Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(S FAMA). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters

1. Ansari, Seema. Analysis of MAC Strategies for Underwater Acoustic Networks.

Degree: 2019, UMA Editorial

Esta tesis presenta una investigación sobre los protocolos MAC utilizados en la comunicación subacuática para explorar el mundo submarino. Los protocolos MAC ayudan en el acceso al medio compartido y la recopilación de datos de los océanos, para monitorizar el clima y la contaminación, la prevención de catástrofes, la navegación asistida, la vigilancia estratégica y la exploración de los recursos minerales. Esta investigación beneficiará a sectores como las industrias militares, de petróleo y gas, pesquerías, compañías de instrumentación subacuática, organismos de investigación, etc. El protocolo MAC afecta la vida útil de las redes inalámbricas de sensores. La eficiencia energética de las redes acústicas submarinas se ve gravemente afectada por las propiedades típicas de la propagación de las ondas acústicas. Los largos retrasos de propagación y las colisiones de paquetes de datos dificultan la transmisión de los paquetes de datos, que contienen información útil para que los usuarios realicen tareas de supervisión colectivas. El objetivo de este estudio es proponer nuevos mecanismos para protocolos MAC diseñados para funcionar en redes acústicas submarinas, con el propósito de mejorar su rendimiento. Para alcanzar ese objetivo es necesario realizar un análisis comparativo de los protocolos existentes. Lo que además sienta un procedimiento metodológicamente correcto para realizar esa comparación. Como la comunicación subacuática depende de ondas acústicas, en el diseño de los protocolos de MAC submarinos surgen varios desafíos como latencia prolongada, ancho de banda limitado, largas demoras en la propagación, grandes tasas de error de bit, pérdidas momentáneas en las conexiones, severo efecto multicamino y desvanecimientos. Los protocolos MAC terrestres, si se implementan directamente, funcionarán de manera ineficiente. Advisors/Committee Members: Poncela-Gonzalez, Javier, Otero Roth, Pablo, Ingeniería de Comunicaciones.

Subjects/Keywords: MAC - Tesis doctorales; MAC protocols; Underwater; S-FAMA; MultiACK; EarlyACK

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ansari, S. (2019). Analysis of MAC Strategies for Underwater Acoustic Networks. (Thesis). UMA Editorial. Retrieved from http://hdl.handle.net/10803/665729

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ansari, Seema. “Analysis of MAC Strategies for Underwater Acoustic Networks.” 2019. Thesis, UMA Editorial. Accessed December 10, 2019. http://hdl.handle.net/10803/665729.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ansari, Seema. “Analysis of MAC Strategies for Underwater Acoustic Networks.” 2019. Web. 10 Dec 2019.

Vancouver:

Ansari S. Analysis of MAC Strategies for Underwater Acoustic Networks. [Internet] [Thesis]. UMA Editorial; 2019. [cited 2019 Dec 10]. Available from: http://hdl.handle.net/10803/665729.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ansari S. Analysis of MAC Strategies for Underwater Acoustic Networks. [Thesis]. UMA Editorial; 2019. Available from: http://hdl.handle.net/10803/665729

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Karlstad University

2. Rehnby, Nicklas. Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market.

Degree: Karlstad Business School, 2016, Karlstad University

This essay will compare the capital asset pricing model (CAPM), Fama and French threefactor model and Carhart´s four-factor model, to see which of these models that can explain portfolio excess returns best on the Swedish stock market. This thesis will tempt to validate the three and four-factor models because of the limited amount of research done on the Swedish stock market. The results indicate that the three-factor model improves explanatory power for portfolio returns in comparison to the CAPM, and the four-factor model gives a small improvement in the explanatory power compared to the three-factor model. The results also indicate that all models have a low explanatory power when the market is volatile.

Subjects/Keywords: Fama and French three-factor model; Carhart´s four-factor model; Capital Asset Pricing Model (CAPM); portfolio returns; excess returns; Swedish stock market

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Rehnby, N. (2016). Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market. (Thesis). Karlstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-43784

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Rehnby, Nicklas. “Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market.” 2016. Thesis, Karlstad University. Accessed December 10, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-43784.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Rehnby, Nicklas. “Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market.” 2016. Web. 10 Dec 2019.

Vancouver:

Rehnby N. Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market. [Internet] [Thesis]. Karlstad University; 2016. [cited 2019 Dec 10]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-43784.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rehnby N. Does the Fama-French three-factor model and Carhart four-factor model explain portfolio returns better than CAPM? : - A study performed on the Swedish stock market. [Thesis]. Karlstad University; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-43784

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.