Dissertations / Theses on the topic 'Mufu'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Mufu.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Po, Chung Yam. "Westerners in Li Hongzhang's mufu : with references to Gustav Detring and Hosea Ballou Morse." HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1107.
Full textHuapaya, Navarro Cesar Ernesto Benjamín, Alvarado Luz Medali Pitot, Villarroel Angela Carol Rodriguez, and Pomalaza Ana Beatriz Rozas. "Muru café." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/652226.
Full textThe trend of healthy consumption is generating more people opt for more natural beverages, which is a trend in consumption worldwide. Likewise, in the world there is a high preference in the consumption of coffee (95%), whose by-products such as coffee husk have not been well used and currently more than 80% are wasted generating environmental pollution and in other cases use as fertilizer, only in some countries of the world and Latin America are innovating with by-products and are using the husk to produce new products such as infusions, jams, yogurt, etc. Peru is not exempt from this, that is why Muru Café is born, a natural drink based on coffee husks, zero sugars, with high carbohydrate, protein and mineral content, 500 times more antioxidant than vitamin C, with light sweetness and beneficial to health due to its nutritional value. In the Peruvian market there is this type of natural beverage, but it has not been industrialized for commercialization in the market, so it represents an opportunity to venture into the business. In addition, through market research, it was possible to validate the target audience and the indirect distribution channels to sell beverages in minimarkets, convenience stores, naturists and supermarkets. Likewise, the work team is highly trained and experienced in production, sales, administration and finance, which allows us to develop a viable, profitable and sustainable project over time.
Trabajo de investigación
Yuen, Jeanne Y. Y. "Computer Go-Muku." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64063.
Full textCcora, Camayo Diego Andrés, Arroyo Rosa Cristal Pareja, Tavara Nicole Annette Seperak, Robles Bryan Manuel Stewart, and Martínez Jaime Tacuchi. "Línea de útiles ecoamigables Muru." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/651782.
Full textThe present project shows the viability of the execution of the Muru eco-friendly tool line business, based on the research carried out in Metropolitan Lima to the NSE "A" and "B" citizens. This investigation made it possible to detect that there is a segment of consumers who are looking to purchase eco-friendly tools, whether they are made from recycled materials or have a reduced impact on the environment, which consumers do not find easily because those are usually sold to corporate customers. In order to launch this project the next year (2020), it was attempted to analyze the industry in detail considering the key trends, market forces, macroeconomic forces, among others. In addition, in order to achieve a better and more structured planning, the company structure was developed, divided as follows: Marketing Plan, Financial Plan, Corporate Social Responsibility Plan, Human Resources Plan and the Operations Plan. Within each of the plans, the strategies, activities and resources that are needed for this project to be viable when in runs into operation are contemplated. Special emphasis was placed on the development of the Financial Plan so that its projections are as accurate as possible. As a result of the aforementioned, it was obtained that for the project to begin its operational phase an investment of 31,000 soles is needed. Also, after the investment, the projected net profits are 35,696.77; 93,400.48 and 136,959.96 soles for the first, second and third year respectively.
Trabajo de investigación
Smith, Nicole R. "Wangechi Mutu: Feminist Collage and the Cyborg." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/art_design_theses/51.
Full textCerna, Cédric. "MUNU : étude de la diffusion neutrino-électron." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10197.
Full textMäättä, P. (Pekka). "Leikki ja lasten muu toiminta päiväkotiympäristöjen suunnittelussa." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805311995.
Full textIn my Master’s Thesis my focus is on children’s play and other activities in daycare centre environments. My aim is to find out means of design how to better take into account children’s activities at daycare centre environments. The literary framework for my Thesis lies on studies concerning theory about early childhood education. Also, The Rules and Information File concerning Daycare environments of Finnish Building Information Group’s (RT) targeted for designers is one of my main sources. In addition, I will focus on architectural literature about children’s activity in environments. The themes pointed out in educational literature I will discuss through three architectural case studies. Further, I will present my design concepts demonstrating solutions supporting children’s spontaneous activities. In the literature, environments’ functionality and childrens activities are widely emphasized. Child’s worldview is mainly based on exploring the environment through actions. Therefore, creating the environment is more than just creating the physical environment, but it is about creating culture. Since, the emphasis in my Thesis is on actions and activities in children’s environments, I have left material studies and the overall spatial visuality to a smaller role. Hence, my aim is to focus on functionality and experiential aspects. The biggest single theme in my Thesis is childrens play, especially long lasting play. My aim is to find phenomena to foster play and further, to find design solutions for high quality children’s play environments through conceptual design proposals. Affordance is often referred concept, meaning cues inspiring the play and other children’s action offered by the environment. As a theme there also child’s selfdom supporting environment is emphasized, meaning that environment has to be personal or be personalized in some way. Similarly, youngsters have posters in their room, should also the little children be able to personalize their environments. Usually in Finland personalization has been made possible by placing pictures of children or their family nearby their own places like beds. According to my findings, personalization could be taken into consideration already in the architectural design phase and thereby, it could be genuine feature of the whole environment. Hence, children’s action would be seen as an opportunity, not a threat. Other important themes in my Diploma Thesis are ’using all the senses’, ’the impact of space orientation on childrens activity’, ’the impacts of the environment on the daycare centre’s hierarchy’ and ’children’s view’. Based on the aforementioned themes I have designed conceptual sketches to support play and other children’s activities in daycare centre environments. The focus is on design concepts for children’s actions and other activities in the daycare centre environments. In addition to design solutions for children’s independent moving plays, I will also offer proposals for design concepts concerning rest and relax
Chung, Ki Yong. "Metabolic and genetic regulation in adipose tissue of Angus and Wagyu steers raised to U.S. and Japanese endpoints." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/3909.
Full textKrutelyov, Vyacheslav. "Search for supersymmetry using rare B to mumu decays at CDF run II." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3347.
Full textSwami, Kara. "Destabilizing the Sign:The Collage Work of Ellen Gallagher, Wangechi Mutu, and Mickalene Thomas." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367942466.
Full textCui, Zhiying. "Denim Fiberboard Fabricated from MUF and pMDI Hybrid Resin System." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505281/.
Full textLamblin, Jacob. "Performances du détecteur MUNU et Perspectives en vue de la détection des Neutrinos Solaires." Phd thesis, Grenoble INPG, 2002. http://tel.archives-ouvertes.fr/tel-00001532.
