Bibliografías temáticas / Pvi

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Literatura académica sobre el tema "Pvi"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Pvi"

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Janistyn, B. "Effects of Adenosine-3′: 5′-monophosphate (cAMP) on the Activity of Soluble Protein Kinases in Maize (Zea mays) Coleoptile Homogenates". Zeitschrift für Naturforschung C 41, n.º 5-6 (1 de junio de 1986): 579–84. http://dx.doi.org/10.1515/znc-1986-5-615.

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Seven protein kinases (PI-PVII) from maize (Zea mays) coleoptile homogenates could be detected which phosphorylate a histone-substrate in a polyacrylamide-matrix. The kinases PI, PII and PVI were stimulated by 6 μм cAMP, PHI, PIV and PV were cAMP independent, while PV II was inhibited by 6 μм cAMP.
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Egger, Joseph y Klaus-Peter Hoinka. "Potential Temperature and Potential Vorticity Inversion: Complementary Approaches". Journal of the Atmospheric Sciences 67, n.º 12 (1 de diciembre de 2010): 4001–16. http://dx.doi.org/10.1175/2010jas3532.1.

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Abstract Given the distribution of one atmospheric variable, that of nearly all others can be derived in balanced flow. In particular, potential vorticity inversion (PVI) selects potential vorticity (PV) to derive pressure, winds, and potential temperature θ. Potential temperature inversion (PTI) starts from available θ fields to derive pressure, winds, and PV. While PVI has been applied extensively, PTI has hardly been used as a research tool although the related technical steps are well known and simpler than those needed in PVI. Two idealized examples of PTI and PVI are compared. The 40-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40) datasets are used to determine typical anomalies of PV and θ in the North Atlantic storm-track region. Statistical forms of PVI and PTI are applied to these anomalies. The inversions are equivalent but the results of PTI are generally easier to understand than those of PVI. The issues of attribution and piecewise inversion are discussed.
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Porcaro, Antonio B., Alessandro Tafuri, Marco Sebben, Aliasger Shakir, Giovanni Novella, Marco Pirozzi, Tania Processali et al. "Prostate volume index and prostatic chronic inflammation have an effect on tumor load at baseline random biopsies in patients with normal DRE and PSA values less than 10 ng/ml: results of 564 consecutive cases". Therapeutic Advances in Urology 11 (enero de 2019): 175628721986860. http://dx.doi.org/10.1177/1756287219868604.

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Background: To assess the association of prostate volume index (PVI), defined as the ratio of the central transition zone volume (CTZV) to the peripheral zone volume (PZV), and prostatic chronic inflammation (PCI) as predictors of prostate cancer (PCA) load in patients presenting with normal digital rectal exam (DRE) and prostate-specific antigen (PSA) ⩽ 10 ng/ml at baseline random biopsies. Methods: Parameters evaluated included age, PSA, total prostate volume (TPV), PSA density (PSAD), PVI and PCI. All patients underwent 14 core transperineal randomized biopsies. We considered small and high PCA load patients with no more than three (limited tumor load) and greater than three (extensive tumor load) positive biopsy cores, respectively. The association of factors with the risk of PCA was evaluated by logistic regression analysis, utilizing different multivariate models. Results: 564 Caucasian patients were included. PCA and PCI were detected in 242 (42.9%) and 129 (22.9%) cases, respectively. On multivariate analysis, PVI and PCI were independent predictors of the risk of detecting limited or extensive tumor load. The risk of detecting extensive tumor load at baseline biopsies was increased by PSAD above the median and third quartile as well as PVI ⩽ 1 [odds ratio (OR)=1.971] but decreased by PCI (OR=0.185; 95% CI: 0.088–0.388). Conclusions: Higher PVI and the presence of PCI predicted decreased PCA risk in patients presenting with normal DRE, and a PSA ⩽ 10 ng/ml at baseline random biopsy. In this subset of patients, a PVI ⩽ or >1 is able to differentiate patients with PCA or PCI.
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Hill, Julie C., Julia A. Graber, Esther Jean-Baptiste y Kelly J. Johnson. "Factors Associated With Attitude-Behavior Conflicts Among Sexually Experienced, Rural, Early Adolescents". Journal of Early Adolescence 39, n.º 1 (27 de agosto de 2017): 81–96. http://dx.doi.org/10.1177/0272431617725194.

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Adolescents’ attitudes predict sexual behavior; therefore, attitudes are targeted in sexually transmitted infection (STI) and pregnancy prevention programs. However, attitudes and behaviors do not always align. Young adolescents who have had penile vaginal intercourse (PVI) and have attitudes supportive of PVI have two risk factors for future health risks while those with attitudes in conflict with PVI experience (i.e., attitudes not supportive of PVI) only have one risk factor, that is, early sexual debut. Rural sixth- to eighth-grade students in southern, central Florida who had PVI experience ( N = 162) completed surveys about their sexual history, substance use, PVI refusal skills, and PVI attitudes. Logistic regressions found that longer time since PVI, never trying other drugs, and better PVI refusal skills predicted higher odds of attitude-behavior conflict; thus, youth with attitude-behavior conflicts have fewer predictors of sexual health risk than those without attitude-behaviors conflicts. Those without attitude-behaviors conflicts likely need more focused and intensive interventions.
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Weinmann, Arndt, Verena Steinle, Sandra Koch, Daniel Pinto dos Santos, Jens Uwe Marquardt, Martin Sprinzl, Hauke Lang et al. "Portal vein infiltration in patients with hepatocellular carcinoma: The relevance of correct classification." Journal of Clinical Oncology 35, n.º 15_suppl (20 de mayo de 2017): e15651-e15651. http://dx.doi.org/10.1200/jco.2017.35.15_suppl.e15651.

