Publications

@article{martinovski_framework_2006,

title = {Framework for analysis of mitigation in courts},

author = {Bilyana Martinovski},

url = {http://ict.usc.edu/pubs/Framework%20for%20analysis%20of%20mitigation%20in%20courts.pdf},

year  = {2006},

date = {2006-01-01},

journal = {Journal of Pragmatics},

abstract = {This paper presents an activity-based framework for empirical discourse analysis of mitigation in public environments such as Swedish and Bulgarian courtroom examinations. Mitigation is defined as a pragmatic, cognitive and linguistic behavior the main purpose of which is reduction of vulnerability. The suggested framework consists of mitigation processes, which involve mitigating argumentation lines, defense moves, and communicative acts. The functions of mitigation are described in terms of the participants' actions and goals separately from politeness strategies. The conclusions and observations address two things: issues related to the pragmatic theory of communication especially mitigation and issues related to the trial as a social activity. For instance, non-turn-taking confirmations by examiners are often followed by volunteered utterances, which in some cases may be examples of 'rehearsed' testimonies. At the same time the witnesses' tendency to volunteer information even on the behalf of their own credibility indicates that they also favor pro-party testimonies. Despite the objective judicial role of the prosecutor or judge and/or despite the examiners accommodating style the verbal behavior of the witnesses exhibits constant anticipation of danger.},

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pubstate = {published},

tppubtype = {article}

}

@article{parsons_better_2006,

title = {Better quality of life with neuropsychological improvement on HAART},

author = {Thomas D. Parsons and Alyssa J. Braaten and Colin D. Hall and R. Kevin Robertson},

url = {http://ict.usc.edu/pubs/Better%20quality%20of%20life%20with%20neuropsychological%20improvement%20on%20HAART.pdf},

year  = {2006},

date = {2006-01-01},

journal = {Health and Quality of Life Outcomes},

volume = {4},

number = {11},

abstract = {Background: Successful highly active antiretroviral therapy (HAART) regimens have resulted in substantial improvements in the systemic health of HIV infected persons and increased survival times. Despite increased systemic health, the prevalence of minor HIV-associated cognitive impairment appears to be rising with increased longevity, and it remains to be seen what functional outcomes will result from these improvements. Cognitive impairment can dramatically impact functional ability and day-to-day productivity. We assessed the relationship of quality of life (QOL) and neuropsychological functioning with successful HAART treatment. Methods: In a prospective longitudinal study, subjects were evaluated before instituting HAART (naïve) or before changing HAART regimens because current therapy failed to maintain suppression of plasma viral load (treatment failure). Subjects underwent detailed neuropsychological and neurological examinations, as well as psychological evaluation sensitive to possible confounds. Re-evaluation was performed six months after institution of the new HAART regimen and/or if plasma viral load indicated treatment failure. At each evaluation, subjects underwent ultrasensitive HIV RNA quantitative evaluation in both plasma and cerebrospinal fluid. Results: HAART successes performed better than failures on measures exploring speed of mental processing (p textbackslashtextbackslashtextbackslashtextbackslashtextless .02). HAART failure was significantly associated with increased self-reports of physical health complaints (p textbackslashtextbackslashtextbackslashtextbackslashtextless .01) and substance abuse (p textbackslashtextbackslashtextbackslashtextbackslashtextless .01). An interesting trend emerged, in which HAART failures endorsed greater levels of psychological and cognitive complaints (p = 06). Analysis between neuropsychological measures and QOL scores revealed significant. correlation between QOL Total and processing speed (p textbackslashtextbackslashtextbackslashtextbackslashtextless .05), as well as flexibility (p textbackslashtextbackslashtextbackslashtextbackslashtextless .05). Conclusion: Our study investigated the relationship between HIV-associated neurocognitive impairment and quality of life. HAART failures experienced slower psychomotor processing, and had increased self-reports of physical health complaints and substance abuse. Contrariwise, HAART successes experienced improved mental processing, demonstrating the impact of successful treatment on functioning. With increasing life expectancy for those who are HIV seropositive, it is important to measure cognitive functioning in relation to the actual QOL these individuals report. The study results have implications for the optimal management of HIV-infected persons. Specific support or intervention may be beneficial for those who have failed HAART in order to decrease substance abuse and increase overall physical health.},

