Dissertations / Theses on the topic 'Recovery study'
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Rojas, Sigala Mauro. "Study of Launcher Recovery Systems." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80722.
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The space sector has been evolving due to the fast-technological advancements generating a reduction of manufacturing, cost and size in space missions, where highly capable performing small satellites are becoming the standard in this industry. Furthermore, the high launching cost limits the trend of cost reduction for the space missions, since the small satellites are sent as a second payload. An alternative to reduce this limitation is using reusable launchers which are key in the future of space industry, once they are optimized in efficiency and reliability. Therefore, an opportunity of design is presented, since the increase of small satellites missions requires a reduction of the cost in launch services a suitable option for the future market are the reusable launchers. The problematic of using recovery systems and reuse parts of the vehicle is the increase of weight due to the added systems that the vehicle needs to be recovered. This paper presents different engines and calculate the performance of each engine based on the needs of missions for small satellites. The starting conditions will be that the payload needs to be launched in low circular or elliptical orbits (altitudes of between 300 and 650 km) and the engine has the ability of vertical take-off, vertical landing. The design will also take into account the possibility of reusing parts of the vehicle and the reentry capability. Different combination of engines and fuels are setup in various configurations. For each case the mass analysis will be developed which will allow to calculate the performance for each engine. The important parameters are the number and type of engines, the ratios of the masses, the thrust-to-weight ratio and specific impulse. Once the mass analysis is obtained the following procedure is the selection of the design considering the empty mass. The best combination of characteristics of the engines will be the suitable candidate. Different assistance systems and techniques for the recovery are assessed to obtain a suitable option to improve the efficiency. The expected results are the calculation of the engine performance and how the selected design can be suitable for the space launcher sector for the small satellites. The expected results are a feasible vehicle for small satellites design based in the calculation of the engine parameters together with an efficient launch recovery system. The conclusion is that the space sector can benefit from the design, demonstrating that a launch vehicle with the reusable characteristics
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Yockel, Sharon Lynn. "Service recovery : a case study /." Online version of thesis, 1997. http://hdl.handle.net/1850/12325.
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Goerg, Kristin A. "A Study of fume particle deposition." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/5570.
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Clark, Jonathan. "Heroin Addiction Recovery : A qualitative study on how individuals recovered from habitual heroin addiction." Thesis, Umeå universitet, Institutionen för socialt arbete, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-103754.
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McArthur, L. "Journeys to recovery : clinicians' conceptualisations of recovery in child sexual abuse : a grounded theory study." Thesis, University of Edinburgh, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.657511.
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The experience of child sexual abuse has been associated with emotional and behavioural problems in childhood and mental health problems in later life (Kendall-Tackett et al, 1993). Clinicians may be required to have awareness of multiple theoretical models and approaches to provide the highly individualised interventions required. However, the impact of this upon clinicians has rarely been considered. This study explored clinicians’ conceptualisations of recovery in child sexual abuse and the effect of these upon clinical practice. In-depth interviews were carried out with twelve clinicians working within three child sexual abuse teams and were analysed using a Grounded Theory methodology (Strauss & Corbin, 1998). Through analysis of the interview material two core categories emerged. The first related to the conceptualisation of recovery as an ongoing, individualised, developmental journey. Four distinct phases of this process emerged within this category, including building safety and trust, integration and meaning making, finding worth in the self and others and re-engaging with the world. The second core category related to the factors which influenced clinicians’ conceptualisations. These were concerns about stigma and power, developmental orientation, personal experiences or ethos, therapeutic orientation and systemic influences. Results highlighted considerable concerns about stigma amongst clinicians. These appeared to relate to the unique developmental sensitivity experienced by child and adolescent workers. The complexity of conceptualising recovery processes within childhood was explored and the need for unifying, developmentally sensitive theoretical models and guidelines highlighted.
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Palmer, Francesca T. "Lay constructions of recovery : a Q methodological study." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/808622/.
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Recovery from mental health problems is a key target for the NHS today. The philosophy of personal recovery is included within government policies and the design of some mental health services in the UK. Research into recovery has focused largely on service-users and there is a lack of information about lay perceptions of recovery. This study sought to examine lay constructions of recovery from two mental health problems - depression and psychosis - using Q methodology. Seventy-two participants sorted 47 statements about recovery based upon their level of relative agreement or disagreement with each one after reading a vignette describing either symptoms of depression or of psychosis. Three subtly different constructions emerged from participants in the depression condition and two from those in the psychosis condition. Lay constructions of recovery from each of these conditions overlapped to some extent, with differences emerging around the centrality of professional input and the eradication of symptoms. The study demonstrated that the constructions of lay people in this sample comprised elements of both personal and clinical recovery. Generally, participants seemed to have an optimistic view on the possibility of recovery from both conditions.
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Vestberg, Ola. "Heat recovery from untreated wastewater : A case study of heat recovery from sewerline to district heating network." Thesis, KTH, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210224.
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High amounts of heat energy are today deposited into the urban wastewater system. The current society-wide development for energy efficiency has so far barely touched upon the area of wastewater heat conservation, which is why the share of total energy consumption from water use is increasing. Through this master thesis a case study was performed, assessing in particular the heat recovery potential from untreated wastewater in the common sewer line upstream from a wastewater treatment plant (Käppalaverket) for supply onto the local district heating network (Norrenergi) by the use of a heat pump solution. The current wastewater treatment process is using temperature dependant biological treatment for denitrifying the wastewater before it is disposed to the Baltic Sea, which poses limitations on upstream heat extraction. The purpose of the study was to assess the heat recovery potential and possibilities when using untreated wastewater compared to what is done traditionally using treated wastewater after the treatment plant. Furthermore a technological review was done over the area of heat recovery from untreated wastewater and also an evaluation of potential equipment and technology suppliers. Hydraulic modelling and thermodynamic simulations of the wastewater system were performed. Results showed that during a majority of the year approximately 4 MW of heat could be extracted while staying within conservative limits in regards to a minimum influent temperature as well as a maximum upstream temperature decrease. During wet season however, no or very limited heat could be recovered as the influent temperatures are already in a rather sensitive range in regards to the biological treatment process. At this level, through analysis of available equipment for heat recovery from untreated wastewater, a maximum heat amount of approximately 18 GWh per year could be supplied to the district heating network. Furthermore, it was found that reducing the amount of supplementary water in the system would be highly beneficial, both regarding HR potential but also for the treatment process in the plant. Also, if extensive HR performed by water consumers would occur, the model shows that this would probably have a negative effect on downstream temperature and the treatment process. Through this study it was concluded that even though the theoretically available heat in the system is very large, the practical heat recovery potential is very limited under current conditions. The strongest reason is the limitation posed by the temperature requirements of the influent wastewater. If also cooling is considered, the heat recovery prospects might be better due to the lower net energy extraction from the wastewater. Regarding the economic feasibility of an installation for heat recovery from untreated wastewater, the assessment made in this project showed that it may actually be comparable to projects using other types of waste heat. The results and conclusions from this study should not be considered as a green light, or as motivation, for performing any upstream heat recovery installations. Such projects must be done in consensus with local authorities and especially the wastewater treatment plant in question. Further analyses in this area is considered essential before exploring it further, such as assessing the transient behaviour of the surrounding rock walls when heat is recovered upstream. The model used in this study also needs confirmation through actual temperature measurements within the system, which do not exist at the moment. Furthermore, a complete life cycle analysis should be carried out for the entire urban water system, which should find an optimal way of where to use and to recover the energy.Stora mängder värme sköljs idag ner i avloppsnätet. Den pågående samhällsbreda utvecklingen för energieffektivisering har så här långt knappt rört vid området för spillvatten, varför andelen av den totala energikonsumtionen från vattenanvändning ökar. Inom detta examensarbete har en fallstudie genomförts där värmeåtervinning från orenat avloppsvatten längs avloppsnätets samlingsledning uppströms från Käppalaverkets reningsverk har utretts. Detta med hjälp av en värmepump för att förse Norrenergis fjärrvärmenät. Den nuvarande vattenreningsprocessen baseras på temperaturberoende biologisk rening för att denitrifiera spillvattnet innan det släpps ut i Östersjön, vilket sätter begränsningar på uppströms värmeuttag. Studien syftade till att utreda potentialen och möjligheterna för att använda orenat avloppsvatten jämfört med att som traditionellt använda redan renat avloppsvatten efter reningsverket.Därtill utfördes en teknikinventering över området samt en utvärdering av potentiella teknik- och utrustningsleverantörer. Hydraulisk modellering och termodynamiska simuleringar av avloppssystemet utfördes. Resultaten visade att under en majoritet av året så kan ungefär 4 MW värme extraheras från det orenade vattnet inom konservativa gränser i förhållande till tillåten minsta inloppstemperatur till reningsverket samt en maximal uppströms temperatursänkning. Under vintern dock så kan väldigt lite, eller till och med ingen, värme återvinnas på grund av att inloppstemperaturen till reningsverket redanbefinner sig inom ett relativt kritiskt område i förhållande till den biologiska reningsprocessen. På denna nivå så kan uppskattningsvis maximalt 18 GWh per år förses till fjärrvärmenätet. Det fanns också att en reduktion av mängden tillskottsvatten skulle vara väldigt gynnsamt, både för värmeåtervinnings skull men även för själva reningsprocessen. Därtill, om utbredd uppströms värmeåtervinning hos konsumenterna skulle tillåtas, så visar modellen att detta skulle ha en negativ påverkan på nedströms reningsprocess. Genom denna studie dras slutsatsen att trots att den teoretiskt tillgängliga värmen är stor i systemet så är de praktiska möjligheterna väldigt begränsade under nuvarande förhållanden. Den starkaste orsaken till detta är begränsningen som utgörs av temperaturkravet som reningsprocessen har. Om även kyla anses möjligt så ökar även möjligheterna för värmeåtervinning på grund av den lägre netto effekten från värmeåtervinning som sker. Då den ekonomiska genomförbarheten analyserades fanns att en installation med värmeåtervinning från orenat avloppsvatten faktiskt är jämförbar med andra spillvärmeprojekt. Det är viktigt att poängtera att resultat och slutsatser i denna studie inte bör anses som någon form av grönt ljus, eller som motivering, för att genomföra någon sorts uppströms installationer för värmeåtervinning. Projekt av sådan natur bör genomföras i samförstånd med lokala myndigheter, och i förlängningen även med avloppsreningsverket i fråga. Fortsatta analyser inom detta område betraktas som absolut nödvändiga före man exploaterar detta område vidare. Sådana studier är till exempel att analysera det transienta beteendet hos den omgivande bergväggen i avloppsnätet då värme börjar återvinnas uppströms. Modellen i denna studie behöver också vidare bekräftelse genom faktiska temperaturmätningar i avloppssystemet, vilka idag ej existerar. Vidare bör en fullständig livscykelanalys över hela det urbana vattensystemet göras, var man bör finna ett optimerat sätt att använda samt återta energin.