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e15651 Background: Portal vein invasion (PVI) is has a significant impact on the prognosis of patients with hepatocellular carcinoma (HCC). Patients with PVI are classified as stage C in the BCLC score and systemic therapy is recommended. Patients with minor PVI are frequently misclassified due to radiological challenges in determining malignant PVI or non-adherence to guidelines. The concept of resection or TACE in limited PVI is sometimes followed with the assumption of a negligible influence on survival. Aim of this study is the reevaluation of PVI and the analysis of the impact of a misclassification. Methods: 763 patients with HCC of a total of 1413 were extracted from the clinical registry of our tertiary center as an ongoing effort to reevaluate the extent of PVI in all patients treated between 1/1/2000 and 12/31/2015. PVI was diagnosed by re-evaluating all available CT or MRI scans by an experienced liver imaging radiologist. PVI was documented using the Liver Cancer Study Group of Japan classification ranging from Vp0-Vp4: Vp0 = no PVI; Vp1 = segmental; Vp2 = right anterior or posterior PV; Vp3 = right or left PV; Vp4 = main trunk. The influence on survival was calculated for each BCLC stage. Results: 259 patients (pat) were classified with PVI. Median age at diagnosis was 65.3 years, 213 patients (82.2%) were male. Etiology of liver disease was alcohol (43.6%), viral hepatitis (29.8%), NASH (5.8%), and others (10.4%). No liver disease was present in 18 pat (6.9%). No liver cirrhosis (LCI) was present in 32 pat (12.4%). LCI was classified as Child Pugh stage A/B/C in 65 (25.1%)/109 (42.1%) and 52 (20.1%) of patients. BCLC classification prior to reevaluation in pat with new PVI was A/B/C/D in 9/13/164/71 of cases. Comparing the overall survival (OS) of pat initially classified as BCLC A with or without PVI was 21.3 months vs. 106.4 months (p = 0.001), in BCLC B the OS was 11.0 months vs. 37.7 months (p = 0.001). Conclusions: Even minor PVI leads to dismal prognosis. Meticulous evaluation of cross sectional imaging is crucial for the clinical management of patients with HCC. Once PVI has been diagnosed, such patients have to be classified as advanced stage. The guidelines should be followed closely, irrespective of the extent of PVI.
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Maisey, Nick, Ian Chau, David Cunningham, Andrew Norman, Matt Seymour, Tamas Hickish, Tim Iveson et al. "Multicenter Randomized Phase III Trial Comparing Protracted Venous Infusion (PVI) Fluorouracil (5-FU) With PVI 5-FU Plus Mitomycin in Inoperable Pancreatic Cancer". Journal of Clinical Oncology 20, n.º 14 (15 de julio de 2002): 3130–36. http://dx.doi.org/10.1200/jco.2002.09.029.

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PURPOSE: To compare protracted venous infusion (PVI) fluorouracil (5-FU) with PVI 5-FU plus mitomycin (MMC) in patients with advanced pancreatic cancer in a multicenter, prospectively randomized study. PATIENTS AND METHODS: Two hundred eight patients were randomized to PVI 5-FU (300 mg/m2/d for a maximum of 24 weeks) or PVI 5-FU plus MMC (7 mg/m2 every 6 weeks for four courses). The major end points were tumor response, survival, toxicity, and quality of life (QOL). RESULTS: The two treatment groups were balanced for baseline demographic factors, and 62% had metastatic disease. The overall response rate was 8.4% (95% confidence interval [CI]) 3.2% to 13.7% for patients treated with PVI 5-FU alone compared with 17.6%; 95% CI 10.3% to 25.1% for PVI 5-FU plus MMC (P = .04). Median failure-free survival was 2.8 months for PVI 5-FU and 3.8 months for PVI 5-FU plus MMC (P = .14). Median survival was 5.1 months for PVI 5-FU and 6.5 months for PVI 5-FU plus MMC (P = .34). Toxicities in both arms were mild. There was an increased incidence of neutropenia in the 5-FU plus MMC arm (P < .01), although no differences in infection were seen. No patients developed hemolytic uremic syndrome. Global QOL improved significantly after 24 weeks of treatment compared with baseline for patients receiving 5-FU plus MMC, although there was no statistically significant difference in QOL between arms. CONCLUSION: PVI 5-FU plus MMC resulted in a superior response rate in comparison with PVI 5-FU alone in advanced pancreatic cancer, but this did not translate into a survival advantage. These results emphasize the importance of chemotherapy in this setting and the continuing value of the fluoropyrimidines in pancreatic cancer.
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Sanders, Stephanie A., Brandon J. Hill, William L. Yarber, Cynthia A. Graham, Richard A. Crosby y Robin R. Milhausen. "Misclassification bias: diversity in conceptualisations about having 'had sex'". Sexual Health 7, n.º 1 (2010): 31. http://dx.doi.org/10.1071/sh09068.

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Background: Understanding the signification of the word ‘sex’ has implications for both medical research and clinical practice. Little is known about how people of varying ages define sex and how situational qualifiers influence definitions across age groups. To our knowledge, this is the first study of a representative sample to assess attitudes about which sexual behaviours constitute having ‘had sex’ and to examine possible mediating factors (gender, age, giving/receiving stimulation, male ejaculation, female orgasm, condom use or brevity). Methods: A telephone survey of English-speaking residents of Indiana (USA) using random-digit-dialling produced a final sample of 204 men and 282 women (n = 486) ranging in age from 18 to 96 years. Questions assessed the respondents’ attitudes on manual-genital (MG), oral-genital (OG), penile-vaginal intercourse (PVI) and penile-anal intercourse (PAI) behaviours. Results: There was no universal consensus on which behaviours constituted having ‘had sex’. More than 90% responded ‘yes’ to PVI but one in five responded ‘no’ to PAI, three in 10 responded ‘no’ to OG and about half endorsed MG. Fewer endorsed PVI with no male ejaculation (89.1%) compared with PVI without a qualifier (94.8%, P < 0.001). MG was endorsed more often when received (48.1%) than given (44.9%, P < 0.001). Among men, the oldest and youngest age groups were significantly less likely to believe certain behaviours constituted having ‘had sex’. Conclusions: These findings highlight the need to use behaviour-specific terminology in sexual history taking, sex research, sexual health promotion and sex education. Researchers, educators and medical practitioners should exercise caution and not assume that their own definitions of having ‘had sex’ are shared by their research participants or patients.
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Takizawa, Hideo, Thea Gabra-Sanders y J. Douglas Miller. "Variations in pressure-volume index and CSF outflow resistance at different locations in the feline craniospinal axis". Journal of Neurosurgery 64, n.º 2 (febrero de 1986): 298–303. http://dx.doi.org/10.3171/jns.1986.64.2.0298.