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pubstate = {published},

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}

@article{gold_effectiveness_2006,

title = {Effectiveness of Virtual Reality for Pediatric Pain Distraction during IV Placement},

author = {Jeffrey I. Gold and Seok Hyeon Kim and Alexis J. Kant and Michael H. Joseph and Albert Rizzo},

url = {http://ict.usc.edu/pubs/Effectiveness%20of%20Virtual%20Reality%20for%20Pediatric%20Pain%20Distraction%20during%20IV%20Placement.pdf},

year  = {2006},

date = {2006-01-01},

journal = {CyberPsychology and Behavior},

volume = {9},

number = {2},

pages = {207–212},

abstract = {The objective of this study was to test the efficacy and suitability of virtual reality (VR) as apain distraction for pediatric intravenous (IV) placement. Twenty children (12 boys, 8 girls) requiring IV placement for a magnetic resonance imaging/computed tomography (MRI/CT) scan were randomly assigned to two conditions: (1) VR distraction using Street Luge(5DT), presented via a head-mounted display, or (2) standard of care (topical anesthetic) with no distraction. Children, their parents, and nurses completed self-report questionnaires that assessed numerous health-related outcomes. Responses from the Faces Pain Scale–Revisedindicated a fourfold increase in affective pain within the control condition; by contrast, nosignificant differences were detected within the VR condition. Significant associations between multiple measures of anticipatory anxiety, affective pain, IV pain intensity, and measures of past procedural pain provided support for the complex interplay of a multimodalassessment of pain perception. There was also a sufficient amount of evidence supportingthe efficacy of Street Luge as a pediatric pain distraction tool during IV placement: an adequate level of presence, no simulator sickness, and significantly more child-, parent-, and nurse-reported satisfaction with pain management. VR pain distraction was positively endorsed by all reporters and is a promising tool for decreasing pain, and anxiety in childrenundergoing acute medical interventions. However, further research with larger sample sizesand other routine medical procedures is warranted.},

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pubstate = {published},

tppubtype = {article}

}

@article{morie_development_2005,

title = {Development of a Data Management Tool for Investigating Multivariate Space and Free Will Experiences},

author = {Jacquelyn Morie and Kumar Iyer and Donat-Pierre Luigi and Josh Williams and Aimee Dozois and Albert Rizzo},

url = {http://ict.usc.edu/pubs/Development%20of%20a%20Data%20Management%20Tool%20for%20Investigating%20Multivariate%20Space%20and%20Free%20Will%20Experiences%20in%20Virtual%20Reality.pdf},

year  = {2005},

date = {2005-09-01},

journal = {Applied Psychophysiology and Biofeedback},

volume = {30},

number = {3},

pages = {319–331},

abstract = {While achieving realism has been a main goal in making convincing virtual reality (VR) environments, just what constitutes realism is still a question situated firmly in the research domain. VR has become mature enough to be used in therapeutic applications such as clinical exposure therapy with some success. We now need detailed scientific investigations to better understand why VR works for these types of cases, and how it could work for other key applications such as training. Just as in real life, it appears that the factors will be complex and multi-variate, and this plethoric situation presents exceptional challenges to the VR researcher. We would not want to lessen VR’s ability to replicate real world conditions in order to more easily study it, however, for by doing so we may compromise the very qualities that comprise its effectiveness. What is really needed are more robust tools to instrument, organize, and visualize the complex data generated by measurements of participant experiences in a realistic virtual world. We describe here our first study in an ongoing program of effective virtual environment research, the types of data we are dealing with, and a specific tool we have been compelled to create that allows us some measure of control over this data. We call this tool Phloem, after the botanical channels that plants use to transport, support and store nutrients.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{kwon_unsupervised_2005,

title = {Unsupervised Speaker Indexing Using Generic Models},

author = {Soon-il Kwon and Shrikanth Narayanan},

url = {http://ict.usc.edu/pubs/Unsupervised%20Speaker%20Indexing%20Using%20Generic%20Models.pdf},

