Search results for "purpose"
showing 10 items of 297 documents
The language learning strategies of students at a University of Applied Sciences and how strategy use correlates with learning success
2017
Kielenoppimisstrategiat ovat keinoja, joita oppijat käyttävät ohjaamaan ja tehostamaan omaa oppimistaan. Oppimisstrategioiden monipuolisen käytön on havaittu vaikuttavan kielenoppimisen onnistumiseen. Oppimisstrategioiden käytössä on kuitenkin tärkeää, että oppijat osaavat soveltaa oikeaa oppimisstrategiaa eri oppimistilanteissa. Tämän takia on tärkeää, että oppijoita ohjataan strategioiden käytössä, jotta he kehittyvät omien strategioidensa arvioijina ja osaavat soveltaa strategioitaan. Tutkimuksen tavoitteena oli selvittää, millaisia oppimisstrategioita ammattikorkeakouluopiskelijat käyttävät, onko opiskelijoiden strategioiden käytön ja heidän menestyksensä pakollisella työelämän englanni…
Plant regeneration from juvenile and adult Anthyllis cytisoides, a multipurpose leguminous shrub
1997
Summary Anthyllis cytisoides , a legume shrub used for afforestation and reclamation of degraded Mediterranean areas, was successfully micropropagated from expiants of juvenile (cotyledonary nodes and apical buds) and adult origin (axillary buds). Multiple shoot formation was dependent on the presence of benzyladenine in the induction medium. Of the salt formulation and expiants examined, the higher proliferation rates were obtained when axillary buds from adult plants were cultured on a modified Schenk and Hildebrandt medium. Following the preferred protocol, shoot yield reached values greater than 100 shoots per expiant. Plants were easily rooted and transplanted into greenhouse.
About the Smart Weather Station
2016
Abstract Until recently, the Romanian weather stations utilized ordinary transducers that acquire useful information related to the desired physical inputs. These inputs will be converted into electrical signals easy to be processed by analog to digital converters. This paper proposed a new approach based on smart sensors system that change the interior behavior in order to optimize data acquirements from the environment. The smart sensor characteristics are stored into himself in a transducer electronic data sheet form (TEDS). The intelligent transducer generat together with the measured analogic signal also a digital interface. Through this interface the transducer’s catalog data can be r…
Security Threats in ZigBee-Enabled Systems: Vulnerability Evaluation, Practical Experiments, Countermeasures, and Lessons Learned
2013
In this paper, two practical attacks against ZigBee security are proposed and the latter one is also carried out in our laboratory environment. The attack scenarios are based on utilizing several vulnerabilities found from the main security components of ZigBee technology. The first attack is based on sabotaging the ZigBee End-Device by sending a special signal that makes it wake-up constantly until the battery runs out. The second attack is based on exploiting the key exchange process in ZigBee when using the Standard Security level defined by the ZigBee specification: we also demonstrate with experimental figures that attacks against ZigBee-enabled devices become practical by using our at…
Energy Efficient Optimization for Solar-Powered UAV Communications System
2021
In this work, we explore the energy efficiency optimization for a solar-powered unmanned aerial vehicle (UAV) communications system. We consider a scenario where a number of ground users (GUs) connect with a solar-powered multi-antenna UAV over a wireless link. First, we are able to derive the relations between the uplink data rate and heading angle of UAV and transmission power of GUs. In addition, the harvested energy from solar light is also affected by UAV’s angle. Accordingly, with the objective to maximize the energy efficiency that is related to uplink data rate and energy consumption, we propose to dynamically adjust the UAV trajectory and gesture, by optimizing its velocity, accele…
The impact of the age of vines on soil hydraulic conductivity in vineyards in eastern Spain
2017
Soil infiltration processes manage runoff generation, which in turn affects soil erosion. There is limited information on infiltration rates. In this study, the impact of vine age on soil bulk density (BD) and hydraulic conductivity (Ks) was assessed on a loam soil tilled by chisel plough. Soil sampling was conducted in the inter row area of six vineyards, which differed by the age from planting: 0 (Age 0; just planted), 1, 3, 6, 13, and 25 years (Age 1, Age 3, Age 6, Age 13, and Age 25, respectively). The One Ponding Depth (OPD) approach was applied to ring infiltration data to estimate soil Ks with an α* parameter equal to 0.012 mm-1. Soil bulk density for Age 0 was about 1.5 times greate…
Aktivitāšu izstrāde nozares angļu valodas apguvei
2019
Lai saglabātu konkurētspēju savā jomā, profesionāļiem ir jāattīsta jomai atbilstošu angļu valodas zināšanu apguve, bet aizvien pieaugošais pieprasījums pēc nozaru angļu valodas apmācībām rada pieprasījumu arī pēc kompetentiem pasniedzējiem un mācību materiāla izstrādātājiem. Šis darbs tika izstrādāts ar mērķi pētīt nozaru angļu valodas mācību materiālu izveides procesu, kā arī, apmācot studentus, radīt oriģinālu mācību materiālu konkrētai Finanšu menedžmenta programmas studentu grupai. Lai izveidotu šo materiālu, tika iegūti kvalitatīvie dati, analizējot nodarbību laikā novērotos procesus. Jaunizveidotais materiāls tika veiksmīgi izmantots praksē.
The European sTANDEM project for certification in medical English: standards, acceptability and transgression(s)
2014
In the global world of international communication, employers or institutions that wish to determine the language skills of non-native speakers of English usually turn to generalist proficiency tests such as the TOEFL (Test of English as a Foreign Language) or the slightly more business-oriented TOEIC (Test of English for International Communication). These tests enable test takers to certify that they have reached a certain level in skills needed in everyday life and, sometimes, workplace situations, but they do not assess language skills for specific purposes.Aware of this vacuum, a consortium of European teachers/researchers and international experts in the domain of medical English unde…
Effect of the junction angle on turbulent flow at a hydraulic confluence
2018
Despite the existing knowledge concerning the hydrodynamic processes at river junctions, there is still a lack of information regarding the particular case of low width and discharge ratios, which are the typical conditions of mountain river confluences. Aiming at filling this gap, laboratory and numerical experiments were conducted, comparing the results with literature findings. Ten different confluences from 45 ∘ to 90 ∘ were simulated to study the effects of the junction angle on the flow structure, using a numerical code that solves the 3D Reynolds Averaged Navier-Stokes (RANS) equations with the k- ϵ turbulence closure model. The results showed that the higher the junction angle, the …
ChemInform Abstract: Preparation of N,O-Aminals as Synthetic Equivalents of H2C=NAr and (H2C=NHAr)+ Ions: Neutral- and Acid-Promoted Transformations.
1988
A general method for the synthesis of N,O-aminals derived from primary aromatic amines is described. The reactivity of these compounds under neutral and acidic conditions has been studied and the title compounds can be envisaged as general purpose H2CNAr or (H2CNHAr)+ equivalents. N,O-Aminals have been converted into perhydrotriazines by moderate heating and into bis(4-aminoaryl)methane derivatives or N-benzylarylamines, respectively when heated in acidic media with pH control. Reduction of N,O-acetals with sodium cyanoborohydride has revealed that the C–O bond is broken exclusively in acidic media.