Dissertations / Theses: 'RICSH'

1

Aknouche, Rachid. "Entrepôt de textes : de l'intégration à la modélisation multidimensionnelle de données textuelles." Thesis, Lyon 2, 2014. http://www.theses.fr/2014LYO20025.

Full text

Abstract:

Le travail présenté dans ce mémoire vise à proposer des solutions aux problèmes d'entreposage des données textuelles. L'intérêt porté à ce type de données est motivé par le fait qu'elles ne peuvent être intégrées et entreposées par l'application de simples techniques employées dans les systèmes décisionnels actuels. Pour aborder cette problématique, nous avons proposé une démarche pour la construction d'entrepôts de textes. Elle couvre les principales phases d'un processus classique d'entreposage des données et utilise de nouvelles méthodes adaptées aux données textuelles. Dans ces travaux de thèse, nous nous sommes focalisés sur les deux premières phases qui sont l'intégration des données textuelles et leur modélisation multidimensionnelle. Pour mettre en place une solution d'intégration de ce type de données, nous avons eu recours aux techniques de recherche d'information (RI) et du traitement automatique du langage naturel (TALN). Pour cela, nous avons conçu un processus d'ETL (Extract-Transform-Load) adapté aux données textuelles. Il s'agit d'un framework d'intégration, nommé ETL-Text, qui permet de déployer différentes tâches d'extraction, de filtrage et de transformation des données textuelles originelles sous une forme leur permettant d'être entreposées. Certaines de ces tâches sont réalisées dans une approche, baptisée RICSH (Recherche d'information contextuelle par segmentation thématique de documents), de prétraitement et de recherche de données textuelles. D'autre part, l'organisation des données textuelles à des fins d'analyse est effectuée selon TWM (Text Warehouse Modelling), un nouveau modèle multidimensionnel adapté à ce type de données. Celui-ci étend le modèle en constellation classique pour prendre en charge la représentation des textes dans un environnement multidimensionnel. Dans TWM, il est défini une dimension sémantique conçue pour structurer les thèmes des documents et pour hiérarchiser les concepts sémantiques. Pour cela, TWM est adossé à une source sémantique externe, Wikipédia, en l'occurrence, pour traiter la partie sémantique du modèle. De plus, nous avons développé WikiCat, un outil pour alimenter la dimension sémantique de TWM avec des descripteurs sémantiques issus de Wikipédia. Ces deux dernières contributions complètent le framework ETL-Text pour constituer le dispositif d'entreposage des données textuelles. Pour valider nos différentes contributions, nous avons réalisé, en plus des travaux d'implémentation, une étude expérimentale pour chacune de nos propositions. Face au phénomène des données massives, nous avons développé dans le cadre d'une étude de cas des algorithmes de parallélisation des traitements en utilisant le paradigme MapReduce que nous avons testés dans l'environnement Hadoop
The work, presented in this thesis, aims to propose solutions to the problems of textual data warehousing. The interest in the textual data is motivated by the fact that they cannot be integrated and warehoused by using the traditional applications and the current techniques of decision-making systems. In order to overcome this problem, we proposed a text warehouses approach which covers the main phases of a data warehousing process adapted to textual data. We focused specifically on the integration of textual data and their multidimensional modeling. For the textual data integration, we used information retrieval (IR) techniques and automatic natural language processing (NLP). Thus, we proposed an integration framework, called ETL-Text which is an ETL (Extract- Transform- Load) process suitable for textual data. The ETL-Text performs the extracting, filtering and transforming tasks of the original textual data in a form allowing them to be warehoused. Some of these tasks are performed in our RICSH approach (Contextual information retrieval by topics segmentation of documents) for pretreatment and textual data search. On the other hand, the organization of textual data for the analysis is carried out by our proposed TWM (Text Warehouse Modelling). It is a new multidimensional model suitable for textual data. It extends the classical constellation model to support the representation of textual data in a multidimensional environment. TWM includes a semantic dimension defined for structuring documents and topics by organizing the semantic concepts into a hierarchy. Also, we depend on a Wikipedia, as an external semantic source, to achieve the semantic part of the model. Furthermore, we developed WikiCat, which is a tool permit to feed the TWM semantic dimension with semantics descriptors from Wikipedia. These last two contributions complement the ETL-Text framework to establish the text warehouse device. To validate the different contributions, we performed, besides the implementation works, an experimental study for each model. For the emergence of large data, we developed, as part of a case study, a parallel processing algorithms using the MapReduce paradigm tested in the Apache Hadoop environment

APA, Harvard, Vancouver, ISO, and other styles

2

Haider, Zulqarnain. "Rich 2D Mapping." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-39800.

Full text

Abstract:

Fire fighting operations, sometimes, can put the life of fire fighters in threat. For example an environment with potential fire risk and with the presence of gas bottles can cause an explosion, besides other dangers, and certainly put the life of both the victims and fire fighters at risk. Recent advancements in the field of robotics enabled to develop a robotic system which can assist the fire fighters to avoid any human injury and property damage. The live update of the map displayed on the operator’s screen, while teleoperating the robot for search process, can help to properly plan the rescue operation. This thesis details the implementation of a rich 2D mapping system for FUMO2 a fire fighting assistant robot developed by AB Realisator. Rich 2D mapping system produces an occupancy grid map, having the geometry and temperature of the environment with position of fire extinguishers, by fusing different sensor modalities. By rich we mean any type of additional information on top of the standard, geometric only, 2D maps. A sensor fusion method is proposed to integrate the distance measurements reported by a laser range finder, temperature readings acquired by a thermal IR camera and the position of fire extinguishers delivered by visible spectrum camera based object detector. The object detector detects the object in real time and is developed utilizing the technique of cascade of boosted classifiers using MB-LBP features. The proposed system is implemented on both FUMO2 a fire fighting assistant robot and in Gazebo simulator for testing and evaluation.

APA, Harvard, Vancouver, ISO, and other styles

3

Lehnert, Jörg. "Echtzeit-Mustererkennung zum Elektronennachweis mit einem RICH-Detektor in relativistischen Schwerionenkollisionen." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961830247.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Fabbietti, Laura. "Study of the e+e- pair acceptance in the dilepton spectrometer HADES." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970264801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Gedvila, Andrius. "„Ricoh“ spausdintuvo spausdinimo kokybės tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110617_191036-88455.

Full text

Abstract:

Darbe tirtas spalvinio spausdintuvo ,,Ricoh Aficio 3006“ spalvų atgaminimo tikslumas – viena iš svarbiausių jo charakteristikų. Tyrimas atliktas analizuojant keturių spalvų (CMYK) gradacines kreives – zoninių optinių tankių atitiktį etalonui ir gradacinių skalių spausdinimo stabilumą pagal zoninių optinių tankių verčių sklaidą. Spalvų iškraipymas tirtas spektrofotometriniu metodu nustatant spalvų CIE L*a*b* koordinates ir spalvų skirtumus lyginant su etalonu ΔE. Tyrimai atlikti 8 spausdinimo režimams ir keičiant tų režimų nustatymus. Nustatyta, kad spausdintuvas „Ricoh“ spalvas reprodukuoja netiksliai, tačiau spalvų atgaminimo kokybė patenkinama spalvų reprodukavimo aukštos kokybės nereikalaujantiems darbams. Spalvų gradacijos gerokai skiriasi nuo teorinių, bet kai kurie režimai („Gamma“, „Brightness“, „CMYK simulation“) leidžia atspaudų gradacijas priartinti prie teorinių. Nepaisant didelių gradacinių visų spalvų skirtumas nuo teorinių nėra didelis galimai dėl spausdintuvo programinio spalvų koregavimo. Šios programos leidžia koreguoti atspaudų kokybę priklausomai nuo originalo pobūdžio. Išnagrinėjus eksperimentinio tyrimo rezultatus pateikiamos baigiamojo darbo išvados. Darbą sudaro 7 dalys: įvadas, literatūros apžvalga (2 dalys), darbo tikslas ir uždaviniai, tyrimo metodika, išvados ir siūlymai, literatūros sąrašas. Darbo apimtis – 73 p. teksto be priedų, 51 iliustr., 6 lent., 25 bibliografiniai šaltiniai.
It was made an investigation of the „Ricoh Aficio 3006“ color printer color reproduction accuracy - one of the most important characteristics. The study was conducted by analyzing the four-color (CMYK) gradation curves - zonal absorbance compliance with the standard references and gradation according to the stability of the control scale valuže scattering. Colors were measured spectrophotometrically determining the color CIE L*a*b* coordinates and color differences ΔE in comparison with standards. Investigation was carried out in eight printing regimes and their modes. It was found that the printer Ricoh reproduces the color grades inaccurately, but color reproduction quality is sufficient for printing data, that don ot require high accuracy of color reproduction. Color gradations significantly differs from the theoretical, but some regimes (Gamma, Brightness, CMYK simulation) allows to aproach the theoretical values. Despite the high inaccuracy of the gradation the color differences are not so high due to corrections made by software. These programs allow to adjust the print quality depending on the nature of the original. The conclusions are made of the experimental results. Thesis consists of: introduction, literature review (2 parts), research goalsand tasks, research methodology, conclusions and recommendations, references. Work volume - 73 pages of text except appendixes, 51 illustrations, 6 tables., 25 references.

