Doctoral Consortium (IJCAI School)

POMDP planning for the creation of service packages

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The generation of complex systems where the user requires decisions based on several criteria involves building a relationship of global preference for a set of alternatives evaluated. Between these systems there are the Tourist Systems, that was impulse by internet like a facilitator in the access of different sources of information for travel planning. Currently, tourists should not only visit multiple independent Web sites (airlines, hotels, etc.) and await a considerable time receiving confirmation responses. All these actions required generating a stochastic system that can meet the services and generate plans. Are being studied POMDP algorithms, in order to obtain a method for packages tailored to user requirements. Under the hypothetical-deductive methodology, this includes the study of service pakage´s composition, application, comparison and validation by a computer prototype with real users for a Web Recommender System. This thesis is framed within a PICT project called "E-OASIS Integrated Travel Services to facilitate easy access to Local Cultural Heritage" whose technical objective is to develop a Customized Recommender System for Tourist Services in the Province of San Juan. The automatic planning in real world problems has become a subject of interest to the scientific community because it allows computationally establish courses of action in cases where a human cannot addressed adequately for the complexity. The motivation for this work focuses on two aspects of the automatic planning, the scientific contributions and its practice application. (Párrafo extraído del texto a modo de resumen)

FiPaWeb: method to reduce the complexity of web search

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) In this work the FiPaWeb method is proposed to group the pages; and at the same time keep the overlap between them; without losing information. The method has five stages. In the first stage the web search is performed. In the second stage the relevant pages are selected. In the third stage the value of each service is determined for each page. In the fourth stage the pages are grouped based on established criteria. Finally, in the fifth stage, the system accesses the groups that contain only the information requested by the user in a query. (Párrafo extraído del texto a modo de resumen)

PhD. Subject: Strategies to design life-long learning heuristic based algorithms

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) Nowadays combinatorial optimization problems arise in many circumstances, and we need to be able to solve these problems e ciently. Unfortunately, many of these problems are proven to be NP-hard, but problems can be related in some way. Analysing di erent combinatorial problems we can see some similarities between them. If we work with this similarities, we could improve the search process of an algorithm, because there exists some concurrent knowledge about solving a problem that could be exploited. For example, if an algorithm can solve an instance X for Sudoku puzzle ensuring uniqueness in blocks before rows and colums, this strategy can be useful for another instance Y when the algorithm is in a local optimum. In other words, some heuristics that can nd interesting candidate solutions can be reused in future during the execution of an algorithm. To do this, an algorithm should learn over time to determine how, when and which heuristic apply. The idea of this investigation is to create strategies to design life-long learning heuristic based algorithms. There have been some investigations in this area applied to 1-D Bin Packing problem, for Traveling Sales Problem and the most important thing, is that can be applied in different kinds of problem. (Párrafo extraído del texto a modo de resumen)

Towards a semantic-based process supervision

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) This thesis attempts to exploit the deductive capabilities of the semantic rea- soners to automate the supervision task through a knowledge-driven approach. With that aim, we have explored the characteristics of DL-based modeling and reasoning to support qualitative supervision methods. The emphasis have been placed in multivariate data analysis. Through them, failures are detected and diagnosed using patterns of qualitative symptoms (i.e. Fault Signatures) that involve several process variables.

Identification of collaborative skills with serious games

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) Collaborative skills are de ned as a subset of learned behaviors that involve people in interpersonal situations to get or keep strengthening the environment. If the collaborative skills of a group members is insu cient, individual behaviors might arise. These individual behaviors can negatively impact the performance of the group and prevent to achieve an adequate collaborative work. Collaborative skills are essential in the software development market, since the increasing complexity of applications causes the need of a coordinated work of teams to carry out the implementation of any project. (Párrafo extraído del texto a modo de resumen)

Prediction of frost location using machine learning and wireless sensor networks

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The damage caused by the frost takes place when the temperatures are below than a tolerable limit for the plants. Each phenological state, e.g owering, has a variable cold hardiness, so the lethal temperature is also variable. Freezing climatic events are the most dangerous, because they affect a large land surface. Mendoza is not an exception. According to the Instituto Nacional de Vitivinicultura (INV), in 2013 the loss of the vine crop reached up to 27%. Big part of that loss of yield was during the early spring. In order to study the micro-climate phenomenon of frost in Mendoza, sensors were distributed in the vine-yards vertically as well horizontally, because the air temperatures change vertically as horizontally, and the plant has also different cold hardiness in the organs like trunk, flowers, shoots. (Párrafo extraído del texto a modo de resumen)

Identifying relationship patterns inside communities

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) Community detection is an important problem for Computer and other sciences. Following Agarwal and Kempe one of the most important reasons to make clustering over a network is to identify the function/role of each element in a community. If the communities have hundreds or thousands of elements, it is important to understand the functions of internal elements, but that will require an automatic process. In this context, we propose to develop a model, capable to identify elements with common features in different communities, based on the connection between elements and communities, agreeing with Newman and Girvan model features. (Párrafo extraído del texto a modo de resumen)