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Hong, Tao. "Fundamental study on tin recovery in acidic aqueous systems." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54952.
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Tin is widely used in solder, tin plating and tin alloys. The current recovery rate of tin metal is low and insufficient with just over 300,000 tonnes annually. The grade of tin concentrates in traditional smelting methods needs to be at least 60%. Otherwise, iron, the chief impurity in tin concentrates can form tin-iron alloys and result in inefficient recovery of tin. Therefore, a hydrometallurgical technology to treat lower grade tin concentrates is proposed to solve the problem and close the demand gap for tin. The electrochemical reduction of chromium(III) solutions was conducted with a graphite felt cathode in acidic aqueous systems (chloride, sulfate and MSA). The parameters of acid concentration, current density, graphite felt thickness, graphite felt surface condition and graphite felt usage frequency were investigated. It was found that acid concentration has a significant influence on chromium(III) reduction in the sulfate and MSA system, while slight effect in the chloride system. In addition, the lifetime of the graphite felt in the sulfate and MSA system was shorter than that in the chloride system. These electrochemical differences may result from the pathway difference in electron transfer between the electrode and the chromium(III) ions. In general, chromium(III) ions in the chloride system showed the best electrochemical reduction activity. The chromium(II) ions synthesized from electrochemical reduction of chromium(III) ions were then used to effect the reduction of SnO₂ powder. The effect of temperature on the recovery test in the chloride, sulfate and MSA system was investigated. It was found that under the conditions of this thesis, the predominant recovery product of SnO₂ is Sn metal, rather than Sn(II). Generally, the recovery kinetics and total conversion were low in the sulfate and MSA system; however, the chloride system showed significantly better recovery results. This may be attributed to the catalysis effect of the chloride ions on the recovery process.Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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McLaughlin, John Joseph. "Finding the commas, a phenomenological study of reading recovery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30003.pdf.
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Nilsson, Karin. "Recovery from adolescent onset anorexia nervosa : a longitudinal study." Doctoral thesis, Umeå : Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1119.
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Lu, Xiaoxia. "Feasibility Study: Phosphorus Recovery from Household Solid Organic Waste." Thesis, KTH, Industriell ekologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155705.
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Phosphorus is an essential source with significance use in agriculture. Phosphorus is lost in the human intensified global cycle and it is important to remove phosphorus from water body. However, important and potential sources for phosphorus product which is suitable and effective for fertilizer use may be ignored due to over emphasize on the pollution prevention. This work aims to identify the potential of phosphorus recovery from solid organic waste in Sweden. Based on the result of Material Flow Analysis of phosphorus, solid food waste is identified the main solid waste fractions containing phosphorus substances of phosphorus in Sweden. From the case study and comparison of three alternatives, the possibility of recovery of phosphorus from household solid food waste is analyzed. A SWOT analyst is applied to provide a best solution for phosphorus recovery from food waste. The key drivers, the system boundaries for the phosphorus recovery and collection, storage, transport and use of the phosphorus are also discussed.
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FILHO, JORGE AMON. "TRANSIENT RECOVERY VOLTAGE REQUIREMENTS FOR CIRCUIT BREAKERS: STUDY METHOD." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1986. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9433@1.
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O trabalho desenvolvido estabelece uma metodologia de
estudo para a determinação dos requisitos de tensão de
restabelecimento transitória de disjuntores através de
simulações em computador digital com a utilização do
programa de cálculo de transitórios elétricos
Electromagnetic Transients Program (EMTP) de Bonneville
Power Administration (BPA).It is established in this paper a study method to determine the transient recovery voltage requirements for circuit breakers, by means of simulations in digital computer, using the Electromagnetic Transients Program (EMTP) de Bonneville Power Administration (BPA).
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Velona, Vasiliki. "A study on structure recovery and the broadcasting problem." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672697.
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The thesis contains a study of two problems of combinatorial statistics. The first one is structure learning for partial correlation graphs and the second one is the broadcasting problem on certain families of random recursive trees. In a precise language, the structure recovery problem that we study is the following: given access to individual entries of a covariance matrix S, learn the support of the inverse of S (let us denote this matrix by K) using only a small fraction of S. We call this problem ‘structure recovery’ since the zero-entries of K define the adjacency matrix of a graph (called partial correlation graph). As an example of why this is an important graph to learn, consider that S corresponds to a Gaussian random vector (X1, ..., Xn). Then an entry sij is zero if and only if Xi and Xj are independent given the rest of the random variables. A series of algorithms is proposed to address the aforementioned question, assuming that our graphs satisfy certain sparsity conditions. The sparsity that is assumed is related to how much our graph resembles a tree; in particular we deal with trees, graphs of small 2 connected components, and graphs of small treewidth. The proposed algorithms can also be used to estimate K and not only learn the partial correlation graph. Moreover, they can be used to invert any symmetric positive definite matrix since the analysis can be detached from its statistical connection and impact.The motivation for the use of covariance entries is that S might be too large to even store, as it often happens in statistical settings. In fact, our goal is to learn the partial correlation graph using sub-quadratic number of queries, since quadratic time is needed just to write down and store the covariance matrix – this is the starting point for a big part of the literature. The desired complexity bounds are achieved through our analysis.
Moving to the second problem under study, we consider a broadcasting process on a graph to be the propagation of a message (let us say a bit value in {0, 1}) from one node to all the rest, possibly corrupted. Our goal is to guess the initial message. We consider that our graph is a tree and is created dynamically in times 0, 1..., n, in a way that at time i the i-th vertex enters the system and attaches with an edge to an existing vertex j (we then write i ~ j). We are interested in the case where i attaches uniformly at random to an existing vertex (uniform attachment) or where i attaches to a vertex with probability proportional to the outdegree of an existing vertex, plus some parameter ß > 0. The broadcasting process we consider is one where vertex 0 (the root) has a bit value that is propagated correctly to its neighbours with probability 1 - q and incorrectly with probability q. The broadcasting problem under study can be formulated in this way: given access to a random tree produced by either uniform attachment or preferential attachment and the bit values of the vertices, but without observing the time labels of the vertices, recover the bit of vertex zero. In a more difficult variant, we answer the same question given only the bits of vertices with outdegree zero (the leaves). In both variants of the problem in both models, we characterize the values of q for which the optimal reconstruction method has a probability of error bounded away from 1/2. We also show that the probability of error is bounded by a constant times q. Two simple reconstruction rules are analyzed in detail. One of them is the simple majority vote, the other is the bit value of the centroid of the tree (or the closest leaf to the centroid). We also analyze a third reconstruction rule which is more complex but works for all q where reconstruction is theoretically possible.Aquesta tesi estudia dos problemes d'estadística combinatòria: l'aprenentatge d'estructura per a grafs de correlació parcial, i el problema de difusió en famílies d'arbres recursius aleatoris. En el primer cas, el problema de recuperació de l'estructura que estudiem és el següent: donat l'accés a les entrades individuals d'una matriu de covariància A, aprenem el suport de la inversa de S. (denotem aquesta matriu per K) utilitzant només una petita fracció de la matriu S. Anomenem aquest problema «de recuperació d'estructures», ja que les entrades nul·les de K defineixen la matriu d'adjacència d'un graf (anomenat graf de correlació parcial). Com a exemple del perquè aquest és un graf rellevant, considereu que S s'associa a un vector aleatori gaussià (X1, ..., Xn). Llavors una entrada sij és zero si i només si Xi i Xj són independents. Proposem una sèrie d'algorismes per estudiar la pregunta esmentada, assumint que els nostres grafs satisfan certes condicions de densitat. La densitat que s'assumeix està relacionada amb quant s'assembla el nostre graf a un arbre; en particular, tractem amb arbres, grafs amb components connexes suficientment petites, i grafs de petita amplada d'arbre. Els algorismes proposats també es poden utilitzar per estimar S i no només per aprendre el graf de correlació parcial. Finalment, les tècniques també es poden utilitzar per invertir qualsevol matriu simètrica definida positiva, ja que l'estudi es pot separar de la seva connexió estadística. La motivació per a l'ús d'entrades de covariància és que S pot ser massa gran per emmagatzemar-la, com passa sovint en configuracions estadístiques. De fet, el nostre objectiu és aprendre el graf de correlació parcial utilitzant el nombre subquadràtic de consultes, ja que el temps quadràtic és necessari només per a escriure i emmagatzemar la matriu de covariància: aquest és el punt de partida per a una gran part de la literatura. Els límits de complexitat desitjats s'aconsegueixen a través de la nostra anàlisi. En quant al segon problema, considerem que un procés de radiodifusió sobre un graf és la propagació d'un missatge (diguem un valor de bit a {0,1}) d'un node a tota la resta, possiblement corromput. El nostre objectiu és esbrinar el missatge inicial. Considerem que el nostre graf és un arbre i es crea dinàmicament en temps 0, 1, ..., n, de tal forma que en el temps i el vèrtex i-èssim entra al sistema i s'uneix amb una aresta a un vèrtex j existent (escrivim i~j). Estem interessats en el cas en què i s'adhereixi uniformement a l'atzar a un vèrtex existent (adjunt uniforme) o on s'hi connecti a un vèrtex amb probabilitat proporcional al grau de sortida d'un vèrtex existent, més algun paràmetre ß > 0. El procés de radiodifusió que considerem és un en què el vèrtex 0 (l'arrel) té un valor de bits que es propaga correctament als seus veïns amb probabilitat 1-q i incorrectament amb probabilitat q. El problema de la radiodifusió es pot formular d'aquesta manera: donat l'accés a un arbre aleatori produït per un adjunció uniforme, o per adjunció preferencial i els valors de bits dels vèrtexs, però sense observar les etiquetes de temps dels vèrtexs, recupereu el bit del vèrtex zero. En una variant més difícil, també es pretén estudiar-lo donat només els bits dels vèrtexs amb grau de sobre zero (les fulles). En les dues variants del problema, caracteritzem els valors de q per als quals el mètode de reconstrucció òptim té una probabilitat d'error limitat a 1/2. També demostrem que la probabilitat d'error està limitada per un múltiple constant de q. S'analitzen detalladament dues regles de reconstrucció senzilles: una d'elles és el vot per majoria simple, l'altre és el valor de bit del centroide de l'arbre (o la fulla més propera al centroide). També analitzem una tercera regla de reconstrucció que és més complexa, però funciona en casos més generals de la tria de q.