APA, Harvard, Vancouver, ISO, and other styles

6

Chae, Bo Youn. "Discrimination against the rich." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46534.

Full text

Abstract:

Do people punish rich individuals more harshly than middle class individuals? In this dissertation, I investigate whether and how people discriminate against the rich in terms of the punishment of everyday offenses. I propose that people punish a small-time offender more severely when the offender is perceived to be wealthy rather than non-wealthy. Given that people hold a higher behavioral standard for the wealthy, a wealthy (vs. non-wealthy) individual violates a rule, people perceive a greater degree of a fall from the behavioral standard and administer a more severe punishment to the offender. A set of six empirical studies substantiates the proposed discrimination-against-the-rich effect and validates the underlying mechanism. Furthermore, the findings show that people do not discriminate against the rich when no rule violation is observed. The findings also indicate a secondary effect whereby observing the delivery of punishment to a wealthy (vs. non-wealthy) offender increases the observer’s fairness perception. Finally, the generalizability of the discrimination-against-the-rich effect is tested, and the results show that the effect is moderated by the observer’s income level.

APA, Harvard, Vancouver, ISO, and other styles

7

Shongwe, Musa Sipho. "Metal-rich metallaborane clusters." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315214.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Dod?, Adriano Alves. "On rich modal logics." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18688.

Full text

Abstract:

Made available in DSpace on 2015-03-03T15:47:48Z (GMT). No. of bitstreams: 1 AdrianoAD_DISSERT.pdf: 771338 bytes, checksum: 06adea5feab9914c5a48eb146511b556 (MD5) Previous issue date: 2013-11-19
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
I thank to my advisor, Jo?o Marcos, for the intellectual support and patience that devoted me along graduate years. With his friendship, his ability to see problems of the better point of view and his love in to make Logic, he became a great inspiration for me. I thank to my committee members: Claudia Nalon, Elaine Pimentel and Benjamin Bedregal. These make a rigorous lecture of my work and give me valuable suggestions to make it better. I am grateful to the Post-Graduate Program in Systems and Computation that accepted me as student and provided to me the propitious environment to develop my research. I thank also to the CAPES for a 21 months fellowship. Thanks to my research group, LoLITA (Logic, Language, Information, Theory and Applications). In this group I have the opportunity to make some friends. Someone of them I knew in my early classes, they are: Sanderson, Haniel and Carol Blasio. Others I knew during the course, among them I?d like to cite: Patrick, Claudio, Flaulles and Ronildo. I thank to Severino Linhares and Maria Linhares who gently hosted me at your home in my first months in Natal. This couple jointly with my colleagues of student flat Fernado, Don?tila and Aline are my nuclear family in Natal. I thank my fianc?e Lucl?cia for her precious a ective support and to understand my absence at home during my master. I thank also my parents Manoel and Zenilda, my siblings Alexandre, Paulo and Paula.Without their confidence and encouragement I wouldn?t achieve success in this journey. If you want the hits, be prepared for the misses Carl Yastrzemski
Esta disserta??o trata do enriquecimento de l?gicas modais. O termo enriquecimento ? usado em dois sentidos distintos. No primeiro deles, de fundo sem?ntico, propomos uma sem?ntica difusa para diversas l?gicas modais normais e demonstramos um resultado de completude para uma extensa classe dessas l?gicas enriquecidas com m?ltiplas inst?ncias do axioma da conflu?ncia. Um fato curioso a respeito dessa sem?ntica ? que ela se comporta como as sem?nticas de Kripke usuais. O outro enriquecimento diz respeito ? expressividade da l?gica e se d? por meio da adi??o de novos conectivos, especialmente de nega??es modais. Neste sentido, estudamos inicialmente o fragmento da l?gica cl?ssica positiva estendido com uma nega??o modal paraconsistente e mostramos que essa linguagem ? forte o suficiente para expressar as linguagens modais normais. Vemos que tamb?m ? poss?vel definir uma nega??o modal paracompleta e conectivos de restaura??o que internalizam as no??es de consist?ncia e determina??o a n?vel da linguagem-objeto. Esta l?gica constitui-se em uma L?gica da Inconsist?ncia Formal e em uma L?gica da Indetermina??o Formal. Em tais l?gicas, com o objetivo de recuperar infer?ncias cl?ssicas perdidas, demonstram-se Teoremas de Ajuste de Derivabilidade. No caso da l?gica estendida com uma nega??o paraconsistente, se removermos a implica??o ainda lidaremos com uma linguagem bastante rica, com ambas nega??es paranormais e seus respectivos conectivos de restaura??o. Sobre esta linguagem estudamos a l?gica modal normal minimal definida por meio de um c?lculo de Gentzen apropriado, ? diferen?a dos demais sistemas estudados at? ent?o, que s?o apresentados via c?lculo de Hilbert. Em seguida ap?s demonstrarmos a completude do sistema dedutivo associado a este c?lculo, introduzimos algumas extens?es desse sistema e buscamos Teoremas de Ajuste de Derivabilidade adequados

APA, Harvard, Vancouver, ISO, and other styles

9

Georgiou, George Cleovoulos. "Nitrogen-rich oximic complexes." Thesis, London Metropolitan University, 1988. http://repository.londonmet.ac.uk/3051/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Dodó, Adriano Alves. "On Rich Modal Logics." reponame:Repositório Institucional da UFC, 2013. http://www.repositorio.ufc.br/handle/riufc/9589.

Full text

Abstract:

Submitted by Aline Mendes (alinemendes.ufc@gmail.com) on 2014-10-30T16:41:14Z No. of bitstreams: 1 2013_dis_aadodó.pdf: 766766 bytes, checksum: fe9ca34054b8f516e6a8b7c29863d627 (MD5)
Approved for entry into archive by Aline Mendes(alinemendes.ufc@gmail.com) on 2014-10-30T16:43:23Z (GMT) No. of bitstreams: 1 2013_dis_aadodó.pdf: 766766 bytes, checksum: fe9ca34054b8f516e6a8b7c29863d627 (MD5)
Made available in DSpace on 2014-10-30T16:43:23Z (GMT). No. of bitstreams: 1 2013_dis_aadodó.pdf: 766766 bytes, checksum: fe9ca34054b8f516e6a8b7c29863d627 (MD5) Previous issue date: 2013
This thesis is about the enrichment of modal logics. We use the term enrichment in two distinct ways. In the first of them, it is a semantical enrichment. We propose a fuzzy semantics to di erent normal modal logics and we prove a completeness result for a generous class of this logics enriched with multiple instances of the axiom of confluence. A curious fact about this semantics is that it behaves just like the usual boolean-based Kripke semantics for modal logics. The other enrichment is about the expressibility of the logic and it occurs by means of the addition of new connectives, essentially modal negations. In this sense, firstly we study the positive fragment of classical logic extended with a paraconsistent modal negation and we show that this language is su ciently strong to express the normal modal logics. It is also possible to define a paracomplete modal negation and restoration connectives that internalize at the level object-language the notions of consistency and determinedness. This logic constitutes a Logic of Formal Inconsistency and a Logic of Formal Undeterminedness.In such logics, with the objective of recovering lost inferences of classical logic, Derivability Adjustment Theorems are proved. In the case of the logic with one paraconsistent negation, if we remove the implication we still have a rich language, with both paranormal negations and its respective connectives of restoration. In this logic we study the minimal normal modal logic defined by means of a Gentzen calculus, differently of the others modal systems studied, which are presented by means of Hilbert calculus. Next, after we prove a ompleteness result of the deductive system associated to this calculus, we present some extensions of this system and we look for appropriate Derivability Adjustment Theorems.
Esta dissertação trata do enriquecimento de lógicas modais. O termo enriquecimento é usado em dois sentidos distintos. No primeiro deles, de fundo semântico, propomos uma semântica difusa para diversas lógicas modais normais e demonstramos um resultado de completude para uma extensa classe dessas lógicas enriquecidas com múltiplas instâncias do axioma da confluência. Um fato curioso a respeito dessa semântica é que ela se comporta como as semânticas de Kripke usuais. O outro enriquecimento diz respeito à expressividade da lógica e se dá por meio da adição de novos conectivos, especialmente de negações modais. Neste sentido, estudamos inicialmente o fragmento da lógica clássica positiva estendido com uma negação modal paraconsistente e mostramos que essa linguagem é forte o suficiente para expressar as linguagens modais normais. Vemos que também é possível definir uma negação modal paracompleta e conectivos de restauração que internalizam as noções de consistência e determinação a nível da linguagem-objeto. Esta lógica constitui-se em uma Lógica da Inconsistência Formal e em uma Lógica da Indeterminação Formal. Em tais lógicas, com o objetivo de recuperar inferências clássicas perdidas, demonstram-se Teoremas de Ajuste de Derivabilidade. No caso da lógica estendida com uma negação paraconsistente, se removermos a implicação ainda lidaremos com uma linguagem bastante rica, com ambas negações paranormais e seus respectivos conectivos de restauração. Sobre esta linguagem estudamos a lógica modal normal minimal definida por meio de um cálculo de Gentzen apropriado, à diferença dos demais sistemas estudados até então, que são apresentados via cálculo de Hilbert. Em seguida após demonstrarmos a completude do sistema dedutivo associado a este cálculo, introduzimos algumas extensões desse sistema e buscamos Teoremas de Ajuste de Derivabilidade adequados.

