Search results for "working"
showing 10 items of 2747 documents
Restoration and Enhancement of Historical Stereo Photos
2021
Restoration of digital visual media acquired from repositories of historical photographic and cinematographic material is of key importance for the preservation, study and transmission of the legacy of past cultures to the coming generations. In this paper, a fully automatic approach to the digital restoration of historical stereo photographs is proposed, referred to as Stacked Median Restoration plus (SMR+). The approach exploits the content redundancy in stereo pairs for detecting and fixing scratches, dust, dirt spots and many other defects in the original images, as well as improving contrast and illumination. This is done by estimating the optical flow between the images, and using it …
Humanoid Cognitive Robots That Learn by Imitating: Implications for Consciousness Studies.
2018
While the concept of a conscious machine is intriguing, producing such a machine remains controversial and challenging. Here we describe how our work on creating a humanoid cognitive robot that learns to perform tasks via imitation learning relates to this issue. Our discussion is divided into three parts. First, we summarize our previously-detailed framework for advancing the understanding of the nature of phenomenal consciousness. This framework is based on identifying computational correlates of consciousness. Second, we describe a cognitive robotic system that we recently developed that learns to perform tasks by imitating human-provided demonstrations. This humanoid robot uses cause-ef…
Moving RTS/CTS to the frequency domain: an efficient contention scheme for 802.11ax networks
2019
In this paper, we propose a contention mechanism based on the execution of multiple contention rounds in the frequency domain (ReCHo), which is designed to offer high throughput performance and robustness with respect to imperfect carrier sensing. The main idea is using narrow tones as signalling messages for performing channel access contentions and allowing the Access Point (AP) to echo these signals, in order to extend the sensing capabilities to all the stations associated to the AP. In particular, we refer to the emerging IEEE 802.11ax standard, showing how our scheme can boost performance of random access with respect to the current version of IEEE 802.11ax OFDMA Back-Off (OBO), even …
'Good to Repeat': Making Random Access Near-Optimal with Repeated Contentions
2020
Recent advances on WLAN technology have been focused mostly on boosting network capacity by means of a more efficient and flexible physical layer. A new concept is required at MAC level to exploit fully the new capabilities of the PHY layer. In this article, we propose a contention mechanism based on Repeated Contentions (ReCo) in frequency domain. It provides a simple-to-configure, robust and short-term fair algorithm for the random contention component of the MAC protocol. The throughput efficiency of ReCo is not sensitive to the number of contending stations, so that ReCo does not require adaptive tuning of the access parameters for performance optimization. Efficiency and robustness is …
Formaciones sociales y opresión en Marx
2018
The text explains the difference between Marx?s concept of «oppression» and others as «coercion» by Durkheim or «domination» by Weber. The article then establishes, in a methodical way, the centrality of a passage from Capital, in which three different theories on «oppression» appear. It?s explained that two of them are rather a philosophical antinomy. The other, relative to the heteronomy of social time, can be completed by defining the heteronomy of social space, which gives it analytical virtuality. Some examples are given.
Profiles of work intensification among Finnish managers: relationships with well-being and turnover intentions
2020
Tutkimuksessa selvitettiin, millaisia työn intensifikaation eli työn kiihtymisen profiileja voidaan tunnistaa johtajilla ja miten eri profiilien johtajat eroavat toisistaan työhyvinvoinnin ja työnkuvan vaihtoajatusten suhteen. Kyselytutkimuksen otos poimittiin Professoriliiton, Tieteentekijöiden liiton, Suomen Ekonomien ja Tekniikan Akateemisten jäsenrekistereistä. Tutkituista johtajista (N=705) yli puolet (56 %) oli miehiä. Löysimme K-keskiarvojen klusterianalyysin avulla viisi profiilia: 1) Riskiprofiili (voimakas työn intensifikaatio, 31 %), 2) suotuisa profiili (työn- ja urasuunnittelun vaatimukset lisääntyneet kohtuullisesti, 19 %), 3) haitta- ja haastestressoriprofiili (työtahti ja ti…
Lessons learned on student engagement from the nature of pervasive socio‐digital interests and related network participation of adolescents
2021
The rise of modern socio-digital technologies has fundamentally changed the everyday environments in which young people communicate with each other and cultivate interests. To gain a more sophisticated understanding of this phenomenon, this study provides in-depth, qualitative insights into adolescents’ experiences of their socio-digital developmental ecologies. The 15 interview participants were recruited based on a previously conducted questionnaire. The semi-structured theme interview addressed the socio-digital aspects of the participants’ interest-driven behaviours and related networks with the aid of participant-generated egocentric maps. The data not only qualitatively enrich the pic…
An Efficient Implementation of Parallel Parametric HRTF Models for Binaural Sound Synthesis in Mobile Multimedia
2020
The extended use of mobile multimedia devices in applications like gaming, 3D video and audio reproduction, immersive teleconferencing, or virtual and augmented reality, is demanding efficient algorithms and methodologies. All these applications require real-time spatial audio engines with the capability of dealing with intensive signal processing operations while facing a number of constraints related to computational cost, latency and energy consumption. Most mobile multimedia devices include a Graphics Processing Unit (GPU) that is primarily used to accelerate video processing tasks, providing high computational capabilities due to its inherent parallel architecture. This paper describes…
Platonism, intuition and the nature of mathematics
1988
Platonism is an essential aspect of mathematical method. Mathematicians are learned ability " t o l i v e " in the "world" of mathematical concepts. Here we have the main source of the creative power of mathematics, and of its surprising efficiency in natural sciences and technique. In this way, "living" (sometimes - for many years) in the "world"of their concepts and models, mathematicians are learned to draw a maximum of conclusions from a minimum of premises. Fixed system of basic principles is the distinguishing property of every mathematical theory. Mathematical model of some natural process or technical device is essentially a f i x e d m o d e l which can be investigated indepen…
Mitä opin? Monilukutaitoa ja tutkivaa oppimista monialaisessa oppimiskokonaisuudessa
2019
Tarkastelemme tässä artikkelissa, mitä oppilaat, opettajat ja opettajaopiskelijat raportoivat oppineensa yhdessä toteuttamassaan monialaisessa oppimiskokonaisuudessa, johon osallistuivat erään yhtenäiskoulun kaikki 5.–8. luokan oppilaat. Oppimiskokonaisuuden aihe oli terve elämä ja sitä opiskeltiin viikon ajan ikäsekoitteisissa ryhmissä tutkivan oppimisen keinoin ja monilukutaitoa harjaannuttaen. Tutkimusaineisto koostuu 250 oppilaan, 25 opettajan ja 23 opettajaopiskelijan laadullisista itsearvioinneista, ja se analysoitiin laadullisen aineistolähtöisen teoriaohjaavan sisällönanalyysin keinoin. Tulosten mukaan oppilaat kertoivat oppineensa vuorovaikutustaitoja ja monimuotoisten tekstien tuo…