Tesi sul tema "Online GIS"
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1
Martin, Brandon Todd. "Opportunities for an Online GIS-Based Wood Supply Management System". Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34440.
Testo completoAbstract (sommario):
The forest industry has become more complex due in part to increasing global competition. The highly fragmented nature of the forest industry supply chain and lack of interaction between industry segments can cause major supply/demand inequalities. This fragmented nature can lead to unnecessary lead time and costly inefficiencies for business transactions. The objective of this research project is to develop the concept of using an Internet-based, Geographic Information System (GIS)-supported, optimized wood supply chain management system to overcome some of the current inefficiency problems. Currently many different forms of relevant supply chain management information can be found on the World Wide Web. Through review of Internet-related material, this project identified three classes of existing web resources relevant to the development of a forest industry supply chain management system: resource, market, and e-commerce sites. Internet information provides many of the basic data attributes needed in a supply chain management system. This project demonstrated that linking this data with geographic/spatial location (georeferencing) could add an extra dimension in the planning and decision making processes and will be a key development to push the boundaries of supply chain optimization. Within the forest industry, georeferencing of supply chain business entities can easily be done with GIS. Using GIS, members of the forest industry supply chain can be visually and spatially allocated to form a grand forest industry supply chain overview and specific business opportunities using this geo-referenced data platform can be developed. Although the technology exists to produce a high quality Internet-based supply chain network system, there are challenges in producing a system that is truly integrated among all industry partners. Technology obstacles, anti-trust regulation, reluctance to use the online platforms, and inaccurate information input and dispersal are some of the major issues facing a supply chain management tool that are discussed in this report. To demonstrate how a GIS-based supply chain management system could be implemented, three case studies have been presented to show how the proposed system would benefit the current industry in realistic situations. These include (1) a simple location-based search of consulting foresters, (2) a trucking logistic optimization, and (3) a quantitative resource assessment within a manufacturing facility procurement area. Case 1 demonstrates how geocoded landowner and consulting forester information can add efficiency in communication and services provided. Case 2 demonstrates that GIS paired with geocoded information gives a logger increased decision-making power by choosing the most profitable option in a choice between sawmills that includes transportation costs. Lastly, case 3 shows that by analyzing geocoded resource information, a manufacturer can make the proper decision of whether to expand or contract operations. In each case, added value was given to market players that were able to have analysis power through geocoded information. This information is not readily used at the present time and could potentially add value along many steps of the forest industry supply chain.Master of Science
2
Pettersson, Fredrik. "GIS-stöd för tunga rundvirkestransporter på väg". Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-41779.
Testo completoAbstract (sommario):
För att framföra en timmerlastbil med 74 tons bruttovikt i svensk trafik, krävs ett tillstånd från Trafikverket. Tillståndet består av ett dokument som visar vilka vägar och broar fordonet får trafikera och vilka regler som gäller när man kör lastbilen. Skogsbolaget Sveaskog startade ett examensarbete med syfte att skapa möjlighet att i realtid presentera för lastbilsföraren vilka vägar och broar som är en del av transportdispensen. Detta skulle ske genom att utveckla ett kartstöd för lastbilens fordonsdator med anslutning till GPS för att visualisera dispensdokumentet med de angivna vägsträckorna och broarna. Resultatet av examensarbetet är ett kartstöd som använder tjänster från ArcGIS Online för att presentera geografisk information för användaren. Bakgrundskartan består av en grundkarta från ArcGIS Online. Över grundkartan ligger ett GIS-skikt med vägar och ett annat skikt med broar. Information om huruvida fordonet för närvarande färdas på en väg som ingår i tillståndet eller inte, samt information om regler som gäller för broar på vägavsnittet, presenteras för föraren i realtid. Denna information uppdateras vid varje uppdatering av GPS-positionen.In order to use a timber truck with 74 ton gross weight in Swedish traffic, a permit from the Swedish transport administration is required. A document shows which roads and bridges the vehicle is allowed to traffic and what rules applies when driving the vehicle. The forest company Sveaskog started a thesis with the aim to create the possibility to determine in real time, which roads and bridges that are part of the transport permit. This should be done by developing a map support for the truck's on-board computer with connection to GPS to visualise the permit of the specified road sections and bridges. The result of the thesis is a map support using services provided by ArcGIS Online to present geographic information to the user. The background map consist of a base map from ArcGIS Online. On top of the background map is a GIS layer with roads and another layer with bridges. Information about whether the vehicle currently is travelling on a road included in the permit or not, as well as information about rules that applies to bridges on the road section, is presented to the driver in real time. This information is updated at each update of the GPS position.
3
Metla, Jagadish Apparao. "Participation technologies a framework for the development of an online interactive GIS application /". [Ames, Iowa : Iowa State University], 2008.
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4
Adams, Christiaan Scott 1973. "An interactive, online Geographic Information System (GIS) for stakeholder participation in environmental site selection". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/30073.
Testo completoAbstract (sommario):
Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.Vita.
Includes bibliographical references (p. 113-116).
An interactive, online geographic information system (GIS) was developed to enhance the involvement of stakeholders in the public participation processes of site selection issues in the marine environment. Displaying educational material and interactive maps of relevant data, this new tool allows users to input personal preferences for the criteria they value in the siting decision, and produces a map showing the most and least suitable sites according to the user's weighting of the criteria. Current decision-making processes focus on finding an optimum solution from a number of alternatives using an objective analysis of the criteria, but are often inaccessible to many stakeholders, and do not consider the fairness of the outcome to the stakeholders. This tool is intended to educate stakeholders and enhance their involvement in the public decision-making process. To demonstrate the interactive, online GIS concept, a website called eSite was assembled, using as its case study the hypothetical issue of siting marine reserves within the Stellwagen Bank National Marine Sanctuary. Marine resource protection is a controversial issue with many stakeholders in New England, where fishing in the Gulf of Maine has a long history, and human activities have had significant impacts on the marine environment. Marine reserves are an emerging tool for protecting marine ecosystems and enhancing marine resources, and the siting of reserves is an important emerging issue. Pre and post-surveys were conducted as part of the demonstration site to evaluate eSite. It was shown to be effective at increasing understanding of marine reserves and was perceived as a useful tool in improving the decision-making process.
by Christiaan Scott Adams.
S.M.
5
Baxmann, Matthias. "Spatial consensus-building through access to web-based GIS : an online planning tool for Leipzig". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/64538.
Testo completo
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Palem, Srikanth Venkata. "Design and implementation of an Internet based Spatial Decision Support System(SDSS) for Freight Management". See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1091799341.
Testo completoAbstract (sommario):
Thesis (M.A.)--University of Toledo.Typescript. "A thesis [submitted] as partial fulfillment of the requirements of the Master of Arts degree in Geography." Includes bibliographical references (leaves 94-99).
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Taeger, Stefan. "GIS-gestützte Habitatmodelle für die Pflege- und Entwicklungsplanung in Großschutzgebieten : methodische Untersuchungen und Praxistest am Beispiel avifaunistischer Habitatmodelle für das Biosphärenreservat "Spreewald"". Hannover Inst. für Umweltplanung, 2008. http://www.umwelt.uni-hannover.de/fileadmin/institut/Beitraegez̲urr̲aeumlichenP̲lanung8̲4w̲ww.pdf.
