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Steffensmeier, Gary. "Teachers’ pedagogical beliefs about using computing devices in one-to-one technology initiative schools." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2280.
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Using a qualitative multiple case study design, this study investigated the ways that teachers’ pedagogical beliefs about learning: 1) affect students’ access to and use of one-to-one technologies and 2) shape one-to-one learning environments. Results indicate that teachers’ pedagogical beliefs are not a predictor of student access to computing devices, but do impact how students use the devices in the classroom. Also, teachers’ use of technology resources reflects their pedagogical beliefs. Teachers in the study reported that the increased access to technology via a one-to-one program positively impacted the learning environment by: facilitating better communication with students; empowering students; providing better feedback to students; making the teachers’ job easier; providing teachers and students with better access to resources; allowing more ways to differentiate student learning; developing 21st century technology skills; providing variety; and helping motivate students to learn. Teachers’ perceived negative impacts of the one-to-one program centered on the difficulties of shifting to new classroom management methods that accommodate technology devices and the distractions associated with the computing devices. Teachers also reported that they need better professional development to successfully integrate technology into their classrooms. Future professional development for one-to-one programs should be directed towards developing student-centered pedagogies with a focus on collaboration and integration of technology into the educational curriculum.
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Theis, Jennifer Lee. "Technology predictors of inquiry-based teaching: an examination of two k-12 1:1 pilots." Bowling Green State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1460056561.
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Jacob, Johnson Kulangara. "Teachers' Perceptions of a One-to-One Teacher Laptop Program and Teacher Technology Efficacy." ScholarWorks, 2020. https://scholarworks.waldenu.edu/dissertations/7876.
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Schools all over the world are embracing technology because they view technology as a catalyst to improve teaching and learning, leading to further investment in technology initiatives for school improvement. The 1:1 teacher laptop program is one such initiative that continues to gain interest and momentum. Despite widespread adoption, teachers continue to face challenges with the use of technology. Furthermore, while research has indicated that teacher technology efficacy is a significant enabling factor for technology use, there is limited evidence for how the 1:1 teacher laptop program has influenced teacher technology efficacy. The purpose of this qualitative pragmatic study was to describe the perceptions and experiences of teachers who participated in a 1:1 teacher laptop program at an international school in relation to teachers' technology efficacy. The study was framed through the model of adult learning proposed by Knowles and the construct of self-efficacy posited by Bandura. Thematic analysis was used to analyze data. Findings from this study identified 7 overarching themes: access to the teacher laptop, change in practice, support structures, concerns and barriers, attitude towards technology, self-directed learning, and perceived value. Interpretations revealed that while participants were positive about the program and acknowledged that the program helped raise their technology efficacy, participants also shared concerns. This study adds to the body of knowledge for an understudied topic and provides teachers a voice to influence implementation fidelity. This study also contributes to social change by adding a global perspective through experiences at an international school to inform school leaders to prepare teachers to use technology effectively to improve student learning.
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Håkansson, Lindqvist Marcia. "Conditions for Technology Enhanced Learning and Educational Change : a case study of a 1:1 initiative." Doctoral thesis, Umeå universitet, Pedagogiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-109887.
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The uptake and use of digital technologies continues to increase in schools throughout the world. In many schools the uptake and use of digital technologies takes place in One-to-One (1:1) initiatives in which teachers and students have their own laptops. In this thesis the uptake and use of digital technologies is studied from the student, teacher and school leader perspectives in order to through this gain knowledge regarding the conditions for Technology Enhanced Learning (TEL) and educational change in K-12 schools. In the Unos Umeå research project the uptake and use of digital technologies in two schools, an upper secondary school and a compulsory school, was studied. A research design involving a case study approach (Yin, 2003, 2009) was used to study a 1:1 initiative. The methods of data collection were surveys, interviews and classroom observations. To explore, identify and describe conditions for TEL and educational change the data collected were used to map the initial expectations regarding the uptake and use of digital technologies from the start of the initiative as well as to follow the development of teaching and learning activities related to the uptake and use of digital technologies in the 1:1 classroom over a period of two years. The Ecology of Resources Model (Luckin, 2010) was used as a theoretical framework including the use of the concept of filters. Regarding the conditions for TEL, the results show that the uptake and use of digital technologies provides possibilities for new forms of teaching and learning in the 1:1 classroom. Students reported increased motivation, engagement and variation in schoolwork. Teachers described new forms of teaching as well as possibilities for collaboration, sharing of materials and continued professional development. For school leaders possibilities were found in collaboration, administrative support and follow-up of students and teachers, creating a unified vision of the work with digital technologies, and collaboration and sharing within the schools as an ecology of resources. The challenges seen from the student, teacher and school leader perspectives were related to use, technical support and optionality. If the possibilities are to be achieved, there is a need for continued professional development for teachers and school leaders. Further, clear directives through policy will be of importance. In the short term, the practical implications of the uptake and use of digital technologies, specifically in 1:1 initiatives, seem to be strongly connected to sustainability in schools. In the long term, if sustainable conditions for TEL and educational change in the 1:1 classroom can be created and upheld, the practical implications may for example be teachers’ improved skills to integrate a thought-through student use of laptops in their teaching practices and an increase in equality of digital competence between students, between schools and between classrooms in the same school.
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Young, William F. "1:1 Laptops in Education and Achievement Test Results in One Rural High School." Youngstown State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1491645288787764.
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Perry, Nicholas D. Perry. "Teacher attitudes and Beliefs about Successfully Integrating Technology in their Classroom During a 1:1 Technology Initiative and the Factors that Lead to Adaptations in their Instructional Practice and Possible Influence on Standardized Test Achievement." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1522233676292274.
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Rizzo, Susan Kay. "Making the Shift: A Phenomenological Study of Teachers' Experiences in a Student-Centered, 21st Century Laptop Program." NSUWorks, 2013. http://nsuworks.nova.edu/gscis_etd/290.
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As one-to-one laptop environments are becoming more commonplace in the educational system, teachers are often expected to provide a student-centered environment that incorporates 21st century skills in effort to better prepare students for the future. Teaching in this type of environment is a difficult pedagogical shift for classroom educators. The assumption is often made that teachers can make this pedagogical shift just because laptops are provided for all students.
The goal was to capture the essence of the lived experiences of fifth grade teachers who will be immersed in the phenomenon of teaching in a student-centered, twenty-first century, one-to-one laptop environment. The overarching research question was: What is the essence of the lived experiences of teachers who are implementing a student-centered, 21st century, one-to-one laptop pilot?
Guided by phenomenology using a transcendental approach, data were collected through multiple, in-depth teacher interviews. The research process included identification of the phenomenon; epoché; data collection through 18 interviews with nine fifth-grade teachers; and transcendental phenomenological analysis through reduction, imaginative variation, and syntheses. Reduction involved horizonalization of the data and the development of textural and structural descriptions of the teachers' experiences. In addition, thirty-four codes were identified and reduced to six overarching themes including: looking back, engaged and excited, building a solid foundation, roles have shifted, consider this, and learning the 21st century way.
The results will help in the development of effective academic and technology support structures that strengthen a student-centered, 21st century, one-to-one laptop program. The investigation exposed themes of difficulties, strategies, and best practices that teachers experience during the implementation.
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Walters, Meghan Gail. "Elementary Educators' Knowledge, Beliefs, and Planned and Implemented Practices for Digital Citizenship." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/6291.
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Limited research has focused on the knowledge, beliefs, and professional practices of elementary educators related to digital citizenship. The purpose of this study was to identify elementary educators' knowledge and beliefs about digital citizenship, as well as understand their plans and implemented practices, supports, and barriers related to digital citizenship instruction. This study was grounded in Mezirow's theory of transformative learning, Siemen's theory of connectivism, and Ribble's concept of digital citizenship. Descriptive statistics were used to analyze data collected from an original survey instrument developed from the literature by the researcher. Participants were recruited using publicly accessible email addresses and the monthly newsletter from Hawaii Society for Technology Education; a total of 74 educators completed the survey. All educators in the district who met the demographic criteria of working at the elementary level as a teacher, curriculum coordinator, or technology coordinator were welcome to participate in the study. Data were analyzed for frequencies and percentages to develop generalized statements about the population. The results indicated, on average, that educators rated themselves with high knowledge and beliefs about digital citizenship concepts with the exception of digital law. Additionally, correlational analysis revealed schools with greater adoption rates of 1:1 technology-device integration had a significant impact on professional practices in digital citizenship implementation and overall instructional practices. This research study contributes to positive social change by helping educational leaders identify what is needed to support educators in teaching with digital citizenship, and especially in supporting those educators in schools which are further behind in adopting 1:1 technology integration.