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✓ Pressure volume index (PVI) and cerebrospinal fluid (CSF) outflow resistance (Ro) were estimated in spontaneously breathing anestheized cats by the bolus injection test under normal conditions and also under abnormal conditions produced by slow infusion of saline into the CSF space. Bolus injections were made separately into the lumbar subarachnoid space, cisterna magna, and lateral ventricle. The mean PVI values in the lumbar sac, cisterna magna, and lateral ventricle under normal conditions were 0.70, 0.71, and 0.64 ml, respectively; not significantly different from each other. Saline infusion lowered PVI significantly at every site; PVI values in the lumbar sac, cisterna magna, and lateral ventricle were 0.54, 0.52, and 0.53 ml, respectively; not significantly different from each other. Indirect values of PVI were calculated from the pressure responses observed at sites other than where the bolus had been injected. These indirect PVI values were always greater than PVI at the injection site under normal conditions, but differences between direct and indirect PVI values were abolished during saline loading of the CSF space. The Ro was estimated under normal conditions in the lumbar sac, cisterna magna, and lateral ventricle to be 81.6, 85.6, and 110.3 mm Hg/ml/min, respectively. The lateral ventricle Ro was significantly higher than at other places. These findings suggest that, when there is no blockage in the craniospinal axis, the pressure response to a bolus change in CSF volume is freely transmitted, direct measurements of PVI are independent of location, and indirect measurements are larger because of “buffering” in the CSF space. When PVI is lowered and buffering capacity is exhausted, these differences between direct and indirect PVI values disappear.
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Gray, W. John y Michael J. Rosner. "Pressure-volume index as a function of cerebral perfusion pressure". Journal of Neurosurgery 67, n.º 3 (septiembre de 1987): 369–76. http://dx.doi.org/10.3171/jns.1987.67.3.0369.

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✓ The pressure-volume index (PVI) was measured as a function of cerebral perfusion pressure (CPP) in 12 adult cats. Anesthesia was induced with methohexital in six animals and with pentobarbital in six animals; all were maintained on an N2O:O2 (70%:30%) mixture. The CPP was either increased in 10-torr increments using norepinephrine or decreased by a combination of adenosine triphosphate and hemorrhage in subgroups. Three estimations of PVI were made at each level of CPP. The PaCO2, body temperature, and hematocrit were controlled at normal levels throughout. In both groups there was a linear relationship between PVI and CPP with increasing CPP being reflected by a rise in PVI. This relationship was more marked in the methohexital group: PVI = 0.37 ml + 0.0005 mm Hg CPP in the pentobarbital group, and PVI = 0.14 ml + 0.0019 mm Hg CPP in the methohexital group. These results indicate that the PVI is not independent of CPP but is a function of CPP and is profoundly influenced by anesthesia.
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Dincic, Dragan, Ognjen Gudelj, Ivica Djuric y Milan Marinkovic. "Pulmonary veins isolation in a patient with atrial fibrillation and pronounced vagal response: Is it enough?" Vojnosanitetski pregled 74, n.º 5 (2017): 498–501. http://dx.doi.org/10.2298/vsp160212081d.

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Introduction. Pulmonary vein isolation (PVI) by antral circumferential ablation is the standard procedure for patients with symptomatic and drug-refractory paroxysmal atrial fibrillation (AF). In some patients addition of ganglionated plexi (GP) modification in anatomic locations to PVI confers significantly better outcomes than PVI alone. Case report. We reported a patient with paroxysmal, symptomatic AF and severe bradycardia a month prior to ablation. The patient was treated with antiarrhythmic drugs without success. Because of severe bradicardia the patient was implanted with a temporary pace maker two days before PVI. During PVI the decision was made to also do a modification of the left GP. Three months after the procedure the patients was in stable sinus rhythm without any symptoms. Conclusion. In selected patients with paroxysmal AF and pronounced vagal response PVI by circumferential antral ablation combined with GP modification during single ablation procedure can produce higher success rates than PVI or GP ablation alone.
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Tesis sobre el tema "Pvi"

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Kollari, Enes. "Pulmonary vein isolation (PVI) in patients with atrial fibrillation". Thesis, Örebro universitet, Institutionen för medicinska vetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-66697.

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Schubert, Martin Verfasser], Marcus A. [Akademischer Betreuer] [Glomb y Thomas [Akademischer Betreuer] Simat. "Untersuchungen zum Einsatz von PVI, PVP bei Bier und Wein / Martin Schubert. Betreuer: Marcus Glomb ; Thomas Simat". Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2011. http://d-nb.info/1025231163/34.

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Beckené, Stéphanie [Verfasser]. "Evaluation der Aussagekraft des Plethysmographie-Variabilitätsindex (PVI) während operativer Eingriffe bei Früh- und Neugeborenen / Stéphanie Beckené". Bonn : Universitäts- und Landesbibliothek Bonn, 2015. http://d-nb.info/1080592083/34.

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Souza, João Augusto Leonel de [UNESP]. "Pressão subaracnóide, índice pressão volume e parâmetros cardiorrespiratórios em ovinos submetidos a mielografia lombar". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143861.

