3 research outputs found
Detecting error related negativity using EEG potentials generated during simulated brain computer interaction
2014 Summer.Includes bibliographical references.Error related negativity (ERN) is one of the components of the Event-Related Potential (ERP) observed during stimulus based tasks. In order to improve the performance of a brain computing interface (BCI) system, it is important to capture the ERN, classify the trials as correct or incorrect and feed this information back to the system. The objective of this study was to investigate techniques to detect presence of ERN in trials. In this thesis, features based on averaged ERP recordings were used to classify incorrect from correct actions. One feature selection technique coupled with four classification methods were used and compared in this work. Data were obtained from healthy subjects who performed an interaction experiment and the presence of ERN indicating incorrect responses was studied. Using suitable classifiers trained on data recorded earlier, the average recognition rate of correct and erroneous trials was reported and analyzed. The significance of selecting a subset of features to reduce the data dimensionality and to improve the classification performance was explored and discussed. We obtained success rates as high as 72% using a highly compact feature subset
Mobiilipelit ja pelimoottorit
Työssä esitellään lukijalle tietokonepelit ja mobiilipelimoottorit, jonka jälkeen edetään arvioimaan markkinoilta löytyviä pelimoottoreita pienen mobiilipelejä tuottavan peliyrityksen näkökulmasta. Arvioinnin tarkoituksena on löytää yritykselle parhaiten sopiva pelimoottori. Arvioinnissa hyödynnetään ISO/IEC 25000 sarjan ohjelmistojen laatustandardeja. Kahdestakymmenestä mobiilipelien tuottamiseen soveltuvasta pelimoottorista muodostetaan objektiivinen arvio, jonka perusteella yritykselle parhaalta vaikuttavaa pelimoottoria arvioidaan syvemmin prototyyppipeliprojektissa. Työn perusteella löydetään yritykselle hyvin soveltuva pelimoottori
Development of context-sensitive user interfaces
Dobro dizajniran, intuitivan i privlačan za korišćenje korisnički interfejs predstavlja ključni
faktor uspeha računarskih proizvoda i sistema. Radi unapređenja razvoja i upotrebljivosti
korisničkih interfejsa potrebno je uzeti u obzir karakteristike korisnika. Ovo zahteva
interdisciplinaran pristup i korišćenje znanja iz različitih oblasti kao što su računarske, saznajne
i biološke nauke. Pored toga, potrebno je uzeti u obzir karakteristike medija i fizičkog okruženja
u kojem se odvija interakcija čoveka i računara. Razvoj korisničkog interfejsa treba da uvaži i
karakteristike hardverskih uređaja koji se koriste u komunikaciji sa korisnikom, dostupne
softverske resurse, kao i karakteristike programskih sistema koji treba da koriste korisnički
interfejs. U skladu sa tim, uvodi se pojam kontekstno-osetljivog interfejsa koji se definiše kao
korisnički interfejs koji je prilagodljiv kontekstu interakcije sa konkretnim korisnikom. Kontekst
interakcije čine tri klase entiteta: korisnik računarskog sistema (čovek); hardverska i softverska
platforma pomoću kojih korisnici interaguju sa sistemom i fizičko okruženje u kojem se
odigrava interakcija sa sistemom.
Posmatrajući evoluciju razvoja softvera uočavamo povećanje nivoa apstrakcije na kojem se
softver opisuje. Dostignuti nivo razvoja omogućava platformski nezavisnu specifikaciju softvera
koja se postepeno ili automatizovano prevodi u izvršne aplikacije za različite softverske i
hardverske platforme. Arhitektura upravljana modelima, koja se koristi za razvoj složenih
programskih rešenja, hijerarhijski organizuje koncepte i modele u više nivoa apstrakcije. Ovo je
posebno bitno imajući u vidu da je razvoj kontekstno-osetljivih korisničkih interfejsa složen
proces koji uključuje modelovanje velikog broja elemenata na različitim nivoima apstrakcije.
U ovoj tezi smo istraživali problem unapređenja razvoja kontekstno-osetljivih korisničkih
interfejsa. Predloženo je rešenje koje omogućava automatizaciju razvoja korisničkog interfejsa
prilagođenog kontekstu interakcije čoveka i računara. Rešenje se ogleda u proširenju jezika za
modelovanje, standardnog procesa razvoja softverskih sistema (Unified proces) i razvojnih alata
elementima specifičnim za interakciju čoveka i računara. U skladu sa prethodnim, razvijen je
model kontekstno-osetljive interakcije čoveka i računara i predloženi su modeli korisničkih
interfejsa na različitim nivoima apstrakcije. Zbog standardizacije, široke prihvaćenosti, i
dostupnosti razvojnih alata, odlučili smo se za proširenje UML (Unified Modeling Language)
jezika za modelovanje i ATL (Atlas Transformation Language) jezika za transformacije modela.
Primena predloženog pristupa je demonstrirana na primerima dve studije slučaja iz različitih
domena...Well-designed, intuitive and catchy-to-use user interface represents key issue of success of
computer products and systems. In order to improve development and usability of user
interfaces it is needed to take into account user’s charasteristics. This entails interdisciplinary
approach and use of knowledge from different fields such as computing, cognitive and biological
sciences. In addition, it is needed to consider features of the physical environment and the
medium in which interaction between human and computer takes place. Development of user
interface must include characteristics of hardware devices employed in interaction with the
user, availabale software resources, as well as characteristics of software systems using the
interface. According to stated, concept of context-sensitive user interface is introduced, defined
as a user interface adaptable to context of interaction with concrete user. Context of interaction
is decomposed into three classes of entitites: user of a computer system (human); hardware and
software platforms by which users interact with the system and physical environment in which
interaction with system happens.
Looking at the evolution of software development, we can notice that the abstraction level on
which software is described is increasing all the time. The latest trend is to specify software
using platform-independent models, which are then gradually and (semi-) automatically
transformed into executable applications for different platforms and target devices. Modeldriven
architecture, used for development of complex software solutions, hierarchically
organizes concepts and models into multiple abstraction levels. This is especially important
regarding development of context-sensitive user interfaces which appears to be a complex
process involved with modeling of a large number of elements on different abstraction levels.
In this thesis, we have been exploring problem concerned with the improvement of development
of context-sensitive user interfaces. Solution enabling automation of development of user
interface adaptable to context of interaction between human and computer is proposed.
Solution includes extensions of modelling language, standard software development process
(Unified process) and development tools with the elements specific for human-computer
interaction. Based on previous, model of context-sensitive human-computer interaction has
been developed and user interface models on different abstraction levels have been proposed.
For reasons of standardization, wide acceptance and availability of development tools, we have
decided to extend UML (Unified Modeling Language) modeling language and ATL (Atlas
Transformation Language) language for model transformations. Application of the proposed
approach is demonstrated with examples of two case studies from different domains..