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Saadaoui, Safa. "Conception d'un système de communication sans fil industriel basé sur la transformée en ondelettes." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0048/document.
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Dans cette thèse, nous présenterons une architecture de communication multi-utilisateurs à base des réseaux de capteurs sans fil dans un environnement industriel fortement bruité. Deux modes de fonctionnement de cette architecture sont présentés ; un mode Many-To-One reliant plusieurs capteurs émetteurs à un seul récepteur et un mode One-To-Many reliant un émetteur à plusieurs capteurs récepteurs. La couche physique de ce système est basée sur une modulation par transformée par paquets d'ondelettes inverse (IDWPT) à l'émission et une transformée par paquets d'ondelette discrète (DWPT) en réception. Pour tester notre architecture, un modèle de canal industriel est proposé qui tient compte des phénomènes des multi-trajets et des évanouissements en plus du bruit additif. Ce dernier étant modélisé comme un bruit gaussien auquel s'additionne un bruit impulsionnel causant une dégradation significative des signaux. L'architecture est testée pour différentes configurations de communications sans fil et pour différentes formes d'ondelettes afin de proposer un mode de communication optimal. Aussi, une amélioration de la robustesse de notre système est effectuée en ajoutant un codage correcteur d'erreur du canal et un seuillage du bruit impulsionnel à la réception pour minimiser les effets du bruit industriel sur les signaux reçus. En utilisant un code correcteur d'erreur, la détection et reconstitution des signaux se fait sans erreur à partir d'un SNR de 8dB pour un taux de codage 1/4 pour une transmission sur à canal à évanouissement. Pour un récepteur optimal à base du seuillage du bruit, les performances en termes de taux d'erreur binaires sont améliorées de 10dB pour une transmission sur un canal à bruit industriel. Enfin, une comparaison de la robustesse de notre architecture impulsionnelle avec un système à base d'une modulation multi-porteuse classique OFDM est effectuée. Ceci nous amène à proposer un système de communication multi-utilisateurs robuste à base des réseaux de capteurs sans fil pour des communications en milieu industriel difficileIn this thesis, we will present a multi-user communication architecture based on wireless sensor networks in a noisy industrial environment. Two modes of operation of this architecture are presented ; a Many-To-One mode linking several transmitter sensors to a single receiver and a One-To-Many mode linking a transmitter to several receiver sensors. The physical layer of this system is based on the inverse transform (IDWPT) at transmission and the discrete wavelet packet transform (DWPT) at reception. To test our architecture, an industrial channel model is proposed that takes into account the phenomena of multipath and fading in addition to additive noise. The latter being modelled as Gaussian noise to which is added an impulse noise causing significant signal degradation. The architecture is tested for different wireless communication configurations and wavelet shapes to provide an optimal communication mode. Also, an improvement in the robustness of our system is achieved by adding channel error correction coding and pulse noise thresholding at reception to minimize the effects of industrial noise on the received signals. Using an error-correcting code, the detection and reconstruction of signals is error-free from an SNR of 8dB for a coding rate of 1/4 for transmission on a fading channel. For an optimal receiver based on noise thresholding, the performance in terms of binary error rates is improved by 10dB for transmission over an industrial noise channel. Finally, a comparison of the robustness of our pulse architecture with a system based on a conventional OFDM multi-carrier modulation is carried out. This leads us to propose a robust multi-user communication system based on wireless sensor networks for communications in difficult industrial environments
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Ener, Alptekin Emel. "Anaerobic Treatment Of Dilute Wastewaters." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609461/index.pdf.
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In this study, domestic wastewater was used to determine the anaerobic treatment performances of a dilute wastewater in one-phase upflow anaerobic sludge blanket (UASB) system and two-phase upflow anaerobic filter (UAF) and UASB system. The acidification performances of domestic wastewater were compared in UAF and UASB reactors. The degree of acidification is higher in UAF reactor (31%) compared to UASB reactor (18%) at 2 h hydraulic retention time (HRT) in the anaerobic treatment of domestic wastewaters. The effluent total volatile fatty acid (tVFA) concentration was higher in UAF reactor than that the UASB reactor at 2 h HRT. The total chemical oxygen demand (tCOD) removal is 40% in winter and 53% in summer in UAF reactor at 2 h HRT. The tCOD removals in two-phase UAF and UASB system and one-phase UASB system were 83% and 63%, respectively, in 4 h HRT. The conversion rate of COD removed to methane were between 0.005 and 0.067 Nm3 methane/kg COD removed and between 0.158 and 0.233 Nm3 methane/kg COD removed in the UAF and the UASB reactor of the two-phase system, respectively. The conversion rate of COD removed to methane varied between 0.029 and 0.199 Nm3 methane/kg COD removed in one-phase UASB reactor. The results of this study showed that the two-phase reactor system consisting from UAF and UASB reactors provide a good removal of soluble organics variations in acidification reactor and better methane productions in UASB reactor at temperatures 20°C and 35°
C through the treatment of domestic wastewater at a HRT of 4 hours.
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Slevin, Keith Martin. "Electrons in disorded one dimensional systems." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47666.
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Huang, Shih-Huang. "Synthesis and characterization of 2-chloro-3-benzylthiopyrrolo[1,2-a]- benzimidazol-1-one and 2,3-di(benzylthio)pyrrolo[1,2-a]benzimidazol-1-one." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4415/.
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The reaction between o-phenylenediamine and 2,3-dichloromaleic anhydride has been probed and found to give 2,3-dichloropyrrolo[1,2-a]- benzimidazol-1-one as the major product. Chlorine substitution in 2,3-dichloropyrrolo[1,2-a]benzimidazol-1-one by added benzylthiol occurs in the presence of pyridine to provide the corresponding monosulfide and disulfide derivatives. The first benzylthiol ligand undergoes reaction at the C-3 position of the five-membered pyrrolo-1-one ring, with the addition of the second benzylthiol ligand occurring at the remaining chlorine-substituted carbon. The mono- and disulfide derivatives have been isolated and characterized in solution by NMR, IR, and UV-vis spectroscopies, and the solid-state structure of 2,3-di(benzylthio)pyrrolo[1,2-a]benzimidazol-1-one has been established by X-ray crystallography.
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Ali, Mohamad Azlin. "One-dimensional modelling of hydrate formation in pipelines." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25506.
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Hydrate formation in oil and gas pipelines can be troublesome and often, without a proper remediation, the formation of hydrates can lead to a pipe blockage. As hydrate formation is a non-isothermal process, the modelling of the thermodynamic behaviour of the phases within the flow is proposed. A single energy equation has been formulated and verified with parametric analyses. A new hydrate kinetics routine, based on a two-step hydrate formation mechanism, in an oil-dominated flow is proposed. The first step involves the mass transfer of gas from the free gas phase into the oil (gas dissolution rate) and the second step is the mass transfer of the dissolved gas into the water (gas consumption rate). Suitable models in the form of transport equations for each mechanism, together with appropriate closure relations to account for the agglomeration of hydrate particles and hydrate slurry viscosity, are formulated. Both the energy equation and the hydrate kinetics routine were integrated into an existing in-house research code, TRIOMPH (Transient Implicit One-Dimensional Multiphase). The model was tested and validated against two flow loop experiments, and has shown good agreement. Advancement over the only other existing model in predicting hydrate formation in the heavily slugged hypothetical pipe, has also been shown, giving the current model versatility in simulating both slug and non-slug cases.
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Cottam, Ben Francis. "The synthesis of one-dimensional titanium oxide nanostructures." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11985.