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A mielografia é muito realizada na prática veterinária, entretanto, existem importantes efeitos adversos associados a ela. O objetivo da presente pesquisa foi avaliar os possíveis efeitos sobre a pressão subaracnoide, parâmetros cardiorrespiratórios (TC, FR, FC, PAS, PAD, PAM, EtCO2, SpO2, InspISO e FeISO) e do índice de pressão-volume (PVI) em ovelhas hígidas submetidas à mielografia lombar. Foram utilizados 8 ovinos fêmeas sadios, os quais foram pré-medicados com Midazolan (0,5 mg/Kg), indução anestésica com Propofol (3-6 mg/Kg) e manutenção anestésica com Isoflurano. Primeiramente, os animais foram submetidos à punção da cisterna magna para monitoramento da pressão subaracnoide (Sap). Ato contínuo, foi realizado a mielografia lombar por meio da aplicação de Iohexol (300 mg/mL, taxa de 4,1 mL/min e dose de 0,4 mL/Kg). Os momentos estudados foram: imediatamente após a estabilização anestésica (M0), durante a punção lombar (M1), dois, quatro e seis minutos após a aplicação do contraste (M2, M3 e M4, respectivamente). A Sap foi colhida imediatamente após à punção atlanto-occipital (Sap0), o maior valor durante a aplicação do meio de contraste (Sapmax), dois, quatro e seis minutos após a aplicação do meio de contraste (Sap2, Sap3 e Sap4, respectivamente). Constataram-se diferenças significativas a 5% de confiança entre os momentos as variáveis: TC, PAS, PAD, PAM, InspISO, FeISO Sap e PPC pelo teste de Tukey. Com a correlação de Pearson TC/FR, FC/SpO2, FC/FR, FR/PAS, FR/PAD, FR/PAM, FR/PPC, Sap/PAS, PAD/Sap, PAM/Sap, EtCO2/SPO2, EtCO2/InsplSO, PAD/PAS, PAS/PAM, PAM/PAD, FelSO/InsplSO e Sap/PPC. Com base nos resultados concluímos que os valores de PVI, para a espécie ovina, com a metodologia empregada foi de 17,91 mL. Durante a realização da mielografia lombar ocorre aumento significativo da Sap (média de 101,87 mmHg), provocando grave redução da PPC.
The myelography is very accomplished in veterinary practice, however there are significant adverse effects associated with it. The aim of this research was to evaluate the possible effects of subarachnoid pressure, cardiorespiratory parameters (TC, FR, FC, PAS, PAD, PAM, EtCO2, SpO2, InspISO and FeISO) and pressure-volume index (PVI) in sheep otherwise healthy undergoing lumbar myelography. 8 healthy female sheep were used, which were pre-medicated with midazolam (0.5 mg / kg) anesthetic induction with propofol (3-6 mg / kg) and anesthesia maintained with isoflurane. First, the animals were submitted to the puncture of the cisterna magna and pressure monitoring. Subsequently, the lumbar myelography was performed by application of iohexol (300 mg / ml at rate 4.1 ml / min and a dose of 0.4 ml / kg). The time points studied were: immediately after anesthetic stabilization (M0) during a lumbar puncture (M1), two, four and six minutes after application of contrast (M2, M3 and M4, respectively). Subarachnoid pressure (Sap) was taken immediately after the atlanto-occipital punch (Sap0), the largest value during application of the contrast medium (Sapmax), two, four and six minutes after application of the contrast medium (SAP2, Sap3 and Sap4, respectively). They found significant differences at 5% confidence between times the variables TC, PAS, PAD, PAM, InspISO, FeISO Sap and PPC by Tukey test. With the Pearson correlation TC/FR, FC/SpO2, FC/FR, FR/PAS, FR/PAD, FR/PAM, FR/PPC, Sap/PAS, PAD/Sap, PAM/Sap, EtCO2/SPO2, EtCO2/InsplSO, PAD/PAS, PAS/PAM, PAM/PAD, FelSO/InsplSO and Sap/PPC Based on the results we conclude that the PVI values for the sheep, the methodology employed was 17.91 mL, close to normal values for adults of the human species. While performing the lumbar myelography is significant increase in Sap (average of 101.87 mmHg), causing severe reduction in PPC.
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Yauschew-Raguenes, Nathalie. "Dynamique saisonnière de la végétation forestière (arbres et sous-bois) dans le massif des Landes : application de la télédétection optique au suivi des hétérogénéités à l'échelle régionale". Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14702/document.

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L’objectif de la thèse est d'évaluer l’apport des données satellites dans le suivi saisonnier de la végétation forestière (sous-bois et strate arborée). L'étude a été conduite sur la forêt landaise. Elle est basée sur une série de sept ans d'observations satellitaires décadaires d’un indice de végétation (PVI) et de mesures in situ de la surface foliaire (LAI) du sous-bois et des arbres. Tout d’abord, les observations in-situ ont été analysées. Elles montrent que le sous-bois est le déterminant majeur de la trajectoire saisonnière du LAI de l’ensemble du couvert végétal. Puis, ces informations ont été comparées aux données satellitaires. Il apparaît que la phénologie printanière du PVI renseigne sur celle du LAI du sous-bois. Enfin, ces résultats été exploités à l’échelle régionale et une carte régionale des types de landes a pu être produite. Cette étude ouvre des perspectives en matière d'intégration et de spatialisation des bilans d'eau et de carbone des écosystèmes forestiers à l'échelle régionale
The aim of this thesis is to assess the potential of the remote sensing data to monitor the seasonal dynamic of the forest vegetation (understory and tree canopy). The study has been carried out on the maritime pine forest in the Southwest of France. It is based on a 7-year time-series of the 10-day vegetation index PVI composite derived from satellite and on in situ leaf area measurements (LAI) of understory and tree story.At first, the in situ observations have been analysed. It shows that the understory vegetation is the main driver of the seasonal dynamic of the whole forest LAI (understory+tree story). Then, these informations have been compared with the time-series of remote sensed PVI . It appears that the spring phenology of the PVI informs directly about the LAI understory one.Finally, these results have been used at the regional scale and a regional map of the lande types has been produced. This study opens some new prospects about integration and spatialisation of water and carbon balance of forest ecosystems at regional scale
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Liu, Hailong, Wenhua Qi, Qishan Zhang y Jinpei Wu. "PKI/PMI AND SMART TOKENS IN HEALTHCARE INFORMATION SYSTEMS". International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/606668.

