Academic literature on the topic '97I70'

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Journal articles on the topic "97I70":

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Watson, L. C., J. D. Pritchard, J. B. Hearnshaw, P. M. Kilmartin, and A. C. Gilmore. "HD 9770, a southern active-chromosphere system." Monthly Notices of the Royal Astronomical Society 325, no. 1 (July 11, 2001): 143–50. http://dx.doi.org/10.1046/j.1365-8711.2001.04404.x.

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Qamila, Qamila, Rukhayati Rukhayati, and Abdul Rahman. "Pengaruh Keterampilan dan Profesionalisme Terhadap Prestasi Kerja Aparatur Sipil Negara Pada Fakultas Tarbiyah dan Ilmu Keguruan Institut Agama Islam Negeri Palu." Jurnal Kolaboratif Sains 4, no. 10 (October 15, 2021): 561–65. http://dx.doi.org/10.56338/jks.v4i10.1980.

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Tujuan penelitian Untuk mengetahui dan menganalisis keterampilan dan profesionalisme secara simultan dan parsial berpengaruh signifikan terhadap prestasi kerja aparatur sipil negara pada Fakultas Tarbiyah dan Ilmu Keguruan Institut Agama Islam Negeri Palu. Adapun hasil penelitian berdasarkan uji regresi linear berganda dengan nilai Adjusted R-Square = 0,977 sama dengan 97,70%, menggambarkan bahwa variabel prestasi kerja dipengaruhi oleh variabel keterampilan dan variabel profesionalisme sebesar 97,70%. Berdasarkan hasil data analisis uji regresi nilai koefisien regresi sebesar 0,325, dengan nilai t sebesar 0,000. Dengan demikian nilai sig t < 0,05 pada taraf kepercayaan 95%. Pada hasil data analisis uji regresi variabel profesionalisme, nilai koefisien regresi sebesar 0,653, nilai t 0,000. Serta nilai sig t < 0,05 pada taraf kepercayaan 95%. Hal ini mengindentifikasikan profesionalisme berpengaruh terhadap prestasi kerja.
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Tay, Eng Guan, Kok Ming Teo, Tin Lam Toh, Pee Choon Toh, Weng Kin Ho, Khiok Seng Quek, and Yew Hoong Leong. "Teaching undergraduate mathematics - a problem solving course for first year." Teaching Mathematics and Computer Science 20, no. 2 (December 7, 2022): 183–206. http://dx.doi.org/10.5485/tmcs.2022.0532.

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In this paper we describe a problem solving course for first year undergraduate mathematics students who would be future school teachers. Subject Classification: 97B50, 97B70, 97D50, 97D60, 97F60, 97U30
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Anders, Michael, Sherry Johnson, and Drew Toler. "Board #202 - Program Innovation Simulated Organ Donation Requests (Submission #9770)." Simulation in Healthcare: Journal of the Society for Simulation in Healthcare 9, no. 6 (December 2014): 441. http://dx.doi.org/10.1097/01.sih.0000459341.19168.49.

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Sánchez-Miranda, Yerania, Violeta Martínez-Alcántara, Vania Zamara Preciado-Sánchez, Silvia Graciela Moysén-Ramírez, Montserrat Hidalgo-Vargas, Martha Hervert-Jonguitud, Nancy Ojeda-Luna, et al. "Bioseguridad y manejo de la vía aérea en el paciente pediátrico con infección por SARS-CoV-2." NCT Neumología y Cirugía de Tórax 79, no. 4 (2020): 265–77. http://dx.doi.org/10.35366/97970.

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Carrera Cruz, Diana Laura, Brian Benito Domínguez González, César Alberto López Jaime, and Carlos Tadeo Perzabal Avilez. "Neumoperitoneo secundario a neumatosis quística intestinal." Anales Médicos de la Asociación Médica del Centro Médico ABC 65, no. 4 (2020): 311–14. http://dx.doi.org/10.35366/97470.

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Rodríguez-Reséndiz, F., C. Tomás-Reyna, A. Mallen-Trejo, and G. Sommer-Larraza. "Recomendaciones para el reinicio de cirugía ortopédica electiva post-COVID-19 en México." Acta Ortopédica Mexicana 34, no. 3 (2020): 176–82. http://dx.doi.org/10.35366/97070.

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Hernández-Alcaraz, Melissa, and Jesús Ernesto Dueñas-Arias. "Frecuencia de cromosoma Filadelfia en niños con leucemia linfoblástica aguda." Revista Mexicana de Pediatría 87, no. 5 (2020): 170–75. http://dx.doi.org/10.35366/97170.

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Telich-Tarriba, José E., Daniel  Garza-Arriaga, Ahilyn Leyva-Vázquez, and José  Telich-Vidal. "La ginecomastia tuberosa, una entidad poco reconocida en la práctica quirúrgica actual." Acta Médica Grupo Ángeles 18, no. 4 (2020): 414–17. http://dx.doi.org/10.35366/97270.

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Patty, Simon I., Doni Nurdiansah, Marenda Pandu Rizqi, and Rikardo Huwae. "Analysis of Mangrove Vegetation and Distribution Using Landsat 8 Images In Bolaang Mongondow East, North Sulawesi." Jurnal Ilmiah PLATAX 10, no. 2 (June 25, 2022): 28. http://dx.doi.org/10.35800/jip.v10i2.41069.

