influenced by the studied methods. Peak 2 and total hydrogen concentration are significantly influenced by sample extraction and surface grinding methods, which provide the main outcomes of this work. Methods based on severe solid-state distortion, like machine cutting and grit P320, present an increased total hydrogen content of 99% and 142%, respectively. Dwelling time and plate thickness have small influence on hydrogen content. Reducing the sample thickness results in less total hydrogen concentration at a rate of 5.7 at.ppm/mm.Peer reviewe
Comparison between temporal dominance of sensations (TDS) and key-attribute sensory profiling for evaluating solid food with contrasting textural layers: Fish sticks
No full textThis study compared the performance of two sensory description methods, Temporal Dominance of Sensations (TDS) and key-attribute sensory profiling, in order to assess the sensory attributes of fish sticks (two different commercial brands) cooked by three different procedures (deep frying, conventional oven and microwaving).The TDS method has scarcely ever been applied to solid food and battered fish sticks are a particularly challenging case for sensory assessment, as the presence of contrasting texture layers complicates the description and evaluation of their attributes. The results of the TDS (untrained panellists) and key-attribute sensory profiling (trained panellists) methods were compared by Canonical Variates Analysis (CVA). Both methods gave similar results for the different samples. However, TDS made it possible to monitor the appearance and evolution of the different attributes over the consumption time, with the additional advantage of requiring practically no training.The authors are grateful to the Ministry of Science and Innovation (Spain) for financial support (AGL2009-12785-C02-01), to the Ministry of Education (Spain) for the grant awarded to the author Ángela Albert, and to Mary Georgina Hardinge for her assistance with the English-language manuscript
Absorption and polarization effects of terahertz waves on clinochlore.
No full textO uso da técnica de THz-TDS tem se mostrado essencial para o estudo das vibrações coletivas da rede cristalina dos sólidos na região do THz. O THz-TDS oferece uma abordagem poderosa ao fornecer informações sobre amplitude e fase do espectro de transmissão. Estudar minerais com a habilidade de serem exfoliados, como o clinocloro, está em destaque por se apresentarem como fontes baratas de materiais bidimensionais. Nesta dissertação, foram exploradas as propriedades do clinocloro na região do THz por meio da técnica THz-TDS. Foi observado um padrão de absorção distintivo em 1,13 THz, o que indica a interação entre o mineral e a radiação THz. Comparando com estudos anteriores, a absorção do clinocloro difere de uma variação sua, a serafinita, provavelmente devido a diferenças nas condições geológicas de formação. Foi constatada também a birrefringência do clinocloro, revelando suas propriedades anisotrópicas e a presença de atividade óptica quiral no clinocloro. Sem a aplicação de um campo magnético externo, a amostra apresentou rotação de Faraday e elipticidade no sinal THz transmitido, indicando sua capacidade de alterar a polarização da luz. Essa característica está relacionada à estrutura cristalina e à presença de impurezas e defeitos, que induzem os fônons a se tornarem circularmente polarizados.The use of THz-TDS technique has proven to be essential for studying the collective vibrations of the crystalline lattice in solids in the THz range. THz-TDS offers a powerful approach by providing information about the amplitude and phase of the transmission spectrum. The study of minerals with the ability to be exfoliated, such as clinochlore, is highlighted as a low-cost source of two-dimensional material. In this dissertation, the properties of clinochlore in the THz region were investigated using the THz-TDS technique. A distinct absorption pattern was observed at 1.13 THz, indicating the interaction between the mineral and THz radiation. Comparisons with previous studies revealed differences in absorption between clinocloro and serafinite, probably due to variations in geological formation conditions. Furthermore, the presence of birrefringence in clinochlore was confirmed, revealing its anisotropic properties and the existence of chiral optical activity. Without the application of an external magnetic field, the sample exhibited Faraday rotation and ellipticity in the transmitted THz signal, indicating its ability to modify the polarization of light. This characteristic is associated with the crystal structure and the presence of impurities and defects that induce circular polarization of phonons
Demanda por transporte rodoviário urbano: um modelo computacional baseado em agentes
No full textTCC (Graduação) - Universidade Federal de Santa Catarina. Centro Socioeconômico. Curso de Graduação em Ciências Econômicas.O presente trabalho tem por objetivo elaborar um modelo computacional baseado em agentes aplicado à demanda por transporte rodoviário urbano em via única, de maneira a captar algumas características presentes no deslocamento diário de pessoas continente-ilha na cidade de Florianópolis. É proposto um modelo composto por agentes que se deparam com duas estratégias de modal de transporte ( carro ou ônibus) e duas estratégias de horário de saída. A escolha dos agentes é dada por um modelo de escolha discreta com externalidades de rede, no qual a decisão de cada um influencia a utilidade dos demais. A implementação computacional do modelo é feita através do programa Netlogo. Os resultados indicam a predominância do termo determinístico na escolha dos agentes e a convergência ao equilíbrio após poucas rodadas de interação
Power Grid Simulation with GPU-Accelerated Iterative Solvers and Preconditioners
