Relevant bibliographies by topics / Wallet theory

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

Academic literature on the topic 'Wallet theory'

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

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Journal articles on the topic "Wallet theory"

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Watmah, Sri, Siti Fauziah, and Nuraeni Herlinawati. "Identifikasi Faktor Pengaruh Penggunaan Dompet Digital Menggunakan Metode TAM Dan UTAUT2." Indonesian Journal on Software Engineering (IJSE) 6, no. 2 (December 2, 2020): 261–69. http://dx.doi.org/10.31294/ijse.v6i2.8833.

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Abstract: Digital wallets as a method of payment made online using application services. By using a digital wallet service, digital users will find it easier to make transactions, both making payments, and making transfers to other banks with more affordable administrative costs. In addition, using a digital wallet can also make companies grow faster because it is easy to transact both directly and remotely. Several digital wallet service applications currently used in Indonesia include ovo, link aja, dana, and go-pay. This research was conducted to see the factors that influence the use of digital wallets as well as anything that a person desires to take care of a digital wallet with others. This study uses the TAM (Technology Acceptance Model) and UTAUT2 (Unifield Theory Of Acceptance And Use Of Technology) methods. The results show that the variables used in the study, in the form of benefits of digital wallets, social factors, innovation, user satisfaction and recommendations for using digital wallets, are factors that can influence someone using digital wallet services.Keywords: Digital Wallet, TAM, UTAUT2, Ovo, Go-PayAbstrak: Dompet digital sebagai salah satu metode pembayaran yang dilakukan secara online dengan menggunakan jasa aplikasi. Dengan menggunkaan layanan dompet digital pengguna akan lebih mudah dalam bertransaksi baik melakukan pembayaran, maupun melakukan trensfer ke bank lain dengan biaya administrasi yang lebih terjangkau. Selain itu dengan menggunakan dompet digital juga dapat membuat perusahaan berkembang lebih cepat karena mudahnya bertransaksi baik untuk bertransaksi secara langsung maupun jarak jauh. Beberapa aplikasi layanan dompet digital yang saat ini digunakan di Indonesia diantaranya ovo, link aja, dana, dan go-pay. Penelitian ini dilakukan untuk mengetahui faktor-faktor yang mempengaruhi seseorang menggunakan layanan dompet digital serta seberapa besar keinginan seseorang untuk merekomendasikan dompet digital kepada orang lain. Penelitian ini menggunakan metode TAM (Technology Acceptance Model) dan UTAUT2 (Unifield Theory Of Acceptance And Use Of Technology). Dari hasil penelitian menunjukan bahwa variabel-variabel yang digunakan dalam penelitian berupa manfaat dompet digital, faktor sosial, inovasi, kepuasan pengguna serta rekomendasi dari penggunaan dompet digital merupakan faktor yang dapat mempengaruhi seseorang menggunkaan layanan dompet digital.Kata kunci: dompet digital, TAM, UTAUT2, ovo, go-pay
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Daragmeh, Ahmad, Judit Sági, and Zoltán Zéman. "Continuous Intention to Use E-Wallet in the Context of the COVID-19 Pandemic: Integrating the Health Belief Model (HBM) and Technology Continuous Theory (TCT)." Journal of Open Innovation: Technology, Market, and Complexity 7, no. 2 (May 12, 2021): 132. http://dx.doi.org/10.3390/joitmc7020132.

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Personal safety has had a renewed focus throughout the COVID-19 pandemic, which has led to behavioral change. The adoption of E-wallets facilitates social distancing and thereby helps prevent the spread of the COVID-19 virus. This paper aims to investigate the potential for consumers’ continued usage of an E-wallet service through an integrated framework based on two established models: the Health Belief Model (HBM) and Technology Continuous Theory (TCT). An electronic survey was distributed to a sample of 1080 individuals from academic society in three different Hungarian universities who had used an electronic wallet during the pandemic COVID-19. Structural equation modelling (SEM) was applied in the study and explained the 55.9% variance in consumers’ continuous intention towards E-wallet usage. This study found that while the COVID-19 pandemic strongly influenced the current use of e-wallets; the pivotal factor affecting their continued use is based on consumer self-efficacy. The study has both short and long-term implications; in the short-term, decisionmakers should utilize health threat constructs (as an element of the protective behaviors taken during the COVID-19 pandemic) to motivate consumers to use E-wallets; in the longer-term, banks should develop further strategies that encourage consumer loyalty regarding E-wallets by reassuring customers that these financial services achieve the value and benefits that they expect, resulting in self-efficacy.
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Ramadhan, Didit, Ratih Hurriyati, and Lisnawati Lisnawati. "ANALISIS PERILAKU ADOPSI TEKNOLOGI MOBILE WALLET MENGGUNAKAN MODEL UNIFIED THEORY OF ACCEPTANCE AND USE OF TECHNOLOGY3 (UTAUT3) (Survei Pengguna OVO pada Generasi Milenial di Indonesia)." Journal of Business Management Education (JBME) 4, no. 3 (December 15, 2019): 23–29. http://dx.doi.org/10.17509/jbme.v4i3.18659.