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Mangrove is one of the objects that can be identified by remote sensing technology using satellite imagery. Analysis of the distribution and density of mangrove vegetation using Landsat 8 imagery was carried out in Bolaang Mongondow Timur, North Sulawesi in September 2020. This study aims to map the distribution of mangroves and determine the correlation between NDVI values, canopy cover, and mangrove density. The data analysis used Landsat 8 images with ENVI 5.3 and ArcGIS 10.1 software. Maximum likelihood classification is used to separate mangrove and non-mangrove features. The calculation of mangrove vegetation density using the NDVI algorithm and single-channel classification using the density slice method to divide mangrove density based on the range of pixel values of the NDVI image. Next, to test the accuracy of the classification results using an error matrix (confusion matrix) and the NDVI vegetation index correlation test compared with canopy cover and density data. The classification resulted in four different land cover classes with an overall accuracy of 97.70% and a kappa coefficient of 0.9688. The mangrove vegetation distribution from the classification results is 524.75 ha. The NDVI correlation with the percentage of canopy cover is very significant with a correlation coefficient (r) = 0.9516, while the NDVI correlation with density resulted in moderate correlation (r = 0.5315).Keywords: density; mangrove; Landsat 8; NDVI AbstrakMangrove merupakan salah satu objek yang dapat diidentifikasi menggunakan teknologi penginderaan jauh yakni memanfaatkan citra satelit. Analisis sebaran dan kerapatan vegetasi mangrove menggunakan citra Landsat 8 telah dilakukan di Bolaang Mongondow Timur, Sulawesi Utara pada bulan September 2020. Penelitian ini bertujuan untuk memetakan sebaran mangrove dan mengetahui hubungan korelasi antara nilai NDVI dengan tutupan kanopi dan kerapatan mangrove. Pengolahan data citra Landsat 8 dengan perangkat lunak ENVI 5.3 dan ArcGIS 10.1. Klasifikasi maximum likelihood digunakan untuk memisahkan fitur mangrove dan non mangrove. Perhitungan kerapatan vegetasi mangrove dengan algoritma NDVI dan klasifikasi saluran tunggal menggunakan metode density slice untuk membagi kerapatan mangrove berdasarkan rentang nilai piksel citra NDVI. Uji akurasi hasil klasifikasi menggunakan matriks kesalahan (confussion matriks) dan uji korelasi indeks vegetasi NDVI dengan data tutupan kanopi dan kerapatan. Hasil klasifikasi mendapatkan empat kelas tutupan lahan yang berbeda dengan overall akurasi sebesar 97,70 % dengan kappa coefisien sebesar 0,9688. Luas sebaran vegetasi mangrove dari hasil klasifikasi adalah 524,75 ha. Korelasi NDVI dengan persentase tutupan kanopi termasuk korelasi sangat kuat dengan koefisien korelasi r = 0,9516 sedangkan korelasi NDVI dengan kerapatan termasuk korelasi sedang (r = 0,5315).Kata kunci: kerapatan; mangrove; Landsat 8; NDVI

Dissertations / Theses on the topic "97I70":

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Ngoua, Ella Cyrrus. "Connaissances mobilisées par les élèves du secondaire dans le domaine des fonctions, approche comparative entre la France et l'Afrique francophone." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCD066.

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Cette thèse en mathématiques porte sur la notion de fonction. En effet, nous nous intéressons aux connaissances mobilisées, savoirs utilisés, par les élèves du secondaire, en France et en Afrique francophone, devant des tâches liées aux fonctions selon trois points de vue : didactique, épistémologique et cognitif. Dans une première partie, la thèse étudie la façon dont les fonctions nous sont données à travers L'histoire de ce concept en s’appuyant sur l’article The Concept of Function up to the Middle of the 19th Century du professeur A.P YOUSCHKEVITCH.La logique mathématique moderne a découvert des difficultés pour une définition universelle, non-algorithmique, d'une fonction.Dans une seconde partie, nous nous posons la question de savoir ce que savent faire les élèves avec les fonctions ? Pourquoi cette question ? En effet, la notion de fonction occupe une place importante dans les programmes scolaires ainsi que dans chacune des épreuves de mathématiques surtout au baccalauréat En notre qualité d’enseignant, nous avons voulu comprendre ce qui peut expliquer l’échec des élèves à l’épreuve de mathématiques au secondaire. Afin de mieux cerner ce qui peut expliquer les phénomènes observés chez les élèves du secondaire lors de la résolution des tâches liées à la notion de fonction, nous avons décidé de partir d'un corpus construit selon la formulation d'Elena Tognini-Bonelli. De l’analyse de ce corpus de tâches et d’activités élèves côté élèves, côté enseignants et côté institution, il en ressort que : la définition de la notion de fonction n'est pas assimilée par les élèves du secondaire ; ils sont arrivés à un niveau algorithme de l'utilisation des fonctions ; L'entrée par les tâches est mieux indiquée pour enseigner les fonctions ; la conformité de voir f ou f(x) dans un tableau, etc. Nous avons en amont rappelé les résultats des travaux antérieurs au notre en rapport avec l’enseignement de la notion de fonction
This thesis in mathematics deals with the notion of function. Indeed, we are interested in the knowledge mobilized, knowledge used, by secondary school students, in France and in French-speaking Africa, in front of tasks related to functions according to three points of view: didactic, epistemological and cognitive. In the first part, the thesis studies the way functions are given to us through The history of this concept based on the article The Concept of Function up to the Middle of the 19th Century by Professor A.P YOUSCHKEVITCH:logic modern mathematics has discovered difficulties for a universal, non-algorithmic definition of a function. In a second part, we ask ourselves the question of what can students do with functions? Why this question ? Indeed, the concept of function occupies an important place in the school programs as well as in each of the mathematics tests, especially in the baccalaureate. In our capacity as teachers, we wanted to understand what can explain the failure of students in the mathematics test in secondary school. In order to better understand what can explain the phenomena observed in secondary school students when solving tasks related to the notion of function, we decided to start from a corpus built according to the formulation of Elena Tognini-Bonelli. From the analysis of this corpus of student tasks and activities on the student side, on the teacher side and on the institution side, it emerges that: the definition of the concept of function is not assimilated by secondary school students; they have arrived at an algorithmic level of the use of functions; Entry by tasks is best suited for teaching functions; the conformity of seeing f or f(x) in a table, etc. We have recalled beforehand the results of work prior to ours in relation to the teaching of the notion of function
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Tew, Jerry. "The politics of the family and family therapy : a critical analysis of theory and practice." Thesis, University of Warwick, 1992. http://wrap.warwick.ac.uk/97170/.