Matemàtica aplicada
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Santos, Cátia Sofia Andrade dos. "Biomonitorization of birds under recovery: a long term study." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/9224.
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Mestrado em Biologia Aplicada - Ecologia, Biodiversidade e Gestão dos EcossistemasO uso de aves, em particular aves aquáticas, como bioindicadores de qualidade ambiental tem vindo a ser aplicado em estudos de diversos tipos de ecossistemas. São vários os atributos que tornam as aves espécies de interesse na biomonitorização ambiental, como a sua abundância, facilidade de encontrar no campo e particularmente sensibilidade a contaminantes ambientais, nomeadamente toxinas e contaminantes bioacumuláveis. Nos últimos anos, uma parte significativa dos estudos de biomonitorização realizados em Portugal tem-se focado essencialmente em organismos de níveis tróficos inferiores (ex. larvas, crustáceos e bivalves), mas pouca atenção tem sido dada a organismos de níveis tróficos superiores, tais como mamíferos ou aves. O presente trabalho teve como principais objetivos: (i) avaliar a exposição ambiental das aves portuguesas a contaminantes ambientais, em particular de aves aceites para reabilitação em centros de recuperação de animais selvagens, (ii) esclarecer se esses fatores podem ou não conduzir à doença das aves e influenciar a sua recuperação, e (iii) entender se o uso de ferramentas ecotoxicológicas pode ou não ser uma mais-valia na monitorização e recuperação dessas mesmas aves. No sentido de esclarecer estas questões foram avaliados marcadores de neurotoxicidade e genotoxicidade em aves aquáticas das ordens Ciconiiformes, Charadriiformes e Pelecaniformes. Na primeira parte deste trabalho (análise de biomarcadores de neurotoxicidade), e em dois estudos independentes, foi feita a caracterização das colinesterases presentes no plasma da cegonha branca (Ciconia ciconia), garça-real (Ardea cinerea) e do ganso-patola (Morus bassanus) e avaliada a reativação da colinesterase (ChE) presente no cérebro da gaivota-argêntea (Larus michahellis). A impossibilidade da interligação entre estes estudos e uma exploração mais detalhada deve-se à (in)disponibilidade de amostras/aves. Na segunda parte deste trabalho, para a avaliação de efeitos genotóxicos, foi analisada a frequência de micronúcleos e outras anomalias nucleares em eritrócitos de cegonha branca (Ciconia ciconia), garça-real (Ardea cinerea), garça-vermelha (Ardea purpurea) e garça-branca-pequena (Egretta garzetta). A pseudocolinesterase (PChE) foi o principal tipo de colinesterase identificada no plasma de C. ciconia, A. cinerea e M. bassanus. Por sua vez, nos ensaios de reativação observou-se um aumento significativo (superior a 50%) na atividade da colinesterase presente no cérebro de L. michahellis, sugerindo exposição prévia destes indivíduos a anticholinesterásicos. Estes resultados sugerem que as aves portuguesas poderão estar expostas a diferentes graus de contaminação ambiental, podendo esta contaminação deteriorar a saúde das aves. O uso de ferramentas ecotoxicológicas na monitorização de aves em reabilitação afigura-se-nos, por isso, como sendo uma mais-valia pois permitirá identificar de forma mais precoce sinais fisiológicos de toxicidade e assim executar uma avaliação mais criteriosa do estado físico das aves. Para além disso, a monitorização através da utilização deste tipo de biomarcadores poderá permitir seguir a potencial recuperação dessas aves.
Birds, including waterbirds, have been used as bioindicators of environmental quality in a broad range of ecosystems. Amongst other attributes, their abundance, conspicuousness and sensibility to environmental contaminants, including bioaccumulative chemicals and toxins, are some of the characteristics that make them key species in environmental biomonitorization. Over the past years a significant part of the Portuguese biomonitoring studies has focused on organisms at lower trophic levels (e.g. larvae, crustacean and mollusks), but failed to address contaminants’ effects upon organisms at higher trophic levels such as mammals or birds. The present study aims were to: (i) assess the exposure of Portuguese birds to environmental contaminants, in particular birds accepted for rehabilitation in wildlife recovery centres, (ii) clarify if these factors could lead to birds illness and influence their recovery, and (iii) understand if ecotoxicological tools can help and be useful tools in the future to monitor and aid bird’s recovery. In order to address these issues, it was assessed markers of neurotoxic and genotoxic exposure in aquatic birds from the orders Ciconiiformes, Charadriiformes and Pelecaniformes. In the first part of this study (the analysis of neurotoxic markers), it was characterized the cholinesterase form present in plasma of the white stork (Ciconia ciconia), grey heron (Ardea cinerea) and northern gannet (Morus bassanus) and the cholinesterase (ChE) reactivation in brain of the yellow-legged gull (Larus michahellis) was assessed. The impossibility of interconnection between these studies and a more detailed exploration was due to the (un)availability of samples/birds. In the second part of this work, for the assessment of genotoxic effects, the frequency of micronucleus and other nuclear abnormalities was analysed in erythrocytes of the white stork (Ciconia ciconia), grey heron (Ardea cinerea), purple heron (Ardea purpurea) and the little egret (Egretta garzetta). Pseudocholinesterase (PChE) was the main cholinesterase present in plasma of C. ciconia, A. cinerea and M. bassanus. Moreover, cholinesterase activity in brain of L. michahellis was found to get reactivated at a significant extent (activity increase in 50%), suggesting a previous exposure of these individuals to anticholinesterase agents. High levels of genotoxic damage were also observed in the species of Ciconiiformes studied, with these values varying significantly between different years and geographical origins (P < 0.05). These results suggest that Portuguese birds might be exposed to different levels of environmental contamination and that this contamination may impair birds’ health. The use of ecotoxicological tools seems to be a very promising way to help monitor and aid bird’s recovery as it will probably allow screening for early physiological signs of toxicity, therefore enabling a more insightful evaluation of birds’ health condition. Moreover, the use of these types of biomarkers may allow to monitor the potential rehabilitation of these birds.
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Abogado, Roces Susan. "The study on in-situ recovery of hydrocarbon resources /." Electronic version of summary, 1994. http://www.wul.waseda.ac.jp/gakui/gaiyo/2033.pdf.
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McArthur, Lorna Shaw. "The unique, evolving journey of recovery : clinicians' perceptions of recovery in child sexual abuse : a grounded theory study." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/29258.
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Aim: Research suggests that impact of childhood sexual abuse can be influenced by individual coping styles, attachment and environmental factors (Runtz & Schallow, 1997; Banyard, 2003). Consequently the nature of recovery amongst children and young people may vary considerably. Recent years have seen research focus on resilience and recovery. However, there remains debate as to definitions of recovery, efficacy of treatment interventions and validity of current theoretical models. As a result, research literature has yet to provide a unified developmental model of recovery following sexual abuse. This study therefore aimed to explore the meaning of recovery to clinicians currently working within child sexual abuse services. Method: In-depth interviews were carried out with twelve clinicians working within three child sexual abuse teams and were analysed using a constructivist Grounded Theory methodology (Charmaz, 2006). Results: Within this study clinicians perceived recovery from sexual abuse as a unique, evolving journey which was likely to continue across the lifespan. This journey involved returning to and moving through natural phases of growth and learning which had been interrupted or distorted through abusive experiences. Five distinct phases of recovery emerged; building safety and trust, integrating the experience, building familial relationships, finding self-worth and re-engaging with the world. Clinicians' described a uniquely developmentally sensitive view of recovery in which the significance of family relationships upon recovery was emphasised. Specific concerns around stigma and language use also emerged. Discussion: The findings from this study were discussed in the context of existing research literature in order that the implications for theory and clinical practice could be considered. A methodological critique was also provided.