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The development of technology has triggered developments in all industrial sectors, including circulation of money. There are three types of money currently circulating, namely currency, demand deposits and e-money. OVO is one of the server-based e-money publishers that can be accessed via a smartphone or commonly known as a mobile wallet. The low number of mobile wallet (m-wallet) users in Indonesia is interpreted from the number of people who use cash compared to m-wallets. Several factors influence the low use of m-wallet in Indonesia. Millennials are considered the generation closest to technology, the presence of new technology is a necessity that is owned by millennials. With this millennial generation, it is expected to be able to improve the performance or effectiveness of the presence of this m-wallet. The type of research used is descriptive verification, namely by describing and exposing the variables studied and then drawing conclusions. The research object is the variable found in the UTAUT3 model. The population in this study were OVO users in Indonesia. Sampling in this study uses non-probability sampling (random sampling) using a purposive sampling technique for 114 OVO users in the millennial generation in Indonesia. Instrument test is done by validity test and reliability test and the analysis technique used is analysis of Structural Equation Modeling based on Partial Least Square (SEM-PLS).
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Moorthy, Krishna, Ooi Yin Chiang, Aufa Amalina Kamarudin, Loh Chun T'ing, Chin Yoon Mei, and Sonia Johanthan. "Factors That Influence the Adoption of E-Wallets by the Malaysians." International Journal of E-Adoption 13, no. 2 (July 2021): 78–95. http://dx.doi.org/10.4018/ijea.2021070105.

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E-wallet has become a new payment method in the global trend, replacing cash payment gradually. Malaysia's national bank has set out objectives to move to a cashless society with electronic payment system in its Financial Sector Blueprint 2011-2020. Hence, this research aims to investigate the drivers that affect the behavioural intention of consumers towards the adoption of e-wallets in Malaysia. Performance expectancy, effort expectancy, and social influence are the three factors adopted from the unified theory of acceptance and use of technology model (UTAUT) to demonstrate the intention of consumers on e-wallet adoption. Additionally, perceived security and incentives are integrated into the research model to examine the factors that affect the e-wallet adoption. Four hundred fifty questionnaires were collected and analysed. The results show that all the factors have positive relationship with intention of e-wallet adoption. The research findings contribute to various parties such as the academicians, researchers, service providers, financial institutions, and the government.
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Rahmayanti, Putu Laksmita Dewi, I. Gusti Ngurah Jaya Agung Widagda, Ni Nyoman Kerti Yasa, I. Gusti Ayu Ketut Giantari, Martaleni Martaleni, Dwi Putra Buana Sakti, Suwitho Suwitho, and Putri Anggreni. "Integration of technology acceptance model and theory of reasoned action in pre-dicting e-wallet continuous usage intentions." International Journal of Data and Network Science 5, no. 4 (2021): 649–58. http://dx.doi.org/10.5267/j.ijdns.2021.8.002.

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The purpose of this study is to determine the factors influencing continuous usage intention of E-Wallet in Denpasar City with integrating the Technology Acceptance Model (TAM) And Theory of Reasoned Action (TRA). This study applied a structural equation model analysis with 140 samples collected from E-Wallet users in Denpasar City. The results show that all three determinants of E-Wallet continuous usage intention, including perceived usefulness, perceived ease of use, and attitude. Recommendations are provided for E-Wallet providers to improve their user continuous usage intention in Denpasar City.
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Phutela, Nidhi, and Shrirang Altekar. "Mobile Wallets in India." International Journal of Online Marketing 9, no. 2 (April 2019): 27–38. http://dx.doi.org/10.4018/ijom.2019040103.

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Adoption of technology by the Indians is setting an example for the others. Considering the penetration of mobile phones and its usage success stories all over the world, a good number of companies are exploring new uses of mobile technology. Many companies have come up with a new use of mobile technology, mobile wallets. This research article has been undertaken to understand the previous research work on the adoption of mobile technology in the developed countries and the factors that are influential to understand the reasons for such adoption. The Unified Theory of Acceptance and Use of Technology (UTAUT) Model has been taken as a base for understanding the adoption by Indian consumers and two factors namely – Trust in mobile wallet services and trust in mobile wallet service providers have been examined for their impact on its adoption. A survey was conducted across Delhi NCR to examine attitude of Indian consumers for mobile wallets adoption.
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Et.al, DR B. BARACKATH. "“The Impact Of Digital Wallets Threats And Safety Measures On The Level Of Usage” – A Study With Reference To Chennai." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 6 (April 11, 2021): 95–100. http://dx.doi.org/10.17762/turcomat.v12i6.1272.

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Digital wallet refers to an electronic system that enables a person to make purchases on a commodity or commodity class basis. It is a device that safely stores the payment details and password of consumers for the variety of payment methods and websites. The wallet may be Computer, Web, Smartphone or hardware wallets. Any payment by online format is subject to the limitations and threats of data security, which contribute to an increase in safety awareness of the use of information. Electronic wallets are used in the banking, investment, insurance, retail, educational, travel, entertainment and utility industries. The objective of this research study is to determine possible risks and safety measures for safer management of e-wallets and increased accessibility. An empiric research was performed by surveying 80 respondents and evaluating the data obtained by applying statistical methods such as one direction ANOVA, Matched t-test by using SPSS and Confirmatory multivariate statistical using Amos software. A simple structural equation modelling is often used to define a relationship between dependent and independent variables.
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Yang, Marvello, Abdullah Al Mamun, Muhammad Mohiuddin, Noorshella Che Nawi, and Noor Raihani Zainol. "Cashless Transactions: A Study on Intention and Adoption of e-Wallets." Sustainability 13, no. 2 (January 15, 2021): 831. http://dx.doi.org/10.3390/su13020831.

