http://hdl.handle.net/2142/9 This is the default collection for all research and scholarship developed by faculty, staff or students at the University of Illinois at Urbana-Champaign https://www.ideals.uiuc.edu/retrieve/18 http://hdl.handle.net/2142/9 Search the Channel search https://www.ideals.uiuc.edu/simple-search http://hdl.handle.net/2142/8966 Title: Economic-Model-Driven Enterprises Simulation Modeling Method <br/> <br/>Authors: Yueting, Chai <br/> <br/>Abstract / Summary: Aiming at the insufficiency of the description capability of the decision scenarios while setting up supply chain simulation models, an economic-model-driven enterprises simulation modeling method is proposed based on a brief review of previous results. A graphic modeling method, named Decision Network Diagram (DND), is carefully designed based on the semantic extension of the influence diagram, using which, the coupling relationships among economic models can be pictured and the least-maximum paths of the graph hint and assist the design of simulation processes. An example is introduced to illustrate the use of DND. <br/> <br/>Keywords: supply chain simulation; DES; simulation modeling method; influence diagram; Decision Support Systems http://hdl.handle.net/2142/8965 Title: Business Process Based Simulation: A Powerful Tool for Demand Analysis of Business Process Reengineering and Information System Implementation <br/> <br/>Authors: Yueting, Chai; Yi, Liu <br/> <br/>Abstract / Summary: Demand analysis is of fundamentally importance in the implementation of information system. Business process reengineering (BPR) often gets involved in the process of demand analysis and play a crucial role in the achieve-ment of project objectives. Business process based simu-lation (BPS) provides a precise and visual method to ana-lyze and compare the concerned performances before and after BPR. The paper presents an industrial experience in using the BPS tool to demonstrate the effects of BPR on restraining stocking-up and overdue payments in the dis-tribution management of a supply chain. Before signifi-cant investment involved, the related design result of BPR is validated both by the analytical method and simulation experiments. Based on the mutual supportive results, the BPS method approves its correctness and show its nicety, flexibility and the capacity of visualization. <br/> <br/>Keywords: business process modeling; supply chain simulation; demand analysis; information system implementation; business process reengineering http://hdl.handle.net/2142/8964 Title: Modeling and existence of enterprise synergy mechanisms <br/> <br/>Authors: Yueting, Chai <br/> <br/>Abstract / Summary: Cooperation between companies provides synergy, through imp roved supply chain coordination. Th is paper gives a formal definition of the enterprise synergy problem (ESP) and criteria for the existence of the ESP mechanism. The ESP is defined as the optimal status of the overall supply chain for a given set of mechanism s on the condition that each enterprise in the chain gains its satisfied utility. The p roof of the existence of a given set of mechanism s show s that an arbitrary supply chain can achieve synergy as long as it s members are sufficiently concerned about long-term targets. <br/> <br/>Keywords: supply chain; enterprises' synergy; game theory; repeated gaming http://hdl.handle.net/2142/8962 Title: Disjunction junction: Experimenting with or-agreement <br/> <br/>Authors: Garley, Matthew E. <br/> <br/>Abstract / Summary: This is an unpublished qualifying exam paper in Linguistics which reports and analyzes the results of a lengthy acceptability judgment task performed using reliable empirical methods. The task involved cases of disjunction ('or'-coordination) and agreement. A syntactic account of the findings are proposed. <br/> <br/>Keywords: syntax; agreement; disjunction; coordination http://hdl.handle.net/2142/8959 Title: Social Informatics of Elearning <br/> <br/>Authors: Haythornthwaite, Caroline A. <br/> <br/>Abstract / Summary: This paper presents the background, arguments and examples to support a social informatics of elearning. In more than 25 years of studies of information and communication technology, social informatics draws our attention to how technologies work in practice and in context. Extending the principles of social informatics to elearning requires attention to the history of IT implementation to identify parallels between IT and elearning development, and to use these to produce a foundation for educational informatics. These parallels suggest the usefulness of approaching elearning as an IT implementation, and learning from past experiences with large-scale IT change. Yet the case has not been made. Although a necessary and important component of elearning as a whole, as we have seen in the implementation of computer systems, lack of attention to social and technological impacts, and their co-evolution, leave us at a disadvantage for understanding organizational and institutional transformation. Thus, it is important to learn from IT development to inform elearning development. <br/> <br/>Keywords: elearning; social informatics; online learning; e-learning; learning http://hdl.handle.net/2142/8899 Title: Reassembling Writing Technologies: Historical and Situated Studies of Rhetorical Activity <br/> <br/>Authors: Van Ittersum, Derek <br/> <br/>Abstract / Summary: Through historical research on hypertextual, collaborative writing software and hardware in the 1960s and situated studies of writers’ digital memory and invention work in the present, this dissertation considers the emergent uses of technologies surrounding disruptive moments. Combining Bruno Latour’s actor-network theory with theories of mediated activity (Vygotsky, Wertsch, Engeström, Nardi), it uses historical and contemporary scenes to propose that the coordination of mediating technologies constitutes important rhetorical work. Breakdowns in literate practices lead to the opening of what Latour has called black boxes, which otherwise would conceal the mediating roles of artifacts, people, and ideologies. Thus, breakdowns provide opportunities to trace the connections between situated activity and wider social contexts. Reconsidering the history of Douglas Engelbart’s On-Line System (NLS) of the 1960s and 70s, I illustrate how the black-boxing of a specific group of technologies into the standard personal computer suppressed alternate configurations that were supported by writing theories strongly resembling those of the early process movement. Through interviews with, and observations of, writers today as they demonstrate their digital note-taking and bibliographic work, I explore the breakdowns they encounter in the course of adopting new technologies and examine how functional systems (consisting of institutions, conventions, people, and artifacts) shape and respond to these writers’ goals for their literate practices. The historical and contemporary case studies suggest that writers, teachers, and designers working within digital environments can benefit from increased consideration of the role of computing practices and artifacts in rhetorical work. <br/> <br/>Keywords: Rhetoric; Computers and writing; Engelbart, Douglas; Writing Studies http://hdl.handle.net/2142/8886 Title: Gait Regulation for Bipedal Locomotion <br/> <br/>Authors: Holm, Jonathan K. <br/> <br/>Abstract / Summary: This work explores regulation of forward speed, step length, and slope walking for the passive-dynamic class of bipedal robots. Previously, an energy-shaping control for regulating forward speed has appeared in the literature; here we show that control to be a special case of a more general time-scaling control that allows for speed transitions in arbitrary time. As prior work has focused on potential energy shaping for fully actuated bipeds, we study in detail the shaping of kinetic energy for bipedal robots, giving special treatment to issues of underactuation. Drawing inspiration from features of human walking, an underactuated kinetic-shaping control is presented that provides efficient regulation of walking speed while adjusting step length. Previous results on energetic symmetries of bipedal walking are also extended, resulting in a control that allows regulation of speed and step length while walking on any slope. Finally we formalize the optimal gait regulation problem and propose a dynamic programming solution seeded with passive-dynamic limit cycles. Observations of the optimal solutions generated by this method reveal further similarities between passive dynamic walking and human locomotion and give insight into the structure of minimum-effort controls for walking. <br/> <br/>Keywords: biped; robot; passive; walking; passive-dynamic; energy shaping; optimal; control http://hdl.handle.net/2142/8857 Title: Studies of Protein-Protein and Protein-Water Interactions by Small Angle X-Ray Scattering, Terahertz Spectroscopy, ASMOS, And Computer Simulation <br/> <br/>Authors: Kim, Seung Joong <br/> <br/>Abstract / Summary: The protein folding problem has been one of the most challenging subjects in biological physics due to its complexity. Energy landscape theory based on statistical mechanics provides a thermodynamic interpretation of the protein folding process. We have been working to answer fundamental questions about protein-protein and protein-water interactions, which are very important for describing the energy landscape surface of proteins correctly. At first, we present a new method for computing protein-protein interaction potentials of solvated proteins directly from SAXS data. An ensemble of proteins was modeled by Metropolis Monte Carlo and Molecular Dynamics simulations, and the global X-ray scattering of the whole model ensemble was computed at each snapshot of the simulation. The interaction potential model was optimized and iterated by a Levenberg-Marquardt algorithm. Secondly, we report that terahertz spectroscopy directly probes hydration dynamics around proteins and determines the size of the dynamical hydration shell. We also present the sequence and pH-dependence of the hydration shell and the effect of the hydrophobicity. On the other hand, kinetic terahertz absorption (KITA) spectroscopy is introduced to study the refolding kinetics of ubiquitin and its mutants. KITA results are compared to small angle X-ray scattering, tryptophan fluorescence, and circular dichroism results. We propose that KITA monitors the rearrangement of hydrogen bonding during secondary structure formation. Finally, we present development of the automated single molecule operating system (ASMOS) for a high throughput single molecule detector, which levitates a