APA, Harvard, Vancouver, ISO, and other styles

11

Baker, Lisa M. "How scientific experiments are designed : problem solving in a knowledge-rich, error-rich environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0023/NQ50105.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Buchanan, Sean G. St C. "Studies of leucine-rich repeats and a novel, Drosophila, embryonic leucine-rich repeat protein." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Cundell, Jill Hannah. "Evaluation of the characteristics of leucocyte-rich platelet-rich plasma from participants with diabetes." Thesis, Ulster University, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.692821.

Full text

Abstract:

The aim of this research was to investigate the characteristics of leucocyte- rich platelet-rich plasma (LR-PRP) from three groups of participants; healthy diabetics, healthy controls and a group of diabetics with an active foot ulcer. ELISAs were used to measure the concentrations of a number of intrinsic growth factors in LR-PRP. No significant differences were found between groups for the levels of any growth factor. The pH and redox potential of the unsupplemented LR-PRP from the three groups of study participants were determined using a hand-held ArrowDOX pH/redox meter. There was no significant difference in the pH values or redox potential found between the three groups of participants. Experiments using a well diffusion assay and seeded lawns of bacteria frequently identified in diabetic foot infections were conducted to investigate antimicrobial properties of either pure or supplemented LRPRP. The inherent antimicrobial properties of LR-PRP were measured. Some plates which had lawns of Staphylococcus aureus, MRSA, Streptococcus pyogenes, Proteus vulgaris and E.coli had zones of inhibition caused by LR- PRP from all three study groups. Antibiotics (co amoxiclav, clindamycin, doxycycline and pip I taz) frequently used to manage diabetic foot infections were used to supplement the LR-PRP. Zones of inhibition were found for the dilutions in LR-PRP for some of the antibiotics against some bacteria, which were greater than the zones of inhibition obtained for LR - PRP and Ringers solution alone. Some differences were found in size of the ZOI between participant groups. The LR -PRP encouraged enhanced bacterial growth on the plates with Pseudomonas aeruginosa indicating that clinicians should consider assessing the wound for the presence of this organism prior to application. Enhanced bacterial growth rather than inhibited bacterial growth was found in all three study groups, with all challenge bacteria used when LR-PRP was supplemented with insulin.

APA, Harvard, Vancouver, ISO, and other styles

14

Wilson, Brett Eugene. "Rich visualizations from discrete primitives /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Watson, Mark Wayne. "Cysteine-rich proteins of chlamydia." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385342.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Giuliani, Enrico. "Sviluppo di Rich Internet Application." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1439/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Staniland, Sarah S. "Sulphur-rich molecular magnetic materials." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/12990.

Full text

Abstract:

The work within this thesis is concerned with several different magnetic systems all involving materials that are rich in sulphur and are thus predicted to have strong magnetic coupling through these sulphur atoms. Firstly, a range of molecular salt materials of [dithiazolyl]_x[M(dithiolene)₂] were synthesised and their magnetic behaviour analysed. Dithiolene complex salts of [BDTA]⁺ [2]-[6] were found to have a mainly mixed anion-cation stacked structural motif and show a number of interesting magnetic properties, such as an almost perfect one dimensional antiferromagnetic chain system ([BDTA]₂[Cu(mnt)₂ [2], as well as the conducting charge transfer salt [BDTA][Ni(dmit)₂]₂ [3] that is the first example of the [BDTA]⁺ cation behaving as an open shell cation. The [BDTA]₂[Fe(tdas)₂Cl] salt [5] has the first mixed stacking structural motif of this anion (as it usually dimerises) and this material was found to be paramagnetic. The paramagnetic radical dithiazolyl cation [BBDTA]⁺ was also co-precipitated with dithiolene complexes to create magnetic salts [11]-[15]. These all showed mixed magnetic effects with some unusual magnetic interactions occurring. [BDTA]⁺ was also co-crystallised with MC1₄^2- anions to form molecular materials containing two dimensional magnetic structure with a square lattice magnetic pathway. This magnetic mechanism provides ideal materials for the study of ground state quantum magnetic effects that are thought to be related to the fundamental mechanism of superconductivity. This work also contains the study of the non interacting magnetic molecular thiophosphine complexes of the form [M((SPR¹R²)₂N)₂] (M = Mn, Co, Ni, R¹ = R² = Ph, ⁱPr and R¹=Ph and R²=ⁱPr) which behave as simple paramagnets ([16]-[24]). All M = Mn and Co complexes were found to be simple paramagnetic materials with a strong ligand field splitting.

APA, Harvard, Vancouver, ISO, and other styles

18

Engl, Lisa [Verfasser], Björn [Akademischer Betreuer] [Gutachter] Risch, and Jürgen [Akademischer Betreuer] [Gutachter] Roth. "Bedeutung des Protokollierens für den naturwissenschaftlichen Erkenntnisprozess / Lisa Engl ; Gutachter: Björn Risch, Jürgen Roth ; Björn Risch, Jürgen Roth." Koblenz, 2017. http://d-nb.info/1133493297/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Engl, Lisa [Verfasser], Björn Akademischer Betreuer] [Gutachter] Risch, and Jürgen [Akademischer Betreuer] [Roth. "Bedeutung des Protokollierens für den naturwissenschaftlichen Erkenntnisprozess / Lisa Engl ; Gutachter: Björn Risch, Jürgen Roth ; Björn Risch, Jürgen Roth." Koblenz, 2017. http://nbn-resolving.de/urn:nbn:de:kola-14476.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Kgogo, Thabo C. "Well test analysis of low permeability medium-rich to rich gas condensate homogeneous and layered reservoirs." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6856.

Full text

Abstract:

This study investigates near-wellbore effects during well testing in low permeability, single- and multi-layered, medium-rich to rich, gas condensate reservoirs. Theoretical results obtained from compositional simulations are validated with actual well test data. We first study well test behaviours for a range of gas condensate fluids with increasing condensate to gas ratios (CGR), from lean to medium-rich to rich. We verify that, during a drawdown below the dew point pressure, a condensate bank forms around the wellbore for all fluids studied. We show that, in the case of a medium-rich gas, as pressure increases above the dew point pressure in a subsequent build up, part of the condensate bank closer to the well dissolves into the gas, with the fluid returning to being a single-phase gas. This is different from what happens with rich gas, where the bank disappears completely; and with lean gas, where condensate saturation at the end of a drawdown and in the subsequent build up are very similar. Lean and medium-rich gas condensate fluids yield three-region radial composite derivative behaviours corresponding to dry gas away from the well, condensate bank, and capillary number effects in the immediate vicinity of the well. Only two-region radial composite behaviours are created in the case of rich gas fluids, as rates required to see capillary number effects are not reached in practice. We then study layered systems and show that composite behaviour due to condensate bank and a multi-layer behaviour are superimposed, with the condensate bank appearing on top of multi-layer effects. In addition, the production rate ratio of the most permeable layer rate to the total rate tends to one as the least permeable layer is choked by its condensate bank. We also investigated gravity effects and conclude that gravity has little impact on pressure response once the condensate bank develops near the wellbore and in particular does not create a partial penetration behaviour. Lastly, we show that drilling horizontal wells and hydraulically-fracturing vertical wells improve well productivity when pressure is below the dew point pressure. Condensate drop-out effects are minimized when wells are fractured prior to being produced.

APA, Harvard, Vancouver, ISO, and other styles

21

Holme, Asbjørn. "Optimization of Liquid-Rich Shale Wells." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23612.