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This study explored the effect of perceived usefulness, perceived ease of use, social influence, facilitating condition, lifestyle compatibility, and perceived trust on both the intention to use an e-wallet and the adoption of an e-wallet among adults by using the unified theory of acceptance and use of technology (UTAUT). This quantitative study adopted a cross-sectional research design to gather data from 501 respondents using a Google Form. The collected data were analyzed using partial least square structural equation modelling (PLS-SEM). As a result, perceived usefulness, perceived ease of use, social influence, lifestyle compatibility, and perceived trust displayed a significant positive effect on both intentions to use an e-wallet and adoption of an e-wallet. This study evidenced the mediating effect of the intention to use an e-wallet on the correlations between the predictors and adoption of an e-wallet. Both the age and gender of the respondents moderated the effect of lifestyle compatibility on intention to use an e-wallet. The study outcomes serve to inform managers and policy makers to devise effective strategies that capture consumers’ intention to use and experience of using an e-wallet in the midst of a turbulent market. Ultimately, such carefully sculpted policies may promote the digital platform and web-based application, apart from encouraging higher rates of e-wallet adoption in developing countries.
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Kumar, Anup, Amit Adlakaha, and Kampan Mukherjee. "The effect of perceived security and grievance redressal on continuance intention to use M-wallets in a developing country." International Journal of Bank Marketing 36, no. 7 (October 1, 2018): 1170–89. http://dx.doi.org/10.1108/ijbm-04-2017-0077.

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Purpose Many developing countries, including India, are committed to curbing black money from the economy. Therefore, these countries are focusing on a transparent online transaction facility. M-wallets are one online option facilitated by various companies using a mobile application. The purpose of this paper is to investigate the impact of perceived usefulness, perceived security, perceived ease of use, trust, grievance redressal and satisfaction on young users’ intention to continually use M-wallet in India. Design/methodology/approach A research framework based on the expectation–confirmation theory has been formulated and tested empirically using data from M-wallets young users in India using structural equation modeling. Findings The analysis reveals that perceived usefulness and perceived ease of use significantly affect user satisfaction and intention to continually use M-wallets. The effect of perceived security on user satisfaction is significant, and grievance redressal mediates the effect of perceived security on intention to continually use M-wallets. Practical implications The outcome of the research will help M-wallet service providers and policy makers in planning the service and increasing customer’ continuance intention. Originality/value The uniqueness of this research is that it adds two important constructs for mobile payment systems (grievance redressal and perceived security) that were missing in the earlier model proposed by Zhou (2013). The addition of the two constructs helped in formulating a better model.
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Damayanti, Sindi Livia, Yepi Yani, Asnaini Asnaini, and Nonie Afrianty. "Minat Menggunakan E-Wallet pada Generasi Milenial dengan Pendekatan UTAUT (Unified Theory of Acceptance Use of Technology)." Jurnal BAABU AL-ILMI: Ekonomi dan Perbankan Syariah 6, no. 1 (April 30, 2021): 63. http://dx.doi.org/10.29300/ba.v6i1.3988.

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This study aims to examine the influences of the factors contained in the UTAUT theory to the interest in using e-wallets for the millennials. This study used the analysis of Structural Equation Modeling (SEM) with SmartPLS software. The sample used is 100 millennials respondent in Kota Bengkulu. The sampling technique used was purposive sampling. The purposive sampling is used because this study requires certain criteria such as the age of the respondents in the birth range 1981-2000, using an e-wallet and live in Kota Bengkulu. The data collection technique used google form questionnaire and shared to millennials through social media such as WhatsApp, Instagram, and Facebook. The results of this study indicate that three of the factors in the UTAUT tested consisting of business expectations, social influences, and facility conditions have a positive and significant influences to the interest of the millennials to use e-wallets in Kota Bengkulu, while the performance expectation factor does not have a positive and Significant influences to millennials interest in using e-wallets in the Bengkulu City
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Dissertations / Theses on the topic "Wallet theory"

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Sánchez, Garvín Mario. "Network constellations for mobile payments - Influence of the leading partner on NFC-based mobile digital wallets." Thesis, KTH, Bygg- och fastighetsekonomi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-76718.

