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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.
11

Ciliate molecular phylogeny and species concepts

Hall, Meaghan Sagar. January 2010 (has links)
Honors Project--Smith College, Northampton, Mass., 2010. / Includes bibliographical references (p. 18-21, 54-60).
12

Speed Performance Comparison of JavaScript MVC Frameworks

Alexander, Svensson January 2015 (has links)
ABSTRACT   Context: Many websites today are very interactive and the users are getting used to sites that change hundreds of elements every second. Often a JavaScript framework is used to build the web site and with many changing elements on the site the need for a JavaScript framework that can handle the fast changes are needed. Each frameworks do it differently to achieving this but most of them do some manipulation with the Document Object Model (DOM).     Objectives: This research will show how fast the selected MCV like JavaScript frameworks (AngularJs, AngularJs 2.0, Aurelia, Backbone, Ember, Knockout, Mithril, Vue) can create, delete and update HTML elements on the screen.     Methods: This research have used Google Chromes TimeLine tool to measure the speed of the frameworks. The test involves creating a HTML table and fill it with a thousand rows of data with six columns. The tables content are tested to see how fast the frameworks can create, update and remove the elements.       Conclusions: Angular 2.0 almost achieved first place in all tests. Angular 1.5 did very good in the update tests and was good in the create elements test. Backbone and Ember did not do so well in the create and update tests but Backbone was the best framework in one of the delete tests. Aurelia got very good results and so did Vue which almost had the same values as Aurelia throughout the tests. Mithril and Knockout performed well in the create test which placed them in the middle among all the selected frameworks. When it came to the update tests Mithril and Knockout also found them self in the middle positions of all the frameworks.          Key Words: JavaScript, Framework, performance, Angular, Aurelia, Backbone,  Ember, Knockout, Mithril, Vue.
13

Population dynamics and feeding of the moon jellyfish (Aurelia aurita) in Tapeng Bay, southwestern Taiwan.

Cheng, Yi-Ling 09 September 2002 (has links)
The population dynamics and the feeding of the scyphomedusa Aurelia aurita in Tapeng Bay, southwestern Taiman, were investigated from April, 1999 to April, 2000 and May, 2001 to April, 2002. A. aurita distributed mainly in the inner water of the Bay. The average abundance of A. aurita was 71¡Ó256 ind.100m¡Ð3, with higher abundance in winter and spring than in summer and autumn. The abundance of A. aurita showed no significant correlation with hydrographic features, but it seems to have one or two month¡¦s time lag with the seasonal distribution pattern of copepods. The main reproduction period of A. aurita was form autumn to next spring. The occurrence of ephyra was mainly in winter and spring, with maximum abundance of 328 ind./100m3. The average bell diameter of A. aurita was 13.9¡Ó4.2 cm. The size of bell diameter varied seasonally, generally had larger size in autumn and smaller size in spring. Seventeen zooplankton taxa were found in the stomach contents of A. aurita, copepods were the most dominant (70.3%), followed by copepods nauplius (20.1%), bivalve larva (3.0%) and fish eggs (2.3%). The average ingestion rate of A. aurita was 2165¡Ó2673 prey ind.-1 day-1 , the feeding impact of A. aurita on zooplankton was 14.69 % ~ 40.84 % %, with no significant difference among sizes.
14

Effects of temperature, light intensity and salinity on asexual reproduction of the scyphozoan, Aurelia aurita (L.) in Taiwan