Testo completo
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Shea, Geoffrey Yu Kai Surveying & Spatial Information Systems Faculty of Engineering UNSW. "A Web-Based Approach to the Integration of Diverse Data Sources for GIS". Awarded by:University of New South Wales. Surveying and Spatial Information Systems, 2001. http://handle.unsw.edu.au/1959.4/17855.
Testo completoAbstract (sommario):
The rigorous developments of GIS over the past decades have enabled application developers to create powerful systems that are used to facilitate the management of spatial data. Unfortunately, each one of these systems is specific to a local service, with little or no interconnection with services in other locales. This makes it virtually impossible to perform dynamic and interactive GIS operations across multiple locales which have similar or dissimilar system configurations. The Spatial Data Transfer Standard (SDTS) resolved the problems partially by offering excellent conceptual and logical abstraction model for data exchange. Recent advancements of the Internet enlightened the GIS community as to the realization of an ideal concept of information interchange. A suite of new technologies that embraces Extensible Markup Language (XML), Scalable Vector Graphics (SVG), Portable Network Graphics (PNG) and Java creates a powerful and new perspective that can be applied to all phases of online GIS system development. The online GIS is a Web-based approach to integrating diverse spatial data sources for GIS applications. To address the spatial data integration options and implications related to the Web-based approach the investigation was undertaken in 5 phases: (1) Determine the mapping requirements of graphic and non-graphic spatial data for online GIS application; (2) Analyze the requirements of spatial data integration for online environments; (3) Investigate a suitable method for integrating different formats of spatial data; (4) Study the feasibility and applicability of setting up the online GIS; and (5) Develop a prototype for online sharing of teaching resources. Resulting from the critical review on current Internet technology, a conceptual framework for spatial data integration was proposed. This framework was based on the emerging Internet technology on XML, SVG, PNG, and Java. It was comprised of four loosely coupled modules, namely, Application Interface, Presentation, Integrator, and Data module. This loosely coupled framework provides an environment that will be independent of the underlying GIS data structure and makes it easy to change or update the system as a new task or knowledge is acquired. A feasibility study was conducted to test the applicability for the proposed conceptual framework. A detailed user requirements and system specification was thus devised from the feasibility study. These user requirements and system specification provided some guidelines for online GIS application development. They were expressed specifically in terms of six aspects: (1) User; (2) Teaching resources management; (3) Data; (4) Cartography; (5) Functions; and (6) Software development configuration. A prototype system based on some of the devised system specifications was developed. In the prototype software design, the architecture of a Three-Tier Client-Server computing model was adopted. Due to the inadequacy of native support for SVG and PNG in all currently available Web browsers, the prototype was thus implemented in HTML, Java and vendor specific vector format. The prototype demonstrated how teaching resources from a variety of sources and format (including map data and non-map resources) were integrated and shared. The implementation of the prototype revealed that the Web is still an ideal medium for providing wider accessibility of geographical information to a larger number of users through a corporate intranet or the Internet cost-effectively. The investigation concluded that current WWW technology is limited in its capability for spatial data integration and delivering online functionality. However, developing of XML-based GIS data model and graphic standards SVG and PNG for structuring and transferring spatial data on the Internet appear to be providing solutions to the current limitations. It is believed that the ideal world where everyone retrieving spatial information contextually through a Web browser disregarding the information format and location will eventually become true.
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Brenes, Bastos Melissa. "Assessing Geographic Information Systems (GIS) Use in Marketing Applications: A Case of Study in the Wood Products Industry". Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49692.
Testo completoAbstract (sommario):
Geographical Information Systems (GIS) is a worldwide growing technology, however it is not yet completely accepted. Of all of the business processes in an organization, marketing is perhaps one of the natural fitting-processes to apply GIS. Even though there is recent research regarding applications of GIS in the wood products industry, those applications are mostly related to biomass mapping and logistics issues. Little research has been conducted on the utilization of GIS as part of the marketing strategic plan in this industry. Thus, the main goal of this project is to understand GIS uses on marketing application in the wood products industry, specifically in the marketing mix strategic plan.
The approach of this project consisted of the collection and analysis of data from secondary wood products industries in the state of Virginia. In addition, a case of study on current users of GIS applications was conducted. Once the data from the survey and the case study were collected, validated, and analyzed; applications and guidelines for the use of GIS in marketing activities were developed. The first application was the creation of a relational database to organize the information and to create an industry directory for secondary wood products industries. Secondly, clustering techniques were used to test if wood products companies cluster around certain geographical regions. Confirmation of the clustering led to the construction of an online map. Finally, guidelines were developed to describe how to use GIS in the marketing process of wood products firms.
By increasing the knowledge and developing guidelines on GIS uses on marketing mix applications this study will help the wood products industry, other practitioners and the academic community, by providing insight of the industry, possible uses to simplify the strategic process and gain understanding of the environment among other.Master of Science
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Fernandes, Ana Isabel Silvestre. "Estudo comparativo entre interfaces de programação de aplicações de mapas". Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8475.
Testo completoAbstract (sommario):
Dissertação para obtenção do Grau de Mestre em
Engenharia InformáticaEste trabalho debruça-se sobre APIs de mapas para utilização em aplicações com características de georreferenciação, e tem como objetivo realizar um estudo comparativo entre APIs desta natureza, por forma a que o utilizador possa tomar uma decisão informada na escolha de uma API de mapas mais adequada ao seu objetivo. Neste contexto, esta dissertação foca-se no estudo de duas categorias de APIs de Mapas: as de âmbito empresarial e open source. Dentro da categoria empresarial, avaliou-se uma API de grande impacto, a Google Maps JavaScript API da Google e uma diretamente ligada à ciência/engenharia da informação geográfica, a ArcGIS API for JavaScript da Esri. A API de open source escolhida foi a OpenLayers JavaScript Mapping Library da Open Source software community. Como base para a realização do estudo, existem três elementos distintos: três protótipos baseados em cada uma das APIs de mapas escolhidas; as próprias APIs; e um conjunto de aplicações suportadas pela Google Maps JavaScript API, submetidas como trabalhos no contexto da disciplina de Tecnologias de Informação Geográfica (TIG), do Mestrado em Engenharia Informática da FCT/UNL. A todos estes elementos aplicaramse métricas de avaliação de usabilidade, através de um programa desenvolvido para o efeito. Os protótipos desenvolvidos implementam funcionalidades básicas presentes nas aplicações georreferenciadas reais, e o conjunto de aplicações incluem determinados requisitos mínimos, que, neste caso, são semelhantes aos das funcionalidades básicas dos protótipos. Assim, o estudo desenvolvido permite, com base nas métricas, tirar conclusões sobre os objetos mais utilizados, a dimensão das APIs, a facilidade de compreensão das APIs e o estado de evolução de cada API.
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Kale, Rushikesh Digambar. "Development of an Interactive, Hands-on Learning Experience of the Google Maps API". ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1199.