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Wang, Linna. "Reservoir simulation study for the South Slattery Field." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1400965521&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
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Lowe, Douglas Edwin. "Feasibility study to build a de-inking plant in northern Virginia." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03172010-020109/.
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Bardsley, Martin John. "A study of patient outcomes in an acute hospital." Thesis, London School of Economics and Political Science (University of London), 1991. http://etheses.lse.ac.uk/1355/.
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Outcome measures have been developed in an acute hospital for specific patient groups (primarily cholecystectomy, diabetes, coronary angioplasty and knee replacements). For each condition a set of indicators was derived which ranged from clinical and laboratory measures to measures of general health status. All indicators attempt to show changes in patient health over time. It has been shown possible to collect the necessary data for such outcomes measures. The costs and methods of data collection varied between conditions. Patient completed questionnaires were found to be particularly useful and in inpatient studies have given high response rates (over 95%) for postal follow-ups and have been validated by interviews. The differing ability of the various indicators to show clinical changes has been demonstrated. In all specialties there was found to be generally high levels of association between different indicators. The information collected on patient outcomes was presented at meetings of the various clinical teams and the value of the information in promoting practical change was examined. It was concluded that different indicators have different value in such reviews and that three key characteristics are identified. The first concerns whether the measures reflect clinical or patient's perceptions of health. The second concerns the extent to which an indicator is a direct measure of health or a proxy (or process) measure. The third concerns the extent to which an observed outcome indicator can be linked to particular processes of care. The study has generated support from the clinicians and it is suggested has changed their views on how they judge their own performance. In some instances practical changes have resulted form the presence of the outcome information. The potential future roles for outcome measurement in the health service is discussed.
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Best, Y. Brown Roberto. "An experimental study of heat driven absorption cooling systems." Thesis, University of Salford, 1990. http://usir.salford.ac.uk/14742/.
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The great need for cooling combined with Mexico's large availability of low enthalpy energy from non conventional energy resources such as geothermal energy, solar heat and waste heat from industrial processes, makes it very attractive to utilize these resources for cooling using heat driven absorption systems. The main purpose of the work described in this thesis is to obtain experimental and theoretical data on heat driven absorption cooling systems for the design of large scale systems. Thermodynamic design data have been theoretically derived for heat driven absorption heat pumps and heat transformers using the working pairs ammonia-water and ammonia-lithium nitrate for cooling, heating and simultaneous heating and cooling. The interaction between the operating parameters has been illustrated graphically. A computer model of the steady state thermodynamics of a heat driven ammonia-water system and an ammonia-lithium nitrate system has been developed. A comparison of both systems is made by assessing the effect of operating temperatures and heat exchanger effectiveness on the coefficient of performance for cooling and the heat transfer rates within the system. An experimental study on the performance of the absorber of an absorption cooling system operating on water-lithium bromide has been made. The experimental study of the adiabatic absorber was concerned with the determination of the effect of the evaporator heat load and the absorber reflux on the performance of the absorber. An experimental study of the operating characteristics of an experimental. absorption cooler using water-lithium bromide-lithium iodide and waterlithium bromide-zinc bromide as ternary systems has been made in order to achieve higher coefficients of performance and a lower risk of crystallization. Experimental studies with a small heat driven absorption cooling system operating on ammonia-water using a falling film generator were made. Low generator temperatures were achieved which will'enable the use of non focussing solar collectors as a heat source for the system. An ammonia-water absorption cooler operating on low enthalpy geothermal energy was installed and operated at two geothermal fields. The system was used to cool a small cold storage facility below freezing temperatures. The experimental and theoretical results on absorption cooling systems will provide a basis for the design of heat pump systems for industrial and commercial applications.
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Chadwick, Sarah Louise. "Investigating recovery in psychosis : a personal construct repertory grid study." Thesis, University of Hertfordshire, 2011. http://hdl.handle.net/2299/6372.
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Research regarding the potential value of using a personal construct psychology (PCP) framework to explore recovery in psychosis has been minimal. Mental health policy guidelines (Shepherd et al., 2008) recommend that recovery in mental health is an important area that needs further research. This study aims to further understanding of recovery in service users with psychosis, by examining personal constructs elicited from participants, in contrast to the researcher supplying constructs (Bell and McGorry, 1992). Further, it attempts to define the degree of recovery using the Recovery Assessment Scale (RAS, Corrigan et al., 1999). Thirty two adults from the NHS and voluntary sector participated in the study; each completed a repertory grid (Kelly, 1955). The RAS enabled recovery to be defined by splitting the sample, and comparisons made between low to moderate and high recovery groups. The main findings of the study show that participants in the high recovery group showed less differentiation between their different selves; greater self-esteem; an experienced sense of control over their environment; a higher degree of quality and quantity of support; and a higher degree of hope and goal setting than participants in the low to moderate recovery group. In addition, content analysis (Landfield, 1971) of current self constructs showed that participants in high recovery construed themselves as being more self-sufficient, more active socially, and displayed higher tenderness compared to those in low to moderate recovery. Findings show how repertory grid methods can be applied clinically in order to help with case assessment and formulation, and help facilitate individually tailored therapeutic interventions to enhance recovery. For example, self differentiation findings suggest that to help an individual move towards a higher degree of recovery involves firstly loosening, and then tightening up their construing system. Secondly, self-esteem measures enabled identification of personal goals to strive towards in terms of an individual’s conception of their current and ideal self, and thus steps to take to progress toward recovery. Thirdly, the Pawn and Origin Scale (Westbrook and Viney, 1980) highlighted the degree of control over one’s external and internal world, thus highlighting areas that could be worked on to progress toward higher recovery. Clinical interventions addressing implicative dilemmas were also identified as enabling a change in behaviour, and therefore movement toward recovery. Limitations of the study are discussed, including using HICLAS (De Boeck, 1992) to measure self elaboration in recovery; and future research outlined, including exploring recovery in psychosis through a longitudinal study, and sampling across different mental health populations.
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Letchford, Robert. "A study of functional recovery following anterior cruciate ligament reconstruction." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/91571/.
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Introduction: Anterior cruciate ligament reconstruction (ACLR) and rehabilitation is an accepted intervention for non-coping ACL injured subjects. There is an expectation from ACL injured subjects and the international clinical community that ACLR should enable recovery to pre-injury knee function, activity performance and participation. However, few studies use comprehensive methods to assess this expectation and the reality seems to be a highly variable and often incomplete recovery that is difficult to predict. Improved understanding of recovery of these subjects may identify targets for novel rehabilitation interventions that improve outcomes. Methods: Prospective longitudinal data were collected from 74 ACL injured subjects before surgery and on 5 occasions during the first year following ACLR. Data from a matched healthy group (n=61) were used to define healthy normative values. Outcome measures included; Structure (arthroscopic and MRI findings), Function (IKDC SKF, Lysholm, VAS pain), Activity (2D digital video motion analysis of performance and strategy variables during gait, single leg squat and hop for distance) and Participation (Tegner). Group differences and recovery were assessed with inferential statistics; regression methods identified predictors of recovery. Results: These ACL injured subjects were highly symptomatic non-copers with a prolonged period between injury and surgery. There were statistically and clinically significant deficits from healthy in all outcome measures before surgery, which improved one year following ACLR; however the majority failed to fully recover. Bilateral deficits in activity performance and strategy were identified during all three functional activities. Recovery at one year was not predicted by any of the outcome measures in the pre or post-operative period. However, activity performance at one year was predicted by pre-operative and early post-operative gait velocity and squat depth. Conclusions: Whilst these highly symptomatic non-coping ACLD subjects benefited from ACLR and rehabilitation, expectations of full recovery by one year proved unrealistic for most. Pre-operative deficits appear to be too large for current interventions to overcome. Early diagnostics, classification and intervention should be considered to reduce pre-operative impairments. Bilateral and hierarchical deficits in activities suggest that further development of task oriented rehabilitation strategies should be built on biomechanical and motor control/learning theories to improve outcomes. Utilising technology to facilitate greater engagement in rehabilitation and increasing frequency and intensity of rehabilitation interventions should be considered. Further development of clinically applicable methods to measure and provide real time feedback on both performance and strategy in functional activities are therefore required.
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Anderson, Darcy J., and Darcy J. Anderson. "Central Avra Valley storage and recovery project geochemical modeling study." Thesis, The University of Arizona, 2000. http://hdl.handle.net/10150/626879.
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The chemical and isotopic characteristics of the groundwater in A vra Valley,
Arizona, were investigated, and existing hydrologic information was compiled to
determine processes affecting groundwater chemistry in this area. The characteristics
of Central Arizona Project (CAP) water, the surface water source for recharge
operations in the Central Avra Valley Storage and Recovery Project (CAVSARP), were
investigated for comparison. The changes that occurred over time in the chemistry of
the groundwater were evaluated with respect to vadose zone processes and mixing with
CAP water during recharge operations. Two major vadose zone processes were
identified: flushing of perched water remaining from historical agricultural irrigation,
and cation exchange as recharged CAP water infiltrated through clay layers at the site.
Geochemical modeling using PHREEQC was conducted for groundwater, CAP
water and mixtures of the two waters to determine processes that could affect recharge
rates and the chemical composition of groundwater that will be recovered for delivery
to customers. The results of the modeling were used to infer the likelihood that mineral
precipitation and ion exchange occurred during the study period of January 1998 to
December 1999. Based on the modeling results, significant mineral precipitation and
subsequent decreases in recharge rates seems unlikely. Cation exchange processes will
continue to alter the chemical composition of the CAP water between the recharge basin
and its arrival at the water table.
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Edison, Stephen Harvey. "Process study for convective heat recovery in an oil refinery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0026/MQ62124.pdf.
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White, Sandra L. "Recovery from trauma through experiential reframing| An empirical phenomenological study." Thesis, University of West Georgia, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10109212.
