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2567 Uppsatser om Electronics and Electrical technology - Sida 25 av 172

Säkerhet i smarttelefoner : En jämförelsestudie mellan bärbara datorer och smarttelefoner i verksamheter

Smartphones have become more common as business tools within the workplace. With its many features and great flexibility, the smartphone has stormed the business world and become an alternative or complement to the laptop. As these mobile units' popularity has increased, the interest of businesses to invest in this new technology has increased, but has security kept up with the technology developments?This study aims to conduct a study to see if the companies in the IT industry have the same safety awareness for smart phones to laptops.The study shows that companies have greater safety awareness and higher safety requirements for laptops than smartphones. Meanwhile, both end-users and management are well aware of the risks and threats that the smartphone is facing..

Energibalans Dåva Kraftvärmeverk

To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an electrical switch-gear. This report describes thework with finding two solutions for measuring and log data from these surges andtransients. One temporary solution where a measurement program has beendeveloped. A second solution where different company solutions have been analyzedto decide which fits best. For these measurement solutions two solutions for bringingdown the voltage has been used.

Konstruktion och utvärdering av Current Conveyors

Normally the operational amplifier is used as a component in active filter design. The goal for future components in filter design is large bandwith and the use of low supply voltages. The use of current-mode instead of voltage-mode circuits gets a step closer to the required performance. A component that use current as the signal conveying part is the current conveyor. In this report a comparative study between two current conveyor structures of second generation (CCII) is performed.

Cyborglandskap : landskapet, människan och teknologin

By using the cyborg as a structural tool to analyze certain aspects of human interaction with what can be perceived as landscape or landscape architectural elements, this thesis seeks to explore the concept of the cyborg landscape in order to place human practice in the context of postmodern ideas of the end of true nature. Ever since human kind has externalized evo-lution by using tools and extending the body with technological inventions, we have also taken our surroundings out of their natural trajectory. Everything we do that is conditioned by the use of technology is altering that which we perceive as nature and natural. Since we have been doing this for millennia we have of course also altered our surroundings by the influence of technology.This thesis uses three examples of landscape or landscape architectural elements that are conditioned by the integration of technology to explore this practice through a postmodern model of analysis based on the concept and basic premises of the cyborg, or the cybernetic organism. A cybernetic organism is in short an organism that has functioning technological parts integrated into its system.

Att designa användargränssnitt för äldre människor med afasi

Our aim in this work has been to redesign ModernFamilies and make a user-friendly interface for people with aphasia. The focus has been to identify general issues they might face while using different technology and applications, in order to find better alternative design for ModernFamilies, with a focus on usability. To approach this issue, we used a qualitative method. Our study includes several interviews and observations preformed in conjunction with the AGNES project (AGeing in a NEtworked Society) and speech therapists. Aphasia requires simple design that in the same time gives them support to understand and use technology and different applications.

ZigBee-teknikens möjligheter att trådlöst överföra EKG-signaler

In many clinical applications, it is desirable to transmit sensor information wireless. In earlier research, investigation transmit ECG signal using Bluetooth, was performed. However, when Bluetooth has some drawbacks it is of interest to investigate alternative methods, one such method is ZigBee. Bluetooth has higher data rate speed (1Mbps) than ZigBee (250kbps). However, Bluetooth consumes more power.

Säkerhetsstandard för ett mjukvarubaserat säkerhetselement

Researchers today anticipate that in the near future, the majority of the owners of a smartphone will use it as a wallet, i.e. for contactless payment. The technology that enables contactless payment today is ?Near Field Communication? (NFC), which is increasingly embedded in smartphones. Applications like mobile payment between a phone and a terminal use NFC.

Digital delaktighet i Sverige : Om att inkludera alla i framtidens samhälle

Almost all Swedes today have access to the Internet, if not through the home then via the library or work. Despite this, around 20% of the population stand outside the information society in that they lack in knowledge, assistive usability tools or positive attitude towards technology and its influence on society. The main factors influencing the digital divide in today's society are age, disability and education, while the main reason for staying outside seems to be disinterest.The question about digital inclusion is important as we now stand on the breaking-point between a society where the industry has had a prominent position for private as well as national economy and a digital society where access to the Internet is no longer about prestige, but where significant differences between users' knowledge levels can create a power gap. Gaps in access and use not only reflects already existing socio-economic conditions, but can also maintain and enhance these.It is crucial for the future expansion of Internet usage how today's non-users feel about becoming users. To understand what underlies the motivations not to use computers is one of the keys to get non-users to embrace becoming users.