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My work has been focussed on the synthesis of titanium oxide (Ti02) nanostructures. Commercially available Ti02 is widely used in applications such as self-cleaning surfaces, water purification devices and solar cells. However, a new generation of Ti02particles offers high crystallinity, monodispersity, and well defined . geometry. High aspect ratio particles are likely to offer advantages in terms of transport properties and accessibility to other phases. I have investigated three distinct strategies for the preparation of Ti02 nanorods. The first involves a hydrolysis of titanium tetraisopropoxide (TrIP), with oleic acid as a surfactant, which prodUces anatase Ti02nanorods of -3 nm diameter and -30 nm in length. This reaction was performed both on the bulk seale, with a standard flask and manifold set-up, and also in the highly controlled environment of microfluidic chips. The use of continuous-flow, microfluidic devices confers several advantages over conventional macroscale techniques, including high surface area-ta-volume ratios and reduced diffusional dimensions. Our studies show a roughly ten-fold increase in reaction rate when the hydrolysis is performed onchip, as opposed to in a flask. As an alternative, a non-hydrolytic synthesis of Ti02nanorods was performed, via the reaction of TrIP and TiCI 4 in the presence of oleic acid. The non-hydrolytic reaction provides scope for higher reaction temperatures, different surface functionalities, and different reaction rates. The anatase nanorods obtained were -S nm in diameter and -SO nm in length. The reaction conditions (time of reaction, temperature, mode of addition of TiCI4) were optimised for purity, crystallinity and monodispersity. The third synthetic technique relied on the conversion of aligned multi-walled carbon nanotubes (MWCNTs) into rutile Ti02nanorods. The MWCNTs were grown via a standard CVD process in which a -3% ferrocenein xylene solution is gradually pumped into a quartz tube at -760��?���°C. The MWCNTs were then reacted with a volatile titanium iodide, generated in situ, at high temperature (800 -1200 ��?���°C) and reduced . pressure, to produce titanium carbide (TiC) nanorods with similar dimensions. Oxidation of the TiC at 800��?���°C, converts it to rutile Ti02nanorods. The resulting nanostructures are -SO nm in diameter and up to -SOO /-1m in lellgth, and composed of pure, polycrystaJline rutile .The process preserves the unidirectional alignment of the original nanotubes, which may be useful for applications.
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Bonizzi, Marco. "Transient one-dimensional modelling of multiphase slug flows." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/8746.
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Freddi, Giovanni. "One-pot Butyl Levulinate Production from Fructose and 1-Butanol." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16744/.
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Nowadays fossil fuels such as coal, petroleum, and natural gas provide more than three quarters of the world`s energy. They are also used to produce the most common transportation fuels. In addition over 96% of chemicals containing carbon, used in our society, derive from petroleum. Among all the possibilities, biomass, such as wood waste, aquatic plant, agricultural crops, municipal and animal wastes, has been recognized as the most promising candidate to replace the fossil resources. Biomass, especially lignocellulose type, represents a renewable, plentiful and cheap material for the industrial production, not only in the energy field but also as feedstock for the manufacture of chemicals, solvent and materials, expecting also environmental benefits. In this context, alkyls levulinates are a class of compounds that are widely studied, primarily as additives for diesel but also for their use as aromas, fragrances and green solvents.
This work proposes the study of the reaction between fructose and 1-butanol to produce butyl levulinate using as catalyst ionic acid-exchange resins. In particular the determination of the behavior of the catalyst, according to the reaction conditions used such as feed composition and temperature, and therefore the achievement of a greater selectivity to butyl levulinate and lower production of by-products such as formic acid, butyl formate and humins.
Results shows that decreasing the amount of water the selectivity to the main product, butyl levulinate, increases and the formation of by-products such as humins, formic acid and butyl formate decreases. In addition, rising the temperature, the reaction rate increases, leading to higher selectivity to butyl levulinate and the reduction of by-products. The best conditions to obtain the selectivity to butyl levulinate up to 59%, is working at 130°C, with no water, Ratio Fru/BuOH (mol/mol) equal to 0,0165 and Rcat(wt/wt) equal to 0.016.
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Harman, Andrew. "A One Percent Chance: Jabotinsky, Bernadotte, and the Iron Wall Doctrine." Chapman University Digital Commons, 2016. http://digitalcommons.chapman.edu/war_and_society_theses/1.
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This thesis is an examination of the long historical processes that have led to the Israel/Palestine conflict to the contemporary period, focusing mostly on the period before Israeli independence and the 1948 war that created the Jewish state. As Zionism emerged at the turn of the twentieth century to combat the antisemitism of Europe, practical and political facets of the movement sought immigration to Palestine, an area occupied by a large population of Arab natives. The answer to how the Zionists would achieve a Jewish state in that region, largely ignoring the indigenous population, fostered disagreements and a split in the Zionist ideology. The Revisionist Zionist organization was founded by Ze’ev Jabotinsky and favored a more militant orientation. With an “Iron Wall” manifesto, and as time passed and international aid waned, the Revisionists evolved into an anticolonial movement that not only viewed Palestinians as an obstacle to the Jewish state but turned their anticolonial furor toward the British and United Nations threats. That evolution reached a crescendo in 1948 when the Revisionist paramilitary group Lehi assassinated the UN Mediator, Count Bernadotte. That act was a catalyst that began the end of the war and the solidification of a Palestinian refugee crisis that persists to the present. As the Iron Wall Doctrine evolved from the early teachings of Jabotinsky through anticolonial violence and the removal of native Arabs from the new state of Israel, future prime ministers who were former Revisionist terrorists maintained the prescribed perpetual state of war Jabotinsky predicted with the now landless Palestinians. This research concludes that both Jabotinsky and Bernadotte were crucial characters in the narrative that allowed for the Iron Wall Doctrine, and thus the Jewish state, to not only exist but to carry on beyond the 1948 independence into the long standing conflict it has become.
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Saengchantara, S. T. "Mechanistic and synthetic aspects of 4H-1-benzopyran -4-one chemistry." Thesis, University of Salford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374521.
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Nadarajah, Sivakumar. "Synthesis and reactions of a 2-cyclopenten-1-one d³ synthon." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26010.
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This thesis describes the preparation of 3-trimethylstannyl-2-cyclo-penten-1-one 14 via the higher order stannylcuprate 78, a new reagent prepared to convert 3-iodo-2-cyclopenten-1-one 75 to the desired product. The observations made from this chemistry led to the development of "one-pot" cuprate formation which was demonstrated to be a viable and practically convenient way to generate such species compared with traditional methods.
This thesis also describes the preparation of 3-tert-butyldimethyl-siloxy-1-trimethylstannylcyclopentene 83, its conversion into the corresponding lithio species, and reaction of the latter reagent with electrophiles. Thus, transmetalation of 83 with methyllithium produced 1—lithio— 3-tert-butyldimethylsiloxycyclopentene 84, which reacted smoothly at -78°C in tetrahydrofuran with alkyI halides, aldehydes, and ketones, providing the corresponding products in good yield.
Treatment of the vinyllithium reagent 84 with 1 equiv. of phenylthiocopper or cuprous cyanide at -78° C for 1 h gave solutions of the corresponding cuprate reagents 103 and 104, respectively. Similarly the corresponding Grignard reagent 105 was made by addition of 1 equiv. of magnesium bromide to the solution of 84 at -78°C. The reagents thus produced reacted in a conjugate sense, the latter catalyzed by copper (I) bromide-dimethylsulphide complex, to enones such as 2-cyclopenten-1-one and 2-cyclohexen-l-one, affording the corresponding products 106 and 107 in excellent yields. β-lodo enones such as 3-iodo-2-cyclopenten-1-one 75 and 3-iodo-2-cyclohexen-1-one 7 also reacted with the cuprate 103 in a conjugate sense to give the corresponding products 108 and 109 in excellent yields. The cyanocuprate 104 prepared by a "one-pot" process also reacted with 3-iodo-2-cyclopenten-1-one 75 to give the enone 108 in good yield. [See Thesis For Diagrams]Science, Faculty of
Chemistry, Department of
Graduate
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Skevakis, Anthony Nicholas. "An Analysis of Teacher Perceptions of a Principal's Leadership Behaviors Associated with the Integration of a One-to-One Laptop Program for Students in a Parochial Secondary School." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/194772.
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The purpose of this explanatory single-case case study was to investigate teachers' perceptions of a principal's leadership behavior associated with the integration of a one-to-one laptop program in a parochial secondary school. The sample included the school principal and teachers who have had at least one year of teaching experience at the parochial school with laptop computers. Owing to a mixed methods case study approach, data was collected from four sources: a semi-structured personal interview with the school principal, semi-structured personal interviews with teachers, a focus group interview with teachers, and teachers' completion with an electronic version of the Principal Leadership Questionnaire. These multiple forms of data were collected to support data-rich triangulation on the same set of research questions. SPSS was used to assist with data analysis of the electronic survey. Cronbach's alpha was used to determine the reliability of the instrument. Themes were extracted from the semi-structured personal interviews and focus group. The findings from this study provided teachers' perceptions of a principal's leadership behaviors associated with the integration of a one-to-one laptop program for students in a parochial secondary school.