Research statement: computational characterization of mental states: a natural language processing approach

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The goal of this plan is the development and use of machine-learning techniques to study massive-scale digital text corpora associated with cognitive processes, aiming at identifying the mental operations underlying behavioral processes. The goal is two fold: first, to decode the regularities in the corpora to infer generative rules of human thought, and second, to incorporate them in artificial intelligence models. (Párrafo extraído del texto a modo de resumen)

Research statement: inference of human-computing algorithms from massive-scale educational interventions

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The main goal of the present research statement is to develop an educational computerized framework able to detect in which tasks a child has difficulties and generate a personalized intervention based on automatic observation and evaluation of data, as part of an interdisciplinary project at the crossroads of Computer Science, Cognitive Science, Biology and Psychology. (Párrafo extraído del texto a modo de resumen)

Software agents for personalized training of collaborative e-learning teachers

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) In Computer Supported Collaborative Learning (CSCL) environments it is not enough to organize students in groups because interactions that originate the collaborative creation of knowledge do not happen spontaneously. Consequently, it is essential that e-tutors (teachers) promote interactions between students and coordinate discussions. To ease the workload (both temporal and cognitive) that supposes for teachers the coordination of discussions, software applications that give information about critical events of the interaction process have been developed so that teachers can intervene when group conflicts take place. Most e-tutors lack of experience with techniques of CSCL, but coordination skills of CSCL interactions belong to acquired skills category, it means this kind of skills can be developed through training processes. (Párrafo extraído del texto a modo de resumen)

From software architecture descriptions to object-oriented designs

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) Service-Oriented Architecture (SOA) is becoming a dominant approach for developing distributed enterprise-wide applications. One of the reasons for SOA’s extended use is its capacity to rapidly build applications by assembling alreadyimplemented and Internet-accessible services, which allows software organizations to hasten development of distributed applications and their consequent time-tomarket. However, this approach to develop SOA applications results unsuitable for particular organizations with high-priority and critical demands of internal control, security, flexibility, confidentiality and data integrity of their services, since the development of core functionality may be jeopardized by either uncertainty or changing environment. Although many efforts have focused mainly on facilitating discovering of services, and the outsourcing and reuse of them in SOA-based applications, little attention has been paid to aiding designers in developing services associated with business goals and quality-attribute properties. Moreover, quality-attribute properties of the service assemblies have been disregarded, which often leads to mismatches between the quality-attribute behavior prescribed by the SOA and the one resulting after its implementation. (Párrafo extraído del texto a modo de resumen)

Improving requirements with NLP techniques

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) Elaborating “good” requirements specifications is an important factor for the success of a software project. Requirements are normally expressed using textual descriptions in natural language, but not without problems. Some requirements documentation techniques, such as use cases specifications, often focus on functionality and leave many concerns understated in the text and scattered through several documents. These concerns, commonly known as crosscutting or architecturally-relevant concerns, often come from business goals or quality attributes that must be clearly identified by analysts and developers, as these concerns can have a far-reaching effect in the development process. Not treating these concerns at early development stages can lead to poor design solutions that become difficult (and costly) to fix afterwards. Unfortunately, searching for concerns in textual requirements is a difficult and time-consuming task for analysts, because requirements are often poorly modularized and there is text duplicated across documents. (Párrafo extraído del texto a modo de resumen)

Using ontology to mine and classify Li-Fraumeni Syndrom patients

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The Li-Fraumeni Syndrome (LFS) is a syndrome that causes multiple primary tumors in children and young adults. The main motivation of this work is to create a single integrated system that allows doctors and researchers from the A.C. Camargo Cancer Center to relate family histories, clinical and molecular data present in di erent databases through an innovative data integration methodology in order to improve the existing LFS diagnose criteria, or even to propose a new set of clinical criteria. (Párrafo extraído del texto a modo de resumen)

A user profiling approach to optomize the production of architectural documentation

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) The Software Architecture Document (SAD) is a key artifact in the early stages of software development, as it serves to share the architectural knowledge among the key project stakeholders and to keep record of the main design decisions for satisfying the stakeholders’ concerns. Even the best architectural solution could fail its purpose if it is not properly documented, distributed and understood by the stakeholders. However, documenting an architecture is a non-trivial and time-consuming activity, usually performed with limited resources. Thus, documenting a SAD should be planned to ensure that the invested efforts are worth the cost in terms of SAD quality. (Párrafo extraído del texto a modo de resumen)

Solving motion planning problems

Wed, 01 Jan 2014 00:00:00 GMT

Objeto de conferencia XLIII Jornadas Argentinas de Informática e Investigación Operativa (43JAIIO)-Doctoral Consortium (IJCAI) (Buenos Aires, 2014) This work considers a family of motion planning problems with movable blocks. Such problem is de ned by a maze grid occupied by immovable blocks (walls) and free squares. There are k movable blocks (stones) and k fixed goal squares. The man is a movable block that can traverse free squares and move stones between them. The problem goal is to move the stones from their initial positions to the goal squares with the minimum number of stone moves. (Párrafo extraído del texto a modo de resumen)