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This thesis aims to develop a new theoretical framework by which to understand family organisation and the processes of family therapy from a political perspective - a framework that will highlight (changing) power relationships rather than assume some notion of functional order. In constructing and evaluating such a theoretical framework, I will draw upon the traditions of critical theory and qualitative research. My starting points are an overview of existing critical understandings of 'the family', and an examination of how 'power' itself may be theorised in a rigorous manner. I will review how such perspectives may expose specific relations of oppression or recognition that underpin particular forms of organisation, from the scale of the social formation as a whole to that of 'the individual'. Psychoanalysis and discourse theory have provided concepts whereby to deconstruct the dynamics of 'the individual' - in particular the concept of 'subjectivity' - which I will develop further so as to encompass participation, not just in discursive structures, but also in structures of emotional and material relations. In a critical appraisal of the various theoretical and practice traditions within family therapy, I will look at how the hegemony of systems theory has begun to be questioned and alternative metaphors for familial organisation proposed. However, as I will argue, none of these provide a satisfactory basis for understanding power relations in the family. I will therefore go on to apply a new conceptualisation of family organisation - that of 'subjectivity' - which is developed out of the theoretical traditions discussed earlier. I will theorise 'the family', not just as the context in which individual subjectivity may be constructed, but as an entity that may be seen to participate in the social formation as a subjectivity in its own right. Instead of understanding familial organisation as a natural outcome of self-regulating processes (as in systems theory), it may thus be seen to reflect the ways in which a family may have been constructed as a subjectivity in and by an oppressive social formation - its coherence only being maintained by a degree of internal violence and repression. Building on this, I will develop a theoretical framework by which to analyse, from a political perspective, the breakdown of family functioning and the specific ways in which the organisation of family life may be reconstructed through the processes of family therapy. Following on from this, I will test out the value of the theoretical framework in an analysis of three examples of family therapy practice. My source material is transcripts taken from videotapes of actual family sessions, and these are analysed in terms of the evidence they provide of minute-by-minute changes in power relations within family organisation (often in response to particular interventions by the therapist). Out of this in-depth study of a small number of case examples, my primary aim will be to assess the practical value of the various elements of the theoretical framework in exposing how familial power relations have been structured and how (and whether) they may be modified during the course of family therapy. In turn, this may enable me to reach some preliminary conclusions as to how specific family therapy interventions may affect family organisation in ways that are either oppressive or empowering.
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Occhilupo, Luca. "Le figure genitoriali nella famiglia ipermoderna e le loro conseguenze sul discorso di genere." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9770/.

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In questo studio abbiamo voluto tentare un approccio multifunzionale per l’analisi della società moderna, più precisamente per analizzare la figura della donna e dell’uomo in questa epoca, figure che non potrebbero essere analizzate senza considerare le tematiche genitoriali e familiari che sono alla base della società stessa, italiana e non solo. Abbiamo voluto indagare sia la figura materna che quella paterna, prendendo spunto dalle opere di Massimo Recalcati e di John Bowlby che tanto hanno meditato per quanto riguarda il rapporto della madre e del padre con il proprio figlio. Ci è sembrato necessario partire dalla famiglia e dalle figure genitoriali poiché queste costituiscono le fondamenta, sin dai tempi antichi, di ogni società, e considerare come sono variate tali figure nell’epoca ipermoderna costituisce un punto essenziale per delineare alcuni punti fondamentali di quella che Zygmunt Baumann ha definito società liquida. La scienza medica ha insegnato che alla base della «cultura» (in senso antropologico), di ogni cultura, sta il tenace legame del figlio con la propria madre, in un rapporto di dipendenza biologicamente determinato dalla prolungata infanzia dell’essere umano, condizionandone l’intera esistenza e, in qualche modo, sottraendogli sempre il raggiungimento della piena maturità. Infatti bisogna considerare che l’intera esistenza di un uomo, di qualsiasi essere umano, è influenzata da ciò che egli vede e sente nei primi anni di vita (nei primi 3 anni di vita, secondo la scienza), pertanto il rapporto con la madre, il primo rapporto con la figura materna, è basilare per la vita futura dell’individuo. Una volta terminato il ruolo materno, ossia quando il ragazzo è pronto per entrare nella società, è il padre (o meglio, la figura paterna) ad accompagnarlo nel suo raggiungimento della virile maturità e a prenderlo per mano durante il periodo, cosiddetto, della castrazione (psicologica), ossia della piena maturità e del distacco dal “seno materno”. Il femminismo con i suoi movimenti degli anni ’70 ha portato ad una rottura, ad una vera e propria rivoluzione nel rapporto tra le parti. La donna ha acquisito una sempre maggiore consapevolezza portando non solo ad un nuovo e rinnovato tipo di femminilità, ma anche, dirimpetto, ad una differente tipologia di mascolinità, probabilmente meno consapevole e più debole, alimentando una sorta di sentimento ginecofobico che acuisce man mano che si va avanti, nonché un’assenza di dialogo tra i due universi, quello femminile e quello maschile, con una paura di fondo da parte di quest’ultimo.
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Batty, Stephen. "Content based retrieval of PET neurological images." Thesis, Middlesex University, 2004. http://eprints.mdx.ac.uk/9770/.

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Medical image management has posed challenges to many researchers, especially when the images have to be indexed and retrieved using their visual content that is meaningful to clinicians. In this study, an image retrieval system has been developed for 3D brain PET (Position emission tomography) images. It has been found that PET neurological images can be retrieved based upon their diagnostic status using only data pertaining to their content, and predominantly the visual content. During the study PET scans are spatially normalized, using existing techniques, and their visual data is quantified. The mid-sagittal-plane of each individual 3D PET scan is found and then utilized in the detection of abnormal asymmetries, such as tumours or physical injuries. All the asymmetries detected are referenced to the Talairarch and Tournoux anatomical atlas. The Cartesian co- ordinates in Talairarch space, of detected lesion, are employed along with the associated anatomical structure(s) as the indices within the content based image retrieval system. The anatomical atlas is then also utilized to isolate distinct anatomical areas that are related to a number of neurodegenerative disorders. After segmentation of the anatomical regions of interest algorithms are applied to characterize the texture of brain intensity using Gabor filters and to elucidate the mean index ratio of activation levels. These measurements are combined to produce a single feature vector that is incorporated into the content based image retrieval system. Experimental results on images with known diagnoses show that physical lesions such as head injuries and tumours can be, to a certain extent, detected correctly. Images with correctly detected and measured lesion are then retrieved from the database of images when a query pertains to the measured locale. Images with neurodegenerative disorder patterns have been indexed and retrieved via texture-based features. Retrieval accuracy is increased, for images from patients diagnosed with dementia, by combining the texture feature and mean index ratio value.
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Garforth, Lisa. "Green utopias : imagining the sustainable society." Thesis, University of York, 2002. http://etheses.whiterose.ac.uk/9770/.