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Mokhtar, Mohd Hadri Hafiz. "Dynamical control of one- and two-dimensional optical fibre scanning." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/38477.
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This thesis investigates the dynamical control of one- and two-dimensional optical fibre scanning. One dimensional scanning is performed with a mechanically biaxial polarisation-preserving fibre mounted on a piezoelectric transducer with one of its principal mechanical axes aligned parallel to the excitation direction. The addition of an apertured reflector in front of the imaging lens allows a position sensing mechanism based on intermittent optical feedback to be integrated into the scanner. Over-scanning the lens generates timing pulses interlaced with back-scattered signals from the target. The timing information can be used for closed loop control of the phase and amplitude of vibration. Suitable control algorithms are developed and their convergence and stability is studied. This thesis also investigates the construction of fibres with enhanced mechanically asymmetry and their dynamical properties during two-dimensional imaging based on Lissajous scan patterns. Dip-coating is proposed as a method of forming two-cored waveguide cantilevers from two separate, parallel fibres that are encapsulated in a plastic coating. The frequency ratio between the two orthogonal bending mode resonances can be controlled with number of coatings. An exact image reconstruction algorithm based on Lissajous scanning is proposed. Latency, transient response and steady-state phase errors are all shown to cause dramatic deterioration of the reconstructed image. Solutions are provided by ensuring the correct starting time for data acquisition and introducing a drive phase correction to one of the axes. Two methods of resolution enhancement are demonstrated. The first is based on combining data sets obtained during separate scans carried out with deliberately applied phase offsets. The second operates by combining data sets from separate imaging operations carried out using the two different fibre cores. Finally, this thesis demonstrates potential applications in optogenetics by combining the two operations of imaging and writing, using different light sources that may also have different wavelengths.
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ALMEIDA, PRISCILLA OLIVEIRA DE. "DYNAMIC OF ONE-DIMENSIONAL FLEXIBLE STRUCTURES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9232@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Nesse trabalho, calcula-se a dinâmica de sistemas contínuos unidimensionais. Problemas de barras e vigas com diferentes condições de contorno e condições intermediárias são tratados no contexto da formulação fraca para que seja aplicado o Método de Elementos Finitos; e então seja possível calcular as aproximações das freqüências naturais e dos modos de vibração do sistema. Uma vez conhecidos os modos (exata ou aproximadamente), constrói-se um modelo reduzido de equações diferenciais ordinárias e, então, calcula-se a dinâmica do sistema. Essa dissertação propõe um material didático a ser utilizado no curso de Vibrações, com o intuito de auxiliar os alunos de graduação no estudo de sistemas contínuos, através do desenvolvimento da formulação fraca e aplicação do MEF.
In this work, the dynamic of one-dimensional continuum systems is calculated. Problems of bars and beams with different boundary and intermediate conditions are treated in the context of weak formulation, so the Finite Element Method (FEM) can be applied; and it is possible to calculate the approximation of natural frequencies and vibration modes of the system. Once the modes are known (exactly or approximately), a reduced-model of ordinary differential equations is constructed and the dynamic of the system is calculated. This essay proposes a didactic material to be used at the Vibration course, with the purpose to help undergraduate students in the studies of continuum systems, through the development of the weak formulation and the application of the FEM.
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JESUS, CRISTIANE FATIMA DIAS DE. "SKIN DISORDERS: ONE SKIN FOR TWO?" PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5226@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORA pele tem uma importância fundamental na nossa constituição psíquica. Através dos primeiros contatos de pele com a mãe ou ambiente maternante o bebê começa a formar as mais primitivas impressões acerca do corpo que lhe pertence e do mundo que o rodeia. Este estudo pretende mostrar que as afecções de pele refletem um desejo de retorno ou permanência no estado de indiferenciação com a mãe. Deste modo, parte-se do princípio que distorções no elo mãe-filho desde cedo não permitem ao mesmo vivenciar com naturalidade seu trajeto rumo à independência, nos termos de Winnicott, ou em direção à individuação, de acordo com Mahler. A falta de um ambiente bom o bastante dificulta a aquisição de uma experiência subjetiva de corpo. Por outro lado, abordam- se também os pressupostos da Escola de Psicossomática de Paris, segundo a qual, os processos que levam à vulnerabilidade psicossomática também estariam relacionados à falhas na estruturação desta ligação, resultando na insuficiência e/ ou desorganização das funções psíquicas. Portanto, com este objetivo pretende-se mostrar que as afecções de pele refletem uma falha nos processos de delimitação das fronteiras do corpo pela falta ou inadequação do investimento materno nos primeiros anos de vida, dificultando a experiência de unidade e coesão de seus processos internos e externos. Na parte final, procede-se à discussão de um caso clínico à luz das teorias anteriormente mencionadas.
The skin is of basic importance to our psychic constitution. Through the first skin contacts with the mother or mothering environment the baby starts to form the most primitive impressions concerning the body that belongs to him/her as well as the world that surrounds it. This study intends to show that skin disorders reflect the desire of a return or permanence in the state of indiferenciation with the mother. In this way, based on distortions in the early mother-baby link, the child is not allowed to naturally live his passage towards independence, as per Winnicott, or towards individuation, according to Mahler. The lack of a good enough environment makes the acquisition of a subjective body experience difficult. On the other hand, principles of the school of psychoanalytic psychosomatics of Paris were used, according to which processes that lead to the psychosomatic vulnerability would also be related to imperfections in structuring this relationship, which would result in an insufficient and/or a disorganization of the psychic functions. Therefore with this objective in mind, it was intended to show that skin disorders reflect a failure in the process of delimitation of the body limits due to the lack or inadequate maternal investments in the first years of life, hindering an experience of oneness and cohesion of internal and external processes. In the final part of the dissertation a clinical case is discussed according to the theoretical background covered in this work.
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Costall, Aaron. "A one-dimensional study of unsteady wave propagation in turbocharger turbines." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/18232.
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Flow in a turbocharger turbine is highly unsteady in nature as it responds to the exhaust manifold of an internal combustion (IC) engine. Despite this it is conventional to use quasi-steady turbine models in one-dimensional turbocharged engine simulations, even though they cannot reproduce the known hysteresis of turbine mass flow and performance characteristics recorded under pulsating flow conditions. Using filling-and-emptying models improves the situation by permitting mass accumulation in the turbine volute. Depending on the unsteadiness level, this approach may still be insufficient to capture true turbine operation since neither method can resolve unsteady effects due to pressure wave action in the flow. It is unclear when transition occurs between filling-and- emptying and wave action modes. To this end, a proprietary computational gas dynamics code in C++ is presented to simulate the unsteady, compressible flow inherent to IC engine exhaust manifolds. The Euler equations for one-dimensional inviscid flow are discretized to provide second-order, conservative, shock-capturing finite difference schemes able to resolve wave propagation in ducts with area variation, wall friction and heat transfer. A wave action turbine volute model is constructed using bespoke boundary conditions. Validation against experimental data shows satisfactory agreement for pulse frequencies up to 40 Hz, and improved instantaneous swallowing capacity prediction at all tested frequencies compared to quasi-steady calculations. Fourier series characterization of on-engine pulse waveforms reveals multiple harmonic components, causing significant regions of divergence between filling-and-emptying and wave action predicted hystereses. Comparison of concurrent wave action and filling-and-emptying simulations applying simpler sinusoidal waveforms allows development of the unsteadiness measures FSt and FSt(p). An approximate guideline to ensure a filling-and-emptying mode stipulates FSt [Symbol appears here. To view, please open pdf attachment]0.15 and FSt(p) [Symbol appears here. To view, please open pdf attachment]0.02. Evaluation of FSt and FSt(p) for an example on-engine case indicates certain wave action already by 1600 rev/min, borne out by subsequent inspection of the swallowing capacity traces.
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Magness, Alastair. "Diagnosing cancer one cell at a time with single molecule spectroscopy." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/57501.
