Search results for "TJ"
showing 10 items of 841 documents
Viruses : the invisible majority of the oceans
2019
On the Substitutability between Paid-employment and Self-employment: Evidence from the Period 1969–2014 in the United States
2019
This paper provides estimates of the elasticity of substitution between operational and managerial jobs in the US economy during the years 1969–2014, derived from an aggregate CES production function. Estimating the long-term relationship between (the log of) the aggregate employment/self-employment ratio and (the log of) the returns from paid-employment relative to self-employment and testing for structural breaks, we report different estimates of the elasticity of substitution in each of the two regimes identified. To this end we apply the methodology on instability tests proposed in Kejriwal and Perron (2008, 2010) as well as the cointegration tests developed in Arai and Kurozumi (2007) …
Elintarviketeollisuuden informaatio- ja tietojärjestelmätarpeet alkutuotannosta : mitä sianlihan tuotantoketjussa tulisi tulevaisuudessa kehittää?
2013
Tutkimuksen tarkoituksena on selvittää elintarviketeollisuuden informaatio- ja tietojärjestelmätarpeita sianlihan alkutuotannosta. Tutkimuksen tuloksena luotiin viisi konseptia sianlihantuotannon kehittämiseksi. Konsepteissa kuvataan elintarviketeollisuuden informaatio- ja tietojärjestelmätarpeita alkutuotannosta, tulevaisuuden tavoitteita sianlihatuotannon kehittämiseksi, nykytuotannon haasteita, sekä potentiaalisia lisäarvoa tuottavia palvelutuotteita. Tutkimuksessa otetaan huomioon uusimmat teknologiset mahdollisuudet, joita hyödyntäen ruokaketju voi kehittää toimintansa vastuullisuutta, läpinäkyvyyttä, sekä jäljitettävyyttä. Tutkimus toteutettiin laadullisena tutkimuksena, jossa tutkimu…
Food Security Is None Of Your Business? Food Supply Chain Management In Support Of A Sustainable Food System
2017
Food security is the principal outcome of any given food system and it can be defined in terms of a sustainable food system where the core goal is to feed everyone sustainably, equitably and healthily. A sustainable food system addresses needs for availability, affordability and accessibility, is diverse, ecologically-sound and resilient, and builds the capabilities and skills necessary for future generations. This paper identifies the essential elements of food supply chain management in support of a sustainable food system, which ultimately enhances food security. The existing food supply chain and food system literature is synthesized in order to study the correspondence between public i…
Biochar from Waste Derived Fuels as Low-Cost Adsorbent for Waste Hydrocarbons
2020
Abstract The aim of this study is to prove technical feasibility of combined refuse derived fuel (RDF) torrefaction and oily wastewater treatment approach by using RDF derived biochar as a sorption media. Biochars prepared from refuse derived fuels in torrefaction, carbonization and pyrolysis modes were analysed as fuels and as hydrocarbon sorbents. Changes of elemental composition and properties of material during thermal treatment and subsequent washing process have been analysed. Experimental evaluation of sorption behaviour of toluene and diesel fuel on obtained biochar performed. Our results show that torrefaction/carbonization of RDF coupled with the subsequent washing of biochar is a…
Latvijas makroekonomiskās attīstības scenāriju un prognožu novērtējums, lai izvērtētu Eiropas Komisijas pārskatīto energoefektivitātes un atjaunoto e…
2021
Nodevums projekta “Klimata mērķu ekonomiskās ietekmes modelēšana un analīze” ietvaros.
Competitiveness and Sustainability in tourist firms and destinations
2020
Tourism is a major activity in the global economy, not only in terms of its economic impact but also its social and environmental implications. The management practices and processes adopted by tourist companies and destinations are very heterogeneous and have variable impacts on the triple-bottom-line sustainability (people, profit, planet) of the ecosystem. However, there is still only limited available knowledge about the value of different practices for promoting both sustainable development and greater competitiveness. This Special Issue includes papers that present new ideas, theories, advancements, experiences, evidence or methodologies that support the convergence of economic, socia…
Epigeisko bezmugurkaulnieku sabiedrību izmaiņas augstā purva biotopu atjaunošanās gaitā dabas liegumā Cenas tīrelis
2015
Darba mērķis: pētīt augstā purva biotopu atjaunošanos ar epigeisko bezmugurkaulnieku sugu sastopamības salīdzināšanu dažādās veģetācijas zonās, analizēt to savstarpēju saistību un sugu sabiedrību nomaiņu. Darba ietvaros analizēti epigeisko bezmugurkaulnieku paraugi no četrām dažādām augstā purva zonām dabas liegumā Cenas tīrelis: apvidus ar priedēm, atjaunota hidroloģiskā režīma zona, atklāts, neskarts purvs un degradēts augstais purvs, kurā iespējama vai noris atjaunošanās. Iegūtie dati salīdzināti ar veģetācijas datiem katrā parauglaukumā. Galvenie rezultāti: dažādās augstā purva biotopu zonās vērojama neliela epigeisko bezmugurkaulnieku sugu un to sabiedrību nomaiņa. Lielākoties sugu sas…
Els esclaus, pacients i practicants de la medicina al regne de València durant la baixa edat mitjana
2021
Durant la baixa edat mitjana, l’Occident europeu experimentà un intens procés de medicalització entès en un doble sentit. D’una banda, el de la multiplicació de l’assistència mèdica, amb una extensa xarxa de guaridors (físics, cirurgians, barbers, apotecaris i manescals) i, de l’altra, l’increment de la competència com a expert del professional en nombrosos àmbits municipals i estatals en els quals abans havia estat absent fins aquell moment (hospitals, salut pública, banys, tribunals de justícia, exèrcit…). Si bé és cert que molts d’aquests àmbits s’han anat analitzant per la historiografia, un dels punts possiblement menys estudiats haja estat el de la «medicalització de l’esclavitud».
The Investment Performance of U.S. Islamic Mutual Funds
2020
Islamic investment funds have become increasingly important because of high demand from many investors, including those outside the Muslim investment community. This article compares the performance and risk sensitivity of Islamic mutual funds in the United States with that of their conventional peers. This article also analyzes the performance of Islamic funds, and compares this performance with that of socially responsible investment (SRI) mutual funds. Capital Asset Pricing Model (CAPM)-based methodology was used for the analysis. The results suggest that over the entire study period (1987&ndash