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Burston, John. "The kinematic effects of three quarter and full length foot orthoses on anterior knee pain sufferers when walking and descending stairs." Thesis, University of Central Lancashire, 2013. http://clok.uclan.ac.uk/9770/.

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Background: Patellofemoral pain is a common disorder whose aetiology is complex often being described as multifactorial, increased load of the patellofemoral joint is often attributed to foot function. Foot orthoses are commonly prescribed for this condition; however the mechanisms by which they work are poorly understood. Previous studies using single segment foot models have hypothesised that it may be control of the midfoot which hold the key to understanding orthotic control. Over the last decade biomechanical analyses has advanced so it has become possible to divide the foot into segments, however no previous studies have investigated the use of orthoses on different segments of the foot when shod. The overall aim of this study was to investigate the differences seen in the kinematics and kinetics of the lower limb between a patellofemoral pain group and a group of normals when using a standardised orthosis prescription during walking and descending a step. Method: Initially fifteen healthy subjects had foot orthoses moulded to their feet, they were asked to walk at a self-selected pace and complete a 20cm step down; comparisons were made between sandals and shoes, plus two different orthoses. Kinematic and kinetic data were recorded using 10 Oqus cameras and 4 AMTI force platforms. The shoe data from the 15 healthy subjects was re-analysed and used as a control group to compare against 15 subjects diagnosed with patellofemoral pain. The foot was modelled using the calibrated anatomical systems technique (CAST) fixing the marker set directly on the feet and shoes of normal subjects which permitted comparisons of excursions between the shoes and sandals and the effects of the orthoses. Results 1: Similar changes in the pattern of movement were seen between the shoe and the sandals conditions with and without the orthoses; the shoes reduced the excursions recorded except the transverse plane of the rearfoot. At the knee maximum extension was increased and maximum flexion at toe off was reduced by the orthoses. Initial Conclusions: Expectedly the shoes reduced the range of motion over the sandal condition in most planes; however the similar effects seen with the orthoses in both types of footwear suggesting it was acceptable to use shoes in the later study. Results 2: Significant differences were seen between the healthy subjects and the patellofemoral pain subjects at the foot and the knee. Both orthoses produced statistically significant results at the foot. In addition there was a significant reduction in the knee coronal plane moment range during the forward continuum phase of step down; this was attributed to a change in the ground reaction force as there were no changes reported in the kinematics of the knee. Conclusions: The method of placement of the markers was able to detect small changes within the foot segments. This study identified potentially important differences between the patellofemoral pain subjects and the normals in both the knee and foot segments. However due to the lack of pain during the walking and step down trials it could not be determined if the changes were due to pain avoidance mechanisms or if they were causative factors. Many of the changes produced by the orthoses tended to be local to the foot, except for the knee coronal plane moment range during the forward continuum phase of step down. To the authors knowledge this work is unique in its investigation of the motion of foot segments while shod and confirmed the clinically held belief it is essential to consider footwear when prescribing orthoses to patients. The use of foot mechanics could be of interest to further research and may help to define sub-populations within this condition.
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Islam, Shahida. "Time controlled photo-oxidation of polyolefins by polymer bound additives." Thesis, Aston University, 1992. http://publications.aston.ac.uk/9770/.

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A variety of iron compounds containing vinyl or thiol functional groups (used as photoactivators) have been synthesised and some of these were successfully bound to both polyethylene and polypropylene backbones during processing in the presence of peroxide and interlinking agent. Concentrates (masterbatches) of the photoactivators in PP and PE were prepared and the pro-oxidant effect of the diluted masterbatches in absence and presence of an antioxidant was evaluated. An antioxidant photoactivator (FeDNC ) was found to sensitise the photoactivity of pro-oxidants (Metone A / Metone M) whereas an antioxidant (ZnDNC) was found to stabilise the polymer (PP and PE) containing both of these combinations. It was observed that the lower concentration of FeDNC sensitises the stability of the polymer containing very small concentration of NiDNC whereas higher concentration of FeDNC stabilises the polymer (LDPE) containing same amount of NiDNC compared to FeDNC alone. The photostability of unstabilised PP containing FeAc could be varied by varying the concentration of ZnDEC. Both the induction period and the UV - life time of the polymer increased by increasing concentration of ZnDEC. It is suggested that ligand exchange reaction may take place between FeAc and ZnDNC. A polymer bound UV stabiliser (HAEB) and a thermal stabiliser (DBBA) were used with a non extractable photoactivator (FeAc) in PP. Small concentrations of the stabilisers (HAEB and DBBA) in combination with the photoactivator (FeAc) sensitise the polymer. The antioxidant present in commercial polymer (LDPE and PP) was found to be of a hindered phenol type, which was found to antagonise with ZnDNC when used in combination with the photoactivators.
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Oliveira, Ricardo Velozo Marcondes de [UNESP]. "Estudo da viabilidade energética de amortecedores regenerativos por indução com ênfase nos carros elétricos." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/97070.