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The researcher used phenomenological psychological analysis to explore the experiences of recovery from childhood psychosocial trauma of seven adult participants through the use of Experiential Reframing (ER). ER is a psychotherapeutic modality of clinical significance because it may allow patients to overcome the amygdaloidal hijacking and distorted meanings incident to traumagenic triggers in a relatively short-term intervention. The recollected experiences of participants’ before, during and after interventions were collected through semi-structured interviews. Study results were then tied to neurobiological research that might correspond with the phenomenological experiences of participants. Before treatment experiences of participants were marked by phobic relationships to anxiety and other emotions. The protocol served to reveal to patients the relationship between past experiences and current dysfunction. Post treatment, participants had new experiences of trigger events, specifically an ability to stay present to current experience, theorized to be the result of successful enough reconfiguring of autonomic system responses to certain somatosensory-based cues. The phenomenology of recovery was that there was a sudden shift that opened up the ability to deploy an observing ego perspective in the aftermath of (previously) trauma triggering events, but that the process was quite effortful for the first few times. While the experience of effortful mediation of experience in the aftermath of a trauma trigger never went away entirely for participants the process did become easier. Phobic positions with respect to emotions and anxiety dissolved, latent anxiety lowered, and lives opened up.
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O'Meara, Niamh. "REACT - Recovery Enhancement from TBI using ACT : a feasibility study." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6688/.
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Objective: There is a growing body of research which demonstrates positive effects of Acceptance and Commitment Therapy (ACT) on a diverse range of psychological disorders (e.g. chronic pain, depression, psychosis). Several reviews suggest that ACT may benefit people struggling to adjust to life following a Traumatic Brain Injury; however there are no published treatment trials using ACT with this group. The present study examined the feasibility of an intervention trial of ACT for people with severe Traumatic Brain Injury (TBI) treated in an inpatient rehabilitation centre. The findings informed recommendations made for the design and conduct of a larger study. Method: Mixed quantitative and qualitative methods were used including Focus Groups and questionnaire measures. Data were collected from patients and unit staff at multiple time points across three research sites. Focus Group data were analysed using thematic analysis in accord with best practice guidelines. Questionnaires and forms completed by the staff in order to establish application of inclusion/exclusion criteria and participant flow were analysed descriptively to get an indication of the acceptability of features of the study protocol. Results; Focus group findings indicated that due to cognitive deficits exhibited by participants, they perceived the ACT intervention as being too complex, and a number of amendments were suggested to support participants with cognitive deficits in future trials such as increasing repetition of key processes during intervention. Further suggestions were made in relation to future conduct of the study protocol such as revising the inclusion/exclusion criteria, family involvement in data collection, and provision of easy read materials to clients. Results indicated that participants had no issue with the randomisation design, there were no adverse events associated with the study protocol or intervention. Conclusions: Further piloting of the amended intervention protocol in line with recommendations made in this study is recommended prior to drawing any conclusion with regard the suitability and acceptable of ACT with people with a severe TBI in an inpatient facility. Further research should consider the amendments to the study protocol as recommended in this study.
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Lo, Pei-Chin, and 羅珮芹. "The Study of Brand Recovery." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/00083993645872658231.
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碩士中原大學
企業管理研究所
96
How should marketers use advertisement to recover the consumers’ negative impression when these consumers have negative impression for a new brand? This is an important task for marketers. There are three experiments in this study. In study 1, we compare the effects of brand recovery by way of comparative/non-comparative advertisings. In study 2 and 3, we focus the effect of advertising argument and advertising appeal. The results are as followed： 1. Under a positive initial impression, the comparative advertising has greater revision effect than non-comparative advertising. However, under a negative initial impression, non-comparative advertising has greater revision effect than comparative advertising. 2. When consumers have negative initial impression, the revision effects of consumers are not affected by the strength of advertising argument. Considering the consumers’ regulatory focus, promotion-oriented consumers have greater revision than prevention-oriented consumers under strong advertising argument. And prevention-oriented consumers have greater revision than promotion-oriented consumers under weak advertising argument. 3. When consumers have negative initial impression, the revision effects of consumers are not affected by the rational or emotional advertising appeal. Considering the consumers’ regulatory focus, promotion-oriented consumers have greater revision than prevention-oriented consumers under emotional advertising appeal. And prevention-oriented consumers have greater revision than promotion-oriented consumers under rational advertising appeal. The results of study are same as Muthukrishnan and Chattopadhyay (2007). These findings can help marketers to determine what type of advertisements they should use in different initial impression.
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Lee, Min, and 李敏. "Failure Type, Recovery Attributes, and Recovery Justice：A Study of Scenario Experiment." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/58555601289121272444.
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碩士大葉大學
人力資源暨公共關係學系
96
Along with the globalized development, economical reforming is the inevitable tendency, but service industry growth also gradually receives takes seriously, the people increase regarding the service demand, the service quality is more important.This research by “the just theory” the concept, the discussion combination of service failure and serves recovery, and turns over to afterward whether can have further development space. By the literature discussion, “the service fault type” and “the service remedial treatment” will present by the different just consciousness way, because of different just consciousness's combination matching, will discuss whether to recover satisfaction to have the influence. This research carries on the experiment by the situation script way, measuring after reading the situation story, to recovery satisfaction carries on a topic reply, altogether has 120 to accept measuring the experiment. Then discusses its correlation effect because of the card side assignment and the general liner model. The experimental result to turns over to for the remedial treatment to have the influence afterward; Service fault type and in service remedial treatment different just consciousness combination, although has not had the remarkable interactive effect regarding recovery satisfaction, but the main effect actually reaches obviously. By way of this research discovery, when the service fault production, adopts the apology the remedial treatment, its recovery satisfaction is higher than only then adopts the substantive compensation the remedial treatment.
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Lee, Ching-Yun, and 李錦雲. "The Study of Delay of Service Recovery and Satisfaction of Service Recovery." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/58382213322568025853.
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碩士中國文化大學
國際企業管理研究所
91
The purpose of this study is empirically to examine the relationship between the delay of service recovery and customers’ satisfaction of the service recovery. We’ve based on the following hypotheses to explore this study: the service recovery is an important factor of affecting customers’ satisfaction; furthermore, customers believe that service provider’s failure can be amended by effective and proper service recovery, and will reduce the negative effect on the customers because of service failure. To all enterprises, especially to the service industry, it is inevitable that during the process of service delivery, the occurrence of service failure will happen. Nevertheless, with completed and timely service recovery strategies, customers can be regained, loyalty can be promoted, and customer satisfaction can be fulfilled, as well as goodwill plus repurchase can be up-lifted. Therefore, once the service failure occurs, a swift and effective service recovery program should be put into work immediately, in order to cut down the loss of customers and to escalate the customer satisfaction. We’ve adapted the experimental design method in our study and 320 questionnaires have been analyzed. Four important results have been found as follows: 1.The worse the service failure has been made, the lower customer evaluation in terms of service recovery satisfaction, repurchase and goodwill shall occur. Negative influence on service appraisals is inevitable. 2. The better the service recovery is provided, the higher customer evaluation in terms of service recovery satisfaction, repurchase and goodwill shall occur. Positive influence on service appraisals is recognized. 3. The longer the delay of service recovery is taken, the lower customer evaluation towards after service recovery satisfaction. Negative influence on after service recovery evaluation is expected. 4. Under the mild level of service mistake, the delay of service recovery will cause a significant interruptive effect on service recovery satisfaction evaluation by customers. The conclusion of this study has shown that under the influence of service recovery satisfaction, the service failure and service recovery programs has far more influence than the delay of service recovery
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LIAO, BAO-WANG, and 廖寶旺. "Study on equalization and timing recovery." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/98626134060533157831.
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Teng, Jui-Ping, and 鄧瑞彬. "The Study of Gas Hydrates Recovery." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/70439266657197493265.
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碩士國立成功大學
資源工程學系碩博士班
91
The purpose of this study is to investigate the dissociation mechanism in connection with its physical and/or chemical properties and then to estimate the gas production using thermal recovery and depressurization recovery. A simple energy balance method is used to calculate the recovery of gas hydrates. In additions, hot steam injection method, Huff and Puff method and depressurization method are also used to calculate the decomposition of gas hydrates, radius change with time and the quantity of natural gas released from gas hydrate. In the study of simple energy balance method, the net gas recovery efficiency is probably below 10% in which the heat injection efficiency and the combustion efficiency are both 50% (the cost and recovery time do not take into consideration). The modified model (Marx and Langenheim, 1959) had been used in this study to calculate the dissociation area and the cumulative methane gas production changing with time. It is assumed that the thickness of reservoir is 30m, the reservoir porosity is 30%, the saturation of gas hydrates is 20%, and the hot steam injected into the reservoir with constant rate (the hot steam injection rates are between 208B/D and 1040B/D). When the hot steam injected into the reservoir about 16 years, the dissociated radius of hydrates are between 23m and 51m, and released natural gas about 2.5*106 SCM to 1.3*107 SCM. In using the Huff and Puff recovery technique with hot steam injection for 16 years, the dissociated radius of hydrates is about 45m and released natural gas about 2.5*106 SCM. The heat loss in the hot steam injection and in the reservoir is a large portion. In the depressurization method, hydrates dissociate by means of decrease the reservoir pressure, and the effect on the gas production by several pressure drops is studied. By the assuming reservoir parameters and the reservoir permeability of 1mD, the radius of dissociated hydrates are between 41 m and 93.7m, for the case of producing the gas for 16 years at constant production rate (the rates are between 300SCMD and 1500SCMD). The pressures of the reservoir are between 42 atm and 49 atm. Based on the results of this study, there is no feasibility to recovery gas hydrate by using thermal recovery and depressurization recovery under current technology. More economic and efficiency recovery methods should be studied.