Full text

Abstract:

The development of horizontal well technology and hydraulic fracturing have made production from shale and other low permeable rocks possible and revolutionized the oil and gas business. Shales produce typically with very low oil-gas ratios (high gas-oil ratios). For liquid-rich shales, it is shown that there is a significant difference between the initial solution oil-gas ratio and producing oil-gas ratio. In fact, what you produce at the surface is not the same as what you have in the reservoir. Shale wells produce with a low bottomhole pressure to maximize early gas rates and early rate of return. This comes with a drawback of reduced oil recovery. The combination of horizontal wells with hydraulically induced fractures and low permeability reduces the producing oil-gas ratio significantly compared to the initial in-solution oil-gas ratio. For liquid-rich shale gas condensate wells, the majority of the oil that is produced are produces as oil that is in solution in the gas phase. Little or no oil are produced as free oil. The fractures creates large volumes for the hydrocarbons to flow through and as the pressure drops below the dewpoint pressure near the wells, the build up of oil saturation is insufficient to become mobile oil in the near-fracture region. Most of the oil that condenses out of solution in the near-fracture region, are therefore unproduced resulting in a significant lower producing oil-gas ratio than the initial solution oil-gas ratio. The producing oil-gas ratio is directly linked to the producing bottomhole pressure. As the majority of the oil are produced as solution oil, the producing oil-gas ratio as a function of bottomhole pressure, will behave similar to the in solution oil-gas ratio of the fluid as a function of pressure. At higher pressures the gas contains more oil, and hence producing at a higher bottomhole pressure the gas will contain more oil as it is produced to the well resulting in a higher oil-gas ratio. \par Producing at a bottomhole pressure equal to the dewpoint pressure eliminates the effect of lost oil in the near-well region and the producing oil-gas ratio are therefore equal to the initial solution oil-gas ratio. Producing at a higher bottomhole pressure will come at the cost of reduced gas production. As oil is a more valuable commodity, the increased oil recovery at the expense of reduced gas recovery will in fact increase the net present value of the well. Optimizing the production in terms of finding the right bottomhole pressure may double the oil recovery of the well and increase the net present value of the revenues from the oil and gas sale by as much as 25 \%. Even though the increased oil recovery come at the expense of reduced gas recovery, the gas is not lost. When the rates at producing at a high bottomhole pressure are not economical anymore, the bottomhole pressure can be lowered. The gas production then quickly catches up with the production coming from a well that have produced at a constant low bottomhole pressure. This thesis show that producing at a higher bottomhole pressure is the best economical choice for a wide range of cases. It is applicable for all gas condensate systems as well as near-critical and volatile oil systems. A significant low permeability as well as a significant degree of undersaturation (high initial pressure) are required for the method to be economical beneficial.

APA, Harvard, Vancouver, ISO, and other styles

22

Acosta, Reyes Francisco Javier. "Structural studies of AT-rich DNA." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/392653.

Full text

Abstract:

Non-coding DNA is rich in adenines and thymines. Their unique properties, such as high polymorphism, flexibility, transitional states that lead to DNA hairpin formation and the possibility to adopt either Watson-Crick or Hoogsteen base pairing conformations, in conjunction with its distribution in genomes, suggest the possibility of a structural role. In spite of that, the available structural information for AT-rich oligonucleotides in databases such as Protein Data Bank (PDB) and Nucleic Acids Data Bank (NDB) is very limited in comparison to oligonucleotides of high CG content. These facts have motivated us to undertake the study of the structural characteristics specific for AT-rich oligonucleotides. X-ray crystallography was used for the study of AT-rich oligonucleotides with particular sequences, such as a palindromic sequence suitable for the formation of a DNA hairpin, alternating-AT and A-tracts. Additionally, dynamic light scattering was used to identify the most suitable conditions for initial crystallization trials. The unique properties of AT-rich sequences such a high polymorphism and flexibility constitute ideal features for their possible structural role, but also present difficulties for crystal organization, as required for X-ray crystallography. In several cases, only poor diffracting crystals were obtained. The following structural features were identified in the AT-rich oligonucleotides studied by us: Crystals of the oligonucleotide d((AT)3T3A(AT)3) in a DNA hairpin conformation have been obtained. The structure of the loop appears to be highly variable; as a result, the crystals have low resolution. A tentative model of the hairpin structure has been proposed. The d(A4T4) octamer was crystallized as a complex with the CD27 drug. This drug has previously demonstrated a high antiprotozoal activity, in particular against Plasmodium falciparum and Trypanosoma brucei. The structure obtained shows how the CD27 drug fills completely the minor groove and interacts with molecules of stacked oligonucleotides and with the backbone of neighboring duplexes, stabilizing a complex organization. The elevated number of occurrences of the motif A4 in the genomes of Plasmodium falciparum and particularly in the kDNA of Trypanosoma brucei represents a suitable target for the CD27 drug. The d(CG(AT)4CG)2 dodecamer in presence of Ni2+ crystallizes in the typical pseudo four-way helix-helix junction configuration, with extra-helical and terminal guanines coordinated to nickel. A bis-coordination of Ni2+ with two stacked helical guanines was identified in the structure of d(CG(AT)4CG)2 in the presence of Ni2+ and the CD27 drug. The oligonucleotide d(A6T6)2 in the presence of Mn2+ and the S1010 drug in the crystallization conditions acquires a coiled-coil conformation. The following structures were determined as part of a collaboration in several other projects: The structure of the oligonucleotide d(AATAAATTTATT)2 in presence of different ions exhibits the typical high polymorphism of AT-rich DNA. The ions present in the crystallization conditions modulate the organization of duplexes, most likely through changes in the ionic atmosphere around the DNA duplexes. The structure of the oligonucleotide d(ATTAAT)2 in Hoogsteen conformation demonstrates that any all-AT sequence may adopt the Hoogsteen conformation under appropriate conditions. The structures of d(CGAATTAATTCG)2, d(ATATCGATAT)2 and d(ATATGCATAT)2 in the presence of ligands (ions, peptide or protein), were successfully determined. In the case of d(ATATGCATAT)2 a coiled-coil conformation was found in the presence of Mg2+.
El DNA no codificant es ric en adenines i timines (AT). Les seves propietats úniques com alt polimorfisme, flexibilitat, estats de transició que porten a la formació d'estructures bucle i la possibilitat d'adoptar conformacions de parells de bases Watson-Crick o Hoogsteen, conjuntament amb la seva distribució en genomes, suggereixen la possibilitat d'un rol estructural. Malgrat això, la informació disponible per oligonucleòtids rics en AT en bases de dades (PDB i NDB) és molt limitada en comparació amb la dels oligonucleòtids d'alt contingut en citosina i guanina. Aquests fets ens han motivat per emprendre l'estudi de les característiques estructurals d'oligonucleòtids rics en AT. La cristal.lografia de raigs X s'ha fet servir per l'estudi d'oligonucleòtids rics en AT de seqüències concretes, com ara la seqüència palindròmica per a la formació d'estructures bucle del DNA, l'alternant AT i la d'adenines consecutives. A més, es va utilitzar la tècnica de dispersió dinàmica de llum per identificar les condicions òptimes per a les proves inicials de cristal.lització. Les propietats úniques de les seqüències riques en AT com l'alt polimorfisme i la flexibilitat constitueixen propietats ideals pel possible rol estructural, però d'altra banda comporten dificultats per a l'organització molecular requerida per la cristal·lografia de raigs X. En diversos casos, només es van obtenir cristalls amb difraccions desordenades i de baixa resolució. Dels oligonucleòtids rics en AT estudiats, es van identificar les següents característiques estructurals: Amb l'oligonucleòtid d((AT)3T3A(AT)3) es van obtenir cristalls amb la conformació bucle. L'estructura del bucle es mostra altament variable; com a resultat, els cristalls presenten baixa resolució. Es proposa un model temptatiu del bucle. Es va cristal.litzar el complex de l'octàmer d(A4T4) amb el fàrmac CD27. Aquest fàrmac ha demostrat prèviament una alta activitat antiprotozoària, en particular pel Plasmodium falciparum i pel Trypanosoma brucei. L'estructura resolta mostra com el CD27 omple el solc estret completament i interactua amb molècules d'oligonucleòtics apilats i amb la cadena de fosfats dels dúplexs veïns, estabilitzant una organització complexa. L'elevat nombre d'incidències del motiu A4 en els genomes del Plasmodium falciparum i particularment en el k-DNA del Trypanosoma brucei, representa un lloc d'unió adient per el CD27. El dodecàmer d(CG(AT)4CG)2 en presència de Ni2+ cristal·litza en la típica configuració en pseudo-intersecció hèlix-hèlix de quatre vies amb les guanines extra-helicoïdals i terminals coordinades amb níquel. Es va identificar una doble coordinació de Ni2+ amb dos guanines apilades en l'estructura de d(CG(AT)4CG)2 en presència del fàrmac CD27. L'oligonucleòtid d(A6T6)2 en presència de Mn2+ i del fàrmac S1010 adopta una conformació en superhèlix (coiled-coil). Les següents estructures es van resoldre en col·laboració amb altres projectes: Les estructures de l'oligonucleòtid d(AATAAATTTATT)2 obtingudes en presència de diferents ions mostra el típic polimorfisme del DNA ric en AT. Els ions presents modulen l'organització de dúplexs, probablement degut a canvis en la atmosfera iònica al voltant del DNA. L'estructura de l'oligonucleòtid d(ATTAAT)2 en conformació Hoogsteen indica que qualsevol seqüència completament AT podria adoptar la conformació Hoogsteen en condicions adients. L'estructura dels oligonucleòtids d(CGAATTAATTCG)2, d(ATATCGATAT)2 i d(ATATGCATAT)2 en presència de lligands (ions, pèptid i proteïna), van ser resoltes amb èxit. En el cas de d(ATATGCATAT)2, es va trobar una conformació en superhèlix en presència de Mg2+.

APA, Harvard, Vancouver, ISO, and other styles

23

Berentzen, Ingo. "Interactions with gas-rich barred galaxies." Doctoral thesis, [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971082251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Kabel, Suzanna Catharina. "Knowledge-rich indexing of learning objects." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2004. http://dare.uva.nl/document/74617.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Joyce-Stringer, Shanae. "Azerbaijan: Oil-Rich Yet War-Torn." Honors in the Major Thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/765.