Liu, Wen-Cheng 06 February 2009 (has links)
Jellyfish blooms create problems worldwide, which may increase with global warming, water pollution, and over-fishing. Benthic polyps (scyphistomae) asexually produce buds and small jellyfish (ephyrae), and this process may determine the population size of the large, swimming scyphomedusae. Environmental factors that affect the asexual reproduction rates include food, temperature, salinity, and light. In the present study, polyps of Aurelia aurita (L.), originated from Tapong Bay, southwest Taiwan, were studied in different combinations of temperatures (T), light intensities (L), and salinities (S). In the T (20, 25, 30¢XC) ¡Ñ L (372, 56, and 0 lux) experiment which was with a 12 h light-12 h dark photoperiod, production of new buds decreased with warmer temperatures and stronger light intensity. Warm temperatures accelerated strobilation and increased the daily production of ephyrae. The proportion of ephyrae to total asexual reproduction (new buds + ephyrae) increased dramatically in warmer temperatures and stronger light. Survival period was reduced at the highest temperature. Strobilation did not occur at the lowest temperature in darkness. All measures of total asexual reproduction indicated that medium to high temperatures would lead to faster production of more jellyfish; however, continuous high temperatures might result in high polyp mortality. Light intensity affected asexual reproduction less than did temperature, only significantly accelerating the strobilation rate. Because the interactive effects of light and temperature were significant for polyp survival time and the production of jellyfish per polyp, combined light and temperature effects are likely important for strobilation in situ. In the T (27, 31, 35¢XC) ¡Ñ S (25, 30, and 35) experiment which was in dark environment, production of new buds decreased with higher temperatures and salinity. The proportion of ephyrae to total asexual reproduction (new buds + ephyrae) increased with warmer temperatures, but survival period was reduced at the highest salinity, and strobilation was substantially reduced, even though the temperature was warmer compared to the T ¡Ñ L experiment. Salinity affected asexual reproduction less than did temperature, only significantly affecting production of new buds, and slightly affecting survival period and the proportion of ephyrae to total asexual reproduction. According to these two experiments, warmer temperature may accelerate strobilation in light condition and lead to better yield of swimming jellyfish, however continuously warm temperature would reduce the yield by decreasing budding and higher mortality. Complete dark led to much less strobilation, especially at low temperatures, suggesting that the existence of light might be more important than light intensity. The effects of salinity on asexual reproduction were not as conspicuous as that of temperature and light.
15

Ecological Studies of the Scyphozoan Jellyfish Aurelia coerulea: Implications for the Mechanisms of Their Outbreaks / 大発生機構解明に向けたミズクラゲAurelia coeruleaの生態学的研究

Suzuki, Kentaro 23 March 2020 (has links)
京都大学 / 0048 / 新制・論文博士 / 博士(農学) / 乙第13339号 / 論農博第2882号 / 新制||農||1079(附属図書館) / 学位論文||R2||N5246(農学部図書室) / 京都大学大学院農学研究科応用生物科学専攻 / (主査)教授 山下 洋, 教授 朝倉 彰, 准教授 益田 玲爾 / 学位規則第4条第2項該当 / Doctor of Agricultural Science / Kyoto University / DFAM
16

Jämförelse av Javascript-ramverk : En undersökning på CSN

Ramsell, Daniel January 2017 (has links)
In this report, a number of different Javascript-frameworks have been compared. The study is conducted at CSN (Centrala studiestödsnämnden). The study consists of two main parts, an evalua- tion through the literature study and an evaluation of the implementa- tion. The first part of the survey has Javascript-frameworks Angular2, Aurelia, Ember, Meteor and React comparisons. Together with CSN, a few criteria have been developed which will then be awarded points between one and five depending on how well a Javascript-framework meets a specific criterion. Five points are given when the Javascript- framework meets the entire criterion, one point is given when it partial- ly meets the criterion. After the first part of the investigation, Angular2 and Aurelia found that they would move on to the implementation phase. The implementation consists of a couple of windows from the existing service "Mina tjänster". In the evaluate implementation measures time for implementation, web browsing time, and number of code rows. From this it was found that Aurelia has less number of code rows than Angular 2. The reading time for Angular 2 is three times longer than Aurelia. In the evaluation of how difficult it is to implement the two frameworks, Angular 2 is considered to be "Average" and Aurelia to "Hard". The Javascript-framework recommended for CSN is Angular 2. This is because much more documentation about Angular 2 is available, and the difficulty is lower for Angular 2. The startup of a project is also much easier in Angular 2, which means that it requires less time to get into the framework. / Sammanfattning: I denna rapport har ett par olika Javascript-ramverk jämförts. Studien är utförd på CSN (Centrala studiestödsnämnden). Undersökningen består av två huvuddelar, en utvärdering genom litteraturstudie samt en utvärdering av implementation. I första delen av undersökningen har Javascript-ramverken Angular2, Aurelia, Ember, Meteor och React jämförts. Tillsammans med CSN har ett par kriterier tagits fram som det sedan kommer att delas ut poäng mellan ett till fem beroende på hur väl ett Javascript-ramverk uppfyller ett specifikt kriterium. Fem poäng ges ut då Javascript-ramverket uppfyller hela kriteriet, ett poäng ges ut då det delvis uppfyller kriteriet. Efter första delen av undersökningen kom det fram till att Angular2 och Aurelia skulle gå vidare till implemente- ringsfasen. Implementeringen består utav ett par fönster från den befintliga tjänsten ”Mina tjänster”. I utvärderingen av implementation mäts tid för implementering, inläsningstid för webbapplikationen samt antalet kodrader. Ur detta konstaterades det att Aurelia har mindre antalet kodrader än Angular 2. Inläsning tiden för Angular 2 är tre gånger längre än Aurelia. Men i bedömningen om hur svårt det är att implementera de bägge ramverken bedöms Angular 2 till nivån ”Me- del” och Aurelia till ”Svår”. Det Javascript-ramverk som rekommende- ras till CSN är Angular 2. Detta grundas på att det finns betydligt mycket mer dokumentation om Angular 2, samt att svårighetsgraden är lägre för Angular 2. Uppstarten av ett projekt är även mycket enklare i Angular 2, vilket betyder att det kräver mindre tid för att sätta sig in ramverket.
17