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Li, Wei-Hsin, and 李維新. "Study on Sustainable Chromium Shavings Recovery." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/84427160412535239986.
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碩士國立屏東科技大學
環境工程與科學系
94
Abstract Student ID No.：N9231012 Title of Thesis：Study on Sustainable Chromium Shavings Recovery Total Pages：77 Name of Institute：National Pingtung University of Science and Technology Name of Department：Department of Environmental Science and Engineering Date of Graduation：January, 2006 Degree Conferred：Master Name of Student：Wei-Hsin Li Adviser：Jy-Gau Sah The Contents of Abstract in this Thesis： Leather industry generates over 11,000 tons of Cr shavings each year in Taiwan. For a long time, most of the leather industries co-invested shavings resource recovery companies treat leather meal to be fertilizer. In 2005 the Council of Agriculture had amended law to limit fertilizer content and component from industry wastes. It makes the leather meal recover process confront choke point. The Cr tanning process makes leather good physical-chemistry property. Because Cr containing of leather wastes ever exceed environmental standard, leather industry are attached to be polluting business. Many studies were focused on no-Cr tanning process, like used mineral salts, botany tannins and organic salts. However, these replaceable methods make products less anti-wet, less anti-light, lower stability and higher cost than those from Cr tanning process. After reviewing relative leather shaving literatures, such as the multi-steps extraction, two steps extraction of MgO and enzyme, CaO hydrolyzing, NaOH boiling, high temperature activation, incineration washing and three-steps alkalinity hydrolyzing, except the high temperature activation was used to produce active carbon, all others were used to recover protein and Cr. In this research we selected steaming and heating to extract Cr shavings for assessing the effect of detach Cr from shaving. Chromium in six shaving samples were analyzed. TCLP of Cr ranged from 31.5 to 105.6 mg/L and total Cr ranged from 25,550 to 36,650 mg/kg. The results showed the shavings have high total Cr and TCLP extractable Cr. The percentage of extractable Cr to total Cr is 4% at most. Steaming makes Cr less extractable from shavings. Detach Cr reaction must be in aqueous. Heating in NaOH solution makes Cr less extractable than steaming. Raising temperature or concentration oxalic acid and EDTA make more Cr extractable. In room temperature, extractable Cr also direct proposed to shake time in aqueous. But shaking is not as good as heating. Heating of shavings on 0.5N oxalic acid solution may result the maximum to 85.44%. Compared to relative recovery Cr shavings methods, we found two-steps extracting method had investigated well on reagents, dosage, operate condition and cost. This method is possible applied because it had pilot scale industrial practice. Using oxalic acid and EDTA need further research to raise efficiency and decrease the cost. Recently the EPA had amended law that shavings can be treated not only in steam leather meal. According to the rule, hazardous wastes treatments were allowed to be incinerated and solidified. Incineration may produce secondary pollution. Solidification will decrease land use capacity. Therefore, high cost makes factories temporary store their wastes. Latest amend law disaffect or derive other contamination. The only three leather waste resource companies in Taiwan had fall on predicament because leather meal is difficult selling on fertilizer market. If they want to keep on operate, they must change process or develop other product. Extracting method is presently the most mature Cr detach technique. Resource companies can treat wastewater by their existed wastewater system. Other methods such as electrokinetics, electrolysis, film separation that had effective applied on soil and groundwater remediation can also be referenced on Cr shavings recovery. Government ought to allow more integrate-way to treat shavings in the future. The sustainable methods shall dissipate Cr shavings effectively, not destruct organic structure, and prevent secondary pollution. Key word：Leather Industry, Cr Shavings, Leather Meal, Steam
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Li, Yun-Ren, and 李昀衽. "The study of recovery of waste PCB." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/80609226184845313957.
Full textAbstract:
碩士國立雲林科技大學
環境與安全工程系碩士班
94
PCB, printed circuit boards, have been produced in Taiwan since 1969. In 2000, the amount of the waste PC board were surprisingly went up to 38,932 tons. The law of waste disposal and its revision made in 2002, it is prohibited to burn or bury any waste computer related product directly without any proper recycling. Further, people should not discard unusable electrical products, which may cause environmental pollution and the resources waste. This study is to divide the waste PC board into different smaller pieces, and dissolve them in the acid solution with different concentrations. Then the acid solutions was dried to crystallize, copper will be collected by going through the process of electrolysis. After the acidolysis, the waste PC board can be recycled to make artificial marble materials and porcelain, etc. Since gold can not be dissolved in acid solutions, we can collect it by filtration. The waste PC board was divided into 2mm pieces. After that, put these pieces into a 5.15M nitric acid at the room temperature for 24 hours, and 95% of copper on the PC board was dissolved. Finally, the crystalloid of the acid solution was dissolved as the electrolyte, and the copper was recovered by electrolysis. The result of this study shows that copper was collected efficiently by setting the electric current of 3A. The recovery efficiency of the copper reached to 65% in the 10 hours, 98% in 26 hours under the electrolysis of 3A. When the concentration of the copper ions decrease, the recovery rate of copper would be dropped. In order to keep a higher concentration of the electrolyte, which can keep collecting copper steadily, more crystalloid of the acid solution to be added. By using the above method, the total recovery rate of copper from the PC board reached to about 93% and 0.1199g gold (purity：99.92％) was obtained from 250g waste PC board.
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Yang, Chun-Wei, and 楊竣崴. "A Study of Image Authentication and Recovery." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/51294241094860137641.
Full textAbstract:
碩士國立中興大學
資訊管理學系所
97
Today’s watermarking techniques can be divided into two types. The first type is robust watermarking technique which can resist malicious attacks better. The second type is fragile watermarking technique, also called image authentication, can verify whether the image is tampered in the process of image transfer or not. There are some applications requires accurate images such as medical or military images which users need to employ original images. Based on those specific requirements, we proposed a scheme of image recovery. The first proposed scheme improves the robust digital watermarking technique based on random sequence into reversible watermarking technique. Therefore, this method will use the robust watermarking technique of the well-known random sequence as embedding approach. Sobel edge detection technique is employed to extract the pixel value of edges from the watermarked image. And the final watermarked image is produced by replace the original image corresponding to the pixel value of the edges for the purpose of embedding watermark. Because the robust watermarking technique can tolerate the image which is destroyed to protect the copyright, there is no watermarking examination problem although this approach causes some loss of watermark information according to the experiment result. Moreover, it can not only examine whether the image has embedded watermarks, but also restore the original image. Majority of researches related to the image authentication are mainly focusing on improving the robustness and the ability of tamper detection on image authentication. The practical application of restrictions on reversible watermarking technique, which can’t tolerate any image processing attack, neither can tell whether the image is tampered or not. Nevertheless, image recovering is also an important issue. We proposed an image tamper detection and recovery method, which can recovery image effectively, especially for images with large tampered regions. First, a secret key is used to obtain a random sequence and determine where to embed watermarks on the basis of this random sequence. As a result, it is hard to find out the corresponding location of watermarks from embedded images. Later, through vector quantization, we create an index table as a basis for recovery and embed it in the original image. Finally, Wong’s watermarking scheme is integrated to perform tamper detection and achieve image authentication and recovery. Summary of our method, Wong’s watermarking scheme is employed to perform tamper detection. Wong’s watermarking scheme can be used to accurately locate tampered regions. If an image has been tampered, the index table can be used to recover the tampered regions. Although the image recovery technique unable to restore the image completely, receiver can identify the tampered locations and recovery immediately, as it will save additional bandwidth to retransmit the image. According to the experiment results, the first method we propose only needs to pay 5.61 k bytes overheads in average for restoring original images. Besides, the second method has the higher probability of image recovery and our scheme provides not only a better quality of recovered images but also better results at edge regions.
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Teng, Chi-Wen, and 滕紀妏. "Feasibility Study of Copper-Containing Sludge Recovery." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37330996717590275580.
Full textAbstract:
碩士國立屏東科技大學
環境工程與科學系
94
The waste could be regard as resource wrongly disposed. When the reusable value of waste is higher than the handling charge could it be seen as resource. The ultimate goal of waste management is sustainable used by efficiently/economically resources recycle. The production of hazardous heavy metal sludge in Taiwan has reached 820,000 tons per year. Sludge disposal technologies such as solidification and landfill are irrelevantly. Therefore, this study is conducted by the procedures of acid extraction-chemical cementation and acid extraction-fractional precipitation to recovery copper from copper sludge of printed circuit board industry. Analysis data shows that copper in sludge is around 19%, followed are Ni, Pb, Zn, Cd, Cr, and Fe. The acid extraction results shows the best extraction conditions are found by 2N H2SO4(aq) and HNO3(aq) in solid-liquid ratio 1:10 for 0.5小時. Moreover heavy metals in residues after 2N H2SO4(aq) and distilled water extraction can reach the TCLP standards, and can be look as general industrial wastes for landfill. But the Pb and Cd in residues after the same processes are higher than the TCLP standards, and must be treated further again. The chemical cementation experimental results show that after 2N H2SO4(aq), HNO3(aq) extraction and followed by Fe and Zn displacement, about 93-100% Cu can be displaced. Moreover copper purity are about 44-50% 72-75% by using Fe and Zn as displacement metals, respectively. The fractional precipitation experimental results show that the purity of recovered anhydrous CuSO4(s) high to 85% after three times precipitating purified by 2N H2SO4(aq) extraction solution. The cost-benefit analysis indicates that using the procedures of acid extraction-chemical cementation and acid extraction-fractional precipitations for copper-containing sludge are feasible. The process must be of great helped to the environment and resource sustainable used.
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Chen, Cheng-Ta, and 陳鉦達. "The Study of Corporate Image, Service Recovery." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/75197098065621330772.