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The mobile payments industry, which is currently at an early stage of development, is taking the direction to be established mainly as an NFC-based industry, and, moreover, led by the mobile digital wallets setting. A mobile digital wallet is a complete payment app for your NFC-enabled mobile phone that enables consumers to pay at stores at the point of sale with a mobile phone. The digital wallet, which is associated with a credit card, integrates all payment-related services like the management and storage of receipts, coupons and offers, and loyalty cards. Currently, there are three big partnerships going ahead of the NFC mPayments stream: Google Wallet, VISA’s Digital Wallet and ISIS Mobile Wallet. Each one of these three mobile digital wallets is led by an actor coming from a different industry of origin. Google Wallet is led by Google, an internet and technology actor. VISA’s Digital Wallet is managed by Visa, a traditional payment processor. And ISIS Mobile Wallet is led by three of the largest US telecom operators: AT&T, T-Mobile and Verizon. Thus, applying a business network theory to analyse how the industry of origin of the mobile digital wallet affects the interaction within the partnership formed is a unique and perfectly fitted opportunity. The aim of this Master Thesis was to analyse the influence, regarding interaction, of the origin industry of the leading partners on the NFC-based mobile digital wallet partnerships of the mobile payments developing industry. A literature review on business network theory was conducted, in order to identify key features of the business landscape affecting interaction on business networks, as well as an industry analysis of the mobile payments developing industry. Then, the business network theory approach was applied to the study of the mobile payments digital wallet setting, conducting a discussion based both on the industry analysis performed and a set of interviews with experts on the mobile payments industry.
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Bartoo, Debora S. "Financial Services Innovation: Opportunities for Transformation Through Facial Recognition and Digital Wallet Patents." Antioch University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1370778739.

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Bulgakova, Daria. "Some aspects of representation theory of walled Brauer algebras." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0022.

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L'algèbre de Brauer murée est une algèbre unitaire associative. Il s’agit d’une algèbre de diagramme engendré par des diagrammes «murés» particuliers. Cette algèbre peut être définie par des générateurs et des relations. Dans le premier chapitre de la thèse, nous construisons la forme normale de l'algèbre de Brauer murée - un ensemble de monômes de base (mots) dans les générateurs. Nous introduisons une modification “ordonnée” du fameux lemme du diamant de Bergman, à savoir, nous présentons un ensemble de règles qui, étant appliquées dans un certain ordre, permet de réduire tout monôme dans les générateurs à un élément de la forme normale. Nous appliquons ensuite la forme normale pour calculer la fonction génératrice du nombre de mots avec une longueur minimale donnée.Une procédure de fusion donne une construction de la famille maximale d'idempotents orthogonaux minimaux par paire dans l'algèbre et, par conséquent, fournit un moyen de comprendre les bases dans les représentations irréductibles. Nous construisons la procédure de fusion pour l'algèbre de Brauer murée, à savoir, tous les idempotents primitifs est trouvé par les évaluations consécutives de fonction rationnelle en plusieurs variables.Dans le deuxième chapitre, nous étudions le produit tensoriel mixte des représentations fondamentales tridimensionnelles de l'algèbre de Hopf U_q sl(2|1). L'un des principaux résultats consiste à établir des formules explicites pour la décomposition des produits tensoriels de tout module de U_q sl(2|1) simple ou projectif avec les modules générateurs. Un autre résultat important consiste à décomposer le produit tensoriel mixte en un bimodule
The walled Brauer algebra is an associative unital algebra. It is a diagram algebra spanned by particular ‘walled’ diagrams with multiplication given by concatenation. This algebra can be defined in terms of generators, obeying certain relations. In the first part of the dissertation we construct the normal form of the walled Brauer algebra - a set of basis monomials (words) in generators. This set is constructed with the aid of the so-called Bergman’s diamond lemma: we present a set of rules which allows one to reduce any monomial in generators to an element from the normal form. We then apply the normal form to calculate the generating function for the numbers of words with a given minimal length.A fusion procedure gives a construction of the maximal family of pairwise orthogonal minimal idempotents in the algebra, and therefore, provides a way to understand bases in the irreducible representations. As a main result of the second part we construct the fusion procedure for the walled Brauer algebra and show that all primitive idempotents can be found by evaluating a rational function in several variables. In the third part we study the mixed tensor product of three-dimensional fundamental representations of the Hopf algebra U_q sl(2|1). One of the main results consists in the establishing of the explicit formulae for the decomposition of tensor products of any simple or any projective U_q sl(2|1)-module with the generating modules. Another important outcome consists in decomposing the mixed tensor product as a bimodule
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Lindsay, Lucas R. "Theory of Phonon Thermal Transport in Single-walled Carbon Nanotubes and Graphene." Thesis, Boston College, 2010. http://hdl.handle.net/2345/1167.