Webbapplikation med industriell IT-lösning : Demoprototyp av produktionslinjen Det varma flödet / Web application with industrial IT solution : Demonstration prototype of The Heated Stream’s production line

Tivefälth, Richard, Almstedt, Oskar January 2017 (has links)
Inom tillverkningsindustri används styrsystem för att övervaka och styra produktionen. Företaget Outokumpu har en produktionsanläggning i Degerfors för valsat rostfritt stål, kallat Det varma flödet. Det nuvarande systemet övervakar och styrs av en applikation som enbart fungerar i Windows-miljö. För att få en flexiblare övervakning av produktionslinjen och kunna använda andra enheter såsom surfplattor, eller nå informationen över internet, har vi fått i uppdrag att utveckla en webb-baserad prototypapplikation. Denna applikation kan simulera produktionen i realtid för olika scenarion. Användaren blir informerad om vart materialen befinner sig i produktionslinjen, statistik över produktionen, stillestånd och fyllnadsgrad i ugnar. Denna realtidsbaserade webbapplikation har utvecklats med ramverken ASP.NET Core och JavaScriptspråket TypeScript tillsammans med ramverket Aurelia. Vid vidareutveckling av prototypen kan all funktionalitet från den nuvarande applikationen implementeras i prototypen, exempelvis så att operatörer kan kontrollera produktionsverksamheten och inte endast övervaka. / Manufacturing systems uses control systems to monitor and control the production. The company Outokumpu has a production in Degerfors for rolling stainless steel, called The Heated Stream. The current system is monitored and controlled by an application that only works in Windows environment. By having the system more flexible and making the monitoring of the production available on other devices such as tablets or to get the information on the internet. Our project is a prototype of a real-time web application which will simulate the production with different scenarios. The user of this application will be informed with position of the material currently in production, statistics about the production, a machince downtime and the fill ratio of the ovens. The real-time application has been developed using the framework ASP.NET Core and the JavaScript language TypeScript working with the framework Aurelia. For future development of the prototype, all features from the current system could be implemented such as to control the production line from the web application and not just to monitor the system.
18

Design and Development of a Bio-inspired Robotic Jellysh that Features Ionic Polymer Metal Composites Actuators