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Mapping protein expression heterogeneity in cancer at single cell resolution is essential for the understanding of disease progression, emergent drug resistance, and metastasis, but is a great technical challenge. Longitudinal monitoring of heterogeneity pertaining to biomarker expression may provide the necessary medical cues for the administering of personalised therapeutics. Studying molecular heterogeneity in the ultra-rare circulating tumour cells [CTCs] found in the blood of cancer patients is a greater challenge still, but success may yield deep insight into the nature of the metastatic cascade, and also provide the technologi-cal means of a non-invasive ‘liquid biopsy’. The MAC chip is a quantitative single molecule sensitive protein assay for the evalua-tion of protein copy number in single cells. In this thesis, we attempt the development of a new biomarker-targeting MAC chip assay for the breast cancer oncoprotein estrogen recep-tor alpha. We describe a series of improvements to the MAC chip assay architecture allow-ing multiplexed measurement of several proteins simultaneously, and improvements to analysis methods allowing for superior molecule counting. Building on the work of others in the field of circulating tumour cell isolation, we attempt the integration of the MAC chip analysis method into a multiple-stage device for the isolation and proteomic analysis of cir-culating tumour cells. Finally, using a multiplexed MAC chip device for the tumour sup-pressor protein p53 and its activated form phosphorylated at serine-15, we demonstrate for the first time that the MAC chip can be used to study protein expression heterogeneity in quasi-clinical samples. The patient-derived xenografts we use to perform this work are a key resource of clinically-relevant tumour material, and a model system directly analogous to primary patient biopsies, thus demonstrating the feasibility of translational single cell pro-teomics with the MAC chip system.
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Dirksen, Gerald Erwin. "The one thousand years of Revelation 20:1-10 a "premillennial" interpretation /." Theological Research Exchange Network (TREN), 1988. http://www.tren.com.
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Choudhury, Ruksana. "Metabolism and pharmacokinetics of 1-hydroxyalkyl-3-hydroxpyridin-4-one chelating agents." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336336.
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Matharoo, Rishi. "1/f Additive Phase Noise Analysis for One-Port Injection Locked Oscillators." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430772754.
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Sandy, I. M. "Solvent induced transitions and magnetic properties of 1-D conductors." Thesis, Cranfield University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233338.
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Munter, Mårten, and Linus Ternander. "One Laptop per Child : En studie av ett IKT-projekt i Rwanda." Thesis, Högskolan i Borås, Institutionen för Pedagogik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16953.
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BakgrundVi har undersökt projektet One Laptop per Child vilket är datorprojekt startat i USA med syfte att förse elever i utvecklingsländer med varsin dator i undervisningen. Sedan år 2000 har Rwanda påbörjat en tydlig satsning för landets utveckling. IKT har en stor roll ochgenomsyrar alla officiella dokument, från regering till läroplaner. I officiella dokument från OLPC figurerar uttrycket Learning by doing, vilket är starkt förknippat med John Dewey och hans pedagogiska tankar. Forskningen kring datorer i skolan och antalet datorer per elev är oenig, men gemensamt för den forskning vi har tagit del av är att skolor som arbetar med datorer avkrävs en tydlig struktur kring upplägget.SyfteSyftet med vår studie är att ta reda på hur elever och lärare i en klass, som ingår i projektet One Laptop per Child, i Rwandas huvudstad Kigali förhåller sig till och använder sig av datorn i undervisningen.MetodVi har genomfört en kvalitativ studie med inspiration från etnografin där vi har använt oss av observationer och intervjuer vid insamlandet av data. Före vår studie tog vi kontakt med ansvariga inom OLPC Rwanda, så kallade gatekeepers, som hjälpte oss att genomföra vår studie på plats i Kigali.ResultatLärarna använde datorn vid steg-för-steg instruktioner i helklass och när eleverna behövde hjälp. Detsamma gäller elev-lärarna men de använde också datorn vid lektionsintroduktioner. Eleverna använde datorn främst vid enskilt arbete för att skapa animationer och utbyta idéer. Datorn framställs ur lärarnas synvinkel som ett kunskapshöjande verktyg som tränar elevernaatt bland annat kommunicera och dela med sig av kunskap.Program: Lärarutbildningen
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Baird, Heather A. "Mechanisms of Intersubtype Recombination of Human Immunodeficiency Virus Type One." Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1120599751.
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Adegoke, Adekunle M. "The one-dimensional spin-1/2 ANNNI model in non-commuting magnetic fields." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980733596.
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Ren, Xiaohong, and Yi-Qiao Song. "Measurements of diffusion, T 1 and T 2 in one shot by MMME." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-192042.
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In this paper, we demonstrate a rapid simultaneous measurement of diffusion constant D, T1 and T2 relaxation times in just two scans. Theoretical standard deviations of D, T1 T2 for a wide range of T1 and T2 were predicted for given sequences with a random experimental error of 3%. By carefully selecting of sequence parameters for samples with different relaxation times, the error propagators in T1, T2, and D can be modified to within 10%.
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Ren, Xiaohong, and Yi-Qiao Song. "Measurements of diffusion, T 1 and T 2 in one shot by MMME." Diffusion fundamentals 10 (2009) 11, S. 1-4, 2009. https://ul.qucosa.de/id/qucosa%3A14102.
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In this paper, we demonstrate a rapid simultaneous measurement of diffusion constant D, T1 and T2 relaxation times in just two scans. Theoretical standard deviations of D, T1 T2 for a wide range of T1 and T2 were predicted for given sequences with a random experimental error of 3%. By carefully selecting of sequence parameters for samples with different relaxation times, the error propagators in T1, T2, and D can be modified to within 10%.
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Leydold, Josef, and Wolfgang Hörmann. "The Automatic Generation of One- and Multi-dimensional Distributions with Transformed Density Rejection." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 1997. http://epub.wu.ac.at/1328/1/document.pdf.
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A rejection algorithm, called ``transformed density rejection", is presented. It uses a new method for constructing simple hat functions for a unimodal density $f$. It is based on the idea of transforming $f$ with a suitable transformation $T$ such that $T(f(x))$ is concave. The hat function is then constructed by taking the pointwise minimum of tangents which are transformed back to the original scale. The resulting algorithm works very well for a large class of distributions and is fast. The method is also extended to the two- and multidimensional case. (author's abstract)Series: Preprint Series / Department of Applied Statistics and Data Processing
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Jones, C. Mair A. "Scattering of sound by a semi-infinite sandwich panel perforated on one side." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46846.
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Eagles, Richard Thomas. "Electron-optical cameras with ultrahigh time resolution in one and two spatial dimensions." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37999.
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Heck, Elisiane Frantz. "Síntese one pot de 1,3,4-oxadiazóis derivados de L-aminoácidos e benzoil-hidrazidas." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/10514.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorIn the following work, a range of 1,3,4-oxadiazles 2,5-disubstituted 3 was prepared, using a one pot approach, from L-amino acids 1(a-e) and 2-benzoylhydrazides, using POCl3 as dehydrating agent. The study involved the reaction of L-amino protected amino acids (1a-e) and benzoyl hydrazide (2a-d) prepared in the conventional method using 1,4- dioxane as solvent and POCl3 as dehydrating agent, providing the products yields between 30-63%. The reactions to obtain the 1,3,4-oxadiazóis were also performed under microwave irradiation, in the absence of solvent and short reaction time, giving the products with moderate to good yields (42-72%). It was subsequently held a one pot synthesis of 1,3,4-oxadiazóis 2,5 - disubstituted from selenocysteine 1f, L-serine-derived, and benzoyl hydrazide (2a-d), carried out in conventional method and microwave irradiation, with yields of 50-66% and 47-54% respectively.
No presente trabalho, uma série de 1,3,4-oxadiazóis 2,5-dissubstituídos 3 foi preparada, empregando uma metodologia one pot, a partir de Laminoácidos 1 e benzoil-hidrazidas 2, utilizando POCl3 como agente de acoplamento. O estudo envolveu a reação de L-aminoácidos amino (1a-e) protegidos e benzoil hidrazidas (2a-d), realizadas no método convencional utilizando 1,4- dioxano como solvente e POCl3 como agente de acoplamento, fornecendo os produtos em rendimentos de 30-63%. As reações para obtenção dos 1,3,4- oxadiazóis também foram realizadas sob irradiação de micro-ondas na ausência de solvente e em curtos tempos reacionais fornecendo os respectivos produtos em rendimentos de moderados a bons (42-72%). Posteriormente foi realizada a síntese one pot dos 1,3,4-oxadiazóis 2,5- dissubstituídos a partir da selenocisteína 1f, derivada da L-serina, e das benzoil-hidrazidas (2a-d), realizadas no método convencional e sob irradiação de micro-ondas, com rendimentos de 50-66% e 47-54%, respectivamente.