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Made available in DSpace on 2014-06-11T19:28:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-02Bitstream added on 2014-06-13T20:18:24Z : No. of bitstreams: 1 oliveira_rvm_me_guara_parcial.pdf: 66709 bytes, checksum: f4f3206ca41bd83189beae1bf8b69b3f (MD5) Bitstreams deleted on 2015-06-25T13:01:14Z: oliveira_rvm_me_guara_parcial.pdf,. Added 1 bitstream(s) on 2015-06-25T13:03:30Z : No. of bitstreams: 1 000696266_20160705.pdf: 66532 bytes, checksum: 1f05953ef8756ecc1eb12aa9cc9a7f99 (MD5) Bitstreams deleted on 2016-07-25T13:17:33Z: 000696266_20160705.pdf,. Added 1 bitstream(s) on 2016-07-25T13:18:42Z : No. of bitstreams: 1 000696266.pdf: 2158771 bytes, checksum: e50302868940c5c20e1c3aadd8149123 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os conhecidos automóveis elétricos tem seu desenvolvimento datado do início do século XIX, porém ainda não possuem a autonomia e o preço condizentes com a realidade da atual sociedade motora. Baseando-se na teoria desenvolvida no trabalho Estudo de amortecedores regenerativos por indução, que se objetiva na possibilidade teórica de geração de energia elétrica pelos amortecedores automotivos, o presente trabalho dá continuidade ao proposto com a finalidade de se verificar experimentalmente a exatidão deste método de referência e a viabilidade desta alternativa como sistema regenerativo para os carros elétricos, de modo a auxiliar sua autonomia e contribuir com o seu desenvolvimento sustentável. Assim, procura-se definir uma base de referência para que esta realidade seja mais promissora com o uso cotidiano de solicitação da suspensão do automóvel. Esta proposta vem inspirada também pela atual necessidade de que formas alternativas de geração de energia sejam exploradas, objetivando a administração sustentável dos combustíveis fósseis e o desenvolvimento da tecnologia de transporte. Salientando que sistemas regenerativos já são uma realidade nos dias atuais, como as células fotovoltaicas e o KERS já equipando alguns modelos. A análise e conclusão deste trabalho abre espaço para futuros estudos a fim de que os amortecedores produzam energia elétrica, e confirma a viabilidade desta proposta, com um potencial sustentável promissor para geração de energia limpa; esta energia pode ser armazenada e utilizada para regenerar baterias ou até mesmo acionar comandos elétricos, de modo a ser mais uma alternativa para os veículos que se utilizam de eletricidade, procurando balancear a oferta e demanda de energia para o transporte
The electric cars have known its development dating from the early nineteenth century, but still lack the autonomy and the price commensurate with the reality of actual motor society. Based on the theory developed in the work “study regenerative shock induction”, which aims at the theoretical possibility of generating electricity for automotive shock absorbers, this work continues to the one proposed in order to experimentally verify the accuracy of the reference method and viability of this alternative as a regenerative system for electric cars, in order to help their autonomy and contribute to its sustainable development. Thus we seek to establish a baseline so that this reality is more promising with the everyday use of the request for suspension of the car. This proposal is also inspired by the current call for alternative forms of energy generation, aiming at sustainable management of fossil fuels and transport technology development. It should be emphasized that regenerative systems, such as photovoltaic cells and the KERS already equipping some models are a reality today. The analysis and conclusion of this work paves the way for future studies so that the shock absorbers produce electricity, and confirm the viability of this proposal, with a promising potential for sustainable clean energy generation. This power generated can be stored and used to regenerate batteries or even to trigger electrical devices, besides being one more alternative to vehicles that use electricity, competing to balance the supply and energy demand for transports
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Dória, Karolina Marie Alix Benedictte Van Sebroeck [UNESP]. "Identificação e caracterização de um isolado do Hydrangea ringspot virus em hortênsia no Estado de São Paulo." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/97170.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A hortênsia é um arbusto semilenhoso muito apreciado como ornamental no Brasil. No Brasil podemos ressaltar a “Região das Hortênsias” no Sul do país, onde esta ornamental é utilizada em projetos de jardinagem em casas e rodovias. A cidade de Gramado têm a hortênsia como sua flor símbolo. No Estado de São Paulo, ela é comumente encontrada na Região de Campos do Jordão. Plantas de hortênsia apresentando anéis cloróticos e necróticos foram observadas por Yuki et al. (2005) em material proveniente de Arujá, estado de São Paulo. Transmissões por extrato vegetal permitiram a observação de lesões locais cloróticas em Chenopodium quinoa e Gomphrena globosa, indicando infecção causada por vírus. Desta forma, o presente trabalho teve como objetivo a identificação e caracterização da espécie viral presente nestas amostras. Inicialmente as amostras foram analisadas por microscopia eletrônica, onde puderam ser observadas partículas alongadas filamentosas, medindo cerca de 490 nm, indicando a provável presença de um potexvirus. Oligonucleotídeos específicos Hyd_senso e Hyd_anti_senso foram desenhados para o Hydrangea ringspot virus (HdRSV), um potexvirus encontrado comumente em países Europeus e nos Estados Unidos. O RNA total foi extraído pelo método de Bertheau et al. (1998), para posterior análise por RT-PCR utilizando-se estes oligonucleotídeos. Dois fragmentos, um em torno de 550 e outro de 250 nucleotídeos foram amplificados e purificados para realização do sequenciamento genético. Uma identidade de nucleotídeos de 96% e 88% para o fragmento maior e menor respectivamente foi observada para HdRSV (número de acesso AJ 707100.1), indicando tratar-se desta espécie viral. O HdRSV até então era uma praga exótica no Brasil, de forma que foi realizada comunicação ao Ministério da Agricultura, Pecuária e Abastecimento, que emitiu parecer...
The hydrangea is an ornamental plant very appreciated in Brazil. In South of Brazil, this plant is used in projects for gardening in houses and highways. Hydrangea is the symbol of Gramado´s city. In State of São Paulo this ornamental plant is commonly found in Campos do Jordão. Hydrangea plants showing leaves with chlorotic and necrotic rings were observed by Yuki (2005) in material proceeding from Arujá, State of São Paulo. Chlorotic local lesions were observed on Chenopodium quinoa and Gomphrena globosa, after sap transmission, indicating infection caused by virus. On electron microscope analysis, virus particles with 490 nm could be 4 visualized indicating infectin by a potexvirus. In order to identify the species of virus infecting these plants, specifics primers (Hyd_senso and Hyd_anti_senso) were design for Hydrangea ringspot virus (HdRSV), a potexvirus commonly found infecting hydrangea in Europe and United States. Total RNA was extracted following Bertheau et al., 1998 protocol’s and the primers were used in RT-PCR. Two fragments, one around 550bp and another one of 250 nucleotides were amplified and sequenced. An identity of nucleotide of 96% and 88%, respectively, was observed for HdRSV (number of access AJ 707100.1), indicating that both fragments amplified were from the virus. As the HdRSV is an exotic pest in Brazil, the occurrence was notified to the Ministry of Agriculture (MAPA) that gave us the permission for publication this data (process 21052.015361/2007-08). To evaluate the dissemination of this virus in the matrices of hydrangea used in the commercial production in Brazil, 17 samples of the region of Arujá – SP were analysed for the presence of the virus. Eight of them were infected by virus, and the RT-PCR fragment from the varieties Azul Rendado, Azul LZR, Renat Blue, Rosa Japonesa, Rosita and Vermelho Comum were sequenced for analysis... (Complete abstract click electronic access below)
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Panariello, Beatriz Helena Dias [UNESP]. "Eficácia da imersão e da escovação mecânica combinada com diferentes agentes de limpeza de prótese na redução da viabilidade de biofilme multiespécies." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/97270.