Full text

Abstract:

This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf
Bachelors
Arts and Sciences
Political Science

APA, Harvard, Vancouver, ISO, and other styles

26

Reed, Alan Thomas. "Decay studies of neutron-rich nuclei." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367175.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Colless, M. M. "A dynamical study of rich clusters." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384439.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Netherland, Tyler Elias. "An introduction to Rich Services/Erlang." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1469583.

Full text

Abstract:

Thesis (M.S.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed October 22, 2009). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 146-147).

APA, Harvard, Vancouver, ISO, and other styles

29

Khosh, Sokhan Monfared Siavash. "Microporoelastic modeling of organic-rich shales." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/97797.

Full text

Abstract:

Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 175-183).
Due to their abundance, organic-rich shales are playing a critical role in re-defining the world's energy landscape leading to shifts in global geopolitics. However, technical challenges and environmental concerns continue to contribute to the slow growth of organic-rich shale exploration and exploitation worldwide. The engineering and scientific challenges arise from the extremely heterogeneous and anisotropic nature of these naturally occurring geo-composites at multiple length scales. Specifically, the anisotropic poroelastic behavior of organic-rich shales becomes of critical importance for petroleum engineers. Thus, the focus of this thesis is to capture mechanisms of first-order contribution to the effective anisotropic poroelasticity of organic-rich shales which can pave the way for more efficient and effective exploration and exploitation. We introduce an original approach for micromechanical modeling of organic-rich shales which accounts for the effect of organic maturity on the overall anisotropic poroelasticity through morphology considerations. This morphology contribution is captured by means of an effective media theory that bridges the gap between immature and mature systems through the choice of the system's micro-texture; namely a matrix-inclusion morphology (Mori-Tanaka) for immature systems and a polycrystal/ granular morphology for mature systems. Also, we show that interfaces play a role on the effective elasticity of mature organic-rich shales. The models are calibrated by means of ultrasonic pulse velocity measurements of elastic properties and validated by means of lab measured nanoindentation data. Sensitivity analyses using Spearman's Partial Rank Correlation Coefficient show the importance of porosity and Total Organic Carbon (TOC) as key input parameters for accurate model predictions. These models' developments provide a mean to define a "unique" set of clay elasticity. They also highlight the importance of the depositional environment, burial and diagenetic processes on overall mechanical and poromechanical behavior of organic-rich shales.
by Siavash Khosh Sokhan Monfared.
S.M.

APA, Harvard, Vancouver, ISO, and other styles

30

Lasky, Alan. "Slipstream, a data rich production environment." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/68242.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Dai, Yu. "Observational Study of Dust-Rich Quasars." Thesis, Boston College, 2013. http://hdl.handle.net/2345/3319.

Full text

Abstract:

Thesis advisor: Kevin Bedell
Thesis advisor: Giovanni Fazio
One of the most exciting observational breakthrough in the past decades is the discovery of the tight correlations between supermassive black holes (SMBHs) and the galaxies they reside in the `host galaxies'. This finding is surprising, as the event horizon of a typical SMBH (about 10^8 solar masses) is about 3 times 10^8 km, while the galaxy is usually about 10^17 km across, a billion times larger. How could such a small object affect something so big? SMBHs appear to be at the center of most massive galaxies, and how they interact with the host galaxies has become a fundamental question in astrophysics. To understand how galaxies and SMBHs evolve together, we must first understand the statistical properties of these systems. Quasars, the bright manifestation of the most active SMBHs, serve as good candidate for this study. Using infrared space telescopes--Spitzer and Herschel, we discovered a population of `dust-rich' quasars at intermediate redshift (z about 1.5, about 9 billion years ago) in the Lockman Hole field. We study the statistical properties of these mid-infrared (MIR) and optically-selected quasars via optical and infrared observations. I present the MIR-selected quasar sample (Chapter 2), their addition to the completeness of optically-selected sample (Chapter 3), and their physical properties, i.e., their atomic emission and absorption features, SMBH masses, and Eddington ratios--an indicator of how fast the SMBH is growing (Chapter 4). We find a significant and constant (20%) fraction of extended objects previously missed optical color selection. The SMBH mass shows evidence of downsizing--they are more massive in the early universe, though their Eddington ratios remain constant to between now and about 11 billion years ago (0 lower than z lower than 3). In the past 7 billion years (z lower than 1), quasars with extended morphology show systematically lower Eddington ratios than the point-like quasars, indicating they have less active SMBHs. We also study the spectral energy distributions (SEDs) of a subsample of `cold-dust-rich' quasars (Chapter 5) that show evidence of ongoing star formation--an indicator of how fast the host galaxy is growing. These quasars are the younger and fainter counterparts of quasars previously observed in the sub-millimeter band, as both are bright in the far-infrared, where star formation dominates. For the most luminous cold-dust-rich quasars, however, their infrared SED suggests that the dust is heated by quasars, instead of star formation in the host galaxies. Chapter 6 gives a summary of this study and comment on the significance of the dust-rich quasars in bridging the gap between SMBHs with their host galaxies. Finally some avenues for future work are discussed
Thesis (PhD) — Boston College, 2013
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics

APA, Harvard, Vancouver, ISO, and other styles

32

Wills, Samuel Edward. "Macroeconomic policy in resource-rich economies." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:a7050812-cec5-47f6-912b-d00252c3d69f.

Full text

Abstract:

This thesis considers how fiscal and monetary policy should be conducted in resourcerich economies. It consists of three papers addressing: whether governments should spend, save or invest volatile oil income; the assets they should save in; and how monetary policy should respond. The first, “Eight principles for managing resource wealth”, shows that capital-scarce countries should save relatively less against oil price volatility, and invest more in domestic capital. They also should prepare for volatility in advance, and treat savings as a source of income rather than a temporary buffer. To show this the paper develops a framework that nests a variety of existing results, which are presented in eight principles. The second, “The Elephant in the Ground: Oil extraction and asset allocation in sovereign wealth funds”, shows that governments should use sovereign wealth funds to offset oil price risk, extract oil faster if its price is pro-cyclical, and use precautionary savings to manage any residual volatility. To do this it combines three strands of literature for the first time: on continuous-time portfolio theory, oil extraction and precautionary savings. The third, “Optimal monetary responses to oil discoveries”, addresses the anticipation effects around an oil discovery. It shows that the terms of trade will need to appreciate twice: once when oil is discovered and consumers anticipate future revenues; and again when the government begins spending the revenues. Oil wealth will give the monetary authority an incentive to appreciate the terms of trade, in addition to stabilising domestic inflation and the output gap. Optimal policy is well-approximated by a standard monetary rule that also responds to expected changes in the natural level of output.

APA, Harvard, Vancouver, ISO, and other styles

33

Lindgren, Karin E. "The Histidine-rich Glycoprotein in Reproduction." Doctoral thesis, Uppsala universitet, Institutionen för kvinnors och barns hälsa, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300769.

Full text

Abstract:

Infertility affects 15% of reproductive-aged couples. The milieu surrounding the growing embryo is of outmost importance, and should be optimised during in vitro fertilisation (IVF). Many biological processes, such as angiogenesis, coagulation, and immune processes need to be well regulated for a pregnancy to occur and progress normally. Histidine-rich glycoprotein (HRG) is a plasma protein that regulates components of these systems by building complexes with various ligands. A single nucleotide polymorphism (SNP) in HRG, denoted HRG C633T, seem to be of importance for IVF treatment outcomes. The aim of this thesis was to further investigate the proposed human fertility effects of the HRG C633T SNP. According to the findings of this thesis, the HRG C633T genotype is associated with primary recurrent miscarriage. Male HRG C633T genotype is associated with semen characteristics in infertile men, and pregnancy rates following IVF. However, the distribution of the HRG C633T SNP does not differ between infertile and fertile couples. We further examined the role of the region surrounding the HRG C633T SNP for regulation of endometrial angiogenesis and human embryo development. The region affects primary endometrial endothelial cell migration, proliferation and tube-formation in vitro but does not appear to affect human embryo development. No effect of the HRG peptide was noted on the secretome of human embryos. However, early embryos secrete proteins into the surrounding culture media and the level of secretion of VEGF-A, IL-6, EMMPRIN and PlGF is greater in embryos of higher developmental stages. In conclusion, the HRG C633T genotype appears to play a role only if infertility is established. The region surrounding HRG C633T SNP is of relevance in vitro for regulation of human endometrial endothelial cell angiogenesis. To predict which embryos to transfer in IVF, we have highlighted a number of proteins of interest for further investigation.

APA, Harvard, Vancouver, ISO, and other styles

34

Bajada, Josef. "Temporal planning for rich numeric contexts." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/temporal-planning-for-rich-numeric-contexts(531df439-02ca-4d7c-8705-9f82a2aa4d51).html.

