A Decomposition Approach for a New Test-Scenario in Complex Problem Solving

Over the last years, psychological research has increasingly used computer-supported tests, especially in the analysis of complex human decision making and problem solving. The approach is to use computer-based test scenarios and to evaluate the performance of participants and correlate it to certain attributes, such as the participant's capacity to regulate emotions. However, two important questions can only be answered with the help of modern optimization methodology. The first one considers an analysis of the exact situations and decisions that led to a bad or good overall performance of test persons. The second important question concerns performance, as the choices made by humans can only be compared to one another, but not to the optimal solution, as it is unknown in general.\ud \ud Additionally, these test-scenarios have usually been defined on a trial-and-error basis, until certain characteristics became apparent. The more complex models become, the more likely it is that unforeseen and unwanted characteristics emerge in studies. To overcome this important problem, we propose to use mathematical optimization methodology not only as an analysis and training tool, but also in the design stage of the complex problem scenario.\ud \ud We present a novel test scenario, the IWR Tailorshop, with functional relations and model parameters that have been formulated based on optimization results. We also present a tailored decomposition approach to solve the resulting mixed-integer nonlinear programs with nonconvex relaxations and show some promising results of this approach

From the native’s point of view – or daddy-knows-best?

This paper discusses how a single approach or attempts to leave the specific socio-cultural setting out of the account can only distort our view of the extremely complex phenomenon 'religion'. The problem of understanding “the Other" arises as soon as we meet this other, but where the other seemed too much unlike ourselves, the demand became imperative, either to reject the other totally, or to find ways to communicate, that is, some form of understanding

Digital Compliance – legal tech as a driver for better prevention

Compliance and the prevention of law-breaking by compliance measures has become a business imperative in recent years. However, setting up a truly effective compliance programme remains a major challenge. The dynamic development of legal tech offers new possibilities with the increasing development of digital compliance measures or the digitalisation of existing measures. This article highlights the main fields in which such digital measures are relevant, taking into account not only the current status quo in practice, but also the opportunities that these measures offer and the difficulties that exist.O compliance e a prevenção da violação da lei por meio de medidas de compliance tornou-se um imperativo de negócios nos últimos anos. No entanto, a criação de um programa de conformidade verdadeiramente eficaz continua a ser um grande desafio. O desenvolvimento dinâmico da tecnologia jurídica oferece novas possibilidades com o desenvolvimento crescente de medidas de conformidade digital ou a digitalização das medidas existentes. Este artigo destaca os principais domínios em que tais medidas digitais são relevantes, tendo em conta não só o atual status quo na prática, mas também as oportunidades que estas medidas oferecem e as dificuldades existentes

Equality at the Cemetery Gates: Study of an African American Burial Ground

In Charlottesville, Virginia, the University Cemetery serves as the final resting place of many of the most prominent community members of the University of Virginia. In 2011, the University planned an expansion. During archaeological research to this end, sixty-seven previously unidentified interments, in both adult and child-sized grave shafts, were discovered on the proposed site of expansion, to the northeast of the University Cemetery. Further archival research revealed that “at least two late nineteenth century references note that enslaved African Americans were buried north of but outside the enclosed University, in an adjacent wooded area.” In one, Col. Charles Christian Wertenbaker recalls: “in old times, the University servants were buried on the north side of the cemetery, just outside of the wall.” Current research suggests that at least as late as 1898 the area of land was recognized as historically utilized by the University of Virginia for “servant” burials. Since these discoveries, a commemoration ceremony has been held. Some beautification measures have been undertaken: a specially designed fence has been installed; some trees have been planted; and at both entrances an informational sign is posted explaining the significance of the plot. Still, this newly rediscovered sacred space stands in stark contrast to the marble tombs and gilded cenotaphs of the University Cemetery and adjacent Confederate monument. Typically, descendants of the dead reserve rights in a cemetery in the form of some kind of property interest. Mourners and the children of mourners may return from time to time to pay their respects and tend to the graves of their dearly departed. In general, this is a well-established right (though further investigation will reveal that it somewhat less clear than one might expect). However, slavery in America has frustrated many rights, and its long shadow continues to disrupt others. Because of the nature of this property interest, today in Charlottesville, the cemetery rights of the descendants of those slaves interred to the northeast of the University Cemetery are arguably extinguished, or at best unclear. The owner of the cemetery, the University of Virginia, has made no attempt to exclude or to sell the land, nor likely would they, but it is unclear that they could not should they so desire. There are likely other slave cemeteries, on public and private land, that find themselves in a similar situation: specifically, slave cemeteries and African American burial grounds that, because of systemic oppression and discrimination, are rendered unprotected and abandoned—descendants’ rights vanished into nothing. In exploration of this problem, this paper lays out the historical legal landscape of cemeteries, the special issues that arise in slave cemeteries generally, and the application of these doctrines to the African American burial ground in Charlottesville. Additionally, it presents a suggested legal treatment of this special type of property interest: namely, that there should be legislative reform that, in the case of abandoned slave cemeteries, creates both a public easement allowing access and broad statutory standing so that communities can work together to maintain these sacred sites and police against desecration. Further, the development of the rights of sepulture in American common law and the accompanying legal solicitude would allow judges to read this regime into existence, even in absence of formal legislative measures