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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada
While healthcare industry is striving to achieve e-health systems for improvements in healthcare quality, cost, and access, privacy and security about medical records should be considered carefully. This paper makes a deep study of Public Key Infrastructures (PKIs) and Privilege Management Infrastructures (PMIs) and how they can secure e-health systems. To access resources, e.g. patient records, both authentication and authorization are needed, so public key certificates and attribute certificates are both required to protect healthcare information. From a typical medical scenario, we see not only static but also dynamic permissions are required. Dynamic authorization maybe the most complex problem in e-health systems.
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7

Bourget, Baptiste. "Ondes internes, de l'instabilité au mélange. Approche expérimentale". Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0912/document.

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Les ondes internes de gravité jouent un rôle important dans les échanges énergétiques océaniques, en particulier par leur mécanisme d'atténuation. Il est alors crucial de déterminer et de quantifier les différents processus permettant un transfert d'énergie vers les petites échelles et aboutissant ainsi au mélange océanique. Nous avons, pour cela, étudié précisément l'un de ces mécanismes: l'Instabilité Paramétrique Sous-harmonique (PSI). Cette instabilité permet la génération de deux ondes internes, de fréquence et de vecteurs d'ondes différents, à partir d'une onde primaire, par interaction non-linéaire résonante. L'étude expérimentale de cette instabilité a ainsi permis de mettre en évidence l'importance de certains paramètres (fréquence, amplitude, largeur de faisceau) quant au développement et à la sélection des ondes secondaires. Ces paramètres influent donc sur le transfert énergétique entre les échelles. En outre notre dispositif expérimental a permis de tester les limites de la théorie développée jusqu'à présent et a conduit à l'élaboration d'un nouveau modèle validé expérimentalement et numériquement.Par ailleurs, nous avons adapté la technique de Fluorescence Induite par Laser (LIF) à des fluides continûment stratifiés afin d'effectuer des mesures simultanées de vitesse (PIV) et de densité (LIF). Cette technique permet ainsi d'étudier expérimentalement l'effet de la propagation et de la déstabilisation des ondes internes de gravité sur une stratification linéaire, et d'accéder à des grandeurs associées au mélange
Internal waves are believed to be of primary importance as they affect energy transfer, especially their dissipation mechanism. Therefore it is crucial to identify and measure the different processes evolving a transfer to smaller scales and leading to oceanic mixing. We have chosen to focus on one of these mechanisms: the Parametric Subharmonic Instability (PSI). This instability allows the generation from a primary wave of two secondary internal waves, with different frequencies and waves vectors, by nonlinear resonant interaction. The experimental study of this instability has helped to highlight the importance of some parameters (frequency, amplitude, beam width) for the development and the selection of secondary waves. Thus these parameters affect the energy transfer between scales. Moreover, our experimental device was used to test the limits of the theory developed so far and has led to the development of a new model, which has been validated experimentally and numerically.In addition, we adapted the technique of Laser Induced Fluorescence (LIF) to continuously stratified fluids, with the aim of performing simultaneous measurements of velocity (PIV) and density (LIF). This technique allows us to study experimentally the effect of propagation and destabilization of internal gravity waves on a linear stratification, and to access to quantities related to the mixing
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Recco, Lucas Custódio [UNESP]. "Produção de Sensor Polimérico reforçado com Nanotubos de Carbono". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/144674.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Neste trabalho foram estudadas síntese e caracterização de filmes finos híbrido de polímeros escovas constituídos de polieletrolíticos reforçados com nanotubos de carbono sobre o substrato de óxido de índio e estanho (ITO). Para a caracterização das superfícies dos filmes foram utilizadas as técnicas de microscopia eletrônica de varredura (MEV), energia dispersiva de raio-x (EDX) e espectroscopia Raman. Foram avaliadas diferentes propriedades estímulo-responsivas dos polímeros escovas que levam a modificações estruturais dos filmes como a influência de pH e da força iônica. Os polímeros escolhidos como modelos foram os polímeros Poli (Vinil Imidazol)-(PVI) e Poli (Àcido Acrilíco)-(PAA). Os ensaios eletroquímicos evidenciaram uma dependência da conformação dos polímeros escovas com a variação de pH e da força iônica e também revelaram o aumento da capacitância desses polímeros quando reforçados com os nanotubos de carbono, sendo que, o PVI obteve melhor resposta quando exposto a pH ácido, uma vez que suas cadeias poliméricas estavam estendidas e carregadas positivamente, permitindo a difusão da espécie redox carregada negativamente até a superfície do eletrodo. O PAA também obteve melhor resposta em meio ácido. Nesse caso as cadeias colapsadas aproximam os tubos do transdutor (ITO), facilitando a troca do par redox. Após a caracterização dos referidos polímeros, os mesmos foram testados como sensores para o monitoramento de hormônios e neurotransmissores que desempenham funções importantes no nosso organismo.
This study describes the synthesis and characterization of hybrid polyelectrolyte based on polymer brush reinforced multi-layer type carbon nanotubes. The characterization of the thin films we used the scanning electron microscopy techniques (SEM), energy dispersive x-ray (EDX) and Raman spectroscopy . The influence of pH and ionic strength were evaluated by electrochemical technique. The polymers Poly (vinyl imidazole) - (PVI) and poly (acrylic acid) - (PAA) were used as matrix brush for anchoring the nanotubes. Electrochemical tests showed a dependence of the conformation of the brush polymers with pH change and ionic strength, and also showed the increase in capacitance of these polymers when reinforced with carbon nanotubes, and the PVI obtained a better response when exposed to acidic pH since its polymer chains were extended and positively charged, allowing the diffusion of negatively charged redox species to the electrode surface. The PAA also obtained better response in acid. In this case the collapsed chains near the transducer tubes (ITO) facilitate the electrons transference. The made electrodes were applied to monitor hormones and neurotransmitters that play important functions in our body.
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Oliveira, Maria José Alves de. "Obtenção de membranas de hidrogéis para tratamento alternativo de Leishmaniose Tegumentar". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-08082013-170247/.