Full text

Abstract:

Real-world planning problems often feature complex temporal and numeric characteristics. These include concurrent activities and also effects that involve continuous change. This work presents the formalism behind reasoning with required concurrency that involves continuous change in temporal planning problems, together with a set of techniques to solve a class of tasks that to date are hard to solve with current state-of-the-art temporal planners. The motivation for this work is scenarios where planning actions have rich numeric effects on some physical system. One such example is automated demand dispatch for electricity provision, where actions that fulfil customer requirements have an effect on various metrics, such as wattage or costs, which could be subject to operational or commercial constraints. An algorithm that handles discrete interference of linear continuous effects, referred to as constants in context, is presented. This technique allows discrete actions to update the rate of change of a continuous effect taking place concurrently. This work builds on techniques used in current temporal planners that make use of linear programming, and also extends the heuristic to guide the search to a solution. This algorithm was implemented in a new temporal and numeric planner called DICE and evaluated with some benchmark domains. PDDL, the current de facto standard language for planning domains and corresponding planning tasks, was extended to support interactions with external class modules. The proposed extension, PDDLx, defines a generic planner-solver interface for both discrete and continuous effects. This enables planners that implement this interface to interact with external solvers and incorporate context-specific effects in a black-box fashion, enabling complex numeric behaviour to be encapsulated within such modules. Non-linear monotonic continuous effects, defined in the proposed PDDLx extension, are integrated within the planner using a non-linear iterative convergence algorithm. It searches for a linear approximation within an acceptable configurable error margin, which is then used within the linear program computed for each temporal state. This algorithm proves to be effective in various domains where non-linear continuous behaviour is prevalent. This technique was implemented as an extension to DICE, called uNICOrn, which performs non-linear iterative convergence for continuous effects whose duration needs to be determined by the planner. uNICOrn was also evaluated with some benchmark non-linear domains. A case study on the automated demand dispatch domain is presented to demonstrate the use of the planning algorithms proposed in this thesis. Linear and non-linear planning problems are evaluated and the performance of uNICOrn on these problem instances was analysed. This work builds on current techniques used for temporal planning with continuous numeric behaviour using linear programming, and enhances them to remove some of their intrinsic limitations. The result is a set of algorithms that are more effective in solving real-world applications that involve continuous change and rich numeric behaviour.

APA, Harvard, Vancouver, ISO, and other styles

35

Cabral, Rodrigo Espinosa. "Poetry and politics in Adrienne Rich." Florianópolis, SC, 2001. http://repositorio.ufsc.br/xmlui/handle/123456789/81446.

Full text

Abstract:

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Letras/Inglês e Literatura Correspondente.
Made available in DSpace on 2012-10-19T04:07:52Z (GMT). No. of bitstreams: 0Bitstream added on 2014-09-25T21:44:27Z : No. of bitstreams: 1 184732.pdf: 2618142 bytes, checksum: 7b7111efe5e8bc113846d9109f093496 (MD5)
Adrienne Rich publicou 17 livros de poesia e 4 de ensaios. Desde 1951 sua produção literária tem crescentemente estimulado debates críticos e controvérsias, devido à sua poética intrinsecamente relacionada a movimentos de libertação das mulheres, pacifismo, anti-semitismo e outras questões sociais. Este estudo tem por objetivo analisar as relações entre poesia e política na poesia de Rich de 1951 a 1999, tentando acompanhar seu desenvolvimento. Para tanto, o primeiro capítulo discute as idéias de Mikhail Bakhtin e Theodor Adorno sobre lírica e sociedade em relação às de Rich sobre o assunto. Os capítulos posteriores analisam os poemas dela em diálogo com esse embasamento teórico, entrevistas e ensaios de Rich, assim como críticas sobre a obra dela.

APA, Harvard, Vancouver, ISO, and other styles

36

Oliveira, Marcia Gomes de. "Adrienne Rich : towards a feminist poetics." reponame:Repositório Institucional da UFSC, 1992. https://repositorio.ufsc.br/xmlui/handle/123456789/157726.

Full text

Abstract:

Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Comunicação e Expressão
Made available in DSpace on 2016-01-08T17:29:22Z (GMT). No. of bitstreams: 1 90152.pdf: 2613512 bytes, checksum: 752aabb78b2900aba15e6f1d0562d359 (MD5) Previous issue date: 1992

APA, Harvard, Vancouver, ISO, and other styles

37

Gengelbach, Aila. "Collectivity in Neutron-Rich Erbium Isotopes." Licentiate thesis, Uppsala universitet, Kärnfysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-442208.

Full text

Abstract:

Neutron-rich rare-earth nuclei around the maximum of collectivity are predicted to exist with an extremely stable intrinsic configuration in their ground-state structure. Due to the high degree of axial symmetry and large deformation, these nuclei are also excellent candidates for having long-lived high-K isomers. The present work concerns a study of the structure of the yrast bands and a search for isomers in the neutron-rich 68Er isotopes. Excited states of 68Er isotopes were populated via multi-nucleon transfer reactions. A 859 MeV 136Xe-beam was used to bombard a 170Er-target. The experimental setup consisted of the high-resolution γ-ray spectrometer AGATA coupled to the heavy-ion magnetic spectrometer PRISMA. The experiment collected 2 TB of useful data corresponding to 3 days of effective beam time. Beam-like fragments were identified by the PRISMA specrometer placed at the grazing angle of 44 degrees. PRISMA allows for Z, A and q identification as well as TOF and velocity vector determination. This is required for the Doppler correction of the emitted γ rays detected in time coincidence with AGATA. A good Z and very clean A separation has been achieved in PRISMA. Making use of two-body kinematics, Doppler corrected γ-ray spectra for target-like fragments were obtained as well. Due to the novel techniques of PSA and γ-ray tracking, AGATA provided high-quality γ-ray spectra for both beam-like xenon and target-like erbium isotopes. Known yrast bands and isomeric states in neutron-rich erbium isotopes were observed. A candidate for the decay of an isomeric state with Eγ=184 keV in 173Er, which has no previously known excited states, was identified.

APA, Harvard, Vancouver, ISO, and other styles

38

Serventi, Luca. "Development of saponin-rich baked goods." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1299264786.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Botha, Jan Abraham. "Probabilistic modelling of morphologically rich languages." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:8df7324f-d3b8-47a1-8b0b-3a6feb5f45c7.

Full text

Abstract:

This thesis investigates how the sub-structure of words can be accounted for in probabilistic models of language. Such models play an important role in natural language processing tasks such as translation or speech recognition, but often rely on the simplistic assumption that words are opaque symbols. This assumption does not fit morphologically complex language well, where words can have rich internal structure and sub-word elements are shared across distinct word forms. Our approach is to encode basic notions of morphology into the assumptions of three different types of language models, with the intention that leveraging shared sub-word structure can improve model performance and help overcome data sparsity that arises from morphological processes. In the context of n-gram language modelling, we formulate a new Bayesian model that relies on the decomposition of compound words to attain better smoothing, and we develop a new distributed language model that learns vector representations of morphemes and leverages them to link together morphologically related words. In both cases, we show that accounting for word sub-structure improves the models' intrinsic performance and provides benefits when applied to other tasks, including machine translation. We then shift the focus beyond the modelling of word sequences and consider models that automatically learn what the sub-word elements of a given language are, given an unannotated list of words. We formulate a novel model that can learn discontiguous morphemes in addition to the more conventional contiguous morphemes that most previous models are limited to. This approach is demonstrated on Semitic languages, and we find that modelling discontiguous sub-word structures leads to improvements in the task of segmenting words into their contiguous morphemes.

APA, Harvard, Vancouver, ISO, and other styles

40

Mir, Taheri Seyed Mohammad. "Distributed Crawling of Rich Internet Applications." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32089.

Full text

Abstract:

Web crawlers visit internet applications, collect data, and learn about new web pages from visited pages. Web crawlers have a long and interesting history. Quick expansion of the web, and the complexity added to web applications have made the process of crawling a very challenging one. Different solutions have been proposed to reduce the time and cost of crawling. New generation of web applications, known as Rich Internet Applications (RIAs), pose major challenges to the web crawlers. RIAs shift a portion of the computation to the client side. Shifting a portion of the application to the client browser influences the web crawler in two ways: First, the one-to-one correlation between the URL and the state of the application, that exists in traditional web applications, is broken. Second, reaching a state of the application is no longer a simple operation of navigating to the target URL, but often means navigating to a seed URL and executing a chain of events from it. Due to these challenges, crawling a RIA can take a prohibitively long time. This thesis studies applying distributed computing and parallel processing principles to the field of RIA crawling to reduce the time. We propose different algorithms to concurrently crawl a RIA over several nodes. The proposed algorithms are used as a building block to construct a distributed crawler of RIAs. The different algorithms proposed represent different trade-offs between communication and computation. This thesis explores the effect of making different trade-offs and their effect on the time it takes to crawl RIAs. We study the cost of running a distributed RIA crawl with client-server architecture and compare it with a peer-to-peer architecture. We further study distribution of different crawling strategies, namely: Breath-First search, Depth-First search, Greedy algorithm, and Probabilistic algorithm. To measure the effect of different design decisions in practice, a prototype of each algorithm is implemented. The implemented prototypes are used to obtain empirical performance measurements and to refine the algorithms. The ultimate refined algorithm is used for experimentation with a wide range of applications under different circumstances. This thesis finally includes two theoretical studies of load balancing algorithms and distributed component-based crawling and sets the stage for future studies.