Full textAbstract:
碩士中國文化大學
國際企業管理研究所
90
Understanding the role of corporate image in the customer retention decision is a key issue, however, it has received little attention in the service marketing area. Most customers consider that the corporate with better image usually takes better service re-covery measures. According to disconfirmation of expectation theory, however, better corporate image actually makes customers produce over-exceeding recovery expecta-tions process and leads to lower postrecovery satisfaction. This research uses experiment framework with totally 18 groups to investigate two different kinds of corporate images against three different degrees of service failures and recoveries. In summary, the results show that corporate image is positively related to recovery expectations. In turn, corporate image and recovery expectations have sig-nificant impact on postrecovery satisfaction.
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Te-chunWang and 汪德君. "A Study on Recovery Time and Repair Cost of School Buildings in Post-earthquake Recovery." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/26939111156524168302.
Full textAbstract:
碩士國立成功大學
建築學系碩博士班
101
The heavy damage of earthquake losses in recent years ,which is unavoidable, resulted in much interest on seismic risk evaluation of buildings. This study investigated school buildings on the estimation of post-earthquake reconstruction cost and duration needed. The surveyed 274 school buildings suffered damage in Chiahsien, Hualien, Taitung, and Hengchun earthquake were divided into two types : retrofitted school buildings and non-retrofitted school buildings. First , using survival analysis and nonlinear regression we derived the probability curves in log-normal distribution and then derived the probability curves of recovery time and repair cost. Further, we analyzed the school buildings of recovery time and repair cost after earthquake,using the retrofitted,non-retrofitted and all school buildings of the curves. The application of these curves are demonstrated in the buildings of junior high and elementary schools in Chiayi city assuming every school experienced their DGA. This research also assumed that all the buildings were retrofitted before earthquake and compare results to current status of the school constructions.
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Jong, Wen-Yan, and 鍾文彥. "A Study on Depth Recovery from Defocus Images." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/92322219759219316786.
Full textAbstract:
碩士國立中興大學
土木工程學系
86
This research studies the recovery of depth of an object plane fromdefocus images. The S-transform algorithm was applied to solve for thespace parameters of objects from defocus images taken under various settings of apertures of the camera''s optical system such that the object distances were computed accordingly. The blur circles of defocus images of point light sources serve as the basis in this research. The differences between an actual camera and an ideal geometric optical system were discussed. Considering the point spread function of the blur circles, this research applies circular low-pass filters on different images to simulate their corresponding defocus images. Experimental images were taken and object distances were computed for understanding the advantages and defects of depth recovery from defocus images. Empirical results show that the sizes of the blur circles of point light sources were affected by the diffraction of light which make the measured diameters larger than theoretically computed values. Overall, the space parameters of objects critically dominate the precision of object distances solved from the defocus images. Keyword：Depth from defocus, DFD, S-transform, Blur circle, Point Spread Function.
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Lin, Yi-Lun, and 林逸倫. "A Study of Waste Heat Recovery Power Transformer." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/2jmt8v.
Full textAbstract:
碩士國立臺北科技大學
能源與冷凍空調工程系碩士班
98
The purpose of this study is to develop building can be equipped with power transformers, apart from indirect heat loss of power supply, the system heat recovery feasibility robin to verify power transformer not only has high-voltage transformation for home voltage effect. It can turn the heat produced by the body to use the principles of the room temperature by circulating water into more hot water, bath shower supply staff to work purposes or other purposes require the use of hot water . Of power transformers for the plant or building, hotel user must have the high-voltage electrical equipment, power transformers in China the average efficiency is about 98%, such as the 1000KVA transformer set its load 1000KW, its efficiency was 98.3%, calculate the transformer copper loss plus the loss of total iron loss is about 17KW, heat loss of this magnitude will bring high temperature atmosphere, causing a large number of air-conditioning system load, the global warming is more serious, such heat transmission from the power transformer would reduce the water circulation system cost effectiveness better than other electric water heater through the consumption of electrical energy converted to heat several times higher than the role of such systems to the power transformer substation for the purpose of heat source can be achieved, the added value they receive. This research is carried out through to brass mount transformer insulating oil to room temperature water in the coil in the loop, transformer coils and absorb the heat generated by core, recovery and storage of the experimental use of high-voltage power transformers, low voltage power transformer (7.5 KVA) of two different specifications of transformers, power supply via the transformer to operate, with the most suitable for the recovery of various occasions. In order to test this experiment a much wider range of heating source, fast real-time, when the heating source in the test used by a variety of time use or a combination of high pressure (low) power transformers, solar panels, a power-storage function of lead-acid batteries, common electricity plug. After deriving the most economical recycling system, following the experiment to test further to obtain the thermal effects of the data system for research, from actually results indicate assumption water recovery efficiency is 50%, in the manufacture of hot water , can be 17.5 liters of water at room temperature increases the average temperature from 20 ℃ to 50 ℃, heating effect of 12.5 kJ of heat, just took about 34 minutes. Can be proved from the above data, the consumption of power transformers can really heat recovery unit to the heating of the benefit.
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Lin, Shi-Yau, and 林士堯. "Study on Recovery /Pollution-free for EAF dust." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/79184510247139165080.
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Timy-Con and 曾國松. "Study on Attack Recovery Function in Instrusion Detection." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/14834287611936617226.
Full textAbstract:
碩士中華大學
資訊工程學系碩士班
93
The computer virus, computer worms , hacker attack, network attack etc… , they are serious problems in computer now. However there are two major reasons cause these problem, (1) OS(Operating System) or application software design bug . (2) Communication protocol design bug. The OS (Operating System) design bug usually can produces computer virus or computer worm attack. Now, some OS(Operating System) company or anti-virus company can be downloaded the software that can fix these problem, but it can not be avoid the problem such as Synflood attack if the communication protocol design bug happens. This paper approaches the solution for networking attack. Major using IDS (Instruction Detection System), it can evaluate the attack actives and response and confirm the message of ACK or FIN from the damager server via IDS(Instruction Detection System), it can avoid the waste time and computer resource for waiting response attack or computer deadlock.
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FANG, HUNG-HSIANG, and 方泓翔. "Cases Study on Travel Disputes and Service Recovery." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/79739922874979926633.
Full textAbstract:
碩士南臺科技大學
休閒事業管理系
105
Enhancing the quality of tourism to reduce travel disputes has become an important issue in the tourism industry. In this study, case study research method is used as to collecting data from thedocumentations and archivalrecords.A total of 40 tourism dispute cases are analyzed. At the same time service recovery, afterward follow-ups and preventions will be illustrated for each case. The majority number of travel disputes which are caused by itinerant content in the 40 cases according to the results of the analysis. The main problems include the cancelled items, the service of tour guild and tour leader, others. If each travel agent can effectively control the quality of itinerary item and professionally train the sales, tour guild and tour leader, the proportion of travel disputes would be numerous reduce. Finally, I also propose service quality and recommendations of follow-up research for the results of the study.
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"Couples in recovery: A qualitative and narrative study." Tulane University, 1999.
Find full textAbstract:
This research explored the processes of relational healing in couples with one partner recovering from alcoholism or other psychoactive substance dependence. The participants were successfully recovering married couples, defined as couples (a) with one or both partners having been substance dependent while in the current marriage; (b) with the formerly substance dependent partner having attained at least two years of sobriety; and (c) with both indicating their desire and intention to continue their marriage. Focused joint interviews of six couples were conducted, videotaped, and transcribed to written text. Social constructionism and narrative psychotherapy provided the philosophical and practical bases for the questions. Couples were invited to be co-investigators offering their theories about their own and others' ideas and practices that had contributed to their relational resilience, and commenting on the researcher's interpretations of their stories. Norman Denzin's method of interpretive interactionism provided a framework for the research design and analysis of data, which included deconstruction of prior understandings of the phenomenon in the literature and of experiences in the cultural context of the interviews, the bracketing of key words and themes, and a search for epiphanies, or the moments and experiences that had been particularly salient in shaping the meanings the co-investigators attributed to their lives or relationships. Key words found included fear, love, work, honesty , synonyms for gratitude, loss of control or detachment, Twelve-Step language, and the language of spirituality. A narrative analysis explored the co-investigators' uses of contrastive rhetoric. Questions for further research are raised, and implications for social work education, practice, and policy are suggestedacase@tulane.edu
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Yang, Po-Jen, and 楊博仁. "Credit Risk-Study of Taiwan Companies'' Recovery Rate." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/61795590141825211143.
Full textAbstract:
碩士東吳大學
會計學系
90
While globe economy continue going down recently, financial distress, or even default, of companies have been experienced more than before. Typically, creditors and investors used credit risk model to quantify the probability of the occurrence of default, in order to mitigate loan or investment’s credit risk. When CreditMetricsTM, a credit risk model developed by RiskMetrics Group, was brought in and used to measure potential losses caused by credit risk in Taiwan, however, the recovery rate in this model was usually assumed to be zero. Instead of zero, U.S. historical recovery rate patterns were the alternative choice. Neither zero nor U.S. statistics can appropriately be a good agent to reach satisfied result of risk exposure measurement in Taiwan market. Because of the reason, the purposes of this paper are to: 1.develop a formula that can appropriately calculate Taiwan companies’ recovery rate, 2.compare Taiwan companies’ recovery rate, that would be based on the formula above, with U.S. historical statistics, and 3.calculate recovery rates in difference catalogs, according to the basic concepts of new Basel Accord. Data collected for empirical study begin from January 1, 1997, to June 30, 2001,and 30 companies were selected for sample. Descriptive statistics and t-test are used to be the method of data analysis. Conclusions reached in the paper are: 1.The average recovery rate in Taiwan is 14.69%, with standard error 0.563. When extraordinary items were excluded, the average recovery rate becomes 23.60%, with standard error 0.287. Further, negative ones were modified; the average recovery rate is 23.60%, with standard error 0.287. 2.Taiwan’s average recovery rates are lower than U.S. statistics. 3.No matter how to group the sample data, the empirical results mostly were significant. In other words, it can be accepted that degree of financial distress and recovery rate are negative related. Also, the statement that secured loan’s recovery rates are higher than unsecured is not rejected. Some minor results show great variance and insignificance were induced by specific characteristics.
