Search results for "DEP"

Can back-projection fully resolve polarity indeterminacy of independent component analysis in study of event-related potential?

2011

a b s t r a c t In the study of event-related potentials (ERPs) using independent component analysis (ICA), it is a traditional way to project the extracted ERP component back to electrodes for correcting its scaling (magnitude and polarity) indeterminacy. However, ICA tends to be locally optimized in practice, and then, the back-projection of a component estimated by the ICA can possibly not fully correct its polarity at every electrode. We demonstrate this phenomenon from the view of the theoretical analysis and numerical simulations and suggest checking and modifying the abnormal polarity of the projected component in the electrode field before further analysis. Moreover, when several co…

Determining the number of sources in high-density EEG recordings of event-related potentials by model order selection

2011

To high-density electroencephalography (EEG) recordings, determining the number of sources to separate the signal and the noise subspace is very important. A mostly used criterion is that percentage of variance of raw data explained by the selected principal components composing the signal space should be over 90%. Recently, a model order selection method named as GAP has been proposed. We investigated the two methods by performing independent component analysis (ICA) on the estimated signal subspace, assuming the number of selected principal components composing the signal subspace is equal to the number of sources of brain activities. Through examining wavelet-filtered EEG recordings (128…

Using VIS/NIR and IR spectral cameras for detecting and separating crime scene details

2012

Detecting invisible details and separating mixed evidence is critical for forensic inspection. If this can be done reliably and fast at the crime scene, irrelevant objects do not require further examination at the laboratory. This will speed up the inspection process and release resources for other critical tasks. This article reports on tests which have been carried out at the University of Jyväskylä in Finland together with the Central Finland Police Department and the National Bureau of Investigation for detecting and separating forensic details with hyperspectral technology. In the tests evidence was sought after at an assumed violent burglary scene with the use of VTT's 500-900 nm wave…

Scalable implementation of dependence clustering in Apache Spark

2017

This article proposes a scalable version of the Dependence Clustering algorithm which belongs to the class of spectral clustering methods. The method is implemented in Apache Spark using GraphX API primitives. Moreover, a fast approximate diffusion procedure that enables algorithms of spectral clustering type in Spark environment is introduced. In addition, the proposed algorithm is benchmarked against Spectral clustering. Results of applying the method to real-life data allow concluding that the implementation scales well, yet demonstrating good performance for densely connected graphs. peerReviewed

TDDFT Analysis of Optical Properties of Thiol Monolayer-Protected Gold and Intermetallic Silver–Gold Au144(SR)60 and Au84Ag60(SR)60 Clusters

2014

The optical absorption spectra of atomistic model structures for experimentally isolated all-gold Au144(SR)60 and intermetallic Au84Ag60(SR)60 clusters are systematically analyzed from linear-response time-dependent density functional theory (LR-TDDFT) and time-dependent density functional perturbation theory (TD-DFPT) calculations. The computed spectra, utilizing the atomistic model for Au144(SR)60 published by us in 2009, reproduce closely the experimental observations for corresponding isolated compounds, reported previously by Kumara and Dass in 2011. A collective dipole oscillation within the metal cores of the all-gold and intermetallic clusters is formed as response to light in the v…

Optical Properties of Monolayer-Protected Aluminum Clusters: Time-Dependent Density Functional Theory Study

2015

We examine the electronic and optical properties of experimentally known monolayer-protected aluminum clusters Al4(C5H5)4, Al50(C5Me5)12, and Al69(N(SiMe3)2)183– using time-dependent density functional theory. By comparing Al4(C5H5)4 and the theoretical Al4(N(SiMe3)2)4 cluster, we observe significant changes in the optical absorption spectra caused by different hybridization between metal core and ligands. Using these initial observations, we explain the calculated spectra of Al50(C5Me5)12 and Al69(N(SiMe3)2)183–. Al50(C5Me5)12 shows a structured spectrum with clear regions of low-intensity core-to-core transitions followed by high-intensity ligand-to-core transitions due to its high symmet…

Three Halves of a Whole : Redefining East and West in UNESCO’s East-West Major Project 1957-1966

2017


 
 
 In 1946 Julian Huxley, UNESCO’s rst Director-General, suggested that two opposing philosophies of life were confronting each other from the East and the West, setting the focus on the cultural aspect of this polarisation and de ning the possibility of an East- West conflict as the main threat to world peace. A decade later, in 1957, UNESCO launched The Major Project on the Mutual Appreciation of Eastern and Western Cultural Values to promote its ideas of intercultural understanding as a means to maintaining peace. The core concepts of the Project, East and West, were not strictly defined. Here East and West, as concepts, fit Reinhart Koselleck’s definition of Grundbegri…

Our art the reasoning for the acquisition and placing of the public sculptures of the Jyväskylä City Art Collection in 1977-2007

2009

Seitsemän elokuvaa kuulumisesta : lyhytelokuva menetelmänä ja tutkimuksen kohteena osallistavassa hankkeessa

2019

Artikkelissa pohditaan lyhytelokuvan roolia taideperustaisessa osallistavassa tutkimushankkeessa Rajojen yli – kuulumisen performansseja ja narratiiveja taiteen keinoin (2017–2021). Tutkijalähtöisessä hankkeessa ihmisiä kutsuttiin pohtimaan kuulumista työpajoissa taiteen tekemisen ja keskustelun kautta. Yksi työpajoista oli videotyöpaja, jossa osallistujien tavoitteena oli tehdä kuulumista käsittelevä lyhytelokuva. Työpajassa valmistui seitsemän elokuvaa, jotka esitettiin julkisessa ensi-illassa ja taidenäyttelyssä, joka koostettiin kaikissa työpajoissa valmistuneista teoksista. Itsereflektiivisen artikkelin lähtökohtana on kysymys siitä, miten tutkijoiden ”tilauksesta” tehtyjä lyhytelokuvi…

Kulttuuripolitiikan visiot ja jatkuvuus : katsaus Suomen puolueiden kevään 2019 eduskuntavaaliohjelmiin ja tuoreimpiin kulttuuripoliittisiin erityiso…

2019

Political parties are significant cultural political influencers: they are in key positions to define cultural policy and how it is implemented in society. Parties have attitudes and interests toward culture that they inform about through their different programme documents such as broad general programmes, more narrow art and cultural policy and other policy sector specific programmes, and election programmes that delineate parties’ goals for the following electoral period. In this review, we concentrate on the latter ones. Through the parties’ parliamentary election programmes of 2019 and their most recent cultural policy special programmes we examine the parties’ cultural political disco…