APA, Harvard, Vancouver, ISO, and other styles

41

Ho, Henry, and Axel Odelberg. "Efficient caching of rich data sets." Thesis, KTH, Data- och elektroteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145765.

Full text

Abstract:

The importance of a smooth user experience in applications is increasing. To achieve more performance when interacting with resource intensive data it is important to implement an efficient caching method. The goal of this thesis is to investigate how to implement an efficient cache in an Android application. The use case is to download metadata and images of movies from a WebAPI provided by June AB. In order to investigate which caching method is the most efficient, a pre-study was done on some of the most common caching methods today. Based on the results of the pre-study, two different caching algorithms were tested and evaluated: First-In First-Out (FIFO) and Least Recently Used (LRU). These two algorithms were then implemented in an Android application. The resulting prototype has a responsive user interface capable of caching large amounts of data without noticeable performance loss compared to a non-cached version. The results from the prototype showed that LRU is the better strategy in our use case, however what we discovered was that the buffer size of the cache has the biggest impact on performance, not the cache eviction strategy.
Vikten av en snabb användarupplevelse ökar i nya applikationer. För att få ut mer prestanda när användare interagerar med resurstung data är det viktigt att implementera en effektiv cachingsmetod. Målet med arbetet är att undersöka hur man implementerar en effektiv cache i en Android-applikation. Användarfallet är att ladda ner metadata och bilder på filmer från ett WebAPI som tillhandahölls av June AB. För att undersöka vilken cachingsmetod som är effektivast gjordes en förstudie på några av de mest vanliga cachingsmetoderna idag. Baserat på förstudiens resultat valdes två cachingsalgoritmer för testning och utvärdering: First-In First-Out (FIFO) och Least Recently Used (LRU). Dessa två algoritmer implementerades i en Android-applikation Prototypen som gjordes har ett responsivt användargränsnitt som kan cacha stora mängder data utan märkbar prestandaförlust jämfört med en icke-cachad version. Prototypen visade att LRU är den bättre strategin för vårt användarfall, men upptäckte att bufferstorleken på cachen har den största påverkan av prestandan, inte cachestrategin.

APA, Harvard, Vancouver, ISO, and other styles

42

Paulick, Mike. "RANGE INSTRUMENTATION AND CONTROL SYSTEM (RICS)." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/607467.

Full text

Abstract:

International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The Range Instrumentation and Control System (RICS) is a PC-based multi-platform data acquisition and display system utilizing CORBA and Multicast UDP in a client/server architecture. Its main purpose is to collect time-space position information (TSPI) from one or more remote radar sites and distribute it in real-time across a wide area network (WAN). This paper describes the collection of MS Windows-based software applications that are designed to control and monitor data acquisition in real-time from a remote console.

APA, Harvard, Vancouver, ISO, and other styles

43

Snider, Christopher W. "A PROGRAMMATIC OVERVIEW OF THE DEVELOPMENT AND IMPLEMENTATION OF THE RICS." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606431.

Full text

Abstract:

International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The Range Instrumentation and Control System (RICS) is a network of personal computers (PCs), routers, and switches designed to transport time-space-position information (TSPI) and/or other data between multiple Test Sites and data reduction facilities. The typical use of RICS will be the transport of TSPI data from a System Under Test (SUT) to a Focus Site for real-time display and post-mission analysis of the data. This capability will be expanded to include the transport of telemetry (TM), video, and communications data via the RICS. This paper will discuss the overall hardware design of the RICS. It will further describe the programmatic issues encountered during the implementation phase of the RICS project. The paper will describe the initial design criteria, the selection of hardware to implement the design, problems encountered with the implementation of the hardware, solutions and workarounds to the problems encountered, and lessons learned during the entire process.

APA, Harvard, Vancouver, ISO, and other styles

44

NAGASAKA, TETSURO, KEIJI SATO, NOBUO NAKASHIMA, HIDESHI SUGIURA, HISASHI IWATA, and SHIGEKI YAMAMURA. "GIANT CELL-RICH OSTEOSARCOMA : A CASE REPORT." Nagoya University School of Medicine, 1996. http://hdl.handle.net/2237/16169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Mockute, Aurelija. "Characterization of Oxygen-rich Ti2AlC Thin Films." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15059.

Full text

Abstract:

In this Thesis Ti-Al-C thin films deposited by cathodic arc at 700, 800 and 900 °C were investigated with respect to composition, structure and mechanical properties. The highest growth temperature resulted in close to single crystalline Ti2AlC MAX phase. A high oxygen incorporation of 7-12 at.% was detected in all the films, likely originating from residual gas and the Al2O3 substrate. It was evident that the characteristic nanolaminated MAX phase structure was retained upon deflection from the ideal MAX phase stoichiometry. Hardness and elastic modulus of the sample grown at 900 °C were 16 and 259 GPa, respectively, as determined by nanoindentation using a Berkovich tip. Nanoindentation measurements with a cube corner tip were also performed on all three samples in order to extract elastic moduli. Analysis of loading-unloading curves and SPM images revealed no relation between pop-in events and pile-ups around the residual imprints, indicating that other mechanisms than formation of kink bands may be responsible for formation of pile-ups. This was also confirmed by cross-sectional TEM investigation of an indent: Ti2AlC MAX phase deformed without kinking and delamination, as opposed to the observations in single crystalline Ti3SiC2 films. Several possible reasons for the different deformation mechanism observed are discussed. These results are of importance for the fundamental understanding of the origin of material characteristics, and serve as an initial study initiating further investigations of the influence of defects on MAX phase properties.

APA, Harvard, Vancouver, ISO, and other styles

46

Ring, Andreas. "Serine/Arginine-rich proteins in Physcomitrella patens." Thesis, Linköpings universitet, Molekylär genetik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-80870.

Full text

Abstract:

Serine/Arginine-rich proteins (SR-proteins) have been well characterized in metazoans and in the flowering plant Arabidopsis thaliana. But so far no attempts on characterizing SR-proteins in the moss Physcomitrella patens have been done. SR-proteins are a conserved family of splicing regulators essential for constitutive- and alternative splicing. SR-proteins are mediators of alternative splicing (AS) and may be alternatively spliced themselves as a form of gene regulation. Three novel SR-proteins of the SR-subfamily were identified in P. patens. The three genes show conserved intron-exon structure and protein domain distribution, not surprising since the gene family has evidently evolved through gene duplications. The SR-proteins PpSR40 and PpSR36 show differential tissue-specific expression, whereas PpSR39 does not. Tissue-specific expression of SR-proteins has also been seen in A. thaliana. SR-proteins determine splice-site usage in a concentration dependent manner. SR-protein overexpression experiments in A. thaliana and Oryza sativa have shown alteration of splicing patterns of endogenous SR-proteins. Overexpression of PpSR40 did not alter the splicing patterns of PpSR40, PpSR36 and PpSR39. This suggests that they might not be a substrate for PpSR40. These first results of SR-protein characterization in P. patens may provide insights on the SR-protein regulation mechanisms of the common land plant ancestor.

APA, Harvard, Vancouver, ISO, and other styles

47

Yu, Liang. "Extrusion processing of protein rich food formulations." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106383.

Full text

Abstract:

