Preface

Info- ja kommunikatsioonitehnoloogia omandab järjest suuremat rolli peaaegu kõikides inimtegevuse valdkondades, pakkudes võimalusi sotsiaalseks suhtluseks, info otsimiseks ja haldamiseks, meelelahutuseks, e-teenuste osutamiseks ja kasutamiseks, kuid arvesse tuleb võtta ka internetikasutuse pahupoolt. Nimelt kuulub Eesti nende riikide hulka, mis paistab silma kõrge internetiriskide taseme poolest. Seetõttu käsitletakse seekordse ajakirjanumbri artiklites nii võimalusi kui ka ohte, mis kaasnevad digivahendite kasutamisega haridusvaldkonnas. Artiklid tuginevad laiapõhjalistele uuringutele ning võiksid pakkuda huvi koolieelsete lasteasutuste ja üldhariduskoolide õpetajatele, aga ka kõrgkoolide õppejõududele. Metodoloogilise poole pealt annavad artiklid hea ülevaate eri võimalustest, kuidas digimaailma uurida

Overview of biogas technology

Baltic Manure WP6 energy potentialsvo

Covers of acts over monoids II

In 1981 Edgar Enochs conjectured that every module has a flat cover and finally proved this in 2001. Since then a great deal of effort has been spent on studying different types of covers, for example injective and torsion free covers. In 2008, Mahmoudi and Renshaw initiated the study of flat covers of acts over monoids but their definition of cover was slightly different from that of Enochs. Recently, Bailey and Renshaw produced some preliminary results on the `other' type of cover and it is this work that is extended in this paper. We consider free, divisible, torsion free and injective covers and demonstrate that in some cases the results are quite different from the module case

HCI and UN's sustainable development goals:responsibilities, barriers and opportunities

Despite increasing interest, Sustainable HCI has been critiqued for doing too little, and perhaps also at times for doing the wrong things. Still, a field like Human-Computer Interaction should aim at being part of transforming our society into a more sustainable one. But how do we do that, and, what are we aiming for? With this workshop, we propose that HCI should start working with the new global Sustainable Development Goals (SDG) that were formally adopted by the UN in September 2015. How can Sustainable HCI be inspired by, and contribute to these goals? What should we in the field of HCI do more of, and what should we perhaps do less of? In what areas should we form partnerships in order to reach the Sustainable Development Goals and with whom should we partner

Biochemical methane potential of different organic wastes and energy crops from Estonia

The biochemical methane potential (BMP) of different Estonian substrates as alternative sources for biogas production was studied. For this purpose, the BMP test was carried out in batch mode at mesophilic temperature (36°C). Substrates were divided into 2 groups: agricultural substrates (silage, hay, cattle and pig slurry) and food industry residues (milk, brewery and cereal industry residues). Methane yields obtained were between 286–319 L kgVS-1 for silage and hay, 238–317 L kgVS-1 for animal slurry and 272–714 L kgVS-1 for agro-industrial wastes. The highest methane yield was obtained from sour cream (714 L kgVS-1), the lowest (238 L kgVS-1) from cattle slurry. In overall, our results suggest that all tested substrates can be treated anaerobically and are potential sources for the production of methane

Ubiquitous learning architecture to enable learning path design across the cumulative learning continuum

The past twelve years have seen ubiquitous learning (u-learning) emerging as a new learning paradigm based on ubiquitous technology. By integrating a high level of mobility into the learning environment, u-learning enables learning not only through formal but also through informal and social learning modalities. This makes it suitable for lifelong learners that want to explore, identify and seize such learning opportunities, and to fully build upon these experiences. This paper presents a theoretical framework for designing personalized learning paths for lifelong learners, which supports contemporary pedagogical approaches that can promote the idea of a cumulative learning continuum from pedagogy through andragogy to heutagogy where lifelong learners progress in maturity and autonomy. The framework design builds on existing conceptual and process models for pedagogy-driven design of learning ecosystems. Based on this framework, we propose a system architecture that aims to provide personalized learning pathways using selected pedagogical strategies, and to integrate formal, informal and social training offerings using two well-known learning and development reference models; the 70:20:10 framework and the 3–33 model

GDNF mimeetikute GFR 1-RET aktiveerimise eksperimentaalne uurimine ja QSAR modelleerimine