Testo completoAbstract (sommario):
The project is to design and implement a Web application for realizing an innovative, hands-on interactive learning experience for the Google Maps API. This learning environment was developed based on a real-world Geographic Information System (GIS), the Gulf of Mexico Coastal Geospatial Information Support System. Significant efforts were invested not only in development of this GIS system, but also in the design and implement that turns the production system into a learning environment. The Web development aspect attracts computer science students, while the opportunity to learn GIS concepts in an interactive way to attract students from the geography department and the opportunity to learn the Google Maps API proves interesting to regular internet users. The Web learning system was given to a focus group whose feedback was collected through a survey. The survey results reveal a favorable response to the interactive, hands-on learning model and the Web implementation.
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Berry, Robert. "An evaluation of online GIS-based landscape and visual impact assessment tools and their potential for enhancing public participation in wind farm planning in the UK". Thesis, University of South Wales, 2009. https://pure.southwales.ac.uk/en/studentthesis/an-evaluation-of-online-gisbased-landscape-and-visual-impact-assessment-tools-and-their-potential-for-enhancing-public-participation-in-wind-farm-planning-in-the-uk(08087380-8fee-46ee-9e0f-81940137d67c).html.
Testo completoAbstract (sommario):
Effective information communication and public participation in the planning process are important elements for facilitating successful environmental decision-making. Previous research has demonstrated the importance of such factors for delivering benefits to a wide range of stakeholders in the planning system by increasing the transparency and efficiency of the planning process. Given the current problems facing onshore wind farm planning in the UK there is an urgent need to investigate alternative approaches for enhancing the quality of information dissemination and public participation in the planning process. Planning information relating to the potential visual impacts of wind farms is particularly important in the case of the wind farm planning, given the high levels of concern amongst members of the public regarding the perceived negative visual impact of proposed wind turbines on the landscape. However, shortcomings associated with traditional techniques used to assess such impacts have been highlighted in previous research, along with drawbacks related to the dissemination of such information to the public during the planning stages of wind farm development. This has been shown to affect the overall quality of public participation in the planning process. This research is concerned with evaluating the potential of innovative digital landscape visualisation and Internet-based techniques for addressing some of the shortcomings in these areas. This thesis describes the implementation of two survey studies designed to meet these objectives. The first study uses a postal questionnaire approach in order to determine the current 'state-of-play' regarding the levels of use of such innovative techniques for improving impact assessment and information dissemination in wind farm planning. In addition to a review of the existing literature, the findings of the survey provide further rationale for conducting the second (Internet-based) survey study, designed to evaluate the potential of online visualisation-based approaches for improving the quality and dissemination of visual information, and enhancing public participation in wind farm planning. The survey is based on visualisations created for an actual proposed wind farm development in South Wales, UK. The findings reinforced much of the existing research literature, confirming that innovative visualisation and Internet-based approaches do have good potential for augmenting existing methods of visual information creation, dissemination and public participation although a variety of observations and concerns were raised by survey respondents that highlighted the potential limitations of such approaches. Further avenues for research are then identified.
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Costaregni, Amanda Rose. "The Our Florida Reefs Coastal Use Survey: An Online Survey to Support Stakeholder Management Recommendations for Southeast Florida". NSUWorks, 2015. http://nsuworks.nova.edu/occ_stuetd/398.
Testo completoAbstract (sommario):
Coral reefs are an important resource world-wide. Unfortunately, coral reef conditions are declining in many areas due to both global and local stressors. The objective of this study was to survey stakeholders in southeast Florida to better understand reef use in the region. Stakeholders spatially identified where and how often they conducted their activities. These data were compiled and analyzed in GIS to determine spatial use patterns. Both location and intensity of use were analyzed to determine which areas may be under greater stress from recreational activities. It was found that reef use was not evenly distributed in the region but clustered around inlets and piers. Reef use differed between user groups (i.e. SCUBA divers, fishers) and demographics. It was also found that use in the Broward-Miami Coral Reef Ecosystem Region was spread out over a wider spatial scale than the use in the regions north and south..
These data are important as they have the potential to inform the recommendations being made to improve coral reef management in southeast Florida. The study can provide a better understanding of human-environmental relationships and the trade-offs involved so that recommendations can better decrease user conflicts, maximize economic productivity, and preserve the environment.
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Luo, Zhaohui. "GC/FT-ICR Mass Spectral Analysis of Complex Mixtures: A Multidimensional Approach for Online Gas Phase Basicity Measurements". Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/LuoZX2006.pdf.
Testo completo
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Bortolanza, Felipe. "Jornais brasileiros e suas estrat?gias para sobreviver diante da concorr?ncia do jornalismo online". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2011. http://tede2.pucrs.br/tede2/handle/tede/4443.
Testo completoAbstract (sommario):
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Previous issue date: 2011-03-11A consolida??o da internet como meio de comunica??o acirrou a j? disputada concorr?ncia na busca da aten??o do p?blico. Ao ofertar texto e fotos em quantidades ilimitadas, o webjornalismo tirou do jornal o que, por mais de cinco s?culos, foram exclusividades dele enquanto m?dia de massa di?ria. O incremento tecnol?gico, surgido h? 15 anos, ainda leva te?ricos a profetizarem o fim da imprensa escrita, tendo como base a fal?ncia de famosos peri?dicos, especialmente nos Estados Unidos e em alguns centros europeus. No Brasil, contudo, este cen?rio ? bem diferente. Ainda que o tempo m?dio dedicado ? leitura venha diminuindo, crescem a circula??o e, at? mesmo, a variedade de t?tulos. Afinal, o que Reda??es brasileiras est?o fazendo para ficar imunes ? queda de circula??o e fortalecer seu produto? Respostas vir?o ao analisar quatro ?cones do atual jornalismo impresso, todos h? mais de dez anos entre os dez mais vendidos: os tradicionais Folha de S. Paulo e Zero Hora e os populares Extra e Di?rio Ga?cho.
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Teles, Isabel Vieira Pereira. "Avaliação do impacto das TIC nas agências de viagens online madeirenses". Master's thesis, Escola Superior de Hotelaria e Turismo do Estoril, 2010. http://hdl.handle.net/10400.26/2417.
Testo completoAbstract (sommario):
Presentemente, é uma inevitabilidade para as agências de viagens considerarem a existência da Internet na forma como realizam os negócios. E é logo na definição da estratégia a definir que a mesma deve ser considerada. O posicionamento da organização no mercado, deve ser definido como online ou offline, para que seja possível articular o produto ao mercado que se pretende atingir. O ritmo de inovação é hoje e será cada vez mais acelerado, com inúmeros reflexos nas agências de viagens, o que faz com que o enfoque seja atribuído ao cliente, onde cada vez mais se pretende satisfazer as suas exigências, assim como prever as suas necessidades. Os sistemas de informação, Intranet e Extranet ocupam nesta esfera uma importância redobrada, no sentido em que estas ferramentas são parte integrante do sucesso das agências de viagens e das organizações em geral.
