Relevant bibliographies by topics / VAR-X model

Contents

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

Academic literature on the topic 'VAR-X model'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "VAR-X model"

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Ibom, L. A., B. Okon, A. Dauda, and I. Patani. "Variations in reproductive and egg traits correlation estimates of two strains of Archachatina marginata snails (var. ovum and var. saturalis) and crosses." Nigerian Journal of Animal Production 45, no. 1 (2020): 26–36. http://dx.doi.org/10.51791/njap.v45i1.358.

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A study was conducted to ariations in the reproductive traits and egg traitscorrelation estimates of the two strains of Archachatina marginata snails (var. ovum and var. saturalis) and their crosses. Ninety sexually mature A. marginata snails, forty-five each of the two strains (var. saturalis and var. ovum) were selected from a base population for the study. he live weight of the snails ranged from 256.43 – 566.25 g for both strains. Selection of the snails was based on active appearance and lack of injury on the foot and on shells. The snails were randomly allotted into three mating models (
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Bonga-Bonga, Lumengo. "Testing For The Purchasing Power Parity Hypothesis In A Small Open Economy: A VAR-X Approach." International Business & Economics Research Journal (IBER) 10, no. 12 (2011): 97. http://dx.doi.org/10.19030/iber.v10i12.6653.

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This paper tests the purchasing power parity (PPP) hypothesis for the rand-US dollar exchange rate by making use of the cointegrating VAR-X approach. Given that the test of PPP hypothesis conducted in this paper involves variables of a small economy, South Africa, compared to a big economy, the US, the paper contends that traditional cointegrating VAR approach that considers all variables in a given vector as endogenous is not suitable. The results of the paper show that the restriction applied in the cointegrating vector for the VAR-X model supports the weak-form PPP hypothesis. The same rest
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Hasnita and Hilma Mutiara Winata. "PENGARUH HARGA BROILER DAN HARGA JAGUNG TERHADAP HARGA KARKAS DENGAN PENAMBAHAN CALENDAR EFFECTS MENGGUNAKAN METODE VECM-X." Journal of Social and Economics Research 6, no. 1 (2024): 2086–97. http://dx.doi.org/10.54783/jser.v6i1.508.

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Tujuan dari penelitian ini adalah untuk mengetahui pengaruh harga broiler dan harga jagung terhadap harga karkas dengan menerapkan analisis Vector Autoregressive (VAR) serta menerapkan metode VAR dengan ditambahkan calendar effects (VAR-X) dan jika data tidak stasioner pada level dan terdapat kointegrasi maka digunakan vector error correction model (VECM-X). Hal ini didasarkan pula pada pertimbangan untuk melihat apakah ada perbedaan harga ketika terdapat kejadian hari raya tertentu dan hari biasa. Hasil analisis dengan VECM pada lag 13 untuk harga karkas menyatakan bahwa terdapat beberapa hub
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NAIT, BOUZID KHALIL. "The COVID-19's Spillover Effects on Industry Indices Returns: Evidence from Casablanca Stock Exchange." African Scientific Journal Vol 3, N° 4 (2021): 505. https://doi.org/10.5281/zenodo.5642857.

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<strong>R&eacute;sum&eacute; </strong> Cette &eacute;tude examine la r&eacute;action de la Bourse de Casablanca au COVID-19 en consid&eacute;rant plus particuli&egrave;rement l&#39;effet d&#39;entra&icirc;nement des cas et des d&eacute;c&egrave;s li&eacute;s au COVID-19 dans cinq pays s&eacute;lectionn&eacute;s affect&eacute;s par le COVID-19, dont le Maroc, sur les rendements des indices industriels de la Bourse de Casablanca du 13 juin 2019 au 11 juin 2020. Cette &eacute;tude utilise le &quot;mod&egrave;le VAR-X&quot; (mod&egrave;les VAR avec des variables exog&egrave;nes) &agrave; cette fin
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Wang, Pinqiang, Mengbin Zhu, Yan Chen, and Weimin Zhang. "Implicit Equal-Weights Variational Particle Smoother." Atmosphere 11, no. 4 (2020): 338. http://dx.doi.org/10.3390/atmos11040338.