Full textHang, Bao-Hien [Verfasser], and Ralf [Akademischer Betreuer] Junker. "Auswirkungen einer MUFA-reichen Diät auf das Hämostasesystem / Bao-Hien Hang. Betreuer: Ralf Junker." Münster : Universitäts- und Landesbibliothek der Westfälischen Wilhelms-Universität, 2011. http://d-nb.info/1017849307/34.
Full textMitchell, C. "A narrative inquiry of women's lives in Mugu, Nepal : identities, power relations and education." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.579756.
Full textWincrantz, Christian. "Finger-jointing of acetylated Scots pine using a conventional MUF resin." Thesis, KTH, Byggnadsmaterial, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240655.
Full textMagnusson, Angelica. "Syntes av nya MUF-limmer och analys av dessas härdning i limfog." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172977.
Full textI detta arbete har MUF-hartser syntetiserats med varierande melaminhalt, F/NH2 molkvot och satsningsförfarande av reaktanter under syntes. Vidare undersöktes det hur dessa syntesparametrar påverkar hartsernas egenskaper så som lagringsstabilitet och fri formaldehyd innehåll. Dessutom tillämpades NMR spektroskopi för att studera hartsernas kemiska struktur medan SEC och MALDITOF-MS analyser utfördes för att få en uppfattning om hartsernas molekylvikt samt molekylviktsfördelning. Vidare analyserades hartsernas härdningskinetik med Raman spektroskopi. Från de syntetiserade hartserna förbereddes härdade limfogar vars mekaniska egenskaper och vattenbeständighet studerades genom dragprovstestning efter olika förbehandlingar av fogarna. Från hartsernas kemiska struktur kunde det bekräftas att då syntes utfördes under både basiska och sura betingelser erhölls en högre mängd eterbryggor i hartserna i jämförelse med syntes under endast sura betingelser. Vidare konstaterades det att hartserna med högre melaminhalt samt hartset som tillverkades med färre ureasatsningar bestod av en högre mängd metylolgrupper och en mindre andel substituerade grupper på melamin och urea. Jämförelsevis resulterade en högre F/NH2 molkvot samt två formalinsatsningar under syntes i en större mängd substituerade grupper och i en högre andel större molekylstrukturer. Från den erhållna mängden fri formaldehyd i hartsen kunde det konstateras att en lång kondensationstid under basiska betingelser var det mest effektiva sättet att sänka detta värde. Jämförelsevis hade hartserna med hög F/NH2 molkvot det högsta innehållet av fri formaldehyd. Då hartsernas lagringstabilitet undersöktes visade det sig att en hög andel flexibla eterbryggor, en låg andel metylolgrupper, en låg melaminhalt, en hög F/NH2 molkvot och en hög andel grenade kedjor resulterade i förbättrad lagringsbeständighet. Från SEC-analysen erhölls hartsernas molekylvikter (Mn) i området 1000-1600 g/mol samt en bred molekylviktsfördelning. Resultaten var vidare bekräftade med MALDI-TOF-MS. Det observerades att hartserna med högre melaminhalt hade lägre molekylvikt samt att hartserna tillverkade med olika antal satsningar hade högst dispersitet. Då hartsernas härdningsförlopp studerades kunde det konstateras att ett högre bladningsförhållande av härdare/harts resulterade i en snabbare härdningsprocess samt i en större andel tvärbindningar i systemet. Dessutom visade det sig att reaktionen med metylolgrupper är mindre pH-beroende än omlagringen av eterbryggor och bildandet av metylenbryggor. De två sistnämda reaktionerna gynnas vid lägre pH. Då de kinetiska profilerna av hartserna jämfördes noterades det att hartset med en högre mängd eterbryggor och en lägre andel metylolgrupper hade en långsammare härdningsprocess. Från resultaten av de mekaniska analyserna på de härdade limfogarna kunde det konstateras att ingen signifikant skillnad i dragstyrka fanns mellan de olika fogarna då de testades i torrt tillstånd. Däremot observerades en minskad dragstyrka för hartset med högre melaminhalt då fogarna undersöktes i vått tillstånd. Detta visar på att den ökade melaminhalten som används i hartserna i detta projekt inte är tillräcklig för att resultera i en, med den använda metoden observerbar, förbättrad dragstyrka eller vattenbeständighet hos den motsvarande härdade limfogen.
Ward, John D. "Implementing the Defense Business Operations Fund, the case of the Naval Air Reserve at Point Mugu." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA278048.
Full textThesis advisor(s): R.D. Milligan ;Gregory G. Hildebrandt. "December 1993." Bibliography: p. 60-61. Also available online.
Muff, Stefanie [Verfasser]. "Die Rolle von Calcineurin und Nuclear Factor of Activated T cells in der kolorektalen Karzinogenese / Stefanie Muff." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1155760832/34.
Full textKaverén, Pär, Robert Nilsson, and Patrik Nilsson. "Poked av politiker : En studie om MUF och SSU:s politiska kommunikation på Facebook." Thesis, Jönköping University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1268.
Full textThe new media landscape is growing by the minute with blogs, web pages and different communities. The latest phenomenon that has grown rapidly throughout the world is Facebook. This is at new platform for communications where individuals can meet and socialise. Even political actors have started to appear on this community to work and spread their opinions. Several of the Swedish political parties are represented with different group, among them we have the two biggest political youth organisations: MUF (Young conservatives) and SSU(Young socialists).
This study examines how Facebook can be used as a tool to create opinion. The authors of this thesis have chosen to emphasise their study on the above mentioned political youth organisations SSU and MUF and how these two actors and there members chose to use this community as a communications tool.
This study is conducted by the use of qualitative interviews with representatives from the organisations and creators of the groups. The authors have also done an observation of the groups
The research shows that there are differences between the MUF and SSU both in the increase of members but also in activity.
The study shows that the involvement of the two organisations in their groups have no importance set in correlation to the amount of activity ad increase of members. Facebook is a good tool for creating opinion if used in the right way. Something that both SSU and MUF have great knowledge of, even though they use it differently.
Zanetti, Michela. "Technologies pour résines MUF de haute performance avec un taux faible de mélamine." Nancy 1, 2003. http://www.theses.fr/2003NAN10063.
