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Screening of ten maize genotypes for tolerance to acid soils using various methodsPeterson, Mkafula Thembalethu 11 1900 (has links)
Breeding maize (Zea mays L.) for tolerance to acidic soils could improve maize yields. The current study aims to identify maize genotypes with tolerance to acidic soils, as well as identifying secondary traits associated with the tolerance to soil acidity. Ten maize varieties were screened for tolerance to aluminium (Al) toxicity under glasshouse, laboratory and field conditions. In the glasshouse, two soil acidity levels (limed and unlimed soil) were used and the experiment was set up in a complete randomised design (CRD) with three replications. The experiment lasted for 10 days and measurements were taken on plant height (PH), leaf area, stem diameter and dry matter. In the laboratory, a haematoxylin staining (HS) experiment was conducted to determine the response of 10 maize varieties to Al toxicity. Two Al concentrations (0 and 222 μM) were used and the experiment was set up in a completely randomized design with three replications. After 7 days, shoot length, was recorded. Five stress tolerance indices were estimated to determine the resilience of each genotype. A root growth stress tolerance index was also computed for both experimental procedures. In the field, two trials were established at two sites, namely Mbinja and Mpumaze. Limed and unlimed plots were used, and the trial was set up in a randomized complete block design with three replications. Maize kernel yield and other standard field parameters were recorded. Selection of tolerant genotypes from the field screening was also done using three indices, namely harmonic mean (HM), stress tolerance index (STI) and stress susceptibility index (SSI).
Both the glasshouse and laboratory assays identified similar genotypes of maize as being tolerant. These tolerant genotypes were Ngoyi, PANBG3492 BT, PAN 6Q408 and PHB 3442 based on the root growth stress tolerance index (RGSTI). It was therefore demonstrated that these two assays produced the same level of efficiency in identifying tolerant genotypes using this index. Based on ranking of seedling vigour index under soil acidity stress, the top three genotypes at Mpumaze were PHB32W71, PAN6616 and Sahara while at Mbinja, the top three were PAN6616, PAN6Q408 CB and PAN6P110. The genotypes PANBG3492 BT, PAN6Q408 and PHB3442 were also found to be tolerant to acidic soils at seedling stage. These genotypes are recommended for further evaluation in more sites to confirm their tolerance and yield potential under acidic soils.
The study also revealed that plant height, leaf area and stem diameter could be used for indirect selection for tolerance to Al toxicity under glasshouse conditions. The seedling vigour index was also effective in identifying tolerant genotypes under glasshouse conditions. On the other hand, shoot length stress tolerance index and the haematoxylin score were useful for indirect selection for tolerance to Al toxicity in the laboratory. In the field, it was observed that ear length, leaf area and ear diameter can be useful in identifying genotypes that are tolerant to soil acidity. They can therefore be useful as indirect selection criteria under field conditions. Additionally, the best selection indices for identifying soil acidity tolerant genotypes under field conditions were the HM and the STI. It is recommended that varieties that were identified as tolerant be further evaluated in several soil acidity hot spots to confirm their tolerance and stability of performance under field conditions. / Agriculture and Animal Health / M. Sc. (Agriculture)
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Noise Function Turbulence Optical Phase Screens and Physics Based RenderingRiley, Joseph T. January 2021 (has links)
No description available.