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Under the motivation of the great success of four-dimensional variational (4D-Var) data assimilation methods and the advantages of ensemble methods (e.g., Ensemble Kalman Filters and Particle Filters) in numerical weather prediction systems, we introduce the implicit equal-weights particle filter scheme in the weak constraint 4D-Var framework which avoids the filter degeneracy through implicit sampling in high-dimensional situations. The new variational particle smoother (varPS) method has been tested and explored using the Lorenz96 model with dimensions N x = 40 , N x = 100 , N x = 250 , and
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Lei, Yu, Danning Zhao, and Min Guo. "Medium- and Long-Term Prediction of Polar Motion Using Weighted Least Squares Extrapolation and Vector Autoregressive Modeling." Artificial Satellites 58, no. 2 (2023): 42–55. http://dx.doi.org/10.2478/arsa-2023-0004.

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ABSTRACT This article presents the application of weighted least squares (WLS) extrapolation and vector autoregressive (VAR) modeling in polar motion prediction. A piecewise weighting function is developed for the least squares (LS) adjustment in consideration of the effect of intervals between observation and prediction epochs on WLS extrapolation. Furthermore, the VAR technique is used to simultaneously model and predict the residuals of x p, y p pole coordinates for WLS misfit. The simultaneous predictions of x p, y p pole coordinates are subsequently computed by the combination of WLS extr
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Espinosa Acuña, Oscar Andrés, and Paola Andrea Vaca González. "Causes of unemployment in Colombia during the XXI century Evidence from a Cointegrated VAR-X model." Revista de Economía del Caribe 14 (July 1, 2014): 90–114. http://dx.doi.org/10.14482/ecoca.14.5972.

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Rosyidah, Hanifia, Di Asih I. Maruddani, and Diah Safitri. "ANALISIS BACKTESTING UNTUK VALUE AT RISK METODE EKSPANSI CORNISH-FISHER DENGAN UJI KUPIEC." Jurnal Gaussian 13, no. 2 (2024): 405–14. https://doi.org/10.14710/j.gauss.13.2.405-414.

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Returns and risks are important to pay attention before investing. Value at Risk (VaR) is a tool for measuring risk. VaR measures the worst-case loss at a certain level of confidence. Methodology and return distribution assumptions are important in estimating VaR. The classic VaR method can only be used for normally distributed returns. Cornish-Fisher Expansion (CFE) VaR doesn’t require distributional assumptions. VaR CFE takes into account skewness and kurtosis. The Covid-19 pandemic had a negative impact, but several companies still carrying out Initial Public Offerings (IPO). This research
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Espinosa Acuña, Oscar Andrés, and Paola Andrea Vaca González. "Causas del desempleo en Colombia en el siglo XXI. Evidencia a partir de un modelo VAR-X cointegrado." Revista de Economía del Caribe, no. 14 (June 30, 2022): 90–114. http://dx.doi.org/10.14482/ecoca.14.338.542.

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Este artículo presenta los resultados de una investigación acerca de los posibles determinantes del desempleo en Colombia en el siglo XXI, mediante un modelo VAR-X cointegrado. El análisis de cointegración evidencia estadísticamente una relación de largo plazo entre las variables términos de intercambio, ventas reales, productividad laboral, empleo, salarios reales y desempleo. Al estimar el modelo y desarrollar el análisis de impulso respuesta, se concluye que las ventas reales son un factor importante para el desempleo en el corto plazo, como la productividad lo es en gran medida para el med
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Phan, X. V., L. Ferro-Famil, M. Gay, et al. "1D-Var multilayer assimilation of X-band SAR data into a detailed snowpack model." Cryosphere 8, no. 5 (2014): 1975–87. http://dx.doi.org/10.5194/tc-8-1975-2014.

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Abstract. The structure and physical properties of a snowpack and their temporal evolution may be simulated using meteorological data and a snow metamorphism model. Such an approach may meet limitations related to potential divergences and accumulated errors, to a limited spatial resolution, to wind or topography-induced local modulations of the physical properties of a snow cover, etc. Exogenous data are then required in order to constrain the simulator and improve its performance over time. Synthetic-aperture radars (SARs) and, in particular, recent sensors provide reflectivity maps of snow-
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Dissertations / Theses on the topic "VAR-X model"

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Campideli, Thaiza da Silva. "Sensibilidade de valores gen?ticos de til?pias do Nilo, variedade tailandesa, aos n?veis de lisina digest?vel das dietas." UFVJM, 2017. http://acervo.ufvjm.edu.br/jspui/handle/1/1567.

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Incluir como ag?ncias financiadoras: Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG), Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES), Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq).<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-01-05T18:15:19Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) thaiza_silva_campideli.pdf: 3972827 bytes, checksum: d46dcbd4e39c922c90034d3992c8ad54 (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.e
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Straka, Martin. "Výpočtové modelování vysokofrekvenčního hluku v kabině letounu EV-55M." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230560.

