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(9,781 - 9,800 of 10,079)
Pages
- Title
- On Exchangeability in Network Models, Special Volume in honor of memory of S.E.Fienberg
- Date
- 2019, 2019-04-12
- Description
-
We derive representation theorems for exchangeable distributions on finite and infinite graphs using elementary arguments based on geometric...
Show moreWe derive representation theorems for exchangeable distributions on finite and infinite graphs using elementary arguments based on geometric and graph-theoretic concepts. Our results elucidate some of the key differences, and their implications, between statistical network models that are finitely exchangeable and models that define a consistent sequence of probability distributions on graphs of increasing size.
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- Journal of Algebraic Statistics
- Title
- Cubature Rules and Expected Value of Some Complex Functions, Special Volume in honor of memory of S.E.Fienberg
- Date
- 2019, 2019-04-12
- Description
-
The expected value of some complex valued random vectors is computed by means of the indicator function of a designed experiment as known in...
Show moreThe expected value of some complex valued random vectors is computed by means of the indicator function of a designed experiment as known in algebraic statistics. The general theory is set-up and results are obtained for finite discrete random vectors and the Gaussian random vector. The precision space of some cubature rules/designed experiments is determined.
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- Journal of Algebraic Statistics
- Title
- Strongly Robust Toric Ideals in Codimension 2, Special Volume in honor of memory of S.E.Fienberg
- Date
- 2019, 2019-04-12
- Description
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A homogeneous ideal is robust if its universal Gr ?obner basis is also a minimal generating set. For toric ideals, one has the stronger...
Show moreA homogeneous ideal is robust if its universal Gr ?obner basis is also a minimal generating set. For toric ideals, one has the stronger definition: A toric ideal is strongly robust if its Graver basis equals the set of indispensable binomials. We characterize the codimension 2 strongly robust toric ideals by their Gale diagrams. This gives a positive answer to a question of Petrovi?, Thoma, and Vladoiu in the case of codimension 2 toric ideals.
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- Journal of Algebraic Statistics
- Title
- Mixture models for rating data: the method of moments via Groebner bases
- Date
- 2017, 2017-12-26
- Description
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A recent thread of research in ordinal data analysis involves a class of mixture models that designs the responses as the combination of the...
Show moreA recent thread of research in ordinal data analysis involves a class of mixture models that designs the responses as the combination of the two main aspects driving the decision pro- cess: a feeling and an uncertainty components. This novel paradigm has been proven flexible to account also for overdispersion. In this context, Groebner bases are exploited to estimate model parameters by implementing the method of moments. In order to strengthen the validity of the moment procedure so derived, alternatives parameter estimates are tested by means of a simulation experiment. Results show that the moment estimators are satisfactory per se, and that they significantly reduce the bias and perform more efficiently than others when they are set as starting values for the Expectation-Maximization algorithm.
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- Journal of Algebraic Statistics
- Title
- Unimodular hierarchical models and their Graver bases
- Date
- 2017, 2017-12-26
- Description
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Given a simplicial complex whose vertices are labeled with positive integers, one can associate a vector configuration whose corresponding...
Show moreGiven a simplicial complex whose vertices are labeled with positive integers, one can associate a vector configuration whose corresponding toric variety is the Zariski closure of a hierarchical model. We classify all the vertex-weighted simplicial complexes that give rise to unimodular vector configurations. We also provide a combinatorial characterization of their Graver bases.
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- Journal of Algebraic Statistics
- Title
- Moment Varieties of Gaussian Mixtures, AS2015 Special Issue articles: This issue includes a series of papers from talks, posters and collaborations resulting from and inspired by the Algebraic Statistics Conference held in Genoa, Italy, in June 2015. Special issue guest editors: Piotr Zwiernik and Fabio Rapallo.
- Date
- 2016, 2016-07-12
- Description
-
The points of a moment variety are the vectors of all moments up to some order, for a given family of probability distributions. We study the...
Show moreThe points of a moment variety are the vectors of all moments up to some order, for a given family of probability distributions. We study the moment varieties for mixtures of multivariate Gaussians. Following up on Pearson’s classical work from 1894, we apply current tools from computational algebra to recover the parameters from the moments. Our moment varieties extend objects familiar to algebraic geometers. For instance, the secant varieties of Veronese varieties are the loci obtained by setting all covariance matrices to zero. We compute the ideals of the 5-dimensional moment varieties representing mixtures of two univariate Gaussians, and we offer a comparison to the maximum likelihood approach.