A metodologia de investigação utilizada nesta dissertação, envolveu um inquérito por questionário às agências de viagens independentes e pertencentes a grupos nacionais, na ilha da Madeira. O objectivo foi avaliar a importância que atribuem às Tecnologias de Informação e Comunicação e de que forma a Internet está a influenciar o comportamento e a assessoria ao cliente.Nowadays, travel agencies acknowledge the existence of the Internet as inevitable to the way that they conduct business. It should be immediately considered in the strategy setting stages. The positioning of the organization in the market should be defined as online or offline, in order to articulate the product to the intended market. The pace of innovation is today increasingly more accelerated, with diverse effects to the travel agencies, shifting the focus to the costumer, drawing more attention to the satisfaction of their demands and also to the prediction of their needs. Information systems, Intranet and Extranet have, in this context, doubled importance since these tools are an essential part to the success of travel agencies and organizations in general. The methodology applied to this essay involves a questioning survey to travel agencies, independent or attached to larger national groups, in Madeira Island. Its main objective was to size the importance that each of these attributes to information technologies and the way that the Internet is influencing their behavior concerning the client’s assistance.
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Le, Thi Kim Cuong. "Raman spectroscopy of soot produced in low pressure flames : ex situ Analyses and Online Gas Phase Studies". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS068/document.
Testo completoAbstract (sommario):
Chaque année, une quantité de 107tonnes de suie est produite à l'échelle mondiale. Le carbone-suie dans l'atmosphère a des effets graves sur le changement climatique et la santé humaine. Les impacts dépendent de nombreux facteurs comme les composés organiques adsorbés, le vieillissement et les processus de mélange. Par conséquent, afin de réduire la quantité de suie émise, outre l'examen des facteurs mentionnés, les études de la cinétique de formation, de la structure et des propriétés optiques des suies sont également essentielles. Il existe plusieurs méthodes optiques dans les études sur la suie. La spectroscopie Raman occupe un rôle particulier puisqu'elle est un outil puissant pour l'étude structurale des matériaux carbonés grâce à sa sensibilité aux structures à l’échelle moléculaire. Dans ce travail, des sections Raman différentielles de suies et quelques autres particules carbonées ont été mesurées pour progresser vers la spectroscopie Raman quantitative de ces particules. Les suies produites par des flammes d'éthylène pré-mélangées à basse pression ont été étudiées par mesure Raman ex-situ sur des films déposés et des mesures Raman in-situ (enligne) dans la phase gazeuse. La combinaison de la spectroscopie Raman de suies échantillonnées sur substrat avec les spectroscopies infrarouge et optique et la microscopie électronique en transmission a permis de progresser sur l'interprétation des spectres Raman de suie. Les mesures en phase gazeuse, obtenues pour la première fois, fournissent de nouvelles informations sur la naissance des suies et leurs structures dans les flammes à basse pression avec, par exemple, la détection d'une grande quantité d'atomes de carbones hybridés sp lors de la formation et de la croissance des premières suies. Ces étude s’ouvrent la voie à la détection et à l'analyse des suies directement en phase gazeuse et à leur détection quantitative dans l’atmosphère au travers de leurs spectres RamanEvery year, an amount of 107 tons of soot is produced on the world scale. Soot, as part of atmospheric black carbon, has serious impacts on climate change and human health. The impacts depend on many factors including adsorbed compounds, aging and mixing processes. Therefore in order to reduce the soot amount, besides considering these mentioned factors, the study of formation kinetics, structure and optical properties is also essential. There are several methods applied in soot investigations. Raman spectroscopy plays a particular role as it is a powerful tool for structural investigation of the carbon-based materials because it is sensitive to molecular structures. In this work, differential Raman cross sections of soot and some other carbonaceous particles were measured to progress toward quantitative Raman spectroscopy. Soot particles produced by premixed ethylene flames at a low pressure were investigated by ex-situ Raman measurement on deposited films and in-situ(online) Raman measurement in the gas phase. Combination of the Raman spectroscopy of soot sampled on substrates with infrared and optical spectroscopy and transmission electron microscopy allowed progressing on the interpretation of soot Raman spectra. The online gas phase measurements provided a novel view on soot birth and structures in low pressure flames with, for instance, the detection of a large amount of sp hybrized carbon atoms during nascent soot growth. These studies pave the way to soot detection and analysis directly and quantitatively in the atmosphere
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NORONHA, Elisa Vila Nova de. "Avalia??o de medidas reol?gicas em viscos?metro online". Universidade Federal Rural do Rio de Janeiro, 2016. https://tede.ufrrj.br/jspui/handle/jspui/2145.
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2016 - Elisa Vila Nova de Noronha.pdf: 4419781 bytes, checksum: 0804df588af66f56621082802458f769 (MD5)Made available in DSpace on 2017-10-31T17:20:21Z (GMT). No. of bitstreams: 1 2016 - Elisa Vila Nova de Noronha.pdf: 4419781 bytes, checksum: 0804df588af66f56621082802458f769 (MD5) Previous issue date: 2016-12-21
For the drilling process to succeed, it is necessary the use of a drilling fluid. The measurement of rheological properties from these fluids becomes important in order to allow good hydraulic gusher maintenance and management. If these measures are taken in an on- line order that will mean agility in decision-making about the maintenance of the properties of the fluid and it will result in savings of thousands of dollars during the drilling of a well. It is in this context that this current report, developed in the UFRRJ laboratory of fluid flow, aims to evaluate the performance of a modified and calibrated process viscometer, making it a unique equipment for conducting real-time measures of apparent viscosity and thixotropy curve. The process viscometer chosen has the geometry of coaxial cylinders being, thus similar to the current workbench equipment used in drilling rigs. The modified viscometer performance was confronted with the rheometer benchtop Haake Rheostress 1. Different compositions of fluids, containing assorted concentrations of viscosifier polymers and suspension solid have been tested. The results indicated that there was an agreement on the results towards a considered error permissible for a viscometer process. The online viscometer brings a pioneering real-time measuring capacity and plotting of rheological behavior curves towards the current technology used in drilling operation.
Para que o processo de perfura??o seja bem-sucedido, ? necess?rio o uso de um fluido de perfura??o. A medi??o das propriedades reol?gicas destes fluidos torna-se importante para permitir uma boa manuten??o e gest?o hidr?ulica do po?o. Se estas medidas forem realizadas de forma online isso significar? agilidade na tomada de decis?o sobre a manuten??o das propriedades do fluido e acarretar? na economia de milhares de d?lares durante a perfura??o de um po?o. ? neste contexto que o presente trabalho, desenvolvido no Laborat?rio de Escoamento de Fluidos da UFRRJ, tem como objetivo avaliar o desempenho de um viscos?metro de processo modificado e calibrado, tornando-o em um equipamento exclusivo, para realizar medidas em tempo real de curva de viscosidade aparente e tixotropia. O viscos?metro de processo escolhido tem a mesma geometria de cilindros coaxiais sendo desta forma semelhante ao atual equipamento de bancada utilizado nas sondas de perfura??o. O desempenho do viscos?metro modificado foi confrontado com o re?metro de bancada Haake Rheostress 1. Foram testadas diferentes composi??es de fluidos contendo concentra??es variadas de pol?meros viscosificantes e s?lidos em suspens?o. Os resultados obtidos indicaram que houve concord?ncia nos resultados diante de um erro considerado admiss?vel para um viscos?metro de processo. Acredita-se que o viscos?metro online avaliado traz uma capacidade pioneira de medi??o em tempo real e plotagem de curvas de comportamento reol?gico diante da atual tecnologia utilizada na ?rea petroqu?mica.