Najem, Joseph Samih 17 May 2012 (has links)
This thesis presents the design and development of a novel biomimetic jellyfish robot that features ionic polymer metal composite actuators. The shape and swimming style of this underwater vehicle are based on oblate jellyfish species, which are known for their high locomotive efficiency. Ionic polymer metal composites (IPMC) are used as actuators in order to contract the bell and thus propel the jellyfish robot. This research focuses on translating the evolutionary successes of the natural species into a jellyfish robot that mimics the geometry, the swimming style, and the bell deformation cycle of the natural species. Key advantages of using IPMC actuators over other forms of smart material include their ability to exhibit high strain response due to a low voltage input and their ability to act as artificial muscles in water environment. This research specifically seeks to implement IPMC actuators in a biomimetic design and overcome two main limitations of these actuators: slow response rate and the material low blocking force. The approach presented in this document is based on a combination of two main methods, first by optimizing the performance of the IPMC actuators and second by optimizing the design to fit the properties of the actuators by studying various oblate species. Ionic polymer metal composites consist of a semi-permeable membrane bounded by two conductive, high surface area electrode. The IPMCs are manufactured is several variations using the Direct Assembly Process (DAP), where the electrode architecture is controlled to optimize the strain and stiffness of the actuators. The resulting optimized actuators demonstrate peak to peak strains of 0.8 % in air and 0.7 % in water across a frequency range of 0.1-1.0 Hz and voltage amplitude of 2 V. A study of different oblate species is conducted in order to attain a model system that best fits the properties of the IPMC actuators. The Aequorea victoria is chosen based on its bell morphology and kinematic properties that match the mechanical properties of the IPMC actuators. This medusa is characterized by it low swimming frequency, small bell deformation during the contraction phase, and high Froude efficiency. The bell morphology and kinematics of the Aequorea victoria are studied through the computation of the radius of curvature and thus the strain energy stored in the during the contraction phase. The results demonstrate that the Aequorea victoria stores lower strain energy compared to the other candidate species during the contraction phase. Three consecutive jellyfish robots have been built for this research project. The first generation served as a proof of concept and swam vertically at a speed of 2.2 mm/s and consumed 3.2 W of power. The second generation mimicked the geometry and swimming style of the Aurelia aurita. By tailoring the applied voltage waveform and the flexibility of the bell, the robot swam at an average speed of 1.5 mm/s and consumed 3.5 W of power. The third and final generation mimicked the morphology, swimming behavior, and bell kinematics of the Aequorea victoria. The resulting robot, swam at an average speed of 0.77 mm/s and consumed 0.7 W of power when four actuators are used while it achieved 1.5 mm/s and 1.1 W of power consumption when eight actuators are used. Key parameter including the type of the waveform, the geometry of the bell, and position and size of the IPMC actuators are identified. These parameters can be hit later in order to further optimize the design of an IPMC based jellyfish robot. / Master of Science
19

Implementation och utvärdering av fika-applikation : En Design Science Research studie / Implementation and evaluation of a Fika-application : A Design Science Research study

Lindblad, Adam January 2023 (has links)
På företaget AFRY i Karlstad har en medarbetare med fika varje fredag och turordningen för detta sker i dagsläget med en Excel-fil vilket är problematiskt då inte alla har tillgång till filen och kan då inte se när det är deras tur att ta med fika, vilket resulterar i att det glöms av att ta med fika. Författaren har fått i uppdrag av AFRY att ta fram en webbaserad applikation där personalen kan se schemat för vems tur det är att ta med fika. En kravspecifikation upprättades av uppdragsgivaren tillsammans med en lista på den tekniska uppsättningen för webbapplikationen som gäller. Studiens syfte är att undersöka vilka komplikationer som uppstår vid implementationen samt hur användarna mottar applikationen. För detta har två undersökningsfrågor upprättats som ligger till grund för studien: Vad resulterar utvärderingarna i och vilka förslag till förbättring mottogs? Vilka komplikationer uppstår vid implementationen och hur har dessa lösts? Design Science Research applicerades som forskningsstrategi för studien där momenten Specificera krav, Implementering och Utvärdering användes för att skapa artefakten som det studeras kring. En agil arbetsmetod låg till grund för att föra arbetet framåt där det utvecklades i tre sprintar. Artefakten utvärderades av testpersoner som var personal hos uppdragsgivaren och det genomfördes Black Box- och Manuella tester där testpersonerna fick uttrycka och reflektera kring implementationen som utförts. Data samlades in med hjälp av strukturerade intervjuer där författaren förde anteckningar på vad som uttrycktes. Utvärderingarna resulterade i att det som implementerades saknade funktionalitet som testpersonerna efterfrågade. Flertalet data samlades in som påvisar att de krav som ställdes skulle behövt specificerats ytterligare för att uppnå högre tillfredsställelse från testpersonerna. De komplikationer som påträffades under implementationen kunde antingen lösas genom att läsa dokumentationen för teknik som användes eller att testpersonerna, som innehar mer erfarenhet än författaren, kunde lösa dessa. Slutsatsen för studien är att krav som ställs måste specificeras mer detaljrikt för att artefakten skall bli så likt användarnas bild av den som möjligt.

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