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Frilansmusikers attityder till notläsning på surfplattorWiberg, Felix, Johansson, Johan January 2023 (has links)
Notskrift används för att dokumentera, kommunicera och läsa musik. Notskrift har traditionellt lästs från papper, men med ny teknik tillgänglig har fysiska papper till viss del bytts ut mot digitala enheter, såsom surfplattor. Fördelar med notläsning på surfplattor kan vara portabilitet, snabb åtkomst, och möjlighet för smidig bladvändning. Möjliga nackdelar kan vara svårigheter att annotera och liten skärmstorlek. Tidigare forskning på området har bland annat berört metoder för bladvändning, digitala notställ och digital semantisk förståelse av noter. Trots rapporter om musikers preferenser relaterat till exempelvis storlek på noterna saknas studier om vilka åsikter och attityder musiker har till fenomenet notläsning på surfplatta och i vilken utsträckning de vill använda det. För att kunna utveckla digitala verktyg som gör nytta för frilansmusiker i det dagliga yrkesutövandet behövs kunskap om hur de använder teknik, vilka förutsättningar som kan underlätta notläsning på surfplattor, och om det finns specifika hinder eller sociala aspekter som påverkar attityder till ny teknik. För att adressera problemet är det av intresse att undersöka attityder kring notläsning på surfplattor. Studiens frågeställning lyder: Vilka attityder har frilansmusiker i en kammarmusikensemble till notläsning på surfplattor? För att undersöka fenomenet genomfördes en kvalitativ “face-to-face survey” på frilansande musiker som är medlemmar i en kammarmusikensemble. I syfte att fånga åsikter, attityder, och känslor genomfördes semistrukturerade intervjuer. För att få en tydlig bild av respondenterna genomfördes även en kort grundläggande enkätundersökning. De transkriberade intervjuerna analyserades genom en tematisk analys där egenskaper kodades utifrån den insamlade informationen. Vidare identifierades teman explicit, utan att leta efter något utöver det som har sagts. Detta utfördes med ett datadrivet tillvägagångssätt, där mönster huvudsakligen framkom ur data snarare än analytikernas intressen. De attityder som framkom i studiens resultat kan beskrivas vara övervägande positiva, främst baserat i att surfplattor av musikerna beskrivs ha logistiska och praktiska fördelar såsom portabilitet, snabb åtkomst, och delning. Utöver de positiva attityderna återfanns även negativa attityder, med teman rörande rädsla för tekniska problem, ovana, och svårigheter med bladvändning och annotering. Begränsningar i studien rör studiens korta tidsperiod och att datainsamlingsmetod i stor grad anpassats efter respondenternas tillgänglighet samt att resultatet inte kan anses fullständigt generaliserbart. Tidigare forskning har till stor del berört enskilda aspekter av digitala noter och experiment i kontrollerad miljö. Studien ger nya insikter relaterat till vad musiker upplever i verkliga sammanhang. Resultatet kan vara till nytta för utvecklare av applikationer för notläsning eller tillverkare av tillbehör för bladvändning. / Sheet music is used to document, communicate, and read music. Traditionally sheet music was read on paper, but with new emerging technology physical paper is partly being replaced by digital devices such as tablets. Some advantages of digital sheet music and tablets are described as portability, rapid access, and possibility for easier page turns. Possible disadvantages could be difficulty annotating and small screen sizes. Previous research on the subject has touched on different methods for page turning, digital music stands, and digital semantic understanding of sheet music. Reports about some aspects of musicians preferences, for example regarding size of note staffs are found in the literature, but there is a lack of research on which attitudes and opinions musicians hold regarding reading music from tablets. To be able to develop digital tools that create value for freelance musicians in their daily work, knowledge about how they use technology and which obstacles hinders use. To address the problem it is interesting to explore attitudes towards reading music from tablets among freelance musicians. The research question of this study is: Which attitudes do freelance musicians in a chamber music quartet hold towards reading music on tablets? To explore the phenomenon, a qualitative “face-to-face survey” was performed on freelance musicians that are members of a chamber music quartet. Semi structured interviews were conducted to acquire attitudes, opinions, and emotions. A small questionnaire was also used to get a clear picture of the participants and gather background information. The transcribed interviews were analyzed by first coding interesting characteristics based on the information collected. Furthermore, themes were identified explicitly, without looking for anything beyond what has been said. This is done with a data-driven approach, where patterns emerge mainly from the data rather than the interests of analysts. The attitudes that were held by the participants of the study can be described as mostly positive, based on that tablets were described having logistic and practical advantages such as portability, rapid access and sharing. However, some negative attitudes were found among the musicians, concerning fear of technical problems, unfamiliarity, and difficulty turning pages and annotating. Limitations in the study relate to the study's short time period, that the data collection method was largely adapted to the respondents' availability, and that the results cannot be considered generalizable. Previous research has largely concerned individual aspects of digital sheet music and experiments in a controlled environment. The study provides new insights related to what musicians experience in a real life environment. The result may be useful to developers of music reading applications or manufacturers of page turning accessories.