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Franke, Victoria Eleanor. "One-dimensional spectral/hp element simulation of wave propagation in human arterial networks." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/7221.
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IBANEZ, GUILLERMO RODOLFO JORDAN. "TRANSITION OF TWO-DIMENSIONAL CRACKS TO ONE-DIMENSIONAL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=16957@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOA falha por fadiga nas estruturas e um problema muito comum que é caracterizado pela geração ou propagação paulatina de uma ou varias trincas e causada pela aplicação cíclica de cargas variáveis. A propagação das trincas bidimensionais tem sido estudada através de diferentes métodos numéricos que ajudam a descrever aproximadamente o valor do fator de intensidade de tensões ao longo da frente da trinca que é o parâmetro que controla a propagação. Porém, existem algumas expressões analíticas para trincas bidimensionais fornecidas na literatura que ajudam a descrever os fatores de intensidade de tensão e . Estas equações estão limitadas a diversos fatores de forma que relacionam as características geométricas da peça, espessura, largura e o tipo de entalhe já que as trincas bidimensionais mudam de aspecto a cada ciclo de carga. Contudo o processo de transição não tem sido acompanhado por estudos experimentais nem analíticos. Em especial, esta situação ocorre devido a que a transição acontece em poucos ciclos o que dificulta a sua medição. Esta pesquisa tem como objetivo geral estudar o processo de transição das trincas bidimensionais para unidimensionais com a utilização de um material transparente e com boas propriedades mecânicas como e o policarbonato. Experimentalmente, as trincas de fadiga bidimensionais se propagam em corpos de prova retangulares com defeito quarto - elíptico e são controladas sob condições de variável e baixa freqüência. Para calcular a vida total de uma trinca por fadiga, é preciso também modelar a transição. Foram tomados valores de comprimento experimentais a, c e c’ no processo de transição que nos permitem avaliar as taxas , e calculados os fatores de intensidade de tensão que controlam a transição. Os valores experimentais são também usados como dados de entrada num programa de análise numérica de propagação de trincas, o FRANC3D, o qual nos permite calcular os fatores de intensidade de tensão ao longo da frente da trinca quarto - elíptica.
The fatigue failure of structures is a common problem that is characterized by the generation and propagation of one or several cracks caused by the cyclic application of variable loads. A crack is considered one-dimensional when the trajectory can be represented by a curve, as in the case where a surface crack pierces the entire thickness of a piece. If the crack penetrates partially in the specimen, it is considered to be two dimensional. Mathematical and physical models for simulating one-dimensional crack propagation by fatigue are widely known, and the main parameter that controls crack propagation is the stress intensity factor. However, the simulation of two-dimensional crack propagation has not yet reached the same state of development. There are some empirical expressions for two-dimensional cracks provided in the literature that help describe the stress intensity factors. These equations are limited to various form factors that relate the stress intensity to the geometrical characteristics of the piece. Also there are numerical methods that help describe some of the values of stress intensity factor along the crack front of a two-dimensional crack. An important question in calculating the total life of fatigue crack is describing the transition from a crack partially penetrating (two dimensional) for a one-dimensional (passing crack), because to calculate the total life of a fatigue crack is also necessary to model the transition. However, this process of transition has not for many geometries been described by analytical or experimental studies. One reason for this is that the transition often happens in a few cycles of load application, which complicates measurements. This research was aimed at investigating the process of transition from the two-dimensional crack to a one-dimensional crack with the use of polycarbonate a transparent material with good mechanical properties, polycarbonate. Experiments were conducted involving crack propagation in plates with a rectangular cross section. In each experiment, a crack was induced as a defect with a quarter-elliptical shape in one corner of the specimen. The propagation affected by the application of a low-frequency cyclic loading. Values of characteristic lengths of the two-dimensional shape of the crack (a, c and c ) were measured during the transition process, which allowed us to evaluate the rates of change of these parameters with the number of cycles N applied load and to evaluate the normalized stress intensity factors that control the transition. The experimental values are also used as input to a program for numerical analysis of crack propagation, the FRANC3D, which allows us to calculate the stress intensity factors along the front quarter-elliptical crack.
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LEITE, LEONARDO DE SOUZA. "CONICS AND GRAPHS OF FUNCTIONS OF ONE VARIABLE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26149@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
O objetivo deste trabalho é apresentar conteúdos necessários para a construção de uma base sólida em Matemática do Ensino Fundamental e Médio, mas que são em geral mal assimilados pelos alunos. Inicialmente apresentaremos o plano cartesiano, equações de uma e duas variáveis, funções de uma variável real e gráfico de funções. Passaremos então ao estudo de curvas simples e bem conhecidas dos alunos em geral, como a circunferência, e chegaremos até as cônicas rotacionadas. A partir daí, procuramos relacionar as duas partes do trabalho, mostrando como as cônicas podem ser vistas como gráficos de função de uma variável. Pretende-se que este trabalho possa ser utilizado por professores do Ensino Fundamental e Médio em sala de aula, pois boa parte do conteúdo apresentado faz parte do currículo mínimo da Secretaria de Educação do Estado do Rio de Janeiro. Propomos atividades teóricas e computacionais, utilizando o software Geogebra para construção de curvas no plano cartesiano.
The objective of this paper is to present content needed to build a solid foundation in mathematics from primary and secondary schools, but are generally poorly assimilated by the students. Initially present the Cartesian plane, equations of one and two variables, functions of a real variable and function graph. Then we pass to the study of simple curves and well known to students in general, as the circumference, and arrive until the conical rotated. From there, we try to relate the two parts of the work, showing how the taper can be seen as a variable function graphs. It is intended that this work can be used by teachers of primary and secondary education in the classroom, because much of the content presented is part of the minimum curriculum of the Department of Education of the State of Rio de Janeiro. We propose theoretical and computational activities, using the Geogebra software to build curves in the Cartesian plane.
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Payson, Robert A. "Cloning and Characterization of the Fibroblast Growth Factor 1 (FGF-1) Gene and Expression Analysis of One of its Transcripts (FGF-1.C) /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487862399450239.
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Silva, Raphael Dias da. "Translating one-way quantum computation to the circuit model: methods and applications." Niterói, 2017. https://app.uff.br/riuff/handle/1/3058.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico
In this thesis I study the one-way quantum computation (1WQC) model and some applications of the different ways of translating 1WQC algorithms into the circuit model. In a series of recent results, different sets of conditions for implementing a computation deterministically in the one-way model have been proposed, each of them with their own properties. Some of those sets of conditions - generically known as flow conditions - try to explore the distinct parallel power of the 1WQC model, by increasing the number of operations that can be performed simultaneously. Here I contribute to this line of research by defining a new type of flow, which I call the signal-shifted flow (SSF), which has an interesting parallel structure that equals that of a depth-optimal flow.I also introduce a new framework for translating 1WQC algorithms into the circuit model. This translation preserves not only the computation performed but also some features of the 1WQC algorithm design. Within this framework I give two algorithms, each implementing a different translation procedure: the first gives compact (in space use) circuits for Regular Flow one-way computations, and the second does the same for SSF one-way computations. As an application of the SSF translation procedure, I combine it with other translation and optimization techniques to give an automated quantum circuit optimization procedure. This procedure is based on back-and-forth translation between the 1WQC and the circuit model, using 1WQC techniques to time-optimize computations in the circuit model. In the second part of this thesis, I use 1WQC tools to analyze quantum circuits interacting with closed timelike curves (CTCs). I do so by translating to the 1WQC model CTC-assisted circuits, and then showing that in some cases they can be shown to be equivalent to time-respecting circuits. The predictions obtained in those cases are exactly those of the quantum CTC model based on post-selected teleportation, proposed by Bennett, Schumacher and Svetlichny (BSS). This enabled us to show that the BSS model for quantum CTCs makes predictions which disagree with those of the highly influential CTC model proposed by David Deutsch.