year  = {2005},

date = {2005-09-01},

journal = {IEEE Transactions on Speech and Audio Processing},

volume = {13},

number = {5},

pages = {1004–1013},

abstract = {Unsupervised speaker indexing sequentially detects points where a speaker identity changes in a multispeaker audio stream, and categorizes each speaker segment, without any prior knowledge about the speakers. This paper addresses two chal- lenges: The first relates to sequential speaker change detection. The second relates to speaker modeling in light of the fact that the number/identity of the speakers is unknown. To address this issue, a predetermined generic speaker-independent model set, called the sample speaker models (SSM), is proposed. This set can be useful for more accurate speaker modeling and clustering without requiring training models on target speaker data. Once a speaker-independent model is selected from the generic sample models, it is progressively adapted into a specific speaker-depen- dent model. Experiments were performed with data from the Speaker Recognition Benchmark NIST Speech corpus (1999) and the HUB-4 Broadcast News Evaluation English Test material (1999). Results showed that our new technique, sampled using the Markov Chain Monte Carlo method, gave 92.5% indexing accuracy on two speaker telephone conversations, 89.6% on four-speaker conversations with the telephone speech quality, and 87.2% on broadcast news. The SSMs outperformed the universal background model by up to 29.4% and the universal gender models by up to 22.5% in indexing accuracy in the experiments of this paper.},

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pubstate = {published},

tppubtype = {article}

}

@article{gratch_evaluating_2005,

title = {Evaluating a computational model of emotion},

author = {Jonathan Gratch and Stacy C. Marsella},

url = {http://ict.usc.edu/pubs/Evaluating%20a%20computational%20model%20of%20emotion.pdf},

year  = {2005},

date = {2005-07-01},

journal = {Journal Autonomous Agents and Multi-Agent Systems. Special Issue on the Best of AAMAS 2004},

volume = {11},

number = {1},

pages = {23–43},

abstract = {Spurred by a range of potential applications, there has been a growing body of research in computational models of human emotion. To advance the development of these models, it is critical that we evaluate them against the phenomena they purport to model. In this paper, we present one method to evaluate an emotion model that compares the behavior of the model against human behavior using a standard clinical instrument for assessing human emotion and coping. We use this method to evaluate the Emotion and Adaptation (EMA) model of emotion Gratch and Marsella. The evaluation highlights strengths of the approach and identifies where the model needs further development.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{grote_threats_2005,

title = {Threats to the Livelihood of the Forensic Neuropsychological Practice: Avoiding Ethical Misconduct},

author = {Christopher L. Grote and Thomas D. Parsons},

url = {http://ict.usc.edu/pubs/Threats%20to%20the%20Livelihood%20of%20the%20Forensic%20Neuropsychological%20Practice-%20Avoiding%20Ethical%20Misconduct.pdf},

doi = {10.1300/J151v04n03_06},

year  = {2005},

date = {2005-01-01},

journal = {Journal of Forensic Neuropsychology},

volume = {4},

number = {3},

pages = {79–93},

abstract = {We review six diverse issues that have the potential of devaluing our profession, in that ethical missteps could lead to the perception or reality that the work of forensic neuropsychologists is "for sale." By resisting temptations or overtures to engage in inappropriate conduct, such as attacking colleagues or failing to recognize how our own biases might influence our behavior or opinions, neuropsychologists strive to create a work product that enhances the reputation of our profession and makes a positive contribution to the public-at-large.},

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pubstate = {published},

tppubtype = {article}

}

@article{parsons_gender_2005,

title = {Gender Differences and Cognition Among Older Adults},

author = {Thomas D. Parsons and Albert Rizzo and Cheryl Zaag and Jocelyn McGee and John Galen Buckwalter},

url = {http://ict.usc.edu/pubs/Gender%20Differences%20and%20Cognition%20Among%20Older%20Adults.pdf},

year  = {2005},

date = {2005-01-01},

journal = {Aging, Neuropsychology, and Cognition},

volume = {12},

pages = {78–88},

abstract = {The more replicated findings about gender difference in cognitive performance suggest female superiority on visuomotor speed and language ability and male superiority on mechanical and visuospatial tasks. Generally, group strengths found in the early school years become more established at adolescence and remain stable through adulthood. The current study tested whether the patterns established in the early years remained among 30 adult subjects. We also utilized a series of exploratory analyses to determine if observed gender differences were impacted by the covariance present between all cognitive tests. Results suggest that although the patterns established in the early years remain stable through time for males, the established patterns for females are altered with age. Our findings are compelling in supporting a male advantage on visuospatial tasks among older adults. These findings are discussed in terms of common variance between test instruments as a possible source of difference. Our finding that the gender effect tended to increase when common variance was controlled argues that this methodology may enhance the ability to detect domain specific effects.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{robertson_assessment_2005,