Full textThe characteristics of aminoplastic resins for particleboard applications have been improved throught a number of technologies. It was explained how some molecules, such as hexamethylenetetramine, methylal and melamine acetate, improve the performances of the adhesives. New additives were also tested : para-toluene sulphonic/morpholine, acetals, The effect of additives onto physical, chemical and mechanical properties was investigated by thermomechanical analysis, nuclear magnetic resonance spectroscopy, low angle light laser scattering, polarized light optical microscopy and by manufacturing wood particleboards. It appears that the process used to synthesize melamine- urea-formaldehyde resins has some influence on the effect of additives on the behaviour of the resin. Some compounds as acetals increase melamine solubility and disrupt colloidal aggregations. Other compounds, as hexamethylenetetramine, have a buffering effect which allows to improve " hardening-degradation " equilibrium
Properzi, Milena. "Sviluppo e applicazioni di nuove resine melammina-urea-formaldeide (MUF) per del legno." Nancy 1, 2002. http://www.theses.fr/2002NAN10014.
Full textThis report concerns the research focused on the study of structural wood adhesives properties. The research was conducted on four levels namely; Formulation, synthesis and characterization of new MUF wood adhesives. Development of a new honeymoon MUF adhesive system for exterior grade glulam and finger-joints. Experimentation of new chemical additives able to improve the bonding properties of commercial adhesives. Bonding of high moisture content wood. Comparative performances of fast-setting single and separate application wood adhesives for structural glulam
Zhang, Muyu [Verfasser], Bernd [Akademischer Betreuer] Markert, and Rüdiger [Akademischer Betreuer] Schmidt. "Auto-correlation-function-based damage index for damage detection and system identification / Muyu Zhang ; Bernd Markert, Rüdiger Schmidt." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130327329/34.
Full textZapata, Julinho. "Los cerros sagrados: panorama del Periodo Formativo en la cuenca del Vilcanota, Cuzco." Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/113363.
Full textEste trabajo presenta nuevas evidencias del Periodo Formativo en la cuenca del río Vilcanota, a raíz de prospecciones y excavaciones dentro del Proyecto Arqueológico Huaro. La distribución de los sitios varía en el tiempo. En el Formativo Medio y Tardío se ubican en las zonas productoras de maíz y papas, sobre colinas y cerros que fueron transformados. Las excavaciones efectuadas en Batan Urqo y Muyu Urqo revelaron restos de patios hundidos como vestigios de un sistema ideológico religioso, en el cual los cerros sagrados fueron sus puntos de conexión, como parte de un mapa geográfico cognitivo. Estas nuevas evidencias descubiertas para la región del Cuzco indican contactos y relaciones estrechas con la región del Titicaca.
Mbungu, Mutu Joseph [Verfasser] [Mitwirkender]. "Ökologische Ethik und Das Prinzip Verantwortung : Ein Beitrag zur Aktualität der ethischen Theorie von Hans Jonas / Joseph Mbungu Mutu." Frankfurt : Peter Lang GmbH, Internationaler Verlag der Wissenschaften, 2012. http://d-nb.info/1042407002/34.
Full textMbungu, Mutu Joseph [Verfasser]. "Ökologische Ethik und Das Prinzip Verantwortung : Ein Beitrag zur Aktualität der ethischen Theorie von Hans Jonas / Joseph Mbungu Mutu." Frankfurt : Peter Lang GmbH, Internationaler Verlag der Wissenschaften, 2012. http://nbn-resolving.de/urn:nbn:de:101:1-2013093014252.
Full textZhou, Xiaojian. "Évolution des colles à panneaux bois extérieurs synthétiques (MUF), aux colles naturelles et soudage sans colles." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0035/document.
Full textIn this studied, wood based composites were assembled with the natural adhesive (tannin adhesive), the synthesis adhesive (MUF) and the welding wood without adhesive. These wood composites include particleboard, plywood and glulam. We focus on these works as follows: 1) Three different types of tannins (chestnut hydrolysable tannins, pine condensation tannins and mimosa condensation tannins) as thermosetting or cold-setting adhesive were studied to assemble particleboard, plywood and glulam for application to semi-exterior or exterior. 2) The characteristics of MUF resins for particleboard applications have been improved through a number of additives (nanoclay, hyperbranched polymer and glutaraldehyde), the powder adhesive of MUF was obtained by spray-drying technologies, and it could be prolonger the shelf-life of MUF adhesive. It also can be application to exterior after enhancing. 3) The blockboard for application exterior was assembling by welded dowels, two differents materials (sun flower oil and acetylated lignin) were used to improve the water resistance. These physical, chemical and mechanical properties of these assemblages was investigated by implementing some techniques such as thermomechanical analysis (TMA), X-ray diffraction (XRD), nuclear magnetic resonance (13C NMR), matrix-assisted laser desorption/ionization mass spectroscometry (MALDI-TOF), and by manufacturing wood composites. Finally, the performances of these wood composites were apparent improved whether with the tannin adhesive, the MUF adhesive or the welding wood without adhesive, especially improved the water resistance of wood composites for exterior applications
Cao, Xiaojuan. "Effect of consuming ground beef of differing monounsaturated fatty acid content on atherosclerotic cardiovascular disease risk factors in healthy men." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3211.
Full textCoursey, Andrew Richard. "ALTERNATIVE FEEDING STRATEGIES TO MAXIMIZE MARINE FEEDSTUFF REPLACEMENT IN LARGEMOUTH BASS Micropterus salmoides CULTURE WHILE MAINTAINING PRODUCTION PERFORMANCE." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/648.
Full textMaandi, Peeter. "Change and persistence in a reformed landscape : a geographical analysis of land reforms and landscape change in Muhu and Rapla municipalities, Estonia, c. 1840 to 2003 /." Uppsala : Department of Social and Economic Geography, Uppsala University, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5841.
Full textChu, Hyun Sik Stephano. "Long Chain n-3 PUFA and Oleic Acid Modification Strategies to Enhance Fillet Quality in Tilapia, Oreochromis species." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/85868.
Full textPh. D.
Silva, Lilian de Almeida. "Museu e turismo : instrumentos de negociação de cidadania? : estudo de caso do Museu de Favela - MUF/Rio de Janeiro." Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/10206.