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This thesis describes methods of high frequency noise and vibrations computation of cabin part of EV–55M (aircraft developed by Evektor Kunovice). There is a brief summary of methods used for determining high frequency noise and vibrations in the first part of the thesis. Detailed explanation is given for Statistical Energy Analysis (SEA) which is nowadays the most dominant method in this area. The energy balance equation is derived in this chapter and SEA parameters such as modal density, damping loss factor, coupling loss factor and power input are introduced here. Next part deals with main
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Lu, W. N., and 盧威年. "van Hove Singularity Model and Dopant dependence of Tc(x) and dTc (x)/dP in YBa2Cu3Ox (6.4." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/88330805729459853585.

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碩士<br>國立交通大學<br>電子物理學系<br>82<br>This study is proposed to understand the superconducting state of the cuprate superconductor YBa2Cu3Ox and the scenario of the van Hove singularity model. First, we study the picture drawn by van Hove singularity model. We simplify the CuO2 plane in YBa2Cu3Ox (6.4<x<7) to be a square lattice and use the dispersion relation estimated by the tight- binding method to calculate the density of state. Second, we use the BCS theorem associated
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Rossum, Daniël R. van [Verfasser]. "Massive NLTE models for X-ray novae with PHOENIX / vorgelegt von Daniël R. van Rossum." 2009. http://d-nb.info/1002075734/34.

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Meyer, Ettienne. "Electronic data interchange : an implementation methodology." Diss., 1995. http://hdl.handle.net/10500/17443.

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The purpose of the research is to propose and evaluate a methodology for implementing EDI to assist organisations in reaping the anticipated benefits. The research involved the systematic analysis of the state of the art of EDI and paradigms of methodologies, to define a model for the EDI implementation methodology, and to define criteria for evaluating such a model. The methodology was developed and modelled utilising the software process model, as adopted by Boehm (1988) and later duPlessis and van der Walt (1992), as a framework. Next a synthesis of the assimilated knowledge and b
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Books on the topic "VAR-X model"

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Rocha, Katia, and Naielly Lopes Marques. Texto para Discussão 3102. Instituto de Pesquisa Econômica Aplicada (Ipea), 2025. https://doi.org/10.38116/td3102-port.

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A Agência Nacional de Transportes Terrestres (ANTT) do Brasil lançou, no final de 2022, audiência pública sobre um novo modelo de compartilhamento de riscos de demanda/receita nos contratos de concessão de infraestrutura rodoviária. Este Texto para Discussão ilustra, a partir da metodologia de opções reais, como o mecanismo modifica as estruturas de risco x retorno da concessão e influencia a decisão de investimento na concessão e potenciais deságios tarifários, entendidos como o prêmio da opção devido aos mecanismos de compartilhamento de risco com o poder concedente, seguindo determinadas re
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Book chapters on the topic "VAR-X model"

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Franses, Philip Hans. "Periodic Cointegration." In Periodicity and Stochastic Trends In Economic Time Series. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780198774532.003.0009.

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Abstract This chapter deals with empirical periodic models for multivariate time series with one or more stochastic trends. In the previous two chapters we have seen that for univariate variables periodic time series models are most easily analysed in the vector of quarters (VQ) form. This amounts to investigating the properties of a quarterly observed time series y1via an analysis of the properties of the (4 x 1) vector process YT ‘ which contains the observations in each of the quarters. As noted in Section 7.5, the analysis of the stationarity property of a periodic VAR (PVAR) model can be
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Tuomala, Matti. "Mirrleesian Optimal Non-linear Income Tax Model." In Optimal Income Tax and Redistribution. Oxford University PressOxford, 1990. http://dx.doi.org/10.1093/oso/9780198286059.003.0006.

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Abstract There are two commodities in this model, a composite consumption good, x, and labour service, y, for example, the time spent at work. All individuals have the same preference ordering, which is represented by a cardinal utility function u(x,y). The market buys efficiency labour, not labour time itself, and individuals although they are identical in preferences vary in their productivity ability to supply labour. Every individual possesses a specific ability (=marginal productivity) n. Ability is distributed in the population according to the density function f(n).
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Martin, Bernhard, and Svetlozar T. Rachev. "A Stable Cointegrated Var Model for Credit Returns with Time-Varying Volatility." In Modeling and Control of Economic Systems 2001. Elsevier, 2003. http://dx.doi.org/10.1016/b978-008043858-0/50036-x.