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Thesis advisor: David A. Broido
A theory is presented for describing the lattice thermal conductivities of graphene and single-walled carbon nanotubes. A phonon Boltzmann transport equation approach is employed to describe anharmonic phonon-phonon, crystal boundary, and isotopic impurity scattering. Full quantum mechanical phonon scattering is employed and an exact solution for the linearized Boltzmann transport equation is determined for each system without use of common relaxation time and long-wavelength approximations. The failures of these approximations in describing the thermal transport properties of nanotubes is discussed. An efficient symmetry based dynamical scheme is developed for carbon nanotubes and selection rules for phonon-phonon scattering in both graphene and nanotubes are introduced. The selection rule for scattering in single-walled carbon nanotubes allows for calculations of the thermal conductivities of large-diameter and chiral nanotubes that could not be previously studied due to computational limitations. Also due to this selection rule, no acoustic-only umklapp scattering can occur, thus, acoustic-optic scattering must be included in order to have thermal resistance from three-phonon processes. The graphene selection rule severely restricts phonon-phonon scattering of out-of-plane modes. This restriction leads to large contributions to the total thermal conductivity of graphene from the acoustic, out-of-plane modes which have been previously neglected. Empirical potentials used to model interactions in carbon-based materials are optimized to better describe the lattice dynamics of graphene-derived systems. These potentials are then used to generate the interatomic force constants needed to make calculations of the thermal conductivities of graphene and carbon nanotubes. Calculations of the thermal conductivities of single-walled carbon nanotubes and graphene for different temperatures and lengths are presented. The thermal conductivities of SWCNTs saturate in the diffusive regime when the effects of higher-order scattering processes are estimated and correctly reproduce the ballistic limit for short-length nanotubes at low temperatures. The effects of isotopic impurity scattering on the thermal conductivities of graphene and SWCNTs are explored. Isotopic impurities have little effect in the low (high) temperature regime where boundary (umklapp) scattering dominates the behavior of the thermal conductivities. In the intermediate temperature regime, modest reductions in the thermal conductivities, 15-20%, occur due to impurities. The thermal conductivities of a wide-range of SWCNTs are explored. The thermal conductivities of successively larger-diameter, one-dimensional nanotubes approach the thermal conductivity of two-dimensional graphene
Thesis (PhD) — Boston College, 2010
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
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Ahmed, Malik Nazir. "The constrained torsional analysis of thin-walled variable cross-section multi-cell laminated composite beams." Thesis, Cranfield University, 1999. http://hdl.handle.net/1826/3002.

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A Constrained Torsional Analysis of Thin-Walled Variable Cross-Section Multi-Cell Laminated Composite Beams has been undertaken . The existing Isotopic theory has been modified using the effective engineering elastic constants to cater for the Composite structures under torsional loads. The relevant computer programs for the Composite structure analysis have also been developed. The results are discussed in detail for single-cell and multi-cell prismatic/tapered beams for all [0/45/-45/90], lay up in flanges and webs, all [45/-45]2], lay-up in flanges and webs, and for flanges [0/45/-45/90], & webs [45/-45]2], lay-up. The theoretical results obtained are then compared with those obtained from a finite element method analysis carried out by the author employing MSC commercial package PATRAN/NASTRAN. This has provided confidence in the validity and capability of the developed Composite theory in handling the Torsional Analysis of Variable Cross-section Single-Cell & Multi-Cell Laminated Composite Beams.
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Gutierrez, Sanchez Alejandro Rafael <1985&gt. "Modelling and analysis of thin-walled beams in the context of the Generalized Beam Theory." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6629/.

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In this work, the Generalized Beam Theory (GBT) is used as the main tool to analyze the mechanics of thin-walled beams. After an introduction to the subject and a quick review of some of the most well-known approaches to describe the behaviour of thin-walled beams, a novel formulation of the GBT is presented. This formulation contains the classic shear-deformable GBT available in the literature and contributes an additional description of cross-section warping that is variable along the wall thickness besides along the wall midline. Shear deformation is introduced in such a way that the classical shear strain components of the Timoshenko beam theory are recovered exactly. According to the new kinematics proposed, a reviewed form of the cross-section analysis procedure is devised, based on a unique modal decomposition. Later, a procedure for a posteriori reconstruction of all the three-dimensional stress components in the finite element analysis of thin-walled beams using the GBT is presented. The reconstruction is simple and based on the use of three-dimensional equilibrium equations and of the RCP procedure. Finally, once the stress reconstruction procedure is presented, a study of several existing issues on the constitutive relations in the GBT is carried out. Specifically, a constitutive law based on mirroring the kinematic constraints of the GBT model into a specific stress field assumption is proposed. It is shown that this method is equally valid for isotropic and orthotropic beams and coincides with the conventional GBT approach available in the literature. Later on, an analogous procedure is presented for the case of laminated beams. Lastly, as a way to improve an inherently poor description of shear deformability in the GBT, the introduction of shear correction factors is proposed. Throughout this work, numerous examples are provided to determine the validity of all the proposed contributions to the field.
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Cai, Junle. "Interactive Buckling and Post-Buckling Studies of Thin-Walled Structural Members with Generalized Beam Theory." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/75055.