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O objetivo deste estudo foi investigar a eficácia da escovação com diferentes agentes de limpeza para reduzir a viabilidade de um biofilme multiespécies em resinas acrílicas. Amostras de Lucitone 550 (L) e Tokuyama Rebase Fast II (T) (10 mm x 2 mm) foram preparadas, esterilizadas e inoculadas com uma suspensão de 107 células/mL de Candida albicans e Candida glabrata e de 108 células/mL de Streptococcus mutans. As amostras foram incubadas por 48 h a 37 °C para a formação do biofilme. Em seguida, foram divididas (n = 12) e submetidas à escovação ou imersão durante 10 s nas soluções: água destilada (A); ácido peracético 0,2% (Ac), digluconato de clorexidina 1% (Chx), solução água/dentifrício 1:1 (D), hipoclorito de sódio a 1% (NaOCl) e perborato de sódio (Pb). Os microrganismos viáveis foram avaliados por ensaio de XTT e contagem de colônias (ufc /mL). Os dados foram verificados por ANOVA e teste de Tukey com nível de significância de 5%. Neste estudo, a eficácia da remoção do biofilme foi aumentada pela escovação combinada com agentes químicos de limpeza, por outro lado, a imersão por 10 s em AC e NaOCl mostrou-se tão eficaz quanto a escovação em L e T. Este resultado é bastante interessante, pois a imersão nestes agentes de limpeza por um curto período poderia ser uma alternativa viável para a desinfecção de próteses de pacientes com dificuldades motoras para executar a escovação.
The aim of this study was to investigate the efficacy of brushing with different cleaning agents in reducing the viability of multispecies biofilm in acrylic resins. Lucitone 550 (L) and Tokuyama Rebase Fast II (T) specimens (10 mm x 2 mm) were prepared, sterilized and inoculated with a Candida albicans and Candida glabrata suspension of 107 cells/mL and a suspension of 108 cells/mL of Streptococcus mutans. Specimens were incubated for 48 h at 37°C for the biofilm formation. Then, they were divided (n=12) and subjected to brushing or immersion for 10 s in the solutions: distilled water (W), 0.2% peracetic acid (Ac), 1% chlorhexidine digluconate (Chx), 1:1 water/dentifrice solution (D), 1% sodium hypochlorite (NaOCl) and sodium perborate (Pb). Viable microorganisms was evaluated by XTT assay and colony counts (cfu/mL). Data were performed by ANOVA and Tukey test with 5% significance level. In this study, the efficacy of biofilm removal was increased by brushing combined with chemical cleaning agents, on the other hand, immersion for 10 sec in NaOCl and AC has shown to be as effective as brushing for L and T. This result is quite interesting, inasmuch as immersion in these cleaning agents for a short period could be a viable alternative for prostheses disinfection of patients with motor disabilities to perform the brushing.

Books on the topic "97I70":

1

McKenzie, Stephen Paul. Reality Psychology. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-97170-0.

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Godziewski, Charlotte. The Politics of Health Promotion. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-97870-9.

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Kinsella, Ray, and Maurice Kinsella. Troikanomics. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97070-7.

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Lusti, Markus. Dateien und Datenbanken. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-97170-9.

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Mohr, Hans, and Peter Schopfer. Pflanzenphysiologie. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-97370-3.

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Schäfer, Marcus. Einsatz und Bewertung von Exotischen Optionen. Wiesbaden: Deutscher Universitätsverlag, 1998. http://dx.doi.org/10.1007/978-3-322-97770-0.

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Scholz, Ronny, ed. Quantifying Approaches to Discourse for Social Scientists. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97370-8.

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Wiesendanger, Roland, and Hans-Joachim Güntherodt, eds. Scanning Tunneling Microscopy III. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-97470-0.

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Mohr, Hans, and Peter Schopfer. Plant Physiology. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-97570-7.

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Ziegler, Ingrid. Politische Bildung an der Grundschule. Wiesbaden: VS Verlag für Sozialwissenschaften, 1988. http://dx.doi.org/10.1007/978-3-322-97170-8.

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Book chapters on the topic "97I70":

1

Wehner, Christa. "Einleitung." In Überzeugungsstrategien in der Werbung, 11–17. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_1.

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Wehner, Christa. "Theorie der persuasiven Kommunikation und empirische Befunde." In Überzeugungsstrategien in der Werbung, 18–47. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_2.

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Wehner, Christa. "Die Dynamik persuasiver Werbekommunikation: einige Erklärungsversuche." In Überzeugungsstrategien in der Werbung, 48–58. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_3.

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Wehner, Christa. "Anlage der empirischen Untersuchung." In Überzeugungsstrategien in der Werbung, 59–70. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_4.

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Wehner, Christa. "Ergebnisse." In Überzeugungsstrategien in der Werbung, 71–149. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_5.

