9 results on '"William P. P. Silva"'
Search Results
2. Finding the Minimum Norm and Center Density of Cyclic Lattices via Nonlinear Systems
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Pinto, William Lima da Silva and Alves, Carina
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Computer Science - Information Theory ,11H31, 52C17, 15A15, 15A03, 90C30 - Abstract
Lattices with a circulant generator matrix represent a subclass of cyclic lattices. This subclass can be described by a basis containing a vector and its circular shifts. In this paper, we present certain conditions under which the norm expression of an arbitrary vector of this type of lattice is substantially simplified, and then investigate some of the lattices obtained under these conditions. We exhibit systems of nonlinear equations whose solutions yield lattices as dense as $D_n$ in odd dimensions. As far as even dimensions, we obtain lattices denser than $A_n$ as long as $n \in 2\mathbb{Z} \backslash 4\mathbb{Z}$., Comment: preprint, 28 pages, 1 figure
- Published
- 2021
3. Well-Rounded Lattices via Polynomials
- Author
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Alves, Carina, Pinto, William Lima da Silva, and de Andrade, Antonio Aparecido
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Computer Science - Information Theory ,15A03, 15A06, 15A15, 11C08, 11C20, 11H31 - Abstract
Well-rounded lattices have been a topic of recent studies with applications in wiretap channels and in cryptography. A lattice of full rank in Euclidean space is called well-rounded if its set of minimal vectors spans the whole space. In this paper, we investigate when lattices coming from polynomials with integer coefficients are well-rounded.
- Published
- 2019
4. Mapping Bone Marrow Cell Response from Senile Female Rats on Ca-P-Doped Titanium Coating
- Author
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Leonardo P. Faverani, William P. P. Silva, Cecília Alves de Sousa, Gileade Freitas, Ana Paula F. Bassi, Jamil A. Shibli, Valentim A. R. Barão, Adalberto L. Rosa, Cortino Sukotjo, Wirley G. Assunção, Universidade Estadual Paulista (UNESP), Universidade de São Paulo (USP), University of Guarulhos (UnG), Universidade Estadual de Campinas (UNICAMP), and University of Illinois at Chicago
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oxidation ,stromal mesenchymal cells ,dental implants ,titanium surfaces ,Technology ,Microscopy ,QC120-168.85 ,CÉLULAS-TRONCO ,Titanium surfaces ,QH201-278.5 ,Dental implants ,Engineering (General). Civil engineering (General) ,Stromal mesenchymal cells ,TK1-9971 ,Descriptive and experimental mechanics ,Oxidation ,General Materials Science ,Electrical engineering. Electronics. Nuclear engineering ,TA1-2040 - Abstract
Made available in DSpace on 2022-04-28T19:50:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-02-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Chemical and topographical surface modifications on dental implants aim to increase the bone surface contact area of the implant and improve osseointegration. This study analyzed the cellular response of undifferentiated mesenchymal stem cells (MSC), derived from senile rats’ femoral bone marrow, when cultured on a bioactive coating (by plasma electrolytic oxidation, PEO, with Ca2+ and P5+ ions), a sandblasting followed by acid-etching (SLA) surface, and a machined surface (MSU). A total of 102 Ti-6Al-4V discs were divided into three groups (n = 34). The surface chemistry was analyzed by energy dispersive spectroscopy (EDS). Cell viability assay, gene expression of osteoblastic markers, and mineralized matrix formation were investigated. The cell growth and viability results were higher for PEO vs. MSU surface (p = 0.001). An increase in cell proliferation from 3 to 7 days (p < 0.05) and from 7 to 10 days (p < 0.05) was noted for PEO and SLA surfaces. Gene expression for OSX, ALP, BSP, and OPN showed a statistical significance (p = 0.001) among groups. In addition, the PEO surface showed a higher mineralized matrix bone formation (p = 0.003). In conclusion, MSC from senile female rats cultured on SLA and PEO surfaces showed similar cellular responses and should be considered for future clinical investigations. Department of Diagnosis and Surgery Division of Oral and Maxillofacial