Käesolevas töös vaadeldakse ülevaatlikult GDNFi perekonna ligandide toimemehhanisme, nende aktiveeritud signaaliradu ja mõju organismi toimimisele. Gliia rakuliinidest saadud neurotroofiline faktor (GDNF) on väike proteiin, mis kannab oma signaali läbi GFR retseptorite.[ 1] Raskete neuroloogiliste haiguste nagu Parkinsoni tõve või ALS efektiivseks ja püsivaks raviks on vajalik neuronite taaselustamine. GDNF aitab päästa dopaminergilisi närvirakke, mis manduvad Parkinsoni tõvega, ning seljamotoneuroneid, mida mõjutab ALS. [2, 3] Töö eksperimentaalses osas mõõdeti andmed 70 ühendi võimekuse kohta aktiveerida GFR - RET kompleksi ning seeläbi pidurdada raku hääbumist. Ühendite struktuure analüüsiti, et selgitada välja millised struktuurimotiivid põhjustavad kompleksi aktivatsiooni. Saadud andmetest arendati GFR -RET kompleksi aktivatsiooni kirjeldav QSAR mudel. Mudeli sisemine ja välimine valideerimine kinnitasid, et koostatud neljadeskriptoriline mudel on statistiliselt stabiilne, ennustusvõimeline ja kirjeldab vaadeldatavat omadust. Mudeli regressiooni korrelatsioonikoefitsient (R2) on 0;77, ristvalideeritud korrelatsioonikoefitsient (R2 cv) on 0;73. Mudeli statistilised näitajad on head arvestades asjaolu, et ennustati väga keerulist bioloogilist aktiivsust. Deskriptorid, mis esinevad parimas neljadeskritorilises mudelis, on seostatavad ligandi (madalmolekulaarse ühendi) ja sihtmärgi (GFR -RET kompleksi) vaheliste interaktsioonidega. Mudelis kasutatavad molekulaardeskriptorid kirjeldavad molekulide kuju, painduvust, laengujaotust ja elektronstruktuuri. Saadud mudel kirjeldab madalamolekulaarse ühendi GFR -RET kompleksi aktivatsiooni usaldusväärselt ning on ennustusvõimeline treeningrühmaga sarnastele ühenditele

Has education lost sight of children?

The reflections presented in this chapter are informed by clinical and personal experiences of school education in the UK. There are many challenges for children and young people in the modern education system and for the professionals who support them. In the UK, there are significant gaps between the highly selective education provided to those who pay privately for it and to the majority of those educated in the state-funded system. Though literacy rates have improved around the world, many children, particularly boys, do not finish their education for reasons such as boredom, behavioural difficulties or because education does not ‘pay’. Violence, bullying, and sexual harassment are issues faced by many children in schools and there are disturbing trends of excluding children who present with behavioural problems at school whose origins are not explored. Excluded children are then educated with other children who may also have multiple problems which often just make the situation worse. The experience of clinicians suggests that school-related mental health problems are increasing in severity. Are mental health services dealing with the consequences of an education system that is not meeting children’s needs? An education system that is testing- and performance-based may not be serving many children well if it is driving important decisions about them at increasingly younger ages. Labelling of children and setting them on educational career paths can occur well before they reach secondary schools, limiting potential very early on in their developmental trajectory. Furthermore, the emphasis at school on testing may come at the expense of creativity and other forms of intelligence, which are also valuable and important. Meanwhile the employment marketplace requires people with widely different skills, with an emphasis on innovation, creativity, and problem solving. Is education losing sight of the children it is educating

Demand-Orientated Power Production from Biogas: Modeling and Simulations under Swedish Conditions

The total share of intermittent renewable electricity is increasing, intensifying the need for power balancing in future electricity systems. Demand-orientated combined heat and power (CHP) production from biogas has potential for this purpose. An agricultural biogas plant, using cattle manure and sugar beet for biogas and CHP production, was analyzed here. The model Dynamic Biogas plant Model (DyBiM) was developed and connected to the Anaerobic Digestion Model No. 1 (ADM1). Flexible scenarios were simulated and compared against a reference scenario with continuous production, to evaluate the technical requirements and economic implications of demand-orientated production. The study was set in Swedish conditions regarding electricity and heat price, and the flexibility approaches assessed were increased CHP and gas storage capacity and feeding management. The results showed that larger gas storage capacity was needed for demand-orientated CHP production but that feeding management reduced the storage requirement because of fast biogas production response to feeding. Income from electricity increased by 10%, applying simple electricity production strategies to a doubled CHP capacity. However, as a result of the currently low Swedish diurnal electricity price variation and lack of subsidies for demand-orientated electricity production, the increase in income was too low to cover the investment costs. Nevertheless, DyBiM proved to be a useful modeling tool for assessing the economic outcome of different flexibility scenarios for demand-orientated CHP production