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Os hidrogéis foram obtidos a partir de material polimérico reticulado por processo de radiação ionizante de acordo com a técnica de Rosiak. Nos últimos 40 anos o uso dos hidrogéis têm sido investigado para diversas aplicações como curativos. Neste trabalho foram sintetizadas membranas de hidrogéis com poli(N-2- pirolidona) (PVP), poli(álcool vinílico) (PVAl), quitosana e argila laponita em encapsulamento do fármaco para liberação controlada de glucantime sobre a superfície cutânea de tecidos lesados por leishmaniose. O tratamento tradicional dos pacientes infectados pelos parasitas é feito com antimoniato pentavalente de forma injetável. Entretanto estes antimoniatos são muito tóxicos e provocam efeitos colaterais nestes pacientes, além disso, pacientes portadores de doenças cardíacas e renais não podem fazer uso deste tratamento. No tratamento com membranas de hidrogéis aplicadas na superfície de tecidos lesados pela leishmaniose, o fármaco é liberado diretamente no ferimento de forma controlada, diminuindo os efeitos colaterais. As membranas preparadas neste trabalho foram caracterizadas por difração de raios X (DRX), análise de termogravimetria (TG), intumescimento, fração gel, espectroscopia no infravermelho (FTIR), microscopia eletrônica de varredura (MEV) e microscopia de força atômica (AFM). As caracterizações funcionais foram feitas com teste de citotoxicidade e de liberação do fármaco in vitro e in vivo, de acordo com o protocolo de ética do Instituto de Medicina Tropical do Hospital das Clinicas da Faculdade de Medicina da USP. O teste \"in vivo\" dessas membranas provou ser eficiente na liberação controlada de fármacos diretamente nas superfícies lesadas pela leishmaniose. Nos testes \"in vivo\" as membranas de PVP/PVAl/argila 1,5% e glucantime apresentaram evidente contribuição para redução do ferimento chegando a uma cura clínica.
Polymeric Hydrogels formed by crosslinked polymeric chains were obtained by ionizing radiation process according to Rosiak technique. In the last 40 years the use of hydrogels has been investigated for various applications as curatives. In this work hydrogel membranes were synthesized with poly (N-2-pyrrolidone) (PVP), poly (vinyl alcohol) (PVA), chitosan and laponita clay for use as a vehicle for controlled glucantime release on the surface of skin tissues injured by leishmaniasis. Leishmaniasis is a disease caused by a protozoan parasite of the genus Leishmania transmitted by the bite of phlebotomies sandfly. The traditional treatment of patients infected by these parasites is done with pentavalent antimony in injectable form. However, these antimonates are highly toxic and cause side effects in these patients. In addition, patients with heart and kidney disease can not use this treatment. In treatment with drug delivery hydrogel membrane applied on the surface of leishmaniasis injured tissues the drug is released directly to the wound in a controlled manner, reducing the side effects. Membranes prepared in this study were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TG), swelling, gel fraction, infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The characterizations of cytotoxicity and drug release were made \"in vitro\" and \"in vivo\" with functional test according to ethical protocol of the Division of Infectious and Parasitic Diseases at the Hospital of Clinics, São Paulo University-School of Medicine, University. The \"in vivo\" test of these membranes proved to be effective in controlled release of drugs directly into leishmaniasis damaged tissues. Results of \"in vivo\" tests using PVP/PVAl / clay 1,5% and glucantime membrane showed remarkable contribution to wound reduction and cure in clinical therapy.
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Makhoul, Khaldoun. "CP violation in flavor-tagged Bs̳ --> J/[psi][phi] decays". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53233.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.
In title on title page, [psi][phi] appears as lower case Greek letter italic and double underscored "s" appears as subscript. Cataloged from PDF version of thesis.
Includes bibliographical references (p. 193-200).
In this dissertation, we present the results of a time-dependent angular analysis of Bs -+ J/,0 decays performed with the use of initial-state flavor tagging. CP violation is observed in this mode through the interference of decay without net mixing and decay with net mixing, that is, Bs -- J/0 and Bs -+ B, -+ J/q0. The time-dependent angular analysis is used to extract the decay widths of the heavy and light B, eigenstates and the difference between these decay widths AF, - FL - FH. Initial-state flavor tagging is used to determine the matter-antimatter content of the B. mesons at production time. We combine flavor tagging with the angular analysis, which statistically determines the contributions of the CP-even and CP- odd components at decay time, to measure the CP-violating phase 0,. The phase 3, is expressed in terms of elements of the Cabibbo-Kobayashi-Maskawa matrix as s - arg (-VtsV4/VcsV*b), and is predicted by the Standard Model to be close to zero, O3SM = 0.02. In the measurement of AF,, we use a dataset corresponding to 1.7 fb- of luminosity, collected at the CDF experiment from proton-antiproton collisions at a center of mass energy f = 1.96 TeV. In the measurement of Ps, we use a dataset corresponding to 1.3 fb-1 of collected luminosity. We measure AF, = (0.071+0.064 ± 0.007) ps-1 using the time-dependent angular analysis. Combining the angular analysis with flavor-tagging, we find that assuming the Standard Model predictions of p/ and AF,, the probability of a deviation as large as the level of the observed data is 33%. We obtain a suite of associated results which are discussed in detail in this dissertation alongside the main results.
by Khaldoun Makhoul.
Ph.D.
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Libros sobre el tema "Pvi"

1

Psi, Phi Kappa. The grand catalogue of the Phi Kappa Psi fraternity. [White Plains, N.Y: B.C. Harris Pub. Co., 1985.