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Mitsakis, Panagiotis [Verfasser], Hartmut [Akademischer Betreuer] Spliethoff e Frank [Akademischer Betreuer] Behrendt. "Online analysis of the tar content of biomass gasification producer gas / Panagiotis Mitsakis. Gutachter: Frank Behrendt. Betreuer: Hartmut Spliethoff". München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1019588047/34.
Testo completo
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He, Lei. "Consumer Behaviour in Collaborative Consumption : A study of sustainable consumption behavioural change on the online sharing platforms for products". Thesis, Uppsala universitet, Naturresurser och hållbar utveckling, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-404379.
Testo completoAbstract (sommario):
The urgency for a drastic reduction in greenhouse gas emission is emphasised in the new Special Report on Global Warming of 1.5 °C by Intergovernmental Panel on Climate Change, in order to maintain the security and sustainable development of humanity. As proposed in the report, changing individual consumption behaviour can considerably alleviate the environmental impact of consumption and emissions. However, transforming individual to sustainable consumption behaviour has proven over time to be a challenging task involving all aspects of the society and industry. Sharing practice is a form of collaborative consumption proven to be applicable in fulfilling user needs with minimised environmental impact and material consumption as well as creating a sustainable consumption behaviour. A case study is conducted on the online peer-to-peer stuff sharing platform to discover what challenges users to perform sharing practice, what influences the participation in sharing practice, and what strategy a platform can have to stimulate the participation in sharing practice. The method of this thesis is a qualitative content analysis of the user reviews from the online stuff sharing platform, and the approach is inspired by grounded theory. The findings of the thesis present the difficulties of platform users in sharing practice, i.e. information transparency, arrangement, quality, security, and user knowledge. Also, the findings state the factors underlying identified difficulties, namely social presence, competence in sharing practice, and platform responsibility. The study concludes with strategies that can be applied for optimising sharing practice and platform. Besides, the initiative of the platform is highlighted to create transformation toward sustainable consumption behaviour. Otherwise, the development of sharing practice can be jeopardised. Besides, further research is necessary to establish a holistic outlook of sharing practice and facilitating the transformation toward sustainable consumption.
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Vetyšková, Lenka. "On-line rezervační systémy a jejich využití v hotelovém průmyslu". Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-76130.
Testo completoAbstract (sommario):
The work focuses on the use of online reservation systems for the hotel industry. The first part is dedicated to the development of the Internet and describes the online sales. The second part describes the electronic distribution systems, global distribution systems and Internet reservation systems. The third section demonstrates the practical use of these systems in practice applied to a concrete hotel. At the end is described the current situation of on-line sales and the assumption of its development in the future. The goal is to unify the information about the online reservation systems currently used in the hotel industry.
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Södergran, Philip, e David Söderlund. "Interaktiv digital utbildning för gasansvariga inom Region Uppsala". Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448081.
Testo completoAbstract (sommario):
Background: In healthcare, it is common that personnel handle medical gases. Medical gases can be hazardous if they are handled the wrong way. The healthcare personnel needs knowledge within gas handling to eliminate the risks of mix-ups, inaccurate transportation, inaccurate change of regulators and further on. Therefore, it is essential to educate healthcare personnel in how to handle medical gases in a safe manner. Region Uppsala has been responsible for educations on-site. To make the education more accessible it is desirable to make an interactive online course, with personnel responsible for medical gases as the target group. Aim: To design a digital interactive education, with personnel responsible for medical gases as the target group. Method: Revise material from earlier education plans within gas handling, designing an interactive online course using Articulate 360 storyline and evaluate the pedagogical layout and the information in the first version of the online course. Result: It was found that an interactive online course, with personnel responsible for medical gases within Region Uppsala as the target group should contain general information about gas, medical gases with associated bottles, information about gas cylinder, regulators and their handling and security and management processes. Focus during the making of the online course was to include interactive parts and to follow the principles “Meaningful”, “Engaging” and “Accessible”. The result from the evaluation made on the first version of the education generated about ten points of improvement. Two examples of changes applied to the final version of the education was a change of color from black to white on the icons at the bottom of the layout and addition of a section about emergency shut-off valves. Conclusion: An interactive online course was produced with the purpose to educate personnel responsible for medical gases within Region Uppsala. The created online course is more accessible than the previous education available on-site and with some complementary practical elements, the online course can permanently replace the previous on-site education.
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Olofsson, Lilly. "Stuck in a loop : A project about feeling mentally stuck". Thesis, Linnéuniversitetet, Institutionen för design (DE), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96663.
Testo completoAbstract (sommario):
Combining psychology literature, social media platforms and collaboration with online communities, this visual communication project explores the experiences and struggles of people that have grown up in dysfunctional households. The intent of this project is to share stories from people who struggle with feeling mentally stuck, in order to fight the stigma surrounding mental health related issues.
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Dhahak, Asma. "Étude expérimentale de la pyrolyse de poly(téréphtalate d’éthylène) (PET) : caractérisation fine des produits et de leur cinétique de formation". Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0219.
Testo completoAbstract (sommario):
La pyrolyse est l’étape primaire de toutes les transformations thermochimiques des solides organiques et, par conséquent, la caractérisation fine des produits de pyrolyse et la compréhension des mécanismes mis en jeu sont indispensables. Dans ce contexte, cette thèse vise à étudier la pyrolyse du PET en utilisant différents appareils analytiques. Dans une première partie, des expériences de pyrolyse lente (5 °C/min) ont été réalisées dans un réacteur tubulaire pour quatre températures finales allant de 410 °C à 480 °C. Contrairement à d’autres études issues de la littérature, les produits légers mais aussi les produits lourds ont été identifiés. Les gaz non condensables ont été analysés en ligne à l’aide d’un micro-Chromatographe en Phase Gazeuse (µ-GC), ce qui a permis d’établir les profils temporels des gaz. Les composés carbonylés ont été piégés, dérivatisés et analysés par Chromatographie Liquide Haute Performance (HPLC). Les condensats ont été caractérisés par Spectroscopie Infrarouge à Transformée de Fourier (IRTF) et par Spectrométrie de Masse à Résonance Cyclotronique Ionique (FT-ICR MS) en utilisant une Ionisation par Electronébuliseur (ESI). Certaines molécules de ces condensats ont été quantifiées par Chromatographie Gazeuse/ Spectrométrie de Masse et Détection par Ionisation de Flamme (GC/MS-FID). La caractérisation du résidu solide a été réalisée par FT-ICR MS couplé avec une Ionisation Désorption Laser (LDI). Dans une seconde partie, la cinétique de formation des composés volatiles au cours de la pyrolyse de PET a été étudiée en couplant la Thermogravimétrie avec des méthodes d’ionisation douces (SPI : Single Photo Ionisation ; REMPI : Resonance Enhanced Multiple Photon Ionization ; APCI : Atmospheric Pressure Chemical Ionization). La combinaison de ces différentes techniques a permis de caractériser de façon détaillée les produits et par conséquent d’identifier les voies réactionnelles de la dégradation de PET, qui sont majoritairement des voies moléculairesPyrolysis is the primary step in all thermochemical transformations of solids and therefore the detailed characterization of the pyrolysis products and the understanding of the involved mechanisms are mandatory. In this context, this PhD thesis aims to study the slow pyrolysis of PET using different analytical devices. In the first part, slow pyrolysis experiments (5 °C/min) were carried out in a tubular reactor for four final temperatures ranging from 410 °C to 480 °C. Unlike other studies from the literature, light products as well as heavy products were identified. The non-condensable gas was analyzed online using Gas micro-Chromatography (μ-GC), which allows acquiring the gas temporal profiles. The carbonyl compounds were trapped, derivatized and analyzed by High Performance - Liquid Chromatography (HPLC). The waxy products were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and by Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) using an Electrospray Ionization (ESI). Some waxy molecules were quantified by Gas Chromatography / Mass Spectrometry and Flame Ionization Detection (GC/MS-FID). The characterization of the solid residue was performed by FT-ICR MS coupled with Laser Desorption ionization (LDI). In the second part, the formation kinetics of volatile compounds during PET pyrolysis was studied using a Thermogravimetric Analyzer coupled with mild ionization methods (SPI: Single Photon Ionization; REMPI: Resonance Enhanced Multiple Photon Ionization; APCI: Atmospheric Pressure Chemical Ionization). The combination of these different techniques allowed a detailed characterization of the products and consequently the identification of reaction pathways of PET degradation, which are mostly molecular pathways
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Ghosson, Hikmat. "Development of a novel universal proxy to assess the environmental fate and impact of complex (bio)pesticides by Mass Spectrometry-based Metabolomics". Electronic Thesis or Diss., Perpignan, 2020. http://www.theses.fr/2020PERP0029.
