Verslo procesų prognozavimo ir imitavimo taikant sisteminių įvykių žurnalų analizės metodus tyrimas

Business process (BP) analysis is one of the core activities in organisations that lead to improvements and achievement of a competitive edge. BP modelling and simulation are one of the most widely applied methods for analysing and improving BPs. The analysis requires to model BP and to apply analysis techniques to the models to answer queries leading to improvements. The input of the analysis process is BP models. The models can be in the form of BP models using industry-accepted BP modelling languages, mathematical models, simulation models and others. The model creation is the most important part of the BP analysis, and it is both time-consuming and costly activity. Nowadays most of the data generated in the organisations are electronic. Therefore, the re-use of such data can improve the results of the analysis. Thus, the main goal of the thesis is to improve BP analysis and simulation by proposing a method to discover a BP model from an event log and automate simulation model generation. The dissertation consists of an introduction, three main chapters and general conclusions. The first chapter discusses BP analysis methods. In addition, the process mining research area is presented, the techniques for automated model discovery, model validation and execution prediction are analysed. The second part of the chapter investigates the area of BP simula-tion. The second chapter of the dissertation presents a novel method which automatically discovers Bayesian Belief Network from an event log and, furthermore, automatically generates BP simulation model. The discovery of the Bayesian Belief Network consists of three steps: the discovery of a directed acyclic graph, generation of conditional probability tables and their combination. The BP simulation model is generated from the discovered directed acyclic graph and uses the belief network inferences during the simulation to infer the execution of the BP and to generate activity data dur-ing the simulation. The third chapter presents the experimental research of the proposed network and discusses the validity of the research and experiments. The experiments use selected logs that exhibit a wide array of behaviour. The experiments are performed in order to test the discovery of the graphs, the inference of the current process instance execution probability, the predic-tion of the future execution of the process instances and the correctness of the simulation. The results of the dissertation were published in 9 scientific publica-tions, 2 of which were in reviewed scientific journals indexed in Clarivate Analytics Science Citation Index

COBOL systems migration to SOA: Assessing antipatterns and complexity

SOA and Web Services allow users to easily expose business functions to build larger distributed systems. However, legacy systems - mostly in COBOL - are left aside unless applying a migration approach. The main approaches are direct and indirect migration. The former implies wrapping COBOL programs with a thin layer of a Web Service oriented language/platform. The latter needs reengineering COBOL functions to a modern language/ platform. In our previous work, we presented an intermediate approach based on direct migration where developed Web Services are later refactored to improve the quality of their interfaces. Refactorings mainly capture good practices inherent to indirect migration. For this, antipatterns for WSDL documents (common bad practices) are detected to prevent issues related to WSDLs understanding and discoverability. In this paper, we assess antipatterns of Web Services’ WSDL documents generated upon the three migration approaches. In addition, generated Web Services’ interfaces are measured in complexity to attend both comprehension and interoperability. We apply a metric suite (by Baski & Misra) to measure complexity on services interfaces - i.e., WSDL documents. Migrations of two real COBOL systems upon the three approaches were assessed on antipatterns evidences and the complexity level of the generated SOA frontiers - a total of 431 WSDL documents.Fil: Mateos Diaz, Cristian Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto Superior de Ingeniería del Software. Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto Superior de Ingeniería del Software; ArgentinaFil: Zunino Suarez, Alejandro Octavio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto Superior de Ingeniería del Software. Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto Superior de Ingeniería del Software; ArgentinaFil: Flores, Andrés Pablo. Universidad Nacional del Comahue. Facultad de Informática. Departamento Ingeniería de Sistemas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Misra, Sanjay. Atilim University; Turquía. Covenant University; Nigeri