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張御傑. "A Study on Image Hiding, Authentication, and Recovery." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/73716556067343724450.
Full textAbstract:
博士國立交通大學
資訊科學與工程研究所
97
In this dissertation, we propose several techniques to protect important data and private images in a transmission or storage system. For a confidential image or secret data, two hiding methods are proposed to conceal the existence of the hidden data in the cover images. Because people often compress digital images to reduce the waiting time of the receiver before transmitting the images, the first method uses the search-order coding to embed secret data in the index file of the vector quantization compression result. The proposed method causes no distortion to the VQ version of the image, and the receiver end can obtain both the hidden data and the VQ image. To embed a bigger confidential image, the MSOC scheme in the second method utilizes the feature of high correlation among adjacent pixels (i.e. neighboring pixels are often with similar gray-values) to encode the important image. An adjustable threshold T is used in the MSOC; and this T directly controls the quality of the extracted image. In the embedding part, we use a variance-based criterion to estimate the hiding capacity of each pixel in the cover image. Then the MSOC code is embedded in the cover image using two sets of modulus function. Experimental results show that the quality of both the stego-images and extracted important images are competitive to those obtained in many existing steganography methods reported recently. To protect important images in public environment, we develop two image authentication methods along with different recovery abilities. The first method is used to protect a single image. In the method, the authentication data for each block is generated using some related information within the block, and then embedding it into the block to serve as the attestation for the integrity of the image. Meanwhile, the recovery data obtained by vector quantization technique are shared by using an (r, n)-threshold sharing method, and then scattered all over the image. The proposed method can not only detect whether malicious manipulations have occurred, but also self-recover the tampered parts. In the transmission of multiple images, it is possible that the network connection is unstable; and hence, some images at the receiver end are lost. To solve this problem, we develop an image authentication method with cross-recovery ability to protect a group of images. In the method, a two-layer sharing scheme is designed to preserve the recovery data of all images. The proposed method can not only verify the integrity of each member of the image group, but also reconstruct those lost images by the mutual support of the surviving members.
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Chen, Hueny-Wei, and 陳惠未. "Study on Resource Recovery of Aluminum Foil Package." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36805850997790552277.
Full textAbstract:
碩士朝陽科技大學
環境工程與管理系碩士班
99
This study focuses on discussing the public viewpoints about the knowledge in resource recovery of aluminum foil package, and the public viewpoints about the attitudes and behavior toward resource recovery of aluminum foil package. The results can be the references for recycling propaganda. The objective is to expect people can realize the importance of personal behavior toward nature environment by recycling propaganda. The factors and the intentions toward resource recovery of aluminum foil package include personal background, the knowledge, attitudes and behavior of recycling. First of all, confirm the theme, background, motivation and the purpose of this thesis. Establishing research framework by literature review and analysis. To design and revise questionnaire by deleting the questions which be found have less efficiency from pre-tested. Then starting to send formal questionnaire after confirmed the reliability and validity of questionnaire. Collating and coding data after receiving questionnaire, and using SPSS as analytic tool to analyze all data. Do empirical analysis by some statistical methods, such as descriptive statistic, factor, reliability, variance, and regression analysis. The analysis results show that there is significance difference between the difference personal background (e.g., sexual, marital status, age, level of education, career and living form) and the knowledge in resource recovery of aluminum foil package. Also, there is a significance difference between the difference personal background and attitudes, behavior to resource recovery of aluminum foil package. In this research several suggestions were provided to the factory owners and future researchers who interested in resource recovery of aluminum foil package. Keywords：Aluminum foil package, resource recovery, SPSS statistics
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Wu, Tsung-Lin, and 吳宗霖. "Study of Image Authentication and Recovery of ROI." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/76033716680822401762.
Full textAbstract:
碩士國立臺灣海洋大學
資訊工程學系
101
The ROI (regions of interest) is the key region of a medical image which is related to the physician’s diagnostic accuracy. We proposed a block-wise and content-based image watermarking authentication scheme which can provide image recovery and prevent tampering attacks. The image is segmented into two regions: the regions of interest (ROI) and the regions of background (ROB). In our scheme, the ROI information is embedded into the ROB regions. Such embedding procedure is performed for multiple times, and the recovered ROI information is constructed by the principle of majority. We use the technologies of discrete cosine transformation (DCT) and least significant bit (LSB) insertion to achieve the recovery of image in ROI. The watermark sequence is extracted from ROI and it is embedded into the LSB of ROB’s. The advantage of the LSB embedding method is the large amount of information that can be hidden in image. The experimental results show that our scheme outperforms previously proposed ones and can resist various attacks.
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Lee, Pao-Huang, and 李柏宏. "Study on the Recovery Rate of Industrial Water." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/p2u5xf.
Full textAbstract:
碩士淡江大學
水資源及環境工程學系碩士班
106
Although there is abundant rainfall in Taiwan, it cannot be effectively utilized due to topography and concentrated rainfall. In the case of limited open source, the reuse of water resources is considered a very important issue. The new "Regulations for Review of Water Usage Plan" are implemented from the perspective of water management to control new water demand, improve recovery rate and water-saving measures. As the recovery rate is the index to review the water efficiency of a factory, this study takes the recovery formula as the starting point, and further explores whether the recovery rate of the " Regulations for Review of Water Usage Plan " is suitable for the domestic calculation. In this study, several recovery formulas are collected and consolidated on the basis of the definition of " Regulations for Review of Water Usage Plan ". The water use data of the selected industries are then substituted into the formula, for the purpose of investigating the recovery values, and further understanding the reasons to cause the differences of those values. Furthermore, this research is also to apply two models of analyses: circulation water and evaporation water, to explore whether it will be appropriate to include the aforementioned circulation water in the cooling tower and the evaporated water in the calculation formula. At the end, it is also to select a more suitable formula for the future calculation of the domestic water recovery rate. The results of this research show that, the recovery rate of the circulating water in the cooling tower is high, as the relevant water amount is large. If to take this sort of water as a part of the formula to calculate the water recovery rate, it cannot easily distinguish the pros and cons regarding the water-saving efficiency among the manufactures of the selected industries. Moreover, although to deduct the amount of evaporated water from the denominator of the formula can rise the recovery rate, it is not consistent with the original principle of water saving. To further explain, as the amount of evaporated water goes up, more water is to be taken out thus cause the result of “more used water, higher recovery rate”. Besides, it is also to note that direct cooling water is considered as the priority of the water use in some industries. Then, if this kind of water is not included in the calculation, the effects which are already made will be ignore and neglected. Therefore, it is important to regard this kind of water as an important re-use of the water. To conclude, formula 2 of the " Regulations for Review of Water Usage Plan " is considered suitable for the domestic manufactures to calculate the water recovery rate. It suggests to include only this formula in the future regulations, as it will be more effective for policy promotion, and will be easier for relevant manufactures to follow the regulations.
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Huang, Wen-Ham, and 黃文翰. "A study of the Relationship Among Service Recovery Disfirmation, Service Recovery Satisfaction and Consumer Behavior Intention." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/02517378904325684383.
Full textAbstract:
碩士國立東華大學
觀光暨遊憩管理研究所
90
Abstract: This study extends previous research by applying RECOVSAT instrument to investigate Taiwanese with service failure and recovery experience while dining at restaurants in Taiwan. In addition to explore the impact of certain antecedents to service recovery expectation, the study discusses the relationships among service recovery expectation, service recovery performance, service recovery disconfirmation, service recovery satisfaction and consumer behavior intention via disconfirmation theory . The relationships of these variables were specified in the review of literature and a conceptual framework was proposed. A questionnaire survey with trained interviewer was employed. Each interviewer was required to interview 8-10 subjects. A total of 777 respondents with critical service failure and recovery experiences of restaurants in Taiwan were asked to participate in the study. The result indicates that both problem severity and controllability failure attribution had a positive effect on service recovery expectation. Service recovery expectation had a negative effect on service recovery disconfirmation, but no effect on service recovery satisfaction. Service recovery performance had positive effects on service recovery disconfirmation and service recovery satisfaction. Service recovery disconfirmation had a positive effect on service recovery satisfaction. Service recovery satisfaction had a positive effect on customer loyalty, but indicates a negative effect on customer compliant behavior.
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Bratt, William. "Spiritual experiences and trauma recovery: a qualitative study on how spiritual experiences inform recovery from trauma." Thesis, 2011. http://hdl.handle.net/1828/3453.
Full textAbstract:
This study examines how people who have survived trauma have encountered healing following spiritual experiences. The significance of this research lies in its unique findings, contributing to the body of literature on trauma recovery. Qualitative methodology and thematic analysis were used to explore the research question that guided this study.
Six individuals who had survived traumatic events participated in narrative interviews and were asked to tell the story of how their spiritual experiences impacted their healing from trauma. Findings show that these participants‘ spiritual experiences helped them to cultivate a foundation to return to in future moments of challenge, impacted the body‘s healing, and served as a guide.
Further research in the field is suggested, including investigating how experiences with Kundalini energy impact trauma recovery, the relationship between spiritual experiences and physical healing, and how people from diverse cultural backgrounds experience trauma recovery in the wake of a spiritual experience.Graduate