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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Har längden betydelse? : En kvantitativ studie av elevers textstrukturer

Åberg, Johannes January 2013 (has links)
Abstract Johannes Åberg 2012: Har längden betydelse? – En kvantitativ studie av elevers textstrukturer. Does the length matter? – A quantitative study of student text structures. Essay writing is one part of the national test in the school subject Swedish. Here the student gets the opportunity to demonstrate that it is able to follow instructions and produce a coherent text. The examinator's task hereby becomes a troublesome process with subtle distinctions between rights and wrongs. This quantitative study consists of an investigation of the significance of length in students’ texts, i.e. text length, sentence length and word length. The aim is to collate the texts grade with these three aspects of length and also compare feminine and masculine language features. 17 student texts from the 2011 national test in Swedish for students aged 15, written by nine girls and eight boys from the grade levels not achieving the goals, satisfactory and very well satisfactory, form the basis for the study. These are three grade levels in a scale of four, where the second highest has been omitted. The results indicate that the answer to the question in the title is yes and furthermore that boys and girls use the length variable in different ways. For instance, boys tend to produce shorter texts with more longer words. There is also a slight correlation between short sentences and high grades. Finally, it seems to be of the highest concern to write a longer text if you want to avoid the lowest grade.
2

Konstruktion av Industriellt Vibrationsmätningssystem med signalbehandling baserad på Digitala Vågfilter av Lattice-struktur / Construction of Industrial Vibration Measurement System with signal-processing based on Lattice Wave Digital filter structures

Tegelid, Simon, Åström, Jonas January 2010 (has links)
<p>In this bachelor thesis a complete prototype of an industrial vibration measurement platform has been developed. By measuring a number of variables such as acceleration, temperature and speed conclusions can be drawn on machinery health. The aim is to evaluate hardware and software solutions for a possible future product. Based on a requirement specification a proper hardware design has be developed. The hardware consists of a four-layer PCB with an ARM Cortex-M3 microcontroller and about 250 other components. The PCB was designed, assembled, tested and finally housed in a box. Measures have been taken to protect the prototype against external disturbances such as inappropriate supply voltages and transients on the input stages.Software has been written for the microcontroller to perform the various measurements required by the prototype. These include RMS, integration and filtering. Special attention was paid to the latter by implementing filters based on lattice wave digital structures. This structure results in a very efficient implementation. Consideration is taken to be able to generate arbitrary filters independent of the characteristics and design method. To save time the microcontroller implements all the algorithms without any floating point numbers.Furthermore, both hardware and software are adapted for future industrial use. The finished prototype supports a number of communication interfaces in which Modbus (RS-485) and current loop communication can be mentioned.The final result is a very good performing platform with strong future potential.The work was commissioned by the consulting firm Syncore Technologies AB at their office in Mjärdevi, Linköping. The project has, in total, taken 10 weeks and occurred during spring 2010.In this bachelor thesis a complete prototype of an industrial vibration measurement platform has been developed. By measuring a number of variables such as acceleration, temperature and speed conclusions can be drawn on machinery health. The aim is to evaluate hardware and software solutions for a possible future product. Based on a requirement specification a proper hardware design has be developed. The hardware consists of a four-layer PCB with an ARM Cortex-M3 microcontroller and about 250 other components. The PCB was designed, assembled, tested and finally housed in a box. Measures have been taken to protect the prototype against external disturbances such as inappropriate supply voltages and transients on the input stages.Software has been written for the microcontroller to perform the various measurements required by the prototype. These include RMS, integration and filtering. Special attention was paid to the latter by implementing filters based on lattice wave digital structures. This structure results in a very efficient implementation. Consideration is taken to be able to generate arbitrary filters independent of the characteristics and design method. To save time the microcontroller implements all the algorithms without any floating point numbers.Furthermore, both hardware and software are adapted for future industrial use. The finished prototype supports a number of communication interfaces in which Modbus (RS-485) and current loop communication can be mentioned.The final result is a very good performing platform with strong future potential.The work was commissioned by the consulting firm Syncore Technologies AB at their office in Mjärdevi, Linköping. The project has, in total, taken 10 weeks and occurred during spring 2010.</p>
3