Att väcka tankar och känslor om jämställdhet. En studie om enhetschefers styrning av närbyråkraters jämställdhetsarbete.

Current technology offers many possibilities for remotecommunication. Nevertheless, people with cognitive and communicativedisabilities have limited access to common communication technology like textmessaging via a mobile phone. This study is part of the project Text messagingwith picture symbols - a possibility for AAC users and people with cognitiveimpairments. Semi structured interviews were used to investigate three menand four women?s experiences of using Windows mobiles with adaptedfunctions for text messaging.

Mät och loggningsutrustning för spänningstransienter.

To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an electrical switch-gear. This report describes thework with finding two solutions for measuring and log data from these surges andtransients. One temporary solution where a measurement program has beendeveloped. A second solution where different company solutions have been analyzedto decide which fits best. For these measurement solutions two solutions for bringingdown the voltage has been used.

Från distributionsnät till skarvkabel

Denna uppsats handlar om en kurs, vid namn Elkompetens A, en grundläggande, men också behörighetsgivande kurs som ingår i Elprogrammets obligatoriska kurser. Den genomförs vid Carlsunds Utbildningscentrum i Motala på elprogrammets första årskurs.I detta arbete har jag försökt få svar på, vilken av två olika arbetsupplägg, som gav eleverna mest utbyte i form av kunskaper att bygga vidare på i nästkommande årskurser. Den stora skillnaden i uppläggen, är utgångspunkten för kursen. Efterforskningen är i första hand byggd på intervjuer med elever ur två olika årskullar..

Layout-generator för sifferseriell tvåportsadaptor

Vid sifferseriell aritmetik används ett antal parallella bitar för varje siffra. För att jämföra prestanda och effektförbrukning i förhållande till antalet bitar behövde Institutionen för systemteknik (ISY) en layout-generator för att enkelt kunna generera layout för en sifferseriell tvåportsadaptor. Layouten skulle göras i 0.18 mikrometer process. Antalet inkommande databitar och antalet koefficientbitar skulle vara variabelt. Stor vikt lades vid planeringen av layouten för att genereringen av adaptorn skulle fungera smidigt oberoende av de variabla parametrarna.

Teknikundervisning för yngre barn? : Förskollärares, lärares och anställda i näringslivets attityder till Teknik och Teknikundervisning för barn i yngre åldrar

Syftet med denna studie är att uppmärksamma attityder till Teknik hos förskollärare, lärare, skolledare och näringslivsrepresentanter och försöka ta reda på tänkbara orsaker bakom dessa attityder för att se möjligheter och svårigheter i arbetet med ämnet. Den forskningsfråga jag kommer att försöka besvara lyder: ? Hur ser några ?tidigarelärare? förskollärare och representanter från näringslivet på barns tidiga möten med Teknik? De empiriska data som studien bygger på kommer från 83 enkäter och 2 intervjuer. Enkäterna besvarades av 28 förskollärare, 30 lärare och 25 anställda i näringslivet. Intervjuerna hölls med en person ur ledningen på ett större företag och en skolledare.

En obetydlig kostnad för eleverna. Hur fyra svenska grundskolor tillämpar avgifter.

Current technology offers many possibilities for remotecommunication. Nevertheless, people with cognitive and communicativedisabilities have limited access to common communication technology like textmessaging via a mobile phone. This study is part of the project Text messagingwith picture symbols - a possibility for AAC users and people with cognitiveimpairments. Semi structured interviews were used to investigate three menand four women?s experiences of using Windows mobiles with adaptedfunctions for text messaging.

Reglering av vridbord

This report describes a master thesis performed at Saab in Arboga. The main purpose was to build a controller for a system containing a turn table and an antenna beam. The idea is to use this system on a boat where it will be exposed to position disturbances due to waves. The desired behaviour is that antennas placed on the antenna beam should point towards the same target all the time. To solve this problem the system has been modeled and simulated in Matlab and Simulink.

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