Testo completoAbstract (sommario):
Malgré la prise de conscience écologique et sanitaire, la consommation mondiale de pesticides est en augmentation. Étant donné que ces produits chimiques présentent de nombreux effets néfastes sur la santé humaine et l'environnement, des mesures doivent être prises afin de limiter leurs effets. Les produits de biocontrôle sont proposés comme une solution alternative aux produits synthétiques. En effet, ces « biopesticides » sont présumés être moins nocifs et relativement moins persistants. Toutefois, cet a priori doit être examiné et une évaluation stricte des risques de ces nouvelles substances doit être envisagée.Le développement de solutions de biocontrôle passe d'abord par les protocoles proposés pour étudier leur activité, leur devenir et leur impact environnemental. Actuellement, le temps de demi-vie (t½) est utilisé pour évaluer le devenir environnemental des pesticides synthétiques. Cependant, l'approche t½ ne donne que des informations sur la persistance des pesticides dans l'environnement, mais aucune indication concernant la formation de produits de dégradation ou son impact sur la biodiversité n'est apportée. De plus, les produits de biocontrôle sont des mélanges (bio)chimiques complexes. La t½ n'est pas applicable pour ces produits complexes. Par conséquent, de nouvelles approches analytiques doivent être envisagées afin de surmonter ces difficultés.Une nouvelle approche basée sur la méta-métabolomique et la Spectrométrie de Masse; « Empreinte Métabolique Environnementale » (EMF), a été récemment introduite. Elle offre un nouveau proxy universel et intégratif; le « temps de résilience », dédié à l'évaluation du devenir environnemental et de l'impact des (bio)pesticides complexes dans des matrices environnementales (ex. sol, sédiments). Néanmoins, le développement d'une telle approche de méta-métabolomique non ciblée basée sur la Spectrométrie de Masse doit être étudié en profondeur. Plusieurs tâches doivent alors être abordées: 1) les protocoles d'extraction performants et les méthodes analytiques basées sur la GC/LC-(HR)MS doivent être mis en place, 2) le traitement de données et les outils chimiométriques appropriés doivent être développés pour maitriser la complexité des ensembles des données générées, 3) l'impact de la complexité du xénométabolome sur les analyses basées sur la MS doit être évalué, et 4) l'étude des résidus volatiles doit être envisagée et nécessite donc le développement de nouvelles méthodologies analytiques.Le travail a été mené sur 3 axes principaux. Le premier axe portait sur 1) le développement de protocoles d'extraction et des méthodes LC-HRMS pour analyser à la fois les xénométabolites des pesticides et les endométabolites du sol, et 2) le développement d'une nouvelle approche chimiométrique pour évaluer les performances d'extraction. De nouveaux protocoles d'extraction se sont avérés optimaux pour l'EMF, et l'approche chimiométrique a donc été validée. Le deuxième axe a évalué l'impact de la complexité du xénométabolome sur la détermination des biomarqueurs environnementaux. La suppression d'ion a été révélée et une stratégie pragmatique a donc été élaborée pour surmonter son influence. Le troisième axe visait à mettre en place une nouvelle méthodologie pour analyser les résidus volatils de pesticides complexes. Des analyses HS-SPME-GC-MS ont été couplées à la chimiométrie afin de réaliser des études cinétiques et de suivre la transformation des résidus volatils. Le workflow chimiométrique a prouvé sa fiabilité pour expliquer la transformation du pesticide et de nouveaux xénométabolites et sous-produits ont été identifiés.En conclusion, une avancée significative a été apportée à l’EMF. Elle a été consolidée pour les applications en laboratoire et sur le terrain qui doivent être étudiées afin d'améliorer le proxy et de le valider comme une approche fiable pour l'évaluation des risques des pesticidesDespite the ecological and sanitary awareness, worldwide consumption of pesticides is increasing. As these chemical products represent several adverse effects on human health and environment, measures should be taken in order to limit their impacts. Biocontrol products are proposed as an alternative solution of the synthetic products. In fact, these “biopesticides” are presumed to be less harmful and relatively less persistent. However, this a priori must be examined and strict risk assessment of those new substances should be considered.The development of biocontrol solutions proceeds first of all through the proposed protocols to study their activity and their environmental fate and impact. Currently, half-life (DT50) is used in order to evaluate the environmental fate of synthetic pesticides. However, DT50 approach gives only information about pesticides' persistence in the environment, but no indications concerning the formation of degradation products or its impact on biodiversity are provided. Furthermore, biocontrol products are complex (bio)chemical mixes. The DT50 is not applicable for such complex products. Therefore, novel analytical approaches should be considered in order to overcome these difficulties.A novel approach based on meta-metabolomics and Mass Spectrometry; the “Environmental Metabolic Footprinting” (EMF), was recently introduced. It affords a novel universal and integrative proxy; the “resilience time”, dedicated to assess the environmental fate and impact of complex (bio)pesticides in environmental matrices (e.g. soil, sediment). Nonetheless, the development of such Mass Spectrometry-based untargeted meta-metabolomics approach needs to be in-depth studied. Several tasks should be addressed: 1) performant extraction protocols and GC/LC-(HR)MS-based analytical methods should be set up, 2) suitable data processing and chemometric tools should be developed to deal with the complexity of the generated datasets, 3) the impact of xenometabolome complexity on MS-based analyses should be assessed, and 4) the study of the volatile residues should be considered and thus needs new analytical methodologies to be developed.The work was carried out following 3 main axes. The first axis addressed 1) the development of extraction protocols and LC-HRMS methods to analyze both pesticides xenometabolites and soil endometabolites, and 2) the development of a novel chemometric approach to assess the extraction performance. Novel extraction protocols have been proven optimal for the EMF, and the chemometric approach was thus validated. The second axis assessed the impact of xenometabolome complexity on the determination of environmental biomarkers. Ion suppression was revealed and thus a pragmatic strategy has been developed to overcome its influence. The third axis aimed to set-up a novel methodology in order to analyze the volatile residues of complex pesticides. HS-SPME-GC-MS analyses were coupled to chemometrics in order to perform kinetics studies and to follow the transformation of the volatile residues. The chemometric workflow proved its reliability to explain pesticide’s transformation and novel xenometabolites and by-products were identified.In conclusion, significant advances were carried to the EMF. It has been consolidated for laboratory and field applications that must be investigated in order to improve the proxy and to validate it as a reliable approach for pesticides risk evaluation
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Német, Kryštof. "Webová aplikace zobrazující toky dat mezi objekty na generované online mapě". Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-428787.