title = {Assessment of neuroAIDS in Africa},

author = {R. Kevin Robertson and Jens Mielke and Kuku Appiah and Colin D. Hall and Richard W. Price and Johnstone Kumwenda and Cecelia Kanyama and Farida Amod and Christina Marra and Terrie Taylor and Umesh Lalloo and Jennifer Jelsma and Penny Holding and Michael Boivin and Gretchen Birbeck and Noeline Nakasujja and Ian Sanne and Thomas D. Parsons and Amanda Parente and Karen A. Tucker},

url = {http://ict.usc.edu/pubs/Assessment%20of%20neuroAIDS%20in%20Africa.pdf},

year  = {2005},

date = {2005-01-01},

journal = {Journal of NeuroVirology},

volume = {11},

number = {S1},

pages = {7–16},

abstract = {In June of 2004, the Center for AIDS Mental Health Research, National Institute of Mental Health sponsored a conference on the Assessment of NeuroAIDS in Africa, which was held in Blantrye, Malawai. The conference presentations summarized here highlight the need for research on NeuroAIDS in Africa and methods for assessing HIV-related neurological diseases (Robertson, 2004).},

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pubstate = {published},

tppubtype = {article}

}

@article{gratch_lessons_2005,

title = {Lessons from Emotion Psychology for the Design of Lifelike Characters},

author = {Jonathan Gratch and Stacy C. Marsella},

url = {http://ict.usc.edu/pubs/Lessons%20from%20Emotion%20Psychology%20for%20the%20Design%20of%20Lifelike%20Characters.pdf},

year  = {2005},

date = {2005-01-01},

journal = {Applied Artificial Intelligence Journal},

volume = {19},

pages = {215–233},

abstract = {This special issue describes a number of applications that utilize lifelike characters that teach indirectly, by playing some role in a social interaction with a user. The design of such systems reflects a compromise between competing, sometimes unarticulated de- mands: they must realistically exhibit the behaviors and characteristics of their role, they must facilitate the desired learning, and they must work within the limitations of current technology, and there is little theoretical or empirical guidance on the impact of these compromises on learning. Our perspective on this problem is shaped by our interest in the role of emotion and emotional behaviors in such forms of learning. In recent years, there has been an explosion of interest in the role of emotion in the design of virtual hu- mans. The techniques and motivations underlying these various efforts can seem, from an outsider's perspective, as bewildering and multifaceted as the concept of emotion itself is generally accused of being. Drawing on insights from emotion psychology, this article attempts to clarify for the designers of educational agents the various theoretical perspec- tives on the concept of emotion with the aim of giving guidance to designers of educa- tional agents.},

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pubstate = {published},

tppubtype = {article}

}

@article{gordon_fictionalization_2005,

title = {The Fictionalization of Lessons Learned},

author = {Andrew S. Gordon},

url = {http://ict.usc.edu/pubs/The%20Fictionalization%20of%20Lessons%20Learned.pdf},

year  = {2005},

date = {2005-01-01},

journal = {IEEE Multimedia},

volume = {12},

number = {4},

pages = {12–14},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{gordon_formalizations_2004,

title = {Formalizations of Commonsense Psychology},

author = {Andrew S. Gordon and Jerry R. Hobbs},

url = {http://ict.usc.edu/pubs/Formalizations%20of%20Commonsense%20Psychology.pdf},