Surgery and Implantology School of Dentistry São Paulo State University—UNESP Dental Prosthesis Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University—UNESP Bone Res Lab School of Dentistry of Ribeirao Preto University of São Paulo (USP) Department of Periodontology and Oral Implantology Dental Research Division University of Guarulhos (UnG) Department of Prosthodontics and Periodontology Piracicaba Dental School University of Campinas (UNICAMP) Department of Restorative Dentistry College of Dentistry University of Illinois at Chicago Department of Diagnosis and Surgery Division of Oral and Maxillofacial Surgery and Implantology School of Dentistry São Paulo State University—UNESP Dental Prosthesis Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University—UNESP FAPESP: 2016/20297-6
- Published
- 2021
5. Accuracy, Sensitivity and Specificity of Fine Needle Aspiration Biopsy for Salivary Gland Tumors: A Retrospective Study from 2006 to 2011
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William P P, Silva, Roberta T, Stramandinoli-Zanicotti, Juliana L, Schussel, Gyl H A, Ramos, Sergio O, Ioshi, and Laurindo M, Sassi
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accuracy ,specificity ,fine-needle aspiration ,sensitivity ,Salivary Gland Tumor ,Research Article - Abstract
Objective: This article concerns evaluation of the sensitivity, specificity and accuracy of FNAB for pre-surgical diagnosis of benign and malignant lesions of major and minor salivary glands of patients treated in the Department of Head and Neck Surgery of Erasto Gartner Hospital. Methods: This retrospective study analyzed medical records from January 2006 to December 2011 from patients with salivary gland lesions who underwent preoperative FNAB and, after surgical excision of the lesion, histopathological examination. Results: The study had a cohort of 130 cases, but 34 cases (26.2%) were considered unsatisfactory regarding cytology analyses. Based on the data, sensitivity was 66.7% (6/9), specificity was 81.6% (71/87), accuracy was 80.2% (77/96), the positive predictive value was 66,7% (6/9) and the negative predictive value was 81.6% (71/87). Conclusion: Despite the high rate of inadequate samples obtained in the FNAB in this study the technique offers high specificity, accuracy and acceptable sensitivity.
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- 2016
6. USE OF LOW-POWER LASER IN THE TREATMENT OF ORAL LICHEN PLANUS: A NARRATIVE REVIEW.
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Prado, Rosa Gabrielly Silva, Passos, Leonardo Alves Bispo, Filho, William José E Silva, Prado, Pedro Gabriel Silva, Ribeiro, Maria Amália Gonzaga, and Sá, Melka Coelho
- Abstract
The pharmacological treatment used for oral lichen planus lesions has limitations. The present review sought to evaluate the efficacy of the treatment of oral lichen planus lesions by means of the low-power laser, pointed out as a promising alternative. A search in the PubMed/MEDLINE databases, Google Scholar, and Scielo was performed applying the descriptors "Oral Lichen Planus," "Low Power Laser," and "Laser Therapy" with a filter for publications of the last 10 years. The following exclusion criteria were adopted: literature reviews; systematic reviews, high power laser; and studies involving other oral injuries. Thirteen articles were used in the present study. The treatment of the oral lichen planus through the low-power laser, causes pain reduction (evaluated through the visual analog). Response rate assessment methods indicated significant reduction of scores in the groups that received laser therapy treatment. Clinical data, scored according to the Thongprasom scale, showed significant decrease in the score after treatment. Evaluation of psychological factors through Beck's anxiety scale also pointed at significant improvements. Laser therapy is more effective in relation to the treatment with corticosteroids and can be used as a new mode of treatment of oral lichen injuries or as an adjuvant in treatment. [ABSTRACT FROM AUTHOR]
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- 2022
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7. EVALUATION OF KINESIOTHERAPY ON PAIN CONTROL AND SWELLING FOR THIRD MOLAR TOOTH REMOVAL: SYSTEMATIC REVIEW AND META-ANALYSIS.