an important partnership for decades

Graesch, J. P., Hensel-Börner, S., & Henseler, J. (2021). Information technology and marketing: an important partnership for decades. Industrial Management and Data Systems, 121(1), 123-157. https://doi.org/10.1108/IMDS-08-2020-0510Purpose: The enabling technologies that emerged from information technology (IT) have had a considerable influence upon the development of marketing tools, and marketing has become digitalized by adopting these technologies over time. The purpose of this paper is to demonstrate the impacts of these enabling technologies on marketing tools in the past and present and to demonstrate their potential future. Furthermore, it provides guidance about the digital transformation occurring in marketing and the need to align of marketing and IT. Design/methodology/approach: This study demonstrates the impact of enabling technologies on the subsequent marketing tools developed through a content analysis of information systems and marketing conference proceedings. It offers a fresh look at marketing's digital transformation over the last 40 years. Moreover, it initially applies the findings to a general digital transformation model from another field to verify its presence in marketing. Findings: This paper identifies four eras within the digital marketing evolution and reveals insights into a potential fifth era. This chronological structure verifies the impact of IT on marketing tools and accordingly the digital transformation within marketing. IT has made digital marketing tools possible in all four digital transformation levers: automation, customer interaction, connectivity and data. Practical implications: The sequencing of enabling technologies and subsequent marketing tools demonstrates the need to align marketing and IT to design new marketing tools that can be applied to customer interactions and be used to foster marketing control. Originality/value: This study is the first to apply the digital transformation levers, namely, automation, customer interaction, connectivity and data, to the marketing discipline and contribute new insights by demonstrating the chronological development of digital transformation in marketing.authorsversionpublishe

Lo strumento di Wikipedia come risorsa per la comunità scientifica del dipartimento di fisica di Bologna

Questa ricerca mira a fornire una panoramica approfondita sul ruolo di Wikipedia come risorsa per la comunità scientifica del Dipartimento di Fisica di Bologna, contribuendo a una comprensione più completa dei modelli di utilizzo, delle percezioni e dell’efficacia di Wikipedia all’interno di un contesto accademico specifico. Ho sottoposto 170 persone tra cui studenti triennali, magistrali, dottorandi, docenti e ricercatori a un questionario di circa 20 domande divise in tre categorie principali: 1. Caratteri principali di Wikipedia. 2. Valutazioni personali su Wikipedia come mezzo di informazione 3. Domande di ruolo I dati raccolti dal nostro sondaggio e dalle ricerche citate ci hanno dimostrato che Wikipedia si presenta come un ottimo strumento di divulgazione, chiaro, affidabile e tendenzialmente completo. La natura collettiva della piattaforma si è rivelata essere la caratteristica più importante dell’enciclopedia, poiché garantisce un processo di revisione continuo. L’ambiente accademico si pone con un atteggiamento generale di sfiducia nei confronti del sito. Notiamo però che questa tendenza non è appoggiata dai dati, che ci hanno dimostrato che gli errori contenuti in Wikipedia sono comparabili a quelli presenti all’interno di altri testi d’informazione peer reviewed, e che quindi tale sensazione di diffidenza non è giustificata. Wikipedia sul suo sito non si dichiara mai come uno strumento di informazione primaria, bensì come un’enciclopedia neutra e universale, risorsa terziaria che raccoglie le informazioni più importanti riguardo qualsivoglia argomento in un unico dominio. Il fatto che un intervistato su tre utilizzi Wikipedia per approfondire argomenti di ricerca complessi, dimostra che il sito web ad oggi supera persino le proprie aspettative, trasformando la piattaforma nell’hub di informazioni più importante del mondo

Korreferentzia-ebazpena euskarazko testuetan.