Nesta tese eu estudo o modelo de computação quântica baseada em medições (CQBM) e algumas aplicações das diferentes maneiras de traduzir algoritmos de CQBM para o modelo de circuitos. Em uma série de resultados recentes, vários conjuntos de condições para implementar uma computação deterministicamente no modelo de CQBM têm sido propostas, cada um deles com diferentes propriedades. Alguns desses conjuntos de condições - genericamente conhecidos como condições de fluxo (flow) - tentam explorar o poder de paralelização do modelo de CQBM, aumentando o número de operações que podem ser realizadas simultaneamente. Aqui eu contribuo para essa linha de pesquisa definindo um novo tipo de fluxo, chamado fluxo de sinal deslocado (FSD), que tem uma estrutura paralela interessante que se iguala ao de um fluxo ótimo, do ponto de vista temporal. Eu também introduzo um novo sistema para traduzir algoritmos de CQBM para o modelo de circuitos. Esta tradução preserva não só a computação, mas também outras características de algoritmos em CQBM. Usando esse sistema eu desenvolvo dois algoritmos, cada um capaz de executar um procedimento de tradução diferente: o primeiro obtém circuitos compactos a partir de computações com fluxo regular, e o segundo faz o mesmo para computações com FSD. Como uma aplicação do procedimento de tradução de computações com FSD, eu combino esse procedimento com outras técnicas de tradução e otimização para desenvolver um procedimento automático de otimização de circuitos quânticos. Esse procedimento é baseado em traduções nos dois sentidos entre os modelos de CQBM e de circuitos, usando técnicas de CQBM para otimizar circuitos quânticos Na segunda parte desta tese, eu uso ferramentas do modelo de CQBM para analisar circuitos quânticos interagindo com curvas temporais fechadas (CTFs). Essa análise é feita traduzindo circuitos interagindo com CTFs para o modelo de CQBM e em seguida mostrando que, em alguns casos, esses circuitos podem ser transcritos como circuitos sem CTFs que realizam a mesma computação. As predições obtidas nesses casos são exatamente as mesmas daquelas obtidas usando o modelo para estudar CTFs proposto por Bennett, Schumacher e Svetlichny (BSS). Isso nos permitiu mostrar que o modelo BSS para CTFs faz predições que não concordam com aquelas dadas pelo influente modelo de CFTs proposto por David Deutsch.
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Tomasello, Antonino. "One-dimensional modelling of mixing, dispersion and segregation of multiphase fluids flowing in pipelines." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/4401.
Full textAbstract:
The flow of immiscible liquids in pipelines has been studied in this work in order to formulatea one-dimensional model for the computer analysis of two-phase liquid-liquid flow in horizontalpipes. The model simplifies the number of flow patterns commonly encountered in liquid-liquidflow to stratified flow, fully dispersed flow and partial dispersion with the formation of one ortwo different emulsions. The model is based on the solution of continuity equations for dispersedand continuous phase; correlations available in the literature are used for the calculation of themaximum and mean dispersed phase drop diameter, the emulsion viscosity, the phase inversionpoint, the liquid-wall friction factors, liquid-liquid friction factors at interface and the slipvelocity between the phases. In absence of validated models for entrainment and depositionin liquid-liquid flow, two entrainment rate correlations and two deposition models originallydeveloped for gas-liquid flow have been adapted to liquid-liquid flow. The model was appliedto the flow of oil and water; the predicted flow regimes have been presented as a functionof the input water fraction and mixture velocity and compared with experimental results,showing an overall good agreement between calculation and experiments. Calculated valuesof oil-in-water and water-in-oil dispersed fractions were compared against experimental datafor different oil and water superficial velocities, input water fractions and mixture velocities. Pressure losses calculated in the full developed flow region of the pipe, a crucial quantity inindustrial applications, are reasonably close to measured values. Discrepancies and possibleimprovements of the model are also discussed. The model for two-phase flow was extended to three-phase liquid-liquid-gas flow withinthe framework of the two-fluid model. The two liquid phases were treated as a unique liquidphase with properly averaged properties. The model for three-phase flow thus developed wasimplemented in an existing research code for the simulation of three-phase slug flow with theformation of emulsions in the liquid phase and phase inversion phenomena. Comparisons withexperimental data are presented.
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Karamanoglu, Sema. "One Historian Two Books: Beatriz Colomina." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615519/index.pdf.
Full textAbstract:
This thesis aims to explore selected works of Beatriz Colomina, a revisionist architectural historian who has made influential studies on visuality, domesticity, media and gender, and their reflections in the architectural world. Colomina is a distinguished architectural historian since she places a new lens on a period when architecture ceased to be only for the elite and media has gradually penetrated into everyone&rsquos life in order to understand how architecture became accessible to the public through media and how this has affected the perception of modern architecture. This new lens entailed not only the inseparability of media and architecture but also how war and domesticity featured in this relationship. Against this background, this study attempts to investigate the innovative approach of Beatriz Colomina by comparing and contrasting her two prominent books: Privacy and Publicity: Modern Architecture as Mass Media (1994) and Domesticity at War (2007). The former introduces us to the relationship between architecture and media, whereas the latter exemplifies this relationship by focusing on the cold war period as a time where media became an integral part of the domestic environment. This study aims to extract Colomina&rsquo
s contribution to architectural history by first disentangling and analysing and then merging these two books under common themes. In doing so, it seeks to answer the following questions: What is the role of archives in Colomina&rsquo
s methodology in writing these two books? What is the relationship between the document and the historian that emerges from this methodology? What common themes can be extracted from these two books as an analytical framework in order to better understand and study Colomina&rsquo
s approach? What differentiates her as a historian from other historians of modern architecture, specifically from Siegfried Giedion and Kenneth Frampton? What messages does Colomina give her reader through the form as well as the content of her books? What is her contribution to architectural historiography?
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Kalu, Chimdi, Austin Miller, and Abbas G. Shilabin. "SYNTHESIS AND BIOLOGICAL SIGNIFICANCE OF 1,2,4-OXADIAXOLIDIN-5-ONE." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/121.
Full textAbstract:
SYNTHESIS AND BILOGICAL SIGNIFICANCE OF
1,2,4-OXADIAXOLIDIN-5-ONE
Chimdi kalu, Austin Miller and Dr. Abbas G. Shilabin
Department of Chemistry, East Tennessee State University, Johnson City, TN 37614.
ABSRTACT
Due to the challenge posed by microbial resistance to broad spectrum of antibiotics, there has been a great need to synthesize of a novel compound which has a different mechanism of action on microbial activity. 1,2,4-oxadiaxolidin-5-One constitute an important class of compound with tremendous potential as pharmaceutical and otherwise biologically relevance substance due to the fact that its five member ring is a configurationally stable building block. This unit is found in other compound like alkaloids, with vast medical application. This study describes the synthesis of 1,2,4-oxadiaxolidin-5-one in two-step procedure using nitroethane and benzaldehyde as starting materials to produce nitrone, which in turn undergoes 1,3- dipolar cycloaddition with phenyl isocyanate to give 1,2,4-oxadiaxolidin-5-one. The product was characterized using proton NMR and GC-MS. There is an ongoing investigation on the summary of some important inhibitory activity against class A β-lactamase by 1,2,4-oxadiaxolidin-5-one heterocyclic core structure to provide effective antimicrobial β-lactamase inhibitors, hence, solving the problem of microbial resistance to currently used antimicrobial drugs.
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ALAMO, FREDY JONEL CORAL. "DYNAMICS OF SLENDER ONE-DIMENSIONAL STRUCTURES USING COSSERAT CONTINUUM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9631@1.
Full textAbstract:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
Neste trabalho é formulado e analisado o equilíbrio estático e a dinâmica de uma viga elástica tridimensional. A teoria tridimensional empregada, que pode ser chamada de teoria de Cosserat para vigas, é exata geometricamente, ou seja, não está baseada em aproximações geométricas ou suposições mecânicas. Para a deformação da viga, assume-se a hipótese de Bernoulli e por simplicidade consideram-se relações constitutivas lineares para o material. A configuração deformada da viga é descrita através do vetor de deslocamento da curva de centróides, e uma base móvel, rigidamente unido à secção transversal da viga. A orientação da base móvel, relativo a um sistema inercial, é parametrizada usando três rotações elementares consecutivas. Na teoria de Cosserat para vigas, as equações do movimento são equações diferenciais parciais não-lineares em função do tempo e uma variável espacial. No entanto, para o equilíbrio estático, as equações tornam- se equações diferenciais ordinárias não-lineares com uma variável espacial que são resolvidas usando o método de perturbação. Da solução do equilíbrio estático, obtêm-se as funções de deslocamento da viga, em função dos deslocamentos e rotações nodais, as quais são usadas para a análise dinâmica. Para obter a dinâmica da viga usa-se a equação de Lagrange, que é formada pelas expressões da energia cinética e da energia potencial de deformação. Além disso, usa-se o método de Newmark para resolver as equações do movimento. Como aplicação, estuda-se numérica e experimentalmente, a dinâmica de uma viga rotativa curva contida numa cavidade uniforme. Quando se usa a teoria de Cosserat para vigas, que leva em conta as não linearidades geométricas, a alta precisão da resposta dinâmica é obtida dividindo o sistema em poucos elementos, as quais são bem menores que o tradicional MEF, essa é a principal vantagem da teoria desenvolvida.