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Psi, Phi Kappa. The grand catalogue, 1852-1992. [Indianapolis: Publishing Concepts Inc.], 1991.

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Psi, Phi Kappa. The grand catalogue of the Phi Kappa Psi Fraternity, 1852-1992. White Plains, N.Y: Harris, 1997.

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Monteleone, Brenton P. Texas Alpha: 100 years of history. [Houston, Tex.]: B. P. Monteleone, 2004.

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Pai an jing qi zhi long que pei. Taibei Shi: Wei lai shu cheng gu fen you xian gong si, 2002.

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Bastianini, Guido, Francesca Maltomini y Gabriella Messeri, eds. Papiri della Società Italiana. Vol. XVI. Florence: Firenze University Press, 2013. http://dx.doi.org/10.36253/978-88-6655-383-0.

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Questo volume XVI della serie dei PSI (avviata da Girolamo Vitelli nel 1912) contiene l’edizione di 79 testi in greco scritti su papiro o altro materiale (legno, pergamena) provenienti dall’Egitto e conservati all’Istituto Papirologico «G. Vitelli». Sono presenti sia frammenti di autori noti della letteratura greca (Omero, Esiodo, Erodoto, Tucidide, Senofonte, Isocrate, Demostene, Plutarco; i LXX, Cirillo di Alessandria, il Fisiologo), sia frammenti di opere sconosciute: si segnala fra gli altri un testo di grammatica sul dialetto ionico e un frammento dossografico sulla filosofia aristotelica. Vi sono poi testi di carattere documentario: petizioni, ricevute di tasse, registri, verbali, lettere private, testimonianza della vita quotidiana dell’Egitto di epoca romana e bizantina.
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Bersianik, Louky. Le pique-nique sur l'Acropole: Cahiers d'Ancyl : fiction [phi] et [psi]. Montréal: L'Hexagone, 1992.

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Pei yuan zheng dao: Pai du su hu gan xiao zhi. Xianggang: Tian chuang chu ban, 2009.

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Matoso, Madalena. Pai pai. Taibei Shi: San cai wen hua gu fen you xian gong si, 2016.

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Qu yu pin pai pei zhi mo shi bi jiao yan jiu. Beijing Shi: Zhongguo cai zheng jing ji chu ban she, 2009.

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Capítulos de libros sobre el tema "Pvi"

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Gooch, Jan W. "PVI". En Encyclopedic Dictionary of Polymers, 598. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9643.

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Walsh, E. K. y A. Schettini. "The Pressure-Volume Index (PVI) with Epidural Mass Expansion". En Intracranial Pressure VIII, 771–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-77789-9_169.

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Proietti, Riccardo, Luigi Di Biase, Pasquale Santangeli, Prasant Mohanty, Conor Barrett, Stephan Danik, Sanghamitra Mohanty et al. "Controversy: Circumferential versus segmental pulmonary vein isolation/circumferential PVI". En Practical Guide to Catheter Ablation of Atrial Fibrillation, 176–82. Chichester, UK: John Wiley & Sons Ltd, 2015. http://dx.doi.org/10.1002/9781118658369.ch13a.

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Feld, Gregory K. "Controversy: Circumferential versus segmental pulmonary vein isolation/segmental PVI". En Practical Guide to Catheter Ablation of Atrial Fibrillation, 183–90. Chichester, UK: John Wiley & Sons Ltd, 2015. http://dx.doi.org/10.1002/9781118658369.ch13b.

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Wachi, A. y A. Marmarou. "Clinical Evaluation of a Fiberoptic Device for Measuring PVI". En Intracranial Pressure VII, 55–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73987-3_12.

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Muizelaar, J. P., A. Marmarou y J. D. Ward. "Relation Between CBF, ICP and PVI in Severely Head Injured Children". En Intracranial Pressure VII, 691–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73987-3_180.

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El-Adawy, Y. y M. J. Rosner. "Cerebral Perfusion Pressure, Autoregulation and the PVI Reflection Point: Pathological ICP". En Intracranial Pressure VII, 829–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73987-3_215.

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Muizelaar, J. P., A. Marmarou y A. Wachi. "ICP and PVI with Blood Pressure Alterations and Relation with CBF Autoregulation". En Intracranial Pressure VII, 825–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73987-3_214.

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Ursino, Mauro, C. A. Lodi, S. Rossi y N. Stocchetti. "Estimation of the Main Factors Affecting ICP Dynamics by Mathematical Analysis of PVI Tests". En Intracranial Pressure and Neuromonitoring in Brain Injury, 306–9. Vienna: Springer Vienna, 1998. http://dx.doi.org/10.1007/978-3-7091-6475-4_89.

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Thomas, Sebastian, F. Tabibnia, M. U. Schuhmann, V. H. J. Hans, T. Brinker y M. Samii. "Traumatic Brain Injury in the Developing Rat Pup: Studies of ICP, PVI and Neurological Response". En Intracranial Pressure and Neuromonitoring in Brain Injury, 135–37. Vienna: Springer Vienna, 1998. http://dx.doi.org/10.1007/978-3-7091-6475-4_40.

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Actas de conferencias sobre el tema "Pvi"

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HANSON, RAYMOND. "Situation awareness and the PVI link". En Digital Avionics Systems Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-3885.

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Fang, Fan-quan, Xin-guang Li, Su-mei Li, Dong-xiong Shen y Si-hua Shao. "Based on improved PVI objective evaluation system of English sentences". En 2012 9th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD). IEEE, 2012. http://dx.doi.org/10.1109/fskd.2012.6233902.