203 p.Gaur egun, korreferentzia-ebazpen automatikoa gakotzat har dezakegu testuak ulertuahal izateko; ondorioz, behar-beharrezkoa da diskurtsoaren ulerkuntza sakona eskatzenduten Lengoaia Naturalaren Prozesamenduko (NLP) hainbat atazatan.Testu bateko bi espresio testualek objektu berbera adierazi edo erreferentziatzendutenean, bi espresio horien artean korreferentzia-erlazio bat dagoela esan ohi da. Testubatean ager daitezkeen espresio testual horien arteko korreferentzia-erlazioak ebazteahelburu duen atazari korreferentzia-ebazpena deritzo.Tesi-lan hau, hizkuntzalaritza konputazionalaren arloan kokatzen da eta euskarazidatzitako testuen korreferentzia-ebazpen automatikoa du helburu, zehazkiago esanda,euskarazko korreferentzia-ebazpen automatikoa gauzatzeko dagoen baliabide eta tresnenhutsunea betetzea du helburu.Tesi-lan honetan, lehenik euskarazko testuetan ager daitezkeen espresio testualakautomatikoki identifikatzeko garatu dugun erregelatan oinarritutako tresna azaltzen da.Ondoren, Stanfordeko unibertsitatean ingeleserako diseinatu den erregelatanoinarritutako korreferentzia-ebazpenerako sistema euskararen ezaugarrietara nolaegokitu den eta ezagutza-base semantikoak erabiliz nola hobetu dugun aurkezten da.Bukatzeko, ikasketa automatikoan oinarritzen den BART korreferentzia-ebazpenerakosistema euskarara egokitzeko eta hobetzeko egindako lana azaltzen da

Optimising route comfort indices for neonatal transfers by road

The risk of severe brain injuries in sick premature infants increases when transferred between hospitals. Causality is uncertain, but stress levels are elevated during ambulance journeys; potentially due to excessive levels of noise and vibration. It has been proposed that reducing these levels would reduce the risk, with one prospective method being comfort-optimised navigation. An Android app was developed that logs noise level, Inertial Measurement Unit (IMU) and location data during journeys, sampling at the fastest rates possible depending on the hardware and firmware. The smartphone used during development was found to sample noise levels accurate to 0.3 dB up to 80 dB(A) and accelerations accurate to 10\% up to 40~Hz, although considerable jitter was present in the IMU sampling. Recorded data were shown to be repeatable for multiple passes over the same stretch of road (acceleration interquartile range (IQR): 0.14ms^{-2}; noise IQR: 2.8 dB). Data were influenced by both supplementary audio and the smartphone model so an initial idea of gathering data through public engagement was determined unsuitable. Controlled collection of data was planned, utilising the neonatal ambulances operated by CenTre Neonatal Transport (CenTre). A new smartphone model was identified that was capable of sampling accelerations at a sufficient rate to comply with the "Evaluation of human exposure to whole-body vibration" standard, ISO 2631. This model also had greater processing power than the previous model used during initial testing, resulting in reduced jitter, and was found to provide more accurate accelerations (within 5% up to 55 Hz). Logging of periods before and after each journey was added along with meta-data describing each journey. Journeys performed by CenTre were recorded over the course of 12 months. Recorded variables were supplemented by calculation of ISO-weighted vibration parameters. The final dataset comprises 1,487 journeys over 81,901 km and 1,318 hours. Strong similarities between meta-data and officially reported transport data suggested there was no bias in the journeys that the staff recorded. Roads driven between Nottingham City Hospital (NCH) and Leicester Royal Infirmary (LRI) were chosen as a case study. Data from 588 journeys contributed towards the analysis. A range of metrics, derived from previous studies and adult standards, were used to assess the roads of the NCH to LRI network. Both speed and road classification were found to influence vibration and noise level, however the influence could not be separated due to the inherent link between both parameters. All routes involved either use of motorway or a concrete A-road, with the latter producing worse vibration. Although individual road sections varied, differences were reduced between the routes. Assessments were also performed of the metrics at each of the 42 hospitals (36 departing; 38 arriving) present in the data. Results were similar between hospitals, but differed between loading and unloading phases. High magnitude shocks were more abundant during the loading phases, whereas low impact vibrations were more frequent during unloading. Both phases registered greater shocks than those found during journeys. In summary, this work provides a low-cost method of obtaining large amounts of data describing the ambulance environment without requiring any technical knowledge to operate. The theory that the physical environment could be altered through routing has also been confirmed. The data collected during this work could be utilised in the future to aid determination of neonatal responses and subsequently establish optimal routes