Full textMade available in DSpace on 2015-03-03T19:13:53Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Lilian Silva para biblioteca.pdf: 2567466 bytes, checksum: b456cbf8423734ca05d5b468a61353d9 (MD5) Previous issue date: 2012-03-16
Esse trabalho propõe uma discussão sobre o papel dos museus e da atividade turística como instrumentos de inclusão social de grupos até então marginalizados dos processos de representação, reconhecimento e reivindicação de seus “direitos culturais”. A partir da construção e uso do conceito de “cidadania cultural” nas Políticas Públicas de Cultura no Brasil, e da análise das atividades desenvolvidas pelo MUF – Museu de Favela junto à população dos morros do Cantagalo-Pavão-Pavãozinho na cidade do Rio de Janeiro, este trabalho oferece alguns dados à discussão sobre os processos de musealização de memórias periféricas e inserção de localidades tidas como marginais aos roteiros de turismo. Transformando-se, efetivamente, em arenas de negociação de cidadania e direitos culturais, entendidos como espaços de direitos à participação, informação, fruição, reconhecimento, produção e visibilidade cultural
Brooks, Matthew Alan. "Carcass characteristics, fatty acids, stearoyl-coa desaturase gene expression and sensory evaluation of calf-fed and yearling-fed angus steers." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2562.
Full textCasaus, Kevin Ricardo 1969. "Use of GIS for natural and cultural resource management: A computerized rule-based activity planning system on San Nicolas Island, Point Mugu Naval Air Weapons Station." Thesis, The University of Arizona, 1998. http://hdl.handle.net/10150/278674.
Full textSjösvärd, Nathalie, and Julia Björkdahl. "Community Resilience and the Vulnerability to Climate Change in the Republic of Fiji : A qualitative field study on Mudu Village’s ability to recover from natural disasters." Thesis, Linnéuniversitetet, Institutionen för samhällsstudier (SS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-75687.
Full textXu, Da. "Reconstruction and applications of QED final state radiation photons in Z->mumu decays produced in 7 TeV proton-proton collisions at the Large Hadron Collider." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/2265/.
Full textChui, Ka Ki. "Secularity and religion : Dietrich Bonhoeffer's later theology and its relevance for Bishop Ting Kuang-hsun's theological construction." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/886.
Full textBON, NGUYEN ROMUALD. "Etude de la diffusion Ve-e auprès de la tranche 5 du centre de production nucléaire du Bugey : simulation de l'expérience MUNU de mesure du moment magnétique du neutrino." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10173.
Full textMultasuo, M. (Mikael). "”Ei auta muu kuin opetella, ja kuunnella enemmän, kyllä se siitä”:gymnasieelevers och -lärares åsikter om de största problemen med svenskinlärning och svenska språkets fritidsanvändning." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201606142501.
Full textKgwatalala, Patrick M. 1973. "Genetic polymorphisms in the stearoyl-CoA desaturase1 (SCD1) gene and their influence on the conjugated linoleic acid (CLA) and monounsaturated fatty acids (MUFA) content of milk fat of Canadian Holstein and Jersey cows." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115690.
Full textSequence analysis of the 5' and 3' UTRs revealed no SNPs in the 5'UTR and a total of 14 SNPs in the 3'UTR of both breeds. The SNPs were in complete linkage disequilibrium resulting in 3 haplotypes or regulatory variants: H1 (G1571G1644C1763C2053A2584 A3007C3107G3208 T3290G 3497G3682A4399C4533G4881), H2 (G1571G1644A1763C2053A 2584G3007 C3107G3208T3290G3497G 3682A4399C4533G4881) and H3 (T 1571C1644A1763 T2053G2584G3007T 3107A3208C3290A3497A3682T 4399T4533A4881) in Holsteins and only H1 and H3 variants in Jerseys. A subsequent association study involving 862 Holstein cows, found the H1 regulatory variant to be associated with higher C10 and C12 desaturase indices and consequently with higher concentrations of C10:1 and C12:1 compared with the H3 variant. The effects of the H2 variant were intermediate to those of H1 and H3. 3'UTR genotype had no influence on the concentrations of C14:1, C16:1, C18:1 and CLA. The concentrations of C10:1 and C12:1 in milk fat could therefore be due to effects of SNPs in the open reading frame and the 3'UTR regions of the SCD1 gene. These results indicate that SNPs in the coding and 3'UTR regions of the SCD1 gene could be used as markers for genetic selection for increased C10:1 and C12:1 contents of milk.
Badkook, Maha Mohammed. "Effect of a high-MUFA diet alone or with combined vitamin E and C, or lycopene on the oxidative status, glycaemic control and lipid profiles in type II diabetics living in Saudia Arabia." Thesis, Manchester Metropolitan University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438740.
Full textMaccolini, Serena. "Ricerca di una risonanza ad alta massa nello stato finale mu+mu- a sqrt(s)=13 TeV con il rivelatore CMS." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9415/.
Full textGómez, Rubio Constanza Alejandra. "Vejez y cuidados, eso que les pasa a otros(as). Discursos y experiencias comunitarias autogestionadas en personas mayores de Santiago de Chile." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667224.
Full textThis thesis is questioned by poor old age and his care in Santiago de Chile. In particular, it seeks to know and understand old age and its care that builds women and men who participate in self-managed community organizations of poor older adults in the capital city of the country. I approach from feminist gerontology, postcolonialism and elements of anarchism by Piotr Kropotkin, always considering the intersections of gender, class and age critically, through the visibility of different speeches and ideologies of the base. The writing is a journey that began with the question how do you build old age and mutual care in two self-managed community organizations of poor older adults, inserted in a neoliberal context?, however, in the course of the Research were emerging other questions that opened the thesis to issues of great importance to respond to the first: How have older people survive in non-hegemonic social conditions?; What role does mutual support play in the strategies the livelihood of older people in poor communities; How are the forms of politicity in old age built from mutual care and community self-management? To answer these and other questions initially I began by describing the chilean neoliberal context, to locate the reader in the general framework of the research. Then I realize my position as author, both personally and professionally, which leads me to take a series of ethical-theoretical-political decisions regarding the study. These decisions begin to be glimpsed in the literature selected and presented from a critical perspective. Concordant with the foregoing, theoretically and methodologically, I used critical discourse analysis, with special emphasis on a feminist perspective, which I complemented with field notes from ground work I did in two phases. In the first one, I worked with a more Christian self-managed cutting organization, while in the second I did it with another self-managed organization of a more secular character, but that is not why its less-believing participants. I developed qualitative interviews open semidirective to a total of 22 elderly people, five men and 17 women, who also shared the history of the Constitution of the neighborhood for more than 50 years. From the critical analysis of the discourse and the field notes, three argumentative dimensions were produced: 1. Discursive constructions on old age: "They are the most helpless, with children too"; 2. Care: From sacrifice and colonialism to mutual help; 3. Self-management in community organizations and the relationship with care networks in old age: "... they were going to handle our money, so we said no." These dimensions allowed the hierarchical discourse and visualize of the operating ideologies, such as the heteropatriarcal, while making it possible to highlight the political importance of older women in their care through mutual aid, solidarity and Reciprocity that they have built among them, showing that community care is a potent alternative to the state, the market and the family.