Testo completoAbstract (sommario):
Német, K., Web application displaying data flows between objects on generated online map. Brno: Mendel University, 2019. This diploma thesis is about creation of a map interactive presentation in the form of web applications for data visualization on the map. The application is created for academical purposes, especially for future research of visualization on the map. The theoretical part describes the basic concepts and technologies used in map applications and description of used technologies and technical tools used during implementation. The practical part describes application design, data storage and application testing. At the end of this thesis is discussed, possible application extension and application applicability in practice.
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Chudiwale, Varun. "Development of processes for online GIS data selection, extraction, and aggregation using ArcIMS and .Net technology". 2005. http://digital.library.okstate.edu/etd/umi-okstate-1534.pdf.
Testo completo
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Ball, Kendall C. "A CASE STUDY ON USING GIS AS A TOOL TO ENABLE LEARNING OF SPATIAL PROBLEM SOLVING ABILITIES IN AN ONLINE ENVIRONMENT". 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-265.
Testo completo
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Howard, Daniel C. "Online public participation GIS. Shaping the scales and spaces of comprehensive planning A case study on the use of geographic information systems on the Web to support comprehensive planning in the town of Amherst, New York /". 2006. http://proquest.umi.com/pqdweb?did=1059997571&sid=6&Fmt=2&clientId=39334&RQT=309&VName=PQD.
Testo completoAbstract (sommario):
Thesis (Ph.D.)--State University of New York at Buffalo, 2006.Title from PDF title page (viewed on July. 21, 2006) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Mark, David. Includes bibliographical references.
30
Tsai, Shiao-Yun, e 蔡曉雲. "Online Analysis of Gas Composition for Explosion Tests at Elevated Pressure". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/70630989658205088650.
Testo completoAbstract (sommario):
碩士國立高雄第一科技大學
環境與安全衛生工程所
92
ABSTRACT In this study, an online gas measurement system is developed to measure the gas composition before and after explosion tests. This system uses an auto-sampling system to sample gases into a gas chromatography coupled with thermal conductivity detector (TCD) which capable of qualitative and quantitative analysis. The data will be useful for determine the flammability limits and the relationship between composition change and explosion pressure rise. In the explosion testing system, the pressure balancing and double containment vessel design is adapted. With an igniter, a premix vessel, and a fast data acquisition system, the system is a simple and safe apparatus that is capable of testing explosion at elevated pressures. In the analytical system, a gas sampling line is first connected from the explosion system to a buffer to reduce pressure and confine flow rate. The sampled gas is routed to a gas feed valve. The valve alternates the sampled gas into two different columns, PLOT-Q (Porous layer open tubular column - 30m×0.53mm) and PLOT-5A (Molecular sieves 5Å-30m×0.53mm), for separating all gases before entering the TCD. This online system is validated to have linearity greater than 0.9950 for CO, CO2, O2, and CH4. Accuracy was within 101.4±8.7〜105.4±5.9%. Precision was within 2.9- 4.3%. The method detection limit was found to be around 0.01%. The whole system is validated with different sources of gases and its reliability is found to within 99-106 %. Explosion tests for CO/CH4 (2:8 mixture) and pure CH4 were performed at pressure of 0.6 MPa. It is found that the upper flammability limits of CO/CH4 (2:8) mixture and pure CH4 lie at air concentration of 75.8% and 78.5%, respectively. Small pressure rises were found in CO/CH4 tests where small amount of CO2 were also found but their concentrations were less than quantifiable range (QDL<0.1%). Furthermore, there is no CO formed in these tests. It is suspected that the small pressure rise was a localized reaction of methane around the fusing ignition wire rather than a partial oxidation of methane. Insufficient oxygen prevents the reaction to propagate into the bulk gases. Thus, it is concluded that the cool flame be excluded from the definition of upper flammability. For air concentration greater than 76.00%, the explosion tests generated significant overpressure, which also showed significant CO and CO2 generation, indicating true combustion. Repeating analysis of gases from explosion testing showed all data falling into 2.90-3.51% range. This indicates this online analysis system is reliable, fast and applicable to explosion testing.
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Wu, Shin-Rong, e 吳炘融. "Criticality and burnup analysis of online refueling process in pebble-bed high temperature gas-cooled reactor". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/68ry5s.
Testo completo
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Lin, Jui-Cheng, e 林瑞承. "Feasibility Evaluation of the Calibration of Gas Turbine Online Fuel Flowmeter in Natural Gas Power Plant-A Case Study of Gas Turbine Unit in Combined Cycle Power Plant". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/84g5qj.
Testo completoAbstract (sommario):
碩士中原大學
電機工程研究所
105
As an idiom, “a miss is as good as a mile”, it is the best description for how tiny errors lead to extreme inaccuracy of measurement. This study lists various kinds of gas flowmeters commonly used in Taiwan, explains their mechanisms, enumerates their differences, and introduces the standards of measurement issued by institutes in different countries as references to gas flow measurement. The power plant in our study uses a differential pressure flowmeter, which measures volumetric flow. The operating procedures included the inspection of the natural gas flow system in the power plant and each component of the gas flowmeter in the generator set. Calibration of the flow meter, in which the flowmeter shall be used as the test piece, was performed based on the methods proposed by the Instrument Society of America (ISA). Because of the difficulties and safety concerns of disassembling the flowmeter and sending to other domestic laboratories for calibration, the Coriolis force mass flowmeter was used as a standard meter and was connected in series to the flow meter in the generator set to measure the true flow. With the fact that mass flowmeters have characteristic of not being affected by the environment of pipelines, the data of the component of natural gas was collected by the Gas Chromatography (GC) in the power plant, the density of natural gas was calculated based on the standard of American Gas Association (AGA) 8, and the mass flow of the standard meter was converted into the referred volume flow. However, since the power plant was in operation and the standard meter cannot be installed on the pipeline. The data of actual operations was collected instead for analysis in this study. Through the internal Reynold Number vs Discharge Coefficient (Re vs Cd) table, and AGA 3 calculation function, the gradual corrected results of test meter can be simulated in order to reach the correction target.