single protein molecule in a 10 µm diameter droplet by the laser guidance. I also have performed supporting calculations and simulations with my own program codes. <br/> <br/>Keywords: SAXS; Terahertz; Small angle X-Ray scattering; Simulation; KITA; THz; Protein-protein interaction; Biophysics; Protein-water interaction; hydration http://hdl.handle.net/2142/8790 Title: Bibliografía de la Gran Chiquitanía=Bibliography of the Gran Chiquitanía: A Guide to Materials Related to the Chiquitos Indigenous Group in Bolivia; ILLIPATHS No. 10 <br/> <br/>Authors: Harrison, Laura E. <br/> <br/>Abstract / Summary: The purpose of this pathfinder is to provide students with a list of selected works related to the Gran Chiquitanía, its citizens, and their history. The items compiled in this bibliography cover a wide range of topics including politics, history, literature, and social conditions. Also included are works dealing with agriculture, ecology, and music. Resources listed are articles, books, conference proceedings, sound recordings, theses and dissertations, and websites. Not all of the items are held by the University of Illinois Library, and while the bibliography is not comprehensive, it does serve as a starting point for researchers. This volume, No. 10, was largely compiled by searching the University of Illinois Library’s online catalog as well as WorldCat. The Library of Congress Subject Headings used to find these materials are listed on the next page. The resources found were complemented by those listed on the compact disc entitled Bibliografía Chiquitana: Inventario de títulos bibliográficos relacionados con la Chiquitanía, published by El Museo de Historia de Santa Cruz, La Organización Indígena de la Chiquitanía (OICH), and El Servicio Holandés de Cooperación al Desarrollo (SNV) in 2007. This disc, which also contains several photographs of the Chiquitos region and people, is itself included in the bibliography to augment the information available to researchers of the Gran Chiquitanía. A digital copy of this pathfinder will be sent to Dr. Jesús Muñoz Diez of the Universidad Católica Boliviana San Pablo at Chiquitos, to be added to their library, and to the Biblioteca y Archivo Nacional de Bolivia in Sucre. <br/> <br/>Keywords: Chiquito indians; Chiquitos (Bolivia : Province) http://hdl.handle.net/2142/8789 Title: Post Processing of Cone Penetration to Assess Seismic Ground Hazards, with Specific Application to the New Madrid Seismic Zone <br/> <br/>Authors: Liao, Tianfei; Mayne, Paul W. <br/> <br/>Abstract / Summary: The seismic cone penetration test (SCPTu) is the most efficient means for geotechnical site characterization and the evaluation of seismic ground hazards, as it provides up to 5 independent readings in a single sounding: cone tip stress (qT), sleeve friction (fs), penetration porewater pressure (ub), time rate of dissipation (t50), and downhole shear wave velocity (Vs). During SCPTu tests, a very large number of digital measurements are recorded. The overwhelming data provide more detailed information for engineering analysis, but also pose challenges in post-processing of “information overload”. In this thesis, software systems including ShearPro, ClusterPro, and InSituData, are developed to automate post processing of these SCPTu data. ShearPro is developed to automate the post-processing of the shear wave signals. ClusterPro uses the proposed threedimensional cluster analysis approach for soil stratification. InSituData facilitates the post processing of penetration data for seismic ground hazards analysis. A new threedimensional soil classification chart is also proposed in this thesis to help discern soil layers that may be subject to seismic ground hazards, such as loose liquefied sands and silty sands. These methods are then applied to SCPTu data collected at previously-identifed paleoliquefaction sites located in the New Madrid Seismic Zone (NMSZ). For liquefaction evaluation, the cyclic stress ratio (CSR) is computed using site response analysis by DeepSoil and a measured profile of shear waves derived from the 30-m SCPTU soundings and deep suspension loggings in AR and TN. The natural resistance of the soil to liquefaction, termed the cyclic resistance ratios (CRRs), is evaluated based on both deterministic procedures and probabilistic procedures. Based on liquefaction evaluation results at selected paleoliquefaction sites, regional CRR criteria for liquefaction are developed for the NMSZ. As even the latest major earthquakes in NMSZ occurred nearly 200 years ago, aging effects might be an important factor to consider in utilizing the liquefaction criteria to assess the seismic parameters associated with the previous earthquakes. The aging effects in the NMSZ were investigated through large scale blast-induced liquefaction tests conducted by the USGS and supplemented by the author by series of CPTs. Then a procedure to estimate seismic parameters associated with previous earthquakes is proposed. It utilizes both the liquefaction criteria based on SCPTu tests and the empirical attenuation relations developed for the corresponding regions. The approach is validated through data evaluation related to the 1989 Loma Prieta earthquakes in California and then applied to previous historic earthquakes in the NMSZ. <br/> <br/>Keywords: MAE Center; Cone; Penetration; Hazards; NMSZ