C?sar, Nayara Rayne. "Efeitos da substitui??o parcial da banha de porco por ?leo de pequi (Caryocar brasiliense) em uma dieta ocidental sobre o metabolismo, a fun??o card?aca e o estado redox celular de ratos." UFVJM, 2015. http://acervo.ufvjm.edu.br/jspui/handle/1/794.
Full textApproved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-01-04T16:31:46Z (GMT) No. of bitstreams: 2 nayara_rayane_cesar.pdf: 2602002 bytes, checksum: c844463923756f76132f0190a6617bd5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Made available in DSpace on 2016-01-04T16:31:46Z (GMT). No. of bitstreams: 2 nayara_rayane_cesar.pdf: 2602002 bytes, checksum: c844463923756f76132f0190a6617bd5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015
Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)
Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq)
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes)
O padr?o diet?tico ocidental, caracterizado pelo alto consumo de gordura saturada e carboidratos refinados, favorece o ac?mulo de tecido adiposo e o surgimento de v?rias doen?as cardiometab?licas (DCM). Atualmente, tem-se considerado que n?o apenas a quantidade, mas o perfil das gorduras ingeridas pode exercer forte influ?ncia sobre o desenvolvimento dessas doen?as. Nesse contexto, v?rios estudos t?m demonstrado que o consumo de alimentos fontes de ?cidos graxos monoinsaturados (MUFA) est? associado a um menor risco para o desenvolvimento de DCM. Al?m disso, t?m sido tamb?m identificados muitos compostos bioativos presentes nos alimentos vegetais, os quais t?m sido associados a efeitos ben?ficos na redu??o do risco e, ou, no tratamento de DCM. Dentre esses compostos est?o os carotenoides, que apresentam atividade antioxidante. Nessa perspectiva, o ?leo do pequi apresenta-se como um potencial alimento funcional, dado que os MUFA representam aproximadamente 60% dos seus ?cidos graxos, e possui ainda um teor elevado de carotenoides totais. Considerando que o padr?o de consumo alimentar ocidental favorece o desenvolvimento das DCM, e que o ?leo do pequi ? um potencial alimento protetor, mas ainda n?o foi explorado nesse contexto, o objetivo deste estudo foi avaliar os efeitos da substitui??o parcial da banha de porco (rica em ?cidos graxos saturados - SFA) por ?leo de Caryocar brasiliense ? pequi (rico em MUFA e carotenoides) em uma dieta de padr?o ocidental, sobre o metabolismo, a fun??o card?aca e o estado redox celular de ratos. Ap?s uma semana de adapta??o, os animais rec?m-desmamados foram distribu?dos em tr?s grupos (n=12) e tratados durante 12 semanas. Os grupos foram identificados conforme a dieta que receberam: CTRL ? controle, dieta AIN93G; HFS ? dieta alta em gordura e sacarose; HFS-OP ? dieta alta em gordura e sacarose, com substitui??o parcial da banha de porco por ?leo de pequi (27%). O peso corporal e a ingest?o alimentar foram monitorados durante todo o per?odo experimental; a press?o arterial sist?lica (PAS) e a frequ?ncia card?aca (FC) foram aferidas na 3? e 10? semanas; as fezes das ?ltimas 72 horas foram coletadas para avalia??o das concentra??es de colesterol e triglicer?deos (TG) e, ao final do experimento, os animais foram eutanasiados por decapita??o. As cavidades abdominais e tor?cicas foram abertas para coleta de amostras: (A) cora??es: foram retirados imediatamente para avalia??o da fun??o card?aca ex vivo; posteriormente foram avaliados os n?veis de peroxida??o lip?dica e capacidade antioxidante total; (B): tecido adiposo das regi?es epididimal e retroperitoneal, que foi pesado e posteriormente utilizado para avalia??es da adiposidade e histol?gicas; (C) soro: para determina??o das concentra??es de glicose, colesterol e TG; (D) plasma: para determina??o das concentra??es de insulina, leptina e adiponectina, peroxida??o lip?dica e capacidade antioxidante total; (E) f?gados: para avalia??o das concentra??es de colesterol e TG, an?lises histopatol?gicas e peroxida??o lip?dica, capacidade antioxidante total e atividade enzim?tica (super?xido dismutase, catalase e glutationa peroxidase). Observou-se que os pesos corporais dos animais HFS-OP e HFS foram mais elevados que CTRL (p<0,05), no entanto, a deposi??o de gordura na regi?o visceral em resposta ao consumo das dietas ocidentais foi atenuada pela substitui??o da banha de porco por ?leo de pequi (p<0,05). A menor sobrecarga reduziu a deposi??o de TG no tecido hep?tico o que pode estar associado ao retardo do desenvolvimento do diabetes. De um modo geral, a fun??o card?aca foi prejudicada pelas dietas ocidentais em compara??o ao CTRL. Nas avalia??es in vivo n?o foram observados efeitos diferenciais da substitui??o parcial da banha de porco por ?leo de pequi, contudo, quando a fun??o card?aca foi avaliada ex vivo, a ingest?o do ?leo atenuou os danos ? fun??o card?aca (p<0,05), sugerindo que, ainda que modestamente, o ?leo do pequi exerceu um efeito protetor sobre as estruturas card?acas intr?nsecas. Al?m disso, foi observada uma atenua??o da peroxida??o lip?dica no tecido hep?tico para HFS-OP em rela??o ? HFS (p<0,05), sugerindo que o ?leo do pequi pode ter favorecido a incorpora??o dos MUFA e de carotenoides nas membranas dos cardiomi?citos, o que exerceu um efeito protetor. Devido ao papel prim?rio do f?gado no controle metab?lico de todo o organismo, esse efeito de prote??o contra a peroxida??o lip?dica n?o p?de ser observado nos hepat?citos. Contudo, a presen?a dos carotenoides na dieta HFS-OP fortaleceu o sistema antioxidante ex?geno, evitando que a atividade das enzimas super?xido dismutase e glutationa peroxidase fosse prejudicada em HFS-OP como observado para HFS (p<0,05). Essas adapta??es sugerem que a substitui??o parcial da banha de porco por ?leo de pequi foi capaz de atenuar alguns efeitos delet?rios da dieta ocidental sobre o metabolismo lip?dico, a fun??o card?aca e o estado redox celular de ratos.