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De Souza, Laura Luiza Trindade, Sabey, Mark Jon Santana, Filho, William José E Silva, De Almeida Souza, Liane Maciel, and Takeshita, Wilton Mitsunari
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This study aimed to evaluate the postoperative effects of kinesiotherapy (KT) on pain control and swelling for third molar tooth removal through a systematic review and meta-analysis. The systematic review (SR) was conducted in the following electronic databases: PubMed, Scopus, Embase, SciELO, Web of Science, LILACS, IEEE Xplore, OpenGrey, and Open Access Thesis and Dissertations using the PICOT strategy to answer the question: "Does the use of kinesiotapes change pain and postoperative edema in patients undergoing extraction of third molars?" Treatment effects were defined as a standardized mean difference (SMD), and 95% CI were established. The GRADE tool was used to assess the quality of SR evidence. For the meta-analysis, 6 studies were included. In our study, we observed the effectiveness of KT for edema control in the initial postoperative period (SMD = −0.88, 95% CI, −1.41 to −0.35, P =.001). The initial postoperative pain control showed advantages of using kinesiotape with a statistically significant difference (SMD = −1.55, 95% CI, −2.05 to −1.05, P <.001). KT can be an important third molar postoperative adjunctive treatment to slightly reduce pain and moderately reduce edema. [ABSTRACT FROM AUTHOR]
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- 2022
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8. EVALUATION OF QUALITY OF LIFE AND INVOLVEMENT OF THE ORAL MUCOSA IN DERMATOLOGICAL PATIENTS.
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Filho, William José E Silva, De Souza, Laura Luiza Trindade, De Matos Araujo Moraes, Willian Gabriell, Prado, Rosa Gabrielly Silva, Silva, Wianne Santos, Ribeiro, Maria Amalia Gonzaga, and Sá, Melka Coelho
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To evaluate the effect of oral lesions on quality of life, using the World Health Organization's Quality of Life Scale questionnaire, and to perform a clinical analysis of oral impairment in lesions identified in patients with oral manifestations of dermatologic diseases. This is a prospective longitudinal clinical trial using a convenience sample. Patients seen at the oral diagnosis sector who presented oral manifestations of pemphigus vulgaris and oral lichen planus (OLP), diagnosed histopathologically, were recruited. Five patients were treated, with the most prevalent diseases being OLP (4 cases) and pemphigus vulgaris (1 case). Greater prevalence among middle-aged females was noted. Of patients with OLP, half reported painful symptoms, and in the assessment of quality of life, they had average scores for overall quality of life and general health perception in the environmental and psychological domains when compared to those without painful symptoms. Oral manifestations have an effect on patients' quality of life. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
- View/download PDF
9. REPRODUCIBILITY AND RELIABILITY OF CEPHALOMETRIC LANDMARK DETECTION USING THE CEFBOT ARTIFICIAL INTELLIGENCE SOFTWARE.
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Filho, William José E Silva, Menzes, Liciane Dos Santos, Silva, Thaísa Pinheiro, Carvalho, Mariana Mendonça Hughes, Santos, Marcos Antônio Lima Dos, De Freitas, Paulo Henrique Luiz, and Takeshita, Wilton Mitsunari
- Abstract
Evaluate the reproducibility and reliability of a Cefbot-AI software in the identification of cephalometric points in lateral cephalometric radiographs. Thirty lateral cephalometric radiographs obtained with Orthophos XG5/Ceph (Dentsply Sirona, Pennsylvania) were selected, and 19 cephalometric points were marked on each radiograph by a control (ECont) and a calibrated (ECal) examiner and by the Cefbot-AI software (RadioMemory, Belo Horizonte, Brazil). Reliability was assessed by a new analysis of the radiographs 15 days after the first record. Statistical significance was set at P <.05. Excellent reliability was observed in the landmarks of all examiners, as well as in those made by Cefbot-AI (mean intraclass correlation coefficient >0.93). As for reproducibility, comparisons between the performance of ECont and ECal revealed some cephalometric points with a statistically significant difference on the x -axis, namely, S (P =.048), Po (P <.001), and ENA (P =.013). ECont and Cefbot revealed only 1 point, Or (P =.010), with a statistically significant difference on the x -axis. No statistically significant differences were found on the y -axis. Excellent reliability and good reproducibility of Cefbot-AI was observed, suggesting that Cefbot is an excellent auxiliary tool for cephalometric analysis but still dependent on professional assessment for clinical use. [ABSTRACT FROM AUTHOR]
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- 2022
- Full Text
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