Search results for "tietokoneet"

Amigaskene, alakulttuuri tietokoneen puitteissa : kuvauksia alakulttuurin ja teknologioiden yhteenkietoutumisesta

2008

Tutkielman aiheena on tietokoneharrastajien alakulttuuri, jota kutsutaan Amigaskeneksi. Tutkielmassa tarkastellaan ensinnäkin niitä kulttuurin ja tietotekniikan puitteita, joiden viitekehyksessä tietokone harrastajat toimivat. Alakulttuurina Amigaskene sijoittuu yhtäältä sitä ympäröivien kulttuurien, kuten vallitsevan yhteiskunnan ja Amigaskeneä edeltävän skene-alakulttuurin, kehiin ja toisaalta Amigan mahdollistamaan tietotekniseen viitekehykseen. Lisäksi tutkielmassa tarkastellaan teknologiavälitteisen alakulttuurin puitteisiin rakentuneita kulttuurisia aineksia, joiden johdosta alakulttuuri erottuu kulttuuriksi. Tutkielmassa käytetään alakulttuurin määritelmää ja toimijaverkostoteoriaa a…

Energy-efficient quantum computing

2016

In the near future, a major challenge in quantum computing is to scale up robust qubit prototypes to practical problem sizes and to implement comprehensive error correction for computational precision. Due to inevitable quantum uncertainties in resonant control pulses, increasing the precision of quantum gates comes with the expense of increased energy consumption. Consequently, the power dissipated in the vicinity of the processor in a well-working large-scale quantum computer seems unacceptably large in typical systems requiring low operation temperatures. Here, we introduce a method for qubit driving and show that it serves to decrease the single-qubit gate error without increasing the a…

Using tablets as tools for learner-generated drawings in the context of teaching the kinetic theory of gases

2014

Even though research suggests that the use of drawings could be an important part of learning science, learnergenerated drawings have not received much attention in physics classrooms. This article presents a method for recording students’ drawings and group discussions using tablets. Compared to pen and paper, tablets offer unique benefits, which include the recording of the whole drawing process and of the discussion associated with the drawing. A study, which investigated the use of drawings and the need for guidance among Finnish upper secondary school students, is presented alongside ideas for teachers on how to see drawing in a new light. peerReviewed

Efficient protocol for qubit initialization with a tunable environment

2017

We propose an efficient qubit initialization protocol based on a dissipative environment that can be dynamically adjusted. Here the qubit is coupled to a thermal bath through a tunable harmonic oscillator. On-demand initialization is achieved by sweeping the oscillator rapidly into resonance with the qubit. This resonant coupling with the engineered environment induces fast relaxation to the ground state of the system, and a consecutive rapid sweep back to off resonance guarantees weak excess dissipation during quantum computations. We solve the corresponding quantum dynamics using a Markovian master equation for the reduced density operator of the qubit-bath system. This allows us to optim…

HTML5 tablet uutissovelluksen suunnittelu ja toteutus

2013

Keskipohjanmaa-lehdestä haluttiin toteuttaa web-pohjainen, HTML5:tä hyödyntävä tablet-uutissovellus Keski-Pohjanmaan Kirjapaino Oyj:lle. Työssä tut- kittiin uusimpia web-teknologioita, kannettavia laitteita, web-sovelluksen tekemis- tä ja tablet-sovelluksen luomista sanomalehdestä. Työn aikana toteutettiin kolme prototyyppiä ja kaksi virallista tablet-sovellusversiota. Ensimmäisessä virallisessa versiossa rakenne ja data olivat yhdessä sekä osa sovelluslogiikasta oli palvelimen koodissa. Toisessa versiossa data ja rakenne olivat erillään ja sovelluslogiikka oli tehty Javascriptillä. Tehdessä web-sovellusta tablet-laitteille selvisi, että on huomioi- tava suorituskyky ja Internet-selainten e…

Mitigating technostress is not easy, but it’s doable

2021

Although personal use of digital technologies is often characterised as fun and voluntary, technostress is anything but. Floods of push notifications and information from personal devices and the constant pressure to be available online can contribute to poor well-being, fatigue, and concentration problems. Markus Salo, Henri Pirkkalainen, Cecil Chua and Tiina Koskelainen explain how technostress develops over time and how users can mitigate it. nonPeerReviewed

The relationship between ICT use and reading literacy : focus on 15-year-old Finnish students in PISA studies

2014

Kansalaiset viestintäteknologian ja aikuiskoulutuksen käyttäjinä Keski-Pohjanmaalla

2002

Learner-generated drawings in physics education

2013

Different kinds of visual representations, such as graphs and drawings are important in education but especially in science education. Little attention is paid especially to drawings. Students are required to examine drawings and assimilate the information conveyed by them but not much attention is paid to the students’ own drawings. Arguments can be made for the importance of learner-generated drawings in science education. The subject of this thesis is the use of learner-generated drawings in physics education. A study was conducted to study the use of learner-generated drawings as a tool for meaning-making. The study involved 36 upper secondary school students who were given a drawing as…

Novel high-performance QCA Fredkin gate and designing scalable QCA binary to gray and vice versa

2022

AbstractIn the design of digital logic circuits, QCA technology is an excellent alternative to CMOS technology. Its advantages over CMOS include low power consumption, fast circuit switching, and nanoscale design. Circuits that convert data between different formats are code converters. Code converters have an essential role in high-performance computing and signal processing. In this paper, first, we proposed a novel QCA structure for the quantum reversible Fredkin gate. Second, we proposed 4-bit and 8-bit QCA binary-to-gray converter and vice versa. For the second proposal, both reversible and irreversible structures are suggested. The proposed structures are scalable up to N bits. To cha…