Disserta??o (Mestrado) ? Programa Multic?ntrico de P?s-gradua??o em Ci?ncias Fisiol?gicas, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2015.
ABSTRACT The Western diet pattern, which means a high saturated fat and refined carbohydrates intake, leads to body fat accumulation and several cardiometabolic diseases (CMD). Currently, it has been considered that, not only the amount, but the fat quality, can exert a strong influence in the development of those diseases. In this context, several studies have shown that consuming foods high in monounsaturated fatty acids (MUFA) is associated with lower risk for CMD. Moreover, it has also been identified many bioactive compounds in plant foods which are associated with beneficial effects in reducing the risk, or treating DCM. Among these compounds are carotenoids, which have strong antioxidant activity. In this perspective, pequi oil is a potential functional food, since MUFA represent approximately 60% of its fatty acids content, and it is also high in several antioxidant carotenoids. So, considering that western diet pattern promotes CMD development, and pequi oil is a potential functional food, but it has not been explored in this context, the aim of this study was to evaluate the effects of a partial replacement of lard (high in SFA) by pequi oil (high in MUFA and carotenoids), into a Western diet model, on metabolism, cardiac function and cellular redox status of rats. The animals were divided into three groups (n = 12) and treated during 12 weeks: CTRL - control, AIN93G diet; HFS ? high in saturated fat and sucrose; HFS-OP - high in saturated fat and sucrose, with partial replcement of lard by pequi oil (27%). Body weight and food intake were monitored throughout the experimental period; systolic blood pressure (SBP) and heart rate (HR) were measured at the 3rd and 10th weeks; faeces from the last 72 hours were collected for evaluation of cholesterol and triglycerides (TG). At the end of the experiment, all animals were killed by decapitation, the abdominal and thoracic cavities were opened for collection of samples: (A) hearts were taken immediately to evaluate the ex vivo cardiac function; levels of lipid peroxidation and total antioxidant capacity; (B): epididymal and retroperitoneal adipose tissues were harversted, weighed and subsequently used for adiposity and histological evaluations; (C) serum: for glucose, cholesterol and TG determination; (D) plasma: for insulin, leptin and adiponectina determinations, lipid peroxidation, total antioxidant capacity; (E) livers: for cholesterol and TG levels, histopathological analyzes, lipid peroxidation, total antioxidant capacity and enzyme activities. Body weights from HFS-OP and HFS animals were equally higher than CTRL (p<0.05); however, visceral fat deposition in response to consumption of the Western diet was attenuated by replacing lard by pequi oil and it also led to less TG deposition in the liver (p<0.05). In general, cardiac function was impaired by Western diet, promoting a higher blood pressure and heart rate in vivo and a lower cardiac contractility and relaxation efficiency ex vivo (p<0,05). However, although there were no differential effects from the partial replacement of lard by pequi oil on blood pressure and heart rate in vivo, this replacement attenuated the damage to cardiac function compared to HFS (p<0.05), suggesting that, eventhough modestly, pequi oil exerted a protective effect on intrinsic cardiac structures. In addition, the partial replacement of lard by pequi oil reduced lipid peroxidation in cardiomyocytes (p<0.05) compared to HFS, which was not observed in hepatocytes. Moreover, in the hepatocytes, there were an increasing in total antioxidant capacity and catalase and glutathione peroxidase activities compared to HFS (p<0.05). These adaptations suggest that the partial replacement of lard by pequi oil mitigated some deleterious effects of the Western diet on lipid metabolism, cardiac function and cellular redox status of rats.
Öhnström, Magnus, and Victor Göhlin. "Förbättring av passivdämpande hörselskydd." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-14381.
Full textMagnus Öhnström and Victor Göhlin are two design engineer students from the University of Skövde. To obtain their bachelor in engineering they have completed a study for Hellberg Safety to improve the sound dampening effect in their passive earmuffs. The goal is a standard shell that can be optimized for different grades of sound dampening. In order to obtain knowledge a pilot study was performed. This included an analysis of one of the major competitor’s products. In order to reach the goal, the shell, absorber and cushion had to be examined. Modifications made were evaluated with an Acoustic Test Fixture (ATF) located in Hellbergs sound lab. Different modifications were combined, evaluated and sent to Germany for further evaluation. From the given results parts of the shell were further developed.
Arslan, Omer Cagri. "Implementation And Performance Evaluation Of A Three Antenna Direction Finding System." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611215/index.pdf.
Full textEskilson, Siri, and Kajsa Pedersen. "Red banderoles and swedish flags - a study in the relationship between politics and visual identity within ten political youth associations." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-115732.
Full textEdin, Strukan. "Efekti liderstva na organizacione i poslovne performanse preduzeća." Phd thesis, Univerzitet u Novom Sadu, Tehnički fakultet Mihajlo Pupin u Zrenjaninu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=108162&source=NDLTD&language=en.
