Keyphrases analysis of BIM standards through occurrence of most common BIM uses

The 8th PSU-UNS International Conference on Engineering and Technology (ICET-2017), Novi Sad, Serbia, June 8-10, 2017 University of Novi Sad, Faculty of Technical Sciences Abstract: Building Information Modeling (BIM) does not represent only the virtual model of the facility but a comperhensive approach consisting of technology, processes, stakeholders' behavior and accompanying standards.Given the fast evolution of BIM, this paper is analysing trends of development of BIM standards throughout the years by applying the keyphrases analysis method, for some of the most common BIM uses and recognizable phrases in BIM industry

Detection of Sociolinguistic Features in Digital Social Networks for the Detection of Communities

The emergence of digital social networks has transformed society, social groups, and institutions in terms of the communi cation and expression of their opinions. Determining how language variations allow the detection of communities, together with the relevance of specifc vocabulary (proposed by the National Council of Accreditation of Colombia (Consejo Nacional de Acreditación - CNA) to determine the quality evaluation parameters for universities in Colombia) in digital assemblages could lead to a better understanding of their dynamics and social foundations, thus resulting in better communication policies and intervention where necessary. The approach presented in this paper intends to determine what are the semantic spaces (sociolinguistic features) shared by social groups in digital social networks. It includes fve layers based on Design Science Research, which are integrated with Natural Language Processing techniques (NLP), Computational Linguistics (CL), and Artifcial Intelligence (AI). The approach is validated through a case study wherein the semantic values of a series of “Twit ter” institutional accounts belonging to Colombian Universities are analyzed in terms of the 12 quality factors established by CNA. In addition, the topics and the sociolect used by diferent actors in the university communities are also analyzed. The current approach allows determining the sociolinguistic features of social groups in digital social networks. Its application allows detecting the words or concepts to which each actor of a social group (university) gives more importance in terms of vocabular

Extracting Food Substitutes From Food Diary via Distributional Similarity

Genetic ancestry admixture of patients infected with Influenza A(H1N1)pdm09 sorted by African ancestry. Each individual ancestry is depicted as a column, whereas color represents the proportion of ancestry estimated for that individual (African = blue; European = brown; Native American = green). (A) Non-hospitalized patients and (B) Hospitalized patients

Knowledge Extraction and Visualization from Textual Sources Intended for Construction Project Management

Током животног циклуса инвестиционог пројекта ствара се велики корпус неструктуираних и полуструктуираних докумената. Традиционални приступи у складиштењу и организовању информација из неструктуираних податка су оријентисани на рад са документима, што их чини неподесним за анализу и издвајање знања. У неструктуираним документима је отежано прикупљање, анализа и поновно коришћење релевантних информација у интегралном облику, што може изазвати проблеме на пројекту услед неблаговремених или неодговарајућих одлука. У овој дисертацији је приказана репрезентација информација издвојених из неструктуираних текстуалних докумената у облику графа значајних фраза, који корисницима треба да омогући визуелизацију и анализу значајних чињеница на пројекту са минималном количином уложеног труда. Са циљем да се конструише доменски независна репрезентација са минималним трудом експерта за претходно конфигурисање, значајне фразе су детектоване у вишејезичном окружењу применом статистичких мера за одређивање корелисаности пара речи. Граф садржи аутоматски издвојене значајне фразе које су повезане на основу сличности семантичких контекста. Репрезентација је имплементирана у графовској бази података што корисницима омогућава да детектују и визуелизују различите скривене обрасце у подацима. Неинформативне фразе су филтриране кроз поступке одређивања ентропије скупа контекста и динамичности суседства фразе кроз више графова који представљају тренутке у времену. Приказана је хеуристика за издвајање комплексних концепата, заснована на итеративној процедури за детекцију блиских фраза које припадају истом семантичком подграфу. Могућности примене предложене репрезентације су демонстриране на графу конструисаном за постојећи корпус докумената са међународног инвестиционог пројекта.During a construction project lifecycle, an extensive corpus of unstructured or semi-structured text documents is generated. Traditional approaches for information storing and organizing are document-oriented, which is highly inconvenient for data analysis and knowledge extraction. The nature of unstructured sources impedes users’ acquisition, analysis, and reuse of relevant information, leading to possible negative effects in the project management process. This dissertation suggests a procedure for automatic extraction of relevant project concepts from unstructured text documents. Concepts are organized in the form of a key-phrase network, intended to provide users with the possibility to visualize and analyze valuable project facts with less effort. With the objective of constructing a domain-independent and language-independent key-phrase network, with minimal expert involvement for configuration, an approach to detect key phrases was examined by using measures of correlation for word pairs. A network contains key phrases automatically extracted from various types of unstructured documents, with relations based on the similarity of semantic contexts. The representation was implemented as a graph database, enabling project participants to extract and visualize various patterns in data. The problem of noisy key phrases was reduced by introducing the entropy score for a set of co-occurring contexts and the measure of phrase neighborhood dynamics throughout construction project lifecycle. A heuristic for extraction of complex concepts is presented, based on the iterative procedure for detection of adjacent key phrases belonging to a same semantic subnetwork. Possible applications, such as concept tracking through time or determination of communication patterns between project participants, is demonstrated using a key-phrase network generated for the existing document corpus from an international construction project

Appropriately Incorporating Statistical Significance in PMI

Two recent measures incorporate the notion of statistical significance in basic PMI formulation. In some tasks, we find that the new measures perform worse than the PMI. Our analysis shows that while the basic ideas in incorporating statistical significance in PMI are reasonable, they have been applied slightly inappropriately. By fixing this, we get new measures that improve performance over not just PMI but on other popular co-occurrence measures as well. In fact, the revised measures perform reasonably well compared with more resource intensive non co-occurrence based methods also.