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Se och synas : En studie om att synliggöra förbättringsarbetenFjaestad, Anna January 2016 (has links)
Se och synas är ett examensarbete i informationsdesign med inriktning mot textdesign. Syftet med detta arbete är att synliggöra förbättringsarbeten på företag med lean-produktion. Examensarbetet ingår i ett större forskningsprojekt, Integrering av innovationsorienterat arbete i lean-produktionssystem, ett samarbete mellan forskare på Mälardalens högskola och olika fallföretag där Eskilstuna ElektronikPartner AB är en av dessa företag. Arbetet strävar efter att ta fram ett designförslag som ska få målgruppen att tänka på förbättringar genom att synliggöra förbättringsarbeten. Målet är att få målgruppen att se och synas, det vill säga se förbättringar och visa upp förbättringsarbeten genom att synas. Under inhämtningen av empirin från observationer, intervjuer och fokusgrupp visade det sig att målgruppen genomför många förbättringar som inte synliggörs och att de önskade mer företagsinformation. Inläsningen av teorier och litteratur kring kognitiv psykologi, stilmarkörer i text, riktlinjer för lättläst text och principer för layout och grafisk form gav mig kunskap om hur information kan utformas på digitala storbildsskärmar. Text och grafik måste vara tydligt utformade. Genom stilmarkörer i språket, lättskrivna texter och hierarkier i grafisk form görs informationen läslig och lätt att förstå. Utifrån empiri och teori har ett gestaltningsförslag tagits fram som synliggör förbättringsarbeten på företag med lean-produktion. Gestaltningen utgår från målgruppens åsikter och består av ett handlingsmönster där förbättringsarbetet synliggörs både muntligt och skriftligt. Gestaltningen består också av en fysisk artefakt där information kring förbättringsarbeten visas på digitala storbildsskärmar. / To see and be seen is a thesis in information design with emphasis on text design. The aim of this thesis is to visualiz improvement in companies with lean production. This thesis is a part of a reseach about embedding innovation-oriented work within lean-production systems. This reseach i based on cooperations between reseachers at Mälardalens högskola and different business cases. On of these business cases is Eskilstuna ElektronikPartner AB. This theses aims to develop a designproposal that will get the target group to consider improvements by visualizing improvements. The goal is to get the target group to see and be seen , that is to see improvement and demonstrate improvement by appearing. From the result of empirical data gathered from observations, interviews and focusgroups has shown that the target group implements many improvements that are not made visible and that they wanted more company information. The conclusion of theories about cognitive psychology, style markers in text, guidelines for readable text and principles of layout and graphic design, gave me knowledge of how information can be designed in digital large screens. Text and graphic design must be clear. Through style markers in text, easily written texts and hierarchies in graphical form, information can be made legible and easy to understand. Based on the empirical work and the theories a design proposal has been developed that visualiz improvements in companies with lean production. The design is based on the opinions of the target group and consists of a pattern of behavior where improvement efforts are made visible both orally and in writing. The design also consists of a physical artifact, where information about the improvement is shown on digital large screens. / Integrering av innovationsorienterat arbete i lean-produktionssystem
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Digitala skyltar i stadsmiljö : Utvärdering av ljusemitterande storbildsskärmars kontrastförhållande och påverkan på det upplevda stadsrummet / Digital signages in urban environmentsMartinsson, Viktor, Wikström, Tina January 2017 (has links)
Denna studie syftar till att förse kommuner och fackmän med en rimlig utgångspunkt vid upprättande av ljusemitterande skyltar i stadsmiljö och på så vis bidra till perceptuellt väl sammansatta stadsrum. De vägledande frågeställningar som tas upp i rapporten ser till såväl lämpliga kontrastförhållanden som digitala skyltars påverkan på rumsupplevelsen. Med grund i vetenskapsteori rörande seende, rumslig upplevelse och digitala skyltar upprättades en 20 kvadratmeter stor digital skylt på Tändstickstorget i Jönköping, vari ett fältexperiment kom att äga rum den 15 mars 2017. Under experimentet kom skylten att ställas till sex olika scenarier med avseende på skyltluminans och kontrastförhållande till dess direkta omgivning, vilka samtliga granskades av en respondentgrupp om 20 personer. Därefter följde en omfattande visuell utvärdering av den digitala skyltens perceptuella påverkan på det aktuella torgrummet, med skylten inställd på det scenario som dömts behagligast. Av resultaten framgår att ett lågt kontrastförhållande mellan den ljusemitterande