Konstruktion av Industriellt Vibrationsmätningssystem med signalbehandling baserad på Digitala Vågfilter av Lattice-struktur / Construction of Industrial Vibration Measurement System with signal-processing based on Lattice Wave Digital filter structures

Tegelid, Simon, Åström, Jonas January 2010 (has links)
In this bachelor thesis a complete prototype of an industrial vibration measurement platform has been developed. By measuring a number of variables such as acceleration, temperature and speed conclusions can be drawn on machinery health. The aim is to evaluate hardware and software solutions for a possible future product. Based on a requirement specification a proper hardware design has be developed. The hardware consists of a four-layer PCB with an ARM Cortex-M3 microcontroller and about 250 other components. The PCB was designed, assembled, tested and finally housed in a box. Measures have been taken to protect the prototype against external disturbances such as inappropriate supply voltages and transients on the input stages.Software has been written for the microcontroller to perform the various measurements required by the prototype. These include RMS, integration and filtering. Special attention was paid to the latter by implementing filters based on lattice wave digital structures. This structure results in a very efficient implementation. Consideration is taken to be able to generate arbitrary filters independent of the characteristics and design method. To save time the microcontroller implements all the algorithms without any floating point numbers.Furthermore, both hardware and software are adapted for future industrial use. The finished prototype supports a number of communication interfaces in which Modbus (RS-485) and current loop communication can be mentioned.The final result is a very good performing platform with strong future potential.The work was commissioned by the consulting firm Syncore Technologies AB at their office in Mjärdevi, Linköping. The project has, in total, taken 10 weeks and occurred during spring 2010.In this bachelor thesis a complete prototype of an industrial vibration measurement platform has been developed. By measuring a number of variables such as acceleration, temperature and speed conclusions can be drawn on machinery health. The aim is to evaluate hardware and software solutions for a possible future product. Based on a requirement specification a proper hardware design has be developed. The hardware consists of a four-layer PCB with an ARM Cortex-M3 microcontroller and about 250 other components. The PCB was designed, assembled, tested and finally housed in a box. Measures have been taken to protect the prototype against external disturbances such as inappropriate supply voltages and transients on the input stages.Software has been written for the microcontroller to perform the various measurements required by the prototype. These include RMS, integration and filtering. Special attention was paid to the latter by implementing filters based on lattice wave digital structures. This structure results in a very efficient implementation. Consideration is taken to be able to generate arbitrary filters independent of the characteristics and design method. To save time the microcontroller implements all the algorithms without any floating point numbers.Furthermore, both hardware and software are adapted for future industrial use. The finished prototype supports a number of communication interfaces in which Modbus (RS-485) and current loop communication can be mentioned.The final result is a very good performing platform with strong future potential.The work was commissioned by the consulting firm Syncore Technologies AB at their office in Mjärdevi, Linköping. The project has, in total, taken 10 weeks and occurred during spring 2010.
4

MVG-texter: homogen grupp eller brett spektrum? En textanalytisk undersökning av elevtexter från det nationella provet i Svenska B

Pehrsson, Malin January 2009 (has links)
<p>I denna undersökning studeras 20 MVG-texter från det nationella provet i Svenska B. Syftet är att undersöka spannet MVG: om det finns gemensamma högbetygsdrag samt könsskillnader och olikheter mellan texttyper. Vissa undersökningar genomförs på samtliga 20 texter; på fyra texter utförs mer djupgående analyser. Fyra texter bedöms av oberoende bedömare och erhåller nya betyg. Resultaten visar att spannet MVG är brett även om genomsnittliga värden för materialet som helhet visar på en del traditionella högbetygsdrag, exempelvis textlängd. Det breda spannet beror dels på att kvalitetstexter kan se ut på olika sätt, dels på att materialet innehåller texter som egentligen inte når upp till kriterierna för betyget MVG.</p>
5