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Ye, Guan-Fu, e 葉冠甫. "Online monitoring of the concentration levels of gases during fermentation process by gas chromatography/whistle detection technique". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/04557319314845213328.
Testo completoAbstract (sommario):
碩士國立臺灣師範大學
化學系
103
This study was conducted to a general understanding of the use of a milli-whistle as a gas chromatography (GC) detector in gas analysis.The milli-whistle is connected to the outlet of a GC capillary, and when the eluted gases and the GC carrier gas pass through it, a sound with a fundamental frequency is produced. The sound wave can be picked up by a microphone, and after a fast Fourier transform, the online data obtained for frequency-change vs. retention time constitute a new method for detecting gases with LabVIEW(Laboratory Virtual Engineer Workbench).In order to improve the efficiency of fermentation, in this study, yeast strain, Saccharomyces cerevisiae, using electrostatic spinning technology coated inside to the PLLA (poly-L-lactide; PLLA) microtubule arrays film. Yeast activated in film will not be affected. The film can be recycled and continue to use, reduce the cost of making ethanol. In this study, the fermentation broth and yeast that has been coated inside to fibers put into the container together to ferment. Using of program control self-assembled solenoid valve, the fermentation process produces ethanol and carbon dioxide vapors, etc., at 5-minute intervals, automatically injected into the capillary column to separate and record. Experimental results show that the use of our developed device, we can immediately detect and track fermentation. The experiment apparatus can detect at least 4 days with fully automated. According to the amount of change in frequency, it can instantly detect the concentration of ethanol that is in fermentation broth。
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Lin, Chien-Hung, e 林建宏. "The Use of an Accelerometer and a Microphone as Gas Detectors in the Online Quantitative Detection of Hydrogen Released from Ammonia Borane by Gas Chromatography". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/88335114188997708190.
Testo completoAbstract (sommario):
碩士國立臺灣師範大學
化學系
101
The use of an accelerometer as a gas detector in gas chromatography (GC) is described for the first time. A milli-whistle was connected to the outlet of the GC capillary. When the eluted and GC carrier gases pass through the capillary and milli-whistle, a sound is produced. After a fast Fourier transform (FFT), the sound wave generated from the milliwhistle is picked up by a microphone and the resulting vibration of the milliwhistle body can be recorded by an accelerometer. The release of hydrogen gas, as the result of thermal energy, from ammonia borane (NH3BH3), which has been suggested as a storage medium for hydrogen, was selected as the model sample. The findings show that the frequencies generated, either by sound or by the vibration from the whistle body, were identical. The concentration levels of the released hydrogen gas can be determined online, based on the frequency changes. Ammonia borane was placed in a brass reservoir, heated continually, and the released hydrogen gas was directly injected into the GC inlet at 0.5 min intervals, using a home-built electromagnetic pulse injector. The concentration of hydrogen for each injection can be calculated immediately. When the ammonia borane was encapsulated within a polycarbonate (PC) microtube array membrane, the temperature required for the release of hydrogen can be decreased, which would make such a material more convenient for use. The findings indicate that 1.0 mg of ammonia borane can produce hydrogen in the range of 1.0−1.25 mL, in the temperature range of 85−115 °C.
35
Azcue, Thomas Rodrigo Sande Lemos. "LANA business plan: e-marketplace for service providers". Master's thesis, 2019. http://hdl.handle.net/10071/20034.
Testo completoAbstract (sommario):
In today's digital age there are new approaches and tools to address different social issues, and this market gap is not an exception. Currently, the process of matching supply and demand of these general services is cumbersome for both parties. Despite the existence of tools such as social media, there have been very rare cases of clear success, and no clear solution in the Portuguese market.
After an initial and preliminary market analysis, a clear gap was identified between general service providers (e.g. electricians, plumbers, babysitters, house cleaning, etc.) and consumers of those services. Once this gap was identified, a thorough analysis of the situation was done and, from this analysis, the idea to develop a platform that helps link these two groups allowing them to easily access each other was born.
The idea behind LANA is of an online platform (mobile app or website) where people can post the services they need provided and suppliers can cater to these needs. Therefore, the proposed project in LANA's Business Plan is an innovative business solution based on the observed market and behavioral trends. The increase in popularity of the sharing and gig economy is a clear opportunity and, aligned with the digital growth that is currently taking place, a differentiating offer can be launched onto the market.
The project consists of the development of the marketing and operations components of the business. In the financial analysis, three different scenarios were evaluated in order to evaluate the possible levels of success.
The developed model proves the economic viability of the project, indicating it is a project worthy of investment.A atual época digital oferece cada vez mais abordagens e ferramentas para abordar questões sociais, e este caso não é exceção. Atualmente, o processo de satisfazer a procura e oferta destes serviços gerais é uma tarefa pesada para ambos os participantes. Apesar da existência de ferramentas como as redes sociais, são raros os casos bem-sucedidos e não existe nenhuma solução clara no mercado Português. Uma primeira análise do mercado conduziu à identificação de um hiato no que concerne ao acesso facilitado entre os prestadores de serviços (e.g. eletricistas, canalizadores, baby-sitters, serviços de limpeza, etc.) e os consumidores desses mesmos serviços. Uma vez identificada esta lacuna, foi desenvolvida uma análise aprofundada da situação em causa, da qual surgiu a ideia de desenvolver uma plataforma que ajude a unir as duas partes, diminuindo o espaço que as separa. A ideia de fundo da LANA é uma plataforma online (aplicação móvel ou website) onde as pessoas podem expor os serviços que precisam que sejam prestados e os prestadores podem satisfazer essas necessidades. Desta feita, o projeto proposto no plano de negócios da LANA é uma solução inovadora que tem como base as tendências de mercado e comportamentais observadas. O aumento da popularidade do conceito de economia partilhada é uma oportunidade evidente que, alinhada com o atual crescimento, torna esta uma oferta diferenciadora que pode ser lançada no mercado. O projeto consiste no desenvolvimento das componentes operacionais e de marketing do negócio. Na análise financeira, são detalhados três cenários distintos para que se possa observar os diferentes níveis de potencial sucesso. O modelo proposto comprova a viabilidade financeira do projeto, indicando assim que se trata de um projeto merecedor de investimento.
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Grigore, Vlad. "What results from a program designed to facilitate the reduction of the environmental footprint of the employees of an oil and gas company in Calgary, Alberta?" 2010. http://hdl.handle.net/10170/376.
Testo completoAbstract (sommario):
Employees at Statoil Canada participated in an action research, cooperative inquiry-based program that was designed to facilitate the reduction of their office environmental footprint. The program was designed using a combination of techniques that have been shown in previous studies to produce pro-environmental change. Almost 90% of participants that were offered the program opted to take part. During a 4-month period, participants set up individualized programs to reduce their environmental footprint in a manner of their own choosing. Results were collected both formally, through self-report data from a web-based Action Tracker, through 1 on 1 interviews and through a facilitated discussion and informally, through impromptu conversations, emails and observation. The data suggests that the program was effective in reducing environmental footprint, although it remains to be seen if the changes will be long lasting.