Full textThe dissertation deals with the effects of leadership, LMX and transformational leadership on the various organisational and business performance of enterprises in Bosnia and Herzegovina. Of business performance, key financial and success of new product development performance are considered to be key, while as organisational performance we consider: job satisfaction, organisational commitment, organisational communication and mutual trust at work. In addition, the dissertation also explains other organisational outcomes that are in a cause-and-effect relationship with leadership: organisational behaviour, organisational culture, motivation and stress. The research part of the dissertation is based on data obtained from two simultaneously conducted research. The first survey included a survey of N = 334 mid-level managers from 103 enterprises in Bosnia and Herzegovina. The statistical methods used are: descriptive statistics, correlation analysis, regression analysis and hierarchical regression analysis for moderate effect testing. The basic conclusions of this research are: (1) Leaders in Bosnia and Herzegovina have high expectations in terms of performance, with little support and feelings for employees. The penalties are more frequent than the rewards, the LMX is around the average, the distance of power above the average, and the organisation's commitment has a low average grade. (2) Employees in Bosnia and Herzegovina do not like a great distance of power, preferring good interpersonal relationships, both with their superiors and their counterparts. In addition, employees highly value and reward strategic abilities of leaders. Insistence of leaders on high-performance, as well as the application of the punishment system, do not yield positive effects. (3) Job satisfaction, satisfaction with organisational communication and mutual trust in work are around the average. Employees are more satisfied with aspects of work related to social relations in the companythan the existing and potential benefits. Generally speaking, they are happy with organisational communication, especially with middle-level managers, and mutual trust is more intense when it comes to the intentions and actions of colleagues than the intentions and actions of enterprise management. (4) Ownership structure and national origin of enterprises are not significant moderators of observed relationships. The moderate effect has only been demonstrated in a small number of cases. (5) Leaders should reduce the distance of power, reduce high performance expectations, reduce punishment, improve their relationship with employees, nurture good relations among employees, increase rewards, and improve their strategic knowledge, thinking and action.Also, in order for the dissertation to provide comprehensive information on the effects of leadership on organisational and business performance of enterprises in Bosnia and Herzegovina, in addition to the aforementioned research of mid-level managers, an additional parallel study was carried out on a sample of 127 top managers in the same companies, on the principle of one company one top manager. Bearing in mind the fact that modern business imposes on leaders the need to create and permanently introduce changes to existing business practises, which in essence represents transformational leadership, this research was intended to determine the scope and intensity of the transformation leadership effects of top managers on business performance of enterprises in Bosnia and Herzegovina. We consider financial performance and performance of new product development as business performance. The results of this research show that transformational leadership has a positive influence on achieving a high level of financial performance and the performance of developing a new product. Also, research has shown that leaders and top managers of the highest level in enterprises in Bosnia and Herzegovina have a greater focus on tasks than on people. In this regard, the recommendation to them is to pay more attention to the design and implementation of changes in the existing business model, the future and long-term plans, but also to its employees as the main carriers of all business processes.
Konstantinidou, Valentini. "Molecular mechanisms involved in the protective effect of Mediterranean diet and olive oil consumption in humans." Doctoral thesis, Universitat Pompeu Fabra, 2010. http://hdl.handle.net/10803/7208.
Full textEl objetivo de este estudio es investigar si el papel protector de la dieta Mediterránea tradicional (TMD) y del aceite de oliva virgen (VOO), rico en compuestos fenólicos (PC), puede ser mediado a través de cambios en la expresión génica. Se realizaron dos ensayos clínicos para evaluar los efectos nutrigenómicos de la TMD y del VOO, in vivo, en voluntarios sanos. Los resultados mostraron a) cambios en la expresión génica de genes relacionados con el riesgo cardiovascular tras la ingestión del aceite virgen de oliva, b) una infra-expresión en la expresión de genes relacionados con el proceso aterosclerótico tras una intervención con TMD de 3 meses y c) que los compuestos fenólicos del aceite de oliva ejercen un efecto nutrigenómico protector en el marco de la TMD. Los cambios en la expresión génica fueron coherentes.
Halvarsson, Sören. "Manufacture of straw MDF and fibreboards." Doctoral thesis, Mittuniversitetet, Institutionen för naturvetenskap, teknik och matematik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-11732.
Full textSyftet med denna avhandling var att lägga grunden för en ekonomisk, hållbar och miljövänlig MDF process för halmråvara, kapabel för fullskalig produktion av MDF och goda skivegenskaper. Framställningen av MDF skivor utgick från halm av vete (Triticum aestivum L.) och ris (Oryzae sativa L.). Tre olika metoder användes för att producera MDF av halm; (A) fibrer av vetehalm belimmades i blåsledning med ett melaminmodifierat urea-formaldehydlim (MUF), (B) fibrer av rishalm belimmades i en limblandare med metylen difenyl diisocyanate (MDI), (C) Limfria MDF skivor av vetehalm framställdes med aktivering av fibrer genom tillsats av Fenton´s reagens (H2O2/Fe2+) i blåsledning utan någon tillsats av syntetiskt lim. Sammanfattningsvis kan det understrykas att framställda MDF-skivor av MUF/vetehalm var godkända enligt standard för MDF (EN 622-5, 2006). Dessutom var framställda MDF skivor av MDI/rishalm också godkända enligt krav i standard för MDF ”American National Standard Institute” (ANSI A2008.2-2002). Limfria vetehalmskivor visade på måttliga skivegenskaper och klarade inte kraven i MDF standard. Fiberframställningsprocessen för MDF modifierades till en produktion utgående från halm. MDF processen för halm delades upp i sju primära processoperationer. (1) Storleksreducering och sållning av halm (2) Vätning och uppvärmning av halm (3) Defibrering (4) Belimning av halmfiber (5) Mattformning (6) Förpressning (7) Pressning De viktigaste resultaten från denna studie är att MDF av halm kunde produceras utgående från olika typer av halmsorter och lim. Dessutom utfördes MDF-processen i pilotskala och visade på en lämplig metod för framställning av MDF-skivor från halmbalar till färdiga halmfiberskivor. Det miljömässiga perspektivet på att använda jordbruksavfall till framställning av halmskivor är att undvika förbränning av halm ute på fältet, men det är även möjligt att binda koldioxid (CO2) i halmskivor under längre tid än att omsätta halmråvaran omedelbart som bioenergi eller använda halmfiber som returpapper några få gånger. Dessutom kan MDF återanvändas eller bli omsatt till energi efter användning. Ett förhållande mellan ”water retention value” (WRV), av belimmade halmfiber, tjocklekssvällning för motsvarande MDF av halmskivor och mängden av tillsatt lim vid olika nivåer har undersökts. Med ökande limhalt tilltog WRV fibersvällning, vidare minskade tjocklekssvällning för motsvarande MDF skivor. De framtagna empiriska modellerna var godtagbara och beräknade R2 värden var 0.69 (WRV) och 0.75 (TS). Minskad tjocklekssvällning med ökad limhalt är dokumenterad sen tidigare. Ökad fibersvällning WRV vid tillsats av polymerer (limmer) är inte fullständigt etablerad inom vetenskapen för fibersvällning. Lyckligtvis kan grundläggande forskning initieras och sannolikt föreligger en enkel metod för att prediktera tjocklekssvällning av MDF genom analyser av torkade och belimmad MDF fiber.