year  = {2004},

date = {2004-01-01},

journal = {AI Magazine},

volume = {24},

number = {5},

pages = {49–62},

abstract = {The central challenge in commonsense knowledge representation research is to develop content theories that achieve a high degree of both competency and coverage. We describe a new methodology for constructing formal theories in commonsense knowledge domains that complements traditional knowledge representation approaches by first addressing issues of coverage. We show how a close examination of a very general task (strategic planning) leads to a catalog of the concepts and facts that must be encoded for general commonsense reasoning. These concepts are sorted into a manageable number of coherent domains, one of which is the representational area of commonsense human memory. We then elaborate on these concepts using textual corpus-analysis techniques, where the conceptual distinctions made in natural language are used to improve the definitions of the concepts that should be expressible in our formal theories. These representational areas are then analyzed using more traditional knowledge representation techniques, as demonstrated in this article by our treatment of commonsense human memory.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{traum_issues_2004,

title = {Issues in Multiparty Dialogues},

author = {David Traum},

editor = {F. Dignum},

url = {http://ict.usc.edu/pubs/Issues%20in%20Multiparty%20Dialogues.pdf},

year  = {2004},

date = {2004-01-01},

journal = {Advances in Agent Communication},

abstract = {This article examines some of the issues in representation of, processing, and automated agent participation in natural language dialgue, considering expansion from two-party dialogue to multi-party dialogue. These issues include some regarding the roles agents play in dialogue, interactive factors, and content management factors.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{parsons_sex_2004,

title = {Sex differences in mental rotation and spatial rotation in a virtual environment},

author = {Thomas D. Parsons and Peter Larson and Kris Kratz and Marcus Thiebaux and Brendon Bluestein and John Galen Buckwalter and Albert Rizzo},

url = {http://ict.usc.edu/pubs/Sex%20differences%20in%20mental%20rotation%20and%20spatial%20rotation%20in%20a%20virtual%20environment.pdf},

doi = {10.1016/j.neuropsychologia.2003.08.014},

year  = {2004},

date = {2004-01-01},

journal = {Neuropsychologia},

volume = {42},

pages = {555–562},

abstract = {The visuospatial ability referred to as mental rotation has been shown to produce one of the largest and most consistent sex differences, in favor of males, in the cognitive literature. The current study utilizes both a paper-and-pencil version of the mental rotations test (MRT) and a virtual environment for investigating rotational ability among 44 adult subjects. Results replicate sex differences traditionally seen on paper-and-pencil measures, while no sex effects were observed in the virtual environment. These findings are discussed in terms of task demands and motor involvement. Sex differences were also seen in the patterns of correlations between rotation tasks and other neuropsychological measures. Current results suggest men may rely more on left hemisphere processing than women when engaged in rotational tasks. © 2003 Elsevier Ltd. All rights reserved.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{parsons_backpropagation_2004,

title = {Backpropagation and Regression: Comparative Utility for Neuropsychologists},

author = {Thomas D. Parsons and Albert Rizzo and John Galen Buckwalter},

url = {http://ict.usc.edu/pubs/Backpropagation%20and%20Regression-%20Comparative%20Utility%20for%20Neuropsychologists.pdf},

year  = {2004},

date = {2004-01-01},

journal = {Journal of Clinical and Experimental Neuropsychology},

volume = {26},

number = {1},

pages = {95–104},

abstract = {The aim of this research was to compare the data analytic applicability of a backpropagated neural network with that of regression analysis. Thirty individuals between the ages of 64 and 86 (Mean age = 73.6; Mean years education = 15.4; % women = 50) participated in a study designed to validate a new test of spatial ability administered in virtual reality. As part of this project a standard neuropsychological battery was administered. Results from the multiple regression model (R2 = .21, p textbackslashtextbackslashtextbackslashtextbackslashtextless .28; Standard Error = 18.01) were compared with those of a backpropagated ANN (R2 = .39, p textbackslashtextbackslashtextbackslashtextbackslashtextless .02; Standard Error = 13.07). This 18% increase in prediction of a common neuropsychological problem demonstrated that an ANN has the potential to outperform a regression.},