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Most thin-walled metallic structural members experience some extent of interactive buckling that corrodes the load carrying capacity. Current design methods predict the strength of thin-walled metallic structural members based on individual buckling limit-states and limited case of interactive buckling limit state. In order to develop design methods for most coupled buckling limit states, the interaction of buckling modes needs to be studied. This dissertation first introduces a generally applicable methodology for Generalized Beam Theory (GBT) elastic buckling analysis on members with holes, where the buckling modes of gross cross-section interact with those of net cross-section. The approach treats member with holes as a structural system consisting of prismatic sub-members. These sub-members are connected by enforcing nodal compatibility conditions for the GBT discretization points at the interfaces. To represent the shear lag effect and nonlinear normal stress distribution in the vicinity of a hole, GBT shear modes with nonlinear warping are included. Modifications are made to the GBT geometric stiffness because of the influence from shear lag effect caused by holes. In the following sections, the GBT formulation for a prismatic bar is reviewed and the GBT formulation for members with holes is introduced. Special aspects of analyzing members with holes are defined, namely the compatibility conditions to connect sub-members and the geometric stiffness for members with holes. Validation and three examples are provided. The second topic of this dissertation involves a buckling mode decomposition method of normalized displacement field, bending stresses and strain energy for thin-walled member displacement field (point clouds or finite element results) based on generalized beam theory (GBT). The method provides quantitative modal participation information regarding eigen-buckling displacement fields, stress components and elastic strain energy, that can be used to inform future design approaches. In the method, GBT modal amplitudes are retrieved at discrete cross-sections, and the modal amplitude field is reconstructed assuming it can be piece-wisely approximated by polynomials. The unit displacement field, stress components and strain energy are all retrieved by using reconstructed GBT modal amplitude field and GBT constitutive laws. Theory and examples are provided, and potential applications are discussed including cold-formed steel member design and post-disaster evaluation of thin-walled structural members. In the third part, post-buckling modal decomposition is made possible by development of a geometrically nonlinear GBT software. This tool can be used to assist understanding couple-buckling limit-states. Lastly, the load-deformation response considering any one GBT mode is derived analytically for fast computation and interpretation of structural post-buckling behavior.
Ph. D.
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Jirlén, Johan, and Emil Kauppi. "Carbon Nanotube Raman Spectra Calculations using Density Functional Theory." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62169.

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Utilizing density functional theory (DFT) the Vienna Ab initio Simulation Package (VASP) was used to calculate the Raman spectra for five single-walled carbon nanotubes (SWCNTs) with chiralities (4,4), (6,6), (8,0), (12,0) and (7,1). The radial breathing mode (RBM), when compared with experimental frequencies, shows good correlation. When compared to RBM:s calculated with tight binding the frequencies calculated with DFT displayed higher accuracy. The precision of G-band frequencies were inconclusive due to lack of experimental data. The frequencies did not agree well with the results from tight-binding theory. The correctness of the Raman activity estimations using results from DFT calculations was found to be questionable. An unknown mode, which was found to be highly Raman active in the calculated spectra of (4,4), (6,6), and possibly (8,0), and (12,0), is also discussed. It was concluded that further calculations on larger tubes, especially armchair tubes are relevant for future studies. Further verification of the determination of Raman activity is also needed.

Supervisors: Daniel Hedman, Andreas Larsson and Sven Öberg


F7042T - Project in Engineering Physics
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Lo, Hung-Chieh. "Vibration Characteristics of Thin-Walled Noncircular Composite Cylinders." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77207.

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The lowest natural frequencies of thin-walled noncircular fiber-reinforced composite cylinders, specifically cylinders with elliptical cross sections, are investigated. Of interest is the variation of the lowest natural frequency, the so-called fundamental frequency, as a function of wall laminate properties, cross-sectional eccentricity and other cylinder geometric parameters. Both simple and clamped support boundary conditions are investigated. Laminate properties that are uniform with circumferential location and laminate properties that vary with circumferential location, by way of varying laminate fiber angle with circumferential location, are considered. As the radius of curvature of a noncircular cylinder varies with circumferential location, it is logical to consider the influence of circumferentially varying fiber orientation on the fundamental frequency. The analysis for predicting the fundamental frequency is based on Donnell shell theory, linear elastic properties, and the use of Hamilton's Principle in conjunction with the Rayleigh-Ritz technique. By use of a so-called shape factor, the magnitude of cylinder normal displacements are modulated to be larger in the regions of the cross section with the largest radius of curvatures and smaller in the regions with the smallest radius of curvature. The final equations for predicting the fundamental frequency are quite complex, but a series of approximations results in a hierarchy of simpler equations, the simplest being referred to as Lo's approximation. The prediction of the fundamental frequencies is spot checked by comparing the results as predicted by the various levels of approximation with predictions of a shell-based finite element model. Considering uniform laminate properties, comparisons between the developed analysis and the finite element model are good for all levels of simpler equations, and excellent in some cases. The developed analysis is subsequently used for parameter studies. It is found that compared to a circular cylinder of the same circumference and with uniform laminate properties, the fundamental frequency of an elliptical cylinder is always less. Surprisingly, based on the results obtained, it appears that for a given cylinder geometry the fundamental frequency is not particularly sensitive to wall lamination sequence, though the wave number in the circumferential direction of the mode shape associated with the fundamental frequency is sensitive to lamination sequence. Considering cylinders with circumferentially varying fiber orientation, comparisons between the developed analysis and the finite element model for most of the cases studied are good. However, the developed equations are limited since it is difficult to find a set of known functions to describe the deformation of an arbitrary lamination sequence when applying the Rayleigh-Ritz technique. In general, in can be concluded that the effect of varying fiber orientation on the fundamental frequency is much less than the influence of cylinder aspect ratio. It can also be concluded that the developed analysis would be an excellent tool for design purposes, as the calculation of the fundamental frequency is done quickly, and design trade-offs studies would be easy.
Ph. D.
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Melchionda, Domenico <1987&gt. "First-Order and Buckling Analysis of Thin-Walled Members with Deformable Cross-Section within the Generalized Beam Theory." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7564/.