Silva, Gilmar Alves. "Anomalia equatorial de ionização e a propagação de sinais de rádio." Universidade Presbiteriana Mackenzie, 2018. http://tede.mackenzie.br/jspui/handle/tede/3499.
Full textApproved for entry into archive by Paola Damato (repositorio@mackenzie.br) on 2018-04-04T11:49:28Z (GMT) No. of bitstreams: 2 Gilmar Alves Silva.pdf: 7136878 bytes, checksum: 1d18b7604ed4a6ba52324bc984698f1a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Made available in DSpace on 2018-04-04T11:49:28Z (GMT). No. of bitstreams: 2 Gilmar Alves Silva.pdf: 7136878 bytes, checksum: 1d18b7604ed4a6ba52324bc984698f1a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-01-31
The ionosphere plays an important role in the propagation of electromagnetic waves, providing valvable opportunity to study its variability and effects on radio signals. The continuous changing in the ionospheric conditions caused by space weather strongly affects the propagation of electromagnetic waves, particularly in high frequency (HF).This work aims to investigate the propagation of radio signals in the equatorial region, between November 2013 to October 2014 in the following frequencies: 1,8 MHz, 14 MHz, 28 MHz and 50 MHz. The study was performed using DPS4 digisonde data, propagation model (VOACAP) and amateur radio receivers. The work consists of radio signals analysis emitted by two amateur radio stations located in Punta Arenas (latitude: 53.15°S; longitude: 70.92°W; dip. latitude: 39.37ºS) and in Nairóbi (latitude: 1.28ºS; longitude: 36.88ºE; dip. latitude: 10.74ºS). These radio signals were recorded at the amateur radio receiving stations located in Boa Vista (latitude: 2.82°N; longitude: 60.76°W; dip. latitude: 15,14ºN), Campo Grande (latitude: 20.5oS; longitude: 54.7oW; dip. latitude: 16.99ºS) and São Luís (latitude: 2.53oS; longitude: 44.30oW; dip. latitude: 3.28ºS) located in the region of the equatorial ionization anomaly (EIA) and at the magnetic equator in the Brazilian sector. It was emphasized the analysis of the maximum usable frequency (MUF) obtained from the foF2 ionospheric parameter and the signal-to-noise ratio (SNR) in each path between radio amateur transmitters (Tx) and the receivers (Rx). Results indicate that the ionosphere response was different in relation to the radio signals that propagate in and out of the equatorial region. According to SNR values measured at the receiving stations, The communications in 1.8 MHz were only possible at evenings of winter months between Punta Arenas and Boa Vista and between Punta Arenas an Sao Luis. The communications in 14 MHz were possible on all routes during the summer months and during equinoxes period at any hour of the day, but during the winter period the transmissions from Punta Arenas were only received in São Luís and Campo Grande during daylight hours. The 28 MHz transmissions from Nairobi were received during the summer months in all stations 24 hours by day, but transmissions at the same frequency from Punta Arenas only were received in São Luís and Campo Grande. At other times of the year the communications over the same frequency were only possible during daylight hours. The communications in 50 MHz were only possible in the summer months coming from Nairobi station.
A ionosfera desempenha um papel importante na propagação de ondas eletromagnéticas, o que proporciona uma oportunidade para estudar sua variabilidade e seus efeitos sobre os sinais de rádio. A mudança contínua nas condições ionosféricas causadas pelo clima espacial afeta fortemente a propagação principalmente em alta frequência (HF), em virtude disso esse trabalho apresenta resultados de investigação sobre a propagação de sinais de rádio realizado durante um ano, entre novembro de 2013 a outubro de 2014 nas frequências 1,8 MHz, 14 MHz, 28 MHz e 50 MHz na região equatorial. O estudo foi realizado usando dados de digissonda, modelo de propagação (VOACAP) e receptores de rádio amador. O trabalho consiste na análise de sinais de rádio emitidos por duas estações transmissoras de rádio amador localizadas em Punta Arenas (53,15°S; 70,92°W; dip. latitude: 39,37ºS) e em Nairóbi (1,28ºS; 36,88ºE; dip. latitude: 10,74ºS), sendo esses sinais de rádio registrados nas estações receptoras de rádio amador localizadas em Boa Vista (2,82°N; 60,76°W; dip. latitude: 15,14ºN), Campo Grande (20,5oS; 54,7oW; dip. latitude: 16,99ºS) e São Luís (2,53oS; 44,30oW; dip. latitude: 3,28ºS), isto é, na região da anomalia equatorial de ionização (EIA) e no equador magnético no setor brasileiro. O estudo enfatizou a análise do parâmetro ionosférico denominado máxima frequência utilizável (MUF), bem como a relação sinal-ruído (SNR) em cada trajeto entre transmissor (Tx) e receptor (Rx). Os resultados indicam que a resposta da ionosfera foi diferente em relação aos sinais de rádio que se propagam dentro e fora da região equatorial. De acordo com valores da SNR medidos nas estações receptoras, as intensidades dos sinais de rádio nas frequências especificadas variam no período de 24 horas. As comunicações em 1,8 MHz só foram possíveis nos enlaces entre Punta Arenas e Boa Vista e São Luís durante os meses de inverno no período da noite. As comunicações em 14 MHz foram possíveis em todos os trajetos durante 24 horas nos meses de verão e nos equinócios, mas no período de inverno as transmissões de Punta Arenas só foram recebidas em São Luís e Campo Grande durante as horas do dia. As transmissões em 28 MHz de Nairóbi foram recebidas durante 24 horas nos meses de verão em todas as estações, as de Punta Arenas só em São Luís e Campo Grande. Nos demais períodos do ano as comunicações só foram possíveis durante as horas do dia. As comunicações em 50 MHz só foram possíveis nos meses de verão e apenas com a estação de Nairóbi.