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pubstate = {published},

tppubtype = {article}

}

@article{gratch_domain-independent_2004,

title = {A Domain-independent Framework for Modeling Emotion},

author = {Jonathan Gratch and Stacy C. Marsella},

url = {http://ict.usc.edu/pubs/A%20Domain-independent%20Framework%20for%20Modeling%20Emotion.pdf},

year  = {2004},

date = {2004-01-01},

journal = {Journal of Cognitive Systems Research},

volume = {5},

number = {4},

pages = {269–306},

abstract = {In this article, we show how psychological theories of emotion shed light on the interaction between emotion and cognition, and thus can inform the design of human-like autonomous agents that must convey these core aspects of human behavior. We lay out a general computational framework of appraisal and coping as a central organizing principle for such systems. We then discuss a detailed domain-independent model based on this framework, illustrating how it has been applied to the problem of generating behavior for a significant social training application. The model is useful not only for deriving emotional state, but also for informing a number of the behaviors that must be modeled by virtual humans such as facial expressions, dialogue management, planning, reacting, and social understanding. Thus, the work is of potential interest to models of strategic decision-making, action selection, facial animation, and social intelligence.},

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pubstate = {published},

tppubtype = {article}

}

@article{parsons_pregnancy_2004,

title = {Pregnancy History and Cognition During and After Pregnancy},

author = {Thomas D. Parsons and E. Thompson and John Galen Buckwalter and Brendon Bluestein},

url = {http://ict.usc.edu/pubs/Pregnancy%20History%20and%20Cognition%20During%20and%20After%20Pregnancy.pdf},

doi = {10.1080/00207450490475544},

issn = {0020-7454},

year  = {2004},

date = {2004-01-01},

journal = {International Journal of Neuroscience},

volume = {114},

pages = {1099–1110},

abstract = {An increasing body of literature confirms anecdotal reports that cognitive changes occur during pregnancy. This article assessed whether prior pregnancy, which alters a woman's subsequent hormonal environment, is associated with a specific cognitive profile during and after pregnancy. Seven primigravids and nine multigravids were compared, equivalent for age and education. No differences between groups were found during pregnancy. After delivery, multigravids performed better than primigravids on verbal memory tasks. After controlling for mood, a significant difference in verbal memory remained. A neuroadaptive mechanism may develop after first pregnancy that increases the ability to recover from some cognitive deficits after later pregnancies.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{gordon_representation_2004,

title = {The Representation of Planning Strategies},

author = {Andrew S. Gordon},

url = {http://ict.usc.edu/pubs/The%20Representation%20of%20Planning%20Strategies.PDF},

year  = {2004},

date = {2004-01-01},

journal = {Artificial Intelligence},

volume = {153},

pages = {287–305},

abstract = {An analysis of strategies, recognizable abstract patterns of planned behavior, highlights the difference between the assumptions that people make about their own planning processes and the representational commitments made in current automated planning systems. This article describes a project to collect and represent strategies on a large scale to identify the representational components of our commonsense understanding of intentional action. Three hundred and seventy-two strategies were collected from ten different planning domains. Each was represented in a pre-formal manner designed to reveal the assumptions that these strategies make concerning the human planning process. The contents of these representations, consisting of nearly one thousand unique concepts, were then collected and organized into forty-eight groups that outline the representational requirements of strategic planning systems.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{gratch_fight_2003,

title = {Fight the Way You Train:The Role and Limits of Emotions in Training for Combat},

author = {Jonathan Gratch and Stacy C. Marsella},

url = {http://ict.usc.edu/pubs/Fight%20the%20Way%20You%20Train-The%20Role%20and%20Limits%20of%20Emotions%20in%20Training%20for%20Combat.pdf},

year  = {2003},

date = {2003-06-01},

journal = {Brown Journal of World Affairs},

volume = {X},

pages = {63–76},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{uhrmacher_agent-oriented_2003,

title = {Agent-Oriented Simulation},

author = {Adelinde Uhrmacher and William Swartout},

url = {http://link.springer.com/chapter/10.1007/978-1-4419-9218-5_10},

year  = {2003},

date = {2003-01-01},

journal = {Applied System Simulation},

pages = {215–239},

abstract = {Metaphors play a key role in computer science and engineering. Agents bring the notion of locality of information (as in object-oriented programming) together with locality of intent or purpose. The relation between multi-agent and simulation systems is multi-facetted. Simulation systems are used to evaluate software agents in virtual dynamic environments. Agents become part of the model design, if autonomous entities in general, and human or social actors in particular shall be modeled. A couple of research projects shall illuminate some of these facets.},

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pubstate = {published},

tppubtype = {article}

}