Search results for "550"
showing 10 items of 1192 documents
A Novel Optimization for GPU Mining Using Overclocking and Undervolting
2022
Cryptography and associated technologies have existed for a long time. This field is advancing at a remarkable speed. Since the inception of its initial application, blockchain has come a long way. Bitcoin is a cryptocurrency based on blockchain, also known as distributed ledger technology (DLT). The most well-known cryptocurrency for everyday use is Bitcoin, which debuted in 2008. Its success ushered in a digital revolution, and it currently provides security, decentralization, and a reliable data transport and storage mechanism to various industries and companies. Governments and developing enterprises seeking a competitive edge have expressed interest in Bitcoin and other cryptocurrencie…
Josefa Amar y Borbón (1749–1833):
2023
Este texto ofrece un extracto y sugerencias didácticas para indagar, desde un punto de vista histórico, cómo se construyen los cuerpos generizados. El texto elegido es la introducción de una obra pedagógica de la escritora española Josefa Amar y Borbón (1749-1833), el Discurso sobre la educación física y moral de las mujeres, libro publicado en Madrid en 1790. Este pasaje revelador de un texto del siglo XVIII, poco conocido fuera del ámbito académico, descubre los orígenes de las nociones del cuerpo generizado, socialmente moldeado y performativo, conectando la investigación histórica con los debates y temas de interés del presente. Horizon 2020/ERC-2017-Advanced Grant-787015 This text offe…
Time and heat for sexual reproduction: comparing the phenology of Chara hispida of two populations at different latitudes
2017
Abstract Geographical location affects the main ecological factors driving the timing of plants’ life events. In addition, studying phenology is the simplest procedure to track current global warming and its effects on the success and survival of different populations of the same species. Little is known about the effect of water temperature and its corresponding accumulated heat on charophytes’ phenology. We compared differences in water temperature and sexual reproductive phenology of Chara hispida in two ponds of two countries located at different latitudes (Spain and Switzerland) over the same year. We estimated the accumulated heat required to develop from one phenophase to another (un…
In situ observations of CH2Cl2 and CHCl3 show efficient transport pathways for very short-lived species into the lower stratosphere via the Asian and…
2022
Efficient transport pathways for ozone-depleting very short-lived substances (VSLSs) from their source regions into the stratosphere are a matter of current scientific debate; however they have yet to be fully identified on an observational basis. Understanding the increasing impact of chlorine-containing VSLSs (Cl-VSLSs) on stratospheric ozone depletion is important in order to validate and improve model simulations and future predictions. We report on a transport study using airborne in situ measurements of the Cl-VSLSs dichloromethane (CH2Cl2) and trichloromethane (chloroform, CHCl3) to derive a detailed description of two transport pathways from (sub)tropical source regions into the ext…
Study of η and η' Photoproduction at MAMI
2017
The reactions γp → ηp and γp → η0\ud p are measured from their thresholds up to the center-of-mass\ud energy W ¼ 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross\ud sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full\ud production-angle coverage. A strong cusp is observed in the total cross section for η photoproduction at the\ud energies in the vicinity of the η0 threshold, W ¼ 1896 MeV (Eγ ¼ 1447 MeV). Within the framework of a\ud revised ηMAID isobar model, the cusp, in connection with a steep rise of the η0 total cross section from its\ud threshold, can only be explained by a strong coupling of …
Daytime formation of nitrous acid at a coastal remote site in Cyprus indicating a common ground source of atmospheric HONO and NO
2016
Abstract. Characterization of daytime sources of nitrous acid (HONO) is crucial to understand atmospheric oxidation and radical cycling in the planetary boundary layer. HONO and numerous other atmospheric trace constituents were measured on the Mediterranean island of Cyprus during the CYPHEX campaign (CYPHEX = CYprus PHotochemical EXperiment) in summer 2014. Average volume mixing ratios of HONO were 35 pptv (±25 pptv) with a HONO/NOx ratio of 0.33, which was considerably higher than reported for most other rural and urban regions. Diel profiles of HONO showed peak values in the late morning (60±28 pptv around 09:00 local time), and persistently high mixing ratios during daytime (45±18 pptv…
Surface modification of mineral dust particles by sulphuric acid processing: implications for CCN and IN abilities
2011
Abstract. The ability of coated mineral dust particles to act as cloud condensation nuclei (CCN) and ice nuclei (IN) was investigated at LACIS (Leipzig Aerosol Cloud Interaction Simulator) during the FROST1- and FROST2-campaigns (Freezing of dust). Sulphuric acid was condensed on the particles which afterwards were optionally humidified, treated with ammonia vapour and/or heat. By means of aerosol mass spectrometry we found evidence that processing of mineral dust particles with sulphuric acid leads to surface modifications of the particles. These surface modifications are responsible for the observed reduction of the IN activation of the particles. The observed particle mass spectra sugges…
The Impact of Smart City Initiatives on Human Rights : A Qualitative Research Study
2019
Master's thesis Information Systems IS501 - University of Agder 2019 Context:A smart city is a concept where municipalities use ICTto increase efficiency, sustainability and quality of life forits citizensand city operations. Smart city initiatives useIoT technologies, enabled by ICTs to gather large volumesof unstructured data,known as BigData.The aim of any smart city initiativeisto increase thequality of lifein acity, but posesa threat tocitizens privacy, security andfreedom of expressiondue to the large volumes of databeing collected in smart cities,potentially violatingfundamental rightsin theUniversal Declaration of Human Rights.Purpose:This thesis investigatesthe connection between s…
Bruk av e-læring i spesialisthelsetjenesten - hva nå?
2014
Masteroppgave i helse- og sosialinformatikk HSI 500 Universitetet i Agder 2014 Background The demand for efficiency and collaboration in the health care industry is ever increasing. There are requirements for increased skills among health care workers. Web-based learning is a form of training that is increasingly used. The purpose of this study was to review the use of web-based learning in specialist health care services. This study aims to answer following research questions: 1) How well is it facilitated for web based learning in the health care industry, 2) How is web-based learning perceive by the user, and 3) What are the learning outcomes after having conducted web-based learning. Me…
Fracture Shape and Orientation Contributions to P-Wave Velocity and Anisotropy of Alpine Fault Mylonites
2021
P-wave anisotropy is significant in the mylonitic Alpine Fault shear zone. Mineral- and texture-induced anisotropy are dominant in these rocks but further complicated by the presence of fractures. Electron back-scattered diffraction and synchrotron X-ray microtomography (micro-CT) data are acquired on exhumed schist, protomylonite, mylonite and ultramylonite samples to quantify mineral phases, crystal preferred orientations, microfractures and porosity. The samples are composed of quartz, plagioclase, mica and accessory garnet, and contain 3-5% porosity. Based on the micro-CT data, the representative pore shape has an aspect ratio of 5:2:1. Two numerical models are compared to calculate the…