skylten och dess direkta omgivning föredras framför ett högt, då en tydlig korrelation mellan höga kontraster och obehag identifierats. Vidare visar resultaten att en digital skylt leder till att stadsrummet som helhet upplevs mörkare och att dess upplevda form och storlek förändras. Konkurrens uppstår mellan lokala landmärken och skylten, då dess luminanta yta blir det dominerande objektet i synfältet. Det framgår tydligt av undersökningen att beslut vid implementering av digitala skyltar i stadsmiljö bör styrkas med en god kunskapsgrund, något som resultaten och det specifikt för studien utformade mätdataformuläret avser bidra till. / This thesis aims to provide municipalities and professionals with a reasonable starting point when planning for light emitting signs in urban environments, thus contributing to perceptually cohesive urban spaces. The questions raised in this report examine appropriate contrast ratios as well as digital signage’s impact on the spatial experience. Based on scientific theory concerning human vision, spatial experience and digital signage’s a 20-square meter digital sign was installed at Tändstickstorget in Jönköping, where a field experiment took place on the 15th of March 2017. The sign was programmed into six different scenarios with regard to its screen luminance and contrast ratio to its immediate surroundings, all of which were reviewed by 20 respondents. Furthermore, an extensive visual evaluation was carried out to investigate the perceptual impact the digital sign had on the city square, with the sign set to the scenario deemed most pleasant. The results show that a low contrast ratio between the light emitting sign and its immediate surroundings is preferred to a high ratio, seeing as a clear correlation between high contrasts and discomfort has been identified. Moreover, the results show that a digital sign makes the urban space perceptually darker overall, whilst at the same time affecting the form and size of the space. Competition arises between the local landmarks and the sign, as its luminous surface becomes the dominant object in the field of view. It is clear from the study that decisions regarding the implementation of digital signs in urban environments should be strengthened with a good knowledgebase, which the results along with the measurement data form developed specifically for the study intends to contribute with.
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Kino teatro lankomumo svyravimai Europos Sąjungoje 1990-2007 m / Fluctuations in cinema attendance (eu, 1990-2007)Jurgelaitytė, Žydrūnė 26 June 2014 (has links)
KINO TEATRO LANKOMUMO SVYRAVIMAI EUROPOS SĄJUNGOJE 1990 - 2007 m. Santrauka Nuo 1990 metų prasidėjo kino teatro lankomumo atgimimas, užbaigęs ankstesnį tris dešimtmečius trukusį kino teatro lankomumo mažėjimą. Naujieji amerikietiško tipo kino teatrai – multipleksai – turintys 8 ir daugiau kino sales bei rodantys įspūdingus, finansiniu požiūriu itin sėkmingus filmus, sugrąžino auditoriją į kino teatrus. Bet jau 2001 metais pagal kino teatrų skaičių Europos Sąjungos 15 šalių kino rinka, charakterizuojama kaip galutinai įsotinta ir kurios neįmanoma plėsti vien tik plečiant kino teatrų tinklą. Didžiausias kino teatro lankomumo augimo potencialas stebimas Europos Sąjungos naujosiose šalyse, kur į kino rinkas iki šiol investuota santykinai mažai. Čia palyginus mažas kino ekranų skaičius, tenkantis šalies gyventojams bei mažas kasmetinis apsilankymų skaičius, tenkantis vienam gyventojui. Darbe nustatomos priežastys, sukėlusios kino teatro lankomumo svyravimus, iš kurių pagrindine laikoma – multipleksų plėtra. Darbe teigiama, kad šalyse, kuriose mažiausiai išvystyti multipleksai, yra mažiausias kino teatrų lankomumas. Šis darbas, vertinant jo praktinę reikšmę, turėtų būti aktualus vystantiems kino verslą ir visiems besidomintiems kinu, kino istorija, kino teatrų auditorijos pasikeitimu, multipleksų atsiradimu ir jų įtaka formuojant vartojimo įpročius. / FLUCTUATIONS IN CINEMA ATTENDANCE (EU, 1990 – 2007) Summary Since 1990 cinema attendance began to revive after having declined over a 30-year period. The arrival of American-style multiplexes – new cinemas with eight or more screens demonstrating blockbuster films – had successfully attracted audiences back to the cinema. Since 2001 in terms of the number of cinemas, EU 15 countries cinema market was already described as fundamentally saturated and can no longer be expanded by building new cinemas. The greatest potential lies with new EU countries that untill now have seen less intensive investment. Here cinema markets have low screen densities, which are currently accompanied by low admission – per capita ratios. This paper examines the reasons of fluctuations in cinema attendance and considers the impact of the multiplex development. In terms of practical meaning, this paper should be relevant to cinema business developers and all others being intersted in cinema, cinema history, changes in cinema audiences, rise of multiplex and its impact on consumer habbits.