In this work, it is formulated and analyzed the static equilibrium and the dynamics for three dimensional deformation of elastic rods. The intrinsically one-dimensional theory that is employed, which may be called the special Cosserat theory of rods, is geometrically exact, namely, it is not based upon geometrical approximations or mechanical assumptions. For the rod deformation, it is adopted the Bernoulli hypotheses and for simplicity, the linear constitutive relations are employed. The deformed configuration of the rod is described by the displacement vector of the deformed centroid curve and an orthonormal moving frame, rigidly attached to the cross-section of the rod. The orientation of the moving frame, relative to the inertial one, is related by the rotation matrix, parameterized by three elemental rotations. In the sense of Cosserat theory, the equations of motion are nonlinear partial dfferential equations, which are functions of time and one space variable. For the static equilibrium, however, the equations become nonlinear ordinary differential equations with one space variable, which can be solved approximately using standard techniques like the perturbation method. After the static equilibrium equation are solved, the displacement functions are obtained. These nonlinear displacement functions, which are functions of generic nodal displacements and rotations, are used for dynamical analysis. To obtain the dynamics of the Cosserat rod, it is used the Lagrangian approach, formed from the kinetic and strain energy expressions. Furthermore, the equations of motion, which are nonlinear ordinary dfferential equations, are solved numerically using the Newmark method. As an application, a curved rod, constrained to rotate inside a hole, is investigated numerically and experimentally. When using the Cosserat rod approach, that take into account all the geometric nonlinearities in the rod, the higher accuracy of the dynamic responses is achieved by dividing the system into a few elements, which is much less than in the traditional FEM
48
CARNEIRO, JORGE HENRIQUE SAYÃO. "EDUARDO SUED: THE INDEFINITE ONE INSIDE OF A GRATING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18371@1.
Full textAbstract:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROO presente trabalho busca analisar a produção plástica do artista Eduardo Sued a partir dos anos 70 até os dias de hoje. Para tal, buscou-se fazer uma análise fenomenológica de sua obra, valendo-se do preceito husserliano de retorno as coisas mesmas. As obras do artista são analisadas sob seus aspectos formais, como fontes primárias para interpretação do pensamento plástico expresso pelo artista. A partir das obras estabeleceram-se as relações de influência das obras e dos artistas que determinaram sua produção, com especial ênfase nas obras de Mondrian, Matisse, Picasso e Morandi. Também foi abordada sua divergência para com os movimentos de arte concretos e de abstratos informal que dominavam a cena artística no Brasil durante os anos de formação de Sued. Em anexo a transcrição de uma série de entrevistas feitas com o artista durante o eríodo de pesquisa para a dissertação.
The following dissertation analyses the artistic production of the painter Eduardo Sued from the seventies until today. Using the husserlian method of return to things itself, it does a phenomenological analysis of his work. Sued’s paintings are analysed through its formal aspects as the primary source for the interpretation artist’s plastic thoughts. Relationships of influence were established between Sued’s paintings and those that determined its production with special enfasis on the works of Mondrian, Matisse, Picasso and Morandi. In addition to that, it also looks into his divergence from the Concrete Art and Informal Abstract movement that were mainstream at the time of Sued’s formation years in Brazil. The transcript of a series of interviews with the artist done during this dissertation research is attached.
49
ALTMANN, HELENA. "TRUTHS AND PEDAGOGIES IN SEX EDUCATION AT ONE SCHOOL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6496@1.
Full textAbstract:
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOEsta tese teve como objetivo investigar a construção social da educação sexual em uma escola municipal do Rio de Janeiro com um Núcleo de Adolescentes Multiplicadores (NAM). Foi desenvolvida uma pesquisa etnográfica entre agosto de 2002 e junho de 2003, tendo sido feitas observações dos encontros do NAM, de aulas de diversas disciplinas e, em especial, das de Ciências, além de reuniões, recreios e outros. Foram realizadas entrevistas com professoras/es e estudantes. Sendo a sexualidade um importante foco de investimento político e de tecnologia de governo, a escola desponta como um espaço privilegiado para o desenvolvimento do biopoder. Esta tese demonstra de que modo a educação está imbricada nessa problemática e como ela se relaciona com outras áreas do saber, como a biologia, a medicina, a demografia e a psicologia, a fim de gerenciar a sexualidade adolescente. A educação sexual tem sido realizada nas escolas, predominantemente por professoras/es de Ciências, a partir do tema reprodução humana e, em algumas escolas, dentro do NAM. A escola oferece um saber que se propõe científico e, portanto, verdadeiro sobre a sexualidade, o qual é utilizado pelos/as alunos/as como um critério de verdade para avaliar seus conhecimentos prévios sobre esse tema. O corpo humano é concebido como um organismo e cada um dos órgãos é estudado tendo como foco principal a função reprodutiva. Ganha assim destaque o corpo da mulher em relação ao do homem. Contraditoriamente, ao desenvolver a educação sexual a partir do tema reprodução, é esta que acaba sendo enfatizada, quando é justamente a ocorrência dela entre adolescentes que diversas políticas educacionais querem evitar. As intervenções escolares buscam desenvolver nos/as adolescentes um sentido de responsabilidade em torno das relações sexuais, buscando mudar ou adequar os dispositivos que estruturam os comportamentos preventivos. Para isso, além de recomendar o uso do preservativo para uma prática de sexo seguro, aconselha-se um determinado modelo de relacionamento no qual a relação sexual deva ocorrer. De modo semelhante, a gravidez desponta como uma experiência inadequada a esse período da vida.
This thesis has the objective of investigating the social construction of sex education in a public school with a Nucleus of Adolescent Multipliers (NAM). An ethnographic research was developed in a school in Rio de Janeiro, Brazil, between August, 2002, and June, 2003. During this period, NAM`s meetings, classes of various subjects, and, specially, the classes of Sciences were observed, as well as meetings, breaks, and other activities. Students and teachers were interviewed. The current intense debate about the sexuality of adolescents is caused by the fact that sexuality is an important focus of political investment and of governance technology, and, the school reveals itself as a privileged space for the development of biopower. This thesis demonstrates in what ways education is imbricated in this problematic and how it relates to other areas of knowledge, as biology, medicine, demography and psychology, in order to manage the adolescent sexuality. Sex education has been taught at schools mainly by Science teachers based on the theme of human reproduction, and, in some schools, in the framework of NAM. The school offers the students a knowledge that pretends to be scientific, and, therefore, true about sexuality, which is used by them as a criterion of truth to judge their previous knowledge about this theme. In this perspective, the human body is conceived as an organism and each organ is studied having as main focus its reproduction function. Thus, the woman`s body receives greater emphasis than the man`s body. Contradictorily, when sex education is developed on the basis of the reproduction theme, precisely this ends up being emphasized, in spite the fact that it is exactly its occurrence among adolescents that the various educational policies intend to avoid. The school interventions try to develop among adolescents a sense of responsibility around the sexual relations, aiming to change or to adequate the mechanisms that structure patterns of preventive behavior. With this objective, the school, besides fostering the use of preservatives for the practice of safe sex, ends up recommending a specific model of relationship, in which sex relations should occur. In a similar way, pregnancy appears as an inadequate experience for this period of life.
50
Tzimas, Dimitrios V. "A new framework of iterated forcing along a gap one morass at [omega]1." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/29862.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1993.On t.p., "[omega]" appears as the lower case Greek letter.
Includes bibliographical references (leaves 38-39 ).
by Dimitrios V. Tzimas.
Ph.D.