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Wehner, Christa. "Persuasive Kommunikation und Werbung: ein Fazit." In Überzeugungsstrategien in der Werbung, 150–55. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_6.

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Wehner, Christa. "Anhang." In Überzeugungsstrategien in der Werbung, 156–87. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_7.

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Wehner, Christa. "Literatur." In Überzeugungsstrategien in der Werbung, 188–208. Wiesbaden: VS Verlag für Sozialwissenschaften, 1996. http://dx.doi.org/10.1007/978-3-322-97070-1_8.

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Hetterich, Volker. "Einführung." In Von Adenauer zu Schröder — Der Kampf um Stimmen, 11–17. Wiesbaden: VS Verlag für Sozialwissenschaften, 2000. http://dx.doi.org/10.1007/978-3-322-97470-9_1.

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Hetterich, Volker. "Konzeptioneller Rahmen." In Von Adenauer zu Schröder — Der Kampf um Stimmen, 19–30. Wiesbaden: VS Verlag für Sozialwissenschaften, 2000. http://dx.doi.org/10.1007/978-3-322-97470-9_2.

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Conference papers on the topic "97I70":

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"Front Matter: Volume 9770." In SPIE OPTO. SPIE, 2016. http://dx.doi.org/10.1117/12.2239917.

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Karev, Artem, and Peter Hagedorn. "Simultaneous Resonance and Anti-Resonance in Dynamical Systems Under Asynchronous Parametric Excitation." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97070.

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Abstract Since the discovery of parametric anti-resonance, parametric excitation has also become more prominent for its stabilizing properties. While resonance and anti-resonance are mostly studied individually, there are systems where both effects appear simultaneously at each combination resonance frequency. With a steep transition between them and a high sensitivity of their relative positions, there is a need for a concurrent study of resonance and anti-resonance. The semi-analytical method of normal forms is used to derive approximate analytical expressions describing the magnitude of the stability impact as well as the precise locations of stabilized and destabilized areas. The results reveal that the separate appearance of resonance and anti-resonance is only a special case with synchronous parametric excitation. In particular, in circulatory systems the simultaneous appearance is expected to be much more common.
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Kazemi, Hesaneh, Ashkan Vaziri, and Julián Norato. "Topology Optimization of Multi-Material Lattices for Maximal Bulk Modulus." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97370.

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Abstract In this paper, we present a method for multi-material topology optimization of lattice structures for maximum bulk modulus. Unlike ground structure approaches that employ 1-d finite elements such as bars and beams to design periodic lattices, we employ a 3-d representation where each lattice bar is described as a cylinder. To accommodate the 3-d bars, we employ the geometry projection method, whereby a high-level parametric description of the bars is smoothly mapped onto a density field over a fixed analysis grid. In addition to the geometric parameters, we assign a size variable per material to each bar. By imposing suitable constraints in the optimization, we ensure that each bar is either made exclusively of one of a set of a multiple available materials or completely removed from the design. These optimization constraints, together with the material interpolation used in our formulation, make it easy to consider any number of available materials. Another advantage of our method over ground structure approaches with 1-d elements is that the bars in our method need not be connected at all times (i.e., they can ‘float’ within the design region), which makes it easier to find good designs with relatively few design variables. We illustrate the effectiveness of our method with numerical examples of bulk modulus maximization for two-material lattices with orthotropic symmetry, and for two- and three-material lattices with cubic symmetry.
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Saravanan, Pratima, Charity Hipple, Jingxin Wang, Christopher McComb, and Jessica Menold. "Decision-Making in the Prescription of Orthotics and Prosthetics for Partial-Foot Amputees." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97470.

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Abstract Prosthetists face a daunting number of decisions that directly affect an amputee’s ability to walk and indirectly affect the overall quality of life of that amputee. In addition, the lack of resources in low-income countries provides a barrier to receive care after an amputation, and approximately 80% of amputees in low-income countries lack appropriate prosthetic care. In this research, we are motivated to understand what factors affect the decision-making strategies of prosthetists and podiatrists when prescribing prosthetics and orthotics to partial foot amputees. This work establishes a decision-making framework as a step towards automated methods that may reduce the complexities and decision-making burden of prosthetic prescription, ultimately increasing the efficiency of prosthetic prescription in low-resourced areas. A decision-making model is proposed based on an extensive literature review of over 100 papers. The proposed model is compared to qualitative data regarding decision-making strategies during prosthetic or orthotic prescription collected from nine prosthetists, surgeons, and other healthcare professionals directly involved in amputee care. Changes to the proposed model are described and future work exploring the role of automated methods to support decision-making in the context of prosthetics is discussed.
5

Pakravan, Mohammad H., and Nordica MacCarty. "An Agent-Based Modeling Approach for Clean Technologies Adoption Using Theory of Planned Behavior Based Decision-Making." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97670.

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Abstract Technology adoption in low-income regions is among the key challenges facing international development projects. Nearly 40% of the world’s population relies on open fires and rudimentary cooking devices exacerbating health outcomes, deforestation, and climatic impacts of inefficient biomass burning. Clean technology alternatives such as clean cookstoves are among the most challenging technologies to approach their target goals through sustainable adoption due to lack of systematic market-driven design for adoption. Thus, a method is needed to provide insight regarding how target customers evaluate and perceive causes for adopting a clean technology. The holistic approach of this study captures the three main aspects of technology adoption through lenses of social networks, individual and society scale beliefs, and rational decision-making behavior. Based on data collected in the Apac region in Northern Uganda, an Agent-Based Model is developed to simulate emerging adoption behavior in a community. Then, four different scenarios investigate how adoption patterns change due to potential changes in technology or intervention strategy. These scenarios include influence of stove malfunctions, price elasticity, information campaigns, and strength of social network. Results suggest that higher adoption rates are achievable if designed technologies are more durable, information campaigns provide realistic expectations for users, policy makers and education programs work toward women’s empowerment, and communal social ties are recognized for influence maximization. Application of this study provides insight for technology designers, project implementers, and policy makers to update their practices for achieving sustainable and to the scale clean technology adoption rates.
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Březina, Martin, Jana Petzová, and Ľudovít Kupča. "Evaluation of Mechanical Properties of Primary Circuit Components Using SPT Technique." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97170.