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Buldakov M.A. and Cherepanov V.N. "Asymptotic model of exchange interactions for polarizability calculation of van der Waals complexes." In Atomic and Molecular Nonlinear Optics: Theory, Experiment and Computation. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-742-0-71.

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The asymptotic model of exchange interactions for calculation of the polarizability of van der Waals complexes is discussed. The model is employed for description of the polarizability of interacting systems when their valence electron shells are weakly overlapped. The analytical expressions for the interaction polarizabilities that include induction, dispersion and exchange contributions have been obtained for X-Y and X-Y2complexes. The calculation of the interaction polarizabilities of the complexes He-He, Ar-Ar, Kr-Xe, Xe-Xe, and Ar-H2have been carried out.
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Pennings, Sari, Timothy E. O’Neill, Geert Meersseman,, and E. Morton Bradbury. "Nucleosomes: dynamic repressors of transcription." In Nuclear Organization, Chromatin Structure, and Gene Expression. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198549239.003.0001.

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Abstract The structure of the nucleosome, which was elucidated from early work on enzyme digestion patterns, neutron scatter, X-ray diffraction data, and histone— DNA crosslinking (reviewed by Van Bolde 1988), is essentially a static picture of an average structure. This is because these experimental approaches average out the heterogeneities across the largely native bulk nucleosome and chromatin samples, as well as any fluctuations in the structure over time. Most notably, the model of the nucleosome rarely includes the long N-terminal and short C-terminal ‘tails’ of the histones, which are
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Tuomala, Matti. "Optimal Redistribution in the Two—Class Economy." In Optimal Income Tax and Redistribution. Oxford University PressOxford, 1990. http://dx.doi.org/10.1093/oso/9780198286059.003.0004.

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Abstract Some of the basic issues of the optimal income tax problem can be illustrated in the context of a simple model of an economy in which there are only two types of individual, labelled 1 and 2, and a single produced commodity. Individuals are regarded as identical except that they vary in their ability to supply labour. The ith individual obtains utility from consumption goods: x, and disutility from the time spent at work, y, i = 1, 2, (4.1)
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Nazhat Yahya and Airey David. "Applications of high speed photography and X-ray computerised tomography (Micro CT) in dynamic compaction tests." In Deformation Characteristics of Geomaterials. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-822-9-421.

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Dynamic compaction is an efficient ground improvement technique for loose granular soils. The improvement is achieved by controlled high energy tamping. Its effects vary with soil properties, energy input and the pattern of treatment. However, the depth and extent of soil improvement are both difficult to predict and to quantify. To provide data on the mechanics of dynamic compaction high speed digital photography coupled with X-ray computerised tomography (Micro CT) and digital image correlation analysis has been used in model compaction tests conducted on dry sand under plane strain conditio
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Atkins, Peter. "4. States of matter." In Physical Chemistry: A Very Short Introduction. Oxford University Press, 2014. http://dx.doi.org/10.1093/actrade/9780199689095.003.0004.

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‘States of matter’ describes the three traditional states — gas, liquid, and solid — and the models used to predict and understand their behaviour. The van der Waals equation of state captures many of the properties of real gases. The classical way of studying the motion of molecules in liquids is to measure its viscosity. Techniques include neutron scattering and nuclear magnetic resonance. X-ray diffraction is used to determine the structures of solids. Intermediate states of matter — where liquid meets gas and liquid meets solid — are also considered. Examples include supercritical fluids,
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Motulsky, Harvey, and Arthur Christopoulos. "Introduction to dose-response curves." In Fitting Models to Biological Data Using Linear and Nonlinear Regression. Oxford University PressNew York, NY, 2004. http://dx.doi.org/10.1093/oso/9780195171792.003.0041.

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Abstract Dose-response curves can be used to plot the results of many kinds of experiments. The X axis plots concentration of a drug or hormone. The Y axis plots response, which could be almost any measure of biological function. For example, the response might be enzyme activity, accumulation of an intracellular second messenger, membrane potential, secretion of a hormone, change in heart rate, or contraction of a muscle. The term “dose” is often used loosely. In its strictest sense, the term only applies to experiments performed with animals or people, where you administer various doses of d
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Deviren, Ayhan. "Mendel ve Mendel Dışı Kalıtım." In Temel Genetik. İstanbul Üniversitesi–Cerrahpaşa Üniversite Yayınevi, 2024. http://dx.doi.org/10.5152/7209.