No full textThis thesis deals with two research problems. The first research problem is motivated by the numerical computation involved in the Time Domain Simulation (TDS) of Power Grids. Due to the ever growing size and complexity of Power Grids such as the China National Grid, accelerating TDS has become a stringent need for the online analysis of these large systems. Hence the first part of the research includes the acceleration of the TDS by means of Iterative Solvers and Preconditioners which exploit the sparsity structure of the Power Grid. The second research problem is motivated by the recent trend of using Graphics Processing Units (GPUs) in High Performance Computing (HPC). By using TDS as a sample application, the second part of research involves the design and implementation of Krylov subspace solvers and general-purpose preconditioner which can fully exploit the performance potential of GPUs. TDS is of crucial importance to the analysis and control of Power Grids. The mathematical model of the Power Grid can be represented by a series of nonlinear Differential Algebraic Equations. With numerical time integration by an implicit scheme and linearization by Newton's Method, the major computation in TDS is the solution of a series of Jacobian matrices based linear systems. With the large size of the Power Grid and the need for fast simulation for online analysis, it is desirable to use iterative solvers and preconditioners for the solution of these linear systems. This thesis tackles the numerical problem in TDS from two aspects: design of high-performance preconditioner to the specific characterization of the TDS problem, and development of multi-step techniques for the iterative solution of a series of linear systems based on the Jacobian matrices. We start with the analysis of the sparsity pattern of the Jacobian matrix and its relationship to the Power Network and admittance matrix. The parts in the Jacobian matrix which corresponds to the dynamic parts (i.e., the differential equations) of the Power Grid and has a block-diagonal form. The Schur complement of the dynamic part has virtually no fill-in in the algebraic part which corresponds to the connectivity of the buses in the Power Network. We then formulate a multilevel preconditioner for the Jacobian matrix based on the static sparsity pattern in the matrix and the analysis of the network topology. We show that multilevel structure based on independent sets (\INDSET) can serve as an efficient preconditioners for TDS in terms of both memory efficiency and convergence property. To accommodate matrix and right hand side changes during the simulation, we further transform the Jacobian matrix in an additive form of , where is a static matrix and is a block-diagonal, low rank matrix which changes from linear system to linear system. Based on this transformation, effective preconditioner re-use, also called preconditioner updating, is derived, through dynamically adopting the changes of into the preconditioner initially constructed for itself. This results in much more efficient iterative methods for TDS of Power Grid. Furthermore, we explore the potential of matrix spectral deflation as another multi-step technique for TDS. To accommodate dynamic changes in the linear operator, \GCRODR is used. With the additive form of , we achieve a more computationally feasible form for the updates of the deflation matrices in \GCRODR. Spectral analysis shows that eigenvalues of both large and very small magnitude appear for the preconditioned TDS matrices, hence we propose the use of a heuristics to dynamically choose among the largest and smallest eigenvalues (or Rits values) used for deflation. The experiments show that the dynamic eigenvalue choice could greatly benefit convergence due to the dynamic changes in the matrix spectra of TDS. We also show that preconditioner updates and deflation can be used together which leads to a combined effect on the reduction of the total iteration count in TDS. GPU based accelerated HPC systems are becoming popular due to the high performance potential and good efficiency of GPUs. Iterative Algorithm and Preconditioners are the two fundamental components of Krylov subspace solvers. However, porting them to GPU platform remain a challenge especially for preconditioners. In this thesis we target at porting of Krylov subspace solvers on GPU and the design of GPU-efficient preconditioners. Firstly we discuss the two major parts of computation involved in Krylov solvers: (1) the generation of Krylov subspace basis through Sparse Matrix-Vector multiplications (\SpMV), and (2) orthogonalization by modified Gram-Schmidt method. We show that both parts can be efficiently implemented on GPU with high performance. On GPU platform, incomplete factorization based preconditioners, such as Incomplete LU or Incomplete Cholesky, have not been successfully implemented due to the ``sequentialness" and limited parallelism in their preconditioning process. While inverse form based preconditioner such as -biconjugate allows higher parallelism and better performance on GPUs, it introduces too much fill-ins. We aim to design a preconditioner that can achieve high performance while maintaining good memory efficiency and convergence property of the incomplete factorizations. We use recursive multilevel structure retrieved from the elimination tree and -biconjugate algorithm to achieve this. Multilevel structure is constructed based on \INDSET{s} by symbolic analysis of the elimination tree. For the preconditioning of the last-level reduced system, we use -biconjugation. The proposed preconditioner, denoted as \MLAINV, features preconditioning operation which involve a series of matrix-vector products. Through experiments with TDS problems and test matrices from various other applications, we show that \MLAINV achieves the design goal in both aspects: (1) its good convergence property is similar to incomplete factorizations, and (2) it obtains high performance by \SpMV based preconditioning on GPUs.Delft Institute of Applied MathematicsElectrical Engineering, Mathematics and Computer Scienc
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The Validity of the Telic Dominance Scale
No full textThe Telic Dominance Scale (TDS) is a 42 item pencil and paper psychometric instrument intended to measure the extent to which a person is seriousminded, planning orientated, arousal avoiding and telic or paratelic dominant.
Using test related reliability methods, this study demonstrates that the TDS is a reliable instrument over a variety of time intervals up to one year.
Reviewing a variety of studies, including a number in which the author was the sole or a collaborative researcher, it is suggested that the TDS is a valid instrument in the sense in which 'validity ' is used in the psychometric tradition. Some doubts concerning the phenomenological grounding of the TDS are examined in the context of a multi-method validation study.
Using a principal components analysis with varimax rotation, a factor analysis of TDS responses suggests that the factor structure of responses does not match the structure implied in the sub-scale structure in the TDS. The implications of this finding are fully discussed
TDS-Metingen aan Hafniumnitride met een hoge Defectconcentratie
No full textTechnische MateriaalwetenschappenMechanical, Maritime and Materials Engineerin
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