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In this work, the Generalized Beam Theory (GBT) is used as the main tool to analyze the mechanics of thin-walled beams. After a brief introduction to the subject, the attention is focused on the constitutive relations both for the isotropic and the orthotropic cases. In particular, a novel approach based on energetic arguments , able to automatically select appropriate constitutive relations in accordance with the GBT kinematics, is presented. Furthermore, the concept of consistency of a GBT-based model is introduced and a consistency analysis is conducted. This provides a formal basis to investigate the effects of various families of cross-section deformation modes in terms of predictive capabilities of the GBT model. Later, a new finite element for GBT beams is presented. The element is based on the hybrid complementary energy functional, involving nodal displacements and equilibrating stresses within the element as indipendent variables. Assumed stresses are rationally derived basing on the stresses associated to analytical solutions of some particular cases. The numerical results show the high performance of the proposed element. Subsequently, in the framework of cold-formed stability verification, a verification approach called Embedded Stability Analysis is shown. The verification approach, based on the GBT, is an interesting alternative to the simplified procedures provided by current standards and it is applicable in a simple and general way. A synthetic parameter allows the designer to evaluate when it is more appropriate to consider the distortional effects in thin-walled stability check. Finally, in the framework of cold-formed stability analysis, a new version of the so-called approach ECBL (Erosion of the Critical Load Bifurcation), based on the GBT, is presented. The numerical results show an excellent agreement between the new version ECBL approach and the experimental results.
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Books on the topic "Wallet theory"

1

Librescu, Liviu. Thin-walled composite beams: Theory and application. Dordrecht: Springer, 2006.

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Ohseop, Song, ed. Thin-walled composite beams: Theory and application. Dordrecht, The Netherlands: Springer, 2006.

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B, Donald I., ed. Thin-walled structures: Developments in theory and practice : the N.W. Murray Symposium. London: Elsevier Applied Science, 1990.

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Mikulski, Tomasz. Ramy cienkościenne modelowanie i analiza wrażliwości. Gdańsk: Politechnika Gdańska, 2000.

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Mikulski, Tomasz. Ramy cienkościenne modelowanie i analiza wrażliwości. Gdańsk: Politechnika Gdańska, 2000.

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Fundamentals of the three-dimensional theory of stability of deformable bodies. Berlin: Springer, 1999.

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Evans, Walker. Walker Evans. New York: Thames & Hudson, 2007.

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Evans, Walker. Walker Evans. London: Thames & Hudson, 2007.

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Evans, Walker. Walker Evans. Denville, N.J: Aperture Foundation and Konemann, 1997.

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Morris, Hambourg Maria, Metropolitan Museum of Art (New York, N.Y.), San Francisco Museum of Modern Art., and Museum of Fine Arts, Houston., eds. Walker Evans. New York: Metropolitan Museum of Art in association with Princeton University Press, Princeton, 2000.

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Book chapters on the topic "Wallet theory"

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Li, Jianbiao, and Yuliang Zhao. "The Puzzle of Lost Wallet Game: Challenge of Reciprocity Theory." In Communications in Computer and Information Science, 222–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23023-3_34.

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Le Bon, Joël. "Predicting Business Customer Potential DISLOYALTY and Share of Wallet: Proposition of a New Theory and Moderating Effects." In Developments in Marketing Science: Proceedings of the Academy of Marketing Science, 198. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10951-0_71.

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Brockmann, T. H. "Adaptive Thin-Walled Beams." In Theory of Adaptive Fiber Composites, 115–38. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2435-0_7.

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Rehr, John J. "Theory Versus Reality." In Walter Kohn, 198–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55609-8_72.

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Pantelides, Sokrates T. "He Did Effective-Mass Theory Too!" In Walter Kohn, 183–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55609-8_66.

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Yang, Yeong-Bin. "Stability of Thin-Walled Beams — A General Theory." In Lecture Notes in Engineering, 280–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83015-0_25.

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Kiparsky, Paul. "Reply to Mohanan and Walker." In Current Issues in Linguistic Theory, 48. Amsterdam: John Benjamins Publishing Company, 1996. http://dx.doi.org/10.1075/cilt.144.09kip.

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Dressler, Wolfgang U. "Reply to Janda and Walker." In Current Issues in Linguistic Theory, 102. Amsterdam: John Benjamins Publishing Company, 1996. http://dx.doi.org/10.1075/cilt.144.15dre.

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Mikhasev, Gennadi I., and Petr E. Tovstik. "Equations of the two-dimensional theory of shells." In Localized Dynamics of Thin-Walled Shells, 17–49. First edition. | Boc Raton : CRC Press, 2020. | Series: Chapman & Hall/CRC monographs and research notes in mathematics: Chapman and Hall/CRC, 2020. http://dx.doi.org/10.1201/9781315115467-2.

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Møllmann, H. "Theory of Thin-Walled Elastic Beams with Finite Displacements." In Lecture Notes in Engineering, 195–209. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82838-6_15.