MVG-texter: homogen grupp eller brett spektrum? En textanalytisk undersökning av elevtexter från det nationella provet i Svenska B

Pehrsson, Malin January 2009 (has links)
I denna undersökning studeras 20 MVG-texter från det nationella provet i Svenska B. Syftet är att undersöka spannet MVG: om det finns gemensamma högbetygsdrag samt könsskillnader och olikheter mellan texttyper. Vissa undersökningar genomförs på samtliga 20 texter; på fyra texter utförs mer djupgående analyser. Fyra texter bedöms av oberoende bedömare och erhåller nya betyg. Resultaten visar att spannet MVG är brett även om genomsnittliga värden för materialet som helhet visar på en del traditionella högbetygsdrag, exempelvis textlängd. Det breda spannet beror dels på att kvalitetstexter kan se ut på olika sätt, dels på att materialet innehåller texter som egentligen inte når upp till kriterierna för betyget MVG.
6

Språket i läroböcker i matematik : En textanalytisk studie av läroböcker i ämnet matematik på gymnasial nivå / The Language in Textbooks for Mathematics : A Text Analysis of Textbooks for Mathematics Courses at Upper Secondary School

Erlandsson, Josefine January 2012 (has links)
Syftet med studien var att genom textanalys granska språket i tre valda läroböcker inomämnet matematik, på gymnasial nivå, med tonvikt på deras läsbarhet. De tre valdaläroböckerna, Matematik 4000 Kurs C Blå, Matematik från A till E. Gymnasiets matematikkurs C och Tal &amp; Rum NT kurs C+D, har analyserats med avseende på deras samspel mellantext, bilder och figurer, orsakssamband, ovanliga ord, ämnesspecifika ord, sammansatta ord,långa ord, ordlängd, nominaliseringar, nominalfraser, fundament, meningslängd ochmeningsbyggnad. Datan har utgjorts av ett kapitel ur respektive bok, som behandlarexponentialfunktioner och logaritmer. Respektive kapitel har skrivits av och den digitalaversionen har sedan analyserats ur ovan nämnda perspektiv. Huruvida de tre läroböckernasläsbarhet kan betraktas som god, beror på ett antal faktorer. Resultatet av studien visar blandannat att läroböckerna innehåller en del ord och termer, implicita orsakssamband samtmeningsbyggnad som kan vålla problem för en ovan läsare. Trots sin texttyp och sinvetenskapliga komplexitet, har läroböckerna i vissa avseenden en god läsbarhet. Exempelvisvisade LIX för texterna att Matematik 4000 och Tal &amp; Rum är medelsvåra, medan Matematikfrån A till E är lättläst.
7

Wordlength inference in the Spade HDL : Seven implementations of wordlength inference and one implementation that actually works / Ordlängdsinferans i Spade HDL : Sju olika implementationer av ordlängdsinferens och en implementation som faktiskt fungerar

Thörnros, Edvard January 2023 (has links)
Compilers, complex programs with the potential to greatly facilitate software and hardware design. This thesis focuses on enhancing the Spade hardware description language, known for its user-friendly approach to hardware design. In the realm of hardware development data size - for numerical values data size is known as "wordlength" - plays a critical role for reducing the hardware resources. This study presents an innovative approach that seamlessly integrates wordlength inference directly into the Spade language, enabling the over-estimation of numeric data sizes solely from the program's source code. The methodology involves iterative development, incorporating various smaller implementations and evaluations, reminiscent of an agile approach. To assess the efficacy of the wordlength inference, multiple place and route operations are performed on identical Spade code using various versions of nextpnr. Surprisingly, no discernible impact on hardware resource utilization emerges from the modifications introduced in this thesis. Nonetheless, the true significance of this endeavor lies in its potential to unlock more advanced language features within the Spade compiler. It is important to note that while the wordlength inference proposed in this thesis shows promise, it necessitates further integration efforts to realize its full potential.

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