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Genetik bozukluklar arasında tek genle kalıtılanlar, etyolojisi ve geçiş modeli en iyi anlaşılmış olanlardır. Tek genli kalıtım veya aynı genin alelleri arasındaki tam dominantlık ilişkisi genin otozom (1-22 numaralı kromozomlar) veya gonozom (X ve Y kromozomları) üzerinde bulunmasına göre farklı geçiş ve fenotipik özellikler gösterir. Heterozigot bireylerde mutant alel etkisini fenotipte gösteriyorsa böyle aleller dominant (baskın) etki gösteriyor demektir. Otozomal dominant kalıtımda mutant aleli erkek veya kadının taşıyor olması doğacak çocukların etkilenmesi bakımından bir fark yaratmaz. O
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Conference papers on the topic "VAR-X model"

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Held, Jan, Hani Itani, Anthony Cioppa, Silvio Giancola, Bernard Ghanem, and Marc Van Droogenbroeck. "X-VARS: Introducing Explainability in Football Refereeing with Multi-Modal Large Language Models." In 2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW). IEEE, 2024. http://dx.doi.org/10.1109/cvprw63382.2024.00332.

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Adler Flitton, M. K., T. S. Yoder, and P. K. Nagata. "The Underground Corrosion of Selected Type 300 Stainless Steels after 34 Years." In CORROSION 2009. NACE International, 2009. https://doi.org/10.5006/c2009-09431.

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Abstract Recently, interest in long-term underground corrosion has greatly increased because of the ongoing need to dispose of nuclear waste. Additionally, the Nuclear Waste Policy Act of 1982 requires disposal of high-level nuclear waste in an underground repository. Current contaminant release and transport models use limited available short-term underground corrosion rates when considering container and waste form degradation. Consequently, the resulting models oversimplify the complex mechanisms of underground metal corrosion. The complexity of stainless steel corrosion mechanisms and the
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Camacho, Erika, Richard Rand, and Howard Howland. "Dynamics of Two Van Der Pol Oscillators Coupled via a Bath." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48593.

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In this work we study a system of two van der Pol oscillators, x and y, coupled via a “bath” z: x¨−ε(1−x2)x˙+x=k(z−x)y¨−ε(1−y2)y˙+y=k(z−y)z˙=k(x−z)+k(y−z) We investigate the existence and stability of the in-phase and out-of-phase modes for parameters ε &amp;gt; 0 and k &amp;gt; 0. To this end we use Floquet theory and numerical integration. Surprisingly, our results show that the out-of-phase mode exists and is stable for a wider range of parameters than is the in-phase mode. This behavior is compared to that of two directly coupled van der Pol oscillators, and it is shown that the effect of
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Rompala, Kevin, Richard Rand, and Howard Howland. "Dynamics of Three Coupled Van der Pol Oscillators With Application to Circadian Rhythms." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84017.

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In this work we study a system of three van der Pol oscillators, x, y and w, coupled as follows: x¨−ε(1−x2)x˙+x=εμ(w−x)y¨−ε(1−y2)y˙+y=εμ(w−y)w¨−ε(1−w2)w˙+p2w=εμ(x−w)+εμ(y−w) Here the x and y oscillators are identical, and are not directly coupled to each other, but rather are coupled via the w oscillator. We investigate the existence of the in-phase mode x = y for ε ≪ 1. To this end we use the two variable expansion perturbation method (also known as multiple scales) to obtain a slow flow, which we then analyze using the software products MACSYMA and AUTO. Our motivation for studying this syst
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Apriliadara, Meriska, Suhartono, and Dedy Dwi Prastyo. "VARI-X model for currency inflow and outflow forecasting with Eid Fitr effect in Indonesia." In THE 2016 CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCE FOR ADVANCED TECHNOLOGY (CONFAST 2016): Proceeding of ConFAST 2016 Conference Series: International Conference on Physics and Applied Physics Research (ICPR 2016), International Conference on Industrial Biology (ICIBio 2016), and International Conference on Information System and Applied Mathematics (ICIAMath 2016). Author(s), 2016. http://dx.doi.org/10.1063/1.4953966.

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Chatterjee, Riju, Ashutosh Patel, Nirmal Kumar, and Pramod Kumar. "Semi-Analytical Model for High-Speed Rotor Whirl Prediction: An Assumed Modes Formulation for an Axisymmetric Rotor With Non-Uniform Properties." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82632.