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Conference papers on the topic "Wallet theory"

1

Kreft, Heinz, and Wael Adi. "Wallet Based E-Cash System for Secured Multi-hop Cash Exchange." In Communication Technologies: from Theory to Applications (ICTTA). IEEE, 2008. http://dx.doi.org/10.1109/ictta.2008.4529987.

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"Social Network Identity: Facebook, Twitter and Identity Negotiation Theory." In iConference 2014 Proceedings: Breaking Down Walls. Culture - Context - Computing. iSchools, 2014. http://dx.doi.org/10.9776/14276.

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Yu, Wenbin, Dewey Hodges, and Vitali Volovoi. "Theory of Initially Twisted, Composite, Thin-walled Beams." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1418.

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BERDICHEVSKY, VICTOR, ASHRAF BADIR, and ERIAN ARMANIOS. "THEORY OF COMPOSITE THIN-WALLED OPENED-CROSS-SECTION BEAMS." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1620.

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Fernandes, Thiago Vieira, and Paulo de Mattos Pimenta. "Plate theory in the resolution of thin-walled structures." In XXXVIII Iberian-Latin American Congress on Computational Methods in Engineering. Florianopolis, Brazil: ABMEC Brazilian Association of Computational Methods in Engineering, 2017. http://dx.doi.org/10.20906/cps/cilamce2017-0153.

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"Teaching Instructivist Educated Digital Natives Using a Constructivist Learning Theory in Transnational Education." In iConference 2014 Proceedings: Breaking Down Walls. Culture - Context - Computing. iSchools, 2014. http://dx.doi.org/10.9776/14354.

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Guran, A., L. Lebedev, Michail D. Todorov, and Christo I. Christov. "Basic Concepts in the Stability Theory of Thin-walled Structures." In APPLICATION OF MATHEMATICS IN TECHNICAL AND NATURAL SCIENCES: Proceedings of the 2nd International Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3526619.

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Maru, Nobuhito. "SUSY breaking by stable non-BPS walls." In STRING THEORY; 10th Tohwa University International Symposium on String Theory. AIP, 2002. http://dx.doi.org/10.1063/1.1454375.

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BADIR, ASHRAF. "Theory of anisotropic thin-walled closed-section beams with hygrothermal effects." In 33rd Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-2543.

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Lagunas, Eva, Moeness G. Amin, and Fauzia Ahmad. "Through-the-wall radar imaging for heterogeneous walls using compressive sensing." In 2015 3rd International Workshop on Compressed Sensing Theory and its Applications to Radar, Sonar and Remote Sensing (CoSeRa). IEEE, 2015. http://dx.doi.org/10.1109/cosera.2015.7330271.

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Reports on the topic "Wallet theory"

1

Silverstein, E. M. Self-tuning flat domain walls in 5d gravity and string theory. Office of Scientific and Technical Information (OSTI), February 2000. http://dx.doi.org/10.2172/753284.

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Drouilhet, S., and M. Shirazi. Wales, Alaska High Penetration Wind-Diesel Hybrid Power System: Theory of Operation. Office of Scientific and Technical Information (OSTI), May 2002. http://dx.doi.org/10.2172/15000710.

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Moin, Parviz, Jeremy A. Templeton, and Meng Wang. Wall Models for Large-Eddy Simulation Based on Optimal Control Theory. Fort Belvoir, VA: Defense Technical Information Center, June 2006. http://dx.doi.org/10.21236/ada451008.

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Keith, William L. Spectral Measurements of the Wall Shear Stress and Wall Pressure in a Turbulent Boundary Layer: Theory. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada224070.

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Mendel, Glen Wesley, and Virginia Naef. Assessment of Salmonid Fishes and their Habitat Conditions in the Walla Walla River Basin, 1998 Annual Report. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/781609.

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Mendel, Glen Wesley, David Karl, and Terrence Coyle. Assessment of Salmonids and their Habitat Conditions in the Walla Walla River Basin of Washington : 2000 Annual Report. Office of Scientific and Technical Information (OSTI), November 2001. http://dx.doi.org/10.2172/795638.

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Mendel, Glen Wesley, Jeremy Trump, and David Karl. Assessment of Salmonids and their Habitat Conditions in the Walla Walla River Basin within Washington, 2001 Annual Report. Office of Scientific and Technical Information (OSTI), December 2002. http://dx.doi.org/10.2172/815065.

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Mendel, Glen Wesley, and David Karl. Assessment of Salmonid Fishes and their Habitat Conditions in the Walla Walla River Basin of Washington, 1999 Annual Report. Office of Scientific and Technical Information (OSTI), July 2000. http://dx.doi.org/10.2172/781610.

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Mendel, Glen, Jeremy Trump, and Mike Gembala. Assessment of Salmonids and Their Habitat Conditions in the Walla Walla River Basin within Washington, Annual Report 2002-2003. Office of Scientific and Technical Information (OSTI), September 2003. http://dx.doi.org/10.2172/962965.

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Schulz, M. Domain Walls, Branes, and Fluxes in String Theory: New Ideas on the Cosmological Constant Problem, Moduli Stabilization, and Vacuum Connectedness. Office of Scientific and Technical Information (OSTI), April 2005. http://dx.doi.org/10.2172/839826.

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