Nucleic acid assembly, polymerization, and ligand binding

In the past 30 years, the discovery of capabilities of nucleic acids far beyond their well-known information-bearing capacity has profoundly influenced our understanding of these polymers. The discovery by the Cech and Altman labs that nucleic acids could perform catalytic functions, coupled with the Gold and Szostak groups’ demonstration of the de novo evolution of nucleic acids that bind arbitrary ligands, has resulted in a proliferation of newfound roles for these molecules. Nucleic acids have found utility in both engineered systems, such as aptamer therapeutics, as well as in newly appreciated roles in extant organisms, such as riboswitches. As a result of these discoveries, many have pondered the potential importance of the dual (catalytic and informational) roles of nucleic acids in early evolution. A high-yielding synthetic route for the nonenzymatic polymerization of nucleic acids, based on the aqueous self-assembly of their components, would provide a powerful tool in nucleic acid chemistry, with potential utility in prebiotic and contemporary nucleic acid systems alike – however, such a route remains elusive. In this thesis, I describe several steps towards such a synthetic route. In these systems, a nucleic-acid binding ligand drives the assembly of short DNA and RNA duplexes, promoting the production of long nucleic acid polymers, while suppressing the production of short, cyclic species. Additionally, the use of a reversible covalent linkage allows for the production of long polymers, as well as the incorporation of previously cyclized products into these polymers. I also report several explorations of novel base pairings, nucleic acid-ligand interactions, and nucleic acid-ion interactions that have informed our studies of self-assembling nucleic acid systems.PhDCommittee Chair: Hud, Nicholas; Committee Member: France, Stefan; Committee Member: Lynn, David; Committee Member: Wartell, Roger; Committee Member: Williams, Lore

Developing personal learning networks through social media as an effective learning strategy across generational demographics

The changing world of technology and the increasing use of social media for learning are present among a multitude of identified generations. Adult learning and the approach to which learning is facilitated has changed greatly in recent years due to emerging technologies. This literature review presents evidence of each generation\u27s learning style. The integration of social media into learning environments supports Personal Learning Networks for any age demographic. This review of literature is based on published literature including peer-reviewed scholarly journals, books, and reputable websites. The reviewer found social media is not used equally among generational demographics. Social media\u27s impact to each generation depends on the relevance it has to each generation. It was found that further research is needed in regard to social media and Personal Learning Networks for each generation

Optimization as an analysis tool for human complex decision making

We present a problem class of mixed-integer nonlinear programs (MINLPs) with nonconvex continuous relaxations which stem from economic test scenarios that are used in the analysis of human complex problem solving. In a round-based scenario participants hold an executive function. A posteriori a performance indicator is calculated and correlated to personal measures such as intelligence, working memory, or emotion regulation. Altogether, we investigate 2088 optimization problems that differ in size and initial conditions, based on real-world experimental data from 12 rounds of 174 participants. The goals are twofold. First, from the optimal solutions we gain additional insight into a complex system, which facilitates the analysis of a participant’s performance in the test. Second, we propose a methodology to automatize this process by providing a new criterion based on the solution of a series of optimization problems. By providing a mathematical optimization model and this methodology, we disprove the assumption that the “fruit fly of complex problem solving,” the Tailorshop scenario that has been used for dozens of published studies, is not mathematically accessible—although it turns out to be extremely challenging even for advanced state-of-the-art global optimization algorithms and we were not able to solve all instances to global optimality in reasonable time in this study. The publicly available computational tool Tobago [TOBAGO web site https://sourceforge.net/projects/tobago] can be used to automatically generate problem instances of various complexity, contains interfaces to AMPL and GAMS, and is hence ideally suited as a testbed for different kinds of algorithms and solvers. Computational practice is reported with respect to the influence of integer variables, problem dimension, and local versus global optimization with different optimization codes

Spectroscopic Behavior of Composite, Black Thermal Paint, Solar Cell, and Multi-layered Insulation Materials in a GEO Simulated Environment

Materials currently populating Earth orbital regimes can be distinguished by comparing remote observational data to that of optical material measurements obtained in the laboratory. Experimentation for this research primarily involved the acquisition of spectroscopic measurements on materials of interest to the telescopic observational community for enhanced space situational awareness. Common spacecraft materials worthy of preeminent analysis for this investigation include a carbon-carbon (c-c) matrix composite, various black thermal paints, a GPS solar cell and three different cover glass components. These materials were subjected to a simulated geosynchronous Earth orbit (GEO) space environment with the intent of observing material optical property behavior over quantitative exposure time. The aforementioned materials have been measured in their pristine and GEO simulated exposed conditions. A reflectance spectrometer and a bi-directional reflectance distribution function (BRDF) optical system have been operated to perform material characterization, optical property analysis, and to further compare such data to telescopic observational data acquired on equal materials