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Abstract Most fully analytical treatments of rotor whirl are restricted to very simple rotor geometries, and have limited use while studying real-world rotors. Analysis of more complex rotors is routinely carried out in Finite Element software such as Ansys, but this is less effective at generating fundamental insights to inform the design process. This paper is motivated by the ongoing development of a Supercritical-CO2 turbine rotor, and illustrates a rotor model of intermediate complexity. Such a model, given the relative novelty of the turbine design task stemming from the very high rotati
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Gentry, R., and Y. Nemerson. "THE ACTIVATION OF PROTHROMBIN: A LINKED REACTIVE KINETIC MODEL." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643932.

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Prothrombin activation by factors Xa and Va is complex, involving five linked reactions occurring either in a bulk fluid phase or in a local phospholipid (PL) surface phase, each controlled by both the fundamental energetics of the species interactions and the relevant reactant concentrations. The significance of each reaction and in particular the kinetic efficiency of the PL surface reactions is yet to be resolved. Previous essentially Michaelis-Menten kinetic treatments of prothrombin activation have been derived without concern for the kinetic influence of the order of reactant assembly or
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Hoffman, Timothy J., Steven B. Shooter, Simon Szykman, and Steven J. Fenves. "An Investigation of Catalogued Product Development Information at a Major Consumer Products Company." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/dtm-21690.

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Abstract A study of product development practices at a major consumer product manufacturer, referred to as Company X, was undertaken to compare its methods to an earlier effort in modeling the flow of information in product design, referred to as the Design Information Flow Model. The model considers the recognized need in industry for the seamless capture, storage, and retrieval of design information. The research at Company X focused on the front end of product design, that is, the conceptual phase. It was learned that design, as defined by the Information Flow Model, is well represented at
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Slaughter, Jon M. "Characterization of interfaces by using surface analysis and x-ray diffraction techniques." In OSA Annual Meeting. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.fqq1.

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Improving the performance of x-ray multilayer structures hinges on accurate determination and control of the details of interfaces between material pairs. Surface analysis tools, such as RHEED, LEED, Auger, XPS, AFM, and STM, are appropriate for the study of interfaces on a sub-nanometer scale. We have studied the initial stages of growth and interface formation in a variety of material pairs that are used in multilayer x-ray optics. Examples of such single-interface studies will be given, demonstrating the relationship between the growth mode and interface quality. In multilayers, interface r
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Behfar, K., R. Naghdabadi, A. Vafai, and H. E. Estekanchi. "Nanoscale Vibrational Analysis of an Embedded Multi-Layered Graphene Sheet." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58629.

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In this paper, nanoscale vibrational analysis of a multilayered graphene sheet embedded in an elastic medium is investigated and the corresponding resonant modes and frequencies are determined. It is known that the elastic moduli of a graphene sheet in two orientations x, y are different, so the graphene sheet is assumed to be a general form of an orthotropic plate. The orthotropic sheets stacking at the top of each other bond with carbon-carbon van der Waals forces, also the whole multi-layered graphene sheet is influenced by polymer-carbon van der Waals forces from the surrounding elastic me
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Reports on the topic "VAR-X model"

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Letcher, Theodore, Julie Parno, Zoe Courville, Lauren Farnsworth, and Jason Olivier. A generalized photon-tracking approach to simulate spectral snow albedo and transmittance using X-ray microtomography and geometric optics. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47122.

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A majority of snow radiative transfer models (RTMs) treat snow as a collection of idealized grains rather than an organized ice–air matrix. Here we present a generalized multi-layer photon-tracking RTM that simulates light reflectance and transmittance of snow based on X-ray micro- tomography images, treating snow as a coherent 3D structure rather than a collection of grains. The model uses a blended approach to expand ray-tracing techniques applied to sub-1 cm3 snow samples to snowpacks of arbitrary depths. While this framework has many potential applications, this study’s effort is focused o
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Melo-Velandia, Luis Fernando, Hernán Rincón-Castro, and Jorge Hernán Toro-Córdoba. Flujos brutos de capital de portafolio de no residentes y residentes y el rol de la política monetaria. Banco de la República Colombia, 2023. http://dx.doi.org/10.32468/be.1224.

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El objetivo del estudio es evaluar los principales determinantes de los flujos brutos de entradas y salidas de capital de portafolio de Colombia de los inversionistas no residentes y residentes y, en particular, estudiar el rol de la tasa de interés de política monetaria interna. El marco conceptual es el modelo estándar de portafolio aumentado con variables que miden factores de expulsión y atracción y medidas de sorpresas macroeconómicas. El modelo de regresión es una vector autorregresivo con variables exógenas o VAR-X y la información es de frecuencia mensual del periodo 2011 a 2020. Los r
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