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- Journal of Algebraic Statistics
- Title
- Algebraic geometry of Poisson regression, AS2015 Special Issue articles: This issue includes a series of papers from talks, posters and collaborations resulting from and inspired by the Algebraic Statistics Conference held in Genoa, Italy, in June 2015. Special issue guest editors: Piotr Zwiernik and Fabio Rapallo.
- Date
- 2016, 2016-07-12
- Description
-
Designing experiments for generalized linear models is difficult because optimal designs depend on unknown parameters. Here we investigate...
Show moreDesigning experiments for generalized linear models is difficult because optimal designs depend on unknown parameters. Here we investigate local optimality. We propose to study for a given design its region of optimality in parameter space. Often these regions are semi-algebraic and feature interesting symmetries. We demonstrate this with the Rasch Poisson counts model. For any given interaction order between the explanatory variables we give a characterization of the regions of optimality of a special saturated design. This extends known results from the case of no interaction. We also give an algebraic and geometric perspective on optimality of experimental designs for the Rasch Poisson counts model using polyhedral and spectrahedral geometry.
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- Journal of Algebraic Statistics
- Title
- Mold Report - Perlstein - 2015
- Date
- 2015,
- Description
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Scope of Work: The scope of work associated with this work is: Isolate the contaminated drywall, place a negative air unit in work area and...
Show moreScope of Work: The scope of work associated with this work is: Isolate the contaminated drywall, place a negative air unit in work area and exhaust to outside. In small pieces remove drywall, bag seal and transport to out of building in sealed manner. Clean remaining drywall and studs with fungicide, and paint with encapsulating fungicide paint. Any remaining non-contaminated building materials will remain. These items will be cleaned and treated with an approved biocide. When these materials are dry a sealant/encaplsulant will be applied to the material, if warranted. Wet wipe entire enclosure for inspection. Remove plastic barriers and replace any item moved for work. Housekeep area as leaving. Lock all doors and secure room(s).
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- IIT Mold Reports
- Title
- Professionalism Among Chinese Engineers: An Empirical Study
- Date
- 2019,
- Description
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Spreadsheet of answers from a questionnaire sent out in 2018-2019 to Chinese engineering students looking at their perceptions of professional...
Show moreSpreadsheet of answers from a questionnaire sent out in 2018-2019 to Chinese engineering students looking at their perceptions of professional and engineering ethics.
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- Center for the Study of Ethics in the Collection - "China's Unwritten Code of Ethics"
- Title
- Stephen Fienberg's influence on algebraic statistics, Special Volume in honor of memory of S.E.Fienberg
- Date
- 2019, 2019-04-12
- Description
-
Stephen (Steve) E. Fienberg (1942-2016) was an eminent statistician, whose impact on research, education and the practice of statistics, and...
Show moreStephen (Steve) E. Fienberg (1942-2016) was an eminent statistician, whose impact on research, education and the practice of statistics, and many other fields is astonishing in its breadth. He was a visionary when it came to linking many different areas to address real scientific issues. He professed the importance of statistics in many disciplines, but recognized that true interdisciplinary work requires joining of the expertise across different areas, and it is in this spirit that he helped steer algebraic statistics toward becoming a thriving subject. Many of his favorite topics in the area are covered in this special issue. We are grateful to all authors for contributing to this volume to honor him and his influence on the field. During the preparation of this issue, we learned about the tragic killing of his widow, Joyce Fienberg, during the Tree of Life Synagogue massacre in Pittsburgh, PA on October 27, 2018. This issue is dedicated to their memory.
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- Journal of Algebraic Statistics
- Title
- Fix it: Mending Workshop
- Date
- 2019, 2019
- Publisher
- ACRL
- Description
-
Book chapter from The Sustainable Library's Cookbook
- Title
- Mold Report - IIT Tower - 2017
- Date
- 2017,
- Description
-
STAT Analysis received 5 samples for the referenced project on 2/20/2017 10:44:00 AM. The analytical results are presented in the following...
Show moreSTAT Analysis received 5 samples for the referenced project on 2/20/2017 10:44:00 AM. The analytical results are presented in the following report.
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- IIT Mold Reports
- Title
- Mold Report - Tech South - 2017
- Date
- 2017,
- Description
-
Pepper Environmental Technologies, Inc. conducted a mold air sampling study at Illinois Institute of Technology, Technology South, 3440 S....
Show morePepper Environmental Technologies, Inc. conducted a mold air sampling study at Illinois Institute of Technology, Technology South, 3440 S. State St., Chicago, Illinois. The survey was performed on April 26, 2017 in response to a request by Matt Cusack, Maintenance Supervisor, Facilities Department. Mold air samples were collected outdoors, and second floor.
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- IIT Mold Reports
- Title
- Controlling biofilms using synthetic biology approaches
- Date
- 2020
- Description
-
Bacterial biofilms are formed by the complex but ordered regulation of intra- or inter-cellular communication,...
Show moreBacterial biofilms are formed by the complex but ordered regulation of intra- or inter-cellular communication, environmentally responsive gene expression, and secretion of extracellular polymeric substances. Given the robust nature of bio?lms due to the non-growing nature of bio?lm bacteria and the physical barrier provided by the extracellular matrix, eradicating bio?lms is a very di?cult task to accomplish with conventional antibiotic or disinfectant treatments. Synthetic biology holds substantial promise for controlling bio?lms by improving and expanding existing biological tools, introducing novel functions to the system, and re-conceptualizing gene regulation. This review summarizes synthetic biology approaches used to eradicate bio?lms via protein engineering of bio?lm-related enzymes, utilization of synthetic genetic circuits, and the development of functional living agents. Synthetic biology also enables bene?cial applications of bio?lms through the production of biomaterials and patterning bio?lms with speci?c temporal and spatial structures. Advances in synthetic biology will add novel bio?lm functionalities for future therapeutic, biomanufacturing, and environmental applications.
Sponsorship: NIH-R15AI130988, NSF CBET-1917130
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- Title
- Incorporation of non-standard amino acids into proteins: challenges, recent achievements, and emerging applications
- Date
- 2019
- Description
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The natural genetic code only allows for 20 standard amino acids in protein translation, but genetic code...
Show moreThe natural genetic code only allows for 20 standard amino acids in protein translation, but genetic code reprogramming enables the incorporation of non-standard amino acids (NSAAs). Proteins containing NSAAs provide enhanced or novel properties and open diverse applications. With increased attention to the recent advancements in synthetic biology, various improved and novel methods have been developed to incorporate single and multiple distinct NSAAs into proteins. However, various challenges remain in regard to NSAA incorporation, such as low yield and misincorporation. In this review, we summarize the recent efforts to improve NSAA incorporation by utilizing orthogonal translational system optimization, cell-free protein synthesis, genomically recoded organisms, artificial codon boxes, quadruplet codons, and orthogonal ribosomes, before closing with a discussion of the emerging applications of NSAA incorporation.
Sponsorship: NIH R15AI130988
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- Title
- Assessing Graduate Student Progress in Engineering Ethics
- Creator
- Davis, Michael, Feinerman, Alan
- Date
- 2010-11-10, 2011
- Publisher
- Springer
- Description
-
Under a grant from the National Science Foundation, the authors (and others) undertook to integrate ethics into...
Show moreUnder a grant from the National Science Foundation, the authors (and others) undertook to integrate ethics into graduate engineering classes at three universities—and to assess success in a way allowing comparison across classes (and institutions). This paper describes the attempt to carry out that assessment. Standard methods of assessment turned out to demand too much class time. Under pressure from instructors, the authors developed an alternative method that is both specific in content to individual classes and allows comparison across classes. Results are statistically significant for ethical sensitivity and knowledge. They show measurable improvement in a single semester.
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- Title
- Single Spool Magazine Tape Recorder
- Creator
- Camras, Marvin
- Date
- 1962-03-13
- Description
-
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
- Title
- Magnetic Recording Apparatus
- Creator
- Lang, Albert P.
- Date
- 1962-04-10
- Description
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Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
- Title
- Recording Apparatus
- Creator
- Lang, Albert P.
- Date
- 1962-09-11
- Description
-
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
- Title
- Metal Cladding Process and Products Resulting Therefrom
- Creator
- Rostoker, William, Domagala, Robert F.
- Date
- 1962-10-30
- Description
-
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