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The paper deals with the evaluation of mechanical properties of safety-related components of the primary circuit of nuclear power plants (NPPs). During a long-term operation of NPPs, changes of mechanical properties occur. To ensure the safe operation of NPP it is necessary to monitor and evaluate these changes. One possibility how to solve this problem is a direct sampling and the assessment of the actual mechanical properties using the small punch test (SPT) technique. By the SPT technique it is possible to evaluate the basic tensile properties such as the ultimate tensile strength and the yield stress of the tested materials as well as the transition temperature. The authors describe model examples of surface sampling using the special Rolls Royce equipment SSam™-2. The SPT specimens were prepared from the removed samples by application of the wire electrical discharge machining and fine grinding. The prepared specimens were tested and the obtained data were evaluated. Original pieces of primary tubes with diameter 500 mm made of stainless steel type 08Ch18N10T (AISI 321) were used for these model examples. Another experimental material used was a block of the reactor pressure vessel wall cut from NPP Greifswald Unit 7 which contains a weld joint. Those experiments were a part of the preparatory activities for the planned sampling and the assessment of the actual mechanical properties of primary components such as the main primary coolant piping, the steam generator shell and the reactor pressure vessel.
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Vlcek, Libor. "Corrosion Fatigue Evaluation of Austenitics Stainless Steels: The New Proposal to the Czech Standard in the Area of Nuclear Power Plants Type WWER." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97270.

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In the Czech Republic the NTD A.M.E. (Normatively Technical Documentation of Association of Mechanical Engineers) standard [1] is recommended by the State Office for Nuclear Safety for assessment of components and piping in the nuclear power plants of WWER type. So far the fatigue life assessment is based on fatigue design curves or mathematical formulas which are based on experimental tests in air environment conditions only. The present paper is dealing with the new proposal of Czech approach in the area of corrosion fatigue interaction. Based on original Russian works the environmental aspects were taken into account for the case of fatigue life evaluation. The aim of this work is to clarify the main idea of the new proposal of appropriate part of NTD A.M.E. residual life section. In the frame of primary water corrosion fatigue interaction not only theoretical background, but also low-cycle fatigue tests in primary water are presented.
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Herter, Karl-Heinz, Xaver Schuler, and Thomas Weissenberg. "Crack Growth Behavior of Ferritic Pressure Vessel Steels in Oxygenated High Temperature Water Under Transient Loadings." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97370.

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The assessment of the influence of the LWR coolant environment and postulated chloride transients on the crack growth is of importance for ageing management with regard to safety and reliability. Aim of the investigations was to determine cyclic crack growth rates at LWR conditions and to study possible size effects and the impact of chlorides on environmentally assisted cracking. Crack growth experiments were performed with fracture mechanics specimens of different size in simulated BWR water of high purity and under the effect of chloride transients with RPV steel 22NiMoCr3-7. Subsequent to a phase of cyclic loading, the specimens were exposed to static load, interrupted by partial unloadings. All cyclic crack growth rates da/dN vs. ΔK in high purity water were in good agreement with ASME XI water curves. No significant influence of specimen size on the crack growth behavior and with regard to SCC could be detected in high purity water environment. Cyclic induced crack propagation immediately stopped when turning to static load. Under static load the chloride transients did not cause crack initiation by SCC. Load transients in chloride containing environment initiated significant SCC-induced crack growth. A “chloride memory effect” with regard to a preceding chloride transient at static load, leading to SCC-induced crack propagation during subsequent load transients in high purity water environment did not arise.
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Vivio, Francesco, Luca Gaetani, Michele Ferracci, and Alessandro Masia. "Detail Investigation of Omega Method for Creep Analysis of Pressure Vessel Components." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97470.

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A comprehensive creep material model for evaluation of high temperature applications of ferritic, martensitic and austenitic steels is available in API 579-1/ASME FFS and in ASME VIII Div 2 CC-2605-1 codes based on MPC Project Omega. Although the model can be used directly to analyze pressure vessels components behavior in a non-linear finite element creep analysis, several numerical and theoretical limits are to be taken into account in the implementation of the FE user-subroutine of the material model. In this context, a deep parametric analysis, both theoretical and numerical, based on different possible operating conditions and material behavior (temperature, pressure, stress field, elastic-plastic material properties and plastic flow rules) has been performed to review the model results on a high pressure vessel component. Based on results of these analyses, a theoretical critical review of the method is presented.
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Kang, Ki-Sig, and John H. Moore. "IAEA Activities on Concrete Ageing in Containment and Other Structures in Nuclear Power Plants." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97570.

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Abstract:
Significant industry developments over the past decade have placed concrete ageing at the forefront of life extension decisions related to nuclear power plants. Recent issues encountered include alkali–silica reactivity in concrete, delamination events, larger than anticipated loss of pre-stressing force, spent fuel pool leakage, corrosion of steel reinforcement in water intakes, and others. Concrete structures at nuclear power plants are being asked to perform for longer periods than originally design life. Utilities around the world are investigating plant service life extensions (with 60 years or more total being a quoted target), and for some projects delayed construction schedules, and/or decommissioning strategies that involve the use of containment as a “safe store” for periods of up to 100 years, mean that containment buildings and other concrete structures often have to perform their functions for a time period significantly greater than their initial design life. Newer plants are designed with design lives of 60 years or more. Concrete is a durable material and its performance as part of the containment function in NPPs has been good. However, experience shows that ageing degradation of concrete structures, often caused or accelerated by factors such as faulty design, use of unsuitable or poor quality materials, improper construction, exposure to aggressive environments, excessive structural loads, and accident conditions, can impair its safety functions and increase risks to public health and safety. Effective ageing management of concrete containment buildings and other concrete structures is therefore required to ensure their fitness-for-service throughout the plant service life and during decommissioning. The paper presented will present current International Atomic Energy Agency activities in the area of concrete structures and ageing management, and point to where guidelines and best practises related to concrete structure ageing management, relevant operating experience, and applicable codes and standards may be located.

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