Extrusion has been widely used as a high-temperature short-time process to produce commercially shelf stable extruded products. Many physical and chemical changes take place during the process, including the gelatinization of starch, denaturation of protein and even complete cooking. To fully understand changes during the process, evaluation of the effect of extrusion process variables on the extruded product is very important. There are many process and product-dependent variables associated with the extrusion process such as barrel temperature, screw speed, die diameter and raw material composition (moisture, starch, protein and fat contents). In general, commercial extruded products have mainly focused on starch-rich products which are generally are low in protein content. The overall objective of this research was to prepare high-value protein-rich products through the use of extrusion processing.In order to evaluate the influence of added protein [soy protein isolate, (SPI)] to a corn-based system, a two step procedure was employed. Firstly, the effect of feed moisture, screw speed and barrel temperature on physical properties of extruded corn flour and SPI blends was evaluated to generate a basic understanding of the influence of operational parameters. This was expanded to include higher protein levels in the subsequent study. The physical properties of the extruded material considered were expansion ratio, bulk density, breaking strength, water solubility index, rehydration ratio and color. All these properties were significantly (P ≤ 0.05) affected by the process variables. An optimization study was performed to determine optimum variable levels to achieve desirable properties of extruded product within selected constraints.As residence time distribution (RTD) is an important aspect of the extrusion process. The RTD of SPI and corn flour mixtures was studied under different screw speeds (75, 100 and 125 rpm), raw material moisture (25, 30 and 35%) and die diameter (3 and 5 mm) configurations. Two conventional flow models served to represent the RTD patterns in the extruder: the frequency model (F distribution) and the cumulative RTD model (E-distribution). The parameters of these models – the half concentration internal age and particle accumulation rate – were determined by a nonlinear regression. These models' parameters were found to be responsive to process variables, and both F and E distributions were well predicted.As extruded products produced under the above conditions remained high in moisture content and water activity, in order to achieve shelf stability it was necessary to lower their moisture and water activity levels. The effect of extrusion process variables on the drying behavior of the product was studied next. Since there were many test samples, a simple drying set-up operating under moderate temperature (55°C), humidity and airflow conditions was used. The extrusion process variables were found to significantly (P ≤ 0.05) affect the drying behaviour of the product. Models were developed to predict drying times to reduce the product moisture to stable levels (water activity below 0.75). Selected extrusion products with 50% protein content were subjected to frying at different temperatures (145ºC, 165ºC, 185ºC) and for different durations (0 to 660 s). The resultant products' physical characteristics, including breaking strength, oil uptake, color and moisture content were evaluated, and a sensory test was performed to describe the acceptability of the products. Frying conditions which yielded products of acceptable quality were identified.Overall, the research contributes to a better understanding of the extrusion process of high SPI content corn flour blends. Together with post extrusion treatments including drying and frying, the process can produce good quality protein-rich extrusion products for use in further preparations or as a fried snack.
Processus à haute température et de courte durée, l'extrusion permet la production de produits d'extrusion comestibles à longue vie commercial. Durant ce processus il survient des changements incluant la gélatinisation de l'amidon, la dénaturation des protéines, ainsi qu'une cuisson uniforme et complète. Pour bien maîtriser ces changements, une évaluation de l'effet des variables du processus d'extrusion sur l'extrudat est de rigueur. Plusieurs variables, soit la température du fourreau, la vitesse de la vis, le diamètre de la filière et la composition de la matière première (teneur en eau, en amidon, en protéines et en gras), sont liées au processus ainsi qu'au produit. Les produits commerciaux extrudés demeurent riche en amidon, mais pauvre en protéines. La présente recherche visa à préparer, par l'entremise d'une transformation par extrusion, des produits de haute valeur, riches en protéines.Afin d'évaluer l'influence d'un ajout de protéine [isolats de protéine de soya, (IPS)] à un système à base de maïs, un processus à deux étapes fut étudiés. L'effet de la teneur en eau du matériel, de la vitesse de la vis et de la température du fourreau sur les propriétés physiques d'extrudats d'un mélange d'ISP et de farine de maïs furent évalués, pour évaluer l'influence des paramètres opérationnels. L'inclusion de teneurs en protéine plus élevés suivi. Les propriétés physiques de l'extrudat considérés furent le taux de foisonnement, la densité apparente, la résistance à la rupture, l'indice de solubilité dans l'eau, le taux de réhydratation, et la couleur. Toutes celles-ci furent influencées (P ≤ 0.05) par les variables de transformation. Une optimisation des variables de transformation pour obtenir un extrudat aux propriétés voulues sous certaines contraintes d'opération suivit.La distribution temps séjour (DTS) est un important aspect du processus d'extrusion. La DTS de mélanges d'IPS et de farine de maïs fut déterminée sous différentes vitesses de vis (75, 100 ou 125 rpm), teneurs en eau du matériel brut (25, 30 ou 35%) et diamètre de la filière (3 ou 5 mm). Deux modélisations conventionnelles du débit, l'une liée à la fréquence (distribution F) et l'autre cumulative (distribution E), servirent à représenter le cours du DTS dans l'extrudeur. L'âge interne à mi-concentration et le taux d'accumulation de particules, déterminés par régression non-linéaire, répondirent bien aux variables de transformation, les distributions E et F étant prédites avec exactitude.Comme ces extrudats maintinrent une teneur et une activité en eau élevée, il fut nécessaire, afin d'obtenir une bonne stabilité sur les tablettes, de diminuer ces derniers. Un étude sur l'effet des variable du processus d'extrusion sur le séchage subséquent de l'extrudat fit suite. Étant donné le grand nombre d'échantillons, un simple appareillage de séchage, fonctionnant à de températures, taux d'humidités et flux d'air moyens, fut utilisé. Les variables du processus d'extrusion influencèrent (P ≤ 0.05) le séchage du produit. Des modélisations furent développées afin de prédire le temps nécessaire pour réduire la teneur en eau du produit à un niveau stable (activité de l'eau en deçà de 0.75). Des extrudats d'une teneur en protéine de 50% furent frits à des températures de 145ºC, 165ºC, et 185ºC pour 0 à 660 s. La résistance à la rupture, l'absorption d'huile, la couleur et la teneur en eau des produits frits furent évalués. Un test organoleptique évalua l'acceptabilité des produits. Les conditions de friture donnant une qualité acceptable furent identifiées.Ces études contribuèrent à une meilleure compréhension du processus d'extrusion de mélanges de farine de maïs à haute teneur en ISP. Apparié aux traitements post-extrusion de séchage ou de friture, le processus permet de produire des extrudats de qualité à haute teneur en protéines pouvant passer par une étape de préparation additionnelle ou être consommées directement comme croustille frite.

APA, Harvard, Vancouver, ISO, and other styles

48

El, Husseini Bassam. "Streaming potential measurements in sulfide rich tailings." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115872.

Full text

Abstract:

In general, tailings dams are expected to seep. Anomalous seepage, especially when induced by internal erosion, is a major concern for owners and operators. The long established techniques for monitoring water seepage provide sparse information which may not be sufficient to detect and map the seepage path. Hence, there exists a great need for non-invasive techniques that would be sensitive to changing seepage conditions. The non-invasive nature of the techniques is particularly important because drilling and other penetrating (invasive) investigation methods are normally avoided.
Non-invasive techniques such as self-potential and high-resolution resistivity have been significantly improved in the past decade and have been successfully used for water retention dam investigation and monitoring. The main difficulty in the use of these techniques in monitoring sulfide rich tailings dams is the presence of electrochemical potentials that renders the interpretation of the acquired self-potential data difficult.
Numerical modelling is one of the latest methods in interpreting self-potential anomalies induced by liquid flow. But, in order to model streaming potentials several parameters need to be measured or estimated; (1) the hydraulic driving force and the hydraulic conductivity are required to solve for the hydraulic pressure distribution; (2) the cross-coupling conductivity distribution is needed to calculate the conduction current source parameter; and (3) the resistivity distribution is needed to determine the resulting potential distribution.
The zeta-potential and the resistivity of three pyrite rich tailings from the Abitibi region in Quebec were measured over the pH range 2 to 5 in different KCl aqueous solutions for the purpose of estimating the magnitude of electrokinetic effect induced by mine water seepage and the electrical resistivity variation induced by particle migration. The experimental and theoretical results obtained in the present study are pertinent to the interpretation of self-potential data. The zeta-potential was found to vary from -27 to -2 mV and the resistivity of the tailings was found to increase when fine particles are eroded.

APA, Harvard, Vancouver, ISO, and other styles

49

Nakarmi, Mim Lal. "A1-rich A1GaN alloys and A1N epilayers /." Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Gorchs, i. Altarriba Roser. "Geoquímica orgànica de carbons rics en sofre." Doctoral thesis, Universitat Politècnica de Catalunya, 2006. http://hdl.handle.net/10803/6988.

Full text

Abstract:

L'objectiu de la tesi és l'estudi geoquímic orgànic en carbons rics en sofre i de rang variat. Aquest fet permet reconèixer diversos compostos orgànics nous i també millorar la comprensió significativa d'alguns biomarcadors. Es pretén establir l'ambient deposicional i el grau de maduració a partir de l'ús d'índexs estàndards i s'han proposat alguns de nous atenent que gairebé tots els carbons estudiats són de baix rang, ja que fins ara només s'havia aplicat a mostres madures.
El treball ha millorat el coneixement de l'origen, les estructures i els comportaments dels compostos organo-sofrats (COS) en carbons de diferent rang tant com es pretenia en un principi, tot i que s'ha completat amb altres vessants ja citades. Per tant es considera de gran interès científic, que pot contribuir a un millor coneixement geològic, i al mateix temps significativament important en el camp de la geoquímica orgànica.
El objetivo de la tesis es el estudio geoquímico orgánico en carbones ricos en azufre y de rango variado. Ello ha permitido reconocer diversos compuestos orgánicos nuevos y también mejorar la comprensión significativa de algunos biomarcadores. Se ha pretendido establecer el ambiente deposicional y el grado de maduración a partir del uso de índices estándares y se han propuesto algunos nuevos atendiendo que casi todos los carbones estudiados son de bajo rango, ya que hasta ahora tan solo se había aplicado a muestras maduras.
El trabajo ha mejorado el conocimiento del origen, las estructuras y los comportamientos de los compuestos organo-azufrados (COS) en carbones de diferente rango tan como se pretendía en un principio, aunque se ha completado con otras vertientes ya citadas. Por tanto se considera de gran interés científico, que puede contribuir a un mejor conocimiento geológico a la vez que significativamente importante en el campo de la geoquímica orgánica.

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'RICSH'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles