Search results for "AAT"
showing 10 items of 6105 documents
The Extractive Industries Transparency Initiative (EITI) in Cameroon : realities and prospects
2010
For a long time, Cameroon was a success story in the context of Africa’s development. Unfortunately, the economic crises of the eighties and early nineties led to the failure of the development strategies that had been pursued until then, resulting in a severe deterioration of the country’s economy and the living standards of the Cameroonian people (Mentan, 2003). However, this country possesses significant oil wealth which if properly managed can generate abundant revenue to boost economic growth and fund anti-poverty measures. In 2005, Cameroon adhered to the Extractive Industries Transparency Initiative (EITI). A proper implementation of this initiative will improve transparency in the c…
Energy efficient model for biogas production in farm scale
2011
Energy efficient solutions for six farm biogas production was found by calculating mass and energy balance in different scenarios. Raw materials in biogas production were cow manure and grass silage that were produced in these farms. There were calculated mass and energy balances on average for one year biogas prouduction that consisted of grass silage production, raw material transportation and biogas production in the biogas plant. In addition, direct greenhouse gases from biogas production were estimated. The direct mass and energy flows were calculated. It turned out that one input energy unit can produce 5.0 to 5.5 energy units as heat and electricity. Biogas reactor consumed heat from…
Britain through American eyes : a comparative study of two traveller's accounts
2004
Semi-natural habitats in boreal Europe: a rise of a social-ecological research agenda
2021
The European continent contains substantial areas of semi-natural habitats, mostly grasslands, which are among the most endangered habitats in Europe. Their continued existence depends on some form of human activity, for either production or conservation purposes, or both. We examined the share of semi-natural grasslands within the general grassland areas in boreal Europe. We reviewed research literature across the region to compile evidence on semi-natural grasslands and other semi-natural habitats, such as wooded pastures, in respect to a range of topics such as ecology, land-use change, socioeconomics, and production. We also explored drivers of the research agenda and outlined future re…
Trends in perceived school stress among adolescentsin five Nordic countries 2002–2014
2019
Abstract Associations between school-related stress and poor health, risk behaviours and low well-being are well documented. The aim of this paper was to estimate trends of perceived school stress experienced by boys and girls of different ages in the Nordic countries, and to describe trends in school stress between the Nordic countries. Nordic data from the Health Behaviour in School-aged Children study (HBSC) between 2002 and 2014 were used. The participants were aged 11–16 years. School stress was measured by a single item; “How pressured do you feel by schoolwork?” The participants answering “some” or “a lot” were categorised as reporting school stress. Sweden, Norway and Denmark had …
Tuottaako pohjoismainen malli hyvää työelämän laatua vielä tulevaisuudessakin?
2017
Pohjoismaat ovat perinteisesti erottuneet työelämän laatuvertailuissa Euroopan ykkösinä. Taustalla vaikuttavat työmarkkinoiden palveluvaltaisuus ja korkea työvoiman osaamistaso, mutta myös erilaiset institutionaaliset tekijät, kuten työmarkkinoiden sääntely, ammattiyhdistysliikkeen asema ja sosiaalipoliittiset ratkaisut. Työelämän laatu voi kuitenkin heikentyä, kun näitä ankkureita kierretään tai kun ne eivät tavoita kaikkien alojen työntekijöitä. Organisaatioiden uudelleenjärjestelyt, ulkoistaminen ja alihankinta sekä uusien alojen ja työnteon uusien muotojen syntyminen saattavat heikentää työelämän laatua. nonPeerReviewed
Trilineaariset koordinaatit
2012
Cleavage of Ge–Ge and Sn–Sn Triple Bonds in Heavy Group 14 Element Alkyne Analogues (EAriPr4)2 (E = Ge, Sn; AriPr4 = C6H3-2,6(C6H3-2,6-iPr2)2) by Rea…
2016
The reactions of heavier group 14 element alkyne analogues (EAriPr4)2 (E = Ge, Sn; AriPr4 = C6H3-2,6-(C6H3-2,6-iPr2)2) with the group 6 transition-metal carbonyls M(CO)6 (M = Cr, Mo, W) under UV irradiation resulted in the cleavage of the E–E triple bond and the formation of the complexes {AriPr4EM(CO)4}2 (1–6), which were characterized by single crystal X-ray diffraction as well as by IR and multinuclear NMR spectroscopy. Single-crystal X-ray structural analyses of 1–6 showed that the complexes have a nearly planar rhomboid M2E2 core with three-coordinate group 14 atoms. The coordination geometry at the group 6 metals is distorted octahedral formed by four carbonyl groups as well as two br…
Synthesis and Structures of Aluminum and Magnesium Complexes of Tetraimidophosphates and Trisamidothiophosphates: EPR and DFT Investigations of the P…
2005
Reactions of (RNH)3PNSiMe3 (3a, R = tBu; 3b, R = Cy) with trimethylaluminum result in the formation of {Me2Al(μ-NtBu)(μ-NSiMe3)P(NHtBu)2]} (4) and the dimeric trisimidometaphosphate {Me2Al[(μ-NCy)(μ-NSiMe3)P(μ-NCy)2P(μ-NCy)(μ-NSiMe3)]AlMe2} (5a), respectively. The reaction of SP(NHtBu)3 (2a) with 1 or 2 equiv of AlMe3 yields {Me2Al[(μ-S)(μ-NtBu)P(NHtBu)2]} (7) and {Me2Al[(μ-S)(μ-NtBu)P(μ-NHtBu)(μ-NtBu)]AlMe2} (8), respectively. Metalation of 4 with nBuLi produces the heterobimetallic species {Me2Al[(μ-NtBu)(μ-NSiMe3)P(μ-NHtBu)(μ-NtBu)]Li(THF)2} (9a) and {[Me2Al][Li]2[P(NtBu)3(NSiMe3)]} (10) sequentially; in THF solutions, solvation of 10 yields an ion pair containing a spirocyclic tetraimid…