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Gao, Yuefen, Xutao Zhang y Guohua Shi. "Performance Value Index of the Solar Air-Conditioning System-PVI". En ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54141.

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Presently, the performance of the air-conditioner or the air-conditioning system is usually valued based on some performance indices. However, it is deficient to evaluate the performance of the air-conditioning system which uses the new energy or renewable energy only based on the indices mentioned above. According to the defects and based on the works of the solar application, a new index defined PVI is put forward to evaluate the performance of the solar air-conditioning system rationally, which is significant to the new energy or renewable energy application.
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Kaminar, Neil. "PVMat improvements in the manufacturing of the PVI Powergrid™". En National renewable energy laboratory and sandia national laboratories photovoltaics program review meeting. AIP, 1997. http://dx.doi.org/10.1063/1.52925.

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Terry, Kathleen. "Using the PVI (People Value Index) Tool to Enhance Project Success". En InSITE 2012: Informing Science + IT Education Conference. Informing Science Institute, 2012. http://dx.doi.org/10.28945/1683.

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Babich, M. V. y Slavyanov S. Yu. "Fuchsian Heun equation, equivalent Fuchsian linear systems and Painlevé PVI equation". En 2018 Days on Diffraction (DD). IEEE, 2018. http://dx.doi.org/10.1109/dd.2018.8553422.

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Nejatian Daraei, H., E. Sahraei y A. Solouk. "Effect of Oil Gravity and Pore Volume Injected (PVI) of Steam to PVI of Foam During Enhanced Oil Recovery by Steam-CO2-Foam Flooding". En SPE Asia Pacific Enhanced Oil Recovery Conference. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/174594-ms.

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Cordes, F., C. Ellermann, D. Dechering, G. Frommeyer, S. Kochhäuser, P. Lange, C. Pott et al. "Ösophageale und mediastinale Läsionen nach Vorhofflimmerablation mittels Cryoenergie: Ergebnisse der MADE-PVI Studie". En Viszeralmedizin 2019. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1695602.

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Wasques, Vinícius Francisco, Estevão Esmi Laureano y Laécio Carvalho De Barros. "Solução Numérica para PVI via aritmética fuzzy interativa: uma aplicação aos modelos epidemiológicos SI". En CNMAC 2017 - XXXVII Congresso Nacional de Matemática Aplicada e Computacional. SBMAC, 2018. http://dx.doi.org/10.5540/03.2018.006.01.0435.

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Benton, Matthew. "From PVI to perception: a return to the roots of rhythm in broadcast news". En Interspeech 2012. ISCA: ISCA, 2012. http://dx.doi.org/10.21437/interspeech.2012-209.

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Informes sobre el tema "Pvi"

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Kaminar, N. R., T. Alexander, J. Amaya, W. R. Bottenberg, P. Carrie, K. Chen, P. Hobden, G. Lawyer, J. Zimmermann y C. Sherring. PVMaT improvements in the manufacturing of the PVI Powergrid{trademark}: Final technical report, 27 October 1997--31 October 1998. Office of Scientific and Technical Information (OSTI), octubre de 1999. http://dx.doi.org/10.2172/750932.

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Kaminar, N., D. Curchod y P. Hobden. PVMaT improvements in the manufacturing of the PVI Powergrid{trademark}: Phase I annual technical report, 26 October 1995--25 October 1996. Office of Scientific and Technical Information (OSTI), mayo de 1997. http://dx.doi.org/10.2172/477687.

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Rogers, Edwin Lloyd. Search for $B_c \to B_s \pi$, $B_s \to J/\psi \phi$ decay with the CDF Detector. Office of Scientific and Technical Information (OSTI), enero de 2010. http://dx.doi.org/10.2172/1369237.

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Kramer, K. Status Quo of PVT Characterization. Editado por Korbinian Kramer,. IEA SHC Task 60, septiembre de 2020. http://dx.doi.org/10.18777/ieashc-task60-2020-0004.

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Report B1: This report therefore aims at displaying the Status Quo of PVT Characterization in order to support PVT technology in its further development and applications. The report is hence of interest for researchers as well as public and private sector stakeholders. A key finding is that the reliability and durability of PVT modules are especially challenged at elevated temperatures and higher humidity loads. The test methods available from the IEC and ISO standards are covering the specifics of PV and ST module’s, most of which are similar for PVT modules, too.
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Aubert, B., R. Barate, M. Bona, D. Boutigny, F. Couderc, Y. Karyotakis, J. P. Lees et al. Search for B+ ->phi pi+ and B0->phi pi0 Decays. Office of Scientific and Technical Information (OSTI), mayo de 2006. http://dx.doi.org/10.2172/882836.

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Makhoul, Khaldoun. CP Violation in Flavor Tagged $B_s \to J/\psi \phi$ Decays. Office of Scientific and Technical Information (OSTI), junio de 2009. http://dx.doi.org/10.2172/981875.

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Weatherall, James H. A measurement of the B0 --> J/psi pi+pi- branching fraction. Office of Scientific and Technical Information (OSTI), septiembre de 2002. http://dx.doi.org/10.2172/801776.

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Ćirić, Slavica, Gordana Cvetković, Slaviša Stojković y Slaviša Gudžić. Detection of PVY, PLRV and PVX Potato Viruses in Some Regions of Serbia. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, mayo de 2018. http://dx.doi.org/10.7546/crabs.2018.04.17.

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Georgiopoulos, Christos H. Observation of the Cabibbo Suppressed Decay D+- ---> phi pi+-. Office of Scientific and Technical Information (OSTI), mayo de 1985. http://dx.doi.org/10.2172/1433241.

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Weatherall, James H. A Measurement of the B{sup 0} {yields} J{psi}{pi}{sup +}{pi}{sup -} Branching Fraction. Office of Scientific and Technical Information (OSTI), marzo de 2002. http://dx.doi.org/10.2172/799034.

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