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Tempêtes. Composition audiovisuelleBreuleux-Ouellette, Yan 05 1900 (has links)
No description available.
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Interaktivní stolek ve výuce českého jazyka na 1. stupni ZŠ / Interactive Table in Czech Language Teaching at Elementary SchoolSCHWARZOVÁ, Lucie January 2017 (has links)
The main aim of my thesis is to mediate information about interactive tables in the Czech language teaching at elementary schools and elaboration of the methodical support for teaching. The thesis is divided into the theoretical part, which includes the first three chapters, and the practical part which has two chapters. In the theoretical part the author first introduces readers with interactivity, technical and historical development of the tables and their use in teaching. Second chapter brings knowledge about teaching methods with the use of interactive tables, the requirements on teachers, and the positive and negative advantages of the use of the tables based on the teachers and the students view. The third chapter represents main resources of teaching materials. The practical part is based on the creation of the methodical support for teaching, which provides detailed instructions for working with the SMART Table. The subject of the fourth chapter is working with the SMART table, adjustment of the table and the work with activities. Fifth chapter will introduce the computer program SMART Table Toolkit, his installation, adjustment, adjustment of activities and their use in teaching.
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Vliv předplodiny na výnos a kvalitu ovsa / The influence of foregoing crop on oats yield and qualityPOLÁČKOVÁ, Jitka January 2013 (has links)
Nowadays trend in Europe is returning to harvesting of traditional feeding crops. One of these crops is oat which has been universally used since time immemorial. Even today oats are processing and using in food industry and as a feed for farm animals. Further using of oats is in cosmetics and pharmaceutical industry. Oats contain high amount of proteins and fats, beta-glukan and mineral elements. Oats include vitamins B and E, lecitin, niacin and antioxidants. Research was executing on fields of University of South Bohemia in České Budějovice during one year. An impact on crop yield and quality of oats was observed in dissertation. There were used three crops corn, rape and cereal (spring wheat) in research. After these crops were sown ten varieties of oats, four naked and six husked varieties. At these varieties were observed an impact on crop yield and quality of oats. Evaluated characters were monitored during the vegetation, pre-harvest and post-harvest. There were observed germination and methane, height of vegetation, the degree of lodging oats, the number of lat m2, weeds, diseases and pests, after harvest was determine harvested grain yield, moisture and density, number of grains per panicle, thousand grain weight and grain on a network share during the vegetation. From the measured values follows that the best crop in year 2012 was corn and the best results were achieved by variety Abel, Avenuda, Atego, Pogon, Salo.
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Empirical Methods for Detecting Bid-rigging Cartels / Méthodes empiriques pour la détection des cartelsImhof, David 02 October 2018 (has links)
Le projet de thèse présente différentes méthodes empiriques permettant de détecter des cartels. Il vise à démontrer premièrement que des résultats efficaces peuvent être obtenus avec de simples indicateurs statistiques et deuxièmement que les méthodes économétriques traditionnelles ne sont pas aussi efficaces. / The PhD studies different empirical methods to detect bid-rigging cartels. It shows first that simple statistical screens perform very well to detect bid-rigging infringement. Second, the econometric method of Bajari, well established in the literature, produces poor results.
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